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