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 <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static void hci_notify_if_sco_can_send_now(void); 137 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 138 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 139 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 140 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 141 static void hci_connection_timestamp(hci_connection_t *connection); 142 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 143 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 144 #endif 145 146 static int hci_power_control_on(void); 147 static void hci_power_control_off(void); 148 static void hci_state_reset(void); 149 static void hci_emit_transport_packet_sent(void); 150 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 151 static void hci_emit_nr_connections_changed(void); 152 static void hci_emit_hci_open_failed(void); 153 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 154 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 155 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 156 static void hci_run(void); 157 static int hci_is_le_connection(hci_connection_t * connection); 158 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 159 160 #ifdef ENABLE_CLASSIC 161 static int hci_have_usb_transport(void); 162 #endif 163 164 #ifdef ENABLE_BLE 165 #ifdef ENABLE_LE_CENTRAL 166 // called from test/ble_client/advertising_data_parser.c 167 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 168 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 169 static hci_connection_t * gap_get_outgoing_connection(void); 170 #endif 171 #endif 172 173 // the STACK is here 174 #ifndef HAVE_MALLOC 175 static hci_stack_t hci_stack_static; 176 #endif 177 static hci_stack_t * hci_stack = NULL; 178 179 #ifdef ENABLE_CLASSIC 180 // default name 181 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 182 183 // test helper 184 static uint8_t disable_l2cap_timeouts = 0; 185 #endif 186 187 /** 188 * create connection for given address 189 * 190 * @return connection OR NULL, if no memory left 191 */ 192 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 193 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 194 hci_connection_t * conn = btstack_memory_hci_connection_get(); 195 if (!conn) return NULL; 196 bd_addr_copy(conn->address, addr); 197 conn->address_type = addr_type; 198 conn->con_handle = 0xffff; 199 conn->authentication_flags = AUTH_FLAGS_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 204 btstack_run_loop_set_timer_context(&conn->timeout, conn); 205 hci_connection_timestamp(conn); 206 #endif 207 conn->acl_recombination_length = 0; 208 conn->acl_recombination_pos = 0; 209 conn->num_packets_sent = 0; 210 211 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 212 #ifdef ENABLE_BLE 213 conn->le_phy_update_all_phys = 0xff; 214 #endif 215 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 216 conn->le_max_tx_octets = 27; 217 #endif 218 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 219 return conn; 220 } 221 222 223 /** 224 * get le connection parameter range 225 * 226 * @return le connection parameter range struct 227 */ 228 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 229 *range = hci_stack->le_connection_parameter_range; 230 } 231 232 /** 233 * set le connection parameter range 234 * 235 */ 236 237 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 238 hci_stack->le_connection_parameter_range = *range; 239 } 240 241 /** 242 * @brief Test if connection parameters are inside in existing rage 243 * @param conn_interval_min (unit: 1.25ms) 244 * @param conn_interval_max (unit: 1.25ms) 245 * @param conn_latency 246 * @param supervision_timeout (unit: 10ms) 247 * @returns 1 if included 248 */ 249 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 250 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 251 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 252 253 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 254 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 255 256 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 257 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 258 259 return 1; 260 } 261 262 /** 263 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 264 * @note: default: 1 265 * @param max_peripheral_connections 266 */ 267 #ifdef ENABLE_LE_PERIPHERAL 268 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 269 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 270 } 271 #endif 272 273 /** 274 * get hci connections iterator 275 * 276 * @return hci connections iterator 277 */ 278 279 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 280 btstack_linked_list_iterator_init(it, &hci_stack->connections); 281 } 282 283 /** 284 * get connection for a given handle 285 * 286 * @return connection OR NULL, if not found 287 */ 288 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 289 btstack_linked_list_iterator_t it; 290 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 291 while (btstack_linked_list_iterator_has_next(&it)){ 292 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 293 if ( item->con_handle == con_handle ) { 294 return item; 295 } 296 } 297 return NULL; 298 } 299 300 /** 301 * get connection for given address 302 * 303 * @return connection OR NULL, if not found 304 */ 305 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 306 btstack_linked_list_iterator_t it; 307 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 308 while (btstack_linked_list_iterator_has_next(&it)){ 309 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 310 if (connection->address_type != addr_type) continue; 311 if (memcmp(addr, connection->address, 6) != 0) continue; 312 return connection; 313 } 314 return NULL; 315 } 316 317 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 318 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 319 } 320 321 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 322 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 323 } 324 325 #ifdef ENABLE_CLASSIC 326 327 #ifdef ENABLE_SCO_OVER_HCI 328 static int hci_number_sco_connections(void){ 329 int connections = 0; 330 btstack_linked_list_iterator_t it; 331 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 332 while (btstack_linked_list_iterator_has_next(&it)){ 333 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 334 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 335 connections++; 336 } 337 return connections; 338 } 339 #endif 340 341 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 342 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 343 #ifdef HAVE_EMBEDDED_TICK 344 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 345 // connections might be timed out 346 hci_emit_l2cap_check_timeout(connection); 347 } 348 #else 349 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 350 // connections might be timed out 351 hci_emit_l2cap_check_timeout(connection); 352 } 353 #endif 354 } 355 356 static void hci_connection_timestamp(hci_connection_t *connection){ 357 #ifdef HAVE_EMBEDDED_TICK 358 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 359 #else 360 connection->timestamp = btstack_run_loop_get_time_ms(); 361 #endif 362 } 363 364 /** 365 * add authentication flags and reset timer 366 * @note: assumes classic connection 367 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 368 */ 369 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 370 bd_addr_t addr; 371 reverse_bd_addr(bd_addr, addr); 372 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 373 if (conn) { 374 connectionSetAuthenticationFlags(conn, flags); 375 hci_connection_timestamp(conn); 376 } 377 } 378 379 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 380 hci_connection_t * conn = hci_connection_for_handle(handle); 381 if (!conn) return 0; 382 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 383 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 384 return 0; 385 } 386 387 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 390 hci_stack->link_key_db->delete_link_key(addr); 391 } 392 393 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 394 if (!hci_stack->link_key_db) return; 395 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 396 hci_stack->link_key_db->put_link_key(addr, link_key, type); 397 } 398 399 void gap_delete_all_link_keys(void){ 400 bd_addr_t addr; 401 link_key_t link_key; 402 link_key_type_t type; 403 btstack_link_key_iterator_t it; 404 int ok = gap_link_key_iterator_init(&it); 405 if (!ok) { 406 log_error("could not initialize iterator"); 407 return; 408 } 409 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 410 gap_drop_link_key_for_bd_addr(addr); 411 } 412 gap_link_key_iterator_done(&it); 413 } 414 415 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 416 if (!hci_stack->link_key_db) return 0; 417 if (!hci_stack->link_key_db->iterator_init) return 0; 418 return hci_stack->link_key_db->iterator_init(it); 419 } 420 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 421 if (!hci_stack->link_key_db) return 0; 422 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 423 } 424 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 425 if (!hci_stack->link_key_db) return; 426 hci_stack->link_key_db->iterator_done(it); 427 } 428 #endif 429 430 static int hci_is_le_connection(hci_connection_t * connection){ 431 switch (connection->address_type){ 432 case BD_ADDR_TYPE_LE_PUBLIC: 433 case BD_ADDR_TYPE_LE_RANDOM: 434 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 436 return 1; 437 default: 438 return 0; 439 } 440 } 441 442 /** 443 * count connections 444 */ 445 static int nr_hci_connections(void){ 446 int count = 0; 447 btstack_linked_item_t *it; 448 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 449 count++; 450 } 451 return count; 452 } 453 454 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 455 456 unsigned int num_packets_sent_classic = 0; 457 unsigned int num_packets_sent_le = 0; 458 459 btstack_linked_item_t *it; 460 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 461 hci_connection_t * connection = (hci_connection_t *) it; 462 if (hci_is_le_connection(connection)){ 463 num_packets_sent_le += connection->num_packets_sent; 464 } 465 if (connection->address_type == BD_ADDR_TYPE_ACL){ 466 num_packets_sent_classic += connection->num_packets_sent; 467 } 468 } 469 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 470 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 471 int free_slots_le = 0; 472 473 if (free_slots_classic < 0){ 474 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 475 return 0; 476 } 477 478 if (hci_stack->le_acl_packets_total_num){ 479 // if we have LE slots, they are used 480 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 481 if (free_slots_le < 0){ 482 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 483 return 0; 484 } 485 } else { 486 // otherwise, classic slots are used for LE, too 487 free_slots_classic -= num_packets_sent_le; 488 if (free_slots_classic < 0){ 489 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 490 return 0; 491 } 492 } 493 494 switch (address_type){ 495 case BD_ADDR_TYPE_UNKNOWN: 496 log_error("hci_number_free_acl_slots: unknown address type"); 497 return 0; 498 499 case BD_ADDR_TYPE_ACL: 500 return free_slots_classic; 501 502 default: 503 if (hci_stack->le_acl_packets_total_num){ 504 return free_slots_le; 505 } 506 return free_slots_classic; 507 } 508 } 509 510 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 511 // get connection type 512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 513 if (!connection){ 514 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 515 return 0; 516 } 517 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 518 } 519 520 #ifdef ENABLE_CLASSIC 521 static int hci_number_free_sco_slots(void){ 522 unsigned int num_sco_packets_sent = 0; 523 btstack_linked_item_t *it; 524 if (hci_stack->synchronous_flow_control_enabled){ 525 // explicit flow control 526 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 527 hci_connection_t * connection = (hci_connection_t *) it; 528 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 529 num_sco_packets_sent += connection->num_packets_sent; 530 } 531 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 532 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 533 return 0; 534 } 535 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 536 } else { 537 // implicit flow control -- TODO 538 int num_ready = 0; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 540 hci_connection_t * connection = (hci_connection_t *) it; 541 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 542 if (connection->sco_tx_ready == 0) continue; 543 num_ready++; 544 } 545 return num_ready; 546 } 547 } 548 #endif 549 550 // only used to send HCI Host Number Completed Packets 551 static int hci_can_send_comand_packet_transport(void){ 552 if (hci_stack->hci_packet_buffer_reserved) return 0; 553 554 // check for async hci transport implementations 555 if (hci_stack->hci_transport->can_send_packet_now){ 556 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 557 return 0; 558 } 559 } 560 return 1; 561 } 562 563 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 564 int hci_can_send_command_packet_now(void){ 565 if (hci_can_send_comand_packet_transport() == 0) return 0; 566 return hci_stack->num_cmd_packets > 0; 567 } 568 569 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 570 // check for async hci transport implementations 571 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 572 return hci_stack->hci_transport->can_send_packet_now(packet_type); 573 } 574 575 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 576 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 577 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 578 } 579 580 int hci_can_send_acl_le_packet_now(void){ 581 if (hci_stack->hci_packet_buffer_reserved) return 0; 582 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 583 } 584 585 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 586 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 587 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 588 } 589 590 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_now(con_handle); 593 } 594 595 #ifdef ENABLE_CLASSIC 596 int hci_can_send_acl_classic_packet_now(void){ 597 if (hci_stack->hci_packet_buffer_reserved) return 0; 598 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 599 } 600 601 int hci_can_send_prepared_sco_packet_now(void){ 602 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 603 if (hci_have_usb_transport()){ 604 return hci_stack->sco_can_send_now; 605 } else { 606 return hci_number_free_sco_slots() > 0; 607 } 608 } 609 610 int hci_can_send_sco_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_sco_packet_now(); 613 } 614 615 void hci_request_sco_can_send_now_event(void){ 616 hci_stack->sco_waiting_for_can_send_now = 1; 617 hci_notify_if_sco_can_send_now(); 618 } 619 #endif 620 621 // used for internal checks in l2cap.c 622 int hci_is_packet_buffer_reserved(void){ 623 return hci_stack->hci_packet_buffer_reserved; 624 } 625 626 // reserves outgoing packet buffer. @returns 1 if successful 627 int hci_reserve_packet_buffer(void){ 628 if (hci_stack->hci_packet_buffer_reserved) { 629 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 630 return 0; 631 } 632 hci_stack->hci_packet_buffer_reserved = 1; 633 return 1; 634 } 635 636 void hci_release_packet_buffer(void){ 637 hci_stack->hci_packet_buffer_reserved = 0; 638 } 639 640 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 641 static int hci_transport_synchronous(void){ 642 return hci_stack->hci_transport->can_send_packet_now == NULL; 643 } 644 645 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 646 647 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 648 649 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 650 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 651 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 652 max_acl_data_packet_length = hci_stack->le_data_packets_length; 653 } 654 655 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 656 if (hci_is_le_connection(connection)){ 657 max_acl_data_packet_length = connection->le_max_tx_octets; 658 } 659 #endif 660 661 log_debug("hci_send_acl_packet_fragments entered"); 662 663 int err; 664 // multiple packets could be send on a synchronous HCI transport 665 while (true){ 666 667 log_debug("hci_send_acl_packet_fragments loop entered"); 668 669 // get current data 670 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 671 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 672 int more_fragments = 0; 673 674 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 675 if (current_acl_data_packet_length > max_acl_data_packet_length){ 676 more_fragments = 1; 677 current_acl_data_packet_length = max_acl_data_packet_length; 678 } 679 680 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 681 if (acl_header_pos > 0){ 682 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 683 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 684 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 685 } 686 687 // update header len 688 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 689 690 // count packet 691 connection->num_packets_sent++; 692 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 693 694 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 695 if (more_fragments){ 696 // update start of next fragment to send 697 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 698 } else { 699 // done 700 hci_stack->acl_fragmentation_pos = 0; 701 hci_stack->acl_fragmentation_total_size = 0; 702 } 703 704 // send packet 705 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 706 const int size = current_acl_data_packet_length + 4; 707 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 708 hci_stack->acl_fragmentation_tx_active = 1; 709 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 710 711 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 712 713 // done yet? 714 if (!more_fragments) break; 715 716 // can send more? 717 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 718 } 719 720 log_debug("hci_send_acl_packet_fragments loop over"); 721 722 // release buffer now for synchronous transport 723 if (hci_transport_synchronous()){ 724 hci_stack->acl_fragmentation_tx_active = 0; 725 hci_release_packet_buffer(); 726 hci_emit_transport_packet_sent(); 727 } 728 729 return err; 730 } 731 732 // pre: caller has reserved the packet buffer 733 int hci_send_acl_packet_buffer(int size){ 734 735 // log_info("hci_send_acl_packet_buffer size %u", size); 736 737 if (!hci_stack->hci_packet_buffer_reserved) { 738 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 739 return 0; 740 } 741 742 uint8_t * packet = hci_stack->hci_packet_buffer; 743 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 744 745 // check for free places on Bluetooth module 746 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 747 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 748 hci_release_packet_buffer(); 749 hci_emit_transport_packet_sent(); 750 return BTSTACK_ACL_BUFFERS_FULL; 751 } 752 753 hci_connection_t *connection = hci_connection_for_handle( con_handle); 754 if (!connection) { 755 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 756 hci_release_packet_buffer(); 757 hci_emit_transport_packet_sent(); 758 return 0; 759 } 760 761 #ifdef ENABLE_CLASSIC 762 hci_connection_timestamp(connection); 763 #endif 764 765 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 766 767 // setup data 768 hci_stack->acl_fragmentation_total_size = size; 769 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 770 771 return hci_send_acl_packet_fragments(connection); 772 } 773 774 #ifdef ENABLE_CLASSIC 775 // pre: caller has reserved the packet buffer 776 int hci_send_sco_packet_buffer(int size){ 777 778 // log_info("hci_send_acl_packet_buffer size %u", size); 779 780 if (!hci_stack->hci_packet_buffer_reserved) { 781 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 782 return 0; 783 } 784 785 uint8_t * packet = hci_stack->hci_packet_buffer; 786 787 // skip checks in loopback mode 788 if (!hci_stack->loopback_mode){ 789 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 790 791 // check for free places on Bluetooth module 792 if (!hci_can_send_prepared_sco_packet_now()) { 793 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return BTSTACK_ACL_BUFFERS_FULL; 797 } 798 799 // track send packet in connection struct 800 hci_connection_t *connection = hci_connection_for_handle( con_handle); 801 if (!connection) { 802 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 803 hci_release_packet_buffer(); 804 hci_emit_transport_packet_sent(); 805 return 0; 806 } 807 808 if (hci_have_usb_transport()){ 809 // token used 810 hci_stack->sco_can_send_now = 0; 811 } else { 812 if (hci_stack->synchronous_flow_control_enabled){ 813 connection->num_packets_sent++; 814 } else { 815 connection->sco_tx_ready--; 816 } 817 } 818 } 819 820 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 821 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 822 823 if (hci_transport_synchronous()){ 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 } 827 828 return err; 829 } 830 #endif 831 832 static void acl_handler(uint8_t *packet, int size){ 833 834 // log_info("acl_handler: size %u", size); 835 836 // get info 837 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 838 hci_connection_t *conn = hci_connection_for_handle(con_handle); 839 uint8_t acl_flags = READ_ACL_FLAGS(packet); 840 uint16_t acl_length = READ_ACL_LENGTH(packet); 841 842 // ignore non-registered handle 843 if (!conn){ 844 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 845 return; 846 } 847 848 // assert packet is complete 849 if ((acl_length + 4) != size){ 850 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 851 return; 852 } 853 854 #ifdef ENABLE_CLASSIC 855 // update idle timestamp 856 hci_connection_timestamp(conn); 857 #endif 858 859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 860 hci_stack->host_completed_packets = 1; 861 conn->num_packets_completed++; 862 #endif 863 864 // handle different packet types 865 switch (acl_flags & 0x03) { 866 867 case 0x01: // continuation fragment 868 869 // sanity checks 870 if (conn->acl_recombination_pos == 0) { 871 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 872 return; 873 } 874 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 875 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 876 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 877 conn->acl_recombination_pos = 0; 878 return; 879 } 880 881 // append fragment payload (header already stored) 882 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 883 &packet[4], acl_length); 884 conn->acl_recombination_pos += acl_length; 885 886 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 887 // conn->acl_recombination_pos, conn->acl_recombination_length); 888 889 // forward complete L2CAP packet if complete. 890 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 891 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 892 // reset recombination buffer 893 conn->acl_recombination_length = 0; 894 conn->acl_recombination_pos = 0; 895 } 896 break; 897 898 case 0x02: { // first fragment 899 900 // sanity check 901 if (conn->acl_recombination_pos) { 902 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 903 conn->acl_recombination_pos = 0; 904 } 905 906 // peek into L2CAP packet! 907 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 908 909 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 910 911 // compare fragment size to L2CAP packet size 912 if (acl_length >= (l2cap_length + 4)){ 913 // forward fragment as L2CAP packet 914 hci_emit_acl_packet(packet, acl_length + 4); 915 } else { 916 917 if (acl_length > HCI_ACL_BUFFER_SIZE){ 918 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 919 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 920 return; 921 } 922 923 // store first fragment and tweak acl length for complete package 924 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 925 packet, acl_length + 4); 926 conn->acl_recombination_pos = acl_length + 4; 927 conn->acl_recombination_length = l2cap_length; 928 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 929 } 930 break; 931 932 } 933 default: 934 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 935 return; 936 } 937 938 // execute main loop 939 hci_run(); 940 } 941 942 static void hci_shutdown_connection(hci_connection_t *conn){ 943 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 int addr_type = conn->address_type; 948 #endif 949 #endif 950 951 btstack_run_loop_remove_timer(&conn->timeout); 952 953 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 954 btstack_memory_hci_connection_free( conn ); 955 956 // now it's gone 957 hci_emit_nr_connections_changed(); 958 959 #ifdef ENABLE_CLASSIC 960 #ifdef ENABLE_SCO_OVER_HCI 961 // update SCO 962 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 963 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 964 } 965 #endif 966 #endif 967 } 968 969 #ifdef ENABLE_CLASSIC 970 971 static const uint16_t packet_type_sizes[] = { 972 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 973 HCI_ACL_DH1_SIZE, 0, 0, 0, 974 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 975 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 976 }; 977 static const uint8_t packet_type_feature_requirement_bit[] = { 978 0, // 3 slot packets 979 1, // 5 slot packets 980 25, // EDR 2 mpbs 981 26, // EDR 3 mbps 982 39, // 3 slot EDR packts 983 40, // 5 slot EDR packet 984 }; 985 static const uint16_t packet_type_feature_packet_mask[] = { 986 0x0f00, // 3 slot packets 987 0xf000, // 5 slot packets 988 0x1102, // EDR 2 mpbs 989 0x2204, // EDR 3 mbps 990 0x0300, // 3 slot EDR packts 991 0x3000, // 5 slot EDR packet 992 }; 993 994 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 995 // enable packet types based on size 996 uint16_t packet_types = 0; 997 unsigned int i; 998 for (i=0;i<16;i++){ 999 if (packet_type_sizes[i] == 0) continue; 1000 if (packet_type_sizes[i] <= buffer_size){ 1001 packet_types |= 1 << i; 1002 } 1003 } 1004 // disable packet types due to missing local supported features 1005 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1006 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1007 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1008 if (feature_set) continue; 1009 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1010 packet_types &= ~packet_type_feature_packet_mask[i]; 1011 } 1012 // flip bits for "may not be used" 1013 packet_types ^= 0x3306; 1014 return packet_types; 1015 } 1016 1017 uint16_t hci_usable_acl_packet_types(void){ 1018 return hci_stack->packet_types; 1019 } 1020 #endif 1021 1022 uint8_t* hci_get_outgoing_packet_buffer(void){ 1023 // hci packet buffer is >= acl data packet length 1024 return hci_stack->hci_packet_buffer; 1025 } 1026 1027 uint16_t hci_max_acl_data_packet_length(void){ 1028 return hci_stack->acl_data_packet_length; 1029 } 1030 1031 #ifdef ENABLE_CLASSIC 1032 int hci_extended_sco_link_supported(void){ 1033 // No. 31, byte 3, bit 7 1034 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1035 } 1036 #endif 1037 1038 int hci_non_flushable_packet_boundary_flag_supported(void){ 1039 // No. 54, byte 6, bit 6 1040 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1041 } 1042 1043 static int gap_ssp_supported(void){ 1044 // No. 51, byte 6, bit 3 1045 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1046 } 1047 1048 static int hci_classic_supported(void){ 1049 #ifdef ENABLE_CLASSIC 1050 // No. 37, byte 4, bit 5, = No BR/EDR Support 1051 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 static int hci_le_supported(void){ 1058 #ifdef ENABLE_BLE 1059 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1060 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1061 #else 1062 return 0; 1063 #endif 1064 } 1065 1066 #ifdef ENABLE_BLE 1067 1068 /** 1069 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1070 */ 1071 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1072 *addr_type = hci_stack->le_own_addr_type; 1073 if (hci_stack->le_own_addr_type){ 1074 (void)memcpy(addr, hci_stack->le_random_address, 6); 1075 } else { 1076 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1077 } 1078 } 1079 1080 #ifdef ENABLE_LE_CENTRAL 1081 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1082 1083 int offset = 3; 1084 int num_reports = packet[offset]; 1085 offset += 1; 1086 1087 int i; 1088 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1089 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1090 for (i=0; (i<num_reports) && (offset < size);i++){ 1091 // sanity checks on data_length: 1092 uint8_t data_length = packet[offset + 8]; 1093 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1094 if ((offset + 9 + data_length + 1) > size) return; 1095 // setup event 1096 uint8_t event_size = 10 + data_length; 1097 int pos = 0; 1098 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1099 event[pos++] = event_size; 1100 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1101 offset += 8; 1102 pos += 8; 1103 event[pos++] = packet[offset + 1 + data_length]; // rssi 1104 event[pos++] = data_length; 1105 offset++; 1106 (void)memcpy(&event[pos], &packet[offset], data_length); 1107 pos += data_length; 1108 offset += data_length + 1; // rssi 1109 hci_emit_event(event, pos, 1); 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #ifdef ENABLE_BLE 1116 #ifdef ENABLE_LE_PERIPHERAL 1117 static void hci_reenable_advertisements_if_needed(void){ 1118 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1119 // get number of active le slave connections 1120 int num_slave_connections = 0; 1121 btstack_linked_list_iterator_t it; 1122 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1123 while (btstack_linked_list_iterator_has_next(&it)){ 1124 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1125 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1126 if (con->state != OPEN) continue; 1127 if (con->role != HCI_ROLE_SLAVE) continue; 1128 if (!hci_is_le_connection(con)) continue; 1129 num_slave_connections++; 1130 } 1131 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1132 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1133 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1134 } 1135 } 1136 } 1137 #endif 1138 #endif 1139 1140 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1141 1142 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1143 if (!hci_stack->config) return 0; 1144 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1145 // Limit baud rate for Broadcom chipsets to 3 mbps 1146 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1147 baud_rate = 3000000; 1148 } 1149 return baud_rate; 1150 } 1151 1152 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1153 UNUSED(ds); 1154 1155 switch (hci_stack->substate){ 1156 case HCI_INIT_W4_SEND_RESET: 1157 log_info("Resend HCI Reset"); 1158 hci_stack->substate = HCI_INIT_SEND_RESET; 1159 hci_stack->num_cmd_packets = 1; 1160 hci_run(); 1161 break; 1162 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1163 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1164 if (hci_stack->hci_transport->reset_link){ 1165 hci_stack->hci_transport->reset_link(); 1166 } 1167 1168 /* fall through */ 1169 1170 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1171 log_info("Resend HCI Reset - CSR Warm Boot"); 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_stack->num_cmd_packets = 1; 1174 hci_run(); 1175 break; 1176 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1177 if (hci_stack->hci_transport->set_baudrate){ 1178 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1179 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1180 hci_stack->hci_transport->set_baudrate(baud_rate); 1181 } 1182 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1183 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1184 if (hci_stack->hci_transport->reset_link){ 1185 log_info("Link Reset"); 1186 hci_stack->hci_transport->reset_link(); 1187 } 1188 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1189 hci_run(); 1190 } 1191 break; 1192 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1193 // otherwise continue 1194 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1195 hci_send_cmd(&hci_read_local_supported_commands); 1196 break; 1197 default: 1198 break; 1199 } 1200 } 1201 #endif 1202 1203 static void hci_initializing_next_state(void){ 1204 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1205 } 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3 + hci_stack->hci_packet_buffer[2]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1315 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 uint16_t bcm_delay_ms = 300; 1330 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1331 // -> Work around: wait here. 1332 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1422 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1423 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1424 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1425 // expand '00:00:00:00:00:00' in name with bd_addr 1426 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1427 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1428 break; 1429 } 1430 case HCI_INIT_WRITE_EIR_DATA: { 1431 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1432 hci_reserve_packet_buffer(); 1433 uint8_t * packet = hci_stack->hci_packet_buffer; 1434 // construct HCI Command in-place and send 1435 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1436 hci_stack->last_cmd_opcode = opcode; 1437 uint16_t offset = 0; 1438 packet[offset++] = opcode & 0xff; 1439 packet[offset++] = opcode >> 8; 1440 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1441 packet[offset++] = 0; // FEC not required 1442 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 if (hci_stack->eir_data){ 1444 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1445 ad_context_t context; 1446 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1447 uint8_t data_type = ad_iterator_get_data_type(&context); 1448 uint8_t size = ad_iterator_get_data_len(&context); 1449 const uint8_t *data = ad_iterator_get_data(&context); 1450 // copy item 1451 packet[offset++] = size + 1; 1452 packet[offset++] = data_type; 1453 memcpy(&packet[offset], data, size); 1454 // update name item 1455 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1456 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1457 } 1458 offset += size; 1459 } 1460 } else { 1461 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1462 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1463 packet[offset++] = bytes_to_copy + 1; 1464 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1465 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1466 // expand '00:00:00:00:00:00' in name with bd_addr 1467 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1468 } 1469 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 break; 1471 } 1472 case HCI_INIT_WRITE_INQUIRY_MODE: 1473 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1474 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1475 break; 1476 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1477 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1478 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1479 break; 1480 case HCI_INIT_WRITE_SCAN_ENABLE: 1481 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1482 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1483 break; 1484 // only sent if ENABLE_SCO_OVER_HCI is defined 1485 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1487 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1488 break; 1489 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1491 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1492 break; 1493 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1494 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1495 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1496 log_info("BCM: Route SCO data via HCI transport"); 1497 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1498 break; 1499 1500 #endif 1501 #ifdef ENABLE_BLE 1502 // LE INIT 1503 case HCI_INIT_LE_READ_BUFFER_SIZE: 1504 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1505 hci_send_cmd(&hci_le_read_buffer_size); 1506 break; 1507 case HCI_INIT_LE_SET_EVENT_MASK: 1508 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1509 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1510 break; 1511 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1512 // LE Supported Host = 1, Simultaneous Host = 0 1513 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1514 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1515 break; 1516 #endif 1517 1518 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1519 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1520 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1521 hci_send_cmd(&hci_le_read_maximum_data_length); 1522 break; 1523 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1524 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1525 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1526 break; 1527 #endif 1528 1529 #ifdef ENABLE_LE_CENTRAL 1530 case HCI_INIT_READ_WHITE_LIST_SIZE: 1531 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1532 hci_send_cmd(&hci_le_read_white_list_size); 1533 break; 1534 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1535 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1536 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1537 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); 1538 break; 1539 #endif 1540 default: 1541 return; 1542 } 1543 } 1544 1545 static void hci_init_done(void){ 1546 // done. tell the app 1547 log_info("hci_init_done -> HCI_STATE_WORKING"); 1548 hci_stack->state = HCI_STATE_WORKING; 1549 hci_emit_state(); 1550 hci_run(); 1551 } 1552 1553 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1554 bool command_completed = false; 1555 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1556 uint16_t opcode = little_endian_read_16(packet,3); 1557 if (opcode == hci_stack->last_cmd_opcode){ 1558 command_completed = true; 1559 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1560 } else { 1561 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1562 } 1563 } 1564 1565 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1566 uint8_t status = packet[2]; 1567 uint16_t opcode = little_endian_read_16(packet,4); 1568 if (opcode == hci_stack->last_cmd_opcode){ 1569 if (status){ 1570 command_completed = true; 1571 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1572 } else { 1573 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1574 } 1575 } else { 1576 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1577 } 1578 } 1579 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1580 // Vendor == CSR 1581 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1582 // TODO: track actual command 1583 command_completed = true; 1584 } 1585 1586 // Vendor == Toshiba 1587 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1588 // TODO: track actual command 1589 command_completed = true; 1590 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1591 hci_stack->num_cmd_packets = 1; 1592 } 1593 #endif 1594 1595 return command_completed; 1596 } 1597 1598 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1599 1600 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1601 1602 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1603 1604 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1605 1606 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1607 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1608 // 1609 // HCI Reset 1610 // Timeout 100 ms 1611 // HCI Reset 1612 // Command Complete Reset 1613 // HCI Read Local Version Information 1614 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1615 // hang... 1616 // 1617 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1618 if (!command_completed 1619 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1620 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1621 1622 uint16_t opcode = little_endian_read_16(packet,3); 1623 if (opcode == hci_reset.opcode){ 1624 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1625 return; 1626 } 1627 } 1628 1629 // CSR & H5 1630 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1631 if (!command_completed 1632 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1633 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1634 1635 uint16_t opcode = little_endian_read_16(packet,3); 1636 if (opcode == hci_reset.opcode){ 1637 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1638 return; 1639 } 1640 } 1641 1642 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1643 // fix: Correct substate and behave as command below 1644 if (command_completed){ 1645 switch (hci_stack->substate){ 1646 case HCI_INIT_SEND_RESET: 1647 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1648 break; 1649 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1650 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1651 break; 1652 default: 1653 break; 1654 } 1655 } 1656 1657 #endif 1658 1659 if (!command_completed) return; 1660 1661 bool need_baud_change = false; 1662 bool need_addr_change = false; 1663 1664 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1665 need_baud_change = hci_stack->config 1666 && hci_stack->chipset 1667 && hci_stack->chipset->set_baudrate_command 1668 && hci_stack->hci_transport->set_baudrate 1669 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1670 1671 need_addr_change = hci_stack->custom_bd_addr_set 1672 && hci_stack->chipset 1673 && hci_stack->chipset->set_bd_addr_command; 1674 #endif 1675 1676 switch(hci_stack->substate){ 1677 1678 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1679 case HCI_INIT_SEND_RESET: 1680 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1681 // fix: just correct substate and behave as command below 1682 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1683 btstack_run_loop_remove_timer(&hci_stack->timeout); 1684 break; 1685 case HCI_INIT_W4_SEND_RESET: 1686 btstack_run_loop_remove_timer(&hci_stack->timeout); 1687 break; 1688 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1689 log_info("Received local name, need baud change %d", (int) need_baud_change); 1690 if (need_baud_change){ 1691 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1692 return; 1693 } 1694 // skip baud change 1695 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1696 return; 1697 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1698 // for STLC2500D, baud rate change already happened. 1699 // for others, baud rate gets changed now 1700 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1701 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1702 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1703 hci_stack->hci_transport->set_baudrate(baud_rate); 1704 } 1705 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1706 return; 1707 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1708 btstack_run_loop_remove_timer(&hci_stack->timeout); 1709 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1710 return; 1711 case HCI_INIT_W4_CUSTOM_INIT: 1712 // repeat custom init 1713 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1714 return; 1715 #else 1716 case HCI_INIT_W4_SEND_RESET: 1717 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1718 return ; 1719 #endif 1720 1721 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1722 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1723 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1724 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1725 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1726 return; 1727 } 1728 if (need_addr_change){ 1729 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1730 return; 1731 } 1732 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1733 return; 1734 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1735 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1736 if (need_baud_change){ 1737 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1738 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1739 hci_stack->hci_transport->set_baudrate(baud_rate); 1740 } 1741 if (need_addr_change){ 1742 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1743 return; 1744 } 1745 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1746 return; 1747 case HCI_INIT_W4_SET_BD_ADDR: 1748 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1749 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1750 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1751 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1752 return; 1753 } 1754 // skipping st warm boot 1755 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1756 return; 1757 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1758 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1759 return; 1760 #endif 1761 case HCI_INIT_W4_READ_BD_ADDR: 1762 // only read buffer size if supported 1763 if (hci_stack->local_supported_commands[0] & 0x01) { 1764 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1765 return; 1766 } 1767 // skipping read buffer size 1768 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1769 return; 1770 case HCI_INIT_W4_SET_EVENT_MASK: 1771 // skip Classic init commands for LE only chipsets 1772 if (!hci_classic_supported()){ 1773 #ifdef ENABLE_BLE 1774 if (hci_le_supported()){ 1775 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1776 return; 1777 } 1778 #endif 1779 log_error("Neither BR/EDR nor LE supported"); 1780 hci_init_done(); 1781 return; 1782 } 1783 if (!gap_ssp_supported()){ 1784 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1785 return; 1786 } 1787 break; 1788 #ifdef ENABLE_BLE 1789 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1790 // skip write le host if not supported (e.g. on LE only EM9301) 1791 if (hci_stack->local_supported_commands[0] & 0x02) break; 1792 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1793 return; 1794 1795 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1796 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1797 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1798 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1799 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1800 return; 1801 } 1802 // explicit fall through to reduce repetitions 1803 1804 #ifdef ENABLE_LE_CENTRAL 1805 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1806 #else 1807 hci_init_done(); 1808 #endif 1809 return; 1810 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1811 1812 #endif /* ENABLE_BLE */ 1813 1814 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1815 // skip write secure connections host support if not supported or disabled 1816 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1] & 0x02) == 0) { 1817 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1818 return; 1819 } 1820 break; 1821 1822 #ifdef ENABLE_SCO_OVER_HCI 1823 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1824 // skip write synchronous flow control if not supported 1825 if (hci_stack->local_supported_commands[0] & 0x04) break; 1826 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1827 1828 /* fall through */ 1829 1830 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1831 // skip write default erroneous data reporting if not supported 1832 if (hci_stack->local_supported_commands[0] & 0x08) break; 1833 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1834 1835 /* fall through */ 1836 1837 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1838 // skip bcm set sco pcm config on non-Broadcom chipsets 1839 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1840 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1841 1842 /* fall through */ 1843 1844 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1845 if (!hci_le_supported()){ 1846 // SKIP LE init for Classic only configuration 1847 hci_init_done(); 1848 return; 1849 } 1850 break; 1851 1852 #else /* !ENABLE_SCO_OVER_HCI */ 1853 1854 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1855 #ifdef ENABLE_BLE 1856 if (hci_le_supported()){ 1857 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1858 return; 1859 } 1860 #endif 1861 // SKIP LE init for Classic only configuration 1862 hci_init_done(); 1863 return; 1864 #endif /* ENABLE_SCO_OVER_HCI */ 1865 1866 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1867 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1868 // Response to command before init done state -> init done 1869 case (HCI_INIT_DONE-1): 1870 hci_init_done(); 1871 return; 1872 #endif 1873 1874 default: 1875 break; 1876 } 1877 hci_initializing_next_state(); 1878 } 1879 1880 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1881 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1882 bd_addr_t bd_address; 1883 (void)memcpy(&bd_address, conn->address, 6); 1884 1885 #ifdef ENABLE_CLASSIC 1886 // cache needed data 1887 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1888 #endif 1889 1890 // connection failed, remove entry 1891 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1892 btstack_memory_hci_connection_free( conn ); 1893 1894 #ifdef ENABLE_CLASSIC 1895 // notify client if dedicated bonding 1896 if (notify_dedicated_bonding_failed){ 1897 log_info("hci notify_dedicated_bonding_failed"); 1898 hci_emit_dedicated_bonding_result(bd_address, status); 1899 } 1900 1901 // if authentication error, also delete link key 1902 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1903 gap_drop_link_key_for_bd_addr(bd_address); 1904 } 1905 #endif 1906 } 1907 1908 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1909 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1910 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1911 if (conn->bonding_flags & BONDING_DEDICATED){ 1912 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1913 } 1914 } 1915 1916 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1917 // handle BT initialization 1918 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1919 hci_initializing_event_handler(packet, size); 1920 } 1921 1922 // help with BT sleep 1923 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1924 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1925 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1926 hci_initializing_next_state(); 1927 } 1928 } 1929 1930 static void event_handler(uint8_t *packet, int size){ 1931 1932 uint16_t event_length = packet[1]; 1933 1934 // assert packet is complete 1935 if (size != (event_length + 2)){ 1936 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1937 return; 1938 } 1939 1940 bd_addr_t addr; 1941 bd_addr_type_t addr_type; 1942 hci_con_handle_t handle; 1943 hci_connection_t * conn; 1944 int i; 1945 int create_connection_cmd; 1946 1947 #ifdef ENABLE_CLASSIC 1948 uint8_t link_type; 1949 #endif 1950 1951 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1952 1953 switch (hci_event_packet_get_type(packet)) { 1954 1955 case HCI_EVENT_COMMAND_COMPLETE: 1956 // get num cmd packets - limit to 1 to reduce complexity 1957 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1958 1959 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1960 if (packet[5]) break; 1961 // terminate, name 248 chars 1962 packet[6+248] = 0; 1963 log_info("local name: %s", &packet[6]); 1964 } 1965 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1966 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1967 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1968 uint16_t acl_len = little_endian_read_16(packet, 6); 1969 uint16_t sco_len = packet[8]; 1970 1971 // determine usable ACL/SCO payload size 1972 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1973 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1974 1975 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1976 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1977 1978 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1979 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1980 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1981 } 1982 } 1983 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1984 if (packet[5] == 0){ 1985 uint8_t event[5]; 1986 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1987 event[1] = 3; 1988 (void)memcpy(&event[2], &packet[6], 3); 1989 hci_emit_event(event, sizeof(event), 1); 1990 } 1991 } 1992 #ifdef ENABLE_BLE 1993 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1994 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1995 hci_stack->le_acl_packets_total_num = packet[8]; 1996 // determine usable ACL payload size 1997 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1998 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1999 } 2000 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2001 } 2002 #endif 2003 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2004 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 2005 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2006 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2007 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); 2008 } 2009 #endif 2010 #ifdef ENABLE_LE_CENTRAL 2011 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 2012 hci_stack->le_whitelist_capacity = packet[6]; 2013 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2014 } 2015 #endif 2016 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 2017 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2018 hci_stack->local_bd_addr); 2019 log_info("Local Address, Status: 0x%02x: Addr: %s", 2020 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2021 #ifdef ENABLE_CLASSIC 2022 if (hci_stack->link_key_db){ 2023 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2024 } 2025 #endif 2026 } 2027 #ifdef ENABLE_CLASSIC 2028 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2029 hci_emit_discoverable_enabled(hci_stack->discoverable); 2030 } 2031 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2032 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2033 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2034 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2035 hci_emit_event(event, sizeof(event), 1); 2036 } 2037 } 2038 #endif 2039 2040 // Note: HCI init checks 2041 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2042 (void)memcpy(hci_stack->local_supported_features, 2043 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2044 8); 2045 2046 #ifdef ENABLE_CLASSIC 2047 // determine usable ACL packet types based on host buffer size and supported features 2048 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2049 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2050 #endif 2051 // Classic/LE 2052 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2053 } 2054 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2055 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2056 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2057 uint16_t manufacturer = little_endian_read_16(packet, 10); 2058 // map Cypress to Broadcom 2059 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2060 log_info("Treat Cypress as Broadcom"); 2061 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2062 little_endian_store_16(packet, 10, manufacturer); 2063 } 2064 hci_stack->manufacturer = manufacturer; 2065 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2066 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2067 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2068 } 2069 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2070 hci_stack->local_supported_commands[0] = 2071 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2072 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2073 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2074 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2075 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2076 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2077 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2078 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2079 hci_stack->local_supported_commands[1] = 2080 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2081 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2082 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2083 } 2084 #ifdef ENABLE_CLASSIC 2085 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2086 if (packet[5] == 0){ 2087 hci_stack->synchronous_flow_control_enabled = 1; 2088 } 2089 } 2090 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2091 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2092 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2093 conn = hci_connection_for_handle(handle); 2094 if (!conn) break; 2095 if (status == 0){ 2096 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2097 log_info("Handle %x04x key Size: %u", handle, key_size); 2098 conn->encryption_key_size = key_size; 2099 } else { 2100 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2101 conn->encryption_key_size = 1; 2102 } 2103 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2104 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2105 } 2106 #endif 2107 break; 2108 2109 case HCI_EVENT_COMMAND_STATUS: 2110 // get num cmd packets - limit to 1 to reduce complexity 2111 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2112 2113 // check command status to detected failed outgoing connections 2114 create_connection_cmd = 0; 2115 #ifdef ENABLE_CLASSIC 2116 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2117 create_connection_cmd = 1; 2118 } 2119 #endif 2120 #ifdef ENABLE_LE_CENTRAL 2121 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2122 create_connection_cmd = 1; 2123 } 2124 #endif 2125 if (create_connection_cmd) { 2126 uint8_t status = hci_event_command_status_get_status(packet); 2127 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2128 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); 2129 2130 // reset outgoing address info 2131 memset(hci_stack->outgoing_addr, 0, 6); 2132 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2133 2134 // error => outgoing connection failed 2135 if ((conn != NULL) && (status != 0)){ 2136 hci_handle_connection_failed(conn, status); 2137 } 2138 } 2139 break; 2140 2141 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2142 if (size < 3) return; 2143 uint16_t num_handles = packet[2]; 2144 if (size != (3 + num_handles * 4)) return; 2145 uint16_t offset = 3; 2146 for (i=0; i<num_handles;i++){ 2147 handle = little_endian_read_16(packet, offset) & 0x0fff; 2148 offset += 2; 2149 uint16_t num_packets = little_endian_read_16(packet, offset); 2150 offset += 2; 2151 2152 conn = hci_connection_for_handle(handle); 2153 if (!conn){ 2154 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2155 continue; 2156 } 2157 2158 if (conn->num_packets_sent >= num_packets){ 2159 conn->num_packets_sent -= num_packets; 2160 } else { 2161 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2162 conn->num_packets_sent = 0; 2163 } 2164 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2165 2166 #ifdef ENABLE_CLASSIC 2167 // For SCO, we do the can_send_now_check here 2168 hci_notify_if_sco_can_send_now(); 2169 #endif 2170 } 2171 break; 2172 } 2173 2174 #ifdef ENABLE_CLASSIC 2175 case HCI_EVENT_INQUIRY_COMPLETE: 2176 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2177 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2178 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2179 hci_emit_event(event, sizeof(event), 1); 2180 } 2181 break; 2182 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2183 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2184 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2185 } 2186 break; 2187 case HCI_EVENT_CONNECTION_REQUEST: 2188 reverse_bd_addr(&packet[2], addr); 2189 if (hci_stack->gap_classic_accept_callback != NULL){ 2190 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2191 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2192 bd_addr_copy(hci_stack->decline_addr, addr); 2193 break; 2194 } 2195 } 2196 2197 // TODO: eval COD 8-10 2198 link_type = packet[11]; 2199 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2200 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2201 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2202 if (!conn) { 2203 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2204 } 2205 if (!conn) { 2206 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2207 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2208 bd_addr_copy(hci_stack->decline_addr, addr); 2209 break; 2210 } 2211 conn->role = HCI_ROLE_SLAVE; 2212 conn->state = RECEIVED_CONNECTION_REQUEST; 2213 // store info about eSCO 2214 if (link_type == 0x02){ 2215 conn->remote_supported_features[0] |= 1; 2216 } 2217 hci_run(); 2218 break; 2219 2220 case HCI_EVENT_CONNECTION_COMPLETE: 2221 // Connection management 2222 reverse_bd_addr(&packet[5], addr); 2223 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2224 addr_type = BD_ADDR_TYPE_ACL; 2225 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2226 if (conn) { 2227 if (!packet[2]){ 2228 conn->state = OPEN; 2229 conn->con_handle = little_endian_read_16(packet, 3); 2230 2231 // queue get remote feature 2232 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2233 2234 // queue set supervision timeout if we're master 2235 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2236 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2237 } 2238 2239 // restart timer 2240 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2241 btstack_run_loop_add_timer(&conn->timeout); 2242 2243 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2244 2245 hci_emit_nr_connections_changed(); 2246 } else { 2247 // connection failed 2248 hci_handle_connection_failed(conn, packet[2]); 2249 } 2250 } 2251 break; 2252 2253 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2254 reverse_bd_addr(&packet[5], addr); 2255 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2256 if (packet[2]){ 2257 // connection failed 2258 break; 2259 } 2260 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2261 if (!conn) { 2262 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2263 } 2264 if (!conn) { 2265 break; 2266 } 2267 conn->state = OPEN; 2268 conn->con_handle = little_endian_read_16(packet, 3); 2269 2270 #ifdef ENABLE_SCO_OVER_HCI 2271 // update SCO 2272 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2273 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2274 } 2275 // trigger can send now 2276 if (hci_have_usb_transport()){ 2277 hci_stack->sco_can_send_now = 1; 2278 } 2279 #endif 2280 break; 2281 2282 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2283 handle = little_endian_read_16(packet, 3); 2284 conn = hci_connection_for_handle(handle); 2285 if (!conn) break; 2286 if (!packet[2]){ 2287 uint8_t * features = &packet[5]; 2288 // SSP Controller 2289 if (features[6] & (1 << 3)){ 2290 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2291 } 2292 // eSCO 2293 if (features[3] & (1<<7)){ 2294 conn->remote_supported_features[0] |= 1; 2295 } 2296 // Extended features 2297 if (features[7] & (1<<7)){ 2298 conn->remote_supported_features[0] |= 2; 2299 } 2300 } 2301 hci_handle_remote_features_received(conn); 2302 break; 2303 2304 case HCI_EVENT_LINK_KEY_REQUEST: 2305 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2306 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2307 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2308 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2309 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2310 hci_run(); 2311 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2312 return; 2313 2314 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2315 reverse_bd_addr(&packet[2], addr); 2316 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2317 if (!conn) break; 2318 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2319 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2320 // Change Connection Encryption keeps link key type 2321 if (link_key_type != CHANGED_COMBINATION_KEY){ 2322 conn->link_key_type = link_key_type; 2323 } 2324 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2325 // still forward event to allow dismiss of pairing dialog 2326 break; 2327 } 2328 2329 case HCI_EVENT_PIN_CODE_REQUEST: 2330 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2331 // non-bondable mode: pin code negative reply will be sent 2332 if (!hci_stack->bondable){ 2333 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2334 hci_run(); 2335 return; 2336 } 2337 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2338 if (!hci_stack->link_key_db) break; 2339 hci_event_pin_code_request_get_bd_addr(packet, addr); 2340 hci_stack->link_key_db->delete_link_key(addr); 2341 break; 2342 2343 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2344 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2345 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2346 break; 2347 2348 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2349 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2350 if (!hci_stack->ssp_auto_accept) break; 2351 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2352 break; 2353 2354 case HCI_EVENT_USER_PASSKEY_REQUEST: 2355 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2356 if (!hci_stack->ssp_auto_accept) break; 2357 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2358 break; 2359 case HCI_EVENT_MODE_CHANGE: 2360 handle = hci_event_mode_change_get_handle(packet); 2361 conn = hci_connection_for_handle(handle); 2362 if (!conn) break; 2363 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2364 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2365 break; 2366 #endif 2367 2368 case HCI_EVENT_ENCRYPTION_CHANGE: 2369 handle = hci_event_encryption_change_get_connection_handle(packet); 2370 conn = hci_connection_for_handle(handle); 2371 if (!conn) break; 2372 if (hci_event_encryption_change_get_status(packet) == 0) { 2373 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2374 if (encryption_enabled){ 2375 if (hci_is_le_connection(conn)){ 2376 // For LE, we accept connection as encrypted 2377 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2378 } 2379 #ifdef ENABLE_CLASSIC 2380 else { 2381 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2382 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2383 bool connected_uses_aes_ccm = encryption_enabled == 2; 2384 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2385 log_info("SC during pairing, but only E0 now -> abort"); 2386 conn->state = conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2387 break; 2388 } 2389 2390 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2391 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2392 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2393 } else { 2394 // if not, pretend everything is perfect 2395 conn->encryption_key_size = 16; 2396 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2397 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2398 } 2399 } 2400 #endif 2401 } else { 2402 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2403 } 2404 } 2405 2406 break; 2407 2408 #ifdef ENABLE_CLASSIC 2409 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2410 handle = little_endian_read_16(packet, 3); 2411 conn = hci_connection_for_handle(handle); 2412 if (!conn) break; 2413 2414 // dedicated bonding: send result and disconnect 2415 if (conn->bonding_flags & BONDING_DEDICATED){ 2416 conn->bonding_flags &= ~BONDING_DEDICATED; 2417 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2418 conn->bonding_status = packet[2]; 2419 break; 2420 } 2421 2422 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2423 // link key sufficient for requested security 2424 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2425 break; 2426 } 2427 // not enough 2428 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2429 break; 2430 #endif 2431 2432 // HCI_EVENT_DISCONNECTION_COMPLETE 2433 // has been split, to first notify stack before shutting connection down 2434 // see end of function, too. 2435 case HCI_EVENT_DISCONNECTION_COMPLETE: 2436 if (packet[2]) break; // status != 0 2437 handle = little_endian_read_16(packet, 3); 2438 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2439 if (hci_stack->acl_fragmentation_total_size > 0) { 2440 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2441 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2442 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2443 hci_stack->acl_fragmentation_total_size = 0; 2444 hci_stack->acl_fragmentation_pos = 0; 2445 if (release_buffer){ 2446 hci_release_packet_buffer(); 2447 } 2448 } 2449 } 2450 2451 conn = hci_connection_for_handle(handle); 2452 if (!conn) break; 2453 // mark connection for shutdown 2454 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2455 2456 // emit dedicatd bonding event 2457 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2458 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2459 } 2460 2461 #ifdef ENABLE_BLE 2462 #ifdef ENABLE_LE_PERIPHERAL 2463 // re-enable advertisements for le connections if active 2464 if (hci_is_le_connection(conn)){ 2465 hci_reenable_advertisements_if_needed(); 2466 } 2467 #endif 2468 #endif 2469 break; 2470 2471 case HCI_EVENT_HARDWARE_ERROR: 2472 log_error("Hardware Error: 0x%02x", packet[2]); 2473 if (hci_stack->hardware_error_callback){ 2474 (*hci_stack->hardware_error_callback)(packet[2]); 2475 } else { 2476 // if no special requests, just reboot stack 2477 hci_power_control_off(); 2478 hci_power_control_on(); 2479 } 2480 break; 2481 2482 #ifdef ENABLE_CLASSIC 2483 case HCI_EVENT_ROLE_CHANGE: 2484 if (packet[2]) break; // status != 0 2485 reverse_bd_addr(&packet[3], addr); 2486 addr_type = BD_ADDR_TYPE_ACL; 2487 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2488 if (!conn) break; 2489 conn->role = packet[9]; 2490 break; 2491 #endif 2492 2493 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2494 // release packet buffer only for asynchronous transport and if there are not further fragements 2495 if (hci_transport_synchronous()) { 2496 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2497 return; // instead of break: to avoid re-entering hci_run() 2498 } 2499 hci_stack->acl_fragmentation_tx_active = 0; 2500 if (hci_stack->acl_fragmentation_total_size) break; 2501 hci_release_packet_buffer(); 2502 2503 // L2CAP receives this event via the hci_emit_event below 2504 2505 #ifdef ENABLE_CLASSIC 2506 // For SCO, we do the can_send_now_check here 2507 hci_notify_if_sco_can_send_now(); 2508 #endif 2509 break; 2510 2511 #ifdef ENABLE_CLASSIC 2512 case HCI_EVENT_SCO_CAN_SEND_NOW: 2513 // For SCO, we do the can_send_now_check here 2514 hci_stack->sco_can_send_now = 1; 2515 hci_notify_if_sco_can_send_now(); 2516 return; 2517 2518 // explode inquriy results for easier consumption 2519 case HCI_EVENT_INQUIRY_RESULT: 2520 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2521 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2522 gap_inquiry_explode(packet, size); 2523 break; 2524 #endif 2525 2526 #ifdef ENABLE_BLE 2527 case HCI_EVENT_LE_META: 2528 switch (packet[2]){ 2529 #ifdef ENABLE_LE_CENTRAL 2530 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2531 // log_info("advertising report received"); 2532 if (!hci_stack->le_scanning_enabled) break; 2533 le_handle_advertisement_report(packet, size); 2534 break; 2535 #endif 2536 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2537 // Connection management 2538 reverse_bd_addr(&packet[8], addr); 2539 addr_type = (bd_addr_type_t)packet[7]; 2540 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2541 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2542 2543 #ifdef ENABLE_LE_CENTRAL 2544 // if auto-connect, remove from whitelist in both roles 2545 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2546 hci_remove_from_whitelist(addr_type, addr); 2547 } 2548 // handle error: error is reported only to the initiator -> outgoing connection 2549 if (packet[3]){ 2550 2551 // handle cancelled outgoing connection 2552 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2553 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2554 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2555 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2556 conn = gap_get_outgoing_connection(); 2557 } 2558 2559 // outgoing connection establishment is done 2560 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2561 // remove entry 2562 if (conn){ 2563 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2564 btstack_memory_hci_connection_free( conn ); 2565 } 2566 break; 2567 } 2568 #endif 2569 // on success, both hosts receive connection complete event 2570 if (packet[6] == HCI_ROLE_MASTER){ 2571 #ifdef ENABLE_LE_CENTRAL 2572 // if we're master, it was an outgoing connection and we're done with it 2573 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2574 #endif 2575 } else { 2576 #ifdef ENABLE_LE_PERIPHERAL 2577 // if we're slave, it was an incoming connection, advertisements have stopped 2578 hci_stack->le_advertisements_active = 0; 2579 #endif 2580 } 2581 // LE connections are auto-accepted, so just create a connection if there isn't one already 2582 if (!conn){ 2583 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2584 } 2585 // no memory, sorry. 2586 if (!conn){ 2587 break; 2588 } 2589 2590 conn->state = OPEN; 2591 conn->role = packet[6]; 2592 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2593 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2594 2595 #ifdef ENABLE_LE_PERIPHERAL 2596 if (packet[6] == HCI_ROLE_SLAVE){ 2597 hci_reenable_advertisements_if_needed(); 2598 } 2599 #endif 2600 2601 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2602 2603 // restart timer 2604 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2605 // btstack_run_loop_add_timer(&conn->timeout); 2606 2607 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2608 2609 hci_emit_nr_connections_changed(); 2610 break; 2611 2612 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2613 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2614 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2615 conn = hci_connection_for_handle(handle); 2616 if (!conn) break; 2617 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2618 break; 2619 2620 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2621 // connection 2622 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2623 conn = hci_connection_for_handle(handle); 2624 if (conn) { 2625 // read arguments 2626 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2627 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2628 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2629 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2630 2631 // validate against current connection parameter range 2632 le_connection_parameter_range_t existing_range; 2633 gap_get_connection_parameter_range(&existing_range); 2634 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2635 if (update_parameter){ 2636 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2637 conn->le_conn_interval_min = le_conn_interval_min; 2638 conn->le_conn_interval_max = le_conn_interval_max; 2639 conn->le_conn_latency = le_conn_latency; 2640 conn->le_supervision_timeout = le_supervision_timeout; 2641 } else { 2642 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2643 } 2644 } 2645 break; 2646 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2647 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2648 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2649 conn = hci_connection_for_handle(handle); 2650 if (conn) { 2651 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2652 } 2653 break; 2654 #endif 2655 default: 2656 break; 2657 } 2658 break; 2659 #endif 2660 case HCI_EVENT_VENDOR_SPECIFIC: 2661 // Vendor specific commands often create vendor specific event instead of num completed packets 2662 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2663 switch (hci_stack->manufacturer){ 2664 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2665 hci_stack->num_cmd_packets = 1; 2666 break; 2667 default: 2668 break; 2669 } 2670 break; 2671 default: 2672 break; 2673 } 2674 2675 handle_event_for_current_stack_state(packet, size); 2676 2677 // notify upper stack 2678 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2679 2680 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2681 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2682 if (!packet[2]){ 2683 handle = little_endian_read_16(packet, 3); 2684 hci_connection_t * aConn = hci_connection_for_handle(handle); 2685 if (aConn) { 2686 // discard connection if app did not trigger a reconnect in the event handler 2687 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2688 hci_shutdown_connection(aConn); 2689 } 2690 } 2691 } 2692 } 2693 2694 // execute main loop 2695 hci_run(); 2696 } 2697 2698 #ifdef ENABLE_CLASSIC 2699 2700 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2701 static void sco_schedule_tx(hci_connection_t * conn); 2702 2703 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2704 log_debug("SCO TX Timeout"); 2705 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2706 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2707 if (!conn) return; 2708 2709 // trigger send 2710 conn->sco_tx_ready = 1; 2711 // extra packet if CVSD but SCO buffer is too short 2712 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2713 conn->sco_tx_ready++; 2714 } 2715 hci_notify_if_sco_can_send_now(); 2716 } 2717 2718 2719 #define SCO_TX_AFTER_RX_MS (6) 2720 2721 static void sco_schedule_tx(hci_connection_t * conn){ 2722 2723 uint32_t now = btstack_run_loop_get_time_ms(); 2724 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2725 int time_delta_ms = sco_tx_ms - now; 2726 2727 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2728 2729 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2730 btstack_run_loop_set_timer(timer, time_delta_ms); 2731 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2732 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2733 btstack_run_loop_add_timer(timer); 2734 } 2735 2736 static void sco_handler(uint8_t * packet, uint16_t size){ 2737 // lookup connection struct 2738 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2739 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2740 if (!conn) return; 2741 2742 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2743 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2744 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2745 packet[2] = 0x3c; 2746 memmove(&packet[3], &packet[23], 63); 2747 size = 63; 2748 } 2749 } 2750 2751 if (hci_have_usb_transport()){ 2752 // Nothing to do 2753 } else { 2754 // 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); 2755 if (hci_stack->synchronous_flow_control_enabled == 0){ 2756 uint32_t now = btstack_run_loop_get_time_ms(); 2757 2758 if (!conn->sco_rx_valid){ 2759 // ignore first 10 packets 2760 conn->sco_rx_count++; 2761 // log_debug("sco rx count %u", conn->sco_rx_count); 2762 if (conn->sco_rx_count == 10) { 2763 // use first timestamp as is and pretent it just started 2764 conn->sco_rx_ms = now; 2765 conn->sco_rx_valid = 1; 2766 conn->sco_rx_count = 0; 2767 sco_schedule_tx(conn); 2768 } 2769 } else { 2770 // track expected arrival timme 2771 conn->sco_rx_count++; 2772 conn->sco_rx_ms += 7; 2773 int delta = (int32_t) (now - conn->sco_rx_ms); 2774 if (delta > 0){ 2775 conn->sco_rx_ms++; 2776 } 2777 // log_debug("sco rx %u", conn->sco_rx_ms); 2778 sco_schedule_tx(conn); 2779 } 2780 } 2781 } 2782 // deliver to app 2783 if (hci_stack->sco_packet_handler) { 2784 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2785 } 2786 2787 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2788 conn->num_packets_completed++; 2789 hci_stack->host_completed_packets = 1; 2790 hci_run(); 2791 #endif 2792 } 2793 #endif 2794 2795 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2796 hci_dump_packet(packet_type, 1, packet, size); 2797 switch (packet_type) { 2798 case HCI_EVENT_PACKET: 2799 event_handler(packet, size); 2800 break; 2801 case HCI_ACL_DATA_PACKET: 2802 acl_handler(packet, size); 2803 break; 2804 #ifdef ENABLE_CLASSIC 2805 case HCI_SCO_DATA_PACKET: 2806 sco_handler(packet, size); 2807 break; 2808 #endif 2809 default: 2810 break; 2811 } 2812 } 2813 2814 /** 2815 * @brief Add event packet handler. 2816 */ 2817 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2818 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2819 } 2820 2821 2822 /** Register HCI packet handlers */ 2823 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2824 hci_stack->acl_packet_handler = handler; 2825 } 2826 2827 #ifdef ENABLE_CLASSIC 2828 /** 2829 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2830 */ 2831 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2832 hci_stack->sco_packet_handler = handler; 2833 } 2834 #endif 2835 2836 static void hci_state_reset(void){ 2837 // no connections yet 2838 hci_stack->connections = NULL; 2839 2840 // keep discoverable/connectable as this has been requested by the client(s) 2841 // hci_stack->discoverable = 0; 2842 // hci_stack->connectable = 0; 2843 // hci_stack->bondable = 1; 2844 // hci_stack->own_addr_type = 0; 2845 2846 // buffer is free 2847 hci_stack->hci_packet_buffer_reserved = 0; 2848 2849 // no pending cmds 2850 hci_stack->decline_reason = 0; 2851 hci_stack->new_scan_enable_value = 0xff; 2852 2853 // LE 2854 #ifdef ENABLE_BLE 2855 memset(hci_stack->le_random_address, 0, 6); 2856 hci_stack->le_random_address_set = 0; 2857 #endif 2858 #ifdef ENABLE_LE_CENTRAL 2859 hci_stack->le_scanning_active = 0; 2860 hci_stack->le_scan_type = 0xff; 2861 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2862 hci_stack->le_whitelist = 0; 2863 hci_stack->le_whitelist_capacity = 0; 2864 #endif 2865 } 2866 2867 #ifdef ENABLE_CLASSIC 2868 /** 2869 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2870 */ 2871 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2872 // store and open remote device db 2873 hci_stack->link_key_db = link_key_db; 2874 if (hci_stack->link_key_db) { 2875 hci_stack->link_key_db->open(); 2876 } 2877 } 2878 #endif 2879 2880 void hci_init(const hci_transport_t *transport, const void *config){ 2881 2882 #ifdef HAVE_MALLOC 2883 if (!hci_stack) { 2884 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2885 } 2886 #else 2887 hci_stack = &hci_stack_static; 2888 #endif 2889 memset(hci_stack, 0, sizeof(hci_stack_t)); 2890 2891 // reference to use transport layer implementation 2892 hci_stack->hci_transport = transport; 2893 2894 // reference to used config 2895 hci_stack->config = config; 2896 2897 // setup pointer for outgoing packet buffer 2898 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2899 2900 // max acl payload size defined in config.h 2901 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2902 2903 // register packet handlers with transport 2904 transport->register_packet_handler(&packet_handler); 2905 2906 hci_stack->state = HCI_STATE_OFF; 2907 2908 // class of device 2909 hci_stack->class_of_device = 0x007a020c; // Smartphone 2910 2911 // bondable by default 2912 hci_stack->bondable = 1; 2913 2914 #ifdef ENABLE_CLASSIC 2915 // classic name 2916 hci_stack->local_name = default_classic_name; 2917 2918 // Master slave policy 2919 hci_stack->master_slave_policy = 1; 2920 2921 // Allow Role Switch 2922 hci_stack->allow_role_switch = 1; 2923 2924 // Default / minimum security level = 2 2925 hci_stack->gap_security_level = LEVEL_2; 2926 2927 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2928 hci_stack->gap_required_encyrption_key_size = 16; 2929 #endif 2930 2931 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2932 hci_stack->ssp_enable = 1; 2933 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2934 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2935 hci_stack->ssp_auto_accept = 1; 2936 2937 // Secure Connections: enable (requires support from Controller) 2938 hci_stack->secure_connections_enable = true; 2939 2940 // voice setting - signed 16 bit pcm data with CVSD over the air 2941 hci_stack->sco_voice_setting = 0x60; 2942 2943 #ifdef ENABLE_LE_CENTRAL 2944 // connection parameter to use for outgoing connections 2945 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2946 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2947 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2948 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2949 hci_stack->le_connection_latency = 4; // 4 2950 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2951 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2952 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2953 2954 // default LE Scanning 2955 hci_stack->le_scan_interval = 0x1e0; 2956 hci_stack->le_scan_window = 0x30; 2957 #endif 2958 2959 #ifdef ENABLE_LE_PERIPHERAL 2960 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2961 #endif 2962 2963 // connection parameter range used to answer connection parameter update requests in l2cap 2964 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2965 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2966 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2967 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2968 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2969 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2970 2971 hci_state_reset(); 2972 } 2973 2974 /** 2975 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2976 */ 2977 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2978 hci_stack->chipset = chipset_driver; 2979 2980 // reset chipset driver - init is also called on power_up 2981 if (hci_stack->chipset && hci_stack->chipset->init){ 2982 hci_stack->chipset->init(hci_stack->config); 2983 } 2984 } 2985 2986 /** 2987 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2988 */ 2989 void hci_set_control(const btstack_control_t *hardware_control){ 2990 // references to used control implementation 2991 hci_stack->control = hardware_control; 2992 // init with transport config 2993 hardware_control->init(hci_stack->config); 2994 } 2995 2996 void hci_close(void){ 2997 // close remote device db 2998 if (hci_stack->link_key_db) { 2999 hci_stack->link_key_db->close(); 3000 } 3001 3002 btstack_linked_list_iterator_t lit; 3003 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3004 while (btstack_linked_list_iterator_has_next(&lit)){ 3005 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3006 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3007 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3008 hci_shutdown_connection(connection); 3009 } 3010 3011 hci_power_control(HCI_POWER_OFF); 3012 3013 #ifdef HAVE_MALLOC 3014 free(hci_stack); 3015 #endif 3016 hci_stack = NULL; 3017 } 3018 3019 #ifdef ENABLE_CLASSIC 3020 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3021 // validate ranage and set 3022 if (encryption_key_size < 7) return; 3023 if (encryption_key_size > 16) return; 3024 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3025 } 3026 3027 void gap_set_security_level(gap_security_level_t security_level){ 3028 hci_stack->gap_security_level = security_level; 3029 } 3030 3031 gap_security_level_t gap_get_security_level(void){ 3032 return hci_stack->gap_security_level; 3033 } 3034 #endif 3035 3036 #ifdef ENABLE_CLASSIC 3037 void gap_set_class_of_device(uint32_t class_of_device){ 3038 hci_stack->class_of_device = class_of_device; 3039 } 3040 3041 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3042 hci_stack->default_link_policy_settings = default_link_policy_settings; 3043 } 3044 3045 void gap_set_allow_role_switch(bool allow_role_switch){ 3046 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3047 } 3048 3049 uint8_t hci_get_allow_role_switch(void){ 3050 return hci_stack->allow_role_switch; 3051 } 3052 3053 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3054 hci_stack->link_supervision_timeout = link_supervision_timeout; 3055 } 3056 3057 void hci_disable_l2cap_timeout_check(void){ 3058 disable_l2cap_timeouts = 1; 3059 } 3060 #endif 3061 3062 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3063 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3064 void hci_set_bd_addr(bd_addr_t addr){ 3065 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3066 hci_stack->custom_bd_addr_set = 1; 3067 } 3068 #endif 3069 3070 // State-Module-Driver overview 3071 // state module low-level 3072 // HCI_STATE_OFF off close 3073 // HCI_STATE_INITIALIZING, on open 3074 // HCI_STATE_WORKING, on open 3075 // HCI_STATE_HALTING, on open 3076 // HCI_STATE_SLEEPING, off/sleep close 3077 // HCI_STATE_FALLING_ASLEEP on open 3078 3079 static int hci_power_control_on(void){ 3080 3081 // power on 3082 int err = 0; 3083 if (hci_stack->control && hci_stack->control->on){ 3084 err = (*hci_stack->control->on)(); 3085 } 3086 if (err){ 3087 log_error( "POWER_ON failed"); 3088 hci_emit_hci_open_failed(); 3089 return err; 3090 } 3091 3092 // int chipset driver 3093 if (hci_stack->chipset && hci_stack->chipset->init){ 3094 hci_stack->chipset->init(hci_stack->config); 3095 } 3096 3097 // init transport 3098 if (hci_stack->hci_transport->init){ 3099 hci_stack->hci_transport->init(hci_stack->config); 3100 } 3101 3102 // open transport 3103 err = hci_stack->hci_transport->open(); 3104 if (err){ 3105 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3106 if (hci_stack->control && hci_stack->control->off){ 3107 (*hci_stack->control->off)(); 3108 } 3109 hci_emit_hci_open_failed(); 3110 return err; 3111 } 3112 return 0; 3113 } 3114 3115 static void hci_power_control_off(void){ 3116 3117 log_info("hci_power_control_off"); 3118 3119 // close low-level device 3120 hci_stack->hci_transport->close(); 3121 3122 log_info("hci_power_control_off - hci_transport closed"); 3123 3124 // power off 3125 if (hci_stack->control && hci_stack->control->off){ 3126 (*hci_stack->control->off)(); 3127 } 3128 3129 log_info("hci_power_control_off - control closed"); 3130 3131 hci_stack->state = HCI_STATE_OFF; 3132 } 3133 3134 static void hci_power_control_sleep(void){ 3135 3136 log_info("hci_power_control_sleep"); 3137 3138 #if 0 3139 // don't close serial port during sleep 3140 3141 // close low-level device 3142 hci_stack->hci_transport->close(hci_stack->config); 3143 #endif 3144 3145 // sleep mode 3146 if (hci_stack->control && hci_stack->control->sleep){ 3147 (*hci_stack->control->sleep)(); 3148 } 3149 3150 hci_stack->state = HCI_STATE_SLEEPING; 3151 } 3152 3153 static int hci_power_control_wake(void){ 3154 3155 log_info("hci_power_control_wake"); 3156 3157 // wake on 3158 if (hci_stack->control && hci_stack->control->wake){ 3159 (*hci_stack->control->wake)(); 3160 } 3161 3162 #if 0 3163 // open low-level device 3164 int err = hci_stack->hci_transport->open(hci_stack->config); 3165 if (err){ 3166 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3167 if (hci_stack->control && hci_stack->control->off){ 3168 (*hci_stack->control->off)(); 3169 } 3170 hci_emit_hci_open_failed(); 3171 return err; 3172 } 3173 #endif 3174 3175 return 0; 3176 } 3177 3178 static void hci_power_transition_to_initializing(void){ 3179 // set up state machine 3180 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3181 hci_stack->hci_packet_buffer_reserved = 0; 3182 hci_stack->state = HCI_STATE_INITIALIZING; 3183 hci_stack->substate = HCI_INIT_SEND_RESET; 3184 } 3185 3186 int hci_power_control(HCI_POWER_MODE power_mode){ 3187 3188 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3189 3190 int err = 0; 3191 switch (hci_stack->state){ 3192 3193 case HCI_STATE_OFF: 3194 switch (power_mode){ 3195 case HCI_POWER_ON: 3196 err = hci_power_control_on(); 3197 if (err) { 3198 log_error("hci_power_control_on() error %d", err); 3199 return err; 3200 } 3201 hci_power_transition_to_initializing(); 3202 break; 3203 case HCI_POWER_OFF: 3204 // do nothing 3205 break; 3206 case HCI_POWER_SLEEP: 3207 // do nothing (with SLEEP == OFF) 3208 break; 3209 } 3210 break; 3211 3212 case HCI_STATE_INITIALIZING: 3213 switch (power_mode){ 3214 case HCI_POWER_ON: 3215 // do nothing 3216 break; 3217 case HCI_POWER_OFF: 3218 // no connections yet, just turn it off 3219 hci_power_control_off(); 3220 break; 3221 case HCI_POWER_SLEEP: 3222 // no connections yet, just turn it off 3223 hci_power_control_sleep(); 3224 break; 3225 } 3226 break; 3227 3228 case HCI_STATE_WORKING: 3229 switch (power_mode){ 3230 case HCI_POWER_ON: 3231 // do nothing 3232 break; 3233 case HCI_POWER_OFF: 3234 // see hci_run 3235 hci_stack->state = HCI_STATE_HALTING; 3236 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3237 break; 3238 case HCI_POWER_SLEEP: 3239 // see hci_run 3240 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3241 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3242 break; 3243 } 3244 break; 3245 3246 case HCI_STATE_HALTING: 3247 switch (power_mode){ 3248 case HCI_POWER_ON: 3249 hci_power_transition_to_initializing(); 3250 break; 3251 case HCI_POWER_OFF: 3252 // do nothing 3253 break; 3254 case HCI_POWER_SLEEP: 3255 // see hci_run 3256 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3257 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3258 break; 3259 } 3260 break; 3261 3262 case HCI_STATE_FALLING_ASLEEP: 3263 switch (power_mode){ 3264 case HCI_POWER_ON: 3265 3266 #ifdef HAVE_PLATFORM_IPHONE_OS 3267 // nothing to do, if H4 supports power management 3268 if (btstack_control_iphone_power_management_enabled()){ 3269 hci_stack->state = HCI_STATE_INITIALIZING; 3270 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3271 break; 3272 } 3273 #endif 3274 hci_power_transition_to_initializing(); 3275 break; 3276 case HCI_POWER_OFF: 3277 // see hci_run 3278 hci_stack->state = HCI_STATE_HALTING; 3279 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3280 break; 3281 case HCI_POWER_SLEEP: 3282 // do nothing 3283 break; 3284 } 3285 break; 3286 3287 case HCI_STATE_SLEEPING: 3288 switch (power_mode){ 3289 case HCI_POWER_ON: 3290 3291 #ifdef HAVE_PLATFORM_IPHONE_OS 3292 // nothing to do, if H4 supports power management 3293 if (btstack_control_iphone_power_management_enabled()){ 3294 hci_stack->state = HCI_STATE_INITIALIZING; 3295 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3296 hci_update_scan_enable(); 3297 break; 3298 } 3299 #endif 3300 err = hci_power_control_wake(); 3301 if (err) return err; 3302 hci_power_transition_to_initializing(); 3303 break; 3304 case HCI_POWER_OFF: 3305 hci_stack->state = HCI_STATE_HALTING; 3306 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3307 break; 3308 case HCI_POWER_SLEEP: 3309 // do nothing 3310 break; 3311 } 3312 break; 3313 } 3314 3315 // create internal event 3316 hci_emit_state(); 3317 3318 // trigger next/first action 3319 hci_run(); 3320 3321 return 0; 3322 } 3323 3324 3325 #ifdef ENABLE_CLASSIC 3326 3327 static void hci_update_scan_enable(void){ 3328 // 2 = page scan, 1 = inq scan 3329 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3330 hci_run(); 3331 } 3332 3333 void gap_discoverable_control(uint8_t enable){ 3334 if (enable) enable = 1; // normalize argument 3335 3336 if (hci_stack->discoverable == enable){ 3337 hci_emit_discoverable_enabled(hci_stack->discoverable); 3338 return; 3339 } 3340 3341 hci_stack->discoverable = enable; 3342 hci_update_scan_enable(); 3343 } 3344 3345 void gap_connectable_control(uint8_t enable){ 3346 if (enable) enable = 1; // normalize argument 3347 3348 // don't emit event 3349 if (hci_stack->connectable == enable) return; 3350 3351 hci_stack->connectable = enable; 3352 hci_update_scan_enable(); 3353 } 3354 #endif 3355 3356 void gap_local_bd_addr(bd_addr_t address_buffer){ 3357 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3358 } 3359 3360 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3361 static void hci_host_num_completed_packets(void){ 3362 3363 // create packet manually as arrays are not supported and num_commands should not get reduced 3364 hci_reserve_packet_buffer(); 3365 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3366 3367 uint16_t size = 0; 3368 uint16_t num_handles = 0; 3369 packet[size++] = 0x35; 3370 packet[size++] = 0x0c; 3371 size++; // skip param len 3372 size++; // skip num handles 3373 3374 // add { handle, packets } entries 3375 btstack_linked_item_t * it; 3376 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3377 hci_connection_t * connection = (hci_connection_t *) it; 3378 if (connection->num_packets_completed){ 3379 little_endian_store_16(packet, size, connection->con_handle); 3380 size += 2; 3381 little_endian_store_16(packet, size, connection->num_packets_completed); 3382 size += 2; 3383 // 3384 num_handles++; 3385 connection->num_packets_completed = 0; 3386 } 3387 } 3388 3389 packet[2] = size - 3; 3390 packet[3] = num_handles; 3391 3392 hci_stack->host_completed_packets = 0; 3393 3394 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3395 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3396 3397 // release packet buffer for synchronous transport implementations 3398 if (hci_transport_synchronous()){ 3399 hci_release_packet_buffer(); 3400 hci_emit_transport_packet_sent(); 3401 } 3402 } 3403 #endif 3404 3405 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3406 UNUSED(ds); 3407 hci_stack->substate = HCI_HALTING_CLOSE; 3408 // allow packet handlers to defer final shutdown 3409 hci_emit_state(); 3410 hci_run(); 3411 } 3412 3413 static bool hci_run_acl_fragments(void){ 3414 if (hci_stack->acl_fragmentation_total_size > 0) { 3415 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3416 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3417 if (connection) { 3418 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3419 hci_send_acl_packet_fragments(connection); 3420 return true; 3421 } 3422 } else { 3423 // connection gone -> discard further fragments 3424 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3425 hci_stack->acl_fragmentation_total_size = 0; 3426 hci_stack->acl_fragmentation_pos = 0; 3427 } 3428 } 3429 return false; 3430 } 3431 3432 #ifdef ENABLE_CLASSIC 3433 static bool hci_run_general_gap_classic(void){ 3434 3435 // decline incoming connections 3436 if (hci_stack->decline_reason){ 3437 uint8_t reason = hci_stack->decline_reason; 3438 hci_stack->decline_reason = 0; 3439 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3440 return true; 3441 } 3442 // send scan enable 3443 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3444 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3445 hci_stack->new_scan_enable_value = 0xff; 3446 return true; 3447 } 3448 // start/stop inquiry 3449 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3450 uint8_t duration = hci_stack->inquiry_state; 3451 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3452 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3453 return true; 3454 } 3455 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3456 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3457 hci_send_cmd(&hci_inquiry_cancel); 3458 return true; 3459 } 3460 // remote name request 3461 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3462 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3463 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3464 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3465 return true; 3466 } 3467 // pairing 3468 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3469 uint8_t state = hci_stack->gap_pairing_state; 3470 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3471 switch (state){ 3472 case GAP_PAIRING_STATE_SEND_PIN: 3473 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_input.gap_pairing_pin), hci_stack->gap_pairing_input.gap_pairing_pin); 3474 break; 3475 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3476 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3477 break; 3478 case GAP_PAIRING_STATE_SEND_PASSKEY: 3479 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3480 break; 3481 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3482 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3483 break; 3484 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3485 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3486 break; 3487 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3488 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3489 break; 3490 default: 3491 break; 3492 } 3493 return true; 3494 } 3495 return false; 3496 } 3497 #endif 3498 3499 #ifdef ENABLE_BLE 3500 static bool hci_run_general_gap_le(void){ 3501 3502 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3503 3504 if (hci_stack->state != HCI_STATE_WORKING) return false; 3505 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3506 3507 #ifdef ENABLE_LE_CENTRAL 3508 // parameter change requires scanning to be stopped first 3509 if (hci_stack->le_scan_type != 0xff) { 3510 if (hci_stack->le_scanning_active){ 3511 hci_stack->le_scanning_active = 0; 3512 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3513 } else { 3514 int scan_type = (int) hci_stack->le_scan_type; 3515 hci_stack->le_scan_type = 0xff; 3516 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); 3517 } 3518 return true; 3519 } 3520 // finally, we can enable/disable le scan 3521 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3522 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3523 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3524 return true; 3525 } 3526 #endif 3527 #ifdef ENABLE_LE_PERIPHERAL 3528 // le advertisement control 3529 if (hci_stack->le_advertisements_todo){ 3530 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3531 } 3532 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3533 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3534 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3535 return true; 3536 } 3537 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3538 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3539 hci_send_cmd(&hci_le_set_advertising_parameters, 3540 hci_stack->le_advertisements_interval_min, 3541 hci_stack->le_advertisements_interval_max, 3542 hci_stack->le_advertisements_type, 3543 hci_stack->le_own_addr_type, 3544 hci_stack->le_advertisements_direct_address_type, 3545 hci_stack->le_advertisements_direct_address, 3546 hci_stack->le_advertisements_channel_map, 3547 hci_stack->le_advertisements_filter_policy); 3548 return true; 3549 } 3550 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3551 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3552 uint8_t adv_data_clean[31]; 3553 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3554 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3555 hci_stack->le_advertisements_data_len); 3556 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3557 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3558 return true; 3559 } 3560 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3561 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3562 uint8_t scan_data_clean[31]; 3563 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3564 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3565 hci_stack->le_scan_response_data_len); 3566 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3567 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3568 return true; 3569 } 3570 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3571 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3572 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3573 return true; 3574 } 3575 #endif 3576 3577 #ifdef ENABLE_LE_CENTRAL 3578 // 3579 // LE Whitelist Management 3580 // 3581 3582 // check if whitelist needs modification 3583 btstack_linked_list_iterator_t lit; 3584 int modification_pending = 0; 3585 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3586 while (btstack_linked_list_iterator_has_next(&lit)){ 3587 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3588 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3589 modification_pending = 1; 3590 break; 3591 } 3592 } 3593 3594 if (modification_pending){ 3595 // stop connnecting if modification pending 3596 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3597 hci_send_cmd(&hci_le_create_connection_cancel); 3598 return true; 3599 } 3600 3601 // add/remove entries 3602 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3603 while (btstack_linked_list_iterator_has_next(&lit)){ 3604 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3605 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3606 entry->state = LE_WHITELIST_ON_CONTROLLER; 3607 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3608 return true; 3609 } 3610 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3611 bd_addr_t address; 3612 bd_addr_type_t address_type = entry->address_type; 3613 (void)memcpy(address, entry->address, 6); 3614 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3615 btstack_memory_whitelist_entry_free(entry); 3616 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3617 return true; 3618 } 3619 } 3620 } 3621 3622 // start connecting 3623 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3624 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3625 bd_addr_t null_addr; 3626 memset(null_addr, 0, 6); 3627 hci_send_cmd(&hci_le_create_connection, 3628 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3629 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3630 1, // use whitelist 3631 0, // peer address type 3632 null_addr, // peer bd addr 3633 hci_stack->le_own_addr_type, // our addr type: 3634 hci_stack->le_connection_interval_min, // conn interval min 3635 hci_stack->le_connection_interval_max, // conn interval max 3636 hci_stack->le_connection_latency, // conn latency 3637 hci_stack->le_supervision_timeout, // conn latency 3638 hci_stack->le_minimum_ce_length, // min ce length 3639 hci_stack->le_maximum_ce_length // max ce length 3640 ); 3641 return true; 3642 } 3643 #endif 3644 return false; 3645 } 3646 #endif 3647 3648 static bool hci_run_general_pending_commmands(void){ 3649 btstack_linked_item_t * it; 3650 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3651 hci_connection_t * connection = (hci_connection_t *) it; 3652 3653 switch(connection->state){ 3654 case SEND_CREATE_CONNECTION: 3655 switch(connection->address_type){ 3656 #ifdef ENABLE_CLASSIC 3657 case BD_ADDR_TYPE_ACL: 3658 log_info("sending hci_create_connection"); 3659 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3660 break; 3661 #endif 3662 default: 3663 #ifdef ENABLE_BLE 3664 #ifdef ENABLE_LE_CENTRAL 3665 // track outgoing connection 3666 hci_stack->outgoing_addr_type = connection->address_type; 3667 (void)memcpy(hci_stack->outgoing_addr, 3668 connection->address, 6); 3669 log_info("sending hci_le_create_connection"); 3670 hci_send_cmd(&hci_le_create_connection, 3671 hci_stack->le_connection_scan_interval, // conn scan interval 3672 hci_stack->le_connection_scan_window, // conn scan windows 3673 0, // don't use whitelist 3674 connection->address_type, // peer address type 3675 connection->address, // peer bd addr 3676 hci_stack->le_own_addr_type, // our addr type: 3677 hci_stack->le_connection_interval_min, // conn interval min 3678 hci_stack->le_connection_interval_max, // conn interval max 3679 hci_stack->le_connection_latency, // conn latency 3680 hci_stack->le_supervision_timeout, // conn latency 3681 hci_stack->le_minimum_ce_length, // min ce length 3682 hci_stack->le_maximum_ce_length // max ce length 3683 ); 3684 connection->state = SENT_CREATE_CONNECTION; 3685 #endif 3686 #endif 3687 break; 3688 } 3689 return true; 3690 3691 #ifdef ENABLE_CLASSIC 3692 case RECEIVED_CONNECTION_REQUEST: 3693 connection->role = HCI_ROLE_SLAVE; 3694 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3695 log_info("sending hci_accept_connection_request"); 3696 connection->state = ACCEPTED_CONNECTION_REQUEST; 3697 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3698 } 3699 return true; 3700 #endif 3701 3702 #ifdef ENABLE_BLE 3703 #ifdef ENABLE_LE_CENTRAL 3704 case SEND_CANCEL_CONNECTION: 3705 connection->state = SENT_CANCEL_CONNECTION; 3706 hci_send_cmd(&hci_le_create_connection_cancel); 3707 return true; 3708 #endif 3709 #endif 3710 case SEND_DISCONNECT: 3711 connection->state = SENT_DISCONNECT; 3712 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3713 return true; 3714 3715 default: 3716 break; 3717 } 3718 3719 // no further commands if connection is about to get shut down 3720 if (connection->state == SENT_DISCONNECT) continue; 3721 3722 if (connection->authentication_flags & READ_RSSI){ 3723 connectionClearAuthenticationFlags(connection, READ_RSSI); 3724 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3725 return true; 3726 } 3727 3728 #ifdef ENABLE_CLASSIC 3729 3730 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3731 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3732 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3733 return true; 3734 } 3735 3736 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3737 log_info("responding to link key request"); 3738 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3739 link_key_t link_key; 3740 link_key_type_t link_key_type; 3741 if ( hci_stack->link_key_db 3742 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3743 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3744 connection->link_key_type = link_key_type; 3745 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3746 } else { 3747 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3748 } 3749 return true; 3750 } 3751 3752 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3753 log_info("denying to pin request"); 3754 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3755 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3756 return true; 3757 } 3758 3759 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3760 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3761 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3762 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3763 // tweak authentication requirements 3764 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3765 if (connection->bonding_flags & BONDING_DEDICATED){ 3766 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3767 } 3768 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3769 authreq |= 1; 3770 } 3771 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3772 } else { 3773 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3774 } 3775 return true; 3776 } 3777 3778 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3779 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3780 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3781 return true; 3782 } 3783 3784 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3785 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3786 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3787 return true; 3788 } 3789 3790 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3791 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3792 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3793 return true; 3794 } 3795 3796 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3797 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3798 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3799 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3800 return true; 3801 } 3802 3803 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3804 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3805 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3806 return true; 3807 } 3808 3809 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3810 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3811 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3812 return true; 3813 } 3814 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3815 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3816 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3817 return true; 3818 } 3819 #endif 3820 3821 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3822 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3823 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3824 return true; 3825 } 3826 3827 #ifdef ENABLE_CLASSIC 3828 uint16_t sniff_min_interval; 3829 switch (connection->sniff_min_interval){ 3830 case 0: 3831 break; 3832 case 0xffff: 3833 connection->sniff_min_interval = 0; 3834 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3835 return true; 3836 default: 3837 sniff_min_interval = connection->sniff_min_interval; 3838 connection->sniff_min_interval = 0; 3839 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3840 return true; 3841 } 3842 #endif 3843 3844 #ifdef ENABLE_BLE 3845 switch (connection->le_con_parameter_update_state){ 3846 // response to L2CAP CON PARAMETER UPDATE REQUEST 3847 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3848 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3849 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3850 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3851 0x0000, 0xffff); 3852 return true; 3853 case CON_PARAMETER_UPDATE_REPLY: 3854 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3855 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3856 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3857 0x0000, 0xffff); 3858 return true; 3859 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3860 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3861 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3862 return true; 3863 default: 3864 break; 3865 } 3866 if (connection->le_phy_update_all_phys != 0xff){ 3867 uint8_t all_phys = connection->le_phy_update_all_phys; 3868 connection->le_phy_update_all_phys = 0xff; 3869 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); 3870 return true; 3871 } 3872 #endif 3873 } 3874 return false; 3875 } 3876 3877 static void hci_run(void){ 3878 3879 bool done; 3880 3881 // send continuation fragments first, as they block the prepared packet buffer 3882 done = hci_run_acl_fragments(); 3883 if (done) return; 3884 3885 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3886 // send host num completed packets next as they don't require num_cmd_packets > 0 3887 if (!hci_can_send_comand_packet_transport()) return; 3888 if (hci_stack->host_completed_packets){ 3889 hci_host_num_completed_packets(); 3890 return; 3891 } 3892 #endif 3893 3894 if (!hci_can_send_command_packet_now()) return; 3895 3896 // global/non-connection oriented commands 3897 3898 3899 #ifdef ENABLE_CLASSIC 3900 // general gap classic 3901 done = hci_run_general_gap_classic(); 3902 if (done) return; 3903 #endif 3904 3905 #ifdef ENABLE_BLE 3906 // general gap le 3907 done = hci_run_general_gap_le(); 3908 if (done) return; 3909 #endif 3910 3911 // send pending HCI commands 3912 done = hci_run_general_pending_commmands(); 3913 if (done) return; 3914 3915 // stack state sub statemachines 3916 hci_connection_t * connection; 3917 switch (hci_stack->state){ 3918 case HCI_STATE_INITIALIZING: 3919 hci_initializing_run(); 3920 break; 3921 3922 case HCI_STATE_HALTING: 3923 3924 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3925 switch (hci_stack->substate){ 3926 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3927 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3928 3929 #ifdef ENABLE_BLE 3930 #ifdef ENABLE_LE_CENTRAL 3931 // free whitelist entries 3932 { 3933 btstack_linked_list_iterator_t lit; 3934 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3935 while (btstack_linked_list_iterator_has_next(&lit)){ 3936 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3937 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3938 btstack_memory_whitelist_entry_free(entry); 3939 } 3940 } 3941 #endif 3942 #endif 3943 // close all open connections 3944 connection = (hci_connection_t *) hci_stack->connections; 3945 if (connection){ 3946 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3947 if (!hci_can_send_command_packet_now()) return; 3948 3949 // check state 3950 if (connection->state == SENT_DISCONNECT) return; 3951 connection->state = SENT_DISCONNECT; 3952 3953 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3954 3955 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3956 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3957 3958 // ... which would be ignored anyway as we shutdown (free) the connection now 3959 hci_shutdown_connection(connection); 3960 3961 // finally, send the disconnect command 3962 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3963 return; 3964 } 3965 3966 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3967 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3968 log_info("HCI_STATE_HALTING: wait 50 ms"); 3969 hci_stack->substate = HCI_HALTING_W4_TIMER; 3970 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3971 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3972 btstack_run_loop_add_timer(&hci_stack->timeout); 3973 break; 3974 } 3975 3976 /* fall through */ 3977 3978 case HCI_HALTING_CLOSE: 3979 log_info("HCI_STATE_HALTING, calling off"); 3980 3981 // switch mode 3982 hci_power_control_off(); 3983 3984 log_info("HCI_STATE_HALTING, emitting state"); 3985 hci_emit_state(); 3986 log_info("HCI_STATE_HALTING, done"); 3987 break; 3988 3989 case HCI_HALTING_W4_TIMER: 3990 // keep waiting 3991 3992 break; 3993 default: 3994 break; 3995 } 3996 3997 break; 3998 3999 case HCI_STATE_FALLING_ASLEEP: 4000 switch(hci_stack->substate) { 4001 case HCI_FALLING_ASLEEP_DISCONNECT: 4002 log_info("HCI_STATE_FALLING_ASLEEP"); 4003 // close all open connections 4004 connection = (hci_connection_t *) hci_stack->connections; 4005 4006 #ifdef HAVE_PLATFORM_IPHONE_OS 4007 // don't close connections, if H4 supports power management 4008 if (btstack_control_iphone_power_management_enabled()){ 4009 connection = NULL; 4010 } 4011 #endif 4012 if (connection){ 4013 4014 // send disconnect 4015 if (!hci_can_send_command_packet_now()) return; 4016 4017 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4018 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 4019 4020 // send disconnected event right away - causes higher layer connections to get closed, too. 4021 hci_shutdown_connection(connection); 4022 return; 4023 } 4024 4025 if (hci_classic_supported()){ 4026 // disable page and inquiry scan 4027 if (!hci_can_send_command_packet_now()) return; 4028 4029 log_info("HCI_STATE_HALTING, disabling inq scans"); 4030 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4031 4032 // continue in next sub state 4033 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4034 break; 4035 } 4036 4037 /* fall through */ 4038 4039 case HCI_FALLING_ASLEEP_COMPLETE: 4040 log_info("HCI_STATE_HALTING, calling sleep"); 4041 #ifdef HAVE_PLATFORM_IPHONE_OS 4042 // don't actually go to sleep, if H4 supports power management 4043 if (btstack_control_iphone_power_management_enabled()){ 4044 // SLEEP MODE reached 4045 hci_stack->state = HCI_STATE_SLEEPING; 4046 hci_emit_state(); 4047 break; 4048 } 4049 #endif 4050 // switch mode 4051 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4052 hci_emit_state(); 4053 break; 4054 4055 default: 4056 break; 4057 } 4058 break; 4059 4060 default: 4061 break; 4062 } 4063 } 4064 4065 int hci_send_cmd_packet(uint8_t *packet, int size){ 4066 // house-keeping 4067 4068 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4069 hci_stack->loopback_mode = packet[3]; 4070 } 4071 4072 #ifdef ENABLE_CLASSIC 4073 bd_addr_t addr; 4074 hci_connection_t * conn; 4075 4076 // create_connection? 4077 if (IS_COMMAND(packet, hci_create_connection)){ 4078 reverse_bd_addr(&packet[3], addr); 4079 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4080 4081 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4082 if (!conn){ 4083 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4084 if (!conn){ 4085 // notify client that alloc failed 4086 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4087 return -1; // packet not sent to controller 4088 } 4089 conn->state = SEND_CREATE_CONNECTION; 4090 } 4091 log_info("conn state %u", conn->state); 4092 switch (conn->state){ 4093 // if connection active exists 4094 case OPEN: 4095 // and OPEN, emit connection complete command 4096 hci_emit_connection_complete(addr, conn->con_handle, 0); 4097 return -1; // packet not sent to controller 4098 case RECEIVED_DISCONNECTION_COMPLETE: 4099 // create connection triggered in disconnect complete event, let's do it now 4100 break; 4101 case SEND_CREATE_CONNECTION: 4102 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4103 break; 4104 default: 4105 // otherwise, just ignore as it is already in the open process 4106 return -1; // packet not sent to controller 4107 } 4108 conn->state = SENT_CREATE_CONNECTION; 4109 4110 // track outgoing connection 4111 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4112 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4113 } 4114 4115 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4116 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4117 } 4118 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4119 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4120 } 4121 4122 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4123 if (hci_stack->link_key_db){ 4124 reverse_bd_addr(&packet[3], addr); 4125 hci_stack->link_key_db->delete_link_key(addr); 4126 } 4127 } 4128 4129 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4130 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4131 reverse_bd_addr(&packet[3], addr); 4132 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4133 if (conn){ 4134 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4135 } 4136 } 4137 4138 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4139 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4140 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4141 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4142 reverse_bd_addr(&packet[3], addr); 4143 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4144 if (conn){ 4145 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4146 } 4147 } 4148 4149 #ifdef ENABLE_SCO_OVER_HCI 4150 // setup_synchronous_connection? Voice setting at offset 22 4151 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4152 // TODO: compare to current setting if sco connection already active 4153 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4154 } 4155 // accept_synchronus_connection? Voice setting at offset 18 4156 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4157 // TODO: compare to current setting if sco connection already active 4158 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4159 } 4160 #endif 4161 #endif 4162 4163 #ifdef ENABLE_BLE 4164 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4165 hci_stack->le_random_address_set = 1; 4166 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4167 } 4168 #ifdef ENABLE_LE_PERIPHERAL 4169 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4170 hci_stack->le_advertisements_active = packet[3]; 4171 } 4172 #endif 4173 #ifdef ENABLE_LE_CENTRAL 4174 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4175 // white list used? 4176 uint8_t initiator_filter_policy = packet[7]; 4177 switch (initiator_filter_policy){ 4178 case 0: 4179 // whitelist not used 4180 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4181 break; 4182 case 1: 4183 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4184 break; 4185 default: 4186 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4187 break; 4188 } 4189 } 4190 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4191 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4192 } 4193 #endif 4194 #endif 4195 4196 hci_stack->num_cmd_packets--; 4197 4198 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4199 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4200 } 4201 4202 // disconnect because of security block 4203 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4204 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4205 if (!connection) return; 4206 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4207 } 4208 4209 4210 // Configure Secure Simple Pairing 4211 4212 #ifdef ENABLE_CLASSIC 4213 4214 // enable will enable SSP during init 4215 void gap_ssp_set_enable(int enable){ 4216 hci_stack->ssp_enable = enable; 4217 } 4218 4219 static int hci_local_ssp_activated(void){ 4220 return gap_ssp_supported() && hci_stack->ssp_enable; 4221 } 4222 4223 // if set, BTstack will respond to io capability request using authentication requirement 4224 void gap_ssp_set_io_capability(int io_capability){ 4225 hci_stack->ssp_io_capability = io_capability; 4226 } 4227 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4228 hci_stack->ssp_authentication_requirement = authentication_requirement; 4229 } 4230 4231 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4232 void gap_ssp_set_auto_accept(int auto_accept){ 4233 hci_stack->ssp_auto_accept = auto_accept; 4234 } 4235 4236 void gap_secure_connections_enable(bool enable){ 4237 hci_stack->secure_connections_enable = enable; 4238 } 4239 4240 #endif 4241 4242 // va_list part of hci_send_cmd 4243 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4244 if (!hci_can_send_command_packet_now()){ 4245 log_error("hci_send_cmd called but cannot send packet now"); 4246 return 0; 4247 } 4248 4249 // for HCI INITIALIZATION 4250 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4251 hci_stack->last_cmd_opcode = cmd->opcode; 4252 4253 hci_reserve_packet_buffer(); 4254 uint8_t * packet = hci_stack->hci_packet_buffer; 4255 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4256 int err = hci_send_cmd_packet(packet, size); 4257 4258 // release packet buffer on error or for synchronous transport implementations 4259 if ((err < 0) || hci_transport_synchronous()){ 4260 hci_release_packet_buffer(); 4261 hci_emit_transport_packet_sent(); 4262 } 4263 4264 return err; 4265 } 4266 4267 /** 4268 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4269 */ 4270 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4271 va_list argptr; 4272 va_start(argptr, cmd); 4273 int res = hci_send_cmd_va_arg(cmd, argptr); 4274 va_end(argptr); 4275 return res; 4276 } 4277 4278 // Create various non-HCI events. 4279 // TODO: generalize, use table similar to hci_create_command 4280 4281 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4282 // dump packet 4283 if (dump) { 4284 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4285 } 4286 4287 // dispatch to all event handlers 4288 btstack_linked_list_iterator_t it; 4289 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4290 while (btstack_linked_list_iterator_has_next(&it)){ 4291 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4292 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4293 } 4294 } 4295 4296 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4297 if (!hci_stack->acl_packet_handler) return; 4298 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4299 } 4300 4301 #ifdef ENABLE_CLASSIC 4302 static void hci_notify_if_sco_can_send_now(void){ 4303 // notify SCO sender if waiting 4304 if (!hci_stack->sco_waiting_for_can_send_now) return; 4305 if (hci_can_send_sco_packet_now()){ 4306 hci_stack->sco_waiting_for_can_send_now = 0; 4307 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4308 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4309 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4310 } 4311 } 4312 4313 // parsing end emitting has been merged to reduce code size 4314 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4315 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4316 4317 uint8_t * eir_data; 4318 ad_context_t context; 4319 const uint8_t * name; 4320 uint8_t name_len; 4321 4322 if (size < 3) return; 4323 4324 int event_type = hci_event_packet_get_type(packet); 4325 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4326 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4327 4328 switch (event_type){ 4329 case HCI_EVENT_INQUIRY_RESULT: 4330 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4331 if (size != (3 + (num_responses * 14))) return; 4332 break; 4333 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4334 if (size != 257) return; 4335 if (num_responses != 1) return; 4336 break; 4337 default: 4338 return; 4339 } 4340 4341 // event[1] is set at the end 4342 int i; 4343 for (i=0; i<num_responses;i++){ 4344 memset(event, 0, sizeof(event)); 4345 event[0] = GAP_EVENT_INQUIRY_RESULT; 4346 uint8_t event_size = 18; // if name is not set by EIR 4347 4348 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4349 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4350 (void)memcpy(&event[9], 4351 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4352 3); // class of device 4353 (void)memcpy(&event[12], 4354 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4355 2); // clock offset 4356 4357 switch (event_type){ 4358 case HCI_EVENT_INQUIRY_RESULT: 4359 // 14,15,16,17 = 0, size 18 4360 break; 4361 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4362 event[14] = 1; 4363 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4364 // 16,17 = 0, size 18 4365 break; 4366 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4367 event[14] = 1; 4368 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4369 // EIR packets only contain a single inquiry response 4370 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4371 name = NULL; 4372 // Iterate over EIR data 4373 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4374 uint8_t data_type = ad_iterator_get_data_type(&context); 4375 uint8_t data_size = ad_iterator_get_data_len(&context); 4376 const uint8_t * data = ad_iterator_get_data(&context); 4377 // Prefer Complete Local Name over Shortend Local Name 4378 switch (data_type){ 4379 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4380 if (name) continue; 4381 /* fall through */ 4382 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4383 name = data; 4384 name_len = data_size; 4385 break; 4386 default: 4387 break; 4388 } 4389 } 4390 if (name){ 4391 event[16] = 1; 4392 // truncate name if needed 4393 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4394 event[17] = len; 4395 (void)memcpy(&event[18], name, len); 4396 event_size += len; 4397 } 4398 break; 4399 } 4400 event[1] = event_size - 2; 4401 hci_emit_event(event, event_size, 1); 4402 } 4403 } 4404 #endif 4405 4406 void hci_emit_state(void){ 4407 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4408 uint8_t event[3]; 4409 event[0] = BTSTACK_EVENT_STATE; 4410 event[1] = sizeof(event) - 2; 4411 event[2] = hci_stack->state; 4412 hci_emit_event(event, sizeof(event), 1); 4413 } 4414 4415 #ifdef ENABLE_CLASSIC 4416 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4417 uint8_t event[13]; 4418 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4419 event[1] = sizeof(event) - 2; 4420 event[2] = status; 4421 little_endian_store_16(event, 3, con_handle); 4422 reverse_bd_addr(address, &event[5]); 4423 event[11] = 1; // ACL connection 4424 event[12] = 0; // encryption disabled 4425 hci_emit_event(event, sizeof(event), 1); 4426 } 4427 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4428 if (disable_l2cap_timeouts) return; 4429 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4430 uint8_t event[4]; 4431 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4432 event[1] = sizeof(event) - 2; 4433 little_endian_store_16(event, 2, conn->con_handle); 4434 hci_emit_event(event, sizeof(event), 1); 4435 } 4436 #endif 4437 4438 #ifdef ENABLE_BLE 4439 #ifdef ENABLE_LE_CENTRAL 4440 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4441 uint8_t event[21]; 4442 event[0] = HCI_EVENT_LE_META; 4443 event[1] = sizeof(event) - 2; 4444 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4445 event[3] = status; 4446 little_endian_store_16(event, 4, con_handle); 4447 event[6] = 0; // TODO: role 4448 event[7] = address_type; 4449 reverse_bd_addr(address, &event[8]); 4450 little_endian_store_16(event, 14, 0); // interval 4451 little_endian_store_16(event, 16, 0); // latency 4452 little_endian_store_16(event, 18, 0); // supervision timeout 4453 event[20] = 0; // master clock accuracy 4454 hci_emit_event(event, sizeof(event), 1); 4455 } 4456 #endif 4457 #endif 4458 4459 static void hci_emit_transport_packet_sent(void){ 4460 // notify upper stack that it might be possible to send again 4461 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4462 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4463 } 4464 4465 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4466 uint8_t event[6]; 4467 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4468 event[1] = sizeof(event) - 2; 4469 event[2] = 0; // status = OK 4470 little_endian_store_16(event, 3, con_handle); 4471 event[5] = reason; 4472 hci_emit_event(event, sizeof(event), 1); 4473 } 4474 4475 static void hci_emit_nr_connections_changed(void){ 4476 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4477 uint8_t event[3]; 4478 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4479 event[1] = sizeof(event) - 2; 4480 event[2] = nr_hci_connections(); 4481 hci_emit_event(event, sizeof(event), 1); 4482 } 4483 4484 static void hci_emit_hci_open_failed(void){ 4485 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4486 uint8_t event[2]; 4487 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4488 event[1] = sizeof(event) - 2; 4489 hci_emit_event(event, sizeof(event), 1); 4490 } 4491 4492 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4493 log_info("hci_emit_dedicated_bonding_result %u ", status); 4494 uint8_t event[9]; 4495 int pos = 0; 4496 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4497 event[pos++] = sizeof(event) - 2; 4498 event[pos++] = status; 4499 reverse_bd_addr(address, &event[pos]); 4500 hci_emit_event(event, sizeof(event), 1); 4501 } 4502 4503 4504 #ifdef ENABLE_CLASSIC 4505 4506 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4507 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4508 uint8_t event[5]; 4509 int pos = 0; 4510 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4511 event[pos++] = sizeof(event) - 2; 4512 little_endian_store_16(event, 2, con_handle); 4513 pos += 2; 4514 event[pos++] = level; 4515 hci_emit_event(event, sizeof(event), 1); 4516 } 4517 4518 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4519 if (!connection) return LEVEL_0; 4520 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4521 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4522 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4523 // LEVEL 4 always requires 128 bit encrytion key size 4524 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4525 security_level = LEVEL_3; 4526 } 4527 return security_level; 4528 } 4529 4530 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4531 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4532 uint8_t event[3]; 4533 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4534 event[1] = sizeof(event) - 2; 4535 event[2] = enabled; 4536 hci_emit_event(event, sizeof(event), 1); 4537 } 4538 4539 // query if remote side supports eSCO 4540 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4541 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4542 if (!connection) return 0; 4543 return (connection->remote_supported_features[0] & 1) != 0; 4544 } 4545 4546 // query if remote side supports SSP 4547 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4548 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4549 if (!connection) return 0; 4550 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER) ? 1 : 0; 4551 } 4552 4553 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4554 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4555 } 4556 4557 // GAP API 4558 /** 4559 * @bbrief enable/disable bonding. default is enabled 4560 * @praram enabled 4561 */ 4562 void gap_set_bondable_mode(int enable){ 4563 hci_stack->bondable = enable ? 1 : 0; 4564 } 4565 /** 4566 * @brief Get bondable mode. 4567 * @return 1 if bondable 4568 */ 4569 int gap_get_bondable_mode(void){ 4570 return hci_stack->bondable; 4571 } 4572 4573 /** 4574 * @brief map link keys to security levels 4575 */ 4576 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4577 switch (link_key_type){ 4578 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4579 return LEVEL_4; 4580 case COMBINATION_KEY: 4581 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4582 return LEVEL_3; 4583 default: 4584 return LEVEL_2; 4585 } 4586 } 4587 4588 /** 4589 * @brief map link keys to secure connection yes/no 4590 */ 4591 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4592 switch (link_key_type){ 4593 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4594 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4595 return 1; 4596 default: 4597 return 0; 4598 } 4599 } 4600 4601 /** 4602 * @brief map link keys to authenticated 4603 */ 4604 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4605 switch (link_key_type){ 4606 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4607 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4608 return 1; 4609 default: 4610 return 0; 4611 } 4612 } 4613 4614 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4615 log_info("gap_mitm_protection_required_for_security_level %u", level); 4616 return level > LEVEL_2; 4617 } 4618 4619 /** 4620 * @brief get current security level 4621 */ 4622 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4623 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4624 if (!connection) return LEVEL_0; 4625 return gap_security_level_for_connection(connection); 4626 } 4627 4628 /** 4629 * @brief request connection to device to 4630 * @result GAP_AUTHENTICATION_RESULT 4631 */ 4632 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4633 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4634 if (!connection){ 4635 hci_emit_security_level(con_handle, LEVEL_0); 4636 return; 4637 } 4638 gap_security_level_t current_level = gap_security_level(con_handle); 4639 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4640 requested_level, connection->requested_security_level, current_level); 4641 4642 // assumption: earlier requested security higher than current level => security request is active 4643 if (current_level < connection->requested_security_level){ 4644 if (connection->requested_security_level < requested_level){ 4645 // increase requested level as new level is higher 4646 4647 // TODO: handle re-authentication when done 4648 4649 connection->requested_security_level = requested_level; 4650 } 4651 return; 4652 } 4653 4654 // no request active, notify if security sufficient 4655 if (requested_level <= current_level){ 4656 hci_emit_security_level(con_handle, current_level); 4657 return; 4658 } 4659 4660 // start pairing to increase security level 4661 connection->requested_security_level = requested_level; 4662 4663 #if 0 4664 // sending encryption request without a link key results in an error. 4665 // TODO: figure out how to use it properly 4666 4667 // would enabling ecnryption suffice (>= LEVEL_2)? 4668 if (hci_stack->link_key_db){ 4669 link_key_type_t link_key_type; 4670 link_key_t link_key; 4671 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4672 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4673 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4674 return; 4675 } 4676 } 4677 } 4678 #endif 4679 4680 // start to authenticate connection 4681 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4682 hci_run(); 4683 } 4684 4685 /** 4686 * @brief start dedicated bonding with device. disconnect after bonding 4687 * @param device 4688 * @param request MITM protection 4689 * @result GAP_DEDICATED_BONDING_COMPLETE 4690 */ 4691 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4692 4693 // create connection state machine 4694 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4695 4696 if (!connection){ 4697 return BTSTACK_MEMORY_ALLOC_FAILED; 4698 } 4699 4700 // delete linkn key 4701 gap_drop_link_key_for_bd_addr(device); 4702 4703 // configure LEVEL_2/3, dedicated bonding 4704 connection->state = SEND_CREATE_CONNECTION; 4705 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4706 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4707 connection->bonding_flags = BONDING_DEDICATED; 4708 4709 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4710 4711 // handle: connnection failure (connection complete != ok) 4712 // handle: authentication failure 4713 // handle: disconnect on done 4714 4715 hci_run(); 4716 4717 return 0; 4718 } 4719 #endif 4720 4721 void gap_set_local_name(const char * local_name){ 4722 hci_stack->local_name = local_name; 4723 } 4724 4725 4726 #ifdef ENABLE_BLE 4727 4728 #ifdef ENABLE_LE_CENTRAL 4729 void gap_start_scan(void){ 4730 hci_stack->le_scanning_enabled = 1; 4731 hci_run(); 4732 } 4733 4734 void gap_stop_scan(void){ 4735 hci_stack->le_scanning_enabled = 0; 4736 hci_run(); 4737 } 4738 4739 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4740 hci_stack->le_scan_type = scan_type; 4741 hci_stack->le_scan_interval = scan_interval; 4742 hci_stack->le_scan_window = scan_window; 4743 hci_run(); 4744 } 4745 4746 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4747 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4748 if (!conn){ 4749 log_info("gap_connect: no connection exists yet, creating context"); 4750 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4751 if (!conn){ 4752 // notify client that alloc failed 4753 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4754 log_info("gap_connect: failed to alloc hci_connection_t"); 4755 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4756 } 4757 conn->state = SEND_CREATE_CONNECTION; 4758 log_info("gap_connect: send create connection next"); 4759 hci_run(); 4760 return ERROR_CODE_SUCCESS; 4761 } 4762 4763 if (!hci_is_le_connection(conn) || 4764 (conn->state == SEND_CREATE_CONNECTION) || 4765 (conn->state == SENT_CREATE_CONNECTION)) { 4766 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4767 log_error("gap_connect: classic connection or connect is already being created"); 4768 return GATT_CLIENT_IN_WRONG_STATE; 4769 } 4770 4771 // check if connection was just disconnected 4772 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4773 log_info("gap_connect: send create connection (again)"); 4774 conn->state = SEND_CREATE_CONNECTION; 4775 hci_run(); 4776 return ERROR_CODE_SUCCESS; 4777 } 4778 4779 log_info("gap_connect: context exists with state %u", conn->state); 4780 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4781 hci_run(); 4782 return ERROR_CODE_SUCCESS; 4783 } 4784 4785 // @assumption: only a single outgoing LE Connection exists 4786 static hci_connection_t * gap_get_outgoing_connection(void){ 4787 btstack_linked_item_t *it; 4788 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4789 hci_connection_t * conn = (hci_connection_t *) it; 4790 if (!hci_is_le_connection(conn)) continue; 4791 switch (conn->state){ 4792 case SEND_CREATE_CONNECTION: 4793 case SENT_CREATE_CONNECTION: 4794 case SENT_CANCEL_CONNECTION: 4795 return conn; 4796 default: 4797 break; 4798 }; 4799 } 4800 return NULL; 4801 } 4802 4803 uint8_t gap_connect_cancel(void){ 4804 hci_connection_t * conn = gap_get_outgoing_connection(); 4805 if (!conn) return 0; 4806 switch (conn->state){ 4807 case SEND_CREATE_CONNECTION: 4808 // skip sending create connection and emit event instead 4809 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4810 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4811 btstack_memory_hci_connection_free( conn ); 4812 break; 4813 case SENT_CREATE_CONNECTION: 4814 // request to send cancel connection 4815 conn->state = SEND_CANCEL_CONNECTION; 4816 hci_run(); 4817 break; 4818 default: 4819 break; 4820 } 4821 return 0; 4822 } 4823 #endif 4824 4825 #ifdef ENABLE_LE_CENTRAL 4826 /** 4827 * @brief Set connection parameters for outgoing connections 4828 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4829 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4830 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4831 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4832 * @param conn_latency, default: 4 4833 * @param supervision_timeout (unit: 10ms), default: 720 ms 4834 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4835 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4836 */ 4837 4838 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4839 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4840 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4841 hci_stack->le_connection_scan_interval = conn_scan_interval; 4842 hci_stack->le_connection_scan_window = conn_scan_window; 4843 hci_stack->le_connection_interval_min = conn_interval_min; 4844 hci_stack->le_connection_interval_max = conn_interval_max; 4845 hci_stack->le_connection_latency = conn_latency; 4846 hci_stack->le_supervision_timeout = supervision_timeout; 4847 hci_stack->le_minimum_ce_length = min_ce_length; 4848 hci_stack->le_maximum_ce_length = max_ce_length; 4849 } 4850 #endif 4851 4852 /** 4853 * @brief Updates the connection parameters for a given LE connection 4854 * @param handle 4855 * @param conn_interval_min (unit: 1.25ms) 4856 * @param conn_interval_max (unit: 1.25ms) 4857 * @param conn_latency 4858 * @param supervision_timeout (unit: 10ms) 4859 * @returns 0 if ok 4860 */ 4861 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4862 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4863 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4864 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4865 connection->le_conn_interval_min = conn_interval_min; 4866 connection->le_conn_interval_max = conn_interval_max; 4867 connection->le_conn_latency = conn_latency; 4868 connection->le_supervision_timeout = supervision_timeout; 4869 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4870 hci_run(); 4871 return 0; 4872 } 4873 4874 /** 4875 * @brief Request an update of the connection parameter for a given LE connection 4876 * @param handle 4877 * @param conn_interval_min (unit: 1.25ms) 4878 * @param conn_interval_max (unit: 1.25ms) 4879 * @param conn_latency 4880 * @param supervision_timeout (unit: 10ms) 4881 * @returns 0 if ok 4882 */ 4883 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4884 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4885 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4886 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4887 connection->le_conn_interval_min = conn_interval_min; 4888 connection->le_conn_interval_max = conn_interval_max; 4889 connection->le_conn_latency = conn_latency; 4890 connection->le_supervision_timeout = supervision_timeout; 4891 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4892 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4893 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4894 return 0; 4895 } 4896 4897 #ifdef ENABLE_LE_PERIPHERAL 4898 4899 static void gap_advertisments_changed(void){ 4900 // disable advertisements before updating adv, scan data, or adv params 4901 if (hci_stack->le_advertisements_active){ 4902 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4903 } 4904 hci_run(); 4905 } 4906 4907 /** 4908 * @brief Set Advertisement Data 4909 * @param advertising_data_length 4910 * @param advertising_data (max 31 octets) 4911 * @note data is not copied, pointer has to stay valid 4912 */ 4913 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4914 hci_stack->le_advertisements_data_len = advertising_data_length; 4915 hci_stack->le_advertisements_data = advertising_data; 4916 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4917 gap_advertisments_changed(); 4918 } 4919 4920 /** 4921 * @brief Set Scan Response Data 4922 * @param advertising_data_length 4923 * @param advertising_data (max 31 octets) 4924 * @note data is not copied, pointer has to stay valid 4925 */ 4926 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4927 hci_stack->le_scan_response_data_len = scan_response_data_length; 4928 hci_stack->le_scan_response_data = scan_response_data; 4929 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4930 gap_advertisments_changed(); 4931 } 4932 4933 /** 4934 * @brief Set Advertisement Parameters 4935 * @param adv_int_min 4936 * @param adv_int_max 4937 * @param adv_type 4938 * @param direct_address_type 4939 * @param direct_address 4940 * @param channel_map 4941 * @param filter_policy 4942 * 4943 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4944 */ 4945 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4946 uint8_t direct_address_typ, bd_addr_t direct_address, 4947 uint8_t channel_map, uint8_t filter_policy) { 4948 4949 hci_stack->le_advertisements_interval_min = adv_int_min; 4950 hci_stack->le_advertisements_interval_max = adv_int_max; 4951 hci_stack->le_advertisements_type = adv_type; 4952 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4953 hci_stack->le_advertisements_channel_map = channel_map; 4954 hci_stack->le_advertisements_filter_policy = filter_policy; 4955 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4956 6); 4957 4958 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4959 gap_advertisments_changed(); 4960 } 4961 4962 /** 4963 * @brief Enable/Disable Advertisements 4964 * @param enabled 4965 */ 4966 void gap_advertisements_enable(int enabled){ 4967 hci_stack->le_advertisements_enabled = enabled; 4968 if (enabled && !hci_stack->le_advertisements_active){ 4969 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4970 } 4971 if (!enabled && hci_stack->le_advertisements_active){ 4972 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4973 } 4974 hci_run(); 4975 } 4976 4977 #endif 4978 4979 void hci_le_set_own_address_type(uint8_t own_address_type){ 4980 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4981 if (own_address_type == hci_stack->le_own_addr_type) return; 4982 hci_stack->le_own_addr_type = own_address_type; 4983 4984 #ifdef ENABLE_LE_PERIPHERAL 4985 // update advertisement parameters, too 4986 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4987 gap_advertisments_changed(); 4988 #endif 4989 #ifdef ENABLE_LE_CENTRAL 4990 // note: we don't update scan parameters or modify ongoing connection attempts 4991 #endif 4992 } 4993 4994 #endif 4995 4996 uint8_t gap_disconnect(hci_con_handle_t handle){ 4997 hci_connection_t * conn = hci_connection_for_handle(handle); 4998 if (!conn){ 4999 hci_emit_disconnection_complete(handle, 0); 5000 return 0; 5001 } 5002 // ignore if already disconnected 5003 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5004 return 0; 5005 } 5006 conn->state = SEND_DISCONNECT; 5007 hci_run(); 5008 return 0; 5009 } 5010 5011 int gap_read_rssi(hci_con_handle_t con_handle){ 5012 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5013 if (hci_connection == NULL) return 0; 5014 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5015 hci_run(); 5016 return 1; 5017 } 5018 5019 /** 5020 * @brief Get connection type 5021 * @param con_handle 5022 * @result connection_type 5023 */ 5024 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5025 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5026 if (!conn) return GAP_CONNECTION_INVALID; 5027 switch (conn->address_type){ 5028 case BD_ADDR_TYPE_LE_PUBLIC: 5029 case BD_ADDR_TYPE_LE_RANDOM: 5030 return GAP_CONNECTION_LE; 5031 case BD_ADDR_TYPE_SCO: 5032 return GAP_CONNECTION_SCO; 5033 case BD_ADDR_TYPE_ACL: 5034 return GAP_CONNECTION_ACL; 5035 default: 5036 return GAP_CONNECTION_INVALID; 5037 } 5038 } 5039 5040 #ifdef ENABLE_BLE 5041 5042 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){ 5043 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5044 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5045 5046 conn->le_phy_update_all_phys = all_phys; 5047 conn->le_phy_update_tx_phys = tx_phys; 5048 conn->le_phy_update_rx_phys = rx_phys; 5049 conn->le_phy_update_phy_options = phy_options; 5050 5051 hci_run(); 5052 5053 return 0; 5054 } 5055 5056 #ifdef ENABLE_LE_CENTRAL 5057 /** 5058 * @brief Auto Connection Establishment - Start Connecting to device 5059 * @param address_typ 5060 * @param address 5061 * @returns 0 if ok 5062 */ 5063 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5064 // check capacity 5065 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5066 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5067 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5068 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5069 entry->address_type = address_type; 5070 (void)memcpy(entry->address, address, 6); 5071 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5072 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5073 hci_run(); 5074 return 0; 5075 } 5076 5077 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5078 btstack_linked_list_iterator_t it; 5079 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5080 while (btstack_linked_list_iterator_has_next(&it)){ 5081 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5082 if (entry->address_type != address_type) continue; 5083 if (memcmp(entry->address, address, 6) != 0) continue; 5084 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5085 // remove from controller if already present 5086 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5087 continue; 5088 } 5089 // direclty remove entry from whitelist 5090 btstack_linked_list_iterator_remove(&it); 5091 btstack_memory_whitelist_entry_free(entry); 5092 } 5093 } 5094 5095 /** 5096 * @brief Auto Connection Establishment - Stop Connecting to device 5097 * @param address_typ 5098 * @param address 5099 * @returns 0 if ok 5100 */ 5101 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5102 hci_remove_from_whitelist(address_type, address); 5103 hci_run(); 5104 return 0; 5105 } 5106 5107 /** 5108 * @brief Auto Connection Establishment - Stop everything 5109 * @note Convenience function to stop all active auto connection attempts 5110 */ 5111 void gap_auto_connection_stop_all(void){ 5112 btstack_linked_list_iterator_t it; 5113 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5114 while (btstack_linked_list_iterator_has_next(&it)){ 5115 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5116 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5117 // remove from controller if already present 5118 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5119 continue; 5120 } 5121 // directly remove entry from whitelist 5122 btstack_linked_list_iterator_remove(&it); 5123 btstack_memory_whitelist_entry_free(entry); 5124 } 5125 hci_run(); 5126 } 5127 5128 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5129 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5130 if (!conn) return 0; 5131 return conn->le_connection_interval; 5132 } 5133 #endif 5134 #endif 5135 5136 #ifdef ENABLE_CLASSIC 5137 /** 5138 * @brief Set Extended Inquiry Response data 5139 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5140 * @note has to be done before stack starts up 5141 */ 5142 void gap_set_extended_inquiry_response(const uint8_t * data){ 5143 hci_stack->eir_data = data; 5144 } 5145 5146 /** 5147 * @brief Start GAP Classic Inquiry 5148 * @param duration in 1.28s units 5149 * @return 0 if ok 5150 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5151 */ 5152 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5153 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5154 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5155 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5156 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5157 } 5158 hci_stack->inquiry_state = duration_in_1280ms_units; 5159 hci_run(); 5160 return 0; 5161 } 5162 5163 /** 5164 * @brief Stop GAP Classic Inquiry 5165 * @returns 0 if ok 5166 */ 5167 int gap_inquiry_stop(void){ 5168 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5169 // emit inquiry complete event, before it even started 5170 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5171 hci_emit_event(event, sizeof(event), 1); 5172 return 0; 5173 } 5174 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5175 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5176 hci_run(); 5177 return 0; 5178 } 5179 5180 5181 /** 5182 * @brief Remote Name Request 5183 * @param addr 5184 * @param page_scan_repetition_mode 5185 * @param clock_offset only used when bit 15 is set 5186 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5187 */ 5188 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5189 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5190 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5191 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5192 hci_stack->remote_name_clock_offset = clock_offset; 5193 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5194 hci_run(); 5195 return 0; 5196 } 5197 5198 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5199 hci_stack->gap_pairing_state = state; 5200 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5201 hci_run(); 5202 return 0; 5203 } 5204 5205 /** 5206 * @brief Legacy Pairing Pin Code Response 5207 * @param addr 5208 * @param pin 5209 * @return 0 if ok 5210 */ 5211 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5212 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5213 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5214 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5215 } 5216 5217 /** 5218 * @brief Abort Legacy Pairing 5219 * @param addr 5220 * @param pin 5221 * @return 0 if ok 5222 */ 5223 int gap_pin_code_negative(bd_addr_t addr){ 5224 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5225 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5226 } 5227 5228 /** 5229 * @brief SSP Passkey Response 5230 * @param addr 5231 * @param passkey 5232 * @return 0 if ok 5233 */ 5234 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5235 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5236 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5237 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5238 } 5239 5240 /** 5241 * @brief Abort SSP Passkey Entry/Pairing 5242 * @param addr 5243 * @param pin 5244 * @return 0 if ok 5245 */ 5246 int gap_ssp_passkey_negative(bd_addr_t addr){ 5247 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5248 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5249 } 5250 5251 /** 5252 * @brief Accept SSP Numeric Comparison 5253 * @param addr 5254 * @param passkey 5255 * @return 0 if ok 5256 */ 5257 int gap_ssp_confirmation_response(bd_addr_t addr){ 5258 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5259 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5260 } 5261 5262 /** 5263 * @brief Abort SSP Numeric Comparison/Pairing 5264 * @param addr 5265 * @param pin 5266 * @return 0 if ok 5267 */ 5268 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5269 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5270 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5271 } 5272 5273 /** 5274 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5275 * @param inquiry_mode see bluetooth_defines.h 5276 */ 5277 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5278 hci_stack->inquiry_mode = mode; 5279 } 5280 5281 /** 5282 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5283 */ 5284 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5285 hci_stack->sco_voice_setting = voice_setting; 5286 } 5287 5288 /** 5289 * @brief Get SCO Voice Setting 5290 * @return current voice setting 5291 */ 5292 uint16_t hci_get_sco_voice_setting(void){ 5293 return hci_stack->sco_voice_setting; 5294 } 5295 5296 static int hci_have_usb_transport(void){ 5297 if (!hci_stack->hci_transport) return 0; 5298 const char * transport_name = hci_stack->hci_transport->name; 5299 if (!transport_name) return 0; 5300 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5301 } 5302 5303 /** @brief Get SCO packet length for current SCO Voice setting 5304 * @note Using SCO packets of the exact length is required for USB transfer 5305 * @return Length of SCO packets in bytes (not audio frames) 5306 */ 5307 int hci_get_sco_packet_length(void){ 5308 int sco_packet_length = 0; 5309 5310 #ifdef ENABLE_SCO_OVER_HCI 5311 5312 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5313 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5314 5315 if (hci_have_usb_transport()){ 5316 // see Core Spec for H2 USB Transfer. 5317 // 3 byte SCO header + 24 bytes per connection 5318 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5319 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5320 } else { 5321 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5322 sco_packet_length = 3 + 60 * multiplier; 5323 // assert that it still fits inside an SCO buffer 5324 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5325 sco_packet_length = 3 + 60; 5326 } 5327 } 5328 #endif 5329 return sco_packet_length; 5330 } 5331 5332 /** 5333 * @brief Sets the master/slave policy 5334 * @param policy (0: attempt to become master, 1: let connecting device decide) 5335 */ 5336 void hci_set_master_slave_policy(uint8_t policy){ 5337 hci_stack->master_slave_policy = policy; 5338 } 5339 5340 #endif 5341 5342 HCI_STATE hci_get_state(void){ 5343 return hci_stack->state; 5344 } 5345 5346 #ifdef ENABLE_CLASSIC 5347 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5348 hci_stack->gap_classic_accept_callback = accept_callback; 5349 } 5350 #endif 5351 5352 /** 5353 * @brief Set callback for Bluetooth Hardware Error 5354 */ 5355 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5356 hci_stack->hardware_error_callback = fn; 5357 } 5358 5359 void hci_disconnect_all(void){ 5360 btstack_linked_list_iterator_t it; 5361 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5362 while (btstack_linked_list_iterator_has_next(&it)){ 5363 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5364 if (con->state == SENT_DISCONNECT) continue; 5365 con->state = SEND_DISCONNECT; 5366 } 5367 hci_run(); 5368 } 5369 5370 uint16_t hci_get_manufacturer(void){ 5371 return hci_stack->manufacturer; 5372 } 5373 5374 #ifdef ENABLE_BLE 5375 5376 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5377 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5378 if (!hci_con) return NULL; 5379 return &hci_con->sm_connection; 5380 } 5381 5382 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5383 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5384 5385 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5386 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5387 if (hci_connection == NULL) return 0; 5388 if (hci_is_le_connection(hci_connection)){ 5389 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5390 if (sm_conn->sm_connection_encrypted) { 5391 return sm_conn->sm_actual_encryption_key_size; 5392 } 5393 } 5394 #ifdef ENABLE_CLASSIC 5395 else { 5396 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5397 return hci_connection->encryption_key_size; 5398 } 5399 } 5400 #endif 5401 return 0; 5402 } 5403 5404 int gap_authenticated(hci_con_handle_t con_handle){ 5405 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5406 if (hci_connection == NULL) return 0; 5407 5408 switch (hci_connection->address_type){ 5409 case BD_ADDR_TYPE_LE_PUBLIC: 5410 case BD_ADDR_TYPE_LE_RANDOM: 5411 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5412 return hci_connection->sm_connection.sm_connection_authenticated; 5413 #ifdef ENABLE_CLASSIC 5414 case BD_ADDR_TYPE_SCO: 5415 case BD_ADDR_TYPE_ACL: 5416 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5417 #endif 5418 default: 5419 return 0; 5420 } 5421 } 5422 5423 int gap_secure_connection(hci_con_handle_t con_handle){ 5424 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5425 if (hci_connection == NULL) return 0; 5426 5427 switch (hci_connection->address_type){ 5428 case BD_ADDR_TYPE_LE_PUBLIC: 5429 case BD_ADDR_TYPE_LE_RANDOM: 5430 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5431 return hci_connection->sm_connection.sm_connection_sc; 5432 #ifdef ENABLE_CLASSIC 5433 case BD_ADDR_TYPE_SCO: 5434 case BD_ADDR_TYPE_ACL: 5435 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5436 #endif 5437 default: 5438 return 0; 5439 } 5440 } 5441 5442 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5443 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5444 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5445 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5446 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5447 return sm_conn->sm_connection_authorization_state; 5448 } 5449 #endif 5450 5451 #ifdef ENABLE_CLASSIC 5452 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){ 5453 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5454 if (!conn) return GAP_CONNECTION_INVALID; 5455 conn->sniff_min_interval = sniff_min_interval; 5456 conn->sniff_max_interval = sniff_max_interval; 5457 conn->sniff_attempt = sniff_attempt; 5458 conn->sniff_timeout = sniff_timeout; 5459 hci_run(); 5460 return 0; 5461 } 5462 5463 /** 5464 * @brief Exit Sniff mode 5465 * @param con_handle 5466 @ @return 0 if ok 5467 */ 5468 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5469 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5470 if (!conn) return GAP_CONNECTION_INVALID; 5471 conn->sniff_min_interval = 0xffff; 5472 hci_run(); 5473 return 0; 5474 } 5475 #endif 5476 5477 void hci_halting_defer(void){ 5478 if (hci_stack->state != HCI_STATE_HALTING) return; 5479 switch (hci_stack->substate){ 5480 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5481 case HCI_HALTING_CLOSE: 5482 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5483 break; 5484 default: 5485 break; 5486 } 5487 } 5488 5489 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5490 void hci_setup_test_connections_fuzz(void){ 5491 hci_connection_t * conn; 5492 5493 // default address: 66:55:44:33:00:01 5494 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5495 5496 // setup Controller info 5497 hci_stack->num_cmd_packets = 255; 5498 hci_stack->acl_packets_total_num = 255; 5499 5500 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5501 addr[5] = 0x01; 5502 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5503 conn->con_handle = addr[5]; 5504 conn->role = HCI_ROLE_SLAVE; 5505 conn->state = RECEIVED_CONNECTION_REQUEST; 5506 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5507 5508 // setup incoming Classic SCO connection with con handle 0x0002 5509 addr[5] = 0x02; 5510 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5511 conn->con_handle = addr[5]; 5512 conn->role = HCI_ROLE_SLAVE; 5513 conn->state = RECEIVED_CONNECTION_REQUEST; 5514 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5515 5516 // setup ready Classic ACL connection with con handle 0x0003 5517 addr[5] = 0x03; 5518 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5519 conn->con_handle = addr[5]; 5520 conn->role = HCI_ROLE_SLAVE; 5521 conn->state = OPEN; 5522 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5523 5524 // setup ready Classic SCO connection with con handle 0x0004 5525 addr[5] = 0x04; 5526 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5527 conn->con_handle = addr[5]; 5528 conn->role = HCI_ROLE_SLAVE; 5529 conn->state = OPEN; 5530 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5531 5532 // setup ready LE ACL connection with con handle 0x005 and public address 5533 addr[5] = 0x05; 5534 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5535 conn->con_handle = addr[5]; 5536 conn->role = HCI_ROLE_SLAVE; 5537 conn->state = OPEN; 5538 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5539 } 5540 5541 void hci_free_connections_fuzz(void){ 5542 btstack_linked_list_iterator_t it; 5543 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5544 while (btstack_linked_list_iterator_has_next(&it)){ 5545 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5546 btstack_linked_list_iterator_remove(&it); 5547 btstack_memory_hci_connection_free(con); 5548 } 5549 } 5550 void hci_simulate_working_fuzz(void){ 5551 hci_init_done(); 5552 hci_stack->num_cmd_packets = 255; 5553 } 5554 #endif 5555