1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static void hci_notify_if_sco_can_send_now(void); 137 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 138 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 139 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 140 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 141 static void hci_connection_timestamp(hci_connection_t *connection); 142 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 143 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 144 #endif 145 146 static int hci_power_control_on(void); 147 static void hci_power_control_off(void); 148 static void hci_state_reset(void); 149 static void hci_emit_transport_packet_sent(void); 150 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 151 static void hci_emit_nr_connections_changed(void); 152 static void hci_emit_hci_open_failed(void); 153 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 154 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 155 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 156 static void hci_run(void); 157 static int hci_is_le_connection(hci_connection_t * connection); 158 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 159 160 #ifdef ENABLE_CLASSIC 161 static int hci_have_usb_transport(void); 162 #endif 163 164 #ifdef ENABLE_BLE 165 #ifdef ENABLE_LE_CENTRAL 166 // called from test/ble_client/advertising_data_parser.c 167 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 168 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 169 static hci_connection_t * gap_get_outgoing_connection(void); 170 #endif 171 #endif 172 173 // the STACK is here 174 #ifndef HAVE_MALLOC 175 static hci_stack_t hci_stack_static; 176 #endif 177 static hci_stack_t * hci_stack = NULL; 178 179 #ifdef ENABLE_CLASSIC 180 // default name 181 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 182 183 // test helper 184 static uint8_t disable_l2cap_timeouts = 0; 185 #endif 186 187 /** 188 * create connection for given address 189 * 190 * @return connection OR NULL, if no memory left 191 */ 192 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 193 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 194 hci_connection_t * conn = btstack_memory_hci_connection_get(); 195 if (!conn) return NULL; 196 bd_addr_copy(conn->address, addr); 197 conn->address_type = addr_type; 198 conn->con_handle = 0xffff; 199 conn->authentication_flags = AUTH_FLAGS_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 204 btstack_run_loop_set_timer_context(&conn->timeout, conn); 205 hci_connection_timestamp(conn); 206 #endif 207 conn->acl_recombination_length = 0; 208 conn->acl_recombination_pos = 0; 209 conn->num_packets_sent = 0; 210 211 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 212 #ifdef ENABLE_BLE 213 conn->le_phy_update_all_phys = 0xff; 214 #endif 215 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 216 conn->le_max_tx_octets = 27; 217 #endif 218 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 219 return conn; 220 } 221 222 223 /** 224 * get le connection parameter range 225 * 226 * @return le connection parameter range struct 227 */ 228 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 229 *range = hci_stack->le_connection_parameter_range; 230 } 231 232 /** 233 * set le connection parameter range 234 * 235 */ 236 237 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 238 hci_stack->le_connection_parameter_range = *range; 239 } 240 241 /** 242 * @brief Test if connection parameters are inside in existing rage 243 * @param conn_interval_min (unit: 1.25ms) 244 * @param conn_interval_max (unit: 1.25ms) 245 * @param conn_latency 246 * @param supervision_timeout (unit: 10ms) 247 * @returns 1 if included 248 */ 249 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 250 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 251 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 252 253 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 254 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 255 256 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 257 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 258 259 return 1; 260 } 261 262 /** 263 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 264 * @note: default: 1 265 * @param max_peripheral_connections 266 */ 267 #ifdef ENABLE_LE_PERIPHERAL 268 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 269 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 270 } 271 #endif 272 273 /** 274 * get hci connections iterator 275 * 276 * @return hci connections iterator 277 */ 278 279 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 280 btstack_linked_list_iterator_init(it, &hci_stack->connections); 281 } 282 283 /** 284 * get connection for a given handle 285 * 286 * @return connection OR NULL, if not found 287 */ 288 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 289 btstack_linked_list_iterator_t it; 290 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 291 while (btstack_linked_list_iterator_has_next(&it)){ 292 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 293 if ( item->con_handle == con_handle ) { 294 return item; 295 } 296 } 297 return NULL; 298 } 299 300 /** 301 * get connection for given address 302 * 303 * @return connection OR NULL, if not found 304 */ 305 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 306 btstack_linked_list_iterator_t it; 307 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 308 while (btstack_linked_list_iterator_has_next(&it)){ 309 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 310 if (connection->address_type != addr_type) continue; 311 if (memcmp(addr, connection->address, 6) != 0) continue; 312 return connection; 313 } 314 return NULL; 315 } 316 317 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 318 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 319 } 320 321 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 322 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 323 } 324 325 #ifdef ENABLE_CLASSIC 326 327 #ifdef ENABLE_SCO_OVER_HCI 328 static int hci_number_sco_connections(void){ 329 int connections = 0; 330 btstack_linked_list_iterator_t it; 331 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 332 while (btstack_linked_list_iterator_has_next(&it)){ 333 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 334 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 335 connections++; 336 } 337 return connections; 338 } 339 #endif 340 341 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 342 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 343 #ifdef HAVE_EMBEDDED_TICK 344 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 345 // connections might be timed out 346 hci_emit_l2cap_check_timeout(connection); 347 } 348 #else 349 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 350 // connections might be timed out 351 hci_emit_l2cap_check_timeout(connection); 352 } 353 #endif 354 } 355 356 static void hci_connection_timestamp(hci_connection_t *connection){ 357 #ifdef HAVE_EMBEDDED_TICK 358 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 359 #else 360 connection->timestamp = btstack_run_loop_get_time_ms(); 361 #endif 362 } 363 364 /** 365 * add authentication flags and reset timer 366 * @note: assumes classic connection 367 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 368 */ 369 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 370 bd_addr_t addr; 371 reverse_bd_addr(bd_addr, addr); 372 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 373 if (conn) { 374 connectionSetAuthenticationFlags(conn, flags); 375 hci_connection_timestamp(conn); 376 } 377 } 378 379 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 380 hci_connection_t * conn = hci_connection_for_handle(handle); 381 if (!conn) return 0; 382 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 383 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 384 return 0; 385 } 386 387 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 390 hci_stack->link_key_db->delete_link_key(addr); 391 } 392 393 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 394 if (!hci_stack->link_key_db) return; 395 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 396 hci_stack->link_key_db->put_link_key(addr, link_key, type); 397 } 398 399 void gap_delete_all_link_keys(void){ 400 bd_addr_t addr; 401 link_key_t link_key; 402 link_key_type_t type; 403 btstack_link_key_iterator_t it; 404 int ok = gap_link_key_iterator_init(&it); 405 if (!ok) { 406 log_error("could not initialize iterator"); 407 return; 408 } 409 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 410 gap_drop_link_key_for_bd_addr(addr); 411 } 412 gap_link_key_iterator_done(&it); 413 } 414 415 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 416 if (!hci_stack->link_key_db) return 0; 417 if (!hci_stack->link_key_db->iterator_init) return 0; 418 return hci_stack->link_key_db->iterator_init(it); 419 } 420 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 421 if (!hci_stack->link_key_db) return 0; 422 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 423 } 424 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 425 if (!hci_stack->link_key_db) return; 426 hci_stack->link_key_db->iterator_done(it); 427 } 428 #endif 429 430 static int hci_is_le_connection(hci_connection_t * connection){ 431 switch (connection->address_type){ 432 case BD_ADDR_TYPE_LE_PUBLIC: 433 case BD_ADDR_TYPE_LE_RANDOM: 434 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 436 return 1; 437 default: 438 return 0; 439 } 440 } 441 442 /** 443 * count connections 444 */ 445 static int nr_hci_connections(void){ 446 int count = 0; 447 btstack_linked_item_t *it; 448 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 449 count++; 450 } 451 return count; 452 } 453 454 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 455 456 unsigned int num_packets_sent_classic = 0; 457 unsigned int num_packets_sent_le = 0; 458 459 btstack_linked_item_t *it; 460 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 461 hci_connection_t * connection = (hci_connection_t *) it; 462 if (hci_is_le_connection(connection)){ 463 num_packets_sent_le += connection->num_packets_sent; 464 } 465 if (connection->address_type == BD_ADDR_TYPE_ACL){ 466 num_packets_sent_classic += connection->num_packets_sent; 467 } 468 } 469 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 470 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 471 int free_slots_le = 0; 472 473 if (free_slots_classic < 0){ 474 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 475 return 0; 476 } 477 478 if (hci_stack->le_acl_packets_total_num){ 479 // if we have LE slots, they are used 480 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 481 if (free_slots_le < 0){ 482 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 483 return 0; 484 } 485 } else { 486 // otherwise, classic slots are used for LE, too 487 free_slots_classic -= num_packets_sent_le; 488 if (free_slots_classic < 0){ 489 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 490 return 0; 491 } 492 } 493 494 switch (address_type){ 495 case BD_ADDR_TYPE_UNKNOWN: 496 log_error("hci_number_free_acl_slots: unknown address type"); 497 return 0; 498 499 case BD_ADDR_TYPE_ACL: 500 return free_slots_classic; 501 502 default: 503 if (hci_stack->le_acl_packets_total_num){ 504 return free_slots_le; 505 } 506 return free_slots_classic; 507 } 508 } 509 510 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 511 // get connection type 512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 513 if (!connection){ 514 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 515 return 0; 516 } 517 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 518 } 519 520 #ifdef ENABLE_CLASSIC 521 static int hci_number_free_sco_slots(void){ 522 unsigned int num_sco_packets_sent = 0; 523 btstack_linked_item_t *it; 524 if (hci_stack->synchronous_flow_control_enabled){ 525 // explicit flow control 526 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 527 hci_connection_t * connection = (hci_connection_t *) it; 528 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 529 num_sco_packets_sent += connection->num_packets_sent; 530 } 531 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 532 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 533 return 0; 534 } 535 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 536 } else { 537 // implicit flow control -- TODO 538 int num_ready = 0; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 540 hci_connection_t * connection = (hci_connection_t *) it; 541 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 542 if (connection->sco_tx_ready == 0) continue; 543 num_ready++; 544 } 545 return num_ready; 546 } 547 } 548 #endif 549 550 // only used to send HCI Host Number Completed Packets 551 static int hci_can_send_comand_packet_transport(void){ 552 if (hci_stack->hci_packet_buffer_reserved) return 0; 553 554 // check for async hci transport implementations 555 if (hci_stack->hci_transport->can_send_packet_now){ 556 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 557 return 0; 558 } 559 } 560 return 1; 561 } 562 563 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 564 int hci_can_send_command_packet_now(void){ 565 if (hci_can_send_comand_packet_transport() == 0) return 0; 566 return hci_stack->num_cmd_packets > 0; 567 } 568 569 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 570 // check for async hci transport implementations 571 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 572 return hci_stack->hci_transport->can_send_packet_now(packet_type); 573 } 574 575 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 576 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 577 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 578 } 579 580 int hci_can_send_acl_le_packet_now(void){ 581 if (hci_stack->hci_packet_buffer_reserved) return 0; 582 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 583 } 584 585 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 586 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 587 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 588 } 589 590 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_now(con_handle); 593 } 594 595 #ifdef ENABLE_CLASSIC 596 int hci_can_send_acl_classic_packet_now(void){ 597 if (hci_stack->hci_packet_buffer_reserved) return 0; 598 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 599 } 600 601 int hci_can_send_prepared_sco_packet_now(void){ 602 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 603 if (hci_have_usb_transport()){ 604 return hci_stack->sco_can_send_now; 605 } else { 606 return hci_number_free_sco_slots() > 0; 607 } 608 } 609 610 int hci_can_send_sco_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_sco_packet_now(); 613 } 614 615 void hci_request_sco_can_send_now_event(void){ 616 hci_stack->sco_waiting_for_can_send_now = 1; 617 hci_notify_if_sco_can_send_now(); 618 } 619 #endif 620 621 // used for internal checks in l2cap.c 622 int hci_is_packet_buffer_reserved(void){ 623 return hci_stack->hci_packet_buffer_reserved; 624 } 625 626 // reserves outgoing packet buffer. @returns 1 if successful 627 int hci_reserve_packet_buffer(void){ 628 if (hci_stack->hci_packet_buffer_reserved) { 629 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 630 return 0; 631 } 632 hci_stack->hci_packet_buffer_reserved = 1; 633 return 1; 634 } 635 636 void hci_release_packet_buffer(void){ 637 hci_stack->hci_packet_buffer_reserved = 0; 638 } 639 640 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 641 static int hci_transport_synchronous(void){ 642 return hci_stack->hci_transport->can_send_packet_now == NULL; 643 } 644 645 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 646 647 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 648 649 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 650 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 651 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 652 max_acl_data_packet_length = hci_stack->le_data_packets_length; 653 } 654 655 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 656 if (hci_is_le_connection(connection)){ 657 max_acl_data_packet_length = connection->le_max_tx_octets; 658 } 659 #endif 660 661 log_debug("hci_send_acl_packet_fragments entered"); 662 663 int err; 664 // multiple packets could be send on a synchronous HCI transport 665 while (true){ 666 667 log_debug("hci_send_acl_packet_fragments loop entered"); 668 669 // get current data 670 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 671 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 672 int more_fragments = 0; 673 674 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 675 if (current_acl_data_packet_length > max_acl_data_packet_length){ 676 more_fragments = 1; 677 current_acl_data_packet_length = max_acl_data_packet_length; 678 } 679 680 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 681 if (acl_header_pos > 0){ 682 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 683 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 684 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 685 } 686 687 // update header len 688 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 689 690 // count packet 691 connection->num_packets_sent++; 692 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 693 694 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 695 if (more_fragments){ 696 // update start of next fragment to send 697 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 698 } else { 699 // done 700 hci_stack->acl_fragmentation_pos = 0; 701 hci_stack->acl_fragmentation_total_size = 0; 702 } 703 704 // send packet 705 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 706 const int size = current_acl_data_packet_length + 4; 707 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 708 hci_stack->acl_fragmentation_tx_active = 1; 709 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 710 711 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 712 713 // done yet? 714 if (!more_fragments) break; 715 716 // can send more? 717 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 718 } 719 720 log_debug("hci_send_acl_packet_fragments loop over"); 721 722 // release buffer now for synchronous transport 723 if (hci_transport_synchronous()){ 724 hci_stack->acl_fragmentation_tx_active = 0; 725 hci_release_packet_buffer(); 726 hci_emit_transport_packet_sent(); 727 } 728 729 return err; 730 } 731 732 // pre: caller has reserved the packet buffer 733 int hci_send_acl_packet_buffer(int size){ 734 735 // log_info("hci_send_acl_packet_buffer size %u", size); 736 737 if (!hci_stack->hci_packet_buffer_reserved) { 738 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 739 return 0; 740 } 741 742 uint8_t * packet = hci_stack->hci_packet_buffer; 743 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 744 745 // check for free places on Bluetooth module 746 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 747 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 748 hci_release_packet_buffer(); 749 hci_emit_transport_packet_sent(); 750 return BTSTACK_ACL_BUFFERS_FULL; 751 } 752 753 hci_connection_t *connection = hci_connection_for_handle( con_handle); 754 if (!connection) { 755 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 756 hci_release_packet_buffer(); 757 hci_emit_transport_packet_sent(); 758 return 0; 759 } 760 761 #ifdef ENABLE_CLASSIC 762 hci_connection_timestamp(connection); 763 #endif 764 765 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 766 767 // setup data 768 hci_stack->acl_fragmentation_total_size = size; 769 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 770 771 return hci_send_acl_packet_fragments(connection); 772 } 773 774 #ifdef ENABLE_CLASSIC 775 // pre: caller has reserved the packet buffer 776 int hci_send_sco_packet_buffer(int size){ 777 778 // log_info("hci_send_acl_packet_buffer size %u", size); 779 780 if (!hci_stack->hci_packet_buffer_reserved) { 781 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 782 return 0; 783 } 784 785 uint8_t * packet = hci_stack->hci_packet_buffer; 786 787 // skip checks in loopback mode 788 if (!hci_stack->loopback_mode){ 789 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 790 791 // check for free places on Bluetooth module 792 if (!hci_can_send_prepared_sco_packet_now()) { 793 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return BTSTACK_ACL_BUFFERS_FULL; 797 } 798 799 // track send packet in connection struct 800 hci_connection_t *connection = hci_connection_for_handle( con_handle); 801 if (!connection) { 802 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 803 hci_release_packet_buffer(); 804 hci_emit_transport_packet_sent(); 805 return 0; 806 } 807 808 if (hci_have_usb_transport()){ 809 // token used 810 hci_stack->sco_can_send_now = 0; 811 } else { 812 if (hci_stack->synchronous_flow_control_enabled){ 813 connection->num_packets_sent++; 814 } else { 815 connection->sco_tx_ready--; 816 } 817 } 818 } 819 820 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 821 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 822 823 if (hci_transport_synchronous()){ 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 } 827 828 return err; 829 } 830 #endif 831 832 static void acl_handler(uint8_t *packet, int size){ 833 834 // log_info("acl_handler: size %u", size); 835 836 // get info 837 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 838 hci_connection_t *conn = hci_connection_for_handle(con_handle); 839 uint8_t acl_flags = READ_ACL_FLAGS(packet); 840 uint16_t acl_length = READ_ACL_LENGTH(packet); 841 842 // ignore non-registered handle 843 if (!conn){ 844 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 845 return; 846 } 847 848 // assert packet is complete 849 if ((acl_length + 4) != size){ 850 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 851 return; 852 } 853 854 #ifdef ENABLE_CLASSIC 855 // update idle timestamp 856 hci_connection_timestamp(conn); 857 #endif 858 859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 860 hci_stack->host_completed_packets = 1; 861 conn->num_packets_completed++; 862 #endif 863 864 // handle different packet types 865 switch (acl_flags & 0x03) { 866 867 case 0x01: // continuation fragment 868 869 // sanity checks 870 if (conn->acl_recombination_pos == 0) { 871 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 872 return; 873 } 874 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 875 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 876 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 877 conn->acl_recombination_pos = 0; 878 return; 879 } 880 881 // append fragment payload (header already stored) 882 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 883 &packet[4], acl_length); 884 conn->acl_recombination_pos += acl_length; 885 886 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 887 // conn->acl_recombination_pos, conn->acl_recombination_length); 888 889 // forward complete L2CAP packet if complete. 890 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 891 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 892 // reset recombination buffer 893 conn->acl_recombination_length = 0; 894 conn->acl_recombination_pos = 0; 895 } 896 break; 897 898 case 0x02: { // first fragment 899 900 // sanity check 901 if (conn->acl_recombination_pos) { 902 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 903 conn->acl_recombination_pos = 0; 904 } 905 906 // peek into L2CAP packet! 907 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 908 909 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 910 911 // compare fragment size to L2CAP packet size 912 if (acl_length >= (l2cap_length + 4)){ 913 // forward fragment as L2CAP packet 914 hci_emit_acl_packet(packet, acl_length + 4); 915 } else { 916 917 if (acl_length > HCI_ACL_BUFFER_SIZE){ 918 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 919 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 920 return; 921 } 922 923 // store first fragment and tweak acl length for complete package 924 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 925 packet, acl_length + 4); 926 conn->acl_recombination_pos = acl_length + 4; 927 conn->acl_recombination_length = l2cap_length; 928 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 929 } 930 break; 931 932 } 933 default: 934 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 935 return; 936 } 937 938 // execute main loop 939 hci_run(); 940 } 941 942 static void hci_shutdown_connection(hci_connection_t *conn){ 943 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 int addr_type = conn->address_type; 948 #endif 949 #endif 950 951 btstack_run_loop_remove_timer(&conn->timeout); 952 953 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 954 btstack_memory_hci_connection_free( conn ); 955 956 // now it's gone 957 hci_emit_nr_connections_changed(); 958 959 #ifdef ENABLE_CLASSIC 960 #ifdef ENABLE_SCO_OVER_HCI 961 // update SCO 962 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 963 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 964 } 965 #endif 966 #endif 967 } 968 969 #ifdef ENABLE_CLASSIC 970 971 static const uint16_t packet_type_sizes[] = { 972 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 973 HCI_ACL_DH1_SIZE, 0, 0, 0, 974 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 975 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 976 }; 977 static const uint8_t packet_type_feature_requirement_bit[] = { 978 0, // 3 slot packets 979 1, // 5 slot packets 980 25, // EDR 2 mpbs 981 26, // EDR 3 mbps 982 39, // 3 slot EDR packts 983 40, // 5 slot EDR packet 984 }; 985 static const uint16_t packet_type_feature_packet_mask[] = { 986 0x0f00, // 3 slot packets 987 0xf000, // 5 slot packets 988 0x1102, // EDR 2 mpbs 989 0x2204, // EDR 3 mbps 990 0x0300, // 3 slot EDR packts 991 0x3000, // 5 slot EDR packet 992 }; 993 994 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 995 // enable packet types based on size 996 uint16_t packet_types = 0; 997 unsigned int i; 998 for (i=0;i<16;i++){ 999 if (packet_type_sizes[i] == 0) continue; 1000 if (packet_type_sizes[i] <= buffer_size){ 1001 packet_types |= 1 << i; 1002 } 1003 } 1004 // disable packet types due to missing local supported features 1005 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1006 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1007 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1008 if (feature_set) continue; 1009 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1010 packet_types &= ~packet_type_feature_packet_mask[i]; 1011 } 1012 // flip bits for "may not be used" 1013 packet_types ^= 0x3306; 1014 return packet_types; 1015 } 1016 1017 uint16_t hci_usable_acl_packet_types(void){ 1018 return hci_stack->packet_types; 1019 } 1020 #endif 1021 1022 uint8_t* hci_get_outgoing_packet_buffer(void){ 1023 // hci packet buffer is >= acl data packet length 1024 return hci_stack->hci_packet_buffer; 1025 } 1026 1027 uint16_t hci_max_acl_data_packet_length(void){ 1028 return hci_stack->acl_data_packet_length; 1029 } 1030 1031 #ifdef ENABLE_CLASSIC 1032 int hci_extended_sco_link_supported(void){ 1033 // No. 31, byte 3, bit 7 1034 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1035 } 1036 #endif 1037 1038 int hci_non_flushable_packet_boundary_flag_supported(void){ 1039 // No. 54, byte 6, bit 6 1040 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1041 } 1042 1043 static int gap_ssp_supported(void){ 1044 // No. 51, byte 6, bit 3 1045 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1046 } 1047 1048 static int hci_classic_supported(void){ 1049 #ifdef ENABLE_CLASSIC 1050 // No. 37, byte 4, bit 5, = No BR/EDR Support 1051 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 static int hci_le_supported(void){ 1058 #ifdef ENABLE_BLE 1059 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1060 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1061 #else 1062 return 0; 1063 #endif 1064 } 1065 1066 #ifdef ENABLE_BLE 1067 1068 /** 1069 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1070 */ 1071 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1072 *addr_type = hci_stack->le_own_addr_type; 1073 if (hci_stack->le_own_addr_type){ 1074 (void)memcpy(addr, hci_stack->le_random_address, 6); 1075 } else { 1076 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1077 } 1078 } 1079 1080 #ifdef ENABLE_LE_CENTRAL 1081 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1082 1083 int offset = 3; 1084 int num_reports = packet[offset]; 1085 offset += 1; 1086 1087 int i; 1088 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1089 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1090 for (i=0; (i<num_reports) && (offset < size);i++){ 1091 // sanity checks on data_length: 1092 uint8_t data_length = packet[offset + 8]; 1093 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1094 if ((offset + 9 + data_length + 1) > size) return; 1095 // setup event 1096 uint8_t event_size = 10 + data_length; 1097 int pos = 0; 1098 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1099 event[pos++] = event_size; 1100 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1101 offset += 8; 1102 pos += 8; 1103 event[pos++] = packet[offset + 1 + data_length]; // rssi 1104 event[pos++] = data_length; 1105 offset++; 1106 (void)memcpy(&event[pos], &packet[offset], data_length); 1107 pos += data_length; 1108 offset += data_length + 1; // rssi 1109 hci_emit_event(event, pos, 1); 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #ifdef ENABLE_BLE 1116 #ifdef ENABLE_LE_PERIPHERAL 1117 static void hci_reenable_advertisements_if_needed(void){ 1118 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1119 // get number of active le slave connections 1120 int num_slave_connections = 0; 1121 btstack_linked_list_iterator_t it; 1122 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1123 while (btstack_linked_list_iterator_has_next(&it)){ 1124 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1125 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1126 if (con->state != OPEN) continue; 1127 if (con->role != HCI_ROLE_SLAVE) continue; 1128 if (!hci_is_le_connection(con)) continue; 1129 num_slave_connections++; 1130 } 1131 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1132 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1133 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1134 } 1135 } 1136 } 1137 #endif 1138 #endif 1139 1140 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1141 1142 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1143 if (!hci_stack->config) return 0; 1144 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1145 // Limit baud rate for Broadcom chipsets to 3 mbps 1146 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1147 baud_rate = 3000000; 1148 } 1149 return baud_rate; 1150 } 1151 1152 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1153 UNUSED(ds); 1154 1155 switch (hci_stack->substate){ 1156 case HCI_INIT_W4_SEND_RESET: 1157 log_info("Resend HCI Reset"); 1158 hci_stack->substate = HCI_INIT_SEND_RESET; 1159 hci_stack->num_cmd_packets = 1; 1160 hci_run(); 1161 break; 1162 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1163 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1164 if (hci_stack->hci_transport->reset_link){ 1165 hci_stack->hci_transport->reset_link(); 1166 } 1167 1168 /* fall through */ 1169 1170 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1171 log_info("Resend HCI Reset - CSR Warm Boot"); 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_stack->num_cmd_packets = 1; 1174 hci_run(); 1175 break; 1176 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1177 if (hci_stack->hci_transport->set_baudrate){ 1178 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1179 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1180 hci_stack->hci_transport->set_baudrate(baud_rate); 1181 } 1182 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1183 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1184 if (hci_stack->hci_transport->reset_link){ 1185 log_info("Link Reset"); 1186 hci_stack->hci_transport->reset_link(); 1187 } 1188 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1189 hci_run(); 1190 } 1191 break; 1192 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1193 // otherwise continue 1194 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1195 hci_send_cmd(&hci_read_local_supported_commands); 1196 break; 1197 default: 1198 break; 1199 } 1200 } 1201 #endif 1202 1203 static void hci_initializing_next_state(void){ 1204 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1205 } 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3 + hci_stack->hci_packet_buffer[2]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1315 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 uint16_t bcm_delay_ms = 300; 1330 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1331 // -> Work around: wait here. 1332 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1422 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1423 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1424 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1425 // expand '00:00:00:00:00:00' in name with bd_addr 1426 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1427 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1428 break; 1429 } 1430 case HCI_INIT_WRITE_EIR_DATA: { 1431 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1432 hci_reserve_packet_buffer(); 1433 uint8_t * packet = hci_stack->hci_packet_buffer; 1434 // construct HCI Command in-place and send 1435 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1436 hci_stack->last_cmd_opcode = opcode; 1437 uint16_t offset = 0; 1438 packet[offset++] = opcode & 0xff; 1439 packet[offset++] = opcode >> 8; 1440 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1441 packet[offset++] = 0; // FEC not required 1442 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 if (hci_stack->eir_data){ 1444 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1445 ad_context_t context; 1446 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1447 uint8_t data_type = ad_iterator_get_data_type(&context); 1448 uint8_t size = ad_iterator_get_data_len(&context); 1449 const uint8_t *data = ad_iterator_get_data(&context); 1450 // copy item 1451 packet[offset++] = size + 1; 1452 packet[offset++] = data_type; 1453 memcpy(&packet[offset], data, size); 1454 // update name item 1455 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1456 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1457 } 1458 offset += size; 1459 } 1460 } else { 1461 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1462 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1463 packet[offset++] = bytes_to_copy + 1; 1464 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1465 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1466 // expand '00:00:00:00:00:00' in name with bd_addr 1467 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1468 } 1469 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 break; 1471 } 1472 case HCI_INIT_WRITE_INQUIRY_MODE: 1473 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1474 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1475 break; 1476 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1477 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1478 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1479 break; 1480 case HCI_INIT_WRITE_SCAN_ENABLE: 1481 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1482 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1483 break; 1484 // only sent if ENABLE_SCO_OVER_HCI is defined 1485 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1487 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1488 break; 1489 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1491 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1492 break; 1493 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1494 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1495 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1496 log_info("BCM: Route SCO data via HCI transport"); 1497 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1498 break; 1499 1500 #endif 1501 #ifdef ENABLE_BLE 1502 // LE INIT 1503 case HCI_INIT_LE_READ_BUFFER_SIZE: 1504 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1505 hci_send_cmd(&hci_le_read_buffer_size); 1506 break; 1507 case HCI_INIT_LE_SET_EVENT_MASK: 1508 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1509 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1510 break; 1511 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1512 // LE Supported Host = 1, Simultaneous Host = 0 1513 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1514 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1515 break; 1516 #endif 1517 1518 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1519 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1520 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1521 hci_send_cmd(&hci_le_read_maximum_data_length); 1522 break; 1523 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1524 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1525 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1526 break; 1527 #endif 1528 1529 #ifdef ENABLE_LE_CENTRAL 1530 case HCI_INIT_READ_WHITE_LIST_SIZE: 1531 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1532 hci_send_cmd(&hci_le_read_white_list_size); 1533 break; 1534 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1535 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1536 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1537 hci_send_cmd(&hci_le_set_scan_parameters, 1, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 1538 break; 1539 #endif 1540 default: 1541 return; 1542 } 1543 } 1544 1545 static void hci_init_done(void){ 1546 // done. tell the app 1547 log_info("hci_init_done -> HCI_STATE_WORKING"); 1548 hci_stack->state = HCI_STATE_WORKING; 1549 hci_emit_state(); 1550 hci_run(); 1551 } 1552 1553 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1554 bool command_completed = false; 1555 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1556 uint16_t opcode = little_endian_read_16(packet,3); 1557 if (opcode == hci_stack->last_cmd_opcode){ 1558 command_completed = true; 1559 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1560 } else { 1561 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1562 } 1563 } 1564 1565 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1566 uint8_t status = packet[2]; 1567 uint16_t opcode = little_endian_read_16(packet,4); 1568 if (opcode == hci_stack->last_cmd_opcode){ 1569 if (status){ 1570 command_completed = true; 1571 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1572 } else { 1573 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1574 } 1575 } else { 1576 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1577 } 1578 } 1579 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1580 // Vendor == CSR 1581 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1582 // TODO: track actual command 1583 command_completed = true; 1584 } 1585 1586 // Vendor == Toshiba 1587 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1588 // TODO: track actual command 1589 command_completed = true; 1590 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1591 hci_stack->num_cmd_packets = 1; 1592 } 1593 #endif 1594 1595 return command_completed; 1596 } 1597 1598 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1599 1600 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1601 1602 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1603 1604 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1605 1606 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1607 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1608 // 1609 // HCI Reset 1610 // Timeout 100 ms 1611 // HCI Reset 1612 // Command Complete Reset 1613 // HCI Read Local Version Information 1614 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1615 // hang... 1616 // 1617 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1618 if (!command_completed 1619 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1620 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1621 1622 uint16_t opcode = little_endian_read_16(packet,3); 1623 if (opcode == hci_reset.opcode){ 1624 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1625 return; 1626 } 1627 } 1628 1629 // CSR & H5 1630 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1631 if (!command_completed 1632 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1633 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1634 1635 uint16_t opcode = little_endian_read_16(packet,3); 1636 if (opcode == hci_reset.opcode){ 1637 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1638 return; 1639 } 1640 } 1641 1642 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1643 // fix: Correct substate and behave as command below 1644 if (command_completed){ 1645 switch (hci_stack->substate){ 1646 case HCI_INIT_SEND_RESET: 1647 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1648 break; 1649 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1650 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1651 break; 1652 default: 1653 break; 1654 } 1655 } 1656 1657 #endif 1658 1659 if (!command_completed) return; 1660 1661 bool need_baud_change = false; 1662 bool need_addr_change = false; 1663 1664 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1665 need_baud_change = hci_stack->config 1666 && hci_stack->chipset 1667 && hci_stack->chipset->set_baudrate_command 1668 && hci_stack->hci_transport->set_baudrate 1669 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1670 1671 need_addr_change = hci_stack->custom_bd_addr_set 1672 && hci_stack->chipset 1673 && hci_stack->chipset->set_bd_addr_command; 1674 #endif 1675 1676 switch(hci_stack->substate){ 1677 1678 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1679 case HCI_INIT_SEND_RESET: 1680 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1681 // fix: just correct substate and behave as command below 1682 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1683 btstack_run_loop_remove_timer(&hci_stack->timeout); 1684 break; 1685 case HCI_INIT_W4_SEND_RESET: 1686 btstack_run_loop_remove_timer(&hci_stack->timeout); 1687 break; 1688 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1689 log_info("Received local name, need baud change %d", (int) need_baud_change); 1690 if (need_baud_change){ 1691 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1692 return; 1693 } 1694 // skip baud change 1695 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1696 return; 1697 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1698 // for STLC2500D, baud rate change already happened. 1699 // for others, baud rate gets changed now 1700 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1701 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1702 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1703 hci_stack->hci_transport->set_baudrate(baud_rate); 1704 } 1705 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1706 return; 1707 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1708 btstack_run_loop_remove_timer(&hci_stack->timeout); 1709 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1710 return; 1711 case HCI_INIT_W4_CUSTOM_INIT: 1712 // repeat custom init 1713 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1714 return; 1715 #else 1716 case HCI_INIT_W4_SEND_RESET: 1717 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1718 return ; 1719 #endif 1720 1721 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1722 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1723 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1724 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1725 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1726 return; 1727 } 1728 if (need_addr_change){ 1729 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1730 return; 1731 } 1732 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1733 return; 1734 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1735 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1736 if (need_baud_change){ 1737 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1738 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1739 hci_stack->hci_transport->set_baudrate(baud_rate); 1740 } 1741 if (need_addr_change){ 1742 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1743 return; 1744 } 1745 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1746 return; 1747 case HCI_INIT_W4_SET_BD_ADDR: 1748 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1749 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1750 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1751 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1752 return; 1753 } 1754 // skipping st warm boot 1755 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1756 return; 1757 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1758 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1759 return; 1760 #endif 1761 case HCI_INIT_W4_READ_BD_ADDR: 1762 // only read buffer size if supported 1763 if (hci_stack->local_supported_commands[0] & 0x01) { 1764 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1765 return; 1766 } 1767 // skipping read buffer size 1768 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1769 return; 1770 case HCI_INIT_W4_SET_EVENT_MASK: 1771 // skip Classic init commands for LE only chipsets 1772 if (!hci_classic_supported()){ 1773 #ifdef ENABLE_BLE 1774 if (hci_le_supported()){ 1775 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1776 return; 1777 } 1778 #endif 1779 log_error("Neither BR/EDR nor LE supported"); 1780 hci_init_done(); 1781 return; 1782 } 1783 if (!gap_ssp_supported()){ 1784 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1785 return; 1786 } 1787 break; 1788 #ifdef ENABLE_BLE 1789 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1790 // skip write le host if not supported (e.g. on LE only EM9301) 1791 if (hci_stack->local_supported_commands[0] & 0x02) break; 1792 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1793 return; 1794 1795 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1796 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1797 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1798 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1799 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1800 return; 1801 } 1802 // explicit fall through to reduce repetitions 1803 1804 #ifdef ENABLE_LE_CENTRAL 1805 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1806 #else 1807 hci_init_done(); 1808 #endif 1809 return; 1810 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1811 1812 #endif /* ENABLE_BLE */ 1813 1814 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1815 // skip write secure connections host support if not supported or disabled 1816 if (hci_stack->secure_connections_enable && hci_stack->local_supported_commands[1] & 0x02) { 1817 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1818 return; 1819 } 1820 break; 1821 1822 #ifdef ENABLE_SCO_OVER_HCI 1823 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1824 // skip write synchronous flow control if not supported 1825 if (hci_stack->local_supported_commands[0] & 0x04) break; 1826 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1827 1828 /* fall through */ 1829 1830 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1831 // skip write default erroneous data reporting if not supported 1832 if (hci_stack->local_supported_commands[0] & 0x08) break; 1833 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1834 1835 /* fall through */ 1836 1837 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1838 // skip bcm set sco pcm config on non-Broadcom chipsets 1839 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1840 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1841 1842 /* fall through */ 1843 1844 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1845 if (!hci_le_supported()){ 1846 // SKIP LE init for Classic only configuration 1847 hci_init_done(); 1848 return; 1849 } 1850 break; 1851 1852 #else /* !ENABLE_SCO_OVER_HCI */ 1853 1854 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1855 #ifdef ENABLE_BLE 1856 if (hci_le_supported()){ 1857 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1858 return; 1859 } 1860 #endif 1861 // SKIP LE init for Classic only configuration 1862 hci_init_done(); 1863 return; 1864 #endif /* ENABLE_SCO_OVER_HCI */ 1865 1866 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1867 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1868 // Response to command before init done state -> init done 1869 case (HCI_INIT_DONE-1): 1870 hci_init_done(); 1871 return; 1872 #endif 1873 1874 default: 1875 break; 1876 } 1877 hci_initializing_next_state(); 1878 } 1879 1880 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1881 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1882 bd_addr_t bd_address; 1883 (void)memcpy(&bd_address, conn->address, 6); 1884 1885 #ifdef ENABLE_CLASSIC 1886 // cache needed data 1887 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1888 #endif 1889 1890 // connection failed, remove entry 1891 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1892 btstack_memory_hci_connection_free( conn ); 1893 1894 #ifdef ENABLE_CLASSIC 1895 // notify client if dedicated bonding 1896 if (notify_dedicated_bonding_failed){ 1897 log_info("hci notify_dedicated_bonding_failed"); 1898 hci_emit_dedicated_bonding_result(bd_address, status); 1899 } 1900 1901 // if authentication error, also delete link key 1902 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1903 gap_drop_link_key_for_bd_addr(bd_address); 1904 } 1905 #endif 1906 } 1907 1908 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1909 // handle BT initialization 1910 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1911 hci_initializing_event_handler(packet, size); 1912 } 1913 1914 // help with BT sleep 1915 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1916 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1917 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1918 hci_initializing_next_state(); 1919 } 1920 } 1921 1922 static void event_handler(uint8_t *packet, int size){ 1923 1924 uint16_t event_length = packet[1]; 1925 1926 // assert packet is complete 1927 if (size != (event_length + 2)){ 1928 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1929 return; 1930 } 1931 1932 bd_addr_t addr; 1933 bd_addr_type_t addr_type; 1934 hci_con_handle_t handle; 1935 hci_connection_t * conn; 1936 int i; 1937 int create_connection_cmd; 1938 1939 #ifdef ENABLE_CLASSIC 1940 uint8_t link_type; 1941 #endif 1942 1943 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1944 1945 switch (hci_event_packet_get_type(packet)) { 1946 1947 case HCI_EVENT_COMMAND_COMPLETE: 1948 // get num cmd packets - limit to 1 to reduce complexity 1949 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1950 1951 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1952 if (packet[5]) break; 1953 // terminate, name 248 chars 1954 packet[6+248] = 0; 1955 log_info("local name: %s", &packet[6]); 1956 } 1957 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1958 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1959 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1960 uint16_t acl_len = little_endian_read_16(packet, 6); 1961 uint16_t sco_len = packet[8]; 1962 1963 // determine usable ACL/SCO payload size 1964 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1965 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1966 1967 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1968 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1969 1970 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1971 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1972 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1973 } 1974 } 1975 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1976 if (packet[5] == 0){ 1977 uint8_t event[5]; 1978 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1979 event[1] = 3; 1980 (void)memcpy(&event[2], &packet[6], 3); 1981 hci_emit_event(event, sizeof(event), 1); 1982 } 1983 } 1984 #ifdef ENABLE_BLE 1985 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1986 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1987 hci_stack->le_acl_packets_total_num = packet[8]; 1988 // determine usable ACL payload size 1989 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1990 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1991 } 1992 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1993 } 1994 #endif 1995 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1996 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1997 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1998 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1999 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); 2000 } 2001 #endif 2002 #ifdef ENABLE_LE_CENTRAL 2003 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 2004 hci_stack->le_whitelist_capacity = packet[6]; 2005 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2006 } 2007 #endif 2008 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 2009 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2010 hci_stack->local_bd_addr); 2011 log_info("Local Address, Status: 0x%02x: Addr: %s", 2012 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2013 #ifdef ENABLE_CLASSIC 2014 if (hci_stack->link_key_db){ 2015 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2016 } 2017 #endif 2018 } 2019 #ifdef ENABLE_CLASSIC 2020 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2021 hci_emit_discoverable_enabled(hci_stack->discoverable); 2022 } 2023 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2024 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2025 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2026 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2027 hci_emit_event(event, sizeof(event), 1); 2028 } 2029 } 2030 #endif 2031 2032 // Note: HCI init checks 2033 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2034 (void)memcpy(hci_stack->local_supported_features, 2035 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2036 8); 2037 2038 #ifdef ENABLE_CLASSIC 2039 // determine usable ACL packet types based on host buffer size and supported features 2040 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2041 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2042 #endif 2043 // Classic/LE 2044 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2045 } 2046 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2047 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2048 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2049 uint16_t manufacturer = little_endian_read_16(packet, 10); 2050 // map Cypress to Broadcom 2051 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2052 log_info("Treat Cypress as Broadcom"); 2053 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2054 little_endian_store_16(packet, 10, manufacturer); 2055 } 2056 hci_stack->manufacturer = manufacturer; 2057 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2058 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2059 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2060 } 2061 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2062 hci_stack->local_supported_commands[0] = 2063 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2064 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2065 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2066 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2067 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2068 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2069 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2070 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2071 hci_stack->local_supported_commands[1] = 2072 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2073 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2074 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2075 } 2076 #ifdef ENABLE_CLASSIC 2077 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2078 if (packet[5] == 0){ 2079 hci_stack->synchronous_flow_control_enabled = 1; 2080 } 2081 } 2082 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2083 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2084 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2085 conn = hci_connection_for_handle(handle); 2086 if (!conn) break; 2087 if (status == 0){ 2088 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2089 log_info("Handle %x04x key Size: %u", handle, key_size); 2090 conn->encryption_key_size = key_size; 2091 } else { 2092 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2093 conn->encryption_key_size = 1; 2094 } 2095 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2096 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2097 } 2098 #endif 2099 break; 2100 2101 case HCI_EVENT_COMMAND_STATUS: 2102 // get num cmd packets - limit to 1 to reduce complexity 2103 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2104 2105 // check command status to detected failed outgoing connections 2106 create_connection_cmd = 0; 2107 #ifdef ENABLE_CLASSIC 2108 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2109 create_connection_cmd = 1; 2110 } 2111 #endif 2112 #ifdef ENABLE_LE_CENTRAL 2113 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2114 create_connection_cmd = 1; 2115 } 2116 #endif 2117 if (create_connection_cmd) { 2118 uint8_t status = hci_event_command_status_get_status(packet); 2119 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2120 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); 2121 2122 // reset outgoing address info 2123 memset(hci_stack->outgoing_addr, 0, 6); 2124 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2125 2126 // error => outgoing connection failed 2127 if ((conn != NULL) && (status != 0)){ 2128 hci_handle_connection_failed(conn, status); 2129 } 2130 } 2131 break; 2132 2133 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2134 if (size < 3) return; 2135 uint16_t num_handles = packet[2]; 2136 if (size != (3 + num_handles * 4)) return; 2137 uint16_t offset = 3; 2138 for (i=0; i<num_handles;i++){ 2139 handle = little_endian_read_16(packet, offset) & 0x0fff; 2140 offset += 2; 2141 uint16_t num_packets = little_endian_read_16(packet, offset); 2142 offset += 2; 2143 2144 conn = hci_connection_for_handle(handle); 2145 if (!conn){ 2146 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2147 continue; 2148 } 2149 2150 if (conn->num_packets_sent >= num_packets){ 2151 conn->num_packets_sent -= num_packets; 2152 } else { 2153 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2154 conn->num_packets_sent = 0; 2155 } 2156 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2157 2158 #ifdef ENABLE_CLASSIC 2159 // For SCO, we do the can_send_now_check here 2160 hci_notify_if_sco_can_send_now(); 2161 #endif 2162 } 2163 break; 2164 } 2165 2166 #ifdef ENABLE_CLASSIC 2167 case HCI_EVENT_INQUIRY_COMPLETE: 2168 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2169 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2170 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2171 hci_emit_event(event, sizeof(event), 1); 2172 } 2173 break; 2174 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2175 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2176 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2177 } 2178 break; 2179 case HCI_EVENT_CONNECTION_REQUEST: 2180 reverse_bd_addr(&packet[2], addr); 2181 if (hci_stack->gap_classic_accept_callback != NULL){ 2182 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2183 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2184 bd_addr_copy(hci_stack->decline_addr, addr); 2185 break; 2186 } 2187 } 2188 2189 // TODO: eval COD 8-10 2190 link_type = packet[11]; 2191 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2192 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2193 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2194 if (!conn) { 2195 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2196 } 2197 if (!conn) { 2198 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2199 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2200 bd_addr_copy(hci_stack->decline_addr, addr); 2201 break; 2202 } 2203 conn->role = HCI_ROLE_SLAVE; 2204 conn->state = RECEIVED_CONNECTION_REQUEST; 2205 // store info about eSCO 2206 if (link_type == 0x02){ 2207 conn->remote_supported_feature_eSCO = 1; 2208 } 2209 hci_run(); 2210 break; 2211 2212 case HCI_EVENT_CONNECTION_COMPLETE: 2213 // Connection management 2214 reverse_bd_addr(&packet[5], addr); 2215 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2216 addr_type = BD_ADDR_TYPE_ACL; 2217 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2218 if (conn) { 2219 if (!packet[2]){ 2220 conn->state = OPEN; 2221 conn->con_handle = little_endian_read_16(packet, 3); 2222 2223 // queue get remote feature 2224 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2225 2226 // queue set supervision timeout if we're master 2227 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2228 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2229 } 2230 2231 // restart timer 2232 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2233 btstack_run_loop_add_timer(&conn->timeout); 2234 2235 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2236 2237 hci_emit_nr_connections_changed(); 2238 } else { 2239 // connection failed 2240 hci_handle_connection_failed(conn, packet[2]); 2241 } 2242 } 2243 break; 2244 2245 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2246 reverse_bd_addr(&packet[5], addr); 2247 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2248 if (packet[2]){ 2249 // connection failed 2250 break; 2251 } 2252 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2253 if (!conn) { 2254 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2255 } 2256 if (!conn) { 2257 break; 2258 } 2259 conn->state = OPEN; 2260 conn->con_handle = little_endian_read_16(packet, 3); 2261 2262 #ifdef ENABLE_SCO_OVER_HCI 2263 // update SCO 2264 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2265 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2266 } 2267 // trigger can send now 2268 if (hci_have_usb_transport()){ 2269 hci_stack->sco_can_send_now = 1; 2270 } 2271 #endif 2272 break; 2273 2274 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2275 handle = little_endian_read_16(packet, 3); 2276 conn = hci_connection_for_handle(handle); 2277 if (!conn) break; 2278 if (!packet[2]){ 2279 uint8_t * features = &packet[5]; 2280 if (features[6] & (1 << 3)){ 2281 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2282 } 2283 if (features[3] & (1<<7)){ 2284 conn->remote_supported_feature_eSCO = 1; 2285 } 2286 } 2287 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2288 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2289 if (conn->bonding_flags & BONDING_DEDICATED){ 2290 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2291 } 2292 break; 2293 2294 case HCI_EVENT_LINK_KEY_REQUEST: 2295 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2296 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2297 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2298 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2299 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2300 hci_run(); 2301 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2302 return; 2303 2304 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2305 reverse_bd_addr(&packet[2], addr); 2306 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2307 if (!conn) break; 2308 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2309 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2310 // Change Connection Encryption keeps link key type 2311 if (link_key_type != CHANGED_COMBINATION_KEY){ 2312 conn->link_key_type = link_key_type; 2313 } 2314 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2315 // still forward event to allow dismiss of pairing dialog 2316 break; 2317 } 2318 2319 case HCI_EVENT_PIN_CODE_REQUEST: 2320 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2321 // non-bondable mode: pin code negative reply will be sent 2322 if (!hci_stack->bondable){ 2323 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2324 hci_run(); 2325 return; 2326 } 2327 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2328 if (!hci_stack->link_key_db) break; 2329 hci_event_pin_code_request_get_bd_addr(packet, addr); 2330 hci_stack->link_key_db->delete_link_key(addr); 2331 break; 2332 2333 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2334 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2335 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2336 break; 2337 2338 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2339 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2340 if (!hci_stack->ssp_auto_accept) break; 2341 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2342 break; 2343 2344 case HCI_EVENT_USER_PASSKEY_REQUEST: 2345 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2346 if (!hci_stack->ssp_auto_accept) break; 2347 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2348 break; 2349 case HCI_EVENT_MODE_CHANGE: 2350 handle = hci_event_mode_change_get_handle(packet); 2351 conn = hci_connection_for_handle(handle); 2352 if (!conn) break; 2353 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2354 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2355 break; 2356 #endif 2357 2358 case HCI_EVENT_ENCRYPTION_CHANGE: 2359 handle = little_endian_read_16(packet, 3); 2360 conn = hci_connection_for_handle(handle); 2361 if (!conn) break; 2362 if (packet[2] == 0) { 2363 if (packet[5]){ 2364 if (hci_is_le_connection(conn)){ 2365 // For LE, we accept connection as encrypted 2366 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2367 } 2368 #ifdef ENABLE_CLASSIC 2369 else { 2370 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2371 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2372 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2373 } else { 2374 // if not, pretend everything is perfect 2375 conn->encryption_key_size = 16; 2376 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2377 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2378 } 2379 } 2380 #endif 2381 } else { 2382 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2383 } 2384 } 2385 2386 break; 2387 2388 #ifdef ENABLE_CLASSIC 2389 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2390 handle = little_endian_read_16(packet, 3); 2391 conn = hci_connection_for_handle(handle); 2392 if (!conn) break; 2393 2394 // dedicated bonding: send result and disconnect 2395 if (conn->bonding_flags & BONDING_DEDICATED){ 2396 conn->bonding_flags &= ~BONDING_DEDICATED; 2397 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2398 conn->bonding_status = packet[2]; 2399 break; 2400 } 2401 2402 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2403 // link key sufficient for requested security 2404 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2405 break; 2406 } 2407 // not enough 2408 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2409 break; 2410 #endif 2411 2412 // HCI_EVENT_DISCONNECTION_COMPLETE 2413 // has been split, to first notify stack before shutting connection down 2414 // see end of function, too. 2415 case HCI_EVENT_DISCONNECTION_COMPLETE: 2416 if (packet[2]) break; // status != 0 2417 handle = little_endian_read_16(packet, 3); 2418 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2419 if (hci_stack->acl_fragmentation_total_size > 0) { 2420 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2421 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2422 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2423 hci_stack->acl_fragmentation_total_size = 0; 2424 hci_stack->acl_fragmentation_pos = 0; 2425 if (release_buffer){ 2426 hci_release_packet_buffer(); 2427 } 2428 } 2429 } 2430 2431 conn = hci_connection_for_handle(handle); 2432 if (!conn) break; 2433 // mark connection for shutdown 2434 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2435 2436 // emit dedicatd bonding event 2437 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2438 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2439 } 2440 2441 #ifdef ENABLE_BLE 2442 #ifdef ENABLE_LE_PERIPHERAL 2443 // re-enable advertisements for le connections if active 2444 if (hci_is_le_connection(conn)){ 2445 hci_reenable_advertisements_if_needed(); 2446 } 2447 #endif 2448 #endif 2449 break; 2450 2451 case HCI_EVENT_HARDWARE_ERROR: 2452 log_error("Hardware Error: 0x%02x", packet[2]); 2453 if (hci_stack->hardware_error_callback){ 2454 (*hci_stack->hardware_error_callback)(packet[2]); 2455 } else { 2456 // if no special requests, just reboot stack 2457 hci_power_control_off(); 2458 hci_power_control_on(); 2459 } 2460 break; 2461 2462 #ifdef ENABLE_CLASSIC 2463 case HCI_EVENT_ROLE_CHANGE: 2464 if (packet[2]) break; // status != 0 2465 reverse_bd_addr(&packet[3], addr); 2466 addr_type = BD_ADDR_TYPE_ACL; 2467 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2468 if (!conn) break; 2469 conn->role = packet[9]; 2470 break; 2471 #endif 2472 2473 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2474 // release packet buffer only for asynchronous transport and if there are not further fragements 2475 if (hci_transport_synchronous()) { 2476 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2477 return; // instead of break: to avoid re-entering hci_run() 2478 } 2479 hci_stack->acl_fragmentation_tx_active = 0; 2480 if (hci_stack->acl_fragmentation_total_size) break; 2481 hci_release_packet_buffer(); 2482 2483 // L2CAP receives this event via the hci_emit_event below 2484 2485 #ifdef ENABLE_CLASSIC 2486 // For SCO, we do the can_send_now_check here 2487 hci_notify_if_sco_can_send_now(); 2488 #endif 2489 break; 2490 2491 #ifdef ENABLE_CLASSIC 2492 case HCI_EVENT_SCO_CAN_SEND_NOW: 2493 // For SCO, we do the can_send_now_check here 2494 hci_stack->sco_can_send_now = 1; 2495 hci_notify_if_sco_can_send_now(); 2496 return; 2497 2498 // explode inquriy results for easier consumption 2499 case HCI_EVENT_INQUIRY_RESULT: 2500 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2501 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2502 gap_inquiry_explode(packet, size); 2503 break; 2504 #endif 2505 2506 #ifdef ENABLE_BLE 2507 case HCI_EVENT_LE_META: 2508 switch (packet[2]){ 2509 #ifdef ENABLE_LE_CENTRAL 2510 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2511 // log_info("advertising report received"); 2512 if (!hci_stack->le_scanning_enabled) break; 2513 le_handle_advertisement_report(packet, size); 2514 break; 2515 #endif 2516 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2517 // Connection management 2518 reverse_bd_addr(&packet[8], addr); 2519 addr_type = (bd_addr_type_t)packet[7]; 2520 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2521 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2522 2523 #ifdef ENABLE_LE_CENTRAL 2524 // if auto-connect, remove from whitelist in both roles 2525 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2526 hci_remove_from_whitelist(addr_type, addr); 2527 } 2528 // handle error: error is reported only to the initiator -> outgoing connection 2529 if (packet[3]){ 2530 2531 // handle cancelled outgoing connection 2532 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2533 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2534 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2535 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2536 conn = gap_get_outgoing_connection(); 2537 } 2538 2539 // outgoing connection establishment is done 2540 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2541 // remove entry 2542 if (conn){ 2543 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2544 btstack_memory_hci_connection_free( conn ); 2545 } 2546 break; 2547 } 2548 #endif 2549 // on success, both hosts receive connection complete event 2550 if (packet[6] == HCI_ROLE_MASTER){ 2551 #ifdef ENABLE_LE_CENTRAL 2552 // if we're master, it was an outgoing connection and we're done with it 2553 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2554 #endif 2555 } else { 2556 #ifdef ENABLE_LE_PERIPHERAL 2557 // if we're slave, it was an incoming connection, advertisements have stopped 2558 hci_stack->le_advertisements_active = 0; 2559 #endif 2560 } 2561 // LE connections are auto-accepted, so just create a connection if there isn't one already 2562 if (!conn){ 2563 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2564 } 2565 // no memory, sorry. 2566 if (!conn){ 2567 break; 2568 } 2569 2570 conn->state = OPEN; 2571 conn->role = packet[6]; 2572 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2573 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2574 2575 #ifdef ENABLE_LE_PERIPHERAL 2576 if (packet[6] == HCI_ROLE_SLAVE){ 2577 hci_reenable_advertisements_if_needed(); 2578 } 2579 #endif 2580 2581 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2582 2583 // restart timer 2584 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2585 // btstack_run_loop_add_timer(&conn->timeout); 2586 2587 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2588 2589 hci_emit_nr_connections_changed(); 2590 break; 2591 2592 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2593 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2594 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2595 conn = hci_connection_for_handle(handle); 2596 if (!conn) break; 2597 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2598 break; 2599 2600 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2601 // connection 2602 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2603 conn = hci_connection_for_handle(handle); 2604 if (conn) { 2605 // read arguments 2606 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2607 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2608 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2609 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2610 2611 // validate against current connection parameter range 2612 le_connection_parameter_range_t existing_range; 2613 gap_get_connection_parameter_range(&existing_range); 2614 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2615 if (update_parameter){ 2616 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2617 conn->le_conn_interval_min = le_conn_interval_min; 2618 conn->le_conn_interval_max = le_conn_interval_max; 2619 conn->le_conn_latency = le_conn_latency; 2620 conn->le_supervision_timeout = le_supervision_timeout; 2621 } else { 2622 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2623 } 2624 } 2625 break; 2626 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2627 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2628 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2629 conn = hci_connection_for_handle(handle); 2630 if (conn) { 2631 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2632 } 2633 break; 2634 #endif 2635 default: 2636 break; 2637 } 2638 break; 2639 #endif 2640 case HCI_EVENT_VENDOR_SPECIFIC: 2641 // Vendor specific commands often create vendor specific event instead of num completed packets 2642 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2643 switch (hci_stack->manufacturer){ 2644 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2645 hci_stack->num_cmd_packets = 1; 2646 break; 2647 default: 2648 break; 2649 } 2650 break; 2651 default: 2652 break; 2653 } 2654 2655 handle_event_for_current_stack_state(packet, size); 2656 2657 // notify upper stack 2658 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2659 2660 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2661 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2662 if (!packet[2]){ 2663 handle = little_endian_read_16(packet, 3); 2664 hci_connection_t * aConn = hci_connection_for_handle(handle); 2665 if (aConn) { 2666 // discard connection if app did not trigger a reconnect in the event handler 2667 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2668 hci_shutdown_connection(aConn); 2669 } 2670 } 2671 } 2672 } 2673 2674 // execute main loop 2675 hci_run(); 2676 } 2677 2678 #ifdef ENABLE_CLASSIC 2679 2680 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2681 static void sco_schedule_tx(hci_connection_t * conn); 2682 2683 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2684 log_debug("SCO TX Timeout"); 2685 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2686 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2687 if (!conn) return; 2688 2689 // trigger send 2690 conn->sco_tx_ready = 1; 2691 // extra packet if CVSD but SCO buffer is too short 2692 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2693 conn->sco_tx_ready++; 2694 } 2695 hci_notify_if_sco_can_send_now(); 2696 } 2697 2698 2699 #define SCO_TX_AFTER_RX_MS (6) 2700 2701 static void sco_schedule_tx(hci_connection_t * conn){ 2702 2703 uint32_t now = btstack_run_loop_get_time_ms(); 2704 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2705 int time_delta_ms = sco_tx_ms - now; 2706 2707 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2708 2709 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2710 btstack_run_loop_set_timer(timer, time_delta_ms); 2711 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2712 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2713 btstack_run_loop_add_timer(timer); 2714 } 2715 2716 static void sco_handler(uint8_t * packet, uint16_t size){ 2717 // lookup connection struct 2718 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2719 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2720 if (!conn) return; 2721 2722 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2723 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2724 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2725 packet[2] = 0x3c; 2726 memmove(&packet[3], &packet[23], 63); 2727 size = 63; 2728 } 2729 } 2730 2731 if (hci_have_usb_transport()){ 2732 // Nothing to do 2733 } else { 2734 // 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); 2735 if (hci_stack->synchronous_flow_control_enabled == 0){ 2736 uint32_t now = btstack_run_loop_get_time_ms(); 2737 2738 if (!conn->sco_rx_valid){ 2739 // ignore first 10 packets 2740 conn->sco_rx_count++; 2741 // log_debug("sco rx count %u", conn->sco_rx_count); 2742 if (conn->sco_rx_count == 10) { 2743 // use first timestamp as is and pretent it just started 2744 conn->sco_rx_ms = now; 2745 conn->sco_rx_valid = 1; 2746 conn->sco_rx_count = 0; 2747 sco_schedule_tx(conn); 2748 } 2749 } else { 2750 // track expected arrival timme 2751 conn->sco_rx_count++; 2752 conn->sco_rx_ms += 7; 2753 int delta = (int32_t) (now - conn->sco_rx_ms); 2754 if (delta > 0){ 2755 conn->sco_rx_ms++; 2756 } 2757 // log_debug("sco rx %u", conn->sco_rx_ms); 2758 sco_schedule_tx(conn); 2759 } 2760 } 2761 } 2762 // deliver to app 2763 if (hci_stack->sco_packet_handler) { 2764 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2765 } 2766 2767 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2768 conn->num_packets_completed++; 2769 hci_stack->host_completed_packets = 1; 2770 hci_run(); 2771 #endif 2772 } 2773 #endif 2774 2775 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2776 hci_dump_packet(packet_type, 1, packet, size); 2777 switch (packet_type) { 2778 case HCI_EVENT_PACKET: 2779 event_handler(packet, size); 2780 break; 2781 case HCI_ACL_DATA_PACKET: 2782 acl_handler(packet, size); 2783 break; 2784 #ifdef ENABLE_CLASSIC 2785 case HCI_SCO_DATA_PACKET: 2786 sco_handler(packet, size); 2787 break; 2788 #endif 2789 default: 2790 break; 2791 } 2792 } 2793 2794 /** 2795 * @brief Add event packet handler. 2796 */ 2797 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2798 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2799 } 2800 2801 2802 /** Register HCI packet handlers */ 2803 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2804 hci_stack->acl_packet_handler = handler; 2805 } 2806 2807 #ifdef ENABLE_CLASSIC 2808 /** 2809 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2810 */ 2811 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2812 hci_stack->sco_packet_handler = handler; 2813 } 2814 #endif 2815 2816 static void hci_state_reset(void){ 2817 // no connections yet 2818 hci_stack->connections = NULL; 2819 2820 // keep discoverable/connectable as this has been requested by the client(s) 2821 // hci_stack->discoverable = 0; 2822 // hci_stack->connectable = 0; 2823 // hci_stack->bondable = 1; 2824 // hci_stack->own_addr_type = 0; 2825 2826 // buffer is free 2827 hci_stack->hci_packet_buffer_reserved = 0; 2828 2829 // no pending cmds 2830 hci_stack->decline_reason = 0; 2831 hci_stack->new_scan_enable_value = 0xff; 2832 2833 // LE 2834 #ifdef ENABLE_BLE 2835 memset(hci_stack->le_random_address, 0, 6); 2836 hci_stack->le_random_address_set = 0; 2837 #endif 2838 #ifdef ENABLE_LE_CENTRAL 2839 hci_stack->le_scanning_active = 0; 2840 hci_stack->le_scan_type = 0xff; 2841 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2842 hci_stack->le_whitelist = 0; 2843 hci_stack->le_whitelist_capacity = 0; 2844 #endif 2845 } 2846 2847 #ifdef ENABLE_CLASSIC 2848 /** 2849 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2850 */ 2851 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2852 // store and open remote device db 2853 hci_stack->link_key_db = link_key_db; 2854 if (hci_stack->link_key_db) { 2855 hci_stack->link_key_db->open(); 2856 } 2857 } 2858 #endif 2859 2860 void hci_init(const hci_transport_t *transport, const void *config){ 2861 2862 #ifdef HAVE_MALLOC 2863 if (!hci_stack) { 2864 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2865 } 2866 #else 2867 hci_stack = &hci_stack_static; 2868 #endif 2869 memset(hci_stack, 0, sizeof(hci_stack_t)); 2870 2871 // reference to use transport layer implementation 2872 hci_stack->hci_transport = transport; 2873 2874 // reference to used config 2875 hci_stack->config = config; 2876 2877 // setup pointer for outgoing packet buffer 2878 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2879 2880 // max acl payload size defined in config.h 2881 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2882 2883 // register packet handlers with transport 2884 transport->register_packet_handler(&packet_handler); 2885 2886 hci_stack->state = HCI_STATE_OFF; 2887 2888 // class of device 2889 hci_stack->class_of_device = 0x007a020c; // Smartphone 2890 2891 // bondable by default 2892 hci_stack->bondable = 1; 2893 2894 #ifdef ENABLE_CLASSIC 2895 // classic name 2896 hci_stack->local_name = default_classic_name; 2897 2898 // Master slave policy 2899 hci_stack->master_slave_policy = 1; 2900 2901 // Allow Role Switch 2902 hci_stack->allow_role_switch = 1; 2903 2904 // Default / minimum security level = 2 2905 hci_stack->gap_security_level = LEVEL_2; 2906 2907 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2908 hci_stack->gap_required_encyrption_key_size = 16; 2909 #endif 2910 2911 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2912 hci_stack->ssp_enable = 1; 2913 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2914 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2915 hci_stack->ssp_auto_accept = 1; 2916 2917 // Secure Connections: enable (requires support from Controller) 2918 hci_stack->secure_connections_enable = true; 2919 2920 // voice setting - signed 16 bit pcm data with CVSD over the air 2921 hci_stack->sco_voice_setting = 0x60; 2922 2923 #ifdef ENABLE_LE_CENTRAL 2924 // connection parameter to use for outgoing connections 2925 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2926 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2927 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2928 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2929 hci_stack->le_connection_latency = 4; // 4 2930 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2931 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2932 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2933 2934 // default LE Scanning 2935 hci_stack->le_scan_interval = 0x1e0; 2936 hci_stack->le_scan_window = 0x30; 2937 #endif 2938 2939 #ifdef ENABLE_LE_PERIPHERAL 2940 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2941 #endif 2942 2943 // connection parameter range used to answer connection parameter update requests in l2cap 2944 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2945 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2946 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2947 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2948 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2949 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2950 2951 hci_state_reset(); 2952 } 2953 2954 /** 2955 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2956 */ 2957 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2958 hci_stack->chipset = chipset_driver; 2959 2960 // reset chipset driver - init is also called on power_up 2961 if (hci_stack->chipset && hci_stack->chipset->init){ 2962 hci_stack->chipset->init(hci_stack->config); 2963 } 2964 } 2965 2966 /** 2967 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2968 */ 2969 void hci_set_control(const btstack_control_t *hardware_control){ 2970 // references to used control implementation 2971 hci_stack->control = hardware_control; 2972 // init with transport config 2973 hardware_control->init(hci_stack->config); 2974 } 2975 2976 void hci_close(void){ 2977 // close remote device db 2978 if (hci_stack->link_key_db) { 2979 hci_stack->link_key_db->close(); 2980 } 2981 2982 btstack_linked_list_iterator_t lit; 2983 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2984 while (btstack_linked_list_iterator_has_next(&lit)){ 2985 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2986 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2987 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2988 hci_shutdown_connection(connection); 2989 } 2990 2991 hci_power_control(HCI_POWER_OFF); 2992 2993 #ifdef HAVE_MALLOC 2994 free(hci_stack); 2995 #endif 2996 hci_stack = NULL; 2997 } 2998 2999 #ifdef ENABLE_CLASSIC 3000 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3001 // validate ranage and set 3002 if (encryption_key_size < 7) return; 3003 if (encryption_key_size > 16) return; 3004 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3005 } 3006 3007 void gap_set_security_level(gap_security_level_t security_level){ 3008 hci_stack->gap_security_level = security_level; 3009 } 3010 3011 gap_security_level_t gap_get_security_level(void){ 3012 return hci_stack->gap_security_level; 3013 } 3014 #endif 3015 3016 #ifdef ENABLE_CLASSIC 3017 void gap_set_class_of_device(uint32_t class_of_device){ 3018 hci_stack->class_of_device = class_of_device; 3019 } 3020 3021 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3022 hci_stack->default_link_policy_settings = default_link_policy_settings; 3023 } 3024 3025 void gap_set_allow_role_switch(bool allow_role_switch){ 3026 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3027 } 3028 3029 uint8_t hci_get_allow_role_switch(void){ 3030 return hci_stack->allow_role_switch; 3031 } 3032 3033 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3034 hci_stack->link_supervision_timeout = link_supervision_timeout; 3035 } 3036 3037 void hci_disable_l2cap_timeout_check(void){ 3038 disable_l2cap_timeouts = 1; 3039 } 3040 #endif 3041 3042 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3043 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3044 void hci_set_bd_addr(bd_addr_t addr){ 3045 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3046 hci_stack->custom_bd_addr_set = 1; 3047 } 3048 #endif 3049 3050 // State-Module-Driver overview 3051 // state module low-level 3052 // HCI_STATE_OFF off close 3053 // HCI_STATE_INITIALIZING, on open 3054 // HCI_STATE_WORKING, on open 3055 // HCI_STATE_HALTING, on open 3056 // HCI_STATE_SLEEPING, off/sleep close 3057 // HCI_STATE_FALLING_ASLEEP on open 3058 3059 static int hci_power_control_on(void){ 3060 3061 // power on 3062 int err = 0; 3063 if (hci_stack->control && hci_stack->control->on){ 3064 err = (*hci_stack->control->on)(); 3065 } 3066 if (err){ 3067 log_error( "POWER_ON failed"); 3068 hci_emit_hci_open_failed(); 3069 return err; 3070 } 3071 3072 // int chipset driver 3073 if (hci_stack->chipset && hci_stack->chipset->init){ 3074 hci_stack->chipset->init(hci_stack->config); 3075 } 3076 3077 // init transport 3078 if (hci_stack->hci_transport->init){ 3079 hci_stack->hci_transport->init(hci_stack->config); 3080 } 3081 3082 // open transport 3083 err = hci_stack->hci_transport->open(); 3084 if (err){ 3085 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3086 if (hci_stack->control && hci_stack->control->off){ 3087 (*hci_stack->control->off)(); 3088 } 3089 hci_emit_hci_open_failed(); 3090 return err; 3091 } 3092 return 0; 3093 } 3094 3095 static void hci_power_control_off(void){ 3096 3097 log_info("hci_power_control_off"); 3098 3099 // close low-level device 3100 hci_stack->hci_transport->close(); 3101 3102 log_info("hci_power_control_off - hci_transport closed"); 3103 3104 // power off 3105 if (hci_stack->control && hci_stack->control->off){ 3106 (*hci_stack->control->off)(); 3107 } 3108 3109 log_info("hci_power_control_off - control closed"); 3110 3111 hci_stack->state = HCI_STATE_OFF; 3112 } 3113 3114 static void hci_power_control_sleep(void){ 3115 3116 log_info("hci_power_control_sleep"); 3117 3118 #if 0 3119 // don't close serial port during sleep 3120 3121 // close low-level device 3122 hci_stack->hci_transport->close(hci_stack->config); 3123 #endif 3124 3125 // sleep mode 3126 if (hci_stack->control && hci_stack->control->sleep){ 3127 (*hci_stack->control->sleep)(); 3128 } 3129 3130 hci_stack->state = HCI_STATE_SLEEPING; 3131 } 3132 3133 static int hci_power_control_wake(void){ 3134 3135 log_info("hci_power_control_wake"); 3136 3137 // wake on 3138 if (hci_stack->control && hci_stack->control->wake){ 3139 (*hci_stack->control->wake)(); 3140 } 3141 3142 #if 0 3143 // open low-level device 3144 int err = hci_stack->hci_transport->open(hci_stack->config); 3145 if (err){ 3146 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3147 if (hci_stack->control && hci_stack->control->off){ 3148 (*hci_stack->control->off)(); 3149 } 3150 hci_emit_hci_open_failed(); 3151 return err; 3152 } 3153 #endif 3154 3155 return 0; 3156 } 3157 3158 static void hci_power_transition_to_initializing(void){ 3159 // set up state machine 3160 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3161 hci_stack->hci_packet_buffer_reserved = 0; 3162 hci_stack->state = HCI_STATE_INITIALIZING; 3163 hci_stack->substate = HCI_INIT_SEND_RESET; 3164 } 3165 3166 int hci_power_control(HCI_POWER_MODE power_mode){ 3167 3168 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3169 3170 int err = 0; 3171 switch (hci_stack->state){ 3172 3173 case HCI_STATE_OFF: 3174 switch (power_mode){ 3175 case HCI_POWER_ON: 3176 err = hci_power_control_on(); 3177 if (err) { 3178 log_error("hci_power_control_on() error %d", err); 3179 return err; 3180 } 3181 hci_power_transition_to_initializing(); 3182 break; 3183 case HCI_POWER_OFF: 3184 // do nothing 3185 break; 3186 case HCI_POWER_SLEEP: 3187 // do nothing (with SLEEP == OFF) 3188 break; 3189 } 3190 break; 3191 3192 case HCI_STATE_INITIALIZING: 3193 switch (power_mode){ 3194 case HCI_POWER_ON: 3195 // do nothing 3196 break; 3197 case HCI_POWER_OFF: 3198 // no connections yet, just turn it off 3199 hci_power_control_off(); 3200 break; 3201 case HCI_POWER_SLEEP: 3202 // no connections yet, just turn it off 3203 hci_power_control_sleep(); 3204 break; 3205 } 3206 break; 3207 3208 case HCI_STATE_WORKING: 3209 switch (power_mode){ 3210 case HCI_POWER_ON: 3211 // do nothing 3212 break; 3213 case HCI_POWER_OFF: 3214 // see hci_run 3215 hci_stack->state = HCI_STATE_HALTING; 3216 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 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_HALTING: 3227 switch (power_mode){ 3228 case HCI_POWER_ON: 3229 hci_power_transition_to_initializing(); 3230 break; 3231 case HCI_POWER_OFF: 3232 // do nothing 3233 break; 3234 case HCI_POWER_SLEEP: 3235 // see hci_run 3236 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3237 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3238 break; 3239 } 3240 break; 3241 3242 case HCI_STATE_FALLING_ASLEEP: 3243 switch (power_mode){ 3244 case HCI_POWER_ON: 3245 3246 #ifdef HAVE_PLATFORM_IPHONE_OS 3247 // nothing to do, if H4 supports power management 3248 if (btstack_control_iphone_power_management_enabled()){ 3249 hci_stack->state = HCI_STATE_INITIALIZING; 3250 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3251 break; 3252 } 3253 #endif 3254 hci_power_transition_to_initializing(); 3255 break; 3256 case HCI_POWER_OFF: 3257 // see hci_run 3258 hci_stack->state = HCI_STATE_HALTING; 3259 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3260 break; 3261 case HCI_POWER_SLEEP: 3262 // do nothing 3263 break; 3264 } 3265 break; 3266 3267 case HCI_STATE_SLEEPING: 3268 switch (power_mode){ 3269 case HCI_POWER_ON: 3270 3271 #ifdef HAVE_PLATFORM_IPHONE_OS 3272 // nothing to do, if H4 supports power management 3273 if (btstack_control_iphone_power_management_enabled()){ 3274 hci_stack->state = HCI_STATE_INITIALIZING; 3275 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3276 hci_update_scan_enable(); 3277 break; 3278 } 3279 #endif 3280 err = hci_power_control_wake(); 3281 if (err) return err; 3282 hci_power_transition_to_initializing(); 3283 break; 3284 case HCI_POWER_OFF: 3285 hci_stack->state = HCI_STATE_HALTING; 3286 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3287 break; 3288 case HCI_POWER_SLEEP: 3289 // do nothing 3290 break; 3291 } 3292 break; 3293 } 3294 3295 // create internal event 3296 hci_emit_state(); 3297 3298 // trigger next/first action 3299 hci_run(); 3300 3301 return 0; 3302 } 3303 3304 3305 #ifdef ENABLE_CLASSIC 3306 3307 static void hci_update_scan_enable(void){ 3308 // 2 = page scan, 1 = inq scan 3309 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3310 hci_run(); 3311 } 3312 3313 void gap_discoverable_control(uint8_t enable){ 3314 if (enable) enable = 1; // normalize argument 3315 3316 if (hci_stack->discoverable == enable){ 3317 hci_emit_discoverable_enabled(hci_stack->discoverable); 3318 return; 3319 } 3320 3321 hci_stack->discoverable = enable; 3322 hci_update_scan_enable(); 3323 } 3324 3325 void gap_connectable_control(uint8_t enable){ 3326 if (enable) enable = 1; // normalize argument 3327 3328 // don't emit event 3329 if (hci_stack->connectable == enable) return; 3330 3331 hci_stack->connectable = enable; 3332 hci_update_scan_enable(); 3333 } 3334 #endif 3335 3336 void gap_local_bd_addr(bd_addr_t address_buffer){ 3337 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3338 } 3339 3340 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3341 static void hci_host_num_completed_packets(void){ 3342 3343 // create packet manually as arrays are not supported and num_commands should not get reduced 3344 hci_reserve_packet_buffer(); 3345 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3346 3347 uint16_t size = 0; 3348 uint16_t num_handles = 0; 3349 packet[size++] = 0x35; 3350 packet[size++] = 0x0c; 3351 size++; // skip param len 3352 size++; // skip num handles 3353 3354 // add { handle, packets } entries 3355 btstack_linked_item_t * it; 3356 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3357 hci_connection_t * connection = (hci_connection_t *) it; 3358 if (connection->num_packets_completed){ 3359 little_endian_store_16(packet, size, connection->con_handle); 3360 size += 2; 3361 little_endian_store_16(packet, size, connection->num_packets_completed); 3362 size += 2; 3363 // 3364 num_handles++; 3365 connection->num_packets_completed = 0; 3366 } 3367 } 3368 3369 packet[2] = size - 3; 3370 packet[3] = num_handles; 3371 3372 hci_stack->host_completed_packets = 0; 3373 3374 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3375 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3376 3377 // release packet buffer for synchronous transport implementations 3378 if (hci_transport_synchronous()){ 3379 hci_release_packet_buffer(); 3380 hci_emit_transport_packet_sent(); 3381 } 3382 } 3383 #endif 3384 3385 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3386 UNUSED(ds); 3387 hci_stack->substate = HCI_HALTING_CLOSE; 3388 // allow packet handlers to defer final shutdown 3389 hci_emit_state(); 3390 hci_run(); 3391 } 3392 3393 static bool hci_run_acl_fragments(void){ 3394 if (hci_stack->acl_fragmentation_total_size > 0) { 3395 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3396 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3397 if (connection) { 3398 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3399 hci_send_acl_packet_fragments(connection); 3400 return true; 3401 } 3402 } else { 3403 // connection gone -> discard further fragments 3404 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3405 hci_stack->acl_fragmentation_total_size = 0; 3406 hci_stack->acl_fragmentation_pos = 0; 3407 } 3408 } 3409 return false; 3410 } 3411 3412 #ifdef ENABLE_CLASSIC 3413 static bool hci_run_general_gap_classic(void){ 3414 3415 // decline incoming connections 3416 if (hci_stack->decline_reason){ 3417 uint8_t reason = hci_stack->decline_reason; 3418 hci_stack->decline_reason = 0; 3419 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3420 return true; 3421 } 3422 // send scan enable 3423 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3424 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3425 hci_stack->new_scan_enable_value = 0xff; 3426 return true; 3427 } 3428 // start/stop inquiry 3429 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3430 uint8_t duration = hci_stack->inquiry_state; 3431 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3432 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3433 return true; 3434 } 3435 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3436 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3437 hci_send_cmd(&hci_inquiry_cancel); 3438 return true; 3439 } 3440 // remote name request 3441 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3442 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3443 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3444 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3445 return true; 3446 } 3447 // pairing 3448 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3449 uint8_t state = hci_stack->gap_pairing_state; 3450 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3451 switch (state){ 3452 case GAP_PAIRING_STATE_SEND_PIN: 3453 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); 3454 break; 3455 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3456 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3457 break; 3458 case GAP_PAIRING_STATE_SEND_PASSKEY: 3459 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3460 break; 3461 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3462 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3463 break; 3464 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3465 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3466 break; 3467 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3468 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3469 break; 3470 default: 3471 break; 3472 } 3473 return true; 3474 } 3475 return false; 3476 } 3477 #endif 3478 3479 #ifdef ENABLE_BLE 3480 static bool hci_run_general_gap_le(void){ 3481 3482 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3483 3484 if (hci_stack->state != HCI_STATE_WORKING) return false; 3485 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3486 3487 #ifdef ENABLE_LE_CENTRAL 3488 // parameter change requires scanning to be stopped first 3489 if (hci_stack->le_scan_type != 0xff) { 3490 if (hci_stack->le_scanning_active){ 3491 hci_stack->le_scanning_active = 0; 3492 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3493 } else { 3494 int scan_type = (int) hci_stack->le_scan_type; 3495 hci_stack->le_scan_type = 0xff; 3496 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); 3497 } 3498 return true; 3499 } 3500 // finally, we can enable/disable le scan 3501 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3502 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3503 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3504 return true; 3505 } 3506 #endif 3507 #ifdef ENABLE_LE_PERIPHERAL 3508 // le advertisement control 3509 if (hci_stack->le_advertisements_todo){ 3510 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3511 } 3512 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3513 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3514 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3515 return true; 3516 } 3517 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3518 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3519 hci_send_cmd(&hci_le_set_advertising_parameters, 3520 hci_stack->le_advertisements_interval_min, 3521 hci_stack->le_advertisements_interval_max, 3522 hci_stack->le_advertisements_type, 3523 hci_stack->le_own_addr_type, 3524 hci_stack->le_advertisements_direct_address_type, 3525 hci_stack->le_advertisements_direct_address, 3526 hci_stack->le_advertisements_channel_map, 3527 hci_stack->le_advertisements_filter_policy); 3528 return true; 3529 } 3530 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3531 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3532 uint8_t adv_data_clean[31]; 3533 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3534 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3535 hci_stack->le_advertisements_data_len); 3536 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3537 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3538 return true; 3539 } 3540 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3541 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3542 uint8_t scan_data_clean[31]; 3543 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3544 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3545 hci_stack->le_scan_response_data_len); 3546 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3547 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3548 return true; 3549 } 3550 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3551 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3552 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3553 return true; 3554 } 3555 #endif 3556 3557 #ifdef ENABLE_LE_CENTRAL 3558 // 3559 // LE Whitelist Management 3560 // 3561 3562 // check if whitelist needs modification 3563 btstack_linked_list_iterator_t lit; 3564 int modification_pending = 0; 3565 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3566 while (btstack_linked_list_iterator_has_next(&lit)){ 3567 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3568 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3569 modification_pending = 1; 3570 break; 3571 } 3572 } 3573 3574 if (modification_pending){ 3575 // stop connnecting if modification pending 3576 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3577 hci_send_cmd(&hci_le_create_connection_cancel); 3578 return true; 3579 } 3580 3581 // add/remove entries 3582 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3583 while (btstack_linked_list_iterator_has_next(&lit)){ 3584 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3585 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3586 entry->state = LE_WHITELIST_ON_CONTROLLER; 3587 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3588 return true; 3589 } 3590 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3591 bd_addr_t address; 3592 bd_addr_type_t address_type = entry->address_type; 3593 (void)memcpy(address, entry->address, 6); 3594 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3595 btstack_memory_whitelist_entry_free(entry); 3596 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3597 return true; 3598 } 3599 } 3600 } 3601 3602 // start connecting 3603 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3604 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3605 bd_addr_t null_addr; 3606 memset(null_addr, 0, 6); 3607 hci_send_cmd(&hci_le_create_connection, 3608 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3609 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3610 1, // use whitelist 3611 0, // peer address type 3612 null_addr, // peer bd addr 3613 hci_stack->le_own_addr_type, // our addr type: 3614 hci_stack->le_connection_interval_min, // conn interval min 3615 hci_stack->le_connection_interval_max, // conn interval max 3616 hci_stack->le_connection_latency, // conn latency 3617 hci_stack->le_supervision_timeout, // conn latency 3618 hci_stack->le_minimum_ce_length, // min ce length 3619 hci_stack->le_maximum_ce_length // max ce length 3620 ); 3621 return true; 3622 } 3623 #endif 3624 return false; 3625 } 3626 #endif 3627 3628 static bool hci_run_general_pending_commmands(void){ 3629 btstack_linked_item_t * it; 3630 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3631 hci_connection_t * connection = (hci_connection_t *) it; 3632 3633 switch(connection->state){ 3634 case SEND_CREATE_CONNECTION: 3635 switch(connection->address_type){ 3636 #ifdef ENABLE_CLASSIC 3637 case BD_ADDR_TYPE_ACL: 3638 log_info("sending hci_create_connection"); 3639 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3640 break; 3641 #endif 3642 default: 3643 #ifdef ENABLE_BLE 3644 #ifdef ENABLE_LE_CENTRAL 3645 // track outgoing connection 3646 hci_stack->outgoing_addr_type = connection->address_type; 3647 (void)memcpy(hci_stack->outgoing_addr, 3648 connection->address, 6); 3649 log_info("sending hci_le_create_connection"); 3650 hci_send_cmd(&hci_le_create_connection, 3651 hci_stack->le_connection_scan_interval, // conn scan interval 3652 hci_stack->le_connection_scan_window, // conn scan windows 3653 0, // don't use whitelist 3654 connection->address_type, // peer address type 3655 connection->address, // peer bd addr 3656 hci_stack->le_own_addr_type, // our addr type: 3657 hci_stack->le_connection_interval_min, // conn interval min 3658 hci_stack->le_connection_interval_max, // conn interval max 3659 hci_stack->le_connection_latency, // conn latency 3660 hci_stack->le_supervision_timeout, // conn latency 3661 hci_stack->le_minimum_ce_length, // min ce length 3662 hci_stack->le_maximum_ce_length // max ce length 3663 ); 3664 connection->state = SENT_CREATE_CONNECTION; 3665 #endif 3666 #endif 3667 break; 3668 } 3669 return true; 3670 3671 #ifdef ENABLE_CLASSIC 3672 case RECEIVED_CONNECTION_REQUEST: 3673 connection->role = HCI_ROLE_SLAVE; 3674 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3675 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3676 connection->state = ACCEPTED_CONNECTION_REQUEST; 3677 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3678 } 3679 return true; 3680 #endif 3681 3682 #ifdef ENABLE_BLE 3683 #ifdef ENABLE_LE_CENTRAL 3684 case SEND_CANCEL_CONNECTION: 3685 connection->state = SENT_CANCEL_CONNECTION; 3686 hci_send_cmd(&hci_le_create_connection_cancel); 3687 return true; 3688 #endif 3689 #endif 3690 case SEND_DISCONNECT: 3691 connection->state = SENT_DISCONNECT; 3692 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3693 return true; 3694 3695 default: 3696 break; 3697 } 3698 3699 // no further commands if connection is about to get shut down 3700 if (connection->state == SENT_DISCONNECT) continue; 3701 3702 if (connection->authentication_flags & READ_RSSI){ 3703 connectionClearAuthenticationFlags(connection, READ_RSSI); 3704 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3705 return true; 3706 } 3707 3708 #ifdef ENABLE_CLASSIC 3709 3710 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3711 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3712 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3713 return true; 3714 } 3715 3716 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3717 log_info("responding to link key request"); 3718 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3719 link_key_t link_key; 3720 link_key_type_t link_key_type; 3721 if ( hci_stack->link_key_db 3722 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3723 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3724 connection->link_key_type = link_key_type; 3725 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3726 } else { 3727 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3728 } 3729 return true; 3730 } 3731 3732 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3733 log_info("denying to pin request"); 3734 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3735 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3736 return true; 3737 } 3738 3739 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3740 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3741 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3742 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3743 // tweak authentication requirements 3744 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3745 if (connection->bonding_flags & BONDING_DEDICATED){ 3746 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3747 } 3748 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3749 authreq |= 1; 3750 } 3751 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3752 } else { 3753 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3754 } 3755 return true; 3756 } 3757 3758 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3759 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3760 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3761 return true; 3762 } 3763 3764 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3765 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3766 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3767 return true; 3768 } 3769 3770 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3771 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3772 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3773 return true; 3774 } 3775 3776 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3777 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3778 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3779 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3780 return true; 3781 } 3782 3783 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3784 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3785 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3786 return true; 3787 } 3788 3789 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3790 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3791 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3792 return true; 3793 } 3794 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3795 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3796 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3797 return true; 3798 } 3799 #endif 3800 3801 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3802 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3803 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3804 return true; 3805 } 3806 3807 #ifdef ENABLE_CLASSIC 3808 uint16_t sniff_min_interval; 3809 switch (connection->sniff_min_interval){ 3810 case 0: 3811 break; 3812 case 0xffff: 3813 connection->sniff_min_interval = 0; 3814 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3815 return true; 3816 default: 3817 sniff_min_interval = connection->sniff_min_interval; 3818 connection->sniff_min_interval = 0; 3819 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3820 return true; 3821 } 3822 #endif 3823 3824 #ifdef ENABLE_BLE 3825 switch (connection->le_con_parameter_update_state){ 3826 // response to L2CAP CON PARAMETER UPDATE REQUEST 3827 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3828 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3829 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3830 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3831 0x0000, 0xffff); 3832 return true; 3833 case CON_PARAMETER_UPDATE_REPLY: 3834 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3835 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3836 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3837 0x0000, 0xffff); 3838 return true; 3839 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3840 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3841 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3842 return true; 3843 default: 3844 break; 3845 } 3846 if (connection->le_phy_update_all_phys != 0xff){ 3847 uint8_t all_phys = connection->le_phy_update_all_phys; 3848 connection->le_phy_update_all_phys = 0xff; 3849 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); 3850 return true; 3851 } 3852 #endif 3853 } 3854 return false; 3855 } 3856 3857 static void hci_run(void){ 3858 3859 bool done; 3860 3861 // send continuation fragments first, as they block the prepared packet buffer 3862 done = hci_run_acl_fragments(); 3863 if (done) return; 3864 3865 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3866 // send host num completed packets next as they don't require num_cmd_packets > 0 3867 if (!hci_can_send_comand_packet_transport()) return; 3868 if (hci_stack->host_completed_packets){ 3869 hci_host_num_completed_packets(); 3870 return; 3871 } 3872 #endif 3873 3874 if (!hci_can_send_command_packet_now()) return; 3875 3876 // global/non-connection oriented commands 3877 3878 3879 #ifdef ENABLE_CLASSIC 3880 // general gap classic 3881 done = hci_run_general_gap_classic(); 3882 if (done) return; 3883 #endif 3884 3885 #ifdef ENABLE_BLE 3886 // general gap le 3887 done = hci_run_general_gap_le(); 3888 if (done) return; 3889 #endif 3890 3891 // send pending HCI commands 3892 done = hci_run_general_pending_commmands(); 3893 if (done) return; 3894 3895 // stack state sub statemachines 3896 hci_connection_t * connection; 3897 switch (hci_stack->state){ 3898 case HCI_STATE_INITIALIZING: 3899 hci_initializing_run(); 3900 break; 3901 3902 case HCI_STATE_HALTING: 3903 3904 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3905 switch (hci_stack->substate){ 3906 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3907 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3908 3909 #ifdef ENABLE_BLE 3910 #ifdef ENABLE_LE_CENTRAL 3911 // free whitelist entries 3912 { 3913 btstack_linked_list_iterator_t lit; 3914 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3915 while (btstack_linked_list_iterator_has_next(&lit)){ 3916 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3917 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3918 btstack_memory_whitelist_entry_free(entry); 3919 } 3920 } 3921 #endif 3922 #endif 3923 // close all open connections 3924 connection = (hci_connection_t *) hci_stack->connections; 3925 if (connection){ 3926 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3927 if (!hci_can_send_command_packet_now()) return; 3928 3929 // check state 3930 if (connection->state == SENT_DISCONNECT) return; 3931 connection->state = SENT_DISCONNECT; 3932 3933 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3934 3935 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3936 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3937 3938 // ... which would be ignored anyway as we shutdown (free) the connection now 3939 hci_shutdown_connection(connection); 3940 3941 // finally, send the disconnect command 3942 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3943 return; 3944 } 3945 3946 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3947 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3948 log_info("HCI_STATE_HALTING: wait 50 ms"); 3949 hci_stack->substate = HCI_HALTING_W4_TIMER; 3950 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3951 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3952 btstack_run_loop_add_timer(&hci_stack->timeout); 3953 break; 3954 } 3955 3956 /* fall through */ 3957 3958 case HCI_HALTING_CLOSE: 3959 log_info("HCI_STATE_HALTING, calling off"); 3960 3961 // switch mode 3962 hci_power_control_off(); 3963 3964 log_info("HCI_STATE_HALTING, emitting state"); 3965 hci_emit_state(); 3966 log_info("HCI_STATE_HALTING, done"); 3967 break; 3968 3969 case HCI_HALTING_W4_TIMER: 3970 // keep waiting 3971 3972 break; 3973 default: 3974 break; 3975 } 3976 3977 break; 3978 3979 case HCI_STATE_FALLING_ASLEEP: 3980 switch(hci_stack->substate) { 3981 case HCI_FALLING_ASLEEP_DISCONNECT: 3982 log_info("HCI_STATE_FALLING_ASLEEP"); 3983 // close all open connections 3984 connection = (hci_connection_t *) hci_stack->connections; 3985 3986 #ifdef HAVE_PLATFORM_IPHONE_OS 3987 // don't close connections, if H4 supports power management 3988 if (btstack_control_iphone_power_management_enabled()){ 3989 connection = NULL; 3990 } 3991 #endif 3992 if (connection){ 3993 3994 // send disconnect 3995 if (!hci_can_send_command_packet_now()) return; 3996 3997 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3998 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3999 4000 // send disconnected event right away - causes higher layer connections to get closed, too. 4001 hci_shutdown_connection(connection); 4002 return; 4003 } 4004 4005 if (hci_classic_supported()){ 4006 // disable page and inquiry scan 4007 if (!hci_can_send_command_packet_now()) return; 4008 4009 log_info("HCI_STATE_HALTING, disabling inq scans"); 4010 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4011 4012 // continue in next sub state 4013 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4014 break; 4015 } 4016 4017 /* fall through */ 4018 4019 case HCI_FALLING_ASLEEP_COMPLETE: 4020 log_info("HCI_STATE_HALTING, calling sleep"); 4021 #ifdef HAVE_PLATFORM_IPHONE_OS 4022 // don't actually go to sleep, if H4 supports power management 4023 if (btstack_control_iphone_power_management_enabled()){ 4024 // SLEEP MODE reached 4025 hci_stack->state = HCI_STATE_SLEEPING; 4026 hci_emit_state(); 4027 break; 4028 } 4029 #endif 4030 // switch mode 4031 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4032 hci_emit_state(); 4033 break; 4034 4035 default: 4036 break; 4037 } 4038 break; 4039 4040 default: 4041 break; 4042 } 4043 } 4044 4045 int hci_send_cmd_packet(uint8_t *packet, int size){ 4046 // house-keeping 4047 4048 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4049 hci_stack->loopback_mode = packet[3]; 4050 } 4051 4052 #ifdef ENABLE_CLASSIC 4053 bd_addr_t addr; 4054 hci_connection_t * conn; 4055 4056 // create_connection? 4057 if (IS_COMMAND(packet, hci_create_connection)){ 4058 reverse_bd_addr(&packet[3], addr); 4059 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4060 4061 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4062 if (!conn){ 4063 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4064 if (!conn){ 4065 // notify client that alloc failed 4066 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4067 return -1; // packet not sent to controller 4068 } 4069 conn->state = SEND_CREATE_CONNECTION; 4070 } 4071 log_info("conn state %u", conn->state); 4072 switch (conn->state){ 4073 // if connection active exists 4074 case OPEN: 4075 // and OPEN, emit connection complete command 4076 hci_emit_connection_complete(addr, conn->con_handle, 0); 4077 return -1; // packet not sent to controller 4078 case RECEIVED_DISCONNECTION_COMPLETE: 4079 // create connection triggered in disconnect complete event, let's do it now 4080 break; 4081 case SEND_CREATE_CONNECTION: 4082 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4083 break; 4084 default: 4085 // otherwise, just ignore as it is already in the open process 4086 return -1; // packet not sent to controller 4087 } 4088 conn->state = SENT_CREATE_CONNECTION; 4089 4090 // track outgoing connection 4091 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4092 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4093 } 4094 4095 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4096 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4097 } 4098 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4099 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4100 } 4101 4102 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4103 if (hci_stack->link_key_db){ 4104 reverse_bd_addr(&packet[3], addr); 4105 hci_stack->link_key_db->delete_link_key(addr); 4106 } 4107 } 4108 4109 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4110 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4111 reverse_bd_addr(&packet[3], addr); 4112 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4113 if (conn){ 4114 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4115 } 4116 } 4117 4118 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4119 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4120 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4121 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4122 reverse_bd_addr(&packet[3], addr); 4123 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4124 if (conn){ 4125 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4126 } 4127 } 4128 4129 #ifdef ENABLE_SCO_OVER_HCI 4130 // setup_synchronous_connection? Voice setting at offset 22 4131 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4132 // TODO: compare to current setting if sco connection already active 4133 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4134 } 4135 // accept_synchronus_connection? Voice setting at offset 18 4136 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4137 // TODO: compare to current setting if sco connection already active 4138 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4139 } 4140 #endif 4141 #endif 4142 4143 #ifdef ENABLE_BLE 4144 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4145 hci_stack->le_random_address_set = 1; 4146 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4147 } 4148 #ifdef ENABLE_LE_PERIPHERAL 4149 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4150 hci_stack->le_advertisements_active = packet[3]; 4151 } 4152 #endif 4153 #ifdef ENABLE_LE_CENTRAL 4154 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4155 // white list used? 4156 uint8_t initiator_filter_policy = packet[7]; 4157 switch (initiator_filter_policy){ 4158 case 0: 4159 // whitelist not used 4160 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4161 break; 4162 case 1: 4163 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4164 break; 4165 default: 4166 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4167 break; 4168 } 4169 } 4170 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4171 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4172 } 4173 #endif 4174 #endif 4175 4176 hci_stack->num_cmd_packets--; 4177 4178 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4179 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4180 } 4181 4182 // disconnect because of security block 4183 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4184 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4185 if (!connection) return; 4186 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4187 } 4188 4189 4190 // Configure Secure Simple Pairing 4191 4192 #ifdef ENABLE_CLASSIC 4193 4194 // enable will enable SSP during init 4195 void gap_ssp_set_enable(int enable){ 4196 hci_stack->ssp_enable = enable; 4197 } 4198 4199 static int hci_local_ssp_activated(void){ 4200 return gap_ssp_supported() && hci_stack->ssp_enable; 4201 } 4202 4203 // if set, BTstack will respond to io capability request using authentication requirement 4204 void gap_ssp_set_io_capability(int io_capability){ 4205 hci_stack->ssp_io_capability = io_capability; 4206 } 4207 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4208 hci_stack->ssp_authentication_requirement = authentication_requirement; 4209 } 4210 4211 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4212 void gap_ssp_set_auto_accept(int auto_accept){ 4213 hci_stack->ssp_auto_accept = auto_accept; 4214 } 4215 4216 void gap_secure_connections_enable(bool enable){ 4217 hci_stack->secure_connections_enable = enable; 4218 } 4219 4220 #endif 4221 4222 // va_list part of hci_send_cmd 4223 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4224 if (!hci_can_send_command_packet_now()){ 4225 log_error("hci_send_cmd called but cannot send packet now"); 4226 return 0; 4227 } 4228 4229 // for HCI INITIALIZATION 4230 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4231 hci_stack->last_cmd_opcode = cmd->opcode; 4232 4233 hci_reserve_packet_buffer(); 4234 uint8_t * packet = hci_stack->hci_packet_buffer; 4235 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4236 int err = hci_send_cmd_packet(packet, size); 4237 4238 // release packet buffer on error or for synchronous transport implementations 4239 if ((err < 0) || hci_transport_synchronous()){ 4240 hci_release_packet_buffer(); 4241 hci_emit_transport_packet_sent(); 4242 } 4243 4244 return err; 4245 } 4246 4247 /** 4248 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4249 */ 4250 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4251 va_list argptr; 4252 va_start(argptr, cmd); 4253 int res = hci_send_cmd_va_arg(cmd, argptr); 4254 va_end(argptr); 4255 return res; 4256 } 4257 4258 // Create various non-HCI events. 4259 // TODO: generalize, use table similar to hci_create_command 4260 4261 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4262 // dump packet 4263 if (dump) { 4264 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4265 } 4266 4267 // dispatch to all event handlers 4268 btstack_linked_list_iterator_t it; 4269 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4270 while (btstack_linked_list_iterator_has_next(&it)){ 4271 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4272 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4273 } 4274 } 4275 4276 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4277 if (!hci_stack->acl_packet_handler) return; 4278 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4279 } 4280 4281 #ifdef ENABLE_CLASSIC 4282 static void hci_notify_if_sco_can_send_now(void){ 4283 // notify SCO sender if waiting 4284 if (!hci_stack->sco_waiting_for_can_send_now) return; 4285 if (hci_can_send_sco_packet_now()){ 4286 hci_stack->sco_waiting_for_can_send_now = 0; 4287 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4288 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4289 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4290 } 4291 } 4292 4293 // parsing end emitting has been merged to reduce code size 4294 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4295 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4296 4297 uint8_t * eir_data; 4298 ad_context_t context; 4299 const uint8_t * name; 4300 uint8_t name_len; 4301 4302 if (size < 3) return; 4303 4304 int event_type = hci_event_packet_get_type(packet); 4305 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4306 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4307 4308 switch (event_type){ 4309 case HCI_EVENT_INQUIRY_RESULT: 4310 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4311 if (size != (3 + (num_responses * 14))) return; 4312 break; 4313 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4314 if (size != 257) return; 4315 if (num_responses != 1) return; 4316 break; 4317 default: 4318 return; 4319 } 4320 4321 // event[1] is set at the end 4322 int i; 4323 for (i=0; i<num_responses;i++){ 4324 memset(event, 0, sizeof(event)); 4325 event[0] = GAP_EVENT_INQUIRY_RESULT; 4326 uint8_t event_size = 18; // if name is not set by EIR 4327 4328 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4329 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4330 (void)memcpy(&event[9], 4331 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4332 3); // class of device 4333 (void)memcpy(&event[12], 4334 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4335 2); // clock offset 4336 4337 switch (event_type){ 4338 case HCI_EVENT_INQUIRY_RESULT: 4339 // 14,15,16,17 = 0, size 18 4340 break; 4341 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4342 event[14] = 1; 4343 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4344 // 16,17 = 0, size 18 4345 break; 4346 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4347 event[14] = 1; 4348 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4349 // EIR packets only contain a single inquiry response 4350 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4351 name = NULL; 4352 // Iterate over EIR data 4353 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4354 uint8_t data_type = ad_iterator_get_data_type(&context); 4355 uint8_t data_size = ad_iterator_get_data_len(&context); 4356 const uint8_t * data = ad_iterator_get_data(&context); 4357 // Prefer Complete Local Name over Shortend Local Name 4358 switch (data_type){ 4359 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4360 if (name) continue; 4361 /* fall through */ 4362 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4363 name = data; 4364 name_len = data_size; 4365 break; 4366 default: 4367 break; 4368 } 4369 } 4370 if (name){ 4371 event[16] = 1; 4372 // truncate name if needed 4373 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4374 event[17] = len; 4375 (void)memcpy(&event[18], name, len); 4376 event_size += len; 4377 } 4378 break; 4379 } 4380 event[1] = event_size - 2; 4381 hci_emit_event(event, event_size, 1); 4382 } 4383 } 4384 #endif 4385 4386 void hci_emit_state(void){ 4387 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4388 uint8_t event[3]; 4389 event[0] = BTSTACK_EVENT_STATE; 4390 event[1] = sizeof(event) - 2; 4391 event[2] = hci_stack->state; 4392 hci_emit_event(event, sizeof(event), 1); 4393 } 4394 4395 #ifdef ENABLE_CLASSIC 4396 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4397 uint8_t event[13]; 4398 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4399 event[1] = sizeof(event) - 2; 4400 event[2] = status; 4401 little_endian_store_16(event, 3, con_handle); 4402 reverse_bd_addr(address, &event[5]); 4403 event[11] = 1; // ACL connection 4404 event[12] = 0; // encryption disabled 4405 hci_emit_event(event, sizeof(event), 1); 4406 } 4407 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4408 if (disable_l2cap_timeouts) return; 4409 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4410 uint8_t event[4]; 4411 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4412 event[1] = sizeof(event) - 2; 4413 little_endian_store_16(event, 2, conn->con_handle); 4414 hci_emit_event(event, sizeof(event), 1); 4415 } 4416 #endif 4417 4418 #ifdef ENABLE_BLE 4419 #ifdef ENABLE_LE_CENTRAL 4420 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4421 uint8_t event[21]; 4422 event[0] = HCI_EVENT_LE_META; 4423 event[1] = sizeof(event) - 2; 4424 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4425 event[3] = status; 4426 little_endian_store_16(event, 4, con_handle); 4427 event[6] = 0; // TODO: role 4428 event[7] = address_type; 4429 reverse_bd_addr(address, &event[8]); 4430 little_endian_store_16(event, 14, 0); // interval 4431 little_endian_store_16(event, 16, 0); // latency 4432 little_endian_store_16(event, 18, 0); // supervision timeout 4433 event[20] = 0; // master clock accuracy 4434 hci_emit_event(event, sizeof(event), 1); 4435 } 4436 #endif 4437 #endif 4438 4439 static void hci_emit_transport_packet_sent(void){ 4440 // notify upper stack that it might be possible to send again 4441 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4442 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4443 } 4444 4445 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4446 uint8_t event[6]; 4447 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4448 event[1] = sizeof(event) - 2; 4449 event[2] = 0; // status = OK 4450 little_endian_store_16(event, 3, con_handle); 4451 event[5] = reason; 4452 hci_emit_event(event, sizeof(event), 1); 4453 } 4454 4455 static void hci_emit_nr_connections_changed(void){ 4456 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4457 uint8_t event[3]; 4458 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4459 event[1] = sizeof(event) - 2; 4460 event[2] = nr_hci_connections(); 4461 hci_emit_event(event, sizeof(event), 1); 4462 } 4463 4464 static void hci_emit_hci_open_failed(void){ 4465 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4466 uint8_t event[2]; 4467 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4468 event[1] = sizeof(event) - 2; 4469 hci_emit_event(event, sizeof(event), 1); 4470 } 4471 4472 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4473 log_info("hci_emit_dedicated_bonding_result %u ", status); 4474 uint8_t event[9]; 4475 int pos = 0; 4476 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4477 event[pos++] = sizeof(event) - 2; 4478 event[pos++] = status; 4479 reverse_bd_addr(address, &event[pos]); 4480 hci_emit_event(event, sizeof(event), 1); 4481 } 4482 4483 4484 #ifdef ENABLE_CLASSIC 4485 4486 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4487 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4488 uint8_t event[5]; 4489 int pos = 0; 4490 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4491 event[pos++] = sizeof(event) - 2; 4492 little_endian_store_16(event, 2, con_handle); 4493 pos += 2; 4494 event[pos++] = level; 4495 hci_emit_event(event, sizeof(event), 1); 4496 } 4497 4498 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4499 if (!connection) return LEVEL_0; 4500 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4501 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4502 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4503 // LEVEL 4 always requires 128 bit encrytion key size 4504 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4505 security_level = LEVEL_3; 4506 } 4507 return security_level; 4508 } 4509 4510 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4511 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4512 uint8_t event[3]; 4513 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4514 event[1] = sizeof(event) - 2; 4515 event[2] = enabled; 4516 hci_emit_event(event, sizeof(event), 1); 4517 } 4518 4519 // query if remote side supports eSCO 4520 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4521 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4522 if (!connection) return 0; 4523 return connection->remote_supported_feature_eSCO; 4524 } 4525 4526 // query if remote side supports SSP 4527 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4528 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4529 if (!connection) return 0; 4530 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4531 } 4532 4533 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4534 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4535 } 4536 4537 // GAP API 4538 /** 4539 * @bbrief enable/disable bonding. default is enabled 4540 * @praram enabled 4541 */ 4542 void gap_set_bondable_mode(int enable){ 4543 hci_stack->bondable = enable ? 1 : 0; 4544 } 4545 /** 4546 * @brief Get bondable mode. 4547 * @return 1 if bondable 4548 */ 4549 int gap_get_bondable_mode(void){ 4550 return hci_stack->bondable; 4551 } 4552 4553 /** 4554 * @brief map link keys to security levels 4555 */ 4556 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4557 switch (link_key_type){ 4558 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4559 return LEVEL_4; 4560 case COMBINATION_KEY: 4561 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4562 return LEVEL_3; 4563 default: 4564 return LEVEL_2; 4565 } 4566 } 4567 4568 /** 4569 * @brief map link keys to secure connection yes/no 4570 */ 4571 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4572 switch (link_key_type){ 4573 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4574 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4575 return 1; 4576 default: 4577 return 0; 4578 } 4579 } 4580 4581 /** 4582 * @brief map link keys to authenticated 4583 */ 4584 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4585 switch (link_key_type){ 4586 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4587 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4588 return 1; 4589 default: 4590 return 0; 4591 } 4592 } 4593 4594 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4595 log_info("gap_mitm_protection_required_for_security_level %u", level); 4596 return level > LEVEL_2; 4597 } 4598 4599 /** 4600 * @brief get current security level 4601 */ 4602 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4603 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4604 if (!connection) return LEVEL_0; 4605 return gap_security_level_for_connection(connection); 4606 } 4607 4608 /** 4609 * @brief request connection to device to 4610 * @result GAP_AUTHENTICATION_RESULT 4611 */ 4612 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4613 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4614 if (!connection){ 4615 hci_emit_security_level(con_handle, LEVEL_0); 4616 return; 4617 } 4618 gap_security_level_t current_level = gap_security_level(con_handle); 4619 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4620 requested_level, connection->requested_security_level, current_level); 4621 4622 // assumption: earlier requested security higher than current level => security request is active 4623 if (current_level < connection->requested_security_level){ 4624 if (connection->requested_security_level < requested_level){ 4625 // increase requested level as new level is higher 4626 4627 // TODO: handle re-authentication when done 4628 4629 connection->requested_security_level = requested_level; 4630 } 4631 return; 4632 } 4633 4634 // no request active, notify if security sufficient 4635 if (requested_level <= current_level){ 4636 hci_emit_security_level(con_handle, current_level); 4637 return; 4638 } 4639 4640 // start pairing to increase security level 4641 connection->requested_security_level = requested_level; 4642 4643 #if 0 4644 // sending encryption request without a link key results in an error. 4645 // TODO: figure out how to use it properly 4646 4647 // would enabling ecnryption suffice (>= LEVEL_2)? 4648 if (hci_stack->link_key_db){ 4649 link_key_type_t link_key_type; 4650 link_key_t link_key; 4651 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4652 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4653 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4654 return; 4655 } 4656 } 4657 } 4658 #endif 4659 4660 // start to authenticate connection 4661 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4662 hci_run(); 4663 } 4664 4665 /** 4666 * @brief start dedicated bonding with device. disconnect after bonding 4667 * @param device 4668 * @param request MITM protection 4669 * @result GAP_DEDICATED_BONDING_COMPLETE 4670 */ 4671 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4672 4673 // create connection state machine 4674 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4675 4676 if (!connection){ 4677 return BTSTACK_MEMORY_ALLOC_FAILED; 4678 } 4679 4680 // delete linkn key 4681 gap_drop_link_key_for_bd_addr(device); 4682 4683 // configure LEVEL_2/3, dedicated bonding 4684 connection->state = SEND_CREATE_CONNECTION; 4685 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4686 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4687 connection->bonding_flags = BONDING_DEDICATED; 4688 4689 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4690 4691 // handle: connnection failure (connection complete != ok) 4692 // handle: authentication failure 4693 // handle: disconnect on done 4694 4695 hci_run(); 4696 4697 return 0; 4698 } 4699 #endif 4700 4701 void gap_set_local_name(const char * local_name){ 4702 hci_stack->local_name = local_name; 4703 } 4704 4705 4706 #ifdef ENABLE_BLE 4707 4708 #ifdef ENABLE_LE_CENTRAL 4709 void gap_start_scan(void){ 4710 hci_stack->le_scanning_enabled = 1; 4711 hci_run(); 4712 } 4713 4714 void gap_stop_scan(void){ 4715 hci_stack->le_scanning_enabled = 0; 4716 hci_run(); 4717 } 4718 4719 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4720 hci_stack->le_scan_type = scan_type; 4721 hci_stack->le_scan_interval = scan_interval; 4722 hci_stack->le_scan_window = scan_window; 4723 hci_run(); 4724 } 4725 4726 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4727 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4728 if (!conn){ 4729 log_info("gap_connect: no connection exists yet, creating context"); 4730 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4731 if (!conn){ 4732 // notify client that alloc failed 4733 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4734 log_info("gap_connect: failed to alloc hci_connection_t"); 4735 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4736 } 4737 conn->state = SEND_CREATE_CONNECTION; 4738 log_info("gap_connect: send create connection next"); 4739 hci_run(); 4740 return ERROR_CODE_SUCCESS; 4741 } 4742 4743 if (!hci_is_le_connection(conn) || 4744 (conn->state == SEND_CREATE_CONNECTION) || 4745 (conn->state == SENT_CREATE_CONNECTION)) { 4746 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4747 log_error("gap_connect: classic connection or connect is already being created"); 4748 return GATT_CLIENT_IN_WRONG_STATE; 4749 } 4750 4751 // check if connection was just disconnected 4752 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4753 log_info("gap_connect: send create connection (again)"); 4754 conn->state = SEND_CREATE_CONNECTION; 4755 hci_run(); 4756 return ERROR_CODE_SUCCESS; 4757 } 4758 4759 log_info("gap_connect: context exists with state %u", conn->state); 4760 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4761 hci_run(); 4762 return ERROR_CODE_SUCCESS; 4763 } 4764 4765 // @assumption: only a single outgoing LE Connection exists 4766 static hci_connection_t * gap_get_outgoing_connection(void){ 4767 btstack_linked_item_t *it; 4768 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4769 hci_connection_t * conn = (hci_connection_t *) it; 4770 if (!hci_is_le_connection(conn)) continue; 4771 switch (conn->state){ 4772 case SEND_CREATE_CONNECTION: 4773 case SENT_CREATE_CONNECTION: 4774 case SENT_CANCEL_CONNECTION: 4775 return conn; 4776 default: 4777 break; 4778 }; 4779 } 4780 return NULL; 4781 } 4782 4783 uint8_t gap_connect_cancel(void){ 4784 hci_connection_t * conn = gap_get_outgoing_connection(); 4785 if (!conn) return 0; 4786 switch (conn->state){ 4787 case SEND_CREATE_CONNECTION: 4788 // skip sending create connection and emit event instead 4789 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4790 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4791 btstack_memory_hci_connection_free( conn ); 4792 break; 4793 case SENT_CREATE_CONNECTION: 4794 // request to send cancel connection 4795 conn->state = SEND_CANCEL_CONNECTION; 4796 hci_run(); 4797 break; 4798 default: 4799 break; 4800 } 4801 return 0; 4802 } 4803 #endif 4804 4805 #ifdef ENABLE_LE_CENTRAL 4806 /** 4807 * @brief Set connection parameters for outgoing connections 4808 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4809 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4810 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4811 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4812 * @param conn_latency, default: 4 4813 * @param supervision_timeout (unit: 10ms), default: 720 ms 4814 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4815 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4816 */ 4817 4818 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4819 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4820 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4821 hci_stack->le_connection_scan_interval = conn_scan_interval; 4822 hci_stack->le_connection_scan_window = conn_scan_window; 4823 hci_stack->le_connection_interval_min = conn_interval_min; 4824 hci_stack->le_connection_interval_max = conn_interval_max; 4825 hci_stack->le_connection_latency = conn_latency; 4826 hci_stack->le_supervision_timeout = supervision_timeout; 4827 hci_stack->le_minimum_ce_length = min_ce_length; 4828 hci_stack->le_maximum_ce_length = max_ce_length; 4829 } 4830 #endif 4831 4832 /** 4833 * @brief Updates the connection parameters for a given LE connection 4834 * @param handle 4835 * @param conn_interval_min (unit: 1.25ms) 4836 * @param conn_interval_max (unit: 1.25ms) 4837 * @param conn_latency 4838 * @param supervision_timeout (unit: 10ms) 4839 * @returns 0 if ok 4840 */ 4841 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4842 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4843 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4844 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4845 connection->le_conn_interval_min = conn_interval_min; 4846 connection->le_conn_interval_max = conn_interval_max; 4847 connection->le_conn_latency = conn_latency; 4848 connection->le_supervision_timeout = supervision_timeout; 4849 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4850 hci_run(); 4851 return 0; 4852 } 4853 4854 /** 4855 * @brief Request an update of the connection parameter for a given LE connection 4856 * @param handle 4857 * @param conn_interval_min (unit: 1.25ms) 4858 * @param conn_interval_max (unit: 1.25ms) 4859 * @param conn_latency 4860 * @param supervision_timeout (unit: 10ms) 4861 * @returns 0 if ok 4862 */ 4863 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4864 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4865 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4866 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4867 connection->le_conn_interval_min = conn_interval_min; 4868 connection->le_conn_interval_max = conn_interval_max; 4869 connection->le_conn_latency = conn_latency; 4870 connection->le_supervision_timeout = supervision_timeout; 4871 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4872 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4873 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4874 return 0; 4875 } 4876 4877 #ifdef ENABLE_LE_PERIPHERAL 4878 4879 static void gap_advertisments_changed(void){ 4880 // disable advertisements before updating adv, scan data, or adv params 4881 if (hci_stack->le_advertisements_active){ 4882 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4883 } 4884 hci_run(); 4885 } 4886 4887 /** 4888 * @brief Set Advertisement Data 4889 * @param advertising_data_length 4890 * @param advertising_data (max 31 octets) 4891 * @note data is not copied, pointer has to stay valid 4892 */ 4893 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4894 hci_stack->le_advertisements_data_len = advertising_data_length; 4895 hci_stack->le_advertisements_data = advertising_data; 4896 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4897 gap_advertisments_changed(); 4898 } 4899 4900 /** 4901 * @brief Set Scan Response Data 4902 * @param advertising_data_length 4903 * @param advertising_data (max 31 octets) 4904 * @note data is not copied, pointer has to stay valid 4905 */ 4906 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4907 hci_stack->le_scan_response_data_len = scan_response_data_length; 4908 hci_stack->le_scan_response_data = scan_response_data; 4909 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4910 gap_advertisments_changed(); 4911 } 4912 4913 /** 4914 * @brief Set Advertisement Parameters 4915 * @param adv_int_min 4916 * @param adv_int_max 4917 * @param adv_type 4918 * @param direct_address_type 4919 * @param direct_address 4920 * @param channel_map 4921 * @param filter_policy 4922 * 4923 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4924 */ 4925 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4926 uint8_t direct_address_typ, bd_addr_t direct_address, 4927 uint8_t channel_map, uint8_t filter_policy) { 4928 4929 hci_stack->le_advertisements_interval_min = adv_int_min; 4930 hci_stack->le_advertisements_interval_max = adv_int_max; 4931 hci_stack->le_advertisements_type = adv_type; 4932 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4933 hci_stack->le_advertisements_channel_map = channel_map; 4934 hci_stack->le_advertisements_filter_policy = filter_policy; 4935 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4936 6); 4937 4938 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4939 gap_advertisments_changed(); 4940 } 4941 4942 /** 4943 * @brief Enable/Disable Advertisements 4944 * @param enabled 4945 */ 4946 void gap_advertisements_enable(int enabled){ 4947 hci_stack->le_advertisements_enabled = enabled; 4948 if (enabled && !hci_stack->le_advertisements_active){ 4949 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4950 } 4951 if (!enabled && hci_stack->le_advertisements_active){ 4952 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4953 } 4954 hci_run(); 4955 } 4956 4957 #endif 4958 4959 void hci_le_set_own_address_type(uint8_t own_address_type){ 4960 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4961 if (own_address_type == hci_stack->le_own_addr_type) return; 4962 hci_stack->le_own_addr_type = own_address_type; 4963 4964 #ifdef ENABLE_LE_PERIPHERAL 4965 // update advertisement parameters, too 4966 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4967 gap_advertisments_changed(); 4968 #endif 4969 #ifdef ENABLE_LE_CENTRAL 4970 // note: we don't update scan parameters or modify ongoing connection attempts 4971 #endif 4972 } 4973 4974 #endif 4975 4976 uint8_t gap_disconnect(hci_con_handle_t handle){ 4977 hci_connection_t * conn = hci_connection_for_handle(handle); 4978 if (!conn){ 4979 hci_emit_disconnection_complete(handle, 0); 4980 return 0; 4981 } 4982 // ignore if already disconnected 4983 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4984 return 0; 4985 } 4986 conn->state = SEND_DISCONNECT; 4987 hci_run(); 4988 return 0; 4989 } 4990 4991 int gap_read_rssi(hci_con_handle_t con_handle){ 4992 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4993 if (hci_connection == NULL) return 0; 4994 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4995 hci_run(); 4996 return 1; 4997 } 4998 4999 /** 5000 * @brief Get connection type 5001 * @param con_handle 5002 * @result connection_type 5003 */ 5004 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5005 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5006 if (!conn) return GAP_CONNECTION_INVALID; 5007 switch (conn->address_type){ 5008 case BD_ADDR_TYPE_LE_PUBLIC: 5009 case BD_ADDR_TYPE_LE_RANDOM: 5010 return GAP_CONNECTION_LE; 5011 case BD_ADDR_TYPE_SCO: 5012 return GAP_CONNECTION_SCO; 5013 case BD_ADDR_TYPE_ACL: 5014 return GAP_CONNECTION_ACL; 5015 default: 5016 return GAP_CONNECTION_INVALID; 5017 } 5018 } 5019 5020 #ifdef ENABLE_BLE 5021 5022 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){ 5023 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5024 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5025 5026 conn->le_phy_update_all_phys = all_phys; 5027 conn->le_phy_update_tx_phys = tx_phys; 5028 conn->le_phy_update_rx_phys = rx_phys; 5029 conn->le_phy_update_phy_options = phy_options; 5030 5031 hci_run(); 5032 5033 return 0; 5034 } 5035 5036 #ifdef ENABLE_LE_CENTRAL 5037 /** 5038 * @brief Auto Connection Establishment - Start Connecting to device 5039 * @param address_typ 5040 * @param address 5041 * @returns 0 if ok 5042 */ 5043 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5044 // check capacity 5045 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5046 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5047 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5048 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5049 entry->address_type = address_type; 5050 (void)memcpy(entry->address, address, 6); 5051 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5052 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5053 hci_run(); 5054 return 0; 5055 } 5056 5057 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5058 btstack_linked_list_iterator_t it; 5059 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5060 while (btstack_linked_list_iterator_has_next(&it)){ 5061 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5062 if (entry->address_type != address_type) continue; 5063 if (memcmp(entry->address, address, 6) != 0) continue; 5064 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5065 // remove from controller if already present 5066 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5067 continue; 5068 } 5069 // direclty remove entry from whitelist 5070 btstack_linked_list_iterator_remove(&it); 5071 btstack_memory_whitelist_entry_free(entry); 5072 } 5073 } 5074 5075 /** 5076 * @brief Auto Connection Establishment - Stop Connecting to device 5077 * @param address_typ 5078 * @param address 5079 * @returns 0 if ok 5080 */ 5081 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5082 hci_remove_from_whitelist(address_type, address); 5083 hci_run(); 5084 return 0; 5085 } 5086 5087 /** 5088 * @brief Auto Connection Establishment - Stop everything 5089 * @note Convenience function to stop all active auto connection attempts 5090 */ 5091 void gap_auto_connection_stop_all(void){ 5092 btstack_linked_list_iterator_t it; 5093 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5094 while (btstack_linked_list_iterator_has_next(&it)){ 5095 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5096 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5097 // remove from controller if already present 5098 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5099 continue; 5100 } 5101 // directly remove entry from whitelist 5102 btstack_linked_list_iterator_remove(&it); 5103 btstack_memory_whitelist_entry_free(entry); 5104 } 5105 hci_run(); 5106 } 5107 5108 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5109 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5110 if (!conn) return 0; 5111 return conn->le_connection_interval; 5112 } 5113 #endif 5114 #endif 5115 5116 #ifdef ENABLE_CLASSIC 5117 /** 5118 * @brief Set Extended Inquiry Response data 5119 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5120 * @note has to be done before stack starts up 5121 */ 5122 void gap_set_extended_inquiry_response(const uint8_t * data){ 5123 hci_stack->eir_data = data; 5124 } 5125 5126 /** 5127 * @brief Start GAP Classic Inquiry 5128 * @param duration in 1.28s units 5129 * @return 0 if ok 5130 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5131 */ 5132 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5133 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5134 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5135 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5136 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5137 } 5138 hci_stack->inquiry_state = duration_in_1280ms_units; 5139 hci_run(); 5140 return 0; 5141 } 5142 5143 /** 5144 * @brief Stop GAP Classic Inquiry 5145 * @returns 0 if ok 5146 */ 5147 int gap_inquiry_stop(void){ 5148 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5149 // emit inquiry complete event, before it even started 5150 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5151 hci_emit_event(event, sizeof(event), 1); 5152 return 0; 5153 } 5154 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5155 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5156 hci_run(); 5157 return 0; 5158 } 5159 5160 5161 /** 5162 * @brief Remote Name Request 5163 * @param addr 5164 * @param page_scan_repetition_mode 5165 * @param clock_offset only used when bit 15 is set 5166 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5167 */ 5168 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5169 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5170 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5171 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5172 hci_stack->remote_name_clock_offset = clock_offset; 5173 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5174 hci_run(); 5175 return 0; 5176 } 5177 5178 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5179 hci_stack->gap_pairing_state = state; 5180 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5181 hci_run(); 5182 return 0; 5183 } 5184 5185 /** 5186 * @brief Legacy Pairing Pin Code Response 5187 * @param addr 5188 * @param pin 5189 * @return 0 if ok 5190 */ 5191 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5192 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5193 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5194 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5195 } 5196 5197 /** 5198 * @brief Abort Legacy Pairing 5199 * @param addr 5200 * @param pin 5201 * @return 0 if ok 5202 */ 5203 int gap_pin_code_negative(bd_addr_t addr){ 5204 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5205 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5206 } 5207 5208 /** 5209 * @brief SSP Passkey Response 5210 * @param addr 5211 * @param passkey 5212 * @return 0 if ok 5213 */ 5214 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5215 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5216 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5217 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5218 } 5219 5220 /** 5221 * @brief Abort SSP Passkey Entry/Pairing 5222 * @param addr 5223 * @param pin 5224 * @return 0 if ok 5225 */ 5226 int gap_ssp_passkey_negative(bd_addr_t addr){ 5227 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5228 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5229 } 5230 5231 /** 5232 * @brief Accept SSP Numeric Comparison 5233 * @param addr 5234 * @param passkey 5235 * @return 0 if ok 5236 */ 5237 int gap_ssp_confirmation_response(bd_addr_t addr){ 5238 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5239 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5240 } 5241 5242 /** 5243 * @brief Abort SSP Numeric Comparison/Pairing 5244 * @param addr 5245 * @param pin 5246 * @return 0 if ok 5247 */ 5248 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5249 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5250 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5251 } 5252 5253 /** 5254 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5255 * @param inquiry_mode see bluetooth_defines.h 5256 */ 5257 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5258 hci_stack->inquiry_mode = mode; 5259 } 5260 5261 /** 5262 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5263 */ 5264 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5265 hci_stack->sco_voice_setting = voice_setting; 5266 } 5267 5268 /** 5269 * @brief Get SCO Voice Setting 5270 * @return current voice setting 5271 */ 5272 uint16_t hci_get_sco_voice_setting(void){ 5273 return hci_stack->sco_voice_setting; 5274 } 5275 5276 static int hci_have_usb_transport(void){ 5277 if (!hci_stack->hci_transport) return 0; 5278 const char * transport_name = hci_stack->hci_transport->name; 5279 if (!transport_name) return 0; 5280 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5281 } 5282 5283 /** @brief Get SCO packet length for current SCO Voice setting 5284 * @note Using SCO packets of the exact length is required for USB transfer 5285 * @return Length of SCO packets in bytes (not audio frames) 5286 */ 5287 int hci_get_sco_packet_length(void){ 5288 int sco_packet_length = 0; 5289 5290 #ifdef ENABLE_SCO_OVER_HCI 5291 5292 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5293 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5294 5295 if (hci_have_usb_transport()){ 5296 // see Core Spec for H2 USB Transfer. 5297 // 3 byte SCO header + 24 bytes per connection 5298 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5299 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5300 } else { 5301 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5302 sco_packet_length = 3 + 60 * multiplier; 5303 // assert that it still fits inside an SCO buffer 5304 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5305 sco_packet_length = 3 + 60; 5306 } 5307 } 5308 #endif 5309 return sco_packet_length; 5310 } 5311 5312 /** 5313 * @brief Sets the master/slave policy 5314 * @param policy (0: attempt to become master, 1: let connecting device decide) 5315 */ 5316 void hci_set_master_slave_policy(uint8_t policy){ 5317 hci_stack->master_slave_policy = policy; 5318 } 5319 5320 #endif 5321 5322 HCI_STATE hci_get_state(void){ 5323 return hci_stack->state; 5324 } 5325 5326 #ifdef ENABLE_CLASSIC 5327 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5328 hci_stack->gap_classic_accept_callback = accept_callback; 5329 } 5330 #endif 5331 5332 /** 5333 * @brief Set callback for Bluetooth Hardware Error 5334 */ 5335 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5336 hci_stack->hardware_error_callback = fn; 5337 } 5338 5339 void hci_disconnect_all(void){ 5340 btstack_linked_list_iterator_t it; 5341 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5342 while (btstack_linked_list_iterator_has_next(&it)){ 5343 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5344 if (con->state == SENT_DISCONNECT) continue; 5345 con->state = SEND_DISCONNECT; 5346 } 5347 hci_run(); 5348 } 5349 5350 uint16_t hci_get_manufacturer(void){ 5351 return hci_stack->manufacturer; 5352 } 5353 5354 #ifdef ENABLE_BLE 5355 5356 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5357 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5358 if (!hci_con) return NULL; 5359 return &hci_con->sm_connection; 5360 } 5361 5362 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5363 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5364 5365 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5366 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5367 if (hci_connection == NULL) return 0; 5368 if (hci_is_le_connection(hci_connection)){ 5369 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5370 if (sm_conn->sm_connection_encrypted) { 5371 return sm_conn->sm_actual_encryption_key_size; 5372 } 5373 } 5374 #ifdef ENABLE_CLASSIC 5375 else { 5376 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5377 return hci_connection->encryption_key_size; 5378 } 5379 } 5380 #endif 5381 return 0; 5382 } 5383 5384 int gap_authenticated(hci_con_handle_t con_handle){ 5385 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5386 if (hci_connection == NULL) return 0; 5387 5388 switch (hci_connection->address_type){ 5389 case BD_ADDR_TYPE_LE_PUBLIC: 5390 case BD_ADDR_TYPE_LE_RANDOM: 5391 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5392 return hci_connection->sm_connection.sm_connection_authenticated; 5393 #ifdef ENABLE_CLASSIC 5394 case BD_ADDR_TYPE_SCO: 5395 case BD_ADDR_TYPE_ACL: 5396 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5397 #endif 5398 default: 5399 return 0; 5400 } 5401 } 5402 5403 int gap_secure_connection(hci_con_handle_t con_handle){ 5404 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5405 if (hci_connection == NULL) return 0; 5406 5407 switch (hci_connection->address_type){ 5408 case BD_ADDR_TYPE_LE_PUBLIC: 5409 case BD_ADDR_TYPE_LE_RANDOM: 5410 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5411 return hci_connection->sm_connection.sm_connection_sc; 5412 #ifdef ENABLE_CLASSIC 5413 case BD_ADDR_TYPE_SCO: 5414 case BD_ADDR_TYPE_ACL: 5415 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5416 #endif 5417 default: 5418 return 0; 5419 } 5420 } 5421 5422 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5423 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5424 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5425 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5426 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5427 return sm_conn->sm_connection_authorization_state; 5428 } 5429 #endif 5430 5431 #ifdef ENABLE_CLASSIC 5432 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){ 5433 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5434 if (!conn) return GAP_CONNECTION_INVALID; 5435 conn->sniff_min_interval = sniff_min_interval; 5436 conn->sniff_max_interval = sniff_max_interval; 5437 conn->sniff_attempt = sniff_attempt; 5438 conn->sniff_timeout = sniff_timeout; 5439 hci_run(); 5440 return 0; 5441 } 5442 5443 /** 5444 * @brief Exit Sniff mode 5445 * @param con_handle 5446 @ @return 0 if ok 5447 */ 5448 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5449 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5450 if (!conn) return GAP_CONNECTION_INVALID; 5451 conn->sniff_min_interval = 0xffff; 5452 hci_run(); 5453 return 0; 5454 } 5455 #endif 5456 5457 void hci_halting_defer(void){ 5458 if (hci_stack->state != HCI_STATE_HALTING) return; 5459 switch (hci_stack->substate){ 5460 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5461 case HCI_HALTING_CLOSE: 5462 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5463 break; 5464 default: 5465 break; 5466 } 5467 } 5468 5469 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5470 void hci_setup_test_connections_fuzz(void){ 5471 hci_connection_t * conn; 5472 5473 // default address: 66:55:44:33:00:01 5474 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5475 5476 // setup Controller info 5477 hci_stack->num_cmd_packets = 255; 5478 hci_stack->acl_packets_total_num = 255; 5479 5480 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5481 addr[5] = 0x01; 5482 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5483 conn->con_handle = addr[5]; 5484 conn->role = HCI_ROLE_SLAVE; 5485 conn->state = RECEIVED_CONNECTION_REQUEST; 5486 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5487 5488 // setup incoming Classic SCO connection with con handle 0x0002 5489 addr[5] = 0x02; 5490 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5491 conn->con_handle = addr[5]; 5492 conn->role = HCI_ROLE_SLAVE; 5493 conn->state = RECEIVED_CONNECTION_REQUEST; 5494 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5495 5496 // setup ready Classic ACL connection with con handle 0x0003 5497 addr[5] = 0x03; 5498 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5499 conn->con_handle = addr[5]; 5500 conn->role = HCI_ROLE_SLAVE; 5501 conn->state = OPEN; 5502 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5503 5504 // setup ready Classic SCO connection with con handle 0x0004 5505 addr[5] = 0x04; 5506 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5507 conn->con_handle = addr[5]; 5508 conn->role = HCI_ROLE_SLAVE; 5509 conn->state = OPEN; 5510 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5511 5512 // setup ready LE ACL connection with con handle 0x005 and public address 5513 addr[5] = 0x05; 5514 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5515 conn->con_handle = addr[5]; 5516 conn->role = HCI_ROLE_SLAVE; 5517 conn->state = OPEN; 5518 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5519 } 5520 5521 void hci_free_connections_fuzz(void){ 5522 btstack_linked_list_iterator_t it; 5523 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5524 while (btstack_linked_list_iterator_has_next(&it)){ 5525 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5526 btstack_linked_list_iterator_remove(&it); 5527 btstack_memory_hci_connection_free(con); 5528 } 5529 } 5530 void hci_simulate_working_fuzz(void){ 5531 hci_init_done(); 5532 hci_stack->num_cmd_packets = 255; 5533 } 5534 #endif 5535