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 #else 1900 UNUSED(status); 1901 #endif 1902 } 1903 1904 #ifdef ENABLE_CLASSIC 1905 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1906 // SSP Controller 1907 if (features[6] & (1 << 3)){ 1908 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1909 } 1910 // eSCO 1911 if (features[3] & (1<<7)){ 1912 conn->remote_supported_features[0] |= 1; 1913 } 1914 // Extended features 1915 if (features[7] & (1<<7)){ 1916 conn->remote_supported_features[0] |= 2; 1917 } 1918 } 1919 1920 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1921 // SSP Host 1922 if (features[0] & (1 << 0)){ 1923 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1924 } 1925 // SC Host 1926 if (features[0] & (1 << 3)){ 1927 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1928 } 1929 } 1930 1931 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1932 // SC Controller 1933 if (features[1] & (1 << 0)){ 1934 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1935 } 1936 } 1937 1938 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1939 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1940 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1941 if (conn->bonding_flags & BONDING_DEDICATED){ 1942 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1943 } 1944 } 1945 #endif 1946 1947 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1948 // handle BT initialization 1949 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1950 hci_initializing_event_handler(packet, size); 1951 } 1952 1953 // help with BT sleep 1954 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1955 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1956 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1957 hci_initializing_next_state(); 1958 } 1959 } 1960 1961 #ifdef ENABLE_CLASSIC 1962 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1963 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1964 conn->encryption_key_size = encryption_key_size; 1965 1966 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1967 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1968 return; 1969 } 1970 1971 // Request Authentication if not already done 1972 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1973 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1974 } 1975 #endif 1976 1977 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1978 UNUSED(size); 1979 1980 uint16_t manufacturer; 1981 #ifdef ENABLE_CLASSIC 1982 hci_con_handle_t handle; 1983 hci_connection_t * conn; 1984 uint8_t status; 1985 #endif 1986 // get num cmd packets - limit to 1 to reduce complexity 1987 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1988 1989 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1990 switch (opcode){ 1991 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1992 if (packet[5]) break; 1993 // terminate, name 248 chars 1994 packet[6+248] = 0; 1995 log_info("local name: %s", &packet[6]); 1996 break; 1997 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 1998 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1999 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2000 uint16_t acl_len = little_endian_read_16(packet, 6); 2001 uint16_t sco_len = packet[8]; 2002 2003 // determine usable ACL/SCO payload size 2004 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2005 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2006 2007 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2008 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2009 2010 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2011 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2012 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2013 } 2014 break; 2015 case HCI_OPCODE_HCI_READ_RSSI: 2016 if (packet[5] == ERROR_CODE_SUCCESS){ 2017 uint8_t event[5]; 2018 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2019 event[1] = 3; 2020 (void)memcpy(&event[2], &packet[6], 3); 2021 hci_emit_event(event, sizeof(event), 1); 2022 } 2023 break; 2024 #ifdef ENABLE_BLE 2025 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2026 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2027 hci_stack->le_acl_packets_total_num = packet[8]; 2028 // determine usable ACL payload size 2029 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2030 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2031 } 2032 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2033 break; 2034 #endif 2035 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2036 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2037 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2038 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2039 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); 2040 break; 2041 #endif 2042 #ifdef ENABLE_LE_CENTRAL 2043 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2044 hci_stack->le_whitelist_capacity = packet[6]; 2045 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2046 break; 2047 #endif 2048 case HCI_OPCODE_HCI_READ_BD_ADDR: 2049 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2050 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)); 2051 #ifdef ENABLE_CLASSIC 2052 if (hci_stack->link_key_db){ 2053 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2054 } 2055 #endif 2056 break; 2057 #ifdef ENABLE_CLASSIC 2058 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2059 hci_emit_discoverable_enabled(hci_stack->discoverable); 2060 break; 2061 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2062 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2063 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2064 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2065 hci_emit_event(event, sizeof(event), 1); 2066 } 2067 break; 2068 #endif 2069 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2070 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2071 2072 #ifdef ENABLE_CLASSIC 2073 // determine usable ACL packet types based on host buffer size and supported features 2074 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2075 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2076 #endif 2077 // Classic/LE 2078 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2079 break; 2080 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2081 manufacturer = little_endian_read_16(packet, 10); 2082 // map Cypress to Broadcom 2083 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2084 log_info("Treat Cypress as Broadcom"); 2085 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2086 little_endian_store_16(packet, 10, manufacturer); 2087 } 2088 hci_stack->manufacturer = manufacturer; 2089 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2090 break; 2091 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2092 hci_stack->local_supported_commands[0] = 2093 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2094 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2095 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2096 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2097 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2101 hci_stack->local_supported_commands[1] = 2102 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2103 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2104 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2105 break; 2106 #ifdef ENABLE_CLASSIC 2107 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2108 if (packet[5]) return; 2109 hci_stack->synchronous_flow_control_enabled = 1; 2110 break; 2111 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2112 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2113 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2114 conn = hci_connection_for_handle(handle); 2115 if (conn != NULL) { 2116 uint8_t key_size = 0; 2117 if (status == 0){ 2118 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2119 log_info("Handle %x04x key Size: %u", handle, key_size); 2120 } else { 2121 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2122 } 2123 hci_handle_read_encryption_key_size_complete(conn, key_size); 2124 } 2125 break; 2126 #endif 2127 default: 2128 break; 2129 } 2130 } 2131 2132 static void event_handler(uint8_t *packet, uint16_t size){ 2133 2134 uint16_t event_length = packet[1]; 2135 2136 // assert packet is complete 2137 if (size != (event_length + 2u)){ 2138 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2139 return; 2140 } 2141 2142 bd_addr_t addr; 2143 bd_addr_type_t addr_type; 2144 hci_con_handle_t handle; 2145 hci_connection_t * conn; 2146 int i; 2147 int create_connection_cmd; 2148 2149 #ifdef ENABLE_CLASSIC 2150 uint8_t link_type; 2151 #endif 2152 2153 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2154 2155 switch (hci_event_packet_get_type(packet)) { 2156 2157 case HCI_EVENT_COMMAND_COMPLETE: 2158 handle_command_complete_event(packet, size); 2159 break; 2160 2161 case HCI_EVENT_COMMAND_STATUS: 2162 // get num cmd packets - limit to 1 to reduce complexity 2163 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2164 2165 // check command status to detected failed outgoing connections 2166 create_connection_cmd = 0; 2167 #ifdef ENABLE_CLASSIC 2168 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2169 create_connection_cmd = 1; 2170 } 2171 #endif 2172 #ifdef ENABLE_LE_CENTRAL 2173 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2174 create_connection_cmd = 1; 2175 } 2176 #endif 2177 if (create_connection_cmd) { 2178 uint8_t status = hci_event_command_status_get_status(packet); 2179 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2180 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); 2181 2182 // reset outgoing address info 2183 memset(hci_stack->outgoing_addr, 0, 6); 2184 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2185 2186 // error => outgoing connection failed 2187 if ((conn != NULL) && (status != 0u)){ 2188 hci_handle_connection_failed(conn, status); 2189 } 2190 } 2191 break; 2192 2193 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2194 if (size < 3) return; 2195 uint16_t num_handles = packet[2]; 2196 if (size != (3u + num_handles * 4u)) return; 2197 uint16_t offset = 3; 2198 for (i=0; i<num_handles;i++){ 2199 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2200 offset += 2u; 2201 uint16_t num_packets = little_endian_read_16(packet, offset); 2202 offset += 2u; 2203 2204 conn = hci_connection_for_handle(handle); 2205 if (!conn){ 2206 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2207 continue; 2208 } 2209 2210 if (conn->num_packets_sent >= num_packets){ 2211 conn->num_packets_sent -= num_packets; 2212 } else { 2213 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2214 conn->num_packets_sent = 0; 2215 } 2216 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2217 2218 #ifdef ENABLE_CLASSIC 2219 // For SCO, we do the can_send_now_check here 2220 hci_notify_if_sco_can_send_now(); 2221 #endif 2222 } 2223 break; 2224 } 2225 2226 #ifdef ENABLE_CLASSIC 2227 case HCI_EVENT_INQUIRY_COMPLETE: 2228 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2229 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2230 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2231 hci_emit_event(event, sizeof(event), 1); 2232 } 2233 break; 2234 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2235 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2236 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2237 } 2238 break; 2239 case HCI_EVENT_CONNECTION_REQUEST: 2240 reverse_bd_addr(&packet[2], addr); 2241 if (hci_stack->gap_classic_accept_callback != NULL){ 2242 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2243 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2244 bd_addr_copy(hci_stack->decline_addr, addr); 2245 break; 2246 } 2247 } 2248 2249 // TODO: eval COD 8-10 2250 link_type = packet[11]; 2251 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2252 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2253 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2254 if (!conn) { 2255 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2256 } 2257 if (!conn) { 2258 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2259 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2260 bd_addr_copy(hci_stack->decline_addr, addr); 2261 break; 2262 } 2263 conn->role = HCI_ROLE_SLAVE; 2264 conn->state = RECEIVED_CONNECTION_REQUEST; 2265 // store info about eSCO 2266 if (link_type == 0x02){ 2267 conn->remote_supported_features[0] |= 1; 2268 } 2269 hci_run(); 2270 break; 2271 2272 case HCI_EVENT_CONNECTION_COMPLETE: 2273 // Connection management 2274 reverse_bd_addr(&packet[5], addr); 2275 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2276 addr_type = BD_ADDR_TYPE_ACL; 2277 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2278 if (conn) { 2279 if (!packet[2]){ 2280 conn->state = OPEN; 2281 conn->con_handle = little_endian_read_16(packet, 3); 2282 2283 // queue get remote feature 2284 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2285 2286 // queue set supervision timeout if we're master 2287 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2288 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2289 } 2290 2291 // restart timer 2292 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2293 btstack_run_loop_add_timer(&conn->timeout); 2294 2295 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2296 2297 hci_emit_nr_connections_changed(); 2298 } else { 2299 // connection failed 2300 hci_handle_connection_failed(conn, packet[2]); 2301 } 2302 } 2303 break; 2304 2305 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2306 reverse_bd_addr(&packet[5], addr); 2307 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2308 if (packet[2]){ 2309 // connection failed 2310 break; 2311 } 2312 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2313 if (!conn) { 2314 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2315 } 2316 if (!conn) { 2317 break; 2318 } 2319 conn->state = OPEN; 2320 conn->con_handle = little_endian_read_16(packet, 3); 2321 2322 #ifdef ENABLE_SCO_OVER_HCI 2323 // update SCO 2324 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2325 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2326 } 2327 // trigger can send now 2328 if (hci_have_usb_transport()){ 2329 hci_stack->sco_can_send_now = 1; 2330 } 2331 #endif 2332 break; 2333 2334 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2335 handle = little_endian_read_16(packet, 3); 2336 conn = hci_connection_for_handle(handle); 2337 if (!conn) break; 2338 if (!packet[2]){ 2339 const uint8_t * features = &packet[5]; 2340 hci_handle_remote_features_page_0(conn, features); 2341 2342 // read extended features if possible 2343 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2344 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2345 break; 2346 } 2347 } 2348 hci_handle_remote_features_received(conn); 2349 break; 2350 2351 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2352 handle = little_endian_read_16(packet, 3); 2353 conn = hci_connection_for_handle(handle); 2354 if (!conn) break; 2355 // status = ok, page = 1 2356 if (!packet[2]) { 2357 uint8_t page_number = packet[5]; 2358 uint8_t maximum_page_number = packet[6]; 2359 const uint8_t * features = &packet[7]; 2360 bool done = false; 2361 switch (page_number){ 2362 case 1: 2363 hci_handle_remote_features_page_1(conn, features); 2364 if (maximum_page_number >= 2){ 2365 // get Secure Connections (Controller) from Page 2 if available 2366 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2367 } else { 2368 // otherwise, assume SC (Controller) == SC (Host) 2369 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2370 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2371 } 2372 done = true; 2373 } 2374 break; 2375 case 2: 2376 hci_handle_remote_features_page_2(conn, features); 2377 done = true; 2378 break; 2379 default: 2380 break; 2381 } 2382 if (!done) break; 2383 } 2384 hci_handle_remote_features_received(conn); 2385 break; 2386 2387 case HCI_EVENT_LINK_KEY_REQUEST: 2388 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2389 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2390 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2391 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2392 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2393 hci_run(); 2394 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2395 return; 2396 2397 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2398 reverse_bd_addr(&packet[2], addr); 2399 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2400 if (!conn) break; 2401 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2402 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2403 // Change Connection Encryption keeps link key type 2404 if (link_key_type != CHANGED_COMBINATION_KEY){ 2405 conn->link_key_type = link_key_type; 2406 } 2407 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2408 // still forward event to allow dismiss of pairing dialog 2409 break; 2410 } 2411 2412 case HCI_EVENT_PIN_CODE_REQUEST: 2413 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2414 // non-bondable mode: pin code negative reply will be sent 2415 if (!hci_stack->bondable){ 2416 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2417 hci_run(); 2418 return; 2419 } 2420 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2421 if (!hci_stack->link_key_db) break; 2422 hci_event_pin_code_request_get_bd_addr(packet, addr); 2423 hci_stack->link_key_db->delete_link_key(addr); 2424 break; 2425 2426 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2427 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2428 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2429 break; 2430 2431 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2432 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2433 if (!hci_stack->ssp_auto_accept) break; 2434 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2435 break; 2436 2437 case HCI_EVENT_USER_PASSKEY_REQUEST: 2438 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2439 if (!hci_stack->ssp_auto_accept) break; 2440 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2441 break; 2442 case HCI_EVENT_MODE_CHANGE: 2443 handle = hci_event_mode_change_get_handle(packet); 2444 conn = hci_connection_for_handle(handle); 2445 if (!conn) break; 2446 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2447 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2448 break; 2449 #endif 2450 2451 case HCI_EVENT_ENCRYPTION_CHANGE: 2452 handle = hci_event_encryption_change_get_connection_handle(packet); 2453 conn = hci_connection_for_handle(handle); 2454 if (!conn) break; 2455 if (hci_event_encryption_change_get_status(packet) == 0u) { 2456 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2457 if (encryption_enabled){ 2458 if (hci_is_le_connection(conn)){ 2459 // For LE, we accept connection as encrypted 2460 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2461 } 2462 #ifdef ENABLE_CLASSIC 2463 else { 2464 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2465 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2466 bool connected_uses_aes_ccm = encryption_enabled == 2; 2467 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2468 log_info("SC during pairing, but only E0 now -> abort"); 2469 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2470 break; 2471 } 2472 2473 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2474 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2475 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2476 } else { 2477 // if not, pretend everything is perfect 2478 hci_handle_read_encryption_key_size_complete(conn, 16); 2479 } 2480 } 2481 #endif 2482 } else { 2483 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2484 } 2485 } 2486 2487 break; 2488 2489 #ifdef ENABLE_CLASSIC 2490 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2491 handle = hci_event_authentication_complete_get_connection_handle(packet); 2492 conn = hci_connection_for_handle(handle); 2493 if (!conn) break; 2494 2495 // ignore authentication event if we didn't request it 2496 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2497 2498 // dedicated bonding: send result and disconnect 2499 if (conn->bonding_flags & BONDING_DEDICATED){ 2500 conn->bonding_flags &= ~BONDING_DEDICATED; 2501 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2502 conn->bonding_status = packet[2]; 2503 break; 2504 } 2505 2506 // authenticated only if auth status == 0 2507 if (hci_event_authentication_complete_get_status(packet) == 0){ 2508 // authenticated 2509 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2510 2511 // If link key sufficient for requested security and not already encrypted, start encryption 2512 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2513 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2514 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2515 break; 2516 } 2517 } 2518 2519 // emit updated security level 2520 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2521 break; 2522 #endif 2523 2524 // HCI_EVENT_DISCONNECTION_COMPLETE 2525 // has been split, to first notify stack before shutting connection down 2526 // see end of function, too. 2527 case HCI_EVENT_DISCONNECTION_COMPLETE: 2528 if (packet[2]) break; // status != 0 2529 handle = little_endian_read_16(packet, 3); 2530 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2531 if (hci_stack->acl_fragmentation_total_size > 0u) { 2532 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2533 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2534 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2535 hci_stack->acl_fragmentation_total_size = 0; 2536 hci_stack->acl_fragmentation_pos = 0; 2537 if (release_buffer){ 2538 hci_release_packet_buffer(); 2539 } 2540 } 2541 } 2542 2543 conn = hci_connection_for_handle(handle); 2544 if (!conn) break; 2545 // mark connection for shutdown 2546 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2547 2548 // emit dedicatd bonding event 2549 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2550 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2551 } 2552 2553 #ifdef ENABLE_BLE 2554 #ifdef ENABLE_LE_PERIPHERAL 2555 // re-enable advertisements for le connections if active 2556 if (hci_is_le_connection(conn)){ 2557 hci_reenable_advertisements_if_needed(); 2558 } 2559 #endif 2560 #endif 2561 break; 2562 2563 case HCI_EVENT_HARDWARE_ERROR: 2564 log_error("Hardware Error: 0x%02x", packet[2]); 2565 if (hci_stack->hardware_error_callback){ 2566 (*hci_stack->hardware_error_callback)(packet[2]); 2567 } else { 2568 // if no special requests, just reboot stack 2569 hci_power_control_off(); 2570 hci_power_control_on(); 2571 } 2572 break; 2573 2574 #ifdef ENABLE_CLASSIC 2575 case HCI_EVENT_ROLE_CHANGE: 2576 if (packet[2]) break; // status != 0 2577 reverse_bd_addr(&packet[3], addr); 2578 addr_type = BD_ADDR_TYPE_ACL; 2579 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2580 if (!conn) break; 2581 conn->role = packet[9]; 2582 break; 2583 #endif 2584 2585 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2586 // release packet buffer only for asynchronous transport and if there are not further fragements 2587 if (hci_transport_synchronous()) { 2588 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2589 return; // instead of break: to avoid re-entering hci_run() 2590 } 2591 hci_stack->acl_fragmentation_tx_active = 0; 2592 if (hci_stack->acl_fragmentation_total_size) break; 2593 hci_release_packet_buffer(); 2594 2595 // L2CAP receives this event via the hci_emit_event below 2596 2597 #ifdef ENABLE_CLASSIC 2598 // For SCO, we do the can_send_now_check here 2599 hci_notify_if_sco_can_send_now(); 2600 #endif 2601 break; 2602 2603 #ifdef ENABLE_CLASSIC 2604 case HCI_EVENT_SCO_CAN_SEND_NOW: 2605 // For SCO, we do the can_send_now_check here 2606 hci_stack->sco_can_send_now = 1; 2607 hci_notify_if_sco_can_send_now(); 2608 return; 2609 2610 // explode inquriy results for easier consumption 2611 case HCI_EVENT_INQUIRY_RESULT: 2612 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2613 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2614 gap_inquiry_explode(packet, size); 2615 break; 2616 #endif 2617 2618 #ifdef ENABLE_BLE 2619 case HCI_EVENT_LE_META: 2620 switch (packet[2]){ 2621 #ifdef ENABLE_LE_CENTRAL 2622 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2623 // log_info("advertising report received"); 2624 if (!hci_stack->le_scanning_enabled) break; 2625 le_handle_advertisement_report(packet, size); 2626 break; 2627 #endif 2628 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2629 // Connection management 2630 reverse_bd_addr(&packet[8], addr); 2631 addr_type = (bd_addr_type_t)packet[7]; 2632 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2633 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2634 2635 #ifdef ENABLE_LE_CENTRAL 2636 // if auto-connect, remove from whitelist in both roles 2637 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2638 hci_remove_from_whitelist(addr_type, addr); 2639 } 2640 // handle error: error is reported only to the initiator -> outgoing connection 2641 if (packet[3]){ 2642 2643 // handle cancelled outgoing connection 2644 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2645 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2646 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2647 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2648 conn = gap_get_outgoing_connection(); 2649 } 2650 2651 // outgoing connection establishment is done 2652 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2653 // remove entry 2654 if (conn){ 2655 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2656 btstack_memory_hci_connection_free( conn ); 2657 } 2658 break; 2659 } 2660 #endif 2661 // on success, both hosts receive connection complete event 2662 if (packet[6] == HCI_ROLE_MASTER){ 2663 #ifdef ENABLE_LE_CENTRAL 2664 // if we're master, it was an outgoing connection and we're done with it 2665 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2666 #endif 2667 } else { 2668 #ifdef ENABLE_LE_PERIPHERAL 2669 // if we're slave, it was an incoming connection, advertisements have stopped 2670 hci_stack->le_advertisements_active = 0; 2671 #endif 2672 } 2673 // LE connections are auto-accepted, so just create a connection if there isn't one already 2674 if (!conn){ 2675 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2676 } 2677 // no memory, sorry. 2678 if (!conn){ 2679 break; 2680 } 2681 2682 conn->state = OPEN; 2683 conn->role = packet[6]; 2684 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2685 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2686 2687 #ifdef ENABLE_LE_PERIPHERAL 2688 if (packet[6] == HCI_ROLE_SLAVE){ 2689 hci_reenable_advertisements_if_needed(); 2690 } 2691 #endif 2692 2693 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2694 2695 // restart timer 2696 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2697 // btstack_run_loop_add_timer(&conn->timeout); 2698 2699 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2700 2701 hci_emit_nr_connections_changed(); 2702 break; 2703 2704 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2705 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2706 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2707 conn = hci_connection_for_handle(handle); 2708 if (!conn) break; 2709 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2710 break; 2711 2712 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2713 // connection 2714 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2715 conn = hci_connection_for_handle(handle); 2716 if (conn) { 2717 // read arguments 2718 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2719 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2720 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2721 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2722 2723 // validate against current connection parameter range 2724 le_connection_parameter_range_t existing_range; 2725 gap_get_connection_parameter_range(&existing_range); 2726 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2727 if (update_parameter){ 2728 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2729 conn->le_conn_interval_min = le_conn_interval_min; 2730 conn->le_conn_interval_max = le_conn_interval_max; 2731 conn->le_conn_latency = le_conn_latency; 2732 conn->le_supervision_timeout = le_supervision_timeout; 2733 } else { 2734 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2735 } 2736 } 2737 break; 2738 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2739 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2740 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2741 conn = hci_connection_for_handle(handle); 2742 if (conn) { 2743 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2744 } 2745 break; 2746 #endif 2747 default: 2748 break; 2749 } 2750 break; 2751 #endif 2752 case HCI_EVENT_VENDOR_SPECIFIC: 2753 // Vendor specific commands often create vendor specific event instead of num completed packets 2754 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2755 switch (hci_stack->manufacturer){ 2756 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2757 hci_stack->num_cmd_packets = 1; 2758 break; 2759 default: 2760 break; 2761 } 2762 break; 2763 default: 2764 break; 2765 } 2766 2767 handle_event_for_current_stack_state(packet, size); 2768 2769 // notify upper stack 2770 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2771 2772 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2773 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2774 if (!packet[2]){ 2775 handle = little_endian_read_16(packet, 3); 2776 hci_connection_t * aConn = hci_connection_for_handle(handle); 2777 if (aConn) { 2778 // discard connection if app did not trigger a reconnect in the event handler 2779 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2780 hci_shutdown_connection(aConn); 2781 } 2782 } 2783 } 2784 } 2785 2786 // execute main loop 2787 hci_run(); 2788 } 2789 2790 #ifdef ENABLE_CLASSIC 2791 2792 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2793 static void sco_schedule_tx(hci_connection_t * conn); 2794 2795 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2796 log_debug("SCO TX Timeout"); 2797 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2798 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2799 if (!conn) return; 2800 2801 // trigger send 2802 conn->sco_tx_ready = 1; 2803 // extra packet if CVSD but SCO buffer is too short 2804 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2805 conn->sco_tx_ready++; 2806 } 2807 hci_notify_if_sco_can_send_now(); 2808 } 2809 2810 2811 #define SCO_TX_AFTER_RX_MS (6) 2812 2813 static void sco_schedule_tx(hci_connection_t * conn){ 2814 2815 uint32_t now = btstack_run_loop_get_time_ms(); 2816 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2817 int time_delta_ms = sco_tx_ms - now; 2818 2819 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2820 2821 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2822 btstack_run_loop_set_timer(timer, time_delta_ms); 2823 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2824 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2825 btstack_run_loop_add_timer(timer); 2826 } 2827 2828 static void sco_handler(uint8_t * packet, uint16_t size){ 2829 // lookup connection struct 2830 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2831 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2832 if (!conn) return; 2833 2834 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2835 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2836 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2837 packet[2] = 0x3c; 2838 memmove(&packet[3], &packet[23], 63); 2839 size = 63; 2840 } 2841 } 2842 2843 if (hci_have_usb_transport()){ 2844 // Nothing to do 2845 } else { 2846 // 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); 2847 if (hci_stack->synchronous_flow_control_enabled == 0){ 2848 uint32_t now = btstack_run_loop_get_time_ms(); 2849 2850 if (!conn->sco_rx_valid){ 2851 // ignore first 10 packets 2852 conn->sco_rx_count++; 2853 // log_debug("sco rx count %u", conn->sco_rx_count); 2854 if (conn->sco_rx_count == 10) { 2855 // use first timestamp as is and pretent it just started 2856 conn->sco_rx_ms = now; 2857 conn->sco_rx_valid = 1; 2858 conn->sco_rx_count = 0; 2859 sco_schedule_tx(conn); 2860 } 2861 } else { 2862 // track expected arrival timme 2863 conn->sco_rx_count++; 2864 conn->sco_rx_ms += 7; 2865 int delta = (int32_t) (now - conn->sco_rx_ms); 2866 if (delta > 0){ 2867 conn->sco_rx_ms++; 2868 } 2869 // log_debug("sco rx %u", conn->sco_rx_ms); 2870 sco_schedule_tx(conn); 2871 } 2872 } 2873 } 2874 // deliver to app 2875 if (hci_stack->sco_packet_handler) { 2876 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2877 } 2878 2879 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2880 conn->num_packets_completed++; 2881 hci_stack->host_completed_packets = 1; 2882 hci_run(); 2883 #endif 2884 } 2885 #endif 2886 2887 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2888 hci_dump_packet(packet_type, 1, packet, size); 2889 switch (packet_type) { 2890 case HCI_EVENT_PACKET: 2891 event_handler(packet, size); 2892 break; 2893 case HCI_ACL_DATA_PACKET: 2894 acl_handler(packet, size); 2895 break; 2896 #ifdef ENABLE_CLASSIC 2897 case HCI_SCO_DATA_PACKET: 2898 sco_handler(packet, size); 2899 break; 2900 #endif 2901 default: 2902 break; 2903 } 2904 } 2905 2906 /** 2907 * @brief Add event packet handler. 2908 */ 2909 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2910 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2911 } 2912 2913 2914 /** Register HCI packet handlers */ 2915 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2916 hci_stack->acl_packet_handler = handler; 2917 } 2918 2919 #ifdef ENABLE_CLASSIC 2920 /** 2921 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2922 */ 2923 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2924 hci_stack->sco_packet_handler = handler; 2925 } 2926 #endif 2927 2928 static void hci_state_reset(void){ 2929 // no connections yet 2930 hci_stack->connections = NULL; 2931 2932 // keep discoverable/connectable as this has been requested by the client(s) 2933 // hci_stack->discoverable = 0; 2934 // hci_stack->connectable = 0; 2935 // hci_stack->bondable = 1; 2936 // hci_stack->own_addr_type = 0; 2937 2938 // buffer is free 2939 hci_stack->hci_packet_buffer_reserved = 0; 2940 2941 // no pending cmds 2942 hci_stack->decline_reason = 0; 2943 hci_stack->new_scan_enable_value = 0xff; 2944 2945 // LE 2946 #ifdef ENABLE_BLE 2947 memset(hci_stack->le_random_address, 0, 6); 2948 hci_stack->le_random_address_set = 0; 2949 #endif 2950 #ifdef ENABLE_LE_CENTRAL 2951 hci_stack->le_scanning_active = 0; 2952 hci_stack->le_scan_type = 0xff; 2953 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2954 hci_stack->le_whitelist = 0; 2955 hci_stack->le_whitelist_capacity = 0; 2956 #endif 2957 } 2958 2959 #ifdef ENABLE_CLASSIC 2960 /** 2961 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2962 */ 2963 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2964 // store and open remote device db 2965 hci_stack->link_key_db = link_key_db; 2966 if (hci_stack->link_key_db) { 2967 hci_stack->link_key_db->open(); 2968 } 2969 } 2970 #endif 2971 2972 void hci_init(const hci_transport_t *transport, const void *config){ 2973 2974 #ifdef HAVE_MALLOC 2975 if (!hci_stack) { 2976 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2977 } 2978 #else 2979 hci_stack = &hci_stack_static; 2980 #endif 2981 memset(hci_stack, 0, sizeof(hci_stack_t)); 2982 2983 // reference to use transport layer implementation 2984 hci_stack->hci_transport = transport; 2985 2986 // reference to used config 2987 hci_stack->config = config; 2988 2989 // setup pointer for outgoing packet buffer 2990 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2991 2992 // max acl payload size defined in config.h 2993 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2994 2995 // register packet handlers with transport 2996 transport->register_packet_handler(&packet_handler); 2997 2998 hci_stack->state = HCI_STATE_OFF; 2999 3000 // class of device 3001 hci_stack->class_of_device = 0x007a020c; // Smartphone 3002 3003 // bondable by default 3004 hci_stack->bondable = 1; 3005 3006 #ifdef ENABLE_CLASSIC 3007 // classic name 3008 hci_stack->local_name = default_classic_name; 3009 3010 // Master slave policy 3011 hci_stack->master_slave_policy = 1; 3012 3013 // Allow Role Switch 3014 hci_stack->allow_role_switch = 1; 3015 3016 // Default / minimum security level = 2 3017 hci_stack->gap_security_level = LEVEL_2; 3018 3019 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3020 hci_stack->gap_required_encyrption_key_size = 7; 3021 #endif 3022 3023 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3024 hci_stack->ssp_enable = 1; 3025 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3026 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3027 hci_stack->ssp_auto_accept = 1; 3028 3029 // Secure Connections: enable (requires support from Controller) 3030 hci_stack->secure_connections_enable = true; 3031 3032 // voice setting - signed 16 bit pcm data with CVSD over the air 3033 hci_stack->sco_voice_setting = 0x60; 3034 3035 #ifdef ENABLE_LE_CENTRAL 3036 // connection parameter to use for outgoing connections 3037 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3038 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3039 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3040 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3041 hci_stack->le_connection_latency = 4; // 4 3042 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3043 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3044 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3045 3046 // default LE Scanning 3047 hci_stack->le_scan_interval = 0x1e0; 3048 hci_stack->le_scan_window = 0x30; 3049 #endif 3050 3051 #ifdef ENABLE_LE_PERIPHERAL 3052 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3053 #endif 3054 3055 // connection parameter range used to answer connection parameter update requests in l2cap 3056 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3057 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3058 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3059 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3060 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3061 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3062 3063 hci_state_reset(); 3064 } 3065 3066 /** 3067 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3068 */ 3069 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3070 hci_stack->chipset = chipset_driver; 3071 3072 // reset chipset driver - init is also called on power_up 3073 if (hci_stack->chipset && hci_stack->chipset->init){ 3074 hci_stack->chipset->init(hci_stack->config); 3075 } 3076 } 3077 3078 /** 3079 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3080 */ 3081 void hci_set_control(const btstack_control_t *hardware_control){ 3082 // references to used control implementation 3083 hci_stack->control = hardware_control; 3084 // init with transport config 3085 hardware_control->init(hci_stack->config); 3086 } 3087 3088 void hci_close(void){ 3089 // close remote device db 3090 if (hci_stack->link_key_db) { 3091 hci_stack->link_key_db->close(); 3092 } 3093 3094 btstack_linked_list_iterator_t lit; 3095 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3096 while (btstack_linked_list_iterator_has_next(&lit)){ 3097 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3098 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3099 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3100 hci_shutdown_connection(connection); 3101 } 3102 3103 hci_power_control(HCI_POWER_OFF); 3104 3105 #ifdef HAVE_MALLOC 3106 free(hci_stack); 3107 #endif 3108 hci_stack = NULL; 3109 } 3110 3111 #ifdef ENABLE_CLASSIC 3112 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3113 // validate ranage and set 3114 if (encryption_key_size < 7) return; 3115 if (encryption_key_size > 16) return; 3116 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3117 } 3118 3119 void gap_set_security_level(gap_security_level_t security_level){ 3120 hci_stack->gap_security_level = security_level; 3121 } 3122 3123 gap_security_level_t gap_get_security_level(void){ 3124 return hci_stack->gap_security_level; 3125 } 3126 #endif 3127 3128 #ifdef ENABLE_CLASSIC 3129 void gap_set_class_of_device(uint32_t class_of_device){ 3130 hci_stack->class_of_device = class_of_device; 3131 } 3132 3133 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3134 hci_stack->default_link_policy_settings = default_link_policy_settings; 3135 } 3136 3137 void gap_set_allow_role_switch(bool allow_role_switch){ 3138 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3139 } 3140 3141 uint8_t hci_get_allow_role_switch(void){ 3142 return hci_stack->allow_role_switch; 3143 } 3144 3145 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3146 hci_stack->link_supervision_timeout = link_supervision_timeout; 3147 } 3148 3149 void hci_disable_l2cap_timeout_check(void){ 3150 disable_l2cap_timeouts = 1; 3151 } 3152 #endif 3153 3154 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3155 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3156 void hci_set_bd_addr(bd_addr_t addr){ 3157 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3158 hci_stack->custom_bd_addr_set = 1; 3159 } 3160 #endif 3161 3162 // State-Module-Driver overview 3163 // state module low-level 3164 // HCI_STATE_OFF off close 3165 // HCI_STATE_INITIALIZING, on open 3166 // HCI_STATE_WORKING, on open 3167 // HCI_STATE_HALTING, on open 3168 // HCI_STATE_SLEEPING, off/sleep close 3169 // HCI_STATE_FALLING_ASLEEP on open 3170 3171 static int hci_power_control_on(void){ 3172 3173 // power on 3174 int err = 0; 3175 if (hci_stack->control && hci_stack->control->on){ 3176 err = (*hci_stack->control->on)(); 3177 } 3178 if (err){ 3179 log_error( "POWER_ON failed"); 3180 hci_emit_hci_open_failed(); 3181 return err; 3182 } 3183 3184 // int chipset driver 3185 if (hci_stack->chipset && hci_stack->chipset->init){ 3186 hci_stack->chipset->init(hci_stack->config); 3187 } 3188 3189 // init transport 3190 if (hci_stack->hci_transport->init){ 3191 hci_stack->hci_transport->init(hci_stack->config); 3192 } 3193 3194 // open transport 3195 err = hci_stack->hci_transport->open(); 3196 if (err){ 3197 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3198 if (hci_stack->control && hci_stack->control->off){ 3199 (*hci_stack->control->off)(); 3200 } 3201 hci_emit_hci_open_failed(); 3202 return err; 3203 } 3204 return 0; 3205 } 3206 3207 static void hci_power_control_off(void){ 3208 3209 log_info("hci_power_control_off"); 3210 3211 // close low-level device 3212 hci_stack->hci_transport->close(); 3213 3214 log_info("hci_power_control_off - hci_transport closed"); 3215 3216 // power off 3217 if (hci_stack->control && hci_stack->control->off){ 3218 (*hci_stack->control->off)(); 3219 } 3220 3221 log_info("hci_power_control_off - control closed"); 3222 3223 hci_stack->state = HCI_STATE_OFF; 3224 } 3225 3226 static void hci_power_control_sleep(void){ 3227 3228 log_info("hci_power_control_sleep"); 3229 3230 #if 0 3231 // don't close serial port during sleep 3232 3233 // close low-level device 3234 hci_stack->hci_transport->close(hci_stack->config); 3235 #endif 3236 3237 // sleep mode 3238 if (hci_stack->control && hci_stack->control->sleep){ 3239 (*hci_stack->control->sleep)(); 3240 } 3241 3242 hci_stack->state = HCI_STATE_SLEEPING; 3243 } 3244 3245 static int hci_power_control_wake(void){ 3246 3247 log_info("hci_power_control_wake"); 3248 3249 // wake on 3250 if (hci_stack->control && hci_stack->control->wake){ 3251 (*hci_stack->control->wake)(); 3252 } 3253 3254 #if 0 3255 // open low-level device 3256 int err = hci_stack->hci_transport->open(hci_stack->config); 3257 if (err){ 3258 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3259 if (hci_stack->control && hci_stack->control->off){ 3260 (*hci_stack->control->off)(); 3261 } 3262 hci_emit_hci_open_failed(); 3263 return err; 3264 } 3265 #endif 3266 3267 return 0; 3268 } 3269 3270 static void hci_power_transition_to_initializing(void){ 3271 // set up state machine 3272 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3273 hci_stack->hci_packet_buffer_reserved = 0; 3274 hci_stack->state = HCI_STATE_INITIALIZING; 3275 hci_stack->substate = HCI_INIT_SEND_RESET; 3276 } 3277 3278 int hci_power_control(HCI_POWER_MODE power_mode){ 3279 3280 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3281 3282 int err = 0; 3283 switch (hci_stack->state){ 3284 3285 case HCI_STATE_OFF: 3286 switch (power_mode){ 3287 case HCI_POWER_ON: 3288 err = hci_power_control_on(); 3289 if (err) { 3290 log_error("hci_power_control_on() error %d", err); 3291 return err; 3292 } 3293 hci_power_transition_to_initializing(); 3294 break; 3295 case HCI_POWER_OFF: 3296 // do nothing 3297 break; 3298 case HCI_POWER_SLEEP: 3299 // do nothing (with SLEEP == OFF) 3300 break; 3301 } 3302 break; 3303 3304 case HCI_STATE_INITIALIZING: 3305 switch (power_mode){ 3306 case HCI_POWER_ON: 3307 // do nothing 3308 break; 3309 case HCI_POWER_OFF: 3310 // no connections yet, just turn it off 3311 hci_power_control_off(); 3312 break; 3313 case HCI_POWER_SLEEP: 3314 // no connections yet, just turn it off 3315 hci_power_control_sleep(); 3316 break; 3317 } 3318 break; 3319 3320 case HCI_STATE_WORKING: 3321 switch (power_mode){ 3322 case HCI_POWER_ON: 3323 // do nothing 3324 break; 3325 case HCI_POWER_OFF: 3326 // see hci_run 3327 hci_stack->state = HCI_STATE_HALTING; 3328 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3329 break; 3330 case HCI_POWER_SLEEP: 3331 // see hci_run 3332 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3333 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3334 break; 3335 } 3336 break; 3337 3338 case HCI_STATE_HALTING: 3339 switch (power_mode){ 3340 case HCI_POWER_ON: 3341 hci_power_transition_to_initializing(); 3342 break; 3343 case HCI_POWER_OFF: 3344 // do nothing 3345 break; 3346 case HCI_POWER_SLEEP: 3347 // see hci_run 3348 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3349 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3350 break; 3351 } 3352 break; 3353 3354 case HCI_STATE_FALLING_ASLEEP: 3355 switch (power_mode){ 3356 case HCI_POWER_ON: 3357 3358 #ifdef HAVE_PLATFORM_IPHONE_OS 3359 // nothing to do, if H4 supports power management 3360 if (btstack_control_iphone_power_management_enabled()){ 3361 hci_stack->state = HCI_STATE_INITIALIZING; 3362 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3363 break; 3364 } 3365 #endif 3366 hci_power_transition_to_initializing(); 3367 break; 3368 case HCI_POWER_OFF: 3369 // see hci_run 3370 hci_stack->state = HCI_STATE_HALTING; 3371 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3372 break; 3373 case HCI_POWER_SLEEP: 3374 // do nothing 3375 break; 3376 } 3377 break; 3378 3379 case HCI_STATE_SLEEPING: 3380 switch (power_mode){ 3381 case HCI_POWER_ON: 3382 3383 #ifdef HAVE_PLATFORM_IPHONE_OS 3384 // nothing to do, if H4 supports power management 3385 if (btstack_control_iphone_power_management_enabled()){ 3386 hci_stack->state = HCI_STATE_INITIALIZING; 3387 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3388 hci_update_scan_enable(); 3389 break; 3390 } 3391 #endif 3392 err = hci_power_control_wake(); 3393 if (err) return err; 3394 hci_power_transition_to_initializing(); 3395 break; 3396 case HCI_POWER_OFF: 3397 hci_stack->state = HCI_STATE_HALTING; 3398 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3399 break; 3400 case HCI_POWER_SLEEP: 3401 // do nothing 3402 break; 3403 } 3404 break; 3405 } 3406 3407 // create internal event 3408 hci_emit_state(); 3409 3410 // trigger next/first action 3411 hci_run(); 3412 3413 return 0; 3414 } 3415 3416 3417 #ifdef ENABLE_CLASSIC 3418 3419 static void hci_update_scan_enable(void){ 3420 // 2 = page scan, 1 = inq scan 3421 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3422 hci_run(); 3423 } 3424 3425 void gap_discoverable_control(uint8_t enable){ 3426 if (enable) enable = 1; // normalize argument 3427 3428 if (hci_stack->discoverable == enable){ 3429 hci_emit_discoverable_enabled(hci_stack->discoverable); 3430 return; 3431 } 3432 3433 hci_stack->discoverable = enable; 3434 hci_update_scan_enable(); 3435 } 3436 3437 void gap_connectable_control(uint8_t enable){ 3438 if (enable) enable = 1; // normalize argument 3439 3440 // don't emit event 3441 if (hci_stack->connectable == enable) return; 3442 3443 hci_stack->connectable = enable; 3444 hci_update_scan_enable(); 3445 } 3446 #endif 3447 3448 void gap_local_bd_addr(bd_addr_t address_buffer){ 3449 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3450 } 3451 3452 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3453 static void hci_host_num_completed_packets(void){ 3454 3455 // create packet manually as arrays are not supported and num_commands should not get reduced 3456 hci_reserve_packet_buffer(); 3457 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3458 3459 uint16_t size = 0; 3460 uint16_t num_handles = 0; 3461 packet[size++] = 0x35; 3462 packet[size++] = 0x0c; 3463 size++; // skip param len 3464 size++; // skip num handles 3465 3466 // add { handle, packets } entries 3467 btstack_linked_item_t * it; 3468 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3469 hci_connection_t * connection = (hci_connection_t *) it; 3470 if (connection->num_packets_completed){ 3471 little_endian_store_16(packet, size, connection->con_handle); 3472 size += 2; 3473 little_endian_store_16(packet, size, connection->num_packets_completed); 3474 size += 2; 3475 // 3476 num_handles++; 3477 connection->num_packets_completed = 0; 3478 } 3479 } 3480 3481 packet[2] = size - 3; 3482 packet[3] = num_handles; 3483 3484 hci_stack->host_completed_packets = 0; 3485 3486 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3487 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3488 3489 // release packet buffer for synchronous transport implementations 3490 if (hci_transport_synchronous()){ 3491 hci_release_packet_buffer(); 3492 hci_emit_transport_packet_sent(); 3493 } 3494 } 3495 #endif 3496 3497 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3498 UNUSED(ds); 3499 hci_stack->substate = HCI_HALTING_CLOSE; 3500 // allow packet handlers to defer final shutdown 3501 hci_emit_state(); 3502 hci_run(); 3503 } 3504 3505 static bool hci_run_acl_fragments(void){ 3506 if (hci_stack->acl_fragmentation_total_size > 0u) { 3507 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3508 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3509 if (connection) { 3510 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3511 hci_send_acl_packet_fragments(connection); 3512 return true; 3513 } 3514 } else { 3515 // connection gone -> discard further fragments 3516 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3517 hci_stack->acl_fragmentation_total_size = 0; 3518 hci_stack->acl_fragmentation_pos = 0; 3519 } 3520 } 3521 return false; 3522 } 3523 3524 #ifdef ENABLE_CLASSIC 3525 static bool hci_run_general_gap_classic(void){ 3526 3527 // decline incoming connections 3528 if (hci_stack->decline_reason){ 3529 uint8_t reason = hci_stack->decline_reason; 3530 hci_stack->decline_reason = 0; 3531 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3532 return true; 3533 } 3534 // send scan enable 3535 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3536 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3537 hci_stack->new_scan_enable_value = 0xff; 3538 return true; 3539 } 3540 // start/stop inquiry 3541 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3542 uint8_t duration = hci_stack->inquiry_state; 3543 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3544 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3545 return true; 3546 } 3547 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3548 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3549 hci_send_cmd(&hci_inquiry_cancel); 3550 return true; 3551 } 3552 // remote name request 3553 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3554 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3555 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3556 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3557 return true; 3558 } 3559 // pairing 3560 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3561 uint8_t state = hci_stack->gap_pairing_state; 3562 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3563 switch (state){ 3564 case GAP_PAIRING_STATE_SEND_PIN: 3565 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); 3566 break; 3567 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3568 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3569 break; 3570 case GAP_PAIRING_STATE_SEND_PASSKEY: 3571 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3572 break; 3573 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3574 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3575 break; 3576 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3577 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3578 break; 3579 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3580 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3581 break; 3582 default: 3583 break; 3584 } 3585 return true; 3586 } 3587 return false; 3588 } 3589 #endif 3590 3591 #ifdef ENABLE_BLE 3592 static bool hci_run_general_gap_le(void){ 3593 3594 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3595 3596 if (hci_stack->state != HCI_STATE_WORKING) return false; 3597 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3598 3599 #ifdef ENABLE_LE_CENTRAL 3600 // parameter change requires scanning to be stopped first 3601 if (hci_stack->le_scan_type != 0xffu) { 3602 if (hci_stack->le_scanning_active){ 3603 hci_stack->le_scanning_active = 0; 3604 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3605 } else { 3606 int scan_type = (int) hci_stack->le_scan_type; 3607 hci_stack->le_scan_type = 0xff; 3608 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); 3609 } 3610 return true; 3611 } 3612 // finally, we can enable/disable le scan 3613 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3614 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3615 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3616 return true; 3617 } 3618 #endif 3619 #ifdef ENABLE_LE_PERIPHERAL 3620 // le advertisement control 3621 if (hci_stack->le_advertisements_todo){ 3622 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3623 } 3624 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3625 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3626 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3627 return true; 3628 } 3629 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3630 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3631 hci_send_cmd(&hci_le_set_advertising_parameters, 3632 hci_stack->le_advertisements_interval_min, 3633 hci_stack->le_advertisements_interval_max, 3634 hci_stack->le_advertisements_type, 3635 hci_stack->le_own_addr_type, 3636 hci_stack->le_advertisements_direct_address_type, 3637 hci_stack->le_advertisements_direct_address, 3638 hci_stack->le_advertisements_channel_map, 3639 hci_stack->le_advertisements_filter_policy); 3640 return true; 3641 } 3642 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3643 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3644 uint8_t adv_data_clean[31]; 3645 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3646 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3647 hci_stack->le_advertisements_data_len); 3648 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3649 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3650 return true; 3651 } 3652 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3653 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3654 uint8_t scan_data_clean[31]; 3655 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3656 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3657 hci_stack->le_scan_response_data_len); 3658 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3659 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3660 return true; 3661 } 3662 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3663 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3664 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3665 return true; 3666 } 3667 #endif 3668 3669 #ifdef ENABLE_LE_CENTRAL 3670 // 3671 // LE Whitelist Management 3672 // 3673 3674 // check if whitelist needs modification 3675 btstack_linked_list_iterator_t lit; 3676 int modification_pending = 0; 3677 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3678 while (btstack_linked_list_iterator_has_next(&lit)){ 3679 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3680 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3681 modification_pending = 1; 3682 break; 3683 } 3684 } 3685 3686 if (modification_pending){ 3687 // stop connnecting if modification pending 3688 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3689 hci_send_cmd(&hci_le_create_connection_cancel); 3690 return true; 3691 } 3692 3693 // add/remove entries 3694 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3695 while (btstack_linked_list_iterator_has_next(&lit)){ 3696 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3697 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3698 entry->state = LE_WHITELIST_ON_CONTROLLER; 3699 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3700 return true; 3701 } 3702 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3703 bd_addr_t address; 3704 bd_addr_type_t address_type = entry->address_type; 3705 (void)memcpy(address, entry->address, 6); 3706 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3707 btstack_memory_whitelist_entry_free(entry); 3708 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3709 return true; 3710 } 3711 } 3712 } 3713 3714 // start connecting 3715 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3716 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3717 bd_addr_t null_addr; 3718 memset(null_addr, 0, 6); 3719 hci_send_cmd(&hci_le_create_connection, 3720 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3721 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3722 1, // use whitelist 3723 0, // peer address type 3724 null_addr, // peer bd addr 3725 hci_stack->le_own_addr_type, // our addr type: 3726 hci_stack->le_connection_interval_min, // conn interval min 3727 hci_stack->le_connection_interval_max, // conn interval max 3728 hci_stack->le_connection_latency, // conn latency 3729 hci_stack->le_supervision_timeout, // conn latency 3730 hci_stack->le_minimum_ce_length, // min ce length 3731 hci_stack->le_maximum_ce_length // max ce length 3732 ); 3733 return true; 3734 } 3735 #endif 3736 return false; 3737 } 3738 #endif 3739 3740 static bool hci_run_general_pending_commmands(void){ 3741 btstack_linked_item_t * it; 3742 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3743 hci_connection_t * connection = (hci_connection_t *) it; 3744 3745 switch(connection->state){ 3746 case SEND_CREATE_CONNECTION: 3747 switch(connection->address_type){ 3748 #ifdef ENABLE_CLASSIC 3749 case BD_ADDR_TYPE_ACL: 3750 log_info("sending hci_create_connection"); 3751 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3752 break; 3753 #endif 3754 default: 3755 #ifdef ENABLE_BLE 3756 #ifdef ENABLE_LE_CENTRAL 3757 // track outgoing connection 3758 hci_stack->outgoing_addr_type = connection->address_type; 3759 (void)memcpy(hci_stack->outgoing_addr, 3760 connection->address, 6); 3761 log_info("sending hci_le_create_connection"); 3762 hci_send_cmd(&hci_le_create_connection, 3763 hci_stack->le_connection_scan_interval, // conn scan interval 3764 hci_stack->le_connection_scan_window, // conn scan windows 3765 0, // don't use whitelist 3766 connection->address_type, // peer address type 3767 connection->address, // peer bd addr 3768 hci_stack->le_own_addr_type, // our addr type: 3769 hci_stack->le_connection_interval_min, // conn interval min 3770 hci_stack->le_connection_interval_max, // conn interval max 3771 hci_stack->le_connection_latency, // conn latency 3772 hci_stack->le_supervision_timeout, // conn latency 3773 hci_stack->le_minimum_ce_length, // min ce length 3774 hci_stack->le_maximum_ce_length // max ce length 3775 ); 3776 connection->state = SENT_CREATE_CONNECTION; 3777 #endif 3778 #endif 3779 break; 3780 } 3781 return true; 3782 3783 #ifdef ENABLE_CLASSIC 3784 case RECEIVED_CONNECTION_REQUEST: 3785 connection->role = HCI_ROLE_SLAVE; 3786 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3787 log_info("sending hci_accept_connection_request"); 3788 connection->state = ACCEPTED_CONNECTION_REQUEST; 3789 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3790 } 3791 return true; 3792 #endif 3793 3794 #ifdef ENABLE_BLE 3795 #ifdef ENABLE_LE_CENTRAL 3796 case SEND_CANCEL_CONNECTION: 3797 connection->state = SENT_CANCEL_CONNECTION; 3798 hci_send_cmd(&hci_le_create_connection_cancel); 3799 return true; 3800 #endif 3801 #endif 3802 case SEND_DISCONNECT: 3803 connection->state = SENT_DISCONNECT; 3804 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3805 return true; 3806 3807 default: 3808 break; 3809 } 3810 3811 // no further commands if connection is about to get shut down 3812 if (connection->state == SENT_DISCONNECT) continue; 3813 3814 if (connection->authentication_flags & READ_RSSI){ 3815 connectionClearAuthenticationFlags(connection, READ_RSSI); 3816 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3817 return true; 3818 } 3819 3820 #ifdef ENABLE_CLASSIC 3821 3822 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3823 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3824 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3825 return true; 3826 } 3827 3828 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3829 log_info("responding to link key request"); 3830 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3831 3832 link_key_t link_key; 3833 link_key_type_t link_key_type; 3834 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 3835 3836 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3837 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 3838 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 3839 if (sc_downgrade){ 3840 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 3841 connection->state = SENT_DISCONNECT; 3842 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3843 return true; 3844 } 3845 3846 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 3847 if (have_link_key && security_level_sufficient){ 3848 connection->link_key_type = link_key_type; 3849 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3850 } else { 3851 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3852 } 3853 return true; 3854 } 3855 3856 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3857 log_info("denying to pin request"); 3858 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3859 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3860 return true; 3861 } 3862 3863 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3864 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3865 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3866 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3867 // tweak authentication requirements 3868 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3869 if (connection->bonding_flags & BONDING_DEDICATED){ 3870 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3871 } 3872 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3873 authreq |= 1; 3874 } 3875 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3876 } else { 3877 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3878 } 3879 return true; 3880 } 3881 3882 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3883 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3884 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3885 return true; 3886 } 3887 3888 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3889 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3890 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3891 return true; 3892 } 3893 3894 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3895 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3896 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3897 return true; 3898 } 3899 3900 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3901 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3902 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3903 return true; 3904 } 3905 3906 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3907 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3908 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3909 return true; 3910 } 3911 3912 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3913 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3914 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3915 connection->state = SENT_DISCONNECT; 3916 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3917 return true; 3918 } 3919 3920 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3921 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3922 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 3923 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3924 return true; 3925 } 3926 3927 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3928 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3929 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3930 return true; 3931 } 3932 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3933 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3934 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3935 return true; 3936 } 3937 #endif 3938 3939 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3940 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3941 if (connection->state != SENT_DISCONNECT){ 3942 connection->state = SENT_DISCONNECT; 3943 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3944 return true; 3945 } 3946 } 3947 3948 #ifdef ENABLE_CLASSIC 3949 uint16_t sniff_min_interval; 3950 switch (connection->sniff_min_interval){ 3951 case 0: 3952 break; 3953 case 0xffff: 3954 connection->sniff_min_interval = 0; 3955 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3956 return true; 3957 default: 3958 sniff_min_interval = connection->sniff_min_interval; 3959 connection->sniff_min_interval = 0; 3960 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3961 return true; 3962 } 3963 #endif 3964 3965 #ifdef ENABLE_BLE 3966 switch (connection->le_con_parameter_update_state){ 3967 // response to L2CAP CON PARAMETER UPDATE REQUEST 3968 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3969 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3970 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3971 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3972 0x0000, 0xffff); 3973 return true; 3974 case CON_PARAMETER_UPDATE_REPLY: 3975 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3976 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3977 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3978 0x0000, 0xffff); 3979 return true; 3980 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3981 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3982 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3983 return true; 3984 default: 3985 break; 3986 } 3987 if (connection->le_phy_update_all_phys != 0xffu){ 3988 uint8_t all_phys = connection->le_phy_update_all_phys; 3989 connection->le_phy_update_all_phys = 0xff; 3990 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); 3991 return true; 3992 } 3993 #endif 3994 } 3995 return false; 3996 } 3997 3998 static void hci_run(void){ 3999 4000 bool done; 4001 4002 // send continuation fragments first, as they block the prepared packet buffer 4003 done = hci_run_acl_fragments(); 4004 if (done) return; 4005 4006 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4007 // send host num completed packets next as they don't require num_cmd_packets > 0 4008 if (!hci_can_send_comand_packet_transport()) return; 4009 if (hci_stack->host_completed_packets){ 4010 hci_host_num_completed_packets(); 4011 return; 4012 } 4013 #endif 4014 4015 if (!hci_can_send_command_packet_now()) return; 4016 4017 // global/non-connection oriented commands 4018 4019 4020 #ifdef ENABLE_CLASSIC 4021 // general gap classic 4022 done = hci_run_general_gap_classic(); 4023 if (done) return; 4024 #endif 4025 4026 #ifdef ENABLE_BLE 4027 // general gap le 4028 done = hci_run_general_gap_le(); 4029 if (done) return; 4030 #endif 4031 4032 // send pending HCI commands 4033 done = hci_run_general_pending_commmands(); 4034 if (done) return; 4035 4036 // stack state sub statemachines 4037 hci_connection_t * connection; 4038 switch (hci_stack->state){ 4039 case HCI_STATE_INITIALIZING: 4040 hci_initializing_run(); 4041 break; 4042 4043 case HCI_STATE_HALTING: 4044 4045 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4046 switch (hci_stack->substate){ 4047 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4048 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4049 4050 #ifdef ENABLE_BLE 4051 #ifdef ENABLE_LE_CENTRAL 4052 // free whitelist entries 4053 { 4054 btstack_linked_list_iterator_t lit; 4055 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4056 while (btstack_linked_list_iterator_has_next(&lit)){ 4057 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4058 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4059 btstack_memory_whitelist_entry_free(entry); 4060 } 4061 } 4062 #endif 4063 #endif 4064 // close all open connections 4065 connection = (hci_connection_t *) hci_stack->connections; 4066 if (connection){ 4067 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4068 if (!hci_can_send_command_packet_now()) return; 4069 4070 // check state 4071 if (connection->state == SENT_DISCONNECT) return; 4072 connection->state = SENT_DISCONNECT; 4073 4074 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4075 4076 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4077 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4078 4079 // ... which would be ignored anyway as we shutdown (free) the connection now 4080 hci_shutdown_connection(connection); 4081 4082 // finally, send the disconnect command 4083 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4084 return; 4085 } 4086 4087 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4088 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4089 log_info("HCI_STATE_HALTING: wait 50 ms"); 4090 hci_stack->substate = HCI_HALTING_W4_TIMER; 4091 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4092 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4093 btstack_run_loop_add_timer(&hci_stack->timeout); 4094 break; 4095 } 4096 4097 /* fall through */ 4098 4099 case HCI_HALTING_CLOSE: 4100 log_info("HCI_STATE_HALTING, calling off"); 4101 4102 // switch mode 4103 hci_power_control_off(); 4104 4105 log_info("HCI_STATE_HALTING, emitting state"); 4106 hci_emit_state(); 4107 log_info("HCI_STATE_HALTING, done"); 4108 break; 4109 4110 case HCI_HALTING_W4_TIMER: 4111 // keep waiting 4112 4113 break; 4114 default: 4115 break; 4116 } 4117 4118 break; 4119 4120 case HCI_STATE_FALLING_ASLEEP: 4121 switch(hci_stack->substate) { 4122 case HCI_FALLING_ASLEEP_DISCONNECT: 4123 log_info("HCI_STATE_FALLING_ASLEEP"); 4124 // close all open connections 4125 connection = (hci_connection_t *) hci_stack->connections; 4126 4127 #ifdef HAVE_PLATFORM_IPHONE_OS 4128 // don't close connections, if H4 supports power management 4129 if (btstack_control_iphone_power_management_enabled()){ 4130 connection = NULL; 4131 } 4132 #endif 4133 if (connection){ 4134 4135 // send disconnect 4136 if (!hci_can_send_command_packet_now()) return; 4137 4138 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4139 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4140 4141 // send disconnected event right away - causes higher layer connections to get closed, too. 4142 hci_shutdown_connection(connection); 4143 return; 4144 } 4145 4146 if (hci_classic_supported()){ 4147 // disable page and inquiry scan 4148 if (!hci_can_send_command_packet_now()) return; 4149 4150 log_info("HCI_STATE_HALTING, disabling inq scans"); 4151 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4152 4153 // continue in next sub state 4154 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4155 break; 4156 } 4157 4158 /* fall through */ 4159 4160 case HCI_FALLING_ASLEEP_COMPLETE: 4161 log_info("HCI_STATE_HALTING, calling sleep"); 4162 #ifdef HAVE_PLATFORM_IPHONE_OS 4163 // don't actually go to sleep, if H4 supports power management 4164 if (btstack_control_iphone_power_management_enabled()){ 4165 // SLEEP MODE reached 4166 hci_stack->state = HCI_STATE_SLEEPING; 4167 hci_emit_state(); 4168 break; 4169 } 4170 #endif 4171 // switch mode 4172 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4173 hci_emit_state(); 4174 break; 4175 4176 default: 4177 break; 4178 } 4179 break; 4180 4181 default: 4182 break; 4183 } 4184 } 4185 4186 int hci_send_cmd_packet(uint8_t *packet, int size){ 4187 // house-keeping 4188 4189 #ifdef ENABLE_CLASSIC 4190 bd_addr_t addr; 4191 hci_connection_t * conn; 4192 #endif 4193 #ifdef ENABLE_LE_CENTRAL 4194 uint8_t initiator_filter_policy; 4195 #endif 4196 4197 uint16_t opcode = little_endian_read_16(packet, 0); 4198 switch (opcode) { 4199 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4200 hci_stack->loopback_mode = packet[3]; 4201 break; 4202 4203 #ifdef ENABLE_CLASSIC 4204 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4205 reverse_bd_addr(&packet[3], addr); 4206 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4207 4208 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4209 if (!conn) { 4210 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4211 if (!conn) { 4212 // notify client that alloc failed 4213 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4214 return -1; // packet not sent to controller 4215 } 4216 conn->state = SEND_CREATE_CONNECTION; 4217 conn->role = HCI_ROLE_MASTER; 4218 } 4219 log_info("conn state %u", conn->state); 4220 switch (conn->state) { 4221 // if connection active exists 4222 case OPEN: 4223 // and OPEN, emit connection complete command 4224 hci_emit_connection_complete(addr, conn->con_handle, 0); 4225 return -1; // packet not sent to controller 4226 case RECEIVED_DISCONNECTION_COMPLETE: 4227 // create connection triggered in disconnect complete event, let's do it now 4228 break; 4229 case SEND_CREATE_CONNECTION: 4230 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4231 break; 4232 default: 4233 // otherwise, just ignore as it is already in the open process 4234 return -1; // packet not sent to controller 4235 } 4236 conn->state = SENT_CREATE_CONNECTION; 4237 4238 // track outgoing connection 4239 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4240 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4241 break; 4242 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4243 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4244 break; 4245 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4246 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4247 break; 4248 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4249 if (hci_stack->link_key_db) { 4250 reverse_bd_addr(&packet[3], addr); 4251 hci_stack->link_key_db->delete_link_key(addr); 4252 } 4253 break; 4254 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4255 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4256 reverse_bd_addr(&packet[3], addr); 4257 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4258 if (conn) { 4259 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4260 } 4261 break; 4262 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4263 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4264 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4265 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4266 reverse_bd_addr(&packet[3], addr); 4267 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4268 if (conn) { 4269 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4270 } 4271 break; 4272 4273 #ifdef ENABLE_SCO_OVER_HCI 4274 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4275 // setup_synchronous_connection? Voice setting at offset 22 4276 // TODO: compare to current setting if sco connection already active 4277 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4278 break; 4279 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4280 // accept_synchronus_connection? Voice setting at offset 18 4281 // TODO: compare to current setting if sco connection already active 4282 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4283 break; 4284 #endif 4285 #endif 4286 4287 #ifdef ENABLE_BLE 4288 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4289 hci_stack->le_random_address_set = 1; 4290 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4291 break; 4292 #ifdef ENABLE_LE_PERIPHERAL 4293 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4294 hci_stack->le_advertisements_active = packet[3]; 4295 break; 4296 #endif 4297 #ifdef ENABLE_LE_CENTRAL 4298 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4299 // white list used? 4300 initiator_filter_policy = packet[7]; 4301 switch (initiator_filter_policy) { 4302 case 0: 4303 // whitelist not used 4304 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4305 break; 4306 case 1: 4307 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4308 break; 4309 default: 4310 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4311 break; 4312 } 4313 break; 4314 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4315 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4316 break; 4317 #endif 4318 #endif 4319 default: 4320 break; 4321 } 4322 4323 hci_stack->num_cmd_packets--; 4324 4325 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4326 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4327 } 4328 4329 // disconnect because of security block 4330 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4331 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4332 if (!connection) return; 4333 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4334 } 4335 4336 4337 // Configure Secure Simple Pairing 4338 4339 #ifdef ENABLE_CLASSIC 4340 4341 // enable will enable SSP during init 4342 void gap_ssp_set_enable(int enable){ 4343 hci_stack->ssp_enable = enable; 4344 } 4345 4346 static int hci_local_ssp_activated(void){ 4347 return gap_ssp_supported() && hci_stack->ssp_enable; 4348 } 4349 4350 // if set, BTstack will respond to io capability request using authentication requirement 4351 void gap_ssp_set_io_capability(int io_capability){ 4352 hci_stack->ssp_io_capability = io_capability; 4353 } 4354 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4355 hci_stack->ssp_authentication_requirement = authentication_requirement; 4356 } 4357 4358 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4359 void gap_ssp_set_auto_accept(int auto_accept){ 4360 hci_stack->ssp_auto_accept = auto_accept; 4361 } 4362 4363 void gap_secure_connections_enable(bool enable){ 4364 hci_stack->secure_connections_enable = enable; 4365 } 4366 4367 #endif 4368 4369 // va_list part of hci_send_cmd 4370 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4371 if (!hci_can_send_command_packet_now()){ 4372 log_error("hci_send_cmd called but cannot send packet now"); 4373 return 0; 4374 } 4375 4376 // for HCI INITIALIZATION 4377 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4378 hci_stack->last_cmd_opcode = cmd->opcode; 4379 4380 hci_reserve_packet_buffer(); 4381 uint8_t * packet = hci_stack->hci_packet_buffer; 4382 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4383 int err = hci_send_cmd_packet(packet, size); 4384 4385 // release packet buffer on error or for synchronous transport implementations 4386 if ((err < 0) || hci_transport_synchronous()){ 4387 hci_release_packet_buffer(); 4388 hci_emit_transport_packet_sent(); 4389 } 4390 4391 return err; 4392 } 4393 4394 /** 4395 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4396 */ 4397 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4398 va_list argptr; 4399 va_start(argptr, cmd); 4400 int res = hci_send_cmd_va_arg(cmd, argptr); 4401 va_end(argptr); 4402 return res; 4403 } 4404 4405 // Create various non-HCI events. 4406 // TODO: generalize, use table similar to hci_create_command 4407 4408 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4409 // dump packet 4410 if (dump) { 4411 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4412 } 4413 4414 // dispatch to all event handlers 4415 btstack_linked_list_iterator_t it; 4416 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4417 while (btstack_linked_list_iterator_has_next(&it)){ 4418 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4419 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4420 } 4421 } 4422 4423 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4424 if (!hci_stack->acl_packet_handler) return; 4425 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4426 } 4427 4428 #ifdef ENABLE_CLASSIC 4429 static void hci_notify_if_sco_can_send_now(void){ 4430 // notify SCO sender if waiting 4431 if (!hci_stack->sco_waiting_for_can_send_now) return; 4432 if (hci_can_send_sco_packet_now()){ 4433 hci_stack->sco_waiting_for_can_send_now = 0; 4434 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4435 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4436 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4437 } 4438 } 4439 4440 // parsing end emitting has been merged to reduce code size 4441 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4442 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4443 4444 uint8_t * eir_data; 4445 ad_context_t context; 4446 const uint8_t * name; 4447 uint8_t name_len; 4448 4449 if (size < 3) return; 4450 4451 int event_type = hci_event_packet_get_type(packet); 4452 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4453 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4454 4455 switch (event_type){ 4456 case HCI_EVENT_INQUIRY_RESULT: 4457 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4458 if (size != (3 + (num_responses * 14))) return; 4459 break; 4460 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4461 if (size != 257) return; 4462 if (num_responses != 1) return; 4463 break; 4464 default: 4465 return; 4466 } 4467 4468 // event[1] is set at the end 4469 int i; 4470 for (i=0; i<num_responses;i++){ 4471 memset(event, 0, sizeof(event)); 4472 event[0] = GAP_EVENT_INQUIRY_RESULT; 4473 uint8_t event_size = 18; // if name is not set by EIR 4474 4475 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4476 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4477 (void)memcpy(&event[9], 4478 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4479 3); // class of device 4480 (void)memcpy(&event[12], 4481 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4482 2); // clock offset 4483 4484 switch (event_type){ 4485 case HCI_EVENT_INQUIRY_RESULT: 4486 // 14,15,16,17 = 0, size 18 4487 break; 4488 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4489 event[14] = 1; 4490 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4491 // 16,17 = 0, size 18 4492 break; 4493 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4494 event[14] = 1; 4495 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4496 // EIR packets only contain a single inquiry response 4497 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4498 name = NULL; 4499 // Iterate over EIR data 4500 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4501 uint8_t data_type = ad_iterator_get_data_type(&context); 4502 uint8_t data_size = ad_iterator_get_data_len(&context); 4503 const uint8_t * data = ad_iterator_get_data(&context); 4504 // Prefer Complete Local Name over Shortend Local Name 4505 switch (data_type){ 4506 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4507 if (name) continue; 4508 /* fall through */ 4509 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4510 name = data; 4511 name_len = data_size; 4512 break; 4513 default: 4514 break; 4515 } 4516 } 4517 if (name){ 4518 event[16] = 1; 4519 // truncate name if needed 4520 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4521 event[17] = len; 4522 (void)memcpy(&event[18], name, len); 4523 event_size += len; 4524 } 4525 break; 4526 } 4527 event[1] = event_size - 2; 4528 hci_emit_event(event, event_size, 1); 4529 } 4530 } 4531 #endif 4532 4533 void hci_emit_state(void){ 4534 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4535 uint8_t event[3]; 4536 event[0] = BTSTACK_EVENT_STATE; 4537 event[1] = sizeof(event) - 2u; 4538 event[2] = hci_stack->state; 4539 hci_emit_event(event, sizeof(event), 1); 4540 } 4541 4542 #ifdef ENABLE_CLASSIC 4543 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4544 uint8_t event[13]; 4545 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4546 event[1] = sizeof(event) - 2; 4547 event[2] = status; 4548 little_endian_store_16(event, 3, con_handle); 4549 reverse_bd_addr(address, &event[5]); 4550 event[11] = 1; // ACL connection 4551 event[12] = 0; // encryption disabled 4552 hci_emit_event(event, sizeof(event), 1); 4553 } 4554 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4555 if (disable_l2cap_timeouts) return; 4556 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4557 uint8_t event[4]; 4558 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4559 event[1] = sizeof(event) - 2; 4560 little_endian_store_16(event, 2, conn->con_handle); 4561 hci_emit_event(event, sizeof(event), 1); 4562 } 4563 #endif 4564 4565 #ifdef ENABLE_BLE 4566 #ifdef ENABLE_LE_CENTRAL 4567 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4568 uint8_t event[21]; 4569 event[0] = HCI_EVENT_LE_META; 4570 event[1] = sizeof(event) - 2u; 4571 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4572 event[3] = status; 4573 little_endian_store_16(event, 4, con_handle); 4574 event[6] = 0; // TODO: role 4575 event[7] = address_type; 4576 reverse_bd_addr(address, &event[8]); 4577 little_endian_store_16(event, 14, 0); // interval 4578 little_endian_store_16(event, 16, 0); // latency 4579 little_endian_store_16(event, 18, 0); // supervision timeout 4580 event[20] = 0; // master clock accuracy 4581 hci_emit_event(event, sizeof(event), 1); 4582 } 4583 #endif 4584 #endif 4585 4586 static void hci_emit_transport_packet_sent(void){ 4587 // notify upper stack that it might be possible to send again 4588 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4589 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4590 } 4591 4592 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4593 uint8_t event[6]; 4594 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4595 event[1] = sizeof(event) - 2u; 4596 event[2] = 0; // status = OK 4597 little_endian_store_16(event, 3, con_handle); 4598 event[5] = reason; 4599 hci_emit_event(event, sizeof(event), 1); 4600 } 4601 4602 static void hci_emit_nr_connections_changed(void){ 4603 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4604 uint8_t event[3]; 4605 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4606 event[1] = sizeof(event) - 2u; 4607 event[2] = nr_hci_connections(); 4608 hci_emit_event(event, sizeof(event), 1); 4609 } 4610 4611 static void hci_emit_hci_open_failed(void){ 4612 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4613 uint8_t event[2]; 4614 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4615 event[1] = sizeof(event) - 2u; 4616 hci_emit_event(event, sizeof(event), 1); 4617 } 4618 4619 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4620 log_info("hci_emit_dedicated_bonding_result %u ", status); 4621 uint8_t event[9]; 4622 int pos = 0; 4623 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4624 event[pos++] = sizeof(event) - 2u; 4625 event[pos++] = status; 4626 reverse_bd_addr(address, &event[pos]); 4627 hci_emit_event(event, sizeof(event), 1); 4628 } 4629 4630 4631 #ifdef ENABLE_CLASSIC 4632 4633 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4634 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4635 uint8_t event[5]; 4636 int pos = 0; 4637 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4638 event[pos++] = sizeof(event) - 2; 4639 little_endian_store_16(event, 2, con_handle); 4640 pos += 2; 4641 event[pos++] = level; 4642 hci_emit_event(event, sizeof(event), 1); 4643 } 4644 4645 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4646 if (!connection) return LEVEL_0; 4647 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4648 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4649 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4650 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4651 // LEVEL 4 always requires 128 bit encrytion key size 4652 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4653 security_level = LEVEL_3; 4654 } 4655 return security_level; 4656 } 4657 4658 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4659 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4660 uint8_t event[3]; 4661 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4662 event[1] = sizeof(event) - 2; 4663 event[2] = enabled; 4664 hci_emit_event(event, sizeof(event), 1); 4665 } 4666 4667 // query if remote side supports eSCO 4668 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4669 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4670 if (!connection) return 0; 4671 return (connection->remote_supported_features[0] & 1) != 0; 4672 } 4673 4674 static bool hci_ssp_supported(hci_connection_t * connection){ 4675 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4676 return (connection->bonding_flags & mask) == mask; 4677 } 4678 4679 // query if remote side supports SSP 4680 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4681 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4682 if (!connection) return 0; 4683 return hci_ssp_supported(connection) ? 1 : 0; 4684 } 4685 4686 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4687 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4688 } 4689 4690 // GAP API 4691 /** 4692 * @bbrief enable/disable bonding. default is enabled 4693 * @praram enabled 4694 */ 4695 void gap_set_bondable_mode(int enable){ 4696 hci_stack->bondable = enable ? 1 : 0; 4697 } 4698 /** 4699 * @brief Get bondable mode. 4700 * @return 1 if bondable 4701 */ 4702 int gap_get_bondable_mode(void){ 4703 return hci_stack->bondable; 4704 } 4705 4706 /** 4707 * @brief map link keys to security levels 4708 */ 4709 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4710 switch (link_key_type){ 4711 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4712 return LEVEL_4; 4713 case COMBINATION_KEY: 4714 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4715 return LEVEL_3; 4716 default: 4717 return LEVEL_2; 4718 } 4719 } 4720 4721 /** 4722 * @brief map link keys to secure connection yes/no 4723 */ 4724 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4725 switch (link_key_type){ 4726 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4727 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4728 return 1; 4729 default: 4730 return 0; 4731 } 4732 } 4733 4734 /** 4735 * @brief map link keys to authenticated 4736 */ 4737 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4738 switch (link_key_type){ 4739 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4740 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4741 return 1; 4742 default: 4743 return 0; 4744 } 4745 } 4746 4747 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4748 log_info("gap_mitm_protection_required_for_security_level %u", level); 4749 return level > LEVEL_2; 4750 } 4751 4752 /** 4753 * @brief get current security level 4754 */ 4755 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4756 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4757 if (!connection) return LEVEL_0; 4758 return gap_security_level_for_connection(connection); 4759 } 4760 4761 /** 4762 * @brief request connection to device to 4763 * @result GAP_AUTHENTICATION_RESULT 4764 */ 4765 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4766 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4767 if (!connection){ 4768 hci_emit_security_level(con_handle, LEVEL_0); 4769 return; 4770 } 4771 gap_security_level_t current_level = gap_security_level(con_handle); 4772 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4773 requested_level, connection->requested_security_level, current_level); 4774 4775 // assumption: earlier requested security higher than current level => security request is active 4776 if (current_level < connection->requested_security_level){ 4777 if (connection->requested_security_level < requested_level){ 4778 // increase requested level as new level is higher 4779 4780 // TODO: handle re-authentication when done 4781 4782 connection->requested_security_level = requested_level; 4783 } 4784 return; 4785 } 4786 4787 // no request active, notify if security sufficient 4788 if (requested_level <= current_level){ 4789 hci_emit_security_level(con_handle, current_level); 4790 return; 4791 } 4792 4793 // start pairing to increase security level 4794 connection->requested_security_level = requested_level; 4795 4796 #if 0 4797 // sending encryption request without a link key results in an error. 4798 // TODO: figure out how to use it properly 4799 4800 // would enabling ecnryption suffice (>= LEVEL_2)? 4801 if (hci_stack->link_key_db){ 4802 link_key_type_t link_key_type; 4803 link_key_t link_key; 4804 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4805 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4806 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4807 return; 4808 } 4809 } 4810 } 4811 #endif 4812 4813 // start to authenticate connection if not already active 4814 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 4815 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4816 hci_run(); 4817 } 4818 4819 /** 4820 * @brief start dedicated bonding with device. disconnect after bonding 4821 * @param device 4822 * @param request MITM protection 4823 * @result GAP_DEDICATED_BONDING_COMPLETE 4824 */ 4825 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4826 4827 // create connection state machine 4828 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4829 4830 if (!connection){ 4831 return BTSTACK_MEMORY_ALLOC_FAILED; 4832 } 4833 4834 // delete linkn key 4835 gap_drop_link_key_for_bd_addr(device); 4836 4837 // configure LEVEL_2/3, dedicated bonding 4838 connection->state = SEND_CREATE_CONNECTION; 4839 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4840 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4841 connection->bonding_flags = BONDING_DEDICATED; 4842 4843 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4844 4845 // handle: connnection failure (connection complete != ok) 4846 // handle: authentication failure 4847 // handle: disconnect on done 4848 4849 hci_run(); 4850 4851 return 0; 4852 } 4853 #endif 4854 4855 void gap_set_local_name(const char * local_name){ 4856 hci_stack->local_name = local_name; 4857 } 4858 4859 4860 #ifdef ENABLE_BLE 4861 4862 #ifdef ENABLE_LE_CENTRAL 4863 void gap_start_scan(void){ 4864 hci_stack->le_scanning_enabled = 1; 4865 hci_run(); 4866 } 4867 4868 void gap_stop_scan(void){ 4869 hci_stack->le_scanning_enabled = 0; 4870 hci_run(); 4871 } 4872 4873 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4874 hci_stack->le_scan_type = scan_type; 4875 hci_stack->le_scan_interval = scan_interval; 4876 hci_stack->le_scan_window = scan_window; 4877 hci_run(); 4878 } 4879 4880 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4881 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4882 if (!conn){ 4883 log_info("gap_connect: no connection exists yet, creating context"); 4884 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4885 if (!conn){ 4886 // notify client that alloc failed 4887 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4888 log_info("gap_connect: failed to alloc hci_connection_t"); 4889 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4890 } 4891 conn->state = SEND_CREATE_CONNECTION; 4892 log_info("gap_connect: send create connection next"); 4893 hci_run(); 4894 return ERROR_CODE_SUCCESS; 4895 } 4896 4897 if (!hci_is_le_connection(conn) || 4898 (conn->state == SEND_CREATE_CONNECTION) || 4899 (conn->state == SENT_CREATE_CONNECTION)) { 4900 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4901 log_error("gap_connect: classic connection or connect is already being created"); 4902 return GATT_CLIENT_IN_WRONG_STATE; 4903 } 4904 4905 // check if connection was just disconnected 4906 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4907 log_info("gap_connect: send create connection (again)"); 4908 conn->state = SEND_CREATE_CONNECTION; 4909 hci_run(); 4910 return ERROR_CODE_SUCCESS; 4911 } 4912 4913 log_info("gap_connect: context exists with state %u", conn->state); 4914 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4915 hci_run(); 4916 return ERROR_CODE_SUCCESS; 4917 } 4918 4919 // @assumption: only a single outgoing LE Connection exists 4920 static hci_connection_t * gap_get_outgoing_connection(void){ 4921 btstack_linked_item_t *it; 4922 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4923 hci_connection_t * conn = (hci_connection_t *) it; 4924 if (!hci_is_le_connection(conn)) continue; 4925 switch (conn->state){ 4926 case SEND_CREATE_CONNECTION: 4927 case SENT_CREATE_CONNECTION: 4928 case SENT_CANCEL_CONNECTION: 4929 return conn; 4930 default: 4931 break; 4932 }; 4933 } 4934 return NULL; 4935 } 4936 4937 uint8_t gap_connect_cancel(void){ 4938 hci_connection_t * conn = gap_get_outgoing_connection(); 4939 if (!conn) return 0; 4940 switch (conn->state){ 4941 case SEND_CREATE_CONNECTION: 4942 // skip sending create connection and emit event instead 4943 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4944 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4945 btstack_memory_hci_connection_free( conn ); 4946 break; 4947 case SENT_CREATE_CONNECTION: 4948 // request to send cancel connection 4949 conn->state = SEND_CANCEL_CONNECTION; 4950 hci_run(); 4951 break; 4952 default: 4953 break; 4954 } 4955 return 0; 4956 } 4957 #endif 4958 4959 #ifdef ENABLE_LE_CENTRAL 4960 /** 4961 * @brief Set connection parameters for outgoing connections 4962 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4963 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4964 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4965 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4966 * @param conn_latency, default: 4 4967 * @param supervision_timeout (unit: 10ms), default: 720 ms 4968 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4969 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4970 */ 4971 4972 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4973 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4974 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4975 hci_stack->le_connection_scan_interval = conn_scan_interval; 4976 hci_stack->le_connection_scan_window = conn_scan_window; 4977 hci_stack->le_connection_interval_min = conn_interval_min; 4978 hci_stack->le_connection_interval_max = conn_interval_max; 4979 hci_stack->le_connection_latency = conn_latency; 4980 hci_stack->le_supervision_timeout = supervision_timeout; 4981 hci_stack->le_minimum_ce_length = min_ce_length; 4982 hci_stack->le_maximum_ce_length = max_ce_length; 4983 } 4984 #endif 4985 4986 /** 4987 * @brief Updates the connection parameters for a given LE connection 4988 * @param handle 4989 * @param conn_interval_min (unit: 1.25ms) 4990 * @param conn_interval_max (unit: 1.25ms) 4991 * @param conn_latency 4992 * @param supervision_timeout (unit: 10ms) 4993 * @returns 0 if ok 4994 */ 4995 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4996 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4997 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4998 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4999 connection->le_conn_interval_min = conn_interval_min; 5000 connection->le_conn_interval_max = conn_interval_max; 5001 connection->le_conn_latency = conn_latency; 5002 connection->le_supervision_timeout = supervision_timeout; 5003 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5004 hci_run(); 5005 return 0; 5006 } 5007 5008 /** 5009 * @brief Request an update of the connection parameter for a given LE connection 5010 * @param handle 5011 * @param conn_interval_min (unit: 1.25ms) 5012 * @param conn_interval_max (unit: 1.25ms) 5013 * @param conn_latency 5014 * @param supervision_timeout (unit: 10ms) 5015 * @returns 0 if ok 5016 */ 5017 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5018 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5019 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5020 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5021 connection->le_conn_interval_min = conn_interval_min; 5022 connection->le_conn_interval_max = conn_interval_max; 5023 connection->le_conn_latency = conn_latency; 5024 connection->le_supervision_timeout = supervision_timeout; 5025 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5026 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5027 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5028 return 0; 5029 } 5030 5031 #ifdef ENABLE_LE_PERIPHERAL 5032 5033 static void gap_advertisments_changed(void){ 5034 // disable advertisements before updating adv, scan data, or adv params 5035 if (hci_stack->le_advertisements_active){ 5036 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 5037 } 5038 hci_run(); 5039 } 5040 5041 /** 5042 * @brief Set Advertisement Data 5043 * @param advertising_data_length 5044 * @param advertising_data (max 31 octets) 5045 * @note data is not copied, pointer has to stay valid 5046 */ 5047 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5048 hci_stack->le_advertisements_data_len = advertising_data_length; 5049 hci_stack->le_advertisements_data = advertising_data; 5050 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5051 gap_advertisments_changed(); 5052 } 5053 5054 /** 5055 * @brief Set Scan Response Data 5056 * @param advertising_data_length 5057 * @param advertising_data (max 31 octets) 5058 * @note data is not copied, pointer has to stay valid 5059 */ 5060 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5061 hci_stack->le_scan_response_data_len = scan_response_data_length; 5062 hci_stack->le_scan_response_data = scan_response_data; 5063 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5064 gap_advertisments_changed(); 5065 } 5066 5067 /** 5068 * @brief Set Advertisement Parameters 5069 * @param adv_int_min 5070 * @param adv_int_max 5071 * @param adv_type 5072 * @param direct_address_type 5073 * @param direct_address 5074 * @param channel_map 5075 * @param filter_policy 5076 * 5077 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5078 */ 5079 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5080 uint8_t direct_address_typ, bd_addr_t direct_address, 5081 uint8_t channel_map, uint8_t filter_policy) { 5082 5083 hci_stack->le_advertisements_interval_min = adv_int_min; 5084 hci_stack->le_advertisements_interval_max = adv_int_max; 5085 hci_stack->le_advertisements_type = adv_type; 5086 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5087 hci_stack->le_advertisements_channel_map = channel_map; 5088 hci_stack->le_advertisements_filter_policy = filter_policy; 5089 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5090 6); 5091 5092 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5093 gap_advertisments_changed(); 5094 } 5095 5096 /** 5097 * @brief Enable/Disable Advertisements 5098 * @param enabled 5099 */ 5100 void gap_advertisements_enable(int enabled){ 5101 hci_stack->le_advertisements_enabled = enabled; 5102 if (enabled && !hci_stack->le_advertisements_active){ 5103 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5104 } 5105 if (!enabled && hci_stack->le_advertisements_active){ 5106 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5107 } 5108 hci_run(); 5109 } 5110 5111 #endif 5112 5113 void hci_le_set_own_address_type(uint8_t own_address_type){ 5114 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5115 if (own_address_type == hci_stack->le_own_addr_type) return; 5116 hci_stack->le_own_addr_type = own_address_type; 5117 5118 #ifdef ENABLE_LE_PERIPHERAL 5119 // update advertisement parameters, too 5120 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5121 gap_advertisments_changed(); 5122 #endif 5123 #ifdef ENABLE_LE_CENTRAL 5124 // note: we don't update scan parameters or modify ongoing connection attempts 5125 #endif 5126 } 5127 5128 #endif 5129 5130 uint8_t gap_disconnect(hci_con_handle_t handle){ 5131 hci_connection_t * conn = hci_connection_for_handle(handle); 5132 if (!conn){ 5133 hci_emit_disconnection_complete(handle, 0); 5134 return 0; 5135 } 5136 // ignore if already disconnected 5137 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5138 return 0; 5139 } 5140 conn->state = SEND_DISCONNECT; 5141 hci_run(); 5142 return 0; 5143 } 5144 5145 int gap_read_rssi(hci_con_handle_t con_handle){ 5146 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5147 if (hci_connection == NULL) return 0; 5148 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5149 hci_run(); 5150 return 1; 5151 } 5152 5153 /** 5154 * @brief Get connection type 5155 * @param con_handle 5156 * @result connection_type 5157 */ 5158 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5159 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5160 if (!conn) return GAP_CONNECTION_INVALID; 5161 switch (conn->address_type){ 5162 case BD_ADDR_TYPE_LE_PUBLIC: 5163 case BD_ADDR_TYPE_LE_RANDOM: 5164 return GAP_CONNECTION_LE; 5165 case BD_ADDR_TYPE_SCO: 5166 return GAP_CONNECTION_SCO; 5167 case BD_ADDR_TYPE_ACL: 5168 return GAP_CONNECTION_ACL; 5169 default: 5170 return GAP_CONNECTION_INVALID; 5171 } 5172 } 5173 5174 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5175 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5176 if (!conn) return HCI_ROLE_INVALID; 5177 return (hci_role_t) conn->role; 5178 } 5179 5180 5181 #ifdef ENABLE_BLE 5182 5183 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){ 5184 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5185 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5186 5187 conn->le_phy_update_all_phys = all_phys; 5188 conn->le_phy_update_tx_phys = tx_phys; 5189 conn->le_phy_update_rx_phys = rx_phys; 5190 conn->le_phy_update_phy_options = phy_options; 5191 5192 hci_run(); 5193 5194 return 0; 5195 } 5196 5197 #ifdef ENABLE_LE_CENTRAL 5198 /** 5199 * @brief Auto Connection Establishment - Start Connecting to device 5200 * @param address_typ 5201 * @param address 5202 * @returns 0 if ok 5203 */ 5204 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5205 // check capacity 5206 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5207 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5208 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5209 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5210 entry->address_type = address_type; 5211 (void)memcpy(entry->address, address, 6); 5212 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5213 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5214 hci_run(); 5215 return 0; 5216 } 5217 5218 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5219 btstack_linked_list_iterator_t it; 5220 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5221 while (btstack_linked_list_iterator_has_next(&it)){ 5222 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5223 if (entry->address_type != address_type) continue; 5224 if (memcmp(entry->address, address, 6) != 0) continue; 5225 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5226 // remove from controller if already present 5227 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5228 continue; 5229 } 5230 // direclty remove entry from whitelist 5231 btstack_linked_list_iterator_remove(&it); 5232 btstack_memory_whitelist_entry_free(entry); 5233 } 5234 } 5235 5236 /** 5237 * @brief Auto Connection Establishment - Stop Connecting to device 5238 * @param address_typ 5239 * @param address 5240 * @returns 0 if ok 5241 */ 5242 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5243 hci_remove_from_whitelist(address_type, address); 5244 hci_run(); 5245 return 0; 5246 } 5247 5248 /** 5249 * @brief Auto Connection Establishment - Stop everything 5250 * @note Convenience function to stop all active auto connection attempts 5251 */ 5252 void gap_auto_connection_stop_all(void){ 5253 btstack_linked_list_iterator_t it; 5254 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5255 while (btstack_linked_list_iterator_has_next(&it)){ 5256 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5257 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5258 // remove from controller if already present 5259 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5260 continue; 5261 } 5262 // directly remove entry from whitelist 5263 btstack_linked_list_iterator_remove(&it); 5264 btstack_memory_whitelist_entry_free(entry); 5265 } 5266 hci_run(); 5267 } 5268 5269 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5270 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5271 if (!conn) return 0; 5272 return conn->le_connection_interval; 5273 } 5274 #endif 5275 #endif 5276 5277 #ifdef ENABLE_CLASSIC 5278 /** 5279 * @brief Set Extended Inquiry Response data 5280 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5281 * @note has to be done before stack starts up 5282 */ 5283 void gap_set_extended_inquiry_response(const uint8_t * data){ 5284 hci_stack->eir_data = data; 5285 } 5286 5287 /** 5288 * @brief Start GAP Classic Inquiry 5289 * @param duration in 1.28s units 5290 * @return 0 if ok 5291 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5292 */ 5293 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5294 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5295 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5296 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5297 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5298 } 5299 hci_stack->inquiry_state = duration_in_1280ms_units; 5300 hci_run(); 5301 return 0; 5302 } 5303 5304 /** 5305 * @brief Stop GAP Classic Inquiry 5306 * @returns 0 if ok 5307 */ 5308 int gap_inquiry_stop(void){ 5309 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5310 // emit inquiry complete event, before it even started 5311 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5312 hci_emit_event(event, sizeof(event), 1); 5313 return 0; 5314 } 5315 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5316 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5317 hci_run(); 5318 return 0; 5319 } 5320 5321 5322 /** 5323 * @brief Remote Name Request 5324 * @param addr 5325 * @param page_scan_repetition_mode 5326 * @param clock_offset only used when bit 15 is set 5327 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5328 */ 5329 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5330 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5331 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5332 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5333 hci_stack->remote_name_clock_offset = clock_offset; 5334 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5335 hci_run(); 5336 return 0; 5337 } 5338 5339 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5340 hci_stack->gap_pairing_state = state; 5341 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5342 hci_run(); 5343 return 0; 5344 } 5345 5346 /** 5347 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5348 * @param addr 5349 * @param pin_data 5350 * @param pin_len 5351 * @return 0 if ok 5352 */ 5353 int gap_pin_code_response_binary(bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5354 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5355 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5356 hci_stack->gap_pairing_pin_len = pin_len; 5357 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5358 } 5359 5360 /** 5361 * @brief Legacy Pairing Pin Code Response 5362 * @param addr 5363 * @param pin 5364 * @return 0 if ok 5365 */ 5366 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5367 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5368 } 5369 5370 /** 5371 * @brief Abort Legacy Pairing 5372 * @param addr 5373 * @param pin 5374 * @return 0 if ok 5375 */ 5376 int gap_pin_code_negative(bd_addr_t addr){ 5377 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5378 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5379 } 5380 5381 /** 5382 * @brief SSP Passkey Response 5383 * @param addr 5384 * @param passkey 5385 * @return 0 if ok 5386 */ 5387 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5388 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5389 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5390 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5391 } 5392 5393 /** 5394 * @brief Abort SSP Passkey Entry/Pairing 5395 * @param addr 5396 * @param pin 5397 * @return 0 if ok 5398 */ 5399 int gap_ssp_passkey_negative(bd_addr_t addr){ 5400 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5401 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5402 } 5403 5404 /** 5405 * @brief Accept SSP Numeric Comparison 5406 * @param addr 5407 * @param passkey 5408 * @return 0 if ok 5409 */ 5410 int gap_ssp_confirmation_response(bd_addr_t addr){ 5411 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5412 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5413 } 5414 5415 /** 5416 * @brief Abort SSP Numeric Comparison/Pairing 5417 * @param addr 5418 * @param pin 5419 * @return 0 if ok 5420 */ 5421 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5422 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5423 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5424 } 5425 5426 /** 5427 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5428 * @param inquiry_mode see bluetooth_defines.h 5429 */ 5430 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5431 hci_stack->inquiry_mode = mode; 5432 } 5433 5434 /** 5435 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5436 */ 5437 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5438 hci_stack->sco_voice_setting = voice_setting; 5439 } 5440 5441 /** 5442 * @brief Get SCO Voice Setting 5443 * @return current voice setting 5444 */ 5445 uint16_t hci_get_sco_voice_setting(void){ 5446 return hci_stack->sco_voice_setting; 5447 } 5448 5449 static int hci_have_usb_transport(void){ 5450 if (!hci_stack->hci_transport) return 0; 5451 const char * transport_name = hci_stack->hci_transport->name; 5452 if (!transport_name) return 0; 5453 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5454 } 5455 5456 /** @brief Get SCO packet length for current SCO Voice setting 5457 * @note Using SCO packets of the exact length is required for USB transfer 5458 * @return Length of SCO packets in bytes (not audio frames) 5459 */ 5460 int hci_get_sco_packet_length(void){ 5461 int sco_packet_length = 0; 5462 5463 #ifdef ENABLE_SCO_OVER_HCI 5464 5465 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5466 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5467 5468 if (hci_have_usb_transport()){ 5469 // see Core Spec for H2 USB Transfer. 5470 // 3 byte SCO header + 24 bytes per connection 5471 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5472 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5473 } else { 5474 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5475 sco_packet_length = 3 + 60 * multiplier; 5476 // assert that it still fits inside an SCO buffer 5477 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5478 sco_packet_length = 3 + 60; 5479 } 5480 } 5481 #endif 5482 return sco_packet_length; 5483 } 5484 5485 /** 5486 * @brief Sets the master/slave policy 5487 * @param policy (0: attempt to become master, 1: let connecting device decide) 5488 */ 5489 void hci_set_master_slave_policy(uint8_t policy){ 5490 hci_stack->master_slave_policy = policy; 5491 } 5492 5493 #endif 5494 5495 HCI_STATE hci_get_state(void){ 5496 return hci_stack->state; 5497 } 5498 5499 #ifdef ENABLE_CLASSIC 5500 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5501 hci_stack->gap_classic_accept_callback = accept_callback; 5502 } 5503 #endif 5504 5505 /** 5506 * @brief Set callback for Bluetooth Hardware Error 5507 */ 5508 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5509 hci_stack->hardware_error_callback = fn; 5510 } 5511 5512 void hci_disconnect_all(void){ 5513 btstack_linked_list_iterator_t it; 5514 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5515 while (btstack_linked_list_iterator_has_next(&it)){ 5516 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5517 if (con->state == SENT_DISCONNECT) continue; 5518 con->state = SEND_DISCONNECT; 5519 } 5520 hci_run(); 5521 } 5522 5523 uint16_t hci_get_manufacturer(void){ 5524 return hci_stack->manufacturer; 5525 } 5526 5527 #ifdef ENABLE_BLE 5528 5529 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5530 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5531 if (!hci_con) return NULL; 5532 return &hci_con->sm_connection; 5533 } 5534 5535 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5536 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5537 5538 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5539 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5540 if (hci_connection == NULL) return 0; 5541 if (hci_is_le_connection(hci_connection)){ 5542 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5543 if (sm_conn->sm_connection_encrypted) { 5544 return sm_conn->sm_actual_encryption_key_size; 5545 } 5546 } 5547 #ifdef ENABLE_CLASSIC 5548 else { 5549 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5550 return hci_connection->encryption_key_size; 5551 } 5552 } 5553 #endif 5554 return 0; 5555 } 5556 5557 int gap_authenticated(hci_con_handle_t con_handle){ 5558 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5559 if (hci_connection == NULL) return 0; 5560 5561 switch (hci_connection->address_type){ 5562 case BD_ADDR_TYPE_LE_PUBLIC: 5563 case BD_ADDR_TYPE_LE_RANDOM: 5564 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5565 return hci_connection->sm_connection.sm_connection_authenticated; 5566 #ifdef ENABLE_CLASSIC 5567 case BD_ADDR_TYPE_SCO: 5568 case BD_ADDR_TYPE_ACL: 5569 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5570 #endif 5571 default: 5572 return 0; 5573 } 5574 } 5575 5576 int gap_secure_connection(hci_con_handle_t con_handle){ 5577 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5578 if (hci_connection == NULL) return 0; 5579 5580 switch (hci_connection->address_type){ 5581 case BD_ADDR_TYPE_LE_PUBLIC: 5582 case BD_ADDR_TYPE_LE_RANDOM: 5583 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5584 return hci_connection->sm_connection.sm_connection_sc; 5585 #ifdef ENABLE_CLASSIC 5586 case BD_ADDR_TYPE_SCO: 5587 case BD_ADDR_TYPE_ACL: 5588 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5589 #endif 5590 default: 5591 return 0; 5592 } 5593 } 5594 5595 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5596 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5597 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5598 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5599 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5600 return sm_conn->sm_connection_authorization_state; 5601 } 5602 #endif 5603 5604 #ifdef ENABLE_CLASSIC 5605 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){ 5606 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5607 if (!conn) return GAP_CONNECTION_INVALID; 5608 conn->sniff_min_interval = sniff_min_interval; 5609 conn->sniff_max_interval = sniff_max_interval; 5610 conn->sniff_attempt = sniff_attempt; 5611 conn->sniff_timeout = sniff_timeout; 5612 hci_run(); 5613 return 0; 5614 } 5615 5616 /** 5617 * @brief Exit Sniff mode 5618 * @param con_handle 5619 @ @return 0 if ok 5620 */ 5621 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5622 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5623 if (!conn) return GAP_CONNECTION_INVALID; 5624 conn->sniff_min_interval = 0xffff; 5625 hci_run(); 5626 return 0; 5627 } 5628 #endif 5629 5630 void hci_halting_defer(void){ 5631 if (hci_stack->state != HCI_STATE_HALTING) return; 5632 switch (hci_stack->substate){ 5633 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5634 case HCI_HALTING_CLOSE: 5635 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5636 break; 5637 default: 5638 break; 5639 } 5640 } 5641 5642 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5643 void hci_setup_test_connections_fuzz(void){ 5644 hci_connection_t * conn; 5645 5646 // default address: 66:55:44:33:00:01 5647 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5648 5649 // setup Controller info 5650 hci_stack->num_cmd_packets = 255; 5651 hci_stack->acl_packets_total_num = 255; 5652 5653 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5654 addr[5] = 0x01; 5655 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5656 conn->con_handle = addr[5]; 5657 conn->role = HCI_ROLE_SLAVE; 5658 conn->state = RECEIVED_CONNECTION_REQUEST; 5659 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5660 5661 // setup incoming Classic SCO connection with con handle 0x0002 5662 addr[5] = 0x02; 5663 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5664 conn->con_handle = addr[5]; 5665 conn->role = HCI_ROLE_SLAVE; 5666 conn->state = RECEIVED_CONNECTION_REQUEST; 5667 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5668 5669 // setup ready Classic ACL connection with con handle 0x0003 5670 addr[5] = 0x03; 5671 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5672 conn->con_handle = addr[5]; 5673 conn->role = HCI_ROLE_SLAVE; 5674 conn->state = OPEN; 5675 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5676 5677 // setup ready Classic SCO connection with con handle 0x0004 5678 addr[5] = 0x04; 5679 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5680 conn->con_handle = addr[5]; 5681 conn->role = HCI_ROLE_SLAVE; 5682 conn->state = OPEN; 5683 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5684 5685 // setup ready LE ACL connection with con handle 0x005 and public address 5686 addr[5] = 0x05; 5687 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5688 conn->con_handle = addr[5]; 5689 conn->role = HCI_ROLE_SLAVE; 5690 conn->state = OPEN; 5691 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5692 } 5693 5694 void hci_free_connections_fuzz(void){ 5695 btstack_linked_list_iterator_t it; 5696 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5697 while (btstack_linked_list_iterator_has_next(&it)){ 5698 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5699 btstack_linked_list_iterator_remove(&it); 5700 btstack_memory_hci_connection_free(con); 5701 } 5702 } 5703 void hci_simulate_working_fuzz(void){ 5704 hci_init_done(); 5705 hci_stack->num_cmd_packets = 255; 5706 } 5707 #endif 5708