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 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 216 return conn; 217 } 218 219 220 /** 221 * get le connection parameter range 222 * 223 * @return le connection parameter range struct 224 */ 225 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 226 *range = hci_stack->le_connection_parameter_range; 227 } 228 229 /** 230 * set le connection parameter range 231 * 232 */ 233 234 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 235 hci_stack->le_connection_parameter_range = *range; 236 } 237 238 /** 239 * @brief Test if connection parameters are inside in existing rage 240 * @param conn_interval_min (unit: 1.25ms) 241 * @param conn_interval_max (unit: 1.25ms) 242 * @param conn_latency 243 * @param supervision_timeout (unit: 10ms) 244 * @returns 1 if included 245 */ 246 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){ 247 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 248 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 249 250 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 251 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 252 253 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 254 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 255 256 return 1; 257 } 258 259 /** 260 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 261 * @note: default: 1 262 * @param max_peripheral_connections 263 */ 264 #ifdef ENABLE_LE_PERIPHERAL 265 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 266 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 267 } 268 #endif 269 270 /** 271 * get hci connections iterator 272 * 273 * @return hci connections iterator 274 */ 275 276 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 277 btstack_linked_list_iterator_init(it, &hci_stack->connections); 278 } 279 280 /** 281 * get connection for a given handle 282 * 283 * @return connection OR NULL, if not found 284 */ 285 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 286 btstack_linked_list_iterator_t it; 287 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 288 while (btstack_linked_list_iterator_has_next(&it)){ 289 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 290 if ( item->con_handle == con_handle ) { 291 return item; 292 } 293 } 294 return NULL; 295 } 296 297 /** 298 * get connection for given address 299 * 300 * @return connection OR NULL, if not found 301 */ 302 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 303 btstack_linked_list_iterator_t it; 304 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 305 while (btstack_linked_list_iterator_has_next(&it)){ 306 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 307 if (connection->address_type != addr_type) continue; 308 if (memcmp(addr, connection->address, 6) != 0) continue; 309 return connection; 310 } 311 return NULL; 312 } 313 314 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 315 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 316 } 317 318 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 319 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 320 } 321 322 #ifdef ENABLE_CLASSIC 323 324 #ifdef ENABLE_SCO_OVER_HCI 325 static int hci_number_sco_connections(void){ 326 int connections = 0; 327 btstack_linked_list_iterator_t it; 328 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 329 while (btstack_linked_list_iterator_has_next(&it)){ 330 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 331 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 332 connections++; 333 } 334 return connections; 335 } 336 #endif 337 338 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 339 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 340 #ifdef HAVE_EMBEDDED_TICK 341 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 342 // connections might be timed out 343 hci_emit_l2cap_check_timeout(connection); 344 } 345 #else 346 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 347 // connections might be timed out 348 hci_emit_l2cap_check_timeout(connection); 349 } 350 #endif 351 } 352 353 static void hci_connection_timestamp(hci_connection_t *connection){ 354 #ifdef HAVE_EMBEDDED_TICK 355 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 356 #else 357 connection->timestamp = btstack_run_loop_get_time_ms(); 358 #endif 359 } 360 361 /** 362 * add authentication flags and reset timer 363 * @note: assumes classic connection 364 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 365 */ 366 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 367 bd_addr_t addr; 368 reverse_bd_addr(bd_addr, addr); 369 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 370 if (conn) { 371 connectionSetAuthenticationFlags(conn, flags); 372 hci_connection_timestamp(conn); 373 } 374 } 375 376 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 377 hci_connection_t * conn = hci_connection_for_handle(handle); 378 if (!conn) return 0; 379 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 380 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 381 return 0; 382 } 383 384 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 385 if (!hci_stack->link_key_db) return; 386 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 387 hci_stack->link_key_db->delete_link_key(addr); 388 } 389 390 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 391 if (!hci_stack->link_key_db) return; 392 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 393 hci_stack->link_key_db->put_link_key(addr, link_key, type); 394 } 395 396 void gap_delete_all_link_keys(void){ 397 bd_addr_t addr; 398 link_key_t link_key; 399 link_key_type_t type; 400 btstack_link_key_iterator_t it; 401 int ok = gap_link_key_iterator_init(&it); 402 if (!ok) { 403 log_error("could not initialize iterator"); 404 return; 405 } 406 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 407 gap_drop_link_key_for_bd_addr(addr); 408 } 409 gap_link_key_iterator_done(&it); 410 } 411 412 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 413 if (!hci_stack->link_key_db) return 0; 414 if (!hci_stack->link_key_db->iterator_init) return 0; 415 return hci_stack->link_key_db->iterator_init(it); 416 } 417 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){ 418 if (!hci_stack->link_key_db) return 0; 419 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 420 } 421 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 422 if (!hci_stack->link_key_db) return; 423 hci_stack->link_key_db->iterator_done(it); 424 } 425 #endif 426 427 static int hci_is_le_connection(hci_connection_t * connection){ 428 switch (connection->address_type){ 429 case BD_ADDR_TYPE_LE_PUBLIC: 430 case BD_ADDR_TYPE_LE_RANDOM: 431 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 432 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 433 return 1; 434 default: 435 return 0; 436 } 437 } 438 439 /** 440 * count connections 441 */ 442 static int nr_hci_connections(void){ 443 int count = 0; 444 btstack_linked_item_t *it; 445 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 446 count++; 447 } 448 return count; 449 } 450 451 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 452 453 unsigned int num_packets_sent_classic = 0; 454 unsigned int num_packets_sent_le = 0; 455 456 btstack_linked_item_t *it; 457 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 458 hci_connection_t * connection = (hci_connection_t *) it; 459 if (hci_is_le_connection(connection)){ 460 num_packets_sent_le += connection->num_packets_sent; 461 } 462 if (connection->address_type == BD_ADDR_TYPE_ACL){ 463 num_packets_sent_classic += connection->num_packets_sent; 464 } 465 } 466 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 467 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 468 int free_slots_le = 0; 469 470 if (free_slots_classic < 0){ 471 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); 472 return 0; 473 } 474 475 if (hci_stack->le_acl_packets_total_num){ 476 // if we have LE slots, they are used 477 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 478 if (free_slots_le < 0){ 479 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); 480 return 0; 481 } 482 } else { 483 // otherwise, classic slots are used for LE, too 484 free_slots_classic -= num_packets_sent_le; 485 if (free_slots_classic < 0){ 486 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); 487 return 0; 488 } 489 } 490 491 switch (address_type){ 492 case BD_ADDR_TYPE_UNKNOWN: 493 log_error("hci_number_free_acl_slots: unknown address type"); 494 return 0; 495 496 case BD_ADDR_TYPE_ACL: 497 return free_slots_classic; 498 499 default: 500 if (hci_stack->le_acl_packets_total_num){ 501 return free_slots_le; 502 } 503 return free_slots_classic; 504 } 505 } 506 507 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 508 // get connection type 509 hci_connection_t * connection = hci_connection_for_handle(con_handle); 510 if (!connection){ 511 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 512 return 0; 513 } 514 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 515 } 516 517 #ifdef ENABLE_CLASSIC 518 static int hci_number_free_sco_slots(void){ 519 unsigned int num_sco_packets_sent = 0; 520 btstack_linked_item_t *it; 521 if (hci_stack->synchronous_flow_control_enabled){ 522 // explicit flow control 523 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 524 hci_connection_t * connection = (hci_connection_t *) it; 525 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 526 num_sco_packets_sent += connection->num_packets_sent; 527 } 528 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 529 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 530 return 0; 531 } 532 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 533 } else { 534 // implicit flow control -- TODO 535 int num_ready = 0; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 537 hci_connection_t * connection = (hci_connection_t *) it; 538 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 539 if (connection->sco_tx_ready == 0) continue; 540 num_ready++; 541 } 542 return num_ready; 543 } 544 } 545 #endif 546 547 // only used to send HCI Host Number Completed Packets 548 static int hci_can_send_comand_packet_transport(void){ 549 if (hci_stack->hci_packet_buffer_reserved) return 0; 550 551 // check for async hci transport implementations 552 if (hci_stack->hci_transport->can_send_packet_now){ 553 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 554 return 0; 555 } 556 } 557 return 1; 558 } 559 560 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 561 int hci_can_send_command_packet_now(void){ 562 if (hci_can_send_comand_packet_transport() == 0) return 0; 563 return hci_stack->num_cmd_packets > 0; 564 } 565 566 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 567 // check for async hci transport implementations 568 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 569 return hci_stack->hci_transport->can_send_packet_now(packet_type); 570 } 571 572 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 573 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 574 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 575 } 576 577 int hci_can_send_acl_le_packet_now(void){ 578 if (hci_stack->hci_packet_buffer_reserved) return 0; 579 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 580 } 581 582 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 583 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 584 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 585 } 586 587 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 588 if (hci_stack->hci_packet_buffer_reserved) return 0; 589 return hci_can_send_prepared_acl_packet_now(con_handle); 590 } 591 592 #ifdef ENABLE_CLASSIC 593 int hci_can_send_acl_classic_packet_now(void){ 594 if (hci_stack->hci_packet_buffer_reserved) return 0; 595 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 596 } 597 598 int hci_can_send_prepared_sco_packet_now(void){ 599 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 600 if (hci_have_usb_transport()){ 601 return hci_stack->sco_can_send_now; 602 } else { 603 return hci_number_free_sco_slots() > 0; 604 } 605 } 606 607 int hci_can_send_sco_packet_now(void){ 608 if (hci_stack->hci_packet_buffer_reserved) return 0; 609 return hci_can_send_prepared_sco_packet_now(); 610 } 611 612 void hci_request_sco_can_send_now_event(void){ 613 hci_stack->sco_waiting_for_can_send_now = 1; 614 hci_notify_if_sco_can_send_now(); 615 } 616 #endif 617 618 // used for internal checks in l2cap.c 619 int hci_is_packet_buffer_reserved(void){ 620 return hci_stack->hci_packet_buffer_reserved; 621 } 622 623 // reserves outgoing packet buffer. @returns 1 if successful 624 int hci_reserve_packet_buffer(void){ 625 if (hci_stack->hci_packet_buffer_reserved) { 626 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 627 return 0; 628 } 629 hci_stack->hci_packet_buffer_reserved = 1; 630 return 1; 631 } 632 633 void hci_release_packet_buffer(void){ 634 hci_stack->hci_packet_buffer_reserved = 0; 635 } 636 637 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 638 static int hci_transport_synchronous(void){ 639 return hci_stack->hci_transport->can_send_packet_now == NULL; 640 } 641 642 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 643 644 // 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); 645 646 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 647 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 648 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 649 max_acl_data_packet_length = hci_stack->le_data_packets_length; 650 } 651 652 // testing: reduce buffer to minimum 653 // max_acl_data_packet_length = 52; 654 655 log_debug("hci_send_acl_packet_fragments entered"); 656 657 int err; 658 // multiple packets could be send on a synchronous HCI transport 659 while (true){ 660 661 log_debug("hci_send_acl_packet_fragments loop entered"); 662 663 // get current data 664 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 665 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 666 int more_fragments = 0; 667 668 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 669 if (current_acl_data_packet_length > max_acl_data_packet_length){ 670 more_fragments = 1; 671 current_acl_data_packet_length = max_acl_data_packet_length; 672 } 673 674 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 675 if (acl_header_pos > 0){ 676 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 677 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 678 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 679 } 680 681 // update header len 682 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 683 684 // count packet 685 connection->num_packets_sent++; 686 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 687 688 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 689 if (more_fragments){ 690 // update start of next fragment to send 691 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 692 } else { 693 // done 694 hci_stack->acl_fragmentation_pos = 0; 695 hci_stack->acl_fragmentation_total_size = 0; 696 } 697 698 // send packet 699 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 700 const int size = current_acl_data_packet_length + 4; 701 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 702 hci_stack->acl_fragmentation_tx_active = 1; 703 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 704 705 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 706 707 // done yet? 708 if (!more_fragments) break; 709 710 // can send more? 711 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 712 } 713 714 log_debug("hci_send_acl_packet_fragments loop over"); 715 716 // release buffer now for synchronous transport 717 if (hci_transport_synchronous()){ 718 hci_stack->acl_fragmentation_tx_active = 0; 719 hci_release_packet_buffer(); 720 hci_emit_transport_packet_sent(); 721 } 722 723 return err; 724 } 725 726 // pre: caller has reserved the packet buffer 727 int hci_send_acl_packet_buffer(int size){ 728 729 // log_info("hci_send_acl_packet_buffer size %u", size); 730 731 if (!hci_stack->hci_packet_buffer_reserved) { 732 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 733 return 0; 734 } 735 736 uint8_t * packet = hci_stack->hci_packet_buffer; 737 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 738 739 // check for free places on Bluetooth module 740 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 741 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 742 hci_release_packet_buffer(); 743 hci_emit_transport_packet_sent(); 744 return BTSTACK_ACL_BUFFERS_FULL; 745 } 746 747 hci_connection_t *connection = hci_connection_for_handle( con_handle); 748 if (!connection) { 749 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 750 hci_release_packet_buffer(); 751 hci_emit_transport_packet_sent(); 752 return 0; 753 } 754 755 #ifdef ENABLE_CLASSIC 756 hci_connection_timestamp(connection); 757 #endif 758 759 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 760 761 // setup data 762 hci_stack->acl_fragmentation_total_size = size; 763 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 764 765 return hci_send_acl_packet_fragments(connection); 766 } 767 768 #ifdef ENABLE_CLASSIC 769 // pre: caller has reserved the packet buffer 770 int hci_send_sco_packet_buffer(int size){ 771 772 // log_info("hci_send_acl_packet_buffer size %u", size); 773 774 if (!hci_stack->hci_packet_buffer_reserved) { 775 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 776 return 0; 777 } 778 779 uint8_t * packet = hci_stack->hci_packet_buffer; 780 781 // skip checks in loopback mode 782 if (!hci_stack->loopback_mode){ 783 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 784 785 // check for free places on Bluetooth module 786 if (!hci_can_send_prepared_sco_packet_now()) { 787 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 788 hci_release_packet_buffer(); 789 hci_emit_transport_packet_sent(); 790 return BTSTACK_ACL_BUFFERS_FULL; 791 } 792 793 // track send packet in connection struct 794 hci_connection_t *connection = hci_connection_for_handle( con_handle); 795 if (!connection) { 796 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 797 hci_release_packet_buffer(); 798 hci_emit_transport_packet_sent(); 799 return 0; 800 } 801 802 if (hci_have_usb_transport()){ 803 // token used 804 hci_stack->sco_can_send_now = 0; 805 } else { 806 if (hci_stack->synchronous_flow_control_enabled){ 807 connection->num_packets_sent++; 808 } else { 809 connection->sco_tx_ready--; 810 } 811 } 812 } 813 814 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 815 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 816 817 if (hci_transport_synchronous()){ 818 hci_release_packet_buffer(); 819 hci_emit_transport_packet_sent(); 820 } 821 822 return err; 823 } 824 #endif 825 826 static void acl_handler(uint8_t *packet, int size){ 827 828 // log_info("acl_handler: size %u", size); 829 830 // get info 831 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 832 hci_connection_t *conn = hci_connection_for_handle(con_handle); 833 uint8_t acl_flags = READ_ACL_FLAGS(packet); 834 uint16_t acl_length = READ_ACL_LENGTH(packet); 835 836 // ignore non-registered handle 837 if (!conn){ 838 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 839 return; 840 } 841 842 // assert packet is complete 843 if ((acl_length + 4) != size){ 844 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 845 return; 846 } 847 848 #ifdef ENABLE_CLASSIC 849 // update idle timestamp 850 hci_connection_timestamp(conn); 851 #endif 852 853 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 854 hci_stack->host_completed_packets = 1; 855 conn->num_packets_completed++; 856 #endif 857 858 // handle different packet types 859 switch (acl_flags & 0x03) { 860 861 case 0x01: // continuation fragment 862 863 // sanity checks 864 if (conn->acl_recombination_pos == 0) { 865 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 866 return; 867 } 868 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 869 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 870 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 871 conn->acl_recombination_pos = 0; 872 return; 873 } 874 875 // append fragment payload (header already stored) 876 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 877 &packet[4], acl_length); 878 conn->acl_recombination_pos += acl_length; 879 880 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 881 // conn->acl_recombination_pos, conn->acl_recombination_length); 882 883 // forward complete L2CAP packet if complete. 884 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 885 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 886 // reset recombination buffer 887 conn->acl_recombination_length = 0; 888 conn->acl_recombination_pos = 0; 889 } 890 break; 891 892 case 0x02: { // first fragment 893 894 // sanity check 895 if (conn->acl_recombination_pos) { 896 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 897 conn->acl_recombination_pos = 0; 898 } 899 900 // peek into L2CAP packet! 901 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 902 903 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 904 905 // compare fragment size to L2CAP packet size 906 if (acl_length >= (l2cap_length + 4)){ 907 // forward fragment as L2CAP packet 908 hci_emit_acl_packet(packet, acl_length + 4); 909 } else { 910 911 if (acl_length > HCI_ACL_BUFFER_SIZE){ 912 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 913 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 914 return; 915 } 916 917 // store first fragment and tweak acl length for complete package 918 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 919 packet, acl_length + 4); 920 conn->acl_recombination_pos = acl_length + 4; 921 conn->acl_recombination_length = l2cap_length; 922 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 923 } 924 break; 925 926 } 927 default: 928 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 929 return; 930 } 931 932 // execute main loop 933 hci_run(); 934 } 935 936 static void hci_shutdown_connection(hci_connection_t *conn){ 937 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 938 939 #ifdef ENABLE_CLASSIC 940 #ifdef ENABLE_SCO_OVER_HCI 941 int addr_type = conn->address_type; 942 #endif 943 #endif 944 945 btstack_run_loop_remove_timer(&conn->timeout); 946 947 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 948 btstack_memory_hci_connection_free( conn ); 949 950 // now it's gone 951 hci_emit_nr_connections_changed(); 952 953 #ifdef ENABLE_CLASSIC 954 #ifdef ENABLE_SCO_OVER_HCI 955 // update SCO 956 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 957 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 958 } 959 #endif 960 #endif 961 } 962 963 #ifdef ENABLE_CLASSIC 964 965 static const uint16_t packet_type_sizes[] = { 966 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 967 HCI_ACL_DH1_SIZE, 0, 0, 0, 968 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 969 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 970 }; 971 static const uint8_t packet_type_feature_requirement_bit[] = { 972 0, // 3 slot packets 973 1, // 5 slot packets 974 25, // EDR 2 mpbs 975 26, // EDR 3 mbps 976 39, // 3 slot EDR packts 977 40, // 5 slot EDR packet 978 }; 979 static const uint16_t packet_type_feature_packet_mask[] = { 980 0x0f00, // 3 slot packets 981 0xf000, // 5 slot packets 982 0x1102, // EDR 2 mpbs 983 0x2204, // EDR 3 mbps 984 0x0300, // 3 slot EDR packts 985 0x3000, // 5 slot EDR packet 986 }; 987 988 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 989 // enable packet types based on size 990 uint16_t packet_types = 0; 991 unsigned int i; 992 for (i=0;i<16;i++){ 993 if (packet_type_sizes[i] == 0) continue; 994 if (packet_type_sizes[i] <= buffer_size){ 995 packet_types |= 1 << i; 996 } 997 } 998 // disable packet types due to missing local supported features 999 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1000 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1001 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1002 if (feature_set) continue; 1003 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1004 packet_types &= ~packet_type_feature_packet_mask[i]; 1005 } 1006 // flip bits for "may not be used" 1007 packet_types ^= 0x3306; 1008 return packet_types; 1009 } 1010 1011 uint16_t hci_usable_acl_packet_types(void){ 1012 return hci_stack->packet_types; 1013 } 1014 #endif 1015 1016 uint8_t* hci_get_outgoing_packet_buffer(void){ 1017 // hci packet buffer is >= acl data packet length 1018 return hci_stack->hci_packet_buffer; 1019 } 1020 1021 uint16_t hci_max_acl_data_packet_length(void){ 1022 return hci_stack->acl_data_packet_length; 1023 } 1024 1025 #ifdef ENABLE_CLASSIC 1026 int hci_extended_sco_link_supported(void){ 1027 // No. 31, byte 3, bit 7 1028 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1029 } 1030 #endif 1031 1032 int hci_non_flushable_packet_boundary_flag_supported(void){ 1033 // No. 54, byte 6, bit 6 1034 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1035 } 1036 1037 static int gap_ssp_supported(void){ 1038 // No. 51, byte 6, bit 3 1039 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1040 } 1041 1042 static int hci_classic_supported(void){ 1043 #ifdef ENABLE_CLASSIC 1044 // No. 37, byte 4, bit 5, = No BR/EDR Support 1045 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1046 #else 1047 return 0; 1048 #endif 1049 } 1050 1051 static int hci_le_supported(void){ 1052 #ifdef ENABLE_BLE 1053 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1054 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1055 #else 1056 return 0; 1057 #endif 1058 } 1059 1060 #ifdef ENABLE_BLE 1061 1062 /** 1063 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1064 */ 1065 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1066 *addr_type = hci_stack->le_own_addr_type; 1067 if (hci_stack->le_own_addr_type){ 1068 (void)memcpy(addr, hci_stack->le_random_address, 6); 1069 } else { 1070 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1071 } 1072 } 1073 1074 #ifdef ENABLE_LE_CENTRAL 1075 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1076 1077 int offset = 3; 1078 int num_reports = packet[offset]; 1079 offset += 1; 1080 1081 int i; 1082 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1083 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1084 for (i=0; (i<num_reports) && (offset < size);i++){ 1085 // sanity checks on data_length: 1086 uint8_t data_length = packet[offset + 8]; 1087 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1088 if ((offset + 9 + data_length + 1) > size) return; 1089 // setup event 1090 uint8_t event_size = 10 + data_length; 1091 int pos = 0; 1092 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1093 event[pos++] = event_size; 1094 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1095 offset += 8; 1096 pos += 8; 1097 event[pos++] = packet[offset + 1 + data_length]; // rssi 1098 event[pos++] = data_length; 1099 offset++; 1100 (void)memcpy(&event[pos], &packet[offset], data_length); 1101 pos += data_length; 1102 offset += data_length + 1; // rssi 1103 hci_emit_event(event, pos, 1); 1104 } 1105 } 1106 #endif 1107 #endif 1108 1109 #ifdef ENABLE_BLE 1110 #ifdef ENABLE_LE_PERIPHERAL 1111 static void hci_reenable_advertisements_if_needed(void){ 1112 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1113 // get number of active le slave connections 1114 int num_slave_connections = 0; 1115 btstack_linked_list_iterator_t it; 1116 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1117 while (btstack_linked_list_iterator_has_next(&it)){ 1118 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1119 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1120 if (con->state != OPEN) continue; 1121 if (con->role != HCI_ROLE_SLAVE) continue; 1122 if (!hci_is_le_connection(con)) continue; 1123 num_slave_connections++; 1124 } 1125 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1126 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1127 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1128 } 1129 } 1130 } 1131 #endif 1132 #endif 1133 1134 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1135 1136 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1137 if (!hci_stack->config) return 0; 1138 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1139 // Limit baud rate for Broadcom chipsets to 3 mbps 1140 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1141 baud_rate = 3000000; 1142 } 1143 return baud_rate; 1144 } 1145 1146 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1147 UNUSED(ds); 1148 1149 switch (hci_stack->substate){ 1150 case HCI_INIT_W4_SEND_RESET: 1151 log_info("Resend HCI Reset"); 1152 hci_stack->substate = HCI_INIT_SEND_RESET; 1153 hci_stack->num_cmd_packets = 1; 1154 hci_run(); 1155 break; 1156 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1157 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1158 if (hci_stack->hci_transport->reset_link){ 1159 hci_stack->hci_transport->reset_link(); 1160 } 1161 1162 /* fall through */ 1163 1164 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1165 log_info("Resend HCI Reset - CSR Warm Boot"); 1166 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1167 hci_stack->num_cmd_packets = 1; 1168 hci_run(); 1169 break; 1170 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1171 if (hci_stack->hci_transport->set_baudrate){ 1172 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1173 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1174 hci_stack->hci_transport->set_baudrate(baud_rate); 1175 } 1176 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1177 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1178 if (hci_stack->hci_transport->reset_link){ 1179 log_info("Link Reset"); 1180 hci_stack->hci_transport->reset_link(); 1181 } 1182 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1183 hci_run(); 1184 } 1185 break; 1186 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1187 // otherwise continue 1188 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1189 hci_send_cmd(&hci_read_local_supported_commands); 1190 break; 1191 default: 1192 break; 1193 } 1194 } 1195 #endif 1196 1197 static void hci_initializing_next_state(void){ 1198 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1199 } 1200 1201 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1202 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1203 const int bd_addr_string_len = 17; 1204 int i = 0; 1205 while (i < (size - bd_addr_string_len)){ 1206 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1207 i++; 1208 continue; 1209 } 1210 // set real address 1211 (void)memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), 1212 bd_addr_string_len); 1213 i += bd_addr_string_len; 1214 } 1215 } 1216 #endif 1217 1218 // assumption: hci_can_send_command_packet_now() == true 1219 static void hci_initializing_run(void){ 1220 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1221 switch (hci_stack->substate){ 1222 case HCI_INIT_SEND_RESET: 1223 hci_state_reset(); 1224 1225 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1226 // prepare reset if command complete not received in 100ms 1227 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1228 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1229 btstack_run_loop_add_timer(&hci_stack->timeout); 1230 #endif 1231 // send command 1232 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1233 hci_send_cmd(&hci_reset); 1234 break; 1235 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1236 hci_send_cmd(&hci_read_local_version_information); 1237 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1238 break; 1239 case HCI_INIT_SEND_READ_LOCAL_NAME: 1240 hci_send_cmd(&hci_read_local_name); 1241 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1242 break; 1243 1244 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1245 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1246 hci_state_reset(); 1247 // prepare reset if command complete not received in 100ms 1248 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1249 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1250 btstack_run_loop_add_timer(&hci_stack->timeout); 1251 // send command 1252 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1253 hci_send_cmd(&hci_reset); 1254 break; 1255 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1256 hci_state_reset(); 1257 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1258 hci_send_cmd(&hci_reset); 1259 break; 1260 case HCI_INIT_SEND_BAUD_CHANGE: { 1261 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1262 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1263 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1264 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1265 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1266 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1267 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1268 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1269 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1270 btstack_run_loop_add_timer(&hci_stack->timeout); 1271 } 1272 break; 1273 } 1274 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1275 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1276 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1277 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1278 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1279 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1280 break; 1281 } 1282 case HCI_INIT_CUSTOM_INIT: 1283 // Custom initialization 1284 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1285 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1286 int send_cmd = 0; 1287 switch (hci_stack->chipset_result){ 1288 case BTSTACK_CHIPSET_VALID_COMMAND: 1289 send_cmd = 1; 1290 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1291 break; 1292 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1293 send_cmd = 1; 1294 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1295 log_info("CSR Warm Boot"); 1296 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1297 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1298 btstack_run_loop_add_timer(&hci_stack->timeout); 1299 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1300 && hci_stack->config 1301 && hci_stack->chipset 1302 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1303 && hci_stack->hci_transport->set_baudrate 1304 && hci_transport_uart_get_main_baud_rate()){ 1305 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1306 } else { 1307 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1308 } 1309 break; 1310 default: 1311 break; 1312 } 1313 1314 if (send_cmd){ 1315 int size = 3 + hci_stack->hci_packet_buffer[2]; 1316 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1317 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1318 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1319 break; 1320 } 1321 log_info("Init script done"); 1322 1323 // Init script download on Broadcom chipsets causes: 1324 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1325 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1326 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1327 1328 // - baud rate to reset, restore UART baud rate if needed 1329 int need_baud_change = hci_stack->config 1330 && hci_stack->chipset 1331 && hci_stack->chipset->set_baudrate_command 1332 && hci_stack->hci_transport->set_baudrate 1333 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1334 if (need_baud_change) { 1335 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1336 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1337 hci_stack->hci_transport->set_baudrate(baud_rate); 1338 } 1339 1340 uint16_t bcm_delay_ms = 300; 1341 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1342 // -> Work around: wait here. 1343 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1344 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1345 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1346 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1347 btstack_run_loop_add_timer(&hci_stack->timeout); 1348 break; 1349 } 1350 } 1351 // otherwise continue 1352 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1353 hci_send_cmd(&hci_read_local_supported_commands); 1354 break; 1355 case HCI_INIT_SET_BD_ADDR: 1356 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1357 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1358 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1359 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1360 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1361 break; 1362 #endif 1363 1364 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1365 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1366 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1367 hci_send_cmd(&hci_read_local_supported_commands); 1368 break; 1369 case HCI_INIT_READ_BD_ADDR: 1370 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1371 hci_send_cmd(&hci_read_bd_addr); 1372 break; 1373 case HCI_INIT_READ_BUFFER_SIZE: 1374 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1375 hci_send_cmd(&hci_read_buffer_size); 1376 break; 1377 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1378 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1379 hci_send_cmd(&hci_read_local_supported_features); 1380 break; 1381 1382 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1383 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1384 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1385 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1386 break; 1387 case HCI_INIT_HOST_BUFFER_SIZE: 1388 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1389 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1390 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1391 break; 1392 #endif 1393 1394 case HCI_INIT_SET_EVENT_MASK: 1395 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1396 if (hci_le_supported()){ 1397 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1398 } else { 1399 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1400 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1401 } 1402 break; 1403 1404 #ifdef ENABLE_CLASSIC 1405 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1407 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1408 break; 1409 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1410 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1411 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1412 break; 1413 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1414 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1415 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1416 break; 1417 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1418 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1419 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1420 break; 1421 case HCI_INIT_WRITE_LOCAL_NAME: { 1422 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1423 hci_reserve_packet_buffer(); 1424 uint8_t * packet = hci_stack->hci_packet_buffer; 1425 // construct HCI Command and send 1426 uint16_t opcode = hci_write_local_name.opcode; 1427 hci_stack->last_cmd_opcode = opcode; 1428 packet[0] = opcode & 0xff; 1429 packet[1] = opcode >> 8; 1430 packet[2] = DEVICE_NAME_LEN; 1431 memset(&packet[3], 0, DEVICE_NAME_LEN); 1432 (void)memcpy(&packet[3], hci_stack->local_name, 1433 strlen(hci_stack->local_name)); 1434 // expand '00:00:00:00:00:00' in name with bd_addr 1435 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1436 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1437 break; 1438 } 1439 case HCI_INIT_WRITE_EIR_DATA: { 1440 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1441 hci_reserve_packet_buffer(); 1442 uint8_t * packet = hci_stack->hci_packet_buffer; 1443 // construct HCI Command and send 1444 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1445 hci_stack->last_cmd_opcode = opcode; 1446 packet[0] = opcode & 0xff; 1447 packet[1] = opcode >> 8; 1448 packet[2] = 1 + 240; 1449 packet[3] = 0; // FEC not required 1450 if (hci_stack->eir_data){ 1451 (void)memcpy(&packet[4], hci_stack->eir_data, 240); 1452 } else { 1453 memset(&packet[4], 0, 240); 1454 int name_len = strlen(hci_stack->local_name); 1455 packet[4] = name_len + 1; 1456 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1457 (void)memcpy(&packet[6], hci_stack->local_name, name_len); 1458 } 1459 // expand '00:00:00:00:00:00' in name with bd_addr 1460 hci_replace_bd_addr_placeholder(&packet[4], 240); 1461 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1462 break; 1463 } 1464 case HCI_INIT_WRITE_INQUIRY_MODE: 1465 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1466 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1467 break; 1468 case HCI_INIT_WRITE_SCAN_ENABLE: 1469 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1470 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1471 break; 1472 // only sent if ENABLE_SCO_OVER_HCI is defined 1473 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1474 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1475 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1476 break; 1477 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1478 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1479 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1480 break; 1481 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1482 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1483 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1484 log_info("BCM: Route SCO data via HCI transport"); 1485 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1486 break; 1487 1488 #endif 1489 #ifdef ENABLE_BLE 1490 // LE INIT 1491 case HCI_INIT_LE_READ_BUFFER_SIZE: 1492 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1493 hci_send_cmd(&hci_le_read_buffer_size); 1494 break; 1495 case HCI_INIT_LE_SET_EVENT_MASK: 1496 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1497 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1498 break; 1499 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1500 // LE Supported Host = 1, Simultaneous Host = 0 1501 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1502 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1503 break; 1504 #endif 1505 1506 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1507 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1508 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1509 hci_send_cmd(&hci_le_read_maximum_data_length); 1510 break; 1511 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1512 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1513 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1514 break; 1515 #endif 1516 1517 #ifdef ENABLE_LE_CENTRAL 1518 case HCI_INIT_READ_WHITE_LIST_SIZE: 1519 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1520 hci_send_cmd(&hci_le_read_white_list_size); 1521 break; 1522 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1523 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1524 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1525 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); 1526 break; 1527 #endif 1528 default: 1529 return; 1530 } 1531 } 1532 1533 static void hci_init_done(void){ 1534 // done. tell the app 1535 log_info("hci_init_done -> HCI_STATE_WORKING"); 1536 hci_stack->state = HCI_STATE_WORKING; 1537 hci_emit_state(); 1538 hci_run(); 1539 } 1540 1541 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1542 bool command_completed = false; 1543 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1544 uint16_t opcode = little_endian_read_16(packet,3); 1545 if (opcode == hci_stack->last_cmd_opcode){ 1546 command_completed = true; 1547 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1548 } else { 1549 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1550 } 1551 } 1552 1553 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1554 uint8_t status = packet[2]; 1555 uint16_t opcode = little_endian_read_16(packet,4); 1556 if (opcode == hci_stack->last_cmd_opcode){ 1557 if (status){ 1558 command_completed = true; 1559 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1560 } else { 1561 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1562 } 1563 } else { 1564 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1565 } 1566 } 1567 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1568 // Vendor == CSR 1569 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1570 // TODO: track actual command 1571 command_completed = true; 1572 } 1573 1574 // Vendor == Toshiba 1575 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1576 // TODO: track actual command 1577 command_completed = true; 1578 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1579 hci_stack->num_cmd_packets = 1; 1580 } 1581 #endif 1582 1583 return command_completed; 1584 } 1585 1586 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1587 1588 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1589 1590 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1591 1592 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1593 1594 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1595 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1596 // 1597 // HCI Reset 1598 // Timeout 100 ms 1599 // HCI Reset 1600 // Command Complete Reset 1601 // HCI Read Local Version Information 1602 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1603 // hang... 1604 // 1605 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1606 if (!command_completed 1607 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1608 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1609 1610 uint16_t opcode = little_endian_read_16(packet,3); 1611 if (opcode == hci_reset.opcode){ 1612 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1613 return; 1614 } 1615 } 1616 1617 // CSR & H5 1618 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1619 if (!command_completed 1620 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1621 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1622 1623 uint16_t opcode = little_endian_read_16(packet,3); 1624 if (opcode == hci_reset.opcode){ 1625 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1626 return; 1627 } 1628 } 1629 1630 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1631 // fix: Correct substate and behave as command below 1632 if (command_completed){ 1633 switch (hci_stack->substate){ 1634 case HCI_INIT_SEND_RESET: 1635 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1636 break; 1637 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1638 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1639 break; 1640 default: 1641 break; 1642 } 1643 } 1644 1645 #endif 1646 1647 if (!command_completed) return; 1648 1649 bool need_baud_change = false; 1650 bool need_addr_change = false; 1651 1652 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1653 need_baud_change = hci_stack->config 1654 && hci_stack->chipset 1655 && hci_stack->chipset->set_baudrate_command 1656 && hci_stack->hci_transport->set_baudrate 1657 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1658 1659 need_addr_change = hci_stack->custom_bd_addr_set 1660 && hci_stack->chipset 1661 && hci_stack->chipset->set_bd_addr_command; 1662 #endif 1663 1664 switch(hci_stack->substate){ 1665 1666 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1667 case HCI_INIT_SEND_RESET: 1668 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1669 // fix: just correct substate and behave as command below 1670 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1671 btstack_run_loop_remove_timer(&hci_stack->timeout); 1672 break; 1673 case HCI_INIT_W4_SEND_RESET: 1674 btstack_run_loop_remove_timer(&hci_stack->timeout); 1675 break; 1676 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1677 log_info("Received local name, need baud change %d", (int) need_baud_change); 1678 if (need_baud_change){ 1679 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1680 return; 1681 } 1682 // skip baud change 1683 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1684 return; 1685 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1686 // for STLC2500D, baud rate change already happened. 1687 // for others, baud rate gets changed now 1688 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1689 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1690 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1691 hci_stack->hci_transport->set_baudrate(baud_rate); 1692 } 1693 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1694 return; 1695 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1696 btstack_run_loop_remove_timer(&hci_stack->timeout); 1697 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1698 return; 1699 case HCI_INIT_W4_CUSTOM_INIT: 1700 // repeat custom init 1701 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1702 return; 1703 #else 1704 case HCI_INIT_W4_SEND_RESET: 1705 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1706 return ; 1707 #endif 1708 1709 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1710 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1711 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1712 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1713 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1714 return; 1715 } 1716 if (need_addr_change){ 1717 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1718 return; 1719 } 1720 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1721 return; 1722 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1723 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1724 if (need_baud_change){ 1725 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1726 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1727 hci_stack->hci_transport->set_baudrate(baud_rate); 1728 } 1729 if (need_addr_change){ 1730 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1731 return; 1732 } 1733 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1734 return; 1735 case HCI_INIT_W4_SET_BD_ADDR: 1736 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1737 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1738 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1739 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1740 return; 1741 } 1742 // skipping st warm boot 1743 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1744 return; 1745 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1746 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1747 return; 1748 #endif 1749 case HCI_INIT_W4_READ_BD_ADDR: 1750 // only read buffer size if supported 1751 if (hci_stack->local_supported_commands[0] & 0x01) { 1752 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1753 return; 1754 } 1755 // skipping read buffer size 1756 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1757 return; 1758 case HCI_INIT_W4_SET_EVENT_MASK: 1759 // skip Classic init commands for LE only chipsets 1760 if (!hci_classic_supported()){ 1761 #ifdef ENABLE_BLE 1762 if (hci_le_supported()){ 1763 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1764 return; 1765 } 1766 #endif 1767 log_error("Neither BR/EDR nor LE supported"); 1768 hci_init_done(); 1769 return; 1770 } 1771 if (!gap_ssp_supported()){ 1772 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1773 return; 1774 } 1775 break; 1776 #ifdef ENABLE_BLE 1777 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1778 // skip write le host if not supported (e.g. on LE only EM9301) 1779 if (hci_stack->local_supported_commands[0] & 0x02) break; 1780 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1781 return; 1782 1783 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1784 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1785 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1786 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1787 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1788 return; 1789 } 1790 // explicit fall through to reduce repetitions 1791 1792 #ifdef ENABLE_LE_CENTRAL 1793 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1794 #else 1795 hci_init_done(); 1796 #endif 1797 return; 1798 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1799 1800 #endif /* ENABLE_BLE */ 1801 1802 #ifdef ENABLE_SCO_OVER_HCI 1803 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1804 // skip write synchronous flow control if not supported 1805 if (hci_stack->local_supported_commands[0] & 0x04) break; 1806 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1807 1808 /* fall through */ 1809 1810 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1811 // skip write default erroneous data reporting if not supported 1812 if (hci_stack->local_supported_commands[0] & 0x08) break; 1813 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1814 1815 /* fall through */ 1816 1817 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1818 // skip bcm set sco pcm config on non-Broadcom chipsets 1819 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1820 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1821 1822 /* fall through */ 1823 1824 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1825 if (!hci_le_supported()){ 1826 // SKIP LE init for Classic only configuration 1827 hci_init_done(); 1828 return; 1829 } 1830 break; 1831 1832 #else /* !ENABLE_SCO_OVER_HCI */ 1833 1834 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1835 #ifdef ENABLE_BLE 1836 if (hci_le_supported()){ 1837 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1838 return; 1839 } 1840 #endif 1841 // SKIP LE init for Classic only configuration 1842 hci_init_done(); 1843 return; 1844 #endif /* ENABLE_SCO_OVER_HCI */ 1845 1846 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1847 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1848 // Response to command before init done state -> init done 1849 case (HCI_INIT_DONE-1): 1850 hci_init_done(); 1851 return; 1852 #endif 1853 1854 default: 1855 break; 1856 } 1857 hci_initializing_next_state(); 1858 } 1859 1860 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1861 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1862 bd_addr_t bd_address; 1863 (void)memcpy(&bd_address, conn->address, 6); 1864 1865 #ifdef ENABLE_CLASSIC 1866 // cache needed data 1867 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1868 #endif 1869 1870 // connection failed, remove entry 1871 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1872 btstack_memory_hci_connection_free( conn ); 1873 1874 #ifdef ENABLE_CLASSIC 1875 // notify client if dedicated bonding 1876 if (notify_dedicated_bonding_failed){ 1877 log_info("hci notify_dedicated_bonding_failed"); 1878 hci_emit_dedicated_bonding_result(bd_address, status); 1879 } 1880 1881 // if authentication error, also delete link key 1882 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1883 gap_drop_link_key_for_bd_addr(bd_address); 1884 } 1885 #endif 1886 } 1887 1888 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1889 // handle BT initialization 1890 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1891 hci_initializing_event_handler(packet, size); 1892 } 1893 1894 // help with BT sleep 1895 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1896 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1897 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1898 hci_initializing_next_state(); 1899 } 1900 } 1901 1902 static void event_handler(uint8_t *packet, int size){ 1903 1904 uint16_t event_length = packet[1]; 1905 1906 // assert packet is complete 1907 if (size != (event_length + 2)){ 1908 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1909 return; 1910 } 1911 1912 bd_addr_t addr; 1913 bd_addr_type_t addr_type; 1914 hci_con_handle_t handle; 1915 hci_connection_t * conn; 1916 int i; 1917 int create_connection_cmd; 1918 1919 #ifdef ENABLE_CLASSIC 1920 uint8_t link_type; 1921 #endif 1922 1923 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1924 1925 switch (hci_event_packet_get_type(packet)) { 1926 1927 case HCI_EVENT_COMMAND_COMPLETE: 1928 // get num cmd packets - limit to 1 to reduce complexity 1929 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1930 1931 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1932 if (packet[5]) break; 1933 // terminate, name 248 chars 1934 packet[6+248] = 0; 1935 log_info("local name: %s", &packet[6]); 1936 } 1937 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1938 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1939 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1940 uint16_t acl_len = little_endian_read_16(packet, 6); 1941 uint16_t sco_len = packet[8]; 1942 1943 // determine usable ACL/SCO payload size 1944 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1945 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1946 1947 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1948 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1949 1950 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1951 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1952 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1953 } 1954 } 1955 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1956 if (packet[5] == 0){ 1957 uint8_t event[5]; 1958 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1959 event[1] = 3; 1960 (void)memcpy(&event[2], &packet[6], 3); 1961 hci_emit_event(event, sizeof(event), 1); 1962 } 1963 } 1964 #ifdef ENABLE_BLE 1965 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1966 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1967 hci_stack->le_acl_packets_total_num = packet[8]; 1968 // determine usable ACL payload size 1969 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1970 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1971 } 1972 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1973 } 1974 #endif 1975 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1976 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1977 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1978 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1979 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); 1980 } 1981 #endif 1982 #ifdef ENABLE_LE_CENTRAL 1983 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1984 hci_stack->le_whitelist_capacity = packet[6]; 1985 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1986 } 1987 #endif 1988 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1989 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1990 hci_stack->local_bd_addr); 1991 log_info("Local Address, Status: 0x%02x: Addr: %s", 1992 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1993 #ifdef ENABLE_CLASSIC 1994 if (hci_stack->link_key_db){ 1995 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1996 } 1997 #endif 1998 } 1999 #ifdef ENABLE_CLASSIC 2000 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2001 hci_emit_discoverable_enabled(hci_stack->discoverable); 2002 } 2003 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2004 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2005 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2006 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2007 hci_emit_event(event, sizeof(event), 1); 2008 } 2009 } 2010 #endif 2011 2012 // Note: HCI init checks 2013 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2014 (void)memcpy(hci_stack->local_supported_features, 2015 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2016 8); 2017 2018 #ifdef ENABLE_CLASSIC 2019 // determine usable ACL packet types based on host buffer size and supported features 2020 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2021 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2022 #endif 2023 // Classic/LE 2024 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2025 } 2026 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2027 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2028 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2029 uint16_t manufacturer = little_endian_read_16(packet, 10); 2030 // map Cypress to Broadcom 2031 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2032 log_info("Treat Cypress as Broadcom"); 2033 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2034 little_endian_store_16(packet, 10, manufacturer); 2035 } 2036 hci_stack->manufacturer = manufacturer; 2037 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2038 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2039 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2040 } 2041 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2042 hci_stack->local_supported_commands[0] = 2043 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2044 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2045 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2046 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2047 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2048 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2049 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2050 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2051 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2052 } 2053 #ifdef ENABLE_CLASSIC 2054 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2055 if (packet[5] == 0){ 2056 hci_stack->synchronous_flow_control_enabled = 1; 2057 } 2058 } 2059 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2060 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2061 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2062 conn = hci_connection_for_handle(handle); 2063 if (!conn) break; 2064 if (status == 0){ 2065 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2066 log_info("Handle %x04x key Size: %u", handle, key_size); 2067 conn->encryption_key_size = key_size; 2068 } else { 2069 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2070 conn->encryption_key_size = 1; 2071 } 2072 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2073 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2074 } 2075 #endif 2076 break; 2077 2078 case HCI_EVENT_COMMAND_STATUS: 2079 // get num cmd packets - limit to 1 to reduce complexity 2080 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2081 2082 // check command status to detected failed outgoing connections 2083 create_connection_cmd = 0; 2084 #ifdef ENABLE_CLASSIC 2085 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2086 create_connection_cmd = 1; 2087 } 2088 #endif 2089 #ifdef ENABLE_LE_CENTRAL 2090 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2091 create_connection_cmd = 1; 2092 } 2093 #endif 2094 if (create_connection_cmd) { 2095 uint8_t status = hci_event_command_status_get_status(packet); 2096 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2097 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); 2098 2099 // reset outgoing address info 2100 memset(hci_stack->outgoing_addr, 0, 6); 2101 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2102 2103 // error => outgoing connection failed 2104 if ((conn != NULL) && (status != 0)){ 2105 hci_handle_connection_failed(conn, status); 2106 } 2107 } 2108 break; 2109 2110 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2111 if (size < 3) return; 2112 uint16_t num_handles = packet[2]; 2113 if (size != (3 + num_handles * 4)) return; 2114 uint16_t offset = 3; 2115 for (i=0; i<num_handles;i++){ 2116 handle = little_endian_read_16(packet, offset) & 0x0fff; 2117 offset += 2; 2118 uint16_t num_packets = little_endian_read_16(packet, offset); 2119 offset += 2; 2120 2121 conn = hci_connection_for_handle(handle); 2122 if (!conn){ 2123 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2124 continue; 2125 } 2126 2127 if (conn->num_packets_sent >= num_packets){ 2128 conn->num_packets_sent -= num_packets; 2129 } else { 2130 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2131 conn->num_packets_sent = 0; 2132 } 2133 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2134 2135 #ifdef ENABLE_CLASSIC 2136 // For SCO, we do the can_send_now_check here 2137 hci_notify_if_sco_can_send_now(); 2138 #endif 2139 } 2140 break; 2141 } 2142 2143 #ifdef ENABLE_CLASSIC 2144 case HCI_EVENT_INQUIRY_COMPLETE: 2145 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2146 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2147 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2148 hci_emit_event(event, sizeof(event), 1); 2149 } 2150 break; 2151 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2152 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2153 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2154 } 2155 break; 2156 case HCI_EVENT_CONNECTION_REQUEST: 2157 reverse_bd_addr(&packet[2], addr); 2158 if (hci_stack->gap_classic_accept_callback != NULL){ 2159 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2160 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2161 bd_addr_copy(hci_stack->decline_addr, addr); 2162 break; 2163 } 2164 } 2165 2166 // TODO: eval COD 8-10 2167 link_type = packet[11]; 2168 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2169 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2170 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2171 if (!conn) { 2172 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2173 } 2174 if (!conn) { 2175 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2176 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2177 bd_addr_copy(hci_stack->decline_addr, addr); 2178 break; 2179 } 2180 conn->role = HCI_ROLE_SLAVE; 2181 conn->state = RECEIVED_CONNECTION_REQUEST; 2182 // store info about eSCO 2183 if (link_type == 0x02){ 2184 conn->remote_supported_feature_eSCO = 1; 2185 } 2186 hci_run(); 2187 break; 2188 2189 case HCI_EVENT_CONNECTION_COMPLETE: 2190 // Connection management 2191 reverse_bd_addr(&packet[5], addr); 2192 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2193 addr_type = BD_ADDR_TYPE_ACL; 2194 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2195 if (conn) { 2196 if (!packet[2]){ 2197 conn->state = OPEN; 2198 conn->con_handle = little_endian_read_16(packet, 3); 2199 2200 // queue get remote feature 2201 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2202 2203 // queue set supervision timeout if we're master 2204 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2205 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2206 } 2207 2208 // restart timer 2209 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2210 btstack_run_loop_add_timer(&conn->timeout); 2211 2212 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2213 2214 hci_emit_nr_connections_changed(); 2215 } else { 2216 // connection failed 2217 hci_handle_connection_failed(conn, packet[2]); 2218 } 2219 } 2220 break; 2221 2222 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2223 reverse_bd_addr(&packet[5], addr); 2224 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2225 if (packet[2]){ 2226 // connection failed 2227 break; 2228 } 2229 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2230 if (!conn) { 2231 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2232 } 2233 if (!conn) { 2234 break; 2235 } 2236 conn->state = OPEN; 2237 conn->con_handle = little_endian_read_16(packet, 3); 2238 2239 #ifdef ENABLE_SCO_OVER_HCI 2240 // update SCO 2241 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2242 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2243 } 2244 // trigger can send now 2245 if (hci_have_usb_transport()){ 2246 hci_stack->sco_can_send_now = 1; 2247 } 2248 #endif 2249 break; 2250 2251 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2252 handle = little_endian_read_16(packet, 3); 2253 conn = hci_connection_for_handle(handle); 2254 if (!conn) break; 2255 if (!packet[2]){ 2256 uint8_t * features = &packet[5]; 2257 if (features[6] & (1 << 3)){ 2258 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2259 } 2260 if (features[3] & (1<<7)){ 2261 conn->remote_supported_feature_eSCO = 1; 2262 } 2263 } 2264 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2265 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2266 if (conn->bonding_flags & BONDING_DEDICATED){ 2267 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2268 } 2269 break; 2270 2271 case HCI_EVENT_LINK_KEY_REQUEST: 2272 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2273 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2274 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2275 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2276 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2277 hci_run(); 2278 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2279 return; 2280 2281 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2282 reverse_bd_addr(&packet[2], addr); 2283 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2284 if (!conn) break; 2285 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2286 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2287 // Change Connection Encryption keeps link key type 2288 if (link_key_type != CHANGED_COMBINATION_KEY){ 2289 conn->link_key_type = link_key_type; 2290 } 2291 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2292 // still forward event to allow dismiss of pairing dialog 2293 break; 2294 } 2295 2296 case HCI_EVENT_PIN_CODE_REQUEST: 2297 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2298 // non-bondable mode: pin code negative reply will be sent 2299 if (!hci_stack->bondable){ 2300 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2301 hci_run(); 2302 return; 2303 } 2304 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2305 if (!hci_stack->link_key_db) break; 2306 hci_event_pin_code_request_get_bd_addr(packet, addr); 2307 hci_stack->link_key_db->delete_link_key(addr); 2308 break; 2309 2310 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2311 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2312 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2313 break; 2314 2315 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2316 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2317 if (!hci_stack->ssp_auto_accept) break; 2318 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2319 break; 2320 2321 case HCI_EVENT_USER_PASSKEY_REQUEST: 2322 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2323 if (!hci_stack->ssp_auto_accept) break; 2324 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2325 break; 2326 case HCI_EVENT_MODE_CHANGE: 2327 handle = hci_event_mode_change_get_handle(packet); 2328 conn = hci_connection_for_handle(handle); 2329 if (!conn) break; 2330 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2331 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2332 break; 2333 #endif 2334 2335 case HCI_EVENT_ENCRYPTION_CHANGE: 2336 handle = little_endian_read_16(packet, 3); 2337 conn = hci_connection_for_handle(handle); 2338 if (!conn) break; 2339 if (packet[2] == 0) { 2340 if (packet[5]){ 2341 if (hci_is_le_connection(conn)){ 2342 // For LE, we accept connection as encrypted 2343 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2344 } 2345 #ifdef ENABLE_CLASSIC 2346 else { 2347 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2348 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2349 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2350 } else { 2351 // if not, pretend everything is perfect 2352 conn->encryption_key_size = 16; 2353 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2354 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2355 } 2356 } 2357 #endif 2358 } else { 2359 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2360 } 2361 } 2362 2363 break; 2364 2365 #ifdef ENABLE_CLASSIC 2366 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2367 handle = little_endian_read_16(packet, 3); 2368 conn = hci_connection_for_handle(handle); 2369 if (!conn) break; 2370 2371 // dedicated bonding: send result and disconnect 2372 if (conn->bonding_flags & BONDING_DEDICATED){ 2373 conn->bonding_flags &= ~BONDING_DEDICATED; 2374 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2375 conn->bonding_status = packet[2]; 2376 break; 2377 } 2378 2379 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2380 // link key sufficient for requested security 2381 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2382 break; 2383 } 2384 // not enough 2385 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2386 break; 2387 #endif 2388 2389 // HCI_EVENT_DISCONNECTION_COMPLETE 2390 // has been split, to first notify stack before shutting connection down 2391 // see end of function, too. 2392 case HCI_EVENT_DISCONNECTION_COMPLETE: 2393 if (packet[2]) break; // status != 0 2394 handle = little_endian_read_16(packet, 3); 2395 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2396 if (hci_stack->acl_fragmentation_total_size > 0) { 2397 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2398 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2399 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2400 hci_stack->acl_fragmentation_total_size = 0; 2401 hci_stack->acl_fragmentation_pos = 0; 2402 if (release_buffer){ 2403 hci_release_packet_buffer(); 2404 } 2405 } 2406 } 2407 2408 // re-enable advertisements for le connections if active 2409 conn = hci_connection_for_handle(handle); 2410 if (!conn) break; 2411 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2412 #ifdef ENABLE_BLE 2413 #ifdef ENABLE_LE_PERIPHERAL 2414 if (hci_is_le_connection(conn)){ 2415 hci_reenable_advertisements_if_needed(); 2416 } 2417 #endif 2418 #endif 2419 break; 2420 2421 case HCI_EVENT_HARDWARE_ERROR: 2422 log_error("Hardware Error: 0x%02x", packet[2]); 2423 if (hci_stack->hardware_error_callback){ 2424 (*hci_stack->hardware_error_callback)(packet[2]); 2425 } else { 2426 // if no special requests, just reboot stack 2427 hci_power_control_off(); 2428 hci_power_control_on(); 2429 } 2430 break; 2431 2432 #ifdef ENABLE_CLASSIC 2433 case HCI_EVENT_ROLE_CHANGE: 2434 if (packet[2]) break; // status != 0 2435 reverse_bd_addr(&packet[3], addr); 2436 addr_type = BD_ADDR_TYPE_ACL; 2437 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2438 if (!conn) break; 2439 conn->role = packet[9]; 2440 break; 2441 #endif 2442 2443 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2444 // release packet buffer only for asynchronous transport and if there are not further fragements 2445 if (hci_transport_synchronous()) { 2446 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2447 return; // instead of break: to avoid re-entering hci_run() 2448 } 2449 hci_stack->acl_fragmentation_tx_active = 0; 2450 if (hci_stack->acl_fragmentation_total_size) break; 2451 hci_release_packet_buffer(); 2452 2453 // L2CAP receives this event via the hci_emit_event below 2454 2455 #ifdef ENABLE_CLASSIC 2456 // For SCO, we do the can_send_now_check here 2457 hci_notify_if_sco_can_send_now(); 2458 #endif 2459 break; 2460 2461 #ifdef ENABLE_CLASSIC 2462 case HCI_EVENT_SCO_CAN_SEND_NOW: 2463 // For SCO, we do the can_send_now_check here 2464 hci_stack->sco_can_send_now = 1; 2465 hci_notify_if_sco_can_send_now(); 2466 return; 2467 2468 // explode inquriy results for easier consumption 2469 case HCI_EVENT_INQUIRY_RESULT: 2470 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2471 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2472 gap_inquiry_explode(packet, size); 2473 break; 2474 #endif 2475 2476 #ifdef ENABLE_BLE 2477 case HCI_EVENT_LE_META: 2478 switch (packet[2]){ 2479 #ifdef ENABLE_LE_CENTRAL 2480 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2481 // log_info("advertising report received"); 2482 if (!hci_stack->le_scanning_enabled) break; 2483 le_handle_advertisement_report(packet, size); 2484 break; 2485 #endif 2486 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2487 // Connection management 2488 reverse_bd_addr(&packet[8], addr); 2489 addr_type = (bd_addr_type_t)packet[7]; 2490 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2491 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2492 2493 #ifdef ENABLE_LE_CENTRAL 2494 // if auto-connect, remove from whitelist in both roles 2495 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2496 hci_remove_from_whitelist(addr_type, addr); 2497 } 2498 // handle error: error is reported only to the initiator -> outgoing connection 2499 if (packet[3]){ 2500 2501 // handle cancelled outgoing connection 2502 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2503 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2504 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2505 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2506 conn = gap_get_outgoing_connection(); 2507 } 2508 2509 // outgoing connection establishment is done 2510 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2511 // remove entry 2512 if (conn){ 2513 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2514 btstack_memory_hci_connection_free( conn ); 2515 } 2516 break; 2517 } 2518 #endif 2519 // on success, both hosts receive connection complete event 2520 if (packet[6] == HCI_ROLE_MASTER){ 2521 #ifdef ENABLE_LE_CENTRAL 2522 // if we're master, it was an outgoing connection and we're done with it 2523 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2524 #endif 2525 } else { 2526 #ifdef ENABLE_LE_PERIPHERAL 2527 // if we're slave, it was an incoming connection, advertisements have stopped 2528 hci_stack->le_advertisements_active = 0; 2529 #endif 2530 } 2531 // LE connections are auto-accepted, so just create a connection if there isn't one already 2532 if (!conn){ 2533 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2534 } 2535 // no memory, sorry. 2536 if (!conn){ 2537 break; 2538 } 2539 2540 conn->state = OPEN; 2541 conn->role = packet[6]; 2542 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2543 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2544 2545 #ifdef ENABLE_LE_PERIPHERAL 2546 if (packet[6] == HCI_ROLE_SLAVE){ 2547 hci_reenable_advertisements_if_needed(); 2548 } 2549 #endif 2550 2551 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2552 2553 // restart timer 2554 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2555 // btstack_run_loop_add_timer(&conn->timeout); 2556 2557 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2558 2559 hci_emit_nr_connections_changed(); 2560 break; 2561 2562 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2563 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2564 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2565 conn = hci_connection_for_handle(handle); 2566 if (!conn) break; 2567 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2568 break; 2569 2570 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2571 // connection 2572 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2573 conn = hci_connection_for_handle(handle); 2574 if (conn) { 2575 // read arguments 2576 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2577 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2578 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2579 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2580 2581 // validate against current connection parameter range 2582 le_connection_parameter_range_t existing_range; 2583 gap_get_connection_parameter_range(&existing_range); 2584 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2585 if (update_parameter){ 2586 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2587 conn->le_conn_interval_min = le_conn_interval_min; 2588 conn->le_conn_interval_max = le_conn_interval_max; 2589 conn->le_conn_latency = le_conn_latency; 2590 conn->le_supervision_timeout = le_supervision_timeout; 2591 } else { 2592 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2593 } 2594 } 2595 break; 2596 default: 2597 break; 2598 } 2599 break; 2600 #endif 2601 case HCI_EVENT_VENDOR_SPECIFIC: 2602 // Vendor specific commands often create vendor specific event instead of num completed packets 2603 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2604 switch (hci_stack->manufacturer){ 2605 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2606 hci_stack->num_cmd_packets = 1; 2607 break; 2608 default: 2609 break; 2610 } 2611 break; 2612 default: 2613 break; 2614 } 2615 2616 handle_event_for_current_stack_state(packet, size); 2617 2618 // notify upper stack 2619 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2620 2621 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2622 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2623 if (!packet[2]){ 2624 handle = little_endian_read_16(packet, 3); 2625 hci_connection_t * aConn = hci_connection_for_handle(handle); 2626 if (aConn) { 2627 uint8_t status = aConn->bonding_status; 2628 uint16_t flags = aConn->bonding_flags; 2629 bd_addr_t bd_address; 2630 (void)memcpy(&bd_address, aConn->address, 6); 2631 // only discard connection if app did not trigger a reconnect 2632 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2633 hci_shutdown_connection(aConn); 2634 } 2635 // connection struct might be gone, don't access anymore 2636 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2637 hci_emit_dedicated_bonding_result(bd_address, status); 2638 } 2639 } 2640 } 2641 } 2642 2643 // execute main loop 2644 hci_run(); 2645 } 2646 2647 #ifdef ENABLE_CLASSIC 2648 2649 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2650 static void sco_schedule_tx(hci_connection_t * conn); 2651 2652 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2653 log_debug("SCO TX Timeout"); 2654 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2655 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2656 if (!conn) return; 2657 2658 // trigger send 2659 conn->sco_tx_ready = 1; 2660 // extra packet if CVSD but SCO buffer is too short 2661 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2662 conn->sco_tx_ready++; 2663 } 2664 hci_notify_if_sco_can_send_now(); 2665 } 2666 2667 2668 #define SCO_TX_AFTER_RX_MS (6) 2669 2670 static void sco_schedule_tx(hci_connection_t * conn){ 2671 2672 uint32_t now = btstack_run_loop_get_time_ms(); 2673 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2674 int time_delta_ms = sco_tx_ms - now; 2675 2676 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2677 2678 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2679 btstack_run_loop_set_timer(timer, time_delta_ms); 2680 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2681 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2682 btstack_run_loop_add_timer(timer); 2683 } 2684 2685 static void sco_handler(uint8_t * packet, uint16_t size){ 2686 // lookup connection struct 2687 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2688 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2689 if (!conn) return; 2690 2691 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2692 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2693 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2694 packet[2] = 0x3c; 2695 memmove(&packet[3], &packet[23], 63); 2696 size = 63; 2697 } 2698 } 2699 2700 if (hci_have_usb_transport()){ 2701 // Nothing to do 2702 } else { 2703 // 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); 2704 if (hci_stack->synchronous_flow_control_enabled == 0){ 2705 uint32_t now = btstack_run_loop_get_time_ms(); 2706 2707 if (!conn->sco_rx_valid){ 2708 // ignore first 10 packets 2709 conn->sco_rx_count++; 2710 // log_debug("sco rx count %u", conn->sco_rx_count); 2711 if (conn->sco_rx_count == 10) { 2712 // use first timestamp as is and pretent it just started 2713 conn->sco_rx_ms = now; 2714 conn->sco_rx_valid = 1; 2715 conn->sco_rx_count = 0; 2716 sco_schedule_tx(conn); 2717 } 2718 } else { 2719 // track expected arrival timme 2720 conn->sco_rx_count++; 2721 conn->sco_rx_ms += 7; 2722 int delta = (int32_t) (now - conn->sco_rx_ms); 2723 if (delta > 0){ 2724 conn->sco_rx_ms++; 2725 } 2726 // log_debug("sco rx %u", conn->sco_rx_ms); 2727 sco_schedule_tx(conn); 2728 } 2729 } 2730 } 2731 // deliver to app 2732 if (hci_stack->sco_packet_handler) { 2733 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2734 } 2735 2736 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2737 conn->num_packets_completed++; 2738 hci_stack->host_completed_packets = 1; 2739 hci_run(); 2740 #endif 2741 } 2742 #endif 2743 2744 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2745 hci_dump_packet(packet_type, 1, packet, size); 2746 switch (packet_type) { 2747 case HCI_EVENT_PACKET: 2748 event_handler(packet, size); 2749 break; 2750 case HCI_ACL_DATA_PACKET: 2751 acl_handler(packet, size); 2752 break; 2753 #ifdef ENABLE_CLASSIC 2754 case HCI_SCO_DATA_PACKET: 2755 sco_handler(packet, size); 2756 break; 2757 #endif 2758 default: 2759 break; 2760 } 2761 } 2762 2763 /** 2764 * @brief Add event packet handler. 2765 */ 2766 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2767 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2768 } 2769 2770 2771 /** Register HCI packet handlers */ 2772 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2773 hci_stack->acl_packet_handler = handler; 2774 } 2775 2776 #ifdef ENABLE_CLASSIC 2777 /** 2778 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2779 */ 2780 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2781 hci_stack->sco_packet_handler = handler; 2782 } 2783 #endif 2784 2785 static void hci_state_reset(void){ 2786 // no connections yet 2787 hci_stack->connections = NULL; 2788 2789 // keep discoverable/connectable as this has been requested by the client(s) 2790 // hci_stack->discoverable = 0; 2791 // hci_stack->connectable = 0; 2792 // hci_stack->bondable = 1; 2793 // hci_stack->own_addr_type = 0; 2794 2795 // buffer is free 2796 hci_stack->hci_packet_buffer_reserved = 0; 2797 2798 // no pending cmds 2799 hci_stack->decline_reason = 0; 2800 hci_stack->new_scan_enable_value = 0xff; 2801 2802 // LE 2803 #ifdef ENABLE_BLE 2804 memset(hci_stack->le_random_address, 0, 6); 2805 hci_stack->le_random_address_set = 0; 2806 #endif 2807 #ifdef ENABLE_LE_CENTRAL 2808 hci_stack->le_scanning_active = 0; 2809 hci_stack->le_scan_type = 0xff; 2810 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2811 hci_stack->le_whitelist = 0; 2812 hci_stack->le_whitelist_capacity = 0; 2813 #endif 2814 } 2815 2816 #ifdef ENABLE_CLASSIC 2817 /** 2818 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2819 */ 2820 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2821 // store and open remote device db 2822 hci_stack->link_key_db = link_key_db; 2823 if (hci_stack->link_key_db) { 2824 hci_stack->link_key_db->open(); 2825 } 2826 } 2827 #endif 2828 2829 void hci_init(const hci_transport_t *transport, const void *config){ 2830 2831 #ifdef HAVE_MALLOC 2832 if (!hci_stack) { 2833 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2834 } 2835 #else 2836 hci_stack = &hci_stack_static; 2837 #endif 2838 memset(hci_stack, 0, sizeof(hci_stack_t)); 2839 2840 // reference to use transport layer implementation 2841 hci_stack->hci_transport = transport; 2842 2843 // reference to used config 2844 hci_stack->config = config; 2845 2846 // setup pointer for outgoing packet buffer 2847 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2848 2849 // max acl payload size defined in config.h 2850 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2851 2852 // register packet handlers with transport 2853 transport->register_packet_handler(&packet_handler); 2854 2855 hci_stack->state = HCI_STATE_OFF; 2856 2857 // class of device 2858 hci_stack->class_of_device = 0x007a020c; // Smartphone 2859 2860 // bondable by default 2861 hci_stack->bondable = 1; 2862 2863 #ifdef ENABLE_CLASSIC 2864 // classic name 2865 hci_stack->local_name = default_classic_name; 2866 2867 // Master slave policy 2868 hci_stack->master_slave_policy = 1; 2869 2870 // Allow Role Switch 2871 hci_stack->allow_role_switch = 1; 2872 2873 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2874 hci_stack->gap_required_encyrption_key_size = 16; 2875 #endif 2876 2877 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2878 hci_stack->ssp_enable = 1; 2879 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2880 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2881 hci_stack->ssp_auto_accept = 1; 2882 2883 // voice setting - signed 16 bit pcm data with CVSD over the air 2884 hci_stack->sco_voice_setting = 0x60; 2885 2886 #ifdef ENABLE_LE_CENTRAL 2887 // connection parameter to use for outgoing connections 2888 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2889 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2890 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2891 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2892 hci_stack->le_connection_latency = 4; // 4 2893 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2894 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2895 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2896 2897 // default LE Scanning 2898 hci_stack->le_scan_interval = 0x1e0; 2899 hci_stack->le_scan_window = 0x30; 2900 #endif 2901 2902 #ifdef ENABLE_LE_PERIPHERAL 2903 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2904 #endif 2905 2906 // connection parameter range used to answer connection parameter update requests in l2cap 2907 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2908 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2909 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2910 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2911 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2912 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2913 2914 hci_state_reset(); 2915 } 2916 2917 /** 2918 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2919 */ 2920 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2921 hci_stack->chipset = chipset_driver; 2922 2923 // reset chipset driver - init is also called on power_up 2924 if (hci_stack->chipset && hci_stack->chipset->init){ 2925 hci_stack->chipset->init(hci_stack->config); 2926 } 2927 } 2928 2929 /** 2930 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2931 */ 2932 void hci_set_control(const btstack_control_t *hardware_control){ 2933 // references to used control implementation 2934 hci_stack->control = hardware_control; 2935 // init with transport config 2936 hardware_control->init(hci_stack->config); 2937 } 2938 2939 void hci_close(void){ 2940 // close remote device db 2941 if (hci_stack->link_key_db) { 2942 hci_stack->link_key_db->close(); 2943 } 2944 2945 btstack_linked_list_iterator_t lit; 2946 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2947 while (btstack_linked_list_iterator_has_next(&lit)){ 2948 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2949 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2950 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2951 hci_shutdown_connection(connection); 2952 } 2953 2954 hci_power_control(HCI_POWER_OFF); 2955 2956 #ifdef HAVE_MALLOC 2957 free(hci_stack); 2958 #endif 2959 hci_stack = NULL; 2960 } 2961 2962 #ifdef ENABLE_CLASSIC 2963 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2964 // validate ranage and set 2965 if (encryption_key_size < 7) return; 2966 if (encryption_key_size > 16) return; 2967 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2968 } 2969 #endif 2970 2971 #ifdef ENABLE_CLASSIC 2972 void gap_set_class_of_device(uint32_t class_of_device){ 2973 hci_stack->class_of_device = class_of_device; 2974 } 2975 2976 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2977 hci_stack->default_link_policy_settings = default_link_policy_settings; 2978 } 2979 2980 void gap_set_allow_role_switch(bool allow_role_switch){ 2981 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 2982 } 2983 2984 uint8_t hci_get_allow_role_switch(void){ 2985 return hci_stack->allow_role_switch; 2986 } 2987 2988 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 2989 hci_stack->link_supervision_timeout = link_supervision_timeout; 2990 } 2991 2992 void hci_disable_l2cap_timeout_check(void){ 2993 disable_l2cap_timeouts = 1; 2994 } 2995 #endif 2996 2997 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2998 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2999 void hci_set_bd_addr(bd_addr_t addr){ 3000 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3001 hci_stack->custom_bd_addr_set = 1; 3002 } 3003 #endif 3004 3005 // State-Module-Driver overview 3006 // state module low-level 3007 // HCI_STATE_OFF off close 3008 // HCI_STATE_INITIALIZING, on open 3009 // HCI_STATE_WORKING, on open 3010 // HCI_STATE_HALTING, on open 3011 // HCI_STATE_SLEEPING, off/sleep close 3012 // HCI_STATE_FALLING_ASLEEP on open 3013 3014 static int hci_power_control_on(void){ 3015 3016 // power on 3017 int err = 0; 3018 if (hci_stack->control && hci_stack->control->on){ 3019 err = (*hci_stack->control->on)(); 3020 } 3021 if (err){ 3022 log_error( "POWER_ON failed"); 3023 hci_emit_hci_open_failed(); 3024 return err; 3025 } 3026 3027 // int chipset driver 3028 if (hci_stack->chipset && hci_stack->chipset->init){ 3029 hci_stack->chipset->init(hci_stack->config); 3030 } 3031 3032 // init transport 3033 if (hci_stack->hci_transport->init){ 3034 hci_stack->hci_transport->init(hci_stack->config); 3035 } 3036 3037 // open transport 3038 err = hci_stack->hci_transport->open(); 3039 if (err){ 3040 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3041 if (hci_stack->control && hci_stack->control->off){ 3042 (*hci_stack->control->off)(); 3043 } 3044 hci_emit_hci_open_failed(); 3045 return err; 3046 } 3047 return 0; 3048 } 3049 3050 static void hci_power_control_off(void){ 3051 3052 log_info("hci_power_control_off"); 3053 3054 // close low-level device 3055 hci_stack->hci_transport->close(); 3056 3057 log_info("hci_power_control_off - hci_transport closed"); 3058 3059 // power off 3060 if (hci_stack->control && hci_stack->control->off){ 3061 (*hci_stack->control->off)(); 3062 } 3063 3064 log_info("hci_power_control_off - control closed"); 3065 3066 hci_stack->state = HCI_STATE_OFF; 3067 } 3068 3069 static void hci_power_control_sleep(void){ 3070 3071 log_info("hci_power_control_sleep"); 3072 3073 #if 0 3074 // don't close serial port during sleep 3075 3076 // close low-level device 3077 hci_stack->hci_transport->close(hci_stack->config); 3078 #endif 3079 3080 // sleep mode 3081 if (hci_stack->control && hci_stack->control->sleep){ 3082 (*hci_stack->control->sleep)(); 3083 } 3084 3085 hci_stack->state = HCI_STATE_SLEEPING; 3086 } 3087 3088 static int hci_power_control_wake(void){ 3089 3090 log_info("hci_power_control_wake"); 3091 3092 // wake on 3093 if (hci_stack->control && hci_stack->control->wake){ 3094 (*hci_stack->control->wake)(); 3095 } 3096 3097 #if 0 3098 // open low-level device 3099 int err = hci_stack->hci_transport->open(hci_stack->config); 3100 if (err){ 3101 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3102 if (hci_stack->control && hci_stack->control->off){ 3103 (*hci_stack->control->off)(); 3104 } 3105 hci_emit_hci_open_failed(); 3106 return err; 3107 } 3108 #endif 3109 3110 return 0; 3111 } 3112 3113 static void hci_power_transition_to_initializing(void){ 3114 // set up state machine 3115 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3116 hci_stack->hci_packet_buffer_reserved = 0; 3117 hci_stack->state = HCI_STATE_INITIALIZING; 3118 hci_stack->substate = HCI_INIT_SEND_RESET; 3119 } 3120 3121 int hci_power_control(HCI_POWER_MODE power_mode){ 3122 3123 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3124 3125 int err = 0; 3126 switch (hci_stack->state){ 3127 3128 case HCI_STATE_OFF: 3129 switch (power_mode){ 3130 case HCI_POWER_ON: 3131 err = hci_power_control_on(); 3132 if (err) { 3133 log_error("hci_power_control_on() error %d", err); 3134 return err; 3135 } 3136 hci_power_transition_to_initializing(); 3137 break; 3138 case HCI_POWER_OFF: 3139 // do nothing 3140 break; 3141 case HCI_POWER_SLEEP: 3142 // do nothing (with SLEEP == OFF) 3143 break; 3144 } 3145 break; 3146 3147 case HCI_STATE_INITIALIZING: 3148 switch (power_mode){ 3149 case HCI_POWER_ON: 3150 // do nothing 3151 break; 3152 case HCI_POWER_OFF: 3153 // no connections yet, just turn it off 3154 hci_power_control_off(); 3155 break; 3156 case HCI_POWER_SLEEP: 3157 // no connections yet, just turn it off 3158 hci_power_control_sleep(); 3159 break; 3160 } 3161 break; 3162 3163 case HCI_STATE_WORKING: 3164 switch (power_mode){ 3165 case HCI_POWER_ON: 3166 // do nothing 3167 break; 3168 case HCI_POWER_OFF: 3169 // see hci_run 3170 hci_stack->state = HCI_STATE_HALTING; 3171 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3172 break; 3173 case HCI_POWER_SLEEP: 3174 // see hci_run 3175 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3176 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3177 break; 3178 } 3179 break; 3180 3181 case HCI_STATE_HALTING: 3182 switch (power_mode){ 3183 case HCI_POWER_ON: 3184 hci_power_transition_to_initializing(); 3185 break; 3186 case HCI_POWER_OFF: 3187 // do nothing 3188 break; 3189 case HCI_POWER_SLEEP: 3190 // see hci_run 3191 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3192 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3193 break; 3194 } 3195 break; 3196 3197 case HCI_STATE_FALLING_ASLEEP: 3198 switch (power_mode){ 3199 case HCI_POWER_ON: 3200 3201 #ifdef HAVE_PLATFORM_IPHONE_OS 3202 // nothing to do, if H4 supports power management 3203 if (btstack_control_iphone_power_management_enabled()){ 3204 hci_stack->state = HCI_STATE_INITIALIZING; 3205 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3206 break; 3207 } 3208 #endif 3209 hci_power_transition_to_initializing(); 3210 break; 3211 case HCI_POWER_OFF: 3212 // see hci_run 3213 hci_stack->state = HCI_STATE_HALTING; 3214 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3215 break; 3216 case HCI_POWER_SLEEP: 3217 // do nothing 3218 break; 3219 } 3220 break; 3221 3222 case HCI_STATE_SLEEPING: 3223 switch (power_mode){ 3224 case HCI_POWER_ON: 3225 3226 #ifdef HAVE_PLATFORM_IPHONE_OS 3227 // nothing to do, if H4 supports power management 3228 if (btstack_control_iphone_power_management_enabled()){ 3229 hci_stack->state = HCI_STATE_INITIALIZING; 3230 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3231 hci_update_scan_enable(); 3232 break; 3233 } 3234 #endif 3235 err = hci_power_control_wake(); 3236 if (err) return err; 3237 hci_power_transition_to_initializing(); 3238 break; 3239 case HCI_POWER_OFF: 3240 hci_stack->state = HCI_STATE_HALTING; 3241 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3242 break; 3243 case HCI_POWER_SLEEP: 3244 // do nothing 3245 break; 3246 } 3247 break; 3248 } 3249 3250 // create internal event 3251 hci_emit_state(); 3252 3253 // trigger next/first action 3254 hci_run(); 3255 3256 return 0; 3257 } 3258 3259 3260 #ifdef ENABLE_CLASSIC 3261 3262 static void hci_update_scan_enable(void){ 3263 // 2 = page scan, 1 = inq scan 3264 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3265 hci_run(); 3266 } 3267 3268 void gap_discoverable_control(uint8_t enable){ 3269 if (enable) enable = 1; // normalize argument 3270 3271 if (hci_stack->discoverable == enable){ 3272 hci_emit_discoverable_enabled(hci_stack->discoverable); 3273 return; 3274 } 3275 3276 hci_stack->discoverable = enable; 3277 hci_update_scan_enable(); 3278 } 3279 3280 void gap_connectable_control(uint8_t enable){ 3281 if (enable) enable = 1; // normalize argument 3282 3283 // don't emit event 3284 if (hci_stack->connectable == enable) return; 3285 3286 hci_stack->connectable = enable; 3287 hci_update_scan_enable(); 3288 } 3289 #endif 3290 3291 void gap_local_bd_addr(bd_addr_t address_buffer){ 3292 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3293 } 3294 3295 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3296 static void hci_host_num_completed_packets(void){ 3297 3298 // create packet manually as arrays are not supported and num_commands should not get reduced 3299 hci_reserve_packet_buffer(); 3300 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3301 3302 uint16_t size = 0; 3303 uint16_t num_handles = 0; 3304 packet[size++] = 0x35; 3305 packet[size++] = 0x0c; 3306 size++; // skip param len 3307 size++; // skip num handles 3308 3309 // add { handle, packets } entries 3310 btstack_linked_item_t * it; 3311 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3312 hci_connection_t * connection = (hci_connection_t *) it; 3313 if (connection->num_packets_completed){ 3314 little_endian_store_16(packet, size, connection->con_handle); 3315 size += 2; 3316 little_endian_store_16(packet, size, connection->num_packets_completed); 3317 size += 2; 3318 // 3319 num_handles++; 3320 connection->num_packets_completed = 0; 3321 } 3322 } 3323 3324 packet[2] = size - 3; 3325 packet[3] = num_handles; 3326 3327 hci_stack->host_completed_packets = 0; 3328 3329 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3330 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3331 3332 // release packet buffer for synchronous transport implementations 3333 if (hci_transport_synchronous()){ 3334 hci_release_packet_buffer(); 3335 hci_emit_transport_packet_sent(); 3336 } 3337 } 3338 #endif 3339 3340 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3341 UNUSED(ds); 3342 hci_stack->substate = HCI_HALTING_CLOSE; 3343 // allow packet handlers to defer final shutdown 3344 hci_emit_state(); 3345 hci_run(); 3346 } 3347 3348 static bool hci_run_acl_fragments(void){ 3349 if (hci_stack->acl_fragmentation_total_size > 0) { 3350 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3351 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3352 if (connection) { 3353 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3354 hci_send_acl_packet_fragments(connection); 3355 return true; 3356 } 3357 } else { 3358 // connection gone -> discard further fragments 3359 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3360 hci_stack->acl_fragmentation_total_size = 0; 3361 hci_stack->acl_fragmentation_pos = 0; 3362 } 3363 } 3364 return false; 3365 } 3366 3367 #ifdef ENABLE_CLASSIC 3368 static bool hci_run_general_gap_classic(void){ 3369 3370 // decline incoming connections 3371 if (hci_stack->decline_reason){ 3372 uint8_t reason = hci_stack->decline_reason; 3373 hci_stack->decline_reason = 0; 3374 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3375 return true; 3376 } 3377 // send scan enable 3378 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3379 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3380 hci_stack->new_scan_enable_value = 0xff; 3381 return true; 3382 } 3383 // start/stop inquiry 3384 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3385 uint8_t duration = hci_stack->inquiry_state; 3386 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3387 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3388 return true; 3389 } 3390 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3391 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3392 hci_send_cmd(&hci_inquiry_cancel); 3393 return true; 3394 } 3395 // remote name request 3396 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3397 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3398 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3399 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3400 return true; 3401 } 3402 // pairing 3403 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3404 uint8_t state = hci_stack->gap_pairing_state; 3405 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3406 switch (state){ 3407 case GAP_PAIRING_STATE_SEND_PIN: 3408 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); 3409 break; 3410 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3411 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3412 break; 3413 case GAP_PAIRING_STATE_SEND_PASSKEY: 3414 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3415 break; 3416 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3417 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3418 break; 3419 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3420 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3421 break; 3422 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3423 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3424 break; 3425 default: 3426 break; 3427 } 3428 return true; 3429 } 3430 return false; 3431 } 3432 #endif 3433 3434 #ifdef ENABLE_BLE 3435 static bool hci_run_general_gap_le(void){ 3436 3437 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3438 3439 if (hci_stack->state != HCI_STATE_WORKING) return false; 3440 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3441 3442 #ifdef ENABLE_LE_CENTRAL 3443 // parameter change requires scanning to be stopped first 3444 if (hci_stack->le_scan_type != 0xff) { 3445 if (hci_stack->le_scanning_active){ 3446 hci_stack->le_scanning_active = 0; 3447 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3448 } else { 3449 int scan_type = (int) hci_stack->le_scan_type; 3450 hci_stack->le_scan_type = 0xff; 3451 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); 3452 } 3453 return true; 3454 } 3455 // finally, we can enable/disable le scan 3456 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3457 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3458 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3459 return true; 3460 } 3461 #endif 3462 #ifdef ENABLE_LE_PERIPHERAL 3463 // le advertisement control 3464 if (hci_stack->le_advertisements_todo){ 3465 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3466 } 3467 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3468 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3469 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3470 return true; 3471 } 3472 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3473 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3474 hci_send_cmd(&hci_le_set_advertising_parameters, 3475 hci_stack->le_advertisements_interval_min, 3476 hci_stack->le_advertisements_interval_max, 3477 hci_stack->le_advertisements_type, 3478 hci_stack->le_own_addr_type, 3479 hci_stack->le_advertisements_direct_address_type, 3480 hci_stack->le_advertisements_direct_address, 3481 hci_stack->le_advertisements_channel_map, 3482 hci_stack->le_advertisements_filter_policy); 3483 return true; 3484 } 3485 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3486 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3487 uint8_t adv_data_clean[31]; 3488 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3489 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3490 hci_stack->le_advertisements_data_len); 3491 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3492 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3493 return true; 3494 } 3495 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3496 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3497 uint8_t scan_data_clean[31]; 3498 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3499 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3500 hci_stack->le_scan_response_data_len); 3501 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3502 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3503 return true; 3504 } 3505 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3506 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3507 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3508 return true; 3509 } 3510 #endif 3511 3512 #ifdef ENABLE_LE_CENTRAL 3513 // 3514 // LE Whitelist Management 3515 // 3516 3517 // check if whitelist needs modification 3518 btstack_linked_list_iterator_t lit; 3519 int modification_pending = 0; 3520 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3521 while (btstack_linked_list_iterator_has_next(&lit)){ 3522 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3523 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3524 modification_pending = 1; 3525 break; 3526 } 3527 } 3528 3529 if (modification_pending){ 3530 // stop connnecting if modification pending 3531 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3532 hci_send_cmd(&hci_le_create_connection_cancel); 3533 return true; 3534 } 3535 3536 // add/remove entries 3537 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3538 while (btstack_linked_list_iterator_has_next(&lit)){ 3539 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3540 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3541 entry->state = LE_WHITELIST_ON_CONTROLLER; 3542 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3543 return true; 3544 } 3545 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3546 bd_addr_t address; 3547 bd_addr_type_t address_type = entry->address_type; 3548 (void)memcpy(address, entry->address, 6); 3549 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3550 btstack_memory_whitelist_entry_free(entry); 3551 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3552 return true; 3553 } 3554 } 3555 } 3556 3557 // start connecting 3558 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3559 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3560 bd_addr_t null_addr; 3561 memset(null_addr, 0, 6); 3562 hci_send_cmd(&hci_le_create_connection, 3563 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3564 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3565 1, // use whitelist 3566 0, // peer address type 3567 null_addr, // peer bd addr 3568 hci_stack->le_own_addr_type, // our addr type: 3569 hci_stack->le_connection_interval_min, // conn interval min 3570 hci_stack->le_connection_interval_max, // conn interval max 3571 hci_stack->le_connection_latency, // conn latency 3572 hci_stack->le_supervision_timeout, // conn latency 3573 hci_stack->le_minimum_ce_length, // min ce length 3574 hci_stack->le_maximum_ce_length // max ce length 3575 ); 3576 return true; 3577 } 3578 #endif 3579 return false; 3580 } 3581 #endif 3582 3583 static bool hci_run_general_pending_commmands(void){ 3584 btstack_linked_item_t * it; 3585 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3586 hci_connection_t * connection = (hci_connection_t *) it; 3587 3588 switch(connection->state){ 3589 case SEND_CREATE_CONNECTION: 3590 switch(connection->address_type){ 3591 #ifdef ENABLE_CLASSIC 3592 case BD_ADDR_TYPE_ACL: 3593 log_info("sending hci_create_connection"); 3594 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3595 break; 3596 #endif 3597 default: 3598 #ifdef ENABLE_BLE 3599 #ifdef ENABLE_LE_CENTRAL 3600 // track outgoing connection 3601 hci_stack->outgoing_addr_type = connection->address_type; 3602 (void)memcpy(hci_stack->outgoing_addr, 3603 connection->address, 6); 3604 log_info("sending hci_le_create_connection"); 3605 hci_send_cmd(&hci_le_create_connection, 3606 hci_stack->le_connection_scan_interval, // conn scan interval 3607 hci_stack->le_connection_scan_window, // conn scan windows 3608 0, // don't use whitelist 3609 connection->address_type, // peer address type 3610 connection->address, // peer bd addr 3611 hci_stack->le_own_addr_type, // our addr type: 3612 hci_stack->le_connection_interval_min, // conn interval min 3613 hci_stack->le_connection_interval_max, // conn interval max 3614 hci_stack->le_connection_latency, // conn latency 3615 hci_stack->le_supervision_timeout, // conn latency 3616 hci_stack->le_minimum_ce_length, // min ce length 3617 hci_stack->le_maximum_ce_length // max ce length 3618 ); 3619 connection->state = SENT_CREATE_CONNECTION; 3620 #endif 3621 #endif 3622 break; 3623 } 3624 return true; 3625 3626 #ifdef ENABLE_CLASSIC 3627 case RECEIVED_CONNECTION_REQUEST: 3628 connection->role = HCI_ROLE_SLAVE; 3629 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3630 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3631 connection->state = ACCEPTED_CONNECTION_REQUEST; 3632 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3633 } 3634 return true; 3635 #endif 3636 3637 #ifdef ENABLE_BLE 3638 #ifdef ENABLE_LE_CENTRAL 3639 case SEND_CANCEL_CONNECTION: 3640 connection->state = SENT_CANCEL_CONNECTION; 3641 hci_send_cmd(&hci_le_create_connection_cancel); 3642 return true; 3643 #endif 3644 #endif 3645 case SEND_DISCONNECT: 3646 connection->state = SENT_DISCONNECT; 3647 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3648 return true; 3649 3650 default: 3651 break; 3652 } 3653 3654 // no further commands if connection is about to get shut down 3655 if (connection->state == SENT_DISCONNECT) continue; 3656 3657 if (connection->authentication_flags & READ_RSSI){ 3658 connectionClearAuthenticationFlags(connection, READ_RSSI); 3659 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3660 return true; 3661 } 3662 3663 #ifdef ENABLE_CLASSIC 3664 3665 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3666 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3667 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3668 return true; 3669 } 3670 3671 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3672 log_info("responding to link key request"); 3673 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3674 link_key_t link_key; 3675 link_key_type_t link_key_type; 3676 if ( hci_stack->link_key_db 3677 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3678 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3679 connection->link_key_type = link_key_type; 3680 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3681 } else { 3682 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3683 } 3684 return true; 3685 } 3686 3687 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3688 log_info("denying to pin request"); 3689 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3690 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3691 return true; 3692 } 3693 3694 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3695 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3696 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3697 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3698 // tweak authentication requirements 3699 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3700 if (connection->bonding_flags & BONDING_DEDICATED){ 3701 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3702 } 3703 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3704 authreq |= 1; 3705 } 3706 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3707 } else { 3708 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3709 } 3710 return true; 3711 } 3712 3713 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3714 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3715 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3716 return true; 3717 } 3718 3719 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3720 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3721 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3722 return true; 3723 } 3724 3725 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3726 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3727 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3728 return true; 3729 } 3730 3731 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3732 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3733 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3734 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3735 return true; 3736 } 3737 3738 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3739 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3740 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3741 return true; 3742 } 3743 3744 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3745 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3746 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3747 return true; 3748 } 3749 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3750 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3751 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3752 return true; 3753 } 3754 #endif 3755 3756 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3757 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3758 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3759 return true; 3760 } 3761 3762 #ifdef ENABLE_CLASSIC 3763 uint16_t sniff_min_interval; 3764 switch (connection->sniff_min_interval){ 3765 case 0: 3766 break; 3767 case 0xffff: 3768 connection->sniff_min_interval = 0; 3769 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3770 return true; 3771 default: 3772 sniff_min_interval = connection->sniff_min_interval; 3773 connection->sniff_min_interval = 0; 3774 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3775 return true; 3776 } 3777 #endif 3778 3779 #ifdef ENABLE_BLE 3780 switch (connection->le_con_parameter_update_state){ 3781 // response to L2CAP CON PARAMETER UPDATE REQUEST 3782 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3783 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3784 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3785 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3786 0x0000, 0xffff); 3787 return true; 3788 case CON_PARAMETER_UPDATE_REPLY: 3789 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3790 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3791 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3792 0x0000, 0xffff); 3793 return true; 3794 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3795 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3796 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3797 return true; 3798 default: 3799 break; 3800 } 3801 if (connection->le_phy_update_all_phys != 0xff){ 3802 uint8_t all_phys = connection->le_phy_update_all_phys; 3803 connection->le_phy_update_all_phys = 0xff; 3804 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); 3805 return true; 3806 } 3807 #endif 3808 } 3809 return false; 3810 } 3811 3812 static void hci_run(void){ 3813 3814 bool done; 3815 3816 // send continuation fragments first, as they block the prepared packet buffer 3817 done = hci_run_acl_fragments(); 3818 if (done) return; 3819 3820 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3821 // send host num completed packets next as they don't require num_cmd_packets > 0 3822 if (!hci_can_send_comand_packet_transport()) return; 3823 if (hci_stack->host_completed_packets){ 3824 hci_host_num_completed_packets(); 3825 return; 3826 } 3827 #endif 3828 3829 if (!hci_can_send_command_packet_now()) return; 3830 3831 // global/non-connection oriented commands 3832 3833 3834 #ifdef ENABLE_CLASSIC 3835 // general gap classic 3836 done = hci_run_general_gap_classic(); 3837 if (done) return; 3838 #endif 3839 3840 #ifdef ENABLE_BLE 3841 // general gap le 3842 done = hci_run_general_gap_le(); 3843 if (done) return; 3844 #endif 3845 3846 // send pending HCI commands 3847 done = hci_run_general_pending_commmands(); 3848 if (done) return; 3849 3850 // stack state sub statemachines 3851 hci_connection_t * connection; 3852 switch (hci_stack->state){ 3853 case HCI_STATE_INITIALIZING: 3854 hci_initializing_run(); 3855 break; 3856 3857 case HCI_STATE_HALTING: 3858 3859 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3860 switch (hci_stack->substate){ 3861 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3862 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3863 3864 #ifdef ENABLE_BLE 3865 #ifdef ENABLE_LE_CENTRAL 3866 // free whitelist entries 3867 { 3868 btstack_linked_list_iterator_t lit; 3869 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3870 while (btstack_linked_list_iterator_has_next(&lit)){ 3871 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3872 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3873 btstack_memory_whitelist_entry_free(entry); 3874 } 3875 } 3876 #endif 3877 #endif 3878 // close all open connections 3879 connection = (hci_connection_t *) hci_stack->connections; 3880 if (connection){ 3881 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3882 if (!hci_can_send_command_packet_now()) return; 3883 3884 // check state 3885 if (connection->state == SENT_DISCONNECT) return; 3886 connection->state = SENT_DISCONNECT; 3887 3888 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3889 3890 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3891 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3892 3893 // ... which would be ignored anyway as we shutdown (free) the connection now 3894 hci_shutdown_connection(connection); 3895 3896 // finally, send the disconnect command 3897 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3898 return; 3899 } 3900 3901 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3902 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3903 log_info("HCI_STATE_HALTING: wait 50 ms"); 3904 hci_stack->substate = HCI_HALTING_W4_TIMER; 3905 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3906 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3907 btstack_run_loop_add_timer(&hci_stack->timeout); 3908 break; 3909 } 3910 3911 /* fall through */ 3912 3913 case HCI_HALTING_CLOSE: 3914 log_info("HCI_STATE_HALTING, calling off"); 3915 3916 // switch mode 3917 hci_power_control_off(); 3918 3919 log_info("HCI_STATE_HALTING, emitting state"); 3920 hci_emit_state(); 3921 log_info("HCI_STATE_HALTING, done"); 3922 break; 3923 3924 case HCI_HALTING_W4_TIMER: 3925 // keep waiting 3926 3927 break; 3928 default: 3929 break; 3930 } 3931 3932 break; 3933 3934 case HCI_STATE_FALLING_ASLEEP: 3935 switch(hci_stack->substate) { 3936 case HCI_FALLING_ASLEEP_DISCONNECT: 3937 log_info("HCI_STATE_FALLING_ASLEEP"); 3938 // close all open connections 3939 connection = (hci_connection_t *) hci_stack->connections; 3940 3941 #ifdef HAVE_PLATFORM_IPHONE_OS 3942 // don't close connections, if H4 supports power management 3943 if (btstack_control_iphone_power_management_enabled()){ 3944 connection = NULL; 3945 } 3946 #endif 3947 if (connection){ 3948 3949 // send disconnect 3950 if (!hci_can_send_command_packet_now()) return; 3951 3952 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3953 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3954 3955 // send disconnected event right away - causes higher layer connections to get closed, too. 3956 hci_shutdown_connection(connection); 3957 return; 3958 } 3959 3960 if (hci_classic_supported()){ 3961 // disable page and inquiry scan 3962 if (!hci_can_send_command_packet_now()) return; 3963 3964 log_info("HCI_STATE_HALTING, disabling inq scans"); 3965 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3966 3967 // continue in next sub state 3968 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3969 break; 3970 } 3971 3972 /* fall through */ 3973 3974 case HCI_FALLING_ASLEEP_COMPLETE: 3975 log_info("HCI_STATE_HALTING, calling sleep"); 3976 #ifdef HAVE_PLATFORM_IPHONE_OS 3977 // don't actually go to sleep, if H4 supports power management 3978 if (btstack_control_iphone_power_management_enabled()){ 3979 // SLEEP MODE reached 3980 hci_stack->state = HCI_STATE_SLEEPING; 3981 hci_emit_state(); 3982 break; 3983 } 3984 #endif 3985 // switch mode 3986 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3987 hci_emit_state(); 3988 break; 3989 3990 default: 3991 break; 3992 } 3993 break; 3994 3995 default: 3996 break; 3997 } 3998 } 3999 4000 int hci_send_cmd_packet(uint8_t *packet, int size){ 4001 // house-keeping 4002 4003 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4004 hci_stack->loopback_mode = packet[3]; 4005 } 4006 4007 #ifdef ENABLE_CLASSIC 4008 bd_addr_t addr; 4009 hci_connection_t * conn; 4010 4011 // create_connection? 4012 if (IS_COMMAND(packet, hci_create_connection)){ 4013 reverse_bd_addr(&packet[3], addr); 4014 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4015 4016 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4017 if (!conn){ 4018 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4019 if (!conn){ 4020 // notify client that alloc failed 4021 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4022 return -1; // packet not sent to controller 4023 } 4024 conn->state = SEND_CREATE_CONNECTION; 4025 } 4026 log_info("conn state %u", conn->state); 4027 switch (conn->state){ 4028 // if connection active exists 4029 case OPEN: 4030 // and OPEN, emit connection complete command 4031 hci_emit_connection_complete(addr, conn->con_handle, 0); 4032 return -1; // packet not sent to controller 4033 case SEND_CREATE_CONNECTION: 4034 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4035 break; 4036 default: 4037 // otherwise, just ignore as it is already in the open process 4038 return -1; // packet not sent to controller 4039 } 4040 conn->state = SENT_CREATE_CONNECTION; 4041 4042 // track outgoing connection 4043 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4044 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4045 } 4046 4047 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4048 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4049 } 4050 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4051 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4052 } 4053 4054 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4055 if (hci_stack->link_key_db){ 4056 reverse_bd_addr(&packet[3], addr); 4057 hci_stack->link_key_db->delete_link_key(addr); 4058 } 4059 } 4060 4061 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4062 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4063 reverse_bd_addr(&packet[3], addr); 4064 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4065 if (conn){ 4066 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4067 } 4068 } 4069 4070 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4071 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4072 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4073 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4074 reverse_bd_addr(&packet[3], addr); 4075 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4076 if (conn){ 4077 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4078 } 4079 } 4080 4081 #ifdef ENABLE_SCO_OVER_HCI 4082 // setup_synchronous_connection? Voice setting at offset 22 4083 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4084 // TODO: compare to current setting if sco connection already active 4085 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4086 } 4087 // accept_synchronus_connection? Voice setting at offset 18 4088 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4089 // TODO: compare to current setting if sco connection already active 4090 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4091 } 4092 #endif 4093 #endif 4094 4095 #ifdef ENABLE_BLE 4096 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4097 hci_stack->le_random_address_set = 1; 4098 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4099 } 4100 #ifdef ENABLE_LE_PERIPHERAL 4101 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4102 hci_stack->le_advertisements_active = packet[3]; 4103 } 4104 #endif 4105 #ifdef ENABLE_LE_CENTRAL 4106 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4107 // white list used? 4108 uint8_t initiator_filter_policy = packet[7]; 4109 switch (initiator_filter_policy){ 4110 case 0: 4111 // whitelist not used 4112 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4113 break; 4114 case 1: 4115 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4116 break; 4117 default: 4118 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4119 break; 4120 } 4121 } 4122 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4123 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4124 } 4125 #endif 4126 #endif 4127 4128 hci_stack->num_cmd_packets--; 4129 4130 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4131 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4132 } 4133 4134 // disconnect because of security block 4135 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4136 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4137 if (!connection) return; 4138 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4139 } 4140 4141 4142 // Configure Secure Simple Pairing 4143 4144 #ifdef ENABLE_CLASSIC 4145 4146 // enable will enable SSP during init 4147 void gap_ssp_set_enable(int enable){ 4148 hci_stack->ssp_enable = enable; 4149 } 4150 4151 static int hci_local_ssp_activated(void){ 4152 return gap_ssp_supported() && hci_stack->ssp_enable; 4153 } 4154 4155 // if set, BTstack will respond to io capability request using authentication requirement 4156 void gap_ssp_set_io_capability(int io_capability){ 4157 hci_stack->ssp_io_capability = io_capability; 4158 } 4159 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4160 hci_stack->ssp_authentication_requirement = authentication_requirement; 4161 } 4162 4163 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4164 void gap_ssp_set_auto_accept(int auto_accept){ 4165 hci_stack->ssp_auto_accept = auto_accept; 4166 } 4167 #endif 4168 4169 // va_list part of hci_send_cmd 4170 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4171 if (!hci_can_send_command_packet_now()){ 4172 log_error("hci_send_cmd called but cannot send packet now"); 4173 return 0; 4174 } 4175 4176 // for HCI INITIALIZATION 4177 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4178 hci_stack->last_cmd_opcode = cmd->opcode; 4179 4180 hci_reserve_packet_buffer(); 4181 uint8_t * packet = hci_stack->hci_packet_buffer; 4182 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4183 int err = hci_send_cmd_packet(packet, size); 4184 4185 // release packet buffer for synchronous transport implementations 4186 if (hci_transport_synchronous()){ 4187 hci_release_packet_buffer(); 4188 hci_emit_transport_packet_sent(); 4189 } 4190 4191 return err; 4192 } 4193 4194 /** 4195 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4196 */ 4197 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4198 va_list argptr; 4199 va_start(argptr, cmd); 4200 int res = hci_send_cmd_va_arg(cmd, argptr); 4201 va_end(argptr); 4202 return res; 4203 } 4204 4205 // Create various non-HCI events. 4206 // TODO: generalize, use table similar to hci_create_command 4207 4208 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4209 // dump packet 4210 if (dump) { 4211 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4212 } 4213 4214 // dispatch to all event handlers 4215 btstack_linked_list_iterator_t it; 4216 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4217 while (btstack_linked_list_iterator_has_next(&it)){ 4218 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4219 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4220 } 4221 } 4222 4223 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4224 if (!hci_stack->acl_packet_handler) return; 4225 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4226 } 4227 4228 #ifdef ENABLE_CLASSIC 4229 static void hci_notify_if_sco_can_send_now(void){ 4230 // notify SCO sender if waiting 4231 if (!hci_stack->sco_waiting_for_can_send_now) return; 4232 if (hci_can_send_sco_packet_now()){ 4233 hci_stack->sco_waiting_for_can_send_now = 0; 4234 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4235 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4236 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4237 } 4238 } 4239 4240 // parsing end emitting has been merged to reduce code size 4241 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4242 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4243 4244 uint8_t * eir_data; 4245 ad_context_t context; 4246 const uint8_t * name; 4247 uint8_t name_len; 4248 4249 if (size < 3) return; 4250 4251 int event_type = hci_event_packet_get_type(packet); 4252 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4253 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4254 4255 switch (event_type){ 4256 case HCI_EVENT_INQUIRY_RESULT: 4257 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4258 if (size != (3 + (num_responses * 14))) return; 4259 break; 4260 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4261 if (size != 257) return; 4262 if (num_responses != 1) return; 4263 break; 4264 default: 4265 return; 4266 } 4267 4268 // event[1] is set at the end 4269 int i; 4270 for (i=0; i<num_responses;i++){ 4271 memset(event, 0, sizeof(event)); 4272 event[0] = GAP_EVENT_INQUIRY_RESULT; 4273 uint8_t event_size = 18; // if name is not set by EIR 4274 4275 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4276 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4277 (void)memcpy(&event[9], 4278 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4279 3); // class of device 4280 (void)memcpy(&event[12], 4281 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4282 2); // clock offset 4283 4284 switch (event_type){ 4285 case HCI_EVENT_INQUIRY_RESULT: 4286 // 14,15,16,17 = 0, size 18 4287 break; 4288 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4289 event[14] = 1; 4290 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4291 // 16,17 = 0, size 18 4292 break; 4293 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4294 event[14] = 1; 4295 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4296 // for EIR packets, there is only one reponse in it 4297 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4298 name = NULL; 4299 // EIR data is 240 bytes in EIR event 4300 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4301 uint8_t data_type = ad_iterator_get_data_type(&context); 4302 uint8_t data_size = ad_iterator_get_data_len(&context); 4303 const uint8_t * data = ad_iterator_get_data(&context); 4304 // Prefer Complete Local Name over Shortend Local Name 4305 switch (data_type){ 4306 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4307 if (name) continue; 4308 /* fall through */ 4309 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4310 name = data; 4311 name_len = data_size; 4312 break; 4313 default: 4314 break; 4315 } 4316 } 4317 if (name){ 4318 event[16] = 1; 4319 // truncate name if needed 4320 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4321 event[17] = len; 4322 (void)memcpy(&event[18], name, len); 4323 event_size += len; 4324 } 4325 break; 4326 } 4327 event[1] = event_size - 2; 4328 hci_emit_event(event, event_size, 1); 4329 } 4330 } 4331 #endif 4332 4333 void hci_emit_state(void){ 4334 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4335 uint8_t event[3]; 4336 event[0] = BTSTACK_EVENT_STATE; 4337 event[1] = sizeof(event) - 2; 4338 event[2] = hci_stack->state; 4339 hci_emit_event(event, sizeof(event), 1); 4340 } 4341 4342 #ifdef ENABLE_CLASSIC 4343 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4344 uint8_t event[13]; 4345 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4346 event[1] = sizeof(event) - 2; 4347 event[2] = status; 4348 little_endian_store_16(event, 3, con_handle); 4349 reverse_bd_addr(address, &event[5]); 4350 event[11] = 1; // ACL connection 4351 event[12] = 0; // encryption disabled 4352 hci_emit_event(event, sizeof(event), 1); 4353 } 4354 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4355 if (disable_l2cap_timeouts) return; 4356 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4357 uint8_t event[4]; 4358 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4359 event[1] = sizeof(event) - 2; 4360 little_endian_store_16(event, 2, conn->con_handle); 4361 hci_emit_event(event, sizeof(event), 1); 4362 } 4363 #endif 4364 4365 #ifdef ENABLE_BLE 4366 #ifdef ENABLE_LE_CENTRAL 4367 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4368 uint8_t event[21]; 4369 event[0] = HCI_EVENT_LE_META; 4370 event[1] = sizeof(event) - 2; 4371 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4372 event[3] = status; 4373 little_endian_store_16(event, 4, con_handle); 4374 event[6] = 0; // TODO: role 4375 event[7] = address_type; 4376 reverse_bd_addr(address, &event[8]); 4377 little_endian_store_16(event, 14, 0); // interval 4378 little_endian_store_16(event, 16, 0); // latency 4379 little_endian_store_16(event, 18, 0); // supervision timeout 4380 event[20] = 0; // master clock accuracy 4381 hci_emit_event(event, sizeof(event), 1); 4382 } 4383 #endif 4384 #endif 4385 4386 static void hci_emit_transport_packet_sent(void){ 4387 // notify upper stack that it might be possible to send again 4388 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4389 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4390 } 4391 4392 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4393 uint8_t event[6]; 4394 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4395 event[1] = sizeof(event) - 2; 4396 event[2] = 0; // status = OK 4397 little_endian_store_16(event, 3, con_handle); 4398 event[5] = reason; 4399 hci_emit_event(event, sizeof(event), 1); 4400 } 4401 4402 static void hci_emit_nr_connections_changed(void){ 4403 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4404 uint8_t event[3]; 4405 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4406 event[1] = sizeof(event) - 2; 4407 event[2] = nr_hci_connections(); 4408 hci_emit_event(event, sizeof(event), 1); 4409 } 4410 4411 static void hci_emit_hci_open_failed(void){ 4412 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4413 uint8_t event[2]; 4414 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4415 event[1] = sizeof(event) - 2; 4416 hci_emit_event(event, sizeof(event), 1); 4417 } 4418 4419 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4420 log_info("hci_emit_dedicated_bonding_result %u ", status); 4421 uint8_t event[9]; 4422 int pos = 0; 4423 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4424 event[pos++] = sizeof(event) - 2; 4425 event[pos++] = status; 4426 reverse_bd_addr(address, &event[pos]); 4427 hci_emit_event(event, sizeof(event), 1); 4428 } 4429 4430 4431 #ifdef ENABLE_CLASSIC 4432 4433 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4434 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4435 uint8_t event[5]; 4436 int pos = 0; 4437 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4438 event[pos++] = sizeof(event) - 2; 4439 little_endian_store_16(event, 2, con_handle); 4440 pos += 2; 4441 event[pos++] = level; 4442 hci_emit_event(event, sizeof(event), 1); 4443 } 4444 4445 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4446 if (!connection) return LEVEL_0; 4447 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4448 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4449 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4450 // LEVEL 4 always requires 128 bit encrytion key size 4451 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4452 security_level = LEVEL_3; 4453 } 4454 return security_level; 4455 } 4456 4457 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4458 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4459 uint8_t event[3]; 4460 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4461 event[1] = sizeof(event) - 2; 4462 event[2] = enabled; 4463 hci_emit_event(event, sizeof(event), 1); 4464 } 4465 4466 // query if remote side supports eSCO 4467 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4468 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4469 if (!connection) return 0; 4470 return connection->remote_supported_feature_eSCO; 4471 } 4472 4473 // query if remote side supports SSP 4474 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4475 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4476 if (!connection) return 0; 4477 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4478 } 4479 4480 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4481 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4482 } 4483 4484 // GAP API 4485 /** 4486 * @bbrief enable/disable bonding. default is enabled 4487 * @praram enabled 4488 */ 4489 void gap_set_bondable_mode(int enable){ 4490 hci_stack->bondable = enable ? 1 : 0; 4491 } 4492 /** 4493 * @brief Get bondable mode. 4494 * @return 1 if bondable 4495 */ 4496 int gap_get_bondable_mode(void){ 4497 return hci_stack->bondable; 4498 } 4499 4500 /** 4501 * @brief map link keys to security levels 4502 */ 4503 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4504 switch (link_key_type){ 4505 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4506 return LEVEL_4; 4507 case COMBINATION_KEY: 4508 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4509 return LEVEL_3; 4510 default: 4511 return LEVEL_2; 4512 } 4513 } 4514 4515 /** 4516 * @brief map link keys to secure connection yes/no 4517 */ 4518 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4519 switch (link_key_type){ 4520 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4521 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4522 return 1; 4523 default: 4524 return 0; 4525 } 4526 } 4527 4528 /** 4529 * @brief map link keys to authenticated 4530 */ 4531 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4532 switch (link_key_type){ 4533 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4534 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4535 return 1; 4536 default: 4537 return 0; 4538 } 4539 } 4540 4541 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4542 log_info("gap_mitm_protection_required_for_security_level %u", level); 4543 return level > LEVEL_2; 4544 } 4545 4546 /** 4547 * @brief get current security level 4548 */ 4549 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4550 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4551 if (!connection) return LEVEL_0; 4552 return gap_security_level_for_connection(connection); 4553 } 4554 4555 /** 4556 * @brief request connection to device to 4557 * @result GAP_AUTHENTICATION_RESULT 4558 */ 4559 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4560 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4561 if (!connection){ 4562 hci_emit_security_level(con_handle, LEVEL_0); 4563 return; 4564 } 4565 gap_security_level_t current_level = gap_security_level(con_handle); 4566 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4567 requested_level, connection->requested_security_level, current_level); 4568 4569 // assumption: earlier requested security higher than current level => security request is active 4570 if (current_level < connection->requested_security_level){ 4571 if (connection->requested_security_level < requested_level){ 4572 // increase requested level as new level is higher 4573 4574 // TODO: handle re-authentication when done 4575 4576 connection->requested_security_level = requested_level; 4577 } 4578 return; 4579 } 4580 4581 // no request active, notify if security sufficient 4582 if (requested_level <= current_level){ 4583 hci_emit_security_level(con_handle, current_level); 4584 return; 4585 } 4586 4587 // start pairing to increase security level 4588 connection->requested_security_level = requested_level; 4589 4590 #if 0 4591 // sending encryption request without a link key results in an error. 4592 // TODO: figure out how to use it properly 4593 4594 // would enabling ecnryption suffice (>= LEVEL_2)? 4595 if (hci_stack->link_key_db){ 4596 link_key_type_t link_key_type; 4597 link_key_t link_key; 4598 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4599 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4600 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4601 return; 4602 } 4603 } 4604 } 4605 #endif 4606 4607 // start to authenticate connection 4608 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4609 hci_run(); 4610 } 4611 4612 /** 4613 * @brief start dedicated bonding with device. disconnect after bonding 4614 * @param device 4615 * @param request MITM protection 4616 * @result GAP_DEDICATED_BONDING_COMPLETE 4617 */ 4618 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4619 4620 // create connection state machine 4621 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4622 4623 if (!connection){ 4624 return BTSTACK_MEMORY_ALLOC_FAILED; 4625 } 4626 4627 // delete linkn key 4628 gap_drop_link_key_for_bd_addr(device); 4629 4630 // configure LEVEL_2/3, dedicated bonding 4631 connection->state = SEND_CREATE_CONNECTION; 4632 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4633 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4634 connection->bonding_flags = BONDING_DEDICATED; 4635 4636 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4637 4638 // handle: connnection failure (connection complete != ok) 4639 // handle: authentication failure 4640 // handle: disconnect on done 4641 4642 hci_run(); 4643 4644 return 0; 4645 } 4646 #endif 4647 4648 void gap_set_local_name(const char * local_name){ 4649 hci_stack->local_name = local_name; 4650 } 4651 4652 4653 #ifdef ENABLE_BLE 4654 4655 #ifdef ENABLE_LE_CENTRAL 4656 void gap_start_scan(void){ 4657 hci_stack->le_scanning_enabled = 1; 4658 hci_run(); 4659 } 4660 4661 void gap_stop_scan(void){ 4662 hci_stack->le_scanning_enabled = 0; 4663 hci_run(); 4664 } 4665 4666 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4667 hci_stack->le_scan_type = scan_type; 4668 hci_stack->le_scan_interval = scan_interval; 4669 hci_stack->le_scan_window = scan_window; 4670 hci_run(); 4671 } 4672 4673 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4674 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4675 if (!conn){ 4676 log_info("gap_connect: no connection exists yet, creating context"); 4677 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4678 if (!conn){ 4679 // notify client that alloc failed 4680 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4681 log_info("gap_connect: failed to alloc hci_connection_t"); 4682 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4683 } 4684 conn->state = SEND_CREATE_CONNECTION; 4685 log_info("gap_connect: send create connection next"); 4686 hci_run(); 4687 return ERROR_CODE_SUCCESS; 4688 } 4689 4690 if (!hci_is_le_connection(conn) || 4691 (conn->state == SEND_CREATE_CONNECTION) || 4692 (conn->state == SENT_CREATE_CONNECTION)) { 4693 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4694 log_error("gap_connect: classic connection or connect is already being created"); 4695 return GATT_CLIENT_IN_WRONG_STATE; 4696 } 4697 4698 // check if connection was just disconnected 4699 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4700 log_info("gap_connect: send create connection (again)"); 4701 conn->state = SEND_CREATE_CONNECTION; 4702 hci_run(); 4703 return ERROR_CODE_SUCCESS; 4704 } 4705 4706 log_info("gap_connect: context exists with state %u", conn->state); 4707 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4708 hci_run(); 4709 return ERROR_CODE_SUCCESS; 4710 } 4711 4712 // @assumption: only a single outgoing LE Connection exists 4713 static hci_connection_t * gap_get_outgoing_connection(void){ 4714 btstack_linked_item_t *it; 4715 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4716 hci_connection_t * conn = (hci_connection_t *) it; 4717 if (!hci_is_le_connection(conn)) continue; 4718 switch (conn->state){ 4719 case SEND_CREATE_CONNECTION: 4720 case SENT_CREATE_CONNECTION: 4721 case SENT_CANCEL_CONNECTION: 4722 return conn; 4723 default: 4724 break; 4725 }; 4726 } 4727 return NULL; 4728 } 4729 4730 uint8_t gap_connect_cancel(void){ 4731 hci_connection_t * conn = gap_get_outgoing_connection(); 4732 if (!conn) return 0; 4733 switch (conn->state){ 4734 case SEND_CREATE_CONNECTION: 4735 // skip sending create connection and emit event instead 4736 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4737 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4738 btstack_memory_hci_connection_free( conn ); 4739 break; 4740 case SENT_CREATE_CONNECTION: 4741 // request to send cancel connection 4742 conn->state = SEND_CANCEL_CONNECTION; 4743 hci_run(); 4744 break; 4745 default: 4746 break; 4747 } 4748 return 0; 4749 } 4750 #endif 4751 4752 #ifdef ENABLE_LE_CENTRAL 4753 /** 4754 * @brief Set connection parameters for outgoing connections 4755 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4756 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4757 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4758 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4759 * @param conn_latency, default: 4 4760 * @param supervision_timeout (unit: 10ms), default: 720 ms 4761 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4762 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4763 */ 4764 4765 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4766 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4767 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4768 hci_stack->le_connection_scan_interval = conn_scan_interval; 4769 hci_stack->le_connection_scan_window = conn_scan_window; 4770 hci_stack->le_connection_interval_min = conn_interval_min; 4771 hci_stack->le_connection_interval_max = conn_interval_max; 4772 hci_stack->le_connection_latency = conn_latency; 4773 hci_stack->le_supervision_timeout = supervision_timeout; 4774 hci_stack->le_minimum_ce_length = min_ce_length; 4775 hci_stack->le_maximum_ce_length = max_ce_length; 4776 } 4777 #endif 4778 4779 /** 4780 * @brief Updates the connection parameters for a given LE connection 4781 * @param handle 4782 * @param conn_interval_min (unit: 1.25ms) 4783 * @param conn_interval_max (unit: 1.25ms) 4784 * @param conn_latency 4785 * @param supervision_timeout (unit: 10ms) 4786 * @returns 0 if ok 4787 */ 4788 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4789 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4790 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4791 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4792 connection->le_conn_interval_min = conn_interval_min; 4793 connection->le_conn_interval_max = conn_interval_max; 4794 connection->le_conn_latency = conn_latency; 4795 connection->le_supervision_timeout = supervision_timeout; 4796 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4797 hci_run(); 4798 return 0; 4799 } 4800 4801 /** 4802 * @brief Request an update of the connection parameter for a given LE connection 4803 * @param handle 4804 * @param conn_interval_min (unit: 1.25ms) 4805 * @param conn_interval_max (unit: 1.25ms) 4806 * @param conn_latency 4807 * @param supervision_timeout (unit: 10ms) 4808 * @returns 0 if ok 4809 */ 4810 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4811 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4812 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4813 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4814 connection->le_conn_interval_min = conn_interval_min; 4815 connection->le_conn_interval_max = conn_interval_max; 4816 connection->le_conn_latency = conn_latency; 4817 connection->le_supervision_timeout = supervision_timeout; 4818 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4819 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4820 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4821 return 0; 4822 } 4823 4824 #ifdef ENABLE_LE_PERIPHERAL 4825 4826 static void gap_advertisments_changed(void){ 4827 // disable advertisements before updating adv, scan data, or adv params 4828 if (hci_stack->le_advertisements_active){ 4829 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4830 } 4831 hci_run(); 4832 } 4833 4834 /** 4835 * @brief Set Advertisement Data 4836 * @param advertising_data_length 4837 * @param advertising_data (max 31 octets) 4838 * @note data is not copied, pointer has to stay valid 4839 */ 4840 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4841 hci_stack->le_advertisements_data_len = advertising_data_length; 4842 hci_stack->le_advertisements_data = advertising_data; 4843 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4844 gap_advertisments_changed(); 4845 } 4846 4847 /** 4848 * @brief Set Scan Response Data 4849 * @param advertising_data_length 4850 * @param advertising_data (max 31 octets) 4851 * @note data is not copied, pointer has to stay valid 4852 */ 4853 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4854 hci_stack->le_scan_response_data_len = scan_response_data_length; 4855 hci_stack->le_scan_response_data = scan_response_data; 4856 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4857 gap_advertisments_changed(); 4858 } 4859 4860 /** 4861 * @brief Set Advertisement Parameters 4862 * @param adv_int_min 4863 * @param adv_int_max 4864 * @param adv_type 4865 * @param direct_address_type 4866 * @param direct_address 4867 * @param channel_map 4868 * @param filter_policy 4869 * 4870 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4871 */ 4872 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4873 uint8_t direct_address_typ, bd_addr_t direct_address, 4874 uint8_t channel_map, uint8_t filter_policy) { 4875 4876 hci_stack->le_advertisements_interval_min = adv_int_min; 4877 hci_stack->le_advertisements_interval_max = adv_int_max; 4878 hci_stack->le_advertisements_type = adv_type; 4879 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4880 hci_stack->le_advertisements_channel_map = channel_map; 4881 hci_stack->le_advertisements_filter_policy = filter_policy; 4882 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4883 6); 4884 4885 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4886 gap_advertisments_changed(); 4887 } 4888 4889 /** 4890 * @brief Enable/Disable Advertisements 4891 * @param enabled 4892 */ 4893 void gap_advertisements_enable(int enabled){ 4894 hci_stack->le_advertisements_enabled = enabled; 4895 if (enabled && !hci_stack->le_advertisements_active){ 4896 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4897 } 4898 if (!enabled && hci_stack->le_advertisements_active){ 4899 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4900 } 4901 hci_run(); 4902 } 4903 4904 #endif 4905 4906 void hci_le_set_own_address_type(uint8_t own_address_type){ 4907 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4908 if (own_address_type == hci_stack->le_own_addr_type) return; 4909 hci_stack->le_own_addr_type = own_address_type; 4910 4911 #ifdef ENABLE_LE_PERIPHERAL 4912 // update advertisement parameters, too 4913 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4914 gap_advertisments_changed(); 4915 #endif 4916 #ifdef ENABLE_LE_CENTRAL 4917 // note: we don't update scan parameters or modify ongoing connection attempts 4918 #endif 4919 } 4920 4921 #endif 4922 4923 uint8_t gap_disconnect(hci_con_handle_t handle){ 4924 hci_connection_t * conn = hci_connection_for_handle(handle); 4925 if (!conn){ 4926 hci_emit_disconnection_complete(handle, 0); 4927 return 0; 4928 } 4929 // ignore if already disconnected 4930 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4931 return 0; 4932 } 4933 conn->state = SEND_DISCONNECT; 4934 hci_run(); 4935 return 0; 4936 } 4937 4938 int gap_read_rssi(hci_con_handle_t con_handle){ 4939 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4940 if (hci_connection == NULL) return 0; 4941 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4942 hci_run(); 4943 return 1; 4944 } 4945 4946 /** 4947 * @brief Get connection type 4948 * @param con_handle 4949 * @result connection_type 4950 */ 4951 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4952 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4953 if (!conn) return GAP_CONNECTION_INVALID; 4954 switch (conn->address_type){ 4955 case BD_ADDR_TYPE_LE_PUBLIC: 4956 case BD_ADDR_TYPE_LE_RANDOM: 4957 return GAP_CONNECTION_LE; 4958 case BD_ADDR_TYPE_SCO: 4959 return GAP_CONNECTION_SCO; 4960 case BD_ADDR_TYPE_ACL: 4961 return GAP_CONNECTION_ACL; 4962 default: 4963 return GAP_CONNECTION_INVALID; 4964 } 4965 } 4966 4967 #ifdef ENABLE_BLE 4968 4969 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){ 4970 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4971 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4972 4973 conn->le_phy_update_all_phys = all_phys; 4974 conn->le_phy_update_tx_phys = tx_phys; 4975 conn->le_phy_update_rx_phys = rx_phys; 4976 conn->le_phy_update_phy_options = phy_options; 4977 4978 hci_run(); 4979 4980 return 0; 4981 } 4982 4983 #ifdef ENABLE_LE_CENTRAL 4984 /** 4985 * @brief Auto Connection Establishment - Start Connecting to device 4986 * @param address_typ 4987 * @param address 4988 * @returns 0 if ok 4989 */ 4990 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4991 // check capacity 4992 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4993 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4994 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4995 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4996 entry->address_type = address_type; 4997 (void)memcpy(entry->address, address, 6); 4998 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4999 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5000 hci_run(); 5001 return 0; 5002 } 5003 5004 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5005 btstack_linked_list_iterator_t it; 5006 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5007 while (btstack_linked_list_iterator_has_next(&it)){ 5008 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5009 if (entry->address_type != address_type) continue; 5010 if (memcmp(entry->address, address, 6) != 0) continue; 5011 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5012 // remove from controller if already present 5013 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5014 continue; 5015 } 5016 // direclty remove entry from whitelist 5017 btstack_linked_list_iterator_remove(&it); 5018 btstack_memory_whitelist_entry_free(entry); 5019 } 5020 } 5021 5022 /** 5023 * @brief Auto Connection Establishment - Stop Connecting to device 5024 * @param address_typ 5025 * @param address 5026 * @returns 0 if ok 5027 */ 5028 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5029 hci_remove_from_whitelist(address_type, address); 5030 hci_run(); 5031 return 0; 5032 } 5033 5034 /** 5035 * @brief Auto Connection Establishment - Stop everything 5036 * @note Convenience function to stop all active auto connection attempts 5037 */ 5038 void gap_auto_connection_stop_all(void){ 5039 btstack_linked_list_iterator_t it; 5040 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5041 while (btstack_linked_list_iterator_has_next(&it)){ 5042 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5043 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5044 // remove from controller if already present 5045 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5046 continue; 5047 } 5048 // directly remove entry from whitelist 5049 btstack_linked_list_iterator_remove(&it); 5050 btstack_memory_whitelist_entry_free(entry); 5051 } 5052 hci_run(); 5053 } 5054 5055 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5056 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5057 if (!conn) return 0; 5058 return conn->le_connection_interval; 5059 } 5060 #endif 5061 #endif 5062 5063 #ifdef ENABLE_CLASSIC 5064 /** 5065 * @brief Set Extended Inquiry Response data 5066 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 5067 * @note has to be done before stack starts up 5068 */ 5069 void gap_set_extended_inquiry_response(const uint8_t * data){ 5070 hci_stack->eir_data = data; 5071 } 5072 5073 /** 5074 * @brief Start GAP Classic Inquiry 5075 * @param duration in 1.28s units 5076 * @return 0 if ok 5077 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5078 */ 5079 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5080 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5081 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5082 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5083 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5084 } 5085 hci_stack->inquiry_state = duration_in_1280ms_units; 5086 hci_run(); 5087 return 0; 5088 } 5089 5090 /** 5091 * @brief Stop GAP Classic Inquiry 5092 * @returns 0 if ok 5093 */ 5094 int gap_inquiry_stop(void){ 5095 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5096 // emit inquiry complete event, before it even started 5097 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5098 hci_emit_event(event, sizeof(event), 1); 5099 return 0; 5100 } 5101 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5102 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5103 hci_run(); 5104 return 0; 5105 } 5106 5107 5108 /** 5109 * @brief Remote Name Request 5110 * @param addr 5111 * @param page_scan_repetition_mode 5112 * @param clock_offset only used when bit 15 is set 5113 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5114 */ 5115 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5116 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5117 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5118 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5119 hci_stack->remote_name_clock_offset = clock_offset; 5120 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5121 hci_run(); 5122 return 0; 5123 } 5124 5125 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5126 hci_stack->gap_pairing_state = state; 5127 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5128 hci_run(); 5129 return 0; 5130 } 5131 5132 /** 5133 * @brief Legacy Pairing Pin Code Response 5134 * @param addr 5135 * @param pin 5136 * @return 0 if ok 5137 */ 5138 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5139 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5140 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5141 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5142 } 5143 5144 /** 5145 * @brief Abort Legacy Pairing 5146 * @param addr 5147 * @param pin 5148 * @return 0 if ok 5149 */ 5150 int gap_pin_code_negative(bd_addr_t addr){ 5151 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5152 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5153 } 5154 5155 /** 5156 * @brief SSP Passkey Response 5157 * @param addr 5158 * @param passkey 5159 * @return 0 if ok 5160 */ 5161 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5162 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5163 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5164 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5165 } 5166 5167 /** 5168 * @brief Abort SSP Passkey Entry/Pairing 5169 * @param addr 5170 * @param pin 5171 * @return 0 if ok 5172 */ 5173 int gap_ssp_passkey_negative(bd_addr_t addr){ 5174 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5175 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5176 } 5177 5178 /** 5179 * @brief Accept SSP Numeric Comparison 5180 * @param addr 5181 * @param passkey 5182 * @return 0 if ok 5183 */ 5184 int gap_ssp_confirmation_response(bd_addr_t addr){ 5185 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5186 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5187 } 5188 5189 /** 5190 * @brief Abort SSP Numeric Comparison/Pairing 5191 * @param addr 5192 * @param pin 5193 * @return 0 if ok 5194 */ 5195 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5196 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5197 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5198 } 5199 5200 /** 5201 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5202 * @param inquiry_mode see bluetooth_defines.h 5203 */ 5204 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5205 hci_stack->inquiry_mode = mode; 5206 } 5207 5208 /** 5209 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5210 */ 5211 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5212 hci_stack->sco_voice_setting = voice_setting; 5213 } 5214 5215 /** 5216 * @brief Get SCO Voice Setting 5217 * @return current voice setting 5218 */ 5219 uint16_t hci_get_sco_voice_setting(void){ 5220 return hci_stack->sco_voice_setting; 5221 } 5222 5223 static int hci_have_usb_transport(void){ 5224 if (!hci_stack->hci_transport) return 0; 5225 const char * transport_name = hci_stack->hci_transport->name; 5226 if (!transport_name) return 0; 5227 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5228 } 5229 5230 /** @brief Get SCO packet length for current SCO Voice setting 5231 * @note Using SCO packets of the exact length is required for USB transfer 5232 * @return Length of SCO packets in bytes (not audio frames) 5233 */ 5234 int hci_get_sco_packet_length(void){ 5235 int sco_packet_length = 0; 5236 5237 #ifdef ENABLE_SCO_OVER_HCI 5238 5239 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5240 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5241 5242 if (hci_have_usb_transport()){ 5243 // see Core Spec for H2 USB Transfer. 5244 // 3 byte SCO header + 24 bytes per connection 5245 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5246 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5247 } else { 5248 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5249 sco_packet_length = 3 + 60 * multiplier; 5250 // assert that it still fits inside an SCO buffer 5251 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5252 sco_packet_length = 3 + 60; 5253 } 5254 } 5255 #endif 5256 return sco_packet_length; 5257 } 5258 5259 /** 5260 * @brief Sets the master/slave policy 5261 * @param policy (0: attempt to become master, 1: let connecting device decide) 5262 */ 5263 void hci_set_master_slave_policy(uint8_t policy){ 5264 hci_stack->master_slave_policy = policy; 5265 } 5266 5267 #endif 5268 5269 HCI_STATE hci_get_state(void){ 5270 return hci_stack->state; 5271 } 5272 5273 #ifdef ENABLE_CLASSIC 5274 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5275 hci_stack->gap_classic_accept_callback = accept_callback; 5276 } 5277 #endif 5278 5279 /** 5280 * @brief Set callback for Bluetooth Hardware Error 5281 */ 5282 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5283 hci_stack->hardware_error_callback = fn; 5284 } 5285 5286 void hci_disconnect_all(void){ 5287 btstack_linked_list_iterator_t it; 5288 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5289 while (btstack_linked_list_iterator_has_next(&it)){ 5290 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5291 if (con->state == SENT_DISCONNECT) continue; 5292 con->state = SEND_DISCONNECT; 5293 } 5294 hci_run(); 5295 } 5296 5297 uint16_t hci_get_manufacturer(void){ 5298 return hci_stack->manufacturer; 5299 } 5300 5301 #ifdef ENABLE_BLE 5302 5303 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5304 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5305 if (!hci_con) return NULL; 5306 return &hci_con->sm_connection; 5307 } 5308 5309 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5310 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5311 5312 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5313 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5314 if (hci_connection == NULL) return 0; 5315 if (hci_is_le_connection(hci_connection)){ 5316 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5317 if (sm_conn->sm_connection_encrypted) { 5318 return sm_conn->sm_actual_encryption_key_size; 5319 } 5320 } 5321 #ifdef ENABLE_CLASSIC 5322 else { 5323 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5324 return hci_connection->encryption_key_size; 5325 } 5326 } 5327 #endif 5328 return 0; 5329 } 5330 5331 int gap_authenticated(hci_con_handle_t con_handle){ 5332 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5333 if (hci_connection == NULL) return 0; 5334 5335 switch (hci_connection->address_type){ 5336 case BD_ADDR_TYPE_LE_PUBLIC: 5337 case BD_ADDR_TYPE_LE_RANDOM: 5338 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5339 return hci_connection->sm_connection.sm_connection_authenticated; 5340 #ifdef ENABLE_CLASSIC 5341 case BD_ADDR_TYPE_SCO: 5342 case BD_ADDR_TYPE_ACL: 5343 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5344 #endif 5345 default: 5346 return 0; 5347 } 5348 } 5349 5350 int gap_secure_connection(hci_con_handle_t con_handle){ 5351 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5352 if (hci_connection == NULL) return 0; 5353 5354 switch (hci_connection->address_type){ 5355 case BD_ADDR_TYPE_LE_PUBLIC: 5356 case BD_ADDR_TYPE_LE_RANDOM: 5357 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5358 return hci_connection->sm_connection.sm_connection_sc; 5359 #ifdef ENABLE_CLASSIC 5360 case BD_ADDR_TYPE_SCO: 5361 case BD_ADDR_TYPE_ACL: 5362 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5363 #endif 5364 default: 5365 return 0; 5366 } 5367 } 5368 5369 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5370 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5371 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5372 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5373 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5374 return sm_conn->sm_connection_authorization_state; 5375 } 5376 #endif 5377 5378 #ifdef ENABLE_CLASSIC 5379 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){ 5380 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5381 if (!conn) return GAP_CONNECTION_INVALID; 5382 conn->sniff_min_interval = sniff_min_interval; 5383 conn->sniff_max_interval = sniff_max_interval; 5384 conn->sniff_attempt = sniff_attempt; 5385 conn->sniff_timeout = sniff_timeout; 5386 hci_run(); 5387 return 0; 5388 } 5389 5390 /** 5391 * @brief Exit Sniff mode 5392 * @param con_handle 5393 @ @return 0 if ok 5394 */ 5395 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5396 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5397 if (!conn) return GAP_CONNECTION_INVALID; 5398 conn->sniff_min_interval = 0xffff; 5399 hci_run(); 5400 return 0; 5401 } 5402 #endif 5403 5404 void hci_halting_defer(void){ 5405 if (hci_stack->state != HCI_STATE_HALTING) return; 5406 switch (hci_stack->substate){ 5407 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5408 case HCI_HALTING_CLOSE: 5409 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5410 break; 5411 default: 5412 break; 5413 } 5414 } 5415 5416 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5417 void hci_setup_test_connections_fuzz(void){ 5418 hci_connection_t * conn; 5419 5420 // default address: 66:55:44:33:00:01 5421 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5422 5423 // setup Controller info 5424 hci_stack->num_cmd_packets = 255; 5425 hci_stack->acl_packets_total_num = 255; 5426 5427 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5428 addr[5] = 0x01; 5429 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5430 conn->con_handle = addr[5]; 5431 conn->role = HCI_ROLE_SLAVE; 5432 conn->state = RECEIVED_CONNECTION_REQUEST; 5433 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5434 5435 // setup incoming Classic SCO connection with con handle 0x0002 5436 addr[5] = 0x02; 5437 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5438 conn->con_handle = addr[5]; 5439 conn->role = HCI_ROLE_SLAVE; 5440 conn->state = RECEIVED_CONNECTION_REQUEST; 5441 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5442 5443 // setup ready Classic ACL connection with con handle 0x0003 5444 addr[5] = 0x03; 5445 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5446 conn->con_handle = addr[5]; 5447 conn->role = HCI_ROLE_SLAVE; 5448 conn->state = OPEN; 5449 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5450 5451 // setup ready Classic SCO connection with con handle 0x0004 5452 addr[5] = 0x04; 5453 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5454 conn->con_handle = addr[5]; 5455 conn->role = HCI_ROLE_SLAVE; 5456 conn->state = OPEN; 5457 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5458 5459 // setup ready LE ACL connection with con handle 0x005 and public address 5460 addr[5] = 0x05; 5461 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5462 conn->con_handle = addr[5]; 5463 conn->role = HCI_ROLE_SLAVE; 5464 conn->state = OPEN; 5465 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5466 } 5467 5468 void hci_free_connections_fuzz(void){ 5469 btstack_linked_list_iterator_t it; 5470 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5471 while (btstack_linked_list_iterator_has_next(&it)){ 5472 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5473 btstack_linked_list_iterator_remove(&it); 5474 btstack_memory_hci_connection_free(con); 5475 } 5476 } 5477 void hci_simulate_working_fuzz(void){ 5478 hci_init_done(); 5479 hci_stack->num_cmd_packets = 255; 5480 } 5481 #endif 5482