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_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 147 static void hci_emit_nr_connections_changed(void); 148 static void hci_emit_hci_open_failed(void); 149 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 150 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 151 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 152 static void hci_run(void); 153 static int hci_is_le_connection(hci_connection_t * connection); 154 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 155 156 #ifdef ENABLE_BLE 157 #ifdef ENABLE_LE_CENTRAL 158 // called from test/ble_client/advertising_data_parser.c 159 void le_handle_advertisement_report(uint8_t *packet, int size); 160 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 161 #endif 162 #endif 163 164 // the STACK is here 165 #ifndef HAVE_MALLOC 166 static hci_stack_t hci_stack_static; 167 #endif 168 static hci_stack_t * hci_stack = NULL; 169 170 #ifdef ENABLE_CLASSIC 171 // test helper 172 static uint8_t disable_l2cap_timeouts = 0; 173 #endif 174 175 /** 176 * create connection for given address 177 * 178 * @return connection OR NULL, if no memory left 179 */ 180 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 181 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 182 hci_connection_t * conn = btstack_memory_hci_connection_get(); 183 if (!conn) return NULL; 184 memset(conn, 0, sizeof(hci_connection_t)); 185 bd_addr_copy(conn->address, addr); 186 conn->address_type = addr_type; 187 conn->con_handle = 0xffff; 188 conn->authentication_flags = AUTH_FLAGS_NONE; 189 conn->bonding_flags = 0; 190 conn->requested_security_level = LEVEL_0; 191 #ifdef ENABLE_CLASSIC 192 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 193 btstack_run_loop_set_timer_context(&conn->timeout, conn); 194 hci_connection_timestamp(conn); 195 #endif 196 conn->acl_recombination_length = 0; 197 conn->acl_recombination_pos = 0; 198 conn->num_acl_packets_sent = 0; 199 conn->num_sco_packets_sent = 0; 200 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 201 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 202 return conn; 203 } 204 205 206 /** 207 * get le connection parameter range 208 * 209 * @return le connection parameter range struct 210 */ 211 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 212 *range = hci_stack->le_connection_parameter_range; 213 } 214 215 /** 216 * set le connection parameter range 217 * 218 */ 219 220 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 221 hci_stack->le_connection_parameter_range = *range; 222 } 223 224 /** 225 * get hci connections iterator 226 * 227 * @return hci connections iterator 228 */ 229 230 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 231 btstack_linked_list_iterator_init(it, &hci_stack->connections); 232 } 233 234 /** 235 * get connection for a given handle 236 * 237 * @return connection OR NULL, if not found 238 */ 239 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 240 btstack_linked_list_iterator_t it; 241 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 242 while (btstack_linked_list_iterator_has_next(&it)){ 243 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 244 if ( item->con_handle == con_handle ) { 245 return item; 246 } 247 } 248 return NULL; 249 } 250 251 /** 252 * get connection for given address 253 * 254 * @return connection OR NULL, if not found 255 */ 256 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 257 btstack_linked_list_iterator_t it; 258 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 259 while (btstack_linked_list_iterator_has_next(&it)){ 260 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 261 if (connection->address_type != addr_type) continue; 262 if (memcmp(addr, connection->address, 6) != 0) continue; 263 return connection; 264 } 265 return NULL; 266 } 267 268 269 #ifdef ENABLE_CLASSIC 270 271 #ifdef ENABLE_SCO_OVER_HCI 272 static int hci_number_sco_connections(void){ 273 int connections = 0; 274 btstack_linked_list_iterator_t it; 275 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 276 while (btstack_linked_list_iterator_has_next(&it)){ 277 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 278 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 279 connections++; 280 } 281 return connections; 282 } 283 #endif 284 285 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 286 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 287 #ifdef HAVE_EMBEDDED_TICK 288 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 289 // connections might be timed out 290 hci_emit_l2cap_check_timeout(connection); 291 } 292 #else 293 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 294 // connections might be timed out 295 hci_emit_l2cap_check_timeout(connection); 296 } 297 #endif 298 } 299 300 static void hci_connection_timestamp(hci_connection_t *connection){ 301 #ifdef HAVE_EMBEDDED_TICK 302 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 303 #else 304 connection->timestamp = btstack_run_loop_get_time_ms(); 305 #endif 306 } 307 308 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 309 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 310 } 311 312 313 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 314 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 315 } 316 317 /** 318 * add authentication flags and reset timer 319 * @note: assumes classic connection 320 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 321 */ 322 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 323 bd_addr_t addr; 324 reverse_bd_addr(bd_addr, addr); 325 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 326 if (conn) { 327 connectionSetAuthenticationFlags(conn, flags); 328 hci_connection_timestamp(conn); 329 } 330 } 331 332 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 333 hci_connection_t * conn = hci_connection_for_handle(handle); 334 if (!conn) return 0; 335 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 336 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 337 return 0; 338 } 339 340 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 341 if (!hci_stack->link_key_db) return; 342 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 343 hci_stack->link_key_db->delete_link_key(addr); 344 } 345 346 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 347 if (!hci_stack->link_key_db) return; 348 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 349 hci_stack->link_key_db->put_link_key(addr, link_key, type); 350 } 351 #endif 352 353 static int hci_is_le_connection(hci_connection_t * connection){ 354 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 355 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 356 } 357 358 /** 359 * count connections 360 */ 361 static int nr_hci_connections(void){ 362 int count = 0; 363 btstack_linked_item_t *it; 364 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 365 return count; 366 } 367 368 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 369 370 unsigned int num_packets_sent_classic = 0; 371 unsigned int num_packets_sent_le = 0; 372 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 377 num_packets_sent_classic += connection->num_acl_packets_sent; 378 } else { 379 num_packets_sent_le += connection->num_acl_packets_sent; 380 } 381 } 382 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 383 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 384 int free_slots_le = 0; 385 386 if (free_slots_classic < 0){ 387 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); 388 return 0; 389 } 390 391 if (hci_stack->le_acl_packets_total_num){ 392 // if we have LE slots, they are used 393 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 394 if (free_slots_le < 0){ 395 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); 396 return 0; 397 } 398 } else { 399 // otherwise, classic slots are used for LE, too 400 free_slots_classic -= num_packets_sent_le; 401 if (free_slots_classic < 0){ 402 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); 403 return 0; 404 } 405 } 406 407 switch (address_type){ 408 case BD_ADDR_TYPE_UNKNOWN: 409 log_error("hci_number_free_acl_slots: unknown address type"); 410 return 0; 411 412 case BD_ADDR_TYPE_CLASSIC: 413 return free_slots_classic; 414 415 default: 416 if (hci_stack->le_acl_packets_total_num){ 417 return free_slots_le; 418 } 419 return free_slots_classic; 420 } 421 } 422 423 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 424 // get connection type 425 hci_connection_t * connection = hci_connection_for_handle(con_handle); 426 if (!connection){ 427 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 428 return 0; 429 } 430 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 431 } 432 433 #ifdef ENABLE_CLASSIC 434 static int hci_number_free_sco_slots(void){ 435 unsigned int num_sco_packets_sent = 0; 436 btstack_linked_item_t *it; 437 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 438 hci_connection_t * connection = (hci_connection_t *) it; 439 num_sco_packets_sent += connection->num_sco_packets_sent; 440 } 441 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 442 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 443 return 0; 444 } 445 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 446 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 447 } 448 #endif 449 450 // only used to send HCI Host Number Completed Packets 451 static int hci_can_send_comand_packet_transport(void){ 452 if (hci_stack->hci_packet_buffer_reserved) return 0; 453 454 // check for async hci transport implementations 455 if (hci_stack->hci_transport->can_send_packet_now){ 456 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 457 return 0; 458 } 459 } 460 return 1; 461 } 462 463 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 464 int hci_can_send_command_packet_now(void){ 465 if (hci_can_send_comand_packet_transport() == 0) return 0; 466 return hci_stack->num_cmd_packets > 0; 467 } 468 469 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 470 // check for async hci transport implementations 471 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 472 return hci_stack->hci_transport->can_send_packet_now(packet_type); 473 } 474 475 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 476 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 477 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 478 } 479 480 int hci_can_send_acl_le_packet_now(void){ 481 if (hci_stack->hci_packet_buffer_reserved) return 0; 482 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 483 } 484 485 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 486 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 487 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 488 } 489 490 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 491 if (hci_stack->hci_packet_buffer_reserved) return 0; 492 return hci_can_send_prepared_acl_packet_now(con_handle); 493 } 494 495 #ifdef ENABLE_CLASSIC 496 int hci_can_send_acl_classic_packet_now(void){ 497 if (hci_stack->hci_packet_buffer_reserved) return 0; 498 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 499 } 500 501 int hci_can_send_prepared_sco_packet_now(void){ 502 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 503 if (!hci_stack->synchronous_flow_control_enabled) return 1; 504 return hci_number_free_sco_slots() > 0; 505 } 506 507 int hci_can_send_sco_packet_now(void){ 508 if (hci_stack->hci_packet_buffer_reserved) return 0; 509 return hci_can_send_prepared_sco_packet_now(); 510 } 511 512 void hci_request_sco_can_send_now_event(void){ 513 hci_stack->sco_waiting_for_can_send_now = 1; 514 hci_notify_if_sco_can_send_now(); 515 } 516 #endif 517 518 // used for internal checks in l2cap.c 519 int hci_is_packet_buffer_reserved(void){ 520 return hci_stack->hci_packet_buffer_reserved; 521 } 522 523 // reserves outgoing packet buffer. @returns 1 if successful 524 int hci_reserve_packet_buffer(void){ 525 if (hci_stack->hci_packet_buffer_reserved) { 526 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 527 return 0; 528 } 529 hci_stack->hci_packet_buffer_reserved = 1; 530 return 1; 531 } 532 533 void hci_release_packet_buffer(void){ 534 hci_stack->hci_packet_buffer_reserved = 0; 535 } 536 537 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 538 static int hci_transport_synchronous(void){ 539 return hci_stack->hci_transport->can_send_packet_now == NULL; 540 } 541 542 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 543 544 // 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); 545 546 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 547 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 548 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 549 max_acl_data_packet_length = hci_stack->le_data_packets_length; 550 } 551 552 // testing: reduce buffer to minimum 553 // max_acl_data_packet_length = 52; 554 555 log_debug("hci_send_acl_packet_fragments entered"); 556 557 int err; 558 // multiple packets could be send on a synchronous HCI transport 559 while (1){ 560 561 log_debug("hci_send_acl_packet_fragments loop entered"); 562 563 // get current data 564 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 565 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 566 int more_fragments = 0; 567 568 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 569 if (current_acl_data_packet_length > max_acl_data_packet_length){ 570 more_fragments = 1; 571 current_acl_data_packet_length = max_acl_data_packet_length; 572 } 573 574 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 575 if (acl_header_pos > 0){ 576 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 577 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 578 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 579 } 580 581 // update header len 582 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 583 584 // count packet 585 connection->num_acl_packets_sent++; 586 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 587 588 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 589 if (more_fragments){ 590 // update start of next fragment to send 591 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 592 } else { 593 // done 594 hci_stack->acl_fragmentation_pos = 0; 595 hci_stack->acl_fragmentation_total_size = 0; 596 } 597 598 // send packet 599 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 600 const int size = current_acl_data_packet_length + 4; 601 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 602 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 603 604 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 605 606 // done yet? 607 if (!more_fragments) break; 608 609 // can send more? 610 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 611 } 612 613 log_debug("hci_send_acl_packet_fragments loop over"); 614 615 // release buffer now for synchronous transport 616 if (hci_transport_synchronous()){ 617 hci_release_packet_buffer(); 618 // notify upper stack that it might be possible to send again 619 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 620 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 621 } 622 623 return err; 624 } 625 626 // pre: caller has reserved the packet buffer 627 int hci_send_acl_packet_buffer(int size){ 628 629 // log_info("hci_send_acl_packet_buffer size %u", size); 630 631 if (!hci_stack->hci_packet_buffer_reserved) { 632 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 633 return 0; 634 } 635 636 uint8_t * packet = hci_stack->hci_packet_buffer; 637 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 638 639 // check for free places on Bluetooth module 640 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 641 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 642 hci_release_packet_buffer(); 643 return BTSTACK_ACL_BUFFERS_FULL; 644 } 645 646 hci_connection_t *connection = hci_connection_for_handle( con_handle); 647 if (!connection) { 648 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 649 hci_release_packet_buffer(); 650 return 0; 651 } 652 653 #ifdef ENABLE_CLASSIC 654 hci_connection_timestamp(connection); 655 #endif 656 657 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 658 659 // setup data 660 hci_stack->acl_fragmentation_total_size = size; 661 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 662 663 return hci_send_acl_packet_fragments(connection); 664 } 665 666 #ifdef ENABLE_CLASSIC 667 // pre: caller has reserved the packet buffer 668 int hci_send_sco_packet_buffer(int size){ 669 670 // log_info("hci_send_acl_packet_buffer size %u", size); 671 672 if (!hci_stack->hci_packet_buffer_reserved) { 673 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 674 return 0; 675 } 676 677 uint8_t * packet = hci_stack->hci_packet_buffer; 678 679 // skip checks in loopback mode 680 if (!hci_stack->loopback_mode){ 681 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 682 683 // check for free places on Bluetooth module 684 if (!hci_can_send_prepared_sco_packet_now()) { 685 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 686 hci_release_packet_buffer(); 687 return BTSTACK_ACL_BUFFERS_FULL; 688 } 689 690 // track send packet in connection struct 691 hci_connection_t *connection = hci_connection_for_handle( con_handle); 692 if (!connection) { 693 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 694 hci_release_packet_buffer(); 695 return 0; 696 } 697 connection->num_sco_packets_sent++; 698 } 699 700 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 701 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 702 703 if (hci_transport_synchronous()){ 704 hci_release_packet_buffer(); 705 // notify upper stack that it might be possible to send again 706 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 707 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 708 } 709 710 return err; 711 } 712 #endif 713 714 static void acl_handler(uint8_t *packet, int size){ 715 716 // log_info("acl_handler: size %u", size); 717 718 // get info 719 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 720 hci_connection_t *conn = hci_connection_for_handle(con_handle); 721 uint8_t acl_flags = READ_ACL_FLAGS(packet); 722 uint16_t acl_length = READ_ACL_LENGTH(packet); 723 724 // ignore non-registered handle 725 if (!conn){ 726 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 727 return; 728 } 729 730 // assert packet is complete 731 if (acl_length + 4 != size){ 732 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 733 return; 734 } 735 736 #ifdef ENABLE_CLASSIC 737 // update idle timestamp 738 hci_connection_timestamp(conn); 739 #endif 740 741 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 742 hci_stack->host_completed_packets = 1; 743 conn->num_packets_completed++; 744 #endif 745 746 // handle different packet types 747 switch (acl_flags & 0x03) { 748 749 case 0x01: // continuation fragment 750 751 // sanity checks 752 if (conn->acl_recombination_pos == 0) { 753 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 754 return; 755 } 756 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 757 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 758 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 759 conn->acl_recombination_pos = 0; 760 return; 761 } 762 763 // append fragment payload (header already stored) 764 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 765 conn->acl_recombination_pos += acl_length; 766 767 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 768 // conn->acl_recombination_pos, conn->acl_recombination_length); 769 770 // forward complete L2CAP packet if complete. 771 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 772 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 773 // reset recombination buffer 774 conn->acl_recombination_length = 0; 775 conn->acl_recombination_pos = 0; 776 } 777 break; 778 779 case 0x02: { // first fragment 780 781 // sanity check 782 if (conn->acl_recombination_pos) { 783 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 784 conn->acl_recombination_pos = 0; 785 } 786 787 // peek into L2CAP packet! 788 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 789 790 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 791 792 // compare fragment size to L2CAP packet size 793 if (acl_length >= l2cap_length + 4){ 794 // forward fragment as L2CAP packet 795 hci_emit_acl_packet(packet, acl_length + 4); 796 } else { 797 798 if (acl_length > HCI_ACL_BUFFER_SIZE){ 799 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 800 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 801 return; 802 } 803 804 // store first fragment and tweak acl length for complete package 805 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 806 conn->acl_recombination_pos = acl_length + 4; 807 conn->acl_recombination_length = l2cap_length; 808 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 809 } 810 break; 811 812 } 813 default: 814 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 815 return; 816 } 817 818 // execute main loop 819 hci_run(); 820 } 821 822 static void hci_shutdown_connection(hci_connection_t *conn){ 823 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 824 825 #ifdef ENABLE_CLASSIC 826 #ifdef ENABLE_SCO_OVER_HCI 827 int addr_type = conn->address_type; 828 #endif 829 #endif 830 831 btstack_run_loop_remove_timer(&conn->timeout); 832 833 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 834 btstack_memory_hci_connection_free( conn ); 835 836 // now it's gone 837 hci_emit_nr_connections_changed(); 838 839 #ifdef ENABLE_CLASSIC 840 #ifdef ENABLE_SCO_OVER_HCI 841 // update SCO 842 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 843 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 844 } 845 #endif 846 #endif 847 } 848 849 #ifdef ENABLE_CLASSIC 850 851 static const uint16_t packet_type_sizes[] = { 852 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 853 HCI_ACL_DH1_SIZE, 0, 0, 0, 854 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 855 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 856 }; 857 static const uint8_t packet_type_feature_requirement_bit[] = { 858 0, // 3 slot packets 859 1, // 5 slot packets 860 25, // EDR 2 mpbs 861 26, // EDR 3 mbps 862 39, // 3 slot EDR packts 863 40, // 5 slot EDR packet 864 }; 865 static const uint16_t packet_type_feature_packet_mask[] = { 866 0x0f00, // 3 slot packets 867 0xf000, // 5 slot packets 868 0x1102, // EDR 2 mpbs 869 0x2204, // EDR 3 mbps 870 0x0300, // 3 slot EDR packts 871 0x3000, // 5 slot EDR packet 872 }; 873 874 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 875 // enable packet types based on size 876 uint16_t packet_types = 0; 877 unsigned int i; 878 for (i=0;i<16;i++){ 879 if (packet_type_sizes[i] == 0) continue; 880 if (packet_type_sizes[i] <= buffer_size){ 881 packet_types |= 1 << i; 882 } 883 } 884 // disable packet types due to missing local supported features 885 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 886 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 887 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 888 if (feature_set) continue; 889 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 890 packet_types &= ~packet_type_feature_packet_mask[i]; 891 } 892 // flip bits for "may not be used" 893 packet_types ^= 0x3306; 894 return packet_types; 895 } 896 897 uint16_t hci_usable_acl_packet_types(void){ 898 return hci_stack->packet_types; 899 } 900 #endif 901 902 uint8_t* hci_get_outgoing_packet_buffer(void){ 903 // hci packet buffer is >= acl data packet length 904 return hci_stack->hci_packet_buffer; 905 } 906 907 uint16_t hci_max_acl_data_packet_length(void){ 908 return hci_stack->acl_data_packet_length; 909 } 910 911 #ifdef ENABLE_CLASSIC 912 int hci_extended_sco_link_supported(void){ 913 // No. 31, byte 3, bit 7 914 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 915 } 916 #endif 917 918 int hci_non_flushable_packet_boundary_flag_supported(void){ 919 // No. 54, byte 6, bit 6 920 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 921 } 922 923 static int gap_ssp_supported(void){ 924 // No. 51, byte 6, bit 3 925 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 926 } 927 928 static int hci_classic_supported(void){ 929 #ifdef ENABLE_CLASSIC 930 // No. 37, byte 4, bit 5, = No BR/EDR Support 931 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 932 #else 933 return 0; 934 #endif 935 } 936 937 static int hci_le_supported(void){ 938 #ifdef ENABLE_BLE 939 // No. 37, byte 4, bit 6 = LE Supported (Controller) 940 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 941 #else 942 return 0; 943 #endif 944 } 945 946 #ifdef ENABLE_BLE 947 948 /** 949 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 950 */ 951 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 952 *addr_type = hci_stack->le_own_addr_type; 953 if (hci_stack->le_own_addr_type){ 954 memcpy(addr, hci_stack->le_random_address, 6); 955 } else { 956 memcpy(addr, hci_stack->local_bd_addr, 6); 957 } 958 } 959 960 #ifdef ENABLE_LE_CENTRAL 961 void le_handle_advertisement_report(uint8_t *packet, int size){ 962 963 UNUSED(size); 964 965 int offset = 3; 966 int num_reports = packet[offset]; 967 offset += 1; 968 969 int i; 970 // log_info("HCI: handle adv report with num reports: %d", num_reports); 971 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 972 for (i=0; i<num_reports;i++){ 973 uint8_t data_length = packet[offset + 8]; 974 uint8_t event_size = 10 + data_length; 975 int pos = 0; 976 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 977 event[pos++] = event_size; 978 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 979 offset += 8; 980 pos += 8; 981 event[pos++] = packet[offset + 1 + data_length]; // rssi 982 event[pos++] = packet[offset++]; //data_length; 983 memcpy(&event[pos], &packet[offset], data_length); 984 pos += data_length; 985 offset += data_length + 1; // rssi 986 hci_emit_event(event, pos, 1); 987 } 988 } 989 #endif 990 #endif 991 992 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 993 994 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 995 if (!hci_stack->config) return 0; 996 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 997 // Limit baud rate for Broadcom chipsets to 3 mbps 998 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 999 baud_rate = 3000000; 1000 } 1001 return baud_rate; 1002 } 1003 1004 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1005 UNUSED(ds); 1006 1007 switch (hci_stack->substate){ 1008 case HCI_INIT_W4_SEND_RESET: 1009 log_info("Resend HCI Reset"); 1010 hci_stack->substate = HCI_INIT_SEND_RESET; 1011 hci_stack->num_cmd_packets = 1; 1012 hci_run(); 1013 break; 1014 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1015 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1016 if (hci_stack->hci_transport->reset_link){ 1017 hci_stack->hci_transport->reset_link(); 1018 } 1019 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1020 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1021 log_info("Resend HCI Reset - CSR Warm Boot"); 1022 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1023 hci_stack->num_cmd_packets = 1; 1024 hci_run(); 1025 break; 1026 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1027 if (hci_stack->hci_transport->set_baudrate){ 1028 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1029 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1030 hci_stack->hci_transport->set_baudrate(baud_rate); 1031 } 1032 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1033 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1034 if (hci_stack->hci_transport->reset_link){ 1035 log_info("Link Reset"); 1036 hci_stack->hci_transport->reset_link(); 1037 } 1038 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1039 hci_run(); 1040 } 1041 break; 1042 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1043 // otherwise continue 1044 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1045 hci_send_cmd(&hci_read_local_supported_commands); 1046 break; 1047 default: 1048 break; 1049 } 1050 } 1051 #endif 1052 1053 static void hci_initializing_next_state(void){ 1054 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1055 } 1056 1057 // assumption: hci_can_send_command_packet_now() == true 1058 static void hci_initializing_run(void){ 1059 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1060 switch (hci_stack->substate){ 1061 case HCI_INIT_SEND_RESET: 1062 hci_state_reset(); 1063 1064 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1065 // prepare reset if command complete not received in 100ms 1066 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1067 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1068 btstack_run_loop_add_timer(&hci_stack->timeout); 1069 #endif 1070 // send command 1071 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1072 hci_send_cmd(&hci_reset); 1073 break; 1074 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1075 hci_send_cmd(&hci_read_local_version_information); 1076 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1077 break; 1078 case HCI_INIT_SEND_READ_LOCAL_NAME: 1079 hci_send_cmd(&hci_read_local_name); 1080 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1081 break; 1082 1083 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1084 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1085 hci_state_reset(); 1086 // prepare reset if command complete not received in 100ms 1087 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1088 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1089 btstack_run_loop_add_timer(&hci_stack->timeout); 1090 // send command 1091 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1092 hci_send_cmd(&hci_reset); 1093 break; 1094 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1095 hci_state_reset(); 1096 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1097 hci_send_cmd(&hci_reset); 1098 break; 1099 case HCI_INIT_SEND_BAUD_CHANGE: { 1100 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1101 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1102 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1103 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1104 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1105 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1106 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1107 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1108 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1109 btstack_run_loop_add_timer(&hci_stack->timeout); 1110 } 1111 break; 1112 } 1113 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1114 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1115 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1116 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1117 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1118 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1119 break; 1120 } 1121 case HCI_INIT_CUSTOM_INIT: 1122 // Custom initialization 1123 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1124 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1125 if (valid_cmd){ 1126 int size = 3 + hci_stack->hci_packet_buffer[2]; 1127 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1128 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1129 switch (valid_cmd) { 1130 case 1: 1131 default: 1132 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1133 break; 1134 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1135 log_info("CSR Warm Boot"); 1136 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1137 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1138 btstack_run_loop_add_timer(&hci_stack->timeout); 1139 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1140 && hci_stack->config 1141 && hci_stack->chipset 1142 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1143 && hci_stack->hci_transport->set_baudrate 1144 && hci_transport_uart_get_main_baud_rate()){ 1145 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1146 } else { 1147 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1148 } 1149 break; 1150 } 1151 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1152 break; 1153 } 1154 log_info("Init script done"); 1155 1156 // Init script download on Broadcom chipsets causes: 1157 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1158 // - baud rate to reset, restore UART baud rate if needed 1159 int need_baud_change = hci_stack->config 1160 && hci_stack->chipset 1161 && hci_stack->chipset->set_baudrate_command 1162 && hci_stack->hci_transport->set_baudrate 1163 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1164 if (need_baud_change) { 1165 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1166 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1167 hci_stack->hci_transport->set_baudrate(baud_rate); 1168 } 1169 1170 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1171 // -> Work around: wait a few milliseconds here. 1172 log_info("BCM delay after init script"); 1173 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1174 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1175 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1176 btstack_run_loop_add_timer(&hci_stack->timeout); 1177 break; 1178 } 1179 } 1180 // otherwise continue 1181 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1182 hci_send_cmd(&hci_read_local_supported_commands); 1183 break; 1184 case HCI_INIT_SET_BD_ADDR: 1185 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1186 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1187 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1188 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1189 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1190 break; 1191 #endif 1192 1193 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1194 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1195 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1196 hci_send_cmd(&hci_read_local_supported_commands); 1197 break; 1198 case HCI_INIT_READ_BD_ADDR: 1199 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1200 hci_send_cmd(&hci_read_bd_addr); 1201 break; 1202 case HCI_INIT_READ_BUFFER_SIZE: 1203 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1204 hci_send_cmd(&hci_read_buffer_size); 1205 break; 1206 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1207 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1208 hci_send_cmd(&hci_read_local_supported_features); 1209 break; 1210 1211 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1212 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1213 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1214 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1215 break; 1216 case HCI_INIT_HOST_BUFFER_SIZE: 1217 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1218 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1219 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1220 break; 1221 #endif 1222 1223 case HCI_INIT_SET_EVENT_MASK: 1224 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1225 if (hci_le_supported()){ 1226 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1227 } else { 1228 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1229 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1230 } 1231 break; 1232 1233 #ifdef ENABLE_CLASSIC 1234 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1235 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1236 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1237 break; 1238 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1239 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1240 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1241 break; 1242 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1243 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1244 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1245 break; 1246 case HCI_INIT_WRITE_LOCAL_NAME: 1247 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1248 if (hci_stack->local_name){ 1249 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1250 } else { 1251 char local_name[8+17+1]; 1252 // BTstack 11:22:33:44:55:66 1253 memcpy(local_name, "BTstack ", 8); 1254 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1255 local_name[8+17] = '\0'; 1256 log_info("---> Name %s", local_name); 1257 hci_send_cmd(&hci_write_local_name, local_name); 1258 } 1259 break; 1260 case HCI_INIT_WRITE_EIR_DATA: 1261 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1262 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1263 break; 1264 case HCI_INIT_WRITE_INQUIRY_MODE: 1265 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1266 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1267 break; 1268 case HCI_INIT_WRITE_SCAN_ENABLE: 1269 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1270 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1271 break; 1272 // only sent if ENABLE_SCO_OVER_HCI is defined 1273 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1274 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1275 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1276 break; 1277 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1278 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1279 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1280 break; 1281 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1282 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1283 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1284 log_info("BCM: Route SCO data via HCI transport"); 1285 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1286 break; 1287 1288 #endif 1289 #ifdef ENABLE_BLE 1290 // LE INIT 1291 case HCI_INIT_LE_READ_BUFFER_SIZE: 1292 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1293 hci_send_cmd(&hci_le_read_buffer_size); 1294 break; 1295 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1296 // LE Supported Host = 1, Simultaneous Host = 0 1297 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1298 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1299 break; 1300 #ifdef ENABLE_LE_CENTRAL 1301 case HCI_INIT_READ_WHITE_LIST_SIZE: 1302 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1303 hci_send_cmd(&hci_le_read_white_list_size); 1304 break; 1305 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1306 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1307 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1308 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1309 break; 1310 #endif 1311 #endif 1312 default: 1313 return; 1314 } 1315 } 1316 1317 static void hci_init_done(void){ 1318 // done. tell the app 1319 log_info("hci_init_done -> HCI_STATE_WORKING"); 1320 hci_stack->state = HCI_STATE_WORKING; 1321 hci_emit_state(); 1322 hci_run(); 1323 } 1324 1325 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1326 UNUSED(size); 1327 1328 uint8_t command_completed = 0; 1329 1330 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1331 uint16_t opcode = little_endian_read_16(packet,3); 1332 if (opcode == hci_stack->last_cmd_opcode){ 1333 command_completed = 1; 1334 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1335 } else { 1336 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1337 } 1338 } 1339 1340 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1341 uint8_t status = packet[2]; 1342 uint16_t opcode = little_endian_read_16(packet,4); 1343 if (opcode == hci_stack->last_cmd_opcode){ 1344 if (status){ 1345 command_completed = 1; 1346 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1347 } else { 1348 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1349 } 1350 } else { 1351 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1352 } 1353 } 1354 1355 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1356 1357 // Vendor == CSR 1358 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1359 // TODO: track actual command 1360 command_completed = 1; 1361 } 1362 1363 // Vendor == Toshiba 1364 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1365 // TODO: track actual command 1366 command_completed = 1; 1367 } 1368 1369 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1370 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1371 // 1372 // HCI Reset 1373 // Timeout 100 ms 1374 // HCI Reset 1375 // Command Complete Reset 1376 // HCI Read Local Version Information 1377 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1378 // hang... 1379 // 1380 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1381 if (!command_completed 1382 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1383 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1384 1385 uint16_t opcode = little_endian_read_16(packet,3); 1386 if (opcode == hci_reset.opcode){ 1387 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1388 return; 1389 } 1390 } 1391 1392 // CSR & H5 1393 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1394 if (!command_completed 1395 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1396 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1397 1398 uint16_t opcode = little_endian_read_16(packet,3); 1399 if (opcode == hci_reset.opcode){ 1400 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1401 return; 1402 } 1403 } 1404 1405 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1406 // fix: Correct substate and behave as command below 1407 if (command_completed){ 1408 switch (hci_stack->substate){ 1409 case HCI_INIT_SEND_RESET: 1410 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1411 break; 1412 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1413 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1414 break; 1415 default: 1416 break; 1417 } 1418 } 1419 1420 #endif 1421 1422 if (!command_completed) return; 1423 1424 int need_baud_change = 0; 1425 int need_addr_change = 0; 1426 1427 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1428 need_baud_change = hci_stack->config 1429 && hci_stack->chipset 1430 && hci_stack->chipset->set_baudrate_command 1431 && hci_stack->hci_transport->set_baudrate 1432 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1433 1434 need_addr_change = hci_stack->custom_bd_addr_set 1435 && hci_stack->chipset 1436 && hci_stack->chipset->set_bd_addr_command; 1437 #endif 1438 1439 switch(hci_stack->substate){ 1440 1441 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1442 case HCI_INIT_SEND_RESET: 1443 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1444 // fix: just correct substate and behave as command below 1445 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1446 btstack_run_loop_remove_timer(&hci_stack->timeout); 1447 break; 1448 case HCI_INIT_W4_SEND_RESET: 1449 btstack_run_loop_remove_timer(&hci_stack->timeout); 1450 break; 1451 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1452 log_info("Received local name, need baud change %d", need_baud_change); 1453 if (need_baud_change){ 1454 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1455 return; 1456 } 1457 // skip baud change 1458 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1459 return; 1460 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1461 // for STLC2500D, baud rate change already happened. 1462 // for others, baud rate gets changed now 1463 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1464 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1465 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1466 hci_stack->hci_transport->set_baudrate(baud_rate); 1467 } 1468 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1469 return; 1470 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1471 btstack_run_loop_remove_timer(&hci_stack->timeout); 1472 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1473 return; 1474 case HCI_INIT_W4_CUSTOM_INIT: 1475 // repeat custom init 1476 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1477 return; 1478 #else 1479 case HCI_INIT_W4_SEND_RESET: 1480 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1481 return ; 1482 #endif 1483 1484 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1485 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1486 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1487 return; 1488 } 1489 if (need_addr_change){ 1490 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1491 return; 1492 } 1493 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1494 return; 1495 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1496 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1497 if (need_baud_change){ 1498 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1499 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1500 hci_stack->hci_transport->set_baudrate(baud_rate); 1501 } 1502 if (need_addr_change){ 1503 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1504 return; 1505 } 1506 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1507 return; 1508 case HCI_INIT_W4_SET_BD_ADDR: 1509 // for STLC2500D, bd addr change only gets active after sending reset command 1510 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1511 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1512 return; 1513 } 1514 // skipping st warm boot 1515 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1516 return; 1517 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1518 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1519 return; 1520 #endif 1521 case HCI_INIT_W4_READ_BD_ADDR: 1522 // only read buffer size if supported 1523 if (hci_stack->local_supported_commands[0] & 0x01) { 1524 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1525 return; 1526 } 1527 // skipping read buffer size 1528 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1529 return; 1530 case HCI_INIT_W4_SET_EVENT_MASK: 1531 // skip Classic init commands for LE only chipsets 1532 if (!hci_classic_supported()){ 1533 #ifdef ENABLE_BLE 1534 if (hci_le_supported()){ 1535 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1536 return; 1537 } 1538 #endif 1539 log_error("Neither BR/EDR nor LE supported"); 1540 hci_init_done(); 1541 return; 1542 } 1543 if (!gap_ssp_supported()){ 1544 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1545 return; 1546 } 1547 break; 1548 #ifdef ENABLE_BLE 1549 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1550 // skip write le host if not supported (e.g. on LE only EM9301) 1551 if (hci_stack->local_supported_commands[0] & 0x02) break; 1552 #ifdef ENABLE_LE_CENTRAL 1553 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1554 #else 1555 hci_init_done(); 1556 #endif 1557 return; 1558 #endif 1559 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1560 // skip write eir data if no eir data set 1561 if (hci_stack->eir_data) break; 1562 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1563 return; 1564 1565 #ifdef ENABLE_SCO_OVER_HCI 1566 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1567 // skip write synchronous flow control if not supported 1568 if (hci_stack->local_supported_commands[0] & 0x04) break; 1569 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1570 // explicit fall through to reduce repetitions 1571 1572 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1573 // skip write default erroneous data reporting if not supported 1574 if (hci_stack->local_supported_commands[0] & 0x08) break; 1575 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1576 // explicit fall through to reduce repetitions 1577 1578 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1579 // skip bcm set sco pcm config on non-Broadcom chipsets 1580 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1581 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1582 // explicit fall through to reduce repetitions 1583 1584 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1585 if (!hci_le_supported()){ 1586 // SKIP LE init for Classic only configuration 1587 hci_init_done(); 1588 return; 1589 } 1590 break; 1591 1592 #else /* !ENABLE_SCO_OVER_HCI */ 1593 1594 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1595 #ifdef ENABLE_BLE 1596 if (hci_le_supported()){ 1597 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1598 return; 1599 } 1600 #endif 1601 // SKIP LE init for Classic only configuration 1602 hci_init_done(); 1603 return; 1604 #endif /* ENABLE_SCO_OVER_HCI */ 1605 1606 // Response to command before init done state -> init done 1607 case (HCI_INIT_DONE-1): 1608 hci_init_done(); 1609 return; 1610 1611 default: 1612 break; 1613 } 1614 hci_initializing_next_state(); 1615 } 1616 1617 static void event_handler(uint8_t *packet, int size){ 1618 1619 uint16_t event_length = packet[1]; 1620 1621 // assert packet is complete 1622 if (size != event_length + 2){ 1623 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1624 return; 1625 } 1626 1627 bd_addr_t addr; 1628 bd_addr_type_t addr_type; 1629 hci_con_handle_t handle; 1630 hci_connection_t * conn; 1631 int i; 1632 #ifdef ENABLE_CLASSIC 1633 uint8_t link_type; 1634 #endif 1635 1636 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1637 1638 switch (hci_event_packet_get_type(packet)) { 1639 1640 case HCI_EVENT_COMMAND_COMPLETE: 1641 // get num cmd packets - limit to 1 to reduce complexity 1642 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1643 1644 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1645 if (packet[5]) break; 1646 // terminate, name 248 chars 1647 packet[6+248] = 0; 1648 log_info("local name: %s", &packet[6]); 1649 } 1650 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1651 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1652 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1653 uint16_t acl_len = little_endian_read_16(packet, 6); 1654 uint16_t sco_len = packet[8]; 1655 1656 // determine usable ACL/SCO payload size 1657 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1658 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1659 1660 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1661 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1662 1663 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1664 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1665 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1666 } 1667 } 1668 #ifdef ENABLE_BLE 1669 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1670 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1671 hci_stack->le_acl_packets_total_num = packet[8]; 1672 // determine usable ACL payload size 1673 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1674 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1675 } 1676 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1677 } 1678 #ifdef ENABLE_LE_CENTRAL 1679 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1680 hci_stack->le_whitelist_capacity = packet[6]; 1681 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1682 } 1683 #endif 1684 #endif 1685 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1686 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1687 hci_stack->local_bd_addr); 1688 log_info("Local Address, Status: 0x%02x: Addr: %s", 1689 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1690 #ifdef ENABLE_CLASSIC 1691 if (hci_stack->link_key_db){ 1692 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1693 } 1694 #endif 1695 } 1696 #ifdef ENABLE_CLASSIC 1697 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1698 hci_emit_discoverable_enabled(hci_stack->discoverable); 1699 } 1700 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1701 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1702 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1703 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1704 hci_emit_event(event, sizeof(event), 1); 1705 } 1706 } 1707 #endif 1708 1709 // Note: HCI init checks 1710 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1711 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1712 1713 #ifdef ENABLE_CLASSIC 1714 // determine usable ACL packet types based on host buffer size and supported features 1715 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1716 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1717 #endif 1718 // Classic/LE 1719 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1720 } 1721 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1722 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1723 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1724 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1725 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1726 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1727 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1728 } 1729 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1730 hci_stack->local_supported_commands[0] = 1731 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1732 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1733 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1734 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1735 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1736 } 1737 #ifdef ENABLE_CLASSIC 1738 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1739 if (packet[5] == 0){ 1740 hci_stack->synchronous_flow_control_enabled = 1; 1741 } 1742 } 1743 #endif 1744 break; 1745 1746 case HCI_EVENT_COMMAND_STATUS: 1747 // get num cmd packets - limit to 1 to reduce complexity 1748 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1749 break; 1750 1751 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1752 int offset = 3; 1753 for (i=0; i<packet[2];i++){ 1754 handle = little_endian_read_16(packet, offset); 1755 offset += 2; 1756 uint16_t num_packets = little_endian_read_16(packet, offset); 1757 offset += 2; 1758 1759 conn = hci_connection_for_handle(handle); 1760 if (!conn){ 1761 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1762 continue; 1763 } 1764 1765 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1766 #ifdef ENABLE_CLASSIC 1767 if (conn->num_sco_packets_sent >= num_packets){ 1768 conn->num_sco_packets_sent -= num_packets; 1769 } else { 1770 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1771 conn->num_sco_packets_sent = 0; 1772 } 1773 hci_notify_if_sco_can_send_now(); 1774 #endif 1775 } else { 1776 if (conn->num_acl_packets_sent >= num_packets){ 1777 conn->num_acl_packets_sent -= num_packets; 1778 } else { 1779 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1780 conn->num_acl_packets_sent = 0; 1781 } 1782 } 1783 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1784 } 1785 break; 1786 } 1787 1788 #ifdef ENABLE_CLASSIC 1789 case HCI_EVENT_INQUIRY_COMPLETE: 1790 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1791 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1792 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1793 hci_emit_event(event, sizeof(event), 1); 1794 } 1795 break; 1796 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1797 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1798 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1799 } 1800 break; 1801 case HCI_EVENT_CONNECTION_REQUEST: 1802 reverse_bd_addr(&packet[2], addr); 1803 // TODO: eval COD 8-10 1804 link_type = packet[11]; 1805 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1806 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1807 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1808 if (!conn) { 1809 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1810 } 1811 if (!conn) { 1812 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1813 hci_stack->decline_reason = 0x0d; 1814 bd_addr_copy(hci_stack->decline_addr, addr); 1815 break; 1816 } 1817 conn->role = HCI_ROLE_SLAVE; 1818 conn->state = RECEIVED_CONNECTION_REQUEST; 1819 // store info about eSCO 1820 if (link_type == 0x02){ 1821 conn->remote_supported_feature_eSCO = 1; 1822 } 1823 hci_run(); 1824 break; 1825 1826 case HCI_EVENT_CONNECTION_COMPLETE: 1827 // Connection management 1828 reverse_bd_addr(&packet[5], addr); 1829 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1830 addr_type = BD_ADDR_TYPE_CLASSIC; 1831 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1832 if (conn) { 1833 if (!packet[2]){ 1834 conn->state = OPEN; 1835 conn->con_handle = little_endian_read_16(packet, 3); 1836 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1837 1838 // restart timer 1839 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1840 btstack_run_loop_add_timer(&conn->timeout); 1841 1842 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1843 1844 hci_emit_nr_connections_changed(); 1845 } else { 1846 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1847 uint8_t status = packet[2]; 1848 bd_addr_t bd_address; 1849 memcpy(&bd_address, conn->address, 6); 1850 1851 // connection failed, remove entry 1852 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1853 btstack_memory_hci_connection_free( conn ); 1854 1855 // notify client if dedicated bonding 1856 if (notify_dedicated_bonding_failed){ 1857 log_info("hci notify_dedicated_bonding_failed"); 1858 hci_emit_dedicated_bonding_result(bd_address, status); 1859 } 1860 1861 // if authentication error, also delete link key 1862 if (packet[2] == 0x05) { 1863 gap_drop_link_key_for_bd_addr(addr); 1864 } 1865 } 1866 } 1867 break; 1868 1869 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1870 reverse_bd_addr(&packet[5], addr); 1871 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1872 if (packet[2]){ 1873 // connection failed 1874 break; 1875 } 1876 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1877 if (!conn) { 1878 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1879 } 1880 if (!conn) { 1881 break; 1882 } 1883 conn->state = OPEN; 1884 conn->con_handle = little_endian_read_16(packet, 3); 1885 1886 #ifdef ENABLE_SCO_OVER_HCI 1887 // update SCO 1888 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1889 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1890 } 1891 #endif 1892 break; 1893 1894 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1895 handle = little_endian_read_16(packet, 3); 1896 conn = hci_connection_for_handle(handle); 1897 if (!conn) break; 1898 if (!packet[2]){ 1899 uint8_t * features = &packet[5]; 1900 if (features[6] & (1 << 3)){ 1901 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1902 } 1903 if (features[3] & (1<<7)){ 1904 conn->remote_supported_feature_eSCO = 1; 1905 } 1906 } 1907 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1908 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1909 if (conn->bonding_flags & BONDING_DEDICATED){ 1910 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1911 } 1912 break; 1913 1914 case HCI_EVENT_LINK_KEY_REQUEST: 1915 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1916 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1917 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1918 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1919 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1920 hci_run(); 1921 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1922 return; 1923 1924 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1925 reverse_bd_addr(&packet[2], addr); 1926 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1927 if (!conn) break; 1928 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1929 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1930 // Change Connection Encryption keeps link key type 1931 if (link_key_type != CHANGED_COMBINATION_KEY){ 1932 conn->link_key_type = link_key_type; 1933 } 1934 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1935 // still forward event to allow dismiss of pairing dialog 1936 break; 1937 } 1938 1939 case HCI_EVENT_PIN_CODE_REQUEST: 1940 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1941 // non-bondable mode: pin code negative reply will be sent 1942 if (!hci_stack->bondable){ 1943 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1944 hci_run(); 1945 return; 1946 } 1947 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1948 if (!hci_stack->link_key_db) break; 1949 hci_event_pin_code_request_get_bd_addr(packet, addr); 1950 hci_stack->link_key_db->delete_link_key(addr); 1951 break; 1952 1953 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1954 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1955 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1956 break; 1957 1958 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1959 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1960 if (!hci_stack->ssp_auto_accept) break; 1961 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1962 break; 1963 1964 case HCI_EVENT_USER_PASSKEY_REQUEST: 1965 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1966 if (!hci_stack->ssp_auto_accept) break; 1967 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1968 break; 1969 #endif 1970 1971 case HCI_EVENT_ENCRYPTION_CHANGE: 1972 handle = little_endian_read_16(packet, 3); 1973 conn = hci_connection_for_handle(handle); 1974 if (!conn) break; 1975 if (packet[2] == 0) { 1976 if (packet[5]){ 1977 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1978 } else { 1979 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1980 } 1981 } 1982 #ifdef ENABLE_CLASSIC 1983 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1984 #endif 1985 break; 1986 1987 #ifdef ENABLE_CLASSIC 1988 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1989 handle = little_endian_read_16(packet, 3); 1990 conn = hci_connection_for_handle(handle); 1991 if (!conn) break; 1992 1993 // dedicated bonding: send result and disconnect 1994 if (conn->bonding_flags & BONDING_DEDICATED){ 1995 conn->bonding_flags &= ~BONDING_DEDICATED; 1996 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1997 conn->bonding_status = packet[2]; 1998 break; 1999 } 2000 2001 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2002 // link key sufficient for requested security 2003 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2004 break; 2005 } 2006 // not enough 2007 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2008 break; 2009 #endif 2010 2011 // HCI_EVENT_DISCONNECTION_COMPLETE 2012 // has been split, to first notify stack before shutting connection down 2013 // see end of function, too. 2014 case HCI_EVENT_DISCONNECTION_COMPLETE: 2015 if (packet[2]) break; // status != 0 2016 handle = little_endian_read_16(packet, 3); 2017 // drop outgoing ACL fragments if it is for closed connection 2018 if (hci_stack->acl_fragmentation_total_size > 0) { 2019 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2020 log_info("hci: drop fragmented ACL data for closed connection"); 2021 hci_stack->acl_fragmentation_total_size = 0; 2022 hci_stack->acl_fragmentation_pos = 0; 2023 } 2024 } 2025 2026 // re-enable advertisements for le connections if active 2027 conn = hci_connection_for_handle(handle); 2028 if (!conn) break; 2029 #ifdef ENABLE_BLE 2030 #ifdef ENABLE_LE_PERIPHERAL 2031 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2032 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2033 } 2034 #endif 2035 #endif 2036 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2037 break; 2038 2039 case HCI_EVENT_HARDWARE_ERROR: 2040 log_error("Hardware Error: 0x%02x", packet[2]); 2041 if (hci_stack->hardware_error_callback){ 2042 (*hci_stack->hardware_error_callback)(packet[2]); 2043 } else { 2044 // if no special requests, just reboot stack 2045 hci_power_control_off(); 2046 hci_power_control_on(); 2047 } 2048 break; 2049 2050 #ifdef ENABLE_CLASSIC 2051 case HCI_EVENT_ROLE_CHANGE: 2052 if (packet[2]) break; // status != 0 2053 handle = little_endian_read_16(packet, 3); 2054 conn = hci_connection_for_handle(handle); 2055 if (!conn) break; // no conn 2056 conn->role = packet[9]; 2057 break; 2058 #endif 2059 2060 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2061 // release packet buffer only for asynchronous transport and if there are not further fragements 2062 if (hci_transport_synchronous()) { 2063 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2064 return; // instead of break: to avoid re-entering hci_run() 2065 } 2066 if (hci_stack->acl_fragmentation_total_size) break; 2067 hci_release_packet_buffer(); 2068 2069 // L2CAP receives this event via the hci_emit_event below 2070 2071 #ifdef ENABLE_CLASSIC 2072 // For SCO, we do the can_send_now_check here 2073 hci_notify_if_sco_can_send_now(); 2074 #endif 2075 break; 2076 2077 #ifdef ENABLE_CLASSIC 2078 case HCI_EVENT_SCO_CAN_SEND_NOW: 2079 // For SCO, we do the can_send_now_check here 2080 hci_notify_if_sco_can_send_now(); 2081 return; 2082 2083 // explode inquriy results for easier consumption 2084 case HCI_EVENT_INQUIRY_RESULT: 2085 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2086 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2087 gap_inquiry_explode(packet); 2088 break; 2089 #endif 2090 2091 #ifdef ENABLE_BLE 2092 case HCI_EVENT_LE_META: 2093 switch (packet[2]){ 2094 #ifdef ENABLE_LE_CENTRAL 2095 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2096 // log_info("advertising report received"); 2097 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2098 le_handle_advertisement_report(packet, size); 2099 break; 2100 #endif 2101 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2102 // Connection management 2103 reverse_bd_addr(&packet[8], addr); 2104 addr_type = (bd_addr_type_t)packet[7]; 2105 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2106 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2107 #ifdef ENABLE_LE_CENTRAL 2108 // if auto-connect, remove from whitelist in both roles 2109 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2110 hci_remove_from_whitelist(addr_type, addr); 2111 } 2112 // handle error: error is reported only to the initiator -> outgoing connection 2113 if (packet[3]){ 2114 // outgoing connection establishment is done 2115 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2116 // remove entry 2117 if (conn){ 2118 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2119 btstack_memory_hci_connection_free( conn ); 2120 } 2121 break; 2122 } 2123 #endif 2124 // on success, both hosts receive connection complete event 2125 if (packet[6] == HCI_ROLE_MASTER){ 2126 #ifdef ENABLE_LE_CENTRAL 2127 // if we're master, it was an outgoing connection and we're done with it 2128 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2129 #endif 2130 } else { 2131 #ifdef ENABLE_LE_PERIPHERAL 2132 // if we're slave, it was an incoming connection, advertisements have stopped 2133 hci_stack->le_advertisements_active = 0; 2134 // try to re-enable them 2135 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2136 #endif 2137 } 2138 // LE connections are auto-accepted, so just create a connection if there isn't one already 2139 if (!conn){ 2140 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2141 } 2142 // no memory, sorry. 2143 if (!conn){ 2144 break; 2145 } 2146 2147 conn->state = OPEN; 2148 conn->role = packet[6]; 2149 conn->con_handle = little_endian_read_16(packet, 4); 2150 2151 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2152 2153 // restart timer 2154 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2155 // btstack_run_loop_add_timer(&conn->timeout); 2156 2157 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2158 2159 hci_emit_nr_connections_changed(); 2160 break; 2161 2162 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2163 2164 default: 2165 break; 2166 } 2167 break; 2168 #endif 2169 default: 2170 break; 2171 } 2172 2173 // handle BT initialization 2174 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2175 hci_initializing_event_handler(packet, size); 2176 } 2177 2178 // help with BT sleep 2179 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2180 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2181 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2182 hci_initializing_next_state(); 2183 } 2184 2185 // notify upper stack 2186 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2187 2188 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2189 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2190 if (!packet[2]){ 2191 handle = little_endian_read_16(packet, 3); 2192 hci_connection_t * aConn = hci_connection_for_handle(handle); 2193 if (aConn) { 2194 uint8_t status = aConn->bonding_status; 2195 uint16_t flags = aConn->bonding_flags; 2196 bd_addr_t bd_address; 2197 memcpy(&bd_address, aConn->address, 6); 2198 hci_shutdown_connection(aConn); 2199 // connection struct is gone, don't access anymore 2200 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2201 hci_emit_dedicated_bonding_result(bd_address, status); 2202 } 2203 } 2204 } 2205 } 2206 2207 // execute main loop 2208 hci_run(); 2209 } 2210 2211 #ifdef ENABLE_CLASSIC 2212 static void sco_handler(uint8_t * packet, uint16_t size){ 2213 if (!hci_stack->sco_packet_handler) return; 2214 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2215 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2216 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2217 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2218 if (conn){ 2219 conn->num_packets_completed++; 2220 hci_stack->host_completed_packets = 1; 2221 hci_run(); 2222 } 2223 #endif 2224 } 2225 #endif 2226 2227 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2228 hci_dump_packet(packet_type, 1, packet, size); 2229 switch (packet_type) { 2230 case HCI_EVENT_PACKET: 2231 event_handler(packet, size); 2232 break; 2233 case HCI_ACL_DATA_PACKET: 2234 acl_handler(packet, size); 2235 break; 2236 #ifdef ENABLE_CLASSIC 2237 case HCI_SCO_DATA_PACKET: 2238 sco_handler(packet, size); 2239 break; 2240 #endif 2241 default: 2242 break; 2243 } 2244 } 2245 2246 /** 2247 * @brief Add event packet handler. 2248 */ 2249 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2250 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2251 } 2252 2253 2254 /** Register HCI packet handlers */ 2255 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2256 hci_stack->acl_packet_handler = handler; 2257 } 2258 2259 #ifdef ENABLE_CLASSIC 2260 /** 2261 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2262 */ 2263 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2264 hci_stack->sco_packet_handler = handler; 2265 } 2266 #endif 2267 2268 static void hci_state_reset(void){ 2269 // no connections yet 2270 hci_stack->connections = NULL; 2271 2272 // keep discoverable/connectable as this has been requested by the client(s) 2273 // hci_stack->discoverable = 0; 2274 // hci_stack->connectable = 0; 2275 // hci_stack->bondable = 1; 2276 // hci_stack->own_addr_type = 0; 2277 2278 // buffer is free 2279 hci_stack->hci_packet_buffer_reserved = 0; 2280 2281 // no pending cmds 2282 hci_stack->decline_reason = 0; 2283 hci_stack->new_scan_enable_value = 0xff; 2284 2285 // LE 2286 #ifdef ENABLE_BLE 2287 memset(hci_stack->le_random_address, 0, 6); 2288 hci_stack->le_random_address_set = 0; 2289 #endif 2290 #ifdef ENABLE_LE_CENTRAL 2291 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2292 hci_stack->le_scan_type = 0xff; 2293 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2294 hci_stack->le_whitelist = 0; 2295 hci_stack->le_whitelist_capacity = 0; 2296 #endif 2297 2298 // connection parameter range used to answer connection parameter update requests in l2cap 2299 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2300 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2301 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2302 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2303 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2304 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2305 2306 // connection parameter to use for outgoing connections 2307 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2308 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2309 hci_stack->le_connection_latency = 4; // 4 2310 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2311 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2312 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2313 } 2314 2315 #ifdef ENABLE_CLASSIC 2316 /** 2317 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2318 */ 2319 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2320 // store and open remote device db 2321 hci_stack->link_key_db = link_key_db; 2322 if (hci_stack->link_key_db) { 2323 hci_stack->link_key_db->open(); 2324 } 2325 } 2326 #endif 2327 2328 void hci_init(const hci_transport_t *transport, const void *config){ 2329 2330 #ifdef HAVE_MALLOC 2331 if (!hci_stack) { 2332 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2333 } 2334 #else 2335 hci_stack = &hci_stack_static; 2336 #endif 2337 memset(hci_stack, 0, sizeof(hci_stack_t)); 2338 2339 // reference to use transport layer implementation 2340 hci_stack->hci_transport = transport; 2341 2342 // reference to used config 2343 hci_stack->config = config; 2344 2345 // setup pointer for outgoing packet buffer 2346 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2347 2348 // max acl payload size defined in config.h 2349 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2350 2351 // register packet handlers with transport 2352 transport->register_packet_handler(&packet_handler); 2353 2354 hci_stack->state = HCI_STATE_OFF; 2355 2356 // class of device 2357 hci_stack->class_of_device = 0x007a020c; // Smartphone 2358 2359 // bondable by default 2360 hci_stack->bondable = 1; 2361 2362 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2363 hci_stack->ssp_enable = 1; 2364 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2365 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2366 hci_stack->ssp_auto_accept = 1; 2367 2368 // voice setting - signed 16 bit pcm data with CVSD over the air 2369 hci_stack->sco_voice_setting = 0x60; 2370 2371 hci_state_reset(); 2372 } 2373 2374 /** 2375 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2376 */ 2377 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2378 hci_stack->chipset = chipset_driver; 2379 2380 // reset chipset driver - init is also called on power_up 2381 if (hci_stack->chipset && hci_stack->chipset->init){ 2382 hci_stack->chipset->init(hci_stack->config); 2383 } 2384 } 2385 2386 /** 2387 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2388 */ 2389 void hci_set_control(const btstack_control_t *hardware_control){ 2390 // references to used control implementation 2391 hci_stack->control = hardware_control; 2392 // init with transport config 2393 hardware_control->init(hci_stack->config); 2394 } 2395 2396 void hci_close(void){ 2397 // close remote device db 2398 if (hci_stack->link_key_db) { 2399 hci_stack->link_key_db->close(); 2400 } 2401 2402 btstack_linked_list_iterator_t lit; 2403 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2404 while (btstack_linked_list_iterator_has_next(&lit)){ 2405 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2406 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2407 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2408 hci_shutdown_connection(connection); 2409 } 2410 2411 hci_power_control(HCI_POWER_OFF); 2412 2413 #ifdef HAVE_MALLOC 2414 free(hci_stack); 2415 #endif 2416 hci_stack = NULL; 2417 } 2418 2419 #ifdef ENABLE_CLASSIC 2420 void gap_set_class_of_device(uint32_t class_of_device){ 2421 hci_stack->class_of_device = class_of_device; 2422 } 2423 2424 void hci_disable_l2cap_timeout_check(void){ 2425 disable_l2cap_timeouts = 1; 2426 } 2427 #endif 2428 2429 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2430 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2431 void hci_set_bd_addr(bd_addr_t addr){ 2432 memcpy(hci_stack->custom_bd_addr, addr, 6); 2433 hci_stack->custom_bd_addr_set = 1; 2434 } 2435 #endif 2436 2437 // State-Module-Driver overview 2438 // state module low-level 2439 // HCI_STATE_OFF off close 2440 // HCI_STATE_INITIALIZING, on open 2441 // HCI_STATE_WORKING, on open 2442 // HCI_STATE_HALTING, on open 2443 // HCI_STATE_SLEEPING, off/sleep close 2444 // HCI_STATE_FALLING_ASLEEP on open 2445 2446 static int hci_power_control_on(void){ 2447 2448 // power on 2449 int err = 0; 2450 if (hci_stack->control && hci_stack->control->on){ 2451 err = (*hci_stack->control->on)(); 2452 } 2453 if (err){ 2454 log_error( "POWER_ON failed"); 2455 hci_emit_hci_open_failed(); 2456 return err; 2457 } 2458 2459 // int chipset driver 2460 if (hci_stack->chipset && hci_stack->chipset->init){ 2461 hci_stack->chipset->init(hci_stack->config); 2462 } 2463 2464 // init transport 2465 if (hci_stack->hci_transport->init){ 2466 hci_stack->hci_transport->init(hci_stack->config); 2467 } 2468 2469 // open transport 2470 err = hci_stack->hci_transport->open(); 2471 if (err){ 2472 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2473 if (hci_stack->control && hci_stack->control->off){ 2474 (*hci_stack->control->off)(); 2475 } 2476 hci_emit_hci_open_failed(); 2477 return err; 2478 } 2479 return 0; 2480 } 2481 2482 static void hci_power_control_off(void){ 2483 2484 log_info("hci_power_control_off"); 2485 2486 // close low-level device 2487 hci_stack->hci_transport->close(); 2488 2489 log_info("hci_power_control_off - hci_transport closed"); 2490 2491 // power off 2492 if (hci_stack->control && hci_stack->control->off){ 2493 (*hci_stack->control->off)(); 2494 } 2495 2496 log_info("hci_power_control_off - control closed"); 2497 2498 hci_stack->state = HCI_STATE_OFF; 2499 } 2500 2501 static void hci_power_control_sleep(void){ 2502 2503 log_info("hci_power_control_sleep"); 2504 2505 #if 0 2506 // don't close serial port during sleep 2507 2508 // close low-level device 2509 hci_stack->hci_transport->close(hci_stack->config); 2510 #endif 2511 2512 // sleep mode 2513 if (hci_stack->control && hci_stack->control->sleep){ 2514 (*hci_stack->control->sleep)(); 2515 } 2516 2517 hci_stack->state = HCI_STATE_SLEEPING; 2518 } 2519 2520 static int hci_power_control_wake(void){ 2521 2522 log_info("hci_power_control_wake"); 2523 2524 // wake on 2525 if (hci_stack->control && hci_stack->control->wake){ 2526 (*hci_stack->control->wake)(); 2527 } 2528 2529 #if 0 2530 // open low-level device 2531 int err = hci_stack->hci_transport->open(hci_stack->config); 2532 if (err){ 2533 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2534 if (hci_stack->control && hci_stack->control->off){ 2535 (*hci_stack->control->off)(); 2536 } 2537 hci_emit_hci_open_failed(); 2538 return err; 2539 } 2540 #endif 2541 2542 return 0; 2543 } 2544 2545 static void hci_power_transition_to_initializing(void){ 2546 // set up state machine 2547 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2548 hci_stack->hci_packet_buffer_reserved = 0; 2549 hci_stack->state = HCI_STATE_INITIALIZING; 2550 hci_stack->substate = HCI_INIT_SEND_RESET; 2551 } 2552 2553 int hci_power_control(HCI_POWER_MODE power_mode){ 2554 2555 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2556 2557 int err = 0; 2558 switch (hci_stack->state){ 2559 2560 case HCI_STATE_OFF: 2561 switch (power_mode){ 2562 case HCI_POWER_ON: 2563 err = hci_power_control_on(); 2564 if (err) { 2565 log_error("hci_power_control_on() error %d", err); 2566 return err; 2567 } 2568 hci_power_transition_to_initializing(); 2569 break; 2570 case HCI_POWER_OFF: 2571 // do nothing 2572 break; 2573 case HCI_POWER_SLEEP: 2574 // do nothing (with SLEEP == OFF) 2575 break; 2576 } 2577 break; 2578 2579 case HCI_STATE_INITIALIZING: 2580 switch (power_mode){ 2581 case HCI_POWER_ON: 2582 // do nothing 2583 break; 2584 case HCI_POWER_OFF: 2585 // no connections yet, just turn it off 2586 hci_power_control_off(); 2587 break; 2588 case HCI_POWER_SLEEP: 2589 // no connections yet, just turn it off 2590 hci_power_control_sleep(); 2591 break; 2592 } 2593 break; 2594 2595 case HCI_STATE_WORKING: 2596 switch (power_mode){ 2597 case HCI_POWER_ON: 2598 // do nothing 2599 break; 2600 case HCI_POWER_OFF: 2601 // see hci_run 2602 hci_stack->state = HCI_STATE_HALTING; 2603 break; 2604 case HCI_POWER_SLEEP: 2605 // see hci_run 2606 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2607 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2608 break; 2609 } 2610 break; 2611 2612 case HCI_STATE_HALTING: 2613 switch (power_mode){ 2614 case HCI_POWER_ON: 2615 hci_power_transition_to_initializing(); 2616 break; 2617 case HCI_POWER_OFF: 2618 // do nothing 2619 break; 2620 case HCI_POWER_SLEEP: 2621 // see hci_run 2622 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2623 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2624 break; 2625 } 2626 break; 2627 2628 case HCI_STATE_FALLING_ASLEEP: 2629 switch (power_mode){ 2630 case HCI_POWER_ON: 2631 2632 #ifdef HAVE_PLATFORM_IPHONE_OS 2633 // nothing to do, if H4 supports power management 2634 if (btstack_control_iphone_power_management_enabled()){ 2635 hci_stack->state = HCI_STATE_INITIALIZING; 2636 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2637 break; 2638 } 2639 #endif 2640 hci_power_transition_to_initializing(); 2641 break; 2642 case HCI_POWER_OFF: 2643 // see hci_run 2644 hci_stack->state = HCI_STATE_HALTING; 2645 break; 2646 case HCI_POWER_SLEEP: 2647 // do nothing 2648 break; 2649 } 2650 break; 2651 2652 case HCI_STATE_SLEEPING: 2653 switch (power_mode){ 2654 case HCI_POWER_ON: 2655 2656 #ifdef HAVE_PLATFORM_IPHONE_OS 2657 // nothing to do, if H4 supports power management 2658 if (btstack_control_iphone_power_management_enabled()){ 2659 hci_stack->state = HCI_STATE_INITIALIZING; 2660 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2661 hci_update_scan_enable(); 2662 break; 2663 } 2664 #endif 2665 err = hci_power_control_wake(); 2666 if (err) return err; 2667 hci_power_transition_to_initializing(); 2668 break; 2669 case HCI_POWER_OFF: 2670 hci_stack->state = HCI_STATE_HALTING; 2671 break; 2672 case HCI_POWER_SLEEP: 2673 // do nothing 2674 break; 2675 } 2676 break; 2677 } 2678 2679 // create internal event 2680 hci_emit_state(); 2681 2682 // trigger next/first action 2683 hci_run(); 2684 2685 return 0; 2686 } 2687 2688 2689 #ifdef ENABLE_CLASSIC 2690 2691 static void hci_update_scan_enable(void){ 2692 // 2 = page scan, 1 = inq scan 2693 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2694 hci_run(); 2695 } 2696 2697 void gap_discoverable_control(uint8_t enable){ 2698 if (enable) enable = 1; // normalize argument 2699 2700 if (hci_stack->discoverable == enable){ 2701 hci_emit_discoverable_enabled(hci_stack->discoverable); 2702 return; 2703 } 2704 2705 hci_stack->discoverable = enable; 2706 hci_update_scan_enable(); 2707 } 2708 2709 void gap_connectable_control(uint8_t enable){ 2710 if (enable) enable = 1; // normalize argument 2711 2712 // don't emit event 2713 if (hci_stack->connectable == enable) return; 2714 2715 hci_stack->connectable = enable; 2716 hci_update_scan_enable(); 2717 } 2718 #endif 2719 2720 void gap_local_bd_addr(bd_addr_t address_buffer){ 2721 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2722 } 2723 2724 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2725 static void hci_host_num_completed_packets(void){ 2726 2727 // create packet manually as arrays are not supported and num_commands should not get reduced 2728 hci_reserve_packet_buffer(); 2729 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2730 2731 uint16_t size = 0; 2732 uint16_t num_handles = 0; 2733 packet[size++] = 0x35; 2734 packet[size++] = 0x0c; 2735 size++; // skip param len 2736 size++; // skip num handles 2737 2738 // add { handle, packets } entries 2739 btstack_linked_item_t * it; 2740 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2741 hci_connection_t * connection = (hci_connection_t *) it; 2742 if (connection->num_packets_completed){ 2743 little_endian_store_16(packet, size, connection->con_handle); 2744 size += 2; 2745 little_endian_store_16(packet, size, connection->num_packets_completed); 2746 size += 2; 2747 // 2748 num_handles++; 2749 connection->num_packets_completed = 0; 2750 } 2751 } 2752 2753 packet[2] = size - 3; 2754 packet[3] = num_handles; 2755 2756 hci_stack->host_completed_packets = 0; 2757 2758 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2759 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2760 2761 // release packet buffer for synchronous transport implementations 2762 if (hci_transport_synchronous()){ 2763 hci_stack->hci_packet_buffer_reserved = 0; 2764 } 2765 } 2766 #endif 2767 2768 static void hci_run(void){ 2769 2770 // log_info("hci_run: entered"); 2771 btstack_linked_item_t * it; 2772 2773 // send continuation fragments first, as they block the prepared packet buffer 2774 if (hci_stack->acl_fragmentation_total_size > 0) { 2775 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2776 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2777 if (connection) { 2778 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2779 hci_send_acl_packet_fragments(connection); 2780 return; 2781 } 2782 } else { 2783 // connection gone -> discard further fragments 2784 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2785 hci_stack->acl_fragmentation_total_size = 0; 2786 hci_stack->acl_fragmentation_pos = 0; 2787 } 2788 } 2789 2790 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2791 // send host num completed packets next as they don't require num_cmd_packets > 0 2792 if (!hci_can_send_comand_packet_transport()) return; 2793 if (hci_stack->host_completed_packets){ 2794 hci_host_num_completed_packets(); 2795 return; 2796 } 2797 #endif 2798 2799 if (!hci_can_send_command_packet_now()) return; 2800 2801 // global/non-connection oriented commands 2802 2803 #ifdef ENABLE_CLASSIC 2804 // decline incoming connections 2805 if (hci_stack->decline_reason){ 2806 uint8_t reason = hci_stack->decline_reason; 2807 hci_stack->decline_reason = 0; 2808 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2809 return; 2810 } 2811 // send scan enable 2812 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2813 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2814 hci_stack->new_scan_enable_value = 0xff; 2815 return; 2816 } 2817 // start/stop inquiry 2818 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2819 uint8_t duration = hci_stack->inquiry_state; 2820 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2821 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2822 return; 2823 } 2824 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2825 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2826 hci_send_cmd(&hci_inquiry_cancel); 2827 return; 2828 } 2829 // remote name request 2830 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2831 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2832 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2833 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2834 return; 2835 } 2836 // pairing 2837 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2838 uint8_t state = hci_stack->gap_pairing_state; 2839 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2840 switch (state){ 2841 case GAP_PAIRING_STATE_SEND_PIN: 2842 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2843 break; 2844 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2845 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2846 break; 2847 case GAP_PAIRING_STATE_SEND_PASSKEY: 2848 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2849 break; 2850 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2851 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2852 break; 2853 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2854 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2855 break; 2856 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2857 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2858 break; 2859 default: 2860 break; 2861 } 2862 return; 2863 } 2864 #endif 2865 2866 #ifdef ENABLE_BLE 2867 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2868 if ((hci_stack->state == HCI_STATE_WORKING) 2869 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2870 2871 #ifdef ENABLE_LE_CENTRAL 2872 // handle le scan 2873 switch(hci_stack->le_scanning_state){ 2874 case LE_START_SCAN: 2875 hci_stack->le_scanning_state = LE_SCANNING; 2876 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2877 return; 2878 2879 case LE_STOP_SCAN: 2880 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2881 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2882 return; 2883 default: 2884 break; 2885 } 2886 if (hci_stack->le_scan_type != 0xff){ 2887 // defaults: active scanning, accept all advertisement packets 2888 int scan_type = hci_stack->le_scan_type; 2889 hci_stack->le_scan_type = 0xff; 2890 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); 2891 return; 2892 } 2893 #endif 2894 #ifdef ENABLE_LE_PERIPHERAL 2895 // le advertisement control 2896 if (hci_stack->le_advertisements_todo){ 2897 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2898 } 2899 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2900 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2901 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2902 return; 2903 } 2904 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2905 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2906 hci_send_cmd(&hci_le_set_advertising_parameters, 2907 hci_stack->le_advertisements_interval_min, 2908 hci_stack->le_advertisements_interval_max, 2909 hci_stack->le_advertisements_type, 2910 hci_stack->le_own_addr_type, 2911 hci_stack->le_advertisements_direct_address_type, 2912 hci_stack->le_advertisements_direct_address, 2913 hci_stack->le_advertisements_channel_map, 2914 hci_stack->le_advertisements_filter_policy); 2915 return; 2916 } 2917 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2918 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2919 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2920 return; 2921 } 2922 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2923 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2924 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2925 hci_stack->le_scan_response_data); 2926 return; 2927 } 2928 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2929 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2930 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2931 return; 2932 } 2933 #endif 2934 2935 #ifdef ENABLE_LE_CENTRAL 2936 // 2937 // LE Whitelist Management 2938 // 2939 2940 // check if whitelist needs modification 2941 btstack_linked_list_iterator_t lit; 2942 int modification_pending = 0; 2943 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2944 while (btstack_linked_list_iterator_has_next(&lit)){ 2945 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2946 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2947 modification_pending = 1; 2948 break; 2949 } 2950 } 2951 2952 if (modification_pending){ 2953 // stop connnecting if modification pending 2954 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2955 hci_send_cmd(&hci_le_create_connection_cancel); 2956 return; 2957 } 2958 2959 // add/remove entries 2960 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2961 while (btstack_linked_list_iterator_has_next(&lit)){ 2962 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2963 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2964 entry->state = LE_WHITELIST_ON_CONTROLLER; 2965 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2966 return; 2967 2968 } 2969 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2970 bd_addr_t address; 2971 bd_addr_type_t address_type = entry->address_type; 2972 memcpy(address, entry->address, 6); 2973 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2974 btstack_memory_whitelist_entry_free(entry); 2975 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2976 return; 2977 } 2978 } 2979 } 2980 2981 // start connecting 2982 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2983 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2984 bd_addr_t null_addr; 2985 memset(null_addr, 0, 6); 2986 hci_send_cmd(&hci_le_create_connection, 2987 0x0060, // scan interval: 60 ms 2988 0x0030, // scan interval: 30 ms 2989 1, // use whitelist 2990 0, // peer address type 2991 null_addr, // peer bd addr 2992 hci_stack->le_own_addr_type, // our addr type: 2993 hci_stack->le_connection_interval_min, // conn interval min 2994 hci_stack->le_connection_interval_max, // conn interval max 2995 hci_stack->le_connection_latency, // conn latency 2996 hci_stack->le_supervision_timeout, // conn latency 2997 hci_stack->le_minimum_ce_length, // min ce length 2998 hci_stack->le_maximum_ce_length // max ce length 2999 ); 3000 return; 3001 } 3002 #endif 3003 } 3004 #endif 3005 3006 // send pending HCI commands 3007 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3008 hci_connection_t * connection = (hci_connection_t *) it; 3009 3010 switch(connection->state){ 3011 case SEND_CREATE_CONNECTION: 3012 switch(connection->address_type){ 3013 #ifdef ENABLE_CLASSIC 3014 case BD_ADDR_TYPE_CLASSIC: 3015 log_info("sending hci_create_connection"); 3016 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3017 break; 3018 #endif 3019 default: 3020 #ifdef ENABLE_BLE 3021 #ifdef ENABLE_LE_CENTRAL 3022 log_info("sending hci_le_create_connection"); 3023 hci_send_cmd(&hci_le_create_connection, 3024 0x0060, // scan interval: 60 ms 3025 0x0030, // scan interval: 30 ms 3026 0, // don't use whitelist 3027 connection->address_type, // peer address type 3028 connection->address, // peer bd addr 3029 hci_stack->le_own_addr_type, // our addr type: 3030 hci_stack->le_connection_interval_min, // conn interval min 3031 hci_stack->le_connection_interval_max, // conn interval max 3032 hci_stack->le_connection_latency, // conn latency 3033 hci_stack->le_supervision_timeout, // conn latency 3034 hci_stack->le_minimum_ce_length, // min ce length 3035 hci_stack->le_maximum_ce_length // max ce length 3036 ); 3037 connection->state = SENT_CREATE_CONNECTION; 3038 #endif 3039 #endif 3040 break; 3041 } 3042 return; 3043 3044 #ifdef ENABLE_CLASSIC 3045 case RECEIVED_CONNECTION_REQUEST: 3046 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3047 connection->state = ACCEPTED_CONNECTION_REQUEST; 3048 connection->role = HCI_ROLE_SLAVE; 3049 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3050 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3051 } 3052 return; 3053 #endif 3054 3055 #ifdef ENABLE_BLE 3056 #ifdef ENABLE_LE_CENTRAL 3057 case SEND_CANCEL_CONNECTION: 3058 connection->state = SENT_CANCEL_CONNECTION; 3059 hci_send_cmd(&hci_le_create_connection_cancel); 3060 return; 3061 #endif 3062 #endif 3063 case SEND_DISCONNECT: 3064 connection->state = SENT_DISCONNECT; 3065 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3066 return; 3067 3068 default: 3069 break; 3070 } 3071 3072 #ifdef ENABLE_CLASSIC 3073 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3074 log_info("responding to link key request"); 3075 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3076 link_key_t link_key; 3077 link_key_type_t link_key_type; 3078 if ( hci_stack->link_key_db 3079 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3080 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3081 connection->link_key_type = link_key_type; 3082 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3083 } else { 3084 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3085 } 3086 return; 3087 } 3088 3089 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3090 log_info("denying to pin request"); 3091 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3092 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3093 return; 3094 } 3095 3096 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3097 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3098 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3099 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3100 // tweak authentication requirements 3101 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3102 if (connection->bonding_flags & BONDING_DEDICATED){ 3103 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3104 } 3105 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3106 authreq |= 1; 3107 } 3108 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3109 } else { 3110 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3111 } 3112 return; 3113 } 3114 3115 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3116 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3117 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3118 return; 3119 } 3120 3121 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3122 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3123 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3124 return; 3125 } 3126 3127 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3128 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3129 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3130 return; 3131 } 3132 3133 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3134 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3135 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3136 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3137 return; 3138 } 3139 3140 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3141 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3142 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3143 return; 3144 } 3145 3146 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3147 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3148 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3149 return; 3150 } 3151 #endif 3152 3153 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3154 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3155 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3156 return; 3157 } 3158 3159 #ifdef ENABLE_BLE 3160 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3161 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3162 3163 uint16_t connection_interval_min = connection->le_conn_interval_min; 3164 connection->le_conn_interval_min = 0; 3165 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3166 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3167 0x0000, 0xffff); 3168 } 3169 #endif 3170 } 3171 3172 hci_connection_t * connection; 3173 switch (hci_stack->state){ 3174 case HCI_STATE_INITIALIZING: 3175 hci_initializing_run(); 3176 break; 3177 3178 case HCI_STATE_HALTING: 3179 3180 log_info("HCI_STATE_HALTING"); 3181 3182 // free whitelist entries 3183 #ifdef ENABLE_BLE 3184 #ifdef ENABLE_LE_CENTRAL 3185 { 3186 btstack_linked_list_iterator_t lit; 3187 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3188 while (btstack_linked_list_iterator_has_next(&lit)){ 3189 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3190 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3191 btstack_memory_whitelist_entry_free(entry); 3192 } 3193 } 3194 #endif 3195 #endif 3196 // close all open connections 3197 connection = (hci_connection_t *) hci_stack->connections; 3198 if (connection){ 3199 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3200 if (!hci_can_send_command_packet_now()) return; 3201 3202 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3203 3204 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3205 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3206 3207 // ... which would be ignored anyway as we shutdown (free) the connection now 3208 hci_shutdown_connection(connection); 3209 3210 // finally, send the disconnect command 3211 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3212 return; 3213 } 3214 log_info("HCI_STATE_HALTING, calling off"); 3215 3216 // switch mode 3217 hci_power_control_off(); 3218 3219 log_info("HCI_STATE_HALTING, emitting state"); 3220 hci_emit_state(); 3221 log_info("HCI_STATE_HALTING, done"); 3222 break; 3223 3224 case HCI_STATE_FALLING_ASLEEP: 3225 switch(hci_stack->substate) { 3226 case HCI_FALLING_ASLEEP_DISCONNECT: 3227 log_info("HCI_STATE_FALLING_ASLEEP"); 3228 // close all open connections 3229 connection = (hci_connection_t *) hci_stack->connections; 3230 3231 #ifdef HAVE_PLATFORM_IPHONE_OS 3232 // don't close connections, if H4 supports power management 3233 if (btstack_control_iphone_power_management_enabled()){ 3234 connection = NULL; 3235 } 3236 #endif 3237 if (connection){ 3238 3239 // send disconnect 3240 if (!hci_can_send_command_packet_now()) return; 3241 3242 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3243 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3244 3245 // send disconnected event right away - causes higher layer connections to get closed, too. 3246 hci_shutdown_connection(connection); 3247 return; 3248 } 3249 3250 if (hci_classic_supported()){ 3251 // disable page and inquiry scan 3252 if (!hci_can_send_command_packet_now()) return; 3253 3254 log_info("HCI_STATE_HALTING, disabling inq scans"); 3255 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3256 3257 // continue in next sub state 3258 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3259 break; 3260 } 3261 // no break - fall through for ble-only chips 3262 3263 case HCI_FALLING_ASLEEP_COMPLETE: 3264 log_info("HCI_STATE_HALTING, calling sleep"); 3265 #ifdef HAVE_PLATFORM_IPHONE_OS 3266 // don't actually go to sleep, if H4 supports power management 3267 if (btstack_control_iphone_power_management_enabled()){ 3268 // SLEEP MODE reached 3269 hci_stack->state = HCI_STATE_SLEEPING; 3270 hci_emit_state(); 3271 break; 3272 } 3273 #endif 3274 // switch mode 3275 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3276 hci_emit_state(); 3277 break; 3278 3279 default: 3280 break; 3281 } 3282 break; 3283 3284 default: 3285 break; 3286 } 3287 } 3288 3289 int hci_send_cmd_packet(uint8_t *packet, int size){ 3290 // house-keeping 3291 3292 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3293 hci_stack->loopback_mode = packet[3]; 3294 } 3295 3296 #ifdef ENABLE_CLASSIC 3297 bd_addr_t addr; 3298 hci_connection_t * conn; 3299 3300 // create_connection? 3301 if (IS_COMMAND(packet, hci_create_connection)){ 3302 reverse_bd_addr(&packet[3], addr); 3303 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3304 3305 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3306 if (!conn){ 3307 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3308 if (!conn){ 3309 // notify client that alloc failed 3310 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3311 return 0; // don't sent packet to controller 3312 } 3313 conn->state = SEND_CREATE_CONNECTION; 3314 } 3315 log_info("conn state %u", conn->state); 3316 switch (conn->state){ 3317 // if connection active exists 3318 case OPEN: 3319 // and OPEN, emit connection complete command, don't send to controller 3320 hci_emit_connection_complete(addr, conn->con_handle, 0); 3321 return 0; 3322 case SEND_CREATE_CONNECTION: 3323 // connection created by hci, e.g. dedicated bonding 3324 break; 3325 default: 3326 // otherwise, just ignore as it is already in the open process 3327 return 0; 3328 } 3329 conn->state = SENT_CREATE_CONNECTION; 3330 } 3331 3332 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3333 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3334 } 3335 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3336 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3337 } 3338 3339 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3340 if (hci_stack->link_key_db){ 3341 reverse_bd_addr(&packet[3], addr); 3342 hci_stack->link_key_db->delete_link_key(addr); 3343 } 3344 } 3345 3346 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3347 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3348 reverse_bd_addr(&packet[3], addr); 3349 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3350 if (conn){ 3351 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3352 } 3353 } 3354 3355 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3356 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3357 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3358 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3359 reverse_bd_addr(&packet[3], addr); 3360 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3361 if (conn){ 3362 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3363 } 3364 } 3365 3366 #ifdef ENABLE_SCO_OVER_HCI 3367 // setup_synchronous_connection? Voice setting at offset 22 3368 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3369 // TODO: compare to current setting if sco connection already active 3370 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3371 } 3372 // accept_synchronus_connection? Voice setting at offset 18 3373 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3374 // TODO: compare to current setting if sco connection already active 3375 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3376 } 3377 #endif 3378 #endif 3379 3380 #ifdef ENABLE_BLE 3381 #ifdef ENABLE_LE_PERIPHERAL 3382 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3383 hci_stack->le_random_address_set = 1; 3384 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3385 } 3386 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3387 hci_stack->le_advertisements_active = packet[3]; 3388 } 3389 #endif 3390 #ifdef ENABLE_LE_CENTRAL 3391 if (IS_COMMAND(packet, hci_le_create_connection)){ 3392 // white list used? 3393 uint8_t initiator_filter_policy = packet[7]; 3394 switch (initiator_filter_policy){ 3395 case 0: 3396 // whitelist not used 3397 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3398 break; 3399 case 1: 3400 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3401 break; 3402 default: 3403 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3404 break; 3405 } 3406 } 3407 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3408 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3409 } 3410 #endif 3411 #endif 3412 3413 hci_stack->num_cmd_packets--; 3414 3415 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3416 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3417 3418 // release packet buffer for synchronous transport implementations 3419 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3420 hci_stack->hci_packet_buffer_reserved = 0; 3421 } 3422 3423 return err; 3424 } 3425 3426 // disconnect because of security block 3427 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3428 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3429 if (!connection) return; 3430 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3431 } 3432 3433 3434 // Configure Secure Simple Pairing 3435 3436 #ifdef ENABLE_CLASSIC 3437 3438 // enable will enable SSP during init 3439 void gap_ssp_set_enable(int enable){ 3440 hci_stack->ssp_enable = enable; 3441 } 3442 3443 static int hci_local_ssp_activated(void){ 3444 return gap_ssp_supported() && hci_stack->ssp_enable; 3445 } 3446 3447 // if set, BTstack will respond to io capability request using authentication requirement 3448 void gap_ssp_set_io_capability(int io_capability){ 3449 hci_stack->ssp_io_capability = io_capability; 3450 } 3451 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3452 hci_stack->ssp_authentication_requirement = authentication_requirement; 3453 } 3454 3455 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3456 void gap_ssp_set_auto_accept(int auto_accept){ 3457 hci_stack->ssp_auto_accept = auto_accept; 3458 } 3459 #endif 3460 3461 // va_list part of hci_send_cmd 3462 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3463 if (!hci_can_send_command_packet_now()){ 3464 log_error("hci_send_cmd called but cannot send packet now"); 3465 return 0; 3466 } 3467 3468 // for HCI INITIALIZATION 3469 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3470 hci_stack->last_cmd_opcode = cmd->opcode; 3471 3472 hci_reserve_packet_buffer(); 3473 uint8_t * packet = hci_stack->hci_packet_buffer; 3474 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3475 return hci_send_cmd_packet(packet, size); 3476 } 3477 3478 /** 3479 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3480 */ 3481 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3482 va_list argptr; 3483 va_start(argptr, cmd); 3484 int res = hci_send_cmd_va_arg(cmd, argptr); 3485 va_end(argptr); 3486 return res; 3487 } 3488 3489 // Create various non-HCI events. 3490 // TODO: generalize, use table similar to hci_create_command 3491 3492 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3493 // dump packet 3494 if (dump) { 3495 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3496 } 3497 3498 // dispatch to all event handlers 3499 btstack_linked_list_iterator_t it; 3500 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3501 while (btstack_linked_list_iterator_has_next(&it)){ 3502 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3503 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3504 } 3505 } 3506 3507 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3508 if (!hci_stack->acl_packet_handler) return; 3509 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3510 } 3511 3512 #ifdef ENABLE_CLASSIC 3513 static void hci_notify_if_sco_can_send_now(void){ 3514 // notify SCO sender if waiting 3515 if (!hci_stack->sco_waiting_for_can_send_now) return; 3516 if (hci_can_send_sco_packet_now()){ 3517 hci_stack->sco_waiting_for_can_send_now = 0; 3518 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3519 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3520 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3521 } 3522 } 3523 3524 // parsing end emitting has been merged to reduce code size 3525 static void gap_inquiry_explode(uint8_t * packet){ 3526 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3527 3528 uint8_t * eir_data; 3529 ad_context_t context; 3530 const uint8_t * name; 3531 uint8_t name_len; 3532 3533 int event_type = hci_event_packet_get_type(packet); 3534 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3535 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3536 3537 // event[1] is set at the end 3538 int i; 3539 for (i=0; i<num_responses;i++){ 3540 memset(event, 0, sizeof(event)); 3541 event[0] = GAP_EVENT_INQUIRY_RESULT; 3542 uint8_t event_size = 18; // if name is not set by EIR 3543 3544 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3545 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3546 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3547 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3548 3549 switch (event_type){ 3550 case HCI_EVENT_INQUIRY_RESULT: 3551 // 14,15,16,17 = 0, size 18 3552 break; 3553 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3554 event[14] = 1; 3555 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3556 // 16,17 = 0, size 18 3557 break; 3558 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3559 event[14] = 1; 3560 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3561 // for EIR packets, there is only one reponse in it 3562 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3563 name = NULL; 3564 // EIR data is 240 bytes in EIR event 3565 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3566 uint8_t data_type = ad_iterator_get_data_type(&context); 3567 uint8_t data_size = ad_iterator_get_data_len(&context); 3568 const uint8_t * data = ad_iterator_get_data(&context); 3569 // Prefer Complete Local Name over Shortend Local Name 3570 switch (data_type){ 3571 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3572 if (name) continue; 3573 /* explicit fall-through */ 3574 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3575 name = data; 3576 name_len = data_size; 3577 break; 3578 default: 3579 break; 3580 } 3581 } 3582 if (name){ 3583 event[16] = 1; 3584 // truncate name if needed 3585 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3586 event[17] = len; 3587 memcpy(&event[18], name, len); 3588 event_size += len; 3589 } 3590 break; 3591 } 3592 event[1] = event_size - 2; 3593 hci_emit_event(event, event_size, 1); 3594 } 3595 } 3596 #endif 3597 3598 void hci_emit_state(void){ 3599 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3600 uint8_t event[3]; 3601 event[0] = BTSTACK_EVENT_STATE; 3602 event[1] = sizeof(event) - 2; 3603 event[2] = hci_stack->state; 3604 hci_emit_event(event, sizeof(event), 1); 3605 } 3606 3607 #ifdef ENABLE_CLASSIC 3608 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3609 uint8_t event[13]; 3610 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3611 event[1] = sizeof(event) - 2; 3612 event[2] = status; 3613 little_endian_store_16(event, 3, con_handle); 3614 reverse_bd_addr(address, &event[5]); 3615 event[11] = 1; // ACL connection 3616 event[12] = 0; // encryption disabled 3617 hci_emit_event(event, sizeof(event), 1); 3618 } 3619 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3620 if (disable_l2cap_timeouts) return; 3621 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3622 uint8_t event[4]; 3623 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3624 event[1] = sizeof(event) - 2; 3625 little_endian_store_16(event, 2, conn->con_handle); 3626 hci_emit_event(event, sizeof(event), 1); 3627 } 3628 #endif 3629 3630 #ifdef ENABLE_BLE 3631 #ifdef ENABLE_LE_CENTRAL 3632 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3633 uint8_t event[21]; 3634 event[0] = HCI_EVENT_LE_META; 3635 event[1] = sizeof(event) - 2; 3636 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3637 event[3] = status; 3638 little_endian_store_16(event, 4, con_handle); 3639 event[6] = 0; // TODO: role 3640 event[7] = address_type; 3641 reverse_bd_addr(address, &event[8]); 3642 little_endian_store_16(event, 14, 0); // interval 3643 little_endian_store_16(event, 16, 0); // latency 3644 little_endian_store_16(event, 18, 0); // supervision timeout 3645 event[20] = 0; // master clock accuracy 3646 hci_emit_event(event, sizeof(event), 1); 3647 } 3648 #endif 3649 #endif 3650 3651 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3652 uint8_t event[6]; 3653 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3654 event[1] = sizeof(event) - 2; 3655 event[2] = 0; // status = OK 3656 little_endian_store_16(event, 3, con_handle); 3657 event[5] = reason; 3658 hci_emit_event(event, sizeof(event), 1); 3659 } 3660 3661 static void hci_emit_nr_connections_changed(void){ 3662 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3663 uint8_t event[3]; 3664 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3665 event[1] = sizeof(event) - 2; 3666 event[2] = nr_hci_connections(); 3667 hci_emit_event(event, sizeof(event), 1); 3668 } 3669 3670 static void hci_emit_hci_open_failed(void){ 3671 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3672 uint8_t event[2]; 3673 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3674 event[1] = sizeof(event) - 2; 3675 hci_emit_event(event, sizeof(event), 1); 3676 } 3677 3678 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3679 log_info("hci_emit_dedicated_bonding_result %u ", status); 3680 uint8_t event[9]; 3681 int pos = 0; 3682 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3683 event[pos++] = sizeof(event) - 2; 3684 event[pos++] = status; 3685 reverse_bd_addr(address, &event[pos]); 3686 hci_emit_event(event, sizeof(event), 1); 3687 } 3688 3689 3690 #ifdef ENABLE_CLASSIC 3691 3692 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3693 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3694 uint8_t event[5]; 3695 int pos = 0; 3696 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3697 event[pos++] = sizeof(event) - 2; 3698 little_endian_store_16(event, 2, con_handle); 3699 pos += 2; 3700 event[pos++] = level; 3701 hci_emit_event(event, sizeof(event), 1); 3702 } 3703 3704 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3705 if (!connection) return LEVEL_0; 3706 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3707 return gap_security_level_for_link_key_type(connection->link_key_type); 3708 } 3709 3710 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3711 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3712 uint8_t event[3]; 3713 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3714 event[1] = sizeof(event) - 2; 3715 event[2] = enabled; 3716 hci_emit_event(event, sizeof(event), 1); 3717 } 3718 3719 #ifdef ENABLE_CLASSIC 3720 // query if remote side supports eSCO 3721 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3722 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3723 if (!connection) return 0; 3724 return connection->remote_supported_feature_eSCO; 3725 } 3726 3727 // query if remote side supports SSP 3728 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3729 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3730 if (!connection) return 0; 3731 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3732 } 3733 3734 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3735 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3736 } 3737 #endif 3738 3739 // GAP API 3740 /** 3741 * @bbrief enable/disable bonding. default is enabled 3742 * @praram enabled 3743 */ 3744 void gap_set_bondable_mode(int enable){ 3745 hci_stack->bondable = enable ? 1 : 0; 3746 } 3747 /** 3748 * @brief Get bondable mode. 3749 * @return 1 if bondable 3750 */ 3751 int gap_get_bondable_mode(void){ 3752 return hci_stack->bondable; 3753 } 3754 3755 /** 3756 * @brief map link keys to security levels 3757 */ 3758 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3759 switch (link_key_type){ 3760 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3761 return LEVEL_4; 3762 case COMBINATION_KEY: 3763 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3764 return LEVEL_3; 3765 default: 3766 return LEVEL_2; 3767 } 3768 } 3769 3770 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3771 log_info("gap_mitm_protection_required_for_security_level %u", level); 3772 return level > LEVEL_2; 3773 } 3774 3775 /** 3776 * @brief get current security level 3777 */ 3778 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3779 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3780 if (!connection) return LEVEL_0; 3781 return gap_security_level_for_connection(connection); 3782 } 3783 3784 /** 3785 * @brief request connection to device to 3786 * @result GAP_AUTHENTICATION_RESULT 3787 */ 3788 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3789 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3790 if (!connection){ 3791 hci_emit_security_level(con_handle, LEVEL_0); 3792 return; 3793 } 3794 gap_security_level_t current_level = gap_security_level(con_handle); 3795 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3796 if (current_level >= requested_level){ 3797 hci_emit_security_level(con_handle, current_level); 3798 return; 3799 } 3800 3801 connection->requested_security_level = requested_level; 3802 3803 #if 0 3804 // sending encryption request without a link key results in an error. 3805 // TODO: figure out how to use it properly 3806 3807 // would enabling ecnryption suffice (>= LEVEL_2)? 3808 if (hci_stack->link_key_db){ 3809 link_key_type_t link_key_type; 3810 link_key_t link_key; 3811 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3812 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3813 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3814 return; 3815 } 3816 } 3817 } 3818 #endif 3819 3820 // try to authenticate connection 3821 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3822 hci_run(); 3823 } 3824 3825 /** 3826 * @brief start dedicated bonding with device. disconnect after bonding 3827 * @param device 3828 * @param request MITM protection 3829 * @result GAP_DEDICATED_BONDING_COMPLETE 3830 */ 3831 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3832 3833 // create connection state machine 3834 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3835 3836 if (!connection){ 3837 return BTSTACK_MEMORY_ALLOC_FAILED; 3838 } 3839 3840 // delete linkn key 3841 gap_drop_link_key_for_bd_addr(device); 3842 3843 // configure LEVEL_2/3, dedicated bonding 3844 connection->state = SEND_CREATE_CONNECTION; 3845 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3846 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3847 connection->bonding_flags = BONDING_DEDICATED; 3848 3849 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3850 3851 // handle: connnection failure (connection complete != ok) 3852 // handle: authentication failure 3853 // handle: disconnect on done 3854 3855 hci_run(); 3856 3857 return 0; 3858 } 3859 #endif 3860 3861 void gap_set_local_name(const char * local_name){ 3862 hci_stack->local_name = local_name; 3863 } 3864 3865 3866 #ifdef ENABLE_BLE 3867 3868 #ifdef ENABLE_LE_CENTRAL 3869 void gap_start_scan(void){ 3870 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3871 hci_stack->le_scanning_state = LE_START_SCAN; 3872 hci_run(); 3873 } 3874 3875 void gap_stop_scan(void){ 3876 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3877 hci_stack->le_scanning_state = LE_STOP_SCAN; 3878 hci_run(); 3879 } 3880 3881 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3882 hci_stack->le_scan_type = scan_type; 3883 hci_stack->le_scan_interval = scan_interval; 3884 hci_stack->le_scan_window = scan_window; 3885 hci_run(); 3886 } 3887 3888 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3889 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3890 if (!conn){ 3891 log_info("gap_connect: no connection exists yet, creating context"); 3892 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3893 if (!conn){ 3894 // notify client that alloc failed 3895 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3896 log_info("gap_connect: failed to alloc hci_connection_t"); 3897 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3898 } 3899 conn->state = SEND_CREATE_CONNECTION; 3900 log_info("gap_connect: send create connection next"); 3901 hci_run(); 3902 return 0; 3903 } 3904 3905 if (!hci_is_le_connection(conn) || 3906 conn->state == SEND_CREATE_CONNECTION || 3907 conn->state == SENT_CREATE_CONNECTION) { 3908 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3909 log_error("gap_connect: classic connection or connect is already being created"); 3910 return GATT_CLIENT_IN_WRONG_STATE; 3911 } 3912 3913 log_info("gap_connect: context exists with state %u", conn->state); 3914 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3915 hci_run(); 3916 return 0; 3917 } 3918 3919 // @assumption: only a single outgoing LE Connection exists 3920 static hci_connection_t * gap_get_outgoing_connection(void){ 3921 btstack_linked_item_t *it; 3922 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3923 hci_connection_t * conn = (hci_connection_t *) it; 3924 if (!hci_is_le_connection(conn)) continue; 3925 switch (conn->state){ 3926 case SEND_CREATE_CONNECTION: 3927 case SENT_CREATE_CONNECTION: 3928 return conn; 3929 default: 3930 break; 3931 }; 3932 } 3933 return NULL; 3934 } 3935 3936 uint8_t gap_connect_cancel(void){ 3937 hci_connection_t * conn = gap_get_outgoing_connection(); 3938 if (!conn) return 0; 3939 switch (conn->state){ 3940 case SEND_CREATE_CONNECTION: 3941 // skip sending create connection and emit event instead 3942 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3943 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3944 btstack_memory_hci_connection_free( conn ); 3945 break; 3946 case SENT_CREATE_CONNECTION: 3947 // request to send cancel connection 3948 conn->state = SEND_CANCEL_CONNECTION; 3949 hci_run(); 3950 break; 3951 default: 3952 break; 3953 } 3954 return 0; 3955 } 3956 #endif 3957 3958 /** 3959 * @brief Updates the connection parameters for a given LE connection 3960 * @param handle 3961 * @param conn_interval_min (unit: 1.25ms) 3962 * @param conn_interval_max (unit: 1.25ms) 3963 * @param conn_latency 3964 * @param supervision_timeout (unit: 10ms) 3965 * @returns 0 if ok 3966 */ 3967 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3968 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3969 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3970 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3971 connection->le_conn_interval_min = conn_interval_min; 3972 connection->le_conn_interval_max = conn_interval_max; 3973 connection->le_conn_latency = conn_latency; 3974 connection->le_supervision_timeout = supervision_timeout; 3975 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3976 hci_run(); 3977 return 0; 3978 } 3979 3980 /** 3981 * @brief Request an update of the connection parameter for a given LE connection 3982 * @param handle 3983 * @param conn_interval_min (unit: 1.25ms) 3984 * @param conn_interval_max (unit: 1.25ms) 3985 * @param conn_latency 3986 * @param supervision_timeout (unit: 10ms) 3987 * @returns 0 if ok 3988 */ 3989 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3990 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3991 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3992 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3993 connection->le_conn_interval_min = conn_interval_min; 3994 connection->le_conn_interval_max = conn_interval_max; 3995 connection->le_conn_latency = conn_latency; 3996 connection->le_supervision_timeout = supervision_timeout; 3997 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3998 hci_run(); 3999 return 0; 4000 } 4001 4002 #ifdef ENABLE_LE_PERIPHERAL 4003 4004 static void gap_advertisments_changed(void){ 4005 // disable advertisements before updating adv, scan data, or adv params 4006 if (hci_stack->le_advertisements_active){ 4007 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4008 } 4009 hci_run(); 4010 } 4011 4012 /** 4013 * @brief Set Advertisement Data 4014 * @param advertising_data_length 4015 * @param advertising_data (max 31 octets) 4016 * @note data is not copied, pointer has to stay valid 4017 */ 4018 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4019 hci_stack->le_advertisements_data_len = advertising_data_length; 4020 hci_stack->le_advertisements_data = advertising_data; 4021 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4022 gap_advertisments_changed(); 4023 } 4024 4025 /** 4026 * @brief Set Scan Response Data 4027 * @param advertising_data_length 4028 * @param advertising_data (max 31 octets) 4029 * @note data is not copied, pointer has to stay valid 4030 */ 4031 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4032 hci_stack->le_scan_response_data_len = scan_response_data_length; 4033 hci_stack->le_scan_response_data = scan_response_data; 4034 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4035 gap_advertisments_changed(); 4036 } 4037 4038 /** 4039 * @brief Set Advertisement Parameters 4040 * @param adv_int_min 4041 * @param adv_int_max 4042 * @param adv_type 4043 * @param direct_address_type 4044 * @param direct_address 4045 * @param channel_map 4046 * @param filter_policy 4047 * 4048 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4049 */ 4050 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4051 uint8_t direct_address_typ, bd_addr_t direct_address, 4052 uint8_t channel_map, uint8_t filter_policy) { 4053 4054 hci_stack->le_advertisements_interval_min = adv_int_min; 4055 hci_stack->le_advertisements_interval_max = adv_int_max; 4056 hci_stack->le_advertisements_type = adv_type; 4057 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4058 hci_stack->le_advertisements_channel_map = channel_map; 4059 hci_stack->le_advertisements_filter_policy = filter_policy; 4060 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4061 4062 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4063 gap_advertisments_changed(); 4064 } 4065 4066 /** 4067 * @brief Enable/Disable Advertisements 4068 * @param enabled 4069 */ 4070 void gap_advertisements_enable(int enabled){ 4071 hci_stack->le_advertisements_enabled = enabled; 4072 if (enabled && !hci_stack->le_advertisements_active){ 4073 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4074 } 4075 if (!enabled && hci_stack->le_advertisements_active){ 4076 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4077 } 4078 hci_run(); 4079 } 4080 4081 #endif 4082 4083 void hci_le_set_own_address_type(uint8_t own_address_type){ 4084 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4085 if (own_address_type == hci_stack->le_own_addr_type) return; 4086 hci_stack->le_own_addr_type = own_address_type; 4087 4088 #ifdef ENABLE_LE_PERIPHERAL 4089 // update advertisement parameters, too 4090 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4091 gap_advertisments_changed(); 4092 #endif 4093 #ifdef ENABLE_LE_CENTRAL 4094 // note: we don't update scan parameters or modify ongoing connection attempts 4095 #endif 4096 } 4097 4098 #endif 4099 4100 uint8_t gap_disconnect(hci_con_handle_t handle){ 4101 hci_connection_t * conn = hci_connection_for_handle(handle); 4102 if (!conn){ 4103 hci_emit_disconnection_complete(handle, 0); 4104 return 0; 4105 } 4106 conn->state = SEND_DISCONNECT; 4107 hci_run(); 4108 return 0; 4109 } 4110 4111 /** 4112 * @brief Get connection type 4113 * @param con_handle 4114 * @result connection_type 4115 */ 4116 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4117 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4118 if (!conn) return GAP_CONNECTION_INVALID; 4119 switch (conn->address_type){ 4120 case BD_ADDR_TYPE_LE_PUBLIC: 4121 case BD_ADDR_TYPE_LE_RANDOM: 4122 return GAP_CONNECTION_LE; 4123 case BD_ADDR_TYPE_SCO: 4124 return GAP_CONNECTION_SCO; 4125 case BD_ADDR_TYPE_CLASSIC: 4126 return GAP_CONNECTION_ACL; 4127 default: 4128 return GAP_CONNECTION_INVALID; 4129 } 4130 } 4131 4132 #ifdef ENABLE_BLE 4133 4134 #ifdef ENABLE_LE_CENTRAL 4135 /** 4136 * @brief Auto Connection Establishment - Start Connecting to device 4137 * @param address_typ 4138 * @param address 4139 * @returns 0 if ok 4140 */ 4141 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4142 // check capacity 4143 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4144 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4145 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4146 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4147 entry->address_type = address_type; 4148 memcpy(entry->address, address, 6); 4149 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4150 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4151 hci_run(); 4152 return 0; 4153 } 4154 4155 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4156 btstack_linked_list_iterator_t it; 4157 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4158 while (btstack_linked_list_iterator_has_next(&it)){ 4159 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4160 if (entry->address_type != address_type) continue; 4161 if (memcmp(entry->address, address, 6) != 0) continue; 4162 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4163 // remove from controller if already present 4164 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4165 continue; 4166 } 4167 // direclty remove entry from whitelist 4168 btstack_linked_list_iterator_remove(&it); 4169 btstack_memory_whitelist_entry_free(entry); 4170 } 4171 } 4172 4173 /** 4174 * @brief Auto Connection Establishment - Stop Connecting to device 4175 * @param address_typ 4176 * @param address 4177 * @returns 0 if ok 4178 */ 4179 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4180 hci_remove_from_whitelist(address_type, address); 4181 hci_run(); 4182 return 0; 4183 } 4184 4185 /** 4186 * @brief Auto Connection Establishment - Stop everything 4187 * @note Convenience function to stop all active auto connection attempts 4188 */ 4189 void gap_auto_connection_stop_all(void){ 4190 btstack_linked_list_iterator_t it; 4191 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4192 while (btstack_linked_list_iterator_has_next(&it)){ 4193 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4194 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4195 // remove from controller if already present 4196 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4197 continue; 4198 } 4199 // directly remove entry from whitelist 4200 btstack_linked_list_iterator_remove(&it); 4201 btstack_memory_whitelist_entry_free(entry); 4202 } 4203 hci_run(); 4204 } 4205 #endif 4206 #endif 4207 4208 #ifdef ENABLE_CLASSIC 4209 /** 4210 * @brief Set Extended Inquiry Response data 4211 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4212 * @note has to be done before stack starts up 4213 */ 4214 void gap_set_extended_inquiry_response(const uint8_t * data){ 4215 hci_stack->eir_data = data; 4216 } 4217 4218 /** 4219 * @brief Start GAP Classic Inquiry 4220 * @param duration in 1.28s units 4221 * @return 0 if ok 4222 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4223 */ 4224 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4225 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4226 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4227 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4228 } 4229 hci_stack->inquiry_state = duration_in_1280ms_units; 4230 hci_run(); 4231 return 0; 4232 } 4233 4234 /** 4235 * @brief Stop GAP Classic Inquiry 4236 * @returns 0 if ok 4237 */ 4238 int gap_inquiry_stop(void){ 4239 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4240 // emit inquiry complete event, before it even started 4241 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4242 hci_emit_event(event, sizeof(event), 1); 4243 return 0; 4244 } 4245 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4246 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4247 hci_run(); 4248 return 0; 4249 } 4250 4251 4252 /** 4253 * @brief Remote Name Request 4254 * @param addr 4255 * @param page_scan_repetition_mode 4256 * @param clock_offset only used when bit 15 is set 4257 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4258 */ 4259 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4260 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4261 memcpy(hci_stack->remote_name_addr, addr, 6); 4262 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4263 hci_stack->remote_name_clock_offset = clock_offset; 4264 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4265 hci_run(); 4266 return 0; 4267 } 4268 4269 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4270 hci_stack->gap_pairing_state = state; 4271 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4272 hci_run(); 4273 return 0; 4274 } 4275 4276 /** 4277 * @brief Legacy Pairing Pin Code Response 4278 * @param addr 4279 * @param pin 4280 * @return 0 if ok 4281 */ 4282 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4283 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4284 hci_stack->gap_pairing_pin = pin; 4285 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4286 } 4287 4288 /** 4289 * @brief Abort Legacy Pairing 4290 * @param addr 4291 * @param pin 4292 * @return 0 if ok 4293 */ 4294 int gap_pin_code_negative(bd_addr_t addr){ 4295 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4296 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4297 } 4298 4299 /** 4300 * @brief SSP Passkey Response 4301 * @param addr 4302 * @param passkey 4303 * @return 0 if ok 4304 */ 4305 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4306 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4307 hci_stack->gap_pairing_passkey = passkey; 4308 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4309 } 4310 4311 /** 4312 * @brief Abort SSP Passkey Entry/Pairing 4313 * @param addr 4314 * @param pin 4315 * @return 0 if ok 4316 */ 4317 int gap_ssp_passkey_negative(bd_addr_t addr){ 4318 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4319 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4320 } 4321 4322 /** 4323 * @brief Accept SSP Numeric Comparison 4324 * @param addr 4325 * @param passkey 4326 * @return 0 if ok 4327 */ 4328 int gap_ssp_confirmation_response(bd_addr_t addr){ 4329 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4330 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4331 } 4332 4333 /** 4334 * @brief Abort SSP Numeric Comparison/Pairing 4335 * @param addr 4336 * @param pin 4337 * @return 0 if ok 4338 */ 4339 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4340 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4341 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4342 } 4343 4344 /** 4345 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4346 * @param inquiry_mode see bluetooth_defines.h 4347 */ 4348 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4349 hci_stack->inquiry_mode = mode; 4350 } 4351 4352 /** 4353 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4354 */ 4355 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4356 hci_stack->sco_voice_setting = voice_setting; 4357 } 4358 4359 /** 4360 * @brief Get SCO Voice Setting 4361 * @return current voice setting 4362 */ 4363 uint16_t hci_get_sco_voice_setting(void){ 4364 return hci_stack->sco_voice_setting; 4365 } 4366 4367 /** @brief Get SCO packet length for current SCO Voice setting 4368 * @note Using SCO packets of the exact length is required for USB transfer 4369 * @return Length of SCO packets in bytes (not audio frames) 4370 */ 4371 int hci_get_sco_packet_length(void){ 4372 // see Core Spec for H2 USB Transfer. 4373 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4374 return 27; 4375 } 4376 #endif 4377 4378 4379 HCI_STATE hci_get_state(void){ 4380 return hci_stack->state; 4381 } 4382 4383 4384 /** 4385 * @brief Set callback for Bluetooth Hardware Error 4386 */ 4387 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4388 hci_stack->hardware_error_callback = fn; 4389 } 4390 4391 void hci_disconnect_all(void){ 4392 btstack_linked_list_iterator_t it; 4393 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4394 while (btstack_linked_list_iterator_has_next(&it)){ 4395 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4396 if (con->state == SENT_DISCONNECT) continue; 4397 con->state = SEND_DISCONNECT; 4398 } 4399 hci_run(); 4400 } 4401 4402 uint16_t hci_get_manufacturer(void){ 4403 return hci_stack->manufacturer; 4404 } 4405