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 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 if (valid_cmd){ 1276 int size = 3 + hci_stack->hci_packet_buffer[2]; 1277 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1278 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1279 switch (valid_cmd) { 1280 case BTSTACK_CHIPSET_VALID_COMMAND: 1281 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1282 break; 1283 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1284 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1285 log_info("CSR Warm Boot"); 1286 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1287 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1288 btstack_run_loop_add_timer(&hci_stack->timeout); 1289 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1290 && hci_stack->config 1291 && hci_stack->chipset 1292 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1293 && hci_stack->hci_transport->set_baudrate 1294 && hci_transport_uart_get_main_baud_rate()){ 1295 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1296 } else { 1297 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1298 } 1299 break; 1300 default: 1301 // should not get here 1302 break; 1303 } 1304 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1305 break; 1306 } 1307 log_info("Init script done"); 1308 1309 // Init script download on Broadcom chipsets causes: 1310 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1311 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1312 1313 // - baud rate to reset, restore UART baud rate if needed 1314 int need_baud_change = hci_stack->config 1315 && hci_stack->chipset 1316 && hci_stack->chipset->set_baudrate_command 1317 && hci_stack->hci_transport->set_baudrate 1318 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1319 if (need_baud_change) { 1320 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1321 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1322 hci_stack->hci_transport->set_baudrate(baud_rate); 1323 } 1324 1325 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1326 // -> Work around: wait a few milliseconds here. 1327 log_info("BCM delay after init script"); 1328 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1329 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1330 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1331 btstack_run_loop_add_timer(&hci_stack->timeout); 1332 break; 1333 } 1334 } 1335 // otherwise continue 1336 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1337 hci_send_cmd(&hci_read_local_supported_commands); 1338 break; 1339 case HCI_INIT_SET_BD_ADDR: 1340 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1341 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1342 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1343 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1344 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1345 break; 1346 #endif 1347 1348 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1349 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1350 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1351 hci_send_cmd(&hci_read_local_supported_commands); 1352 break; 1353 case HCI_INIT_READ_BD_ADDR: 1354 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1355 hci_send_cmd(&hci_read_bd_addr); 1356 break; 1357 case HCI_INIT_READ_BUFFER_SIZE: 1358 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1359 hci_send_cmd(&hci_read_buffer_size); 1360 break; 1361 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1362 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1363 hci_send_cmd(&hci_read_local_supported_features); 1364 break; 1365 1366 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1367 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1368 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1369 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1370 break; 1371 case HCI_INIT_HOST_BUFFER_SIZE: 1372 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1373 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1374 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1375 break; 1376 #endif 1377 1378 case HCI_INIT_SET_EVENT_MASK: 1379 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1380 if (hci_le_supported()){ 1381 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1382 } else { 1383 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1384 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1385 } 1386 break; 1387 1388 #ifdef ENABLE_CLASSIC 1389 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1390 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1391 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1392 break; 1393 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1394 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1395 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1396 break; 1397 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1398 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1399 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1400 break; 1401 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1403 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1404 break; 1405 case HCI_INIT_WRITE_LOCAL_NAME: { 1406 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1407 hci_reserve_packet_buffer(); 1408 uint8_t * packet = hci_stack->hci_packet_buffer; 1409 // construct HCI Command and send 1410 uint16_t opcode = hci_write_local_name.opcode; 1411 hci_stack->last_cmd_opcode = opcode; 1412 packet[0] = opcode & 0xff; 1413 packet[1] = opcode >> 8; 1414 packet[2] = DEVICE_NAME_LEN; 1415 memset(&packet[3], 0, DEVICE_NAME_LEN); 1416 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1417 // expand '00:00:00:00:00:00' in name with bd_addr 1418 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1419 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1420 break; 1421 } 1422 case HCI_INIT_WRITE_EIR_DATA: { 1423 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1424 hci_reserve_packet_buffer(); 1425 uint8_t * packet = hci_stack->hci_packet_buffer; 1426 // construct HCI Command and send 1427 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1428 hci_stack->last_cmd_opcode = opcode; 1429 packet[0] = opcode & 0xff; 1430 packet[1] = opcode >> 8; 1431 packet[2] = 1 + 240; 1432 packet[3] = 0; // FEC not required 1433 if (hci_stack->eir_data){ 1434 memcpy(&packet[4], hci_stack->eir_data, 240); 1435 } else { 1436 memset(&packet[4], 0, 240); 1437 int name_len = strlen(hci_stack->local_name); 1438 packet[4] = name_len + 1; 1439 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1440 memcpy(&packet[6], hci_stack->local_name, name_len); 1441 } 1442 // expand '00:00:00:00:00:00' in name with bd_addr 1443 hci_replace_bd_addr_placeholder(&packet[4], 240); 1444 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1445 break; 1446 } 1447 case HCI_INIT_WRITE_INQUIRY_MODE: 1448 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1449 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1450 break; 1451 case HCI_INIT_WRITE_SCAN_ENABLE: 1452 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1453 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1454 break; 1455 // only sent if ENABLE_SCO_OVER_HCI is defined 1456 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1457 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1458 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1459 break; 1460 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1461 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1462 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1463 break; 1464 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1465 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1466 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1467 log_info("BCM: Route SCO data via HCI transport"); 1468 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1469 break; 1470 1471 #endif 1472 #ifdef ENABLE_BLE 1473 // LE INIT 1474 case HCI_INIT_LE_READ_BUFFER_SIZE: 1475 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1476 hci_send_cmd(&hci_le_read_buffer_size); 1477 break; 1478 case HCI_INIT_LE_SET_EVENT_MASK: 1479 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1480 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1481 break; 1482 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1483 // LE Supported Host = 1, Simultaneous Host = 0 1484 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1485 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1486 break; 1487 #endif 1488 1489 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1490 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1491 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1492 hci_send_cmd(&hci_le_read_maximum_data_length); 1493 break; 1494 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1495 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1496 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1497 break; 1498 #endif 1499 1500 #ifdef ENABLE_LE_CENTRAL 1501 case HCI_INIT_READ_WHITE_LIST_SIZE: 1502 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1503 hci_send_cmd(&hci_le_read_white_list_size); 1504 break; 1505 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1506 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1507 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1508 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1509 break; 1510 #endif 1511 default: 1512 return; 1513 } 1514 } 1515 1516 static void hci_init_done(void){ 1517 // done. tell the app 1518 log_info("hci_init_done -> HCI_STATE_WORKING"); 1519 hci_stack->state = HCI_STATE_WORKING; 1520 hci_emit_state(); 1521 hci_run(); 1522 } 1523 1524 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1525 1526 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1527 1528 uint8_t command_completed = 0; 1529 1530 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1531 uint16_t opcode = little_endian_read_16(packet,3); 1532 if (opcode == hci_stack->last_cmd_opcode){ 1533 command_completed = 1; 1534 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1535 } else { 1536 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1537 } 1538 } 1539 1540 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1541 uint8_t status = packet[2]; 1542 uint16_t opcode = little_endian_read_16(packet,4); 1543 if (opcode == hci_stack->last_cmd_opcode){ 1544 if (status){ 1545 command_completed = 1; 1546 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1547 } else { 1548 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1549 } 1550 } else { 1551 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1552 } 1553 } 1554 1555 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1556 1557 // Vendor == CSR 1558 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1559 // TODO: track actual command 1560 command_completed = 1; 1561 } 1562 1563 // Vendor == Toshiba 1564 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1565 // TODO: track actual command 1566 command_completed = 1; 1567 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1568 hci_stack->num_cmd_packets = 1; 1569 } 1570 1571 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1572 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1573 // 1574 // HCI Reset 1575 // Timeout 100 ms 1576 // HCI Reset 1577 // Command Complete Reset 1578 // HCI Read Local Version Information 1579 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1580 // hang... 1581 // 1582 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1583 if (!command_completed 1584 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1585 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1586 1587 uint16_t opcode = little_endian_read_16(packet,3); 1588 if (opcode == hci_reset.opcode){ 1589 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1590 return; 1591 } 1592 } 1593 1594 // CSR & H5 1595 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1596 if (!command_completed 1597 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1598 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1599 1600 uint16_t opcode = little_endian_read_16(packet,3); 1601 if (opcode == hci_reset.opcode){ 1602 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1603 return; 1604 } 1605 } 1606 1607 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1608 // fix: Correct substate and behave as command below 1609 if (command_completed){ 1610 switch (hci_stack->substate){ 1611 case HCI_INIT_SEND_RESET: 1612 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1613 break; 1614 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1615 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1616 break; 1617 default: 1618 break; 1619 } 1620 } 1621 1622 #endif 1623 1624 if (!command_completed) return; 1625 1626 int need_baud_change = 0; 1627 int need_addr_change = 0; 1628 1629 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1630 need_baud_change = hci_stack->config 1631 && hci_stack->chipset 1632 && hci_stack->chipset->set_baudrate_command 1633 && hci_stack->hci_transport->set_baudrate 1634 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1635 1636 need_addr_change = hci_stack->custom_bd_addr_set 1637 && hci_stack->chipset 1638 && hci_stack->chipset->set_bd_addr_command; 1639 #endif 1640 1641 switch(hci_stack->substate){ 1642 1643 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1644 case HCI_INIT_SEND_RESET: 1645 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1646 // fix: just correct substate and behave as command below 1647 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1648 btstack_run_loop_remove_timer(&hci_stack->timeout); 1649 break; 1650 case HCI_INIT_W4_SEND_RESET: 1651 btstack_run_loop_remove_timer(&hci_stack->timeout); 1652 break; 1653 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1654 log_info("Received local name, need baud change %d", need_baud_change); 1655 if (need_baud_change){ 1656 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1657 return; 1658 } 1659 // skip baud change 1660 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1661 return; 1662 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1663 // for STLC2500D, baud rate change already happened. 1664 // for others, baud rate gets changed now 1665 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1666 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1667 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1668 hci_stack->hci_transport->set_baudrate(baud_rate); 1669 } 1670 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1671 return; 1672 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1673 btstack_run_loop_remove_timer(&hci_stack->timeout); 1674 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1675 return; 1676 case HCI_INIT_W4_CUSTOM_INIT: 1677 // repeat custom init 1678 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1679 return; 1680 #else 1681 case HCI_INIT_W4_SEND_RESET: 1682 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1683 return ; 1684 #endif 1685 1686 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1687 if (need_baud_change && 1688 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1689 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1690 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1691 return; 1692 } 1693 if (need_addr_change){ 1694 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1695 return; 1696 } 1697 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1698 return; 1699 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1700 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1701 if (need_baud_change){ 1702 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1703 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1704 hci_stack->hci_transport->set_baudrate(baud_rate); 1705 } 1706 if (need_addr_change){ 1707 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1708 return; 1709 } 1710 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1711 return; 1712 case HCI_INIT_W4_SET_BD_ADDR: 1713 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1714 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1715 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1716 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1717 return; 1718 } 1719 // skipping st warm boot 1720 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1721 return; 1722 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1723 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1724 return; 1725 #endif 1726 case HCI_INIT_W4_READ_BD_ADDR: 1727 // only read buffer size if supported 1728 if (hci_stack->local_supported_commands[0] & 0x01) { 1729 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1730 return; 1731 } 1732 // skipping read buffer size 1733 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1734 return; 1735 case HCI_INIT_W4_SET_EVENT_MASK: 1736 // skip Classic init commands for LE only chipsets 1737 if (!hci_classic_supported()){ 1738 #ifdef ENABLE_BLE 1739 if (hci_le_supported()){ 1740 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1741 return; 1742 } 1743 #endif 1744 log_error("Neither BR/EDR nor LE supported"); 1745 hci_init_done(); 1746 return; 1747 } 1748 if (!gap_ssp_supported()){ 1749 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1750 return; 1751 } 1752 break; 1753 #ifdef ENABLE_BLE 1754 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1755 // skip write le host if not supported (e.g. on LE only EM9301) 1756 if (hci_stack->local_supported_commands[0] & 0x02) break; 1757 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1758 return; 1759 1760 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1761 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1762 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1763 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1764 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1765 return; 1766 } 1767 // explicit fall through to reduce repetitions 1768 1769 #ifdef ENABLE_LE_CENTRAL 1770 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1771 #else 1772 hci_init_done(); 1773 #endif 1774 return; 1775 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1776 1777 #endif /* ENABLE_BLE */ 1778 1779 #ifdef ENABLE_SCO_OVER_HCI 1780 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1781 // skip write synchronous flow control if not supported 1782 if (hci_stack->local_supported_commands[0] & 0x04) break; 1783 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1784 // explicit fall through to reduce repetitions 1785 1786 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1787 // skip write default erroneous data reporting if not supported 1788 if (hci_stack->local_supported_commands[0] & 0x08) break; 1789 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1790 // explicit fall through to reduce repetitions 1791 1792 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1793 // skip bcm set sco pcm config on non-Broadcom chipsets 1794 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1795 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1796 // explicit fall through to reduce repetitions 1797 1798 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1799 if (!hci_le_supported()){ 1800 // SKIP LE init for Classic only configuration 1801 hci_init_done(); 1802 return; 1803 } 1804 break; 1805 1806 #else /* !ENABLE_SCO_OVER_HCI */ 1807 1808 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1809 #ifdef ENABLE_BLE 1810 if (hci_le_supported()){ 1811 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1812 return; 1813 } 1814 #endif 1815 // SKIP LE init for Classic only configuration 1816 hci_init_done(); 1817 return; 1818 #endif /* ENABLE_SCO_OVER_HCI */ 1819 1820 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1821 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1822 // Response to command before init done state -> init done 1823 case (HCI_INIT_DONE-1): 1824 hci_init_done(); 1825 return; 1826 #endif 1827 1828 default: 1829 break; 1830 } 1831 hci_initializing_next_state(); 1832 } 1833 1834 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1835 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1836 bd_addr_t bd_address; 1837 memcpy(&bd_address, conn->address, 6); 1838 1839 #ifdef ENABLE_CLASSIC 1840 // cache needed data 1841 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1842 #endif 1843 1844 // connection failed, remove entry 1845 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1846 btstack_memory_hci_connection_free( conn ); 1847 1848 #ifdef ENABLE_CLASSIC 1849 // notify client if dedicated bonding 1850 if (notify_dedicated_bonding_failed){ 1851 log_info("hci notify_dedicated_bonding_failed"); 1852 hci_emit_dedicated_bonding_result(bd_address, status); 1853 } 1854 1855 // if authentication error, also delete link key 1856 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1857 gap_drop_link_key_for_bd_addr(bd_address); 1858 } 1859 #endif 1860 } 1861 1862 static void event_handler(uint8_t *packet, int size){ 1863 1864 uint16_t event_length = packet[1]; 1865 1866 // assert packet is complete 1867 if (size != event_length + 2){ 1868 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1869 return; 1870 } 1871 1872 bd_addr_t addr; 1873 bd_addr_type_t addr_type; 1874 hci_con_handle_t handle; 1875 hci_connection_t * conn; 1876 int i; 1877 int create_connection_cmd; 1878 1879 #ifdef ENABLE_CLASSIC 1880 uint8_t link_type; 1881 #endif 1882 1883 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1884 1885 switch (hci_event_packet_get_type(packet)) { 1886 1887 case HCI_EVENT_COMMAND_COMPLETE: 1888 // get num cmd packets - limit to 1 to reduce complexity 1889 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1890 1891 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1892 if (packet[5]) break; 1893 // terminate, name 248 chars 1894 packet[6+248] = 0; 1895 log_info("local name: %s", &packet[6]); 1896 } 1897 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1898 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1899 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1900 uint16_t acl_len = little_endian_read_16(packet, 6); 1901 uint16_t sco_len = packet[8]; 1902 1903 // determine usable ACL/SCO payload size 1904 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1905 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1906 1907 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1908 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1909 1910 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1911 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1912 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1913 } 1914 } 1915 #ifdef ENABLE_BLE 1916 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1917 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1918 hci_stack->le_acl_packets_total_num = packet[8]; 1919 // determine usable ACL payload size 1920 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1921 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1922 } 1923 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1924 } 1925 #endif 1926 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1927 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1928 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1929 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1930 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); 1931 } 1932 #endif 1933 #ifdef ENABLE_LE_CENTRAL 1934 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1935 hci_stack->le_whitelist_capacity = packet[6]; 1936 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1937 } 1938 #endif 1939 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1940 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1941 hci_stack->local_bd_addr); 1942 log_info("Local Address, Status: 0x%02x: Addr: %s", 1943 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1944 #ifdef ENABLE_CLASSIC 1945 if (hci_stack->link_key_db){ 1946 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1947 } 1948 #endif 1949 } 1950 #ifdef ENABLE_CLASSIC 1951 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1952 hci_emit_discoverable_enabled(hci_stack->discoverable); 1953 } 1954 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1955 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1956 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1957 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1958 hci_emit_event(event, sizeof(event), 1); 1959 } 1960 } 1961 #endif 1962 1963 // Note: HCI init checks 1964 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1965 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1966 1967 #ifdef ENABLE_CLASSIC 1968 // determine usable ACL packet types based on host buffer size and supported features 1969 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1970 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1971 #endif 1972 // Classic/LE 1973 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1974 } 1975 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1976 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1977 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1978 uint16_t manufacturer = little_endian_read_16(packet, 10); 1979 // map Cypress to Broadcom 1980 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 1981 log_info("Treat Cypress as Broadcom"); 1982 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 1983 little_endian_store_16(packet, 10, manufacturer); 1984 } 1985 hci_stack->manufacturer = manufacturer; 1986 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1987 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1988 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1989 } 1990 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1991 hci_stack->local_supported_commands[0] = 1992 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 1993 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 1994 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 1995 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 1996 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 1997 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 1998 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 1999 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2000 } 2001 #ifdef ENABLE_CLASSIC 2002 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2003 if (packet[5] == 0){ 2004 hci_stack->synchronous_flow_control_enabled = 1; 2005 } 2006 } 2007 #endif 2008 break; 2009 2010 case HCI_EVENT_COMMAND_STATUS: 2011 // get num cmd packets - limit to 1 to reduce complexity 2012 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2013 2014 // check command status to detected failed outgoing connections 2015 create_connection_cmd = 0; 2016 #ifdef ENABLE_CLASSIC 2017 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2018 create_connection_cmd = 1; 2019 } 2020 #endif 2021 #ifdef ENABLE_LE_CENTRAL 2022 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2023 create_connection_cmd = 1; 2024 } 2025 #endif 2026 if (create_connection_cmd) { 2027 uint8_t status = hci_event_command_status_get_status(packet); 2028 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2029 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); 2030 2031 // reset outgoing address info 2032 memset(hci_stack->outgoing_addr, 0, 6); 2033 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2034 2035 // error => outgoing connection failed 2036 if ((conn != NULL) && (status != 0)){ 2037 hci_handle_connection_failed(conn, status); 2038 } 2039 } 2040 break; 2041 2042 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2043 int offset = 3; 2044 for (i=0; i<packet[2];i++){ 2045 handle = little_endian_read_16(packet, offset) & 0x0fff; 2046 offset += 2; 2047 uint16_t num_packets = little_endian_read_16(packet, offset); 2048 offset += 2; 2049 2050 conn = hci_connection_for_handle(handle); 2051 if (!conn){ 2052 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2053 continue; 2054 } 2055 2056 if (conn->num_packets_sent >= num_packets){ 2057 conn->num_packets_sent -= num_packets; 2058 } else { 2059 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2060 conn->num_packets_sent = 0; 2061 } 2062 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2063 2064 #ifdef ENABLE_CLASSIC 2065 // For SCO, we do the can_send_now_check here 2066 hci_notify_if_sco_can_send_now(); 2067 #endif 2068 } 2069 break; 2070 } 2071 2072 #ifdef ENABLE_CLASSIC 2073 case HCI_EVENT_INQUIRY_COMPLETE: 2074 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2075 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2076 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2077 hci_emit_event(event, sizeof(event), 1); 2078 } 2079 break; 2080 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2081 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2082 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2083 } 2084 break; 2085 case HCI_EVENT_CONNECTION_REQUEST: 2086 reverse_bd_addr(&packet[2], addr); 2087 // TODO: eval COD 8-10 2088 link_type = packet[11]; 2089 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2090 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2091 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2092 if (!conn) { 2093 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2094 } 2095 if (!conn) { 2096 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2097 hci_stack->decline_reason = 0x0d; 2098 bd_addr_copy(hci_stack->decline_addr, addr); 2099 break; 2100 } 2101 conn->role = HCI_ROLE_SLAVE; 2102 conn->state = RECEIVED_CONNECTION_REQUEST; 2103 // store info about eSCO 2104 if (link_type == 0x02){ 2105 conn->remote_supported_feature_eSCO = 1; 2106 } 2107 hci_run(); 2108 break; 2109 2110 case HCI_EVENT_CONNECTION_COMPLETE: 2111 // Connection management 2112 reverse_bd_addr(&packet[5], addr); 2113 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2114 addr_type = BD_ADDR_TYPE_CLASSIC; 2115 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2116 if (conn) { 2117 if (!packet[2]){ 2118 conn->state = OPEN; 2119 conn->con_handle = little_endian_read_16(packet, 3); 2120 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2121 2122 // restart timer 2123 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2124 btstack_run_loop_add_timer(&conn->timeout); 2125 2126 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2127 2128 hci_emit_nr_connections_changed(); 2129 } else { 2130 // connection failed 2131 hci_handle_connection_failed(conn, packet[2]); 2132 } 2133 } 2134 break; 2135 2136 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2137 reverse_bd_addr(&packet[5], addr); 2138 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2139 if (packet[2]){ 2140 // connection failed 2141 break; 2142 } 2143 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2144 if (!conn) { 2145 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2146 } 2147 if (!conn) { 2148 break; 2149 } 2150 conn->state = OPEN; 2151 conn->con_handle = little_endian_read_16(packet, 3); 2152 2153 #ifdef ENABLE_SCO_OVER_HCI 2154 // update SCO 2155 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2156 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2157 } 2158 // trigger can send now 2159 if (hci_have_usb_transport()){ 2160 hci_stack->sco_can_send_now = 1; 2161 } 2162 #endif 2163 break; 2164 2165 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2166 handle = little_endian_read_16(packet, 3); 2167 conn = hci_connection_for_handle(handle); 2168 if (!conn) break; 2169 if (!packet[2]){ 2170 uint8_t * features = &packet[5]; 2171 if (features[6] & (1 << 3)){ 2172 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2173 } 2174 if (features[3] & (1<<7)){ 2175 conn->remote_supported_feature_eSCO = 1; 2176 } 2177 } 2178 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2179 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2180 if (conn->bonding_flags & BONDING_DEDICATED){ 2181 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2182 } 2183 break; 2184 2185 case HCI_EVENT_LINK_KEY_REQUEST: 2186 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2187 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2188 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2189 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2190 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2191 hci_run(); 2192 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2193 return; 2194 2195 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2196 reverse_bd_addr(&packet[2], addr); 2197 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2198 if (!conn) break; 2199 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2200 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2201 // Change Connection Encryption keeps link key type 2202 if (link_key_type != CHANGED_COMBINATION_KEY){ 2203 conn->link_key_type = link_key_type; 2204 } 2205 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2206 // still forward event to allow dismiss of pairing dialog 2207 break; 2208 } 2209 2210 case HCI_EVENT_PIN_CODE_REQUEST: 2211 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2212 // non-bondable mode: pin code negative reply will be sent 2213 if (!hci_stack->bondable){ 2214 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2215 hci_run(); 2216 return; 2217 } 2218 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2219 if (!hci_stack->link_key_db) break; 2220 hci_event_pin_code_request_get_bd_addr(packet, addr); 2221 hci_stack->link_key_db->delete_link_key(addr); 2222 break; 2223 2224 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2225 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2226 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2227 break; 2228 2229 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2230 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2231 if (!hci_stack->ssp_auto_accept) break; 2232 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2233 break; 2234 2235 case HCI_EVENT_USER_PASSKEY_REQUEST: 2236 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2237 if (!hci_stack->ssp_auto_accept) break; 2238 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2239 break; 2240 case HCI_EVENT_MODE_CHANGE: 2241 handle = hci_event_mode_change_get_handle(packet); 2242 conn = hci_connection_for_handle(handle); 2243 if (!conn) break; 2244 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2245 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2246 break; 2247 #endif 2248 2249 case HCI_EVENT_ENCRYPTION_CHANGE: 2250 handle = little_endian_read_16(packet, 3); 2251 conn = hci_connection_for_handle(handle); 2252 if (!conn) break; 2253 if (packet[2] == 0) { 2254 if (packet[5]){ 2255 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2256 } else { 2257 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2258 } 2259 } 2260 #ifdef ENABLE_CLASSIC 2261 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2262 #endif 2263 break; 2264 2265 #ifdef ENABLE_CLASSIC 2266 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2267 handle = little_endian_read_16(packet, 3); 2268 conn = hci_connection_for_handle(handle); 2269 if (!conn) break; 2270 2271 // dedicated bonding: send result and disconnect 2272 if (conn->bonding_flags & BONDING_DEDICATED){ 2273 conn->bonding_flags &= ~BONDING_DEDICATED; 2274 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2275 conn->bonding_status = packet[2]; 2276 break; 2277 } 2278 2279 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2280 // link key sufficient for requested security 2281 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2282 break; 2283 } 2284 // not enough 2285 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2286 break; 2287 #endif 2288 2289 // HCI_EVENT_DISCONNECTION_COMPLETE 2290 // has been split, to first notify stack before shutting connection down 2291 // see end of function, too. 2292 case HCI_EVENT_DISCONNECTION_COMPLETE: 2293 if (packet[2]) break; // status != 0 2294 handle = little_endian_read_16(packet, 3); 2295 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2296 if (hci_stack->acl_fragmentation_total_size > 0) { 2297 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2298 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2299 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2300 hci_stack->acl_fragmentation_total_size = 0; 2301 hci_stack->acl_fragmentation_pos = 0; 2302 if (release_buffer){ 2303 hci_release_packet_buffer(); 2304 } 2305 } 2306 } 2307 2308 // re-enable advertisements for le connections if active 2309 conn = hci_connection_for_handle(handle); 2310 if (!conn) break; 2311 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2312 #ifdef ENABLE_BLE 2313 #ifdef ENABLE_LE_PERIPHERAL 2314 if (hci_is_le_connection(conn)){ 2315 hci_reenable_advertisements_if_needed(); 2316 } 2317 #endif 2318 #endif 2319 break; 2320 2321 case HCI_EVENT_HARDWARE_ERROR: 2322 log_error("Hardware Error: 0x%02x", packet[2]); 2323 if (hci_stack->hardware_error_callback){ 2324 (*hci_stack->hardware_error_callback)(packet[2]); 2325 } else { 2326 // if no special requests, just reboot stack 2327 hci_power_control_off(); 2328 hci_power_control_on(); 2329 } 2330 break; 2331 2332 #ifdef ENABLE_CLASSIC 2333 case HCI_EVENT_ROLE_CHANGE: 2334 if (packet[2]) break; // status != 0 2335 reverse_bd_addr(&packet[3], addr); 2336 addr_type = BD_ADDR_TYPE_CLASSIC; 2337 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2338 if (!conn) break; 2339 conn->role = packet[9]; 2340 break; 2341 #endif 2342 2343 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2344 // release packet buffer only for asynchronous transport and if there are not further fragements 2345 if (hci_transport_synchronous()) { 2346 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2347 return; // instead of break: to avoid re-entering hci_run() 2348 } 2349 hci_stack->acl_fragmentation_tx_active = 0; 2350 if (hci_stack->acl_fragmentation_total_size) break; 2351 hci_release_packet_buffer(); 2352 2353 // L2CAP receives this event via the hci_emit_event below 2354 2355 #ifdef ENABLE_CLASSIC 2356 // For SCO, we do the can_send_now_check here 2357 hci_notify_if_sco_can_send_now(); 2358 #endif 2359 break; 2360 2361 #ifdef ENABLE_CLASSIC 2362 case HCI_EVENT_SCO_CAN_SEND_NOW: 2363 // For SCO, we do the can_send_now_check here 2364 hci_stack->sco_can_send_now = 1; 2365 hci_notify_if_sco_can_send_now(); 2366 return; 2367 2368 // explode inquriy results for easier consumption 2369 case HCI_EVENT_INQUIRY_RESULT: 2370 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2371 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2372 gap_inquiry_explode(packet); 2373 break; 2374 #endif 2375 2376 #ifdef ENABLE_BLE 2377 case HCI_EVENT_LE_META: 2378 switch (packet[2]){ 2379 #ifdef ENABLE_LE_CENTRAL 2380 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2381 // log_info("advertising report received"); 2382 if (!hci_stack->le_scanning_enabled) break; 2383 le_handle_advertisement_report(packet, size); 2384 break; 2385 #endif 2386 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2387 // Connection management 2388 reverse_bd_addr(&packet[8], addr); 2389 addr_type = (bd_addr_type_t)packet[7]; 2390 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2391 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2392 2393 #ifdef ENABLE_LE_CENTRAL 2394 // if auto-connect, remove from whitelist in both roles 2395 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2396 hci_remove_from_whitelist(addr_type, addr); 2397 } 2398 // handle error: error is reported only to the initiator -> outgoing connection 2399 if (packet[3]){ 2400 2401 // handle cancelled outgoing connection 2402 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2403 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2404 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2405 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2406 conn = gap_get_outgoing_connection(); 2407 } 2408 2409 // outgoing connection establishment is done 2410 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2411 // remove entry 2412 if (conn){ 2413 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2414 btstack_memory_hci_connection_free( conn ); 2415 } 2416 break; 2417 } 2418 #endif 2419 // on success, both hosts receive connection complete event 2420 if (packet[6] == HCI_ROLE_MASTER){ 2421 #ifdef ENABLE_LE_CENTRAL 2422 // if we're master, it was an outgoing connection and we're done with it 2423 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2424 #endif 2425 } else { 2426 #ifdef ENABLE_LE_PERIPHERAL 2427 // if we're slave, it was an incoming connection, advertisements have stopped 2428 hci_stack->le_advertisements_active = 0; 2429 #endif 2430 } 2431 // LE connections are auto-accepted, so just create a connection if there isn't one already 2432 if (!conn){ 2433 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2434 } 2435 // no memory, sorry. 2436 if (!conn){ 2437 break; 2438 } 2439 2440 conn->state = OPEN; 2441 conn->role = packet[6]; 2442 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2443 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2444 2445 #ifdef ENABLE_LE_PERIPHERAL 2446 if (packet[6] == HCI_ROLE_SLAVE){ 2447 hci_reenable_advertisements_if_needed(); 2448 } 2449 #endif 2450 2451 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2452 2453 // restart timer 2454 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2455 // btstack_run_loop_add_timer(&conn->timeout); 2456 2457 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2458 2459 hci_emit_nr_connections_changed(); 2460 break; 2461 2462 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2463 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2464 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2465 conn = hci_connection_for_handle(handle); 2466 if (!conn) break; 2467 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2468 break; 2469 2470 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2471 // connection 2472 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2473 conn = hci_connection_for_handle(handle); 2474 if (conn) { 2475 // read arguments 2476 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2477 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2478 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2479 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2480 2481 // validate against current connection parameter range 2482 le_connection_parameter_range_t existing_range; 2483 gap_get_connection_parameter_range(&existing_range); 2484 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2485 if (update_parameter){ 2486 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2487 conn->le_conn_interval_min = le_conn_interval_min; 2488 conn->le_conn_interval_max = le_conn_interval_max; 2489 conn->le_conn_latency = le_conn_latency; 2490 conn->le_supervision_timeout = le_supervision_timeout; 2491 } else { 2492 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2493 } 2494 } 2495 break; 2496 default: 2497 break; 2498 } 2499 break; 2500 #endif 2501 case HCI_EVENT_VENDOR_SPECIFIC: 2502 // Vendor specific commands often create vendor specific event instead of num completed packets 2503 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2504 switch (hci_stack->manufacturer){ 2505 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2506 hci_stack->num_cmd_packets = 1; 2507 break; 2508 default: 2509 break; 2510 } 2511 break; 2512 default: 2513 break; 2514 } 2515 2516 // handle BT initialization 2517 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2518 hci_initializing_event_handler(packet, size); 2519 } 2520 2521 // help with BT sleep 2522 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2523 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2524 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2525 hci_initializing_next_state(); 2526 } 2527 2528 // notify upper stack 2529 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2530 2531 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2532 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2533 if (!packet[2]){ 2534 handle = little_endian_read_16(packet, 3); 2535 hci_connection_t * aConn = hci_connection_for_handle(handle); 2536 if (aConn) { 2537 uint8_t status = aConn->bonding_status; 2538 uint16_t flags = aConn->bonding_flags; 2539 bd_addr_t bd_address; 2540 memcpy(&bd_address, aConn->address, 6); 2541 hci_shutdown_connection(aConn); 2542 // connection struct is gone, don't access anymore 2543 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2544 hci_emit_dedicated_bonding_result(bd_address, status); 2545 } 2546 } 2547 } 2548 } 2549 2550 // execute main loop 2551 hci_run(); 2552 } 2553 2554 #ifdef ENABLE_CLASSIC 2555 2556 #define SCO_TX_AFTER_RX_MS 5 2557 2558 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2559 static void sco_schedule_tx(hci_connection_t * conn); 2560 2561 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2562 log_info("SCO TX Timeout"); 2563 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2564 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2565 if (!conn) return; 2566 2567 // schedule next 2568 sco_schedule_tx(conn); 2569 conn->sco_tx_count++; 2570 2571 // trigger send 2572 conn->sco_tx_ready = 1; 2573 // extra packet if CVSD but SCO buffer is too short 2574 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && hci_stack->sco_data_packet_length < 123){ 2575 conn->sco_tx_ready++; 2576 } 2577 hci_notify_if_sco_can_send_now(); 2578 } 2579 2580 static void sco_schedule_tx(hci_connection_t * conn){ 2581 // find next time to send 2582 uint32_t now = btstack_run_loop_get_time_ms(); 2583 uint32_t tx_ms; 2584 int time_delta_ms; 2585 while (1){ 2586 // packet delay: count(rx) - count(tx) 2587 int packet_offset = (int8_t) (conn->sco_tx_count - conn->sco_rx_count); 2588 tx_ms = conn->sco_rx_ms + ((packet_offset * 15) >> 1) + SCO_TX_AFTER_RX_MS; 2589 time_delta_ms = (int) (tx_ms - now); 2590 if (time_delta_ms >= 3){ 2591 break; 2592 } 2593 // skip packet 2594 conn->sco_tx_count++; 2595 } 2596 // 2597 log_info("SCO TX at %u in %u", (int) tx_ms, time_delta_ms); 2598 btstack_run_loop_set_timer(&conn->timeout, time_delta_ms); 2599 btstack_run_loop_set_timer_context(&conn->timeout, (void *) (uintptr_t) conn->con_handle); 2600 btstack_run_loop_set_timer_handler(&conn->timeout, &sco_tx_timeout_handler); 2601 btstack_run_loop_add_timer(&conn->timeout); 2602 } 2603 2604 static void sco_handler(uint8_t * packet, uint16_t size){ 2605 // lookup connection struct 2606 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2607 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2608 if (!conn) return; 2609 2610 int notify_sco = 0; 2611 2612 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2613 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2614 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2615 packet[2] = 0x3c; 2616 memmove(&packet[3], &packet[23], 63); 2617 size = 63; 2618 } 2619 } 2620 2621 if (hci_have_usb_transport()){ 2622 // Nothing to do 2623 } else { 2624 // 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); 2625 if (hci_stack->synchronous_flow_control_enabled == 0){ 2626 uint32_t now = btstack_run_loop_get_time_ms(); 2627 if (conn->sco_rx_valid){ 2628 conn->sco_rx_count++; 2629 // expected arrival timme 2630 conn->sco_rx_ms += 7; 2631 int delta = (int32_t) (now - conn->sco_rx_ms); 2632 if (delta <= 0){ 2633 log_info("SCO NOW - EXP = %d, use +7 ms", delta); 2634 } else { 2635 conn->sco_rx_ms++; 2636 log_info("SCO NOW > EXP = %d, use +8 ms", delta); 2637 } 2638 } else { 2639 // use first timestamp as is 2640 conn->sco_rx_ms = now; 2641 conn->sco_rx_valid = 1; 2642 log_info("SCO first rx"); 2643 sco_schedule_tx(conn); 2644 } 2645 } 2646 } 2647 // deliver to app 2648 if (hci_stack->sco_packet_handler) { 2649 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2650 } 2651 2652 // notify app if it can send again 2653 if (notify_sco){ 2654 hci_notify_if_sco_can_send_now(); 2655 } 2656 2657 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2658 conn->num_packets_completed++; 2659 hci_stack->host_completed_packets = 1; 2660 hci_run(); 2661 #endif 2662 } 2663 #endif 2664 2665 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2666 hci_dump_packet(packet_type, 1, packet, size); 2667 switch (packet_type) { 2668 case HCI_EVENT_PACKET: 2669 event_handler(packet, size); 2670 break; 2671 case HCI_ACL_DATA_PACKET: 2672 acl_handler(packet, size); 2673 break; 2674 #ifdef ENABLE_CLASSIC 2675 case HCI_SCO_DATA_PACKET: 2676 sco_handler(packet, size); 2677 break; 2678 #endif 2679 default: 2680 break; 2681 } 2682 } 2683 2684 /** 2685 * @brief Add event packet handler. 2686 */ 2687 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2688 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2689 } 2690 2691 2692 /** Register HCI packet handlers */ 2693 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2694 hci_stack->acl_packet_handler = handler; 2695 } 2696 2697 #ifdef ENABLE_CLASSIC 2698 /** 2699 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2700 */ 2701 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2702 hci_stack->sco_packet_handler = handler; 2703 } 2704 #endif 2705 2706 static void hci_state_reset(void){ 2707 // no connections yet 2708 hci_stack->connections = NULL; 2709 2710 // keep discoverable/connectable as this has been requested by the client(s) 2711 // hci_stack->discoverable = 0; 2712 // hci_stack->connectable = 0; 2713 // hci_stack->bondable = 1; 2714 // hci_stack->own_addr_type = 0; 2715 2716 // buffer is free 2717 hci_stack->hci_packet_buffer_reserved = 0; 2718 2719 // no pending cmds 2720 hci_stack->decline_reason = 0; 2721 hci_stack->new_scan_enable_value = 0xff; 2722 2723 // LE 2724 #ifdef ENABLE_BLE 2725 memset(hci_stack->le_random_address, 0, 6); 2726 hci_stack->le_random_address_set = 0; 2727 #endif 2728 #ifdef ENABLE_LE_CENTRAL 2729 hci_stack->le_scanning_active = 0; 2730 hci_stack->le_scan_type = 0xff; 2731 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2732 hci_stack->le_whitelist = 0; 2733 hci_stack->le_whitelist_capacity = 0; 2734 #endif 2735 } 2736 2737 #ifdef ENABLE_CLASSIC 2738 /** 2739 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2740 */ 2741 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2742 // store and open remote device db 2743 hci_stack->link_key_db = link_key_db; 2744 if (hci_stack->link_key_db) { 2745 hci_stack->link_key_db->open(); 2746 } 2747 } 2748 #endif 2749 2750 void hci_init(const hci_transport_t *transport, const void *config){ 2751 2752 #ifdef HAVE_MALLOC 2753 if (!hci_stack) { 2754 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2755 } 2756 #else 2757 hci_stack = &hci_stack_static; 2758 #endif 2759 memset(hci_stack, 0, sizeof(hci_stack_t)); 2760 2761 // reference to use transport layer implementation 2762 hci_stack->hci_transport = transport; 2763 2764 // reference to used config 2765 hci_stack->config = config; 2766 2767 // setup pointer for outgoing packet buffer 2768 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2769 2770 // max acl payload size defined in config.h 2771 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2772 2773 // register packet handlers with transport 2774 transport->register_packet_handler(&packet_handler); 2775 2776 hci_stack->state = HCI_STATE_OFF; 2777 2778 // class of device 2779 hci_stack->class_of_device = 0x007a020c; // Smartphone 2780 2781 // bondable by default 2782 hci_stack->bondable = 1; 2783 2784 #ifdef ENABLE_CLASSIC 2785 // classic name 2786 hci_stack->local_name = default_classic_name; 2787 2788 // Master slave policy 2789 hci_stack->master_slave_policy = 1; 2790 #endif 2791 2792 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2793 hci_stack->ssp_enable = 1; 2794 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2795 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2796 hci_stack->ssp_auto_accept = 1; 2797 2798 // voice setting - signed 16 bit pcm data with CVSD over the air 2799 hci_stack->sco_voice_setting = 0x60; 2800 2801 #ifdef ENABLE_LE_CENTRAL 2802 // connection parameter to use for outgoing connections 2803 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2804 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2805 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2806 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2807 hci_stack->le_connection_latency = 4; // 4 2808 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2809 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2810 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2811 #endif 2812 2813 #ifdef ENABLE_LE_PERIPHERAL 2814 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2815 #endif 2816 2817 // connection parameter range used to answer connection parameter update requests in l2cap 2818 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2819 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2820 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2821 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2822 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2823 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2824 2825 hci_state_reset(); 2826 } 2827 2828 /** 2829 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2830 */ 2831 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2832 hci_stack->chipset = chipset_driver; 2833 2834 // reset chipset driver - init is also called on power_up 2835 if (hci_stack->chipset && hci_stack->chipset->init){ 2836 hci_stack->chipset->init(hci_stack->config); 2837 } 2838 } 2839 2840 /** 2841 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2842 */ 2843 void hci_set_control(const btstack_control_t *hardware_control){ 2844 // references to used control implementation 2845 hci_stack->control = hardware_control; 2846 // init with transport config 2847 hardware_control->init(hci_stack->config); 2848 } 2849 2850 void hci_close(void){ 2851 // close remote device db 2852 if (hci_stack->link_key_db) { 2853 hci_stack->link_key_db->close(); 2854 } 2855 2856 btstack_linked_list_iterator_t lit; 2857 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2858 while (btstack_linked_list_iterator_has_next(&lit)){ 2859 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2860 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2861 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2862 hci_shutdown_connection(connection); 2863 } 2864 2865 hci_power_control(HCI_POWER_OFF); 2866 2867 #ifdef HAVE_MALLOC 2868 free(hci_stack); 2869 #endif 2870 hci_stack = NULL; 2871 } 2872 2873 #ifdef ENABLE_CLASSIC 2874 void gap_set_class_of_device(uint32_t class_of_device){ 2875 hci_stack->class_of_device = class_of_device; 2876 } 2877 2878 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2879 hci_stack->default_link_policy_settings = default_link_policy_settings; 2880 } 2881 2882 void hci_disable_l2cap_timeout_check(void){ 2883 disable_l2cap_timeouts = 1; 2884 } 2885 #endif 2886 2887 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2888 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2889 void hci_set_bd_addr(bd_addr_t addr){ 2890 memcpy(hci_stack->custom_bd_addr, addr, 6); 2891 hci_stack->custom_bd_addr_set = 1; 2892 } 2893 #endif 2894 2895 // State-Module-Driver overview 2896 // state module low-level 2897 // HCI_STATE_OFF off close 2898 // HCI_STATE_INITIALIZING, on open 2899 // HCI_STATE_WORKING, on open 2900 // HCI_STATE_HALTING, on open 2901 // HCI_STATE_SLEEPING, off/sleep close 2902 // HCI_STATE_FALLING_ASLEEP on open 2903 2904 static int hci_power_control_on(void){ 2905 2906 // power on 2907 int err = 0; 2908 if (hci_stack->control && hci_stack->control->on){ 2909 err = (*hci_stack->control->on)(); 2910 } 2911 if (err){ 2912 log_error( "POWER_ON failed"); 2913 hci_emit_hci_open_failed(); 2914 return err; 2915 } 2916 2917 // int chipset driver 2918 if (hci_stack->chipset && hci_stack->chipset->init){ 2919 hci_stack->chipset->init(hci_stack->config); 2920 } 2921 2922 // init transport 2923 if (hci_stack->hci_transport->init){ 2924 hci_stack->hci_transport->init(hci_stack->config); 2925 } 2926 2927 // open transport 2928 err = hci_stack->hci_transport->open(); 2929 if (err){ 2930 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2931 if (hci_stack->control && hci_stack->control->off){ 2932 (*hci_stack->control->off)(); 2933 } 2934 hci_emit_hci_open_failed(); 2935 return err; 2936 } 2937 return 0; 2938 } 2939 2940 static void hci_power_control_off(void){ 2941 2942 log_info("hci_power_control_off"); 2943 2944 // close low-level device 2945 hci_stack->hci_transport->close(); 2946 2947 log_info("hci_power_control_off - hci_transport closed"); 2948 2949 // power off 2950 if (hci_stack->control && hci_stack->control->off){ 2951 (*hci_stack->control->off)(); 2952 } 2953 2954 log_info("hci_power_control_off - control closed"); 2955 2956 hci_stack->state = HCI_STATE_OFF; 2957 } 2958 2959 static void hci_power_control_sleep(void){ 2960 2961 log_info("hci_power_control_sleep"); 2962 2963 #if 0 2964 // don't close serial port during sleep 2965 2966 // close low-level device 2967 hci_stack->hci_transport->close(hci_stack->config); 2968 #endif 2969 2970 // sleep mode 2971 if (hci_stack->control && hci_stack->control->sleep){ 2972 (*hci_stack->control->sleep)(); 2973 } 2974 2975 hci_stack->state = HCI_STATE_SLEEPING; 2976 } 2977 2978 static int hci_power_control_wake(void){ 2979 2980 log_info("hci_power_control_wake"); 2981 2982 // wake on 2983 if (hci_stack->control && hci_stack->control->wake){ 2984 (*hci_stack->control->wake)(); 2985 } 2986 2987 #if 0 2988 // open low-level device 2989 int err = hci_stack->hci_transport->open(hci_stack->config); 2990 if (err){ 2991 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2992 if (hci_stack->control && hci_stack->control->off){ 2993 (*hci_stack->control->off)(); 2994 } 2995 hci_emit_hci_open_failed(); 2996 return err; 2997 } 2998 #endif 2999 3000 return 0; 3001 } 3002 3003 static void hci_power_transition_to_initializing(void){ 3004 // set up state machine 3005 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3006 hci_stack->hci_packet_buffer_reserved = 0; 3007 hci_stack->state = HCI_STATE_INITIALIZING; 3008 hci_stack->substate = HCI_INIT_SEND_RESET; 3009 } 3010 3011 int hci_power_control(HCI_POWER_MODE power_mode){ 3012 3013 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3014 3015 int err = 0; 3016 switch (hci_stack->state){ 3017 3018 case HCI_STATE_OFF: 3019 switch (power_mode){ 3020 case HCI_POWER_ON: 3021 err = hci_power_control_on(); 3022 if (err) { 3023 log_error("hci_power_control_on() error %d", err); 3024 return err; 3025 } 3026 hci_power_transition_to_initializing(); 3027 break; 3028 case HCI_POWER_OFF: 3029 // do nothing 3030 break; 3031 case HCI_POWER_SLEEP: 3032 // do nothing (with SLEEP == OFF) 3033 break; 3034 } 3035 break; 3036 3037 case HCI_STATE_INITIALIZING: 3038 switch (power_mode){ 3039 case HCI_POWER_ON: 3040 // do nothing 3041 break; 3042 case HCI_POWER_OFF: 3043 // no connections yet, just turn it off 3044 hci_power_control_off(); 3045 break; 3046 case HCI_POWER_SLEEP: 3047 // no connections yet, just turn it off 3048 hci_power_control_sleep(); 3049 break; 3050 } 3051 break; 3052 3053 case HCI_STATE_WORKING: 3054 switch (power_mode){ 3055 case HCI_POWER_ON: 3056 // do nothing 3057 break; 3058 case HCI_POWER_OFF: 3059 // see hci_run 3060 hci_stack->state = HCI_STATE_HALTING; 3061 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3062 break; 3063 case HCI_POWER_SLEEP: 3064 // see hci_run 3065 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3066 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3067 break; 3068 } 3069 break; 3070 3071 case HCI_STATE_HALTING: 3072 switch (power_mode){ 3073 case HCI_POWER_ON: 3074 hci_power_transition_to_initializing(); 3075 break; 3076 case HCI_POWER_OFF: 3077 // do nothing 3078 break; 3079 case HCI_POWER_SLEEP: 3080 // see hci_run 3081 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3082 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3083 break; 3084 } 3085 break; 3086 3087 case HCI_STATE_FALLING_ASLEEP: 3088 switch (power_mode){ 3089 case HCI_POWER_ON: 3090 3091 #ifdef HAVE_PLATFORM_IPHONE_OS 3092 // nothing to do, if H4 supports power management 3093 if (btstack_control_iphone_power_management_enabled()){ 3094 hci_stack->state = HCI_STATE_INITIALIZING; 3095 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3096 break; 3097 } 3098 #endif 3099 hci_power_transition_to_initializing(); 3100 break; 3101 case HCI_POWER_OFF: 3102 // see hci_run 3103 hci_stack->state = HCI_STATE_HALTING; 3104 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3105 break; 3106 case HCI_POWER_SLEEP: 3107 // do nothing 3108 break; 3109 } 3110 break; 3111 3112 case HCI_STATE_SLEEPING: 3113 switch (power_mode){ 3114 case HCI_POWER_ON: 3115 3116 #ifdef HAVE_PLATFORM_IPHONE_OS 3117 // nothing to do, if H4 supports power management 3118 if (btstack_control_iphone_power_management_enabled()){ 3119 hci_stack->state = HCI_STATE_INITIALIZING; 3120 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3121 hci_update_scan_enable(); 3122 break; 3123 } 3124 #endif 3125 err = hci_power_control_wake(); 3126 if (err) return err; 3127 hci_power_transition_to_initializing(); 3128 break; 3129 case HCI_POWER_OFF: 3130 hci_stack->state = HCI_STATE_HALTING; 3131 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3132 break; 3133 case HCI_POWER_SLEEP: 3134 // do nothing 3135 break; 3136 } 3137 break; 3138 } 3139 3140 // create internal event 3141 hci_emit_state(); 3142 3143 // trigger next/first action 3144 hci_run(); 3145 3146 return 0; 3147 } 3148 3149 3150 #ifdef ENABLE_CLASSIC 3151 3152 static void hci_update_scan_enable(void){ 3153 // 2 = page scan, 1 = inq scan 3154 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3155 hci_run(); 3156 } 3157 3158 void gap_discoverable_control(uint8_t enable){ 3159 if (enable) enable = 1; // normalize argument 3160 3161 if (hci_stack->discoverable == enable){ 3162 hci_emit_discoverable_enabled(hci_stack->discoverable); 3163 return; 3164 } 3165 3166 hci_stack->discoverable = enable; 3167 hci_update_scan_enable(); 3168 } 3169 3170 void gap_connectable_control(uint8_t enable){ 3171 if (enable) enable = 1; // normalize argument 3172 3173 // don't emit event 3174 if (hci_stack->connectable == enable) return; 3175 3176 hci_stack->connectable = enable; 3177 hci_update_scan_enable(); 3178 } 3179 #endif 3180 3181 void gap_local_bd_addr(bd_addr_t address_buffer){ 3182 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3183 } 3184 3185 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3186 static void hci_host_num_completed_packets(void){ 3187 3188 // create packet manually as arrays are not supported and num_commands should not get reduced 3189 hci_reserve_packet_buffer(); 3190 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3191 3192 uint16_t size = 0; 3193 uint16_t num_handles = 0; 3194 packet[size++] = 0x35; 3195 packet[size++] = 0x0c; 3196 size++; // skip param len 3197 size++; // skip num handles 3198 3199 // add { handle, packets } entries 3200 btstack_linked_item_t * it; 3201 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3202 hci_connection_t * connection = (hci_connection_t *) it; 3203 if (connection->num_packets_completed){ 3204 little_endian_store_16(packet, size, connection->con_handle); 3205 size += 2; 3206 little_endian_store_16(packet, size, connection->num_packets_completed); 3207 size += 2; 3208 // 3209 num_handles++; 3210 connection->num_packets_completed = 0; 3211 } 3212 } 3213 3214 packet[2] = size - 3; 3215 packet[3] = num_handles; 3216 3217 hci_stack->host_completed_packets = 0; 3218 3219 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3220 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3221 3222 // release packet buffer for synchronous transport implementations 3223 if (hci_transport_synchronous()){ 3224 hci_release_packet_buffer(); 3225 hci_emit_transport_packet_sent(); 3226 } 3227 } 3228 #endif 3229 3230 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3231 UNUSED(ds); 3232 hci_stack->substate = HCI_HALTING_CLOSE; 3233 // allow packet handlers to defer final shutdown 3234 hci_emit_state(); 3235 hci_run(); 3236 } 3237 3238 static void hci_run(void){ 3239 3240 // log_info("hci_run: entered"); 3241 btstack_linked_item_t * it; 3242 3243 // send continuation fragments first, as they block the prepared packet buffer 3244 if (hci_stack->acl_fragmentation_total_size > 0) { 3245 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3246 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3247 if (connection) { 3248 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3249 hci_send_acl_packet_fragments(connection); 3250 return; 3251 } 3252 } else { 3253 // connection gone -> discard further fragments 3254 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3255 hci_stack->acl_fragmentation_total_size = 0; 3256 hci_stack->acl_fragmentation_pos = 0; 3257 } 3258 } 3259 3260 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3261 // send host num completed packets next as they don't require num_cmd_packets > 0 3262 if (!hci_can_send_comand_packet_transport()) return; 3263 if (hci_stack->host_completed_packets){ 3264 hci_host_num_completed_packets(); 3265 return; 3266 } 3267 #endif 3268 3269 if (!hci_can_send_command_packet_now()) return; 3270 3271 // global/non-connection oriented commands 3272 3273 #ifdef ENABLE_CLASSIC 3274 // decline incoming connections 3275 if (hci_stack->decline_reason){ 3276 uint8_t reason = hci_stack->decline_reason; 3277 hci_stack->decline_reason = 0; 3278 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3279 return; 3280 } 3281 // send scan enable 3282 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3283 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3284 hci_stack->new_scan_enable_value = 0xff; 3285 return; 3286 } 3287 // start/stop inquiry 3288 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3289 uint8_t duration = hci_stack->inquiry_state; 3290 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3291 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3292 return; 3293 } 3294 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3295 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3296 hci_send_cmd(&hci_inquiry_cancel); 3297 return; 3298 } 3299 // remote name request 3300 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3301 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3302 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3303 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3304 return; 3305 } 3306 // pairing 3307 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3308 uint8_t state = hci_stack->gap_pairing_state; 3309 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3310 switch (state){ 3311 case GAP_PAIRING_STATE_SEND_PIN: 3312 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); 3313 break; 3314 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3315 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3316 break; 3317 case GAP_PAIRING_STATE_SEND_PASSKEY: 3318 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3319 break; 3320 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3321 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3322 break; 3323 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3324 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3325 break; 3326 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3327 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3328 break; 3329 default: 3330 break; 3331 } 3332 return; 3333 } 3334 #endif 3335 3336 #ifdef ENABLE_BLE 3337 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3338 if ((hci_stack->state == HCI_STATE_WORKING) 3339 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3340 3341 #ifdef ENABLE_LE_CENTRAL 3342 // handle le scan 3343 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3344 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3345 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3346 return; 3347 } 3348 if (hci_stack->le_scan_type != 0xff){ 3349 // defaults: active scanning, accept all advertisement packets 3350 int scan_type = hci_stack->le_scan_type; 3351 hci_stack->le_scan_type = 0xff; 3352 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); 3353 return; 3354 } 3355 #endif 3356 #ifdef ENABLE_LE_PERIPHERAL 3357 // le advertisement control 3358 if (hci_stack->le_advertisements_todo){ 3359 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3360 } 3361 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3362 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3363 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3364 return; 3365 } 3366 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3367 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3368 hci_send_cmd(&hci_le_set_advertising_parameters, 3369 hci_stack->le_advertisements_interval_min, 3370 hci_stack->le_advertisements_interval_max, 3371 hci_stack->le_advertisements_type, 3372 hci_stack->le_own_addr_type, 3373 hci_stack->le_advertisements_direct_address_type, 3374 hci_stack->le_advertisements_direct_address, 3375 hci_stack->le_advertisements_channel_map, 3376 hci_stack->le_advertisements_filter_policy); 3377 return; 3378 } 3379 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3380 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3381 uint8_t adv_data_clean[31]; 3382 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3383 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3384 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3385 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3386 return; 3387 } 3388 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3389 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3390 uint8_t scan_data_clean[31]; 3391 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3392 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3393 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3394 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3395 return; 3396 } 3397 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3398 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3399 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3400 return; 3401 } 3402 #endif 3403 3404 #ifdef ENABLE_LE_CENTRAL 3405 // 3406 // LE Whitelist Management 3407 // 3408 3409 // check if whitelist needs modification 3410 btstack_linked_list_iterator_t lit; 3411 int modification_pending = 0; 3412 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3413 while (btstack_linked_list_iterator_has_next(&lit)){ 3414 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3415 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3416 modification_pending = 1; 3417 break; 3418 } 3419 } 3420 3421 if (modification_pending){ 3422 // stop connnecting if modification pending 3423 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3424 hci_send_cmd(&hci_le_create_connection_cancel); 3425 return; 3426 } 3427 3428 // add/remove entries 3429 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3430 while (btstack_linked_list_iterator_has_next(&lit)){ 3431 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3432 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3433 entry->state = LE_WHITELIST_ON_CONTROLLER; 3434 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3435 return; 3436 3437 } 3438 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3439 bd_addr_t address; 3440 bd_addr_type_t address_type = entry->address_type; 3441 memcpy(address, entry->address, 6); 3442 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3443 btstack_memory_whitelist_entry_free(entry); 3444 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3445 return; 3446 } 3447 } 3448 } 3449 3450 // start connecting 3451 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3452 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3453 bd_addr_t null_addr; 3454 memset(null_addr, 0, 6); 3455 hci_send_cmd(&hci_le_create_connection, 3456 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3457 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3458 1, // use whitelist 3459 0, // peer address type 3460 null_addr, // peer bd addr 3461 hci_stack->le_own_addr_type, // our addr type: 3462 hci_stack->le_connection_interval_min, // conn interval min 3463 hci_stack->le_connection_interval_max, // conn interval max 3464 hci_stack->le_connection_latency, // conn latency 3465 hci_stack->le_supervision_timeout, // conn latency 3466 hci_stack->le_minimum_ce_length, // min ce length 3467 hci_stack->le_maximum_ce_length // max ce length 3468 ); 3469 return; 3470 } 3471 #endif 3472 } 3473 #endif 3474 3475 // send pending HCI commands 3476 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3477 hci_connection_t * connection = (hci_connection_t *) it; 3478 3479 switch(connection->state){ 3480 case SEND_CREATE_CONNECTION: 3481 switch(connection->address_type){ 3482 #ifdef ENABLE_CLASSIC 3483 case BD_ADDR_TYPE_CLASSIC: 3484 log_info("sending hci_create_connection"); 3485 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3486 break; 3487 #endif 3488 default: 3489 #ifdef ENABLE_BLE 3490 #ifdef ENABLE_LE_CENTRAL 3491 // track outgoing connection 3492 hci_stack->outgoing_addr_type = connection->address_type; 3493 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3494 log_info("sending hci_le_create_connection"); 3495 hci_send_cmd(&hci_le_create_connection, 3496 hci_stack->le_connection_scan_interval, // conn scan interval 3497 hci_stack->le_connection_scan_window, // conn scan windows 3498 0, // don't use whitelist 3499 connection->address_type, // peer address type 3500 connection->address, // peer bd addr 3501 hci_stack->le_own_addr_type, // our addr type: 3502 hci_stack->le_connection_interval_min, // conn interval min 3503 hci_stack->le_connection_interval_max, // conn interval max 3504 hci_stack->le_connection_latency, // conn latency 3505 hci_stack->le_supervision_timeout, // conn latency 3506 hci_stack->le_minimum_ce_length, // min ce length 3507 hci_stack->le_maximum_ce_length // max ce length 3508 ); 3509 connection->state = SENT_CREATE_CONNECTION; 3510 #endif 3511 #endif 3512 break; 3513 } 3514 return; 3515 3516 #ifdef ENABLE_CLASSIC 3517 case RECEIVED_CONNECTION_REQUEST: 3518 connection->role = HCI_ROLE_SLAVE; 3519 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3520 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3521 connection->state = ACCEPTED_CONNECTION_REQUEST; 3522 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3523 } 3524 return; 3525 #endif 3526 3527 #ifdef ENABLE_BLE 3528 #ifdef ENABLE_LE_CENTRAL 3529 case SEND_CANCEL_CONNECTION: 3530 connection->state = SENT_CANCEL_CONNECTION; 3531 hci_send_cmd(&hci_le_create_connection_cancel); 3532 return; 3533 #endif 3534 #endif 3535 case SEND_DISCONNECT: 3536 connection->state = SENT_DISCONNECT; 3537 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3538 return; 3539 3540 default: 3541 break; 3542 } 3543 3544 // no further commands if connection is about to get shut down 3545 if (connection->state == SENT_DISCONNECT) continue; 3546 3547 #ifdef ENABLE_CLASSIC 3548 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3549 log_info("responding to link key request"); 3550 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3551 link_key_t link_key; 3552 link_key_type_t link_key_type; 3553 if ( hci_stack->link_key_db 3554 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3555 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3556 connection->link_key_type = link_key_type; 3557 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3558 } else { 3559 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3560 } 3561 return; 3562 } 3563 3564 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3565 log_info("denying to pin request"); 3566 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3567 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3568 return; 3569 } 3570 3571 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3572 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3573 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3574 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3575 // tweak authentication requirements 3576 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3577 if (connection->bonding_flags & BONDING_DEDICATED){ 3578 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3579 } 3580 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3581 authreq |= 1; 3582 } 3583 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3584 } else { 3585 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3586 } 3587 return; 3588 } 3589 3590 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3591 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3592 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3593 return; 3594 } 3595 3596 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3597 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3598 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3599 return; 3600 } 3601 3602 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3603 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3604 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3605 return; 3606 } 3607 3608 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3609 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3610 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3611 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3612 return; 3613 } 3614 3615 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3616 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3617 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3618 return; 3619 } 3620 3621 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3622 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3623 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3624 return; 3625 } 3626 #endif 3627 3628 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3629 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3630 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3631 return; 3632 } 3633 3634 #ifdef ENABLE_CLASSIC 3635 uint16_t sniff_min_interval; 3636 switch (connection->sniff_min_interval){ 3637 case 0: 3638 break; 3639 case 0xffff: 3640 connection->sniff_min_interval = 0; 3641 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3642 return; 3643 default: 3644 sniff_min_interval = connection->sniff_min_interval; 3645 connection->sniff_min_interval = 0; 3646 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3647 return; 3648 } 3649 #endif 3650 3651 #ifdef ENABLE_BLE 3652 switch (connection->le_con_parameter_update_state){ 3653 // response to L2CAP CON PARAMETER UPDATE REQUEST 3654 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3655 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3656 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3657 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3658 0x0000, 0xffff); 3659 return; 3660 case CON_PARAMETER_UPDATE_REPLY: 3661 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3662 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3663 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3664 0x0000, 0xffff); 3665 return; 3666 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3667 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3668 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3669 return; 3670 default: 3671 break; 3672 } 3673 if (connection->le_phy_update_all_phys != 0xff){ 3674 uint8_t all_phys = connection->le_phy_update_all_phys; 3675 connection->le_phy_update_all_phys = 0xff; 3676 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); 3677 return; 3678 } 3679 #endif 3680 } 3681 3682 hci_connection_t * connection; 3683 switch (hci_stack->state){ 3684 case HCI_STATE_INITIALIZING: 3685 hci_initializing_run(); 3686 break; 3687 3688 case HCI_STATE_HALTING: 3689 3690 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3691 switch (hci_stack->substate){ 3692 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3693 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3694 3695 #ifdef ENABLE_BLE 3696 #ifdef ENABLE_LE_CENTRAL 3697 // free whitelist entries 3698 { 3699 btstack_linked_list_iterator_t lit; 3700 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3701 while (btstack_linked_list_iterator_has_next(&lit)){ 3702 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3703 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3704 btstack_memory_whitelist_entry_free(entry); 3705 } 3706 } 3707 #endif 3708 #endif 3709 // close all open connections 3710 connection = (hci_connection_t *) hci_stack->connections; 3711 if (connection){ 3712 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3713 if (!hci_can_send_command_packet_now()) return; 3714 3715 // check state 3716 if (connection->state == SENT_DISCONNECT) return; 3717 connection->state = SENT_DISCONNECT; 3718 3719 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3720 3721 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3722 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3723 3724 // ... which would be ignored anyway as we shutdown (free) the connection now 3725 hci_shutdown_connection(connection); 3726 3727 // finally, send the disconnect command 3728 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3729 return; 3730 } 3731 3732 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3733 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3734 log_info("HCI_STATE_HALTING: wait 50 ms"); 3735 hci_stack->substate = HCI_HALTING_W4_TIMER; 3736 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3737 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3738 btstack_run_loop_add_timer(&hci_stack->timeout); 3739 break; 3740 } 3741 3742 /* explicit fall-through */ 3743 3744 case HCI_HALTING_CLOSE: 3745 log_info("HCI_STATE_HALTING, calling off"); 3746 3747 // switch mode 3748 hci_power_control_off(); 3749 3750 log_info("HCI_STATE_HALTING, emitting state"); 3751 hci_emit_state(); 3752 log_info("HCI_STATE_HALTING, done"); 3753 break; 3754 3755 case HCI_HALTING_W4_TIMER: 3756 // keep waiting 3757 3758 break; 3759 default: 3760 break; 3761 } 3762 3763 break; 3764 3765 case HCI_STATE_FALLING_ASLEEP: 3766 switch(hci_stack->substate) { 3767 case HCI_FALLING_ASLEEP_DISCONNECT: 3768 log_info("HCI_STATE_FALLING_ASLEEP"); 3769 // close all open connections 3770 connection = (hci_connection_t *) hci_stack->connections; 3771 3772 #ifdef HAVE_PLATFORM_IPHONE_OS 3773 // don't close connections, if H4 supports power management 3774 if (btstack_control_iphone_power_management_enabled()){ 3775 connection = NULL; 3776 } 3777 #endif 3778 if (connection){ 3779 3780 // send disconnect 3781 if (!hci_can_send_command_packet_now()) return; 3782 3783 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3784 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3785 3786 // send disconnected event right away - causes higher layer connections to get closed, too. 3787 hci_shutdown_connection(connection); 3788 return; 3789 } 3790 3791 if (hci_classic_supported()){ 3792 // disable page and inquiry scan 3793 if (!hci_can_send_command_packet_now()) return; 3794 3795 log_info("HCI_STATE_HALTING, disabling inq scans"); 3796 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3797 3798 // continue in next sub state 3799 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3800 break; 3801 } 3802 // no break - fall through for ble-only chips 3803 3804 case HCI_FALLING_ASLEEP_COMPLETE: 3805 log_info("HCI_STATE_HALTING, calling sleep"); 3806 #ifdef HAVE_PLATFORM_IPHONE_OS 3807 // don't actually go to sleep, if H4 supports power management 3808 if (btstack_control_iphone_power_management_enabled()){ 3809 // SLEEP MODE reached 3810 hci_stack->state = HCI_STATE_SLEEPING; 3811 hci_emit_state(); 3812 break; 3813 } 3814 #endif 3815 // switch mode 3816 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3817 hci_emit_state(); 3818 break; 3819 3820 default: 3821 break; 3822 } 3823 break; 3824 3825 default: 3826 break; 3827 } 3828 } 3829 3830 int hci_send_cmd_packet(uint8_t *packet, int size){ 3831 // house-keeping 3832 3833 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3834 hci_stack->loopback_mode = packet[3]; 3835 } 3836 3837 #ifdef ENABLE_CLASSIC 3838 bd_addr_t addr; 3839 hci_connection_t * conn; 3840 3841 // create_connection? 3842 if (IS_COMMAND(packet, hci_create_connection)){ 3843 reverse_bd_addr(&packet[3], addr); 3844 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3845 3846 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3847 if (!conn){ 3848 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3849 if (!conn){ 3850 // notify client that alloc failed 3851 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3852 return -1; // packet not sent to controller 3853 } 3854 conn->state = SEND_CREATE_CONNECTION; 3855 } 3856 log_info("conn state %u", conn->state); 3857 switch (conn->state){ 3858 // if connection active exists 3859 case OPEN: 3860 // and OPEN, emit connection complete command 3861 hci_emit_connection_complete(addr, conn->con_handle, 0); 3862 return -1; // packet not sent to controller 3863 case SEND_CREATE_CONNECTION: 3864 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3865 break; 3866 default: 3867 // otherwise, just ignore as it is already in the open process 3868 return -1; // packet not sent to controller 3869 } 3870 conn->state = SENT_CREATE_CONNECTION; 3871 3872 // track outgoing connection 3873 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3874 memcpy(hci_stack->outgoing_addr, addr, 6); 3875 } 3876 3877 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3878 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3879 } 3880 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3881 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3882 } 3883 3884 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3885 if (hci_stack->link_key_db){ 3886 reverse_bd_addr(&packet[3], addr); 3887 hci_stack->link_key_db->delete_link_key(addr); 3888 } 3889 } 3890 3891 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3892 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3893 reverse_bd_addr(&packet[3], addr); 3894 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3895 if (conn){ 3896 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3897 } 3898 } 3899 3900 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3901 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3902 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3903 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3904 reverse_bd_addr(&packet[3], addr); 3905 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3906 if (conn){ 3907 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3908 } 3909 } 3910 3911 #ifdef ENABLE_SCO_OVER_HCI 3912 // setup_synchronous_connection? Voice setting at offset 22 3913 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3914 // TODO: compare to current setting if sco connection already active 3915 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3916 } 3917 // accept_synchronus_connection? Voice setting at offset 18 3918 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3919 // TODO: compare to current setting if sco connection already active 3920 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3921 } 3922 #endif 3923 #endif 3924 3925 #ifdef ENABLE_BLE 3926 #ifdef ENABLE_LE_PERIPHERAL 3927 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3928 hci_stack->le_random_address_set = 1; 3929 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3930 } 3931 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3932 hci_stack->le_advertisements_active = packet[3]; 3933 } 3934 #endif 3935 #ifdef ENABLE_LE_CENTRAL 3936 if (IS_COMMAND(packet, hci_le_create_connection)){ 3937 // white list used? 3938 uint8_t initiator_filter_policy = packet[7]; 3939 switch (initiator_filter_policy){ 3940 case 0: 3941 // whitelist not used 3942 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3943 break; 3944 case 1: 3945 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3946 break; 3947 default: 3948 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3949 break; 3950 } 3951 } 3952 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3953 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3954 } 3955 #endif 3956 #endif 3957 3958 hci_stack->num_cmd_packets--; 3959 3960 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3961 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3962 } 3963 3964 // disconnect because of security block 3965 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3966 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3967 if (!connection) return; 3968 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3969 } 3970 3971 3972 // Configure Secure Simple Pairing 3973 3974 #ifdef ENABLE_CLASSIC 3975 3976 // enable will enable SSP during init 3977 void gap_ssp_set_enable(int enable){ 3978 hci_stack->ssp_enable = enable; 3979 } 3980 3981 static int hci_local_ssp_activated(void){ 3982 return gap_ssp_supported() && hci_stack->ssp_enable; 3983 } 3984 3985 // if set, BTstack will respond to io capability request using authentication requirement 3986 void gap_ssp_set_io_capability(int io_capability){ 3987 hci_stack->ssp_io_capability = io_capability; 3988 } 3989 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3990 hci_stack->ssp_authentication_requirement = authentication_requirement; 3991 } 3992 3993 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3994 void gap_ssp_set_auto_accept(int auto_accept){ 3995 hci_stack->ssp_auto_accept = auto_accept; 3996 } 3997 #endif 3998 3999 // va_list part of hci_send_cmd 4000 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4001 if (!hci_can_send_command_packet_now()){ 4002 log_error("hci_send_cmd called but cannot send packet now"); 4003 return 0; 4004 } 4005 4006 // for HCI INITIALIZATION 4007 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4008 hci_stack->last_cmd_opcode = cmd->opcode; 4009 4010 hci_reserve_packet_buffer(); 4011 uint8_t * packet = hci_stack->hci_packet_buffer; 4012 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4013 int err = hci_send_cmd_packet(packet, size); 4014 4015 // release packet buffer for synchronous transport implementations 4016 if (hci_transport_synchronous()){ 4017 hci_release_packet_buffer(); 4018 hci_emit_transport_packet_sent(); 4019 } 4020 4021 return err; 4022 } 4023 4024 /** 4025 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4026 */ 4027 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4028 va_list argptr; 4029 va_start(argptr, cmd); 4030 int res = hci_send_cmd_va_arg(cmd, argptr); 4031 va_end(argptr); 4032 return res; 4033 } 4034 4035 // Create various non-HCI events. 4036 // TODO: generalize, use table similar to hci_create_command 4037 4038 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4039 // dump packet 4040 if (dump) { 4041 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4042 } 4043 4044 // dispatch to all event handlers 4045 btstack_linked_list_iterator_t it; 4046 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4047 while (btstack_linked_list_iterator_has_next(&it)){ 4048 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4049 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4050 } 4051 } 4052 4053 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4054 if (!hci_stack->acl_packet_handler) return; 4055 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4056 } 4057 4058 #ifdef ENABLE_CLASSIC 4059 static void hci_notify_if_sco_can_send_now(void){ 4060 // notify SCO sender if waiting 4061 if (!hci_stack->sco_waiting_for_can_send_now) return; 4062 if (hci_can_send_sco_packet_now()){ 4063 hci_stack->sco_waiting_for_can_send_now = 0; 4064 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4065 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4066 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4067 } 4068 } 4069 4070 // parsing end emitting has been merged to reduce code size 4071 static void gap_inquiry_explode(uint8_t * packet){ 4072 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4073 4074 uint8_t * eir_data; 4075 ad_context_t context; 4076 const uint8_t * name; 4077 uint8_t name_len; 4078 4079 int event_type = hci_event_packet_get_type(packet); 4080 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4081 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4082 4083 // event[1] is set at the end 4084 int i; 4085 for (i=0; i<num_responses;i++){ 4086 memset(event, 0, sizeof(event)); 4087 event[0] = GAP_EVENT_INQUIRY_RESULT; 4088 uint8_t event_size = 18; // if name is not set by EIR 4089 4090 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4091 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4092 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4093 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4094 4095 switch (event_type){ 4096 case HCI_EVENT_INQUIRY_RESULT: 4097 // 14,15,16,17 = 0, size 18 4098 break; 4099 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4100 event[14] = 1; 4101 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4102 // 16,17 = 0, size 18 4103 break; 4104 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4105 event[14] = 1; 4106 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4107 // for EIR packets, there is only one reponse in it 4108 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4109 name = NULL; 4110 // EIR data is 240 bytes in EIR event 4111 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4112 uint8_t data_type = ad_iterator_get_data_type(&context); 4113 uint8_t data_size = ad_iterator_get_data_len(&context); 4114 const uint8_t * data = ad_iterator_get_data(&context); 4115 // Prefer Complete Local Name over Shortend Local Name 4116 switch (data_type){ 4117 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4118 if (name) continue; 4119 /* explicit fall-through */ 4120 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4121 name = data; 4122 name_len = data_size; 4123 break; 4124 default: 4125 break; 4126 } 4127 } 4128 if (name){ 4129 event[16] = 1; 4130 // truncate name if needed 4131 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4132 event[17] = len; 4133 memcpy(&event[18], name, len); 4134 event_size += len; 4135 } 4136 break; 4137 } 4138 event[1] = event_size - 2; 4139 hci_emit_event(event, event_size, 1); 4140 } 4141 } 4142 #endif 4143 4144 void hci_emit_state(void){ 4145 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4146 uint8_t event[3]; 4147 event[0] = BTSTACK_EVENT_STATE; 4148 event[1] = sizeof(event) - 2; 4149 event[2] = hci_stack->state; 4150 hci_emit_event(event, sizeof(event), 1); 4151 } 4152 4153 #ifdef ENABLE_CLASSIC 4154 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4155 uint8_t event[13]; 4156 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4157 event[1] = sizeof(event) - 2; 4158 event[2] = status; 4159 little_endian_store_16(event, 3, con_handle); 4160 reverse_bd_addr(address, &event[5]); 4161 event[11] = 1; // ACL connection 4162 event[12] = 0; // encryption disabled 4163 hci_emit_event(event, sizeof(event), 1); 4164 } 4165 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4166 if (disable_l2cap_timeouts) return; 4167 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4168 uint8_t event[4]; 4169 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4170 event[1] = sizeof(event) - 2; 4171 little_endian_store_16(event, 2, conn->con_handle); 4172 hci_emit_event(event, sizeof(event), 1); 4173 } 4174 #endif 4175 4176 #ifdef ENABLE_BLE 4177 #ifdef ENABLE_LE_CENTRAL 4178 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4179 uint8_t event[21]; 4180 event[0] = HCI_EVENT_LE_META; 4181 event[1] = sizeof(event) - 2; 4182 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4183 event[3] = status; 4184 little_endian_store_16(event, 4, con_handle); 4185 event[6] = 0; // TODO: role 4186 event[7] = address_type; 4187 reverse_bd_addr(address, &event[8]); 4188 little_endian_store_16(event, 14, 0); // interval 4189 little_endian_store_16(event, 16, 0); // latency 4190 little_endian_store_16(event, 18, 0); // supervision timeout 4191 event[20] = 0; // master clock accuracy 4192 hci_emit_event(event, sizeof(event), 1); 4193 } 4194 #endif 4195 #endif 4196 4197 static void hci_emit_transport_packet_sent(void){ 4198 // notify upper stack that it might be possible to send again 4199 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4200 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4201 } 4202 4203 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4204 uint8_t event[6]; 4205 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4206 event[1] = sizeof(event) - 2; 4207 event[2] = 0; // status = OK 4208 little_endian_store_16(event, 3, con_handle); 4209 event[5] = reason; 4210 hci_emit_event(event, sizeof(event), 1); 4211 } 4212 4213 static void hci_emit_nr_connections_changed(void){ 4214 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4215 uint8_t event[3]; 4216 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4217 event[1] = sizeof(event) - 2; 4218 event[2] = nr_hci_connections(); 4219 hci_emit_event(event, sizeof(event), 1); 4220 } 4221 4222 static void hci_emit_hci_open_failed(void){ 4223 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4224 uint8_t event[2]; 4225 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4226 event[1] = sizeof(event) - 2; 4227 hci_emit_event(event, sizeof(event), 1); 4228 } 4229 4230 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4231 log_info("hci_emit_dedicated_bonding_result %u ", status); 4232 uint8_t event[9]; 4233 int pos = 0; 4234 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4235 event[pos++] = sizeof(event) - 2; 4236 event[pos++] = status; 4237 reverse_bd_addr(address, &event[pos]); 4238 hci_emit_event(event, sizeof(event), 1); 4239 } 4240 4241 4242 #ifdef ENABLE_CLASSIC 4243 4244 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4245 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4246 uint8_t event[5]; 4247 int pos = 0; 4248 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4249 event[pos++] = sizeof(event) - 2; 4250 little_endian_store_16(event, 2, con_handle); 4251 pos += 2; 4252 event[pos++] = level; 4253 hci_emit_event(event, sizeof(event), 1); 4254 } 4255 4256 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4257 if (!connection) return LEVEL_0; 4258 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4259 return gap_security_level_for_link_key_type(connection->link_key_type); 4260 } 4261 4262 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4263 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4264 uint8_t event[3]; 4265 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4266 event[1] = sizeof(event) - 2; 4267 event[2] = enabled; 4268 hci_emit_event(event, sizeof(event), 1); 4269 } 4270 4271 #ifdef ENABLE_CLASSIC 4272 // query if remote side supports eSCO 4273 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4274 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4275 if (!connection) return 0; 4276 return connection->remote_supported_feature_eSCO; 4277 } 4278 4279 // query if remote side supports SSP 4280 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4281 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4282 if (!connection) return 0; 4283 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4284 } 4285 4286 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4287 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4288 } 4289 #endif 4290 4291 // GAP API 4292 /** 4293 * @bbrief enable/disable bonding. default is enabled 4294 * @praram enabled 4295 */ 4296 void gap_set_bondable_mode(int enable){ 4297 hci_stack->bondable = enable ? 1 : 0; 4298 } 4299 /** 4300 * @brief Get bondable mode. 4301 * @return 1 if bondable 4302 */ 4303 int gap_get_bondable_mode(void){ 4304 return hci_stack->bondable; 4305 } 4306 4307 /** 4308 * @brief map link keys to security levels 4309 */ 4310 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4311 switch (link_key_type){ 4312 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4313 return LEVEL_4; 4314 case COMBINATION_KEY: 4315 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4316 return LEVEL_3; 4317 default: 4318 return LEVEL_2; 4319 } 4320 } 4321 4322 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4323 log_info("gap_mitm_protection_required_for_security_level %u", level); 4324 return level > LEVEL_2; 4325 } 4326 4327 /** 4328 * @brief get current security level 4329 */ 4330 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4331 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4332 if (!connection) return LEVEL_0; 4333 return gap_security_level_for_connection(connection); 4334 } 4335 4336 /** 4337 * @brief request connection to device to 4338 * @result GAP_AUTHENTICATION_RESULT 4339 */ 4340 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4341 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4342 if (!connection){ 4343 hci_emit_security_level(con_handle, LEVEL_0); 4344 return; 4345 } 4346 gap_security_level_t current_level = gap_security_level(con_handle); 4347 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4348 requested_level, connection->requested_security_level, current_level); 4349 4350 // assumption: earlier requested security higher than current level => security request is active 4351 if (current_level < connection->requested_security_level){ 4352 if (connection->requested_security_level < requested_level){ 4353 // increase requested level as new level is higher 4354 4355 // TODO: handle re-authentication when done 4356 4357 connection->requested_security_level = requested_level; 4358 } 4359 return; 4360 } 4361 4362 // no request active, notify if security sufficient 4363 if (requested_level <= current_level){ 4364 hci_emit_security_level(con_handle, current_level); 4365 return; 4366 } 4367 4368 // start pairing to increase security level 4369 connection->requested_security_level = requested_level; 4370 4371 #if 0 4372 // sending encryption request without a link key results in an error. 4373 // TODO: figure out how to use it properly 4374 4375 // would enabling ecnryption suffice (>= LEVEL_2)? 4376 if (hci_stack->link_key_db){ 4377 link_key_type_t link_key_type; 4378 link_key_t link_key; 4379 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4380 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4381 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4382 return; 4383 } 4384 } 4385 } 4386 #endif 4387 4388 // start to authenticate connection 4389 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4390 hci_run(); 4391 } 4392 4393 /** 4394 * @brief start dedicated bonding with device. disconnect after bonding 4395 * @param device 4396 * @param request MITM protection 4397 * @result GAP_DEDICATED_BONDING_COMPLETE 4398 */ 4399 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4400 4401 // create connection state machine 4402 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4403 4404 if (!connection){ 4405 return BTSTACK_MEMORY_ALLOC_FAILED; 4406 } 4407 4408 // delete linkn key 4409 gap_drop_link_key_for_bd_addr(device); 4410 4411 // configure LEVEL_2/3, dedicated bonding 4412 connection->state = SEND_CREATE_CONNECTION; 4413 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4414 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4415 connection->bonding_flags = BONDING_DEDICATED; 4416 4417 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4418 4419 // handle: connnection failure (connection complete != ok) 4420 // handle: authentication failure 4421 // handle: disconnect on done 4422 4423 hci_run(); 4424 4425 return 0; 4426 } 4427 #endif 4428 4429 void gap_set_local_name(const char * local_name){ 4430 hci_stack->local_name = local_name; 4431 } 4432 4433 4434 #ifdef ENABLE_BLE 4435 4436 #ifdef ENABLE_LE_CENTRAL 4437 void gap_start_scan(void){ 4438 hci_stack->le_scanning_enabled = 1; 4439 hci_run(); 4440 } 4441 4442 void gap_stop_scan(void){ 4443 hci_stack->le_scanning_enabled = 0; 4444 hci_run(); 4445 } 4446 4447 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4448 hci_stack->le_scan_type = scan_type; 4449 hci_stack->le_scan_interval = scan_interval; 4450 hci_stack->le_scan_window = scan_window; 4451 hci_run(); 4452 } 4453 4454 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4455 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4456 if (!conn){ 4457 log_info("gap_connect: no connection exists yet, creating context"); 4458 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4459 if (!conn){ 4460 // notify client that alloc failed 4461 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4462 log_info("gap_connect: failed to alloc hci_connection_t"); 4463 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4464 } 4465 conn->state = SEND_CREATE_CONNECTION; 4466 log_info("gap_connect: send create connection next"); 4467 hci_run(); 4468 return 0; 4469 } 4470 4471 if (!hci_is_le_connection(conn) || 4472 conn->state == SEND_CREATE_CONNECTION || 4473 conn->state == SENT_CREATE_CONNECTION) { 4474 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4475 log_error("gap_connect: classic connection or connect is already being created"); 4476 return GATT_CLIENT_IN_WRONG_STATE; 4477 } 4478 4479 log_info("gap_connect: context exists with state %u", conn->state); 4480 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4481 hci_run(); 4482 return 0; 4483 } 4484 4485 // @assumption: only a single outgoing LE Connection exists 4486 static hci_connection_t * gap_get_outgoing_connection(void){ 4487 btstack_linked_item_t *it; 4488 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4489 hci_connection_t * conn = (hci_connection_t *) it; 4490 if (!hci_is_le_connection(conn)) continue; 4491 switch (conn->state){ 4492 case SEND_CREATE_CONNECTION: 4493 case SENT_CREATE_CONNECTION: 4494 case SENT_CANCEL_CONNECTION: 4495 return conn; 4496 default: 4497 break; 4498 }; 4499 } 4500 return NULL; 4501 } 4502 4503 uint8_t gap_connect_cancel(void){ 4504 hci_connection_t * conn = gap_get_outgoing_connection(); 4505 if (!conn) return 0; 4506 switch (conn->state){ 4507 case SEND_CREATE_CONNECTION: 4508 // skip sending create connection and emit event instead 4509 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4510 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4511 btstack_memory_hci_connection_free( conn ); 4512 break; 4513 case SENT_CREATE_CONNECTION: 4514 // request to send cancel connection 4515 conn->state = SEND_CANCEL_CONNECTION; 4516 hci_run(); 4517 break; 4518 default: 4519 break; 4520 } 4521 return 0; 4522 } 4523 #endif 4524 4525 #ifdef ENABLE_LE_CENTRAL 4526 /** 4527 * @brief Set connection parameters for outgoing connections 4528 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4529 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4530 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4531 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4532 * @param conn_latency, default: 4 4533 * @param supervision_timeout (unit: 10ms), default: 720 ms 4534 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4535 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4536 */ 4537 4538 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4539 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4540 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4541 hci_stack->le_connection_scan_interval = conn_scan_interval; 4542 hci_stack->le_connection_scan_window = conn_scan_window; 4543 hci_stack->le_connection_interval_min = conn_interval_min; 4544 hci_stack->le_connection_interval_max = conn_interval_max; 4545 hci_stack->le_connection_latency = conn_latency; 4546 hci_stack->le_supervision_timeout = supervision_timeout; 4547 hci_stack->le_minimum_ce_length = min_ce_length; 4548 hci_stack->le_maximum_ce_length = max_ce_length; 4549 } 4550 #endif 4551 4552 /** 4553 * @brief Updates the connection parameters for a given LE connection 4554 * @param handle 4555 * @param conn_interval_min (unit: 1.25ms) 4556 * @param conn_interval_max (unit: 1.25ms) 4557 * @param conn_latency 4558 * @param supervision_timeout (unit: 10ms) 4559 * @returns 0 if ok 4560 */ 4561 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4562 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4563 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4564 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4565 connection->le_conn_interval_min = conn_interval_min; 4566 connection->le_conn_interval_max = conn_interval_max; 4567 connection->le_conn_latency = conn_latency; 4568 connection->le_supervision_timeout = supervision_timeout; 4569 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4570 hci_run(); 4571 return 0; 4572 } 4573 4574 /** 4575 * @brief Request an update of the connection parameter for a given LE connection 4576 * @param handle 4577 * @param conn_interval_min (unit: 1.25ms) 4578 * @param conn_interval_max (unit: 1.25ms) 4579 * @param conn_latency 4580 * @param supervision_timeout (unit: 10ms) 4581 * @returns 0 if ok 4582 */ 4583 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4584 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4585 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4586 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4587 connection->le_conn_interval_min = conn_interval_min; 4588 connection->le_conn_interval_max = conn_interval_max; 4589 connection->le_conn_latency = conn_latency; 4590 connection->le_supervision_timeout = supervision_timeout; 4591 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4592 hci_run(); 4593 return 0; 4594 } 4595 4596 #ifdef ENABLE_LE_PERIPHERAL 4597 4598 static void gap_advertisments_changed(void){ 4599 // disable advertisements before updating adv, scan data, or adv params 4600 if (hci_stack->le_advertisements_active){ 4601 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4602 } 4603 hci_run(); 4604 } 4605 4606 /** 4607 * @brief Set Advertisement Data 4608 * @param advertising_data_length 4609 * @param advertising_data (max 31 octets) 4610 * @note data is not copied, pointer has to stay valid 4611 */ 4612 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4613 hci_stack->le_advertisements_data_len = advertising_data_length; 4614 hci_stack->le_advertisements_data = advertising_data; 4615 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4616 gap_advertisments_changed(); 4617 } 4618 4619 /** 4620 * @brief Set Scan Response Data 4621 * @param advertising_data_length 4622 * @param advertising_data (max 31 octets) 4623 * @note data is not copied, pointer has to stay valid 4624 */ 4625 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4626 hci_stack->le_scan_response_data_len = scan_response_data_length; 4627 hci_stack->le_scan_response_data = scan_response_data; 4628 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4629 gap_advertisments_changed(); 4630 } 4631 4632 /** 4633 * @brief Set Advertisement Parameters 4634 * @param adv_int_min 4635 * @param adv_int_max 4636 * @param adv_type 4637 * @param direct_address_type 4638 * @param direct_address 4639 * @param channel_map 4640 * @param filter_policy 4641 * 4642 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4643 */ 4644 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4645 uint8_t direct_address_typ, bd_addr_t direct_address, 4646 uint8_t channel_map, uint8_t filter_policy) { 4647 4648 hci_stack->le_advertisements_interval_min = adv_int_min; 4649 hci_stack->le_advertisements_interval_max = adv_int_max; 4650 hci_stack->le_advertisements_type = adv_type; 4651 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4652 hci_stack->le_advertisements_channel_map = channel_map; 4653 hci_stack->le_advertisements_filter_policy = filter_policy; 4654 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4655 4656 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4657 gap_advertisments_changed(); 4658 } 4659 4660 /** 4661 * @brief Enable/Disable Advertisements 4662 * @param enabled 4663 */ 4664 void gap_advertisements_enable(int enabled){ 4665 hci_stack->le_advertisements_enabled = enabled; 4666 if (enabled && !hci_stack->le_advertisements_active){ 4667 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4668 } 4669 if (!enabled && hci_stack->le_advertisements_active){ 4670 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4671 } 4672 hci_run(); 4673 } 4674 4675 #endif 4676 4677 void hci_le_set_own_address_type(uint8_t own_address_type){ 4678 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4679 if (own_address_type == hci_stack->le_own_addr_type) return; 4680 hci_stack->le_own_addr_type = own_address_type; 4681 4682 #ifdef ENABLE_LE_PERIPHERAL 4683 // update advertisement parameters, too 4684 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4685 gap_advertisments_changed(); 4686 #endif 4687 #ifdef ENABLE_LE_CENTRAL 4688 // note: we don't update scan parameters or modify ongoing connection attempts 4689 #endif 4690 } 4691 4692 #endif 4693 4694 uint8_t gap_disconnect(hci_con_handle_t handle){ 4695 hci_connection_t * conn = hci_connection_for_handle(handle); 4696 if (!conn){ 4697 hci_emit_disconnection_complete(handle, 0); 4698 return 0; 4699 } 4700 // ignore if already disconnected 4701 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4702 return 0; 4703 } 4704 conn->state = SEND_DISCONNECT; 4705 hci_run(); 4706 return 0; 4707 } 4708 4709 /** 4710 * @brief Get connection type 4711 * @param con_handle 4712 * @result connection_type 4713 */ 4714 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4715 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4716 if (!conn) return GAP_CONNECTION_INVALID; 4717 switch (conn->address_type){ 4718 case BD_ADDR_TYPE_LE_PUBLIC: 4719 case BD_ADDR_TYPE_LE_RANDOM: 4720 return GAP_CONNECTION_LE; 4721 case BD_ADDR_TYPE_SCO: 4722 return GAP_CONNECTION_SCO; 4723 case BD_ADDR_TYPE_CLASSIC: 4724 return GAP_CONNECTION_ACL; 4725 default: 4726 return GAP_CONNECTION_INVALID; 4727 } 4728 } 4729 4730 #ifdef ENABLE_BLE 4731 4732 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){ 4733 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4734 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4735 4736 conn->le_phy_update_all_phys = all_phys; 4737 conn->le_phy_update_tx_phys = tx_phys; 4738 conn->le_phy_update_rx_phys = rx_phys; 4739 conn->le_phy_update_phy_options = phy_options; 4740 4741 hci_run(); 4742 4743 return 0; 4744 } 4745 4746 #ifdef ENABLE_LE_CENTRAL 4747 /** 4748 * @brief Auto Connection Establishment - Start Connecting to device 4749 * @param address_typ 4750 * @param address 4751 * @returns 0 if ok 4752 */ 4753 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4754 // check capacity 4755 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4756 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4757 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4758 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4759 entry->address_type = address_type; 4760 memcpy(entry->address, address, 6); 4761 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4762 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4763 hci_run(); 4764 return 0; 4765 } 4766 4767 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4768 btstack_linked_list_iterator_t it; 4769 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4770 while (btstack_linked_list_iterator_has_next(&it)){ 4771 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4772 if (entry->address_type != address_type) continue; 4773 if (memcmp(entry->address, address, 6) != 0) continue; 4774 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4775 // remove from controller if already present 4776 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4777 continue; 4778 } 4779 // direclty remove entry from whitelist 4780 btstack_linked_list_iterator_remove(&it); 4781 btstack_memory_whitelist_entry_free(entry); 4782 } 4783 } 4784 4785 /** 4786 * @brief Auto Connection Establishment - Stop Connecting to device 4787 * @param address_typ 4788 * @param address 4789 * @returns 0 if ok 4790 */ 4791 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4792 hci_remove_from_whitelist(address_type, address); 4793 hci_run(); 4794 return 0; 4795 } 4796 4797 /** 4798 * @brief Auto Connection Establishment - Stop everything 4799 * @note Convenience function to stop all active auto connection attempts 4800 */ 4801 void gap_auto_connection_stop_all(void){ 4802 btstack_linked_list_iterator_t it; 4803 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4804 while (btstack_linked_list_iterator_has_next(&it)){ 4805 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4806 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4807 // remove from controller if already present 4808 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4809 continue; 4810 } 4811 // directly remove entry from whitelist 4812 btstack_linked_list_iterator_remove(&it); 4813 btstack_memory_whitelist_entry_free(entry); 4814 } 4815 hci_run(); 4816 } 4817 4818 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4819 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4820 if (!conn) return 0; 4821 return conn->le_connection_interval; 4822 } 4823 #endif 4824 #endif 4825 4826 #ifdef ENABLE_CLASSIC 4827 /** 4828 * @brief Set Extended Inquiry Response data 4829 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4830 * @note has to be done before stack starts up 4831 */ 4832 void gap_set_extended_inquiry_response(const uint8_t * data){ 4833 hci_stack->eir_data = data; 4834 } 4835 4836 /** 4837 * @brief Start GAP Classic Inquiry 4838 * @param duration in 1.28s units 4839 * @return 0 if ok 4840 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4841 */ 4842 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4843 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4844 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4845 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4846 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4847 } 4848 hci_stack->inquiry_state = duration_in_1280ms_units; 4849 hci_run(); 4850 return 0; 4851 } 4852 4853 /** 4854 * @brief Stop GAP Classic Inquiry 4855 * @returns 0 if ok 4856 */ 4857 int gap_inquiry_stop(void){ 4858 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4859 // emit inquiry complete event, before it even started 4860 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4861 hci_emit_event(event, sizeof(event), 1); 4862 return 0; 4863 } 4864 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4865 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4866 hci_run(); 4867 return 0; 4868 } 4869 4870 4871 /** 4872 * @brief Remote Name Request 4873 * @param addr 4874 * @param page_scan_repetition_mode 4875 * @param clock_offset only used when bit 15 is set 4876 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4877 */ 4878 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4879 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4880 memcpy(hci_stack->remote_name_addr, addr, 6); 4881 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4882 hci_stack->remote_name_clock_offset = clock_offset; 4883 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4884 hci_run(); 4885 return 0; 4886 } 4887 4888 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4889 hci_stack->gap_pairing_state = state; 4890 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4891 hci_run(); 4892 return 0; 4893 } 4894 4895 /** 4896 * @brief Legacy Pairing Pin Code Response 4897 * @param addr 4898 * @param pin 4899 * @return 0 if ok 4900 */ 4901 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4902 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4903 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4904 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4905 } 4906 4907 /** 4908 * @brief Abort Legacy Pairing 4909 * @param addr 4910 * @param pin 4911 * @return 0 if ok 4912 */ 4913 int gap_pin_code_negative(bd_addr_t addr){ 4914 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4915 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4916 } 4917 4918 /** 4919 * @brief SSP Passkey Response 4920 * @param addr 4921 * @param passkey 4922 * @return 0 if ok 4923 */ 4924 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4925 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4926 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4927 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4928 } 4929 4930 /** 4931 * @brief Abort SSP Passkey Entry/Pairing 4932 * @param addr 4933 * @param pin 4934 * @return 0 if ok 4935 */ 4936 int gap_ssp_passkey_negative(bd_addr_t addr){ 4937 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4938 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4939 } 4940 4941 /** 4942 * @brief Accept SSP Numeric Comparison 4943 * @param addr 4944 * @param passkey 4945 * @return 0 if ok 4946 */ 4947 int gap_ssp_confirmation_response(bd_addr_t addr){ 4948 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4949 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4950 } 4951 4952 /** 4953 * @brief Abort SSP Numeric Comparison/Pairing 4954 * @param addr 4955 * @param pin 4956 * @return 0 if ok 4957 */ 4958 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4959 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4960 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4961 } 4962 4963 /** 4964 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4965 * @param inquiry_mode see bluetooth_defines.h 4966 */ 4967 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4968 hci_stack->inquiry_mode = mode; 4969 } 4970 4971 /** 4972 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4973 */ 4974 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4975 hci_stack->sco_voice_setting = voice_setting; 4976 } 4977 4978 /** 4979 * @brief Get SCO Voice Setting 4980 * @return current voice setting 4981 */ 4982 uint16_t hci_get_sco_voice_setting(void){ 4983 return hci_stack->sco_voice_setting; 4984 } 4985 4986 #ifdef ENABLE_CLASSIC 4987 static int hci_have_usb_transport(void){ 4988 if (!hci_stack->hci_transport) return 0; 4989 const char * transport_name = hci_stack->hci_transport->name; 4990 if (!transport_name) return 0; 4991 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 4992 } 4993 #endif 4994 4995 /** @brief Get SCO packet length for current SCO Voice setting 4996 * @note Using SCO packets of the exact length is required for USB transfer 4997 * @return Length of SCO packets in bytes (not audio frames) 4998 */ 4999 int hci_get_sco_packet_length(void){ 5000 int sco_packet_length = 0; 5001 5002 #ifdef ENABLE_CLASSIC 5003 #ifdef ENABLE_SCO_OVER_HCI 5004 5005 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5006 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5007 5008 if (hci_have_usb_transport()){ 5009 // see Core Spec for H2 USB Transfer. 5010 // 3 byte SCO header + 24 bytes per connection 5011 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5012 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5013 } else { 5014 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5015 sco_packet_length = 3 + 60 * multiplier; 5016 // assert that it still fits inside an SCO buffer 5017 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5018 sco_packet_length = 3 + 60; 5019 } 5020 } 5021 #endif 5022 #endif 5023 return sco_packet_length; 5024 } 5025 5026 /** 5027 * @brief Sets the master/slave policy 5028 * @param policy (0: attempt to become master, 1: let connecting device decide) 5029 */ 5030 void hci_set_master_slave_policy(uint8_t policy){ 5031 hci_stack->master_slave_policy = policy; 5032 } 5033 5034 #endif 5035 5036 HCI_STATE hci_get_state(void){ 5037 return hci_stack->state; 5038 } 5039 5040 5041 /** 5042 * @brief Set callback for Bluetooth Hardware Error 5043 */ 5044 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5045 hci_stack->hardware_error_callback = fn; 5046 } 5047 5048 void hci_disconnect_all(void){ 5049 btstack_linked_list_iterator_t it; 5050 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5051 while (btstack_linked_list_iterator_has_next(&it)){ 5052 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5053 if (con->state == SENT_DISCONNECT) continue; 5054 con->state = SEND_DISCONNECT; 5055 } 5056 hci_run(); 5057 } 5058 5059 uint16_t hci_get_manufacturer(void){ 5060 return hci_stack->manufacturer; 5061 } 5062 5063 #ifdef ENABLE_BLE 5064 5065 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5066 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5067 if (!hci_con) return NULL; 5068 return &hci_con->sm_connection; 5069 } 5070 5071 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5072 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5073 5074 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5075 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5076 if (!sm_conn) return 0; // wrong connection 5077 if (!sm_conn->sm_connection_encrypted) return 0; 5078 return sm_conn->sm_actual_encryption_key_size; 5079 } 5080 5081 int gap_authenticated(hci_con_handle_t con_handle){ 5082 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5083 if (!sm_conn) return 0; // wrong connection 5084 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 5085 return sm_conn->sm_connection_authenticated; 5086 } 5087 5088 int gap_secure_connection(hci_con_handle_t con_handle){ 5089 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5090 if (!sm_conn) return 0; // wrong connection 5091 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 5092 return sm_conn->sm_connection_sc; 5093 } 5094 5095 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5096 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5097 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5098 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5099 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5100 return sm_conn->sm_connection_authorization_state; 5101 } 5102 #endif 5103 5104 #ifdef ENABLE_CLASSIC 5105 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){ 5106 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5107 if (!conn) return GAP_CONNECTION_INVALID; 5108 conn->sniff_min_interval = sniff_min_interval; 5109 conn->sniff_max_interval = sniff_max_interval; 5110 conn->sniff_attempt = sniff_attempt; 5111 conn->sniff_timeout = sniff_timeout; 5112 hci_run(); 5113 return 0; 5114 } 5115 5116 /** 5117 * @brief Exit Sniff mode 5118 * @param con_handle 5119 @ @return 0 if ok 5120 */ 5121 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5122 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5123 if (!conn) return GAP_CONNECTION_INVALID; 5124 conn->sniff_min_interval = 0xffff; 5125 hci_run(); 5126 return 0; 5127 } 5128 #endif 5129 5130 void hci_halting_defer(void){ 5131 if (hci_stack->state != HCI_STATE_HALTING) return; 5132 switch (hci_stack->substate){ 5133 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5134 case HCI_HALTING_CLOSE: 5135 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5136 break; 5137 default: 5138 break; 5139 } 5140 } 5141