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