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 uint16_t bcm_delay_ms = 300; 1338 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1339 // -> Work around: wait here. 1340 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1341 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1342 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1343 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1344 btstack_run_loop_add_timer(&hci_stack->timeout); 1345 break; 1346 } 1347 } 1348 // otherwise continue 1349 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1350 hci_send_cmd(&hci_read_local_supported_commands); 1351 break; 1352 case HCI_INIT_SET_BD_ADDR: 1353 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1354 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1355 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1356 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1357 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1358 break; 1359 #endif 1360 1361 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1362 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1363 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1364 hci_send_cmd(&hci_read_local_supported_commands); 1365 break; 1366 case HCI_INIT_READ_BD_ADDR: 1367 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1368 hci_send_cmd(&hci_read_bd_addr); 1369 break; 1370 case HCI_INIT_READ_BUFFER_SIZE: 1371 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1372 hci_send_cmd(&hci_read_buffer_size); 1373 break; 1374 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1375 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1376 hci_send_cmd(&hci_read_local_supported_features); 1377 break; 1378 1379 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1380 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1381 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1382 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1383 break; 1384 case HCI_INIT_HOST_BUFFER_SIZE: 1385 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1386 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1387 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1388 break; 1389 #endif 1390 1391 case HCI_INIT_SET_EVENT_MASK: 1392 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1393 if (hci_le_supported()){ 1394 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1395 } else { 1396 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1397 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1398 } 1399 break; 1400 1401 #ifdef ENABLE_CLASSIC 1402 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1404 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1405 break; 1406 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1408 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1409 break; 1410 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1411 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1412 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1413 break; 1414 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1415 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1416 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1417 break; 1418 case HCI_INIT_WRITE_LOCAL_NAME: { 1419 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1420 hci_reserve_packet_buffer(); 1421 uint8_t * packet = hci_stack->hci_packet_buffer; 1422 // construct HCI Command and send 1423 uint16_t opcode = hci_write_local_name.opcode; 1424 hci_stack->last_cmd_opcode = opcode; 1425 packet[0] = opcode & 0xff; 1426 packet[1] = opcode >> 8; 1427 packet[2] = DEVICE_NAME_LEN; 1428 memset(&packet[3], 0, DEVICE_NAME_LEN); 1429 (void)memcpy(&packet[3], hci_stack->local_name, 1430 strlen(hci_stack->local_name)); 1431 // expand '00:00:00:00:00:00' in name with bd_addr 1432 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1433 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1434 break; 1435 } 1436 case HCI_INIT_WRITE_EIR_DATA: { 1437 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1438 hci_reserve_packet_buffer(); 1439 uint8_t * packet = hci_stack->hci_packet_buffer; 1440 // construct HCI Command and send 1441 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1442 hci_stack->last_cmd_opcode = opcode; 1443 packet[0] = opcode & 0xff; 1444 packet[1] = opcode >> 8; 1445 packet[2] = 1 + 240; 1446 packet[3] = 0; // FEC not required 1447 if (hci_stack->eir_data){ 1448 (void)memcpy(&packet[4], hci_stack->eir_data, 240); 1449 } else { 1450 memset(&packet[4], 0, 240); 1451 int name_len = strlen(hci_stack->local_name); 1452 packet[4] = name_len + 1; 1453 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1454 (void)memcpy(&packet[6], hci_stack->local_name, name_len); 1455 } 1456 // expand '00:00:00:00:00:00' in name with bd_addr 1457 hci_replace_bd_addr_placeholder(&packet[4], 240); 1458 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1459 break; 1460 } 1461 case HCI_INIT_WRITE_INQUIRY_MODE: 1462 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1463 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1464 break; 1465 case HCI_INIT_WRITE_SCAN_ENABLE: 1466 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1467 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1468 break; 1469 // only sent if ENABLE_SCO_OVER_HCI is defined 1470 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1471 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1472 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1473 break; 1474 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1475 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1476 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1477 break; 1478 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1479 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1480 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1481 log_info("BCM: Route SCO data via HCI transport"); 1482 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1483 break; 1484 1485 #endif 1486 #ifdef ENABLE_BLE 1487 // LE INIT 1488 case HCI_INIT_LE_READ_BUFFER_SIZE: 1489 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1490 hci_send_cmd(&hci_le_read_buffer_size); 1491 break; 1492 case HCI_INIT_LE_SET_EVENT_MASK: 1493 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1494 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1495 break; 1496 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1497 // LE Supported Host = 1, Simultaneous Host = 0 1498 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1499 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1500 break; 1501 #endif 1502 1503 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1504 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1505 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1506 hci_send_cmd(&hci_le_read_maximum_data_length); 1507 break; 1508 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1509 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1510 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1511 break; 1512 #endif 1513 1514 #ifdef ENABLE_LE_CENTRAL 1515 case HCI_INIT_READ_WHITE_LIST_SIZE: 1516 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1517 hci_send_cmd(&hci_le_read_white_list_size); 1518 break; 1519 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1520 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1521 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1522 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); 1523 break; 1524 #endif 1525 default: 1526 return; 1527 } 1528 } 1529 1530 static void hci_init_done(void){ 1531 // done. tell the app 1532 log_info("hci_init_done -> HCI_STATE_WORKING"); 1533 hci_stack->state = HCI_STATE_WORKING; 1534 hci_emit_state(); 1535 hci_run(); 1536 } 1537 1538 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1539 1540 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1541 1542 uint8_t command_completed = 0; 1543 1544 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1545 uint16_t opcode = little_endian_read_16(packet,3); 1546 if (opcode == hci_stack->last_cmd_opcode){ 1547 command_completed = 1; 1548 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1549 } else { 1550 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1551 } 1552 } 1553 1554 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1555 uint8_t status = packet[2]; 1556 uint16_t opcode = little_endian_read_16(packet,4); 1557 if (opcode == hci_stack->last_cmd_opcode){ 1558 if (status){ 1559 command_completed = 1; 1560 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1561 } else { 1562 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1563 } 1564 } else { 1565 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1566 } 1567 } 1568 1569 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1570 1571 // Vendor == CSR 1572 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1573 // TODO: track actual command 1574 command_completed = 1; 1575 } 1576 1577 // Vendor == Toshiba 1578 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1579 // TODO: track actual command 1580 command_completed = 1; 1581 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1582 hci_stack->num_cmd_packets = 1; 1583 } 1584 1585 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1586 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1587 // 1588 // HCI Reset 1589 // Timeout 100 ms 1590 // HCI Reset 1591 // Command Complete Reset 1592 // HCI Read Local Version Information 1593 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1594 // hang... 1595 // 1596 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1597 if (!command_completed 1598 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1599 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1600 1601 uint16_t opcode = little_endian_read_16(packet,3); 1602 if (opcode == hci_reset.opcode){ 1603 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1604 return; 1605 } 1606 } 1607 1608 // CSR & H5 1609 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1610 if (!command_completed 1611 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1612 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1613 1614 uint16_t opcode = little_endian_read_16(packet,3); 1615 if (opcode == hci_reset.opcode){ 1616 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1617 return; 1618 } 1619 } 1620 1621 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1622 // fix: Correct substate and behave as command below 1623 if (command_completed){ 1624 switch (hci_stack->substate){ 1625 case HCI_INIT_SEND_RESET: 1626 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1627 break; 1628 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1629 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1630 break; 1631 default: 1632 break; 1633 } 1634 } 1635 1636 #endif 1637 1638 if (!command_completed) return; 1639 1640 int need_baud_change = 0; 1641 int need_addr_change = 0; 1642 1643 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1644 need_baud_change = hci_stack->config 1645 && hci_stack->chipset 1646 && hci_stack->chipset->set_baudrate_command 1647 && hci_stack->hci_transport->set_baudrate 1648 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1649 1650 need_addr_change = hci_stack->custom_bd_addr_set 1651 && hci_stack->chipset 1652 && hci_stack->chipset->set_bd_addr_command; 1653 #endif 1654 1655 switch(hci_stack->substate){ 1656 1657 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1658 case HCI_INIT_SEND_RESET: 1659 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1660 // fix: just correct substate and behave as command below 1661 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1662 btstack_run_loop_remove_timer(&hci_stack->timeout); 1663 break; 1664 case HCI_INIT_W4_SEND_RESET: 1665 btstack_run_loop_remove_timer(&hci_stack->timeout); 1666 break; 1667 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1668 log_info("Received local name, need baud change %d", need_baud_change); 1669 if (need_baud_change){ 1670 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1671 return; 1672 } 1673 // skip baud change 1674 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1675 return; 1676 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1677 // for STLC2500D, baud rate change already happened. 1678 // for others, baud rate gets changed now 1679 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1680 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1681 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1682 hci_stack->hci_transport->set_baudrate(baud_rate); 1683 } 1684 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1685 return; 1686 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1687 btstack_run_loop_remove_timer(&hci_stack->timeout); 1688 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1689 return; 1690 case HCI_INIT_W4_CUSTOM_INIT: 1691 // repeat custom init 1692 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1693 return; 1694 #else 1695 case HCI_INIT_W4_SEND_RESET: 1696 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1697 return ; 1698 #endif 1699 1700 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1701 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1702 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1703 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1704 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1705 return; 1706 } 1707 if (need_addr_change){ 1708 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1709 return; 1710 } 1711 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1712 return; 1713 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1714 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1715 if (need_baud_change){ 1716 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1717 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1718 hci_stack->hci_transport->set_baudrate(baud_rate); 1719 } 1720 if (need_addr_change){ 1721 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1722 return; 1723 } 1724 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1725 return; 1726 case HCI_INIT_W4_SET_BD_ADDR: 1727 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1728 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1729 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1730 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1731 return; 1732 } 1733 // skipping st warm boot 1734 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1735 return; 1736 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1737 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1738 return; 1739 #endif 1740 case HCI_INIT_W4_READ_BD_ADDR: 1741 // only read buffer size if supported 1742 if (hci_stack->local_supported_commands[0] & 0x01) { 1743 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1744 return; 1745 } 1746 // skipping read buffer size 1747 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1748 return; 1749 case HCI_INIT_W4_SET_EVENT_MASK: 1750 // skip Classic init commands for LE only chipsets 1751 if (!hci_classic_supported()){ 1752 #ifdef ENABLE_BLE 1753 if (hci_le_supported()){ 1754 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1755 return; 1756 } 1757 #endif 1758 log_error("Neither BR/EDR nor LE supported"); 1759 hci_init_done(); 1760 return; 1761 } 1762 if (!gap_ssp_supported()){ 1763 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1764 return; 1765 } 1766 break; 1767 #ifdef ENABLE_BLE 1768 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1769 // skip write le host if not supported (e.g. on LE only EM9301) 1770 if (hci_stack->local_supported_commands[0] & 0x02) break; 1771 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1772 return; 1773 1774 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1775 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1776 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1777 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1778 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1779 return; 1780 } 1781 // explicit fall through to reduce repetitions 1782 1783 #ifdef ENABLE_LE_CENTRAL 1784 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1785 #else 1786 hci_init_done(); 1787 #endif 1788 return; 1789 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1790 1791 #endif /* ENABLE_BLE */ 1792 1793 #ifdef ENABLE_SCO_OVER_HCI 1794 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1795 // skip write synchronous flow control if not supported 1796 if (hci_stack->local_supported_commands[0] & 0x04) break; 1797 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1798 1799 /* fall through */ 1800 1801 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1802 // skip write default erroneous data reporting if not supported 1803 if (hci_stack->local_supported_commands[0] & 0x08) break; 1804 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1805 1806 /* fall through */ 1807 1808 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1809 // skip bcm set sco pcm config on non-Broadcom chipsets 1810 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1811 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1812 1813 /* fall through */ 1814 1815 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1816 if (!hci_le_supported()){ 1817 // SKIP LE init for Classic only configuration 1818 hci_init_done(); 1819 return; 1820 } 1821 break; 1822 1823 #else /* !ENABLE_SCO_OVER_HCI */ 1824 1825 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1826 #ifdef ENABLE_BLE 1827 if (hci_le_supported()){ 1828 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1829 return; 1830 } 1831 #endif 1832 // SKIP LE init for Classic only configuration 1833 hci_init_done(); 1834 return; 1835 #endif /* ENABLE_SCO_OVER_HCI */ 1836 1837 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1838 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1839 // Response to command before init done state -> init done 1840 case (HCI_INIT_DONE-1): 1841 hci_init_done(); 1842 return; 1843 #endif 1844 1845 default: 1846 break; 1847 } 1848 hci_initializing_next_state(); 1849 } 1850 1851 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1852 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1853 bd_addr_t bd_address; 1854 (void)memcpy(&bd_address, conn->address, 6); 1855 1856 #ifdef ENABLE_CLASSIC 1857 // cache needed data 1858 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1859 #endif 1860 1861 // connection failed, remove entry 1862 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1863 btstack_memory_hci_connection_free( conn ); 1864 1865 #ifdef ENABLE_CLASSIC 1866 // notify client if dedicated bonding 1867 if (notify_dedicated_bonding_failed){ 1868 log_info("hci notify_dedicated_bonding_failed"); 1869 hci_emit_dedicated_bonding_result(bd_address, status); 1870 } 1871 1872 // if authentication error, also delete link key 1873 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1874 gap_drop_link_key_for_bd_addr(bd_address); 1875 } 1876 #endif 1877 } 1878 1879 static void event_handler(uint8_t *packet, int size){ 1880 1881 uint16_t event_length = packet[1]; 1882 1883 // assert packet is complete 1884 if (size != (event_length + 2)){ 1885 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1886 return; 1887 } 1888 1889 bd_addr_t addr; 1890 bd_addr_type_t addr_type; 1891 hci_con_handle_t handle; 1892 hci_connection_t * conn; 1893 int i; 1894 int create_connection_cmd; 1895 1896 #ifdef ENABLE_CLASSIC 1897 uint8_t link_type; 1898 #endif 1899 1900 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1901 1902 switch (hci_event_packet_get_type(packet)) { 1903 1904 case HCI_EVENT_COMMAND_COMPLETE: 1905 // get num cmd packets - limit to 1 to reduce complexity 1906 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1907 1908 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1909 if (packet[5]) break; 1910 // terminate, name 248 chars 1911 packet[6+248] = 0; 1912 log_info("local name: %s", &packet[6]); 1913 } 1914 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1915 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1916 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1917 uint16_t acl_len = little_endian_read_16(packet, 6); 1918 uint16_t sco_len = packet[8]; 1919 1920 // determine usable ACL/SCO payload size 1921 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1922 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1923 1924 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1925 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1926 1927 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1928 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1929 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1930 } 1931 } 1932 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1933 if (packet[5] == 0){ 1934 uint8_t event[5]; 1935 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1936 event[1] = 3; 1937 (void)memcpy(&event[2], &packet[6], 3); 1938 hci_emit_event(event, sizeof(event), 1); 1939 } 1940 } 1941 #ifdef ENABLE_BLE 1942 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1943 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1944 hci_stack->le_acl_packets_total_num = packet[8]; 1945 // determine usable ACL payload size 1946 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1947 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1948 } 1949 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1950 } 1951 #endif 1952 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1953 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1954 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1955 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1956 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); 1957 } 1958 #endif 1959 #ifdef ENABLE_LE_CENTRAL 1960 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1961 hci_stack->le_whitelist_capacity = packet[6]; 1962 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1963 } 1964 #endif 1965 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1966 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1967 hci_stack->local_bd_addr); 1968 log_info("Local Address, Status: 0x%02x: Addr: %s", 1969 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1970 #ifdef ENABLE_CLASSIC 1971 if (hci_stack->link_key_db){ 1972 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1973 } 1974 #endif 1975 } 1976 #ifdef ENABLE_CLASSIC 1977 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1978 hci_emit_discoverable_enabled(hci_stack->discoverable); 1979 } 1980 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1981 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1982 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1983 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1984 hci_emit_event(event, sizeof(event), 1); 1985 } 1986 } 1987 #endif 1988 1989 // Note: HCI init checks 1990 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1991 (void)memcpy(hci_stack->local_supported_features, 1992 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1993 8); 1994 1995 #ifdef ENABLE_CLASSIC 1996 // determine usable ACL packet types based on host buffer size and supported features 1997 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1998 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1999 #endif 2000 // Classic/LE 2001 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2002 } 2003 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2004 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2005 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2006 uint16_t manufacturer = little_endian_read_16(packet, 10); 2007 // map Cypress to Broadcom 2008 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2009 log_info("Treat Cypress as Broadcom"); 2010 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2011 little_endian_store_16(packet, 10, manufacturer); 2012 } 2013 hci_stack->manufacturer = manufacturer; 2014 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2015 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2016 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2017 } 2018 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2019 hci_stack->local_supported_commands[0] = 2020 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2021 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2022 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2023 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2024 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2025 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2026 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2027 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2028 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2029 } 2030 #ifdef ENABLE_CLASSIC 2031 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2032 if (packet[5] == 0){ 2033 hci_stack->synchronous_flow_control_enabled = 1; 2034 } 2035 } 2036 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2037 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2038 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2039 conn = hci_connection_for_handle(handle); 2040 if (!conn) break; 2041 if (status == 0){ 2042 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2043 log_info("Handle %x04x key Size: %u", handle, key_size); 2044 conn->encryption_key_size = key_size; 2045 } else { 2046 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2047 conn->encryption_key_size = 1; 2048 } 2049 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2050 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2051 } 2052 #endif 2053 break; 2054 2055 case HCI_EVENT_COMMAND_STATUS: 2056 // get num cmd packets - limit to 1 to reduce complexity 2057 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2058 2059 // check command status to detected failed outgoing connections 2060 create_connection_cmd = 0; 2061 #ifdef ENABLE_CLASSIC 2062 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2063 create_connection_cmd = 1; 2064 } 2065 #endif 2066 #ifdef ENABLE_LE_CENTRAL 2067 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2068 create_connection_cmd = 1; 2069 } 2070 #endif 2071 if (create_connection_cmd) { 2072 uint8_t status = hci_event_command_status_get_status(packet); 2073 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2074 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); 2075 2076 // reset outgoing address info 2077 memset(hci_stack->outgoing_addr, 0, 6); 2078 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2079 2080 // error => outgoing connection failed 2081 if ((conn != NULL) && (status != 0)){ 2082 hci_handle_connection_failed(conn, status); 2083 } 2084 } 2085 break; 2086 2087 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2088 if (size < 3) return; 2089 uint16_t num_handles = packet[2]; 2090 if (size != (3 + num_handles * 4)) return; 2091 uint16_t offset = 3; 2092 for (i=0; i<num_handles;i++){ 2093 handle = little_endian_read_16(packet, offset) & 0x0fff; 2094 offset += 2; 2095 uint16_t num_packets = little_endian_read_16(packet, offset); 2096 offset += 2; 2097 2098 conn = hci_connection_for_handle(handle); 2099 if (!conn){ 2100 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2101 continue; 2102 } 2103 2104 if (conn->num_packets_sent >= num_packets){ 2105 conn->num_packets_sent -= num_packets; 2106 } else { 2107 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2108 conn->num_packets_sent = 0; 2109 } 2110 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2111 2112 #ifdef ENABLE_CLASSIC 2113 // For SCO, we do the can_send_now_check here 2114 hci_notify_if_sco_can_send_now(); 2115 #endif 2116 } 2117 break; 2118 } 2119 2120 #ifdef ENABLE_CLASSIC 2121 case HCI_EVENT_INQUIRY_COMPLETE: 2122 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2123 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2124 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2125 hci_emit_event(event, sizeof(event), 1); 2126 } 2127 break; 2128 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2129 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2130 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2131 } 2132 break; 2133 case HCI_EVENT_CONNECTION_REQUEST: 2134 reverse_bd_addr(&packet[2], addr); 2135 if (hci_stack->gap_classic_accept_callback != NULL){ 2136 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2137 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2138 bd_addr_copy(hci_stack->decline_addr, addr); 2139 break; 2140 } 2141 } 2142 2143 // TODO: eval COD 8-10 2144 link_type = packet[11]; 2145 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2146 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2147 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2148 if (!conn) { 2149 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2150 } 2151 if (!conn) { 2152 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2153 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2154 bd_addr_copy(hci_stack->decline_addr, addr); 2155 break; 2156 } 2157 conn->role = HCI_ROLE_SLAVE; 2158 conn->state = RECEIVED_CONNECTION_REQUEST; 2159 // store info about eSCO 2160 if (link_type == 0x02){ 2161 conn->remote_supported_feature_eSCO = 1; 2162 } 2163 hci_run(); 2164 break; 2165 2166 case HCI_EVENT_CONNECTION_COMPLETE: 2167 // Connection management 2168 reverse_bd_addr(&packet[5], addr); 2169 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2170 addr_type = BD_ADDR_TYPE_ACL; 2171 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2172 if (conn) { 2173 if (!packet[2]){ 2174 conn->state = OPEN; 2175 conn->con_handle = little_endian_read_16(packet, 3); 2176 2177 // queue get remote feature 2178 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2179 2180 // queue set supervision timeout if we're master 2181 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2182 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2183 } 2184 2185 // restart timer 2186 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2187 btstack_run_loop_add_timer(&conn->timeout); 2188 2189 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2190 2191 hci_emit_nr_connections_changed(); 2192 } else { 2193 // connection failed 2194 hci_handle_connection_failed(conn, packet[2]); 2195 } 2196 } 2197 break; 2198 2199 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2200 reverse_bd_addr(&packet[5], addr); 2201 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2202 if (packet[2]){ 2203 // connection failed 2204 break; 2205 } 2206 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2207 if (!conn) { 2208 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2209 } 2210 if (!conn) { 2211 break; 2212 } 2213 conn->state = OPEN; 2214 conn->con_handle = little_endian_read_16(packet, 3); 2215 2216 #ifdef ENABLE_SCO_OVER_HCI 2217 // update SCO 2218 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2219 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2220 } 2221 // trigger can send now 2222 if (hci_have_usb_transport()){ 2223 hci_stack->sco_can_send_now = 1; 2224 } 2225 #endif 2226 break; 2227 2228 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2229 handle = little_endian_read_16(packet, 3); 2230 conn = hci_connection_for_handle(handle); 2231 if (!conn) break; 2232 if (!packet[2]){ 2233 uint8_t * features = &packet[5]; 2234 if (features[6] & (1 << 3)){ 2235 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2236 } 2237 if (features[3] & (1<<7)){ 2238 conn->remote_supported_feature_eSCO = 1; 2239 } 2240 } 2241 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2242 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2243 if (conn->bonding_flags & BONDING_DEDICATED){ 2244 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2245 } 2246 break; 2247 2248 case HCI_EVENT_LINK_KEY_REQUEST: 2249 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2250 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2251 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2252 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2253 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2254 hci_run(); 2255 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2256 return; 2257 2258 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2259 reverse_bd_addr(&packet[2], addr); 2260 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2261 if (!conn) break; 2262 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2263 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2264 // Change Connection Encryption keeps link key type 2265 if (link_key_type != CHANGED_COMBINATION_KEY){ 2266 conn->link_key_type = link_key_type; 2267 } 2268 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2269 // still forward event to allow dismiss of pairing dialog 2270 break; 2271 } 2272 2273 case HCI_EVENT_PIN_CODE_REQUEST: 2274 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2275 // non-bondable mode: pin code negative reply will be sent 2276 if (!hci_stack->bondable){ 2277 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2278 hci_run(); 2279 return; 2280 } 2281 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2282 if (!hci_stack->link_key_db) break; 2283 hci_event_pin_code_request_get_bd_addr(packet, addr); 2284 hci_stack->link_key_db->delete_link_key(addr); 2285 break; 2286 2287 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2288 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2289 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2290 break; 2291 2292 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2293 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2294 if (!hci_stack->ssp_auto_accept) break; 2295 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2296 break; 2297 2298 case HCI_EVENT_USER_PASSKEY_REQUEST: 2299 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2300 if (!hci_stack->ssp_auto_accept) break; 2301 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2302 break; 2303 case HCI_EVENT_MODE_CHANGE: 2304 handle = hci_event_mode_change_get_handle(packet); 2305 conn = hci_connection_for_handle(handle); 2306 if (!conn) break; 2307 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2308 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2309 break; 2310 #endif 2311 2312 case HCI_EVENT_ENCRYPTION_CHANGE: 2313 handle = little_endian_read_16(packet, 3); 2314 conn = hci_connection_for_handle(handle); 2315 if (!conn) break; 2316 if (packet[2] == 0) { 2317 if (packet[5]){ 2318 if (hci_is_le_connection(conn)){ 2319 // For LE, we accept connection as encrypted 2320 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2321 } 2322 #ifdef ENABLE_CLASSIC 2323 else { 2324 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2325 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2326 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2327 } else { 2328 // if not, pretend everything is perfect 2329 conn->encryption_key_size = 16; 2330 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2331 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2332 } 2333 } 2334 #endif 2335 } else { 2336 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2337 } 2338 } 2339 2340 break; 2341 2342 #ifdef ENABLE_CLASSIC 2343 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2344 handle = little_endian_read_16(packet, 3); 2345 conn = hci_connection_for_handle(handle); 2346 if (!conn) break; 2347 2348 // dedicated bonding: send result and disconnect 2349 if (conn->bonding_flags & BONDING_DEDICATED){ 2350 conn->bonding_flags &= ~BONDING_DEDICATED; 2351 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2352 conn->bonding_status = packet[2]; 2353 break; 2354 } 2355 2356 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2357 // link key sufficient for requested security 2358 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2359 break; 2360 } 2361 // not enough 2362 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2363 break; 2364 #endif 2365 2366 // HCI_EVENT_DISCONNECTION_COMPLETE 2367 // has been split, to first notify stack before shutting connection down 2368 // see end of function, too. 2369 case HCI_EVENT_DISCONNECTION_COMPLETE: 2370 if (packet[2]) break; // status != 0 2371 handle = little_endian_read_16(packet, 3); 2372 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2373 if (hci_stack->acl_fragmentation_total_size > 0) { 2374 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2375 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2376 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2377 hci_stack->acl_fragmentation_total_size = 0; 2378 hci_stack->acl_fragmentation_pos = 0; 2379 if (release_buffer){ 2380 hci_release_packet_buffer(); 2381 } 2382 } 2383 } 2384 2385 // re-enable advertisements for le connections if active 2386 conn = hci_connection_for_handle(handle); 2387 if (!conn) break; 2388 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2389 #ifdef ENABLE_BLE 2390 #ifdef ENABLE_LE_PERIPHERAL 2391 if (hci_is_le_connection(conn)){ 2392 hci_reenable_advertisements_if_needed(); 2393 } 2394 #endif 2395 #endif 2396 break; 2397 2398 case HCI_EVENT_HARDWARE_ERROR: 2399 log_error("Hardware Error: 0x%02x", packet[2]); 2400 if (hci_stack->hardware_error_callback){ 2401 (*hci_stack->hardware_error_callback)(packet[2]); 2402 } else { 2403 // if no special requests, just reboot stack 2404 hci_power_control_off(); 2405 hci_power_control_on(); 2406 } 2407 break; 2408 2409 #ifdef ENABLE_CLASSIC 2410 case HCI_EVENT_ROLE_CHANGE: 2411 if (packet[2]) break; // status != 0 2412 reverse_bd_addr(&packet[3], addr); 2413 addr_type = BD_ADDR_TYPE_ACL; 2414 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2415 if (!conn) break; 2416 conn->role = packet[9]; 2417 break; 2418 #endif 2419 2420 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2421 // release packet buffer only for asynchronous transport and if there are not further fragements 2422 if (hci_transport_synchronous()) { 2423 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2424 return; // instead of break: to avoid re-entering hci_run() 2425 } 2426 hci_stack->acl_fragmentation_tx_active = 0; 2427 if (hci_stack->acl_fragmentation_total_size) break; 2428 hci_release_packet_buffer(); 2429 2430 // L2CAP receives this event via the hci_emit_event below 2431 2432 #ifdef ENABLE_CLASSIC 2433 // For SCO, we do the can_send_now_check here 2434 hci_notify_if_sco_can_send_now(); 2435 #endif 2436 break; 2437 2438 #ifdef ENABLE_CLASSIC 2439 case HCI_EVENT_SCO_CAN_SEND_NOW: 2440 // For SCO, we do the can_send_now_check here 2441 hci_stack->sco_can_send_now = 1; 2442 hci_notify_if_sco_can_send_now(); 2443 return; 2444 2445 // explode inquriy results for easier consumption 2446 case HCI_EVENT_INQUIRY_RESULT: 2447 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2448 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2449 gap_inquiry_explode(packet, size); 2450 break; 2451 #endif 2452 2453 #ifdef ENABLE_BLE 2454 case HCI_EVENT_LE_META: 2455 switch (packet[2]){ 2456 #ifdef ENABLE_LE_CENTRAL 2457 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2458 // log_info("advertising report received"); 2459 if (!hci_stack->le_scanning_enabled) break; 2460 le_handle_advertisement_report(packet, size); 2461 break; 2462 #endif 2463 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2464 // Connection management 2465 reverse_bd_addr(&packet[8], addr); 2466 addr_type = (bd_addr_type_t)packet[7]; 2467 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2468 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2469 2470 #ifdef ENABLE_LE_CENTRAL 2471 // if auto-connect, remove from whitelist in both roles 2472 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2473 hci_remove_from_whitelist(addr_type, addr); 2474 } 2475 // handle error: error is reported only to the initiator -> outgoing connection 2476 if (packet[3]){ 2477 2478 // handle cancelled outgoing connection 2479 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2480 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2481 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2482 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2483 conn = gap_get_outgoing_connection(); 2484 } 2485 2486 // outgoing connection establishment is done 2487 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2488 // remove entry 2489 if (conn){ 2490 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2491 btstack_memory_hci_connection_free( conn ); 2492 } 2493 break; 2494 } 2495 #endif 2496 // on success, both hosts receive connection complete event 2497 if (packet[6] == HCI_ROLE_MASTER){ 2498 #ifdef ENABLE_LE_CENTRAL 2499 // if we're master, it was an outgoing connection and we're done with it 2500 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2501 #endif 2502 } else { 2503 #ifdef ENABLE_LE_PERIPHERAL 2504 // if we're slave, it was an incoming connection, advertisements have stopped 2505 hci_stack->le_advertisements_active = 0; 2506 #endif 2507 } 2508 // LE connections are auto-accepted, so just create a connection if there isn't one already 2509 if (!conn){ 2510 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2511 } 2512 // no memory, sorry. 2513 if (!conn){ 2514 break; 2515 } 2516 2517 conn->state = OPEN; 2518 conn->role = packet[6]; 2519 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2520 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2521 2522 #ifdef ENABLE_LE_PERIPHERAL 2523 if (packet[6] == HCI_ROLE_SLAVE){ 2524 hci_reenable_advertisements_if_needed(); 2525 } 2526 #endif 2527 2528 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2529 2530 // restart timer 2531 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2532 // btstack_run_loop_add_timer(&conn->timeout); 2533 2534 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2535 2536 hci_emit_nr_connections_changed(); 2537 break; 2538 2539 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2540 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2541 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2542 conn = hci_connection_for_handle(handle); 2543 if (!conn) break; 2544 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2545 break; 2546 2547 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2548 // connection 2549 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2550 conn = hci_connection_for_handle(handle); 2551 if (conn) { 2552 // read arguments 2553 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2554 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2555 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2556 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2557 2558 // validate against current connection parameter range 2559 le_connection_parameter_range_t existing_range; 2560 gap_get_connection_parameter_range(&existing_range); 2561 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2562 if (update_parameter){ 2563 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2564 conn->le_conn_interval_min = le_conn_interval_min; 2565 conn->le_conn_interval_max = le_conn_interval_max; 2566 conn->le_conn_latency = le_conn_latency; 2567 conn->le_supervision_timeout = le_supervision_timeout; 2568 } else { 2569 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2570 } 2571 } 2572 break; 2573 default: 2574 break; 2575 } 2576 break; 2577 #endif 2578 case HCI_EVENT_VENDOR_SPECIFIC: 2579 // Vendor specific commands often create vendor specific event instead of num completed packets 2580 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2581 switch (hci_stack->manufacturer){ 2582 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2583 hci_stack->num_cmd_packets = 1; 2584 break; 2585 default: 2586 break; 2587 } 2588 break; 2589 default: 2590 break; 2591 } 2592 2593 // handle BT initialization 2594 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2595 hci_initializing_event_handler(packet, size); 2596 } 2597 2598 // help with BT sleep 2599 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2600 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2601 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2602 hci_initializing_next_state(); 2603 } 2604 2605 // notify upper stack 2606 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2607 2608 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2609 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2610 if (!packet[2]){ 2611 handle = little_endian_read_16(packet, 3); 2612 hci_connection_t * aConn = hci_connection_for_handle(handle); 2613 if (aConn) { 2614 uint8_t status = aConn->bonding_status; 2615 uint16_t flags = aConn->bonding_flags; 2616 bd_addr_t bd_address; 2617 (void)memcpy(&bd_address, aConn->address, 6); 2618 hci_shutdown_connection(aConn); 2619 // connection struct is gone, don't access anymore 2620 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2621 hci_emit_dedicated_bonding_result(bd_address, status); 2622 } 2623 } 2624 } 2625 } 2626 2627 // execute main loop 2628 hci_run(); 2629 } 2630 2631 #ifdef ENABLE_CLASSIC 2632 2633 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2634 static void sco_schedule_tx(hci_connection_t * conn); 2635 2636 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2637 log_debug("SCO TX Timeout"); 2638 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2639 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2640 if (!conn) return; 2641 2642 // trigger send 2643 conn->sco_tx_ready = 1; 2644 // extra packet if CVSD but SCO buffer is too short 2645 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2646 conn->sco_tx_ready++; 2647 } 2648 hci_notify_if_sco_can_send_now(); 2649 } 2650 2651 2652 #define SCO_TX_AFTER_RX_MS (6) 2653 2654 static void sco_schedule_tx(hci_connection_t * conn){ 2655 2656 uint32_t now = btstack_run_loop_get_time_ms(); 2657 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2658 int time_delta_ms = sco_tx_ms - now; 2659 2660 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2661 2662 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2663 btstack_run_loop_set_timer(timer, time_delta_ms); 2664 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2665 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2666 btstack_run_loop_add_timer(timer); 2667 } 2668 2669 static void sco_handler(uint8_t * packet, uint16_t size){ 2670 // lookup connection struct 2671 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2672 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2673 if (!conn) return; 2674 2675 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2676 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2677 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2678 packet[2] = 0x3c; 2679 memmove(&packet[3], &packet[23], 63); 2680 size = 63; 2681 } 2682 } 2683 2684 if (hci_have_usb_transport()){ 2685 // Nothing to do 2686 } else { 2687 // 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); 2688 if (hci_stack->synchronous_flow_control_enabled == 0){ 2689 uint32_t now = btstack_run_loop_get_time_ms(); 2690 2691 if (!conn->sco_rx_valid){ 2692 // ignore first 10 packets 2693 conn->sco_rx_count++; 2694 // log_debug("sco rx count %u", conn->sco_rx_count); 2695 if (conn->sco_rx_count == 10) { 2696 // use first timestamp as is and pretent it just started 2697 conn->sco_rx_ms = now; 2698 conn->sco_rx_valid = 1; 2699 conn->sco_rx_count = 0; 2700 sco_schedule_tx(conn); 2701 } 2702 } else { 2703 // track expected arrival timme 2704 conn->sco_rx_count++; 2705 conn->sco_rx_ms += 7; 2706 int delta = (int32_t) (now - conn->sco_rx_ms); 2707 if (delta > 0){ 2708 conn->sco_rx_ms++; 2709 } 2710 // log_debug("sco rx %u", conn->sco_rx_ms); 2711 sco_schedule_tx(conn); 2712 } 2713 } 2714 } 2715 // deliver to app 2716 if (hci_stack->sco_packet_handler) { 2717 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2718 } 2719 2720 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2721 conn->num_packets_completed++; 2722 hci_stack->host_completed_packets = 1; 2723 hci_run(); 2724 #endif 2725 } 2726 #endif 2727 2728 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2729 hci_dump_packet(packet_type, 1, packet, size); 2730 switch (packet_type) { 2731 case HCI_EVENT_PACKET: 2732 event_handler(packet, size); 2733 break; 2734 case HCI_ACL_DATA_PACKET: 2735 acl_handler(packet, size); 2736 break; 2737 #ifdef ENABLE_CLASSIC 2738 case HCI_SCO_DATA_PACKET: 2739 sco_handler(packet, size); 2740 break; 2741 #endif 2742 default: 2743 break; 2744 } 2745 } 2746 2747 /** 2748 * @brief Add event packet handler. 2749 */ 2750 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2751 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2752 } 2753 2754 2755 /** Register HCI packet handlers */ 2756 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2757 hci_stack->acl_packet_handler = handler; 2758 } 2759 2760 #ifdef ENABLE_CLASSIC 2761 /** 2762 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2763 */ 2764 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2765 hci_stack->sco_packet_handler = handler; 2766 } 2767 #endif 2768 2769 static void hci_state_reset(void){ 2770 // no connections yet 2771 hci_stack->connections = NULL; 2772 2773 // keep discoverable/connectable as this has been requested by the client(s) 2774 // hci_stack->discoverable = 0; 2775 // hci_stack->connectable = 0; 2776 // hci_stack->bondable = 1; 2777 // hci_stack->own_addr_type = 0; 2778 2779 // buffer is free 2780 hci_stack->hci_packet_buffer_reserved = 0; 2781 2782 // no pending cmds 2783 hci_stack->decline_reason = 0; 2784 hci_stack->new_scan_enable_value = 0xff; 2785 2786 // LE 2787 #ifdef ENABLE_BLE 2788 memset(hci_stack->le_random_address, 0, 6); 2789 hci_stack->le_random_address_set = 0; 2790 #endif 2791 #ifdef ENABLE_LE_CENTRAL 2792 hci_stack->le_scanning_active = 0; 2793 hci_stack->le_scan_type = 0xff; 2794 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2795 hci_stack->le_whitelist = 0; 2796 hci_stack->le_whitelist_capacity = 0; 2797 #endif 2798 } 2799 2800 #ifdef ENABLE_CLASSIC 2801 /** 2802 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2803 */ 2804 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2805 // store and open remote device db 2806 hci_stack->link_key_db = link_key_db; 2807 if (hci_stack->link_key_db) { 2808 hci_stack->link_key_db->open(); 2809 } 2810 } 2811 #endif 2812 2813 void hci_init(const hci_transport_t *transport, const void *config){ 2814 2815 #ifdef HAVE_MALLOC 2816 if (!hci_stack) { 2817 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2818 } 2819 #else 2820 hci_stack = &hci_stack_static; 2821 #endif 2822 memset(hci_stack, 0, sizeof(hci_stack_t)); 2823 2824 // reference to use transport layer implementation 2825 hci_stack->hci_transport = transport; 2826 2827 // reference to used config 2828 hci_stack->config = config; 2829 2830 // setup pointer for outgoing packet buffer 2831 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2832 2833 // max acl payload size defined in config.h 2834 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2835 2836 // register packet handlers with transport 2837 transport->register_packet_handler(&packet_handler); 2838 2839 hci_stack->state = HCI_STATE_OFF; 2840 2841 // class of device 2842 hci_stack->class_of_device = 0x007a020c; // Smartphone 2843 2844 // bondable by default 2845 hci_stack->bondable = 1; 2846 2847 #ifdef ENABLE_CLASSIC 2848 // classic name 2849 hci_stack->local_name = default_classic_name; 2850 2851 // Master slave policy 2852 hci_stack->master_slave_policy = 1; 2853 2854 // Allow Role Switch 2855 hci_stack->allow_role_switch = 1; 2856 2857 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2858 hci_stack->gap_required_encyrption_key_size = 16; 2859 #endif 2860 2861 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2862 hci_stack->ssp_enable = 1; 2863 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2864 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2865 hci_stack->ssp_auto_accept = 1; 2866 2867 // voice setting - signed 16 bit pcm data with CVSD over the air 2868 hci_stack->sco_voice_setting = 0x60; 2869 2870 #ifdef ENABLE_LE_CENTRAL 2871 // connection parameter to use for outgoing connections 2872 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2873 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2874 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2875 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2876 hci_stack->le_connection_latency = 4; // 4 2877 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2878 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2879 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2880 2881 // default LE Scanning 2882 hci_stack->le_scan_interval = 0x1e0; 2883 hci_stack->le_scan_window = 0x30; 2884 #endif 2885 2886 #ifdef ENABLE_LE_PERIPHERAL 2887 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2888 #endif 2889 2890 // connection parameter range used to answer connection parameter update requests in l2cap 2891 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2892 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2893 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2894 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2895 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2896 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2897 2898 hci_state_reset(); 2899 } 2900 2901 /** 2902 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2903 */ 2904 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2905 hci_stack->chipset = chipset_driver; 2906 2907 // reset chipset driver - init is also called on power_up 2908 if (hci_stack->chipset && hci_stack->chipset->init){ 2909 hci_stack->chipset->init(hci_stack->config); 2910 } 2911 } 2912 2913 /** 2914 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2915 */ 2916 void hci_set_control(const btstack_control_t *hardware_control){ 2917 // references to used control implementation 2918 hci_stack->control = hardware_control; 2919 // init with transport config 2920 hardware_control->init(hci_stack->config); 2921 } 2922 2923 void hci_close(void){ 2924 // close remote device db 2925 if (hci_stack->link_key_db) { 2926 hci_stack->link_key_db->close(); 2927 } 2928 2929 btstack_linked_list_iterator_t lit; 2930 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2931 while (btstack_linked_list_iterator_has_next(&lit)){ 2932 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2933 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2934 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2935 hci_shutdown_connection(connection); 2936 } 2937 2938 hci_power_control(HCI_POWER_OFF); 2939 2940 #ifdef HAVE_MALLOC 2941 free(hci_stack); 2942 #endif 2943 hci_stack = NULL; 2944 } 2945 2946 #ifdef ENABLE_CLASSIC 2947 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2948 // validate ranage and set 2949 if (encryption_key_size < 7) return; 2950 if (encryption_key_size > 16) return; 2951 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2952 } 2953 #endif 2954 2955 #ifdef ENABLE_CLASSIC 2956 void gap_set_class_of_device(uint32_t class_of_device){ 2957 hci_stack->class_of_device = class_of_device; 2958 } 2959 2960 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2961 hci_stack->default_link_policy_settings = default_link_policy_settings; 2962 } 2963 2964 void gap_set_allow_role_switch(bool allow_role_switch){ 2965 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 2966 } 2967 2968 uint8_t hci_get_allow_role_switch(void){ 2969 return hci_stack->allow_role_switch; 2970 } 2971 2972 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 2973 hci_stack->link_supervision_timeout = link_supervision_timeout; 2974 } 2975 2976 void hci_disable_l2cap_timeout_check(void){ 2977 disable_l2cap_timeouts = 1; 2978 } 2979 #endif 2980 2981 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2982 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2983 void hci_set_bd_addr(bd_addr_t addr){ 2984 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 2985 hci_stack->custom_bd_addr_set = 1; 2986 } 2987 #endif 2988 2989 // State-Module-Driver overview 2990 // state module low-level 2991 // HCI_STATE_OFF off close 2992 // HCI_STATE_INITIALIZING, on open 2993 // HCI_STATE_WORKING, on open 2994 // HCI_STATE_HALTING, on open 2995 // HCI_STATE_SLEEPING, off/sleep close 2996 // HCI_STATE_FALLING_ASLEEP on open 2997 2998 static int hci_power_control_on(void){ 2999 3000 // power on 3001 int err = 0; 3002 if (hci_stack->control && hci_stack->control->on){ 3003 err = (*hci_stack->control->on)(); 3004 } 3005 if (err){ 3006 log_error( "POWER_ON failed"); 3007 hci_emit_hci_open_failed(); 3008 return err; 3009 } 3010 3011 // int chipset driver 3012 if (hci_stack->chipset && hci_stack->chipset->init){ 3013 hci_stack->chipset->init(hci_stack->config); 3014 } 3015 3016 // init transport 3017 if (hci_stack->hci_transport->init){ 3018 hci_stack->hci_transport->init(hci_stack->config); 3019 } 3020 3021 // open transport 3022 err = hci_stack->hci_transport->open(); 3023 if (err){ 3024 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3025 if (hci_stack->control && hci_stack->control->off){ 3026 (*hci_stack->control->off)(); 3027 } 3028 hci_emit_hci_open_failed(); 3029 return err; 3030 } 3031 return 0; 3032 } 3033 3034 static void hci_power_control_off(void){ 3035 3036 log_info("hci_power_control_off"); 3037 3038 // close low-level device 3039 hci_stack->hci_transport->close(); 3040 3041 log_info("hci_power_control_off - hci_transport closed"); 3042 3043 // power off 3044 if (hci_stack->control && hci_stack->control->off){ 3045 (*hci_stack->control->off)(); 3046 } 3047 3048 log_info("hci_power_control_off - control closed"); 3049 3050 hci_stack->state = HCI_STATE_OFF; 3051 } 3052 3053 static void hci_power_control_sleep(void){ 3054 3055 log_info("hci_power_control_sleep"); 3056 3057 #if 0 3058 // don't close serial port during sleep 3059 3060 // close low-level device 3061 hci_stack->hci_transport->close(hci_stack->config); 3062 #endif 3063 3064 // sleep mode 3065 if (hci_stack->control && hci_stack->control->sleep){ 3066 (*hci_stack->control->sleep)(); 3067 } 3068 3069 hci_stack->state = HCI_STATE_SLEEPING; 3070 } 3071 3072 static int hci_power_control_wake(void){ 3073 3074 log_info("hci_power_control_wake"); 3075 3076 // wake on 3077 if (hci_stack->control && hci_stack->control->wake){ 3078 (*hci_stack->control->wake)(); 3079 } 3080 3081 #if 0 3082 // open low-level device 3083 int err = hci_stack->hci_transport->open(hci_stack->config); 3084 if (err){ 3085 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3086 if (hci_stack->control && hci_stack->control->off){ 3087 (*hci_stack->control->off)(); 3088 } 3089 hci_emit_hci_open_failed(); 3090 return err; 3091 } 3092 #endif 3093 3094 return 0; 3095 } 3096 3097 static void hci_power_transition_to_initializing(void){ 3098 // set up state machine 3099 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3100 hci_stack->hci_packet_buffer_reserved = 0; 3101 hci_stack->state = HCI_STATE_INITIALIZING; 3102 hci_stack->substate = HCI_INIT_SEND_RESET; 3103 } 3104 3105 int hci_power_control(HCI_POWER_MODE power_mode){ 3106 3107 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3108 3109 int err = 0; 3110 switch (hci_stack->state){ 3111 3112 case HCI_STATE_OFF: 3113 switch (power_mode){ 3114 case HCI_POWER_ON: 3115 err = hci_power_control_on(); 3116 if (err) { 3117 log_error("hci_power_control_on() error %d", err); 3118 return err; 3119 } 3120 hci_power_transition_to_initializing(); 3121 break; 3122 case HCI_POWER_OFF: 3123 // do nothing 3124 break; 3125 case HCI_POWER_SLEEP: 3126 // do nothing (with SLEEP == OFF) 3127 break; 3128 } 3129 break; 3130 3131 case HCI_STATE_INITIALIZING: 3132 switch (power_mode){ 3133 case HCI_POWER_ON: 3134 // do nothing 3135 break; 3136 case HCI_POWER_OFF: 3137 // no connections yet, just turn it off 3138 hci_power_control_off(); 3139 break; 3140 case HCI_POWER_SLEEP: 3141 // no connections yet, just turn it off 3142 hci_power_control_sleep(); 3143 break; 3144 } 3145 break; 3146 3147 case HCI_STATE_WORKING: 3148 switch (power_mode){ 3149 case HCI_POWER_ON: 3150 // do nothing 3151 break; 3152 case HCI_POWER_OFF: 3153 // see hci_run 3154 hci_stack->state = HCI_STATE_HALTING; 3155 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3156 break; 3157 case HCI_POWER_SLEEP: 3158 // see hci_run 3159 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3160 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3161 break; 3162 } 3163 break; 3164 3165 case HCI_STATE_HALTING: 3166 switch (power_mode){ 3167 case HCI_POWER_ON: 3168 hci_power_transition_to_initializing(); 3169 break; 3170 case HCI_POWER_OFF: 3171 // do nothing 3172 break; 3173 case HCI_POWER_SLEEP: 3174 // see hci_run 3175 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3176 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3177 break; 3178 } 3179 break; 3180 3181 case HCI_STATE_FALLING_ASLEEP: 3182 switch (power_mode){ 3183 case HCI_POWER_ON: 3184 3185 #ifdef HAVE_PLATFORM_IPHONE_OS 3186 // nothing to do, if H4 supports power management 3187 if (btstack_control_iphone_power_management_enabled()){ 3188 hci_stack->state = HCI_STATE_INITIALIZING; 3189 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3190 break; 3191 } 3192 #endif 3193 hci_power_transition_to_initializing(); 3194 break; 3195 case HCI_POWER_OFF: 3196 // see hci_run 3197 hci_stack->state = HCI_STATE_HALTING; 3198 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3199 break; 3200 case HCI_POWER_SLEEP: 3201 // do nothing 3202 break; 3203 } 3204 break; 3205 3206 case HCI_STATE_SLEEPING: 3207 switch (power_mode){ 3208 case HCI_POWER_ON: 3209 3210 #ifdef HAVE_PLATFORM_IPHONE_OS 3211 // nothing to do, if H4 supports power management 3212 if (btstack_control_iphone_power_management_enabled()){ 3213 hci_stack->state = HCI_STATE_INITIALIZING; 3214 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3215 hci_update_scan_enable(); 3216 break; 3217 } 3218 #endif 3219 err = hci_power_control_wake(); 3220 if (err) return err; 3221 hci_power_transition_to_initializing(); 3222 break; 3223 case HCI_POWER_OFF: 3224 hci_stack->state = HCI_STATE_HALTING; 3225 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3226 break; 3227 case HCI_POWER_SLEEP: 3228 // do nothing 3229 break; 3230 } 3231 break; 3232 } 3233 3234 // create internal event 3235 hci_emit_state(); 3236 3237 // trigger next/first action 3238 hci_run(); 3239 3240 return 0; 3241 } 3242 3243 3244 #ifdef ENABLE_CLASSIC 3245 3246 static void hci_update_scan_enable(void){ 3247 // 2 = page scan, 1 = inq scan 3248 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3249 hci_run(); 3250 } 3251 3252 void gap_discoverable_control(uint8_t enable){ 3253 if (enable) enable = 1; // normalize argument 3254 3255 if (hci_stack->discoverable == enable){ 3256 hci_emit_discoverable_enabled(hci_stack->discoverable); 3257 return; 3258 } 3259 3260 hci_stack->discoverable = enable; 3261 hci_update_scan_enable(); 3262 } 3263 3264 void gap_connectable_control(uint8_t enable){ 3265 if (enable) enable = 1; // normalize argument 3266 3267 // don't emit event 3268 if (hci_stack->connectable == enable) return; 3269 3270 hci_stack->connectable = enable; 3271 hci_update_scan_enable(); 3272 } 3273 #endif 3274 3275 void gap_local_bd_addr(bd_addr_t address_buffer){ 3276 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3277 } 3278 3279 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3280 static void hci_host_num_completed_packets(void){ 3281 3282 // create packet manually as arrays are not supported and num_commands should not get reduced 3283 hci_reserve_packet_buffer(); 3284 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3285 3286 uint16_t size = 0; 3287 uint16_t num_handles = 0; 3288 packet[size++] = 0x35; 3289 packet[size++] = 0x0c; 3290 size++; // skip param len 3291 size++; // skip num handles 3292 3293 // add { handle, packets } entries 3294 btstack_linked_item_t * it; 3295 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3296 hci_connection_t * connection = (hci_connection_t *) it; 3297 if (connection->num_packets_completed){ 3298 little_endian_store_16(packet, size, connection->con_handle); 3299 size += 2; 3300 little_endian_store_16(packet, size, connection->num_packets_completed); 3301 size += 2; 3302 // 3303 num_handles++; 3304 connection->num_packets_completed = 0; 3305 } 3306 } 3307 3308 packet[2] = size - 3; 3309 packet[3] = num_handles; 3310 3311 hci_stack->host_completed_packets = 0; 3312 3313 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3314 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3315 3316 // release packet buffer for synchronous transport implementations 3317 if (hci_transport_synchronous()){ 3318 hci_release_packet_buffer(); 3319 hci_emit_transport_packet_sent(); 3320 } 3321 } 3322 #endif 3323 3324 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3325 UNUSED(ds); 3326 hci_stack->substate = HCI_HALTING_CLOSE; 3327 // allow packet handlers to defer final shutdown 3328 hci_emit_state(); 3329 hci_run(); 3330 } 3331 3332 static bool hci_run_acl_fragments(void){ 3333 if (hci_stack->acl_fragmentation_total_size > 0) { 3334 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3335 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3336 if (connection) { 3337 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3338 hci_send_acl_packet_fragments(connection); 3339 return true; 3340 } 3341 } else { 3342 // connection gone -> discard further fragments 3343 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3344 hci_stack->acl_fragmentation_total_size = 0; 3345 hci_stack->acl_fragmentation_pos = 0; 3346 } 3347 } 3348 return false; 3349 } 3350 3351 #ifdef ENABLE_CLASSIC 3352 static bool hci_run_general_gap_classic(void){ 3353 3354 // decline incoming connections 3355 if (hci_stack->decline_reason){ 3356 uint8_t reason = hci_stack->decline_reason; 3357 hci_stack->decline_reason = 0; 3358 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3359 return true; 3360 } 3361 // send scan enable 3362 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3363 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3364 hci_stack->new_scan_enable_value = 0xff; 3365 return true; 3366 } 3367 // start/stop inquiry 3368 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3369 uint8_t duration = hci_stack->inquiry_state; 3370 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3371 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3372 return true; 3373 } 3374 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3375 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3376 hci_send_cmd(&hci_inquiry_cancel); 3377 return true; 3378 } 3379 // remote name request 3380 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3381 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3382 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3383 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3384 return true; 3385 } 3386 // pairing 3387 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3388 uint8_t state = hci_stack->gap_pairing_state; 3389 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3390 switch (state){ 3391 case GAP_PAIRING_STATE_SEND_PIN: 3392 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); 3393 break; 3394 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3395 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3396 break; 3397 case GAP_PAIRING_STATE_SEND_PASSKEY: 3398 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3399 break; 3400 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3401 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3402 break; 3403 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3404 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3405 break; 3406 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3407 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3408 break; 3409 default: 3410 break; 3411 } 3412 return true; 3413 } 3414 return false; 3415 } 3416 #endif 3417 3418 #ifdef ENABLE_BLE 3419 static bool hci_run_general_gap_le(void){ 3420 3421 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3422 3423 if (hci_stack->state != HCI_STATE_WORKING) return false; 3424 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3425 3426 #ifdef ENABLE_LE_CENTRAL 3427 // parameter change requires scanning to be stopped first 3428 if (hci_stack->le_scan_type != 0xff) { 3429 if (hci_stack->le_scanning_active){ 3430 hci_stack->le_scanning_active = 0; 3431 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3432 } else { 3433 int scan_type = (int) hci_stack->le_scan_type; 3434 hci_stack->le_scan_type = 0xff; 3435 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); 3436 } 3437 return true; 3438 } 3439 // finally, we can enable/disable le scan 3440 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3441 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3442 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3443 return true; 3444 } 3445 #endif 3446 #ifdef ENABLE_LE_PERIPHERAL 3447 // le advertisement control 3448 if (hci_stack->le_advertisements_todo){ 3449 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3450 } 3451 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3452 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3453 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3454 return true; 3455 } 3456 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3457 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3458 hci_send_cmd(&hci_le_set_advertising_parameters, 3459 hci_stack->le_advertisements_interval_min, 3460 hci_stack->le_advertisements_interval_max, 3461 hci_stack->le_advertisements_type, 3462 hci_stack->le_own_addr_type, 3463 hci_stack->le_advertisements_direct_address_type, 3464 hci_stack->le_advertisements_direct_address, 3465 hci_stack->le_advertisements_channel_map, 3466 hci_stack->le_advertisements_filter_policy); 3467 return true; 3468 } 3469 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3470 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3471 uint8_t adv_data_clean[31]; 3472 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3473 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3474 hci_stack->le_advertisements_data_len); 3475 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3476 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3477 return true; 3478 } 3479 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3480 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3481 uint8_t scan_data_clean[31]; 3482 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3483 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3484 hci_stack->le_scan_response_data_len); 3485 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3486 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3487 return true; 3488 } 3489 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3490 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3491 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3492 return true; 3493 } 3494 #endif 3495 3496 #ifdef ENABLE_LE_CENTRAL 3497 // 3498 // LE Whitelist Management 3499 // 3500 3501 // check if whitelist needs modification 3502 btstack_linked_list_iterator_t lit; 3503 int modification_pending = 0; 3504 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3505 while (btstack_linked_list_iterator_has_next(&lit)){ 3506 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3507 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3508 modification_pending = 1; 3509 break; 3510 } 3511 } 3512 3513 if (modification_pending){ 3514 // stop connnecting if modification pending 3515 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3516 hci_send_cmd(&hci_le_create_connection_cancel); 3517 return true; 3518 } 3519 3520 // add/remove entries 3521 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3522 while (btstack_linked_list_iterator_has_next(&lit)){ 3523 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3524 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3525 entry->state = LE_WHITELIST_ON_CONTROLLER; 3526 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3527 return true; 3528 } 3529 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3530 bd_addr_t address; 3531 bd_addr_type_t address_type = entry->address_type; 3532 (void)memcpy(address, entry->address, 6); 3533 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3534 btstack_memory_whitelist_entry_free(entry); 3535 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3536 return true; 3537 } 3538 } 3539 } 3540 3541 // start connecting 3542 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3543 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3544 bd_addr_t null_addr; 3545 memset(null_addr, 0, 6); 3546 hci_send_cmd(&hci_le_create_connection, 3547 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3548 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3549 1, // use whitelist 3550 0, // peer address type 3551 null_addr, // peer bd addr 3552 hci_stack->le_own_addr_type, // our addr type: 3553 hci_stack->le_connection_interval_min, // conn interval min 3554 hci_stack->le_connection_interval_max, // conn interval max 3555 hci_stack->le_connection_latency, // conn latency 3556 hci_stack->le_supervision_timeout, // conn latency 3557 hci_stack->le_minimum_ce_length, // min ce length 3558 hci_stack->le_maximum_ce_length // max ce length 3559 ); 3560 return true; 3561 } 3562 #endif 3563 return false; 3564 } 3565 #endif 3566 3567 static bool hci_run_general_pending_commmands(void){ 3568 btstack_linked_item_t * it; 3569 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3570 hci_connection_t * connection = (hci_connection_t *) it; 3571 3572 switch(connection->state){ 3573 case SEND_CREATE_CONNECTION: 3574 switch(connection->address_type){ 3575 #ifdef ENABLE_CLASSIC 3576 case BD_ADDR_TYPE_ACL: 3577 log_info("sending hci_create_connection"); 3578 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3579 break; 3580 #endif 3581 default: 3582 #ifdef ENABLE_BLE 3583 #ifdef ENABLE_LE_CENTRAL 3584 // track outgoing connection 3585 hci_stack->outgoing_addr_type = connection->address_type; 3586 (void)memcpy(hci_stack->outgoing_addr, 3587 connection->address, 6); 3588 log_info("sending hci_le_create_connection"); 3589 hci_send_cmd(&hci_le_create_connection, 3590 hci_stack->le_connection_scan_interval, // conn scan interval 3591 hci_stack->le_connection_scan_window, // conn scan windows 3592 0, // don't use whitelist 3593 connection->address_type, // peer address type 3594 connection->address, // peer bd addr 3595 hci_stack->le_own_addr_type, // our addr type: 3596 hci_stack->le_connection_interval_min, // conn interval min 3597 hci_stack->le_connection_interval_max, // conn interval max 3598 hci_stack->le_connection_latency, // conn latency 3599 hci_stack->le_supervision_timeout, // conn latency 3600 hci_stack->le_minimum_ce_length, // min ce length 3601 hci_stack->le_maximum_ce_length // max ce length 3602 ); 3603 connection->state = SENT_CREATE_CONNECTION; 3604 #endif 3605 #endif 3606 break; 3607 } 3608 return true; 3609 3610 #ifdef ENABLE_CLASSIC 3611 case RECEIVED_CONNECTION_REQUEST: 3612 connection->role = HCI_ROLE_SLAVE; 3613 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3614 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3615 connection->state = ACCEPTED_CONNECTION_REQUEST; 3616 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3617 } 3618 return true; 3619 #endif 3620 3621 #ifdef ENABLE_BLE 3622 #ifdef ENABLE_LE_CENTRAL 3623 case SEND_CANCEL_CONNECTION: 3624 connection->state = SENT_CANCEL_CONNECTION; 3625 hci_send_cmd(&hci_le_create_connection_cancel); 3626 return true; 3627 #endif 3628 #endif 3629 case SEND_DISCONNECT: 3630 connection->state = SENT_DISCONNECT; 3631 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3632 return true; 3633 3634 default: 3635 break; 3636 } 3637 3638 // no further commands if connection is about to get shut down 3639 if (connection->state == SENT_DISCONNECT) continue; 3640 3641 if (connection->authentication_flags & READ_RSSI){ 3642 connectionClearAuthenticationFlags(connection, READ_RSSI); 3643 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3644 return true; 3645 } 3646 3647 #ifdef ENABLE_CLASSIC 3648 3649 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3650 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3651 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3652 return true; 3653 } 3654 3655 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3656 log_info("responding to link key request"); 3657 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3658 link_key_t link_key; 3659 link_key_type_t link_key_type; 3660 if ( hci_stack->link_key_db 3661 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3662 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3663 connection->link_key_type = link_key_type; 3664 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3665 } else { 3666 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3667 } 3668 return true; 3669 } 3670 3671 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3672 log_info("denying to pin request"); 3673 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3674 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3675 return true; 3676 } 3677 3678 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3679 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3680 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3681 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3682 // tweak authentication requirements 3683 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3684 if (connection->bonding_flags & BONDING_DEDICATED){ 3685 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3686 } 3687 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3688 authreq |= 1; 3689 } 3690 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3691 } else { 3692 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3693 } 3694 return true; 3695 } 3696 3697 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3698 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3699 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3700 return true; 3701 } 3702 3703 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3704 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3705 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3706 return true; 3707 } 3708 3709 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3710 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3711 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3712 return true; 3713 } 3714 3715 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3716 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3717 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3718 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3719 return true; 3720 } 3721 3722 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3723 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3724 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3725 return true; 3726 } 3727 3728 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3729 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3730 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3731 return true; 3732 } 3733 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3734 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3735 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3736 return true; 3737 } 3738 #endif 3739 3740 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3741 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3742 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3743 return true; 3744 } 3745 3746 #ifdef ENABLE_CLASSIC 3747 uint16_t sniff_min_interval; 3748 switch (connection->sniff_min_interval){ 3749 case 0: 3750 break; 3751 case 0xffff: 3752 connection->sniff_min_interval = 0; 3753 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3754 return true; 3755 default: 3756 sniff_min_interval = connection->sniff_min_interval; 3757 connection->sniff_min_interval = 0; 3758 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3759 return true; 3760 } 3761 #endif 3762 3763 #ifdef ENABLE_BLE 3764 switch (connection->le_con_parameter_update_state){ 3765 // response to L2CAP CON PARAMETER UPDATE REQUEST 3766 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3767 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3768 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3769 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3770 0x0000, 0xffff); 3771 return true; 3772 case CON_PARAMETER_UPDATE_REPLY: 3773 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3774 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3775 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3776 0x0000, 0xffff); 3777 return true; 3778 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3779 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3780 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3781 return true; 3782 default: 3783 break; 3784 } 3785 if (connection->le_phy_update_all_phys != 0xff){ 3786 uint8_t all_phys = connection->le_phy_update_all_phys; 3787 connection->le_phy_update_all_phys = 0xff; 3788 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); 3789 return true; 3790 } 3791 #endif 3792 } 3793 return false; 3794 } 3795 3796 static void hci_run(void){ 3797 3798 bool done; 3799 3800 // send continuation fragments first, as they block the prepared packet buffer 3801 done = hci_run_acl_fragments(); 3802 if (done) return; 3803 3804 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3805 // send host num completed packets next as they don't require num_cmd_packets > 0 3806 if (!hci_can_send_comand_packet_transport()) return; 3807 if (hci_stack->host_completed_packets){ 3808 hci_host_num_completed_packets(); 3809 return; 3810 } 3811 #endif 3812 3813 if (!hci_can_send_command_packet_now()) return; 3814 3815 // global/non-connection oriented commands 3816 3817 3818 #ifdef ENABLE_CLASSIC 3819 // general gap classic 3820 done = hci_run_general_gap_classic(); 3821 if (done) return; 3822 #endif 3823 3824 #ifdef ENABLE_BLE 3825 // general gap le 3826 done = hci_run_general_gap_le(); 3827 if (done) return; 3828 #endif 3829 3830 // send pending HCI commands 3831 done = hci_run_general_pending_commmands(); 3832 if (done) return; 3833 3834 // stack state sub statemachines 3835 hci_connection_t * connection; 3836 switch (hci_stack->state){ 3837 case HCI_STATE_INITIALIZING: 3838 hci_initializing_run(); 3839 break; 3840 3841 case HCI_STATE_HALTING: 3842 3843 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3844 switch (hci_stack->substate){ 3845 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3846 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3847 3848 #ifdef ENABLE_BLE 3849 #ifdef ENABLE_LE_CENTRAL 3850 // free whitelist entries 3851 { 3852 btstack_linked_list_iterator_t lit; 3853 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3854 while (btstack_linked_list_iterator_has_next(&lit)){ 3855 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3856 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3857 btstack_memory_whitelist_entry_free(entry); 3858 } 3859 } 3860 #endif 3861 #endif 3862 // close all open connections 3863 connection = (hci_connection_t *) hci_stack->connections; 3864 if (connection){ 3865 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3866 if (!hci_can_send_command_packet_now()) return; 3867 3868 // check state 3869 if (connection->state == SENT_DISCONNECT) return; 3870 connection->state = SENT_DISCONNECT; 3871 3872 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3873 3874 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3875 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3876 3877 // ... which would be ignored anyway as we shutdown (free) the connection now 3878 hci_shutdown_connection(connection); 3879 3880 // finally, send the disconnect command 3881 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3882 return; 3883 } 3884 3885 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3886 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3887 log_info("HCI_STATE_HALTING: wait 50 ms"); 3888 hci_stack->substate = HCI_HALTING_W4_TIMER; 3889 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3890 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3891 btstack_run_loop_add_timer(&hci_stack->timeout); 3892 break; 3893 } 3894 3895 /* fall through */ 3896 3897 case HCI_HALTING_CLOSE: 3898 log_info("HCI_STATE_HALTING, calling off"); 3899 3900 // switch mode 3901 hci_power_control_off(); 3902 3903 log_info("HCI_STATE_HALTING, emitting state"); 3904 hci_emit_state(); 3905 log_info("HCI_STATE_HALTING, done"); 3906 break; 3907 3908 case HCI_HALTING_W4_TIMER: 3909 // keep waiting 3910 3911 break; 3912 default: 3913 break; 3914 } 3915 3916 break; 3917 3918 case HCI_STATE_FALLING_ASLEEP: 3919 switch(hci_stack->substate) { 3920 case HCI_FALLING_ASLEEP_DISCONNECT: 3921 log_info("HCI_STATE_FALLING_ASLEEP"); 3922 // close all open connections 3923 connection = (hci_connection_t *) hci_stack->connections; 3924 3925 #ifdef HAVE_PLATFORM_IPHONE_OS 3926 // don't close connections, if H4 supports power management 3927 if (btstack_control_iphone_power_management_enabled()){ 3928 connection = NULL; 3929 } 3930 #endif 3931 if (connection){ 3932 3933 // send disconnect 3934 if (!hci_can_send_command_packet_now()) return; 3935 3936 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3937 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3938 3939 // send disconnected event right away - causes higher layer connections to get closed, too. 3940 hci_shutdown_connection(connection); 3941 return; 3942 } 3943 3944 if (hci_classic_supported()){ 3945 // disable page and inquiry scan 3946 if (!hci_can_send_command_packet_now()) return; 3947 3948 log_info("HCI_STATE_HALTING, disabling inq scans"); 3949 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3950 3951 // continue in next sub state 3952 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3953 break; 3954 } 3955 3956 /* fall through */ 3957 3958 case HCI_FALLING_ASLEEP_COMPLETE: 3959 log_info("HCI_STATE_HALTING, calling sleep"); 3960 #ifdef HAVE_PLATFORM_IPHONE_OS 3961 // don't actually go to sleep, if H4 supports power management 3962 if (btstack_control_iphone_power_management_enabled()){ 3963 // SLEEP MODE reached 3964 hci_stack->state = HCI_STATE_SLEEPING; 3965 hci_emit_state(); 3966 break; 3967 } 3968 #endif 3969 // switch mode 3970 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3971 hci_emit_state(); 3972 break; 3973 3974 default: 3975 break; 3976 } 3977 break; 3978 3979 default: 3980 break; 3981 } 3982 } 3983 3984 int hci_send_cmd_packet(uint8_t *packet, int size){ 3985 // house-keeping 3986 3987 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3988 hci_stack->loopback_mode = packet[3]; 3989 } 3990 3991 #ifdef ENABLE_CLASSIC 3992 bd_addr_t addr; 3993 hci_connection_t * conn; 3994 3995 // create_connection? 3996 if (IS_COMMAND(packet, hci_create_connection)){ 3997 reverse_bd_addr(&packet[3], addr); 3998 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3999 4000 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4001 if (!conn){ 4002 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4003 if (!conn){ 4004 // notify client that alloc failed 4005 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4006 return -1; // packet not sent to controller 4007 } 4008 conn->state = SEND_CREATE_CONNECTION; 4009 } 4010 log_info("conn state %u", conn->state); 4011 switch (conn->state){ 4012 // if connection active exists 4013 case OPEN: 4014 // and OPEN, emit connection complete command 4015 hci_emit_connection_complete(addr, conn->con_handle, 0); 4016 return -1; // packet not sent to controller 4017 case SEND_CREATE_CONNECTION: 4018 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4019 break; 4020 default: 4021 // otherwise, just ignore as it is already in the open process 4022 return -1; // packet not sent to controller 4023 } 4024 conn->state = SENT_CREATE_CONNECTION; 4025 4026 // track outgoing connection 4027 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4028 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4029 } 4030 4031 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4032 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4033 } 4034 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4035 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4036 } 4037 4038 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4039 if (hci_stack->link_key_db){ 4040 reverse_bd_addr(&packet[3], addr); 4041 hci_stack->link_key_db->delete_link_key(addr); 4042 } 4043 } 4044 4045 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4046 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4047 reverse_bd_addr(&packet[3], addr); 4048 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4049 if (conn){ 4050 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4051 } 4052 } 4053 4054 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4055 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4056 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4057 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4058 reverse_bd_addr(&packet[3], addr); 4059 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4060 if (conn){ 4061 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4062 } 4063 } 4064 4065 #ifdef ENABLE_SCO_OVER_HCI 4066 // setup_synchronous_connection? Voice setting at offset 22 4067 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4068 // TODO: compare to current setting if sco connection already active 4069 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4070 } 4071 // accept_synchronus_connection? Voice setting at offset 18 4072 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4073 // TODO: compare to current setting if sco connection already active 4074 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4075 } 4076 #endif 4077 #endif 4078 4079 #ifdef ENABLE_BLE 4080 if (IS_COMMAND(packet, hci_le_set_random_address)){ 4081 hci_stack->le_random_address_set = 1; 4082 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4083 } 4084 #ifdef ENABLE_LE_PERIPHERAL 4085 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4086 hci_stack->le_advertisements_active = packet[3]; 4087 } 4088 #endif 4089 #ifdef ENABLE_LE_CENTRAL 4090 if (IS_COMMAND(packet, hci_le_create_connection)){ 4091 // white list used? 4092 uint8_t initiator_filter_policy = packet[7]; 4093 switch (initiator_filter_policy){ 4094 case 0: 4095 // whitelist not used 4096 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4097 break; 4098 case 1: 4099 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4100 break; 4101 default: 4102 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4103 break; 4104 } 4105 } 4106 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4107 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4108 } 4109 #endif 4110 #endif 4111 4112 hci_stack->num_cmd_packets--; 4113 4114 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4115 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4116 } 4117 4118 // disconnect because of security block 4119 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4120 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4121 if (!connection) return; 4122 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4123 } 4124 4125 4126 // Configure Secure Simple Pairing 4127 4128 #ifdef ENABLE_CLASSIC 4129 4130 // enable will enable SSP during init 4131 void gap_ssp_set_enable(int enable){ 4132 hci_stack->ssp_enable = enable; 4133 } 4134 4135 static int hci_local_ssp_activated(void){ 4136 return gap_ssp_supported() && hci_stack->ssp_enable; 4137 } 4138 4139 // if set, BTstack will respond to io capability request using authentication requirement 4140 void gap_ssp_set_io_capability(int io_capability){ 4141 hci_stack->ssp_io_capability = io_capability; 4142 } 4143 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4144 hci_stack->ssp_authentication_requirement = authentication_requirement; 4145 } 4146 4147 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4148 void gap_ssp_set_auto_accept(int auto_accept){ 4149 hci_stack->ssp_auto_accept = auto_accept; 4150 } 4151 #endif 4152 4153 // va_list part of hci_send_cmd 4154 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4155 if (!hci_can_send_command_packet_now()){ 4156 log_error("hci_send_cmd called but cannot send packet now"); 4157 return 0; 4158 } 4159 4160 // for HCI INITIALIZATION 4161 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4162 hci_stack->last_cmd_opcode = cmd->opcode; 4163 4164 hci_reserve_packet_buffer(); 4165 uint8_t * packet = hci_stack->hci_packet_buffer; 4166 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4167 int err = hci_send_cmd_packet(packet, size); 4168 4169 // release packet buffer for synchronous transport implementations 4170 if (hci_transport_synchronous()){ 4171 hci_release_packet_buffer(); 4172 hci_emit_transport_packet_sent(); 4173 } 4174 4175 return err; 4176 } 4177 4178 /** 4179 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4180 */ 4181 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4182 va_list argptr; 4183 va_start(argptr, cmd); 4184 int res = hci_send_cmd_va_arg(cmd, argptr); 4185 va_end(argptr); 4186 return res; 4187 } 4188 4189 // Create various non-HCI events. 4190 // TODO: generalize, use table similar to hci_create_command 4191 4192 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4193 // dump packet 4194 if (dump) { 4195 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4196 } 4197 4198 // dispatch to all event handlers 4199 btstack_linked_list_iterator_t it; 4200 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4201 while (btstack_linked_list_iterator_has_next(&it)){ 4202 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4203 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4204 } 4205 } 4206 4207 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4208 if (!hci_stack->acl_packet_handler) return; 4209 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4210 } 4211 4212 #ifdef ENABLE_CLASSIC 4213 static void hci_notify_if_sco_can_send_now(void){ 4214 // notify SCO sender if waiting 4215 if (!hci_stack->sco_waiting_for_can_send_now) return; 4216 if (hci_can_send_sco_packet_now()){ 4217 hci_stack->sco_waiting_for_can_send_now = 0; 4218 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4219 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4220 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4221 } 4222 } 4223 4224 // parsing end emitting has been merged to reduce code size 4225 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4226 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4227 4228 uint8_t * eir_data; 4229 ad_context_t context; 4230 const uint8_t * name; 4231 uint8_t name_len; 4232 4233 if (size < 3) return; 4234 4235 int event_type = hci_event_packet_get_type(packet); 4236 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4237 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4238 4239 switch (event_type){ 4240 case HCI_EVENT_INQUIRY_RESULT: 4241 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4242 if (size != (3 + (num_responses * 14))) return; 4243 break; 4244 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4245 if (size != 257) return; 4246 if (num_responses != 1) return; 4247 break; 4248 default: 4249 return; 4250 } 4251 4252 // event[1] is set at the end 4253 int i; 4254 for (i=0; i<num_responses;i++){ 4255 memset(event, 0, sizeof(event)); 4256 event[0] = GAP_EVENT_INQUIRY_RESULT; 4257 uint8_t event_size = 18; // if name is not set by EIR 4258 4259 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4260 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4261 (void)memcpy(&event[9], 4262 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4263 3); // class of device 4264 (void)memcpy(&event[12], 4265 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4266 2); // clock offset 4267 4268 switch (event_type){ 4269 case HCI_EVENT_INQUIRY_RESULT: 4270 // 14,15,16,17 = 0, size 18 4271 break; 4272 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4273 event[14] = 1; 4274 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4275 // 16,17 = 0, size 18 4276 break; 4277 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4278 event[14] = 1; 4279 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4280 // for EIR packets, there is only one reponse in it 4281 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4282 name = NULL; 4283 // EIR data is 240 bytes in EIR event 4284 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4285 uint8_t data_type = ad_iterator_get_data_type(&context); 4286 uint8_t data_size = ad_iterator_get_data_len(&context); 4287 const uint8_t * data = ad_iterator_get_data(&context); 4288 // Prefer Complete Local Name over Shortend Local Name 4289 switch (data_type){ 4290 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4291 if (name) continue; 4292 /* fall through */ 4293 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4294 name = data; 4295 name_len = data_size; 4296 break; 4297 default: 4298 break; 4299 } 4300 } 4301 if (name){ 4302 event[16] = 1; 4303 // truncate name if needed 4304 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4305 event[17] = len; 4306 (void)memcpy(&event[18], name, len); 4307 event_size += len; 4308 } 4309 break; 4310 } 4311 event[1] = event_size - 2; 4312 hci_emit_event(event, event_size, 1); 4313 } 4314 } 4315 #endif 4316 4317 void hci_emit_state(void){ 4318 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4319 uint8_t event[3]; 4320 event[0] = BTSTACK_EVENT_STATE; 4321 event[1] = sizeof(event) - 2; 4322 event[2] = hci_stack->state; 4323 hci_emit_event(event, sizeof(event), 1); 4324 } 4325 4326 #ifdef ENABLE_CLASSIC 4327 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4328 uint8_t event[13]; 4329 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4330 event[1] = sizeof(event) - 2; 4331 event[2] = status; 4332 little_endian_store_16(event, 3, con_handle); 4333 reverse_bd_addr(address, &event[5]); 4334 event[11] = 1; // ACL connection 4335 event[12] = 0; // encryption disabled 4336 hci_emit_event(event, sizeof(event), 1); 4337 } 4338 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4339 if (disable_l2cap_timeouts) return; 4340 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4341 uint8_t event[4]; 4342 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4343 event[1] = sizeof(event) - 2; 4344 little_endian_store_16(event, 2, conn->con_handle); 4345 hci_emit_event(event, sizeof(event), 1); 4346 } 4347 #endif 4348 4349 #ifdef ENABLE_BLE 4350 #ifdef ENABLE_LE_CENTRAL 4351 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4352 uint8_t event[21]; 4353 event[0] = HCI_EVENT_LE_META; 4354 event[1] = sizeof(event) - 2; 4355 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4356 event[3] = status; 4357 little_endian_store_16(event, 4, con_handle); 4358 event[6] = 0; // TODO: role 4359 event[7] = address_type; 4360 reverse_bd_addr(address, &event[8]); 4361 little_endian_store_16(event, 14, 0); // interval 4362 little_endian_store_16(event, 16, 0); // latency 4363 little_endian_store_16(event, 18, 0); // supervision timeout 4364 event[20] = 0; // master clock accuracy 4365 hci_emit_event(event, sizeof(event), 1); 4366 } 4367 #endif 4368 #endif 4369 4370 static void hci_emit_transport_packet_sent(void){ 4371 // notify upper stack that it might be possible to send again 4372 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4373 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4374 } 4375 4376 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4377 uint8_t event[6]; 4378 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4379 event[1] = sizeof(event) - 2; 4380 event[2] = 0; // status = OK 4381 little_endian_store_16(event, 3, con_handle); 4382 event[5] = reason; 4383 hci_emit_event(event, sizeof(event), 1); 4384 } 4385 4386 static void hci_emit_nr_connections_changed(void){ 4387 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4388 uint8_t event[3]; 4389 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4390 event[1] = sizeof(event) - 2; 4391 event[2] = nr_hci_connections(); 4392 hci_emit_event(event, sizeof(event), 1); 4393 } 4394 4395 static void hci_emit_hci_open_failed(void){ 4396 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4397 uint8_t event[2]; 4398 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4399 event[1] = sizeof(event) - 2; 4400 hci_emit_event(event, sizeof(event), 1); 4401 } 4402 4403 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4404 log_info("hci_emit_dedicated_bonding_result %u ", status); 4405 uint8_t event[9]; 4406 int pos = 0; 4407 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4408 event[pos++] = sizeof(event) - 2; 4409 event[pos++] = status; 4410 reverse_bd_addr(address, &event[pos]); 4411 hci_emit_event(event, sizeof(event), 1); 4412 } 4413 4414 4415 #ifdef ENABLE_CLASSIC 4416 4417 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4418 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4419 uint8_t event[5]; 4420 int pos = 0; 4421 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4422 event[pos++] = sizeof(event) - 2; 4423 little_endian_store_16(event, 2, con_handle); 4424 pos += 2; 4425 event[pos++] = level; 4426 hci_emit_event(event, sizeof(event), 1); 4427 } 4428 4429 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4430 if (!connection) return LEVEL_0; 4431 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4432 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4433 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4434 // LEVEL 4 always requires 128 bit encrytion key size 4435 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4436 security_level = LEVEL_3; 4437 } 4438 return security_level; 4439 } 4440 4441 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4442 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4443 uint8_t event[3]; 4444 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4445 event[1] = sizeof(event) - 2; 4446 event[2] = enabled; 4447 hci_emit_event(event, sizeof(event), 1); 4448 } 4449 4450 // query if remote side supports eSCO 4451 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4452 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4453 if (!connection) return 0; 4454 return connection->remote_supported_feature_eSCO; 4455 } 4456 4457 // query if remote side supports SSP 4458 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4459 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4460 if (!connection) return 0; 4461 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4462 } 4463 4464 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4465 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4466 } 4467 4468 // GAP API 4469 /** 4470 * @bbrief enable/disable bonding. default is enabled 4471 * @praram enabled 4472 */ 4473 void gap_set_bondable_mode(int enable){ 4474 hci_stack->bondable = enable ? 1 : 0; 4475 } 4476 /** 4477 * @brief Get bondable mode. 4478 * @return 1 if bondable 4479 */ 4480 int gap_get_bondable_mode(void){ 4481 return hci_stack->bondable; 4482 } 4483 4484 /** 4485 * @brief map link keys to security levels 4486 */ 4487 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4488 switch (link_key_type){ 4489 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4490 return LEVEL_4; 4491 case COMBINATION_KEY: 4492 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4493 return LEVEL_3; 4494 default: 4495 return LEVEL_2; 4496 } 4497 } 4498 4499 /** 4500 * @brief map link keys to secure connection yes/no 4501 */ 4502 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4503 switch (link_key_type){ 4504 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4505 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4506 return 1; 4507 default: 4508 return 0; 4509 } 4510 } 4511 4512 /** 4513 * @brief map link keys to authenticated 4514 */ 4515 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4516 switch (link_key_type){ 4517 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4518 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4519 return 1; 4520 default: 4521 return 0; 4522 } 4523 } 4524 4525 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4526 log_info("gap_mitm_protection_required_for_security_level %u", level); 4527 return level > LEVEL_2; 4528 } 4529 4530 /** 4531 * @brief get current security level 4532 */ 4533 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4534 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4535 if (!connection) return LEVEL_0; 4536 return gap_security_level_for_connection(connection); 4537 } 4538 4539 /** 4540 * @brief request connection to device to 4541 * @result GAP_AUTHENTICATION_RESULT 4542 */ 4543 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4544 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4545 if (!connection){ 4546 hci_emit_security_level(con_handle, LEVEL_0); 4547 return; 4548 } 4549 gap_security_level_t current_level = gap_security_level(con_handle); 4550 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4551 requested_level, connection->requested_security_level, current_level); 4552 4553 // assumption: earlier requested security higher than current level => security request is active 4554 if (current_level < connection->requested_security_level){ 4555 if (connection->requested_security_level < requested_level){ 4556 // increase requested level as new level is higher 4557 4558 // TODO: handle re-authentication when done 4559 4560 connection->requested_security_level = requested_level; 4561 } 4562 return; 4563 } 4564 4565 // no request active, notify if security sufficient 4566 if (requested_level <= current_level){ 4567 hci_emit_security_level(con_handle, current_level); 4568 return; 4569 } 4570 4571 // start pairing to increase security level 4572 connection->requested_security_level = requested_level; 4573 4574 #if 0 4575 // sending encryption request without a link key results in an error. 4576 // TODO: figure out how to use it properly 4577 4578 // would enabling ecnryption suffice (>= LEVEL_2)? 4579 if (hci_stack->link_key_db){ 4580 link_key_type_t link_key_type; 4581 link_key_t link_key; 4582 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4583 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4584 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4585 return; 4586 } 4587 } 4588 } 4589 #endif 4590 4591 // start to authenticate connection 4592 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4593 hci_run(); 4594 } 4595 4596 /** 4597 * @brief start dedicated bonding with device. disconnect after bonding 4598 * @param device 4599 * @param request MITM protection 4600 * @result GAP_DEDICATED_BONDING_COMPLETE 4601 */ 4602 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4603 4604 // create connection state machine 4605 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4606 4607 if (!connection){ 4608 return BTSTACK_MEMORY_ALLOC_FAILED; 4609 } 4610 4611 // delete linkn key 4612 gap_drop_link_key_for_bd_addr(device); 4613 4614 // configure LEVEL_2/3, dedicated bonding 4615 connection->state = SEND_CREATE_CONNECTION; 4616 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4617 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4618 connection->bonding_flags = BONDING_DEDICATED; 4619 4620 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4621 4622 // handle: connnection failure (connection complete != ok) 4623 // handle: authentication failure 4624 // handle: disconnect on done 4625 4626 hci_run(); 4627 4628 return 0; 4629 } 4630 #endif 4631 4632 void gap_set_local_name(const char * local_name){ 4633 hci_stack->local_name = local_name; 4634 } 4635 4636 4637 #ifdef ENABLE_BLE 4638 4639 #ifdef ENABLE_LE_CENTRAL 4640 void gap_start_scan(void){ 4641 hci_stack->le_scanning_enabled = 1; 4642 hci_run(); 4643 } 4644 4645 void gap_stop_scan(void){ 4646 hci_stack->le_scanning_enabled = 0; 4647 hci_run(); 4648 } 4649 4650 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4651 hci_stack->le_scan_type = scan_type; 4652 hci_stack->le_scan_interval = scan_interval; 4653 hci_stack->le_scan_window = scan_window; 4654 hci_run(); 4655 } 4656 4657 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4658 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4659 if (!conn){ 4660 log_info("gap_connect: no connection exists yet, creating context"); 4661 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4662 if (!conn){ 4663 // notify client that alloc failed 4664 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4665 log_info("gap_connect: failed to alloc hci_connection_t"); 4666 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4667 } 4668 conn->state = SEND_CREATE_CONNECTION; 4669 log_info("gap_connect: send create connection next"); 4670 hci_run(); 4671 return 0; 4672 } 4673 4674 if (!hci_is_le_connection(conn) || 4675 (conn->state == SEND_CREATE_CONNECTION) || 4676 (conn->state == SENT_CREATE_CONNECTION)) { 4677 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4678 log_error("gap_connect: classic connection or connect is already being created"); 4679 return GATT_CLIENT_IN_WRONG_STATE; 4680 } 4681 4682 log_info("gap_connect: context exists with state %u", conn->state); 4683 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4684 hci_run(); 4685 return 0; 4686 } 4687 4688 // @assumption: only a single outgoing LE Connection exists 4689 static hci_connection_t * gap_get_outgoing_connection(void){ 4690 btstack_linked_item_t *it; 4691 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4692 hci_connection_t * conn = (hci_connection_t *) it; 4693 if (!hci_is_le_connection(conn)) continue; 4694 switch (conn->state){ 4695 case SEND_CREATE_CONNECTION: 4696 case SENT_CREATE_CONNECTION: 4697 case SENT_CANCEL_CONNECTION: 4698 return conn; 4699 default: 4700 break; 4701 }; 4702 } 4703 return NULL; 4704 } 4705 4706 uint8_t gap_connect_cancel(void){ 4707 hci_connection_t * conn = gap_get_outgoing_connection(); 4708 if (!conn) return 0; 4709 switch (conn->state){ 4710 case SEND_CREATE_CONNECTION: 4711 // skip sending create connection and emit event instead 4712 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4713 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4714 btstack_memory_hci_connection_free( conn ); 4715 break; 4716 case SENT_CREATE_CONNECTION: 4717 // request to send cancel connection 4718 conn->state = SEND_CANCEL_CONNECTION; 4719 hci_run(); 4720 break; 4721 default: 4722 break; 4723 } 4724 return 0; 4725 } 4726 #endif 4727 4728 #ifdef ENABLE_LE_CENTRAL 4729 /** 4730 * @brief Set connection parameters for outgoing connections 4731 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4732 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4733 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4734 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4735 * @param conn_latency, default: 4 4736 * @param supervision_timeout (unit: 10ms), default: 720 ms 4737 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4738 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4739 */ 4740 4741 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4742 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4743 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4744 hci_stack->le_connection_scan_interval = conn_scan_interval; 4745 hci_stack->le_connection_scan_window = conn_scan_window; 4746 hci_stack->le_connection_interval_min = conn_interval_min; 4747 hci_stack->le_connection_interval_max = conn_interval_max; 4748 hci_stack->le_connection_latency = conn_latency; 4749 hci_stack->le_supervision_timeout = supervision_timeout; 4750 hci_stack->le_minimum_ce_length = min_ce_length; 4751 hci_stack->le_maximum_ce_length = max_ce_length; 4752 } 4753 #endif 4754 4755 /** 4756 * @brief Updates the connection parameters for a given LE connection 4757 * @param handle 4758 * @param conn_interval_min (unit: 1.25ms) 4759 * @param conn_interval_max (unit: 1.25ms) 4760 * @param conn_latency 4761 * @param supervision_timeout (unit: 10ms) 4762 * @returns 0 if ok 4763 */ 4764 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4765 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4766 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4767 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4768 connection->le_conn_interval_min = conn_interval_min; 4769 connection->le_conn_interval_max = conn_interval_max; 4770 connection->le_conn_latency = conn_latency; 4771 connection->le_supervision_timeout = supervision_timeout; 4772 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4773 hci_run(); 4774 return 0; 4775 } 4776 4777 /** 4778 * @brief Request an update of the connection parameter for a given LE connection 4779 * @param handle 4780 * @param conn_interval_min (unit: 1.25ms) 4781 * @param conn_interval_max (unit: 1.25ms) 4782 * @param conn_latency 4783 * @param supervision_timeout (unit: 10ms) 4784 * @returns 0 if ok 4785 */ 4786 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4787 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4788 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4789 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4790 connection->le_conn_interval_min = conn_interval_min; 4791 connection->le_conn_interval_max = conn_interval_max; 4792 connection->le_conn_latency = conn_latency; 4793 connection->le_supervision_timeout = supervision_timeout; 4794 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4795 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4796 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4797 return 0; 4798 } 4799 4800 #ifdef ENABLE_LE_PERIPHERAL 4801 4802 static void gap_advertisments_changed(void){ 4803 // disable advertisements before updating adv, scan data, or adv params 4804 if (hci_stack->le_advertisements_active){ 4805 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4806 } 4807 hci_run(); 4808 } 4809 4810 /** 4811 * @brief Set Advertisement Data 4812 * @param advertising_data_length 4813 * @param advertising_data (max 31 octets) 4814 * @note data is not copied, pointer has to stay valid 4815 */ 4816 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4817 hci_stack->le_advertisements_data_len = advertising_data_length; 4818 hci_stack->le_advertisements_data = advertising_data; 4819 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4820 gap_advertisments_changed(); 4821 } 4822 4823 /** 4824 * @brief Set Scan Response Data 4825 * @param advertising_data_length 4826 * @param advertising_data (max 31 octets) 4827 * @note data is not copied, pointer has to stay valid 4828 */ 4829 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4830 hci_stack->le_scan_response_data_len = scan_response_data_length; 4831 hci_stack->le_scan_response_data = scan_response_data; 4832 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4833 gap_advertisments_changed(); 4834 } 4835 4836 /** 4837 * @brief Set Advertisement Parameters 4838 * @param adv_int_min 4839 * @param adv_int_max 4840 * @param adv_type 4841 * @param direct_address_type 4842 * @param direct_address 4843 * @param channel_map 4844 * @param filter_policy 4845 * 4846 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4847 */ 4848 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4849 uint8_t direct_address_typ, bd_addr_t direct_address, 4850 uint8_t channel_map, uint8_t filter_policy) { 4851 4852 hci_stack->le_advertisements_interval_min = adv_int_min; 4853 hci_stack->le_advertisements_interval_max = adv_int_max; 4854 hci_stack->le_advertisements_type = adv_type; 4855 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4856 hci_stack->le_advertisements_channel_map = channel_map; 4857 hci_stack->le_advertisements_filter_policy = filter_policy; 4858 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4859 6); 4860 4861 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4862 gap_advertisments_changed(); 4863 } 4864 4865 /** 4866 * @brief Enable/Disable Advertisements 4867 * @param enabled 4868 */ 4869 void gap_advertisements_enable(int enabled){ 4870 hci_stack->le_advertisements_enabled = enabled; 4871 if (enabled && !hci_stack->le_advertisements_active){ 4872 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4873 } 4874 if (!enabled && hci_stack->le_advertisements_active){ 4875 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4876 } 4877 hci_run(); 4878 } 4879 4880 #endif 4881 4882 void hci_le_set_own_address_type(uint8_t own_address_type){ 4883 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4884 if (own_address_type == hci_stack->le_own_addr_type) return; 4885 hci_stack->le_own_addr_type = own_address_type; 4886 4887 #ifdef ENABLE_LE_PERIPHERAL 4888 // update advertisement parameters, too 4889 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4890 gap_advertisments_changed(); 4891 #endif 4892 #ifdef ENABLE_LE_CENTRAL 4893 // note: we don't update scan parameters or modify ongoing connection attempts 4894 #endif 4895 } 4896 4897 #endif 4898 4899 uint8_t gap_disconnect(hci_con_handle_t handle){ 4900 hci_connection_t * conn = hci_connection_for_handle(handle); 4901 if (!conn){ 4902 hci_emit_disconnection_complete(handle, 0); 4903 return 0; 4904 } 4905 // ignore if already disconnected 4906 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4907 return 0; 4908 } 4909 conn->state = SEND_DISCONNECT; 4910 hci_run(); 4911 return 0; 4912 } 4913 4914 int gap_read_rssi(hci_con_handle_t con_handle){ 4915 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4916 if (hci_connection == NULL) return 0; 4917 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4918 hci_run(); 4919 return 1; 4920 } 4921 4922 /** 4923 * @brief Get connection type 4924 * @param con_handle 4925 * @result connection_type 4926 */ 4927 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4928 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4929 if (!conn) return GAP_CONNECTION_INVALID; 4930 switch (conn->address_type){ 4931 case BD_ADDR_TYPE_LE_PUBLIC: 4932 case BD_ADDR_TYPE_LE_RANDOM: 4933 return GAP_CONNECTION_LE; 4934 case BD_ADDR_TYPE_SCO: 4935 return GAP_CONNECTION_SCO; 4936 case BD_ADDR_TYPE_ACL: 4937 return GAP_CONNECTION_ACL; 4938 default: 4939 return GAP_CONNECTION_INVALID; 4940 } 4941 } 4942 4943 #ifdef ENABLE_BLE 4944 4945 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){ 4946 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4947 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4948 4949 conn->le_phy_update_all_phys = all_phys; 4950 conn->le_phy_update_tx_phys = tx_phys; 4951 conn->le_phy_update_rx_phys = rx_phys; 4952 conn->le_phy_update_phy_options = phy_options; 4953 4954 hci_run(); 4955 4956 return 0; 4957 } 4958 4959 #ifdef ENABLE_LE_CENTRAL 4960 /** 4961 * @brief Auto Connection Establishment - Start Connecting to device 4962 * @param address_typ 4963 * @param address 4964 * @returns 0 if ok 4965 */ 4966 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4967 // check capacity 4968 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4969 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4970 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4971 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4972 entry->address_type = address_type; 4973 (void)memcpy(entry->address, address, 6); 4974 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4975 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4976 hci_run(); 4977 return 0; 4978 } 4979 4980 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 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->address_type != address_type) continue; 4986 if (memcmp(entry->address, address, 6) != 0) continue; 4987 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4988 // remove from controller if already present 4989 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4990 continue; 4991 } 4992 // direclty remove entry from whitelist 4993 btstack_linked_list_iterator_remove(&it); 4994 btstack_memory_whitelist_entry_free(entry); 4995 } 4996 } 4997 4998 /** 4999 * @brief Auto Connection Establishment - Stop Connecting to device 5000 * @param address_typ 5001 * @param address 5002 * @returns 0 if ok 5003 */ 5004 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5005 hci_remove_from_whitelist(address_type, address); 5006 hci_run(); 5007 return 0; 5008 } 5009 5010 /** 5011 * @brief Auto Connection Establishment - Stop everything 5012 * @note Convenience function to stop all active auto connection attempts 5013 */ 5014 void gap_auto_connection_stop_all(void){ 5015 btstack_linked_list_iterator_t it; 5016 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5017 while (btstack_linked_list_iterator_has_next(&it)){ 5018 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5019 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5020 // remove from controller if already present 5021 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5022 continue; 5023 } 5024 // directly remove entry from whitelist 5025 btstack_linked_list_iterator_remove(&it); 5026 btstack_memory_whitelist_entry_free(entry); 5027 } 5028 hci_run(); 5029 } 5030 5031 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5032 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5033 if (!conn) return 0; 5034 return conn->le_connection_interval; 5035 } 5036 #endif 5037 #endif 5038 5039 #ifdef ENABLE_CLASSIC 5040 /** 5041 * @brief Set Extended Inquiry Response data 5042 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 5043 * @note has to be done before stack starts up 5044 */ 5045 void gap_set_extended_inquiry_response(const uint8_t * data){ 5046 hci_stack->eir_data = data; 5047 } 5048 5049 /** 5050 * @brief Start GAP Classic Inquiry 5051 * @param duration in 1.28s units 5052 * @return 0 if ok 5053 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5054 */ 5055 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5056 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5057 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5058 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5059 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5060 } 5061 hci_stack->inquiry_state = duration_in_1280ms_units; 5062 hci_run(); 5063 return 0; 5064 } 5065 5066 /** 5067 * @brief Stop GAP Classic Inquiry 5068 * @returns 0 if ok 5069 */ 5070 int gap_inquiry_stop(void){ 5071 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5072 // emit inquiry complete event, before it even started 5073 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5074 hci_emit_event(event, sizeof(event), 1); 5075 return 0; 5076 } 5077 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5078 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5079 hci_run(); 5080 return 0; 5081 } 5082 5083 5084 /** 5085 * @brief Remote Name Request 5086 * @param addr 5087 * @param page_scan_repetition_mode 5088 * @param clock_offset only used when bit 15 is set 5089 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5090 */ 5091 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5092 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5093 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5094 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5095 hci_stack->remote_name_clock_offset = clock_offset; 5096 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5097 hci_run(); 5098 return 0; 5099 } 5100 5101 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5102 hci_stack->gap_pairing_state = state; 5103 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5104 hci_run(); 5105 return 0; 5106 } 5107 5108 /** 5109 * @brief Legacy Pairing Pin Code Response 5110 * @param addr 5111 * @param pin 5112 * @return 0 if ok 5113 */ 5114 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5115 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5116 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5117 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5118 } 5119 5120 /** 5121 * @brief Abort Legacy Pairing 5122 * @param addr 5123 * @param pin 5124 * @return 0 if ok 5125 */ 5126 int gap_pin_code_negative(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_PIN_NEGATIVE); 5129 } 5130 5131 /** 5132 * @brief SSP Passkey Response 5133 * @param addr 5134 * @param passkey 5135 * @return 0 if ok 5136 */ 5137 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5138 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5139 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5140 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5141 } 5142 5143 /** 5144 * @brief Abort SSP Passkey Entry/Pairing 5145 * @param addr 5146 * @param pin 5147 * @return 0 if ok 5148 */ 5149 int gap_ssp_passkey_negative(bd_addr_t addr){ 5150 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5151 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5152 } 5153 5154 /** 5155 * @brief Accept SSP Numeric Comparison 5156 * @param addr 5157 * @param passkey 5158 * @return 0 if ok 5159 */ 5160 int gap_ssp_confirmation_response(bd_addr_t addr){ 5161 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5162 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5163 } 5164 5165 /** 5166 * @brief Abort SSP Numeric Comparison/Pairing 5167 * @param addr 5168 * @param pin 5169 * @return 0 if ok 5170 */ 5171 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5172 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5173 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5174 } 5175 5176 /** 5177 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5178 * @param inquiry_mode see bluetooth_defines.h 5179 */ 5180 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5181 hci_stack->inquiry_mode = mode; 5182 } 5183 5184 /** 5185 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5186 */ 5187 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5188 hci_stack->sco_voice_setting = voice_setting; 5189 } 5190 5191 /** 5192 * @brief Get SCO Voice Setting 5193 * @return current voice setting 5194 */ 5195 uint16_t hci_get_sco_voice_setting(void){ 5196 return hci_stack->sco_voice_setting; 5197 } 5198 5199 static int hci_have_usb_transport(void){ 5200 if (!hci_stack->hci_transport) return 0; 5201 const char * transport_name = hci_stack->hci_transport->name; 5202 if (!transport_name) return 0; 5203 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5204 } 5205 5206 /** @brief Get SCO packet length for current SCO Voice setting 5207 * @note Using SCO packets of the exact length is required for USB transfer 5208 * @return Length of SCO packets in bytes (not audio frames) 5209 */ 5210 int hci_get_sco_packet_length(void){ 5211 int sco_packet_length = 0; 5212 5213 #ifdef ENABLE_SCO_OVER_HCI 5214 5215 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5216 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5217 5218 if (hci_have_usb_transport()){ 5219 // see Core Spec for H2 USB Transfer. 5220 // 3 byte SCO header + 24 bytes per connection 5221 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5222 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5223 } else { 5224 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5225 sco_packet_length = 3 + 60 * multiplier; 5226 // assert that it still fits inside an SCO buffer 5227 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5228 sco_packet_length = 3 + 60; 5229 } 5230 } 5231 #endif 5232 return sco_packet_length; 5233 } 5234 5235 /** 5236 * @brief Sets the master/slave policy 5237 * @param policy (0: attempt to become master, 1: let connecting device decide) 5238 */ 5239 void hci_set_master_slave_policy(uint8_t policy){ 5240 hci_stack->master_slave_policy = policy; 5241 } 5242 5243 #endif 5244 5245 HCI_STATE hci_get_state(void){ 5246 return hci_stack->state; 5247 } 5248 5249 #ifdef ENABLE_CLASSIC 5250 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5251 hci_stack->gap_classic_accept_callback = accept_callback; 5252 } 5253 #endif 5254 5255 /** 5256 * @brief Set callback for Bluetooth Hardware Error 5257 */ 5258 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5259 hci_stack->hardware_error_callback = fn; 5260 } 5261 5262 void hci_disconnect_all(void){ 5263 btstack_linked_list_iterator_t it; 5264 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5265 while (btstack_linked_list_iterator_has_next(&it)){ 5266 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5267 if (con->state == SENT_DISCONNECT) continue; 5268 con->state = SEND_DISCONNECT; 5269 } 5270 hci_run(); 5271 } 5272 5273 uint16_t hci_get_manufacturer(void){ 5274 return hci_stack->manufacturer; 5275 } 5276 5277 #ifdef ENABLE_BLE 5278 5279 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5280 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5281 if (!hci_con) return NULL; 5282 return &hci_con->sm_connection; 5283 } 5284 5285 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5286 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5287 5288 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5289 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5290 if (hci_connection == NULL) return 0; 5291 if (hci_is_le_connection(hci_connection)){ 5292 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5293 if (sm_conn->sm_connection_encrypted) { 5294 return sm_conn->sm_actual_encryption_key_size; 5295 } 5296 } 5297 #ifdef ENABLE_CLASSIC 5298 else { 5299 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5300 return hci_connection->encryption_key_size; 5301 } 5302 } 5303 #endif 5304 return 0; 5305 } 5306 5307 int gap_authenticated(hci_con_handle_t con_handle){ 5308 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5309 if (hci_connection == NULL) return 0; 5310 5311 switch (hci_connection->address_type){ 5312 case BD_ADDR_TYPE_LE_PUBLIC: 5313 case BD_ADDR_TYPE_LE_RANDOM: 5314 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5315 return hci_connection->sm_connection.sm_connection_authenticated; 5316 #ifdef ENABLE_CLASSIC 5317 case BD_ADDR_TYPE_SCO: 5318 case BD_ADDR_TYPE_ACL: 5319 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5320 #endif 5321 default: 5322 return 0; 5323 } 5324 } 5325 5326 int gap_secure_connection(hci_con_handle_t con_handle){ 5327 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5328 if (hci_connection == NULL) return 0; 5329 5330 switch (hci_connection->address_type){ 5331 case BD_ADDR_TYPE_LE_PUBLIC: 5332 case BD_ADDR_TYPE_LE_RANDOM: 5333 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5334 return hci_connection->sm_connection.sm_connection_sc; 5335 #ifdef ENABLE_CLASSIC 5336 case BD_ADDR_TYPE_SCO: 5337 case BD_ADDR_TYPE_ACL: 5338 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5339 #endif 5340 default: 5341 return 0; 5342 } 5343 } 5344 5345 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5346 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5347 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5348 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5349 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5350 return sm_conn->sm_connection_authorization_state; 5351 } 5352 #endif 5353 5354 #ifdef ENABLE_CLASSIC 5355 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){ 5356 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5357 if (!conn) return GAP_CONNECTION_INVALID; 5358 conn->sniff_min_interval = sniff_min_interval; 5359 conn->sniff_max_interval = sniff_max_interval; 5360 conn->sniff_attempt = sniff_attempt; 5361 conn->sniff_timeout = sniff_timeout; 5362 hci_run(); 5363 return 0; 5364 } 5365 5366 /** 5367 * @brief Exit Sniff mode 5368 * @param con_handle 5369 @ @return 0 if ok 5370 */ 5371 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5372 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5373 if (!conn) return GAP_CONNECTION_INVALID; 5374 conn->sniff_min_interval = 0xffff; 5375 hci_run(); 5376 return 0; 5377 } 5378 #endif 5379 5380 void hci_halting_defer(void){ 5381 if (hci_stack->state != HCI_STATE_HALTING) return; 5382 switch (hci_stack->substate){ 5383 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5384 case HCI_HALTING_CLOSE: 5385 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5386 break; 5387 default: 5388 break; 5389 } 5390 } 5391 5392 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5393 void hci_setup_test_connections_fuzz(void){ 5394 hci_connection_t * conn; 5395 5396 // default address: 66:55:44:33:00:01 5397 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5398 5399 // setup Controller info 5400 hci_stack->num_cmd_packets = 255; 5401 hci_stack->acl_packets_total_num = 255; 5402 5403 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5404 addr[5] = 0x01; 5405 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5406 conn->con_handle = addr[5]; 5407 conn->role = HCI_ROLE_SLAVE; 5408 conn->state = RECEIVED_CONNECTION_REQUEST; 5409 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5410 5411 // setup incoming Classic SCO connection with con handle 0x0002 5412 addr[5] = 0x02; 5413 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5414 conn->con_handle = addr[5]; 5415 conn->role = HCI_ROLE_SLAVE; 5416 conn->state = RECEIVED_CONNECTION_REQUEST; 5417 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5418 5419 // setup ready Classic ACL connection with con handle 0x0003 5420 addr[5] = 0x03; 5421 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5422 conn->con_handle = addr[5]; 5423 conn->role = HCI_ROLE_SLAVE; 5424 conn->state = OPEN; 5425 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5426 5427 // setup ready Classic SCO connection with con handle 0x0004 5428 addr[5] = 0x04; 5429 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5430 conn->con_handle = addr[5]; 5431 conn->role = HCI_ROLE_SLAVE; 5432 conn->state = OPEN; 5433 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5434 5435 // setup ready LE ACL connection with con handle 0x005 and public address 5436 addr[5] = 0x05; 5437 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5438 conn->con_handle = addr[5]; 5439 conn->role = HCI_ROLE_SLAVE; 5440 conn->state = OPEN; 5441 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5442 } 5443 5444 void hci_free_connections_fuzz(void){ 5445 btstack_linked_list_iterator_t it; 5446 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5447 while (btstack_linked_list_iterator_has_next(&it)){ 5448 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5449 btstack_linked_list_iterator_remove(&it); 5450 btstack_memory_hci_connection_free(con); 5451 } 5452 } 5453 void hci_simulate_working_fuzz(void){ 5454 hci_init_done(); 5455 hci_stack->num_cmd_packets = 255; 5456 } 5457 #endif 5458