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 } 2021 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2022 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2023 } 2024 #endif 2025 break; 2026 2027 case HCI_EVENT_COMMAND_STATUS: 2028 // get num cmd packets - limit to 1 to reduce complexity 2029 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2030 2031 // check command status to detected failed outgoing connections 2032 create_connection_cmd = 0; 2033 #ifdef ENABLE_CLASSIC 2034 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2035 create_connection_cmd = 1; 2036 } 2037 #endif 2038 #ifdef ENABLE_LE_CENTRAL 2039 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2040 create_connection_cmd = 1; 2041 } 2042 #endif 2043 if (create_connection_cmd) { 2044 uint8_t status = hci_event_command_status_get_status(packet); 2045 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2046 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); 2047 2048 // reset outgoing address info 2049 memset(hci_stack->outgoing_addr, 0, 6); 2050 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2051 2052 // error => outgoing connection failed 2053 if ((conn != NULL) && (status != 0)){ 2054 hci_handle_connection_failed(conn, status); 2055 } 2056 } 2057 break; 2058 2059 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2060 int offset = 3; 2061 for (i=0; i<packet[2];i++){ 2062 handle = little_endian_read_16(packet, offset) & 0x0fff; 2063 offset += 2; 2064 uint16_t num_packets = little_endian_read_16(packet, offset); 2065 offset += 2; 2066 2067 conn = hci_connection_for_handle(handle); 2068 if (!conn){ 2069 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2070 continue; 2071 } 2072 2073 if (conn->num_packets_sent >= num_packets){ 2074 conn->num_packets_sent -= num_packets; 2075 } else { 2076 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2077 conn->num_packets_sent = 0; 2078 } 2079 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2080 2081 #ifdef ENABLE_CLASSIC 2082 // For SCO, we do the can_send_now_check here 2083 hci_notify_if_sco_can_send_now(); 2084 #endif 2085 } 2086 break; 2087 } 2088 2089 #ifdef ENABLE_CLASSIC 2090 case HCI_EVENT_INQUIRY_COMPLETE: 2091 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2092 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2093 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2094 hci_emit_event(event, sizeof(event), 1); 2095 } 2096 break; 2097 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2098 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2099 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2100 } 2101 break; 2102 case HCI_EVENT_CONNECTION_REQUEST: 2103 reverse_bd_addr(&packet[2], addr); 2104 // TODO: eval COD 8-10 2105 link_type = packet[11]; 2106 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2107 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2108 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2109 if (!conn) { 2110 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2111 } 2112 if (!conn) { 2113 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2114 hci_stack->decline_reason = 0x0d; 2115 bd_addr_copy(hci_stack->decline_addr, addr); 2116 break; 2117 } 2118 conn->role = HCI_ROLE_SLAVE; 2119 conn->state = RECEIVED_CONNECTION_REQUEST; 2120 // store info about eSCO 2121 if (link_type == 0x02){ 2122 conn->remote_supported_feature_eSCO = 1; 2123 } 2124 hci_run(); 2125 break; 2126 2127 case HCI_EVENT_CONNECTION_COMPLETE: 2128 // Connection management 2129 reverse_bd_addr(&packet[5], addr); 2130 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2131 addr_type = BD_ADDR_TYPE_CLASSIC; 2132 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2133 if (conn) { 2134 if (!packet[2]){ 2135 conn->state = OPEN; 2136 conn->con_handle = little_endian_read_16(packet, 3); 2137 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2138 2139 // restart timer 2140 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2141 btstack_run_loop_add_timer(&conn->timeout); 2142 2143 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2144 2145 hci_emit_nr_connections_changed(); 2146 } else { 2147 // connection failed 2148 hci_handle_connection_failed(conn, packet[2]); 2149 } 2150 } 2151 break; 2152 2153 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2154 reverse_bd_addr(&packet[5], addr); 2155 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2156 if (packet[2]){ 2157 // connection failed 2158 break; 2159 } 2160 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2161 if (!conn) { 2162 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2163 } 2164 if (!conn) { 2165 break; 2166 } 2167 conn->state = OPEN; 2168 conn->con_handle = little_endian_read_16(packet, 3); 2169 2170 #ifdef ENABLE_SCO_OVER_HCI 2171 // update SCO 2172 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2173 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2174 } 2175 // trigger can send now 2176 if (hci_have_usb_transport()){ 2177 hci_stack->sco_can_send_now = 1; 2178 } 2179 #endif 2180 break; 2181 2182 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2183 handle = little_endian_read_16(packet, 3); 2184 conn = hci_connection_for_handle(handle); 2185 if (!conn) break; 2186 if (!packet[2]){ 2187 uint8_t * features = &packet[5]; 2188 if (features[6] & (1 << 3)){ 2189 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2190 } 2191 if (features[3] & (1<<7)){ 2192 conn->remote_supported_feature_eSCO = 1; 2193 } 2194 } 2195 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2196 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2197 if (conn->bonding_flags & BONDING_DEDICATED){ 2198 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2199 } 2200 break; 2201 2202 case HCI_EVENT_LINK_KEY_REQUEST: 2203 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2204 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2205 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2206 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2207 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2208 hci_run(); 2209 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2210 return; 2211 2212 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2213 reverse_bd_addr(&packet[2], addr); 2214 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2215 if (!conn) break; 2216 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2217 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2218 // Change Connection Encryption keeps link key type 2219 if (link_key_type != CHANGED_COMBINATION_KEY){ 2220 conn->link_key_type = link_key_type; 2221 } 2222 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2223 // still forward event to allow dismiss of pairing dialog 2224 break; 2225 } 2226 2227 case HCI_EVENT_PIN_CODE_REQUEST: 2228 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2229 // non-bondable mode: pin code negative reply will be sent 2230 if (!hci_stack->bondable){ 2231 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2232 hci_run(); 2233 return; 2234 } 2235 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2236 if (!hci_stack->link_key_db) break; 2237 hci_event_pin_code_request_get_bd_addr(packet, addr); 2238 hci_stack->link_key_db->delete_link_key(addr); 2239 break; 2240 2241 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2242 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2243 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2244 break; 2245 2246 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2247 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2248 if (!hci_stack->ssp_auto_accept) break; 2249 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2250 break; 2251 2252 case HCI_EVENT_USER_PASSKEY_REQUEST: 2253 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2254 if (!hci_stack->ssp_auto_accept) break; 2255 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2256 break; 2257 case HCI_EVENT_MODE_CHANGE: 2258 handle = hci_event_mode_change_get_handle(packet); 2259 conn = hci_connection_for_handle(handle); 2260 if (!conn) break; 2261 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2262 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2263 break; 2264 #endif 2265 2266 case HCI_EVENT_ENCRYPTION_CHANGE: 2267 handle = little_endian_read_16(packet, 3); 2268 conn = hci_connection_for_handle(handle); 2269 if (!conn) break; 2270 if (packet[2] == 0) { 2271 if (packet[5]){ 2272 if (hci_is_le_connection(conn)){ 2273 // For LE, we accept connection as encrypted 2274 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2275 } 2276 #ifdef ENABLE_CLASSIC 2277 else { 2278 // For Classic, we need to validate encryption key size first 2279 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2280 } 2281 #endif 2282 } else { 2283 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2284 } 2285 } 2286 2287 break; 2288 2289 #ifdef ENABLE_CLASSIC 2290 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2291 handle = little_endian_read_16(packet, 3); 2292 conn = hci_connection_for_handle(handle); 2293 if (!conn) break; 2294 2295 // dedicated bonding: send result and disconnect 2296 if (conn->bonding_flags & BONDING_DEDICATED){ 2297 conn->bonding_flags &= ~BONDING_DEDICATED; 2298 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2299 conn->bonding_status = packet[2]; 2300 break; 2301 } 2302 2303 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2304 // link key sufficient for requested security 2305 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2306 break; 2307 } 2308 // not enough 2309 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2310 break; 2311 #endif 2312 2313 // HCI_EVENT_DISCONNECTION_COMPLETE 2314 // has been split, to first notify stack before shutting connection down 2315 // see end of function, too. 2316 case HCI_EVENT_DISCONNECTION_COMPLETE: 2317 if (packet[2]) break; // status != 0 2318 handle = little_endian_read_16(packet, 3); 2319 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2320 if (hci_stack->acl_fragmentation_total_size > 0) { 2321 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2322 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2323 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2324 hci_stack->acl_fragmentation_total_size = 0; 2325 hci_stack->acl_fragmentation_pos = 0; 2326 if (release_buffer){ 2327 hci_release_packet_buffer(); 2328 } 2329 } 2330 } 2331 2332 // re-enable advertisements for le connections if active 2333 conn = hci_connection_for_handle(handle); 2334 if (!conn) break; 2335 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2336 #ifdef ENABLE_BLE 2337 #ifdef ENABLE_LE_PERIPHERAL 2338 if (hci_is_le_connection(conn)){ 2339 hci_reenable_advertisements_if_needed(); 2340 } 2341 #endif 2342 #endif 2343 break; 2344 2345 case HCI_EVENT_HARDWARE_ERROR: 2346 log_error("Hardware Error: 0x%02x", packet[2]); 2347 if (hci_stack->hardware_error_callback){ 2348 (*hci_stack->hardware_error_callback)(packet[2]); 2349 } else { 2350 // if no special requests, just reboot stack 2351 hci_power_control_off(); 2352 hci_power_control_on(); 2353 } 2354 break; 2355 2356 #ifdef ENABLE_CLASSIC 2357 case HCI_EVENT_ROLE_CHANGE: 2358 if (packet[2]) break; // status != 0 2359 reverse_bd_addr(&packet[3], addr); 2360 addr_type = BD_ADDR_TYPE_CLASSIC; 2361 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2362 if (!conn) break; 2363 conn->role = packet[9]; 2364 break; 2365 #endif 2366 2367 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2368 // release packet buffer only for asynchronous transport and if there are not further fragements 2369 if (hci_transport_synchronous()) { 2370 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2371 return; // instead of break: to avoid re-entering hci_run() 2372 } 2373 hci_stack->acl_fragmentation_tx_active = 0; 2374 if (hci_stack->acl_fragmentation_total_size) break; 2375 hci_release_packet_buffer(); 2376 2377 // L2CAP receives this event via the hci_emit_event below 2378 2379 #ifdef ENABLE_CLASSIC 2380 // For SCO, we do the can_send_now_check here 2381 hci_notify_if_sco_can_send_now(); 2382 #endif 2383 break; 2384 2385 #ifdef ENABLE_CLASSIC 2386 case HCI_EVENT_SCO_CAN_SEND_NOW: 2387 // For SCO, we do the can_send_now_check here 2388 hci_stack->sco_can_send_now = 1; 2389 hci_notify_if_sco_can_send_now(); 2390 return; 2391 2392 // explode inquriy results for easier consumption 2393 case HCI_EVENT_INQUIRY_RESULT: 2394 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2395 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2396 gap_inquiry_explode(packet); 2397 break; 2398 #endif 2399 2400 #ifdef ENABLE_BLE 2401 case HCI_EVENT_LE_META: 2402 switch (packet[2]){ 2403 #ifdef ENABLE_LE_CENTRAL 2404 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2405 // log_info("advertising report received"); 2406 if (!hci_stack->le_scanning_enabled) break; 2407 le_handle_advertisement_report(packet, size); 2408 break; 2409 #endif 2410 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2411 // Connection management 2412 reverse_bd_addr(&packet[8], addr); 2413 addr_type = (bd_addr_type_t)packet[7]; 2414 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2415 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2416 2417 #ifdef ENABLE_LE_CENTRAL 2418 // if auto-connect, remove from whitelist in both roles 2419 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2420 hci_remove_from_whitelist(addr_type, addr); 2421 } 2422 // handle error: error is reported only to the initiator -> outgoing connection 2423 if (packet[3]){ 2424 2425 // handle cancelled outgoing connection 2426 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2427 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2428 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2429 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2430 conn = gap_get_outgoing_connection(); 2431 } 2432 2433 // outgoing connection establishment is done 2434 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2435 // remove entry 2436 if (conn){ 2437 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2438 btstack_memory_hci_connection_free( conn ); 2439 } 2440 break; 2441 } 2442 #endif 2443 // on success, both hosts receive connection complete event 2444 if (packet[6] == HCI_ROLE_MASTER){ 2445 #ifdef ENABLE_LE_CENTRAL 2446 // if we're master, it was an outgoing connection and we're done with it 2447 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2448 #endif 2449 } else { 2450 #ifdef ENABLE_LE_PERIPHERAL 2451 // if we're slave, it was an incoming connection, advertisements have stopped 2452 hci_stack->le_advertisements_active = 0; 2453 #endif 2454 } 2455 // LE connections are auto-accepted, so just create a connection if there isn't one already 2456 if (!conn){ 2457 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2458 } 2459 // no memory, sorry. 2460 if (!conn){ 2461 break; 2462 } 2463 2464 conn->state = OPEN; 2465 conn->role = packet[6]; 2466 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2467 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2468 2469 #ifdef ENABLE_LE_PERIPHERAL 2470 if (packet[6] == HCI_ROLE_SLAVE){ 2471 hci_reenable_advertisements_if_needed(); 2472 } 2473 #endif 2474 2475 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2476 2477 // restart timer 2478 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2479 // btstack_run_loop_add_timer(&conn->timeout); 2480 2481 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2482 2483 hci_emit_nr_connections_changed(); 2484 break; 2485 2486 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2487 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2488 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2489 conn = hci_connection_for_handle(handle); 2490 if (!conn) break; 2491 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2492 break; 2493 2494 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2495 // connection 2496 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2497 conn = hci_connection_for_handle(handle); 2498 if (conn) { 2499 // read arguments 2500 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2501 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2502 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2503 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2504 2505 // validate against current connection parameter range 2506 le_connection_parameter_range_t existing_range; 2507 gap_get_connection_parameter_range(&existing_range); 2508 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2509 if (update_parameter){ 2510 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2511 conn->le_conn_interval_min = le_conn_interval_min; 2512 conn->le_conn_interval_max = le_conn_interval_max; 2513 conn->le_conn_latency = le_conn_latency; 2514 conn->le_supervision_timeout = le_supervision_timeout; 2515 } else { 2516 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2517 } 2518 } 2519 break; 2520 default: 2521 break; 2522 } 2523 break; 2524 #endif 2525 case HCI_EVENT_VENDOR_SPECIFIC: 2526 // Vendor specific commands often create vendor specific event instead of num completed packets 2527 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2528 switch (hci_stack->manufacturer){ 2529 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2530 hci_stack->num_cmd_packets = 1; 2531 break; 2532 default: 2533 break; 2534 } 2535 break; 2536 default: 2537 break; 2538 } 2539 2540 // handle BT initialization 2541 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2542 hci_initializing_event_handler(packet, size); 2543 } 2544 2545 // help with BT sleep 2546 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2547 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2548 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2549 hci_initializing_next_state(); 2550 } 2551 2552 // notify upper stack 2553 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2554 2555 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2556 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2557 if (!packet[2]){ 2558 handle = little_endian_read_16(packet, 3); 2559 hci_connection_t * aConn = hci_connection_for_handle(handle); 2560 if (aConn) { 2561 uint8_t status = aConn->bonding_status; 2562 uint16_t flags = aConn->bonding_flags; 2563 bd_addr_t bd_address; 2564 memcpy(&bd_address, aConn->address, 6); 2565 hci_shutdown_connection(aConn); 2566 // connection struct is gone, don't access anymore 2567 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2568 hci_emit_dedicated_bonding_result(bd_address, status); 2569 } 2570 } 2571 } 2572 } 2573 2574 // execute main loop 2575 hci_run(); 2576 } 2577 2578 #ifdef ENABLE_CLASSIC 2579 2580 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2581 static void sco_schedule_tx(hci_connection_t * conn); 2582 2583 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2584 log_debug("SCO TX Timeout"); 2585 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2586 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2587 if (!conn) return; 2588 2589 // trigger send 2590 conn->sco_tx_ready = 1; 2591 // extra packet if CVSD but SCO buffer is too short 2592 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && hci_stack->sco_data_packet_length < 123){ 2593 conn->sco_tx_ready++; 2594 } 2595 hci_notify_if_sco_can_send_now(); 2596 } 2597 2598 2599 #define SCO_TX_AFTER_RX_MS (6) 2600 2601 static void sco_schedule_tx(hci_connection_t * conn){ 2602 2603 uint32_t now = btstack_run_loop_get_time_ms(); 2604 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2605 int time_delta_ms = sco_tx_ms - now; 2606 2607 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2608 2609 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2610 btstack_run_loop_set_timer(timer, time_delta_ms); 2611 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2612 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2613 btstack_run_loop_add_timer(timer); 2614 } 2615 2616 static void sco_handler(uint8_t * packet, uint16_t size){ 2617 // lookup connection struct 2618 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2619 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2620 if (!conn) return; 2621 2622 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2623 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2624 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2625 packet[2] = 0x3c; 2626 memmove(&packet[3], &packet[23], 63); 2627 size = 63; 2628 } 2629 } 2630 2631 if (hci_have_usb_transport()){ 2632 // Nothing to do 2633 } else { 2634 // 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); 2635 if (hci_stack->synchronous_flow_control_enabled == 0){ 2636 uint32_t now = btstack_run_loop_get_time_ms(); 2637 2638 if (!conn->sco_rx_valid){ 2639 // ignore first 10 packets 2640 conn->sco_rx_count++; 2641 // log_debug("sco rx count %u", conn->sco_rx_count); 2642 if (conn->sco_rx_count == 10) { 2643 // use first timestamp as is and pretent it just started 2644 conn->sco_rx_ms = now; 2645 conn->sco_rx_valid = 1; 2646 conn->sco_rx_count = 0; 2647 sco_schedule_tx(conn); 2648 } 2649 } else { 2650 // track expected arrival timme 2651 conn->sco_rx_count++; 2652 conn->sco_rx_ms += 7; 2653 int delta = (int32_t) (now - conn->sco_rx_ms); 2654 if (delta > 0){ 2655 conn->sco_rx_ms++; 2656 } 2657 // log_debug("sco rx %u", conn->sco_rx_ms); 2658 sco_schedule_tx(conn); 2659 } 2660 } 2661 } 2662 // deliver to app 2663 if (hci_stack->sco_packet_handler) { 2664 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2665 } 2666 2667 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2668 conn->num_packets_completed++; 2669 hci_stack->host_completed_packets = 1; 2670 hci_run(); 2671 #endif 2672 } 2673 #endif 2674 2675 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2676 hci_dump_packet(packet_type, 1, packet, size); 2677 switch (packet_type) { 2678 case HCI_EVENT_PACKET: 2679 event_handler(packet, size); 2680 break; 2681 case HCI_ACL_DATA_PACKET: 2682 acl_handler(packet, size); 2683 break; 2684 #ifdef ENABLE_CLASSIC 2685 case HCI_SCO_DATA_PACKET: 2686 sco_handler(packet, size); 2687 break; 2688 #endif 2689 default: 2690 break; 2691 } 2692 } 2693 2694 /** 2695 * @brief Add event packet handler. 2696 */ 2697 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2698 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2699 } 2700 2701 2702 /** Register HCI packet handlers */ 2703 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2704 hci_stack->acl_packet_handler = handler; 2705 } 2706 2707 #ifdef ENABLE_CLASSIC 2708 /** 2709 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2710 */ 2711 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2712 hci_stack->sco_packet_handler = handler; 2713 } 2714 #endif 2715 2716 static void hci_state_reset(void){ 2717 // no connections yet 2718 hci_stack->connections = NULL; 2719 2720 // keep discoverable/connectable as this has been requested by the client(s) 2721 // hci_stack->discoverable = 0; 2722 // hci_stack->connectable = 0; 2723 // hci_stack->bondable = 1; 2724 // hci_stack->own_addr_type = 0; 2725 2726 // buffer is free 2727 hci_stack->hci_packet_buffer_reserved = 0; 2728 2729 // no pending cmds 2730 hci_stack->decline_reason = 0; 2731 hci_stack->new_scan_enable_value = 0xff; 2732 2733 // LE 2734 #ifdef ENABLE_BLE 2735 memset(hci_stack->le_random_address, 0, 6); 2736 hci_stack->le_random_address_set = 0; 2737 #endif 2738 #ifdef ENABLE_LE_CENTRAL 2739 hci_stack->le_scanning_active = 0; 2740 hci_stack->le_scan_type = 0xff; 2741 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2742 hci_stack->le_whitelist = 0; 2743 hci_stack->le_whitelist_capacity = 0; 2744 #endif 2745 } 2746 2747 #ifdef ENABLE_CLASSIC 2748 /** 2749 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2750 */ 2751 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2752 // store and open remote device db 2753 hci_stack->link_key_db = link_key_db; 2754 if (hci_stack->link_key_db) { 2755 hci_stack->link_key_db->open(); 2756 } 2757 } 2758 #endif 2759 2760 void hci_init(const hci_transport_t *transport, const void *config){ 2761 2762 #ifdef HAVE_MALLOC 2763 if (!hci_stack) { 2764 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2765 } 2766 #else 2767 hci_stack = &hci_stack_static; 2768 #endif 2769 memset(hci_stack, 0, sizeof(hci_stack_t)); 2770 2771 // reference to use transport layer implementation 2772 hci_stack->hci_transport = transport; 2773 2774 // reference to used config 2775 hci_stack->config = config; 2776 2777 // setup pointer for outgoing packet buffer 2778 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2779 2780 // max acl payload size defined in config.h 2781 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2782 2783 // register packet handlers with transport 2784 transport->register_packet_handler(&packet_handler); 2785 2786 hci_stack->state = HCI_STATE_OFF; 2787 2788 // class of device 2789 hci_stack->class_of_device = 0x007a020c; // Smartphone 2790 2791 // bondable by default 2792 hci_stack->bondable = 1; 2793 2794 #ifdef ENABLE_CLASSIC 2795 // classic name 2796 hci_stack->local_name = default_classic_name; 2797 2798 // Master slave policy 2799 hci_stack->master_slave_policy = 1; 2800 #endif 2801 2802 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2803 hci_stack->ssp_enable = 1; 2804 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2805 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2806 hci_stack->ssp_auto_accept = 1; 2807 2808 // voice setting - signed 16 bit pcm data with CVSD over the air 2809 hci_stack->sco_voice_setting = 0x60; 2810 2811 #ifdef ENABLE_LE_CENTRAL 2812 // connection parameter to use for outgoing connections 2813 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2814 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2815 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2816 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2817 hci_stack->le_connection_latency = 4; // 4 2818 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2819 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2820 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2821 2822 // default LE Scanning 2823 hci_stack->le_scan_interval = 0x1e0; 2824 hci_stack->le_scan_window = 0x30; 2825 #endif 2826 2827 #ifdef ENABLE_LE_PERIPHERAL 2828 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2829 #endif 2830 2831 // connection parameter range used to answer connection parameter update requests in l2cap 2832 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2833 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2834 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2835 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2836 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2837 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2838 2839 hci_state_reset(); 2840 } 2841 2842 /** 2843 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2844 */ 2845 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2846 hci_stack->chipset = chipset_driver; 2847 2848 // reset chipset driver - init is also called on power_up 2849 if (hci_stack->chipset && hci_stack->chipset->init){ 2850 hci_stack->chipset->init(hci_stack->config); 2851 } 2852 } 2853 2854 /** 2855 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2856 */ 2857 void hci_set_control(const btstack_control_t *hardware_control){ 2858 // references to used control implementation 2859 hci_stack->control = hardware_control; 2860 // init with transport config 2861 hardware_control->init(hci_stack->config); 2862 } 2863 2864 void hci_close(void){ 2865 // close remote device db 2866 if (hci_stack->link_key_db) { 2867 hci_stack->link_key_db->close(); 2868 } 2869 2870 btstack_linked_list_iterator_t lit; 2871 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2872 while (btstack_linked_list_iterator_has_next(&lit)){ 2873 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2874 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2875 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2876 hci_shutdown_connection(connection); 2877 } 2878 2879 hci_power_control(HCI_POWER_OFF); 2880 2881 #ifdef HAVE_MALLOC 2882 free(hci_stack); 2883 #endif 2884 hci_stack = NULL; 2885 } 2886 2887 #ifdef ENABLE_CLASSIC 2888 void gap_set_class_of_device(uint32_t class_of_device){ 2889 hci_stack->class_of_device = class_of_device; 2890 } 2891 2892 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2893 hci_stack->default_link_policy_settings = default_link_policy_settings; 2894 } 2895 2896 void hci_disable_l2cap_timeout_check(void){ 2897 disable_l2cap_timeouts = 1; 2898 } 2899 #endif 2900 2901 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2902 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2903 void hci_set_bd_addr(bd_addr_t addr){ 2904 memcpy(hci_stack->custom_bd_addr, addr, 6); 2905 hci_stack->custom_bd_addr_set = 1; 2906 } 2907 #endif 2908 2909 // State-Module-Driver overview 2910 // state module low-level 2911 // HCI_STATE_OFF off close 2912 // HCI_STATE_INITIALIZING, on open 2913 // HCI_STATE_WORKING, on open 2914 // HCI_STATE_HALTING, on open 2915 // HCI_STATE_SLEEPING, off/sleep close 2916 // HCI_STATE_FALLING_ASLEEP on open 2917 2918 static int hci_power_control_on(void){ 2919 2920 // power on 2921 int err = 0; 2922 if (hci_stack->control && hci_stack->control->on){ 2923 err = (*hci_stack->control->on)(); 2924 } 2925 if (err){ 2926 log_error( "POWER_ON failed"); 2927 hci_emit_hci_open_failed(); 2928 return err; 2929 } 2930 2931 // int chipset driver 2932 if (hci_stack->chipset && hci_stack->chipset->init){ 2933 hci_stack->chipset->init(hci_stack->config); 2934 } 2935 2936 // init transport 2937 if (hci_stack->hci_transport->init){ 2938 hci_stack->hci_transport->init(hci_stack->config); 2939 } 2940 2941 // open transport 2942 err = hci_stack->hci_transport->open(); 2943 if (err){ 2944 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2945 if (hci_stack->control && hci_stack->control->off){ 2946 (*hci_stack->control->off)(); 2947 } 2948 hci_emit_hci_open_failed(); 2949 return err; 2950 } 2951 return 0; 2952 } 2953 2954 static void hci_power_control_off(void){ 2955 2956 log_info("hci_power_control_off"); 2957 2958 // close low-level device 2959 hci_stack->hci_transport->close(); 2960 2961 log_info("hci_power_control_off - hci_transport closed"); 2962 2963 // power off 2964 if (hci_stack->control && hci_stack->control->off){ 2965 (*hci_stack->control->off)(); 2966 } 2967 2968 log_info("hci_power_control_off - control closed"); 2969 2970 hci_stack->state = HCI_STATE_OFF; 2971 } 2972 2973 static void hci_power_control_sleep(void){ 2974 2975 log_info("hci_power_control_sleep"); 2976 2977 #if 0 2978 // don't close serial port during sleep 2979 2980 // close low-level device 2981 hci_stack->hci_transport->close(hci_stack->config); 2982 #endif 2983 2984 // sleep mode 2985 if (hci_stack->control && hci_stack->control->sleep){ 2986 (*hci_stack->control->sleep)(); 2987 } 2988 2989 hci_stack->state = HCI_STATE_SLEEPING; 2990 } 2991 2992 static int hci_power_control_wake(void){ 2993 2994 log_info("hci_power_control_wake"); 2995 2996 // wake on 2997 if (hci_stack->control && hci_stack->control->wake){ 2998 (*hci_stack->control->wake)(); 2999 } 3000 3001 #if 0 3002 // open low-level device 3003 int err = hci_stack->hci_transport->open(hci_stack->config); 3004 if (err){ 3005 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3006 if (hci_stack->control && hci_stack->control->off){ 3007 (*hci_stack->control->off)(); 3008 } 3009 hci_emit_hci_open_failed(); 3010 return err; 3011 } 3012 #endif 3013 3014 return 0; 3015 } 3016 3017 static void hci_power_transition_to_initializing(void){ 3018 // set up state machine 3019 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3020 hci_stack->hci_packet_buffer_reserved = 0; 3021 hci_stack->state = HCI_STATE_INITIALIZING; 3022 hci_stack->substate = HCI_INIT_SEND_RESET; 3023 } 3024 3025 int hci_power_control(HCI_POWER_MODE power_mode){ 3026 3027 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3028 3029 int err = 0; 3030 switch (hci_stack->state){ 3031 3032 case HCI_STATE_OFF: 3033 switch (power_mode){ 3034 case HCI_POWER_ON: 3035 err = hci_power_control_on(); 3036 if (err) { 3037 log_error("hci_power_control_on() error %d", err); 3038 return err; 3039 } 3040 hci_power_transition_to_initializing(); 3041 break; 3042 case HCI_POWER_OFF: 3043 // do nothing 3044 break; 3045 case HCI_POWER_SLEEP: 3046 // do nothing (with SLEEP == OFF) 3047 break; 3048 } 3049 break; 3050 3051 case HCI_STATE_INITIALIZING: 3052 switch (power_mode){ 3053 case HCI_POWER_ON: 3054 // do nothing 3055 break; 3056 case HCI_POWER_OFF: 3057 // no connections yet, just turn it off 3058 hci_power_control_off(); 3059 break; 3060 case HCI_POWER_SLEEP: 3061 // no connections yet, just turn it off 3062 hci_power_control_sleep(); 3063 break; 3064 } 3065 break; 3066 3067 case HCI_STATE_WORKING: 3068 switch (power_mode){ 3069 case HCI_POWER_ON: 3070 // do nothing 3071 break; 3072 case HCI_POWER_OFF: 3073 // see hci_run 3074 hci_stack->state = HCI_STATE_HALTING; 3075 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3076 break; 3077 case HCI_POWER_SLEEP: 3078 // see hci_run 3079 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3080 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3081 break; 3082 } 3083 break; 3084 3085 case HCI_STATE_HALTING: 3086 switch (power_mode){ 3087 case HCI_POWER_ON: 3088 hci_power_transition_to_initializing(); 3089 break; 3090 case HCI_POWER_OFF: 3091 // do nothing 3092 break; 3093 case HCI_POWER_SLEEP: 3094 // see hci_run 3095 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3096 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3097 break; 3098 } 3099 break; 3100 3101 case HCI_STATE_FALLING_ASLEEP: 3102 switch (power_mode){ 3103 case HCI_POWER_ON: 3104 3105 #ifdef HAVE_PLATFORM_IPHONE_OS 3106 // nothing to do, if H4 supports power management 3107 if (btstack_control_iphone_power_management_enabled()){ 3108 hci_stack->state = HCI_STATE_INITIALIZING; 3109 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3110 break; 3111 } 3112 #endif 3113 hci_power_transition_to_initializing(); 3114 break; 3115 case HCI_POWER_OFF: 3116 // see hci_run 3117 hci_stack->state = HCI_STATE_HALTING; 3118 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3119 break; 3120 case HCI_POWER_SLEEP: 3121 // do nothing 3122 break; 3123 } 3124 break; 3125 3126 case HCI_STATE_SLEEPING: 3127 switch (power_mode){ 3128 case HCI_POWER_ON: 3129 3130 #ifdef HAVE_PLATFORM_IPHONE_OS 3131 // nothing to do, if H4 supports power management 3132 if (btstack_control_iphone_power_management_enabled()){ 3133 hci_stack->state = HCI_STATE_INITIALIZING; 3134 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3135 hci_update_scan_enable(); 3136 break; 3137 } 3138 #endif 3139 err = hci_power_control_wake(); 3140 if (err) return err; 3141 hci_power_transition_to_initializing(); 3142 break; 3143 case HCI_POWER_OFF: 3144 hci_stack->state = HCI_STATE_HALTING; 3145 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3146 break; 3147 case HCI_POWER_SLEEP: 3148 // do nothing 3149 break; 3150 } 3151 break; 3152 } 3153 3154 // create internal event 3155 hci_emit_state(); 3156 3157 // trigger next/first action 3158 hci_run(); 3159 3160 return 0; 3161 } 3162 3163 3164 #ifdef ENABLE_CLASSIC 3165 3166 static void hci_update_scan_enable(void){ 3167 // 2 = page scan, 1 = inq scan 3168 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3169 hci_run(); 3170 } 3171 3172 void gap_discoverable_control(uint8_t enable){ 3173 if (enable) enable = 1; // normalize argument 3174 3175 if (hci_stack->discoverable == enable){ 3176 hci_emit_discoverable_enabled(hci_stack->discoverable); 3177 return; 3178 } 3179 3180 hci_stack->discoverable = enable; 3181 hci_update_scan_enable(); 3182 } 3183 3184 void gap_connectable_control(uint8_t enable){ 3185 if (enable) enable = 1; // normalize argument 3186 3187 // don't emit event 3188 if (hci_stack->connectable == enable) return; 3189 3190 hci_stack->connectable = enable; 3191 hci_update_scan_enable(); 3192 } 3193 #endif 3194 3195 void gap_local_bd_addr(bd_addr_t address_buffer){ 3196 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3197 } 3198 3199 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3200 static void hci_host_num_completed_packets(void){ 3201 3202 // create packet manually as arrays are not supported and num_commands should not get reduced 3203 hci_reserve_packet_buffer(); 3204 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3205 3206 uint16_t size = 0; 3207 uint16_t num_handles = 0; 3208 packet[size++] = 0x35; 3209 packet[size++] = 0x0c; 3210 size++; // skip param len 3211 size++; // skip num handles 3212 3213 // add { handle, packets } entries 3214 btstack_linked_item_t * it; 3215 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3216 hci_connection_t * connection = (hci_connection_t *) it; 3217 if (connection->num_packets_completed){ 3218 little_endian_store_16(packet, size, connection->con_handle); 3219 size += 2; 3220 little_endian_store_16(packet, size, connection->num_packets_completed); 3221 size += 2; 3222 // 3223 num_handles++; 3224 connection->num_packets_completed = 0; 3225 } 3226 } 3227 3228 packet[2] = size - 3; 3229 packet[3] = num_handles; 3230 3231 hci_stack->host_completed_packets = 0; 3232 3233 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3234 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3235 3236 // release packet buffer for synchronous transport implementations 3237 if (hci_transport_synchronous()){ 3238 hci_release_packet_buffer(); 3239 hci_emit_transport_packet_sent(); 3240 } 3241 } 3242 #endif 3243 3244 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3245 UNUSED(ds); 3246 hci_stack->substate = HCI_HALTING_CLOSE; 3247 // allow packet handlers to defer final shutdown 3248 hci_emit_state(); 3249 hci_run(); 3250 } 3251 3252 static void hci_run(void){ 3253 3254 // log_info("hci_run: entered"); 3255 btstack_linked_item_t * it; 3256 3257 // send continuation fragments first, as they block the prepared packet buffer 3258 if (hci_stack->acl_fragmentation_total_size > 0) { 3259 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3260 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3261 if (connection) { 3262 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3263 hci_send_acl_packet_fragments(connection); 3264 return; 3265 } 3266 } else { 3267 // connection gone -> discard further fragments 3268 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3269 hci_stack->acl_fragmentation_total_size = 0; 3270 hci_stack->acl_fragmentation_pos = 0; 3271 } 3272 } 3273 3274 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3275 // send host num completed packets next as they don't require num_cmd_packets > 0 3276 if (!hci_can_send_comand_packet_transport()) return; 3277 if (hci_stack->host_completed_packets){ 3278 hci_host_num_completed_packets(); 3279 return; 3280 } 3281 #endif 3282 3283 if (!hci_can_send_command_packet_now()) return; 3284 3285 // global/non-connection oriented commands 3286 3287 #ifdef ENABLE_CLASSIC 3288 // decline incoming connections 3289 if (hci_stack->decline_reason){ 3290 uint8_t reason = hci_stack->decline_reason; 3291 hci_stack->decline_reason = 0; 3292 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3293 return; 3294 } 3295 // send scan enable 3296 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3297 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3298 hci_stack->new_scan_enable_value = 0xff; 3299 return; 3300 } 3301 // start/stop inquiry 3302 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3303 uint8_t duration = hci_stack->inquiry_state; 3304 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3305 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3306 return; 3307 } 3308 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3309 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3310 hci_send_cmd(&hci_inquiry_cancel); 3311 return; 3312 } 3313 // remote name request 3314 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3315 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3316 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3317 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3318 return; 3319 } 3320 // pairing 3321 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3322 uint8_t state = hci_stack->gap_pairing_state; 3323 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3324 switch (state){ 3325 case GAP_PAIRING_STATE_SEND_PIN: 3326 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); 3327 break; 3328 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3329 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3330 break; 3331 case GAP_PAIRING_STATE_SEND_PASSKEY: 3332 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3333 break; 3334 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3335 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3336 break; 3337 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3338 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3339 break; 3340 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3341 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3342 break; 3343 default: 3344 break; 3345 } 3346 return; 3347 } 3348 #endif 3349 3350 #ifdef ENABLE_BLE 3351 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3352 if ((hci_stack->state == HCI_STATE_WORKING) 3353 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3354 3355 #ifdef ENABLE_LE_CENTRAL 3356 // handle le scan 3357 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3358 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3359 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3360 return; 3361 } 3362 if (hci_stack->le_scan_type != 0xff){ 3363 // defaults: active scanning, accept all advertisement packets 3364 int scan_type = hci_stack->le_scan_type; 3365 hci_stack->le_scan_type = 0xff; 3366 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); 3367 return; 3368 } 3369 #endif 3370 #ifdef ENABLE_LE_PERIPHERAL 3371 // le advertisement control 3372 if (hci_stack->le_advertisements_todo){ 3373 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3374 } 3375 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3376 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3377 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3378 return; 3379 } 3380 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3381 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3382 hci_send_cmd(&hci_le_set_advertising_parameters, 3383 hci_stack->le_advertisements_interval_min, 3384 hci_stack->le_advertisements_interval_max, 3385 hci_stack->le_advertisements_type, 3386 hci_stack->le_own_addr_type, 3387 hci_stack->le_advertisements_direct_address_type, 3388 hci_stack->le_advertisements_direct_address, 3389 hci_stack->le_advertisements_channel_map, 3390 hci_stack->le_advertisements_filter_policy); 3391 return; 3392 } 3393 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3394 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3395 uint8_t adv_data_clean[31]; 3396 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3397 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3398 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3399 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3400 return; 3401 } 3402 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3403 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3404 uint8_t scan_data_clean[31]; 3405 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3406 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3407 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3408 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3409 return; 3410 } 3411 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3412 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3413 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3414 return; 3415 } 3416 #endif 3417 3418 #ifdef ENABLE_LE_CENTRAL 3419 // 3420 // LE Whitelist Management 3421 // 3422 3423 // check if whitelist needs modification 3424 btstack_linked_list_iterator_t lit; 3425 int modification_pending = 0; 3426 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3427 while (btstack_linked_list_iterator_has_next(&lit)){ 3428 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3429 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3430 modification_pending = 1; 3431 break; 3432 } 3433 } 3434 3435 if (modification_pending){ 3436 // stop connnecting if modification pending 3437 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3438 hci_send_cmd(&hci_le_create_connection_cancel); 3439 return; 3440 } 3441 3442 // add/remove entries 3443 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3444 while (btstack_linked_list_iterator_has_next(&lit)){ 3445 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3446 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3447 entry->state = LE_WHITELIST_ON_CONTROLLER; 3448 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3449 return; 3450 3451 } 3452 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3453 bd_addr_t address; 3454 bd_addr_type_t address_type = entry->address_type; 3455 memcpy(address, entry->address, 6); 3456 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3457 btstack_memory_whitelist_entry_free(entry); 3458 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3459 return; 3460 } 3461 } 3462 } 3463 3464 // start connecting 3465 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3466 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3467 bd_addr_t null_addr; 3468 memset(null_addr, 0, 6); 3469 hci_send_cmd(&hci_le_create_connection, 3470 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3471 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3472 1, // use whitelist 3473 0, // peer address type 3474 null_addr, // peer bd addr 3475 hci_stack->le_own_addr_type, // our addr type: 3476 hci_stack->le_connection_interval_min, // conn interval min 3477 hci_stack->le_connection_interval_max, // conn interval max 3478 hci_stack->le_connection_latency, // conn latency 3479 hci_stack->le_supervision_timeout, // conn latency 3480 hci_stack->le_minimum_ce_length, // min ce length 3481 hci_stack->le_maximum_ce_length // max ce length 3482 ); 3483 return; 3484 } 3485 #endif 3486 } 3487 #endif 3488 3489 // send pending HCI commands 3490 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3491 hci_connection_t * connection = (hci_connection_t *) it; 3492 3493 switch(connection->state){ 3494 case SEND_CREATE_CONNECTION: 3495 switch(connection->address_type){ 3496 #ifdef ENABLE_CLASSIC 3497 case BD_ADDR_TYPE_CLASSIC: 3498 log_info("sending hci_create_connection"); 3499 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3500 break; 3501 #endif 3502 default: 3503 #ifdef ENABLE_BLE 3504 #ifdef ENABLE_LE_CENTRAL 3505 // track outgoing connection 3506 hci_stack->outgoing_addr_type = connection->address_type; 3507 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3508 log_info("sending hci_le_create_connection"); 3509 hci_send_cmd(&hci_le_create_connection, 3510 hci_stack->le_connection_scan_interval, // conn scan interval 3511 hci_stack->le_connection_scan_window, // conn scan windows 3512 0, // don't use whitelist 3513 connection->address_type, // peer address type 3514 connection->address, // peer bd addr 3515 hci_stack->le_own_addr_type, // our addr type: 3516 hci_stack->le_connection_interval_min, // conn interval min 3517 hci_stack->le_connection_interval_max, // conn interval max 3518 hci_stack->le_connection_latency, // conn latency 3519 hci_stack->le_supervision_timeout, // conn latency 3520 hci_stack->le_minimum_ce_length, // min ce length 3521 hci_stack->le_maximum_ce_length // max ce length 3522 ); 3523 connection->state = SENT_CREATE_CONNECTION; 3524 #endif 3525 #endif 3526 break; 3527 } 3528 return; 3529 3530 #ifdef ENABLE_CLASSIC 3531 case RECEIVED_CONNECTION_REQUEST: 3532 connection->role = HCI_ROLE_SLAVE; 3533 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3534 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3535 connection->state = ACCEPTED_CONNECTION_REQUEST; 3536 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3537 } 3538 return; 3539 #endif 3540 3541 #ifdef ENABLE_BLE 3542 #ifdef ENABLE_LE_CENTRAL 3543 case SEND_CANCEL_CONNECTION: 3544 connection->state = SENT_CANCEL_CONNECTION; 3545 hci_send_cmd(&hci_le_create_connection_cancel); 3546 return; 3547 #endif 3548 #endif 3549 case SEND_DISCONNECT: 3550 connection->state = SENT_DISCONNECT; 3551 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3552 return; 3553 3554 default: 3555 break; 3556 } 3557 3558 // no further commands if connection is about to get shut down 3559 if (connection->state == SENT_DISCONNECT) continue; 3560 3561 #ifdef ENABLE_CLASSIC 3562 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3563 log_info("responding to link key request"); 3564 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3565 link_key_t link_key; 3566 link_key_type_t link_key_type; 3567 if ( hci_stack->link_key_db 3568 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3569 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3570 connection->link_key_type = link_key_type; 3571 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3572 } else { 3573 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3574 } 3575 return; 3576 } 3577 3578 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3579 log_info("denying to pin request"); 3580 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3581 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3582 return; 3583 } 3584 3585 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3586 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3587 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3588 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3589 // tweak authentication requirements 3590 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3591 if (connection->bonding_flags & BONDING_DEDICATED){ 3592 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3593 } 3594 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3595 authreq |= 1; 3596 } 3597 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3598 } else { 3599 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3600 } 3601 return; 3602 } 3603 3604 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3605 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3606 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3607 return; 3608 } 3609 3610 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3611 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3612 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3613 return; 3614 } 3615 3616 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3617 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3618 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3619 return; 3620 } 3621 3622 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3623 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3624 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3625 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3626 return; 3627 } 3628 3629 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3630 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3631 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3632 return; 3633 } 3634 3635 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3636 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3637 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3638 return; 3639 } 3640 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3641 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3642 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3643 return; 3644 } 3645 #endif 3646 3647 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3648 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3649 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3650 return; 3651 } 3652 3653 #ifdef ENABLE_CLASSIC 3654 uint16_t sniff_min_interval; 3655 switch (connection->sniff_min_interval){ 3656 case 0: 3657 break; 3658 case 0xffff: 3659 connection->sniff_min_interval = 0; 3660 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3661 return; 3662 default: 3663 sniff_min_interval = connection->sniff_min_interval; 3664 connection->sniff_min_interval = 0; 3665 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3666 return; 3667 } 3668 #endif 3669 3670 #ifdef ENABLE_BLE 3671 switch (connection->le_con_parameter_update_state){ 3672 // response to L2CAP CON PARAMETER UPDATE REQUEST 3673 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3674 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3675 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3676 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3677 0x0000, 0xffff); 3678 return; 3679 case CON_PARAMETER_UPDATE_REPLY: 3680 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3681 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3682 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3683 0x0000, 0xffff); 3684 return; 3685 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3686 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3687 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3688 return; 3689 default: 3690 break; 3691 } 3692 if (connection->le_phy_update_all_phys != 0xff){ 3693 uint8_t all_phys = connection->le_phy_update_all_phys; 3694 connection->le_phy_update_all_phys = 0xff; 3695 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); 3696 return; 3697 } 3698 #endif 3699 } 3700 3701 hci_connection_t * connection; 3702 switch (hci_stack->state){ 3703 case HCI_STATE_INITIALIZING: 3704 hci_initializing_run(); 3705 break; 3706 3707 case HCI_STATE_HALTING: 3708 3709 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3710 switch (hci_stack->substate){ 3711 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3712 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3713 3714 #ifdef ENABLE_BLE 3715 #ifdef ENABLE_LE_CENTRAL 3716 // free whitelist entries 3717 { 3718 btstack_linked_list_iterator_t lit; 3719 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3720 while (btstack_linked_list_iterator_has_next(&lit)){ 3721 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3722 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3723 btstack_memory_whitelist_entry_free(entry); 3724 } 3725 } 3726 #endif 3727 #endif 3728 // close all open connections 3729 connection = (hci_connection_t *) hci_stack->connections; 3730 if (connection){ 3731 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3732 if (!hci_can_send_command_packet_now()) return; 3733 3734 // check state 3735 if (connection->state == SENT_DISCONNECT) return; 3736 connection->state = SENT_DISCONNECT; 3737 3738 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3739 3740 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3741 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3742 3743 // ... which would be ignored anyway as we shutdown (free) the connection now 3744 hci_shutdown_connection(connection); 3745 3746 // finally, send the disconnect command 3747 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3748 return; 3749 } 3750 3751 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3752 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3753 log_info("HCI_STATE_HALTING: wait 50 ms"); 3754 hci_stack->substate = HCI_HALTING_W4_TIMER; 3755 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3756 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3757 btstack_run_loop_add_timer(&hci_stack->timeout); 3758 break; 3759 } 3760 3761 /* explicit fall-through */ 3762 3763 case HCI_HALTING_CLOSE: 3764 log_info("HCI_STATE_HALTING, calling off"); 3765 3766 // switch mode 3767 hci_power_control_off(); 3768 3769 log_info("HCI_STATE_HALTING, emitting state"); 3770 hci_emit_state(); 3771 log_info("HCI_STATE_HALTING, done"); 3772 break; 3773 3774 case HCI_HALTING_W4_TIMER: 3775 // keep waiting 3776 3777 break; 3778 default: 3779 break; 3780 } 3781 3782 break; 3783 3784 case HCI_STATE_FALLING_ASLEEP: 3785 switch(hci_stack->substate) { 3786 case HCI_FALLING_ASLEEP_DISCONNECT: 3787 log_info("HCI_STATE_FALLING_ASLEEP"); 3788 // close all open connections 3789 connection = (hci_connection_t *) hci_stack->connections; 3790 3791 #ifdef HAVE_PLATFORM_IPHONE_OS 3792 // don't close connections, if H4 supports power management 3793 if (btstack_control_iphone_power_management_enabled()){ 3794 connection = NULL; 3795 } 3796 #endif 3797 if (connection){ 3798 3799 // send disconnect 3800 if (!hci_can_send_command_packet_now()) return; 3801 3802 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3803 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3804 3805 // send disconnected event right away - causes higher layer connections to get closed, too. 3806 hci_shutdown_connection(connection); 3807 return; 3808 } 3809 3810 if (hci_classic_supported()){ 3811 // disable page and inquiry scan 3812 if (!hci_can_send_command_packet_now()) return; 3813 3814 log_info("HCI_STATE_HALTING, disabling inq scans"); 3815 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3816 3817 // continue in next sub state 3818 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3819 break; 3820 } 3821 // no break - fall through for ble-only chips 3822 3823 case HCI_FALLING_ASLEEP_COMPLETE: 3824 log_info("HCI_STATE_HALTING, calling sleep"); 3825 #ifdef HAVE_PLATFORM_IPHONE_OS 3826 // don't actually go to sleep, if H4 supports power management 3827 if (btstack_control_iphone_power_management_enabled()){ 3828 // SLEEP MODE reached 3829 hci_stack->state = HCI_STATE_SLEEPING; 3830 hci_emit_state(); 3831 break; 3832 } 3833 #endif 3834 // switch mode 3835 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3836 hci_emit_state(); 3837 break; 3838 3839 default: 3840 break; 3841 } 3842 break; 3843 3844 default: 3845 break; 3846 } 3847 } 3848 3849 int hci_send_cmd_packet(uint8_t *packet, int size){ 3850 // house-keeping 3851 3852 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3853 hci_stack->loopback_mode = packet[3]; 3854 } 3855 3856 #ifdef ENABLE_CLASSIC 3857 bd_addr_t addr; 3858 hci_connection_t * conn; 3859 3860 // create_connection? 3861 if (IS_COMMAND(packet, hci_create_connection)){ 3862 reverse_bd_addr(&packet[3], addr); 3863 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3864 3865 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3866 if (!conn){ 3867 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3868 if (!conn){ 3869 // notify client that alloc failed 3870 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3871 return -1; // packet not sent to controller 3872 } 3873 conn->state = SEND_CREATE_CONNECTION; 3874 } 3875 log_info("conn state %u", conn->state); 3876 switch (conn->state){ 3877 // if connection active exists 3878 case OPEN: 3879 // and OPEN, emit connection complete command 3880 hci_emit_connection_complete(addr, conn->con_handle, 0); 3881 return -1; // packet not sent to controller 3882 case SEND_CREATE_CONNECTION: 3883 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3884 break; 3885 default: 3886 // otherwise, just ignore as it is already in the open process 3887 return -1; // packet not sent to controller 3888 } 3889 conn->state = SENT_CREATE_CONNECTION; 3890 3891 // track outgoing connection 3892 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3893 memcpy(hci_stack->outgoing_addr, addr, 6); 3894 } 3895 3896 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3897 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3898 } 3899 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3900 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3901 } 3902 3903 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3904 if (hci_stack->link_key_db){ 3905 reverse_bd_addr(&packet[3], addr); 3906 hci_stack->link_key_db->delete_link_key(addr); 3907 } 3908 } 3909 3910 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3911 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3912 reverse_bd_addr(&packet[3], addr); 3913 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3914 if (conn){ 3915 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3916 } 3917 } 3918 3919 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3920 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3921 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3922 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3923 reverse_bd_addr(&packet[3], addr); 3924 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3925 if (conn){ 3926 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3927 } 3928 } 3929 3930 #ifdef ENABLE_SCO_OVER_HCI 3931 // setup_synchronous_connection? Voice setting at offset 22 3932 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3933 // TODO: compare to current setting if sco connection already active 3934 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3935 } 3936 // accept_synchronus_connection? Voice setting at offset 18 3937 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3938 // TODO: compare to current setting if sco connection already active 3939 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3940 } 3941 #endif 3942 #endif 3943 3944 #ifdef ENABLE_BLE 3945 #ifdef ENABLE_LE_PERIPHERAL 3946 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3947 hci_stack->le_random_address_set = 1; 3948 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3949 } 3950 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3951 hci_stack->le_advertisements_active = packet[3]; 3952 } 3953 #endif 3954 #ifdef ENABLE_LE_CENTRAL 3955 if (IS_COMMAND(packet, hci_le_create_connection)){ 3956 // white list used? 3957 uint8_t initiator_filter_policy = packet[7]; 3958 switch (initiator_filter_policy){ 3959 case 0: 3960 // whitelist not used 3961 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3962 break; 3963 case 1: 3964 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3965 break; 3966 default: 3967 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3968 break; 3969 } 3970 } 3971 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3972 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3973 } 3974 #endif 3975 #endif 3976 3977 hci_stack->num_cmd_packets--; 3978 3979 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3980 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3981 } 3982 3983 // disconnect because of security block 3984 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3985 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3986 if (!connection) return; 3987 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3988 } 3989 3990 3991 // Configure Secure Simple Pairing 3992 3993 #ifdef ENABLE_CLASSIC 3994 3995 // enable will enable SSP during init 3996 void gap_ssp_set_enable(int enable){ 3997 hci_stack->ssp_enable = enable; 3998 } 3999 4000 static int hci_local_ssp_activated(void){ 4001 return gap_ssp_supported() && hci_stack->ssp_enable; 4002 } 4003 4004 // if set, BTstack will respond to io capability request using authentication requirement 4005 void gap_ssp_set_io_capability(int io_capability){ 4006 hci_stack->ssp_io_capability = io_capability; 4007 } 4008 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4009 hci_stack->ssp_authentication_requirement = authentication_requirement; 4010 } 4011 4012 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4013 void gap_ssp_set_auto_accept(int auto_accept){ 4014 hci_stack->ssp_auto_accept = auto_accept; 4015 } 4016 #endif 4017 4018 // va_list part of hci_send_cmd 4019 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4020 if (!hci_can_send_command_packet_now()){ 4021 log_error("hci_send_cmd called but cannot send packet now"); 4022 return 0; 4023 } 4024 4025 // for HCI INITIALIZATION 4026 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4027 hci_stack->last_cmd_opcode = cmd->opcode; 4028 4029 hci_reserve_packet_buffer(); 4030 uint8_t * packet = hci_stack->hci_packet_buffer; 4031 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4032 int err = hci_send_cmd_packet(packet, size); 4033 4034 // release packet buffer for synchronous transport implementations 4035 if (hci_transport_synchronous()){ 4036 hci_release_packet_buffer(); 4037 hci_emit_transport_packet_sent(); 4038 } 4039 4040 return err; 4041 } 4042 4043 /** 4044 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4045 */ 4046 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4047 va_list argptr; 4048 va_start(argptr, cmd); 4049 int res = hci_send_cmd_va_arg(cmd, argptr); 4050 va_end(argptr); 4051 return res; 4052 } 4053 4054 // Create various non-HCI events. 4055 // TODO: generalize, use table similar to hci_create_command 4056 4057 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4058 // dump packet 4059 if (dump) { 4060 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4061 } 4062 4063 // dispatch to all event handlers 4064 btstack_linked_list_iterator_t it; 4065 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4066 while (btstack_linked_list_iterator_has_next(&it)){ 4067 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4068 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4069 } 4070 } 4071 4072 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4073 if (!hci_stack->acl_packet_handler) return; 4074 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4075 } 4076 4077 #ifdef ENABLE_CLASSIC 4078 static void hci_notify_if_sco_can_send_now(void){ 4079 // notify SCO sender if waiting 4080 if (!hci_stack->sco_waiting_for_can_send_now) return; 4081 if (hci_can_send_sco_packet_now()){ 4082 hci_stack->sco_waiting_for_can_send_now = 0; 4083 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4084 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4085 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4086 } 4087 } 4088 4089 // parsing end emitting has been merged to reduce code size 4090 static void gap_inquiry_explode(uint8_t * packet){ 4091 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4092 4093 uint8_t * eir_data; 4094 ad_context_t context; 4095 const uint8_t * name; 4096 uint8_t name_len; 4097 4098 int event_type = hci_event_packet_get_type(packet); 4099 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4100 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4101 4102 // event[1] is set at the end 4103 int i; 4104 for (i=0; i<num_responses;i++){ 4105 memset(event, 0, sizeof(event)); 4106 event[0] = GAP_EVENT_INQUIRY_RESULT; 4107 uint8_t event_size = 18; // if name is not set by EIR 4108 4109 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4110 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4111 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4112 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4113 4114 switch (event_type){ 4115 case HCI_EVENT_INQUIRY_RESULT: 4116 // 14,15,16,17 = 0, size 18 4117 break; 4118 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4119 event[14] = 1; 4120 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4121 // 16,17 = 0, size 18 4122 break; 4123 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4124 event[14] = 1; 4125 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4126 // for EIR packets, there is only one reponse in it 4127 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4128 name = NULL; 4129 // EIR data is 240 bytes in EIR event 4130 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4131 uint8_t data_type = ad_iterator_get_data_type(&context); 4132 uint8_t data_size = ad_iterator_get_data_len(&context); 4133 const uint8_t * data = ad_iterator_get_data(&context); 4134 // Prefer Complete Local Name over Shortend Local Name 4135 switch (data_type){ 4136 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4137 if (name) continue; 4138 /* explicit fall-through */ 4139 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4140 name = data; 4141 name_len = data_size; 4142 break; 4143 default: 4144 break; 4145 } 4146 } 4147 if (name){ 4148 event[16] = 1; 4149 // truncate name if needed 4150 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4151 event[17] = len; 4152 memcpy(&event[18], name, len); 4153 event_size += len; 4154 } 4155 break; 4156 } 4157 event[1] = event_size - 2; 4158 hci_emit_event(event, event_size, 1); 4159 } 4160 } 4161 #endif 4162 4163 void hci_emit_state(void){ 4164 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4165 uint8_t event[3]; 4166 event[0] = BTSTACK_EVENT_STATE; 4167 event[1] = sizeof(event) - 2; 4168 event[2] = hci_stack->state; 4169 hci_emit_event(event, sizeof(event), 1); 4170 } 4171 4172 #ifdef ENABLE_CLASSIC 4173 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4174 uint8_t event[13]; 4175 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4176 event[1] = sizeof(event) - 2; 4177 event[2] = status; 4178 little_endian_store_16(event, 3, con_handle); 4179 reverse_bd_addr(address, &event[5]); 4180 event[11] = 1; // ACL connection 4181 event[12] = 0; // encryption disabled 4182 hci_emit_event(event, sizeof(event), 1); 4183 } 4184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4185 if (disable_l2cap_timeouts) return; 4186 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4187 uint8_t event[4]; 4188 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4189 event[1] = sizeof(event) - 2; 4190 little_endian_store_16(event, 2, conn->con_handle); 4191 hci_emit_event(event, sizeof(event), 1); 4192 } 4193 #endif 4194 4195 #ifdef ENABLE_BLE 4196 #ifdef ENABLE_LE_CENTRAL 4197 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4198 uint8_t event[21]; 4199 event[0] = HCI_EVENT_LE_META; 4200 event[1] = sizeof(event) - 2; 4201 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4202 event[3] = status; 4203 little_endian_store_16(event, 4, con_handle); 4204 event[6] = 0; // TODO: role 4205 event[7] = address_type; 4206 reverse_bd_addr(address, &event[8]); 4207 little_endian_store_16(event, 14, 0); // interval 4208 little_endian_store_16(event, 16, 0); // latency 4209 little_endian_store_16(event, 18, 0); // supervision timeout 4210 event[20] = 0; // master clock accuracy 4211 hci_emit_event(event, sizeof(event), 1); 4212 } 4213 #endif 4214 #endif 4215 4216 static void hci_emit_transport_packet_sent(void){ 4217 // notify upper stack that it might be possible to send again 4218 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4219 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4220 } 4221 4222 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4223 uint8_t event[6]; 4224 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4225 event[1] = sizeof(event) - 2; 4226 event[2] = 0; // status = OK 4227 little_endian_store_16(event, 3, con_handle); 4228 event[5] = reason; 4229 hci_emit_event(event, sizeof(event), 1); 4230 } 4231 4232 static void hci_emit_nr_connections_changed(void){ 4233 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4234 uint8_t event[3]; 4235 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4236 event[1] = sizeof(event) - 2; 4237 event[2] = nr_hci_connections(); 4238 hci_emit_event(event, sizeof(event), 1); 4239 } 4240 4241 static void hci_emit_hci_open_failed(void){ 4242 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4243 uint8_t event[2]; 4244 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4245 event[1] = sizeof(event) - 2; 4246 hci_emit_event(event, sizeof(event), 1); 4247 } 4248 4249 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4250 log_info("hci_emit_dedicated_bonding_result %u ", status); 4251 uint8_t event[9]; 4252 int pos = 0; 4253 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4254 event[pos++] = sizeof(event) - 2; 4255 event[pos++] = status; 4256 reverse_bd_addr(address, &event[pos]); 4257 hci_emit_event(event, sizeof(event), 1); 4258 } 4259 4260 4261 #ifdef ENABLE_CLASSIC 4262 4263 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4264 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4265 uint8_t event[5]; 4266 int pos = 0; 4267 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4268 event[pos++] = sizeof(event) - 2; 4269 little_endian_store_16(event, 2, con_handle); 4270 pos += 2; 4271 event[pos++] = level; 4272 hci_emit_event(event, sizeof(event), 1); 4273 } 4274 4275 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4276 if (!connection) return LEVEL_0; 4277 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4278 return gap_security_level_for_link_key_type(connection->link_key_type); 4279 } 4280 4281 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4282 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4283 uint8_t event[3]; 4284 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4285 event[1] = sizeof(event) - 2; 4286 event[2] = enabled; 4287 hci_emit_event(event, sizeof(event), 1); 4288 } 4289 4290 // query if remote side supports eSCO 4291 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4292 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4293 if (!connection) return 0; 4294 return connection->remote_supported_feature_eSCO; 4295 } 4296 4297 // query if remote side supports SSP 4298 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4299 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4300 if (!connection) return 0; 4301 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4302 } 4303 4304 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4305 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4306 } 4307 4308 // GAP API 4309 /** 4310 * @bbrief enable/disable bonding. default is enabled 4311 * @praram enabled 4312 */ 4313 void gap_set_bondable_mode(int enable){ 4314 hci_stack->bondable = enable ? 1 : 0; 4315 } 4316 /** 4317 * @brief Get bondable mode. 4318 * @return 1 if bondable 4319 */ 4320 int gap_get_bondable_mode(void){ 4321 return hci_stack->bondable; 4322 } 4323 4324 /** 4325 * @brief map link keys to security levels 4326 */ 4327 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4328 switch (link_key_type){ 4329 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4330 return LEVEL_4; 4331 case COMBINATION_KEY: 4332 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4333 return LEVEL_3; 4334 default: 4335 return LEVEL_2; 4336 } 4337 } 4338 4339 /** 4340 * @brief map link keys to secure connection yes/no 4341 */ 4342 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4343 switch (link_key_type){ 4344 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4345 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4346 return 1; 4347 default: 4348 return 0; 4349 } 4350 } 4351 4352 /** 4353 * @brief map link keys to authenticated 4354 */ 4355 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4356 switch (link_key_type){ 4357 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4358 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4359 return 1; 4360 default: 4361 return 0; 4362 } 4363 } 4364 4365 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4366 log_info("gap_mitm_protection_required_for_security_level %u", level); 4367 return level > LEVEL_2; 4368 } 4369 4370 /** 4371 * @brief get current security level 4372 */ 4373 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4374 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4375 if (!connection) return LEVEL_0; 4376 return gap_security_level_for_connection(connection); 4377 } 4378 4379 /** 4380 * @brief request connection to device to 4381 * @result GAP_AUTHENTICATION_RESULT 4382 */ 4383 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4384 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4385 if (!connection){ 4386 hci_emit_security_level(con_handle, LEVEL_0); 4387 return; 4388 } 4389 gap_security_level_t current_level = gap_security_level(con_handle); 4390 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4391 requested_level, connection->requested_security_level, current_level); 4392 4393 // assumption: earlier requested security higher than current level => security request is active 4394 if (current_level < connection->requested_security_level){ 4395 if (connection->requested_security_level < requested_level){ 4396 // increase requested level as new level is higher 4397 4398 // TODO: handle re-authentication when done 4399 4400 connection->requested_security_level = requested_level; 4401 } 4402 return; 4403 } 4404 4405 // no request active, notify if security sufficient 4406 if (requested_level <= current_level){ 4407 hci_emit_security_level(con_handle, current_level); 4408 return; 4409 } 4410 4411 // start pairing to increase security level 4412 connection->requested_security_level = requested_level; 4413 4414 #if 0 4415 // sending encryption request without a link key results in an error. 4416 // TODO: figure out how to use it properly 4417 4418 // would enabling ecnryption suffice (>= LEVEL_2)? 4419 if (hci_stack->link_key_db){ 4420 link_key_type_t link_key_type; 4421 link_key_t link_key; 4422 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4423 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4424 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4425 return; 4426 } 4427 } 4428 } 4429 #endif 4430 4431 // start to authenticate connection 4432 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4433 hci_run(); 4434 } 4435 4436 /** 4437 * @brief start dedicated bonding with device. disconnect after bonding 4438 * @param device 4439 * @param request MITM protection 4440 * @result GAP_DEDICATED_BONDING_COMPLETE 4441 */ 4442 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4443 4444 // create connection state machine 4445 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4446 4447 if (!connection){ 4448 return BTSTACK_MEMORY_ALLOC_FAILED; 4449 } 4450 4451 // delete linkn key 4452 gap_drop_link_key_for_bd_addr(device); 4453 4454 // configure LEVEL_2/3, dedicated bonding 4455 connection->state = SEND_CREATE_CONNECTION; 4456 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4457 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4458 connection->bonding_flags = BONDING_DEDICATED; 4459 4460 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4461 4462 // handle: connnection failure (connection complete != ok) 4463 // handle: authentication failure 4464 // handle: disconnect on done 4465 4466 hci_run(); 4467 4468 return 0; 4469 } 4470 #endif 4471 4472 void gap_set_local_name(const char * local_name){ 4473 hci_stack->local_name = local_name; 4474 } 4475 4476 4477 #ifdef ENABLE_BLE 4478 4479 #ifdef ENABLE_LE_CENTRAL 4480 void gap_start_scan(void){ 4481 hci_stack->le_scanning_enabled = 1; 4482 hci_run(); 4483 } 4484 4485 void gap_stop_scan(void){ 4486 hci_stack->le_scanning_enabled = 0; 4487 hci_run(); 4488 } 4489 4490 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4491 hci_stack->le_scan_type = scan_type; 4492 hci_stack->le_scan_interval = scan_interval; 4493 hci_stack->le_scan_window = scan_window; 4494 hci_run(); 4495 } 4496 4497 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4498 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4499 if (!conn){ 4500 log_info("gap_connect: no connection exists yet, creating context"); 4501 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4502 if (!conn){ 4503 // notify client that alloc failed 4504 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4505 log_info("gap_connect: failed to alloc hci_connection_t"); 4506 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4507 } 4508 conn->state = SEND_CREATE_CONNECTION; 4509 log_info("gap_connect: send create connection next"); 4510 hci_run(); 4511 return 0; 4512 } 4513 4514 if (!hci_is_le_connection(conn) || 4515 conn->state == SEND_CREATE_CONNECTION || 4516 conn->state == SENT_CREATE_CONNECTION) { 4517 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4518 log_error("gap_connect: classic connection or connect is already being created"); 4519 return GATT_CLIENT_IN_WRONG_STATE; 4520 } 4521 4522 log_info("gap_connect: context exists with state %u", conn->state); 4523 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4524 hci_run(); 4525 return 0; 4526 } 4527 4528 // @assumption: only a single outgoing LE Connection exists 4529 static hci_connection_t * gap_get_outgoing_connection(void){ 4530 btstack_linked_item_t *it; 4531 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4532 hci_connection_t * conn = (hci_connection_t *) it; 4533 if (!hci_is_le_connection(conn)) continue; 4534 switch (conn->state){ 4535 case SEND_CREATE_CONNECTION: 4536 case SENT_CREATE_CONNECTION: 4537 case SENT_CANCEL_CONNECTION: 4538 return conn; 4539 default: 4540 break; 4541 }; 4542 } 4543 return NULL; 4544 } 4545 4546 uint8_t gap_connect_cancel(void){ 4547 hci_connection_t * conn = gap_get_outgoing_connection(); 4548 if (!conn) return 0; 4549 switch (conn->state){ 4550 case SEND_CREATE_CONNECTION: 4551 // skip sending create connection and emit event instead 4552 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4553 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4554 btstack_memory_hci_connection_free( conn ); 4555 break; 4556 case SENT_CREATE_CONNECTION: 4557 // request to send cancel connection 4558 conn->state = SEND_CANCEL_CONNECTION; 4559 hci_run(); 4560 break; 4561 default: 4562 break; 4563 } 4564 return 0; 4565 } 4566 #endif 4567 4568 #ifdef ENABLE_LE_CENTRAL 4569 /** 4570 * @brief Set connection parameters for outgoing connections 4571 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4572 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4573 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4574 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4575 * @param conn_latency, default: 4 4576 * @param supervision_timeout (unit: 10ms), default: 720 ms 4577 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4578 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4579 */ 4580 4581 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4582 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4583 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4584 hci_stack->le_connection_scan_interval = conn_scan_interval; 4585 hci_stack->le_connection_scan_window = conn_scan_window; 4586 hci_stack->le_connection_interval_min = conn_interval_min; 4587 hci_stack->le_connection_interval_max = conn_interval_max; 4588 hci_stack->le_connection_latency = conn_latency; 4589 hci_stack->le_supervision_timeout = supervision_timeout; 4590 hci_stack->le_minimum_ce_length = min_ce_length; 4591 hci_stack->le_maximum_ce_length = max_ce_length; 4592 } 4593 #endif 4594 4595 /** 4596 * @brief Updates the connection parameters for a given LE connection 4597 * @param handle 4598 * @param conn_interval_min (unit: 1.25ms) 4599 * @param conn_interval_max (unit: 1.25ms) 4600 * @param conn_latency 4601 * @param supervision_timeout (unit: 10ms) 4602 * @returns 0 if ok 4603 */ 4604 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4605 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4606 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4607 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4608 connection->le_conn_interval_min = conn_interval_min; 4609 connection->le_conn_interval_max = conn_interval_max; 4610 connection->le_conn_latency = conn_latency; 4611 connection->le_supervision_timeout = supervision_timeout; 4612 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4613 hci_run(); 4614 return 0; 4615 } 4616 4617 /** 4618 * @brief Request an update of the connection parameter for a given LE connection 4619 * @param handle 4620 * @param conn_interval_min (unit: 1.25ms) 4621 * @param conn_interval_max (unit: 1.25ms) 4622 * @param conn_latency 4623 * @param supervision_timeout (unit: 10ms) 4624 * @returns 0 if ok 4625 */ 4626 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4627 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4628 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4629 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4630 connection->le_conn_interval_min = conn_interval_min; 4631 connection->le_conn_interval_max = conn_interval_max; 4632 connection->le_conn_latency = conn_latency; 4633 connection->le_supervision_timeout = supervision_timeout; 4634 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4635 hci_run(); 4636 return 0; 4637 } 4638 4639 #ifdef ENABLE_LE_PERIPHERAL 4640 4641 static void gap_advertisments_changed(void){ 4642 // disable advertisements before updating adv, scan data, or adv params 4643 if (hci_stack->le_advertisements_active){ 4644 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4645 } 4646 hci_run(); 4647 } 4648 4649 /** 4650 * @brief Set Advertisement Data 4651 * @param advertising_data_length 4652 * @param advertising_data (max 31 octets) 4653 * @note data is not copied, pointer has to stay valid 4654 */ 4655 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4656 hci_stack->le_advertisements_data_len = advertising_data_length; 4657 hci_stack->le_advertisements_data = advertising_data; 4658 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4659 gap_advertisments_changed(); 4660 } 4661 4662 /** 4663 * @brief Set Scan Response Data 4664 * @param advertising_data_length 4665 * @param advertising_data (max 31 octets) 4666 * @note data is not copied, pointer has to stay valid 4667 */ 4668 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4669 hci_stack->le_scan_response_data_len = scan_response_data_length; 4670 hci_stack->le_scan_response_data = scan_response_data; 4671 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4672 gap_advertisments_changed(); 4673 } 4674 4675 /** 4676 * @brief Set Advertisement Parameters 4677 * @param adv_int_min 4678 * @param adv_int_max 4679 * @param adv_type 4680 * @param direct_address_type 4681 * @param direct_address 4682 * @param channel_map 4683 * @param filter_policy 4684 * 4685 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4686 */ 4687 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4688 uint8_t direct_address_typ, bd_addr_t direct_address, 4689 uint8_t channel_map, uint8_t filter_policy) { 4690 4691 hci_stack->le_advertisements_interval_min = adv_int_min; 4692 hci_stack->le_advertisements_interval_max = adv_int_max; 4693 hci_stack->le_advertisements_type = adv_type; 4694 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4695 hci_stack->le_advertisements_channel_map = channel_map; 4696 hci_stack->le_advertisements_filter_policy = filter_policy; 4697 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4698 4699 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4700 gap_advertisments_changed(); 4701 } 4702 4703 /** 4704 * @brief Enable/Disable Advertisements 4705 * @param enabled 4706 */ 4707 void gap_advertisements_enable(int enabled){ 4708 hci_stack->le_advertisements_enabled = enabled; 4709 if (enabled && !hci_stack->le_advertisements_active){ 4710 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4711 } 4712 if (!enabled && hci_stack->le_advertisements_active){ 4713 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4714 } 4715 hci_run(); 4716 } 4717 4718 #endif 4719 4720 void hci_le_set_own_address_type(uint8_t own_address_type){ 4721 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4722 if (own_address_type == hci_stack->le_own_addr_type) return; 4723 hci_stack->le_own_addr_type = own_address_type; 4724 4725 #ifdef ENABLE_LE_PERIPHERAL 4726 // update advertisement parameters, too 4727 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4728 gap_advertisments_changed(); 4729 #endif 4730 #ifdef ENABLE_LE_CENTRAL 4731 // note: we don't update scan parameters or modify ongoing connection attempts 4732 #endif 4733 } 4734 4735 #endif 4736 4737 uint8_t gap_disconnect(hci_con_handle_t handle){ 4738 hci_connection_t * conn = hci_connection_for_handle(handle); 4739 if (!conn){ 4740 hci_emit_disconnection_complete(handle, 0); 4741 return 0; 4742 } 4743 // ignore if already disconnected 4744 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4745 return 0; 4746 } 4747 conn->state = SEND_DISCONNECT; 4748 hci_run(); 4749 return 0; 4750 } 4751 4752 /** 4753 * @brief Get connection type 4754 * @param con_handle 4755 * @result connection_type 4756 */ 4757 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4758 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4759 if (!conn) return GAP_CONNECTION_INVALID; 4760 switch (conn->address_type){ 4761 case BD_ADDR_TYPE_LE_PUBLIC: 4762 case BD_ADDR_TYPE_LE_RANDOM: 4763 return GAP_CONNECTION_LE; 4764 case BD_ADDR_TYPE_SCO: 4765 return GAP_CONNECTION_SCO; 4766 case BD_ADDR_TYPE_CLASSIC: 4767 return GAP_CONNECTION_ACL; 4768 default: 4769 return GAP_CONNECTION_INVALID; 4770 } 4771 } 4772 4773 #ifdef ENABLE_BLE 4774 4775 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){ 4776 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4777 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4778 4779 conn->le_phy_update_all_phys = all_phys; 4780 conn->le_phy_update_tx_phys = tx_phys; 4781 conn->le_phy_update_rx_phys = rx_phys; 4782 conn->le_phy_update_phy_options = phy_options; 4783 4784 hci_run(); 4785 4786 return 0; 4787 } 4788 4789 #ifdef ENABLE_LE_CENTRAL 4790 /** 4791 * @brief Auto Connection Establishment - Start Connecting to device 4792 * @param address_typ 4793 * @param address 4794 * @returns 0 if ok 4795 */ 4796 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4797 // check capacity 4798 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4799 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4800 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4801 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4802 entry->address_type = address_type; 4803 memcpy(entry->address, address, 6); 4804 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4805 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4806 hci_run(); 4807 return 0; 4808 } 4809 4810 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4811 btstack_linked_list_iterator_t it; 4812 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4813 while (btstack_linked_list_iterator_has_next(&it)){ 4814 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4815 if (entry->address_type != address_type) continue; 4816 if (memcmp(entry->address, address, 6) != 0) continue; 4817 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4818 // remove from controller if already present 4819 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4820 continue; 4821 } 4822 // direclty remove entry from whitelist 4823 btstack_linked_list_iterator_remove(&it); 4824 btstack_memory_whitelist_entry_free(entry); 4825 } 4826 } 4827 4828 /** 4829 * @brief Auto Connection Establishment - Stop Connecting to device 4830 * @param address_typ 4831 * @param address 4832 * @returns 0 if ok 4833 */ 4834 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4835 hci_remove_from_whitelist(address_type, address); 4836 hci_run(); 4837 return 0; 4838 } 4839 4840 /** 4841 * @brief Auto Connection Establishment - Stop everything 4842 * @note Convenience function to stop all active auto connection attempts 4843 */ 4844 void gap_auto_connection_stop_all(void){ 4845 btstack_linked_list_iterator_t it; 4846 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4847 while (btstack_linked_list_iterator_has_next(&it)){ 4848 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4849 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4850 // remove from controller if already present 4851 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4852 continue; 4853 } 4854 // directly remove entry from whitelist 4855 btstack_linked_list_iterator_remove(&it); 4856 btstack_memory_whitelist_entry_free(entry); 4857 } 4858 hci_run(); 4859 } 4860 4861 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4862 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4863 if (!conn) return 0; 4864 return conn->le_connection_interval; 4865 } 4866 #endif 4867 #endif 4868 4869 #ifdef ENABLE_CLASSIC 4870 /** 4871 * @brief Set Extended Inquiry Response data 4872 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4873 * @note has to be done before stack starts up 4874 */ 4875 void gap_set_extended_inquiry_response(const uint8_t * data){ 4876 hci_stack->eir_data = data; 4877 } 4878 4879 /** 4880 * @brief Start GAP Classic Inquiry 4881 * @param duration in 1.28s units 4882 * @return 0 if ok 4883 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4884 */ 4885 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4886 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4887 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4888 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4889 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4890 } 4891 hci_stack->inquiry_state = duration_in_1280ms_units; 4892 hci_run(); 4893 return 0; 4894 } 4895 4896 /** 4897 * @brief Stop GAP Classic Inquiry 4898 * @returns 0 if ok 4899 */ 4900 int gap_inquiry_stop(void){ 4901 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4902 // emit inquiry complete event, before it even started 4903 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4904 hci_emit_event(event, sizeof(event), 1); 4905 return 0; 4906 } 4907 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4908 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4909 hci_run(); 4910 return 0; 4911 } 4912 4913 4914 /** 4915 * @brief Remote Name Request 4916 * @param addr 4917 * @param page_scan_repetition_mode 4918 * @param clock_offset only used when bit 15 is set 4919 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4920 */ 4921 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4922 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4923 memcpy(hci_stack->remote_name_addr, addr, 6); 4924 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4925 hci_stack->remote_name_clock_offset = clock_offset; 4926 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4927 hci_run(); 4928 return 0; 4929 } 4930 4931 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4932 hci_stack->gap_pairing_state = state; 4933 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4934 hci_run(); 4935 return 0; 4936 } 4937 4938 /** 4939 * @brief Legacy Pairing Pin Code Response 4940 * @param addr 4941 * @param pin 4942 * @return 0 if ok 4943 */ 4944 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4945 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4946 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4947 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4948 } 4949 4950 /** 4951 * @brief Abort Legacy Pairing 4952 * @param addr 4953 * @param pin 4954 * @return 0 if ok 4955 */ 4956 int gap_pin_code_negative(bd_addr_t addr){ 4957 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4958 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4959 } 4960 4961 /** 4962 * @brief SSP Passkey Response 4963 * @param addr 4964 * @param passkey 4965 * @return 0 if ok 4966 */ 4967 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4968 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4969 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4970 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4971 } 4972 4973 /** 4974 * @brief Abort SSP Passkey Entry/Pairing 4975 * @param addr 4976 * @param pin 4977 * @return 0 if ok 4978 */ 4979 int gap_ssp_passkey_negative(bd_addr_t addr){ 4980 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4981 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4982 } 4983 4984 /** 4985 * @brief Accept SSP Numeric Comparison 4986 * @param addr 4987 * @param passkey 4988 * @return 0 if ok 4989 */ 4990 int gap_ssp_confirmation_response(bd_addr_t addr){ 4991 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4992 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4993 } 4994 4995 /** 4996 * @brief Abort SSP Numeric Comparison/Pairing 4997 * @param addr 4998 * @param pin 4999 * @return 0 if ok 5000 */ 5001 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5002 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5003 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5004 } 5005 5006 /** 5007 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5008 * @param inquiry_mode see bluetooth_defines.h 5009 */ 5010 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5011 hci_stack->inquiry_mode = mode; 5012 } 5013 5014 /** 5015 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5016 */ 5017 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5018 hci_stack->sco_voice_setting = voice_setting; 5019 } 5020 5021 /** 5022 * @brief Get SCO Voice Setting 5023 * @return current voice setting 5024 */ 5025 uint16_t hci_get_sco_voice_setting(void){ 5026 return hci_stack->sco_voice_setting; 5027 } 5028 5029 #ifdef ENABLE_CLASSIC 5030 static int hci_have_usb_transport(void){ 5031 if (!hci_stack->hci_transport) return 0; 5032 const char * transport_name = hci_stack->hci_transport->name; 5033 if (!transport_name) return 0; 5034 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5035 } 5036 #endif 5037 5038 /** @brief Get SCO packet length for current SCO Voice setting 5039 * @note Using SCO packets of the exact length is required for USB transfer 5040 * @return Length of SCO packets in bytes (not audio frames) 5041 */ 5042 int hci_get_sco_packet_length(void){ 5043 int sco_packet_length = 0; 5044 5045 #ifdef ENABLE_CLASSIC 5046 #ifdef ENABLE_SCO_OVER_HCI 5047 5048 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5049 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5050 5051 if (hci_have_usb_transport()){ 5052 // see Core Spec for H2 USB Transfer. 5053 // 3 byte SCO header + 24 bytes per connection 5054 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5055 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5056 } else { 5057 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5058 sco_packet_length = 3 + 60 * multiplier; 5059 // assert that it still fits inside an SCO buffer 5060 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5061 sco_packet_length = 3 + 60; 5062 } 5063 } 5064 #endif 5065 #endif 5066 return sco_packet_length; 5067 } 5068 5069 /** 5070 * @brief Sets the master/slave policy 5071 * @param policy (0: attempt to become master, 1: let connecting device decide) 5072 */ 5073 void hci_set_master_slave_policy(uint8_t policy){ 5074 hci_stack->master_slave_policy = policy; 5075 } 5076 5077 #endif 5078 5079 HCI_STATE hci_get_state(void){ 5080 return hci_stack->state; 5081 } 5082 5083 5084 /** 5085 * @brief Set callback for Bluetooth Hardware Error 5086 */ 5087 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5088 hci_stack->hardware_error_callback = fn; 5089 } 5090 5091 void hci_disconnect_all(void){ 5092 btstack_linked_list_iterator_t it; 5093 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5094 while (btstack_linked_list_iterator_has_next(&it)){ 5095 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5096 if (con->state == SENT_DISCONNECT) continue; 5097 con->state = SEND_DISCONNECT; 5098 } 5099 hci_run(); 5100 } 5101 5102 uint16_t hci_get_manufacturer(void){ 5103 return hci_stack->manufacturer; 5104 } 5105 5106 #ifdef ENABLE_BLE 5107 5108 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5109 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5110 if (!hci_con) return NULL; 5111 return &hci_con->sm_connection; 5112 } 5113 5114 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5115 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5116 5117 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5118 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5119 if (!sm_conn) return 0; // wrong connection 5120 if (!sm_conn->sm_connection_encrypted) return 0; 5121 return sm_conn->sm_actual_encryption_key_size; 5122 } 5123 5124 int gap_authenticated(hci_con_handle_t con_handle){ 5125 hci_connection_t * hci_connnection = hci_connection_for_handle(con_handle); 5126 if (hci_connnection == NULL) return 0; 5127 5128 switch (hci_connnection->address_type){ 5129 case BD_ADDR_TYPE_LE_PUBLIC: 5130 case BD_ADDR_TYPE_LE_RANDOM: 5131 if (hci_connnection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5132 return hci_connnection->sm_connection.sm_connection_authenticated; 5133 #ifdef ENABLE_CLASSIC 5134 case BD_ADDR_TYPE_SCO: 5135 case BD_ADDR_TYPE_CLASSIC: 5136 return gap_authenticated_for_link_key_type(hci_connnection->link_key_type); 5137 #endif 5138 default: 5139 return 0; 5140 } 5141 } 5142 5143 int gap_secure_connection(hci_con_handle_t con_handle){ 5144 hci_connection_t * hci_connnection = hci_connection_for_handle(con_handle); 5145 if (hci_connnection == NULL) return 0; 5146 5147 switch (hci_connnection->address_type){ 5148 case BD_ADDR_TYPE_LE_PUBLIC: 5149 case BD_ADDR_TYPE_LE_RANDOM: 5150 if (hci_connnection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5151 return hci_connnection->sm_connection.sm_connection_sc; 5152 #ifdef ENABLE_CLASSIC 5153 case BD_ADDR_TYPE_SCO: 5154 case BD_ADDR_TYPE_CLASSIC: 5155 return gap_secure_connection_for_link_key_type(hci_connnection->link_key_type); 5156 #endif 5157 default: 5158 return 0; 5159 } 5160 } 5161 5162 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5163 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5164 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5165 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5166 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5167 return sm_conn->sm_connection_authorization_state; 5168 } 5169 #endif 5170 5171 #ifdef ENABLE_CLASSIC 5172 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){ 5173 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5174 if (!conn) return GAP_CONNECTION_INVALID; 5175 conn->sniff_min_interval = sniff_min_interval; 5176 conn->sniff_max_interval = sniff_max_interval; 5177 conn->sniff_attempt = sniff_attempt; 5178 conn->sniff_timeout = sniff_timeout; 5179 hci_run(); 5180 return 0; 5181 } 5182 5183 /** 5184 * @brief Exit Sniff mode 5185 * @param con_handle 5186 @ @return 0 if ok 5187 */ 5188 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5189 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5190 if (!conn) return GAP_CONNECTION_INVALID; 5191 conn->sniff_min_interval = 0xffff; 5192 hci_run(); 5193 return 0; 5194 } 5195 #endif 5196 5197 void hci_halting_defer(void){ 5198 if (hci_stack->state != HCI_STATE_HALTING) return; 5199 switch (hci_stack->substate){ 5200 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5201 case HCI_HALTING_CLOSE: 5202 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5203 break; 5204 default: 5205 break; 5206 } 5207 } 5208