1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static void hci_notify_if_sco_can_send_now(void); 137 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 138 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 139 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 140 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 141 static void hci_connection_timestamp(hci_connection_t *connection); 142 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 143 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 144 #endif 145 146 static int hci_power_control_on(void); 147 static void hci_power_control_off(void); 148 static void hci_state_reset(void); 149 static void hci_emit_transport_packet_sent(void); 150 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 151 static void hci_emit_nr_connections_changed(void); 152 static void hci_emit_hci_open_failed(void); 153 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 154 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 155 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 156 static void hci_run(void); 157 static int hci_is_le_connection(hci_connection_t * connection); 158 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 159 160 #ifdef ENABLE_CLASSIC 161 static int hci_have_usb_transport(void); 162 #endif 163 164 #ifdef ENABLE_BLE 165 #ifdef ENABLE_LE_CENTRAL 166 // called from test/ble_client/advertising_data_parser.c 167 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 168 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 169 static hci_connection_t * gap_get_outgoing_connection(void); 170 #endif 171 #endif 172 173 // the STACK is here 174 #ifndef HAVE_MALLOC 175 static hci_stack_t hci_stack_static; 176 #endif 177 static hci_stack_t * hci_stack = NULL; 178 179 #ifdef ENABLE_CLASSIC 180 // default name 181 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 182 183 // test helper 184 static uint8_t disable_l2cap_timeouts = 0; 185 #endif 186 187 /** 188 * create connection for given address 189 * 190 * @return connection OR NULL, if no memory left 191 */ 192 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 193 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 194 hci_connection_t * conn = btstack_memory_hci_connection_get(); 195 if (!conn) return NULL; 196 bd_addr_copy(conn->address, addr); 197 conn->address_type = addr_type; 198 conn->con_handle = 0xffff; 199 conn->authentication_flags = AUTH_FLAGS_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 204 btstack_run_loop_set_timer_context(&conn->timeout, conn); 205 hci_connection_timestamp(conn); 206 #endif 207 conn->acl_recombination_length = 0; 208 conn->acl_recombination_pos = 0; 209 conn->num_packets_sent = 0; 210 211 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 212 #ifdef ENABLE_BLE 213 conn->le_phy_update_all_phys = 0xff; 214 #endif 215 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 216 conn->le_max_tx_octets = 27; 217 #endif 218 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 219 return conn; 220 } 221 222 223 /** 224 * get le connection parameter range 225 * 226 * @return le connection parameter range struct 227 */ 228 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 229 *range = hci_stack->le_connection_parameter_range; 230 } 231 232 /** 233 * set le connection parameter range 234 * 235 */ 236 237 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 238 hci_stack->le_connection_parameter_range = *range; 239 } 240 241 /** 242 * @brief Test if connection parameters are inside in existing rage 243 * @param conn_interval_min (unit: 1.25ms) 244 * @param conn_interval_max (unit: 1.25ms) 245 * @param conn_latency 246 * @param supervision_timeout (unit: 10ms) 247 * @returns 1 if included 248 */ 249 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 250 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 251 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 252 253 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 254 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 255 256 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 257 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 258 259 return 1; 260 } 261 262 /** 263 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 264 * @note: default: 1 265 * @param max_peripheral_connections 266 */ 267 #ifdef ENABLE_LE_PERIPHERAL 268 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 269 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 270 } 271 #endif 272 273 /** 274 * get hci connections iterator 275 * 276 * @return hci connections iterator 277 */ 278 279 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 280 btstack_linked_list_iterator_init(it, &hci_stack->connections); 281 } 282 283 /** 284 * get connection for a given handle 285 * 286 * @return connection OR NULL, if not found 287 */ 288 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 289 btstack_linked_list_iterator_t it; 290 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 291 while (btstack_linked_list_iterator_has_next(&it)){ 292 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 293 if ( item->con_handle == con_handle ) { 294 return item; 295 } 296 } 297 return NULL; 298 } 299 300 /** 301 * get connection for given address 302 * 303 * @return connection OR NULL, if not found 304 */ 305 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 306 btstack_linked_list_iterator_t it; 307 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 308 while (btstack_linked_list_iterator_has_next(&it)){ 309 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 310 if (connection->address_type != addr_type) continue; 311 if (memcmp(addr, connection->address, 6) != 0) continue; 312 return connection; 313 } 314 return NULL; 315 } 316 317 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 318 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 319 } 320 321 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 322 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 323 } 324 325 #ifdef ENABLE_CLASSIC 326 327 #ifdef ENABLE_SCO_OVER_HCI 328 static int hci_number_sco_connections(void){ 329 int connections = 0; 330 btstack_linked_list_iterator_t it; 331 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 332 while (btstack_linked_list_iterator_has_next(&it)){ 333 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 334 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 335 connections++; 336 } 337 return connections; 338 } 339 #endif 340 341 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 342 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 343 #ifdef HAVE_EMBEDDED_TICK 344 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 345 // connections might be timed out 346 hci_emit_l2cap_check_timeout(connection); 347 } 348 #else 349 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 350 // connections might be timed out 351 hci_emit_l2cap_check_timeout(connection); 352 } 353 #endif 354 } 355 356 static void hci_connection_timestamp(hci_connection_t *connection){ 357 #ifdef HAVE_EMBEDDED_TICK 358 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 359 #else 360 connection->timestamp = btstack_run_loop_get_time_ms(); 361 #endif 362 } 363 364 /** 365 * add authentication flags and reset timer 366 * @note: assumes classic connection 367 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 368 */ 369 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 370 bd_addr_t addr; 371 reverse_bd_addr(bd_addr, addr); 372 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 373 if (conn) { 374 connectionSetAuthenticationFlags(conn, flags); 375 hci_connection_timestamp(conn); 376 } 377 } 378 379 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 380 hci_connection_t * conn = hci_connection_for_handle(handle); 381 if (!conn) return 0; 382 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 383 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 384 return 0; 385 } 386 387 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 390 hci_stack->link_key_db->delete_link_key(addr); 391 } 392 393 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 394 if (!hci_stack->link_key_db) return; 395 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 396 hci_stack->link_key_db->put_link_key(addr, link_key, type); 397 } 398 399 void gap_delete_all_link_keys(void){ 400 bd_addr_t addr; 401 link_key_t link_key; 402 link_key_type_t type; 403 btstack_link_key_iterator_t it; 404 int ok = gap_link_key_iterator_init(&it); 405 if (!ok) { 406 log_error("could not initialize iterator"); 407 return; 408 } 409 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 410 gap_drop_link_key_for_bd_addr(addr); 411 } 412 gap_link_key_iterator_done(&it); 413 } 414 415 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 416 if (!hci_stack->link_key_db) return 0; 417 if (!hci_stack->link_key_db->iterator_init) return 0; 418 return hci_stack->link_key_db->iterator_init(it); 419 } 420 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 421 if (!hci_stack->link_key_db) return 0; 422 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 423 } 424 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 425 if (!hci_stack->link_key_db) return; 426 hci_stack->link_key_db->iterator_done(it); 427 } 428 #endif 429 430 static int hci_is_le_connection(hci_connection_t * connection){ 431 switch (connection->address_type){ 432 case BD_ADDR_TYPE_LE_PUBLIC: 433 case BD_ADDR_TYPE_LE_RANDOM: 434 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 436 return 1; 437 default: 438 return 0; 439 } 440 } 441 442 /** 443 * count connections 444 */ 445 static int nr_hci_connections(void){ 446 int count = 0; 447 btstack_linked_item_t *it; 448 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 449 count++; 450 } 451 return count; 452 } 453 454 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 455 456 unsigned int num_packets_sent_classic = 0; 457 unsigned int num_packets_sent_le = 0; 458 459 btstack_linked_item_t *it; 460 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 461 hci_connection_t * connection = (hci_connection_t *) it; 462 if (hci_is_le_connection(connection)){ 463 num_packets_sent_le += connection->num_packets_sent; 464 } 465 if (connection->address_type == BD_ADDR_TYPE_ACL){ 466 num_packets_sent_classic += connection->num_packets_sent; 467 } 468 } 469 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 470 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 471 int free_slots_le = 0; 472 473 if (free_slots_classic < 0){ 474 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 475 return 0; 476 } 477 478 if (hci_stack->le_acl_packets_total_num){ 479 // if we have LE slots, they are used 480 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 481 if (free_slots_le < 0){ 482 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 483 return 0; 484 } 485 } else { 486 // otherwise, classic slots are used for LE, too 487 free_slots_classic -= num_packets_sent_le; 488 if (free_slots_classic < 0){ 489 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 490 return 0; 491 } 492 } 493 494 switch (address_type){ 495 case BD_ADDR_TYPE_UNKNOWN: 496 log_error("hci_number_free_acl_slots: unknown address type"); 497 return 0; 498 499 case BD_ADDR_TYPE_ACL: 500 return free_slots_classic; 501 502 default: 503 if (hci_stack->le_acl_packets_total_num){ 504 return free_slots_le; 505 } 506 return free_slots_classic; 507 } 508 } 509 510 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 511 // get connection type 512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 513 if (!connection){ 514 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 515 return 0; 516 } 517 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 518 } 519 520 #ifdef ENABLE_CLASSIC 521 static int hci_number_free_sco_slots(void){ 522 unsigned int num_sco_packets_sent = 0; 523 btstack_linked_item_t *it; 524 if (hci_stack->synchronous_flow_control_enabled){ 525 // explicit flow control 526 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 527 hci_connection_t * connection = (hci_connection_t *) it; 528 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 529 num_sco_packets_sent += connection->num_packets_sent; 530 } 531 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 532 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 533 return 0; 534 } 535 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 536 } else { 537 // implicit flow control -- TODO 538 int num_ready = 0; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 540 hci_connection_t * connection = (hci_connection_t *) it; 541 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 542 if (connection->sco_tx_ready == 0) continue; 543 num_ready++; 544 } 545 return num_ready; 546 } 547 } 548 #endif 549 550 // only used to send HCI Host Number Completed Packets 551 static int hci_can_send_comand_packet_transport(void){ 552 if (hci_stack->hci_packet_buffer_reserved) return 0; 553 554 // check for async hci transport implementations 555 if (hci_stack->hci_transport->can_send_packet_now){ 556 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 557 return 0; 558 } 559 } 560 return 1; 561 } 562 563 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 564 int hci_can_send_command_packet_now(void){ 565 if (hci_can_send_comand_packet_transport() == 0) return 0; 566 return hci_stack->num_cmd_packets > 0; 567 } 568 569 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 570 // check for async hci transport implementations 571 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 572 return hci_stack->hci_transport->can_send_packet_now(packet_type); 573 } 574 575 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 576 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 577 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 578 } 579 580 int hci_can_send_acl_le_packet_now(void){ 581 if (hci_stack->hci_packet_buffer_reserved) return 0; 582 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 583 } 584 585 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 586 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 587 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 588 } 589 590 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_now(con_handle); 593 } 594 595 #ifdef ENABLE_CLASSIC 596 int hci_can_send_acl_classic_packet_now(void){ 597 if (hci_stack->hci_packet_buffer_reserved) return 0; 598 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 599 } 600 601 int hci_can_send_prepared_sco_packet_now(void){ 602 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 603 if (hci_have_usb_transport()){ 604 return hci_stack->sco_can_send_now; 605 } else { 606 return hci_number_free_sco_slots() > 0; 607 } 608 } 609 610 int hci_can_send_sco_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_sco_packet_now(); 613 } 614 615 void hci_request_sco_can_send_now_event(void){ 616 hci_stack->sco_waiting_for_can_send_now = 1; 617 hci_notify_if_sco_can_send_now(); 618 } 619 #endif 620 621 // used for internal checks in l2cap.c 622 int hci_is_packet_buffer_reserved(void){ 623 return hci_stack->hci_packet_buffer_reserved; 624 } 625 626 // reserves outgoing packet buffer. @returns 1 if successful 627 int hci_reserve_packet_buffer(void){ 628 if (hci_stack->hci_packet_buffer_reserved) { 629 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 630 return 0; 631 } 632 hci_stack->hci_packet_buffer_reserved = 1; 633 return 1; 634 } 635 636 void hci_release_packet_buffer(void){ 637 hci_stack->hci_packet_buffer_reserved = 0; 638 } 639 640 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 641 static int hci_transport_synchronous(void){ 642 return hci_stack->hci_transport->can_send_packet_now == NULL; 643 } 644 645 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 646 647 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 648 649 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 650 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 651 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 652 max_acl_data_packet_length = hci_stack->le_data_packets_length; 653 } 654 655 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 656 if (hci_is_le_connection(connection)){ 657 max_acl_data_packet_length = connection->le_max_tx_octets; 658 } 659 #endif 660 661 log_debug("hci_send_acl_packet_fragments entered"); 662 663 int err; 664 // multiple packets could be send on a synchronous HCI transport 665 while (true){ 666 667 log_debug("hci_send_acl_packet_fragments loop entered"); 668 669 // get current data 670 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 671 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 672 int more_fragments = 0; 673 674 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 675 if (current_acl_data_packet_length > max_acl_data_packet_length){ 676 more_fragments = 1; 677 current_acl_data_packet_length = max_acl_data_packet_length; 678 } 679 680 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 681 if (acl_header_pos > 0){ 682 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 683 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 684 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 685 } 686 687 // update header len 688 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 689 690 // count packet 691 connection->num_packets_sent++; 692 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 693 694 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 695 if (more_fragments){ 696 // update start of next fragment to send 697 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 698 } else { 699 // done 700 hci_stack->acl_fragmentation_pos = 0; 701 hci_stack->acl_fragmentation_total_size = 0; 702 } 703 704 // send packet 705 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 706 const int size = current_acl_data_packet_length + 4; 707 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 708 hci_stack->acl_fragmentation_tx_active = 1; 709 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 710 711 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 712 713 // done yet? 714 if (!more_fragments) break; 715 716 // can send more? 717 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 718 } 719 720 log_debug("hci_send_acl_packet_fragments loop over"); 721 722 // release buffer now for synchronous transport 723 if (hci_transport_synchronous()){ 724 hci_stack->acl_fragmentation_tx_active = 0; 725 hci_release_packet_buffer(); 726 hci_emit_transport_packet_sent(); 727 } 728 729 return err; 730 } 731 732 // pre: caller has reserved the packet buffer 733 int hci_send_acl_packet_buffer(int size){ 734 735 // log_info("hci_send_acl_packet_buffer size %u", size); 736 737 if (!hci_stack->hci_packet_buffer_reserved) { 738 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 739 return 0; 740 } 741 742 uint8_t * packet = hci_stack->hci_packet_buffer; 743 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 744 745 // check for free places on Bluetooth module 746 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 747 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 748 hci_release_packet_buffer(); 749 hci_emit_transport_packet_sent(); 750 return BTSTACK_ACL_BUFFERS_FULL; 751 } 752 753 hci_connection_t *connection = hci_connection_for_handle( con_handle); 754 if (!connection) { 755 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 756 hci_release_packet_buffer(); 757 hci_emit_transport_packet_sent(); 758 return 0; 759 } 760 761 #ifdef ENABLE_CLASSIC 762 hci_connection_timestamp(connection); 763 #endif 764 765 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 766 767 // setup data 768 hci_stack->acl_fragmentation_total_size = size; 769 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 770 771 return hci_send_acl_packet_fragments(connection); 772 } 773 774 #ifdef ENABLE_CLASSIC 775 // pre: caller has reserved the packet buffer 776 int hci_send_sco_packet_buffer(int size){ 777 778 // log_info("hci_send_acl_packet_buffer size %u", size); 779 780 if (!hci_stack->hci_packet_buffer_reserved) { 781 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 782 return 0; 783 } 784 785 uint8_t * packet = hci_stack->hci_packet_buffer; 786 787 // skip checks in loopback mode 788 if (!hci_stack->loopback_mode){ 789 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 790 791 // check for free places on Bluetooth module 792 if (!hci_can_send_prepared_sco_packet_now()) { 793 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return BTSTACK_ACL_BUFFERS_FULL; 797 } 798 799 // track send packet in connection struct 800 hci_connection_t *connection = hci_connection_for_handle( con_handle); 801 if (!connection) { 802 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 803 hci_release_packet_buffer(); 804 hci_emit_transport_packet_sent(); 805 return 0; 806 } 807 808 if (hci_have_usb_transport()){ 809 // token used 810 hci_stack->sco_can_send_now = 0; 811 } else { 812 if (hci_stack->synchronous_flow_control_enabled){ 813 connection->num_packets_sent++; 814 } else { 815 connection->sco_tx_ready--; 816 } 817 } 818 } 819 820 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 821 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 822 823 if (hci_transport_synchronous()){ 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 } 827 828 return err; 829 } 830 #endif 831 832 static void acl_handler(uint8_t *packet, int size){ 833 834 // log_info("acl_handler: size %u", size); 835 836 // get info 837 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 838 hci_connection_t *conn = hci_connection_for_handle(con_handle); 839 uint8_t acl_flags = READ_ACL_FLAGS(packet); 840 uint16_t acl_length = READ_ACL_LENGTH(packet); 841 842 // ignore non-registered handle 843 if (!conn){ 844 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 845 return; 846 } 847 848 // assert packet is complete 849 if ((acl_length + 4) != size){ 850 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 851 return; 852 } 853 854 #ifdef ENABLE_CLASSIC 855 // update idle timestamp 856 hci_connection_timestamp(conn); 857 #endif 858 859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 860 hci_stack->host_completed_packets = 1; 861 conn->num_packets_completed++; 862 #endif 863 864 // handle different packet types 865 switch (acl_flags & 0x03) { 866 867 case 0x01: // continuation fragment 868 869 // sanity checks 870 if (conn->acl_recombination_pos == 0) { 871 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 872 return; 873 } 874 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 875 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 876 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 877 conn->acl_recombination_pos = 0; 878 return; 879 } 880 881 // append fragment payload (header already stored) 882 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 883 &packet[4], acl_length); 884 conn->acl_recombination_pos += acl_length; 885 886 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 887 // conn->acl_recombination_pos, conn->acl_recombination_length); 888 889 // forward complete L2CAP packet if complete. 890 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 891 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 892 // reset recombination buffer 893 conn->acl_recombination_length = 0; 894 conn->acl_recombination_pos = 0; 895 } 896 break; 897 898 case 0x02: { // first fragment 899 900 // sanity check 901 if (conn->acl_recombination_pos) { 902 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 903 conn->acl_recombination_pos = 0; 904 } 905 906 // peek into L2CAP packet! 907 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 908 909 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 910 911 // compare fragment size to L2CAP packet size 912 if (acl_length >= (l2cap_length + 4)){ 913 // forward fragment as L2CAP packet 914 hci_emit_acl_packet(packet, acl_length + 4); 915 } else { 916 917 if (acl_length > HCI_ACL_BUFFER_SIZE){ 918 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 919 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 920 return; 921 } 922 923 // store first fragment and tweak acl length for complete package 924 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 925 packet, acl_length + 4); 926 conn->acl_recombination_pos = acl_length + 4; 927 conn->acl_recombination_length = l2cap_length; 928 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 929 } 930 break; 931 932 } 933 default: 934 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 935 return; 936 } 937 938 // execute main loop 939 hci_run(); 940 } 941 942 static void hci_shutdown_connection(hci_connection_t *conn){ 943 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 int addr_type = conn->address_type; 948 #endif 949 #endif 950 951 btstack_run_loop_remove_timer(&conn->timeout); 952 953 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 954 btstack_memory_hci_connection_free( conn ); 955 956 // now it's gone 957 hci_emit_nr_connections_changed(); 958 959 #ifdef ENABLE_CLASSIC 960 #ifdef ENABLE_SCO_OVER_HCI 961 // update SCO 962 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 963 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 964 } 965 #endif 966 #endif 967 } 968 969 #ifdef ENABLE_CLASSIC 970 971 static const uint16_t packet_type_sizes[] = { 972 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 973 HCI_ACL_DH1_SIZE, 0, 0, 0, 974 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 975 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 976 }; 977 static const uint8_t packet_type_feature_requirement_bit[] = { 978 0, // 3 slot packets 979 1, // 5 slot packets 980 25, // EDR 2 mpbs 981 26, // EDR 3 mbps 982 39, // 3 slot EDR packts 983 40, // 5 slot EDR packet 984 }; 985 static const uint16_t packet_type_feature_packet_mask[] = { 986 0x0f00, // 3 slot packets 987 0xf000, // 5 slot packets 988 0x1102, // EDR 2 mpbs 989 0x2204, // EDR 3 mbps 990 0x0300, // 3 slot EDR packts 991 0x3000, // 5 slot EDR packet 992 }; 993 994 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 995 // enable packet types based on size 996 uint16_t packet_types = 0; 997 unsigned int i; 998 for (i=0;i<16;i++){ 999 if (packet_type_sizes[i] == 0) continue; 1000 if (packet_type_sizes[i] <= buffer_size){ 1001 packet_types |= 1 << i; 1002 } 1003 } 1004 // disable packet types due to missing local supported features 1005 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1006 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1007 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1008 if (feature_set) continue; 1009 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1010 packet_types &= ~packet_type_feature_packet_mask[i]; 1011 } 1012 // flip bits for "may not be used" 1013 packet_types ^= 0x3306; 1014 return packet_types; 1015 } 1016 1017 uint16_t hci_usable_acl_packet_types(void){ 1018 return hci_stack->packet_types; 1019 } 1020 #endif 1021 1022 uint8_t* hci_get_outgoing_packet_buffer(void){ 1023 // hci packet buffer is >= acl data packet length 1024 return hci_stack->hci_packet_buffer; 1025 } 1026 1027 uint16_t hci_max_acl_data_packet_length(void){ 1028 return hci_stack->acl_data_packet_length; 1029 } 1030 1031 #ifdef ENABLE_CLASSIC 1032 int hci_extended_sco_link_supported(void){ 1033 // No. 31, byte 3, bit 7 1034 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1035 } 1036 #endif 1037 1038 int hci_non_flushable_packet_boundary_flag_supported(void){ 1039 // No. 54, byte 6, bit 6 1040 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1041 } 1042 1043 static int gap_ssp_supported(void){ 1044 // No. 51, byte 6, bit 3 1045 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1046 } 1047 1048 static int hci_classic_supported(void){ 1049 #ifdef ENABLE_CLASSIC 1050 // No. 37, byte 4, bit 5, = No BR/EDR Support 1051 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 static int hci_le_supported(void){ 1058 #ifdef ENABLE_BLE 1059 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1060 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1061 #else 1062 return 0; 1063 #endif 1064 } 1065 1066 #ifdef ENABLE_BLE 1067 1068 /** 1069 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1070 */ 1071 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1072 *addr_type = hci_stack->le_own_addr_type; 1073 if (hci_stack->le_own_addr_type){ 1074 (void)memcpy(addr, hci_stack->le_random_address, 6); 1075 } else { 1076 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1077 } 1078 } 1079 1080 #ifdef ENABLE_LE_CENTRAL 1081 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1082 1083 int offset = 3; 1084 int num_reports = packet[offset]; 1085 offset += 1; 1086 1087 int i; 1088 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1089 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1090 for (i=0; (i<num_reports) && (offset < size);i++){ 1091 // sanity checks on data_length: 1092 uint8_t data_length = packet[offset + 8]; 1093 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1094 if ((offset + 9 + data_length + 1) > size) return; 1095 // setup event 1096 uint8_t event_size = 10 + data_length; 1097 int pos = 0; 1098 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1099 event[pos++] = event_size; 1100 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1101 offset += 8; 1102 pos += 8; 1103 event[pos++] = packet[offset + 1 + data_length]; // rssi 1104 event[pos++] = data_length; 1105 offset++; 1106 (void)memcpy(&event[pos], &packet[offset], data_length); 1107 pos += data_length; 1108 offset += data_length + 1; // rssi 1109 hci_emit_event(event, pos, 1); 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #ifdef ENABLE_BLE 1116 #ifdef ENABLE_LE_PERIPHERAL 1117 static void hci_reenable_advertisements_if_needed(void){ 1118 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1119 // get number of active le slave connections 1120 int num_slave_connections = 0; 1121 btstack_linked_list_iterator_t it; 1122 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1123 while (btstack_linked_list_iterator_has_next(&it)){ 1124 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1125 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1126 if (con->state != OPEN) continue; 1127 if (con->role != HCI_ROLE_SLAVE) continue; 1128 if (!hci_is_le_connection(con)) continue; 1129 num_slave_connections++; 1130 } 1131 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1132 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1133 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1134 } 1135 } 1136 } 1137 #endif 1138 #endif 1139 1140 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1141 1142 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1143 if (!hci_stack->config) return 0; 1144 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1145 // Limit baud rate for Broadcom chipsets to 3 mbps 1146 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1147 baud_rate = 3000000; 1148 } 1149 return baud_rate; 1150 } 1151 1152 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1153 UNUSED(ds); 1154 1155 switch (hci_stack->substate){ 1156 case HCI_INIT_W4_SEND_RESET: 1157 log_info("Resend HCI Reset"); 1158 hci_stack->substate = HCI_INIT_SEND_RESET; 1159 hci_stack->num_cmd_packets = 1; 1160 hci_run(); 1161 break; 1162 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1163 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1164 if (hci_stack->hci_transport->reset_link){ 1165 hci_stack->hci_transport->reset_link(); 1166 } 1167 1168 /* fall through */ 1169 1170 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1171 log_info("Resend HCI Reset - CSR Warm Boot"); 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_stack->num_cmd_packets = 1; 1174 hci_run(); 1175 break; 1176 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1177 if (hci_stack->hci_transport->set_baudrate){ 1178 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1179 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1180 hci_stack->hci_transport->set_baudrate(baud_rate); 1181 } 1182 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1183 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1184 if (hci_stack->hci_transport->reset_link){ 1185 log_info("Link Reset"); 1186 hci_stack->hci_transport->reset_link(); 1187 } 1188 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1189 hci_run(); 1190 } 1191 break; 1192 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1193 // otherwise continue 1194 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1195 hci_send_cmd(&hci_read_local_supported_commands); 1196 break; 1197 default: 1198 break; 1199 } 1200 } 1201 #endif 1202 1203 static void hci_initializing_next_state(void){ 1204 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1205 } 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3 + hci_stack->hci_packet_buffer[2]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1315 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 uint16_t bcm_delay_ms = 300; 1330 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1331 // -> Work around: wait here. 1332 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1422 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1423 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1424 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1425 // expand '00:00:00:00:00:00' in name with bd_addr 1426 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1427 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1428 break; 1429 } 1430 case HCI_INIT_WRITE_EIR_DATA: { 1431 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1432 hci_reserve_packet_buffer(); 1433 uint8_t * packet = hci_stack->hci_packet_buffer; 1434 // construct HCI Command in-place and send 1435 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1436 hci_stack->last_cmd_opcode = opcode; 1437 uint16_t offset = 0; 1438 packet[offset++] = opcode & 0xff; 1439 packet[offset++] = opcode >> 8; 1440 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1441 packet[offset++] = 0; // FEC not required 1442 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 if (hci_stack->eir_data){ 1444 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1445 ad_context_t context; 1446 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1447 uint8_t data_type = ad_iterator_get_data_type(&context); 1448 uint8_t size = ad_iterator_get_data_len(&context); 1449 const uint8_t *data = ad_iterator_get_data(&context); 1450 // copy item 1451 packet[offset++] = size + 1; 1452 packet[offset++] = data_type; 1453 memcpy(&packet[offset], data, size); 1454 // update name item 1455 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1456 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1457 } 1458 offset += size; 1459 } 1460 } else { 1461 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1462 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1463 packet[offset++] = bytes_to_copy + 1; 1464 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1465 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1466 // expand '00:00:00:00:00:00' in name with bd_addr 1467 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1468 } 1469 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 break; 1471 } 1472 case HCI_INIT_WRITE_INQUIRY_MODE: 1473 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1474 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1475 break; 1476 case HCI_INIT_WRITE_SCAN_ENABLE: 1477 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1478 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1479 break; 1480 // only sent if ENABLE_SCO_OVER_HCI is defined 1481 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1482 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1483 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1484 break; 1485 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1487 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1488 break; 1489 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1490 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1491 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1492 log_info("BCM: Route SCO data via HCI transport"); 1493 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1494 break; 1495 1496 #endif 1497 #ifdef ENABLE_BLE 1498 // LE INIT 1499 case HCI_INIT_LE_READ_BUFFER_SIZE: 1500 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1501 hci_send_cmd(&hci_le_read_buffer_size); 1502 break; 1503 case HCI_INIT_LE_SET_EVENT_MASK: 1504 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1505 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1506 break; 1507 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1508 // LE Supported Host = 1, Simultaneous Host = 0 1509 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1510 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1511 break; 1512 #endif 1513 1514 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1515 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1516 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1517 hci_send_cmd(&hci_le_read_maximum_data_length); 1518 break; 1519 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1520 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1521 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1522 break; 1523 #endif 1524 1525 #ifdef ENABLE_LE_CENTRAL 1526 case HCI_INIT_READ_WHITE_LIST_SIZE: 1527 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1528 hci_send_cmd(&hci_le_read_white_list_size); 1529 break; 1530 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1531 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1532 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1533 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); 1534 break; 1535 #endif 1536 default: 1537 return; 1538 } 1539 } 1540 1541 static void hci_init_done(void){ 1542 // done. tell the app 1543 log_info("hci_init_done -> HCI_STATE_WORKING"); 1544 hci_stack->state = HCI_STATE_WORKING; 1545 hci_emit_state(); 1546 hci_run(); 1547 } 1548 1549 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1550 bool command_completed = false; 1551 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1552 uint16_t opcode = little_endian_read_16(packet,3); 1553 if (opcode == hci_stack->last_cmd_opcode){ 1554 command_completed = true; 1555 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1556 } else { 1557 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1558 } 1559 } 1560 1561 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1562 uint8_t status = packet[2]; 1563 uint16_t opcode = little_endian_read_16(packet,4); 1564 if (opcode == hci_stack->last_cmd_opcode){ 1565 if (status){ 1566 command_completed = true; 1567 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1568 } else { 1569 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1570 } 1571 } else { 1572 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1573 } 1574 } 1575 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1576 // Vendor == CSR 1577 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1578 // TODO: track actual command 1579 command_completed = true; 1580 } 1581 1582 // Vendor == Toshiba 1583 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1584 // TODO: track actual command 1585 command_completed = true; 1586 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1587 hci_stack->num_cmd_packets = 1; 1588 } 1589 #endif 1590 1591 return command_completed; 1592 } 1593 1594 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1595 1596 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1597 1598 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1599 1600 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1601 1602 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1603 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1604 // 1605 // HCI Reset 1606 // Timeout 100 ms 1607 // HCI Reset 1608 // Command Complete Reset 1609 // HCI Read Local Version Information 1610 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1611 // hang... 1612 // 1613 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1614 if (!command_completed 1615 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1616 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1617 1618 uint16_t opcode = little_endian_read_16(packet,3); 1619 if (opcode == hci_reset.opcode){ 1620 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1621 return; 1622 } 1623 } 1624 1625 // CSR & H5 1626 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1627 if (!command_completed 1628 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1629 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1630 1631 uint16_t opcode = little_endian_read_16(packet,3); 1632 if (opcode == hci_reset.opcode){ 1633 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1634 return; 1635 } 1636 } 1637 1638 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1639 // fix: Correct substate and behave as command below 1640 if (command_completed){ 1641 switch (hci_stack->substate){ 1642 case HCI_INIT_SEND_RESET: 1643 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1644 break; 1645 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1646 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1647 break; 1648 default: 1649 break; 1650 } 1651 } 1652 1653 #endif 1654 1655 if (!command_completed) return; 1656 1657 bool need_baud_change = false; 1658 bool need_addr_change = false; 1659 1660 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1661 need_baud_change = hci_stack->config 1662 && hci_stack->chipset 1663 && hci_stack->chipset->set_baudrate_command 1664 && hci_stack->hci_transport->set_baudrate 1665 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1666 1667 need_addr_change = hci_stack->custom_bd_addr_set 1668 && hci_stack->chipset 1669 && hci_stack->chipset->set_bd_addr_command; 1670 #endif 1671 1672 switch(hci_stack->substate){ 1673 1674 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1675 case HCI_INIT_SEND_RESET: 1676 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1677 // fix: just correct substate and behave as command below 1678 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1679 btstack_run_loop_remove_timer(&hci_stack->timeout); 1680 break; 1681 case HCI_INIT_W4_SEND_RESET: 1682 btstack_run_loop_remove_timer(&hci_stack->timeout); 1683 break; 1684 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1685 log_info("Received local name, need baud change %d", (int) need_baud_change); 1686 if (need_baud_change){ 1687 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1688 return; 1689 } 1690 // skip baud change 1691 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1692 return; 1693 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1694 // for STLC2500D, baud rate change already happened. 1695 // for others, baud rate gets changed now 1696 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1697 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1698 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1699 hci_stack->hci_transport->set_baudrate(baud_rate); 1700 } 1701 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1702 return; 1703 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1704 btstack_run_loop_remove_timer(&hci_stack->timeout); 1705 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1706 return; 1707 case HCI_INIT_W4_CUSTOM_INIT: 1708 // repeat custom init 1709 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1710 return; 1711 #else 1712 case HCI_INIT_W4_SEND_RESET: 1713 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1714 return ; 1715 #endif 1716 1717 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1718 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1719 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1720 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1721 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1722 return; 1723 } 1724 if (need_addr_change){ 1725 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1726 return; 1727 } 1728 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1729 return; 1730 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1731 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1732 if (need_baud_change){ 1733 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1734 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1735 hci_stack->hci_transport->set_baudrate(baud_rate); 1736 } 1737 if (need_addr_change){ 1738 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1739 return; 1740 } 1741 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1742 return; 1743 case HCI_INIT_W4_SET_BD_ADDR: 1744 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1745 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1746 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1747 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1748 return; 1749 } 1750 // skipping st warm boot 1751 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1752 return; 1753 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1754 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1755 return; 1756 #endif 1757 case HCI_INIT_W4_READ_BD_ADDR: 1758 // only read buffer size if supported 1759 if (hci_stack->local_supported_commands[0] & 0x01) { 1760 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1761 return; 1762 } 1763 // skipping read buffer size 1764 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1765 return; 1766 case HCI_INIT_W4_SET_EVENT_MASK: 1767 // skip Classic init commands for LE only chipsets 1768 if (!hci_classic_supported()){ 1769 #ifdef ENABLE_BLE 1770 if (hci_le_supported()){ 1771 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1772 return; 1773 } 1774 #endif 1775 log_error("Neither BR/EDR nor LE supported"); 1776 hci_init_done(); 1777 return; 1778 } 1779 if (!gap_ssp_supported()){ 1780 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1781 return; 1782 } 1783 break; 1784 #ifdef ENABLE_BLE 1785 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1786 // skip write le host if not supported (e.g. on LE only EM9301) 1787 if (hci_stack->local_supported_commands[0] & 0x02) break; 1788 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1789 return; 1790 1791 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1792 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1793 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1794 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1795 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1796 return; 1797 } 1798 // explicit fall through to reduce repetitions 1799 1800 #ifdef ENABLE_LE_CENTRAL 1801 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1802 #else 1803 hci_init_done(); 1804 #endif 1805 return; 1806 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1807 1808 #endif /* ENABLE_BLE */ 1809 1810 #ifdef ENABLE_SCO_OVER_HCI 1811 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1812 // skip write synchronous flow control if not supported 1813 if (hci_stack->local_supported_commands[0] & 0x04) break; 1814 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1815 1816 /* fall through */ 1817 1818 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1819 // skip write default erroneous data reporting if not supported 1820 if (hci_stack->local_supported_commands[0] & 0x08) break; 1821 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1822 1823 /* fall through */ 1824 1825 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1826 // skip bcm set sco pcm config on non-Broadcom chipsets 1827 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1828 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1829 1830 /* fall through */ 1831 1832 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1833 if (!hci_le_supported()){ 1834 // SKIP LE init for Classic only configuration 1835 hci_init_done(); 1836 return; 1837 } 1838 break; 1839 1840 #else /* !ENABLE_SCO_OVER_HCI */ 1841 1842 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1843 #ifdef ENABLE_BLE 1844 if (hci_le_supported()){ 1845 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1846 return; 1847 } 1848 #endif 1849 // SKIP LE init for Classic only configuration 1850 hci_init_done(); 1851 return; 1852 #endif /* ENABLE_SCO_OVER_HCI */ 1853 1854 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1855 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1856 // Response to command before init done state -> init done 1857 case (HCI_INIT_DONE-1): 1858 hci_init_done(); 1859 return; 1860 #endif 1861 1862 default: 1863 break; 1864 } 1865 hci_initializing_next_state(); 1866 } 1867 1868 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1869 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1870 bd_addr_t bd_address; 1871 (void)memcpy(&bd_address, conn->address, 6); 1872 1873 #ifdef ENABLE_CLASSIC 1874 // cache needed data 1875 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1876 #endif 1877 1878 // connection failed, remove entry 1879 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1880 btstack_memory_hci_connection_free( conn ); 1881 1882 #ifdef ENABLE_CLASSIC 1883 // notify client if dedicated bonding 1884 if (notify_dedicated_bonding_failed){ 1885 log_info("hci notify_dedicated_bonding_failed"); 1886 hci_emit_dedicated_bonding_result(bd_address, status); 1887 } 1888 1889 // if authentication error, also delete link key 1890 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1891 gap_drop_link_key_for_bd_addr(bd_address); 1892 } 1893 #endif 1894 } 1895 1896 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1897 // handle BT initialization 1898 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1899 hci_initializing_event_handler(packet, size); 1900 } 1901 1902 // help with BT sleep 1903 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1904 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1905 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1906 hci_initializing_next_state(); 1907 } 1908 } 1909 1910 static void event_handler(uint8_t *packet, int size){ 1911 1912 uint16_t event_length = packet[1]; 1913 1914 // assert packet is complete 1915 if (size != (event_length + 2)){ 1916 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1917 return; 1918 } 1919 1920 bd_addr_t addr; 1921 bd_addr_type_t addr_type; 1922 hci_con_handle_t handle; 1923 hci_connection_t * conn; 1924 int i; 1925 int create_connection_cmd; 1926 1927 #ifdef ENABLE_CLASSIC 1928 uint8_t link_type; 1929 #endif 1930 1931 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1932 1933 switch (hci_event_packet_get_type(packet)) { 1934 1935 case HCI_EVENT_COMMAND_COMPLETE: 1936 // get num cmd packets - limit to 1 to reduce complexity 1937 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1938 1939 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1940 if (packet[5]) break; 1941 // terminate, name 248 chars 1942 packet[6+248] = 0; 1943 log_info("local name: %s", &packet[6]); 1944 } 1945 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1946 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1947 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1948 uint16_t acl_len = little_endian_read_16(packet, 6); 1949 uint16_t sco_len = packet[8]; 1950 1951 // determine usable ACL/SCO payload size 1952 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1953 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1954 1955 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1956 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1957 1958 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1959 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1960 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1961 } 1962 } 1963 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1964 if (packet[5] == 0){ 1965 uint8_t event[5]; 1966 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1967 event[1] = 3; 1968 (void)memcpy(&event[2], &packet[6], 3); 1969 hci_emit_event(event, sizeof(event), 1); 1970 } 1971 } 1972 #ifdef ENABLE_BLE 1973 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1974 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1975 hci_stack->le_acl_packets_total_num = packet[8]; 1976 // determine usable ACL payload size 1977 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1978 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1979 } 1980 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1981 } 1982 #endif 1983 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1984 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1985 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1986 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1987 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); 1988 } 1989 #endif 1990 #ifdef ENABLE_LE_CENTRAL 1991 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1992 hci_stack->le_whitelist_capacity = packet[6]; 1993 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1994 } 1995 #endif 1996 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1997 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1998 hci_stack->local_bd_addr); 1999 log_info("Local Address, Status: 0x%02x: Addr: %s", 2000 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2001 #ifdef ENABLE_CLASSIC 2002 if (hci_stack->link_key_db){ 2003 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2004 } 2005 #endif 2006 } 2007 #ifdef ENABLE_CLASSIC 2008 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2009 hci_emit_discoverable_enabled(hci_stack->discoverable); 2010 } 2011 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2012 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2013 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2014 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2015 hci_emit_event(event, sizeof(event), 1); 2016 } 2017 } 2018 #endif 2019 2020 // Note: HCI init checks 2021 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2022 (void)memcpy(hci_stack->local_supported_features, 2023 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2024 8); 2025 2026 #ifdef ENABLE_CLASSIC 2027 // determine usable ACL packet types based on host buffer size and supported features 2028 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2029 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2030 #endif 2031 // Classic/LE 2032 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2033 } 2034 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2035 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2036 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2037 uint16_t manufacturer = little_endian_read_16(packet, 10); 2038 // map Cypress to Broadcom 2039 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2040 log_info("Treat Cypress as Broadcom"); 2041 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2042 little_endian_store_16(packet, 10, manufacturer); 2043 } 2044 hci_stack->manufacturer = manufacturer; 2045 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2046 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2047 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2048 } 2049 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2050 hci_stack->local_supported_commands[0] = 2051 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2052 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2053 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2054 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2055 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2056 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2057 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2058 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2059 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2060 } 2061 #ifdef ENABLE_CLASSIC 2062 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2063 if (packet[5] == 0){ 2064 hci_stack->synchronous_flow_control_enabled = 1; 2065 } 2066 } 2067 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2068 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2069 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2070 conn = hci_connection_for_handle(handle); 2071 if (!conn) break; 2072 if (status == 0){ 2073 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2074 log_info("Handle %x04x key Size: %u", handle, key_size); 2075 conn->encryption_key_size = key_size; 2076 } else { 2077 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2078 conn->encryption_key_size = 1; 2079 } 2080 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2081 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2082 } 2083 #endif 2084 break; 2085 2086 case HCI_EVENT_COMMAND_STATUS: 2087 // get num cmd packets - limit to 1 to reduce complexity 2088 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2089 2090 // check command status to detected failed outgoing connections 2091 create_connection_cmd = 0; 2092 #ifdef ENABLE_CLASSIC 2093 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2094 create_connection_cmd = 1; 2095 } 2096 #endif 2097 #ifdef ENABLE_LE_CENTRAL 2098 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2099 create_connection_cmd = 1; 2100 } 2101 #endif 2102 if (create_connection_cmd) { 2103 uint8_t status = hci_event_command_status_get_status(packet); 2104 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2105 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); 2106 2107 // reset outgoing address info 2108 memset(hci_stack->outgoing_addr, 0, 6); 2109 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2110 2111 // error => outgoing connection failed 2112 if ((conn != NULL) && (status != 0)){ 2113 hci_handle_connection_failed(conn, status); 2114 } 2115 } 2116 break; 2117 2118 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2119 if (size < 3) return; 2120 uint16_t num_handles = packet[2]; 2121 if (size != (3 + num_handles * 4)) return; 2122 uint16_t offset = 3; 2123 for (i=0; i<num_handles;i++){ 2124 handle = little_endian_read_16(packet, offset) & 0x0fff; 2125 offset += 2; 2126 uint16_t num_packets = little_endian_read_16(packet, offset); 2127 offset += 2; 2128 2129 conn = hci_connection_for_handle(handle); 2130 if (!conn){ 2131 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2132 continue; 2133 } 2134 2135 if (conn->num_packets_sent >= num_packets){ 2136 conn->num_packets_sent -= num_packets; 2137 } else { 2138 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2139 conn->num_packets_sent = 0; 2140 } 2141 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2142 2143 #ifdef ENABLE_CLASSIC 2144 // For SCO, we do the can_send_now_check here 2145 hci_notify_if_sco_can_send_now(); 2146 #endif 2147 } 2148 break; 2149 } 2150 2151 #ifdef ENABLE_CLASSIC 2152 case HCI_EVENT_INQUIRY_COMPLETE: 2153 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2154 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2155 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2156 hci_emit_event(event, sizeof(event), 1); 2157 } 2158 break; 2159 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2160 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2161 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2162 } 2163 break; 2164 case HCI_EVENT_CONNECTION_REQUEST: 2165 reverse_bd_addr(&packet[2], addr); 2166 if (hci_stack->gap_classic_accept_callback != NULL){ 2167 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2168 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2169 bd_addr_copy(hci_stack->decline_addr, addr); 2170 break; 2171 } 2172 } 2173 2174 // TODO: eval COD 8-10 2175 link_type = packet[11]; 2176 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2177 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2178 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2179 if (!conn) { 2180 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2181 } 2182 if (!conn) { 2183 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2184 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2185 bd_addr_copy(hci_stack->decline_addr, addr); 2186 break; 2187 } 2188 conn->role = HCI_ROLE_SLAVE; 2189 conn->state = RECEIVED_CONNECTION_REQUEST; 2190 // store info about eSCO 2191 if (link_type == 0x02){ 2192 conn->remote_supported_feature_eSCO = 1; 2193 } 2194 hci_run(); 2195 break; 2196 2197 case HCI_EVENT_CONNECTION_COMPLETE: 2198 // Connection management 2199 reverse_bd_addr(&packet[5], addr); 2200 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2201 addr_type = BD_ADDR_TYPE_ACL; 2202 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2203 if (conn) { 2204 if (!packet[2]){ 2205 conn->state = OPEN; 2206 conn->con_handle = little_endian_read_16(packet, 3); 2207 2208 // queue get remote feature 2209 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2210 2211 // queue set supervision timeout if we're master 2212 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2213 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2214 } 2215 2216 // restart timer 2217 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2218 btstack_run_loop_add_timer(&conn->timeout); 2219 2220 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2221 2222 hci_emit_nr_connections_changed(); 2223 } else { 2224 // connection failed 2225 hci_handle_connection_failed(conn, packet[2]); 2226 } 2227 } 2228 break; 2229 2230 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2231 reverse_bd_addr(&packet[5], addr); 2232 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2233 if (packet[2]){ 2234 // connection failed 2235 break; 2236 } 2237 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2238 if (!conn) { 2239 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2240 } 2241 if (!conn) { 2242 break; 2243 } 2244 conn->state = OPEN; 2245 conn->con_handle = little_endian_read_16(packet, 3); 2246 2247 #ifdef ENABLE_SCO_OVER_HCI 2248 // update SCO 2249 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2250 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2251 } 2252 // trigger can send now 2253 if (hci_have_usb_transport()){ 2254 hci_stack->sco_can_send_now = 1; 2255 } 2256 #endif 2257 break; 2258 2259 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2260 handle = little_endian_read_16(packet, 3); 2261 conn = hci_connection_for_handle(handle); 2262 if (!conn) break; 2263 if (!packet[2]){ 2264 uint8_t * features = &packet[5]; 2265 if (features[6] & (1 << 3)){ 2266 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2267 } 2268 if (features[3] & (1<<7)){ 2269 conn->remote_supported_feature_eSCO = 1; 2270 } 2271 } 2272 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2273 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2274 if (conn->bonding_flags & BONDING_DEDICATED){ 2275 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2276 } 2277 break; 2278 2279 case HCI_EVENT_LINK_KEY_REQUEST: 2280 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2281 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2282 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2283 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2284 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2285 hci_run(); 2286 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2287 return; 2288 2289 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2290 reverse_bd_addr(&packet[2], addr); 2291 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2292 if (!conn) break; 2293 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2294 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2295 // Change Connection Encryption keeps link key type 2296 if (link_key_type != CHANGED_COMBINATION_KEY){ 2297 conn->link_key_type = link_key_type; 2298 } 2299 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2300 // still forward event to allow dismiss of pairing dialog 2301 break; 2302 } 2303 2304 case HCI_EVENT_PIN_CODE_REQUEST: 2305 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2306 // non-bondable mode: pin code negative reply will be sent 2307 if (!hci_stack->bondable){ 2308 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2309 hci_run(); 2310 return; 2311 } 2312 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2313 if (!hci_stack->link_key_db) break; 2314 hci_event_pin_code_request_get_bd_addr(packet, addr); 2315 hci_stack->link_key_db->delete_link_key(addr); 2316 break; 2317 2318 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2319 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2320 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2321 break; 2322 2323 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2324 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2325 if (!hci_stack->ssp_auto_accept) break; 2326 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2327 break; 2328 2329 case HCI_EVENT_USER_PASSKEY_REQUEST: 2330 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2331 if (!hci_stack->ssp_auto_accept) break; 2332 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2333 break; 2334 case HCI_EVENT_MODE_CHANGE: 2335 handle = hci_event_mode_change_get_handle(packet); 2336 conn = hci_connection_for_handle(handle); 2337 if (!conn) break; 2338 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2339 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2340 break; 2341 #endif 2342 2343 case HCI_EVENT_ENCRYPTION_CHANGE: 2344 handle = little_endian_read_16(packet, 3); 2345 conn = hci_connection_for_handle(handle); 2346 if (!conn) break; 2347 if (packet[2] == 0) { 2348 if (packet[5]){ 2349 if (hci_is_le_connection(conn)){ 2350 // For LE, we accept connection as encrypted 2351 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2352 } 2353 #ifdef ENABLE_CLASSIC 2354 else { 2355 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2356 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2357 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2358 } else { 2359 // if not, pretend everything is perfect 2360 conn->encryption_key_size = 16; 2361 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2362 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2363 } 2364 } 2365 #endif 2366 } else { 2367 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2368 } 2369 } 2370 2371 break; 2372 2373 #ifdef ENABLE_CLASSIC 2374 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2375 handle = little_endian_read_16(packet, 3); 2376 conn = hci_connection_for_handle(handle); 2377 if (!conn) break; 2378 2379 // dedicated bonding: send result and disconnect 2380 if (conn->bonding_flags & BONDING_DEDICATED){ 2381 conn->bonding_flags &= ~BONDING_DEDICATED; 2382 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2383 conn->bonding_status = packet[2]; 2384 break; 2385 } 2386 2387 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2388 // link key sufficient for requested security 2389 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2390 break; 2391 } 2392 // not enough 2393 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2394 break; 2395 #endif 2396 2397 // HCI_EVENT_DISCONNECTION_COMPLETE 2398 // has been split, to first notify stack before shutting connection down 2399 // see end of function, too. 2400 case HCI_EVENT_DISCONNECTION_COMPLETE: 2401 if (packet[2]) break; // status != 0 2402 handle = little_endian_read_16(packet, 3); 2403 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2404 if (hci_stack->acl_fragmentation_total_size > 0) { 2405 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2406 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2407 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2408 hci_stack->acl_fragmentation_total_size = 0; 2409 hci_stack->acl_fragmentation_pos = 0; 2410 if (release_buffer){ 2411 hci_release_packet_buffer(); 2412 } 2413 } 2414 } 2415 2416 conn = hci_connection_for_handle(handle); 2417 if (!conn) break; 2418 // mark connection for shutdown 2419 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2420 2421 // emit dedicatd bonding event 2422 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2423 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2424 } 2425 2426 #ifdef ENABLE_BLE 2427 #ifdef ENABLE_LE_PERIPHERAL 2428 // re-enable advertisements for le connections if active 2429 if (hci_is_le_connection(conn)){ 2430 hci_reenable_advertisements_if_needed(); 2431 } 2432 #endif 2433 #endif 2434 break; 2435 2436 case HCI_EVENT_HARDWARE_ERROR: 2437 log_error("Hardware Error: 0x%02x", packet[2]); 2438 if (hci_stack->hardware_error_callback){ 2439 (*hci_stack->hardware_error_callback)(packet[2]); 2440 } else { 2441 // if no special requests, just reboot stack 2442 hci_power_control_off(); 2443 hci_power_control_on(); 2444 } 2445 break; 2446 2447 #ifdef ENABLE_CLASSIC 2448 case HCI_EVENT_ROLE_CHANGE: 2449 if (packet[2]) break; // status != 0 2450 reverse_bd_addr(&packet[3], addr); 2451 addr_type = BD_ADDR_TYPE_ACL; 2452 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2453 if (!conn) break; 2454 conn->role = packet[9]; 2455 break; 2456 #endif 2457 2458 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2459 // release packet buffer only for asynchronous transport and if there are not further fragements 2460 if (hci_transport_synchronous()) { 2461 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2462 return; // instead of break: to avoid re-entering hci_run() 2463 } 2464 hci_stack->acl_fragmentation_tx_active = 0; 2465 if (hci_stack->acl_fragmentation_total_size) break; 2466 hci_release_packet_buffer(); 2467 2468 // L2CAP receives this event via the hci_emit_event below 2469 2470 #ifdef ENABLE_CLASSIC 2471 // For SCO, we do the can_send_now_check here 2472 hci_notify_if_sco_can_send_now(); 2473 #endif 2474 break; 2475 2476 #ifdef ENABLE_CLASSIC 2477 case HCI_EVENT_SCO_CAN_SEND_NOW: 2478 // For SCO, we do the can_send_now_check here 2479 hci_stack->sco_can_send_now = 1; 2480 hci_notify_if_sco_can_send_now(); 2481 return; 2482 2483 // explode inquriy results for easier consumption 2484 case HCI_EVENT_INQUIRY_RESULT: 2485 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2486 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2487 gap_inquiry_explode(packet, size); 2488 break; 2489 #endif 2490 2491 #ifdef ENABLE_BLE 2492 case HCI_EVENT_LE_META: 2493 switch (packet[2]){ 2494 #ifdef ENABLE_LE_CENTRAL 2495 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2496 // log_info("advertising report received"); 2497 if (!hci_stack->le_scanning_enabled) break; 2498 le_handle_advertisement_report(packet, size); 2499 break; 2500 #endif 2501 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2502 // Connection management 2503 reverse_bd_addr(&packet[8], addr); 2504 addr_type = (bd_addr_type_t)packet[7]; 2505 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2506 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2507 2508 #ifdef ENABLE_LE_CENTRAL 2509 // if auto-connect, remove from whitelist in both roles 2510 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2511 hci_remove_from_whitelist(addr_type, addr); 2512 } 2513 // handle error: error is reported only to the initiator -> outgoing connection 2514 if (packet[3]){ 2515 2516 // handle cancelled outgoing connection 2517 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2518 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2519 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2520 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2521 conn = gap_get_outgoing_connection(); 2522 } 2523 2524 // outgoing connection establishment is done 2525 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2526 // remove entry 2527 if (conn){ 2528 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2529 btstack_memory_hci_connection_free( conn ); 2530 } 2531 break; 2532 } 2533 #endif 2534 // on success, both hosts receive connection complete event 2535 if (packet[6] == HCI_ROLE_MASTER){ 2536 #ifdef ENABLE_LE_CENTRAL 2537 // if we're master, it was an outgoing connection and we're done with it 2538 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2539 #endif 2540 } else { 2541 #ifdef ENABLE_LE_PERIPHERAL 2542 // if we're slave, it was an incoming connection, advertisements have stopped 2543 hci_stack->le_advertisements_active = 0; 2544 #endif 2545 } 2546 // LE connections are auto-accepted, so just create a connection if there isn't one already 2547 if (!conn){ 2548 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2549 } 2550 // no memory, sorry. 2551 if (!conn){ 2552 break; 2553 } 2554 2555 conn->state = OPEN; 2556 conn->role = packet[6]; 2557 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2558 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2559 2560 #ifdef ENABLE_LE_PERIPHERAL 2561 if (packet[6] == HCI_ROLE_SLAVE){ 2562 hci_reenable_advertisements_if_needed(); 2563 } 2564 #endif 2565 2566 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2567 2568 // restart timer 2569 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2570 // btstack_run_loop_add_timer(&conn->timeout); 2571 2572 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2573 2574 hci_emit_nr_connections_changed(); 2575 break; 2576 2577 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2578 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2579 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2580 conn = hci_connection_for_handle(handle); 2581 if (!conn) break; 2582 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2583 break; 2584 2585 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2586 // connection 2587 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2588 conn = hci_connection_for_handle(handle); 2589 if (conn) { 2590 // read arguments 2591 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2592 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2593 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2594 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2595 2596 // validate against current connection parameter range 2597 le_connection_parameter_range_t existing_range; 2598 gap_get_connection_parameter_range(&existing_range); 2599 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2600 if (update_parameter){ 2601 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2602 conn->le_conn_interval_min = le_conn_interval_min; 2603 conn->le_conn_interval_max = le_conn_interval_max; 2604 conn->le_conn_latency = le_conn_latency; 2605 conn->le_supervision_timeout = le_supervision_timeout; 2606 } else { 2607 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2608 } 2609 } 2610 break; 2611 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2612 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2613 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2614 conn = hci_connection_for_handle(handle); 2615 if (conn) { 2616 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2617 } 2618 break; 2619 #endif 2620 default: 2621 break; 2622 } 2623 break; 2624 #endif 2625 case HCI_EVENT_VENDOR_SPECIFIC: 2626 // Vendor specific commands often create vendor specific event instead of num completed packets 2627 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2628 switch (hci_stack->manufacturer){ 2629 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2630 hci_stack->num_cmd_packets = 1; 2631 break; 2632 default: 2633 break; 2634 } 2635 break; 2636 default: 2637 break; 2638 } 2639 2640 handle_event_for_current_stack_state(packet, size); 2641 2642 // notify upper stack 2643 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2644 2645 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2646 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2647 if (!packet[2]){ 2648 handle = little_endian_read_16(packet, 3); 2649 hci_connection_t * aConn = hci_connection_for_handle(handle); 2650 if (aConn) { 2651 // discard connection if app did not trigger a reconnect in the event handler 2652 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2653 hci_shutdown_connection(aConn); 2654 } 2655 } 2656 } 2657 } 2658 2659 // execute main loop 2660 hci_run(); 2661 } 2662 2663 #ifdef ENABLE_CLASSIC 2664 2665 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2666 static void sco_schedule_tx(hci_connection_t * conn); 2667 2668 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2669 log_debug("SCO TX Timeout"); 2670 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2671 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2672 if (!conn) return; 2673 2674 // trigger send 2675 conn->sco_tx_ready = 1; 2676 // extra packet if CVSD but SCO buffer is too short 2677 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2678 conn->sco_tx_ready++; 2679 } 2680 hci_notify_if_sco_can_send_now(); 2681 } 2682 2683 2684 #define SCO_TX_AFTER_RX_MS (6) 2685 2686 static void sco_schedule_tx(hci_connection_t * conn){ 2687 2688 uint32_t now = btstack_run_loop_get_time_ms(); 2689 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2690 int time_delta_ms = sco_tx_ms - now; 2691 2692 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2693 2694 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2695 btstack_run_loop_set_timer(timer, time_delta_ms); 2696 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2697 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2698 btstack_run_loop_add_timer(timer); 2699 } 2700 2701 static void sco_handler(uint8_t * packet, uint16_t size){ 2702 // lookup connection struct 2703 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2704 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2705 if (!conn) return; 2706 2707 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2708 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2709 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2710 packet[2] = 0x3c; 2711 memmove(&packet[3], &packet[23], 63); 2712 size = 63; 2713 } 2714 } 2715 2716 if (hci_have_usb_transport()){ 2717 // Nothing to do 2718 } else { 2719 // 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); 2720 if (hci_stack->synchronous_flow_control_enabled == 0){ 2721 uint32_t now = btstack_run_loop_get_time_ms(); 2722 2723 if (!conn->sco_rx_valid){ 2724 // ignore first 10 packets 2725 conn->sco_rx_count++; 2726 // log_debug("sco rx count %u", conn->sco_rx_count); 2727 if (conn->sco_rx_count == 10) { 2728 // use first timestamp as is and pretent it just started 2729 conn->sco_rx_ms = now; 2730 conn->sco_rx_valid = 1; 2731 conn->sco_rx_count = 0; 2732 sco_schedule_tx(conn); 2733 } 2734 } else { 2735 // track expected arrival timme 2736 conn->sco_rx_count++; 2737 conn->sco_rx_ms += 7; 2738 int delta = (int32_t) (now - conn->sco_rx_ms); 2739 if (delta > 0){ 2740 conn->sco_rx_ms++; 2741 } 2742 // log_debug("sco rx %u", conn->sco_rx_ms); 2743 sco_schedule_tx(conn); 2744 } 2745 } 2746 } 2747 // deliver to app 2748 if (hci_stack->sco_packet_handler) { 2749 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2750 } 2751 2752 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2753 conn->num_packets_completed++; 2754 hci_stack->host_completed_packets = 1; 2755 hci_run(); 2756 #endif 2757 } 2758 #endif 2759 2760 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2761 hci_dump_packet(packet_type, 1, packet, size); 2762 switch (packet_type) { 2763 case HCI_EVENT_PACKET: 2764 event_handler(packet, size); 2765 break; 2766 case HCI_ACL_DATA_PACKET: 2767 acl_handler(packet, size); 2768 break; 2769 #ifdef ENABLE_CLASSIC 2770 case HCI_SCO_DATA_PACKET: 2771 sco_handler(packet, size); 2772 break; 2773 #endif 2774 default: 2775 break; 2776 } 2777 } 2778 2779 /** 2780 * @brief Add event packet handler. 2781 */ 2782 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2783 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2784 } 2785 2786 2787 /** Register HCI packet handlers */ 2788 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2789 hci_stack->acl_packet_handler = handler; 2790 } 2791 2792 #ifdef ENABLE_CLASSIC 2793 /** 2794 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2795 */ 2796 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2797 hci_stack->sco_packet_handler = handler; 2798 } 2799 #endif 2800 2801 static void hci_state_reset(void){ 2802 // no connections yet 2803 hci_stack->connections = NULL; 2804 2805 // keep discoverable/connectable as this has been requested by the client(s) 2806 // hci_stack->discoverable = 0; 2807 // hci_stack->connectable = 0; 2808 // hci_stack->bondable = 1; 2809 // hci_stack->own_addr_type = 0; 2810 2811 // buffer is free 2812 hci_stack->hci_packet_buffer_reserved = 0; 2813 2814 // no pending cmds 2815 hci_stack->decline_reason = 0; 2816 hci_stack->new_scan_enable_value = 0xff; 2817 2818 // LE 2819 #ifdef ENABLE_BLE 2820 memset(hci_stack->le_random_address, 0, 6); 2821 hci_stack->le_random_address_set = 0; 2822 #endif 2823 #ifdef ENABLE_LE_CENTRAL 2824 hci_stack->le_scanning_active = 0; 2825 hci_stack->le_scan_type = 0xff; 2826 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2827 hci_stack->le_whitelist = 0; 2828 hci_stack->le_whitelist_capacity = 0; 2829 #endif 2830 } 2831 2832 #ifdef ENABLE_CLASSIC 2833 /** 2834 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2835 */ 2836 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2837 // store and open remote device db 2838 hci_stack->link_key_db = link_key_db; 2839 if (hci_stack->link_key_db) { 2840 hci_stack->link_key_db->open(); 2841 } 2842 } 2843 #endif 2844 2845 void hci_init(const hci_transport_t *transport, const void *config){ 2846 2847 #ifdef HAVE_MALLOC 2848 if (!hci_stack) { 2849 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2850 } 2851 #else 2852 hci_stack = &hci_stack_static; 2853 #endif 2854 memset(hci_stack, 0, sizeof(hci_stack_t)); 2855 2856 // reference to use transport layer implementation 2857 hci_stack->hci_transport = transport; 2858 2859 // reference to used config 2860 hci_stack->config = config; 2861 2862 // setup pointer for outgoing packet buffer 2863 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2864 2865 // max acl payload size defined in config.h 2866 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2867 2868 // register packet handlers with transport 2869 transport->register_packet_handler(&packet_handler); 2870 2871 hci_stack->state = HCI_STATE_OFF; 2872 2873 // class of device 2874 hci_stack->class_of_device = 0x007a020c; // Smartphone 2875 2876 // bondable by default 2877 hci_stack->bondable = 1; 2878 2879 #ifdef ENABLE_CLASSIC 2880 // classic name 2881 hci_stack->local_name = default_classic_name; 2882 2883 // Master slave policy 2884 hci_stack->master_slave_policy = 1; 2885 2886 // Allow Role Switch 2887 hci_stack->allow_role_switch = 1; 2888 2889 // Default / minimum security level = 2 2890 hci_stack->gap_security_level = LEVEL_2; 2891 2892 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2893 hci_stack->gap_required_encyrption_key_size = 16; 2894 #endif 2895 2896 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2897 hci_stack->ssp_enable = 1; 2898 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2899 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2900 hci_stack->ssp_auto_accept = 1; 2901 2902 // voice setting - signed 16 bit pcm data with CVSD over the air 2903 hci_stack->sco_voice_setting = 0x60; 2904 2905 #ifdef ENABLE_LE_CENTRAL 2906 // connection parameter to use for outgoing connections 2907 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2908 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2909 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2910 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2911 hci_stack->le_connection_latency = 4; // 4 2912 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2913 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2914 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2915 2916 // default LE Scanning 2917 hci_stack->le_scan_interval = 0x1e0; 2918 hci_stack->le_scan_window = 0x30; 2919 #endif 2920 2921 #ifdef ENABLE_LE_PERIPHERAL 2922 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2923 #endif 2924 2925 // connection parameter range used to answer connection parameter update requests in l2cap 2926 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2927 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2928 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2929 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2930 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2931 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2932 2933 hci_state_reset(); 2934 } 2935 2936 /** 2937 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2938 */ 2939 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2940 hci_stack->chipset = chipset_driver; 2941 2942 // reset chipset driver - init is also called on power_up 2943 if (hci_stack->chipset && hci_stack->chipset->init){ 2944 hci_stack->chipset->init(hci_stack->config); 2945 } 2946 } 2947 2948 /** 2949 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2950 */ 2951 void hci_set_control(const btstack_control_t *hardware_control){ 2952 // references to used control implementation 2953 hci_stack->control = hardware_control; 2954 // init with transport config 2955 hardware_control->init(hci_stack->config); 2956 } 2957 2958 void hci_close(void){ 2959 // close remote device db 2960 if (hci_stack->link_key_db) { 2961 hci_stack->link_key_db->close(); 2962 } 2963 2964 btstack_linked_list_iterator_t lit; 2965 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2966 while (btstack_linked_list_iterator_has_next(&lit)){ 2967 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2968 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2969 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2970 hci_shutdown_connection(connection); 2971 } 2972 2973 hci_power_control(HCI_POWER_OFF); 2974 2975 #ifdef HAVE_MALLOC 2976 free(hci_stack); 2977 #endif 2978 hci_stack = NULL; 2979 } 2980 2981 #ifdef ENABLE_CLASSIC 2982 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2983 // validate ranage and set 2984 if (encryption_key_size < 7) return; 2985 if (encryption_key_size > 16) return; 2986 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2987 } 2988 2989 void gap_set_security_level(gap_security_level_t security_level){ 2990 hci_stack->gap_security_level = security_level; 2991 } 2992 2993 gap_security_level_t gap_get_security_level(void){ 2994 return hci_stack->gap_security_level; 2995 } 2996 #endif 2997 2998 #ifdef ENABLE_CLASSIC 2999 void gap_set_class_of_device(uint32_t class_of_device){ 3000 hci_stack->class_of_device = class_of_device; 3001 } 3002 3003 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3004 hci_stack->default_link_policy_settings = default_link_policy_settings; 3005 } 3006 3007 void gap_set_allow_role_switch(bool allow_role_switch){ 3008 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3009 } 3010 3011 uint8_t hci_get_allow_role_switch(void){ 3012 return hci_stack->allow_role_switch; 3013 } 3014 3015 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3016 hci_stack->link_supervision_timeout = link_supervision_timeout; 3017 } 3018 3019 void hci_disable_l2cap_timeout_check(void){ 3020 disable_l2cap_timeouts = 1; 3021 } 3022 #endif 3023 3024 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3025 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3026 void hci_set_bd_addr(bd_addr_t addr){ 3027 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3028 hci_stack->custom_bd_addr_set = 1; 3029 } 3030 #endif 3031 3032 // State-Module-Driver overview 3033 // state module low-level 3034 // HCI_STATE_OFF off close 3035 // HCI_STATE_INITIALIZING, on open 3036 // HCI_STATE_WORKING, on open 3037 // HCI_STATE_HALTING, on open 3038 // HCI_STATE_SLEEPING, off/sleep close 3039 // HCI_STATE_FALLING_ASLEEP on open 3040 3041 static int hci_power_control_on(void){ 3042 3043 // power on 3044 int err = 0; 3045 if (hci_stack->control && hci_stack->control->on){ 3046 err = (*hci_stack->control->on)(); 3047 } 3048 if (err){ 3049 log_error( "POWER_ON failed"); 3050 hci_emit_hci_open_failed(); 3051 return err; 3052 } 3053 3054 // int chipset driver 3055 if (hci_stack->chipset && hci_stack->chipset->init){ 3056 hci_stack->chipset->init(hci_stack->config); 3057 } 3058 3059 // init transport 3060 if (hci_stack->hci_transport->init){ 3061 hci_stack->hci_transport->init(hci_stack->config); 3062 } 3063 3064 // open transport 3065 err = hci_stack->hci_transport->open(); 3066 if (err){ 3067 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3068 if (hci_stack->control && hci_stack->control->off){ 3069 (*hci_stack->control->off)(); 3070 } 3071 hci_emit_hci_open_failed(); 3072 return err; 3073 } 3074 return 0; 3075 } 3076 3077 static void hci_power_control_off(void){ 3078 3079 log_info("hci_power_control_off"); 3080 3081 // close low-level device 3082 hci_stack->hci_transport->close(); 3083 3084 log_info("hci_power_control_off - hci_transport closed"); 3085 3086 // power off 3087 if (hci_stack->control && hci_stack->control->off){ 3088 (*hci_stack->control->off)(); 3089 } 3090 3091 log_info("hci_power_control_off - control closed"); 3092 3093 hci_stack->state = HCI_STATE_OFF; 3094 } 3095 3096 static void hci_power_control_sleep(void){ 3097 3098 log_info("hci_power_control_sleep"); 3099 3100 #if 0 3101 // don't close serial port during sleep 3102 3103 // close low-level device 3104 hci_stack->hci_transport->close(hci_stack->config); 3105 #endif 3106 3107 // sleep mode 3108 if (hci_stack->control && hci_stack->control->sleep){ 3109 (*hci_stack->control->sleep)(); 3110 } 3111 3112 hci_stack->state = HCI_STATE_SLEEPING; 3113 } 3114 3115 static int hci_power_control_wake(void){ 3116 3117 log_info("hci_power_control_wake"); 3118 3119 // wake on 3120 if (hci_stack->control && hci_stack->control->wake){ 3121 (*hci_stack->control->wake)(); 3122 } 3123 3124 #if 0 3125 // open low-level device 3126 int err = hci_stack->hci_transport->open(hci_stack->config); 3127 if (err){ 3128 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3129 if (hci_stack->control && hci_stack->control->off){ 3130 (*hci_stack->control->off)(); 3131 } 3132 hci_emit_hci_open_failed(); 3133 return err; 3134 } 3135 #endif 3136 3137 return 0; 3138 } 3139 3140 static void hci_power_transition_to_initializing(void){ 3141 // set up state machine 3142 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3143 hci_stack->hci_packet_buffer_reserved = 0; 3144 hci_stack->state = HCI_STATE_INITIALIZING; 3145 hci_stack->substate = HCI_INIT_SEND_RESET; 3146 } 3147 3148 int hci_power_control(HCI_POWER_MODE power_mode){ 3149 3150 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3151 3152 int err = 0; 3153 switch (hci_stack->state){ 3154 3155 case HCI_STATE_OFF: 3156 switch (power_mode){ 3157 case HCI_POWER_ON: 3158 err = hci_power_control_on(); 3159 if (err) { 3160 log_error("hci_power_control_on() error %d", err); 3161 return err; 3162 } 3163 hci_power_transition_to_initializing(); 3164 break; 3165 case HCI_POWER_OFF: 3166 // do nothing 3167 break; 3168 case HCI_POWER_SLEEP: 3169 // do nothing (with SLEEP == OFF) 3170 break; 3171 } 3172 break; 3173 3174 case HCI_STATE_INITIALIZING: 3175 switch (power_mode){ 3176 case HCI_POWER_ON: 3177 // do nothing 3178 break; 3179 case HCI_POWER_OFF: 3180 // no connections yet, just turn it off 3181 hci_power_control_off(); 3182 break; 3183 case HCI_POWER_SLEEP: 3184 // no connections yet, just turn it off 3185 hci_power_control_sleep(); 3186 break; 3187 } 3188 break; 3189 3190 case HCI_STATE_WORKING: 3191 switch (power_mode){ 3192 case HCI_POWER_ON: 3193 // do nothing 3194 break; 3195 case HCI_POWER_OFF: 3196 // see hci_run 3197 hci_stack->state = HCI_STATE_HALTING; 3198 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3199 break; 3200 case HCI_POWER_SLEEP: 3201 // see hci_run 3202 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3203 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3204 break; 3205 } 3206 break; 3207 3208 case HCI_STATE_HALTING: 3209 switch (power_mode){ 3210 case HCI_POWER_ON: 3211 hci_power_transition_to_initializing(); 3212 break; 3213 case HCI_POWER_OFF: 3214 // do nothing 3215 break; 3216 case HCI_POWER_SLEEP: 3217 // see hci_run 3218 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3219 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3220 break; 3221 } 3222 break; 3223 3224 case HCI_STATE_FALLING_ASLEEP: 3225 switch (power_mode){ 3226 case HCI_POWER_ON: 3227 3228 #ifdef HAVE_PLATFORM_IPHONE_OS 3229 // nothing to do, if H4 supports power management 3230 if (btstack_control_iphone_power_management_enabled()){ 3231 hci_stack->state = HCI_STATE_INITIALIZING; 3232 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3233 break; 3234 } 3235 #endif 3236 hci_power_transition_to_initializing(); 3237 break; 3238 case HCI_POWER_OFF: 3239 // see hci_run 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 case HCI_STATE_SLEEPING: 3250 switch (power_mode){ 3251 case HCI_POWER_ON: 3252 3253 #ifdef HAVE_PLATFORM_IPHONE_OS 3254 // nothing to do, if H4 supports power management 3255 if (btstack_control_iphone_power_management_enabled()){ 3256 hci_stack->state = HCI_STATE_INITIALIZING; 3257 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3258 hci_update_scan_enable(); 3259 break; 3260 } 3261 #endif 3262 err = hci_power_control_wake(); 3263 if (err) return err; 3264 hci_power_transition_to_initializing(); 3265 break; 3266 case HCI_POWER_OFF: 3267 hci_stack->state = HCI_STATE_HALTING; 3268 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3269 break; 3270 case HCI_POWER_SLEEP: 3271 // do nothing 3272 break; 3273 } 3274 break; 3275 } 3276 3277 // create internal event 3278 hci_emit_state(); 3279 3280 // trigger next/first action 3281 hci_run(); 3282 3283 return 0; 3284 } 3285 3286 3287 #ifdef ENABLE_CLASSIC 3288 3289 static void hci_update_scan_enable(void){ 3290 // 2 = page scan, 1 = inq scan 3291 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3292 hci_run(); 3293 } 3294 3295 void gap_discoverable_control(uint8_t enable){ 3296 if (enable) enable = 1; // normalize argument 3297 3298 if (hci_stack->discoverable == enable){ 3299 hci_emit_discoverable_enabled(hci_stack->discoverable); 3300 return; 3301 } 3302 3303 hci_stack->discoverable = enable; 3304 hci_update_scan_enable(); 3305 } 3306 3307 void gap_connectable_control(uint8_t enable){ 3308 if (enable) enable = 1; // normalize argument 3309 3310 // don't emit event 3311 if (hci_stack->connectable == enable) return; 3312 3313 hci_stack->connectable = enable; 3314 hci_update_scan_enable(); 3315 } 3316 #endif 3317 3318 void gap_local_bd_addr(bd_addr_t address_buffer){ 3319 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3320 } 3321 3322 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3323 static void hci_host_num_completed_packets(void){ 3324 3325 // create packet manually as arrays are not supported and num_commands should not get reduced 3326 hci_reserve_packet_buffer(); 3327 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3328 3329 uint16_t size = 0; 3330 uint16_t num_handles = 0; 3331 packet[size++] = 0x35; 3332 packet[size++] = 0x0c; 3333 size++; // skip param len 3334 size++; // skip num handles 3335 3336 // add { handle, packets } entries 3337 btstack_linked_item_t * it; 3338 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3339 hci_connection_t * connection = (hci_connection_t *) it; 3340 if (connection->num_packets_completed){ 3341 little_endian_store_16(packet, size, connection->con_handle); 3342 size += 2; 3343 little_endian_store_16(packet, size, connection->num_packets_completed); 3344 size += 2; 3345 // 3346 num_handles++; 3347 connection->num_packets_completed = 0; 3348 } 3349 } 3350 3351 packet[2] = size - 3; 3352 packet[3] = num_handles; 3353 3354 hci_stack->host_completed_packets = 0; 3355 3356 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3357 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3358 3359 // release packet buffer for synchronous transport implementations 3360 if (hci_transport_synchronous()){ 3361 hci_release_packet_buffer(); 3362 hci_emit_transport_packet_sent(); 3363 } 3364 } 3365 #endif 3366 3367 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3368 UNUSED(ds); 3369 hci_stack->substate = HCI_HALTING_CLOSE; 3370 // allow packet handlers to defer final shutdown 3371 hci_emit_state(); 3372 hci_run(); 3373 } 3374 3375 static bool hci_run_acl_fragments(void){ 3376 if (hci_stack->acl_fragmentation_total_size > 0) { 3377 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3378 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3379 if (connection) { 3380 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3381 hci_send_acl_packet_fragments(connection); 3382 return true; 3383 } 3384 } else { 3385 // connection gone -> discard further fragments 3386 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3387 hci_stack->acl_fragmentation_total_size = 0; 3388 hci_stack->acl_fragmentation_pos = 0; 3389 } 3390 } 3391 return false; 3392 } 3393 3394 #ifdef ENABLE_CLASSIC 3395 static bool hci_run_general_gap_classic(void){ 3396 3397 // decline incoming connections 3398 if (hci_stack->decline_reason){ 3399 uint8_t reason = hci_stack->decline_reason; 3400 hci_stack->decline_reason = 0; 3401 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3402 return true; 3403 } 3404 // send scan enable 3405 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3406 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3407 hci_stack->new_scan_enable_value = 0xff; 3408 return true; 3409 } 3410 // start/stop inquiry 3411 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3412 uint8_t duration = hci_stack->inquiry_state; 3413 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3414 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3415 return true; 3416 } 3417 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3418 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3419 hci_send_cmd(&hci_inquiry_cancel); 3420 return true; 3421 } 3422 // remote name request 3423 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3424 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3425 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3426 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3427 return true; 3428 } 3429 // pairing 3430 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3431 uint8_t state = hci_stack->gap_pairing_state; 3432 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3433 switch (state){ 3434 case GAP_PAIRING_STATE_SEND_PIN: 3435 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); 3436 break; 3437 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3438 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3439 break; 3440 case GAP_PAIRING_STATE_SEND_PASSKEY: 3441 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3442 break; 3443 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3444 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3445 break; 3446 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3447 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3448 break; 3449 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3450 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3451 break; 3452 default: 3453 break; 3454 } 3455 return true; 3456 } 3457 return false; 3458 } 3459 #endif 3460 3461 #ifdef ENABLE_BLE 3462 static bool hci_run_general_gap_le(void){ 3463 3464 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3465 3466 if (hci_stack->state != HCI_STATE_WORKING) return false; 3467 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3468 3469 #ifdef ENABLE_LE_CENTRAL 3470 // parameter change requires scanning to be stopped first 3471 if (hci_stack->le_scan_type != 0xff) { 3472 if (hci_stack->le_scanning_active){ 3473 hci_stack->le_scanning_active = 0; 3474 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3475 } else { 3476 int scan_type = (int) hci_stack->le_scan_type; 3477 hci_stack->le_scan_type = 0xff; 3478 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); 3479 } 3480 return true; 3481 } 3482 // finally, we can enable/disable le scan 3483 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3484 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3485 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3486 return true; 3487 } 3488 #endif 3489 #ifdef ENABLE_LE_PERIPHERAL 3490 // le advertisement control 3491 if (hci_stack->le_advertisements_todo){ 3492 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3493 } 3494 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3495 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3496 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3497 return true; 3498 } 3499 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3500 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3501 hci_send_cmd(&hci_le_set_advertising_parameters, 3502 hci_stack->le_advertisements_interval_min, 3503 hci_stack->le_advertisements_interval_max, 3504 hci_stack->le_advertisements_type, 3505 hci_stack->le_own_addr_type, 3506 hci_stack->le_advertisements_direct_address_type, 3507 hci_stack->le_advertisements_direct_address, 3508 hci_stack->le_advertisements_channel_map, 3509 hci_stack->le_advertisements_filter_policy); 3510 return true; 3511 } 3512 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3513 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3514 uint8_t adv_data_clean[31]; 3515 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3516 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3517 hci_stack->le_advertisements_data_len); 3518 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3519 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3520 return true; 3521 } 3522 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3523 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3524 uint8_t scan_data_clean[31]; 3525 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3526 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3527 hci_stack->le_scan_response_data_len); 3528 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3529 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3530 return true; 3531 } 3532 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3533 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3534 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3535 return true; 3536 } 3537 #endif 3538 3539 #ifdef ENABLE_LE_CENTRAL 3540 // 3541 // LE Whitelist Management 3542 // 3543 3544 // check if whitelist needs modification 3545 btstack_linked_list_iterator_t lit; 3546 int modification_pending = 0; 3547 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3548 while (btstack_linked_list_iterator_has_next(&lit)){ 3549 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3550 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3551 modification_pending = 1; 3552 break; 3553 } 3554 } 3555 3556 if (modification_pending){ 3557 // stop connnecting if modification pending 3558 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3559 hci_send_cmd(&hci_le_create_connection_cancel); 3560 return true; 3561 } 3562 3563 // add/remove entries 3564 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3565 while (btstack_linked_list_iterator_has_next(&lit)){ 3566 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3567 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3568 entry->state = LE_WHITELIST_ON_CONTROLLER; 3569 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3570 return true; 3571 } 3572 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3573 bd_addr_t address; 3574 bd_addr_type_t address_type = entry->address_type; 3575 (void)memcpy(address, entry->address, 6); 3576 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3577 btstack_memory_whitelist_entry_free(entry); 3578 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3579 return true; 3580 } 3581 } 3582 } 3583 3584 // start connecting 3585 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3586 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3587 bd_addr_t null_addr; 3588 memset(null_addr, 0, 6); 3589 hci_send_cmd(&hci_le_create_connection, 3590 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3591 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3592 1, // use whitelist 3593 0, // peer address type 3594 null_addr, // peer bd addr 3595 hci_stack->le_own_addr_type, // our addr type: 3596 hci_stack->le_connection_interval_min, // conn interval min 3597 hci_stack->le_connection_interval_max, // conn interval max 3598 hci_stack->le_connection_latency, // conn latency 3599 hci_stack->le_supervision_timeout, // conn latency 3600 hci_stack->le_minimum_ce_length, // min ce length 3601 hci_stack->le_maximum_ce_length // max ce length 3602 ); 3603 return true; 3604 } 3605 #endif 3606 return false; 3607 } 3608 #endif 3609 3610 static bool hci_run_general_pending_commmands(void){ 3611 btstack_linked_item_t * it; 3612 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3613 hci_connection_t * connection = (hci_connection_t *) it; 3614 3615 switch(connection->state){ 3616 case SEND_CREATE_CONNECTION: 3617 switch(connection->address_type){ 3618 #ifdef ENABLE_CLASSIC 3619 case BD_ADDR_TYPE_ACL: 3620 log_info("sending hci_create_connection"); 3621 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3622 break; 3623 #endif 3624 default: 3625 #ifdef ENABLE_BLE 3626 #ifdef ENABLE_LE_CENTRAL 3627 // track outgoing connection 3628 hci_stack->outgoing_addr_type = connection->address_type; 3629 (void)memcpy(hci_stack->outgoing_addr, 3630 connection->address, 6); 3631 log_info("sending hci_le_create_connection"); 3632 hci_send_cmd(&hci_le_create_connection, 3633 hci_stack->le_connection_scan_interval, // conn scan interval 3634 hci_stack->le_connection_scan_window, // conn scan windows 3635 0, // don't use whitelist 3636 connection->address_type, // peer address type 3637 connection->address, // peer bd addr 3638 hci_stack->le_own_addr_type, // our addr type: 3639 hci_stack->le_connection_interval_min, // conn interval min 3640 hci_stack->le_connection_interval_max, // conn interval max 3641 hci_stack->le_connection_latency, // conn latency 3642 hci_stack->le_supervision_timeout, // conn latency 3643 hci_stack->le_minimum_ce_length, // min ce length 3644 hci_stack->le_maximum_ce_length // max ce length 3645 ); 3646 connection->state = SENT_CREATE_CONNECTION; 3647 #endif 3648 #endif 3649 break; 3650 } 3651 return true; 3652 3653 #ifdef ENABLE_CLASSIC 3654 case RECEIVED_CONNECTION_REQUEST: 3655 connection->role = HCI_ROLE_SLAVE; 3656 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3657 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3658 connection->state = ACCEPTED_CONNECTION_REQUEST; 3659 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3660 } 3661 return true; 3662 #endif 3663 3664 #ifdef ENABLE_BLE 3665 #ifdef ENABLE_LE_CENTRAL 3666 case SEND_CANCEL_CONNECTION: 3667 connection->state = SENT_CANCEL_CONNECTION; 3668 hci_send_cmd(&hci_le_create_connection_cancel); 3669 return true; 3670 #endif 3671 #endif 3672 case SEND_DISCONNECT: 3673 connection->state = SENT_DISCONNECT; 3674 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3675 return true; 3676 3677 default: 3678 break; 3679 } 3680 3681 // no further commands if connection is about to get shut down 3682 if (connection->state == SENT_DISCONNECT) continue; 3683 3684 if (connection->authentication_flags & READ_RSSI){ 3685 connectionClearAuthenticationFlags(connection, READ_RSSI); 3686 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3687 return true; 3688 } 3689 3690 #ifdef ENABLE_CLASSIC 3691 3692 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3693 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3694 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3695 return true; 3696 } 3697 3698 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3699 log_info("responding to link key request"); 3700 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3701 link_key_t link_key; 3702 link_key_type_t link_key_type; 3703 if ( hci_stack->link_key_db 3704 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3705 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3706 connection->link_key_type = link_key_type; 3707 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3708 } else { 3709 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3710 } 3711 return true; 3712 } 3713 3714 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3715 log_info("denying to pin request"); 3716 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3717 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3718 return true; 3719 } 3720 3721 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3722 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3723 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3724 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3725 // tweak authentication requirements 3726 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3727 if (connection->bonding_flags & BONDING_DEDICATED){ 3728 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3729 } 3730 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3731 authreq |= 1; 3732 } 3733 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3734 } else { 3735 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3736 } 3737 return true; 3738 } 3739 3740 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3741 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3742 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3743 return true; 3744 } 3745 3746 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3747 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3748 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3749 return true; 3750 } 3751 3752 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3753 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3754 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3755 return true; 3756 } 3757 3758 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3759 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3760 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3761 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3762 return true; 3763 } 3764 3765 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3766 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3767 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3768 return true; 3769 } 3770 3771 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3772 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3773 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3774 return true; 3775 } 3776 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3777 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3778 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3779 return true; 3780 } 3781 #endif 3782 3783 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3784 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3785 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3786 return true; 3787 } 3788 3789 #ifdef ENABLE_CLASSIC 3790 uint16_t sniff_min_interval; 3791 switch (connection->sniff_min_interval){ 3792 case 0: 3793 break; 3794 case 0xffff: 3795 connection->sniff_min_interval = 0; 3796 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3797 return true; 3798 default: 3799 sniff_min_interval = connection->sniff_min_interval; 3800 connection->sniff_min_interval = 0; 3801 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3802 return true; 3803 } 3804 #endif 3805 3806 #ifdef ENABLE_BLE 3807 switch (connection->le_con_parameter_update_state){ 3808 // response to L2CAP CON PARAMETER UPDATE REQUEST 3809 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3810 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3811 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3812 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3813 0x0000, 0xffff); 3814 return true; 3815 case CON_PARAMETER_UPDATE_REPLY: 3816 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3817 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3818 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3819 0x0000, 0xffff); 3820 return true; 3821 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3822 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3823 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3824 return true; 3825 default: 3826 break; 3827 } 3828 if (connection->le_phy_update_all_phys != 0xff){ 3829 uint8_t all_phys = connection->le_phy_update_all_phys; 3830 connection->le_phy_update_all_phys = 0xff; 3831 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); 3832 return true; 3833 } 3834 #endif 3835 } 3836 return false; 3837 } 3838 3839 static void hci_run(void){ 3840 3841 bool done; 3842 3843 // send continuation fragments first, as they block the prepared packet buffer 3844 done = hci_run_acl_fragments(); 3845 if (done) return; 3846 3847 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3848 // send host num completed packets next as they don't require num_cmd_packets > 0 3849 if (!hci_can_send_comand_packet_transport()) return; 3850 if (hci_stack->host_completed_packets){ 3851 hci_host_num_completed_packets(); 3852 return; 3853 } 3854 #endif 3855 3856 if (!hci_can_send_command_packet_now()) return; 3857 3858 // global/non-connection oriented commands 3859 3860 3861 #ifdef ENABLE_CLASSIC 3862 // general gap classic 3863 done = hci_run_general_gap_classic(); 3864 if (done) return; 3865 #endif 3866 3867 #ifdef ENABLE_BLE 3868 // general gap le 3869 done = hci_run_general_gap_le(); 3870 if (done) return; 3871 #endif 3872 3873 // send pending HCI commands 3874 done = hci_run_general_pending_commmands(); 3875 if (done) return; 3876 3877 // stack state sub statemachines 3878 hci_connection_t * connection; 3879 switch (hci_stack->state){ 3880 case HCI_STATE_INITIALIZING: 3881 hci_initializing_run(); 3882 break; 3883 3884 case HCI_STATE_HALTING: 3885 3886 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3887 switch (hci_stack->substate){ 3888 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3889 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3890 3891 #ifdef ENABLE_BLE 3892 #ifdef ENABLE_LE_CENTRAL 3893 // free whitelist entries 3894 { 3895 btstack_linked_list_iterator_t lit; 3896 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3897 while (btstack_linked_list_iterator_has_next(&lit)){ 3898 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3899 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3900 btstack_memory_whitelist_entry_free(entry); 3901 } 3902 } 3903 #endif 3904 #endif 3905 // close all open connections 3906 connection = (hci_connection_t *) hci_stack->connections; 3907 if (connection){ 3908 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3909 if (!hci_can_send_command_packet_now()) return; 3910 3911 // check state 3912 if (connection->state == SENT_DISCONNECT) return; 3913 connection->state = SENT_DISCONNECT; 3914 3915 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3916 3917 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3918 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3919 3920 // ... which would be ignored anyway as we shutdown (free) the connection now 3921 hci_shutdown_connection(connection); 3922 3923 // finally, send the disconnect command 3924 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3925 return; 3926 } 3927 3928 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3929 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3930 log_info("HCI_STATE_HALTING: wait 50 ms"); 3931 hci_stack->substate = HCI_HALTING_W4_TIMER; 3932 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3933 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3934 btstack_run_loop_add_timer(&hci_stack->timeout); 3935 break; 3936 } 3937 3938 /* fall through */ 3939 3940 case HCI_HALTING_CLOSE: 3941 log_info("HCI_STATE_HALTING, calling off"); 3942 3943 // switch mode 3944 hci_power_control_off(); 3945 3946 log_info("HCI_STATE_HALTING, emitting state"); 3947 hci_emit_state(); 3948 log_info("HCI_STATE_HALTING, done"); 3949 break; 3950 3951 case HCI_HALTING_W4_TIMER: 3952 // keep waiting 3953 3954 break; 3955 default: 3956 break; 3957 } 3958 3959 break; 3960 3961 case HCI_STATE_FALLING_ASLEEP: 3962 switch(hci_stack->substate) { 3963 case HCI_FALLING_ASLEEP_DISCONNECT: 3964 log_info("HCI_STATE_FALLING_ASLEEP"); 3965 // close all open connections 3966 connection = (hci_connection_t *) hci_stack->connections; 3967 3968 #ifdef HAVE_PLATFORM_IPHONE_OS 3969 // don't close connections, if H4 supports power management 3970 if (btstack_control_iphone_power_management_enabled()){ 3971 connection = NULL; 3972 } 3973 #endif 3974 if (connection){ 3975 3976 // send disconnect 3977 if (!hci_can_send_command_packet_now()) return; 3978 3979 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3980 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3981 3982 // send disconnected event right away - causes higher layer connections to get closed, too. 3983 hci_shutdown_connection(connection); 3984 return; 3985 } 3986 3987 if (hci_classic_supported()){ 3988 // disable page and inquiry scan 3989 if (!hci_can_send_command_packet_now()) return; 3990 3991 log_info("HCI_STATE_HALTING, disabling inq scans"); 3992 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3993 3994 // continue in next sub state 3995 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3996 break; 3997 } 3998 3999 /* fall through */ 4000 4001 case HCI_FALLING_ASLEEP_COMPLETE: 4002 log_info("HCI_STATE_HALTING, calling sleep"); 4003 #ifdef HAVE_PLATFORM_IPHONE_OS 4004 // don't actually go to sleep, if H4 supports power management 4005 if (btstack_control_iphone_power_management_enabled()){ 4006 // SLEEP MODE reached 4007 hci_stack->state = HCI_STATE_SLEEPING; 4008 hci_emit_state(); 4009 break; 4010 } 4011 #endif 4012 // switch mode 4013 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4014 hci_emit_state(); 4015 break; 4016 4017 default: 4018 break; 4019 } 4020 break; 4021 4022 default: 4023 break; 4024 } 4025 } 4026 4027 int hci_send_cmd_packet(uint8_t *packet, int size){ 4028 // house-keeping 4029 4030 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4031 hci_stack->loopback_mode = packet[3]; 4032 } 4033 4034 #ifdef ENABLE_CLASSIC 4035 bd_addr_t addr; 4036 hci_connection_t * conn; 4037 4038 // create_connection? 4039 if (IS_COMMAND(packet, hci_create_connection)){ 4040 reverse_bd_addr(&packet[3], addr); 4041 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4042 4043 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4044 if (!conn){ 4045 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4046 if (!conn){ 4047 // notify client that alloc failed 4048 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4049 return -1; // packet not sent to controller 4050 } 4051 conn->state = SEND_CREATE_CONNECTION; 4052 } 4053 log_info("conn state %u", conn->state); 4054 switch (conn->state){ 4055 // if connection active exists 4056 case OPEN: 4057 // and OPEN, emit connection complete command 4058 hci_emit_connection_complete(addr, conn->con_handle, 0); 4059 return -1; // packet not sent to controller 4060 case RECEIVED_DISCONNECTION_COMPLETE: 4061 // create connection triggered in disconnect complete event, let's do it now 4062 break; 4063 case SEND_CREATE_CONNECTION: 4064 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4065 break; 4066 default: 4067 // otherwise, just ignore as it is already in the open process 4068 return -1; // packet not sent to controller 4069 } 4070 conn->state = SENT_CREATE_CONNECTION; 4071 4072 // track outgoing connection 4073 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4074 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4075 } 4076 4077 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4078 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4079 } 4080 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4081 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4082 } 4083 4084 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4085 if (hci_stack->link_key_db){ 4086 reverse_bd_addr(&packet[3], addr); 4087 hci_stack->link_key_db->delete_link_key(addr); 4088 } 4089 } 4090 4091 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4092 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4093 reverse_bd_addr(&packet[3], addr); 4094 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4095 if (conn){ 4096 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4097 } 4098 } 4099 4100 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4101 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4102 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4103 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4104 reverse_bd_addr(&packet[3], addr); 4105 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4106 if (conn){ 4107 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4108 } 4109 } 4110 4111 #ifdef ENABLE_SCO_OVER_HCI 4112 // setup_synchronous_connection? Voice setting at offset 22 4113 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4114 // TODO: compare to current setting if sco connection already active 4115 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4116 } 4117 // accept_synchronus_connection? Voice setting at offset 18 4118 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4119 // TODO: compare to current setting if sco connection already active 4120 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4121 } 4122 #endif 4123 #endif 4124 4125 #ifdef ENABLE_BLE 4126 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4127 hci_stack->le_random_address_set = 1; 4128 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4129 } 4130 #ifdef ENABLE_LE_PERIPHERAL 4131 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4132 hci_stack->le_advertisements_active = packet[3]; 4133 } 4134 #endif 4135 #ifdef ENABLE_LE_CENTRAL 4136 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4137 // white list used? 4138 uint8_t initiator_filter_policy = packet[7]; 4139 switch (initiator_filter_policy){ 4140 case 0: 4141 // whitelist not used 4142 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4143 break; 4144 case 1: 4145 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4146 break; 4147 default: 4148 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4149 break; 4150 } 4151 } 4152 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4153 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4154 } 4155 #endif 4156 #endif 4157 4158 hci_stack->num_cmd_packets--; 4159 4160 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4161 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4162 } 4163 4164 // disconnect because of security block 4165 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4166 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4167 if (!connection) return; 4168 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4169 } 4170 4171 4172 // Configure Secure Simple Pairing 4173 4174 #ifdef ENABLE_CLASSIC 4175 4176 // enable will enable SSP during init 4177 void gap_ssp_set_enable(int enable){ 4178 hci_stack->ssp_enable = enable; 4179 } 4180 4181 static int hci_local_ssp_activated(void){ 4182 return gap_ssp_supported() && hci_stack->ssp_enable; 4183 } 4184 4185 // if set, BTstack will respond to io capability request using authentication requirement 4186 void gap_ssp_set_io_capability(int io_capability){ 4187 hci_stack->ssp_io_capability = io_capability; 4188 } 4189 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4190 hci_stack->ssp_authentication_requirement = authentication_requirement; 4191 } 4192 4193 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4194 void gap_ssp_set_auto_accept(int auto_accept){ 4195 hci_stack->ssp_auto_accept = auto_accept; 4196 } 4197 #endif 4198 4199 // va_list part of hci_send_cmd 4200 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4201 if (!hci_can_send_command_packet_now()){ 4202 log_error("hci_send_cmd called but cannot send packet now"); 4203 return 0; 4204 } 4205 4206 // for HCI INITIALIZATION 4207 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4208 hci_stack->last_cmd_opcode = cmd->opcode; 4209 4210 hci_reserve_packet_buffer(); 4211 uint8_t * packet = hci_stack->hci_packet_buffer; 4212 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4213 int err = hci_send_cmd_packet(packet, size); 4214 4215 // release packet buffer on error or for synchronous transport implementations 4216 if ((err < 0) || hci_transport_synchronous()){ 4217 hci_release_packet_buffer(); 4218 hci_emit_transport_packet_sent(); 4219 } 4220 4221 return err; 4222 } 4223 4224 /** 4225 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4226 */ 4227 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4228 va_list argptr; 4229 va_start(argptr, cmd); 4230 int res = hci_send_cmd_va_arg(cmd, argptr); 4231 va_end(argptr); 4232 return res; 4233 } 4234 4235 // Create various non-HCI events. 4236 // TODO: generalize, use table similar to hci_create_command 4237 4238 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4239 // dump packet 4240 if (dump) { 4241 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4242 } 4243 4244 // dispatch to all event handlers 4245 btstack_linked_list_iterator_t it; 4246 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4247 while (btstack_linked_list_iterator_has_next(&it)){ 4248 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4249 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4250 } 4251 } 4252 4253 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4254 if (!hci_stack->acl_packet_handler) return; 4255 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4256 } 4257 4258 #ifdef ENABLE_CLASSIC 4259 static void hci_notify_if_sco_can_send_now(void){ 4260 // notify SCO sender if waiting 4261 if (!hci_stack->sco_waiting_for_can_send_now) return; 4262 if (hci_can_send_sco_packet_now()){ 4263 hci_stack->sco_waiting_for_can_send_now = 0; 4264 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4265 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4266 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4267 } 4268 } 4269 4270 // parsing end emitting has been merged to reduce code size 4271 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4272 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4273 4274 uint8_t * eir_data; 4275 ad_context_t context; 4276 const uint8_t * name; 4277 uint8_t name_len; 4278 4279 if (size < 3) return; 4280 4281 int event_type = hci_event_packet_get_type(packet); 4282 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4283 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4284 4285 switch (event_type){ 4286 case HCI_EVENT_INQUIRY_RESULT: 4287 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4288 if (size != (3 + (num_responses * 14))) return; 4289 break; 4290 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4291 if (size != 257) return; 4292 if (num_responses != 1) return; 4293 break; 4294 default: 4295 return; 4296 } 4297 4298 // event[1] is set at the end 4299 int i; 4300 for (i=0; i<num_responses;i++){ 4301 memset(event, 0, sizeof(event)); 4302 event[0] = GAP_EVENT_INQUIRY_RESULT; 4303 uint8_t event_size = 18; // if name is not set by EIR 4304 4305 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4306 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4307 (void)memcpy(&event[9], 4308 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4309 3); // class of device 4310 (void)memcpy(&event[12], 4311 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4312 2); // clock offset 4313 4314 switch (event_type){ 4315 case HCI_EVENT_INQUIRY_RESULT: 4316 // 14,15,16,17 = 0, size 18 4317 break; 4318 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4319 event[14] = 1; 4320 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4321 // 16,17 = 0, size 18 4322 break; 4323 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4324 event[14] = 1; 4325 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4326 // EIR packets only contain a single inquiry response 4327 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4328 name = NULL; 4329 // Iterate over EIR data 4330 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4331 uint8_t data_type = ad_iterator_get_data_type(&context); 4332 uint8_t data_size = ad_iterator_get_data_len(&context); 4333 const uint8_t * data = ad_iterator_get_data(&context); 4334 // Prefer Complete Local Name over Shortend Local Name 4335 switch (data_type){ 4336 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4337 if (name) continue; 4338 /* fall through */ 4339 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4340 name = data; 4341 name_len = data_size; 4342 break; 4343 default: 4344 break; 4345 } 4346 } 4347 if (name){ 4348 event[16] = 1; 4349 // truncate name if needed 4350 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4351 event[17] = len; 4352 (void)memcpy(&event[18], name, len); 4353 event_size += len; 4354 } 4355 break; 4356 } 4357 event[1] = event_size - 2; 4358 hci_emit_event(event, event_size, 1); 4359 } 4360 } 4361 #endif 4362 4363 void hci_emit_state(void){ 4364 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4365 uint8_t event[3]; 4366 event[0] = BTSTACK_EVENT_STATE; 4367 event[1] = sizeof(event) - 2; 4368 event[2] = hci_stack->state; 4369 hci_emit_event(event, sizeof(event), 1); 4370 } 4371 4372 #ifdef ENABLE_CLASSIC 4373 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4374 uint8_t event[13]; 4375 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4376 event[1] = sizeof(event) - 2; 4377 event[2] = status; 4378 little_endian_store_16(event, 3, con_handle); 4379 reverse_bd_addr(address, &event[5]); 4380 event[11] = 1; // ACL connection 4381 event[12] = 0; // encryption disabled 4382 hci_emit_event(event, sizeof(event), 1); 4383 } 4384 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4385 if (disable_l2cap_timeouts) return; 4386 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4387 uint8_t event[4]; 4388 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4389 event[1] = sizeof(event) - 2; 4390 little_endian_store_16(event, 2, conn->con_handle); 4391 hci_emit_event(event, sizeof(event), 1); 4392 } 4393 #endif 4394 4395 #ifdef ENABLE_BLE 4396 #ifdef ENABLE_LE_CENTRAL 4397 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4398 uint8_t event[21]; 4399 event[0] = HCI_EVENT_LE_META; 4400 event[1] = sizeof(event) - 2; 4401 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4402 event[3] = status; 4403 little_endian_store_16(event, 4, con_handle); 4404 event[6] = 0; // TODO: role 4405 event[7] = address_type; 4406 reverse_bd_addr(address, &event[8]); 4407 little_endian_store_16(event, 14, 0); // interval 4408 little_endian_store_16(event, 16, 0); // latency 4409 little_endian_store_16(event, 18, 0); // supervision timeout 4410 event[20] = 0; // master clock accuracy 4411 hci_emit_event(event, sizeof(event), 1); 4412 } 4413 #endif 4414 #endif 4415 4416 static void hci_emit_transport_packet_sent(void){ 4417 // notify upper stack that it might be possible to send again 4418 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4419 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4420 } 4421 4422 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4423 uint8_t event[6]; 4424 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4425 event[1] = sizeof(event) - 2; 4426 event[2] = 0; // status = OK 4427 little_endian_store_16(event, 3, con_handle); 4428 event[5] = reason; 4429 hci_emit_event(event, sizeof(event), 1); 4430 } 4431 4432 static void hci_emit_nr_connections_changed(void){ 4433 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4434 uint8_t event[3]; 4435 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4436 event[1] = sizeof(event) - 2; 4437 event[2] = nr_hci_connections(); 4438 hci_emit_event(event, sizeof(event), 1); 4439 } 4440 4441 static void hci_emit_hci_open_failed(void){ 4442 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4443 uint8_t event[2]; 4444 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4445 event[1] = sizeof(event) - 2; 4446 hci_emit_event(event, sizeof(event), 1); 4447 } 4448 4449 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4450 log_info("hci_emit_dedicated_bonding_result %u ", status); 4451 uint8_t event[9]; 4452 int pos = 0; 4453 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4454 event[pos++] = sizeof(event) - 2; 4455 event[pos++] = status; 4456 reverse_bd_addr(address, &event[pos]); 4457 hci_emit_event(event, sizeof(event), 1); 4458 } 4459 4460 4461 #ifdef ENABLE_CLASSIC 4462 4463 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4464 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4465 uint8_t event[5]; 4466 int pos = 0; 4467 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4468 event[pos++] = sizeof(event) - 2; 4469 little_endian_store_16(event, 2, con_handle); 4470 pos += 2; 4471 event[pos++] = level; 4472 hci_emit_event(event, sizeof(event), 1); 4473 } 4474 4475 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4476 if (!connection) return LEVEL_0; 4477 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4478 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4479 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4480 // LEVEL 4 always requires 128 bit encrytion key size 4481 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4482 security_level = LEVEL_3; 4483 } 4484 return security_level; 4485 } 4486 4487 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4488 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4489 uint8_t event[3]; 4490 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4491 event[1] = sizeof(event) - 2; 4492 event[2] = enabled; 4493 hci_emit_event(event, sizeof(event), 1); 4494 } 4495 4496 // query if remote side supports eSCO 4497 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4498 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4499 if (!connection) return 0; 4500 return connection->remote_supported_feature_eSCO; 4501 } 4502 4503 // query if remote side supports SSP 4504 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4505 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4506 if (!connection) return 0; 4507 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4508 } 4509 4510 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4511 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4512 } 4513 4514 // GAP API 4515 /** 4516 * @bbrief enable/disable bonding. default is enabled 4517 * @praram enabled 4518 */ 4519 void gap_set_bondable_mode(int enable){ 4520 hci_stack->bondable = enable ? 1 : 0; 4521 } 4522 /** 4523 * @brief Get bondable mode. 4524 * @return 1 if bondable 4525 */ 4526 int gap_get_bondable_mode(void){ 4527 return hci_stack->bondable; 4528 } 4529 4530 /** 4531 * @brief map link keys to security levels 4532 */ 4533 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4534 switch (link_key_type){ 4535 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4536 return LEVEL_4; 4537 case COMBINATION_KEY: 4538 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4539 return LEVEL_3; 4540 default: 4541 return LEVEL_2; 4542 } 4543 } 4544 4545 /** 4546 * @brief map link keys to secure connection yes/no 4547 */ 4548 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4549 switch (link_key_type){ 4550 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4551 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4552 return 1; 4553 default: 4554 return 0; 4555 } 4556 } 4557 4558 /** 4559 * @brief map link keys to authenticated 4560 */ 4561 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4562 switch (link_key_type){ 4563 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4564 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4565 return 1; 4566 default: 4567 return 0; 4568 } 4569 } 4570 4571 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4572 log_info("gap_mitm_protection_required_for_security_level %u", level); 4573 return level > LEVEL_2; 4574 } 4575 4576 /** 4577 * @brief get current security level 4578 */ 4579 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4580 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4581 if (!connection) return LEVEL_0; 4582 return gap_security_level_for_connection(connection); 4583 } 4584 4585 /** 4586 * @brief request connection to device to 4587 * @result GAP_AUTHENTICATION_RESULT 4588 */ 4589 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4590 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4591 if (!connection){ 4592 hci_emit_security_level(con_handle, LEVEL_0); 4593 return; 4594 } 4595 gap_security_level_t current_level = gap_security_level(con_handle); 4596 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4597 requested_level, connection->requested_security_level, current_level); 4598 4599 // assumption: earlier requested security higher than current level => security request is active 4600 if (current_level < connection->requested_security_level){ 4601 if (connection->requested_security_level < requested_level){ 4602 // increase requested level as new level is higher 4603 4604 // TODO: handle re-authentication when done 4605 4606 connection->requested_security_level = requested_level; 4607 } 4608 return; 4609 } 4610 4611 // no request active, notify if security sufficient 4612 if (requested_level <= current_level){ 4613 hci_emit_security_level(con_handle, current_level); 4614 return; 4615 } 4616 4617 // start pairing to increase security level 4618 connection->requested_security_level = requested_level; 4619 4620 #if 0 4621 // sending encryption request without a link key results in an error. 4622 // TODO: figure out how to use it properly 4623 4624 // would enabling ecnryption suffice (>= LEVEL_2)? 4625 if (hci_stack->link_key_db){ 4626 link_key_type_t link_key_type; 4627 link_key_t link_key; 4628 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4629 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4630 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4631 return; 4632 } 4633 } 4634 } 4635 #endif 4636 4637 // start to authenticate connection 4638 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4639 hci_run(); 4640 } 4641 4642 /** 4643 * @brief start dedicated bonding with device. disconnect after bonding 4644 * @param device 4645 * @param request MITM protection 4646 * @result GAP_DEDICATED_BONDING_COMPLETE 4647 */ 4648 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4649 4650 // create connection state machine 4651 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4652 4653 if (!connection){ 4654 return BTSTACK_MEMORY_ALLOC_FAILED; 4655 } 4656 4657 // delete linkn key 4658 gap_drop_link_key_for_bd_addr(device); 4659 4660 // configure LEVEL_2/3, dedicated bonding 4661 connection->state = SEND_CREATE_CONNECTION; 4662 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4663 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4664 connection->bonding_flags = BONDING_DEDICATED; 4665 4666 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4667 4668 // handle: connnection failure (connection complete != ok) 4669 // handle: authentication failure 4670 // handle: disconnect on done 4671 4672 hci_run(); 4673 4674 return 0; 4675 } 4676 #endif 4677 4678 void gap_set_local_name(const char * local_name){ 4679 hci_stack->local_name = local_name; 4680 } 4681 4682 4683 #ifdef ENABLE_BLE 4684 4685 #ifdef ENABLE_LE_CENTRAL 4686 void gap_start_scan(void){ 4687 hci_stack->le_scanning_enabled = 1; 4688 hci_run(); 4689 } 4690 4691 void gap_stop_scan(void){ 4692 hci_stack->le_scanning_enabled = 0; 4693 hci_run(); 4694 } 4695 4696 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4697 hci_stack->le_scan_type = scan_type; 4698 hci_stack->le_scan_interval = scan_interval; 4699 hci_stack->le_scan_window = scan_window; 4700 hci_run(); 4701 } 4702 4703 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4704 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4705 if (!conn){ 4706 log_info("gap_connect: no connection exists yet, creating context"); 4707 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4708 if (!conn){ 4709 // notify client that alloc failed 4710 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4711 log_info("gap_connect: failed to alloc hci_connection_t"); 4712 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4713 } 4714 conn->state = SEND_CREATE_CONNECTION; 4715 log_info("gap_connect: send create connection next"); 4716 hci_run(); 4717 return ERROR_CODE_SUCCESS; 4718 } 4719 4720 if (!hci_is_le_connection(conn) || 4721 (conn->state == SEND_CREATE_CONNECTION) || 4722 (conn->state == SENT_CREATE_CONNECTION)) { 4723 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4724 log_error("gap_connect: classic connection or connect is already being created"); 4725 return GATT_CLIENT_IN_WRONG_STATE; 4726 } 4727 4728 // check if connection was just disconnected 4729 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4730 log_info("gap_connect: send create connection (again)"); 4731 conn->state = SEND_CREATE_CONNECTION; 4732 hci_run(); 4733 return ERROR_CODE_SUCCESS; 4734 } 4735 4736 log_info("gap_connect: context exists with state %u", conn->state); 4737 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4738 hci_run(); 4739 return ERROR_CODE_SUCCESS; 4740 } 4741 4742 // @assumption: only a single outgoing LE Connection exists 4743 static hci_connection_t * gap_get_outgoing_connection(void){ 4744 btstack_linked_item_t *it; 4745 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4746 hci_connection_t * conn = (hci_connection_t *) it; 4747 if (!hci_is_le_connection(conn)) continue; 4748 switch (conn->state){ 4749 case SEND_CREATE_CONNECTION: 4750 case SENT_CREATE_CONNECTION: 4751 case SENT_CANCEL_CONNECTION: 4752 return conn; 4753 default: 4754 break; 4755 }; 4756 } 4757 return NULL; 4758 } 4759 4760 uint8_t gap_connect_cancel(void){ 4761 hci_connection_t * conn = gap_get_outgoing_connection(); 4762 if (!conn) return 0; 4763 switch (conn->state){ 4764 case SEND_CREATE_CONNECTION: 4765 // skip sending create connection and emit event instead 4766 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4767 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4768 btstack_memory_hci_connection_free( conn ); 4769 break; 4770 case SENT_CREATE_CONNECTION: 4771 // request to send cancel connection 4772 conn->state = SEND_CANCEL_CONNECTION; 4773 hci_run(); 4774 break; 4775 default: 4776 break; 4777 } 4778 return 0; 4779 } 4780 #endif 4781 4782 #ifdef ENABLE_LE_CENTRAL 4783 /** 4784 * @brief Set connection parameters for outgoing connections 4785 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4786 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4787 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4788 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4789 * @param conn_latency, default: 4 4790 * @param supervision_timeout (unit: 10ms), default: 720 ms 4791 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4792 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4793 */ 4794 4795 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4796 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4797 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4798 hci_stack->le_connection_scan_interval = conn_scan_interval; 4799 hci_stack->le_connection_scan_window = conn_scan_window; 4800 hci_stack->le_connection_interval_min = conn_interval_min; 4801 hci_stack->le_connection_interval_max = conn_interval_max; 4802 hci_stack->le_connection_latency = conn_latency; 4803 hci_stack->le_supervision_timeout = supervision_timeout; 4804 hci_stack->le_minimum_ce_length = min_ce_length; 4805 hci_stack->le_maximum_ce_length = max_ce_length; 4806 } 4807 #endif 4808 4809 /** 4810 * @brief Updates the connection parameters for a given LE connection 4811 * @param handle 4812 * @param conn_interval_min (unit: 1.25ms) 4813 * @param conn_interval_max (unit: 1.25ms) 4814 * @param conn_latency 4815 * @param supervision_timeout (unit: 10ms) 4816 * @returns 0 if ok 4817 */ 4818 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4819 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4820 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4821 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4822 connection->le_conn_interval_min = conn_interval_min; 4823 connection->le_conn_interval_max = conn_interval_max; 4824 connection->le_conn_latency = conn_latency; 4825 connection->le_supervision_timeout = supervision_timeout; 4826 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4827 hci_run(); 4828 return 0; 4829 } 4830 4831 /** 4832 * @brief Request an update of the connection parameter for a given LE connection 4833 * @param handle 4834 * @param conn_interval_min (unit: 1.25ms) 4835 * @param conn_interval_max (unit: 1.25ms) 4836 * @param conn_latency 4837 * @param supervision_timeout (unit: 10ms) 4838 * @returns 0 if ok 4839 */ 4840 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4841 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4842 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4843 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4844 connection->le_conn_interval_min = conn_interval_min; 4845 connection->le_conn_interval_max = conn_interval_max; 4846 connection->le_conn_latency = conn_latency; 4847 connection->le_supervision_timeout = supervision_timeout; 4848 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4849 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4850 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4851 return 0; 4852 } 4853 4854 #ifdef ENABLE_LE_PERIPHERAL 4855 4856 static void gap_advertisments_changed(void){ 4857 // disable advertisements before updating adv, scan data, or adv params 4858 if (hci_stack->le_advertisements_active){ 4859 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4860 } 4861 hci_run(); 4862 } 4863 4864 /** 4865 * @brief Set Advertisement Data 4866 * @param advertising_data_length 4867 * @param advertising_data (max 31 octets) 4868 * @note data is not copied, pointer has to stay valid 4869 */ 4870 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4871 hci_stack->le_advertisements_data_len = advertising_data_length; 4872 hci_stack->le_advertisements_data = advertising_data; 4873 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4874 gap_advertisments_changed(); 4875 } 4876 4877 /** 4878 * @brief Set Scan Response Data 4879 * @param advertising_data_length 4880 * @param advertising_data (max 31 octets) 4881 * @note data is not copied, pointer has to stay valid 4882 */ 4883 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4884 hci_stack->le_scan_response_data_len = scan_response_data_length; 4885 hci_stack->le_scan_response_data = scan_response_data; 4886 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4887 gap_advertisments_changed(); 4888 } 4889 4890 /** 4891 * @brief Set Advertisement Parameters 4892 * @param adv_int_min 4893 * @param adv_int_max 4894 * @param adv_type 4895 * @param direct_address_type 4896 * @param direct_address 4897 * @param channel_map 4898 * @param filter_policy 4899 * 4900 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4901 */ 4902 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4903 uint8_t direct_address_typ, bd_addr_t direct_address, 4904 uint8_t channel_map, uint8_t filter_policy) { 4905 4906 hci_stack->le_advertisements_interval_min = adv_int_min; 4907 hci_stack->le_advertisements_interval_max = adv_int_max; 4908 hci_stack->le_advertisements_type = adv_type; 4909 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4910 hci_stack->le_advertisements_channel_map = channel_map; 4911 hci_stack->le_advertisements_filter_policy = filter_policy; 4912 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4913 6); 4914 4915 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4916 gap_advertisments_changed(); 4917 } 4918 4919 /** 4920 * @brief Enable/Disable Advertisements 4921 * @param enabled 4922 */ 4923 void gap_advertisements_enable(int enabled){ 4924 hci_stack->le_advertisements_enabled = enabled; 4925 if (enabled && !hci_stack->le_advertisements_active){ 4926 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4927 } 4928 if (!enabled && hci_stack->le_advertisements_active){ 4929 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4930 } 4931 hci_run(); 4932 } 4933 4934 #endif 4935 4936 void hci_le_set_own_address_type(uint8_t own_address_type){ 4937 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4938 if (own_address_type == hci_stack->le_own_addr_type) return; 4939 hci_stack->le_own_addr_type = own_address_type; 4940 4941 #ifdef ENABLE_LE_PERIPHERAL 4942 // update advertisement parameters, too 4943 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4944 gap_advertisments_changed(); 4945 #endif 4946 #ifdef ENABLE_LE_CENTRAL 4947 // note: we don't update scan parameters or modify ongoing connection attempts 4948 #endif 4949 } 4950 4951 #endif 4952 4953 uint8_t gap_disconnect(hci_con_handle_t handle){ 4954 hci_connection_t * conn = hci_connection_for_handle(handle); 4955 if (!conn){ 4956 hci_emit_disconnection_complete(handle, 0); 4957 return 0; 4958 } 4959 // ignore if already disconnected 4960 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4961 return 0; 4962 } 4963 conn->state = SEND_DISCONNECT; 4964 hci_run(); 4965 return 0; 4966 } 4967 4968 int gap_read_rssi(hci_con_handle_t con_handle){ 4969 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4970 if (hci_connection == NULL) return 0; 4971 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4972 hci_run(); 4973 return 1; 4974 } 4975 4976 /** 4977 * @brief Get connection type 4978 * @param con_handle 4979 * @result connection_type 4980 */ 4981 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4982 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4983 if (!conn) return GAP_CONNECTION_INVALID; 4984 switch (conn->address_type){ 4985 case BD_ADDR_TYPE_LE_PUBLIC: 4986 case BD_ADDR_TYPE_LE_RANDOM: 4987 return GAP_CONNECTION_LE; 4988 case BD_ADDR_TYPE_SCO: 4989 return GAP_CONNECTION_SCO; 4990 case BD_ADDR_TYPE_ACL: 4991 return GAP_CONNECTION_ACL; 4992 default: 4993 return GAP_CONNECTION_INVALID; 4994 } 4995 } 4996 4997 #ifdef ENABLE_BLE 4998 4999 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){ 5000 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5001 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5002 5003 conn->le_phy_update_all_phys = all_phys; 5004 conn->le_phy_update_tx_phys = tx_phys; 5005 conn->le_phy_update_rx_phys = rx_phys; 5006 conn->le_phy_update_phy_options = phy_options; 5007 5008 hci_run(); 5009 5010 return 0; 5011 } 5012 5013 #ifdef ENABLE_LE_CENTRAL 5014 /** 5015 * @brief Auto Connection Establishment - Start Connecting to device 5016 * @param address_typ 5017 * @param address 5018 * @returns 0 if ok 5019 */ 5020 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5021 // check capacity 5022 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5023 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5024 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5025 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5026 entry->address_type = address_type; 5027 (void)memcpy(entry->address, address, 6); 5028 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5029 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5030 hci_run(); 5031 return 0; 5032 } 5033 5034 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5035 btstack_linked_list_iterator_t it; 5036 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5037 while (btstack_linked_list_iterator_has_next(&it)){ 5038 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5039 if (entry->address_type != address_type) continue; 5040 if (memcmp(entry->address, address, 6) != 0) continue; 5041 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5042 // remove from controller if already present 5043 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5044 continue; 5045 } 5046 // direclty remove entry from whitelist 5047 btstack_linked_list_iterator_remove(&it); 5048 btstack_memory_whitelist_entry_free(entry); 5049 } 5050 } 5051 5052 /** 5053 * @brief Auto Connection Establishment - Stop Connecting to device 5054 * @param address_typ 5055 * @param address 5056 * @returns 0 if ok 5057 */ 5058 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5059 hci_remove_from_whitelist(address_type, address); 5060 hci_run(); 5061 return 0; 5062 } 5063 5064 /** 5065 * @brief Auto Connection Establishment - Stop everything 5066 * @note Convenience function to stop all active auto connection attempts 5067 */ 5068 void gap_auto_connection_stop_all(void){ 5069 btstack_linked_list_iterator_t it; 5070 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5071 while (btstack_linked_list_iterator_has_next(&it)){ 5072 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5073 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5074 // remove from controller if already present 5075 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5076 continue; 5077 } 5078 // directly remove entry from whitelist 5079 btstack_linked_list_iterator_remove(&it); 5080 btstack_memory_whitelist_entry_free(entry); 5081 } 5082 hci_run(); 5083 } 5084 5085 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5086 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5087 if (!conn) return 0; 5088 return conn->le_connection_interval; 5089 } 5090 #endif 5091 #endif 5092 5093 #ifdef ENABLE_CLASSIC 5094 /** 5095 * @brief Set Extended Inquiry Response data 5096 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5097 * @note has to be done before stack starts up 5098 */ 5099 void gap_set_extended_inquiry_response(const uint8_t * data){ 5100 hci_stack->eir_data = data; 5101 } 5102 5103 /** 5104 * @brief Start GAP Classic Inquiry 5105 * @param duration in 1.28s units 5106 * @return 0 if ok 5107 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5108 */ 5109 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5110 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5111 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5112 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5113 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5114 } 5115 hci_stack->inquiry_state = duration_in_1280ms_units; 5116 hci_run(); 5117 return 0; 5118 } 5119 5120 /** 5121 * @brief Stop GAP Classic Inquiry 5122 * @returns 0 if ok 5123 */ 5124 int gap_inquiry_stop(void){ 5125 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5126 // emit inquiry complete event, before it even started 5127 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5128 hci_emit_event(event, sizeof(event), 1); 5129 return 0; 5130 } 5131 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5132 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5133 hci_run(); 5134 return 0; 5135 } 5136 5137 5138 /** 5139 * @brief Remote Name Request 5140 * @param addr 5141 * @param page_scan_repetition_mode 5142 * @param clock_offset only used when bit 15 is set 5143 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5144 */ 5145 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5146 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5147 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5148 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5149 hci_stack->remote_name_clock_offset = clock_offset; 5150 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5151 hci_run(); 5152 return 0; 5153 } 5154 5155 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5156 hci_stack->gap_pairing_state = state; 5157 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5158 hci_run(); 5159 return 0; 5160 } 5161 5162 /** 5163 * @brief Legacy Pairing Pin Code Response 5164 * @param addr 5165 * @param pin 5166 * @return 0 if ok 5167 */ 5168 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5169 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5170 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5171 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5172 } 5173 5174 /** 5175 * @brief Abort Legacy Pairing 5176 * @param addr 5177 * @param pin 5178 * @return 0 if ok 5179 */ 5180 int gap_pin_code_negative(bd_addr_t addr){ 5181 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5182 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5183 } 5184 5185 /** 5186 * @brief SSP Passkey Response 5187 * @param addr 5188 * @param passkey 5189 * @return 0 if ok 5190 */ 5191 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5192 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5193 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5194 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5195 } 5196 5197 /** 5198 * @brief Abort SSP Passkey Entry/Pairing 5199 * @param addr 5200 * @param pin 5201 * @return 0 if ok 5202 */ 5203 int gap_ssp_passkey_negative(bd_addr_t addr){ 5204 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5205 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5206 } 5207 5208 /** 5209 * @brief Accept SSP Numeric Comparison 5210 * @param addr 5211 * @param passkey 5212 * @return 0 if ok 5213 */ 5214 int gap_ssp_confirmation_response(bd_addr_t addr){ 5215 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5216 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5217 } 5218 5219 /** 5220 * @brief Abort SSP Numeric Comparison/Pairing 5221 * @param addr 5222 * @param pin 5223 * @return 0 if ok 5224 */ 5225 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5226 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5227 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5228 } 5229 5230 /** 5231 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5232 * @param inquiry_mode see bluetooth_defines.h 5233 */ 5234 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5235 hci_stack->inquiry_mode = mode; 5236 } 5237 5238 /** 5239 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5240 */ 5241 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5242 hci_stack->sco_voice_setting = voice_setting; 5243 } 5244 5245 /** 5246 * @brief Get SCO Voice Setting 5247 * @return current voice setting 5248 */ 5249 uint16_t hci_get_sco_voice_setting(void){ 5250 return hci_stack->sco_voice_setting; 5251 } 5252 5253 static int hci_have_usb_transport(void){ 5254 if (!hci_stack->hci_transport) return 0; 5255 const char * transport_name = hci_stack->hci_transport->name; 5256 if (!transport_name) return 0; 5257 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5258 } 5259 5260 /** @brief Get SCO packet length for current SCO Voice setting 5261 * @note Using SCO packets of the exact length is required for USB transfer 5262 * @return Length of SCO packets in bytes (not audio frames) 5263 */ 5264 int hci_get_sco_packet_length(void){ 5265 int sco_packet_length = 0; 5266 5267 #ifdef ENABLE_SCO_OVER_HCI 5268 5269 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5270 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5271 5272 if (hci_have_usb_transport()){ 5273 // see Core Spec for H2 USB Transfer. 5274 // 3 byte SCO header + 24 bytes per connection 5275 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5276 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5277 } else { 5278 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5279 sco_packet_length = 3 + 60 * multiplier; 5280 // assert that it still fits inside an SCO buffer 5281 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5282 sco_packet_length = 3 + 60; 5283 } 5284 } 5285 #endif 5286 return sco_packet_length; 5287 } 5288 5289 /** 5290 * @brief Sets the master/slave policy 5291 * @param policy (0: attempt to become master, 1: let connecting device decide) 5292 */ 5293 void hci_set_master_slave_policy(uint8_t policy){ 5294 hci_stack->master_slave_policy = policy; 5295 } 5296 5297 #endif 5298 5299 HCI_STATE hci_get_state(void){ 5300 return hci_stack->state; 5301 } 5302 5303 #ifdef ENABLE_CLASSIC 5304 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5305 hci_stack->gap_classic_accept_callback = accept_callback; 5306 } 5307 #endif 5308 5309 /** 5310 * @brief Set callback for Bluetooth Hardware Error 5311 */ 5312 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5313 hci_stack->hardware_error_callback = fn; 5314 } 5315 5316 void hci_disconnect_all(void){ 5317 btstack_linked_list_iterator_t it; 5318 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5319 while (btstack_linked_list_iterator_has_next(&it)){ 5320 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5321 if (con->state == SENT_DISCONNECT) continue; 5322 con->state = SEND_DISCONNECT; 5323 } 5324 hci_run(); 5325 } 5326 5327 uint16_t hci_get_manufacturer(void){ 5328 return hci_stack->manufacturer; 5329 } 5330 5331 #ifdef ENABLE_BLE 5332 5333 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5334 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5335 if (!hci_con) return NULL; 5336 return &hci_con->sm_connection; 5337 } 5338 5339 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5340 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5341 5342 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5343 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5344 if (hci_connection == NULL) return 0; 5345 if (hci_is_le_connection(hci_connection)){ 5346 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5347 if (sm_conn->sm_connection_encrypted) { 5348 return sm_conn->sm_actual_encryption_key_size; 5349 } 5350 } 5351 #ifdef ENABLE_CLASSIC 5352 else { 5353 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5354 return hci_connection->encryption_key_size; 5355 } 5356 } 5357 #endif 5358 return 0; 5359 } 5360 5361 int gap_authenticated(hci_con_handle_t con_handle){ 5362 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5363 if (hci_connection == NULL) return 0; 5364 5365 switch (hci_connection->address_type){ 5366 case BD_ADDR_TYPE_LE_PUBLIC: 5367 case BD_ADDR_TYPE_LE_RANDOM: 5368 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5369 return hci_connection->sm_connection.sm_connection_authenticated; 5370 #ifdef ENABLE_CLASSIC 5371 case BD_ADDR_TYPE_SCO: 5372 case BD_ADDR_TYPE_ACL: 5373 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5374 #endif 5375 default: 5376 return 0; 5377 } 5378 } 5379 5380 int gap_secure_connection(hci_con_handle_t con_handle){ 5381 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5382 if (hci_connection == NULL) return 0; 5383 5384 switch (hci_connection->address_type){ 5385 case BD_ADDR_TYPE_LE_PUBLIC: 5386 case BD_ADDR_TYPE_LE_RANDOM: 5387 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5388 return hci_connection->sm_connection.sm_connection_sc; 5389 #ifdef ENABLE_CLASSIC 5390 case BD_ADDR_TYPE_SCO: 5391 case BD_ADDR_TYPE_ACL: 5392 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5393 #endif 5394 default: 5395 return 0; 5396 } 5397 } 5398 5399 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5400 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5401 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5402 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5403 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5404 return sm_conn->sm_connection_authorization_state; 5405 } 5406 #endif 5407 5408 #ifdef ENABLE_CLASSIC 5409 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){ 5410 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5411 if (!conn) return GAP_CONNECTION_INVALID; 5412 conn->sniff_min_interval = sniff_min_interval; 5413 conn->sniff_max_interval = sniff_max_interval; 5414 conn->sniff_attempt = sniff_attempt; 5415 conn->sniff_timeout = sniff_timeout; 5416 hci_run(); 5417 return 0; 5418 } 5419 5420 /** 5421 * @brief Exit Sniff mode 5422 * @param con_handle 5423 @ @return 0 if ok 5424 */ 5425 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5426 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5427 if (!conn) return GAP_CONNECTION_INVALID; 5428 conn->sniff_min_interval = 0xffff; 5429 hci_run(); 5430 return 0; 5431 } 5432 #endif 5433 5434 void hci_halting_defer(void){ 5435 if (hci_stack->state != HCI_STATE_HALTING) return; 5436 switch (hci_stack->substate){ 5437 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5438 case HCI_HALTING_CLOSE: 5439 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5440 break; 5441 default: 5442 break; 5443 } 5444 } 5445 5446 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5447 void hci_setup_test_connections_fuzz(void){ 5448 hci_connection_t * conn; 5449 5450 // default address: 66:55:44:33:00:01 5451 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5452 5453 // setup Controller info 5454 hci_stack->num_cmd_packets = 255; 5455 hci_stack->acl_packets_total_num = 255; 5456 5457 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5458 addr[5] = 0x01; 5459 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5460 conn->con_handle = addr[5]; 5461 conn->role = HCI_ROLE_SLAVE; 5462 conn->state = RECEIVED_CONNECTION_REQUEST; 5463 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5464 5465 // setup incoming Classic SCO connection with con handle 0x0002 5466 addr[5] = 0x02; 5467 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5468 conn->con_handle = addr[5]; 5469 conn->role = HCI_ROLE_SLAVE; 5470 conn->state = RECEIVED_CONNECTION_REQUEST; 5471 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5472 5473 // setup ready Classic ACL connection with con handle 0x0003 5474 addr[5] = 0x03; 5475 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5476 conn->con_handle = addr[5]; 5477 conn->role = HCI_ROLE_SLAVE; 5478 conn->state = OPEN; 5479 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5480 5481 // setup ready Classic SCO connection with con handle 0x0004 5482 addr[5] = 0x04; 5483 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5484 conn->con_handle = addr[5]; 5485 conn->role = HCI_ROLE_SLAVE; 5486 conn->state = OPEN; 5487 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5488 5489 // setup ready LE ACL connection with con handle 0x005 and public address 5490 addr[5] = 0x05; 5491 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5492 conn->con_handle = addr[5]; 5493 conn->role = HCI_ROLE_SLAVE; 5494 conn->state = OPEN; 5495 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5496 } 5497 5498 void hci_free_connections_fuzz(void){ 5499 btstack_linked_list_iterator_t it; 5500 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5501 while (btstack_linked_list_iterator_has_next(&it)){ 5502 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5503 btstack_linked_list_iterator_remove(&it); 5504 btstack_memory_hci_connection_free(con); 5505 } 5506 } 5507 void hci_simulate_working_fuzz(void){ 5508 hci_init_done(); 5509 hci_stack->num_cmd_packets = 255; 5510 } 5511 #endif 5512