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