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); 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 static int hci_have_usb_transport(void); 157 158 #ifdef ENABLE_BLE 159 #ifdef ENABLE_LE_CENTRAL 160 // called from test/ble_client/advertising_data_parser.c 161 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 162 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 163 static hci_connection_t * gap_get_outgoing_connection(void); 164 #endif 165 #endif 166 167 // the STACK is here 168 #ifndef HAVE_MALLOC 169 static hci_stack_t hci_stack_static; 170 #endif 171 static hci_stack_t * hci_stack = NULL; 172 173 #ifdef ENABLE_CLASSIC 174 // default name 175 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 176 177 // test helper 178 static uint8_t disable_l2cap_timeouts = 0; 179 #endif 180 181 /** 182 * create connection for given address 183 * 184 * @return connection OR NULL, if no memory left 185 */ 186 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 187 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 188 hci_connection_t * conn = btstack_memory_hci_connection_get(); 189 if (!conn) return NULL; 190 bd_addr_copy(conn->address, addr); 191 conn->address_type = addr_type; 192 conn->con_handle = 0xffff; 193 conn->authentication_flags = AUTH_FLAGS_NONE; 194 conn->bonding_flags = 0; 195 conn->requested_security_level = LEVEL_0; 196 #ifdef ENABLE_CLASSIC 197 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 198 btstack_run_loop_set_timer_context(&conn->timeout, conn); 199 hci_connection_timestamp(conn); 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_packets_sent = 0; 204 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 #ifdef ENABLE_BLE 207 conn->le_phy_update_all_phys = 0xff; 208 #endif 209 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 210 return conn; 211 } 212 213 214 /** 215 * get le connection parameter range 216 * 217 * @return le connection parameter range struct 218 */ 219 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 220 *range = hci_stack->le_connection_parameter_range; 221 } 222 223 /** 224 * set le connection parameter range 225 * 226 */ 227 228 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 229 hci_stack->le_connection_parameter_range = *range; 230 } 231 232 /** 233 * @brief Test if connection parameters are inside in existing rage 234 * @param conn_interval_min (unit: 1.25ms) 235 * @param conn_interval_max (unit: 1.25ms) 236 * @param conn_latency 237 * @param supervision_timeout (unit: 10ms) 238 * @returns 1 if included 239 */ 240 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){ 241 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 242 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 243 244 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 245 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 246 247 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 248 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 249 250 return 1; 251 } 252 253 /** 254 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 255 * @note: default: 1 256 * @param max_peripheral_connections 257 */ 258 #ifdef ENABLE_LE_PERIPHERAL 259 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 260 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 261 } 262 #endif 263 264 /** 265 * get hci connections iterator 266 * 267 * @return hci connections iterator 268 */ 269 270 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 271 btstack_linked_list_iterator_init(it, &hci_stack->connections); 272 } 273 274 /** 275 * get connection for a given handle 276 * 277 * @return connection OR NULL, if not found 278 */ 279 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 280 btstack_linked_list_iterator_t it; 281 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 282 while (btstack_linked_list_iterator_has_next(&it)){ 283 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 284 if ( item->con_handle == con_handle ) { 285 return item; 286 } 287 } 288 return NULL; 289 } 290 291 /** 292 * get connection for given address 293 * 294 * @return connection OR NULL, if not found 295 */ 296 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 297 btstack_linked_list_iterator_t it; 298 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 299 while (btstack_linked_list_iterator_has_next(&it)){ 300 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 301 if (connection->address_type != addr_type) continue; 302 if (memcmp(addr, connection->address, 6) != 0) continue; 303 return connection; 304 } 305 return NULL; 306 } 307 308 309 #ifdef ENABLE_CLASSIC 310 311 #ifdef ENABLE_SCO_OVER_HCI 312 static int hci_number_sco_connections(void){ 313 int connections = 0; 314 btstack_linked_list_iterator_t it; 315 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 316 while (btstack_linked_list_iterator_has_next(&it)){ 317 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 318 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 319 connections++; 320 } 321 return connections; 322 } 323 #endif 324 325 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 326 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 327 #ifdef HAVE_EMBEDDED_TICK 328 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 329 // connections might be timed out 330 hci_emit_l2cap_check_timeout(connection); 331 } 332 #else 333 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 334 // connections might be timed out 335 hci_emit_l2cap_check_timeout(connection); 336 } 337 #endif 338 } 339 340 static void hci_connection_timestamp(hci_connection_t *connection){ 341 #ifdef HAVE_EMBEDDED_TICK 342 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 343 #else 344 connection->timestamp = btstack_run_loop_get_time_ms(); 345 #endif 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 353 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 354 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 355 } 356 357 /** 358 * add authentication flags and reset timer 359 * @note: assumes classic connection 360 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 361 */ 362 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 363 bd_addr_t addr; 364 reverse_bd_addr(bd_addr, addr); 365 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 366 if (conn) { 367 connectionSetAuthenticationFlags(conn, flags); 368 hci_connection_timestamp(conn); 369 } 370 } 371 372 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 373 hci_connection_t * conn = hci_connection_for_handle(handle); 374 if (!conn) return 0; 375 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 376 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 377 return 0; 378 } 379 380 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 381 if (!hci_stack->link_key_db) return; 382 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 383 hci_stack->link_key_db->delete_link_key(addr); 384 } 385 386 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 387 if (!hci_stack->link_key_db) return; 388 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 389 hci_stack->link_key_db->put_link_key(addr, link_key, type); 390 } 391 392 void gap_delete_all_link_keys(void){ 393 bd_addr_t addr; 394 link_key_t link_key; 395 link_key_type_t type; 396 btstack_link_key_iterator_t it; 397 int ok = gap_link_key_iterator_init(&it); 398 if (!ok) { 399 log_error("could not initialize iterator"); 400 return; 401 } 402 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 403 gap_drop_link_key_for_bd_addr(addr); 404 } 405 gap_link_key_iterator_done(&it); 406 } 407 408 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 409 if (!hci_stack->link_key_db) return 0; 410 if (!hci_stack->link_key_db->iterator_init) return 0; 411 return hci_stack->link_key_db->iterator_init(it); 412 } 413 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){ 414 if (!hci_stack->link_key_db) return 0; 415 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 416 } 417 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 418 if (!hci_stack->link_key_db) return; 419 hci_stack->link_key_db->iterator_done(it); 420 } 421 #endif 422 423 static int hci_is_le_connection(hci_connection_t * connection){ 424 switch (connection->address_type){ 425 case BD_ADDR_TYPE_LE_PUBLIC: 426 case BD_ADDR_TYPE_LE_RANDOM: 427 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 429 return 1; 430 default: 431 return 0; 432 } 433 } 434 435 /** 436 * count connections 437 */ 438 static int nr_hci_connections(void){ 439 int count = 0; 440 btstack_linked_item_t *it; 441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 442 return count; 443 } 444 445 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 446 447 unsigned int num_packets_sent_classic = 0; 448 unsigned int num_packets_sent_le = 0; 449 450 btstack_linked_item_t *it; 451 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 452 hci_connection_t * connection = (hci_connection_t *) it; 453 if (hci_is_le_connection(connection)){ 454 num_packets_sent_le += connection->num_packets_sent; 455 } 456 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 457 num_packets_sent_classic += connection->num_packets_sent; 458 } 459 } 460 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 461 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 462 int free_slots_le = 0; 463 464 if (free_slots_classic < 0){ 465 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); 466 return 0; 467 } 468 469 if (hci_stack->le_acl_packets_total_num){ 470 // if we have LE slots, they are used 471 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 472 if (free_slots_le < 0){ 473 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); 474 return 0; 475 } 476 } else { 477 // otherwise, classic slots are used for LE, too 478 free_slots_classic -= num_packets_sent_le; 479 if (free_slots_classic < 0){ 480 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); 481 return 0; 482 } 483 } 484 485 switch (address_type){ 486 case BD_ADDR_TYPE_UNKNOWN: 487 log_error("hci_number_free_acl_slots: unknown address type"); 488 return 0; 489 490 case BD_ADDR_TYPE_CLASSIC: 491 return free_slots_classic; 492 493 default: 494 if (hci_stack->le_acl_packets_total_num){ 495 return free_slots_le; 496 } 497 return free_slots_classic; 498 } 499 } 500 501 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 502 // get connection type 503 hci_connection_t * connection = hci_connection_for_handle(con_handle); 504 if (!connection){ 505 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 506 return 0; 507 } 508 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 509 } 510 511 #ifdef ENABLE_CLASSIC 512 static int hci_number_free_sco_slots(void){ 513 unsigned int num_sco_packets_sent = 0; 514 btstack_linked_item_t *it; 515 if (hci_stack->synchronous_flow_control_enabled){ 516 // explicit flow control 517 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 518 hci_connection_t * connection = (hci_connection_t *) it; 519 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 520 num_sco_packets_sent += connection->num_packets_sent; 521 } 522 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 523 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 524 return 0; 525 } 526 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 527 } else { 528 // implicit flow control -- TODO 529 int num_ready = 0; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 533 if (connection->sco_tx_ready == 0) continue; 534 num_ready++; 535 } 536 return num_ready; 537 } 538 } 539 #endif 540 541 // only used to send HCI Host Number Completed Packets 542 static int hci_can_send_comand_packet_transport(void){ 543 if (hci_stack->hci_packet_buffer_reserved) return 0; 544 545 // check for async hci transport implementations 546 if (hci_stack->hci_transport->can_send_packet_now){ 547 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 548 return 0; 549 } 550 } 551 return 1; 552 } 553 554 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 555 int hci_can_send_command_packet_now(void){ 556 if (hci_can_send_comand_packet_transport() == 0) return 0; 557 return hci_stack->num_cmd_packets > 0; 558 } 559 560 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 561 // check for async hci transport implementations 562 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 563 return hci_stack->hci_transport->can_send_packet_now(packet_type); 564 } 565 566 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 567 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 568 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 569 } 570 571 int hci_can_send_acl_le_packet_now(void){ 572 if (hci_stack->hci_packet_buffer_reserved) return 0; 573 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 574 } 575 576 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 577 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 578 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 579 } 580 581 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 582 if (hci_stack->hci_packet_buffer_reserved) return 0; 583 return hci_can_send_prepared_acl_packet_now(con_handle); 584 } 585 586 #ifdef ENABLE_CLASSIC 587 int hci_can_send_acl_classic_packet_now(void){ 588 if (hci_stack->hci_packet_buffer_reserved) return 0; 589 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 590 } 591 592 int hci_can_send_prepared_sco_packet_now(void){ 593 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 594 if (hci_have_usb_transport()){ 595 return hci_stack->sco_can_send_now; 596 } else { 597 return hci_number_free_sco_slots() > 0; 598 } 599 } 600 601 int hci_can_send_sco_packet_now(void){ 602 if (hci_stack->hci_packet_buffer_reserved) return 0; 603 return hci_can_send_prepared_sco_packet_now(); 604 } 605 606 void hci_request_sco_can_send_now_event(void){ 607 hci_stack->sco_waiting_for_can_send_now = 1; 608 hci_notify_if_sco_can_send_now(); 609 } 610 #endif 611 612 // used for internal checks in l2cap.c 613 int hci_is_packet_buffer_reserved(void){ 614 return hci_stack->hci_packet_buffer_reserved; 615 } 616 617 // reserves outgoing packet buffer. @returns 1 if successful 618 int hci_reserve_packet_buffer(void){ 619 if (hci_stack->hci_packet_buffer_reserved) { 620 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 621 return 0; 622 } 623 hci_stack->hci_packet_buffer_reserved = 1; 624 return 1; 625 } 626 627 void hci_release_packet_buffer(void){ 628 hci_stack->hci_packet_buffer_reserved = 0; 629 } 630 631 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 632 static int hci_transport_synchronous(void){ 633 return hci_stack->hci_transport->can_send_packet_now == NULL; 634 } 635 636 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 637 638 // 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); 639 640 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 641 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 642 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 643 max_acl_data_packet_length = hci_stack->le_data_packets_length; 644 } 645 646 // testing: reduce buffer to minimum 647 // max_acl_data_packet_length = 52; 648 649 log_debug("hci_send_acl_packet_fragments entered"); 650 651 int err; 652 // multiple packets could be send on a synchronous HCI transport 653 while (1){ 654 655 log_debug("hci_send_acl_packet_fragments loop entered"); 656 657 // get current data 658 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 659 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 660 int more_fragments = 0; 661 662 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 663 if (current_acl_data_packet_length > max_acl_data_packet_length){ 664 more_fragments = 1; 665 current_acl_data_packet_length = max_acl_data_packet_length; 666 } 667 668 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 669 if (acl_header_pos > 0){ 670 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 671 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 672 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 673 } 674 675 // update header len 676 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 677 678 // count packet 679 connection->num_packets_sent++; 680 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 681 682 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 683 if (more_fragments){ 684 // update start of next fragment to send 685 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 686 } else { 687 // done 688 hci_stack->acl_fragmentation_pos = 0; 689 hci_stack->acl_fragmentation_total_size = 0; 690 } 691 692 // send packet 693 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 694 const int size = current_acl_data_packet_length + 4; 695 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 696 hci_stack->acl_fragmentation_tx_active = 1; 697 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 698 699 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 700 701 // done yet? 702 if (!more_fragments) break; 703 704 // can send more? 705 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 706 } 707 708 log_debug("hci_send_acl_packet_fragments loop over"); 709 710 // release buffer now for synchronous transport 711 if (hci_transport_synchronous()){ 712 hci_stack->acl_fragmentation_tx_active = 0; 713 hci_release_packet_buffer(); 714 hci_emit_transport_packet_sent(); 715 } 716 717 return err; 718 } 719 720 // pre: caller has reserved the packet buffer 721 int hci_send_acl_packet_buffer(int size){ 722 723 // log_info("hci_send_acl_packet_buffer size %u", size); 724 725 if (!hci_stack->hci_packet_buffer_reserved) { 726 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 727 return 0; 728 } 729 730 uint8_t * packet = hci_stack->hci_packet_buffer; 731 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 732 733 // check for free places on Bluetooth module 734 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 735 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 736 hci_release_packet_buffer(); 737 hci_emit_transport_packet_sent(); 738 return BTSTACK_ACL_BUFFERS_FULL; 739 } 740 741 hci_connection_t *connection = hci_connection_for_handle( con_handle); 742 if (!connection) { 743 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 744 hci_release_packet_buffer(); 745 hci_emit_transport_packet_sent(); 746 return 0; 747 } 748 749 #ifdef ENABLE_CLASSIC 750 hci_connection_timestamp(connection); 751 #endif 752 753 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 754 755 // setup data 756 hci_stack->acl_fragmentation_total_size = size; 757 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 758 759 return hci_send_acl_packet_fragments(connection); 760 } 761 762 #ifdef ENABLE_CLASSIC 763 // pre: caller has reserved the packet buffer 764 int hci_send_sco_packet_buffer(int size){ 765 766 // log_info("hci_send_acl_packet_buffer size %u", size); 767 768 if (!hci_stack->hci_packet_buffer_reserved) { 769 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 770 return 0; 771 } 772 773 uint8_t * packet = hci_stack->hci_packet_buffer; 774 775 // skip checks in loopback mode 776 if (!hci_stack->loopback_mode){ 777 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 778 779 // check for free places on Bluetooth module 780 if (!hci_can_send_prepared_sco_packet_now()) { 781 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 782 hci_release_packet_buffer(); 783 hci_emit_transport_packet_sent(); 784 return BTSTACK_ACL_BUFFERS_FULL; 785 } 786 787 // track send packet in connection struct 788 hci_connection_t *connection = hci_connection_for_handle( con_handle); 789 if (!connection) { 790 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 791 hci_release_packet_buffer(); 792 hci_emit_transport_packet_sent(); 793 return 0; 794 } 795 796 if (hci_have_usb_transport()){ 797 // token used 798 hci_stack->sco_can_send_now = 0; 799 } else { 800 if (hci_stack->synchronous_flow_control_enabled){ 801 connection->num_packets_sent++; 802 } else { 803 connection->sco_tx_ready--; 804 } 805 } 806 } 807 808 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 809 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 810 811 if (hci_transport_synchronous()){ 812 hci_release_packet_buffer(); 813 hci_emit_transport_packet_sent(); 814 } 815 816 return err; 817 } 818 #endif 819 820 static void acl_handler(uint8_t *packet, int size){ 821 822 // log_info("acl_handler: size %u", size); 823 824 // get info 825 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 826 hci_connection_t *conn = hci_connection_for_handle(con_handle); 827 uint8_t acl_flags = READ_ACL_FLAGS(packet); 828 uint16_t acl_length = READ_ACL_LENGTH(packet); 829 830 // ignore non-registered handle 831 if (!conn){ 832 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 833 return; 834 } 835 836 // assert packet is complete 837 if (acl_length + 4 != size){ 838 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 839 return; 840 } 841 842 #ifdef ENABLE_CLASSIC 843 // update idle timestamp 844 hci_connection_timestamp(conn); 845 #endif 846 847 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 848 hci_stack->host_completed_packets = 1; 849 conn->num_packets_completed++; 850 #endif 851 852 // handle different packet types 853 switch (acl_flags & 0x03) { 854 855 case 0x01: // continuation fragment 856 857 // sanity checks 858 if (conn->acl_recombination_pos == 0) { 859 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 860 return; 861 } 862 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 863 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 864 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 865 conn->acl_recombination_pos = 0; 866 return; 867 } 868 869 // append fragment payload (header already stored) 870 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 871 conn->acl_recombination_pos += acl_length; 872 873 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 874 // conn->acl_recombination_pos, conn->acl_recombination_length); 875 876 // forward complete L2CAP packet if complete. 877 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 878 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 879 // reset recombination buffer 880 conn->acl_recombination_length = 0; 881 conn->acl_recombination_pos = 0; 882 } 883 break; 884 885 case 0x02: { // first fragment 886 887 // sanity check 888 if (conn->acl_recombination_pos) { 889 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 890 conn->acl_recombination_pos = 0; 891 } 892 893 // peek into L2CAP packet! 894 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 895 896 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 897 898 // compare fragment size to L2CAP packet size 899 if (acl_length >= l2cap_length + 4){ 900 // forward fragment as L2CAP packet 901 hci_emit_acl_packet(packet, acl_length + 4); 902 } else { 903 904 if (acl_length > HCI_ACL_BUFFER_SIZE){ 905 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 906 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 907 return; 908 } 909 910 // store first fragment and tweak acl length for complete package 911 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 912 conn->acl_recombination_pos = acl_length + 4; 913 conn->acl_recombination_length = l2cap_length; 914 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 915 } 916 break; 917 918 } 919 default: 920 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 921 return; 922 } 923 924 // execute main loop 925 hci_run(); 926 } 927 928 static void hci_shutdown_connection(hci_connection_t *conn){ 929 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 930 931 #ifdef ENABLE_CLASSIC 932 #ifdef ENABLE_SCO_OVER_HCI 933 int addr_type = conn->address_type; 934 #endif 935 #endif 936 937 btstack_run_loop_remove_timer(&conn->timeout); 938 939 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 940 btstack_memory_hci_connection_free( conn ); 941 942 // now it's gone 943 hci_emit_nr_connections_changed(); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 // update SCO 948 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 949 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 950 } 951 #endif 952 #endif 953 } 954 955 #ifdef ENABLE_CLASSIC 956 957 static const uint16_t packet_type_sizes[] = { 958 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 959 HCI_ACL_DH1_SIZE, 0, 0, 0, 960 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 961 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 962 }; 963 static const uint8_t packet_type_feature_requirement_bit[] = { 964 0, // 3 slot packets 965 1, // 5 slot packets 966 25, // EDR 2 mpbs 967 26, // EDR 3 mbps 968 39, // 3 slot EDR packts 969 40, // 5 slot EDR packet 970 }; 971 static const uint16_t packet_type_feature_packet_mask[] = { 972 0x0f00, // 3 slot packets 973 0xf000, // 5 slot packets 974 0x1102, // EDR 2 mpbs 975 0x2204, // EDR 3 mbps 976 0x0300, // 3 slot EDR packts 977 0x3000, // 5 slot EDR packet 978 }; 979 980 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 981 // enable packet types based on size 982 uint16_t packet_types = 0; 983 unsigned int i; 984 for (i=0;i<16;i++){ 985 if (packet_type_sizes[i] == 0) continue; 986 if (packet_type_sizes[i] <= buffer_size){ 987 packet_types |= 1 << i; 988 } 989 } 990 // disable packet types due to missing local supported features 991 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 992 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 993 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 994 if (feature_set) continue; 995 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 996 packet_types &= ~packet_type_feature_packet_mask[i]; 997 } 998 // flip bits for "may not be used" 999 packet_types ^= 0x3306; 1000 return packet_types; 1001 } 1002 1003 uint16_t hci_usable_acl_packet_types(void){ 1004 return hci_stack->packet_types; 1005 } 1006 #endif 1007 1008 uint8_t* hci_get_outgoing_packet_buffer(void){ 1009 // hci packet buffer is >= acl data packet length 1010 return hci_stack->hci_packet_buffer; 1011 } 1012 1013 uint16_t hci_max_acl_data_packet_length(void){ 1014 return hci_stack->acl_data_packet_length; 1015 } 1016 1017 #ifdef ENABLE_CLASSIC 1018 int hci_extended_sco_link_supported(void){ 1019 // No. 31, byte 3, bit 7 1020 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1021 } 1022 #endif 1023 1024 int hci_non_flushable_packet_boundary_flag_supported(void){ 1025 // No. 54, byte 6, bit 6 1026 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1027 } 1028 1029 static int gap_ssp_supported(void){ 1030 // No. 51, byte 6, bit 3 1031 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1032 } 1033 1034 static int hci_classic_supported(void){ 1035 #ifdef ENABLE_CLASSIC 1036 // No. 37, byte 4, bit 5, = No BR/EDR Support 1037 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1038 #else 1039 return 0; 1040 #endif 1041 } 1042 1043 static int hci_le_supported(void){ 1044 #ifdef ENABLE_BLE 1045 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1046 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1047 #else 1048 return 0; 1049 #endif 1050 } 1051 1052 #ifdef ENABLE_BLE 1053 1054 /** 1055 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1056 */ 1057 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1058 *addr_type = hci_stack->le_own_addr_type; 1059 if (hci_stack->le_own_addr_type){ 1060 memcpy(addr, hci_stack->le_random_address, 6); 1061 } else { 1062 memcpy(addr, hci_stack->local_bd_addr, 6); 1063 } 1064 } 1065 1066 #ifdef ENABLE_LE_CENTRAL 1067 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1068 1069 int offset = 3; 1070 int num_reports = packet[offset]; 1071 offset += 1; 1072 1073 int i; 1074 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1075 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1076 for (i=0; i<num_reports && offset < size;i++){ 1077 // sanity checks on data_length: 1078 uint8_t data_length = packet[offset + 8]; 1079 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1080 if (offset + 9 + data_length + 1 > size) return; 1081 // setup event 1082 uint8_t event_size = 10 + data_length; 1083 int pos = 0; 1084 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1085 event[pos++] = event_size; 1086 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1087 offset += 8; 1088 pos += 8; 1089 event[pos++] = packet[offset + 1 + data_length]; // rssi 1090 event[pos++] = data_length; 1091 offset++; 1092 memcpy(&event[pos], &packet[offset], data_length); 1093 pos += data_length; 1094 offset += data_length + 1; // rssi 1095 hci_emit_event(event, pos, 1); 1096 } 1097 } 1098 #endif 1099 #endif 1100 1101 #ifdef ENABLE_BLE 1102 #ifdef ENABLE_LE_PERIPHERAL 1103 static void hci_reenable_advertisements_if_needed(void){ 1104 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1105 // get number of active le slave connections 1106 int num_slave_connections = 0; 1107 btstack_linked_list_iterator_t it; 1108 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1109 while (btstack_linked_list_iterator_has_next(&it)){ 1110 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1111 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1112 if (con->state != OPEN) continue; 1113 if (con->role != HCI_ROLE_SLAVE) continue; 1114 if (!hci_is_le_connection(con)) continue; 1115 num_slave_connections++; 1116 } 1117 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1118 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1119 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1120 } 1121 } 1122 } 1123 #endif 1124 #endif 1125 1126 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1127 1128 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1129 if (!hci_stack->config) return 0; 1130 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1131 // Limit baud rate for Broadcom chipsets to 3 mbps 1132 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1133 baud_rate = 3000000; 1134 } 1135 return baud_rate; 1136 } 1137 1138 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1139 UNUSED(ds); 1140 1141 switch (hci_stack->substate){ 1142 case HCI_INIT_W4_SEND_RESET: 1143 log_info("Resend HCI Reset"); 1144 hci_stack->substate = HCI_INIT_SEND_RESET; 1145 hci_stack->num_cmd_packets = 1; 1146 hci_run(); 1147 break; 1148 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1149 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1150 if (hci_stack->hci_transport->reset_link){ 1151 hci_stack->hci_transport->reset_link(); 1152 } 1153 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1154 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1155 log_info("Resend HCI Reset - CSR Warm Boot"); 1156 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1157 hci_stack->num_cmd_packets = 1; 1158 hci_run(); 1159 break; 1160 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1161 if (hci_stack->hci_transport->set_baudrate){ 1162 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1163 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1164 hci_stack->hci_transport->set_baudrate(baud_rate); 1165 } 1166 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1167 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1168 if (hci_stack->hci_transport->reset_link){ 1169 log_info("Link Reset"); 1170 hci_stack->hci_transport->reset_link(); 1171 } 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_run(); 1174 } 1175 break; 1176 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1177 // otherwise continue 1178 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1179 hci_send_cmd(&hci_read_local_supported_commands); 1180 break; 1181 default: 1182 break; 1183 } 1184 } 1185 #endif 1186 1187 static void hci_initializing_next_state(void){ 1188 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1189 } 1190 1191 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1192 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1193 const int bd_addr_string_len = 17; 1194 int i = 0; 1195 while (i < size - bd_addr_string_len){ 1196 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1197 i++; 1198 continue; 1199 } 1200 // set real address 1201 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1202 i += bd_addr_string_len; 1203 } 1204 } 1205 #endif 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3 + hci_stack->hci_packet_buffer[2]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1315 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1330 // -> Work around: wait a few milliseconds here. 1331 log_info("BCM delay after init script"); 1332 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1333 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1334 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1335 btstack_run_loop_add_timer(&hci_stack->timeout); 1336 break; 1337 } 1338 } 1339 // otherwise continue 1340 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1341 hci_send_cmd(&hci_read_local_supported_commands); 1342 break; 1343 case HCI_INIT_SET_BD_ADDR: 1344 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1345 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1346 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1347 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1348 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1349 break; 1350 #endif 1351 1352 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1353 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1354 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1355 hci_send_cmd(&hci_read_local_supported_commands); 1356 break; 1357 case HCI_INIT_READ_BD_ADDR: 1358 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1359 hci_send_cmd(&hci_read_bd_addr); 1360 break; 1361 case HCI_INIT_READ_BUFFER_SIZE: 1362 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1363 hci_send_cmd(&hci_read_buffer_size); 1364 break; 1365 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1366 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1367 hci_send_cmd(&hci_read_local_supported_features); 1368 break; 1369 1370 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1371 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1372 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1373 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1374 break; 1375 case HCI_INIT_HOST_BUFFER_SIZE: 1376 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1377 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1378 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1379 break; 1380 #endif 1381 1382 case HCI_INIT_SET_EVENT_MASK: 1383 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1384 if (hci_le_supported()){ 1385 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1386 } else { 1387 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1388 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1389 } 1390 break; 1391 1392 #ifdef ENABLE_CLASSIC 1393 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1394 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1395 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1396 break; 1397 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1398 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1399 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1400 break; 1401 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1403 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1404 break; 1405 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1407 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1408 break; 1409 case HCI_INIT_WRITE_LOCAL_NAME: { 1410 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1411 hci_reserve_packet_buffer(); 1412 uint8_t * packet = hci_stack->hci_packet_buffer; 1413 // construct HCI Command and send 1414 uint16_t opcode = hci_write_local_name.opcode; 1415 hci_stack->last_cmd_opcode = opcode; 1416 packet[0] = opcode & 0xff; 1417 packet[1] = opcode >> 8; 1418 packet[2] = DEVICE_NAME_LEN; 1419 memset(&packet[3], 0, DEVICE_NAME_LEN); 1420 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1421 // expand '00:00:00:00:00:00' in name with bd_addr 1422 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1423 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1424 break; 1425 } 1426 case HCI_INIT_WRITE_EIR_DATA: { 1427 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1428 hci_reserve_packet_buffer(); 1429 uint8_t * packet = hci_stack->hci_packet_buffer; 1430 // construct HCI Command and send 1431 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1432 hci_stack->last_cmd_opcode = opcode; 1433 packet[0] = opcode & 0xff; 1434 packet[1] = opcode >> 8; 1435 packet[2] = 1 + 240; 1436 packet[3] = 0; // FEC not required 1437 if (hci_stack->eir_data){ 1438 memcpy(&packet[4], hci_stack->eir_data, 240); 1439 } else { 1440 memset(&packet[4], 0, 240); 1441 int name_len = strlen(hci_stack->local_name); 1442 packet[4] = name_len + 1; 1443 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1444 memcpy(&packet[6], hci_stack->local_name, name_len); 1445 } 1446 // expand '00:00:00:00:00:00' in name with bd_addr 1447 hci_replace_bd_addr_placeholder(&packet[4], 240); 1448 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1449 break; 1450 } 1451 case HCI_INIT_WRITE_INQUIRY_MODE: 1452 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1453 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1454 break; 1455 case HCI_INIT_WRITE_SCAN_ENABLE: 1456 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1457 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1458 break; 1459 // only sent if ENABLE_SCO_OVER_HCI is defined 1460 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1461 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1462 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1463 break; 1464 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1465 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1466 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1467 break; 1468 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1469 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1470 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1471 log_info("BCM: Route SCO data via HCI transport"); 1472 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1473 break; 1474 1475 #endif 1476 #ifdef ENABLE_BLE 1477 // LE INIT 1478 case HCI_INIT_LE_READ_BUFFER_SIZE: 1479 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1480 hci_send_cmd(&hci_le_read_buffer_size); 1481 break; 1482 case HCI_INIT_LE_SET_EVENT_MASK: 1483 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1484 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1485 break; 1486 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1487 // LE Supported Host = 1, Simultaneous Host = 0 1488 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1489 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1490 break; 1491 #endif 1492 1493 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1494 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1495 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1496 hci_send_cmd(&hci_le_read_maximum_data_length); 1497 break; 1498 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1499 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1500 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1501 break; 1502 #endif 1503 1504 #ifdef ENABLE_LE_CENTRAL 1505 case HCI_INIT_READ_WHITE_LIST_SIZE: 1506 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1507 hci_send_cmd(&hci_le_read_white_list_size); 1508 break; 1509 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1510 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1511 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1512 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); 1513 break; 1514 #endif 1515 default: 1516 return; 1517 } 1518 } 1519 1520 static void hci_init_done(void){ 1521 // done. tell the app 1522 log_info("hci_init_done -> HCI_STATE_WORKING"); 1523 hci_stack->state = HCI_STATE_WORKING; 1524 hci_emit_state(); 1525 hci_run(); 1526 } 1527 1528 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1529 1530 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1531 1532 uint8_t command_completed = 0; 1533 1534 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1535 uint16_t opcode = little_endian_read_16(packet,3); 1536 if (opcode == hci_stack->last_cmd_opcode){ 1537 command_completed = 1; 1538 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1539 } else { 1540 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1541 } 1542 } 1543 1544 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1545 uint8_t status = packet[2]; 1546 uint16_t opcode = little_endian_read_16(packet,4); 1547 if (opcode == hci_stack->last_cmd_opcode){ 1548 if (status){ 1549 command_completed = 1; 1550 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1551 } else { 1552 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1553 } 1554 } else { 1555 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1556 } 1557 } 1558 1559 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1560 1561 // Vendor == CSR 1562 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1563 // TODO: track actual command 1564 command_completed = 1; 1565 } 1566 1567 // Vendor == Toshiba 1568 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1569 // TODO: track actual command 1570 command_completed = 1; 1571 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1572 hci_stack->num_cmd_packets = 1; 1573 } 1574 1575 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1576 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1577 // 1578 // HCI Reset 1579 // Timeout 100 ms 1580 // HCI Reset 1581 // Command Complete Reset 1582 // HCI Read Local Version Information 1583 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1584 // hang... 1585 // 1586 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1587 if (!command_completed 1588 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1589 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1590 1591 uint16_t opcode = little_endian_read_16(packet,3); 1592 if (opcode == hci_reset.opcode){ 1593 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1594 return; 1595 } 1596 } 1597 1598 // CSR & H5 1599 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1600 if (!command_completed 1601 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1602 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1603 1604 uint16_t opcode = little_endian_read_16(packet,3); 1605 if (opcode == hci_reset.opcode){ 1606 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1607 return; 1608 } 1609 } 1610 1611 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1612 // fix: Correct substate and behave as command below 1613 if (command_completed){ 1614 switch (hci_stack->substate){ 1615 case HCI_INIT_SEND_RESET: 1616 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1617 break; 1618 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1619 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1620 break; 1621 default: 1622 break; 1623 } 1624 } 1625 1626 #endif 1627 1628 if (!command_completed) return; 1629 1630 int need_baud_change = 0; 1631 int need_addr_change = 0; 1632 1633 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1634 need_baud_change = hci_stack->config 1635 && hci_stack->chipset 1636 && hci_stack->chipset->set_baudrate_command 1637 && hci_stack->hci_transport->set_baudrate 1638 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1639 1640 need_addr_change = hci_stack->custom_bd_addr_set 1641 && hci_stack->chipset 1642 && hci_stack->chipset->set_bd_addr_command; 1643 #endif 1644 1645 switch(hci_stack->substate){ 1646 1647 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1648 case HCI_INIT_SEND_RESET: 1649 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1650 // fix: just correct substate and behave as command below 1651 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1652 btstack_run_loop_remove_timer(&hci_stack->timeout); 1653 break; 1654 case HCI_INIT_W4_SEND_RESET: 1655 btstack_run_loop_remove_timer(&hci_stack->timeout); 1656 break; 1657 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1658 log_info("Received local name, need baud change %d", need_baud_change); 1659 if (need_baud_change){ 1660 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1661 return; 1662 } 1663 // skip baud change 1664 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1665 return; 1666 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1667 // for STLC2500D, baud rate change already happened. 1668 // for others, baud rate gets changed now 1669 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1670 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1671 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1672 hci_stack->hci_transport->set_baudrate(baud_rate); 1673 } 1674 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1675 return; 1676 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1677 btstack_run_loop_remove_timer(&hci_stack->timeout); 1678 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1679 return; 1680 case HCI_INIT_W4_CUSTOM_INIT: 1681 // repeat custom init 1682 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1683 return; 1684 #else 1685 case HCI_INIT_W4_SEND_RESET: 1686 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1687 return ; 1688 #endif 1689 1690 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1691 if (need_baud_change && hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT && 1692 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1693 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1694 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1695 return; 1696 } 1697 if (need_addr_change){ 1698 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1699 return; 1700 } 1701 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1702 return; 1703 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1704 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1705 if (need_baud_change){ 1706 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1707 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1708 hci_stack->hci_transport->set_baudrate(baud_rate); 1709 } 1710 if (need_addr_change){ 1711 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1712 return; 1713 } 1714 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1715 return; 1716 case HCI_INIT_W4_SET_BD_ADDR: 1717 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1718 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1719 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1720 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1721 return; 1722 } 1723 // skipping st warm boot 1724 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1725 return; 1726 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1727 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1728 return; 1729 #endif 1730 case HCI_INIT_W4_READ_BD_ADDR: 1731 // only read buffer size if supported 1732 if (hci_stack->local_supported_commands[0] & 0x01) { 1733 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1734 return; 1735 } 1736 // skipping read buffer size 1737 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1738 return; 1739 case HCI_INIT_W4_SET_EVENT_MASK: 1740 // skip Classic init commands for LE only chipsets 1741 if (!hci_classic_supported()){ 1742 #ifdef ENABLE_BLE 1743 if (hci_le_supported()){ 1744 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1745 return; 1746 } 1747 #endif 1748 log_error("Neither BR/EDR nor LE supported"); 1749 hci_init_done(); 1750 return; 1751 } 1752 if (!gap_ssp_supported()){ 1753 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1754 return; 1755 } 1756 break; 1757 #ifdef ENABLE_BLE 1758 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1759 // skip write le host if not supported (e.g. on LE only EM9301) 1760 if (hci_stack->local_supported_commands[0] & 0x02) break; 1761 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1762 return; 1763 1764 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1765 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1766 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1767 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1768 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1769 return; 1770 } 1771 // explicit fall through to reduce repetitions 1772 1773 #ifdef ENABLE_LE_CENTRAL 1774 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1775 #else 1776 hci_init_done(); 1777 #endif 1778 return; 1779 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1780 1781 #endif /* ENABLE_BLE */ 1782 1783 #ifdef ENABLE_SCO_OVER_HCI 1784 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1785 // skip write synchronous flow control if not supported 1786 if (hci_stack->local_supported_commands[0] & 0x04) break; 1787 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1788 // explicit fall through to reduce repetitions 1789 1790 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1791 // skip write default erroneous data reporting if not supported 1792 if (hci_stack->local_supported_commands[0] & 0x08) break; 1793 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1794 // explicit fall through to reduce repetitions 1795 1796 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1797 // skip bcm set sco pcm config on non-Broadcom chipsets 1798 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1799 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1800 // explicit fall through to reduce repetitions 1801 1802 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1803 if (!hci_le_supported()){ 1804 // SKIP LE init for Classic only configuration 1805 hci_init_done(); 1806 return; 1807 } 1808 break; 1809 1810 #else /* !ENABLE_SCO_OVER_HCI */ 1811 1812 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1813 #ifdef ENABLE_BLE 1814 if (hci_le_supported()){ 1815 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1816 return; 1817 } 1818 #endif 1819 // SKIP LE init for Classic only configuration 1820 hci_init_done(); 1821 return; 1822 #endif /* ENABLE_SCO_OVER_HCI */ 1823 1824 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1825 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1826 // Response to command before init done state -> init done 1827 case (HCI_INIT_DONE-1): 1828 hci_init_done(); 1829 return; 1830 #endif 1831 1832 default: 1833 break; 1834 } 1835 hci_initializing_next_state(); 1836 } 1837 1838 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1839 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1840 bd_addr_t bd_address; 1841 memcpy(&bd_address, conn->address, 6); 1842 1843 #ifdef ENABLE_CLASSIC 1844 // cache needed data 1845 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1846 #endif 1847 1848 // connection failed, remove entry 1849 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1850 btstack_memory_hci_connection_free( conn ); 1851 1852 #ifdef ENABLE_CLASSIC 1853 // notify client if dedicated bonding 1854 if (notify_dedicated_bonding_failed){ 1855 log_info("hci notify_dedicated_bonding_failed"); 1856 hci_emit_dedicated_bonding_result(bd_address, status); 1857 } 1858 1859 // if authentication error, also delete link key 1860 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1861 gap_drop_link_key_for_bd_addr(bd_address); 1862 } 1863 #endif 1864 } 1865 1866 static void event_handler(uint8_t *packet, int size){ 1867 1868 uint16_t event_length = packet[1]; 1869 1870 // assert packet is complete 1871 if (size != event_length + 2){ 1872 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1873 return; 1874 } 1875 1876 bd_addr_t addr; 1877 bd_addr_type_t addr_type; 1878 hci_con_handle_t handle; 1879 hci_connection_t * conn; 1880 int i; 1881 int create_connection_cmd; 1882 1883 #ifdef ENABLE_CLASSIC 1884 uint8_t link_type; 1885 #endif 1886 1887 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1888 1889 switch (hci_event_packet_get_type(packet)) { 1890 1891 case HCI_EVENT_COMMAND_COMPLETE: 1892 // get num cmd packets - limit to 1 to reduce complexity 1893 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1894 1895 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1896 if (packet[5]) break; 1897 // terminate, name 248 chars 1898 packet[6+248] = 0; 1899 log_info("local name: %s", &packet[6]); 1900 } 1901 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1902 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1903 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1904 uint16_t acl_len = little_endian_read_16(packet, 6); 1905 uint16_t sco_len = packet[8]; 1906 1907 // determine usable ACL/SCO payload size 1908 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1909 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1910 1911 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1912 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1913 1914 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1915 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1916 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1917 } 1918 } 1919 #ifdef ENABLE_BLE 1920 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1921 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1922 hci_stack->le_acl_packets_total_num = packet[8]; 1923 // determine usable ACL payload size 1924 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1925 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1926 } 1927 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1928 } 1929 #endif 1930 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1931 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1932 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1933 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1934 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); 1935 } 1936 #endif 1937 #ifdef ENABLE_LE_CENTRAL 1938 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1939 hci_stack->le_whitelist_capacity = packet[6]; 1940 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1941 } 1942 #endif 1943 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1944 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1945 hci_stack->local_bd_addr); 1946 log_info("Local Address, Status: 0x%02x: Addr: %s", 1947 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1948 #ifdef ENABLE_CLASSIC 1949 if (hci_stack->link_key_db){ 1950 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1951 } 1952 #endif 1953 } 1954 #ifdef ENABLE_CLASSIC 1955 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1956 hci_emit_discoverable_enabled(hci_stack->discoverable); 1957 } 1958 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1959 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1960 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1961 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1962 hci_emit_event(event, sizeof(event), 1); 1963 } 1964 } 1965 #endif 1966 1967 // Note: HCI init checks 1968 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1969 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1970 1971 #ifdef ENABLE_CLASSIC 1972 // determine usable ACL packet types based on host buffer size and supported features 1973 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1974 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1975 #endif 1976 // Classic/LE 1977 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1978 } 1979 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1980 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1981 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1982 uint16_t manufacturer = little_endian_read_16(packet, 10); 1983 // map Cypress to Broadcom 1984 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 1985 log_info("Treat Cypress as Broadcom"); 1986 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 1987 little_endian_store_16(packet, 10, manufacturer); 1988 } 1989 hci_stack->manufacturer = manufacturer; 1990 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1991 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1992 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1993 } 1994 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1995 hci_stack->local_supported_commands[0] = 1996 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 1997 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 1998 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 1999 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2000 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2001 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2002 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2003 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2004 } 2005 #ifdef ENABLE_CLASSIC 2006 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2007 if (packet[5] == 0){ 2008 hci_stack->synchronous_flow_control_enabled = 1; 2009 } 2010 } 2011 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2012 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2013 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2014 conn = hci_connection_for_handle(handle); 2015 if (!conn) break; 2016 if (status == 0){ 2017 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2018 log_info("Handle %x04x key Size: %u", handle, key_size); 2019 conn->encryption_key_size = key_size; 2020 } else { 2021 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2022 conn->encryption_key_size = 1; 2023 } 2024 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2025 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2026 } 2027 #endif 2028 break; 2029 2030 case HCI_EVENT_COMMAND_STATUS: 2031 // get num cmd packets - limit to 1 to reduce complexity 2032 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2033 2034 // check command status to detected failed outgoing connections 2035 create_connection_cmd = 0; 2036 #ifdef ENABLE_CLASSIC 2037 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2038 create_connection_cmd = 1; 2039 } 2040 #endif 2041 #ifdef ENABLE_LE_CENTRAL 2042 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2043 create_connection_cmd = 1; 2044 } 2045 #endif 2046 if (create_connection_cmd) { 2047 uint8_t status = hci_event_command_status_get_status(packet); 2048 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2049 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); 2050 2051 // reset outgoing address info 2052 memset(hci_stack->outgoing_addr, 0, 6); 2053 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2054 2055 // error => outgoing connection failed 2056 if ((conn != NULL) && (status != 0)){ 2057 hci_handle_connection_failed(conn, status); 2058 } 2059 } 2060 break; 2061 2062 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2063 int offset = 3; 2064 for (i=0; i<packet[2];i++){ 2065 handle = little_endian_read_16(packet, offset) & 0x0fff; 2066 offset += 2; 2067 uint16_t num_packets = little_endian_read_16(packet, offset); 2068 offset += 2; 2069 2070 conn = hci_connection_for_handle(handle); 2071 if (!conn){ 2072 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2073 continue; 2074 } 2075 2076 if (conn->num_packets_sent >= num_packets){ 2077 conn->num_packets_sent -= num_packets; 2078 } else { 2079 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2080 conn->num_packets_sent = 0; 2081 } 2082 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2083 2084 #ifdef ENABLE_CLASSIC 2085 // For SCO, we do the can_send_now_check here 2086 hci_notify_if_sco_can_send_now(); 2087 #endif 2088 } 2089 break; 2090 } 2091 2092 #ifdef ENABLE_CLASSIC 2093 case HCI_EVENT_INQUIRY_COMPLETE: 2094 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2095 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2096 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2097 hci_emit_event(event, sizeof(event), 1); 2098 } 2099 break; 2100 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2101 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2102 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2103 } 2104 break; 2105 case HCI_EVENT_CONNECTION_REQUEST: 2106 reverse_bd_addr(&packet[2], addr); 2107 // TODO: eval COD 8-10 2108 link_type = packet[11]; 2109 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2110 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2111 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2112 if (!conn) { 2113 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2114 } 2115 if (!conn) { 2116 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2117 hci_stack->decline_reason = 0x0d; 2118 bd_addr_copy(hci_stack->decline_addr, addr); 2119 break; 2120 } 2121 conn->role = HCI_ROLE_SLAVE; 2122 conn->state = RECEIVED_CONNECTION_REQUEST; 2123 // store info about eSCO 2124 if (link_type == 0x02){ 2125 conn->remote_supported_feature_eSCO = 1; 2126 } 2127 hci_run(); 2128 break; 2129 2130 case HCI_EVENT_CONNECTION_COMPLETE: 2131 // Connection management 2132 reverse_bd_addr(&packet[5], addr); 2133 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2134 addr_type = BD_ADDR_TYPE_CLASSIC; 2135 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2136 if (conn) { 2137 if (!packet[2]){ 2138 conn->state = OPEN; 2139 conn->con_handle = little_endian_read_16(packet, 3); 2140 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2141 2142 // restart timer 2143 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2144 btstack_run_loop_add_timer(&conn->timeout); 2145 2146 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2147 2148 hci_emit_nr_connections_changed(); 2149 } else { 2150 // connection failed 2151 hci_handle_connection_failed(conn, packet[2]); 2152 } 2153 } 2154 break; 2155 2156 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2157 reverse_bd_addr(&packet[5], addr); 2158 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2159 if (packet[2]){ 2160 // connection failed 2161 break; 2162 } 2163 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2164 if (!conn) { 2165 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2166 } 2167 if (!conn) { 2168 break; 2169 } 2170 conn->state = OPEN; 2171 conn->con_handle = little_endian_read_16(packet, 3); 2172 2173 #ifdef ENABLE_SCO_OVER_HCI 2174 // update SCO 2175 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2176 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2177 } 2178 // trigger can send now 2179 if (hci_have_usb_transport()){ 2180 hci_stack->sco_can_send_now = 1; 2181 } 2182 #endif 2183 break; 2184 2185 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2186 handle = little_endian_read_16(packet, 3); 2187 conn = hci_connection_for_handle(handle); 2188 if (!conn) break; 2189 if (!packet[2]){ 2190 uint8_t * features = &packet[5]; 2191 if (features[6] & (1 << 3)){ 2192 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2193 } 2194 if (features[3] & (1<<7)){ 2195 conn->remote_supported_feature_eSCO = 1; 2196 } 2197 } 2198 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2199 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2200 if (conn->bonding_flags & BONDING_DEDICATED){ 2201 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2202 } 2203 break; 2204 2205 case HCI_EVENT_LINK_KEY_REQUEST: 2206 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2207 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2208 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2209 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2210 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2211 hci_run(); 2212 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2213 return; 2214 2215 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2216 reverse_bd_addr(&packet[2], addr); 2217 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2218 if (!conn) break; 2219 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2220 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2221 // Change Connection Encryption keeps link key type 2222 if (link_key_type != CHANGED_COMBINATION_KEY){ 2223 conn->link_key_type = link_key_type; 2224 } 2225 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2226 // still forward event to allow dismiss of pairing dialog 2227 break; 2228 } 2229 2230 case HCI_EVENT_PIN_CODE_REQUEST: 2231 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2232 // non-bondable mode: pin code negative reply will be sent 2233 if (!hci_stack->bondable){ 2234 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2235 hci_run(); 2236 return; 2237 } 2238 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2239 if (!hci_stack->link_key_db) break; 2240 hci_event_pin_code_request_get_bd_addr(packet, addr); 2241 hci_stack->link_key_db->delete_link_key(addr); 2242 break; 2243 2244 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2245 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2246 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2247 break; 2248 2249 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2250 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2251 if (!hci_stack->ssp_auto_accept) break; 2252 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2253 break; 2254 2255 case HCI_EVENT_USER_PASSKEY_REQUEST: 2256 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2257 if (!hci_stack->ssp_auto_accept) break; 2258 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2259 break; 2260 case HCI_EVENT_MODE_CHANGE: 2261 handle = hci_event_mode_change_get_handle(packet); 2262 conn = hci_connection_for_handle(handle); 2263 if (!conn) break; 2264 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2265 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2266 break; 2267 #endif 2268 2269 case HCI_EVENT_ENCRYPTION_CHANGE: 2270 handle = little_endian_read_16(packet, 3); 2271 conn = hci_connection_for_handle(handle); 2272 if (!conn) break; 2273 if (packet[2] == 0) { 2274 if (packet[5]){ 2275 if (hci_is_le_connection(conn)){ 2276 // For LE, we accept connection as encrypted 2277 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2278 } 2279 #ifdef ENABLE_CLASSIC 2280 else { 2281 // For Classic, we need to validate encryption key size first 2282 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2283 } 2284 #endif 2285 } else { 2286 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2287 } 2288 } 2289 2290 break; 2291 2292 #ifdef ENABLE_CLASSIC 2293 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2294 handle = little_endian_read_16(packet, 3); 2295 conn = hci_connection_for_handle(handle); 2296 if (!conn) break; 2297 2298 // dedicated bonding: send result and disconnect 2299 if (conn->bonding_flags & BONDING_DEDICATED){ 2300 conn->bonding_flags &= ~BONDING_DEDICATED; 2301 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2302 conn->bonding_status = packet[2]; 2303 break; 2304 } 2305 2306 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2307 // link key sufficient for requested security 2308 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2309 break; 2310 } 2311 // not enough 2312 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2313 break; 2314 #endif 2315 2316 // HCI_EVENT_DISCONNECTION_COMPLETE 2317 // has been split, to first notify stack before shutting connection down 2318 // see end of function, too. 2319 case HCI_EVENT_DISCONNECTION_COMPLETE: 2320 if (packet[2]) break; // status != 0 2321 handle = little_endian_read_16(packet, 3); 2322 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2323 if (hci_stack->acl_fragmentation_total_size > 0) { 2324 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2325 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2326 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2327 hci_stack->acl_fragmentation_total_size = 0; 2328 hci_stack->acl_fragmentation_pos = 0; 2329 if (release_buffer){ 2330 hci_release_packet_buffer(); 2331 } 2332 } 2333 } 2334 2335 // re-enable advertisements for le connections if active 2336 conn = hci_connection_for_handle(handle); 2337 if (!conn) break; 2338 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2339 #ifdef ENABLE_BLE 2340 #ifdef ENABLE_LE_PERIPHERAL 2341 if (hci_is_le_connection(conn)){ 2342 hci_reenable_advertisements_if_needed(); 2343 } 2344 #endif 2345 #endif 2346 break; 2347 2348 case HCI_EVENT_HARDWARE_ERROR: 2349 log_error("Hardware Error: 0x%02x", packet[2]); 2350 if (hci_stack->hardware_error_callback){ 2351 (*hci_stack->hardware_error_callback)(packet[2]); 2352 } else { 2353 // if no special requests, just reboot stack 2354 hci_power_control_off(); 2355 hci_power_control_on(); 2356 } 2357 break; 2358 2359 #ifdef ENABLE_CLASSIC 2360 case HCI_EVENT_ROLE_CHANGE: 2361 if (packet[2]) break; // status != 0 2362 reverse_bd_addr(&packet[3], addr); 2363 addr_type = BD_ADDR_TYPE_CLASSIC; 2364 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2365 if (!conn) break; 2366 conn->role = packet[9]; 2367 break; 2368 #endif 2369 2370 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2371 // release packet buffer only for asynchronous transport and if there are not further fragements 2372 if (hci_transport_synchronous()) { 2373 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2374 return; // instead of break: to avoid re-entering hci_run() 2375 } 2376 hci_stack->acl_fragmentation_tx_active = 0; 2377 if (hci_stack->acl_fragmentation_total_size) break; 2378 hci_release_packet_buffer(); 2379 2380 // L2CAP receives this event via the hci_emit_event below 2381 2382 #ifdef ENABLE_CLASSIC 2383 // For SCO, we do the can_send_now_check here 2384 hci_notify_if_sco_can_send_now(); 2385 #endif 2386 break; 2387 2388 #ifdef ENABLE_CLASSIC 2389 case HCI_EVENT_SCO_CAN_SEND_NOW: 2390 // For SCO, we do the can_send_now_check here 2391 hci_stack->sco_can_send_now = 1; 2392 hci_notify_if_sco_can_send_now(); 2393 return; 2394 2395 // explode inquriy results for easier consumption 2396 case HCI_EVENT_INQUIRY_RESULT: 2397 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2398 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2399 gap_inquiry_explode(packet); 2400 break; 2401 #endif 2402 2403 #ifdef ENABLE_BLE 2404 case HCI_EVENT_LE_META: 2405 switch (packet[2]){ 2406 #ifdef ENABLE_LE_CENTRAL 2407 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2408 // log_info("advertising report received"); 2409 if (!hci_stack->le_scanning_enabled) break; 2410 le_handle_advertisement_report(packet, size); 2411 break; 2412 #endif 2413 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2414 // Connection management 2415 reverse_bd_addr(&packet[8], addr); 2416 addr_type = (bd_addr_type_t)packet[7]; 2417 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2418 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2419 2420 #ifdef ENABLE_LE_CENTRAL 2421 // if auto-connect, remove from whitelist in both roles 2422 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2423 hci_remove_from_whitelist(addr_type, addr); 2424 } 2425 // handle error: error is reported only to the initiator -> outgoing connection 2426 if (packet[3]){ 2427 2428 // handle cancelled outgoing connection 2429 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2430 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2431 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2432 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2433 conn = gap_get_outgoing_connection(); 2434 } 2435 2436 // outgoing connection establishment is done 2437 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2438 // remove entry 2439 if (conn){ 2440 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2441 btstack_memory_hci_connection_free( conn ); 2442 } 2443 break; 2444 } 2445 #endif 2446 // on success, both hosts receive connection complete event 2447 if (packet[6] == HCI_ROLE_MASTER){ 2448 #ifdef ENABLE_LE_CENTRAL 2449 // if we're master, it was an outgoing connection and we're done with it 2450 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2451 #endif 2452 } else { 2453 #ifdef ENABLE_LE_PERIPHERAL 2454 // if we're slave, it was an incoming connection, advertisements have stopped 2455 hci_stack->le_advertisements_active = 0; 2456 #endif 2457 } 2458 // LE connections are auto-accepted, so just create a connection if there isn't one already 2459 if (!conn){ 2460 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2461 } 2462 // no memory, sorry. 2463 if (!conn){ 2464 break; 2465 } 2466 2467 conn->state = OPEN; 2468 conn->role = packet[6]; 2469 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2470 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2471 2472 #ifdef ENABLE_LE_PERIPHERAL 2473 if (packet[6] == HCI_ROLE_SLAVE){ 2474 hci_reenable_advertisements_if_needed(); 2475 } 2476 #endif 2477 2478 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2479 2480 // restart timer 2481 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2482 // btstack_run_loop_add_timer(&conn->timeout); 2483 2484 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2485 2486 hci_emit_nr_connections_changed(); 2487 break; 2488 2489 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2490 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2491 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2492 conn = hci_connection_for_handle(handle); 2493 if (!conn) break; 2494 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2495 break; 2496 2497 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2498 // connection 2499 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2500 conn = hci_connection_for_handle(handle); 2501 if (conn) { 2502 // read arguments 2503 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2504 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2505 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2506 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2507 2508 // validate against current connection parameter range 2509 le_connection_parameter_range_t existing_range; 2510 gap_get_connection_parameter_range(&existing_range); 2511 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2512 if (update_parameter){ 2513 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2514 conn->le_conn_interval_min = le_conn_interval_min; 2515 conn->le_conn_interval_max = le_conn_interval_max; 2516 conn->le_conn_latency = le_conn_latency; 2517 conn->le_supervision_timeout = le_supervision_timeout; 2518 } else { 2519 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2520 } 2521 } 2522 break; 2523 default: 2524 break; 2525 } 2526 break; 2527 #endif 2528 case HCI_EVENT_VENDOR_SPECIFIC: 2529 // Vendor specific commands often create vendor specific event instead of num completed packets 2530 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2531 switch (hci_stack->manufacturer){ 2532 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2533 hci_stack->num_cmd_packets = 1; 2534 break; 2535 default: 2536 break; 2537 } 2538 break; 2539 default: 2540 break; 2541 } 2542 2543 // handle BT initialization 2544 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2545 hci_initializing_event_handler(packet, size); 2546 } 2547 2548 // help with BT sleep 2549 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2550 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2551 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2552 hci_initializing_next_state(); 2553 } 2554 2555 // notify upper stack 2556 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2557 2558 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2559 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2560 if (!packet[2]){ 2561 handle = little_endian_read_16(packet, 3); 2562 hci_connection_t * aConn = hci_connection_for_handle(handle); 2563 if (aConn) { 2564 uint8_t status = aConn->bonding_status; 2565 uint16_t flags = aConn->bonding_flags; 2566 bd_addr_t bd_address; 2567 memcpy(&bd_address, aConn->address, 6); 2568 hci_shutdown_connection(aConn); 2569 // connection struct is gone, don't access anymore 2570 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2571 hci_emit_dedicated_bonding_result(bd_address, status); 2572 } 2573 } 2574 } 2575 } 2576 2577 // execute main loop 2578 hci_run(); 2579 } 2580 2581 #ifdef ENABLE_CLASSIC 2582 2583 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2584 static void sco_schedule_tx(hci_connection_t * conn); 2585 2586 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2587 log_debug("SCO TX Timeout"); 2588 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2589 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2590 if (!conn) return; 2591 2592 // trigger send 2593 conn->sco_tx_ready = 1; 2594 // extra packet if CVSD but SCO buffer is too short 2595 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && hci_stack->sco_data_packet_length < 123){ 2596 conn->sco_tx_ready++; 2597 } 2598 hci_notify_if_sco_can_send_now(); 2599 } 2600 2601 2602 #define SCO_TX_AFTER_RX_MS (6) 2603 2604 static void sco_schedule_tx(hci_connection_t * conn){ 2605 2606 uint32_t now = btstack_run_loop_get_time_ms(); 2607 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2608 int time_delta_ms = sco_tx_ms - now; 2609 2610 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2611 2612 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2613 btstack_run_loop_set_timer(timer, time_delta_ms); 2614 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2615 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2616 btstack_run_loop_add_timer(timer); 2617 } 2618 2619 static void sco_handler(uint8_t * packet, uint16_t size){ 2620 // lookup connection struct 2621 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2622 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2623 if (!conn) return; 2624 2625 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2626 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2627 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2628 packet[2] = 0x3c; 2629 memmove(&packet[3], &packet[23], 63); 2630 size = 63; 2631 } 2632 } 2633 2634 if (hci_have_usb_transport()){ 2635 // Nothing to do 2636 } else { 2637 // 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); 2638 if (hci_stack->synchronous_flow_control_enabled == 0){ 2639 uint32_t now = btstack_run_loop_get_time_ms(); 2640 2641 if (!conn->sco_rx_valid){ 2642 // ignore first 10 packets 2643 conn->sco_rx_count++; 2644 // log_debug("sco rx count %u", conn->sco_rx_count); 2645 if (conn->sco_rx_count == 10) { 2646 // use first timestamp as is and pretent it just started 2647 conn->sco_rx_ms = now; 2648 conn->sco_rx_valid = 1; 2649 conn->sco_rx_count = 0; 2650 sco_schedule_tx(conn); 2651 } 2652 } else { 2653 // track expected arrival timme 2654 conn->sco_rx_count++; 2655 conn->sco_rx_ms += 7; 2656 int delta = (int32_t) (now - conn->sco_rx_ms); 2657 if (delta > 0){ 2658 conn->sco_rx_ms++; 2659 } 2660 // log_debug("sco rx %u", conn->sco_rx_ms); 2661 sco_schedule_tx(conn); 2662 } 2663 } 2664 } 2665 // deliver to app 2666 if (hci_stack->sco_packet_handler) { 2667 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2668 } 2669 2670 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2671 conn->num_packets_completed++; 2672 hci_stack->host_completed_packets = 1; 2673 hci_run(); 2674 #endif 2675 } 2676 #endif 2677 2678 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2679 hci_dump_packet(packet_type, 1, packet, size); 2680 switch (packet_type) { 2681 case HCI_EVENT_PACKET: 2682 event_handler(packet, size); 2683 break; 2684 case HCI_ACL_DATA_PACKET: 2685 acl_handler(packet, size); 2686 break; 2687 #ifdef ENABLE_CLASSIC 2688 case HCI_SCO_DATA_PACKET: 2689 sco_handler(packet, size); 2690 break; 2691 #endif 2692 default: 2693 break; 2694 } 2695 } 2696 2697 /** 2698 * @brief Add event packet handler. 2699 */ 2700 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2701 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2702 } 2703 2704 2705 /** Register HCI packet handlers */ 2706 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2707 hci_stack->acl_packet_handler = handler; 2708 } 2709 2710 #ifdef ENABLE_CLASSIC 2711 /** 2712 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2713 */ 2714 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2715 hci_stack->sco_packet_handler = handler; 2716 } 2717 #endif 2718 2719 static void hci_state_reset(void){ 2720 // no connections yet 2721 hci_stack->connections = NULL; 2722 2723 // keep discoverable/connectable as this has been requested by the client(s) 2724 // hci_stack->discoverable = 0; 2725 // hci_stack->connectable = 0; 2726 // hci_stack->bondable = 1; 2727 // hci_stack->own_addr_type = 0; 2728 2729 // buffer is free 2730 hci_stack->hci_packet_buffer_reserved = 0; 2731 2732 // no pending cmds 2733 hci_stack->decline_reason = 0; 2734 hci_stack->new_scan_enable_value = 0xff; 2735 2736 // LE 2737 #ifdef ENABLE_BLE 2738 memset(hci_stack->le_random_address, 0, 6); 2739 hci_stack->le_random_address_set = 0; 2740 #endif 2741 #ifdef ENABLE_LE_CENTRAL 2742 hci_stack->le_scanning_active = 0; 2743 hci_stack->le_scan_type = 0xff; 2744 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2745 hci_stack->le_whitelist = 0; 2746 hci_stack->le_whitelist_capacity = 0; 2747 #endif 2748 } 2749 2750 #ifdef ENABLE_CLASSIC 2751 /** 2752 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2753 */ 2754 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2755 // store and open remote device db 2756 hci_stack->link_key_db = link_key_db; 2757 if (hci_stack->link_key_db) { 2758 hci_stack->link_key_db->open(); 2759 } 2760 } 2761 #endif 2762 2763 void hci_init(const hci_transport_t *transport, const void *config){ 2764 2765 #ifdef HAVE_MALLOC 2766 if (!hci_stack) { 2767 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2768 } 2769 #else 2770 hci_stack = &hci_stack_static; 2771 #endif 2772 memset(hci_stack, 0, sizeof(hci_stack_t)); 2773 2774 // reference to use transport layer implementation 2775 hci_stack->hci_transport = transport; 2776 2777 // reference to used config 2778 hci_stack->config = config; 2779 2780 // setup pointer for outgoing packet buffer 2781 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2782 2783 // max acl payload size defined in config.h 2784 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2785 2786 // register packet handlers with transport 2787 transport->register_packet_handler(&packet_handler); 2788 2789 hci_stack->state = HCI_STATE_OFF; 2790 2791 // class of device 2792 hci_stack->class_of_device = 0x007a020c; // Smartphone 2793 2794 // bondable by default 2795 hci_stack->bondable = 1; 2796 2797 #ifdef ENABLE_CLASSIC 2798 // classic name 2799 hci_stack->local_name = default_classic_name; 2800 2801 // Master slave policy 2802 hci_stack->master_slave_policy = 1; 2803 2804 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2805 hci_stack->gap_required_encyrption_key_size = 16; 2806 #endif 2807 2808 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2809 hci_stack->ssp_enable = 1; 2810 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2811 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2812 hci_stack->ssp_auto_accept = 1; 2813 2814 // voice setting - signed 16 bit pcm data with CVSD over the air 2815 hci_stack->sco_voice_setting = 0x60; 2816 2817 #ifdef ENABLE_LE_CENTRAL 2818 // connection parameter to use for outgoing connections 2819 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2820 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2821 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2822 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2823 hci_stack->le_connection_latency = 4; // 4 2824 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2825 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2826 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2827 2828 // default LE Scanning 2829 hci_stack->le_scan_interval = 0x1e0; 2830 hci_stack->le_scan_window = 0x30; 2831 #endif 2832 2833 #ifdef ENABLE_LE_PERIPHERAL 2834 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2835 #endif 2836 2837 // connection parameter range used to answer connection parameter update requests in l2cap 2838 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2839 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2840 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2841 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2842 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2843 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2844 2845 hci_state_reset(); 2846 } 2847 2848 /** 2849 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2850 */ 2851 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2852 hci_stack->chipset = chipset_driver; 2853 2854 // reset chipset driver - init is also called on power_up 2855 if (hci_stack->chipset && hci_stack->chipset->init){ 2856 hci_stack->chipset->init(hci_stack->config); 2857 } 2858 } 2859 2860 /** 2861 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2862 */ 2863 void hci_set_control(const btstack_control_t *hardware_control){ 2864 // references to used control implementation 2865 hci_stack->control = hardware_control; 2866 // init with transport config 2867 hardware_control->init(hci_stack->config); 2868 } 2869 2870 void hci_close(void){ 2871 // close remote device db 2872 if (hci_stack->link_key_db) { 2873 hci_stack->link_key_db->close(); 2874 } 2875 2876 btstack_linked_list_iterator_t lit; 2877 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2878 while (btstack_linked_list_iterator_has_next(&lit)){ 2879 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2880 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2881 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2882 hci_shutdown_connection(connection); 2883 } 2884 2885 hci_power_control(HCI_POWER_OFF); 2886 2887 #ifdef HAVE_MALLOC 2888 free(hci_stack); 2889 #endif 2890 hci_stack = NULL; 2891 } 2892 2893 #ifdef ENABLE_CLASSIC 2894 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2895 // validate ranage and set 2896 if (encryption_key_size < 7) return; 2897 if (encryption_key_size > 16) return; 2898 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2899 } 2900 #endif 2901 2902 #ifdef ENABLE_CLASSIC 2903 void gap_set_class_of_device(uint32_t class_of_device){ 2904 hci_stack->class_of_device = class_of_device; 2905 } 2906 2907 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2908 hci_stack->default_link_policy_settings = default_link_policy_settings; 2909 } 2910 2911 void hci_disable_l2cap_timeout_check(void){ 2912 disable_l2cap_timeouts = 1; 2913 } 2914 #endif 2915 2916 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2917 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2918 void hci_set_bd_addr(bd_addr_t addr){ 2919 memcpy(hci_stack->custom_bd_addr, addr, 6); 2920 hci_stack->custom_bd_addr_set = 1; 2921 } 2922 #endif 2923 2924 // State-Module-Driver overview 2925 // state module low-level 2926 // HCI_STATE_OFF off close 2927 // HCI_STATE_INITIALIZING, on open 2928 // HCI_STATE_WORKING, on open 2929 // HCI_STATE_HALTING, on open 2930 // HCI_STATE_SLEEPING, off/sleep close 2931 // HCI_STATE_FALLING_ASLEEP on open 2932 2933 static int hci_power_control_on(void){ 2934 2935 // power on 2936 int err = 0; 2937 if (hci_stack->control && hci_stack->control->on){ 2938 err = (*hci_stack->control->on)(); 2939 } 2940 if (err){ 2941 log_error( "POWER_ON failed"); 2942 hci_emit_hci_open_failed(); 2943 return err; 2944 } 2945 2946 // int chipset driver 2947 if (hci_stack->chipset && hci_stack->chipset->init){ 2948 hci_stack->chipset->init(hci_stack->config); 2949 } 2950 2951 // init transport 2952 if (hci_stack->hci_transport->init){ 2953 hci_stack->hci_transport->init(hci_stack->config); 2954 } 2955 2956 // open transport 2957 err = hci_stack->hci_transport->open(); 2958 if (err){ 2959 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2960 if (hci_stack->control && hci_stack->control->off){ 2961 (*hci_stack->control->off)(); 2962 } 2963 hci_emit_hci_open_failed(); 2964 return err; 2965 } 2966 return 0; 2967 } 2968 2969 static void hci_power_control_off(void){ 2970 2971 log_info("hci_power_control_off"); 2972 2973 // close low-level device 2974 hci_stack->hci_transport->close(); 2975 2976 log_info("hci_power_control_off - hci_transport closed"); 2977 2978 // power off 2979 if (hci_stack->control && hci_stack->control->off){ 2980 (*hci_stack->control->off)(); 2981 } 2982 2983 log_info("hci_power_control_off - control closed"); 2984 2985 hci_stack->state = HCI_STATE_OFF; 2986 } 2987 2988 static void hci_power_control_sleep(void){ 2989 2990 log_info("hci_power_control_sleep"); 2991 2992 #if 0 2993 // don't close serial port during sleep 2994 2995 // close low-level device 2996 hci_stack->hci_transport->close(hci_stack->config); 2997 #endif 2998 2999 // sleep mode 3000 if (hci_stack->control && hci_stack->control->sleep){ 3001 (*hci_stack->control->sleep)(); 3002 } 3003 3004 hci_stack->state = HCI_STATE_SLEEPING; 3005 } 3006 3007 static int hci_power_control_wake(void){ 3008 3009 log_info("hci_power_control_wake"); 3010 3011 // wake on 3012 if (hci_stack->control && hci_stack->control->wake){ 3013 (*hci_stack->control->wake)(); 3014 } 3015 3016 #if 0 3017 // open low-level device 3018 int err = hci_stack->hci_transport->open(hci_stack->config); 3019 if (err){ 3020 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3021 if (hci_stack->control && hci_stack->control->off){ 3022 (*hci_stack->control->off)(); 3023 } 3024 hci_emit_hci_open_failed(); 3025 return err; 3026 } 3027 #endif 3028 3029 return 0; 3030 } 3031 3032 static void hci_power_transition_to_initializing(void){ 3033 // set up state machine 3034 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3035 hci_stack->hci_packet_buffer_reserved = 0; 3036 hci_stack->state = HCI_STATE_INITIALIZING; 3037 hci_stack->substate = HCI_INIT_SEND_RESET; 3038 } 3039 3040 int hci_power_control(HCI_POWER_MODE power_mode){ 3041 3042 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3043 3044 int err = 0; 3045 switch (hci_stack->state){ 3046 3047 case HCI_STATE_OFF: 3048 switch (power_mode){ 3049 case HCI_POWER_ON: 3050 err = hci_power_control_on(); 3051 if (err) { 3052 log_error("hci_power_control_on() error %d", err); 3053 return err; 3054 } 3055 hci_power_transition_to_initializing(); 3056 break; 3057 case HCI_POWER_OFF: 3058 // do nothing 3059 break; 3060 case HCI_POWER_SLEEP: 3061 // do nothing (with SLEEP == OFF) 3062 break; 3063 } 3064 break; 3065 3066 case HCI_STATE_INITIALIZING: 3067 switch (power_mode){ 3068 case HCI_POWER_ON: 3069 // do nothing 3070 break; 3071 case HCI_POWER_OFF: 3072 // no connections yet, just turn it off 3073 hci_power_control_off(); 3074 break; 3075 case HCI_POWER_SLEEP: 3076 // no connections yet, just turn it off 3077 hci_power_control_sleep(); 3078 break; 3079 } 3080 break; 3081 3082 case HCI_STATE_WORKING: 3083 switch (power_mode){ 3084 case HCI_POWER_ON: 3085 // do nothing 3086 break; 3087 case HCI_POWER_OFF: 3088 // see hci_run 3089 hci_stack->state = HCI_STATE_HALTING; 3090 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3091 break; 3092 case HCI_POWER_SLEEP: 3093 // see hci_run 3094 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3095 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3096 break; 3097 } 3098 break; 3099 3100 case HCI_STATE_HALTING: 3101 switch (power_mode){ 3102 case HCI_POWER_ON: 3103 hci_power_transition_to_initializing(); 3104 break; 3105 case HCI_POWER_OFF: 3106 // do nothing 3107 break; 3108 case HCI_POWER_SLEEP: 3109 // see hci_run 3110 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3111 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3112 break; 3113 } 3114 break; 3115 3116 case HCI_STATE_FALLING_ASLEEP: 3117 switch (power_mode){ 3118 case HCI_POWER_ON: 3119 3120 #ifdef HAVE_PLATFORM_IPHONE_OS 3121 // nothing to do, if H4 supports power management 3122 if (btstack_control_iphone_power_management_enabled()){ 3123 hci_stack->state = HCI_STATE_INITIALIZING; 3124 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3125 break; 3126 } 3127 #endif 3128 hci_power_transition_to_initializing(); 3129 break; 3130 case HCI_POWER_OFF: 3131 // see hci_run 3132 hci_stack->state = HCI_STATE_HALTING; 3133 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3134 break; 3135 case HCI_POWER_SLEEP: 3136 // do nothing 3137 break; 3138 } 3139 break; 3140 3141 case HCI_STATE_SLEEPING: 3142 switch (power_mode){ 3143 case HCI_POWER_ON: 3144 3145 #ifdef HAVE_PLATFORM_IPHONE_OS 3146 // nothing to do, if H4 supports power management 3147 if (btstack_control_iphone_power_management_enabled()){ 3148 hci_stack->state = HCI_STATE_INITIALIZING; 3149 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3150 hci_update_scan_enable(); 3151 break; 3152 } 3153 #endif 3154 err = hci_power_control_wake(); 3155 if (err) return err; 3156 hci_power_transition_to_initializing(); 3157 break; 3158 case HCI_POWER_OFF: 3159 hci_stack->state = HCI_STATE_HALTING; 3160 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3161 break; 3162 case HCI_POWER_SLEEP: 3163 // do nothing 3164 break; 3165 } 3166 break; 3167 } 3168 3169 // create internal event 3170 hci_emit_state(); 3171 3172 // trigger next/first action 3173 hci_run(); 3174 3175 return 0; 3176 } 3177 3178 3179 #ifdef ENABLE_CLASSIC 3180 3181 static void hci_update_scan_enable(void){ 3182 // 2 = page scan, 1 = inq scan 3183 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3184 hci_run(); 3185 } 3186 3187 void gap_discoverable_control(uint8_t enable){ 3188 if (enable) enable = 1; // normalize argument 3189 3190 if (hci_stack->discoverable == enable){ 3191 hci_emit_discoverable_enabled(hci_stack->discoverable); 3192 return; 3193 } 3194 3195 hci_stack->discoverable = enable; 3196 hci_update_scan_enable(); 3197 } 3198 3199 void gap_connectable_control(uint8_t enable){ 3200 if (enable) enable = 1; // normalize argument 3201 3202 // don't emit event 3203 if (hci_stack->connectable == enable) return; 3204 3205 hci_stack->connectable = enable; 3206 hci_update_scan_enable(); 3207 } 3208 #endif 3209 3210 void gap_local_bd_addr(bd_addr_t address_buffer){ 3211 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3212 } 3213 3214 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3215 static void hci_host_num_completed_packets(void){ 3216 3217 // create packet manually as arrays are not supported and num_commands should not get reduced 3218 hci_reserve_packet_buffer(); 3219 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3220 3221 uint16_t size = 0; 3222 uint16_t num_handles = 0; 3223 packet[size++] = 0x35; 3224 packet[size++] = 0x0c; 3225 size++; // skip param len 3226 size++; // skip num handles 3227 3228 // add { handle, packets } entries 3229 btstack_linked_item_t * it; 3230 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3231 hci_connection_t * connection = (hci_connection_t *) it; 3232 if (connection->num_packets_completed){ 3233 little_endian_store_16(packet, size, connection->con_handle); 3234 size += 2; 3235 little_endian_store_16(packet, size, connection->num_packets_completed); 3236 size += 2; 3237 // 3238 num_handles++; 3239 connection->num_packets_completed = 0; 3240 } 3241 } 3242 3243 packet[2] = size - 3; 3244 packet[3] = num_handles; 3245 3246 hci_stack->host_completed_packets = 0; 3247 3248 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3249 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3250 3251 // release packet buffer for synchronous transport implementations 3252 if (hci_transport_synchronous()){ 3253 hci_release_packet_buffer(); 3254 hci_emit_transport_packet_sent(); 3255 } 3256 } 3257 #endif 3258 3259 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3260 UNUSED(ds); 3261 hci_stack->substate = HCI_HALTING_CLOSE; 3262 // allow packet handlers to defer final shutdown 3263 hci_emit_state(); 3264 hci_run(); 3265 } 3266 3267 static void hci_run(void){ 3268 3269 // log_info("hci_run: entered"); 3270 btstack_linked_item_t * it; 3271 3272 // send continuation fragments first, as they block the prepared packet buffer 3273 if (hci_stack->acl_fragmentation_total_size > 0) { 3274 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3275 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3276 if (connection) { 3277 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3278 hci_send_acl_packet_fragments(connection); 3279 return; 3280 } 3281 } else { 3282 // connection gone -> discard further fragments 3283 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3284 hci_stack->acl_fragmentation_total_size = 0; 3285 hci_stack->acl_fragmentation_pos = 0; 3286 } 3287 } 3288 3289 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3290 // send host num completed packets next as they don't require num_cmd_packets > 0 3291 if (!hci_can_send_comand_packet_transport()) return; 3292 if (hci_stack->host_completed_packets){ 3293 hci_host_num_completed_packets(); 3294 return; 3295 } 3296 #endif 3297 3298 if (!hci_can_send_command_packet_now()) return; 3299 3300 // global/non-connection oriented commands 3301 3302 #ifdef ENABLE_CLASSIC 3303 // decline incoming connections 3304 if (hci_stack->decline_reason){ 3305 uint8_t reason = hci_stack->decline_reason; 3306 hci_stack->decline_reason = 0; 3307 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3308 return; 3309 } 3310 // send scan enable 3311 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3312 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3313 hci_stack->new_scan_enable_value = 0xff; 3314 return; 3315 } 3316 // start/stop inquiry 3317 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3318 uint8_t duration = hci_stack->inquiry_state; 3319 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3320 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3321 return; 3322 } 3323 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3324 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3325 hci_send_cmd(&hci_inquiry_cancel); 3326 return; 3327 } 3328 // remote name request 3329 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3330 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3331 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3332 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3333 return; 3334 } 3335 // pairing 3336 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3337 uint8_t state = hci_stack->gap_pairing_state; 3338 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3339 switch (state){ 3340 case GAP_PAIRING_STATE_SEND_PIN: 3341 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); 3342 break; 3343 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3344 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3345 break; 3346 case GAP_PAIRING_STATE_SEND_PASSKEY: 3347 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3348 break; 3349 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3350 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3351 break; 3352 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3353 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3354 break; 3355 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3356 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3357 break; 3358 default: 3359 break; 3360 } 3361 return; 3362 } 3363 #endif 3364 3365 #ifdef ENABLE_BLE 3366 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3367 if ((hci_stack->state == HCI_STATE_WORKING) 3368 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3369 3370 #ifdef ENABLE_LE_CENTRAL 3371 // handle le scan 3372 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3373 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3374 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3375 return; 3376 } 3377 if (hci_stack->le_scan_type != 0xff){ 3378 // defaults: active scanning, accept all advertisement packets 3379 int scan_type = hci_stack->le_scan_type; 3380 hci_stack->le_scan_type = 0xff; 3381 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); 3382 return; 3383 } 3384 #endif 3385 #ifdef ENABLE_LE_PERIPHERAL 3386 // le advertisement control 3387 if (hci_stack->le_advertisements_todo){ 3388 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3389 } 3390 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3391 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3392 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3393 return; 3394 } 3395 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3396 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3397 hci_send_cmd(&hci_le_set_advertising_parameters, 3398 hci_stack->le_advertisements_interval_min, 3399 hci_stack->le_advertisements_interval_max, 3400 hci_stack->le_advertisements_type, 3401 hci_stack->le_own_addr_type, 3402 hci_stack->le_advertisements_direct_address_type, 3403 hci_stack->le_advertisements_direct_address, 3404 hci_stack->le_advertisements_channel_map, 3405 hci_stack->le_advertisements_filter_policy); 3406 return; 3407 } 3408 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3409 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3410 uint8_t adv_data_clean[31]; 3411 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3412 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3413 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3414 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3415 return; 3416 } 3417 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3418 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3419 uint8_t scan_data_clean[31]; 3420 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3421 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3422 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3423 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3424 return; 3425 } 3426 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3427 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3428 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3429 return; 3430 } 3431 #endif 3432 3433 #ifdef ENABLE_LE_CENTRAL 3434 // 3435 // LE Whitelist Management 3436 // 3437 3438 // check if whitelist needs modification 3439 btstack_linked_list_iterator_t lit; 3440 int modification_pending = 0; 3441 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3442 while (btstack_linked_list_iterator_has_next(&lit)){ 3443 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3444 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3445 modification_pending = 1; 3446 break; 3447 } 3448 } 3449 3450 if (modification_pending){ 3451 // stop connnecting if modification pending 3452 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3453 hci_send_cmd(&hci_le_create_connection_cancel); 3454 return; 3455 } 3456 3457 // add/remove entries 3458 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3459 while (btstack_linked_list_iterator_has_next(&lit)){ 3460 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3461 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3462 entry->state = LE_WHITELIST_ON_CONTROLLER; 3463 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3464 return; 3465 3466 } 3467 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3468 bd_addr_t address; 3469 bd_addr_type_t address_type = entry->address_type; 3470 memcpy(address, entry->address, 6); 3471 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3472 btstack_memory_whitelist_entry_free(entry); 3473 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3474 return; 3475 } 3476 } 3477 } 3478 3479 // start connecting 3480 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3481 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3482 bd_addr_t null_addr; 3483 memset(null_addr, 0, 6); 3484 hci_send_cmd(&hci_le_create_connection, 3485 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3486 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3487 1, // use whitelist 3488 0, // peer address type 3489 null_addr, // peer bd addr 3490 hci_stack->le_own_addr_type, // our addr type: 3491 hci_stack->le_connection_interval_min, // conn interval min 3492 hci_stack->le_connection_interval_max, // conn interval max 3493 hci_stack->le_connection_latency, // conn latency 3494 hci_stack->le_supervision_timeout, // conn latency 3495 hci_stack->le_minimum_ce_length, // min ce length 3496 hci_stack->le_maximum_ce_length // max ce length 3497 ); 3498 return; 3499 } 3500 #endif 3501 } 3502 #endif 3503 3504 // send pending HCI commands 3505 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3506 hci_connection_t * connection = (hci_connection_t *) it; 3507 3508 switch(connection->state){ 3509 case SEND_CREATE_CONNECTION: 3510 switch(connection->address_type){ 3511 #ifdef ENABLE_CLASSIC 3512 case BD_ADDR_TYPE_CLASSIC: 3513 log_info("sending hci_create_connection"); 3514 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3515 break; 3516 #endif 3517 default: 3518 #ifdef ENABLE_BLE 3519 #ifdef ENABLE_LE_CENTRAL 3520 // track outgoing connection 3521 hci_stack->outgoing_addr_type = connection->address_type; 3522 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3523 log_info("sending hci_le_create_connection"); 3524 hci_send_cmd(&hci_le_create_connection, 3525 hci_stack->le_connection_scan_interval, // conn scan interval 3526 hci_stack->le_connection_scan_window, // conn scan windows 3527 0, // don't use whitelist 3528 connection->address_type, // peer address type 3529 connection->address, // peer bd addr 3530 hci_stack->le_own_addr_type, // our addr type: 3531 hci_stack->le_connection_interval_min, // conn interval min 3532 hci_stack->le_connection_interval_max, // conn interval max 3533 hci_stack->le_connection_latency, // conn latency 3534 hci_stack->le_supervision_timeout, // conn latency 3535 hci_stack->le_minimum_ce_length, // min ce length 3536 hci_stack->le_maximum_ce_length // max ce length 3537 ); 3538 connection->state = SENT_CREATE_CONNECTION; 3539 #endif 3540 #endif 3541 break; 3542 } 3543 return; 3544 3545 #ifdef ENABLE_CLASSIC 3546 case RECEIVED_CONNECTION_REQUEST: 3547 connection->role = HCI_ROLE_SLAVE; 3548 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3549 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3550 connection->state = ACCEPTED_CONNECTION_REQUEST; 3551 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3552 } 3553 return; 3554 #endif 3555 3556 #ifdef ENABLE_BLE 3557 #ifdef ENABLE_LE_CENTRAL 3558 case SEND_CANCEL_CONNECTION: 3559 connection->state = SENT_CANCEL_CONNECTION; 3560 hci_send_cmd(&hci_le_create_connection_cancel); 3561 return; 3562 #endif 3563 #endif 3564 case SEND_DISCONNECT: 3565 connection->state = SENT_DISCONNECT; 3566 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3567 return; 3568 3569 default: 3570 break; 3571 } 3572 3573 // no further commands if connection is about to get shut down 3574 if (connection->state == SENT_DISCONNECT) continue; 3575 3576 #ifdef ENABLE_CLASSIC 3577 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3578 log_info("responding to link key request"); 3579 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3580 link_key_t link_key; 3581 link_key_type_t link_key_type; 3582 if ( hci_stack->link_key_db 3583 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3584 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3585 connection->link_key_type = link_key_type; 3586 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3587 } else { 3588 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3589 } 3590 return; 3591 } 3592 3593 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3594 log_info("denying to pin request"); 3595 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3596 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3597 return; 3598 } 3599 3600 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3601 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3602 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3603 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3604 // tweak authentication requirements 3605 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3606 if (connection->bonding_flags & BONDING_DEDICATED){ 3607 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3608 } 3609 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3610 authreq |= 1; 3611 } 3612 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3613 } else { 3614 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3615 } 3616 return; 3617 } 3618 3619 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3620 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3621 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3622 return; 3623 } 3624 3625 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3626 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3627 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3628 return; 3629 } 3630 3631 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3632 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3633 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3634 return; 3635 } 3636 3637 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3638 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3639 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3640 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3641 return; 3642 } 3643 3644 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3645 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3646 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3647 return; 3648 } 3649 3650 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3651 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3652 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3653 return; 3654 } 3655 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3656 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3657 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3658 return; 3659 } 3660 #endif 3661 3662 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3663 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3664 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3665 return; 3666 } 3667 3668 #ifdef ENABLE_CLASSIC 3669 uint16_t sniff_min_interval; 3670 switch (connection->sniff_min_interval){ 3671 case 0: 3672 break; 3673 case 0xffff: 3674 connection->sniff_min_interval = 0; 3675 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3676 return; 3677 default: 3678 sniff_min_interval = connection->sniff_min_interval; 3679 connection->sniff_min_interval = 0; 3680 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3681 return; 3682 } 3683 #endif 3684 3685 #ifdef ENABLE_BLE 3686 switch (connection->le_con_parameter_update_state){ 3687 // response to L2CAP CON PARAMETER UPDATE REQUEST 3688 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3689 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3690 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3691 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3692 0x0000, 0xffff); 3693 return; 3694 case CON_PARAMETER_UPDATE_REPLY: 3695 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3696 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3697 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3698 0x0000, 0xffff); 3699 return; 3700 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3701 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3702 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3703 return; 3704 default: 3705 break; 3706 } 3707 if (connection->le_phy_update_all_phys != 0xff){ 3708 uint8_t all_phys = connection->le_phy_update_all_phys; 3709 connection->le_phy_update_all_phys = 0xff; 3710 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); 3711 return; 3712 } 3713 #endif 3714 } 3715 3716 hci_connection_t * connection; 3717 switch (hci_stack->state){ 3718 case HCI_STATE_INITIALIZING: 3719 hci_initializing_run(); 3720 break; 3721 3722 case HCI_STATE_HALTING: 3723 3724 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3725 switch (hci_stack->substate){ 3726 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3727 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3728 3729 #ifdef ENABLE_BLE 3730 #ifdef ENABLE_LE_CENTRAL 3731 // free whitelist entries 3732 { 3733 btstack_linked_list_iterator_t lit; 3734 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3735 while (btstack_linked_list_iterator_has_next(&lit)){ 3736 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3737 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3738 btstack_memory_whitelist_entry_free(entry); 3739 } 3740 } 3741 #endif 3742 #endif 3743 // close all open connections 3744 connection = (hci_connection_t *) hci_stack->connections; 3745 if (connection){ 3746 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3747 if (!hci_can_send_command_packet_now()) return; 3748 3749 // check state 3750 if (connection->state == SENT_DISCONNECT) return; 3751 connection->state = SENT_DISCONNECT; 3752 3753 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3754 3755 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3756 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3757 3758 // ... which would be ignored anyway as we shutdown (free) the connection now 3759 hci_shutdown_connection(connection); 3760 3761 // finally, send the disconnect command 3762 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3763 return; 3764 } 3765 3766 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3767 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3768 log_info("HCI_STATE_HALTING: wait 50 ms"); 3769 hci_stack->substate = HCI_HALTING_W4_TIMER; 3770 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3771 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3772 btstack_run_loop_add_timer(&hci_stack->timeout); 3773 break; 3774 } 3775 3776 /* explicit fall-through */ 3777 3778 case HCI_HALTING_CLOSE: 3779 log_info("HCI_STATE_HALTING, calling off"); 3780 3781 // switch mode 3782 hci_power_control_off(); 3783 3784 log_info("HCI_STATE_HALTING, emitting state"); 3785 hci_emit_state(); 3786 log_info("HCI_STATE_HALTING, done"); 3787 break; 3788 3789 case HCI_HALTING_W4_TIMER: 3790 // keep waiting 3791 3792 break; 3793 default: 3794 break; 3795 } 3796 3797 break; 3798 3799 case HCI_STATE_FALLING_ASLEEP: 3800 switch(hci_stack->substate) { 3801 case HCI_FALLING_ASLEEP_DISCONNECT: 3802 log_info("HCI_STATE_FALLING_ASLEEP"); 3803 // close all open connections 3804 connection = (hci_connection_t *) hci_stack->connections; 3805 3806 #ifdef HAVE_PLATFORM_IPHONE_OS 3807 // don't close connections, if H4 supports power management 3808 if (btstack_control_iphone_power_management_enabled()){ 3809 connection = NULL; 3810 } 3811 #endif 3812 if (connection){ 3813 3814 // send disconnect 3815 if (!hci_can_send_command_packet_now()) return; 3816 3817 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3818 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3819 3820 // send disconnected event right away - causes higher layer connections to get closed, too. 3821 hci_shutdown_connection(connection); 3822 return; 3823 } 3824 3825 if (hci_classic_supported()){ 3826 // disable page and inquiry scan 3827 if (!hci_can_send_command_packet_now()) return; 3828 3829 log_info("HCI_STATE_HALTING, disabling inq scans"); 3830 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3831 3832 // continue in next sub state 3833 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3834 break; 3835 } 3836 // no break - fall through for ble-only chips 3837 3838 case HCI_FALLING_ASLEEP_COMPLETE: 3839 log_info("HCI_STATE_HALTING, calling sleep"); 3840 #ifdef HAVE_PLATFORM_IPHONE_OS 3841 // don't actually go to sleep, if H4 supports power management 3842 if (btstack_control_iphone_power_management_enabled()){ 3843 // SLEEP MODE reached 3844 hci_stack->state = HCI_STATE_SLEEPING; 3845 hci_emit_state(); 3846 break; 3847 } 3848 #endif 3849 // switch mode 3850 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3851 hci_emit_state(); 3852 break; 3853 3854 default: 3855 break; 3856 } 3857 break; 3858 3859 default: 3860 break; 3861 } 3862 } 3863 3864 int hci_send_cmd_packet(uint8_t *packet, int size){ 3865 // house-keeping 3866 3867 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3868 hci_stack->loopback_mode = packet[3]; 3869 } 3870 3871 #ifdef ENABLE_CLASSIC 3872 bd_addr_t addr; 3873 hci_connection_t * conn; 3874 3875 // create_connection? 3876 if (IS_COMMAND(packet, hci_create_connection)){ 3877 reverse_bd_addr(&packet[3], addr); 3878 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3879 3880 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3881 if (!conn){ 3882 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3883 if (!conn){ 3884 // notify client that alloc failed 3885 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3886 return -1; // packet not sent to controller 3887 } 3888 conn->state = SEND_CREATE_CONNECTION; 3889 } 3890 log_info("conn state %u", conn->state); 3891 switch (conn->state){ 3892 // if connection active exists 3893 case OPEN: 3894 // and OPEN, emit connection complete command 3895 hci_emit_connection_complete(addr, conn->con_handle, 0); 3896 return -1; // packet not sent to controller 3897 case SEND_CREATE_CONNECTION: 3898 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3899 break; 3900 default: 3901 // otherwise, just ignore as it is already in the open process 3902 return -1; // packet not sent to controller 3903 } 3904 conn->state = SENT_CREATE_CONNECTION; 3905 3906 // track outgoing connection 3907 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3908 memcpy(hci_stack->outgoing_addr, addr, 6); 3909 } 3910 3911 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3912 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3913 } 3914 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3915 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3916 } 3917 3918 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3919 if (hci_stack->link_key_db){ 3920 reverse_bd_addr(&packet[3], addr); 3921 hci_stack->link_key_db->delete_link_key(addr); 3922 } 3923 } 3924 3925 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3926 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3927 reverse_bd_addr(&packet[3], addr); 3928 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3929 if (conn){ 3930 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3931 } 3932 } 3933 3934 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3935 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3936 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3937 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3938 reverse_bd_addr(&packet[3], addr); 3939 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3940 if (conn){ 3941 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3942 } 3943 } 3944 3945 #ifdef ENABLE_SCO_OVER_HCI 3946 // setup_synchronous_connection? Voice setting at offset 22 3947 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3948 // TODO: compare to current setting if sco connection already active 3949 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3950 } 3951 // accept_synchronus_connection? Voice setting at offset 18 3952 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3953 // TODO: compare to current setting if sco connection already active 3954 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3955 } 3956 #endif 3957 #endif 3958 3959 #ifdef ENABLE_BLE 3960 #ifdef ENABLE_LE_PERIPHERAL 3961 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3962 hci_stack->le_random_address_set = 1; 3963 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3964 } 3965 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3966 hci_stack->le_advertisements_active = packet[3]; 3967 } 3968 #endif 3969 #ifdef ENABLE_LE_CENTRAL 3970 if (IS_COMMAND(packet, hci_le_create_connection)){ 3971 // white list used? 3972 uint8_t initiator_filter_policy = packet[7]; 3973 switch (initiator_filter_policy){ 3974 case 0: 3975 // whitelist not used 3976 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3977 break; 3978 case 1: 3979 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3980 break; 3981 default: 3982 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3983 break; 3984 } 3985 } 3986 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3987 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3988 } 3989 #endif 3990 #endif 3991 3992 hci_stack->num_cmd_packets--; 3993 3994 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3995 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3996 } 3997 3998 // disconnect because of security block 3999 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4000 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4001 if (!connection) return; 4002 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4003 } 4004 4005 4006 // Configure Secure Simple Pairing 4007 4008 #ifdef ENABLE_CLASSIC 4009 4010 // enable will enable SSP during init 4011 void gap_ssp_set_enable(int enable){ 4012 hci_stack->ssp_enable = enable; 4013 } 4014 4015 static int hci_local_ssp_activated(void){ 4016 return gap_ssp_supported() && hci_stack->ssp_enable; 4017 } 4018 4019 // if set, BTstack will respond to io capability request using authentication requirement 4020 void gap_ssp_set_io_capability(int io_capability){ 4021 hci_stack->ssp_io_capability = io_capability; 4022 } 4023 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4024 hci_stack->ssp_authentication_requirement = authentication_requirement; 4025 } 4026 4027 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4028 void gap_ssp_set_auto_accept(int auto_accept){ 4029 hci_stack->ssp_auto_accept = auto_accept; 4030 } 4031 #endif 4032 4033 // va_list part of hci_send_cmd 4034 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4035 if (!hci_can_send_command_packet_now()){ 4036 log_error("hci_send_cmd called but cannot send packet now"); 4037 return 0; 4038 } 4039 4040 // for HCI INITIALIZATION 4041 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4042 hci_stack->last_cmd_opcode = cmd->opcode; 4043 4044 hci_reserve_packet_buffer(); 4045 uint8_t * packet = hci_stack->hci_packet_buffer; 4046 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4047 int err = hci_send_cmd_packet(packet, size); 4048 4049 // release packet buffer for synchronous transport implementations 4050 if (hci_transport_synchronous()){ 4051 hci_release_packet_buffer(); 4052 hci_emit_transport_packet_sent(); 4053 } 4054 4055 return err; 4056 } 4057 4058 /** 4059 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4060 */ 4061 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4062 va_list argptr; 4063 va_start(argptr, cmd); 4064 int res = hci_send_cmd_va_arg(cmd, argptr); 4065 va_end(argptr); 4066 return res; 4067 } 4068 4069 // Create various non-HCI events. 4070 // TODO: generalize, use table similar to hci_create_command 4071 4072 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4073 // dump packet 4074 if (dump) { 4075 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4076 } 4077 4078 // dispatch to all event handlers 4079 btstack_linked_list_iterator_t it; 4080 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4081 while (btstack_linked_list_iterator_has_next(&it)){ 4082 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4083 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4084 } 4085 } 4086 4087 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4088 if (!hci_stack->acl_packet_handler) return; 4089 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4090 } 4091 4092 #ifdef ENABLE_CLASSIC 4093 static void hci_notify_if_sco_can_send_now(void){ 4094 // notify SCO sender if waiting 4095 if (!hci_stack->sco_waiting_for_can_send_now) return; 4096 if (hci_can_send_sco_packet_now()){ 4097 hci_stack->sco_waiting_for_can_send_now = 0; 4098 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4099 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4100 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4101 } 4102 } 4103 4104 // parsing end emitting has been merged to reduce code size 4105 static void gap_inquiry_explode(uint8_t * packet){ 4106 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4107 4108 uint8_t * eir_data; 4109 ad_context_t context; 4110 const uint8_t * name; 4111 uint8_t name_len; 4112 4113 int event_type = hci_event_packet_get_type(packet); 4114 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4115 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4116 4117 // event[1] is set at the end 4118 int i; 4119 for (i=0; i<num_responses;i++){ 4120 memset(event, 0, sizeof(event)); 4121 event[0] = GAP_EVENT_INQUIRY_RESULT; 4122 uint8_t event_size = 18; // if name is not set by EIR 4123 4124 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4125 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4126 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4127 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4128 4129 switch (event_type){ 4130 case HCI_EVENT_INQUIRY_RESULT: 4131 // 14,15,16,17 = 0, size 18 4132 break; 4133 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4134 event[14] = 1; 4135 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4136 // 16,17 = 0, size 18 4137 break; 4138 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4139 event[14] = 1; 4140 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4141 // for EIR packets, there is only one reponse in it 4142 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4143 name = NULL; 4144 // EIR data is 240 bytes in EIR event 4145 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4146 uint8_t data_type = ad_iterator_get_data_type(&context); 4147 uint8_t data_size = ad_iterator_get_data_len(&context); 4148 const uint8_t * data = ad_iterator_get_data(&context); 4149 // Prefer Complete Local Name over Shortend Local Name 4150 switch (data_type){ 4151 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4152 if (name) continue; 4153 /* explicit fall-through */ 4154 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4155 name = data; 4156 name_len = data_size; 4157 break; 4158 default: 4159 break; 4160 } 4161 } 4162 if (name){ 4163 event[16] = 1; 4164 // truncate name if needed 4165 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4166 event[17] = len; 4167 memcpy(&event[18], name, len); 4168 event_size += len; 4169 } 4170 break; 4171 } 4172 event[1] = event_size - 2; 4173 hci_emit_event(event, event_size, 1); 4174 } 4175 } 4176 #endif 4177 4178 void hci_emit_state(void){ 4179 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4180 uint8_t event[3]; 4181 event[0] = BTSTACK_EVENT_STATE; 4182 event[1] = sizeof(event) - 2; 4183 event[2] = hci_stack->state; 4184 hci_emit_event(event, sizeof(event), 1); 4185 } 4186 4187 #ifdef ENABLE_CLASSIC 4188 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4189 uint8_t event[13]; 4190 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4191 event[1] = sizeof(event) - 2; 4192 event[2] = status; 4193 little_endian_store_16(event, 3, con_handle); 4194 reverse_bd_addr(address, &event[5]); 4195 event[11] = 1; // ACL connection 4196 event[12] = 0; // encryption disabled 4197 hci_emit_event(event, sizeof(event), 1); 4198 } 4199 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4200 if (disable_l2cap_timeouts) return; 4201 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4202 uint8_t event[4]; 4203 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4204 event[1] = sizeof(event) - 2; 4205 little_endian_store_16(event, 2, conn->con_handle); 4206 hci_emit_event(event, sizeof(event), 1); 4207 } 4208 #endif 4209 4210 #ifdef ENABLE_BLE 4211 #ifdef ENABLE_LE_CENTRAL 4212 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4213 uint8_t event[21]; 4214 event[0] = HCI_EVENT_LE_META; 4215 event[1] = sizeof(event) - 2; 4216 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4217 event[3] = status; 4218 little_endian_store_16(event, 4, con_handle); 4219 event[6] = 0; // TODO: role 4220 event[7] = address_type; 4221 reverse_bd_addr(address, &event[8]); 4222 little_endian_store_16(event, 14, 0); // interval 4223 little_endian_store_16(event, 16, 0); // latency 4224 little_endian_store_16(event, 18, 0); // supervision timeout 4225 event[20] = 0; // master clock accuracy 4226 hci_emit_event(event, sizeof(event), 1); 4227 } 4228 #endif 4229 #endif 4230 4231 static void hci_emit_transport_packet_sent(void){ 4232 // notify upper stack that it might be possible to send again 4233 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4234 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4235 } 4236 4237 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4238 uint8_t event[6]; 4239 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4240 event[1] = sizeof(event) - 2; 4241 event[2] = 0; // status = OK 4242 little_endian_store_16(event, 3, con_handle); 4243 event[5] = reason; 4244 hci_emit_event(event, sizeof(event), 1); 4245 } 4246 4247 static void hci_emit_nr_connections_changed(void){ 4248 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4249 uint8_t event[3]; 4250 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4251 event[1] = sizeof(event) - 2; 4252 event[2] = nr_hci_connections(); 4253 hci_emit_event(event, sizeof(event), 1); 4254 } 4255 4256 static void hci_emit_hci_open_failed(void){ 4257 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4258 uint8_t event[2]; 4259 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4260 event[1] = sizeof(event) - 2; 4261 hci_emit_event(event, sizeof(event), 1); 4262 } 4263 4264 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4265 log_info("hci_emit_dedicated_bonding_result %u ", status); 4266 uint8_t event[9]; 4267 int pos = 0; 4268 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4269 event[pos++] = sizeof(event) - 2; 4270 event[pos++] = status; 4271 reverse_bd_addr(address, &event[pos]); 4272 hci_emit_event(event, sizeof(event), 1); 4273 } 4274 4275 4276 #ifdef ENABLE_CLASSIC 4277 4278 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4279 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4280 uint8_t event[5]; 4281 int pos = 0; 4282 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4283 event[pos++] = sizeof(event) - 2; 4284 little_endian_store_16(event, 2, con_handle); 4285 pos += 2; 4286 event[pos++] = level; 4287 hci_emit_event(event, sizeof(event), 1); 4288 } 4289 4290 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4291 if (!connection) return LEVEL_0; 4292 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4293 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4294 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4295 // LEVEL 4 always requires 128 bit encrytion key size 4296 if (security_level == LEVEL_4 && connection->encryption_key_size < 16){ 4297 security_level = LEVEL_3; 4298 } 4299 return security_level; 4300 } 4301 4302 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4303 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4304 uint8_t event[3]; 4305 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4306 event[1] = sizeof(event) - 2; 4307 event[2] = enabled; 4308 hci_emit_event(event, sizeof(event), 1); 4309 } 4310 4311 // query if remote side supports eSCO 4312 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4313 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4314 if (!connection) return 0; 4315 return connection->remote_supported_feature_eSCO; 4316 } 4317 4318 // query if remote side supports SSP 4319 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4320 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4321 if (!connection) return 0; 4322 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4323 } 4324 4325 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4326 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4327 } 4328 4329 // GAP API 4330 /** 4331 * @bbrief enable/disable bonding. default is enabled 4332 * @praram enabled 4333 */ 4334 void gap_set_bondable_mode(int enable){ 4335 hci_stack->bondable = enable ? 1 : 0; 4336 } 4337 /** 4338 * @brief Get bondable mode. 4339 * @return 1 if bondable 4340 */ 4341 int gap_get_bondable_mode(void){ 4342 return hci_stack->bondable; 4343 } 4344 4345 /** 4346 * @brief map link keys to security levels 4347 */ 4348 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4349 switch (link_key_type){ 4350 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4351 return LEVEL_4; 4352 case COMBINATION_KEY: 4353 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4354 return LEVEL_3; 4355 default: 4356 return LEVEL_2; 4357 } 4358 } 4359 4360 /** 4361 * @brief map link keys to secure connection yes/no 4362 */ 4363 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4364 switch (link_key_type){ 4365 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4366 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4367 return 1; 4368 default: 4369 return 0; 4370 } 4371 } 4372 4373 /** 4374 * @brief map link keys to authenticated 4375 */ 4376 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4377 switch (link_key_type){ 4378 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4379 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4380 return 1; 4381 default: 4382 return 0; 4383 } 4384 } 4385 4386 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4387 log_info("gap_mitm_protection_required_for_security_level %u", level); 4388 return level > LEVEL_2; 4389 } 4390 4391 /** 4392 * @brief get current security level 4393 */ 4394 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4395 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4396 if (!connection) return LEVEL_0; 4397 return gap_security_level_for_connection(connection); 4398 } 4399 4400 /** 4401 * @brief request connection to device to 4402 * @result GAP_AUTHENTICATION_RESULT 4403 */ 4404 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4405 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4406 if (!connection){ 4407 hci_emit_security_level(con_handle, LEVEL_0); 4408 return; 4409 } 4410 gap_security_level_t current_level = gap_security_level(con_handle); 4411 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4412 requested_level, connection->requested_security_level, current_level); 4413 4414 // assumption: earlier requested security higher than current level => security request is active 4415 if (current_level < connection->requested_security_level){ 4416 if (connection->requested_security_level < requested_level){ 4417 // increase requested level as new level is higher 4418 4419 // TODO: handle re-authentication when done 4420 4421 connection->requested_security_level = requested_level; 4422 } 4423 return; 4424 } 4425 4426 // no request active, notify if security sufficient 4427 if (requested_level <= current_level){ 4428 hci_emit_security_level(con_handle, current_level); 4429 return; 4430 } 4431 4432 // start pairing to increase security level 4433 connection->requested_security_level = requested_level; 4434 4435 #if 0 4436 // sending encryption request without a link key results in an error. 4437 // TODO: figure out how to use it properly 4438 4439 // would enabling ecnryption suffice (>= LEVEL_2)? 4440 if (hci_stack->link_key_db){ 4441 link_key_type_t link_key_type; 4442 link_key_t link_key; 4443 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4444 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4445 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4446 return; 4447 } 4448 } 4449 } 4450 #endif 4451 4452 // start to authenticate connection 4453 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4454 hci_run(); 4455 } 4456 4457 /** 4458 * @brief start dedicated bonding with device. disconnect after bonding 4459 * @param device 4460 * @param request MITM protection 4461 * @result GAP_DEDICATED_BONDING_COMPLETE 4462 */ 4463 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4464 4465 // create connection state machine 4466 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4467 4468 if (!connection){ 4469 return BTSTACK_MEMORY_ALLOC_FAILED; 4470 } 4471 4472 // delete linkn key 4473 gap_drop_link_key_for_bd_addr(device); 4474 4475 // configure LEVEL_2/3, dedicated bonding 4476 connection->state = SEND_CREATE_CONNECTION; 4477 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4478 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4479 connection->bonding_flags = BONDING_DEDICATED; 4480 4481 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4482 4483 // handle: connnection failure (connection complete != ok) 4484 // handle: authentication failure 4485 // handle: disconnect on done 4486 4487 hci_run(); 4488 4489 return 0; 4490 } 4491 #endif 4492 4493 void gap_set_local_name(const char * local_name){ 4494 hci_stack->local_name = local_name; 4495 } 4496 4497 4498 #ifdef ENABLE_BLE 4499 4500 #ifdef ENABLE_LE_CENTRAL 4501 void gap_start_scan(void){ 4502 hci_stack->le_scanning_enabled = 1; 4503 hci_run(); 4504 } 4505 4506 void gap_stop_scan(void){ 4507 hci_stack->le_scanning_enabled = 0; 4508 hci_run(); 4509 } 4510 4511 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4512 hci_stack->le_scan_type = scan_type; 4513 hci_stack->le_scan_interval = scan_interval; 4514 hci_stack->le_scan_window = scan_window; 4515 hci_run(); 4516 } 4517 4518 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4519 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4520 if (!conn){ 4521 log_info("gap_connect: no connection exists yet, creating context"); 4522 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4523 if (!conn){ 4524 // notify client that alloc failed 4525 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4526 log_info("gap_connect: failed to alloc hci_connection_t"); 4527 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4528 } 4529 conn->state = SEND_CREATE_CONNECTION; 4530 log_info("gap_connect: send create connection next"); 4531 hci_run(); 4532 return 0; 4533 } 4534 4535 if (!hci_is_le_connection(conn) || 4536 conn->state == SEND_CREATE_CONNECTION || 4537 conn->state == SENT_CREATE_CONNECTION) { 4538 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4539 log_error("gap_connect: classic connection or connect is already being created"); 4540 return GATT_CLIENT_IN_WRONG_STATE; 4541 } 4542 4543 log_info("gap_connect: context exists with state %u", conn->state); 4544 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4545 hci_run(); 4546 return 0; 4547 } 4548 4549 // @assumption: only a single outgoing LE Connection exists 4550 static hci_connection_t * gap_get_outgoing_connection(void){ 4551 btstack_linked_item_t *it; 4552 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4553 hci_connection_t * conn = (hci_connection_t *) it; 4554 if (!hci_is_le_connection(conn)) continue; 4555 switch (conn->state){ 4556 case SEND_CREATE_CONNECTION: 4557 case SENT_CREATE_CONNECTION: 4558 case SENT_CANCEL_CONNECTION: 4559 return conn; 4560 default: 4561 break; 4562 }; 4563 } 4564 return NULL; 4565 } 4566 4567 uint8_t gap_connect_cancel(void){ 4568 hci_connection_t * conn = gap_get_outgoing_connection(); 4569 if (!conn) return 0; 4570 switch (conn->state){ 4571 case SEND_CREATE_CONNECTION: 4572 // skip sending create connection and emit event instead 4573 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4574 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4575 btstack_memory_hci_connection_free( conn ); 4576 break; 4577 case SENT_CREATE_CONNECTION: 4578 // request to send cancel connection 4579 conn->state = SEND_CANCEL_CONNECTION; 4580 hci_run(); 4581 break; 4582 default: 4583 break; 4584 } 4585 return 0; 4586 } 4587 #endif 4588 4589 #ifdef ENABLE_LE_CENTRAL 4590 /** 4591 * @brief Set connection parameters for outgoing connections 4592 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4593 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4594 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4595 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4596 * @param conn_latency, default: 4 4597 * @param supervision_timeout (unit: 10ms), default: 720 ms 4598 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4599 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4600 */ 4601 4602 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4603 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4604 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4605 hci_stack->le_connection_scan_interval = conn_scan_interval; 4606 hci_stack->le_connection_scan_window = conn_scan_window; 4607 hci_stack->le_connection_interval_min = conn_interval_min; 4608 hci_stack->le_connection_interval_max = conn_interval_max; 4609 hci_stack->le_connection_latency = conn_latency; 4610 hci_stack->le_supervision_timeout = supervision_timeout; 4611 hci_stack->le_minimum_ce_length = min_ce_length; 4612 hci_stack->le_maximum_ce_length = max_ce_length; 4613 } 4614 #endif 4615 4616 /** 4617 * @brief Updates the connection parameters for a given LE connection 4618 * @param handle 4619 * @param conn_interval_min (unit: 1.25ms) 4620 * @param conn_interval_max (unit: 1.25ms) 4621 * @param conn_latency 4622 * @param supervision_timeout (unit: 10ms) 4623 * @returns 0 if ok 4624 */ 4625 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4626 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4627 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4628 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4629 connection->le_conn_interval_min = conn_interval_min; 4630 connection->le_conn_interval_max = conn_interval_max; 4631 connection->le_conn_latency = conn_latency; 4632 connection->le_supervision_timeout = supervision_timeout; 4633 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4634 hci_run(); 4635 return 0; 4636 } 4637 4638 /** 4639 * @brief Request an update of the connection parameter for a given LE connection 4640 * @param handle 4641 * @param conn_interval_min (unit: 1.25ms) 4642 * @param conn_interval_max (unit: 1.25ms) 4643 * @param conn_latency 4644 * @param supervision_timeout (unit: 10ms) 4645 * @returns 0 if ok 4646 */ 4647 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4648 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4649 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4650 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4651 connection->le_conn_interval_min = conn_interval_min; 4652 connection->le_conn_interval_max = conn_interval_max; 4653 connection->le_conn_latency = conn_latency; 4654 connection->le_supervision_timeout = supervision_timeout; 4655 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4656 hci_run(); 4657 return 0; 4658 } 4659 4660 #ifdef ENABLE_LE_PERIPHERAL 4661 4662 static void gap_advertisments_changed(void){ 4663 // disable advertisements before updating adv, scan data, or adv params 4664 if (hci_stack->le_advertisements_active){ 4665 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4666 } 4667 hci_run(); 4668 } 4669 4670 /** 4671 * @brief Set Advertisement Data 4672 * @param advertising_data_length 4673 * @param advertising_data (max 31 octets) 4674 * @note data is not copied, pointer has to stay valid 4675 */ 4676 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4677 hci_stack->le_advertisements_data_len = advertising_data_length; 4678 hci_stack->le_advertisements_data = advertising_data; 4679 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4680 gap_advertisments_changed(); 4681 } 4682 4683 /** 4684 * @brief Set Scan Response Data 4685 * @param advertising_data_length 4686 * @param advertising_data (max 31 octets) 4687 * @note data is not copied, pointer has to stay valid 4688 */ 4689 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4690 hci_stack->le_scan_response_data_len = scan_response_data_length; 4691 hci_stack->le_scan_response_data = scan_response_data; 4692 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4693 gap_advertisments_changed(); 4694 } 4695 4696 /** 4697 * @brief Set Advertisement Parameters 4698 * @param adv_int_min 4699 * @param adv_int_max 4700 * @param adv_type 4701 * @param direct_address_type 4702 * @param direct_address 4703 * @param channel_map 4704 * @param filter_policy 4705 * 4706 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4707 */ 4708 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4709 uint8_t direct_address_typ, bd_addr_t direct_address, 4710 uint8_t channel_map, uint8_t filter_policy) { 4711 4712 hci_stack->le_advertisements_interval_min = adv_int_min; 4713 hci_stack->le_advertisements_interval_max = adv_int_max; 4714 hci_stack->le_advertisements_type = adv_type; 4715 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4716 hci_stack->le_advertisements_channel_map = channel_map; 4717 hci_stack->le_advertisements_filter_policy = filter_policy; 4718 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4719 4720 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4721 gap_advertisments_changed(); 4722 } 4723 4724 /** 4725 * @brief Enable/Disable Advertisements 4726 * @param enabled 4727 */ 4728 void gap_advertisements_enable(int enabled){ 4729 hci_stack->le_advertisements_enabled = enabled; 4730 if (enabled && !hci_stack->le_advertisements_active){ 4731 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4732 } 4733 if (!enabled && hci_stack->le_advertisements_active){ 4734 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4735 } 4736 hci_run(); 4737 } 4738 4739 #endif 4740 4741 void hci_le_set_own_address_type(uint8_t own_address_type){ 4742 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4743 if (own_address_type == hci_stack->le_own_addr_type) return; 4744 hci_stack->le_own_addr_type = own_address_type; 4745 4746 #ifdef ENABLE_LE_PERIPHERAL 4747 // update advertisement parameters, too 4748 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4749 gap_advertisments_changed(); 4750 #endif 4751 #ifdef ENABLE_LE_CENTRAL 4752 // note: we don't update scan parameters or modify ongoing connection attempts 4753 #endif 4754 } 4755 4756 #endif 4757 4758 uint8_t gap_disconnect(hci_con_handle_t handle){ 4759 hci_connection_t * conn = hci_connection_for_handle(handle); 4760 if (!conn){ 4761 hci_emit_disconnection_complete(handle, 0); 4762 return 0; 4763 } 4764 // ignore if already disconnected 4765 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4766 return 0; 4767 } 4768 conn->state = SEND_DISCONNECT; 4769 hci_run(); 4770 return 0; 4771 } 4772 4773 /** 4774 * @brief Get connection type 4775 * @param con_handle 4776 * @result connection_type 4777 */ 4778 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4779 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4780 if (!conn) return GAP_CONNECTION_INVALID; 4781 switch (conn->address_type){ 4782 case BD_ADDR_TYPE_LE_PUBLIC: 4783 case BD_ADDR_TYPE_LE_RANDOM: 4784 return GAP_CONNECTION_LE; 4785 case BD_ADDR_TYPE_SCO: 4786 return GAP_CONNECTION_SCO; 4787 case BD_ADDR_TYPE_CLASSIC: 4788 return GAP_CONNECTION_ACL; 4789 default: 4790 return GAP_CONNECTION_INVALID; 4791 } 4792 } 4793 4794 #ifdef ENABLE_BLE 4795 4796 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){ 4797 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4798 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4799 4800 conn->le_phy_update_all_phys = all_phys; 4801 conn->le_phy_update_tx_phys = tx_phys; 4802 conn->le_phy_update_rx_phys = rx_phys; 4803 conn->le_phy_update_phy_options = phy_options; 4804 4805 hci_run(); 4806 4807 return 0; 4808 } 4809 4810 #ifdef ENABLE_LE_CENTRAL 4811 /** 4812 * @brief Auto Connection Establishment - Start Connecting to device 4813 * @param address_typ 4814 * @param address 4815 * @returns 0 if ok 4816 */ 4817 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4818 // check capacity 4819 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4820 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4821 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4822 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4823 entry->address_type = address_type; 4824 memcpy(entry->address, address, 6); 4825 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4826 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4827 hci_run(); 4828 return 0; 4829 } 4830 4831 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4832 btstack_linked_list_iterator_t it; 4833 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4834 while (btstack_linked_list_iterator_has_next(&it)){ 4835 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4836 if (entry->address_type != address_type) continue; 4837 if (memcmp(entry->address, address, 6) != 0) continue; 4838 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4839 // remove from controller if already present 4840 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4841 continue; 4842 } 4843 // direclty remove entry from whitelist 4844 btstack_linked_list_iterator_remove(&it); 4845 btstack_memory_whitelist_entry_free(entry); 4846 } 4847 } 4848 4849 /** 4850 * @brief Auto Connection Establishment - Stop Connecting to device 4851 * @param address_typ 4852 * @param address 4853 * @returns 0 if ok 4854 */ 4855 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4856 hci_remove_from_whitelist(address_type, address); 4857 hci_run(); 4858 return 0; 4859 } 4860 4861 /** 4862 * @brief Auto Connection Establishment - Stop everything 4863 * @note Convenience function to stop all active auto connection attempts 4864 */ 4865 void gap_auto_connection_stop_all(void){ 4866 btstack_linked_list_iterator_t it; 4867 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4868 while (btstack_linked_list_iterator_has_next(&it)){ 4869 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4870 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4871 // remove from controller if already present 4872 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4873 continue; 4874 } 4875 // directly remove entry from whitelist 4876 btstack_linked_list_iterator_remove(&it); 4877 btstack_memory_whitelist_entry_free(entry); 4878 } 4879 hci_run(); 4880 } 4881 4882 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4883 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4884 if (!conn) return 0; 4885 return conn->le_connection_interval; 4886 } 4887 #endif 4888 #endif 4889 4890 #ifdef ENABLE_CLASSIC 4891 /** 4892 * @brief Set Extended Inquiry Response data 4893 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4894 * @note has to be done before stack starts up 4895 */ 4896 void gap_set_extended_inquiry_response(const uint8_t * data){ 4897 hci_stack->eir_data = data; 4898 } 4899 4900 /** 4901 * @brief Start GAP Classic Inquiry 4902 * @param duration in 1.28s units 4903 * @return 0 if ok 4904 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4905 */ 4906 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4907 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4908 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4909 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4910 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4911 } 4912 hci_stack->inquiry_state = duration_in_1280ms_units; 4913 hci_run(); 4914 return 0; 4915 } 4916 4917 /** 4918 * @brief Stop GAP Classic Inquiry 4919 * @returns 0 if ok 4920 */ 4921 int gap_inquiry_stop(void){ 4922 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4923 // emit inquiry complete event, before it even started 4924 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4925 hci_emit_event(event, sizeof(event), 1); 4926 return 0; 4927 } 4928 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4929 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4930 hci_run(); 4931 return 0; 4932 } 4933 4934 4935 /** 4936 * @brief Remote Name Request 4937 * @param addr 4938 * @param page_scan_repetition_mode 4939 * @param clock_offset only used when bit 15 is set 4940 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4941 */ 4942 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4943 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4944 memcpy(hci_stack->remote_name_addr, addr, 6); 4945 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4946 hci_stack->remote_name_clock_offset = clock_offset; 4947 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4948 hci_run(); 4949 return 0; 4950 } 4951 4952 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4953 hci_stack->gap_pairing_state = state; 4954 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4955 hci_run(); 4956 return 0; 4957 } 4958 4959 /** 4960 * @brief Legacy Pairing Pin Code Response 4961 * @param addr 4962 * @param pin 4963 * @return 0 if ok 4964 */ 4965 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4966 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4967 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4968 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4969 } 4970 4971 /** 4972 * @brief Abort Legacy Pairing 4973 * @param addr 4974 * @param pin 4975 * @return 0 if ok 4976 */ 4977 int gap_pin_code_negative(bd_addr_t addr){ 4978 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4979 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4980 } 4981 4982 /** 4983 * @brief SSP Passkey Response 4984 * @param addr 4985 * @param passkey 4986 * @return 0 if ok 4987 */ 4988 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4989 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4990 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4991 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4992 } 4993 4994 /** 4995 * @brief Abort SSP Passkey Entry/Pairing 4996 * @param addr 4997 * @param pin 4998 * @return 0 if ok 4999 */ 5000 int gap_ssp_passkey_negative(bd_addr_t addr){ 5001 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5002 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5003 } 5004 5005 /** 5006 * @brief Accept SSP Numeric Comparison 5007 * @param addr 5008 * @param passkey 5009 * @return 0 if ok 5010 */ 5011 int gap_ssp_confirmation_response(bd_addr_t addr){ 5012 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5013 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5014 } 5015 5016 /** 5017 * @brief Abort SSP Numeric Comparison/Pairing 5018 * @param addr 5019 * @param pin 5020 * @return 0 if ok 5021 */ 5022 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5023 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5024 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5025 } 5026 5027 /** 5028 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5029 * @param inquiry_mode see bluetooth_defines.h 5030 */ 5031 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5032 hci_stack->inquiry_mode = mode; 5033 } 5034 5035 /** 5036 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5037 */ 5038 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5039 hci_stack->sco_voice_setting = voice_setting; 5040 } 5041 5042 /** 5043 * @brief Get SCO Voice Setting 5044 * @return current voice setting 5045 */ 5046 uint16_t hci_get_sco_voice_setting(void){ 5047 return hci_stack->sco_voice_setting; 5048 } 5049 5050 #ifdef ENABLE_CLASSIC 5051 static int hci_have_usb_transport(void){ 5052 if (!hci_stack->hci_transport) return 0; 5053 const char * transport_name = hci_stack->hci_transport->name; 5054 if (!transport_name) return 0; 5055 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5056 } 5057 #endif 5058 5059 /** @brief Get SCO packet length for current SCO Voice setting 5060 * @note Using SCO packets of the exact length is required for USB transfer 5061 * @return Length of SCO packets in bytes (not audio frames) 5062 */ 5063 int hci_get_sco_packet_length(void){ 5064 int sco_packet_length = 0; 5065 5066 #ifdef ENABLE_CLASSIC 5067 #ifdef ENABLE_SCO_OVER_HCI 5068 5069 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5070 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5071 5072 if (hci_have_usb_transport()){ 5073 // see Core Spec for H2 USB Transfer. 5074 // 3 byte SCO header + 24 bytes per connection 5075 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5076 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5077 } else { 5078 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5079 sco_packet_length = 3 + 60 * multiplier; 5080 // assert that it still fits inside an SCO buffer 5081 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5082 sco_packet_length = 3 + 60; 5083 } 5084 } 5085 #endif 5086 #endif 5087 return sco_packet_length; 5088 } 5089 5090 /** 5091 * @brief Sets the master/slave policy 5092 * @param policy (0: attempt to become master, 1: let connecting device decide) 5093 */ 5094 void hci_set_master_slave_policy(uint8_t policy){ 5095 hci_stack->master_slave_policy = policy; 5096 } 5097 5098 #endif 5099 5100 HCI_STATE hci_get_state(void){ 5101 return hci_stack->state; 5102 } 5103 5104 5105 /** 5106 * @brief Set callback for Bluetooth Hardware Error 5107 */ 5108 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5109 hci_stack->hardware_error_callback = fn; 5110 } 5111 5112 void hci_disconnect_all(void){ 5113 btstack_linked_list_iterator_t it; 5114 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5115 while (btstack_linked_list_iterator_has_next(&it)){ 5116 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5117 if (con->state == SENT_DISCONNECT) continue; 5118 con->state = SEND_DISCONNECT; 5119 } 5120 hci_run(); 5121 } 5122 5123 uint16_t hci_get_manufacturer(void){ 5124 return hci_stack->manufacturer; 5125 } 5126 5127 #ifdef ENABLE_BLE 5128 5129 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5130 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5131 if (!hci_con) return NULL; 5132 return &hci_con->sm_connection; 5133 } 5134 5135 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5136 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5137 5138 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5139 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5140 if (hci_connection == NULL) return 0; 5141 if (hci_is_le_connection(hci_connection)){ 5142 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5143 if (sm_conn->sm_connection_encrypted) { 5144 return sm_conn->sm_actual_encryption_key_size; 5145 } 5146 } 5147 #ifdef ENABLE_CLASSIC 5148 else { 5149 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5150 return hci_connection->encryption_key_size; 5151 } 5152 } 5153 #endif 5154 return 0; 5155 } 5156 5157 int gap_authenticated(hci_con_handle_t con_handle){ 5158 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5159 if (hci_connection == NULL) return 0; 5160 5161 switch (hci_connection->address_type){ 5162 case BD_ADDR_TYPE_LE_PUBLIC: 5163 case BD_ADDR_TYPE_LE_RANDOM: 5164 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5165 return hci_connection->sm_connection.sm_connection_authenticated; 5166 #ifdef ENABLE_CLASSIC 5167 case BD_ADDR_TYPE_SCO: 5168 case BD_ADDR_TYPE_CLASSIC: 5169 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5170 #endif 5171 default: 5172 return 0; 5173 } 5174 } 5175 5176 int gap_secure_connection(hci_con_handle_t con_handle){ 5177 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5178 if (hci_connection == NULL) return 0; 5179 5180 switch (hci_connection->address_type){ 5181 case BD_ADDR_TYPE_LE_PUBLIC: 5182 case BD_ADDR_TYPE_LE_RANDOM: 5183 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5184 return hci_connection->sm_connection.sm_connection_sc; 5185 #ifdef ENABLE_CLASSIC 5186 case BD_ADDR_TYPE_SCO: 5187 case BD_ADDR_TYPE_CLASSIC: 5188 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5189 #endif 5190 default: 5191 return 0; 5192 } 5193 } 5194 5195 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5196 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5197 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5198 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5199 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5200 return sm_conn->sm_connection_authorization_state; 5201 } 5202 #endif 5203 5204 #ifdef ENABLE_CLASSIC 5205 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){ 5206 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5207 if (!conn) return GAP_CONNECTION_INVALID; 5208 conn->sniff_min_interval = sniff_min_interval; 5209 conn->sniff_max_interval = sniff_max_interval; 5210 conn->sniff_attempt = sniff_attempt; 5211 conn->sniff_timeout = sniff_timeout; 5212 hci_run(); 5213 return 0; 5214 } 5215 5216 /** 5217 * @brief Exit Sniff mode 5218 * @param con_handle 5219 @ @return 0 if ok 5220 */ 5221 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5222 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5223 if (!conn) return GAP_CONNECTION_INVALID; 5224 conn->sniff_min_interval = 0xffff; 5225 hci_run(); 5226 return 0; 5227 } 5228 #endif 5229 5230 void hci_halting_defer(void){ 5231 if (hci_stack->state != HCI_STATE_HALTING) return; 5232 switch (hci_stack->substate){ 5233 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5234 case HCI_HALTING_CLOSE: 5235 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5236 break; 5237 default: 5238 break; 5239 } 5240 } 5241