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