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 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_CLASSIC 158 static int hci_have_usb_transport(void); 159 #endif 160 161 #ifdef ENABLE_BLE 162 #ifdef ENABLE_LE_CENTRAL 163 // called from test/ble_client/advertising_data_parser.c 164 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 165 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 166 static hci_connection_t * gap_get_outgoing_connection(void); 167 #endif 168 #endif 169 170 // the STACK is here 171 #ifndef HAVE_MALLOC 172 static hci_stack_t hci_stack_static; 173 #endif 174 static hci_stack_t * hci_stack = NULL; 175 176 #ifdef ENABLE_CLASSIC 177 // default name 178 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 179 180 // test helper 181 static uint8_t disable_l2cap_timeouts = 0; 182 #endif 183 184 /** 185 * create connection for given address 186 * 187 * @return connection OR NULL, if no memory left 188 */ 189 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 190 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 191 hci_connection_t * conn = btstack_memory_hci_connection_get(); 192 if (!conn) return NULL; 193 bd_addr_copy(conn->address, addr); 194 conn->address_type = addr_type; 195 conn->con_handle = 0xffff; 196 conn->authentication_flags = AUTH_FLAGS_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 201 btstack_run_loop_set_timer_context(&conn->timeout, conn); 202 hci_connection_timestamp(conn); 203 #endif 204 conn->acl_recombination_length = 0; 205 conn->acl_recombination_pos = 0; 206 conn->num_packets_sent = 0; 207 208 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 209 #ifdef ENABLE_BLE 210 conn->le_phy_update_all_phys = 0xff; 211 #endif 212 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 213 return conn; 214 } 215 216 217 /** 218 * get le connection parameter range 219 * 220 * @return le connection parameter range struct 221 */ 222 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 223 *range = hci_stack->le_connection_parameter_range; 224 } 225 226 /** 227 * set le connection parameter range 228 * 229 */ 230 231 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 232 hci_stack->le_connection_parameter_range = *range; 233 } 234 235 /** 236 * @brief Test if connection parameters are inside in existing rage 237 * @param conn_interval_min (unit: 1.25ms) 238 * @param conn_interval_max (unit: 1.25ms) 239 * @param conn_latency 240 * @param supervision_timeout (unit: 10ms) 241 * @returns 1 if included 242 */ 243 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){ 244 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 245 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 246 247 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 248 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 249 250 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 251 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 252 253 return 1; 254 } 255 256 /** 257 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 258 * @note: default: 1 259 * @param max_peripheral_connections 260 */ 261 #ifdef ENABLE_LE_PERIPHERAL 262 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 263 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 264 } 265 #endif 266 267 /** 268 * get hci connections iterator 269 * 270 * @return hci connections iterator 271 */ 272 273 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 274 btstack_linked_list_iterator_init(it, &hci_stack->connections); 275 } 276 277 /** 278 * get connection for a given handle 279 * 280 * @return connection OR NULL, if not found 281 */ 282 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 283 btstack_linked_list_iterator_t it; 284 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 285 while (btstack_linked_list_iterator_has_next(&it)){ 286 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 287 if ( item->con_handle == con_handle ) { 288 return item; 289 } 290 } 291 return NULL; 292 } 293 294 /** 295 * get connection for given address 296 * 297 * @return connection OR NULL, if not found 298 */ 299 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 300 btstack_linked_list_iterator_t it; 301 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 302 while (btstack_linked_list_iterator_has_next(&it)){ 303 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 304 if (connection->address_type != addr_type) continue; 305 if (memcmp(addr, connection->address, 6) != 0) continue; 306 return connection; 307 } 308 return NULL; 309 } 310 311 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 312 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 313 } 314 315 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 316 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 317 } 318 319 #ifdef ENABLE_CLASSIC 320 321 #ifdef ENABLE_SCO_OVER_HCI 322 static int hci_number_sco_connections(void){ 323 int connections = 0; 324 btstack_linked_list_iterator_t it; 325 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 326 while (btstack_linked_list_iterator_has_next(&it)){ 327 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 328 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 329 connections++; 330 } 331 return connections; 332 } 333 #endif 334 335 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 337 #ifdef HAVE_EMBEDDED_TICK 338 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 339 // connections might be timed out 340 hci_emit_l2cap_check_timeout(connection); 341 } 342 #else 343 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 344 // connections might be timed out 345 hci_emit_l2cap_check_timeout(connection); 346 } 347 #endif 348 } 349 350 static void hci_connection_timestamp(hci_connection_t *connection){ 351 #ifdef HAVE_EMBEDDED_TICK 352 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 353 #else 354 connection->timestamp = btstack_run_loop_get_time_ms(); 355 #endif 356 } 357 358 /** 359 * add authentication flags and reset timer 360 * @note: assumes classic connection 361 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 362 */ 363 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 364 bd_addr_t addr; 365 reverse_bd_addr(bd_addr, addr); 366 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 367 if (conn) { 368 connectionSetAuthenticationFlags(conn, flags); 369 hci_connection_timestamp(conn); 370 } 371 } 372 373 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 374 hci_connection_t * conn = hci_connection_for_handle(handle); 375 if (!conn) return 0; 376 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 377 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 378 return 0; 379 } 380 381 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 382 if (!hci_stack->link_key_db) return; 383 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 384 hci_stack->link_key_db->delete_link_key(addr); 385 } 386 387 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 390 hci_stack->link_key_db->put_link_key(addr, link_key, type); 391 } 392 393 void gap_delete_all_link_keys(void){ 394 bd_addr_t addr; 395 link_key_t link_key; 396 link_key_type_t type; 397 btstack_link_key_iterator_t it; 398 int ok = gap_link_key_iterator_init(&it); 399 if (!ok) { 400 log_error("could not initialize iterator"); 401 return; 402 } 403 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 404 gap_drop_link_key_for_bd_addr(addr); 405 } 406 gap_link_key_iterator_done(&it); 407 } 408 409 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 410 if (!hci_stack->link_key_db) return 0; 411 if (!hci_stack->link_key_db->iterator_init) return 0; 412 return hci_stack->link_key_db->iterator_init(it); 413 } 414 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){ 415 if (!hci_stack->link_key_db) return 0; 416 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 417 } 418 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 419 if (!hci_stack->link_key_db) return; 420 hci_stack->link_key_db->iterator_done(it); 421 } 422 #endif 423 424 static int hci_is_le_connection(hci_connection_t * connection){ 425 switch (connection->address_type){ 426 case BD_ADDR_TYPE_LE_PUBLIC: 427 case BD_ADDR_TYPE_LE_RANDOM: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 429 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 430 return 1; 431 default: 432 return 0; 433 } 434 } 435 436 /** 437 * count connections 438 */ 439 static int nr_hci_connections(void){ 440 int count = 0; 441 btstack_linked_item_t *it; 442 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 443 count++; 444 } 445 return count; 446 } 447 448 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 449 450 unsigned int num_packets_sent_classic = 0; 451 unsigned int num_packets_sent_le = 0; 452 453 btstack_linked_item_t *it; 454 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 455 hci_connection_t * connection = (hci_connection_t *) it; 456 if (hci_is_le_connection(connection)){ 457 num_packets_sent_le += connection->num_packets_sent; 458 } 459 if (connection->address_type == BD_ADDR_TYPE_ACL){ 460 num_packets_sent_classic += connection->num_packets_sent; 461 } 462 } 463 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 464 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 465 int free_slots_le = 0; 466 467 if (free_slots_classic < 0){ 468 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); 469 return 0; 470 } 471 472 if (hci_stack->le_acl_packets_total_num){ 473 // if we have LE slots, they are used 474 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 475 if (free_slots_le < 0){ 476 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); 477 return 0; 478 } 479 } else { 480 // otherwise, classic slots are used for LE, too 481 free_slots_classic -= num_packets_sent_le; 482 if (free_slots_classic < 0){ 483 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); 484 return 0; 485 } 486 } 487 488 switch (address_type){ 489 case BD_ADDR_TYPE_UNKNOWN: 490 log_error("hci_number_free_acl_slots: unknown address type"); 491 return 0; 492 493 case BD_ADDR_TYPE_ACL: 494 return free_slots_classic; 495 496 default: 497 if (hci_stack->le_acl_packets_total_num){ 498 return free_slots_le; 499 } 500 return free_slots_classic; 501 } 502 } 503 504 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 505 // get connection type 506 hci_connection_t * connection = hci_connection_for_handle(con_handle); 507 if (!connection){ 508 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 509 return 0; 510 } 511 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 512 } 513 514 #ifdef ENABLE_CLASSIC 515 static int hci_number_free_sco_slots(void){ 516 unsigned int num_sco_packets_sent = 0; 517 btstack_linked_item_t *it; 518 if (hci_stack->synchronous_flow_control_enabled){ 519 // explicit flow control 520 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 521 hci_connection_t * connection = (hci_connection_t *) it; 522 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 523 num_sco_packets_sent += connection->num_packets_sent; 524 } 525 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 526 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 527 return 0; 528 } 529 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 530 } else { 531 // implicit flow control -- TODO 532 int num_ready = 0; 533 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 534 hci_connection_t * connection = (hci_connection_t *) it; 535 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 536 if (connection->sco_tx_ready == 0) continue; 537 num_ready++; 538 } 539 return num_ready; 540 } 541 } 542 #endif 543 544 // only used to send HCI Host Number Completed Packets 545 static int hci_can_send_comand_packet_transport(void){ 546 if (hci_stack->hci_packet_buffer_reserved) return 0; 547 548 // check for async hci transport implementations 549 if (hci_stack->hci_transport->can_send_packet_now){ 550 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 551 return 0; 552 } 553 } 554 return 1; 555 } 556 557 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 558 int hci_can_send_command_packet_now(void){ 559 if (hci_can_send_comand_packet_transport() == 0) return 0; 560 return hci_stack->num_cmd_packets > 0; 561 } 562 563 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 564 // check for async hci transport implementations 565 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 566 return hci_stack->hci_transport->can_send_packet_now(packet_type); 567 } 568 569 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 570 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 571 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 572 } 573 574 int hci_can_send_acl_le_packet_now(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 577 } 578 579 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 580 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 581 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 582 } 583 584 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 585 if (hci_stack->hci_packet_buffer_reserved) return 0; 586 return hci_can_send_prepared_acl_packet_now(con_handle); 587 } 588 589 #ifdef ENABLE_CLASSIC 590 int hci_can_send_acl_classic_packet_now(void){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 593 } 594 595 int hci_can_send_prepared_sco_packet_now(void){ 596 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 597 if (hci_have_usb_transport()){ 598 return hci_stack->sco_can_send_now; 599 } else { 600 return hci_number_free_sco_slots() > 0; 601 } 602 } 603 604 int hci_can_send_sco_packet_now(void){ 605 if (hci_stack->hci_packet_buffer_reserved) return 0; 606 return hci_can_send_prepared_sco_packet_now(); 607 } 608 609 void hci_request_sco_can_send_now_event(void){ 610 hci_stack->sco_waiting_for_can_send_now = 1; 611 hci_notify_if_sco_can_send_now(); 612 } 613 #endif 614 615 // used for internal checks in l2cap.c 616 int hci_is_packet_buffer_reserved(void){ 617 return hci_stack->hci_packet_buffer_reserved; 618 } 619 620 // reserves outgoing packet buffer. @returns 1 if successful 621 int hci_reserve_packet_buffer(void){ 622 if (hci_stack->hci_packet_buffer_reserved) { 623 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 624 return 0; 625 } 626 hci_stack->hci_packet_buffer_reserved = 1; 627 return 1; 628 } 629 630 void hci_release_packet_buffer(void){ 631 hci_stack->hci_packet_buffer_reserved = 0; 632 } 633 634 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 635 static int hci_transport_synchronous(void){ 636 return hci_stack->hci_transport->can_send_packet_now == NULL; 637 } 638 639 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 640 641 // 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); 642 643 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 644 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 645 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 646 max_acl_data_packet_length = hci_stack->le_data_packets_length; 647 } 648 649 // testing: reduce buffer to minimum 650 // max_acl_data_packet_length = 52; 651 652 log_debug("hci_send_acl_packet_fragments entered"); 653 654 int err; 655 // multiple packets could be send on a synchronous HCI transport 656 while (true){ 657 658 log_debug("hci_send_acl_packet_fragments loop entered"); 659 660 // get current data 661 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 662 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 663 int more_fragments = 0; 664 665 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 666 if (current_acl_data_packet_length > max_acl_data_packet_length){ 667 more_fragments = 1; 668 current_acl_data_packet_length = max_acl_data_packet_length; 669 } 670 671 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 672 if (acl_header_pos > 0){ 673 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 674 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 675 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 676 } 677 678 // update header len 679 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 680 681 // count packet 682 connection->num_packets_sent++; 683 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 684 685 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 686 if (more_fragments){ 687 // update start of next fragment to send 688 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 689 } else { 690 // done 691 hci_stack->acl_fragmentation_pos = 0; 692 hci_stack->acl_fragmentation_total_size = 0; 693 } 694 695 // send packet 696 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 697 const int size = current_acl_data_packet_length + 4; 698 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 699 hci_stack->acl_fragmentation_tx_active = 1; 700 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 701 702 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 703 704 // done yet? 705 if (!more_fragments) break; 706 707 // can send more? 708 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 709 } 710 711 log_debug("hci_send_acl_packet_fragments loop over"); 712 713 // release buffer now for synchronous transport 714 if (hci_transport_synchronous()){ 715 hci_stack->acl_fragmentation_tx_active = 0; 716 hci_release_packet_buffer(); 717 hci_emit_transport_packet_sent(); 718 } 719 720 return err; 721 } 722 723 // pre: caller has reserved the packet buffer 724 int hci_send_acl_packet_buffer(int size){ 725 726 // log_info("hci_send_acl_packet_buffer size %u", size); 727 728 if (!hci_stack->hci_packet_buffer_reserved) { 729 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 730 return 0; 731 } 732 733 uint8_t * packet = hci_stack->hci_packet_buffer; 734 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 735 736 // check for free places on Bluetooth module 737 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 738 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 739 hci_release_packet_buffer(); 740 hci_emit_transport_packet_sent(); 741 return BTSTACK_ACL_BUFFERS_FULL; 742 } 743 744 hci_connection_t *connection = hci_connection_for_handle( con_handle); 745 if (!connection) { 746 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 747 hci_release_packet_buffer(); 748 hci_emit_transport_packet_sent(); 749 return 0; 750 } 751 752 #ifdef ENABLE_CLASSIC 753 hci_connection_timestamp(connection); 754 #endif 755 756 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 757 758 // setup data 759 hci_stack->acl_fragmentation_total_size = size; 760 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 761 762 return hci_send_acl_packet_fragments(connection); 763 } 764 765 #ifdef ENABLE_CLASSIC 766 // pre: caller has reserved the packet buffer 767 int hci_send_sco_packet_buffer(int size){ 768 769 // log_info("hci_send_acl_packet_buffer size %u", size); 770 771 if (!hci_stack->hci_packet_buffer_reserved) { 772 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 773 return 0; 774 } 775 776 uint8_t * packet = hci_stack->hci_packet_buffer; 777 778 // skip checks in loopback mode 779 if (!hci_stack->loopback_mode){ 780 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 781 782 // check for free places on Bluetooth module 783 if (!hci_can_send_prepared_sco_packet_now()) { 784 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 785 hci_release_packet_buffer(); 786 hci_emit_transport_packet_sent(); 787 return BTSTACK_ACL_BUFFERS_FULL; 788 } 789 790 // track send packet in connection struct 791 hci_connection_t *connection = hci_connection_for_handle( con_handle); 792 if (!connection) { 793 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return 0; 797 } 798 799 if (hci_have_usb_transport()){ 800 // token used 801 hci_stack->sco_can_send_now = 0; 802 } else { 803 if (hci_stack->synchronous_flow_control_enabled){ 804 connection->num_packets_sent++; 805 } else { 806 connection->sco_tx_ready--; 807 } 808 } 809 } 810 811 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 812 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 813 814 if (hci_transport_synchronous()){ 815 hci_release_packet_buffer(); 816 hci_emit_transport_packet_sent(); 817 } 818 819 return err; 820 } 821 #endif 822 823 static void acl_handler(uint8_t *packet, int size){ 824 825 // log_info("acl_handler: size %u", size); 826 827 // get info 828 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 829 hci_connection_t *conn = hci_connection_for_handle(con_handle); 830 uint8_t acl_flags = READ_ACL_FLAGS(packet); 831 uint16_t acl_length = READ_ACL_LENGTH(packet); 832 833 // ignore non-registered handle 834 if (!conn){ 835 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 836 return; 837 } 838 839 // assert packet is complete 840 if ((acl_length + 4) != size){ 841 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 842 return; 843 } 844 845 #ifdef ENABLE_CLASSIC 846 // update idle timestamp 847 hci_connection_timestamp(conn); 848 #endif 849 850 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 851 hci_stack->host_completed_packets = 1; 852 conn->num_packets_completed++; 853 #endif 854 855 // handle different packet types 856 switch (acl_flags & 0x03) { 857 858 case 0x01: // continuation fragment 859 860 // sanity checks 861 if (conn->acl_recombination_pos == 0) { 862 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 863 return; 864 } 865 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 866 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 867 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 868 conn->acl_recombination_pos = 0; 869 return; 870 } 871 872 // append fragment payload (header already stored) 873 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 874 &packet[4], acl_length); 875 conn->acl_recombination_pos += acl_length; 876 877 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 878 // conn->acl_recombination_pos, conn->acl_recombination_length); 879 880 // forward complete L2CAP packet if complete. 881 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 882 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 883 // reset recombination buffer 884 conn->acl_recombination_length = 0; 885 conn->acl_recombination_pos = 0; 886 } 887 break; 888 889 case 0x02: { // first fragment 890 891 // sanity check 892 if (conn->acl_recombination_pos) { 893 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 894 conn->acl_recombination_pos = 0; 895 } 896 897 // peek into L2CAP packet! 898 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 899 900 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 901 902 // compare fragment size to L2CAP packet size 903 if (acl_length >= (l2cap_length + 4)){ 904 // forward fragment as L2CAP packet 905 hci_emit_acl_packet(packet, acl_length + 4); 906 } else { 907 908 if (acl_length > HCI_ACL_BUFFER_SIZE){ 909 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 910 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 911 return; 912 } 913 914 // store first fragment and tweak acl length for complete package 915 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 916 packet, acl_length + 4); 917 conn->acl_recombination_pos = acl_length + 4; 918 conn->acl_recombination_length = l2cap_length; 919 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 920 } 921 break; 922 923 } 924 default: 925 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 926 return; 927 } 928 929 // execute main loop 930 hci_run(); 931 } 932 933 static void hci_shutdown_connection(hci_connection_t *conn){ 934 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 935 936 #ifdef ENABLE_CLASSIC 937 #ifdef ENABLE_SCO_OVER_HCI 938 int addr_type = conn->address_type; 939 #endif 940 #endif 941 942 btstack_run_loop_remove_timer(&conn->timeout); 943 944 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 945 btstack_memory_hci_connection_free( conn ); 946 947 // now it's gone 948 hci_emit_nr_connections_changed(); 949 950 #ifdef ENABLE_CLASSIC 951 #ifdef ENABLE_SCO_OVER_HCI 952 // update SCO 953 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 954 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 955 } 956 #endif 957 #endif 958 } 959 960 #ifdef ENABLE_CLASSIC 961 962 static const uint16_t packet_type_sizes[] = { 963 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 964 HCI_ACL_DH1_SIZE, 0, 0, 0, 965 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 966 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 967 }; 968 static const uint8_t packet_type_feature_requirement_bit[] = { 969 0, // 3 slot packets 970 1, // 5 slot packets 971 25, // EDR 2 mpbs 972 26, // EDR 3 mbps 973 39, // 3 slot EDR packts 974 40, // 5 slot EDR packet 975 }; 976 static const uint16_t packet_type_feature_packet_mask[] = { 977 0x0f00, // 3 slot packets 978 0xf000, // 5 slot packets 979 0x1102, // EDR 2 mpbs 980 0x2204, // EDR 3 mbps 981 0x0300, // 3 slot EDR packts 982 0x3000, // 5 slot EDR packet 983 }; 984 985 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 986 // enable packet types based on size 987 uint16_t packet_types = 0; 988 unsigned int i; 989 for (i=0;i<16;i++){ 990 if (packet_type_sizes[i] == 0) continue; 991 if (packet_type_sizes[i] <= buffer_size){ 992 packet_types |= 1 << i; 993 } 994 } 995 // disable packet types due to missing local supported features 996 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 997 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 998 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 999 if (feature_set) continue; 1000 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1001 packet_types &= ~packet_type_feature_packet_mask[i]; 1002 } 1003 // flip bits for "may not be used" 1004 packet_types ^= 0x3306; 1005 return packet_types; 1006 } 1007 1008 uint16_t hci_usable_acl_packet_types(void){ 1009 return hci_stack->packet_types; 1010 } 1011 #endif 1012 1013 uint8_t* hci_get_outgoing_packet_buffer(void){ 1014 // hci packet buffer is >= acl data packet length 1015 return hci_stack->hci_packet_buffer; 1016 } 1017 1018 uint16_t hci_max_acl_data_packet_length(void){ 1019 return hci_stack->acl_data_packet_length; 1020 } 1021 1022 #ifdef ENABLE_CLASSIC 1023 int hci_extended_sco_link_supported(void){ 1024 // No. 31, byte 3, bit 7 1025 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1026 } 1027 #endif 1028 1029 int hci_non_flushable_packet_boundary_flag_supported(void){ 1030 // No. 54, byte 6, bit 6 1031 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1032 } 1033 1034 static int gap_ssp_supported(void){ 1035 // No. 51, byte 6, bit 3 1036 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1037 } 1038 1039 static int hci_classic_supported(void){ 1040 #ifdef ENABLE_CLASSIC 1041 // No. 37, byte 4, bit 5, = No BR/EDR Support 1042 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1043 #else 1044 return 0; 1045 #endif 1046 } 1047 1048 static int hci_le_supported(void){ 1049 #ifdef ENABLE_BLE 1050 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1051 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 #ifdef ENABLE_BLE 1058 1059 /** 1060 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1061 */ 1062 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1063 *addr_type = hci_stack->le_own_addr_type; 1064 if (hci_stack->le_own_addr_type){ 1065 (void)memcpy(addr, hci_stack->le_random_address, 6); 1066 } else { 1067 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1068 } 1069 } 1070 1071 #ifdef ENABLE_LE_CENTRAL 1072 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1073 1074 int offset = 3; 1075 int num_reports = packet[offset]; 1076 offset += 1; 1077 1078 int i; 1079 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1080 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1081 for (i=0; (i<num_reports) && (offset < size);i++){ 1082 // sanity checks on data_length: 1083 uint8_t data_length = packet[offset + 8]; 1084 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1085 if ((offset + 9 + data_length + 1) > size) return; 1086 // setup event 1087 uint8_t event_size = 10 + data_length; 1088 int pos = 0; 1089 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1090 event[pos++] = event_size; 1091 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1092 offset += 8; 1093 pos += 8; 1094 event[pos++] = packet[offset + 1 + data_length]; // rssi 1095 event[pos++] = data_length; 1096 offset++; 1097 (void)memcpy(&event[pos], &packet[offset], data_length); 1098 pos += data_length; 1099 offset += data_length + 1; // rssi 1100 hci_emit_event(event, pos, 1); 1101 } 1102 } 1103 #endif 1104 #endif 1105 1106 #ifdef ENABLE_BLE 1107 #ifdef ENABLE_LE_PERIPHERAL 1108 static void hci_reenable_advertisements_if_needed(void){ 1109 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1110 // get number of active le slave connections 1111 int num_slave_connections = 0; 1112 btstack_linked_list_iterator_t it; 1113 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1114 while (btstack_linked_list_iterator_has_next(&it)){ 1115 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1116 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1117 if (con->state != OPEN) continue; 1118 if (con->role != HCI_ROLE_SLAVE) continue; 1119 if (!hci_is_le_connection(con)) continue; 1120 num_slave_connections++; 1121 } 1122 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1123 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1124 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1125 } 1126 } 1127 } 1128 #endif 1129 #endif 1130 1131 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1132 1133 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1134 if (!hci_stack->config) return 0; 1135 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1136 // Limit baud rate for Broadcom chipsets to 3 mbps 1137 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1138 baud_rate = 3000000; 1139 } 1140 return baud_rate; 1141 } 1142 1143 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1144 UNUSED(ds); 1145 1146 switch (hci_stack->substate){ 1147 case HCI_INIT_W4_SEND_RESET: 1148 log_info("Resend HCI Reset"); 1149 hci_stack->substate = HCI_INIT_SEND_RESET; 1150 hci_stack->num_cmd_packets = 1; 1151 hci_run(); 1152 break; 1153 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1154 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1155 if (hci_stack->hci_transport->reset_link){ 1156 hci_stack->hci_transport->reset_link(); 1157 } 1158 1159 /* fall through */ 1160 1161 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1162 log_info("Resend HCI Reset - CSR Warm Boot"); 1163 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1164 hci_stack->num_cmd_packets = 1; 1165 hci_run(); 1166 break; 1167 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1168 if (hci_stack->hci_transport->set_baudrate){ 1169 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1170 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1171 hci_stack->hci_transport->set_baudrate(baud_rate); 1172 } 1173 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1174 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1175 if (hci_stack->hci_transport->reset_link){ 1176 log_info("Link Reset"); 1177 hci_stack->hci_transport->reset_link(); 1178 } 1179 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1180 hci_run(); 1181 } 1182 break; 1183 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1184 // otherwise continue 1185 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1186 hci_send_cmd(&hci_read_local_supported_commands); 1187 break; 1188 default: 1189 break; 1190 } 1191 } 1192 #endif 1193 1194 static void hci_initializing_next_state(void){ 1195 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1196 } 1197 1198 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1199 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1200 const int bd_addr_string_len = 17; 1201 int i = 0; 1202 while (i < (size - bd_addr_string_len)){ 1203 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1204 i++; 1205 continue; 1206 } 1207 // set real address 1208 (void)memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), 1209 bd_addr_string_len); 1210 i += bd_addr_string_len; 1211 } 1212 } 1213 #endif 1214 1215 // assumption: hci_can_send_command_packet_now() == true 1216 static void hci_initializing_run(void){ 1217 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1218 switch (hci_stack->substate){ 1219 case HCI_INIT_SEND_RESET: 1220 hci_state_reset(); 1221 1222 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1223 // prepare reset if command complete not received in 100ms 1224 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1225 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1226 btstack_run_loop_add_timer(&hci_stack->timeout); 1227 #endif 1228 // send command 1229 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1230 hci_send_cmd(&hci_reset); 1231 break; 1232 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1233 hci_send_cmd(&hci_read_local_version_information); 1234 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1235 break; 1236 case HCI_INIT_SEND_READ_LOCAL_NAME: 1237 hci_send_cmd(&hci_read_local_name); 1238 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1239 break; 1240 1241 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1242 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1243 hci_state_reset(); 1244 // prepare reset if command complete not received in 100ms 1245 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1246 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1247 btstack_run_loop_add_timer(&hci_stack->timeout); 1248 // send command 1249 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1250 hci_send_cmd(&hci_reset); 1251 break; 1252 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1253 hci_state_reset(); 1254 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1255 hci_send_cmd(&hci_reset); 1256 break; 1257 case HCI_INIT_SEND_BAUD_CHANGE: { 1258 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1259 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1260 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1261 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1262 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1263 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1264 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1265 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1266 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1267 btstack_run_loop_add_timer(&hci_stack->timeout); 1268 } 1269 break; 1270 } 1271 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1272 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1273 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1274 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1275 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1276 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1277 break; 1278 } 1279 case HCI_INIT_CUSTOM_INIT: 1280 // Custom initialization 1281 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1282 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1283 int send_cmd = 0; 1284 switch (hci_stack->chipset_result){ 1285 case BTSTACK_CHIPSET_VALID_COMMAND: 1286 send_cmd = 1; 1287 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1288 break; 1289 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1290 send_cmd = 1; 1291 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1292 log_info("CSR Warm Boot"); 1293 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1294 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1295 btstack_run_loop_add_timer(&hci_stack->timeout); 1296 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1297 && hci_stack->config 1298 && hci_stack->chipset 1299 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1300 && hci_stack->hci_transport->set_baudrate 1301 && hci_transport_uart_get_main_baud_rate()){ 1302 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1303 } else { 1304 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1305 } 1306 break; 1307 default: 1308 break; 1309 } 1310 1311 if (send_cmd){ 1312 int size = 3 + hci_stack->hci_packet_buffer[2]; 1313 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1314 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1315 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1316 break; 1317 } 1318 log_info("Init script done"); 1319 1320 // Init script download on Broadcom chipsets causes: 1321 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1322 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1323 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1324 1325 // - baud rate to reset, restore UART baud rate if needed 1326 int need_baud_change = hci_stack->config 1327 && hci_stack->chipset 1328 && hci_stack->chipset->set_baudrate_command 1329 && hci_stack->hci_transport->set_baudrate 1330 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1331 if (need_baud_change) { 1332 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1333 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1334 hci_stack->hci_transport->set_baudrate(baud_rate); 1335 } 1336 1337 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1338 // -> Work around: wait a few milliseconds here. 1339 log_info("BCM delay after init script"); 1340 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1341 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1342 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1343 btstack_run_loop_add_timer(&hci_stack->timeout); 1344 break; 1345 } 1346 } 1347 // otherwise continue 1348 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1349 hci_send_cmd(&hci_read_local_supported_commands); 1350 break; 1351 case HCI_INIT_SET_BD_ADDR: 1352 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1353 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1354 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1355 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1356 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1357 break; 1358 #endif 1359 1360 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1361 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1362 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1363 hci_send_cmd(&hci_read_local_supported_commands); 1364 break; 1365 case HCI_INIT_READ_BD_ADDR: 1366 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1367 hci_send_cmd(&hci_read_bd_addr); 1368 break; 1369 case HCI_INIT_READ_BUFFER_SIZE: 1370 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1371 hci_send_cmd(&hci_read_buffer_size); 1372 break; 1373 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1375 hci_send_cmd(&hci_read_local_supported_features); 1376 break; 1377 1378 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1379 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1380 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1381 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1382 break; 1383 case HCI_INIT_HOST_BUFFER_SIZE: 1384 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1385 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1386 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1387 break; 1388 #endif 1389 1390 case HCI_INIT_SET_EVENT_MASK: 1391 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1392 if (hci_le_supported()){ 1393 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1394 } else { 1395 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1396 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1397 } 1398 break; 1399 1400 #ifdef ENABLE_CLASSIC 1401 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1403 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1404 break; 1405 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1407 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1408 break; 1409 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1410 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1411 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1412 break; 1413 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1414 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1415 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1416 break; 1417 case HCI_INIT_WRITE_LOCAL_NAME: { 1418 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1419 hci_reserve_packet_buffer(); 1420 uint8_t * packet = hci_stack->hci_packet_buffer; 1421 // construct HCI Command and send 1422 uint16_t opcode = hci_write_local_name.opcode; 1423 hci_stack->last_cmd_opcode = opcode; 1424 packet[0] = opcode & 0xff; 1425 packet[1] = opcode >> 8; 1426 packet[2] = DEVICE_NAME_LEN; 1427 memset(&packet[3], 0, DEVICE_NAME_LEN); 1428 (void)memcpy(&packet[3], hci_stack->local_name, 1429 strlen(hci_stack->local_name)); 1430 // expand '00:00:00:00:00:00' in name with bd_addr 1431 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1432 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1433 break; 1434 } 1435 case HCI_INIT_WRITE_EIR_DATA: { 1436 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1437 hci_reserve_packet_buffer(); 1438 uint8_t * packet = hci_stack->hci_packet_buffer; 1439 // construct HCI Command and send 1440 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1441 hci_stack->last_cmd_opcode = opcode; 1442 packet[0] = opcode & 0xff; 1443 packet[1] = opcode >> 8; 1444 packet[2] = 1 + 240; 1445 packet[3] = 0; // FEC not required 1446 if (hci_stack->eir_data){ 1447 (void)memcpy(&packet[4], hci_stack->eir_data, 240); 1448 } else { 1449 memset(&packet[4], 0, 240); 1450 int name_len = strlen(hci_stack->local_name); 1451 packet[4] = name_len + 1; 1452 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1453 (void)memcpy(&packet[6], hci_stack->local_name, name_len); 1454 } 1455 // expand '00:00:00:00:00:00' in name with bd_addr 1456 hci_replace_bd_addr_placeholder(&packet[4], 240); 1457 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1458 break; 1459 } 1460 case HCI_INIT_WRITE_INQUIRY_MODE: 1461 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1462 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1463 break; 1464 case HCI_INIT_WRITE_SCAN_ENABLE: 1465 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1466 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1467 break; 1468 // only sent if ENABLE_SCO_OVER_HCI is defined 1469 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1470 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1471 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1472 break; 1473 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1474 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1475 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1476 break; 1477 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1478 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1479 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1480 log_info("BCM: Route SCO data via HCI transport"); 1481 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1482 break; 1483 1484 #endif 1485 #ifdef ENABLE_BLE 1486 // LE INIT 1487 case HCI_INIT_LE_READ_BUFFER_SIZE: 1488 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1489 hci_send_cmd(&hci_le_read_buffer_size); 1490 break; 1491 case HCI_INIT_LE_SET_EVENT_MASK: 1492 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1493 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1494 break; 1495 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1496 // LE Supported Host = 1, Simultaneous Host = 0 1497 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1498 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1499 break; 1500 #endif 1501 1502 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1503 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1504 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1505 hci_send_cmd(&hci_le_read_maximum_data_length); 1506 break; 1507 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1508 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1509 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1510 break; 1511 #endif 1512 1513 #ifdef ENABLE_LE_CENTRAL 1514 case HCI_INIT_READ_WHITE_LIST_SIZE: 1515 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1516 hci_send_cmd(&hci_le_read_white_list_size); 1517 break; 1518 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1519 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1520 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1521 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); 1522 break; 1523 #endif 1524 default: 1525 return; 1526 } 1527 } 1528 1529 static void hci_init_done(void){ 1530 // done. tell the app 1531 log_info("hci_init_done -> HCI_STATE_WORKING"); 1532 hci_stack->state = HCI_STATE_WORKING; 1533 hci_emit_state(); 1534 hci_run(); 1535 } 1536 1537 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1538 1539 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1540 1541 uint8_t command_completed = 0; 1542 1543 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1544 uint16_t opcode = little_endian_read_16(packet,3); 1545 if (opcode == hci_stack->last_cmd_opcode){ 1546 command_completed = 1; 1547 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1548 } else { 1549 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1550 } 1551 } 1552 1553 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1554 uint8_t status = packet[2]; 1555 uint16_t opcode = little_endian_read_16(packet,4); 1556 if (opcode == hci_stack->last_cmd_opcode){ 1557 if (status){ 1558 command_completed = 1; 1559 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1560 } else { 1561 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1562 } 1563 } else { 1564 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1565 } 1566 } 1567 1568 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1569 1570 // Vendor == CSR 1571 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1572 // TODO: track actual command 1573 command_completed = 1; 1574 } 1575 1576 // Vendor == Toshiba 1577 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1578 // TODO: track actual command 1579 command_completed = 1; 1580 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1581 hci_stack->num_cmd_packets = 1; 1582 } 1583 1584 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1585 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1586 // 1587 // HCI Reset 1588 // Timeout 100 ms 1589 // HCI Reset 1590 // Command Complete Reset 1591 // HCI Read Local Version Information 1592 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1593 // hang... 1594 // 1595 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1596 if (!command_completed 1597 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1598 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1599 1600 uint16_t opcode = little_endian_read_16(packet,3); 1601 if (opcode == hci_reset.opcode){ 1602 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1603 return; 1604 } 1605 } 1606 1607 // CSR & H5 1608 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1609 if (!command_completed 1610 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1611 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1612 1613 uint16_t opcode = little_endian_read_16(packet,3); 1614 if (opcode == hci_reset.opcode){ 1615 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1616 return; 1617 } 1618 } 1619 1620 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1621 // fix: Correct substate and behave as command below 1622 if (command_completed){ 1623 switch (hci_stack->substate){ 1624 case HCI_INIT_SEND_RESET: 1625 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1626 break; 1627 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1628 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1629 break; 1630 default: 1631 break; 1632 } 1633 } 1634 1635 #endif 1636 1637 if (!command_completed) return; 1638 1639 int need_baud_change = 0; 1640 int need_addr_change = 0; 1641 1642 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1643 need_baud_change = hci_stack->config 1644 && hci_stack->chipset 1645 && hci_stack->chipset->set_baudrate_command 1646 && hci_stack->hci_transport->set_baudrate 1647 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1648 1649 need_addr_change = hci_stack->custom_bd_addr_set 1650 && hci_stack->chipset 1651 && hci_stack->chipset->set_bd_addr_command; 1652 #endif 1653 1654 switch(hci_stack->substate){ 1655 1656 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1657 case HCI_INIT_SEND_RESET: 1658 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1659 // fix: just correct substate and behave as command below 1660 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1661 btstack_run_loop_remove_timer(&hci_stack->timeout); 1662 break; 1663 case HCI_INIT_W4_SEND_RESET: 1664 btstack_run_loop_remove_timer(&hci_stack->timeout); 1665 break; 1666 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1667 log_info("Received local name, need baud change %d", need_baud_change); 1668 if (need_baud_change){ 1669 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1670 return; 1671 } 1672 // skip baud change 1673 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1674 return; 1675 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1676 // for STLC2500D, baud rate change already happened. 1677 // for others, baud rate gets changed now 1678 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1679 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1680 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1681 hci_stack->hci_transport->set_baudrate(baud_rate); 1682 } 1683 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1684 return; 1685 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1686 btstack_run_loop_remove_timer(&hci_stack->timeout); 1687 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1688 return; 1689 case HCI_INIT_W4_CUSTOM_INIT: 1690 // repeat custom init 1691 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1692 return; 1693 #else 1694 case HCI_INIT_W4_SEND_RESET: 1695 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1696 return ; 1697 #endif 1698 1699 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1700 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1701 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1702 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1703 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1704 return; 1705 } 1706 if (need_addr_change){ 1707 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1708 return; 1709 } 1710 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1711 return; 1712 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1713 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1714 if (need_baud_change){ 1715 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1716 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1717 hci_stack->hci_transport->set_baudrate(baud_rate); 1718 } 1719 if (need_addr_change){ 1720 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1721 return; 1722 } 1723 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1724 return; 1725 case HCI_INIT_W4_SET_BD_ADDR: 1726 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1727 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1728 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1729 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1730 return; 1731 } 1732 // skipping st warm boot 1733 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1734 return; 1735 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1736 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1737 return; 1738 #endif 1739 case HCI_INIT_W4_READ_BD_ADDR: 1740 // only read buffer size if supported 1741 if (hci_stack->local_supported_commands[0] & 0x01) { 1742 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1743 return; 1744 } 1745 // skipping read buffer size 1746 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1747 return; 1748 case HCI_INIT_W4_SET_EVENT_MASK: 1749 // skip Classic init commands for LE only chipsets 1750 if (!hci_classic_supported()){ 1751 #ifdef ENABLE_BLE 1752 if (hci_le_supported()){ 1753 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1754 return; 1755 } 1756 #endif 1757 log_error("Neither BR/EDR nor LE supported"); 1758 hci_init_done(); 1759 return; 1760 } 1761 if (!gap_ssp_supported()){ 1762 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1763 return; 1764 } 1765 break; 1766 #ifdef ENABLE_BLE 1767 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1768 // skip write le host if not supported (e.g. on LE only EM9301) 1769 if (hci_stack->local_supported_commands[0] & 0x02) break; 1770 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1771 return; 1772 1773 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1774 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1775 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1776 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1777 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1778 return; 1779 } 1780 // explicit fall through to reduce repetitions 1781 1782 #ifdef ENABLE_LE_CENTRAL 1783 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1784 #else 1785 hci_init_done(); 1786 #endif 1787 return; 1788 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1789 1790 #endif /* ENABLE_BLE */ 1791 1792 #ifdef ENABLE_SCO_OVER_HCI 1793 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1794 // skip write synchronous flow control if not supported 1795 if (hci_stack->local_supported_commands[0] & 0x04) break; 1796 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1797 1798 /* fall through */ 1799 1800 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1801 // skip write default erroneous data reporting if not supported 1802 if (hci_stack->local_supported_commands[0] & 0x08) break; 1803 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1804 1805 /* fall through */ 1806 1807 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1808 // skip bcm set sco pcm config on non-Broadcom chipsets 1809 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1810 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1811 1812 /* fall through */ 1813 1814 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1815 if (!hci_le_supported()){ 1816 // SKIP LE init for Classic only configuration 1817 hci_init_done(); 1818 return; 1819 } 1820 break; 1821 1822 #else /* !ENABLE_SCO_OVER_HCI */ 1823 1824 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1825 #ifdef ENABLE_BLE 1826 if (hci_le_supported()){ 1827 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1828 return; 1829 } 1830 #endif 1831 // SKIP LE init for Classic only configuration 1832 hci_init_done(); 1833 return; 1834 #endif /* ENABLE_SCO_OVER_HCI */ 1835 1836 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1837 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1838 // Response to command before init done state -> init done 1839 case (HCI_INIT_DONE-1): 1840 hci_init_done(); 1841 return; 1842 #endif 1843 1844 default: 1845 break; 1846 } 1847 hci_initializing_next_state(); 1848 } 1849 1850 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1851 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1852 bd_addr_t bd_address; 1853 (void)memcpy(&bd_address, conn->address, 6); 1854 1855 #ifdef ENABLE_CLASSIC 1856 // cache needed data 1857 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1858 #endif 1859 1860 // connection failed, remove entry 1861 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1862 btstack_memory_hci_connection_free( conn ); 1863 1864 #ifdef ENABLE_CLASSIC 1865 // notify client if dedicated bonding 1866 if (notify_dedicated_bonding_failed){ 1867 log_info("hci notify_dedicated_bonding_failed"); 1868 hci_emit_dedicated_bonding_result(bd_address, status); 1869 } 1870 1871 // if authentication error, also delete link key 1872 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1873 gap_drop_link_key_for_bd_addr(bd_address); 1874 } 1875 #endif 1876 } 1877 1878 static void event_handler(uint8_t *packet, int size){ 1879 1880 uint16_t event_length = packet[1]; 1881 1882 // assert packet is complete 1883 if (size != (event_length + 2)){ 1884 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1885 return; 1886 } 1887 1888 bd_addr_t addr; 1889 bd_addr_type_t addr_type; 1890 hci_con_handle_t handle; 1891 hci_connection_t * conn; 1892 int i; 1893 int create_connection_cmd; 1894 1895 #ifdef ENABLE_CLASSIC 1896 uint8_t link_type; 1897 #endif 1898 1899 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1900 1901 switch (hci_event_packet_get_type(packet)) { 1902 1903 case HCI_EVENT_COMMAND_COMPLETE: 1904 // get num cmd packets - limit to 1 to reduce complexity 1905 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1906 1907 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1908 if (packet[5]) break; 1909 // terminate, name 248 chars 1910 packet[6+248] = 0; 1911 log_info("local name: %s", &packet[6]); 1912 } 1913 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1914 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1915 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1916 uint16_t acl_len = little_endian_read_16(packet, 6); 1917 uint16_t sco_len = packet[8]; 1918 1919 // determine usable ACL/SCO payload size 1920 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1921 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1922 1923 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1924 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1925 1926 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1927 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1928 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1929 } 1930 } 1931 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1932 if (packet[5] == 0){ 1933 uint8_t event[5]; 1934 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1935 event[1] = 3; 1936 (void)memcpy(&event[2], &packet[6], 3); 1937 hci_emit_event(event, sizeof(event), 1); 1938 } 1939 } 1940 #ifdef ENABLE_BLE 1941 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1942 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1943 hci_stack->le_acl_packets_total_num = packet[8]; 1944 // determine usable ACL payload size 1945 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1946 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1947 } 1948 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1949 } 1950 #endif 1951 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1952 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1953 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1954 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1955 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); 1956 } 1957 #endif 1958 #ifdef ENABLE_LE_CENTRAL 1959 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1960 hci_stack->le_whitelist_capacity = packet[6]; 1961 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1962 } 1963 #endif 1964 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1965 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1966 hci_stack->local_bd_addr); 1967 log_info("Local Address, Status: 0x%02x: Addr: %s", 1968 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1969 #ifdef ENABLE_CLASSIC 1970 if (hci_stack->link_key_db){ 1971 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1972 } 1973 #endif 1974 } 1975 #ifdef ENABLE_CLASSIC 1976 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1977 hci_emit_discoverable_enabled(hci_stack->discoverable); 1978 } 1979 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1980 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1981 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1982 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1983 hci_emit_event(event, sizeof(event), 1); 1984 } 1985 } 1986 #endif 1987 1988 // Note: HCI init checks 1989 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1990 (void)memcpy(hci_stack->local_supported_features, 1991 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1992 8); 1993 1994 #ifdef ENABLE_CLASSIC 1995 // determine usable ACL packet types based on host buffer size and supported features 1996 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1997 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1998 #endif 1999 // Classic/LE 2000 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2001 } 2002 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2003 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2004 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2005 uint16_t manufacturer = little_endian_read_16(packet, 10); 2006 // map Cypress to Broadcom 2007 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2008 log_info("Treat Cypress as Broadcom"); 2009 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2010 little_endian_store_16(packet, 10, manufacturer); 2011 } 2012 hci_stack->manufacturer = manufacturer; 2013 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2014 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2015 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2016 } 2017 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2018 hci_stack->local_supported_commands[0] = 2019 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2020 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2021 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2022 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2023 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2024 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2025 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2026 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2027 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2028 } 2029 #ifdef ENABLE_CLASSIC 2030 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2031 if (packet[5] == 0){ 2032 hci_stack->synchronous_flow_control_enabled = 1; 2033 } 2034 } 2035 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2036 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2037 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2038 conn = hci_connection_for_handle(handle); 2039 if (!conn) break; 2040 if (status == 0){ 2041 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2042 log_info("Handle %x04x key Size: %u", handle, key_size); 2043 conn->encryption_key_size = key_size; 2044 } else { 2045 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2046 conn->encryption_key_size = 1; 2047 } 2048 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2049 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2050 } 2051 #endif 2052 break; 2053 2054 case HCI_EVENT_COMMAND_STATUS: 2055 // get num cmd packets - limit to 1 to reduce complexity 2056 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2057 2058 // check command status to detected failed outgoing connections 2059 create_connection_cmd = 0; 2060 #ifdef ENABLE_CLASSIC 2061 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2062 create_connection_cmd = 1; 2063 } 2064 #endif 2065 #ifdef ENABLE_LE_CENTRAL 2066 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2067 create_connection_cmd = 1; 2068 } 2069 #endif 2070 if (create_connection_cmd) { 2071 uint8_t status = hci_event_command_status_get_status(packet); 2072 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2073 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); 2074 2075 // reset outgoing address info 2076 memset(hci_stack->outgoing_addr, 0, 6); 2077 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2078 2079 // error => outgoing connection failed 2080 if ((conn != NULL) && (status != 0)){ 2081 hci_handle_connection_failed(conn, status); 2082 } 2083 } 2084 break; 2085 2086 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2087 if (size < 3) return; 2088 uint16_t num_handles = packet[2]; 2089 if (size != (3 + num_handles * 4)) return; 2090 uint16_t offset = 3; 2091 for (i=0; i<num_handles;i++){ 2092 handle = little_endian_read_16(packet, offset) & 0x0fff; 2093 offset += 2; 2094 uint16_t num_packets = little_endian_read_16(packet, offset); 2095 offset += 2; 2096 2097 conn = hci_connection_for_handle(handle); 2098 if (!conn){ 2099 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2100 continue; 2101 } 2102 2103 if (conn->num_packets_sent >= num_packets){ 2104 conn->num_packets_sent -= num_packets; 2105 } else { 2106 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2107 conn->num_packets_sent = 0; 2108 } 2109 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2110 2111 #ifdef ENABLE_CLASSIC 2112 // For SCO, we do the can_send_now_check here 2113 hci_notify_if_sco_can_send_now(); 2114 #endif 2115 } 2116 break; 2117 } 2118 2119 #ifdef ENABLE_CLASSIC 2120 case HCI_EVENT_INQUIRY_COMPLETE: 2121 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2122 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2123 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2124 hci_emit_event(event, sizeof(event), 1); 2125 } 2126 break; 2127 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2128 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2129 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2130 } 2131 break; 2132 case HCI_EVENT_CONNECTION_REQUEST: 2133 reverse_bd_addr(&packet[2], addr); 2134 if (hci_stack->gap_classic_accept_callback != NULL){ 2135 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2136 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2137 bd_addr_copy(hci_stack->decline_addr, addr); 2138 break; 2139 } 2140 } 2141 2142 // TODO: eval COD 8-10 2143 link_type = packet[11]; 2144 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2145 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2146 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2147 if (!conn) { 2148 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2149 } 2150 if (!conn) { 2151 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2152 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2153 bd_addr_copy(hci_stack->decline_addr, addr); 2154 break; 2155 } 2156 conn->role = HCI_ROLE_SLAVE; 2157 conn->state = RECEIVED_CONNECTION_REQUEST; 2158 // store info about eSCO 2159 if (link_type == 0x02){ 2160 conn->remote_supported_feature_eSCO = 1; 2161 } 2162 hci_run(); 2163 break; 2164 2165 case HCI_EVENT_CONNECTION_COMPLETE: 2166 // Connection management 2167 reverse_bd_addr(&packet[5], addr); 2168 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2169 addr_type = BD_ADDR_TYPE_ACL; 2170 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2171 if (conn) { 2172 if (!packet[2]){ 2173 conn->state = OPEN; 2174 conn->con_handle = little_endian_read_16(packet, 3); 2175 2176 // queue get remote feature 2177 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2178 2179 // queue set supervision timeout if we're master 2180 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2181 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2182 } 2183 2184 // restart timer 2185 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2186 btstack_run_loop_add_timer(&conn->timeout); 2187 2188 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2189 2190 hci_emit_nr_connections_changed(); 2191 } else { 2192 // connection failed 2193 hci_handle_connection_failed(conn, packet[2]); 2194 } 2195 } 2196 break; 2197 2198 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2199 reverse_bd_addr(&packet[5], addr); 2200 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2201 if (packet[2]){ 2202 // connection failed 2203 break; 2204 } 2205 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2206 if (!conn) { 2207 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2208 } 2209 if (!conn) { 2210 break; 2211 } 2212 conn->state = OPEN; 2213 conn->con_handle = little_endian_read_16(packet, 3); 2214 2215 #ifdef ENABLE_SCO_OVER_HCI 2216 // update SCO 2217 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2218 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2219 } 2220 // trigger can send now 2221 if (hci_have_usb_transport()){ 2222 hci_stack->sco_can_send_now = 1; 2223 } 2224 #endif 2225 break; 2226 2227 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2228 handle = little_endian_read_16(packet, 3); 2229 conn = hci_connection_for_handle(handle); 2230 if (!conn) break; 2231 if (!packet[2]){ 2232 uint8_t * features = &packet[5]; 2233 if (features[6] & (1 << 3)){ 2234 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2235 } 2236 if (features[3] & (1<<7)){ 2237 conn->remote_supported_feature_eSCO = 1; 2238 } 2239 } 2240 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2241 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2242 if (conn->bonding_flags & BONDING_DEDICATED){ 2243 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2244 } 2245 break; 2246 2247 case HCI_EVENT_LINK_KEY_REQUEST: 2248 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2249 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2250 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2251 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2252 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2253 hci_run(); 2254 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2255 return; 2256 2257 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2258 reverse_bd_addr(&packet[2], addr); 2259 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2260 if (!conn) break; 2261 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2262 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2263 // Change Connection Encryption keeps link key type 2264 if (link_key_type != CHANGED_COMBINATION_KEY){ 2265 conn->link_key_type = link_key_type; 2266 } 2267 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2268 // still forward event to allow dismiss of pairing dialog 2269 break; 2270 } 2271 2272 case HCI_EVENT_PIN_CODE_REQUEST: 2273 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2274 // non-bondable mode: pin code negative reply will be sent 2275 if (!hci_stack->bondable){ 2276 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2277 hci_run(); 2278 return; 2279 } 2280 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2281 if (!hci_stack->link_key_db) break; 2282 hci_event_pin_code_request_get_bd_addr(packet, addr); 2283 hci_stack->link_key_db->delete_link_key(addr); 2284 break; 2285 2286 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2287 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2288 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2289 break; 2290 2291 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2292 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2293 if (!hci_stack->ssp_auto_accept) break; 2294 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2295 break; 2296 2297 case HCI_EVENT_USER_PASSKEY_REQUEST: 2298 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2299 if (!hci_stack->ssp_auto_accept) break; 2300 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2301 break; 2302 case HCI_EVENT_MODE_CHANGE: 2303 handle = hci_event_mode_change_get_handle(packet); 2304 conn = hci_connection_for_handle(handle); 2305 if (!conn) break; 2306 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2307 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2308 break; 2309 #endif 2310 2311 case HCI_EVENT_ENCRYPTION_CHANGE: 2312 handle = little_endian_read_16(packet, 3); 2313 conn = hci_connection_for_handle(handle); 2314 if (!conn) break; 2315 if (packet[2] == 0) { 2316 if (packet[5]){ 2317 if (hci_is_le_connection(conn)){ 2318 // For LE, we accept connection as encrypted 2319 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2320 } 2321 #ifdef ENABLE_CLASSIC 2322 else { 2323 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2324 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2325 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2326 } else { 2327 // if not, pretend everything is perfect 2328 conn->encryption_key_size = 16; 2329 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2330 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2331 } 2332 } 2333 #endif 2334 } else { 2335 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2336 } 2337 } 2338 2339 break; 2340 2341 #ifdef ENABLE_CLASSIC 2342 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2343 handle = little_endian_read_16(packet, 3); 2344 conn = hci_connection_for_handle(handle); 2345 if (!conn) break; 2346 2347 // dedicated bonding: send result and disconnect 2348 if (conn->bonding_flags & BONDING_DEDICATED){ 2349 conn->bonding_flags &= ~BONDING_DEDICATED; 2350 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2351 conn->bonding_status = packet[2]; 2352 break; 2353 } 2354 2355 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2356 // link key sufficient for requested security 2357 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2358 break; 2359 } 2360 // not enough 2361 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2362 break; 2363 #endif 2364 2365 // HCI_EVENT_DISCONNECTION_COMPLETE 2366 // has been split, to first notify stack before shutting connection down 2367 // see end of function, too. 2368 case HCI_EVENT_DISCONNECTION_COMPLETE: 2369 if (packet[2]) break; // status != 0 2370 handle = little_endian_read_16(packet, 3); 2371 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2372 if (hci_stack->acl_fragmentation_total_size > 0) { 2373 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2374 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2375 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2376 hci_stack->acl_fragmentation_total_size = 0; 2377 hci_stack->acl_fragmentation_pos = 0; 2378 if (release_buffer){ 2379 hci_release_packet_buffer(); 2380 } 2381 } 2382 } 2383 2384 // re-enable advertisements for le connections if active 2385 conn = hci_connection_for_handle(handle); 2386 if (!conn) break; 2387 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2388 #ifdef ENABLE_BLE 2389 #ifdef ENABLE_LE_PERIPHERAL 2390 if (hci_is_le_connection(conn)){ 2391 hci_reenable_advertisements_if_needed(); 2392 } 2393 #endif 2394 #endif 2395 break; 2396 2397 case HCI_EVENT_HARDWARE_ERROR: 2398 log_error("Hardware Error: 0x%02x", packet[2]); 2399 if (hci_stack->hardware_error_callback){ 2400 (*hci_stack->hardware_error_callback)(packet[2]); 2401 } else { 2402 // if no special requests, just reboot stack 2403 hci_power_control_off(); 2404 hci_power_control_on(); 2405 } 2406 break; 2407 2408 #ifdef ENABLE_CLASSIC 2409 case HCI_EVENT_ROLE_CHANGE: 2410 if (packet[2]) break; // status != 0 2411 reverse_bd_addr(&packet[3], addr); 2412 addr_type = BD_ADDR_TYPE_ACL; 2413 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2414 if (!conn) break; 2415 conn->role = packet[9]; 2416 break; 2417 #endif 2418 2419 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2420 // release packet buffer only for asynchronous transport and if there are not further fragements 2421 if (hci_transport_synchronous()) { 2422 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2423 return; // instead of break: to avoid re-entering hci_run() 2424 } 2425 hci_stack->acl_fragmentation_tx_active = 0; 2426 if (hci_stack->acl_fragmentation_total_size) break; 2427 hci_release_packet_buffer(); 2428 2429 // L2CAP receives this event via the hci_emit_event below 2430 2431 #ifdef ENABLE_CLASSIC 2432 // For SCO, we do the can_send_now_check here 2433 hci_notify_if_sco_can_send_now(); 2434 #endif 2435 break; 2436 2437 #ifdef ENABLE_CLASSIC 2438 case HCI_EVENT_SCO_CAN_SEND_NOW: 2439 // For SCO, we do the can_send_now_check here 2440 hci_stack->sco_can_send_now = 1; 2441 hci_notify_if_sco_can_send_now(); 2442 return; 2443 2444 // explode inquriy results for easier consumption 2445 case HCI_EVENT_INQUIRY_RESULT: 2446 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2447 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2448 gap_inquiry_explode(packet, size); 2449 break; 2450 #endif 2451 2452 #ifdef ENABLE_BLE 2453 case HCI_EVENT_LE_META: 2454 switch (packet[2]){ 2455 #ifdef ENABLE_LE_CENTRAL 2456 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2457 // log_info("advertising report received"); 2458 if (!hci_stack->le_scanning_enabled) break; 2459 le_handle_advertisement_report(packet, size); 2460 break; 2461 #endif 2462 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2463 // Connection management 2464 reverse_bd_addr(&packet[8], addr); 2465 addr_type = (bd_addr_type_t)packet[7]; 2466 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2467 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2468 2469 #ifdef ENABLE_LE_CENTRAL 2470 // if auto-connect, remove from whitelist in both roles 2471 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2472 hci_remove_from_whitelist(addr_type, addr); 2473 } 2474 // handle error: error is reported only to the initiator -> outgoing connection 2475 if (packet[3]){ 2476 2477 // handle cancelled outgoing connection 2478 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2479 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2480 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2481 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2482 conn = gap_get_outgoing_connection(); 2483 } 2484 2485 // outgoing connection establishment is done 2486 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2487 // remove entry 2488 if (conn){ 2489 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2490 btstack_memory_hci_connection_free( conn ); 2491 } 2492 break; 2493 } 2494 #endif 2495 // on success, both hosts receive connection complete event 2496 if (packet[6] == HCI_ROLE_MASTER){ 2497 #ifdef ENABLE_LE_CENTRAL 2498 // if we're master, it was an outgoing connection and we're done with it 2499 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2500 #endif 2501 } else { 2502 #ifdef ENABLE_LE_PERIPHERAL 2503 // if we're slave, it was an incoming connection, advertisements have stopped 2504 hci_stack->le_advertisements_active = 0; 2505 #endif 2506 } 2507 // LE connections are auto-accepted, so just create a connection if there isn't one already 2508 if (!conn){ 2509 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2510 } 2511 // no memory, sorry. 2512 if (!conn){ 2513 break; 2514 } 2515 2516 conn->state = OPEN; 2517 conn->role = packet[6]; 2518 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2519 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2520 2521 #ifdef ENABLE_LE_PERIPHERAL 2522 if (packet[6] == HCI_ROLE_SLAVE){ 2523 hci_reenable_advertisements_if_needed(); 2524 } 2525 #endif 2526 2527 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2528 2529 // restart timer 2530 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2531 // btstack_run_loop_add_timer(&conn->timeout); 2532 2533 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2534 2535 hci_emit_nr_connections_changed(); 2536 break; 2537 2538 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2539 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2540 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2541 conn = hci_connection_for_handle(handle); 2542 if (!conn) break; 2543 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2544 break; 2545 2546 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2547 // connection 2548 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2549 conn = hci_connection_for_handle(handle); 2550 if (conn) { 2551 // read arguments 2552 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2553 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2554 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2555 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2556 2557 // validate against current connection parameter range 2558 le_connection_parameter_range_t existing_range; 2559 gap_get_connection_parameter_range(&existing_range); 2560 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2561 if (update_parameter){ 2562 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2563 conn->le_conn_interval_min = le_conn_interval_min; 2564 conn->le_conn_interval_max = le_conn_interval_max; 2565 conn->le_conn_latency = le_conn_latency; 2566 conn->le_supervision_timeout = le_supervision_timeout; 2567 } else { 2568 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2569 } 2570 } 2571 break; 2572 default: 2573 break; 2574 } 2575 break; 2576 #endif 2577 case HCI_EVENT_VENDOR_SPECIFIC: 2578 // Vendor specific commands often create vendor specific event instead of num completed packets 2579 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2580 switch (hci_stack->manufacturer){ 2581 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2582 hci_stack->num_cmd_packets = 1; 2583 break; 2584 default: 2585 break; 2586 } 2587 break; 2588 default: 2589 break; 2590 } 2591 2592 // handle BT initialization 2593 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2594 hci_initializing_event_handler(packet, size); 2595 } 2596 2597 // help with BT sleep 2598 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2599 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2600 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2601 hci_initializing_next_state(); 2602 } 2603 2604 // notify upper stack 2605 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2606 2607 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2608 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2609 if (!packet[2]){ 2610 handle = little_endian_read_16(packet, 3); 2611 hci_connection_t * aConn = hci_connection_for_handle(handle); 2612 if (aConn) { 2613 uint8_t status = aConn->bonding_status; 2614 uint16_t flags = aConn->bonding_flags; 2615 bd_addr_t bd_address; 2616 (void)memcpy(&bd_address, aConn->address, 6); 2617 hci_shutdown_connection(aConn); 2618 // connection struct is gone, don't access anymore 2619 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2620 hci_emit_dedicated_bonding_result(bd_address, status); 2621 } 2622 } 2623 } 2624 } 2625 2626 // execute main loop 2627 hci_run(); 2628 } 2629 2630 #ifdef ENABLE_CLASSIC 2631 2632 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2633 static void sco_schedule_tx(hci_connection_t * conn); 2634 2635 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2636 log_debug("SCO TX Timeout"); 2637 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2638 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2639 if (!conn) return; 2640 2641 // trigger send 2642 conn->sco_tx_ready = 1; 2643 // extra packet if CVSD but SCO buffer is too short 2644 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2645 conn->sco_tx_ready++; 2646 } 2647 hci_notify_if_sco_can_send_now(); 2648 } 2649 2650 2651 #define SCO_TX_AFTER_RX_MS (6) 2652 2653 static void sco_schedule_tx(hci_connection_t * conn){ 2654 2655 uint32_t now = btstack_run_loop_get_time_ms(); 2656 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2657 int time_delta_ms = sco_tx_ms - now; 2658 2659 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2660 2661 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2662 btstack_run_loop_set_timer(timer, time_delta_ms); 2663 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2664 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2665 btstack_run_loop_add_timer(timer); 2666 } 2667 2668 static void sco_handler(uint8_t * packet, uint16_t size){ 2669 // lookup connection struct 2670 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2671 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2672 if (!conn) return; 2673 2674 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2675 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2676 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2677 packet[2] = 0x3c; 2678 memmove(&packet[3], &packet[23], 63); 2679 size = 63; 2680 } 2681 } 2682 2683 if (hci_have_usb_transport()){ 2684 // Nothing to do 2685 } else { 2686 // 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); 2687 if (hci_stack->synchronous_flow_control_enabled == 0){ 2688 uint32_t now = btstack_run_loop_get_time_ms(); 2689 2690 if (!conn->sco_rx_valid){ 2691 // ignore first 10 packets 2692 conn->sco_rx_count++; 2693 // log_debug("sco rx count %u", conn->sco_rx_count); 2694 if (conn->sco_rx_count == 10) { 2695 // use first timestamp as is and pretent it just started 2696 conn->sco_rx_ms = now; 2697 conn->sco_rx_valid = 1; 2698 conn->sco_rx_count = 0; 2699 sco_schedule_tx(conn); 2700 } 2701 } else { 2702 // track expected arrival timme 2703 conn->sco_rx_count++; 2704 conn->sco_rx_ms += 7; 2705 int delta = (int32_t) (now - conn->sco_rx_ms); 2706 if (delta > 0){ 2707 conn->sco_rx_ms++; 2708 } 2709 // log_debug("sco rx %u", conn->sco_rx_ms); 2710 sco_schedule_tx(conn); 2711 } 2712 } 2713 } 2714 // deliver to app 2715 if (hci_stack->sco_packet_handler) { 2716 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2717 } 2718 2719 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2720 conn->num_packets_completed++; 2721 hci_stack->host_completed_packets = 1; 2722 hci_run(); 2723 #endif 2724 } 2725 #endif 2726 2727 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2728 hci_dump_packet(packet_type, 1, packet, size); 2729 switch (packet_type) { 2730 case HCI_EVENT_PACKET: 2731 event_handler(packet, size); 2732 break; 2733 case HCI_ACL_DATA_PACKET: 2734 acl_handler(packet, size); 2735 break; 2736 #ifdef ENABLE_CLASSIC 2737 case HCI_SCO_DATA_PACKET: 2738 sco_handler(packet, size); 2739 break; 2740 #endif 2741 default: 2742 break; 2743 } 2744 } 2745 2746 /** 2747 * @brief Add event packet handler. 2748 */ 2749 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2750 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2751 } 2752 2753 2754 /** Register HCI packet handlers */ 2755 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2756 hci_stack->acl_packet_handler = handler; 2757 } 2758 2759 #ifdef ENABLE_CLASSIC 2760 /** 2761 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2762 */ 2763 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2764 hci_stack->sco_packet_handler = handler; 2765 } 2766 #endif 2767 2768 static void hci_state_reset(void){ 2769 // no connections yet 2770 hci_stack->connections = NULL; 2771 2772 // keep discoverable/connectable as this has been requested by the client(s) 2773 // hci_stack->discoverable = 0; 2774 // hci_stack->connectable = 0; 2775 // hci_stack->bondable = 1; 2776 // hci_stack->own_addr_type = 0; 2777 2778 // buffer is free 2779 hci_stack->hci_packet_buffer_reserved = 0; 2780 2781 // no pending cmds 2782 hci_stack->decline_reason = 0; 2783 hci_stack->new_scan_enable_value = 0xff; 2784 2785 // LE 2786 #ifdef ENABLE_BLE 2787 memset(hci_stack->le_random_address, 0, 6); 2788 hci_stack->le_random_address_set = 0; 2789 #endif 2790 #ifdef ENABLE_LE_CENTRAL 2791 hci_stack->le_scanning_active = 0; 2792 hci_stack->le_scan_type = 0xff; 2793 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2794 hci_stack->le_whitelist = 0; 2795 hci_stack->le_whitelist_capacity = 0; 2796 #endif 2797 } 2798 2799 #ifdef ENABLE_CLASSIC 2800 /** 2801 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2802 */ 2803 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2804 // store and open remote device db 2805 hci_stack->link_key_db = link_key_db; 2806 if (hci_stack->link_key_db) { 2807 hci_stack->link_key_db->open(); 2808 } 2809 } 2810 #endif 2811 2812 void hci_init(const hci_transport_t *transport, const void *config){ 2813 2814 #ifdef HAVE_MALLOC 2815 if (!hci_stack) { 2816 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2817 } 2818 #else 2819 hci_stack = &hci_stack_static; 2820 #endif 2821 memset(hci_stack, 0, sizeof(hci_stack_t)); 2822 2823 // reference to use transport layer implementation 2824 hci_stack->hci_transport = transport; 2825 2826 // reference to used config 2827 hci_stack->config = config; 2828 2829 // setup pointer for outgoing packet buffer 2830 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2831 2832 // max acl payload size defined in config.h 2833 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2834 2835 // register packet handlers with transport 2836 transport->register_packet_handler(&packet_handler); 2837 2838 hci_stack->state = HCI_STATE_OFF; 2839 2840 // class of device 2841 hci_stack->class_of_device = 0x007a020c; // Smartphone 2842 2843 // bondable by default 2844 hci_stack->bondable = 1; 2845 2846 #ifdef ENABLE_CLASSIC 2847 // classic name 2848 hci_stack->local_name = default_classic_name; 2849 2850 // Master slave policy 2851 hci_stack->master_slave_policy = 1; 2852 2853 // Allow Role Switch 2854 hci_stack->allow_role_switch = 1; 2855 2856 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2857 hci_stack->gap_required_encyrption_key_size = 16; 2858 #endif 2859 2860 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2861 hci_stack->ssp_enable = 1; 2862 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2863 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2864 hci_stack->ssp_auto_accept = 1; 2865 2866 // voice setting - signed 16 bit pcm data with CVSD over the air 2867 hci_stack->sco_voice_setting = 0x60; 2868 2869 #ifdef ENABLE_LE_CENTRAL 2870 // connection parameter to use for outgoing connections 2871 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2872 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2873 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2874 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2875 hci_stack->le_connection_latency = 4; // 4 2876 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2877 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2878 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2879 2880 // default LE Scanning 2881 hci_stack->le_scan_interval = 0x1e0; 2882 hci_stack->le_scan_window = 0x30; 2883 #endif 2884 2885 #ifdef ENABLE_LE_PERIPHERAL 2886 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2887 #endif 2888 2889 // connection parameter range used to answer connection parameter update requests in l2cap 2890 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2891 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2892 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2893 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2894 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2895 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2896 2897 hci_state_reset(); 2898 } 2899 2900 /** 2901 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2902 */ 2903 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2904 hci_stack->chipset = chipset_driver; 2905 2906 // reset chipset driver - init is also called on power_up 2907 if (hci_stack->chipset && hci_stack->chipset->init){ 2908 hci_stack->chipset->init(hci_stack->config); 2909 } 2910 } 2911 2912 /** 2913 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2914 */ 2915 void hci_set_control(const btstack_control_t *hardware_control){ 2916 // references to used control implementation 2917 hci_stack->control = hardware_control; 2918 // init with transport config 2919 hardware_control->init(hci_stack->config); 2920 } 2921 2922 void hci_close(void){ 2923 // close remote device db 2924 if (hci_stack->link_key_db) { 2925 hci_stack->link_key_db->close(); 2926 } 2927 2928 btstack_linked_list_iterator_t lit; 2929 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2930 while (btstack_linked_list_iterator_has_next(&lit)){ 2931 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2932 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2933 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2934 hci_shutdown_connection(connection); 2935 } 2936 2937 hci_power_control(HCI_POWER_OFF); 2938 2939 #ifdef HAVE_MALLOC 2940 free(hci_stack); 2941 #endif 2942 hci_stack = NULL; 2943 } 2944 2945 #ifdef ENABLE_CLASSIC 2946 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2947 // validate ranage and set 2948 if (encryption_key_size < 7) return; 2949 if (encryption_key_size > 16) return; 2950 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2951 } 2952 #endif 2953 2954 #ifdef ENABLE_CLASSIC 2955 void gap_set_class_of_device(uint32_t class_of_device){ 2956 hci_stack->class_of_device = class_of_device; 2957 } 2958 2959 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2960 hci_stack->default_link_policy_settings = default_link_policy_settings; 2961 } 2962 2963 void gap_set_allow_role_switch(bool allow_role_switch){ 2964 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 2965 } 2966 2967 uint8_t hci_get_allow_role_switch(void){ 2968 return hci_stack->allow_role_switch; 2969 } 2970 2971 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 2972 hci_stack->link_supervision_timeout = link_supervision_timeout; 2973 } 2974 2975 void hci_disable_l2cap_timeout_check(void){ 2976 disable_l2cap_timeouts = 1; 2977 } 2978 #endif 2979 2980 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2981 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2982 void hci_set_bd_addr(bd_addr_t addr){ 2983 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 2984 hci_stack->custom_bd_addr_set = 1; 2985 } 2986 #endif 2987 2988 // State-Module-Driver overview 2989 // state module low-level 2990 // HCI_STATE_OFF off close 2991 // HCI_STATE_INITIALIZING, on open 2992 // HCI_STATE_WORKING, on open 2993 // HCI_STATE_HALTING, on open 2994 // HCI_STATE_SLEEPING, off/sleep close 2995 // HCI_STATE_FALLING_ASLEEP on open 2996 2997 static int hci_power_control_on(void){ 2998 2999 // power on 3000 int err = 0; 3001 if (hci_stack->control && hci_stack->control->on){ 3002 err = (*hci_stack->control->on)(); 3003 } 3004 if (err){ 3005 log_error( "POWER_ON failed"); 3006 hci_emit_hci_open_failed(); 3007 return err; 3008 } 3009 3010 // int chipset driver 3011 if (hci_stack->chipset && hci_stack->chipset->init){ 3012 hci_stack->chipset->init(hci_stack->config); 3013 } 3014 3015 // init transport 3016 if (hci_stack->hci_transport->init){ 3017 hci_stack->hci_transport->init(hci_stack->config); 3018 } 3019 3020 // open transport 3021 err = hci_stack->hci_transport->open(); 3022 if (err){ 3023 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3024 if (hci_stack->control && hci_stack->control->off){ 3025 (*hci_stack->control->off)(); 3026 } 3027 hci_emit_hci_open_failed(); 3028 return err; 3029 } 3030 return 0; 3031 } 3032 3033 static void hci_power_control_off(void){ 3034 3035 log_info("hci_power_control_off"); 3036 3037 // close low-level device 3038 hci_stack->hci_transport->close(); 3039 3040 log_info("hci_power_control_off - hci_transport closed"); 3041 3042 // power off 3043 if (hci_stack->control && hci_stack->control->off){ 3044 (*hci_stack->control->off)(); 3045 } 3046 3047 log_info("hci_power_control_off - control closed"); 3048 3049 hci_stack->state = HCI_STATE_OFF; 3050 } 3051 3052 static void hci_power_control_sleep(void){ 3053 3054 log_info("hci_power_control_sleep"); 3055 3056 #if 0 3057 // don't close serial port during sleep 3058 3059 // close low-level device 3060 hci_stack->hci_transport->close(hci_stack->config); 3061 #endif 3062 3063 // sleep mode 3064 if (hci_stack->control && hci_stack->control->sleep){ 3065 (*hci_stack->control->sleep)(); 3066 } 3067 3068 hci_stack->state = HCI_STATE_SLEEPING; 3069 } 3070 3071 static int hci_power_control_wake(void){ 3072 3073 log_info("hci_power_control_wake"); 3074 3075 // wake on 3076 if (hci_stack->control && hci_stack->control->wake){ 3077 (*hci_stack->control->wake)(); 3078 } 3079 3080 #if 0 3081 // open low-level device 3082 int err = hci_stack->hci_transport->open(hci_stack->config); 3083 if (err){ 3084 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3085 if (hci_stack->control && hci_stack->control->off){ 3086 (*hci_stack->control->off)(); 3087 } 3088 hci_emit_hci_open_failed(); 3089 return err; 3090 } 3091 #endif 3092 3093 return 0; 3094 } 3095 3096 static void hci_power_transition_to_initializing(void){ 3097 // set up state machine 3098 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3099 hci_stack->hci_packet_buffer_reserved = 0; 3100 hci_stack->state = HCI_STATE_INITIALIZING; 3101 hci_stack->substate = HCI_INIT_SEND_RESET; 3102 } 3103 3104 int hci_power_control(HCI_POWER_MODE power_mode){ 3105 3106 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3107 3108 int err = 0; 3109 switch (hci_stack->state){ 3110 3111 case HCI_STATE_OFF: 3112 switch (power_mode){ 3113 case HCI_POWER_ON: 3114 err = hci_power_control_on(); 3115 if (err) { 3116 log_error("hci_power_control_on() error %d", err); 3117 return err; 3118 } 3119 hci_power_transition_to_initializing(); 3120 break; 3121 case HCI_POWER_OFF: 3122 // do nothing 3123 break; 3124 case HCI_POWER_SLEEP: 3125 // do nothing (with SLEEP == OFF) 3126 break; 3127 } 3128 break; 3129 3130 case HCI_STATE_INITIALIZING: 3131 switch (power_mode){ 3132 case HCI_POWER_ON: 3133 // do nothing 3134 break; 3135 case HCI_POWER_OFF: 3136 // no connections yet, just turn it off 3137 hci_power_control_off(); 3138 break; 3139 case HCI_POWER_SLEEP: 3140 // no connections yet, just turn it off 3141 hci_power_control_sleep(); 3142 break; 3143 } 3144 break; 3145 3146 case HCI_STATE_WORKING: 3147 switch (power_mode){ 3148 case HCI_POWER_ON: 3149 // do nothing 3150 break; 3151 case HCI_POWER_OFF: 3152 // see hci_run 3153 hci_stack->state = HCI_STATE_HALTING; 3154 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3155 break; 3156 case HCI_POWER_SLEEP: 3157 // see hci_run 3158 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3159 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3160 break; 3161 } 3162 break; 3163 3164 case HCI_STATE_HALTING: 3165 switch (power_mode){ 3166 case HCI_POWER_ON: 3167 hci_power_transition_to_initializing(); 3168 break; 3169 case HCI_POWER_OFF: 3170 // do nothing 3171 break; 3172 case HCI_POWER_SLEEP: 3173 // see hci_run 3174 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3175 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3176 break; 3177 } 3178 break; 3179 3180 case HCI_STATE_FALLING_ASLEEP: 3181 switch (power_mode){ 3182 case HCI_POWER_ON: 3183 3184 #ifdef HAVE_PLATFORM_IPHONE_OS 3185 // nothing to do, if H4 supports power management 3186 if (btstack_control_iphone_power_management_enabled()){ 3187 hci_stack->state = HCI_STATE_INITIALIZING; 3188 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3189 break; 3190 } 3191 #endif 3192 hci_power_transition_to_initializing(); 3193 break; 3194 case HCI_POWER_OFF: 3195 // see hci_run 3196 hci_stack->state = HCI_STATE_HALTING; 3197 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3198 break; 3199 case HCI_POWER_SLEEP: 3200 // do nothing 3201 break; 3202 } 3203 break; 3204 3205 case HCI_STATE_SLEEPING: 3206 switch (power_mode){ 3207 case HCI_POWER_ON: 3208 3209 #ifdef HAVE_PLATFORM_IPHONE_OS 3210 // nothing to do, if H4 supports power management 3211 if (btstack_control_iphone_power_management_enabled()){ 3212 hci_stack->state = HCI_STATE_INITIALIZING; 3213 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3214 hci_update_scan_enable(); 3215 break; 3216 } 3217 #endif 3218 err = hci_power_control_wake(); 3219 if (err) return err; 3220 hci_power_transition_to_initializing(); 3221 break; 3222 case HCI_POWER_OFF: 3223 hci_stack->state = HCI_STATE_HALTING; 3224 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3225 break; 3226 case HCI_POWER_SLEEP: 3227 // do nothing 3228 break; 3229 } 3230 break; 3231 } 3232 3233 // create internal event 3234 hci_emit_state(); 3235 3236 // trigger next/first action 3237 hci_run(); 3238 3239 return 0; 3240 } 3241 3242 3243 #ifdef ENABLE_CLASSIC 3244 3245 static void hci_update_scan_enable(void){ 3246 // 2 = page scan, 1 = inq scan 3247 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3248 hci_run(); 3249 } 3250 3251 void gap_discoverable_control(uint8_t enable){ 3252 if (enable) enable = 1; // normalize argument 3253 3254 if (hci_stack->discoverable == enable){ 3255 hci_emit_discoverable_enabled(hci_stack->discoverable); 3256 return; 3257 } 3258 3259 hci_stack->discoverable = enable; 3260 hci_update_scan_enable(); 3261 } 3262 3263 void gap_connectable_control(uint8_t enable){ 3264 if (enable) enable = 1; // normalize argument 3265 3266 // don't emit event 3267 if (hci_stack->connectable == enable) return; 3268 3269 hci_stack->connectable = enable; 3270 hci_update_scan_enable(); 3271 } 3272 #endif 3273 3274 void gap_local_bd_addr(bd_addr_t address_buffer){ 3275 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3276 } 3277 3278 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3279 static void hci_host_num_completed_packets(void){ 3280 3281 // create packet manually as arrays are not supported and num_commands should not get reduced 3282 hci_reserve_packet_buffer(); 3283 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3284 3285 uint16_t size = 0; 3286 uint16_t num_handles = 0; 3287 packet[size++] = 0x35; 3288 packet[size++] = 0x0c; 3289 size++; // skip param len 3290 size++; // skip num handles 3291 3292 // add { handle, packets } entries 3293 btstack_linked_item_t * it; 3294 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3295 hci_connection_t * connection = (hci_connection_t *) it; 3296 if (connection->num_packets_completed){ 3297 little_endian_store_16(packet, size, connection->con_handle); 3298 size += 2; 3299 little_endian_store_16(packet, size, connection->num_packets_completed); 3300 size += 2; 3301 // 3302 num_handles++; 3303 connection->num_packets_completed = 0; 3304 } 3305 } 3306 3307 packet[2] = size - 3; 3308 packet[3] = num_handles; 3309 3310 hci_stack->host_completed_packets = 0; 3311 3312 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3313 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3314 3315 // release packet buffer for synchronous transport implementations 3316 if (hci_transport_synchronous()){ 3317 hci_release_packet_buffer(); 3318 hci_emit_transport_packet_sent(); 3319 } 3320 } 3321 #endif 3322 3323 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3324 UNUSED(ds); 3325 hci_stack->substate = HCI_HALTING_CLOSE; 3326 // allow packet handlers to defer final shutdown 3327 hci_emit_state(); 3328 hci_run(); 3329 } 3330 3331 static void hci_run(void){ 3332 3333 // log_info("hci_run: entered"); 3334 btstack_linked_item_t * it; 3335 3336 // send continuation fragments first, as they block the prepared packet buffer 3337 if (hci_stack->acl_fragmentation_total_size > 0) { 3338 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3339 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3340 if (connection) { 3341 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3342 hci_send_acl_packet_fragments(connection); 3343 return; 3344 } 3345 } else { 3346 // connection gone -> discard further fragments 3347 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3348 hci_stack->acl_fragmentation_total_size = 0; 3349 hci_stack->acl_fragmentation_pos = 0; 3350 } 3351 } 3352 3353 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3354 // send host num completed packets next as they don't require num_cmd_packets > 0 3355 if (!hci_can_send_comand_packet_transport()) return; 3356 if (hci_stack->host_completed_packets){ 3357 hci_host_num_completed_packets(); 3358 return; 3359 } 3360 #endif 3361 3362 if (!hci_can_send_command_packet_now()) return; 3363 3364 // global/non-connection oriented commands 3365 3366 #ifdef ENABLE_CLASSIC 3367 // decline incoming connections 3368 if (hci_stack->decline_reason){ 3369 uint8_t reason = hci_stack->decline_reason; 3370 hci_stack->decline_reason = 0; 3371 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3372 return; 3373 } 3374 // send scan enable 3375 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3376 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3377 hci_stack->new_scan_enable_value = 0xff; 3378 return; 3379 } 3380 // start/stop inquiry 3381 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3382 uint8_t duration = hci_stack->inquiry_state; 3383 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3384 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3385 return; 3386 } 3387 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3388 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3389 hci_send_cmd(&hci_inquiry_cancel); 3390 return; 3391 } 3392 // remote name request 3393 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3394 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3395 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3396 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3397 return; 3398 } 3399 // pairing 3400 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3401 uint8_t state = hci_stack->gap_pairing_state; 3402 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3403 switch (state){ 3404 case GAP_PAIRING_STATE_SEND_PIN: 3405 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); 3406 break; 3407 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3408 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3409 break; 3410 case GAP_PAIRING_STATE_SEND_PASSKEY: 3411 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3412 break; 3413 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3414 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3415 break; 3416 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3417 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3418 break; 3419 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3420 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3421 break; 3422 default: 3423 break; 3424 } 3425 return; 3426 } 3427 #endif 3428 3429 #ifdef ENABLE_BLE 3430 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3431 if ((hci_stack->state == HCI_STATE_WORKING) 3432 && ((hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC) || hci_stack->le_random_address_set)){ 3433 3434 #ifdef ENABLE_LE_CENTRAL 3435 // parameter change requires scanning to be stopped first 3436 if (hci_stack->le_scan_type != 0xff) { 3437 if (hci_stack->le_scanning_active){ 3438 hci_stack->le_scanning_active = 0; 3439 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3440 } else { 3441 int scan_type = (int) hci_stack->le_scan_type; 3442 hci_stack->le_scan_type = 0xff; 3443 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); 3444 } 3445 return; 3446 } 3447 // finally, we can enable/disable le scan 3448 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3449 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3450 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3451 return; 3452 } 3453 #endif 3454 #ifdef ENABLE_LE_PERIPHERAL 3455 // le advertisement control 3456 if (hci_stack->le_advertisements_todo){ 3457 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3458 } 3459 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3460 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3461 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3462 return; 3463 } 3464 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3465 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3466 hci_send_cmd(&hci_le_set_advertising_parameters, 3467 hci_stack->le_advertisements_interval_min, 3468 hci_stack->le_advertisements_interval_max, 3469 hci_stack->le_advertisements_type, 3470 hci_stack->le_own_addr_type, 3471 hci_stack->le_advertisements_direct_address_type, 3472 hci_stack->le_advertisements_direct_address, 3473 hci_stack->le_advertisements_channel_map, 3474 hci_stack->le_advertisements_filter_policy); 3475 return; 3476 } 3477 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3478 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3479 uint8_t adv_data_clean[31]; 3480 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3481 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3482 hci_stack->le_advertisements_data_len); 3483 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3484 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3485 return; 3486 } 3487 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3488 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3489 uint8_t scan_data_clean[31]; 3490 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3491 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3492 hci_stack->le_scan_response_data_len); 3493 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3494 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3495 return; 3496 } 3497 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3498 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3499 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3500 return; 3501 } 3502 #endif 3503 3504 #ifdef ENABLE_LE_CENTRAL 3505 // 3506 // LE Whitelist Management 3507 // 3508 3509 // check if whitelist needs modification 3510 btstack_linked_list_iterator_t lit; 3511 int modification_pending = 0; 3512 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3513 while (btstack_linked_list_iterator_has_next(&lit)){ 3514 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3515 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3516 modification_pending = 1; 3517 break; 3518 } 3519 } 3520 3521 if (modification_pending){ 3522 // stop connnecting if modification pending 3523 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3524 hci_send_cmd(&hci_le_create_connection_cancel); 3525 return; 3526 } 3527 3528 // add/remove entries 3529 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3530 while (btstack_linked_list_iterator_has_next(&lit)){ 3531 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3532 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3533 entry->state = LE_WHITELIST_ON_CONTROLLER; 3534 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3535 return; 3536 3537 } 3538 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3539 bd_addr_t address; 3540 bd_addr_type_t address_type = entry->address_type; 3541 (void)memcpy(address, entry->address, 6); 3542 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3543 btstack_memory_whitelist_entry_free(entry); 3544 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3545 return; 3546 } 3547 } 3548 } 3549 3550 // start connecting 3551 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3552 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3553 bd_addr_t null_addr; 3554 memset(null_addr, 0, 6); 3555 hci_send_cmd(&hci_le_create_connection, 3556 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3557 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3558 1, // use whitelist 3559 0, // peer address type 3560 null_addr, // peer bd addr 3561 hci_stack->le_own_addr_type, // our addr type: 3562 hci_stack->le_connection_interval_min, // conn interval min 3563 hci_stack->le_connection_interval_max, // conn interval max 3564 hci_stack->le_connection_latency, // conn latency 3565 hci_stack->le_supervision_timeout, // conn latency 3566 hci_stack->le_minimum_ce_length, // min ce length 3567 hci_stack->le_maximum_ce_length // max ce length 3568 ); 3569 return; 3570 } 3571 #endif 3572 } 3573 #endif 3574 3575 // send pending HCI commands 3576 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3577 hci_connection_t * connection = (hci_connection_t *) it; 3578 3579 switch(connection->state){ 3580 case SEND_CREATE_CONNECTION: 3581 switch(connection->address_type){ 3582 #ifdef ENABLE_CLASSIC 3583 case BD_ADDR_TYPE_ACL: 3584 log_info("sending hci_create_connection"); 3585 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3586 break; 3587 #endif 3588 default: 3589 #ifdef ENABLE_BLE 3590 #ifdef ENABLE_LE_CENTRAL 3591 // track outgoing connection 3592 hci_stack->outgoing_addr_type = connection->address_type; 3593 (void)memcpy(hci_stack->outgoing_addr, 3594 connection->address, 6); 3595 log_info("sending hci_le_create_connection"); 3596 hci_send_cmd(&hci_le_create_connection, 3597 hci_stack->le_connection_scan_interval, // conn scan interval 3598 hci_stack->le_connection_scan_window, // conn scan windows 3599 0, // don't use whitelist 3600 connection->address_type, // peer address type 3601 connection->address, // peer bd addr 3602 hci_stack->le_own_addr_type, // our addr type: 3603 hci_stack->le_connection_interval_min, // conn interval min 3604 hci_stack->le_connection_interval_max, // conn interval max 3605 hci_stack->le_connection_latency, // conn latency 3606 hci_stack->le_supervision_timeout, // conn latency 3607 hci_stack->le_minimum_ce_length, // min ce length 3608 hci_stack->le_maximum_ce_length // max ce length 3609 ); 3610 connection->state = SENT_CREATE_CONNECTION; 3611 #endif 3612 #endif 3613 break; 3614 } 3615 return; 3616 3617 #ifdef ENABLE_CLASSIC 3618 case RECEIVED_CONNECTION_REQUEST: 3619 connection->role = HCI_ROLE_SLAVE; 3620 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3621 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3622 connection->state = ACCEPTED_CONNECTION_REQUEST; 3623 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3624 } 3625 return; 3626 #endif 3627 3628 #ifdef ENABLE_BLE 3629 #ifdef ENABLE_LE_CENTRAL 3630 case SEND_CANCEL_CONNECTION: 3631 connection->state = SENT_CANCEL_CONNECTION; 3632 hci_send_cmd(&hci_le_create_connection_cancel); 3633 return; 3634 #endif 3635 #endif 3636 case SEND_DISCONNECT: 3637 connection->state = SENT_DISCONNECT; 3638 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3639 return; 3640 3641 default: 3642 break; 3643 } 3644 3645 // no further commands if connection is about to get shut down 3646 if (connection->state == SENT_DISCONNECT) continue; 3647 3648 if (connection->authentication_flags & READ_RSSI){ 3649 connectionClearAuthenticationFlags(connection, READ_RSSI); 3650 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3651 return; 3652 } 3653 3654 #ifdef ENABLE_CLASSIC 3655 3656 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3657 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3658 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3659 return; 3660 } 3661 3662 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3663 log_info("responding to link key request"); 3664 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3665 link_key_t link_key; 3666 link_key_type_t link_key_type; 3667 if ( hci_stack->link_key_db 3668 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3669 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3670 connection->link_key_type = link_key_type; 3671 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3672 } else { 3673 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3674 } 3675 return; 3676 } 3677 3678 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3679 log_info("denying to pin request"); 3680 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3681 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3682 return; 3683 } 3684 3685 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3686 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3687 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3688 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3689 // tweak authentication requirements 3690 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3691 if (connection->bonding_flags & BONDING_DEDICATED){ 3692 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3693 } 3694 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3695 authreq |= 1; 3696 } 3697 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3698 } else { 3699 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3700 } 3701 return; 3702 } 3703 3704 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3705 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3706 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3707 return; 3708 } 3709 3710 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3711 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3712 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3713 return; 3714 } 3715 3716 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3717 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3718 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3719 return; 3720 } 3721 3722 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3723 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3724 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3725 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3726 return; 3727 } 3728 3729 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3730 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3731 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3732 return; 3733 } 3734 3735 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3736 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3737 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3738 return; 3739 } 3740 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3741 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3742 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3743 return; 3744 } 3745 #endif 3746 3747 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3748 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3749 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3750 return; 3751 } 3752 3753 #ifdef ENABLE_CLASSIC 3754 uint16_t sniff_min_interval; 3755 switch (connection->sniff_min_interval){ 3756 case 0: 3757 break; 3758 case 0xffff: 3759 connection->sniff_min_interval = 0; 3760 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3761 return; 3762 default: 3763 sniff_min_interval = connection->sniff_min_interval; 3764 connection->sniff_min_interval = 0; 3765 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3766 return; 3767 } 3768 #endif 3769 3770 #ifdef ENABLE_BLE 3771 switch (connection->le_con_parameter_update_state){ 3772 // response to L2CAP CON PARAMETER UPDATE REQUEST 3773 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3774 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3775 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3776 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3777 0x0000, 0xffff); 3778 return; 3779 case CON_PARAMETER_UPDATE_REPLY: 3780 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3781 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3782 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3783 0x0000, 0xffff); 3784 return; 3785 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3786 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3787 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3788 return; 3789 default: 3790 break; 3791 } 3792 if (connection->le_phy_update_all_phys != 0xff){ 3793 uint8_t all_phys = connection->le_phy_update_all_phys; 3794 connection->le_phy_update_all_phys = 0xff; 3795 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); 3796 return; 3797 } 3798 #endif 3799 } 3800 3801 hci_connection_t * connection; 3802 switch (hci_stack->state){ 3803 case HCI_STATE_INITIALIZING: 3804 hci_initializing_run(); 3805 break; 3806 3807 case HCI_STATE_HALTING: 3808 3809 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3810 switch (hci_stack->substate){ 3811 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3812 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3813 3814 #ifdef ENABLE_BLE 3815 #ifdef ENABLE_LE_CENTRAL 3816 // free whitelist entries 3817 { 3818 btstack_linked_list_iterator_t lit; 3819 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3820 while (btstack_linked_list_iterator_has_next(&lit)){ 3821 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3822 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3823 btstack_memory_whitelist_entry_free(entry); 3824 } 3825 } 3826 #endif 3827 #endif 3828 // close all open connections 3829 connection = (hci_connection_t *) hci_stack->connections; 3830 if (connection){ 3831 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3832 if (!hci_can_send_command_packet_now()) return; 3833 3834 // check state 3835 if (connection->state == SENT_DISCONNECT) return; 3836 connection->state = SENT_DISCONNECT; 3837 3838 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3839 3840 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3841 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3842 3843 // ... which would be ignored anyway as we shutdown (free) the connection now 3844 hci_shutdown_connection(connection); 3845 3846 // finally, send the disconnect command 3847 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3848 return; 3849 } 3850 3851 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3852 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3853 log_info("HCI_STATE_HALTING: wait 50 ms"); 3854 hci_stack->substate = HCI_HALTING_W4_TIMER; 3855 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3856 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3857 btstack_run_loop_add_timer(&hci_stack->timeout); 3858 break; 3859 } 3860 3861 /* fall through */ 3862 3863 case HCI_HALTING_CLOSE: 3864 log_info("HCI_STATE_HALTING, calling off"); 3865 3866 // switch mode 3867 hci_power_control_off(); 3868 3869 log_info("HCI_STATE_HALTING, emitting state"); 3870 hci_emit_state(); 3871 log_info("HCI_STATE_HALTING, done"); 3872 break; 3873 3874 case HCI_HALTING_W4_TIMER: 3875 // keep waiting 3876 3877 break; 3878 default: 3879 break; 3880 } 3881 3882 break; 3883 3884 case HCI_STATE_FALLING_ASLEEP: 3885 switch(hci_stack->substate) { 3886 case HCI_FALLING_ASLEEP_DISCONNECT: 3887 log_info("HCI_STATE_FALLING_ASLEEP"); 3888 // close all open connections 3889 connection = (hci_connection_t *) hci_stack->connections; 3890 3891 #ifdef HAVE_PLATFORM_IPHONE_OS 3892 // don't close connections, if H4 supports power management 3893 if (btstack_control_iphone_power_management_enabled()){ 3894 connection = NULL; 3895 } 3896 #endif 3897 if (connection){ 3898 3899 // send disconnect 3900 if (!hci_can_send_command_packet_now()) return; 3901 3902 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3903 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3904 3905 // send disconnected event right away - causes higher layer connections to get closed, too. 3906 hci_shutdown_connection(connection); 3907 return; 3908 } 3909 3910 if (hci_classic_supported()){ 3911 // disable page and inquiry scan 3912 if (!hci_can_send_command_packet_now()) return; 3913 3914 log_info("HCI_STATE_HALTING, disabling inq scans"); 3915 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3916 3917 // continue in next sub state 3918 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3919 break; 3920 } 3921 3922 /* fall through */ 3923 3924 case HCI_FALLING_ASLEEP_COMPLETE: 3925 log_info("HCI_STATE_HALTING, calling sleep"); 3926 #ifdef HAVE_PLATFORM_IPHONE_OS 3927 // don't actually go to sleep, if H4 supports power management 3928 if (btstack_control_iphone_power_management_enabled()){ 3929 // SLEEP MODE reached 3930 hci_stack->state = HCI_STATE_SLEEPING; 3931 hci_emit_state(); 3932 break; 3933 } 3934 #endif 3935 // switch mode 3936 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3937 hci_emit_state(); 3938 break; 3939 3940 default: 3941 break; 3942 } 3943 break; 3944 3945 default: 3946 break; 3947 } 3948 } 3949 3950 int hci_send_cmd_packet(uint8_t *packet, int size){ 3951 // house-keeping 3952 3953 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3954 hci_stack->loopback_mode = packet[3]; 3955 } 3956 3957 #ifdef ENABLE_CLASSIC 3958 bd_addr_t addr; 3959 hci_connection_t * conn; 3960 3961 // create_connection? 3962 if (IS_COMMAND(packet, hci_create_connection)){ 3963 reverse_bd_addr(&packet[3], addr); 3964 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3965 3966 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3967 if (!conn){ 3968 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3969 if (!conn){ 3970 // notify client that alloc failed 3971 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3972 return -1; // packet not sent to controller 3973 } 3974 conn->state = SEND_CREATE_CONNECTION; 3975 } 3976 log_info("conn state %u", conn->state); 3977 switch (conn->state){ 3978 // if connection active exists 3979 case OPEN: 3980 // and OPEN, emit connection complete command 3981 hci_emit_connection_complete(addr, conn->con_handle, 0); 3982 return -1; // packet not sent to controller 3983 case SEND_CREATE_CONNECTION: 3984 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3985 break; 3986 default: 3987 // otherwise, just ignore as it is already in the open process 3988 return -1; // packet not sent to controller 3989 } 3990 conn->state = SENT_CREATE_CONNECTION; 3991 3992 // track outgoing connection 3993 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 3994 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 3995 } 3996 3997 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3998 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3999 } 4000 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4001 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4002 } 4003 4004 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4005 if (hci_stack->link_key_db){ 4006 reverse_bd_addr(&packet[3], addr); 4007 hci_stack->link_key_db->delete_link_key(addr); 4008 } 4009 } 4010 4011 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4012 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4013 reverse_bd_addr(&packet[3], addr); 4014 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4015 if (conn){ 4016 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4017 } 4018 } 4019 4020 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4021 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4022 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4023 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4024 reverse_bd_addr(&packet[3], addr); 4025 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4026 if (conn){ 4027 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4028 } 4029 } 4030 4031 #ifdef ENABLE_SCO_OVER_HCI 4032 // setup_synchronous_connection? Voice setting at offset 22 4033 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4034 // TODO: compare to current setting if sco connection already active 4035 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4036 } 4037 // accept_synchronus_connection? Voice setting at offset 18 4038 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4039 // TODO: compare to current setting if sco connection already active 4040 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4041 } 4042 #endif 4043 #endif 4044 4045 #ifdef ENABLE_BLE 4046 if (IS_COMMAND(packet, hci_le_set_random_address)){ 4047 hci_stack->le_random_address_set = 1; 4048 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4049 } 4050 #ifdef ENABLE_LE_PERIPHERAL 4051 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4052 hci_stack->le_advertisements_active = packet[3]; 4053 } 4054 #endif 4055 #ifdef ENABLE_LE_CENTRAL 4056 if (IS_COMMAND(packet, hci_le_create_connection)){ 4057 // white list used? 4058 uint8_t initiator_filter_policy = packet[7]; 4059 switch (initiator_filter_policy){ 4060 case 0: 4061 // whitelist not used 4062 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4063 break; 4064 case 1: 4065 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4066 break; 4067 default: 4068 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4069 break; 4070 } 4071 } 4072 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4073 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4074 } 4075 #endif 4076 #endif 4077 4078 hci_stack->num_cmd_packets--; 4079 4080 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4081 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4082 } 4083 4084 // disconnect because of security block 4085 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4086 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4087 if (!connection) return; 4088 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4089 } 4090 4091 4092 // Configure Secure Simple Pairing 4093 4094 #ifdef ENABLE_CLASSIC 4095 4096 // enable will enable SSP during init 4097 void gap_ssp_set_enable(int enable){ 4098 hci_stack->ssp_enable = enable; 4099 } 4100 4101 static int hci_local_ssp_activated(void){ 4102 return gap_ssp_supported() && hci_stack->ssp_enable; 4103 } 4104 4105 // if set, BTstack will respond to io capability request using authentication requirement 4106 void gap_ssp_set_io_capability(int io_capability){ 4107 hci_stack->ssp_io_capability = io_capability; 4108 } 4109 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4110 hci_stack->ssp_authentication_requirement = authentication_requirement; 4111 } 4112 4113 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4114 void gap_ssp_set_auto_accept(int auto_accept){ 4115 hci_stack->ssp_auto_accept = auto_accept; 4116 } 4117 #endif 4118 4119 // va_list part of hci_send_cmd 4120 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4121 if (!hci_can_send_command_packet_now()){ 4122 log_error("hci_send_cmd called but cannot send packet now"); 4123 return 0; 4124 } 4125 4126 // for HCI INITIALIZATION 4127 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4128 hci_stack->last_cmd_opcode = cmd->opcode; 4129 4130 hci_reserve_packet_buffer(); 4131 uint8_t * packet = hci_stack->hci_packet_buffer; 4132 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4133 int err = hci_send_cmd_packet(packet, size); 4134 4135 // release packet buffer for synchronous transport implementations 4136 if (hci_transport_synchronous()){ 4137 hci_release_packet_buffer(); 4138 hci_emit_transport_packet_sent(); 4139 } 4140 4141 return err; 4142 } 4143 4144 /** 4145 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4146 */ 4147 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4148 va_list argptr; 4149 va_start(argptr, cmd); 4150 int res = hci_send_cmd_va_arg(cmd, argptr); 4151 va_end(argptr); 4152 return res; 4153 } 4154 4155 // Create various non-HCI events. 4156 // TODO: generalize, use table similar to hci_create_command 4157 4158 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4159 // dump packet 4160 if (dump) { 4161 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4162 } 4163 4164 // dispatch to all event handlers 4165 btstack_linked_list_iterator_t it; 4166 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4167 while (btstack_linked_list_iterator_has_next(&it)){ 4168 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4169 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4170 } 4171 } 4172 4173 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4174 if (!hci_stack->acl_packet_handler) return; 4175 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4176 } 4177 4178 #ifdef ENABLE_CLASSIC 4179 static void hci_notify_if_sco_can_send_now(void){ 4180 // notify SCO sender if waiting 4181 if (!hci_stack->sco_waiting_for_can_send_now) return; 4182 if (hci_can_send_sco_packet_now()){ 4183 hci_stack->sco_waiting_for_can_send_now = 0; 4184 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4185 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4186 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4187 } 4188 } 4189 4190 // parsing end emitting has been merged to reduce code size 4191 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4192 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4193 4194 uint8_t * eir_data; 4195 ad_context_t context; 4196 const uint8_t * name; 4197 uint8_t name_len; 4198 4199 if (size < 3) return; 4200 4201 int event_type = hci_event_packet_get_type(packet); 4202 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4203 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4204 4205 switch (event_type){ 4206 case HCI_EVENT_INQUIRY_RESULT: 4207 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4208 if (size != (3 + (num_responses * 14))) return; 4209 break; 4210 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4211 if (size != 257) return; 4212 if (num_responses != 1) return; 4213 break; 4214 default: 4215 return; 4216 } 4217 4218 // event[1] is set at the end 4219 int i; 4220 for (i=0; i<num_responses;i++){ 4221 memset(event, 0, sizeof(event)); 4222 event[0] = GAP_EVENT_INQUIRY_RESULT; 4223 uint8_t event_size = 18; // if name is not set by EIR 4224 4225 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4226 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4227 (void)memcpy(&event[9], 4228 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4229 3); // class of device 4230 (void)memcpy(&event[12], 4231 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4232 2); // clock offset 4233 4234 switch (event_type){ 4235 case HCI_EVENT_INQUIRY_RESULT: 4236 // 14,15,16,17 = 0, size 18 4237 break; 4238 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4239 event[14] = 1; 4240 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4241 // 16,17 = 0, size 18 4242 break; 4243 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4244 event[14] = 1; 4245 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4246 // for EIR packets, there is only one reponse in it 4247 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4248 name = NULL; 4249 // EIR data is 240 bytes in EIR event 4250 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4251 uint8_t data_type = ad_iterator_get_data_type(&context); 4252 uint8_t data_size = ad_iterator_get_data_len(&context); 4253 const uint8_t * data = ad_iterator_get_data(&context); 4254 // Prefer Complete Local Name over Shortend Local Name 4255 switch (data_type){ 4256 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4257 if (name) continue; 4258 /* fall through */ 4259 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4260 name = data; 4261 name_len = data_size; 4262 break; 4263 default: 4264 break; 4265 } 4266 } 4267 if (name){ 4268 event[16] = 1; 4269 // truncate name if needed 4270 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4271 event[17] = len; 4272 (void)memcpy(&event[18], name, len); 4273 event_size += len; 4274 } 4275 break; 4276 } 4277 event[1] = event_size - 2; 4278 hci_emit_event(event, event_size, 1); 4279 } 4280 } 4281 #endif 4282 4283 void hci_emit_state(void){ 4284 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4285 uint8_t event[3]; 4286 event[0] = BTSTACK_EVENT_STATE; 4287 event[1] = sizeof(event) - 2; 4288 event[2] = hci_stack->state; 4289 hci_emit_event(event, sizeof(event), 1); 4290 } 4291 4292 #ifdef ENABLE_CLASSIC 4293 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4294 uint8_t event[13]; 4295 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4296 event[1] = sizeof(event) - 2; 4297 event[2] = status; 4298 little_endian_store_16(event, 3, con_handle); 4299 reverse_bd_addr(address, &event[5]); 4300 event[11] = 1; // ACL connection 4301 event[12] = 0; // encryption disabled 4302 hci_emit_event(event, sizeof(event), 1); 4303 } 4304 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4305 if (disable_l2cap_timeouts) return; 4306 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4307 uint8_t event[4]; 4308 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4309 event[1] = sizeof(event) - 2; 4310 little_endian_store_16(event, 2, conn->con_handle); 4311 hci_emit_event(event, sizeof(event), 1); 4312 } 4313 #endif 4314 4315 #ifdef ENABLE_BLE 4316 #ifdef ENABLE_LE_CENTRAL 4317 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4318 uint8_t event[21]; 4319 event[0] = HCI_EVENT_LE_META; 4320 event[1] = sizeof(event) - 2; 4321 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4322 event[3] = status; 4323 little_endian_store_16(event, 4, con_handle); 4324 event[6] = 0; // TODO: role 4325 event[7] = address_type; 4326 reverse_bd_addr(address, &event[8]); 4327 little_endian_store_16(event, 14, 0); // interval 4328 little_endian_store_16(event, 16, 0); // latency 4329 little_endian_store_16(event, 18, 0); // supervision timeout 4330 event[20] = 0; // master clock accuracy 4331 hci_emit_event(event, sizeof(event), 1); 4332 } 4333 #endif 4334 #endif 4335 4336 static void hci_emit_transport_packet_sent(void){ 4337 // notify upper stack that it might be possible to send again 4338 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4339 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4340 } 4341 4342 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4343 uint8_t event[6]; 4344 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4345 event[1] = sizeof(event) - 2; 4346 event[2] = 0; // status = OK 4347 little_endian_store_16(event, 3, con_handle); 4348 event[5] = reason; 4349 hci_emit_event(event, sizeof(event), 1); 4350 } 4351 4352 static void hci_emit_nr_connections_changed(void){ 4353 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4354 uint8_t event[3]; 4355 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4356 event[1] = sizeof(event) - 2; 4357 event[2] = nr_hci_connections(); 4358 hci_emit_event(event, sizeof(event), 1); 4359 } 4360 4361 static void hci_emit_hci_open_failed(void){ 4362 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4363 uint8_t event[2]; 4364 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4365 event[1] = sizeof(event) - 2; 4366 hci_emit_event(event, sizeof(event), 1); 4367 } 4368 4369 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4370 log_info("hci_emit_dedicated_bonding_result %u ", status); 4371 uint8_t event[9]; 4372 int pos = 0; 4373 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4374 event[pos++] = sizeof(event) - 2; 4375 event[pos++] = status; 4376 reverse_bd_addr(address, &event[pos]); 4377 hci_emit_event(event, sizeof(event), 1); 4378 } 4379 4380 4381 #ifdef ENABLE_CLASSIC 4382 4383 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4384 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4385 uint8_t event[5]; 4386 int pos = 0; 4387 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4388 event[pos++] = sizeof(event) - 2; 4389 little_endian_store_16(event, 2, con_handle); 4390 pos += 2; 4391 event[pos++] = level; 4392 hci_emit_event(event, sizeof(event), 1); 4393 } 4394 4395 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4396 if (!connection) return LEVEL_0; 4397 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4398 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4399 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4400 // LEVEL 4 always requires 128 bit encrytion key size 4401 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4402 security_level = LEVEL_3; 4403 } 4404 return security_level; 4405 } 4406 4407 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4408 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4409 uint8_t event[3]; 4410 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4411 event[1] = sizeof(event) - 2; 4412 event[2] = enabled; 4413 hci_emit_event(event, sizeof(event), 1); 4414 } 4415 4416 // query if remote side supports eSCO 4417 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4418 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4419 if (!connection) return 0; 4420 return connection->remote_supported_feature_eSCO; 4421 } 4422 4423 // query if remote side supports SSP 4424 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4425 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4426 if (!connection) return 0; 4427 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4428 } 4429 4430 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4431 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4432 } 4433 4434 // GAP API 4435 /** 4436 * @bbrief enable/disable bonding. default is enabled 4437 * @praram enabled 4438 */ 4439 void gap_set_bondable_mode(int enable){ 4440 hci_stack->bondable = enable ? 1 : 0; 4441 } 4442 /** 4443 * @brief Get bondable mode. 4444 * @return 1 if bondable 4445 */ 4446 int gap_get_bondable_mode(void){ 4447 return hci_stack->bondable; 4448 } 4449 4450 /** 4451 * @brief map link keys to security levels 4452 */ 4453 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4454 switch (link_key_type){ 4455 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4456 return LEVEL_4; 4457 case COMBINATION_KEY: 4458 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4459 return LEVEL_3; 4460 default: 4461 return LEVEL_2; 4462 } 4463 } 4464 4465 /** 4466 * @brief map link keys to secure connection yes/no 4467 */ 4468 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4469 switch (link_key_type){ 4470 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4471 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4472 return 1; 4473 default: 4474 return 0; 4475 } 4476 } 4477 4478 /** 4479 * @brief map link keys to authenticated 4480 */ 4481 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4482 switch (link_key_type){ 4483 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4484 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4485 return 1; 4486 default: 4487 return 0; 4488 } 4489 } 4490 4491 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4492 log_info("gap_mitm_protection_required_for_security_level %u", level); 4493 return level > LEVEL_2; 4494 } 4495 4496 /** 4497 * @brief get current security level 4498 */ 4499 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4500 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4501 if (!connection) return LEVEL_0; 4502 return gap_security_level_for_connection(connection); 4503 } 4504 4505 /** 4506 * @brief request connection to device to 4507 * @result GAP_AUTHENTICATION_RESULT 4508 */ 4509 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4510 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4511 if (!connection){ 4512 hci_emit_security_level(con_handle, LEVEL_0); 4513 return; 4514 } 4515 gap_security_level_t current_level = gap_security_level(con_handle); 4516 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4517 requested_level, connection->requested_security_level, current_level); 4518 4519 // assumption: earlier requested security higher than current level => security request is active 4520 if (current_level < connection->requested_security_level){ 4521 if (connection->requested_security_level < requested_level){ 4522 // increase requested level as new level is higher 4523 4524 // TODO: handle re-authentication when done 4525 4526 connection->requested_security_level = requested_level; 4527 } 4528 return; 4529 } 4530 4531 // no request active, notify if security sufficient 4532 if (requested_level <= current_level){ 4533 hci_emit_security_level(con_handle, current_level); 4534 return; 4535 } 4536 4537 // start pairing to increase security level 4538 connection->requested_security_level = requested_level; 4539 4540 #if 0 4541 // sending encryption request without a link key results in an error. 4542 // TODO: figure out how to use it properly 4543 4544 // would enabling ecnryption suffice (>= LEVEL_2)? 4545 if (hci_stack->link_key_db){ 4546 link_key_type_t link_key_type; 4547 link_key_t link_key; 4548 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4549 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4550 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4551 return; 4552 } 4553 } 4554 } 4555 #endif 4556 4557 // start to authenticate connection 4558 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4559 hci_run(); 4560 } 4561 4562 /** 4563 * @brief start dedicated bonding with device. disconnect after bonding 4564 * @param device 4565 * @param request MITM protection 4566 * @result GAP_DEDICATED_BONDING_COMPLETE 4567 */ 4568 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4569 4570 // create connection state machine 4571 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4572 4573 if (!connection){ 4574 return BTSTACK_MEMORY_ALLOC_FAILED; 4575 } 4576 4577 // delete linkn key 4578 gap_drop_link_key_for_bd_addr(device); 4579 4580 // configure LEVEL_2/3, dedicated bonding 4581 connection->state = SEND_CREATE_CONNECTION; 4582 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4583 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4584 connection->bonding_flags = BONDING_DEDICATED; 4585 4586 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4587 4588 // handle: connnection failure (connection complete != ok) 4589 // handle: authentication failure 4590 // handle: disconnect on done 4591 4592 hci_run(); 4593 4594 return 0; 4595 } 4596 #endif 4597 4598 void gap_set_local_name(const char * local_name){ 4599 hci_stack->local_name = local_name; 4600 } 4601 4602 4603 #ifdef ENABLE_BLE 4604 4605 #ifdef ENABLE_LE_CENTRAL 4606 void gap_start_scan(void){ 4607 hci_stack->le_scanning_enabled = 1; 4608 hci_run(); 4609 } 4610 4611 void gap_stop_scan(void){ 4612 hci_stack->le_scanning_enabled = 0; 4613 hci_run(); 4614 } 4615 4616 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4617 hci_stack->le_scan_type = scan_type; 4618 hci_stack->le_scan_interval = scan_interval; 4619 hci_stack->le_scan_window = scan_window; 4620 hci_run(); 4621 } 4622 4623 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4624 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4625 if (!conn){ 4626 log_info("gap_connect: no connection exists yet, creating context"); 4627 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4628 if (!conn){ 4629 // notify client that alloc failed 4630 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4631 log_info("gap_connect: failed to alloc hci_connection_t"); 4632 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4633 } 4634 conn->state = SEND_CREATE_CONNECTION; 4635 log_info("gap_connect: send create connection next"); 4636 hci_run(); 4637 return 0; 4638 } 4639 4640 if (!hci_is_le_connection(conn) || 4641 (conn->state == SEND_CREATE_CONNECTION) || 4642 (conn->state == SENT_CREATE_CONNECTION)) { 4643 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4644 log_error("gap_connect: classic connection or connect is already being created"); 4645 return GATT_CLIENT_IN_WRONG_STATE; 4646 } 4647 4648 log_info("gap_connect: context exists with state %u", conn->state); 4649 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4650 hci_run(); 4651 return 0; 4652 } 4653 4654 // @assumption: only a single outgoing LE Connection exists 4655 static hci_connection_t * gap_get_outgoing_connection(void){ 4656 btstack_linked_item_t *it; 4657 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4658 hci_connection_t * conn = (hci_connection_t *) it; 4659 if (!hci_is_le_connection(conn)) continue; 4660 switch (conn->state){ 4661 case SEND_CREATE_CONNECTION: 4662 case SENT_CREATE_CONNECTION: 4663 case SENT_CANCEL_CONNECTION: 4664 return conn; 4665 default: 4666 break; 4667 }; 4668 } 4669 return NULL; 4670 } 4671 4672 uint8_t gap_connect_cancel(void){ 4673 hci_connection_t * conn = gap_get_outgoing_connection(); 4674 if (!conn) return 0; 4675 switch (conn->state){ 4676 case SEND_CREATE_CONNECTION: 4677 // skip sending create connection and emit event instead 4678 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4679 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4680 btstack_memory_hci_connection_free( conn ); 4681 break; 4682 case SENT_CREATE_CONNECTION: 4683 // request to send cancel connection 4684 conn->state = SEND_CANCEL_CONNECTION; 4685 hci_run(); 4686 break; 4687 default: 4688 break; 4689 } 4690 return 0; 4691 } 4692 #endif 4693 4694 #ifdef ENABLE_LE_CENTRAL 4695 /** 4696 * @brief Set connection parameters for outgoing connections 4697 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4698 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4699 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4700 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4701 * @param conn_latency, default: 4 4702 * @param supervision_timeout (unit: 10ms), default: 720 ms 4703 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4704 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4705 */ 4706 4707 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4708 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4709 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4710 hci_stack->le_connection_scan_interval = conn_scan_interval; 4711 hci_stack->le_connection_scan_window = conn_scan_window; 4712 hci_stack->le_connection_interval_min = conn_interval_min; 4713 hci_stack->le_connection_interval_max = conn_interval_max; 4714 hci_stack->le_connection_latency = conn_latency; 4715 hci_stack->le_supervision_timeout = supervision_timeout; 4716 hci_stack->le_minimum_ce_length = min_ce_length; 4717 hci_stack->le_maximum_ce_length = max_ce_length; 4718 } 4719 #endif 4720 4721 /** 4722 * @brief Updates the connection parameters for a given LE connection 4723 * @param handle 4724 * @param conn_interval_min (unit: 1.25ms) 4725 * @param conn_interval_max (unit: 1.25ms) 4726 * @param conn_latency 4727 * @param supervision_timeout (unit: 10ms) 4728 * @returns 0 if ok 4729 */ 4730 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4731 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4732 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4733 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4734 connection->le_conn_interval_min = conn_interval_min; 4735 connection->le_conn_interval_max = conn_interval_max; 4736 connection->le_conn_latency = conn_latency; 4737 connection->le_supervision_timeout = supervision_timeout; 4738 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4739 hci_run(); 4740 return 0; 4741 } 4742 4743 /** 4744 * @brief Request an update of the connection parameter for a given LE connection 4745 * @param handle 4746 * @param conn_interval_min (unit: 1.25ms) 4747 * @param conn_interval_max (unit: 1.25ms) 4748 * @param conn_latency 4749 * @param supervision_timeout (unit: 10ms) 4750 * @returns 0 if ok 4751 */ 4752 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4753 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4754 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4755 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4756 connection->le_conn_interval_min = conn_interval_min; 4757 connection->le_conn_interval_max = conn_interval_max; 4758 connection->le_conn_latency = conn_latency; 4759 connection->le_supervision_timeout = supervision_timeout; 4760 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4761 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4762 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4763 return 0; 4764 } 4765 4766 #ifdef ENABLE_LE_PERIPHERAL 4767 4768 static void gap_advertisments_changed(void){ 4769 // disable advertisements before updating adv, scan data, or adv params 4770 if (hci_stack->le_advertisements_active){ 4771 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4772 } 4773 hci_run(); 4774 } 4775 4776 /** 4777 * @brief Set Advertisement Data 4778 * @param advertising_data_length 4779 * @param advertising_data (max 31 octets) 4780 * @note data is not copied, pointer has to stay valid 4781 */ 4782 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4783 hci_stack->le_advertisements_data_len = advertising_data_length; 4784 hci_stack->le_advertisements_data = advertising_data; 4785 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4786 gap_advertisments_changed(); 4787 } 4788 4789 /** 4790 * @brief Set Scan Response Data 4791 * @param advertising_data_length 4792 * @param advertising_data (max 31 octets) 4793 * @note data is not copied, pointer has to stay valid 4794 */ 4795 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4796 hci_stack->le_scan_response_data_len = scan_response_data_length; 4797 hci_stack->le_scan_response_data = scan_response_data; 4798 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4799 gap_advertisments_changed(); 4800 } 4801 4802 /** 4803 * @brief Set Advertisement Parameters 4804 * @param adv_int_min 4805 * @param adv_int_max 4806 * @param adv_type 4807 * @param direct_address_type 4808 * @param direct_address 4809 * @param channel_map 4810 * @param filter_policy 4811 * 4812 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4813 */ 4814 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4815 uint8_t direct_address_typ, bd_addr_t direct_address, 4816 uint8_t channel_map, uint8_t filter_policy) { 4817 4818 hci_stack->le_advertisements_interval_min = adv_int_min; 4819 hci_stack->le_advertisements_interval_max = adv_int_max; 4820 hci_stack->le_advertisements_type = adv_type; 4821 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4822 hci_stack->le_advertisements_channel_map = channel_map; 4823 hci_stack->le_advertisements_filter_policy = filter_policy; 4824 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4825 6); 4826 4827 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4828 gap_advertisments_changed(); 4829 } 4830 4831 /** 4832 * @brief Enable/Disable Advertisements 4833 * @param enabled 4834 */ 4835 void gap_advertisements_enable(int enabled){ 4836 hci_stack->le_advertisements_enabled = enabled; 4837 if (enabled && !hci_stack->le_advertisements_active){ 4838 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4839 } 4840 if (!enabled && hci_stack->le_advertisements_active){ 4841 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4842 } 4843 hci_run(); 4844 } 4845 4846 #endif 4847 4848 void hci_le_set_own_address_type(uint8_t own_address_type){ 4849 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4850 if (own_address_type == hci_stack->le_own_addr_type) return; 4851 hci_stack->le_own_addr_type = own_address_type; 4852 4853 #ifdef ENABLE_LE_PERIPHERAL 4854 // update advertisement parameters, too 4855 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4856 gap_advertisments_changed(); 4857 #endif 4858 #ifdef ENABLE_LE_CENTRAL 4859 // note: we don't update scan parameters or modify ongoing connection attempts 4860 #endif 4861 } 4862 4863 #endif 4864 4865 uint8_t gap_disconnect(hci_con_handle_t handle){ 4866 hci_connection_t * conn = hci_connection_for_handle(handle); 4867 if (!conn){ 4868 hci_emit_disconnection_complete(handle, 0); 4869 return 0; 4870 } 4871 // ignore if already disconnected 4872 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4873 return 0; 4874 } 4875 conn->state = SEND_DISCONNECT; 4876 hci_run(); 4877 return 0; 4878 } 4879 4880 int gap_read_rssi(hci_con_handle_t con_handle){ 4881 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4882 if (hci_connection == NULL) return 0; 4883 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4884 hci_run(); 4885 return 1; 4886 } 4887 4888 /** 4889 * @brief Get connection type 4890 * @param con_handle 4891 * @result connection_type 4892 */ 4893 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4894 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4895 if (!conn) return GAP_CONNECTION_INVALID; 4896 switch (conn->address_type){ 4897 case BD_ADDR_TYPE_LE_PUBLIC: 4898 case BD_ADDR_TYPE_LE_RANDOM: 4899 return GAP_CONNECTION_LE; 4900 case BD_ADDR_TYPE_SCO: 4901 return GAP_CONNECTION_SCO; 4902 case BD_ADDR_TYPE_ACL: 4903 return GAP_CONNECTION_ACL; 4904 default: 4905 return GAP_CONNECTION_INVALID; 4906 } 4907 } 4908 4909 #ifdef ENABLE_BLE 4910 4911 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){ 4912 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4913 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4914 4915 conn->le_phy_update_all_phys = all_phys; 4916 conn->le_phy_update_tx_phys = tx_phys; 4917 conn->le_phy_update_rx_phys = rx_phys; 4918 conn->le_phy_update_phy_options = phy_options; 4919 4920 hci_run(); 4921 4922 return 0; 4923 } 4924 4925 #ifdef ENABLE_LE_CENTRAL 4926 /** 4927 * @brief Auto Connection Establishment - Start Connecting to device 4928 * @param address_typ 4929 * @param address 4930 * @returns 0 if ok 4931 */ 4932 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4933 // check capacity 4934 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4935 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4936 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4937 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4938 entry->address_type = address_type; 4939 (void)memcpy(entry->address, address, 6); 4940 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4941 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4942 hci_run(); 4943 return 0; 4944 } 4945 4946 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4947 btstack_linked_list_iterator_t it; 4948 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4949 while (btstack_linked_list_iterator_has_next(&it)){ 4950 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4951 if (entry->address_type != address_type) continue; 4952 if (memcmp(entry->address, address, 6) != 0) continue; 4953 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4954 // remove from controller if already present 4955 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4956 continue; 4957 } 4958 // direclty remove entry from whitelist 4959 btstack_linked_list_iterator_remove(&it); 4960 btstack_memory_whitelist_entry_free(entry); 4961 } 4962 } 4963 4964 /** 4965 * @brief Auto Connection Establishment - Stop Connecting to device 4966 * @param address_typ 4967 * @param address 4968 * @returns 0 if ok 4969 */ 4970 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4971 hci_remove_from_whitelist(address_type, address); 4972 hci_run(); 4973 return 0; 4974 } 4975 4976 /** 4977 * @brief Auto Connection Establishment - Stop everything 4978 * @note Convenience function to stop all active auto connection attempts 4979 */ 4980 void gap_auto_connection_stop_all(void){ 4981 btstack_linked_list_iterator_t it; 4982 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4983 while (btstack_linked_list_iterator_has_next(&it)){ 4984 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4985 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4986 // remove from controller if already present 4987 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4988 continue; 4989 } 4990 // directly remove entry from whitelist 4991 btstack_linked_list_iterator_remove(&it); 4992 btstack_memory_whitelist_entry_free(entry); 4993 } 4994 hci_run(); 4995 } 4996 4997 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4998 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4999 if (!conn) return 0; 5000 return conn->le_connection_interval; 5001 } 5002 #endif 5003 #endif 5004 5005 #ifdef ENABLE_CLASSIC 5006 /** 5007 * @brief Set Extended Inquiry Response data 5008 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 5009 * @note has to be done before stack starts up 5010 */ 5011 void gap_set_extended_inquiry_response(const uint8_t * data){ 5012 hci_stack->eir_data = data; 5013 } 5014 5015 /** 5016 * @brief Start GAP Classic Inquiry 5017 * @param duration in 1.28s units 5018 * @return 0 if ok 5019 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5020 */ 5021 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5022 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5023 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5024 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5025 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5026 } 5027 hci_stack->inquiry_state = duration_in_1280ms_units; 5028 hci_run(); 5029 return 0; 5030 } 5031 5032 /** 5033 * @brief Stop GAP Classic Inquiry 5034 * @returns 0 if ok 5035 */ 5036 int gap_inquiry_stop(void){ 5037 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5038 // emit inquiry complete event, before it even started 5039 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5040 hci_emit_event(event, sizeof(event), 1); 5041 return 0; 5042 } 5043 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5044 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5045 hci_run(); 5046 return 0; 5047 } 5048 5049 5050 /** 5051 * @brief Remote Name Request 5052 * @param addr 5053 * @param page_scan_repetition_mode 5054 * @param clock_offset only used when bit 15 is set 5055 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5056 */ 5057 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5058 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5059 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5060 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5061 hci_stack->remote_name_clock_offset = clock_offset; 5062 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5063 hci_run(); 5064 return 0; 5065 } 5066 5067 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5068 hci_stack->gap_pairing_state = state; 5069 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5070 hci_run(); 5071 return 0; 5072 } 5073 5074 /** 5075 * @brief Legacy Pairing Pin Code Response 5076 * @param addr 5077 * @param pin 5078 * @return 0 if ok 5079 */ 5080 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5081 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5082 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5083 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5084 } 5085 5086 /** 5087 * @brief Abort Legacy Pairing 5088 * @param addr 5089 * @param pin 5090 * @return 0 if ok 5091 */ 5092 int gap_pin_code_negative(bd_addr_t addr){ 5093 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5094 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5095 } 5096 5097 /** 5098 * @brief SSP Passkey Response 5099 * @param addr 5100 * @param passkey 5101 * @return 0 if ok 5102 */ 5103 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5104 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5105 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5106 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5107 } 5108 5109 /** 5110 * @brief Abort SSP Passkey Entry/Pairing 5111 * @param addr 5112 * @param pin 5113 * @return 0 if ok 5114 */ 5115 int gap_ssp_passkey_negative(bd_addr_t addr){ 5116 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5117 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5118 } 5119 5120 /** 5121 * @brief Accept SSP Numeric Comparison 5122 * @param addr 5123 * @param passkey 5124 * @return 0 if ok 5125 */ 5126 int gap_ssp_confirmation_response(bd_addr_t addr){ 5127 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5128 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5129 } 5130 5131 /** 5132 * @brief Abort SSP Numeric Comparison/Pairing 5133 * @param addr 5134 * @param pin 5135 * @return 0 if ok 5136 */ 5137 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5138 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5139 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5140 } 5141 5142 /** 5143 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5144 * @param inquiry_mode see bluetooth_defines.h 5145 */ 5146 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5147 hci_stack->inquiry_mode = mode; 5148 } 5149 5150 /** 5151 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5152 */ 5153 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5154 hci_stack->sco_voice_setting = voice_setting; 5155 } 5156 5157 /** 5158 * @brief Get SCO Voice Setting 5159 * @return current voice setting 5160 */ 5161 uint16_t hci_get_sco_voice_setting(void){ 5162 return hci_stack->sco_voice_setting; 5163 } 5164 5165 static int hci_have_usb_transport(void){ 5166 if (!hci_stack->hci_transport) return 0; 5167 const char * transport_name = hci_stack->hci_transport->name; 5168 if (!transport_name) return 0; 5169 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5170 } 5171 5172 /** @brief Get SCO packet length for current SCO Voice setting 5173 * @note Using SCO packets of the exact length is required for USB transfer 5174 * @return Length of SCO packets in bytes (not audio frames) 5175 */ 5176 int hci_get_sco_packet_length(void){ 5177 int sco_packet_length = 0; 5178 5179 #ifdef ENABLE_SCO_OVER_HCI 5180 5181 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5182 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5183 5184 if (hci_have_usb_transport()){ 5185 // see Core Spec for H2 USB Transfer. 5186 // 3 byte SCO header + 24 bytes per connection 5187 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5188 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5189 } else { 5190 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5191 sco_packet_length = 3 + 60 * multiplier; 5192 // assert that it still fits inside an SCO buffer 5193 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5194 sco_packet_length = 3 + 60; 5195 } 5196 } 5197 #endif 5198 return sco_packet_length; 5199 } 5200 5201 /** 5202 * @brief Sets the master/slave policy 5203 * @param policy (0: attempt to become master, 1: let connecting device decide) 5204 */ 5205 void hci_set_master_slave_policy(uint8_t policy){ 5206 hci_stack->master_slave_policy = policy; 5207 } 5208 5209 #endif 5210 5211 HCI_STATE hci_get_state(void){ 5212 return hci_stack->state; 5213 } 5214 5215 #ifdef ENABLE_CLASSIC 5216 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5217 hci_stack->gap_classic_accept_callback = accept_callback; 5218 } 5219 #endif 5220 5221 /** 5222 * @brief Set callback for Bluetooth Hardware Error 5223 */ 5224 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5225 hci_stack->hardware_error_callback = fn; 5226 } 5227 5228 void hci_disconnect_all(void){ 5229 btstack_linked_list_iterator_t it; 5230 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5231 while (btstack_linked_list_iterator_has_next(&it)){ 5232 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5233 if (con->state == SENT_DISCONNECT) continue; 5234 con->state = SEND_DISCONNECT; 5235 } 5236 hci_run(); 5237 } 5238 5239 uint16_t hci_get_manufacturer(void){ 5240 return hci_stack->manufacturer; 5241 } 5242 5243 #ifdef ENABLE_BLE 5244 5245 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5246 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5247 if (!hci_con) return NULL; 5248 return &hci_con->sm_connection; 5249 } 5250 5251 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5252 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5253 5254 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5255 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5256 if (hci_connection == NULL) return 0; 5257 if (hci_is_le_connection(hci_connection)){ 5258 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5259 if (sm_conn->sm_connection_encrypted) { 5260 return sm_conn->sm_actual_encryption_key_size; 5261 } 5262 } 5263 #ifdef ENABLE_CLASSIC 5264 else { 5265 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5266 return hci_connection->encryption_key_size; 5267 } 5268 } 5269 #endif 5270 return 0; 5271 } 5272 5273 int gap_authenticated(hci_con_handle_t con_handle){ 5274 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5275 if (hci_connection == NULL) return 0; 5276 5277 switch (hci_connection->address_type){ 5278 case BD_ADDR_TYPE_LE_PUBLIC: 5279 case BD_ADDR_TYPE_LE_RANDOM: 5280 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5281 return hci_connection->sm_connection.sm_connection_authenticated; 5282 #ifdef ENABLE_CLASSIC 5283 case BD_ADDR_TYPE_SCO: 5284 case BD_ADDR_TYPE_ACL: 5285 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5286 #endif 5287 default: 5288 return 0; 5289 } 5290 } 5291 5292 int gap_secure_connection(hci_con_handle_t con_handle){ 5293 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5294 if (hci_connection == NULL) return 0; 5295 5296 switch (hci_connection->address_type){ 5297 case BD_ADDR_TYPE_LE_PUBLIC: 5298 case BD_ADDR_TYPE_LE_RANDOM: 5299 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5300 return hci_connection->sm_connection.sm_connection_sc; 5301 #ifdef ENABLE_CLASSIC 5302 case BD_ADDR_TYPE_SCO: 5303 case BD_ADDR_TYPE_ACL: 5304 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5305 #endif 5306 default: 5307 return 0; 5308 } 5309 } 5310 5311 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5312 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5313 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5314 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5315 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5316 return sm_conn->sm_connection_authorization_state; 5317 } 5318 #endif 5319 5320 #ifdef ENABLE_CLASSIC 5321 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){ 5322 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5323 if (!conn) return GAP_CONNECTION_INVALID; 5324 conn->sniff_min_interval = sniff_min_interval; 5325 conn->sniff_max_interval = sniff_max_interval; 5326 conn->sniff_attempt = sniff_attempt; 5327 conn->sniff_timeout = sniff_timeout; 5328 hci_run(); 5329 return 0; 5330 } 5331 5332 /** 5333 * @brief Exit Sniff mode 5334 * @param con_handle 5335 @ @return 0 if ok 5336 */ 5337 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5338 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5339 if (!conn) return GAP_CONNECTION_INVALID; 5340 conn->sniff_min_interval = 0xffff; 5341 hci_run(); 5342 return 0; 5343 } 5344 #endif 5345 5346 void hci_halting_defer(void){ 5347 if (hci_stack->state != HCI_STATE_HALTING) return; 5348 switch (hci_stack->substate){ 5349 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5350 case HCI_HALTING_CLOSE: 5351 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5352 break; 5353 default: 5354 break; 5355 } 5356 } 5357 5358 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5359 void hci_setup_test_connections_fuzz(void){ 5360 hci_connection_t * conn; 5361 5362 // default address: 66:55:44:33:00:01 5363 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5364 5365 // setup Controller info 5366 hci_stack->num_cmd_packets = 255; 5367 hci_stack->acl_packets_total_num = 255; 5368 5369 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5370 addr[5] = 0x01; 5371 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5372 conn->con_handle = addr[5]; 5373 conn->role = HCI_ROLE_SLAVE; 5374 conn->state = RECEIVED_CONNECTION_REQUEST; 5375 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5376 5377 // setup incoming Classic SCO connection with con handle 0x0002 5378 addr[5] = 0x02; 5379 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5380 conn->con_handle = addr[5]; 5381 conn->role = HCI_ROLE_SLAVE; 5382 conn->state = RECEIVED_CONNECTION_REQUEST; 5383 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5384 5385 // setup ready Classic ACL connection with con handle 0x0003 5386 addr[5] = 0x03; 5387 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5388 conn->con_handle = addr[5]; 5389 conn->role = HCI_ROLE_SLAVE; 5390 conn->state = OPEN; 5391 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5392 5393 // setup ready Classic SCO connection with con handle 0x0004 5394 addr[5] = 0x04; 5395 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5396 conn->con_handle = addr[5]; 5397 conn->role = HCI_ROLE_SLAVE; 5398 conn->state = OPEN; 5399 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5400 5401 // setup ready LE ACL connection with con handle 0x005 and public address 5402 addr[5] = 0x05; 5403 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5404 conn->con_handle = addr[5]; 5405 conn->role = HCI_ROLE_SLAVE; 5406 conn->state = OPEN; 5407 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5408 } 5409 5410 void hci_free_connections_fuzz(void){ 5411 btstack_linked_list_iterator_t it; 5412 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5413 while (btstack_linked_list_iterator_has_next(&it)){ 5414 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5415 btstack_linked_list_iterator_remove(&it); 5416 btstack_memory_hci_connection_free(con); 5417 } 5418 } 5419 void hci_simulate_working_fuzz(void){ 5420 hci_init_done(); 5421 hci_stack->num_cmd_packets = 255; 5422 } 5423 #endif 5424