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 hci_stack->local_supported_commands[1] = 2060 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6); // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2061 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2062 } 2063 #ifdef ENABLE_CLASSIC 2064 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2065 if (packet[5] == 0){ 2066 hci_stack->synchronous_flow_control_enabled = 1; 2067 } 2068 } 2069 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2070 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2071 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2072 conn = hci_connection_for_handle(handle); 2073 if (!conn) break; 2074 if (status == 0){ 2075 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2076 log_info("Handle %x04x key Size: %u", handle, key_size); 2077 conn->encryption_key_size = key_size; 2078 } else { 2079 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2080 conn->encryption_key_size = 1; 2081 } 2082 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2083 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2084 } 2085 #endif 2086 break; 2087 2088 case HCI_EVENT_COMMAND_STATUS: 2089 // get num cmd packets - limit to 1 to reduce complexity 2090 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2091 2092 // check command status to detected failed outgoing connections 2093 create_connection_cmd = 0; 2094 #ifdef ENABLE_CLASSIC 2095 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2096 create_connection_cmd = 1; 2097 } 2098 #endif 2099 #ifdef ENABLE_LE_CENTRAL 2100 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2101 create_connection_cmd = 1; 2102 } 2103 #endif 2104 if (create_connection_cmd) { 2105 uint8_t status = hci_event_command_status_get_status(packet); 2106 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2107 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); 2108 2109 // reset outgoing address info 2110 memset(hci_stack->outgoing_addr, 0, 6); 2111 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2112 2113 // error => outgoing connection failed 2114 if ((conn != NULL) && (status != 0)){ 2115 hci_handle_connection_failed(conn, status); 2116 } 2117 } 2118 break; 2119 2120 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2121 if (size < 3) return; 2122 uint16_t num_handles = packet[2]; 2123 if (size != (3 + num_handles * 4)) return; 2124 uint16_t offset = 3; 2125 for (i=0; i<num_handles;i++){ 2126 handle = little_endian_read_16(packet, offset) & 0x0fff; 2127 offset += 2; 2128 uint16_t num_packets = little_endian_read_16(packet, offset); 2129 offset += 2; 2130 2131 conn = hci_connection_for_handle(handle); 2132 if (!conn){ 2133 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2134 continue; 2135 } 2136 2137 if (conn->num_packets_sent >= num_packets){ 2138 conn->num_packets_sent -= num_packets; 2139 } else { 2140 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2141 conn->num_packets_sent = 0; 2142 } 2143 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2144 2145 #ifdef ENABLE_CLASSIC 2146 // For SCO, we do the can_send_now_check here 2147 hci_notify_if_sco_can_send_now(); 2148 #endif 2149 } 2150 break; 2151 } 2152 2153 #ifdef ENABLE_CLASSIC 2154 case HCI_EVENT_INQUIRY_COMPLETE: 2155 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2156 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2157 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2158 hci_emit_event(event, sizeof(event), 1); 2159 } 2160 break; 2161 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2162 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2163 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2164 } 2165 break; 2166 case HCI_EVENT_CONNECTION_REQUEST: 2167 reverse_bd_addr(&packet[2], addr); 2168 if (hci_stack->gap_classic_accept_callback != NULL){ 2169 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2170 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2171 bd_addr_copy(hci_stack->decline_addr, addr); 2172 break; 2173 } 2174 } 2175 2176 // TODO: eval COD 8-10 2177 link_type = packet[11]; 2178 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2179 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2180 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2181 if (!conn) { 2182 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2183 } 2184 if (!conn) { 2185 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2186 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2187 bd_addr_copy(hci_stack->decline_addr, addr); 2188 break; 2189 } 2190 conn->role = HCI_ROLE_SLAVE; 2191 conn->state = RECEIVED_CONNECTION_REQUEST; 2192 // store info about eSCO 2193 if (link_type == 0x02){ 2194 conn->remote_supported_feature_eSCO = 1; 2195 } 2196 hci_run(); 2197 break; 2198 2199 case HCI_EVENT_CONNECTION_COMPLETE: 2200 // Connection management 2201 reverse_bd_addr(&packet[5], addr); 2202 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2203 addr_type = BD_ADDR_TYPE_ACL; 2204 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2205 if (conn) { 2206 if (!packet[2]){ 2207 conn->state = OPEN; 2208 conn->con_handle = little_endian_read_16(packet, 3); 2209 2210 // queue get remote feature 2211 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2212 2213 // queue set supervision timeout if we're master 2214 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2215 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2216 } 2217 2218 // restart timer 2219 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2220 btstack_run_loop_add_timer(&conn->timeout); 2221 2222 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2223 2224 hci_emit_nr_connections_changed(); 2225 } else { 2226 // connection failed 2227 hci_handle_connection_failed(conn, packet[2]); 2228 } 2229 } 2230 break; 2231 2232 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2233 reverse_bd_addr(&packet[5], addr); 2234 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2235 if (packet[2]){ 2236 // connection failed 2237 break; 2238 } 2239 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2240 if (!conn) { 2241 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2242 } 2243 if (!conn) { 2244 break; 2245 } 2246 conn->state = OPEN; 2247 conn->con_handle = little_endian_read_16(packet, 3); 2248 2249 #ifdef ENABLE_SCO_OVER_HCI 2250 // update SCO 2251 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2252 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2253 } 2254 // trigger can send now 2255 if (hci_have_usb_transport()){ 2256 hci_stack->sco_can_send_now = 1; 2257 } 2258 #endif 2259 break; 2260 2261 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2262 handle = little_endian_read_16(packet, 3); 2263 conn = hci_connection_for_handle(handle); 2264 if (!conn) break; 2265 if (!packet[2]){ 2266 uint8_t * features = &packet[5]; 2267 if (features[6] & (1 << 3)){ 2268 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2269 } 2270 if (features[3] & (1<<7)){ 2271 conn->remote_supported_feature_eSCO = 1; 2272 } 2273 } 2274 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2275 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2276 if (conn->bonding_flags & BONDING_DEDICATED){ 2277 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2278 } 2279 break; 2280 2281 case HCI_EVENT_LINK_KEY_REQUEST: 2282 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2283 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2284 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2285 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2286 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2287 hci_run(); 2288 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2289 return; 2290 2291 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2292 reverse_bd_addr(&packet[2], addr); 2293 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2294 if (!conn) break; 2295 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2296 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2297 // Change Connection Encryption keeps link key type 2298 if (link_key_type != CHANGED_COMBINATION_KEY){ 2299 conn->link_key_type = link_key_type; 2300 } 2301 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2302 // still forward event to allow dismiss of pairing dialog 2303 break; 2304 } 2305 2306 case HCI_EVENT_PIN_CODE_REQUEST: 2307 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2308 // non-bondable mode: pin code negative reply will be sent 2309 if (!hci_stack->bondable){ 2310 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2311 hci_run(); 2312 return; 2313 } 2314 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2315 if (!hci_stack->link_key_db) break; 2316 hci_event_pin_code_request_get_bd_addr(packet, addr); 2317 hci_stack->link_key_db->delete_link_key(addr); 2318 break; 2319 2320 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2321 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2322 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2323 break; 2324 2325 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2326 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2327 if (!hci_stack->ssp_auto_accept) break; 2328 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2329 break; 2330 2331 case HCI_EVENT_USER_PASSKEY_REQUEST: 2332 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2333 if (!hci_stack->ssp_auto_accept) break; 2334 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2335 break; 2336 case HCI_EVENT_MODE_CHANGE: 2337 handle = hci_event_mode_change_get_handle(packet); 2338 conn = hci_connection_for_handle(handle); 2339 if (!conn) break; 2340 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2341 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2342 break; 2343 #endif 2344 2345 case HCI_EVENT_ENCRYPTION_CHANGE: 2346 handle = little_endian_read_16(packet, 3); 2347 conn = hci_connection_for_handle(handle); 2348 if (!conn) break; 2349 if (packet[2] == 0) { 2350 if (packet[5]){ 2351 if (hci_is_le_connection(conn)){ 2352 // For LE, we accept connection as encrypted 2353 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2354 } 2355 #ifdef ENABLE_CLASSIC 2356 else { 2357 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2358 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2359 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2360 } else { 2361 // if not, pretend everything is perfect 2362 conn->encryption_key_size = 16; 2363 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2364 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2365 } 2366 } 2367 #endif 2368 } else { 2369 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2370 } 2371 } 2372 2373 break; 2374 2375 #ifdef ENABLE_CLASSIC 2376 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2377 handle = little_endian_read_16(packet, 3); 2378 conn = hci_connection_for_handle(handle); 2379 if (!conn) break; 2380 2381 // dedicated bonding: send result and disconnect 2382 if (conn->bonding_flags & BONDING_DEDICATED){ 2383 conn->bonding_flags &= ~BONDING_DEDICATED; 2384 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2385 conn->bonding_status = packet[2]; 2386 break; 2387 } 2388 2389 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2390 // link key sufficient for requested security 2391 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2392 break; 2393 } 2394 // not enough 2395 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2396 break; 2397 #endif 2398 2399 // HCI_EVENT_DISCONNECTION_COMPLETE 2400 // has been split, to first notify stack before shutting connection down 2401 // see end of function, too. 2402 case HCI_EVENT_DISCONNECTION_COMPLETE: 2403 if (packet[2]) break; // status != 0 2404 handle = little_endian_read_16(packet, 3); 2405 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2406 if (hci_stack->acl_fragmentation_total_size > 0) { 2407 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2408 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2409 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2410 hci_stack->acl_fragmentation_total_size = 0; 2411 hci_stack->acl_fragmentation_pos = 0; 2412 if (release_buffer){ 2413 hci_release_packet_buffer(); 2414 } 2415 } 2416 } 2417 2418 conn = hci_connection_for_handle(handle); 2419 if (!conn) break; 2420 // mark connection for shutdown 2421 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2422 2423 // emit dedicatd bonding event 2424 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2425 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2426 } 2427 2428 #ifdef ENABLE_BLE 2429 #ifdef ENABLE_LE_PERIPHERAL 2430 // re-enable advertisements for le connections if active 2431 if (hci_is_le_connection(conn)){ 2432 hci_reenable_advertisements_if_needed(); 2433 } 2434 #endif 2435 #endif 2436 break; 2437 2438 case HCI_EVENT_HARDWARE_ERROR: 2439 log_error("Hardware Error: 0x%02x", packet[2]); 2440 if (hci_stack->hardware_error_callback){ 2441 (*hci_stack->hardware_error_callback)(packet[2]); 2442 } else { 2443 // if no special requests, just reboot stack 2444 hci_power_control_off(); 2445 hci_power_control_on(); 2446 } 2447 break; 2448 2449 #ifdef ENABLE_CLASSIC 2450 case HCI_EVENT_ROLE_CHANGE: 2451 if (packet[2]) break; // status != 0 2452 reverse_bd_addr(&packet[3], addr); 2453 addr_type = BD_ADDR_TYPE_ACL; 2454 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2455 if (!conn) break; 2456 conn->role = packet[9]; 2457 break; 2458 #endif 2459 2460 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2461 // release packet buffer only for asynchronous transport and if there are not further fragements 2462 if (hci_transport_synchronous()) { 2463 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2464 return; // instead of break: to avoid re-entering hci_run() 2465 } 2466 hci_stack->acl_fragmentation_tx_active = 0; 2467 if (hci_stack->acl_fragmentation_total_size) break; 2468 hci_release_packet_buffer(); 2469 2470 // L2CAP receives this event via the hci_emit_event below 2471 2472 #ifdef ENABLE_CLASSIC 2473 // For SCO, we do the can_send_now_check here 2474 hci_notify_if_sco_can_send_now(); 2475 #endif 2476 break; 2477 2478 #ifdef ENABLE_CLASSIC 2479 case HCI_EVENT_SCO_CAN_SEND_NOW: 2480 // For SCO, we do the can_send_now_check here 2481 hci_stack->sco_can_send_now = 1; 2482 hci_notify_if_sco_can_send_now(); 2483 return; 2484 2485 // explode inquriy results for easier consumption 2486 case HCI_EVENT_INQUIRY_RESULT: 2487 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2488 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2489 gap_inquiry_explode(packet, size); 2490 break; 2491 #endif 2492 2493 #ifdef ENABLE_BLE 2494 case HCI_EVENT_LE_META: 2495 switch (packet[2]){ 2496 #ifdef ENABLE_LE_CENTRAL 2497 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2498 // log_info("advertising report received"); 2499 if (!hci_stack->le_scanning_enabled) break; 2500 le_handle_advertisement_report(packet, size); 2501 break; 2502 #endif 2503 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2504 // Connection management 2505 reverse_bd_addr(&packet[8], addr); 2506 addr_type = (bd_addr_type_t)packet[7]; 2507 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2508 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2509 2510 #ifdef ENABLE_LE_CENTRAL 2511 // if auto-connect, remove from whitelist in both roles 2512 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2513 hci_remove_from_whitelist(addr_type, addr); 2514 } 2515 // handle error: error is reported only to the initiator -> outgoing connection 2516 if (packet[3]){ 2517 2518 // handle cancelled outgoing connection 2519 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2520 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2521 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2522 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2523 conn = gap_get_outgoing_connection(); 2524 } 2525 2526 // outgoing connection establishment is done 2527 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2528 // remove entry 2529 if (conn){ 2530 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2531 btstack_memory_hci_connection_free( conn ); 2532 } 2533 break; 2534 } 2535 #endif 2536 // on success, both hosts receive connection complete event 2537 if (packet[6] == HCI_ROLE_MASTER){ 2538 #ifdef ENABLE_LE_CENTRAL 2539 // if we're master, it was an outgoing connection and we're done with it 2540 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2541 #endif 2542 } else { 2543 #ifdef ENABLE_LE_PERIPHERAL 2544 // if we're slave, it was an incoming connection, advertisements have stopped 2545 hci_stack->le_advertisements_active = 0; 2546 #endif 2547 } 2548 // LE connections are auto-accepted, so just create a connection if there isn't one already 2549 if (!conn){ 2550 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2551 } 2552 // no memory, sorry. 2553 if (!conn){ 2554 break; 2555 } 2556 2557 conn->state = OPEN; 2558 conn->role = packet[6]; 2559 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2560 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2561 2562 #ifdef ENABLE_LE_PERIPHERAL 2563 if (packet[6] == HCI_ROLE_SLAVE){ 2564 hci_reenable_advertisements_if_needed(); 2565 } 2566 #endif 2567 2568 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2569 2570 // restart timer 2571 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2572 // btstack_run_loop_add_timer(&conn->timeout); 2573 2574 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2575 2576 hci_emit_nr_connections_changed(); 2577 break; 2578 2579 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2580 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2581 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2582 conn = hci_connection_for_handle(handle); 2583 if (!conn) break; 2584 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2585 break; 2586 2587 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2588 // connection 2589 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2590 conn = hci_connection_for_handle(handle); 2591 if (conn) { 2592 // read arguments 2593 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2594 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2595 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2596 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2597 2598 // validate against current connection parameter range 2599 le_connection_parameter_range_t existing_range; 2600 gap_get_connection_parameter_range(&existing_range); 2601 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2602 if (update_parameter){ 2603 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2604 conn->le_conn_interval_min = le_conn_interval_min; 2605 conn->le_conn_interval_max = le_conn_interval_max; 2606 conn->le_conn_latency = le_conn_latency; 2607 conn->le_supervision_timeout = le_supervision_timeout; 2608 } else { 2609 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2610 } 2611 } 2612 break; 2613 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2614 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2615 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2616 conn = hci_connection_for_handle(handle); 2617 if (conn) { 2618 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2619 } 2620 break; 2621 #endif 2622 default: 2623 break; 2624 } 2625 break; 2626 #endif 2627 case HCI_EVENT_VENDOR_SPECIFIC: 2628 // Vendor specific commands often create vendor specific event instead of num completed packets 2629 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2630 switch (hci_stack->manufacturer){ 2631 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2632 hci_stack->num_cmd_packets = 1; 2633 break; 2634 default: 2635 break; 2636 } 2637 break; 2638 default: 2639 break; 2640 } 2641 2642 handle_event_for_current_stack_state(packet, size); 2643 2644 // notify upper stack 2645 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2646 2647 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2648 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2649 if (!packet[2]){ 2650 handle = little_endian_read_16(packet, 3); 2651 hci_connection_t * aConn = hci_connection_for_handle(handle); 2652 if (aConn) { 2653 // discard connection if app did not trigger a reconnect in the event handler 2654 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2655 hci_shutdown_connection(aConn); 2656 } 2657 } 2658 } 2659 } 2660 2661 // execute main loop 2662 hci_run(); 2663 } 2664 2665 #ifdef ENABLE_CLASSIC 2666 2667 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2668 static void sco_schedule_tx(hci_connection_t * conn); 2669 2670 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2671 log_debug("SCO TX Timeout"); 2672 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2673 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2674 if (!conn) return; 2675 2676 // trigger send 2677 conn->sco_tx_ready = 1; 2678 // extra packet if CVSD but SCO buffer is too short 2679 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2680 conn->sco_tx_ready++; 2681 } 2682 hci_notify_if_sco_can_send_now(); 2683 } 2684 2685 2686 #define SCO_TX_AFTER_RX_MS (6) 2687 2688 static void sco_schedule_tx(hci_connection_t * conn){ 2689 2690 uint32_t now = btstack_run_loop_get_time_ms(); 2691 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2692 int time_delta_ms = sco_tx_ms - now; 2693 2694 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2695 2696 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2697 btstack_run_loop_set_timer(timer, time_delta_ms); 2698 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2699 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2700 btstack_run_loop_add_timer(timer); 2701 } 2702 2703 static void sco_handler(uint8_t * packet, uint16_t size){ 2704 // lookup connection struct 2705 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2706 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2707 if (!conn) return; 2708 2709 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2710 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2711 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2712 packet[2] = 0x3c; 2713 memmove(&packet[3], &packet[23], 63); 2714 size = 63; 2715 } 2716 } 2717 2718 if (hci_have_usb_transport()){ 2719 // Nothing to do 2720 } else { 2721 // 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); 2722 if (hci_stack->synchronous_flow_control_enabled == 0){ 2723 uint32_t now = btstack_run_loop_get_time_ms(); 2724 2725 if (!conn->sco_rx_valid){ 2726 // ignore first 10 packets 2727 conn->sco_rx_count++; 2728 // log_debug("sco rx count %u", conn->sco_rx_count); 2729 if (conn->sco_rx_count == 10) { 2730 // use first timestamp as is and pretent it just started 2731 conn->sco_rx_ms = now; 2732 conn->sco_rx_valid = 1; 2733 conn->sco_rx_count = 0; 2734 sco_schedule_tx(conn); 2735 } 2736 } else { 2737 // track expected arrival timme 2738 conn->sco_rx_count++; 2739 conn->sco_rx_ms += 7; 2740 int delta = (int32_t) (now - conn->sco_rx_ms); 2741 if (delta > 0){ 2742 conn->sco_rx_ms++; 2743 } 2744 // log_debug("sco rx %u", conn->sco_rx_ms); 2745 sco_schedule_tx(conn); 2746 } 2747 } 2748 } 2749 // deliver to app 2750 if (hci_stack->sco_packet_handler) { 2751 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2752 } 2753 2754 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2755 conn->num_packets_completed++; 2756 hci_stack->host_completed_packets = 1; 2757 hci_run(); 2758 #endif 2759 } 2760 #endif 2761 2762 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2763 hci_dump_packet(packet_type, 1, packet, size); 2764 switch (packet_type) { 2765 case HCI_EVENT_PACKET: 2766 event_handler(packet, size); 2767 break; 2768 case HCI_ACL_DATA_PACKET: 2769 acl_handler(packet, size); 2770 break; 2771 #ifdef ENABLE_CLASSIC 2772 case HCI_SCO_DATA_PACKET: 2773 sco_handler(packet, size); 2774 break; 2775 #endif 2776 default: 2777 break; 2778 } 2779 } 2780 2781 /** 2782 * @brief Add event packet handler. 2783 */ 2784 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2785 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2786 } 2787 2788 2789 /** Register HCI packet handlers */ 2790 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2791 hci_stack->acl_packet_handler = handler; 2792 } 2793 2794 #ifdef ENABLE_CLASSIC 2795 /** 2796 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2797 */ 2798 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2799 hci_stack->sco_packet_handler = handler; 2800 } 2801 #endif 2802 2803 static void hci_state_reset(void){ 2804 // no connections yet 2805 hci_stack->connections = NULL; 2806 2807 // keep discoverable/connectable as this has been requested by the client(s) 2808 // hci_stack->discoverable = 0; 2809 // hci_stack->connectable = 0; 2810 // hci_stack->bondable = 1; 2811 // hci_stack->own_addr_type = 0; 2812 2813 // buffer is free 2814 hci_stack->hci_packet_buffer_reserved = 0; 2815 2816 // no pending cmds 2817 hci_stack->decline_reason = 0; 2818 hci_stack->new_scan_enable_value = 0xff; 2819 2820 // LE 2821 #ifdef ENABLE_BLE 2822 memset(hci_stack->le_random_address, 0, 6); 2823 hci_stack->le_random_address_set = 0; 2824 #endif 2825 #ifdef ENABLE_LE_CENTRAL 2826 hci_stack->le_scanning_active = 0; 2827 hci_stack->le_scan_type = 0xff; 2828 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2829 hci_stack->le_whitelist = 0; 2830 hci_stack->le_whitelist_capacity = 0; 2831 #endif 2832 } 2833 2834 #ifdef ENABLE_CLASSIC 2835 /** 2836 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2837 */ 2838 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2839 // store and open remote device db 2840 hci_stack->link_key_db = link_key_db; 2841 if (hci_stack->link_key_db) { 2842 hci_stack->link_key_db->open(); 2843 } 2844 } 2845 #endif 2846 2847 void hci_init(const hci_transport_t *transport, const void *config){ 2848 2849 #ifdef HAVE_MALLOC 2850 if (!hci_stack) { 2851 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2852 } 2853 #else 2854 hci_stack = &hci_stack_static; 2855 #endif 2856 memset(hci_stack, 0, sizeof(hci_stack_t)); 2857 2858 // reference to use transport layer implementation 2859 hci_stack->hci_transport = transport; 2860 2861 // reference to used config 2862 hci_stack->config = config; 2863 2864 // setup pointer for outgoing packet buffer 2865 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2866 2867 // max acl payload size defined in config.h 2868 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2869 2870 // register packet handlers with transport 2871 transport->register_packet_handler(&packet_handler); 2872 2873 hci_stack->state = HCI_STATE_OFF; 2874 2875 // class of device 2876 hci_stack->class_of_device = 0x007a020c; // Smartphone 2877 2878 // bondable by default 2879 hci_stack->bondable = 1; 2880 2881 #ifdef ENABLE_CLASSIC 2882 // classic name 2883 hci_stack->local_name = default_classic_name; 2884 2885 // Master slave policy 2886 hci_stack->master_slave_policy = 1; 2887 2888 // Allow Role Switch 2889 hci_stack->allow_role_switch = 1; 2890 2891 // Default / minimum security level = 2 2892 hci_stack->gap_security_level = LEVEL_2; 2893 2894 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2895 hci_stack->gap_required_encyrption_key_size = 16; 2896 #endif 2897 2898 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2899 hci_stack->ssp_enable = 1; 2900 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2901 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2902 hci_stack->ssp_auto_accept = 1; 2903 2904 // voice setting - signed 16 bit pcm data with CVSD over the air 2905 hci_stack->sco_voice_setting = 0x60; 2906 2907 #ifdef ENABLE_LE_CENTRAL 2908 // connection parameter to use for outgoing connections 2909 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2910 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2911 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2912 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2913 hci_stack->le_connection_latency = 4; // 4 2914 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2915 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2916 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2917 2918 // default LE Scanning 2919 hci_stack->le_scan_interval = 0x1e0; 2920 hci_stack->le_scan_window = 0x30; 2921 #endif 2922 2923 #ifdef ENABLE_LE_PERIPHERAL 2924 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2925 #endif 2926 2927 // connection parameter range used to answer connection parameter update requests in l2cap 2928 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2929 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2930 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2931 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2932 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2933 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2934 2935 hci_state_reset(); 2936 } 2937 2938 /** 2939 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2940 */ 2941 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2942 hci_stack->chipset = chipset_driver; 2943 2944 // reset chipset driver - init is also called on power_up 2945 if (hci_stack->chipset && hci_stack->chipset->init){ 2946 hci_stack->chipset->init(hci_stack->config); 2947 } 2948 } 2949 2950 /** 2951 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2952 */ 2953 void hci_set_control(const btstack_control_t *hardware_control){ 2954 // references to used control implementation 2955 hci_stack->control = hardware_control; 2956 // init with transport config 2957 hardware_control->init(hci_stack->config); 2958 } 2959 2960 void hci_close(void){ 2961 // close remote device db 2962 if (hci_stack->link_key_db) { 2963 hci_stack->link_key_db->close(); 2964 } 2965 2966 btstack_linked_list_iterator_t lit; 2967 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2968 while (btstack_linked_list_iterator_has_next(&lit)){ 2969 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2970 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2971 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2972 hci_shutdown_connection(connection); 2973 } 2974 2975 hci_power_control(HCI_POWER_OFF); 2976 2977 #ifdef HAVE_MALLOC 2978 free(hci_stack); 2979 #endif 2980 hci_stack = NULL; 2981 } 2982 2983 #ifdef ENABLE_CLASSIC 2984 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2985 // validate ranage and set 2986 if (encryption_key_size < 7) return; 2987 if (encryption_key_size > 16) return; 2988 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2989 } 2990 2991 void gap_set_security_level(gap_security_level_t security_level){ 2992 hci_stack->gap_security_level = security_level; 2993 } 2994 2995 gap_security_level_t gap_get_security_level(void){ 2996 return hci_stack->gap_security_level; 2997 } 2998 #endif 2999 3000 #ifdef ENABLE_CLASSIC 3001 void gap_set_class_of_device(uint32_t class_of_device){ 3002 hci_stack->class_of_device = class_of_device; 3003 } 3004 3005 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3006 hci_stack->default_link_policy_settings = default_link_policy_settings; 3007 } 3008 3009 void gap_set_allow_role_switch(bool allow_role_switch){ 3010 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3011 } 3012 3013 uint8_t hci_get_allow_role_switch(void){ 3014 return hci_stack->allow_role_switch; 3015 } 3016 3017 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3018 hci_stack->link_supervision_timeout = link_supervision_timeout; 3019 } 3020 3021 void hci_disable_l2cap_timeout_check(void){ 3022 disable_l2cap_timeouts = 1; 3023 } 3024 #endif 3025 3026 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3027 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3028 void hci_set_bd_addr(bd_addr_t addr){ 3029 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3030 hci_stack->custom_bd_addr_set = 1; 3031 } 3032 #endif 3033 3034 // State-Module-Driver overview 3035 // state module low-level 3036 // HCI_STATE_OFF off close 3037 // HCI_STATE_INITIALIZING, on open 3038 // HCI_STATE_WORKING, on open 3039 // HCI_STATE_HALTING, on open 3040 // HCI_STATE_SLEEPING, off/sleep close 3041 // HCI_STATE_FALLING_ASLEEP on open 3042 3043 static int hci_power_control_on(void){ 3044 3045 // power on 3046 int err = 0; 3047 if (hci_stack->control && hci_stack->control->on){ 3048 err = (*hci_stack->control->on)(); 3049 } 3050 if (err){ 3051 log_error( "POWER_ON failed"); 3052 hci_emit_hci_open_failed(); 3053 return err; 3054 } 3055 3056 // int chipset driver 3057 if (hci_stack->chipset && hci_stack->chipset->init){ 3058 hci_stack->chipset->init(hci_stack->config); 3059 } 3060 3061 // init transport 3062 if (hci_stack->hci_transport->init){ 3063 hci_stack->hci_transport->init(hci_stack->config); 3064 } 3065 3066 // open transport 3067 err = hci_stack->hci_transport->open(); 3068 if (err){ 3069 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3070 if (hci_stack->control && hci_stack->control->off){ 3071 (*hci_stack->control->off)(); 3072 } 3073 hci_emit_hci_open_failed(); 3074 return err; 3075 } 3076 return 0; 3077 } 3078 3079 static void hci_power_control_off(void){ 3080 3081 log_info("hci_power_control_off"); 3082 3083 // close low-level device 3084 hci_stack->hci_transport->close(); 3085 3086 log_info("hci_power_control_off - hci_transport closed"); 3087 3088 // power off 3089 if (hci_stack->control && hci_stack->control->off){ 3090 (*hci_stack->control->off)(); 3091 } 3092 3093 log_info("hci_power_control_off - control closed"); 3094 3095 hci_stack->state = HCI_STATE_OFF; 3096 } 3097 3098 static void hci_power_control_sleep(void){ 3099 3100 log_info("hci_power_control_sleep"); 3101 3102 #if 0 3103 // don't close serial port during sleep 3104 3105 // close low-level device 3106 hci_stack->hci_transport->close(hci_stack->config); 3107 #endif 3108 3109 // sleep mode 3110 if (hci_stack->control && hci_stack->control->sleep){ 3111 (*hci_stack->control->sleep)(); 3112 } 3113 3114 hci_stack->state = HCI_STATE_SLEEPING; 3115 } 3116 3117 static int hci_power_control_wake(void){ 3118 3119 log_info("hci_power_control_wake"); 3120 3121 // wake on 3122 if (hci_stack->control && hci_stack->control->wake){ 3123 (*hci_stack->control->wake)(); 3124 } 3125 3126 #if 0 3127 // open low-level device 3128 int err = hci_stack->hci_transport->open(hci_stack->config); 3129 if (err){ 3130 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3131 if (hci_stack->control && hci_stack->control->off){ 3132 (*hci_stack->control->off)(); 3133 } 3134 hci_emit_hci_open_failed(); 3135 return err; 3136 } 3137 #endif 3138 3139 return 0; 3140 } 3141 3142 static void hci_power_transition_to_initializing(void){ 3143 // set up state machine 3144 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3145 hci_stack->hci_packet_buffer_reserved = 0; 3146 hci_stack->state = HCI_STATE_INITIALIZING; 3147 hci_stack->substate = HCI_INIT_SEND_RESET; 3148 } 3149 3150 int hci_power_control(HCI_POWER_MODE power_mode){ 3151 3152 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3153 3154 int err = 0; 3155 switch (hci_stack->state){ 3156 3157 case HCI_STATE_OFF: 3158 switch (power_mode){ 3159 case HCI_POWER_ON: 3160 err = hci_power_control_on(); 3161 if (err) { 3162 log_error("hci_power_control_on() error %d", err); 3163 return err; 3164 } 3165 hci_power_transition_to_initializing(); 3166 break; 3167 case HCI_POWER_OFF: 3168 // do nothing 3169 break; 3170 case HCI_POWER_SLEEP: 3171 // do nothing (with SLEEP == OFF) 3172 break; 3173 } 3174 break; 3175 3176 case HCI_STATE_INITIALIZING: 3177 switch (power_mode){ 3178 case HCI_POWER_ON: 3179 // do nothing 3180 break; 3181 case HCI_POWER_OFF: 3182 // no connections yet, just turn it off 3183 hci_power_control_off(); 3184 break; 3185 case HCI_POWER_SLEEP: 3186 // no connections yet, just turn it off 3187 hci_power_control_sleep(); 3188 break; 3189 } 3190 break; 3191 3192 case HCI_STATE_WORKING: 3193 switch (power_mode){ 3194 case HCI_POWER_ON: 3195 // do nothing 3196 break; 3197 case HCI_POWER_OFF: 3198 // see hci_run 3199 hci_stack->state = HCI_STATE_HALTING; 3200 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3201 break; 3202 case HCI_POWER_SLEEP: 3203 // see hci_run 3204 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3205 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3206 break; 3207 } 3208 break; 3209 3210 case HCI_STATE_HALTING: 3211 switch (power_mode){ 3212 case HCI_POWER_ON: 3213 hci_power_transition_to_initializing(); 3214 break; 3215 case HCI_POWER_OFF: 3216 // do nothing 3217 break; 3218 case HCI_POWER_SLEEP: 3219 // see hci_run 3220 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3221 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3222 break; 3223 } 3224 break; 3225 3226 case HCI_STATE_FALLING_ASLEEP: 3227 switch (power_mode){ 3228 case HCI_POWER_ON: 3229 3230 #ifdef HAVE_PLATFORM_IPHONE_OS 3231 // nothing to do, if H4 supports power management 3232 if (btstack_control_iphone_power_management_enabled()){ 3233 hci_stack->state = HCI_STATE_INITIALIZING; 3234 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3235 break; 3236 } 3237 #endif 3238 hci_power_transition_to_initializing(); 3239 break; 3240 case HCI_POWER_OFF: 3241 // see hci_run 3242 hci_stack->state = HCI_STATE_HALTING; 3243 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3244 break; 3245 case HCI_POWER_SLEEP: 3246 // do nothing 3247 break; 3248 } 3249 break; 3250 3251 case HCI_STATE_SLEEPING: 3252 switch (power_mode){ 3253 case HCI_POWER_ON: 3254 3255 #ifdef HAVE_PLATFORM_IPHONE_OS 3256 // nothing to do, if H4 supports power management 3257 if (btstack_control_iphone_power_management_enabled()){ 3258 hci_stack->state = HCI_STATE_INITIALIZING; 3259 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3260 hci_update_scan_enable(); 3261 break; 3262 } 3263 #endif 3264 err = hci_power_control_wake(); 3265 if (err) return err; 3266 hci_power_transition_to_initializing(); 3267 break; 3268 case HCI_POWER_OFF: 3269 hci_stack->state = HCI_STATE_HALTING; 3270 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3271 break; 3272 case HCI_POWER_SLEEP: 3273 // do nothing 3274 break; 3275 } 3276 break; 3277 } 3278 3279 // create internal event 3280 hci_emit_state(); 3281 3282 // trigger next/first action 3283 hci_run(); 3284 3285 return 0; 3286 } 3287 3288 3289 #ifdef ENABLE_CLASSIC 3290 3291 static void hci_update_scan_enable(void){ 3292 // 2 = page scan, 1 = inq scan 3293 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3294 hci_run(); 3295 } 3296 3297 void gap_discoverable_control(uint8_t enable){ 3298 if (enable) enable = 1; // normalize argument 3299 3300 if (hci_stack->discoverable == enable){ 3301 hci_emit_discoverable_enabled(hci_stack->discoverable); 3302 return; 3303 } 3304 3305 hci_stack->discoverable = enable; 3306 hci_update_scan_enable(); 3307 } 3308 3309 void gap_connectable_control(uint8_t enable){ 3310 if (enable) enable = 1; // normalize argument 3311 3312 // don't emit event 3313 if (hci_stack->connectable == enable) return; 3314 3315 hci_stack->connectable = enable; 3316 hci_update_scan_enable(); 3317 } 3318 #endif 3319 3320 void gap_local_bd_addr(bd_addr_t address_buffer){ 3321 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3322 } 3323 3324 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3325 static void hci_host_num_completed_packets(void){ 3326 3327 // create packet manually as arrays are not supported and num_commands should not get reduced 3328 hci_reserve_packet_buffer(); 3329 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3330 3331 uint16_t size = 0; 3332 uint16_t num_handles = 0; 3333 packet[size++] = 0x35; 3334 packet[size++] = 0x0c; 3335 size++; // skip param len 3336 size++; // skip num handles 3337 3338 // add { handle, packets } entries 3339 btstack_linked_item_t * it; 3340 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3341 hci_connection_t * connection = (hci_connection_t *) it; 3342 if (connection->num_packets_completed){ 3343 little_endian_store_16(packet, size, connection->con_handle); 3344 size += 2; 3345 little_endian_store_16(packet, size, connection->num_packets_completed); 3346 size += 2; 3347 // 3348 num_handles++; 3349 connection->num_packets_completed = 0; 3350 } 3351 } 3352 3353 packet[2] = size - 3; 3354 packet[3] = num_handles; 3355 3356 hci_stack->host_completed_packets = 0; 3357 3358 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3359 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3360 3361 // release packet buffer for synchronous transport implementations 3362 if (hci_transport_synchronous()){ 3363 hci_release_packet_buffer(); 3364 hci_emit_transport_packet_sent(); 3365 } 3366 } 3367 #endif 3368 3369 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3370 UNUSED(ds); 3371 hci_stack->substate = HCI_HALTING_CLOSE; 3372 // allow packet handlers to defer final shutdown 3373 hci_emit_state(); 3374 hci_run(); 3375 } 3376 3377 static bool hci_run_acl_fragments(void){ 3378 if (hci_stack->acl_fragmentation_total_size > 0) { 3379 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3380 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3381 if (connection) { 3382 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3383 hci_send_acl_packet_fragments(connection); 3384 return true; 3385 } 3386 } else { 3387 // connection gone -> discard further fragments 3388 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3389 hci_stack->acl_fragmentation_total_size = 0; 3390 hci_stack->acl_fragmentation_pos = 0; 3391 } 3392 } 3393 return false; 3394 } 3395 3396 #ifdef ENABLE_CLASSIC 3397 static bool hci_run_general_gap_classic(void){ 3398 3399 // decline incoming connections 3400 if (hci_stack->decline_reason){ 3401 uint8_t reason = hci_stack->decline_reason; 3402 hci_stack->decline_reason = 0; 3403 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3404 return true; 3405 } 3406 // send scan enable 3407 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3408 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3409 hci_stack->new_scan_enable_value = 0xff; 3410 return true; 3411 } 3412 // start/stop inquiry 3413 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3414 uint8_t duration = hci_stack->inquiry_state; 3415 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3416 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3417 return true; 3418 } 3419 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3420 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3421 hci_send_cmd(&hci_inquiry_cancel); 3422 return true; 3423 } 3424 // remote name request 3425 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3426 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3427 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3428 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3429 return true; 3430 } 3431 // pairing 3432 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3433 uint8_t state = hci_stack->gap_pairing_state; 3434 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3435 switch (state){ 3436 case GAP_PAIRING_STATE_SEND_PIN: 3437 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); 3438 break; 3439 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3440 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3441 break; 3442 case GAP_PAIRING_STATE_SEND_PASSKEY: 3443 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3444 break; 3445 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3446 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3447 break; 3448 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3449 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3450 break; 3451 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3452 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3453 break; 3454 default: 3455 break; 3456 } 3457 return true; 3458 } 3459 return false; 3460 } 3461 #endif 3462 3463 #ifdef ENABLE_BLE 3464 static bool hci_run_general_gap_le(void){ 3465 3466 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3467 3468 if (hci_stack->state != HCI_STATE_WORKING) return false; 3469 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3470 3471 #ifdef ENABLE_LE_CENTRAL 3472 // parameter change requires scanning to be stopped first 3473 if (hci_stack->le_scan_type != 0xff) { 3474 if (hci_stack->le_scanning_active){ 3475 hci_stack->le_scanning_active = 0; 3476 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3477 } else { 3478 int scan_type = (int) hci_stack->le_scan_type; 3479 hci_stack->le_scan_type = 0xff; 3480 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); 3481 } 3482 return true; 3483 } 3484 // finally, we can enable/disable le scan 3485 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3486 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3487 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3488 return true; 3489 } 3490 #endif 3491 #ifdef ENABLE_LE_PERIPHERAL 3492 // le advertisement control 3493 if (hci_stack->le_advertisements_todo){ 3494 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3495 } 3496 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3497 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3498 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3499 return true; 3500 } 3501 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3502 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3503 hci_send_cmd(&hci_le_set_advertising_parameters, 3504 hci_stack->le_advertisements_interval_min, 3505 hci_stack->le_advertisements_interval_max, 3506 hci_stack->le_advertisements_type, 3507 hci_stack->le_own_addr_type, 3508 hci_stack->le_advertisements_direct_address_type, 3509 hci_stack->le_advertisements_direct_address, 3510 hci_stack->le_advertisements_channel_map, 3511 hci_stack->le_advertisements_filter_policy); 3512 return true; 3513 } 3514 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3515 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3516 uint8_t adv_data_clean[31]; 3517 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3518 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3519 hci_stack->le_advertisements_data_len); 3520 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3521 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3522 return true; 3523 } 3524 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3525 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3526 uint8_t scan_data_clean[31]; 3527 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3528 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3529 hci_stack->le_scan_response_data_len); 3530 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3531 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3532 return true; 3533 } 3534 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3535 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3536 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3537 return true; 3538 } 3539 #endif 3540 3541 #ifdef ENABLE_LE_CENTRAL 3542 // 3543 // LE Whitelist Management 3544 // 3545 3546 // check if whitelist needs modification 3547 btstack_linked_list_iterator_t lit; 3548 int modification_pending = 0; 3549 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3550 while (btstack_linked_list_iterator_has_next(&lit)){ 3551 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3552 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3553 modification_pending = 1; 3554 break; 3555 } 3556 } 3557 3558 if (modification_pending){ 3559 // stop connnecting if modification pending 3560 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3561 hci_send_cmd(&hci_le_create_connection_cancel); 3562 return true; 3563 } 3564 3565 // add/remove entries 3566 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3567 while (btstack_linked_list_iterator_has_next(&lit)){ 3568 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3569 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3570 entry->state = LE_WHITELIST_ON_CONTROLLER; 3571 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3572 return true; 3573 } 3574 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3575 bd_addr_t address; 3576 bd_addr_type_t address_type = entry->address_type; 3577 (void)memcpy(address, entry->address, 6); 3578 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3579 btstack_memory_whitelist_entry_free(entry); 3580 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3581 return true; 3582 } 3583 } 3584 } 3585 3586 // start connecting 3587 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3588 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3589 bd_addr_t null_addr; 3590 memset(null_addr, 0, 6); 3591 hci_send_cmd(&hci_le_create_connection, 3592 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3593 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3594 1, // use whitelist 3595 0, // peer address type 3596 null_addr, // peer bd addr 3597 hci_stack->le_own_addr_type, // our addr type: 3598 hci_stack->le_connection_interval_min, // conn interval min 3599 hci_stack->le_connection_interval_max, // conn interval max 3600 hci_stack->le_connection_latency, // conn latency 3601 hci_stack->le_supervision_timeout, // conn latency 3602 hci_stack->le_minimum_ce_length, // min ce length 3603 hci_stack->le_maximum_ce_length // max ce length 3604 ); 3605 return true; 3606 } 3607 #endif 3608 return false; 3609 } 3610 #endif 3611 3612 static bool hci_run_general_pending_commmands(void){ 3613 btstack_linked_item_t * it; 3614 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3615 hci_connection_t * connection = (hci_connection_t *) it; 3616 3617 switch(connection->state){ 3618 case SEND_CREATE_CONNECTION: 3619 switch(connection->address_type){ 3620 #ifdef ENABLE_CLASSIC 3621 case BD_ADDR_TYPE_ACL: 3622 log_info("sending hci_create_connection"); 3623 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3624 break; 3625 #endif 3626 default: 3627 #ifdef ENABLE_BLE 3628 #ifdef ENABLE_LE_CENTRAL 3629 // track outgoing connection 3630 hci_stack->outgoing_addr_type = connection->address_type; 3631 (void)memcpy(hci_stack->outgoing_addr, 3632 connection->address, 6); 3633 log_info("sending hci_le_create_connection"); 3634 hci_send_cmd(&hci_le_create_connection, 3635 hci_stack->le_connection_scan_interval, // conn scan interval 3636 hci_stack->le_connection_scan_window, // conn scan windows 3637 0, // don't use whitelist 3638 connection->address_type, // peer address type 3639 connection->address, // peer bd addr 3640 hci_stack->le_own_addr_type, // our addr type: 3641 hci_stack->le_connection_interval_min, // conn interval min 3642 hci_stack->le_connection_interval_max, // conn interval max 3643 hci_stack->le_connection_latency, // conn latency 3644 hci_stack->le_supervision_timeout, // conn latency 3645 hci_stack->le_minimum_ce_length, // min ce length 3646 hci_stack->le_maximum_ce_length // max ce length 3647 ); 3648 connection->state = SENT_CREATE_CONNECTION; 3649 #endif 3650 #endif 3651 break; 3652 } 3653 return true; 3654 3655 #ifdef ENABLE_CLASSIC 3656 case RECEIVED_CONNECTION_REQUEST: 3657 connection->role = HCI_ROLE_SLAVE; 3658 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3659 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3660 connection->state = ACCEPTED_CONNECTION_REQUEST; 3661 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3662 } 3663 return true; 3664 #endif 3665 3666 #ifdef ENABLE_BLE 3667 #ifdef ENABLE_LE_CENTRAL 3668 case SEND_CANCEL_CONNECTION: 3669 connection->state = SENT_CANCEL_CONNECTION; 3670 hci_send_cmd(&hci_le_create_connection_cancel); 3671 return true; 3672 #endif 3673 #endif 3674 case SEND_DISCONNECT: 3675 connection->state = SENT_DISCONNECT; 3676 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3677 return true; 3678 3679 default: 3680 break; 3681 } 3682 3683 // no further commands if connection is about to get shut down 3684 if (connection->state == SENT_DISCONNECT) continue; 3685 3686 if (connection->authentication_flags & READ_RSSI){ 3687 connectionClearAuthenticationFlags(connection, READ_RSSI); 3688 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3689 return true; 3690 } 3691 3692 #ifdef ENABLE_CLASSIC 3693 3694 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3695 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3696 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3697 return true; 3698 } 3699 3700 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3701 log_info("responding to link key request"); 3702 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3703 link_key_t link_key; 3704 link_key_type_t link_key_type; 3705 if ( hci_stack->link_key_db 3706 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3707 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3708 connection->link_key_type = link_key_type; 3709 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3710 } else { 3711 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3712 } 3713 return true; 3714 } 3715 3716 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3717 log_info("denying to pin request"); 3718 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3719 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3720 return true; 3721 } 3722 3723 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3724 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3725 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3726 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3727 // tweak authentication requirements 3728 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3729 if (connection->bonding_flags & BONDING_DEDICATED){ 3730 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3731 } 3732 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3733 authreq |= 1; 3734 } 3735 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3736 } else { 3737 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3738 } 3739 return true; 3740 } 3741 3742 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3743 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3744 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3745 return true; 3746 } 3747 3748 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3749 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3750 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3751 return true; 3752 } 3753 3754 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3755 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3756 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3757 return true; 3758 } 3759 3760 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3761 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3762 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3763 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3764 return true; 3765 } 3766 3767 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3768 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3769 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3770 return true; 3771 } 3772 3773 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3774 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3775 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3776 return true; 3777 } 3778 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3779 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3780 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3781 return true; 3782 } 3783 #endif 3784 3785 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3786 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3787 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3788 return true; 3789 } 3790 3791 #ifdef ENABLE_CLASSIC 3792 uint16_t sniff_min_interval; 3793 switch (connection->sniff_min_interval){ 3794 case 0: 3795 break; 3796 case 0xffff: 3797 connection->sniff_min_interval = 0; 3798 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3799 return true; 3800 default: 3801 sniff_min_interval = connection->sniff_min_interval; 3802 connection->sniff_min_interval = 0; 3803 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3804 return true; 3805 } 3806 #endif 3807 3808 #ifdef ENABLE_BLE 3809 switch (connection->le_con_parameter_update_state){ 3810 // response to L2CAP CON PARAMETER UPDATE REQUEST 3811 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3812 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3813 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3814 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3815 0x0000, 0xffff); 3816 return true; 3817 case CON_PARAMETER_UPDATE_REPLY: 3818 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3819 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3820 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3821 0x0000, 0xffff); 3822 return true; 3823 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3824 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3825 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3826 return true; 3827 default: 3828 break; 3829 } 3830 if (connection->le_phy_update_all_phys != 0xff){ 3831 uint8_t all_phys = connection->le_phy_update_all_phys; 3832 connection->le_phy_update_all_phys = 0xff; 3833 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); 3834 return true; 3835 } 3836 #endif 3837 } 3838 return false; 3839 } 3840 3841 static void hci_run(void){ 3842 3843 bool done; 3844 3845 // send continuation fragments first, as they block the prepared packet buffer 3846 done = hci_run_acl_fragments(); 3847 if (done) return; 3848 3849 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3850 // send host num completed packets next as they don't require num_cmd_packets > 0 3851 if (!hci_can_send_comand_packet_transport()) return; 3852 if (hci_stack->host_completed_packets){ 3853 hci_host_num_completed_packets(); 3854 return; 3855 } 3856 #endif 3857 3858 if (!hci_can_send_command_packet_now()) return; 3859 3860 // global/non-connection oriented commands 3861 3862 3863 #ifdef ENABLE_CLASSIC 3864 // general gap classic 3865 done = hci_run_general_gap_classic(); 3866 if (done) return; 3867 #endif 3868 3869 #ifdef ENABLE_BLE 3870 // general gap le 3871 done = hci_run_general_gap_le(); 3872 if (done) return; 3873 #endif 3874 3875 // send pending HCI commands 3876 done = hci_run_general_pending_commmands(); 3877 if (done) return; 3878 3879 // stack state sub statemachines 3880 hci_connection_t * connection; 3881 switch (hci_stack->state){ 3882 case HCI_STATE_INITIALIZING: 3883 hci_initializing_run(); 3884 break; 3885 3886 case HCI_STATE_HALTING: 3887 3888 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3889 switch (hci_stack->substate){ 3890 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3891 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3892 3893 #ifdef ENABLE_BLE 3894 #ifdef ENABLE_LE_CENTRAL 3895 // free whitelist entries 3896 { 3897 btstack_linked_list_iterator_t lit; 3898 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3899 while (btstack_linked_list_iterator_has_next(&lit)){ 3900 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3901 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3902 btstack_memory_whitelist_entry_free(entry); 3903 } 3904 } 3905 #endif 3906 #endif 3907 // close all open connections 3908 connection = (hci_connection_t *) hci_stack->connections; 3909 if (connection){ 3910 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3911 if (!hci_can_send_command_packet_now()) return; 3912 3913 // check state 3914 if (connection->state == SENT_DISCONNECT) return; 3915 connection->state = SENT_DISCONNECT; 3916 3917 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3918 3919 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3920 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3921 3922 // ... which would be ignored anyway as we shutdown (free) the connection now 3923 hci_shutdown_connection(connection); 3924 3925 // finally, send the disconnect command 3926 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3927 return; 3928 } 3929 3930 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3931 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3932 log_info("HCI_STATE_HALTING: wait 50 ms"); 3933 hci_stack->substate = HCI_HALTING_W4_TIMER; 3934 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3935 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3936 btstack_run_loop_add_timer(&hci_stack->timeout); 3937 break; 3938 } 3939 3940 /* fall through */ 3941 3942 case HCI_HALTING_CLOSE: 3943 log_info("HCI_STATE_HALTING, calling off"); 3944 3945 // switch mode 3946 hci_power_control_off(); 3947 3948 log_info("HCI_STATE_HALTING, emitting state"); 3949 hci_emit_state(); 3950 log_info("HCI_STATE_HALTING, done"); 3951 break; 3952 3953 case HCI_HALTING_W4_TIMER: 3954 // keep waiting 3955 3956 break; 3957 default: 3958 break; 3959 } 3960 3961 break; 3962 3963 case HCI_STATE_FALLING_ASLEEP: 3964 switch(hci_stack->substate) { 3965 case HCI_FALLING_ASLEEP_DISCONNECT: 3966 log_info("HCI_STATE_FALLING_ASLEEP"); 3967 // close all open connections 3968 connection = (hci_connection_t *) hci_stack->connections; 3969 3970 #ifdef HAVE_PLATFORM_IPHONE_OS 3971 // don't close connections, if H4 supports power management 3972 if (btstack_control_iphone_power_management_enabled()){ 3973 connection = NULL; 3974 } 3975 #endif 3976 if (connection){ 3977 3978 // send disconnect 3979 if (!hci_can_send_command_packet_now()) return; 3980 3981 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3982 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3983 3984 // send disconnected event right away - causes higher layer connections to get closed, too. 3985 hci_shutdown_connection(connection); 3986 return; 3987 } 3988 3989 if (hci_classic_supported()){ 3990 // disable page and inquiry scan 3991 if (!hci_can_send_command_packet_now()) return; 3992 3993 log_info("HCI_STATE_HALTING, disabling inq scans"); 3994 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3995 3996 // continue in next sub state 3997 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3998 break; 3999 } 4000 4001 /* fall through */ 4002 4003 case HCI_FALLING_ASLEEP_COMPLETE: 4004 log_info("HCI_STATE_HALTING, calling sleep"); 4005 #ifdef HAVE_PLATFORM_IPHONE_OS 4006 // don't actually go to sleep, if H4 supports power management 4007 if (btstack_control_iphone_power_management_enabled()){ 4008 // SLEEP MODE reached 4009 hci_stack->state = HCI_STATE_SLEEPING; 4010 hci_emit_state(); 4011 break; 4012 } 4013 #endif 4014 // switch mode 4015 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4016 hci_emit_state(); 4017 break; 4018 4019 default: 4020 break; 4021 } 4022 break; 4023 4024 default: 4025 break; 4026 } 4027 } 4028 4029 int hci_send_cmd_packet(uint8_t *packet, int size){ 4030 // house-keeping 4031 4032 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4033 hci_stack->loopback_mode = packet[3]; 4034 } 4035 4036 #ifdef ENABLE_CLASSIC 4037 bd_addr_t addr; 4038 hci_connection_t * conn; 4039 4040 // create_connection? 4041 if (IS_COMMAND(packet, hci_create_connection)){ 4042 reverse_bd_addr(&packet[3], addr); 4043 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4044 4045 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4046 if (!conn){ 4047 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4048 if (!conn){ 4049 // notify client that alloc failed 4050 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4051 return -1; // packet not sent to controller 4052 } 4053 conn->state = SEND_CREATE_CONNECTION; 4054 } 4055 log_info("conn state %u", conn->state); 4056 switch (conn->state){ 4057 // if connection active exists 4058 case OPEN: 4059 // and OPEN, emit connection complete command 4060 hci_emit_connection_complete(addr, conn->con_handle, 0); 4061 return -1; // packet not sent to controller 4062 case RECEIVED_DISCONNECTION_COMPLETE: 4063 // create connection triggered in disconnect complete event, let's do it now 4064 break; 4065 case SEND_CREATE_CONNECTION: 4066 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4067 break; 4068 default: 4069 // otherwise, just ignore as it is already in the open process 4070 return -1; // packet not sent to controller 4071 } 4072 conn->state = SENT_CREATE_CONNECTION; 4073 4074 // track outgoing connection 4075 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4076 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4077 } 4078 4079 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4080 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4081 } 4082 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4083 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4084 } 4085 4086 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4087 if (hci_stack->link_key_db){ 4088 reverse_bd_addr(&packet[3], addr); 4089 hci_stack->link_key_db->delete_link_key(addr); 4090 } 4091 } 4092 4093 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4094 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4095 reverse_bd_addr(&packet[3], addr); 4096 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4097 if (conn){ 4098 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4099 } 4100 } 4101 4102 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4103 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4104 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4105 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4106 reverse_bd_addr(&packet[3], addr); 4107 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4108 if (conn){ 4109 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4110 } 4111 } 4112 4113 #ifdef ENABLE_SCO_OVER_HCI 4114 // setup_synchronous_connection? Voice setting at offset 22 4115 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4116 // TODO: compare to current setting if sco connection already active 4117 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4118 } 4119 // accept_synchronus_connection? Voice setting at offset 18 4120 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4121 // TODO: compare to current setting if sco connection already active 4122 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4123 } 4124 #endif 4125 #endif 4126 4127 #ifdef ENABLE_BLE 4128 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4129 hci_stack->le_random_address_set = 1; 4130 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4131 } 4132 #ifdef ENABLE_LE_PERIPHERAL 4133 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4134 hci_stack->le_advertisements_active = packet[3]; 4135 } 4136 #endif 4137 #ifdef ENABLE_LE_CENTRAL 4138 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4139 // white list used? 4140 uint8_t initiator_filter_policy = packet[7]; 4141 switch (initiator_filter_policy){ 4142 case 0: 4143 // whitelist not used 4144 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4145 break; 4146 case 1: 4147 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4148 break; 4149 default: 4150 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4151 break; 4152 } 4153 } 4154 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4155 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4156 } 4157 #endif 4158 #endif 4159 4160 hci_stack->num_cmd_packets--; 4161 4162 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4163 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4164 } 4165 4166 // disconnect because of security block 4167 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4168 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4169 if (!connection) return; 4170 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4171 } 4172 4173 4174 // Configure Secure Simple Pairing 4175 4176 #ifdef ENABLE_CLASSIC 4177 4178 // enable will enable SSP during init 4179 void gap_ssp_set_enable(int enable){ 4180 hci_stack->ssp_enable = enable; 4181 } 4182 4183 static int hci_local_ssp_activated(void){ 4184 return gap_ssp_supported() && hci_stack->ssp_enable; 4185 } 4186 4187 // if set, BTstack will respond to io capability request using authentication requirement 4188 void gap_ssp_set_io_capability(int io_capability){ 4189 hci_stack->ssp_io_capability = io_capability; 4190 } 4191 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4192 hci_stack->ssp_authentication_requirement = authentication_requirement; 4193 } 4194 4195 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4196 void gap_ssp_set_auto_accept(int auto_accept){ 4197 hci_stack->ssp_auto_accept = auto_accept; 4198 } 4199 #endif 4200 4201 // va_list part of hci_send_cmd 4202 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4203 if (!hci_can_send_command_packet_now()){ 4204 log_error("hci_send_cmd called but cannot send packet now"); 4205 return 0; 4206 } 4207 4208 // for HCI INITIALIZATION 4209 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4210 hci_stack->last_cmd_opcode = cmd->opcode; 4211 4212 hci_reserve_packet_buffer(); 4213 uint8_t * packet = hci_stack->hci_packet_buffer; 4214 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4215 int err = hci_send_cmd_packet(packet, size); 4216 4217 // release packet buffer on error or for synchronous transport implementations 4218 if ((err < 0) || hci_transport_synchronous()){ 4219 hci_release_packet_buffer(); 4220 hci_emit_transport_packet_sent(); 4221 } 4222 4223 return err; 4224 } 4225 4226 /** 4227 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4228 */ 4229 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4230 va_list argptr; 4231 va_start(argptr, cmd); 4232 int res = hci_send_cmd_va_arg(cmd, argptr); 4233 va_end(argptr); 4234 return res; 4235 } 4236 4237 // Create various non-HCI events. 4238 // TODO: generalize, use table similar to hci_create_command 4239 4240 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4241 // dump packet 4242 if (dump) { 4243 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4244 } 4245 4246 // dispatch to all event handlers 4247 btstack_linked_list_iterator_t it; 4248 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4249 while (btstack_linked_list_iterator_has_next(&it)){ 4250 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4251 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4252 } 4253 } 4254 4255 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4256 if (!hci_stack->acl_packet_handler) return; 4257 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4258 } 4259 4260 #ifdef ENABLE_CLASSIC 4261 static void hci_notify_if_sco_can_send_now(void){ 4262 // notify SCO sender if waiting 4263 if (!hci_stack->sco_waiting_for_can_send_now) return; 4264 if (hci_can_send_sco_packet_now()){ 4265 hci_stack->sco_waiting_for_can_send_now = 0; 4266 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4267 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4268 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4269 } 4270 } 4271 4272 // parsing end emitting has been merged to reduce code size 4273 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4274 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4275 4276 uint8_t * eir_data; 4277 ad_context_t context; 4278 const uint8_t * name; 4279 uint8_t name_len; 4280 4281 if (size < 3) return; 4282 4283 int event_type = hci_event_packet_get_type(packet); 4284 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4285 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4286 4287 switch (event_type){ 4288 case HCI_EVENT_INQUIRY_RESULT: 4289 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4290 if (size != (3 + (num_responses * 14))) return; 4291 break; 4292 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4293 if (size != 257) return; 4294 if (num_responses != 1) return; 4295 break; 4296 default: 4297 return; 4298 } 4299 4300 // event[1] is set at the end 4301 int i; 4302 for (i=0; i<num_responses;i++){ 4303 memset(event, 0, sizeof(event)); 4304 event[0] = GAP_EVENT_INQUIRY_RESULT; 4305 uint8_t event_size = 18; // if name is not set by EIR 4306 4307 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4308 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4309 (void)memcpy(&event[9], 4310 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4311 3); // class of device 4312 (void)memcpy(&event[12], 4313 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4314 2); // clock offset 4315 4316 switch (event_type){ 4317 case HCI_EVENT_INQUIRY_RESULT: 4318 // 14,15,16,17 = 0, size 18 4319 break; 4320 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4321 event[14] = 1; 4322 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4323 // 16,17 = 0, size 18 4324 break; 4325 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4326 event[14] = 1; 4327 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4328 // EIR packets only contain a single inquiry response 4329 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4330 name = NULL; 4331 // Iterate over EIR data 4332 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4333 uint8_t data_type = ad_iterator_get_data_type(&context); 4334 uint8_t data_size = ad_iterator_get_data_len(&context); 4335 const uint8_t * data = ad_iterator_get_data(&context); 4336 // Prefer Complete Local Name over Shortend Local Name 4337 switch (data_type){ 4338 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4339 if (name) continue; 4340 /* fall through */ 4341 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4342 name = data; 4343 name_len = data_size; 4344 break; 4345 default: 4346 break; 4347 } 4348 } 4349 if (name){ 4350 event[16] = 1; 4351 // truncate name if needed 4352 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4353 event[17] = len; 4354 (void)memcpy(&event[18], name, len); 4355 event_size += len; 4356 } 4357 break; 4358 } 4359 event[1] = event_size - 2; 4360 hci_emit_event(event, event_size, 1); 4361 } 4362 } 4363 #endif 4364 4365 void hci_emit_state(void){ 4366 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4367 uint8_t event[3]; 4368 event[0] = BTSTACK_EVENT_STATE; 4369 event[1] = sizeof(event) - 2; 4370 event[2] = hci_stack->state; 4371 hci_emit_event(event, sizeof(event), 1); 4372 } 4373 4374 #ifdef ENABLE_CLASSIC 4375 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4376 uint8_t event[13]; 4377 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4378 event[1] = sizeof(event) - 2; 4379 event[2] = status; 4380 little_endian_store_16(event, 3, con_handle); 4381 reverse_bd_addr(address, &event[5]); 4382 event[11] = 1; // ACL connection 4383 event[12] = 0; // encryption disabled 4384 hci_emit_event(event, sizeof(event), 1); 4385 } 4386 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4387 if (disable_l2cap_timeouts) return; 4388 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4389 uint8_t event[4]; 4390 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4391 event[1] = sizeof(event) - 2; 4392 little_endian_store_16(event, 2, conn->con_handle); 4393 hci_emit_event(event, sizeof(event), 1); 4394 } 4395 #endif 4396 4397 #ifdef ENABLE_BLE 4398 #ifdef ENABLE_LE_CENTRAL 4399 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4400 uint8_t event[21]; 4401 event[0] = HCI_EVENT_LE_META; 4402 event[1] = sizeof(event) - 2; 4403 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4404 event[3] = status; 4405 little_endian_store_16(event, 4, con_handle); 4406 event[6] = 0; // TODO: role 4407 event[7] = address_type; 4408 reverse_bd_addr(address, &event[8]); 4409 little_endian_store_16(event, 14, 0); // interval 4410 little_endian_store_16(event, 16, 0); // latency 4411 little_endian_store_16(event, 18, 0); // supervision timeout 4412 event[20] = 0; // master clock accuracy 4413 hci_emit_event(event, sizeof(event), 1); 4414 } 4415 #endif 4416 #endif 4417 4418 static void hci_emit_transport_packet_sent(void){ 4419 // notify upper stack that it might be possible to send again 4420 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4421 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4422 } 4423 4424 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4425 uint8_t event[6]; 4426 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4427 event[1] = sizeof(event) - 2; 4428 event[2] = 0; // status = OK 4429 little_endian_store_16(event, 3, con_handle); 4430 event[5] = reason; 4431 hci_emit_event(event, sizeof(event), 1); 4432 } 4433 4434 static void hci_emit_nr_connections_changed(void){ 4435 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4436 uint8_t event[3]; 4437 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4438 event[1] = sizeof(event) - 2; 4439 event[2] = nr_hci_connections(); 4440 hci_emit_event(event, sizeof(event), 1); 4441 } 4442 4443 static void hci_emit_hci_open_failed(void){ 4444 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4445 uint8_t event[2]; 4446 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4447 event[1] = sizeof(event) - 2; 4448 hci_emit_event(event, sizeof(event), 1); 4449 } 4450 4451 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4452 log_info("hci_emit_dedicated_bonding_result %u ", status); 4453 uint8_t event[9]; 4454 int pos = 0; 4455 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4456 event[pos++] = sizeof(event) - 2; 4457 event[pos++] = status; 4458 reverse_bd_addr(address, &event[pos]); 4459 hci_emit_event(event, sizeof(event), 1); 4460 } 4461 4462 4463 #ifdef ENABLE_CLASSIC 4464 4465 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4466 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4467 uint8_t event[5]; 4468 int pos = 0; 4469 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4470 event[pos++] = sizeof(event) - 2; 4471 little_endian_store_16(event, 2, con_handle); 4472 pos += 2; 4473 event[pos++] = level; 4474 hci_emit_event(event, sizeof(event), 1); 4475 } 4476 4477 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4478 if (!connection) return LEVEL_0; 4479 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4480 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4481 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4482 // LEVEL 4 always requires 128 bit encrytion key size 4483 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4484 security_level = LEVEL_3; 4485 } 4486 return security_level; 4487 } 4488 4489 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4490 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4491 uint8_t event[3]; 4492 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4493 event[1] = sizeof(event) - 2; 4494 event[2] = enabled; 4495 hci_emit_event(event, sizeof(event), 1); 4496 } 4497 4498 // query if remote side supports eSCO 4499 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4500 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4501 if (!connection) return 0; 4502 return connection->remote_supported_feature_eSCO; 4503 } 4504 4505 // query if remote side supports SSP 4506 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4507 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4508 if (!connection) return 0; 4509 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4510 } 4511 4512 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4513 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4514 } 4515 4516 // GAP API 4517 /** 4518 * @bbrief enable/disable bonding. default is enabled 4519 * @praram enabled 4520 */ 4521 void gap_set_bondable_mode(int enable){ 4522 hci_stack->bondable = enable ? 1 : 0; 4523 } 4524 /** 4525 * @brief Get bondable mode. 4526 * @return 1 if bondable 4527 */ 4528 int gap_get_bondable_mode(void){ 4529 return hci_stack->bondable; 4530 } 4531 4532 /** 4533 * @brief map link keys to security levels 4534 */ 4535 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4536 switch (link_key_type){ 4537 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4538 return LEVEL_4; 4539 case COMBINATION_KEY: 4540 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4541 return LEVEL_3; 4542 default: 4543 return LEVEL_2; 4544 } 4545 } 4546 4547 /** 4548 * @brief map link keys to secure connection yes/no 4549 */ 4550 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4551 switch (link_key_type){ 4552 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4553 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4554 return 1; 4555 default: 4556 return 0; 4557 } 4558 } 4559 4560 /** 4561 * @brief map link keys to authenticated 4562 */ 4563 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4564 switch (link_key_type){ 4565 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4566 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4567 return 1; 4568 default: 4569 return 0; 4570 } 4571 } 4572 4573 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4574 log_info("gap_mitm_protection_required_for_security_level %u", level); 4575 return level > LEVEL_2; 4576 } 4577 4578 /** 4579 * @brief get current security level 4580 */ 4581 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4583 if (!connection) return LEVEL_0; 4584 return gap_security_level_for_connection(connection); 4585 } 4586 4587 /** 4588 * @brief request connection to device to 4589 * @result GAP_AUTHENTICATION_RESULT 4590 */ 4591 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4592 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4593 if (!connection){ 4594 hci_emit_security_level(con_handle, LEVEL_0); 4595 return; 4596 } 4597 gap_security_level_t current_level = gap_security_level(con_handle); 4598 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4599 requested_level, connection->requested_security_level, current_level); 4600 4601 // assumption: earlier requested security higher than current level => security request is active 4602 if (current_level < connection->requested_security_level){ 4603 if (connection->requested_security_level < requested_level){ 4604 // increase requested level as new level is higher 4605 4606 // TODO: handle re-authentication when done 4607 4608 connection->requested_security_level = requested_level; 4609 } 4610 return; 4611 } 4612 4613 // no request active, notify if security sufficient 4614 if (requested_level <= current_level){ 4615 hci_emit_security_level(con_handle, current_level); 4616 return; 4617 } 4618 4619 // start pairing to increase security level 4620 connection->requested_security_level = requested_level; 4621 4622 #if 0 4623 // sending encryption request without a link key results in an error. 4624 // TODO: figure out how to use it properly 4625 4626 // would enabling ecnryption suffice (>= LEVEL_2)? 4627 if (hci_stack->link_key_db){ 4628 link_key_type_t link_key_type; 4629 link_key_t link_key; 4630 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4631 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4632 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4633 return; 4634 } 4635 } 4636 } 4637 #endif 4638 4639 // start to authenticate connection 4640 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4641 hci_run(); 4642 } 4643 4644 /** 4645 * @brief start dedicated bonding with device. disconnect after bonding 4646 * @param device 4647 * @param request MITM protection 4648 * @result GAP_DEDICATED_BONDING_COMPLETE 4649 */ 4650 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4651 4652 // create connection state machine 4653 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4654 4655 if (!connection){ 4656 return BTSTACK_MEMORY_ALLOC_FAILED; 4657 } 4658 4659 // delete linkn key 4660 gap_drop_link_key_for_bd_addr(device); 4661 4662 // configure LEVEL_2/3, dedicated bonding 4663 connection->state = SEND_CREATE_CONNECTION; 4664 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4665 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4666 connection->bonding_flags = BONDING_DEDICATED; 4667 4668 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4669 4670 // handle: connnection failure (connection complete != ok) 4671 // handle: authentication failure 4672 // handle: disconnect on done 4673 4674 hci_run(); 4675 4676 return 0; 4677 } 4678 #endif 4679 4680 void gap_set_local_name(const char * local_name){ 4681 hci_stack->local_name = local_name; 4682 } 4683 4684 4685 #ifdef ENABLE_BLE 4686 4687 #ifdef ENABLE_LE_CENTRAL 4688 void gap_start_scan(void){ 4689 hci_stack->le_scanning_enabled = 1; 4690 hci_run(); 4691 } 4692 4693 void gap_stop_scan(void){ 4694 hci_stack->le_scanning_enabled = 0; 4695 hci_run(); 4696 } 4697 4698 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4699 hci_stack->le_scan_type = scan_type; 4700 hci_stack->le_scan_interval = scan_interval; 4701 hci_stack->le_scan_window = scan_window; 4702 hci_run(); 4703 } 4704 4705 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4706 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4707 if (!conn){ 4708 log_info("gap_connect: no connection exists yet, creating context"); 4709 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4710 if (!conn){ 4711 // notify client that alloc failed 4712 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4713 log_info("gap_connect: failed to alloc hci_connection_t"); 4714 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4715 } 4716 conn->state = SEND_CREATE_CONNECTION; 4717 log_info("gap_connect: send create connection next"); 4718 hci_run(); 4719 return ERROR_CODE_SUCCESS; 4720 } 4721 4722 if (!hci_is_le_connection(conn) || 4723 (conn->state == SEND_CREATE_CONNECTION) || 4724 (conn->state == SENT_CREATE_CONNECTION)) { 4725 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4726 log_error("gap_connect: classic connection or connect is already being created"); 4727 return GATT_CLIENT_IN_WRONG_STATE; 4728 } 4729 4730 // check if connection was just disconnected 4731 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4732 log_info("gap_connect: send create connection (again)"); 4733 conn->state = SEND_CREATE_CONNECTION; 4734 hci_run(); 4735 return ERROR_CODE_SUCCESS; 4736 } 4737 4738 log_info("gap_connect: context exists with state %u", conn->state); 4739 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4740 hci_run(); 4741 return ERROR_CODE_SUCCESS; 4742 } 4743 4744 // @assumption: only a single outgoing LE Connection exists 4745 static hci_connection_t * gap_get_outgoing_connection(void){ 4746 btstack_linked_item_t *it; 4747 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4748 hci_connection_t * conn = (hci_connection_t *) it; 4749 if (!hci_is_le_connection(conn)) continue; 4750 switch (conn->state){ 4751 case SEND_CREATE_CONNECTION: 4752 case SENT_CREATE_CONNECTION: 4753 case SENT_CANCEL_CONNECTION: 4754 return conn; 4755 default: 4756 break; 4757 }; 4758 } 4759 return NULL; 4760 } 4761 4762 uint8_t gap_connect_cancel(void){ 4763 hci_connection_t * conn = gap_get_outgoing_connection(); 4764 if (!conn) return 0; 4765 switch (conn->state){ 4766 case SEND_CREATE_CONNECTION: 4767 // skip sending create connection and emit event instead 4768 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4769 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4770 btstack_memory_hci_connection_free( conn ); 4771 break; 4772 case SENT_CREATE_CONNECTION: 4773 // request to send cancel connection 4774 conn->state = SEND_CANCEL_CONNECTION; 4775 hci_run(); 4776 break; 4777 default: 4778 break; 4779 } 4780 return 0; 4781 } 4782 #endif 4783 4784 #ifdef ENABLE_LE_CENTRAL 4785 /** 4786 * @brief Set connection parameters for outgoing connections 4787 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4788 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4789 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4790 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4791 * @param conn_latency, default: 4 4792 * @param supervision_timeout (unit: 10ms), default: 720 ms 4793 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4794 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4795 */ 4796 4797 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4798 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4799 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4800 hci_stack->le_connection_scan_interval = conn_scan_interval; 4801 hci_stack->le_connection_scan_window = conn_scan_window; 4802 hci_stack->le_connection_interval_min = conn_interval_min; 4803 hci_stack->le_connection_interval_max = conn_interval_max; 4804 hci_stack->le_connection_latency = conn_latency; 4805 hci_stack->le_supervision_timeout = supervision_timeout; 4806 hci_stack->le_minimum_ce_length = min_ce_length; 4807 hci_stack->le_maximum_ce_length = max_ce_length; 4808 } 4809 #endif 4810 4811 /** 4812 * @brief Updates the connection parameters for a given LE connection 4813 * @param handle 4814 * @param conn_interval_min (unit: 1.25ms) 4815 * @param conn_interval_max (unit: 1.25ms) 4816 * @param conn_latency 4817 * @param supervision_timeout (unit: 10ms) 4818 * @returns 0 if ok 4819 */ 4820 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4821 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4822 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4823 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4824 connection->le_conn_interval_min = conn_interval_min; 4825 connection->le_conn_interval_max = conn_interval_max; 4826 connection->le_conn_latency = conn_latency; 4827 connection->le_supervision_timeout = supervision_timeout; 4828 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4829 hci_run(); 4830 return 0; 4831 } 4832 4833 /** 4834 * @brief Request an update of the connection parameter for a given LE connection 4835 * @param handle 4836 * @param conn_interval_min (unit: 1.25ms) 4837 * @param conn_interval_max (unit: 1.25ms) 4838 * @param conn_latency 4839 * @param supervision_timeout (unit: 10ms) 4840 * @returns 0 if ok 4841 */ 4842 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4843 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4844 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4845 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4846 connection->le_conn_interval_min = conn_interval_min; 4847 connection->le_conn_interval_max = conn_interval_max; 4848 connection->le_conn_latency = conn_latency; 4849 connection->le_supervision_timeout = supervision_timeout; 4850 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4851 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4852 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4853 return 0; 4854 } 4855 4856 #ifdef ENABLE_LE_PERIPHERAL 4857 4858 static void gap_advertisments_changed(void){ 4859 // disable advertisements before updating adv, scan data, or adv params 4860 if (hci_stack->le_advertisements_active){ 4861 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4862 } 4863 hci_run(); 4864 } 4865 4866 /** 4867 * @brief Set Advertisement Data 4868 * @param advertising_data_length 4869 * @param advertising_data (max 31 octets) 4870 * @note data is not copied, pointer has to stay valid 4871 */ 4872 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4873 hci_stack->le_advertisements_data_len = advertising_data_length; 4874 hci_stack->le_advertisements_data = advertising_data; 4875 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4876 gap_advertisments_changed(); 4877 } 4878 4879 /** 4880 * @brief Set Scan Response Data 4881 * @param advertising_data_length 4882 * @param advertising_data (max 31 octets) 4883 * @note data is not copied, pointer has to stay valid 4884 */ 4885 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4886 hci_stack->le_scan_response_data_len = scan_response_data_length; 4887 hci_stack->le_scan_response_data = scan_response_data; 4888 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4889 gap_advertisments_changed(); 4890 } 4891 4892 /** 4893 * @brief Set Advertisement Parameters 4894 * @param adv_int_min 4895 * @param adv_int_max 4896 * @param adv_type 4897 * @param direct_address_type 4898 * @param direct_address 4899 * @param channel_map 4900 * @param filter_policy 4901 * 4902 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4903 */ 4904 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4905 uint8_t direct_address_typ, bd_addr_t direct_address, 4906 uint8_t channel_map, uint8_t filter_policy) { 4907 4908 hci_stack->le_advertisements_interval_min = adv_int_min; 4909 hci_stack->le_advertisements_interval_max = adv_int_max; 4910 hci_stack->le_advertisements_type = adv_type; 4911 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4912 hci_stack->le_advertisements_channel_map = channel_map; 4913 hci_stack->le_advertisements_filter_policy = filter_policy; 4914 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4915 6); 4916 4917 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4918 gap_advertisments_changed(); 4919 } 4920 4921 /** 4922 * @brief Enable/Disable Advertisements 4923 * @param enabled 4924 */ 4925 void gap_advertisements_enable(int enabled){ 4926 hci_stack->le_advertisements_enabled = enabled; 4927 if (enabled && !hci_stack->le_advertisements_active){ 4928 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4929 } 4930 if (!enabled && hci_stack->le_advertisements_active){ 4931 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4932 } 4933 hci_run(); 4934 } 4935 4936 #endif 4937 4938 void hci_le_set_own_address_type(uint8_t own_address_type){ 4939 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4940 if (own_address_type == hci_stack->le_own_addr_type) return; 4941 hci_stack->le_own_addr_type = own_address_type; 4942 4943 #ifdef ENABLE_LE_PERIPHERAL 4944 // update advertisement parameters, too 4945 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4946 gap_advertisments_changed(); 4947 #endif 4948 #ifdef ENABLE_LE_CENTRAL 4949 // note: we don't update scan parameters or modify ongoing connection attempts 4950 #endif 4951 } 4952 4953 #endif 4954 4955 uint8_t gap_disconnect(hci_con_handle_t handle){ 4956 hci_connection_t * conn = hci_connection_for_handle(handle); 4957 if (!conn){ 4958 hci_emit_disconnection_complete(handle, 0); 4959 return 0; 4960 } 4961 // ignore if already disconnected 4962 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4963 return 0; 4964 } 4965 conn->state = SEND_DISCONNECT; 4966 hci_run(); 4967 return 0; 4968 } 4969 4970 int gap_read_rssi(hci_con_handle_t con_handle){ 4971 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4972 if (hci_connection == NULL) return 0; 4973 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4974 hci_run(); 4975 return 1; 4976 } 4977 4978 /** 4979 * @brief Get connection type 4980 * @param con_handle 4981 * @result connection_type 4982 */ 4983 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4984 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4985 if (!conn) return GAP_CONNECTION_INVALID; 4986 switch (conn->address_type){ 4987 case BD_ADDR_TYPE_LE_PUBLIC: 4988 case BD_ADDR_TYPE_LE_RANDOM: 4989 return GAP_CONNECTION_LE; 4990 case BD_ADDR_TYPE_SCO: 4991 return GAP_CONNECTION_SCO; 4992 case BD_ADDR_TYPE_ACL: 4993 return GAP_CONNECTION_ACL; 4994 default: 4995 return GAP_CONNECTION_INVALID; 4996 } 4997 } 4998 4999 #ifdef ENABLE_BLE 5000 5001 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){ 5002 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5003 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5004 5005 conn->le_phy_update_all_phys = all_phys; 5006 conn->le_phy_update_tx_phys = tx_phys; 5007 conn->le_phy_update_rx_phys = rx_phys; 5008 conn->le_phy_update_phy_options = phy_options; 5009 5010 hci_run(); 5011 5012 return 0; 5013 } 5014 5015 #ifdef ENABLE_LE_CENTRAL 5016 /** 5017 * @brief Auto Connection Establishment - Start Connecting to device 5018 * @param address_typ 5019 * @param address 5020 * @returns 0 if ok 5021 */ 5022 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5023 // check capacity 5024 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5025 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5026 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5027 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5028 entry->address_type = address_type; 5029 (void)memcpy(entry->address, address, 6); 5030 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5031 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5032 hci_run(); 5033 return 0; 5034 } 5035 5036 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5037 btstack_linked_list_iterator_t it; 5038 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5039 while (btstack_linked_list_iterator_has_next(&it)){ 5040 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5041 if (entry->address_type != address_type) continue; 5042 if (memcmp(entry->address, address, 6) != 0) continue; 5043 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5044 // remove from controller if already present 5045 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5046 continue; 5047 } 5048 // direclty remove entry from whitelist 5049 btstack_linked_list_iterator_remove(&it); 5050 btstack_memory_whitelist_entry_free(entry); 5051 } 5052 } 5053 5054 /** 5055 * @brief Auto Connection Establishment - Stop Connecting to device 5056 * @param address_typ 5057 * @param address 5058 * @returns 0 if ok 5059 */ 5060 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5061 hci_remove_from_whitelist(address_type, address); 5062 hci_run(); 5063 return 0; 5064 } 5065 5066 /** 5067 * @brief Auto Connection Establishment - Stop everything 5068 * @note Convenience function to stop all active auto connection attempts 5069 */ 5070 void gap_auto_connection_stop_all(void){ 5071 btstack_linked_list_iterator_t it; 5072 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5073 while (btstack_linked_list_iterator_has_next(&it)){ 5074 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5075 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5076 // remove from controller if already present 5077 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5078 continue; 5079 } 5080 // directly remove entry from whitelist 5081 btstack_linked_list_iterator_remove(&it); 5082 btstack_memory_whitelist_entry_free(entry); 5083 } 5084 hci_run(); 5085 } 5086 5087 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5088 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5089 if (!conn) return 0; 5090 return conn->le_connection_interval; 5091 } 5092 #endif 5093 #endif 5094 5095 #ifdef ENABLE_CLASSIC 5096 /** 5097 * @brief Set Extended Inquiry Response data 5098 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5099 * @note has to be done before stack starts up 5100 */ 5101 void gap_set_extended_inquiry_response(const uint8_t * data){ 5102 hci_stack->eir_data = data; 5103 } 5104 5105 /** 5106 * @brief Start GAP Classic Inquiry 5107 * @param duration in 1.28s units 5108 * @return 0 if ok 5109 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5110 */ 5111 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5112 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5113 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5114 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5115 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5116 } 5117 hci_stack->inquiry_state = duration_in_1280ms_units; 5118 hci_run(); 5119 return 0; 5120 } 5121 5122 /** 5123 * @brief Stop GAP Classic Inquiry 5124 * @returns 0 if ok 5125 */ 5126 int gap_inquiry_stop(void){ 5127 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5128 // emit inquiry complete event, before it even started 5129 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5130 hci_emit_event(event, sizeof(event), 1); 5131 return 0; 5132 } 5133 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5134 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5135 hci_run(); 5136 return 0; 5137 } 5138 5139 5140 /** 5141 * @brief Remote Name Request 5142 * @param addr 5143 * @param page_scan_repetition_mode 5144 * @param clock_offset only used when bit 15 is set 5145 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5146 */ 5147 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5148 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5149 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5150 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5151 hci_stack->remote_name_clock_offset = clock_offset; 5152 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5153 hci_run(); 5154 return 0; 5155 } 5156 5157 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5158 hci_stack->gap_pairing_state = state; 5159 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5160 hci_run(); 5161 return 0; 5162 } 5163 5164 /** 5165 * @brief Legacy Pairing Pin Code Response 5166 * @param addr 5167 * @param pin 5168 * @return 0 if ok 5169 */ 5170 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5171 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5172 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5173 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5174 } 5175 5176 /** 5177 * @brief Abort Legacy Pairing 5178 * @param addr 5179 * @param pin 5180 * @return 0 if ok 5181 */ 5182 int gap_pin_code_negative(bd_addr_t addr){ 5183 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5184 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5185 } 5186 5187 /** 5188 * @brief SSP Passkey Response 5189 * @param addr 5190 * @param passkey 5191 * @return 0 if ok 5192 */ 5193 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5194 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5195 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5196 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5197 } 5198 5199 /** 5200 * @brief Abort SSP Passkey Entry/Pairing 5201 * @param addr 5202 * @param pin 5203 * @return 0 if ok 5204 */ 5205 int gap_ssp_passkey_negative(bd_addr_t addr){ 5206 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5207 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5208 } 5209 5210 /** 5211 * @brief Accept SSP Numeric Comparison 5212 * @param addr 5213 * @param passkey 5214 * @return 0 if ok 5215 */ 5216 int gap_ssp_confirmation_response(bd_addr_t addr){ 5217 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5218 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5219 } 5220 5221 /** 5222 * @brief Abort SSP Numeric Comparison/Pairing 5223 * @param addr 5224 * @param pin 5225 * @return 0 if ok 5226 */ 5227 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5228 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5229 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5230 } 5231 5232 /** 5233 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5234 * @param inquiry_mode see bluetooth_defines.h 5235 */ 5236 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5237 hci_stack->inquiry_mode = mode; 5238 } 5239 5240 /** 5241 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5242 */ 5243 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5244 hci_stack->sco_voice_setting = voice_setting; 5245 } 5246 5247 /** 5248 * @brief Get SCO Voice Setting 5249 * @return current voice setting 5250 */ 5251 uint16_t hci_get_sco_voice_setting(void){ 5252 return hci_stack->sco_voice_setting; 5253 } 5254 5255 static int hci_have_usb_transport(void){ 5256 if (!hci_stack->hci_transport) return 0; 5257 const char * transport_name = hci_stack->hci_transport->name; 5258 if (!transport_name) return 0; 5259 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5260 } 5261 5262 /** @brief Get SCO packet length for current SCO Voice setting 5263 * @note Using SCO packets of the exact length is required for USB transfer 5264 * @return Length of SCO packets in bytes (not audio frames) 5265 */ 5266 int hci_get_sco_packet_length(void){ 5267 int sco_packet_length = 0; 5268 5269 #ifdef ENABLE_SCO_OVER_HCI 5270 5271 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5272 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5273 5274 if (hci_have_usb_transport()){ 5275 // see Core Spec for H2 USB Transfer. 5276 // 3 byte SCO header + 24 bytes per connection 5277 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5278 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5279 } else { 5280 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5281 sco_packet_length = 3 + 60 * multiplier; 5282 // assert that it still fits inside an SCO buffer 5283 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5284 sco_packet_length = 3 + 60; 5285 } 5286 } 5287 #endif 5288 return sco_packet_length; 5289 } 5290 5291 /** 5292 * @brief Sets the master/slave policy 5293 * @param policy (0: attempt to become master, 1: let connecting device decide) 5294 */ 5295 void hci_set_master_slave_policy(uint8_t policy){ 5296 hci_stack->master_slave_policy = policy; 5297 } 5298 5299 #endif 5300 5301 HCI_STATE hci_get_state(void){ 5302 return hci_stack->state; 5303 } 5304 5305 #ifdef ENABLE_CLASSIC 5306 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5307 hci_stack->gap_classic_accept_callback = accept_callback; 5308 } 5309 #endif 5310 5311 /** 5312 * @brief Set callback for Bluetooth Hardware Error 5313 */ 5314 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5315 hci_stack->hardware_error_callback = fn; 5316 } 5317 5318 void hci_disconnect_all(void){ 5319 btstack_linked_list_iterator_t it; 5320 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5321 while (btstack_linked_list_iterator_has_next(&it)){ 5322 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5323 if (con->state == SENT_DISCONNECT) continue; 5324 con->state = SEND_DISCONNECT; 5325 } 5326 hci_run(); 5327 } 5328 5329 uint16_t hci_get_manufacturer(void){ 5330 return hci_stack->manufacturer; 5331 } 5332 5333 #ifdef ENABLE_BLE 5334 5335 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5336 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5337 if (!hci_con) return NULL; 5338 return &hci_con->sm_connection; 5339 } 5340 5341 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5342 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5343 5344 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5345 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5346 if (hci_connection == NULL) return 0; 5347 if (hci_is_le_connection(hci_connection)){ 5348 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5349 if (sm_conn->sm_connection_encrypted) { 5350 return sm_conn->sm_actual_encryption_key_size; 5351 } 5352 } 5353 #ifdef ENABLE_CLASSIC 5354 else { 5355 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5356 return hci_connection->encryption_key_size; 5357 } 5358 } 5359 #endif 5360 return 0; 5361 } 5362 5363 int gap_authenticated(hci_con_handle_t con_handle){ 5364 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5365 if (hci_connection == NULL) return 0; 5366 5367 switch (hci_connection->address_type){ 5368 case BD_ADDR_TYPE_LE_PUBLIC: 5369 case BD_ADDR_TYPE_LE_RANDOM: 5370 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5371 return hci_connection->sm_connection.sm_connection_authenticated; 5372 #ifdef ENABLE_CLASSIC 5373 case BD_ADDR_TYPE_SCO: 5374 case BD_ADDR_TYPE_ACL: 5375 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5376 #endif 5377 default: 5378 return 0; 5379 } 5380 } 5381 5382 int gap_secure_connection(hci_con_handle_t con_handle){ 5383 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5384 if (hci_connection == NULL) return 0; 5385 5386 switch (hci_connection->address_type){ 5387 case BD_ADDR_TYPE_LE_PUBLIC: 5388 case BD_ADDR_TYPE_LE_RANDOM: 5389 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5390 return hci_connection->sm_connection.sm_connection_sc; 5391 #ifdef ENABLE_CLASSIC 5392 case BD_ADDR_TYPE_SCO: 5393 case BD_ADDR_TYPE_ACL: 5394 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5395 #endif 5396 default: 5397 return 0; 5398 } 5399 } 5400 5401 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5402 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5403 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5404 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5405 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5406 return sm_conn->sm_connection_authorization_state; 5407 } 5408 #endif 5409 5410 #ifdef ENABLE_CLASSIC 5411 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){ 5412 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5413 if (!conn) return GAP_CONNECTION_INVALID; 5414 conn->sniff_min_interval = sniff_min_interval; 5415 conn->sniff_max_interval = sniff_max_interval; 5416 conn->sniff_attempt = sniff_attempt; 5417 conn->sniff_timeout = sniff_timeout; 5418 hci_run(); 5419 return 0; 5420 } 5421 5422 /** 5423 * @brief Exit Sniff mode 5424 * @param con_handle 5425 @ @return 0 if ok 5426 */ 5427 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5428 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5429 if (!conn) return GAP_CONNECTION_INVALID; 5430 conn->sniff_min_interval = 0xffff; 5431 hci_run(); 5432 return 0; 5433 } 5434 #endif 5435 5436 void hci_halting_defer(void){ 5437 if (hci_stack->state != HCI_STATE_HALTING) return; 5438 switch (hci_stack->substate){ 5439 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5440 case HCI_HALTING_CLOSE: 5441 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5442 break; 5443 default: 5444 break; 5445 } 5446 } 5447 5448 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5449 void hci_setup_test_connections_fuzz(void){ 5450 hci_connection_t * conn; 5451 5452 // default address: 66:55:44:33:00:01 5453 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5454 5455 // setup Controller info 5456 hci_stack->num_cmd_packets = 255; 5457 hci_stack->acl_packets_total_num = 255; 5458 5459 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5460 addr[5] = 0x01; 5461 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5462 conn->con_handle = addr[5]; 5463 conn->role = HCI_ROLE_SLAVE; 5464 conn->state = RECEIVED_CONNECTION_REQUEST; 5465 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5466 5467 // setup incoming Classic SCO connection with con handle 0x0002 5468 addr[5] = 0x02; 5469 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5470 conn->con_handle = addr[5]; 5471 conn->role = HCI_ROLE_SLAVE; 5472 conn->state = RECEIVED_CONNECTION_REQUEST; 5473 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5474 5475 // setup ready Classic ACL connection with con handle 0x0003 5476 addr[5] = 0x03; 5477 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5478 conn->con_handle = addr[5]; 5479 conn->role = HCI_ROLE_SLAVE; 5480 conn->state = OPEN; 5481 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5482 5483 // setup ready Classic SCO connection with con handle 0x0004 5484 addr[5] = 0x04; 5485 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5486 conn->con_handle = addr[5]; 5487 conn->role = HCI_ROLE_SLAVE; 5488 conn->state = OPEN; 5489 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5490 5491 // setup ready LE ACL connection with con handle 0x005 and public address 5492 addr[5] = 0x05; 5493 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5494 conn->con_handle = addr[5]; 5495 conn->role = HCI_ROLE_SLAVE; 5496 conn->state = OPEN; 5497 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5498 } 5499 5500 void hci_free_connections_fuzz(void){ 5501 btstack_linked_list_iterator_t it; 5502 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5503 while (btstack_linked_list_iterator_has_next(&it)){ 5504 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5505 btstack_linked_list_iterator_remove(&it); 5506 btstack_memory_hci_connection_free(con); 5507 } 5508 } 5509 void hci_simulate_working_fuzz(void){ 5510 hci_init_done(); 5511 hci_stack->num_cmd_packets = 255; 5512 } 5513 #endif 5514