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 #endif 1301 1302 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1303 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1304 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1305 hci_send_cmd(&hci_le_read_maximum_data_length); 1306 break; 1307 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1308 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1309 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1310 break; 1311 #endif 1312 1313 #ifdef ENABLE_LE_CENTRAL 1314 case HCI_INIT_READ_WHITE_LIST_SIZE: 1315 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1316 hci_send_cmd(&hci_le_read_white_list_size); 1317 break; 1318 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1319 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1320 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1321 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1322 break; 1323 #endif 1324 default: 1325 return; 1326 } 1327 } 1328 1329 static void hci_init_done(void){ 1330 // done. tell the app 1331 log_info("hci_init_done -> HCI_STATE_WORKING"); 1332 hci_stack->state = HCI_STATE_WORKING; 1333 hci_emit_state(); 1334 hci_run(); 1335 } 1336 1337 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1338 UNUSED(size); 1339 1340 uint8_t command_completed = 0; 1341 1342 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1343 uint16_t opcode = little_endian_read_16(packet,3); 1344 if (opcode == hci_stack->last_cmd_opcode){ 1345 command_completed = 1; 1346 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1347 } else { 1348 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1349 } 1350 } 1351 1352 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1353 uint8_t status = packet[2]; 1354 uint16_t opcode = little_endian_read_16(packet,4); 1355 if (opcode == hci_stack->last_cmd_opcode){ 1356 if (status){ 1357 command_completed = 1; 1358 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1359 } else { 1360 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1361 } 1362 } else { 1363 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1364 } 1365 } 1366 1367 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1368 1369 // Vendor == CSR 1370 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1371 // TODO: track actual command 1372 command_completed = 1; 1373 } 1374 1375 // Vendor == Toshiba 1376 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1377 // TODO: track actual command 1378 command_completed = 1; 1379 } 1380 1381 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1382 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1383 // 1384 // HCI Reset 1385 // Timeout 100 ms 1386 // HCI Reset 1387 // Command Complete Reset 1388 // HCI Read Local Version Information 1389 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1390 // hang... 1391 // 1392 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1393 if (!command_completed 1394 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1395 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1396 1397 uint16_t opcode = little_endian_read_16(packet,3); 1398 if (opcode == hci_reset.opcode){ 1399 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1400 return; 1401 } 1402 } 1403 1404 // CSR & H5 1405 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1406 if (!command_completed 1407 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1408 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1409 1410 uint16_t opcode = little_endian_read_16(packet,3); 1411 if (opcode == hci_reset.opcode){ 1412 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1413 return; 1414 } 1415 } 1416 1417 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1418 // fix: Correct substate and behave as command below 1419 if (command_completed){ 1420 switch (hci_stack->substate){ 1421 case HCI_INIT_SEND_RESET: 1422 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1423 break; 1424 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1425 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1426 break; 1427 default: 1428 break; 1429 } 1430 } 1431 1432 #endif 1433 1434 if (!command_completed) return; 1435 1436 int need_baud_change = 0; 1437 int need_addr_change = 0; 1438 1439 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1440 need_baud_change = hci_stack->config 1441 && hci_stack->chipset 1442 && hci_stack->chipset->set_baudrate_command 1443 && hci_stack->hci_transport->set_baudrate 1444 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1445 1446 need_addr_change = hci_stack->custom_bd_addr_set 1447 && hci_stack->chipset 1448 && hci_stack->chipset->set_bd_addr_command; 1449 #endif 1450 1451 switch(hci_stack->substate){ 1452 1453 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1454 case HCI_INIT_SEND_RESET: 1455 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1456 // fix: just correct substate and behave as command below 1457 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1458 btstack_run_loop_remove_timer(&hci_stack->timeout); 1459 break; 1460 case HCI_INIT_W4_SEND_RESET: 1461 btstack_run_loop_remove_timer(&hci_stack->timeout); 1462 break; 1463 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1464 log_info("Received local name, need baud change %d", need_baud_change); 1465 if (need_baud_change){ 1466 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1467 return; 1468 } 1469 // skip baud change 1470 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1471 return; 1472 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1473 // for STLC2500D, baud rate change already happened. 1474 // for others, baud rate gets changed now 1475 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1476 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1477 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1478 hci_stack->hci_transport->set_baudrate(baud_rate); 1479 } 1480 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1481 return; 1482 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1483 btstack_run_loop_remove_timer(&hci_stack->timeout); 1484 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1485 return; 1486 case HCI_INIT_W4_CUSTOM_INIT: 1487 // repeat custom init 1488 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1489 return; 1490 #else 1491 case HCI_INIT_W4_SEND_RESET: 1492 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1493 return ; 1494 #endif 1495 1496 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1497 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1498 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1499 return; 1500 } 1501 if (need_addr_change){ 1502 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1503 return; 1504 } 1505 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1506 return; 1507 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1508 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1509 if (need_baud_change){ 1510 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1511 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1512 hci_stack->hci_transport->set_baudrate(baud_rate); 1513 } 1514 if (need_addr_change){ 1515 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1516 return; 1517 } 1518 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1519 return; 1520 case HCI_INIT_W4_SET_BD_ADDR: 1521 // for STLC2500D, bd addr change only gets active after sending reset command 1522 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1523 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1524 return; 1525 } 1526 // skipping st warm boot 1527 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1528 return; 1529 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1530 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1531 return; 1532 #endif 1533 case HCI_INIT_W4_READ_BD_ADDR: 1534 // only read buffer size if supported 1535 if (hci_stack->local_supported_commands[0] & 0x01) { 1536 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1537 return; 1538 } 1539 // skipping read buffer size 1540 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1541 return; 1542 case HCI_INIT_W4_SET_EVENT_MASK: 1543 // skip Classic init commands for LE only chipsets 1544 if (!hci_classic_supported()){ 1545 #ifdef ENABLE_BLE 1546 if (hci_le_supported()){ 1547 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1548 return; 1549 } 1550 #endif 1551 log_error("Neither BR/EDR nor LE supported"); 1552 hci_init_done(); 1553 return; 1554 } 1555 if (!gap_ssp_supported()){ 1556 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1557 return; 1558 } 1559 break; 1560 #ifdef ENABLE_BLE 1561 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1562 // skip write le host if not supported (e.g. on LE only EM9301) 1563 if (hci_stack->local_supported_commands[0] & 0x02) break; 1564 // explicit fall through to reduce repetitions 1565 1566 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1567 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1568 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1569 hci_stack->substate = HCI_INIT_LE_READ_MAX_DATA_LENGTH; 1570 return; 1571 } 1572 // explicit fall through to reduce repetitions 1573 #endif 1574 1575 #ifdef ENABLE_LE_CENTRAL 1576 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1577 #else 1578 hci_init_done(); 1579 #endif 1580 return; 1581 #endif 1582 1583 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1584 // skip write eir data if no eir data set 1585 if (hci_stack->eir_data) break; 1586 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1587 return; 1588 1589 #ifdef ENABLE_SCO_OVER_HCI 1590 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1591 // skip write synchronous flow control if not supported 1592 if (hci_stack->local_supported_commands[0] & 0x04) break; 1593 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1594 // explicit fall through to reduce repetitions 1595 1596 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1597 // skip write default erroneous data reporting if not supported 1598 if (hci_stack->local_supported_commands[0] & 0x08) break; 1599 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1600 // explicit fall through to reduce repetitions 1601 1602 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1603 // skip bcm set sco pcm config on non-Broadcom chipsets 1604 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1605 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1606 // explicit fall through to reduce repetitions 1607 1608 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1609 if (!hci_le_supported()){ 1610 // SKIP LE init for Classic only configuration 1611 hci_init_done(); 1612 return; 1613 } 1614 break; 1615 1616 #else /* !ENABLE_SCO_OVER_HCI */ 1617 1618 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1619 #ifdef ENABLE_BLE 1620 if (hci_le_supported()){ 1621 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1622 return; 1623 } 1624 #endif 1625 // SKIP LE init for Classic only configuration 1626 hci_init_done(); 1627 return; 1628 #endif /* ENABLE_SCO_OVER_HCI */ 1629 1630 // Response to command before init done state -> init done 1631 case (HCI_INIT_DONE-1): 1632 hci_init_done(); 1633 return; 1634 1635 default: 1636 break; 1637 } 1638 hci_initializing_next_state(); 1639 } 1640 1641 static void event_handler(uint8_t *packet, int size){ 1642 1643 uint16_t event_length = packet[1]; 1644 1645 // assert packet is complete 1646 if (size != event_length + 2){ 1647 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1648 return; 1649 } 1650 1651 bd_addr_t addr; 1652 bd_addr_type_t addr_type; 1653 hci_con_handle_t handle; 1654 hci_connection_t * conn; 1655 int i; 1656 #ifdef ENABLE_CLASSIC 1657 uint8_t link_type; 1658 #endif 1659 1660 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1661 1662 switch (hci_event_packet_get_type(packet)) { 1663 1664 case HCI_EVENT_COMMAND_COMPLETE: 1665 // get num cmd packets - limit to 1 to reduce complexity 1666 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1667 1668 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1669 if (packet[5]) break; 1670 // terminate, name 248 chars 1671 packet[6+248] = 0; 1672 log_info("local name: %s", &packet[6]); 1673 } 1674 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1675 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1676 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1677 uint16_t acl_len = little_endian_read_16(packet, 6); 1678 uint16_t sco_len = packet[8]; 1679 1680 // determine usable ACL/SCO payload size 1681 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1682 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1683 1684 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1685 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1686 1687 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1688 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1689 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1690 } 1691 } 1692 #ifdef ENABLE_BLE 1693 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1694 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1695 hci_stack->le_acl_packets_total_num = packet[8]; 1696 // determine usable ACL payload size 1697 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1698 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1699 } 1700 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1701 } 1702 #endif 1703 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1704 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1705 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1706 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1707 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1708 } 1709 #endif 1710 #ifdef ENABLE_LE_CENTRAL 1711 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1712 hci_stack->le_whitelist_capacity = packet[6]; 1713 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1714 } 1715 #endif 1716 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1717 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1718 hci_stack->local_bd_addr); 1719 log_info("Local Address, Status: 0x%02x: Addr: %s", 1720 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1721 #ifdef ENABLE_CLASSIC 1722 if (hci_stack->link_key_db){ 1723 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1724 } 1725 #endif 1726 } 1727 #ifdef ENABLE_CLASSIC 1728 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1729 hci_emit_discoverable_enabled(hci_stack->discoverable); 1730 } 1731 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1732 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1733 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1734 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1735 hci_emit_event(event, sizeof(event), 1); 1736 } 1737 } 1738 #endif 1739 1740 // Note: HCI init checks 1741 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1742 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1743 1744 #ifdef ENABLE_CLASSIC 1745 // determine usable ACL packet types based on host buffer size and supported features 1746 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1747 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1748 #endif 1749 // Classic/LE 1750 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1751 } 1752 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1753 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1754 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1755 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1756 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1757 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1758 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1759 } 1760 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1761 hci_stack->local_supported_commands[0] = 1762 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1763 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1764 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1765 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1766 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1767 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1768 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1769 } 1770 #ifdef ENABLE_CLASSIC 1771 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1772 if (packet[5] == 0){ 1773 hci_stack->synchronous_flow_control_enabled = 1; 1774 } 1775 } 1776 #endif 1777 break; 1778 1779 case HCI_EVENT_COMMAND_STATUS: 1780 // get num cmd packets - limit to 1 to reduce complexity 1781 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1782 break; 1783 1784 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1785 int offset = 3; 1786 for (i=0; i<packet[2];i++){ 1787 handle = little_endian_read_16(packet, offset); 1788 offset += 2; 1789 uint16_t num_packets = little_endian_read_16(packet, offset); 1790 offset += 2; 1791 1792 conn = hci_connection_for_handle(handle); 1793 if (!conn){ 1794 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1795 continue; 1796 } 1797 1798 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1799 #ifdef ENABLE_CLASSIC 1800 if (conn->num_sco_packets_sent >= num_packets){ 1801 conn->num_sco_packets_sent -= num_packets; 1802 } else { 1803 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1804 conn->num_sco_packets_sent = 0; 1805 } 1806 hci_notify_if_sco_can_send_now(); 1807 #endif 1808 } else { 1809 if (conn->num_acl_packets_sent >= num_packets){ 1810 conn->num_acl_packets_sent -= num_packets; 1811 } else { 1812 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1813 conn->num_acl_packets_sent = 0; 1814 } 1815 } 1816 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1817 } 1818 break; 1819 } 1820 1821 #ifdef ENABLE_CLASSIC 1822 case HCI_EVENT_INQUIRY_COMPLETE: 1823 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1824 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1825 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1826 hci_emit_event(event, sizeof(event), 1); 1827 } 1828 break; 1829 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1830 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1831 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1832 } 1833 break; 1834 case HCI_EVENT_CONNECTION_REQUEST: 1835 reverse_bd_addr(&packet[2], addr); 1836 // TODO: eval COD 8-10 1837 link_type = packet[11]; 1838 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1839 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1840 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1841 if (!conn) { 1842 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1843 } 1844 if (!conn) { 1845 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1846 hci_stack->decline_reason = 0x0d; 1847 bd_addr_copy(hci_stack->decline_addr, addr); 1848 break; 1849 } 1850 conn->role = HCI_ROLE_SLAVE; 1851 conn->state = RECEIVED_CONNECTION_REQUEST; 1852 // store info about eSCO 1853 if (link_type == 0x02){ 1854 conn->remote_supported_feature_eSCO = 1; 1855 } 1856 hci_run(); 1857 break; 1858 1859 case HCI_EVENT_CONNECTION_COMPLETE: 1860 // Connection management 1861 reverse_bd_addr(&packet[5], addr); 1862 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1863 addr_type = BD_ADDR_TYPE_CLASSIC; 1864 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1865 if (conn) { 1866 if (!packet[2]){ 1867 conn->state = OPEN; 1868 conn->con_handle = little_endian_read_16(packet, 3); 1869 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1870 1871 // restart timer 1872 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1873 btstack_run_loop_add_timer(&conn->timeout); 1874 1875 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1876 1877 hci_emit_nr_connections_changed(); 1878 } else { 1879 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1880 uint8_t status = packet[2]; 1881 bd_addr_t bd_address; 1882 memcpy(&bd_address, conn->address, 6); 1883 1884 // connection failed, remove entry 1885 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1886 btstack_memory_hci_connection_free( conn ); 1887 1888 // notify client if dedicated bonding 1889 if (notify_dedicated_bonding_failed){ 1890 log_info("hci notify_dedicated_bonding_failed"); 1891 hci_emit_dedicated_bonding_result(bd_address, status); 1892 } 1893 1894 // if authentication error, also delete link key 1895 if (packet[2] == 0x05) { 1896 gap_drop_link_key_for_bd_addr(addr); 1897 } 1898 } 1899 } 1900 break; 1901 1902 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1903 reverse_bd_addr(&packet[5], addr); 1904 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1905 if (packet[2]){ 1906 // connection failed 1907 break; 1908 } 1909 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1910 if (!conn) { 1911 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1912 } 1913 if (!conn) { 1914 break; 1915 } 1916 conn->state = OPEN; 1917 conn->con_handle = little_endian_read_16(packet, 3); 1918 1919 #ifdef ENABLE_SCO_OVER_HCI 1920 // update SCO 1921 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1922 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1923 } 1924 #endif 1925 break; 1926 1927 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1928 handle = little_endian_read_16(packet, 3); 1929 conn = hci_connection_for_handle(handle); 1930 if (!conn) break; 1931 if (!packet[2]){ 1932 uint8_t * features = &packet[5]; 1933 if (features[6] & (1 << 3)){ 1934 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1935 } 1936 if (features[3] & (1<<7)){ 1937 conn->remote_supported_feature_eSCO = 1; 1938 } 1939 } 1940 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1941 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1942 if (conn->bonding_flags & BONDING_DEDICATED){ 1943 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1944 } 1945 break; 1946 1947 case HCI_EVENT_LINK_KEY_REQUEST: 1948 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1949 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1950 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1951 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1952 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1953 hci_run(); 1954 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1955 return; 1956 1957 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1958 reverse_bd_addr(&packet[2], addr); 1959 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1960 if (!conn) break; 1961 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1962 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1963 // Change Connection Encryption keeps link key type 1964 if (link_key_type != CHANGED_COMBINATION_KEY){ 1965 conn->link_key_type = link_key_type; 1966 } 1967 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1968 // still forward event to allow dismiss of pairing dialog 1969 break; 1970 } 1971 1972 case HCI_EVENT_PIN_CODE_REQUEST: 1973 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1974 // non-bondable mode: pin code negative reply will be sent 1975 if (!hci_stack->bondable){ 1976 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1977 hci_run(); 1978 return; 1979 } 1980 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1981 if (!hci_stack->link_key_db) break; 1982 hci_event_pin_code_request_get_bd_addr(packet, addr); 1983 hci_stack->link_key_db->delete_link_key(addr); 1984 break; 1985 1986 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1987 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1988 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1989 break; 1990 1991 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1992 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1993 if (!hci_stack->ssp_auto_accept) break; 1994 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1995 break; 1996 1997 case HCI_EVENT_USER_PASSKEY_REQUEST: 1998 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1999 if (!hci_stack->ssp_auto_accept) break; 2000 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2001 break; 2002 #endif 2003 2004 case HCI_EVENT_ENCRYPTION_CHANGE: 2005 handle = little_endian_read_16(packet, 3); 2006 conn = hci_connection_for_handle(handle); 2007 if (!conn) break; 2008 if (packet[2] == 0) { 2009 if (packet[5]){ 2010 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2011 } else { 2012 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2013 } 2014 } 2015 #ifdef ENABLE_CLASSIC 2016 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2017 #endif 2018 break; 2019 2020 #ifdef ENABLE_CLASSIC 2021 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2022 handle = little_endian_read_16(packet, 3); 2023 conn = hci_connection_for_handle(handle); 2024 if (!conn) break; 2025 2026 // dedicated bonding: send result and disconnect 2027 if (conn->bonding_flags & BONDING_DEDICATED){ 2028 conn->bonding_flags &= ~BONDING_DEDICATED; 2029 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2030 conn->bonding_status = packet[2]; 2031 break; 2032 } 2033 2034 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2035 // link key sufficient for requested security 2036 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2037 break; 2038 } 2039 // not enough 2040 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2041 break; 2042 #endif 2043 2044 // HCI_EVENT_DISCONNECTION_COMPLETE 2045 // has been split, to first notify stack before shutting connection down 2046 // see end of function, too. 2047 case HCI_EVENT_DISCONNECTION_COMPLETE: 2048 if (packet[2]) break; // status != 0 2049 handle = little_endian_read_16(packet, 3); 2050 // drop outgoing ACL fragments if it is for closed connection 2051 if (hci_stack->acl_fragmentation_total_size > 0) { 2052 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2053 log_info("hci: drop fragmented ACL data for closed connection"); 2054 hci_stack->acl_fragmentation_total_size = 0; 2055 hci_stack->acl_fragmentation_pos = 0; 2056 } 2057 } 2058 2059 // re-enable advertisements for le connections if active 2060 conn = hci_connection_for_handle(handle); 2061 if (!conn) break; 2062 #ifdef ENABLE_BLE 2063 #ifdef ENABLE_LE_PERIPHERAL 2064 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2065 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2066 } 2067 #endif 2068 #endif 2069 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2070 break; 2071 2072 case HCI_EVENT_HARDWARE_ERROR: 2073 log_error("Hardware Error: 0x%02x", packet[2]); 2074 if (hci_stack->hardware_error_callback){ 2075 (*hci_stack->hardware_error_callback)(packet[2]); 2076 } else { 2077 // if no special requests, just reboot stack 2078 hci_power_control_off(); 2079 hci_power_control_on(); 2080 } 2081 break; 2082 2083 #ifdef ENABLE_CLASSIC 2084 case HCI_EVENT_ROLE_CHANGE: 2085 if (packet[2]) break; // status != 0 2086 handle = little_endian_read_16(packet, 3); 2087 conn = hci_connection_for_handle(handle); 2088 if (!conn) break; // no conn 2089 conn->role = packet[9]; 2090 break; 2091 #endif 2092 2093 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2094 // release packet buffer only for asynchronous transport and if there are not further fragements 2095 if (hci_transport_synchronous()) { 2096 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2097 return; // instead of break: to avoid re-entering hci_run() 2098 } 2099 if (hci_stack->acl_fragmentation_total_size) break; 2100 hci_release_packet_buffer(); 2101 2102 // L2CAP receives this event via the hci_emit_event below 2103 2104 #ifdef ENABLE_CLASSIC 2105 // For SCO, we do the can_send_now_check here 2106 hci_notify_if_sco_can_send_now(); 2107 #endif 2108 break; 2109 2110 #ifdef ENABLE_CLASSIC 2111 case HCI_EVENT_SCO_CAN_SEND_NOW: 2112 // For SCO, we do the can_send_now_check here 2113 hci_notify_if_sco_can_send_now(); 2114 return; 2115 2116 // explode inquriy results for easier consumption 2117 case HCI_EVENT_INQUIRY_RESULT: 2118 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2119 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2120 gap_inquiry_explode(packet); 2121 break; 2122 #endif 2123 2124 #ifdef ENABLE_BLE 2125 case HCI_EVENT_LE_META: 2126 switch (packet[2]){ 2127 #ifdef ENABLE_LE_CENTRAL 2128 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2129 // log_info("advertising report received"); 2130 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2131 le_handle_advertisement_report(packet, size); 2132 break; 2133 #endif 2134 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2135 // Connection management 2136 reverse_bd_addr(&packet[8], addr); 2137 addr_type = (bd_addr_type_t)packet[7]; 2138 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2139 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2140 #ifdef ENABLE_LE_CENTRAL 2141 // if auto-connect, remove from whitelist in both roles 2142 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2143 hci_remove_from_whitelist(addr_type, addr); 2144 } 2145 // handle error: error is reported only to the initiator -> outgoing connection 2146 if (packet[3]){ 2147 // outgoing connection establishment is done 2148 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2149 // remove entry 2150 if (conn){ 2151 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2152 btstack_memory_hci_connection_free( conn ); 2153 } 2154 break; 2155 } 2156 #endif 2157 // on success, both hosts receive connection complete event 2158 if (packet[6] == HCI_ROLE_MASTER){ 2159 #ifdef ENABLE_LE_CENTRAL 2160 // if we're master, it was an outgoing connection and we're done with it 2161 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2162 #endif 2163 } else { 2164 #ifdef ENABLE_LE_PERIPHERAL 2165 // if we're slave, it was an incoming connection, advertisements have stopped 2166 hci_stack->le_advertisements_active = 0; 2167 // try to re-enable them 2168 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2169 #endif 2170 } 2171 // LE connections are auto-accepted, so just create a connection if there isn't one already 2172 if (!conn){ 2173 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2174 } 2175 // no memory, sorry. 2176 if (!conn){ 2177 break; 2178 } 2179 2180 conn->state = OPEN; 2181 conn->role = packet[6]; 2182 conn->con_handle = little_endian_read_16(packet, 4); 2183 2184 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2185 2186 // restart timer 2187 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2188 // btstack_run_loop_add_timer(&conn->timeout); 2189 2190 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2191 2192 hci_emit_nr_connections_changed(); 2193 break; 2194 2195 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2196 2197 default: 2198 break; 2199 } 2200 break; 2201 #endif 2202 default: 2203 break; 2204 } 2205 2206 // handle BT initialization 2207 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2208 hci_initializing_event_handler(packet, size); 2209 } 2210 2211 // help with BT sleep 2212 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2213 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2214 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2215 hci_initializing_next_state(); 2216 } 2217 2218 // notify upper stack 2219 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2220 2221 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2222 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2223 if (!packet[2]){ 2224 handle = little_endian_read_16(packet, 3); 2225 hci_connection_t * aConn = hci_connection_for_handle(handle); 2226 if (aConn) { 2227 uint8_t status = aConn->bonding_status; 2228 uint16_t flags = aConn->bonding_flags; 2229 bd_addr_t bd_address; 2230 memcpy(&bd_address, aConn->address, 6); 2231 hci_shutdown_connection(aConn); 2232 // connection struct is gone, don't access anymore 2233 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2234 hci_emit_dedicated_bonding_result(bd_address, status); 2235 } 2236 } 2237 } 2238 } 2239 2240 // execute main loop 2241 hci_run(); 2242 } 2243 2244 #ifdef ENABLE_CLASSIC 2245 static void sco_handler(uint8_t * packet, uint16_t size){ 2246 if (!hci_stack->sco_packet_handler) return; 2247 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2248 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2249 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2250 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2251 if (conn){ 2252 conn->num_packets_completed++; 2253 hci_stack->host_completed_packets = 1; 2254 hci_run(); 2255 } 2256 #endif 2257 } 2258 #endif 2259 2260 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2261 hci_dump_packet(packet_type, 1, packet, size); 2262 switch (packet_type) { 2263 case HCI_EVENT_PACKET: 2264 event_handler(packet, size); 2265 break; 2266 case HCI_ACL_DATA_PACKET: 2267 acl_handler(packet, size); 2268 break; 2269 #ifdef ENABLE_CLASSIC 2270 case HCI_SCO_DATA_PACKET: 2271 sco_handler(packet, size); 2272 break; 2273 #endif 2274 default: 2275 break; 2276 } 2277 } 2278 2279 /** 2280 * @brief Add event packet handler. 2281 */ 2282 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2283 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2284 } 2285 2286 2287 /** Register HCI packet handlers */ 2288 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2289 hci_stack->acl_packet_handler = handler; 2290 } 2291 2292 #ifdef ENABLE_CLASSIC 2293 /** 2294 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2295 */ 2296 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2297 hci_stack->sco_packet_handler = handler; 2298 } 2299 #endif 2300 2301 static void hci_state_reset(void){ 2302 // no connections yet 2303 hci_stack->connections = NULL; 2304 2305 // keep discoverable/connectable as this has been requested by the client(s) 2306 // hci_stack->discoverable = 0; 2307 // hci_stack->connectable = 0; 2308 // hci_stack->bondable = 1; 2309 // hci_stack->own_addr_type = 0; 2310 2311 // buffer is free 2312 hci_stack->hci_packet_buffer_reserved = 0; 2313 2314 // no pending cmds 2315 hci_stack->decline_reason = 0; 2316 hci_stack->new_scan_enable_value = 0xff; 2317 2318 // LE 2319 #ifdef ENABLE_BLE 2320 memset(hci_stack->le_random_address, 0, 6); 2321 hci_stack->le_random_address_set = 0; 2322 #endif 2323 #ifdef ENABLE_LE_CENTRAL 2324 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2325 hci_stack->le_scan_type = 0xff; 2326 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2327 hci_stack->le_whitelist = 0; 2328 hci_stack->le_whitelist_capacity = 0; 2329 2330 // connection parameter to use for outgoing connections 2331 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2332 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2333 hci_stack->le_connection_latency = 4; // 4 2334 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2335 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2336 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2337 #endif 2338 2339 // connection parameter range used to answer connection parameter update requests in l2cap 2340 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2341 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2342 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2343 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2344 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2345 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2346 } 2347 2348 #ifdef ENABLE_CLASSIC 2349 /** 2350 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2351 */ 2352 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2353 // store and open remote device db 2354 hci_stack->link_key_db = link_key_db; 2355 if (hci_stack->link_key_db) { 2356 hci_stack->link_key_db->open(); 2357 } 2358 } 2359 #endif 2360 2361 void hci_init(const hci_transport_t *transport, const void *config){ 2362 2363 #ifdef HAVE_MALLOC 2364 if (!hci_stack) { 2365 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2366 } 2367 #else 2368 hci_stack = &hci_stack_static; 2369 #endif 2370 memset(hci_stack, 0, sizeof(hci_stack_t)); 2371 2372 // reference to use transport layer implementation 2373 hci_stack->hci_transport = transport; 2374 2375 // reference to used config 2376 hci_stack->config = config; 2377 2378 // setup pointer for outgoing packet buffer 2379 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2380 2381 // max acl payload size defined in config.h 2382 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2383 2384 // register packet handlers with transport 2385 transport->register_packet_handler(&packet_handler); 2386 2387 hci_stack->state = HCI_STATE_OFF; 2388 2389 // class of device 2390 hci_stack->class_of_device = 0x007a020c; // Smartphone 2391 2392 // bondable by default 2393 hci_stack->bondable = 1; 2394 2395 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2396 hci_stack->ssp_enable = 1; 2397 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2398 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2399 hci_stack->ssp_auto_accept = 1; 2400 2401 // voice setting - signed 16 bit pcm data with CVSD over the air 2402 hci_stack->sco_voice_setting = 0x60; 2403 2404 hci_state_reset(); 2405 } 2406 2407 /** 2408 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2409 */ 2410 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2411 hci_stack->chipset = chipset_driver; 2412 2413 // reset chipset driver - init is also called on power_up 2414 if (hci_stack->chipset && hci_stack->chipset->init){ 2415 hci_stack->chipset->init(hci_stack->config); 2416 } 2417 } 2418 2419 /** 2420 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2421 */ 2422 void hci_set_control(const btstack_control_t *hardware_control){ 2423 // references to used control implementation 2424 hci_stack->control = hardware_control; 2425 // init with transport config 2426 hardware_control->init(hci_stack->config); 2427 } 2428 2429 void hci_close(void){ 2430 // close remote device db 2431 if (hci_stack->link_key_db) { 2432 hci_stack->link_key_db->close(); 2433 } 2434 2435 btstack_linked_list_iterator_t lit; 2436 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2437 while (btstack_linked_list_iterator_has_next(&lit)){ 2438 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2439 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2440 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2441 hci_shutdown_connection(connection); 2442 } 2443 2444 hci_power_control(HCI_POWER_OFF); 2445 2446 #ifdef HAVE_MALLOC 2447 free(hci_stack); 2448 #endif 2449 hci_stack = NULL; 2450 } 2451 2452 #ifdef ENABLE_CLASSIC 2453 void gap_set_class_of_device(uint32_t class_of_device){ 2454 hci_stack->class_of_device = class_of_device; 2455 } 2456 2457 void hci_disable_l2cap_timeout_check(void){ 2458 disable_l2cap_timeouts = 1; 2459 } 2460 #endif 2461 2462 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2463 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2464 void hci_set_bd_addr(bd_addr_t addr){ 2465 memcpy(hci_stack->custom_bd_addr, addr, 6); 2466 hci_stack->custom_bd_addr_set = 1; 2467 } 2468 #endif 2469 2470 // State-Module-Driver overview 2471 // state module low-level 2472 // HCI_STATE_OFF off close 2473 // HCI_STATE_INITIALIZING, on open 2474 // HCI_STATE_WORKING, on open 2475 // HCI_STATE_HALTING, on open 2476 // HCI_STATE_SLEEPING, off/sleep close 2477 // HCI_STATE_FALLING_ASLEEP on open 2478 2479 static int hci_power_control_on(void){ 2480 2481 // power on 2482 int err = 0; 2483 if (hci_stack->control && hci_stack->control->on){ 2484 err = (*hci_stack->control->on)(); 2485 } 2486 if (err){ 2487 log_error( "POWER_ON failed"); 2488 hci_emit_hci_open_failed(); 2489 return err; 2490 } 2491 2492 // int chipset driver 2493 if (hci_stack->chipset && hci_stack->chipset->init){ 2494 hci_stack->chipset->init(hci_stack->config); 2495 } 2496 2497 // init transport 2498 if (hci_stack->hci_transport->init){ 2499 hci_stack->hci_transport->init(hci_stack->config); 2500 } 2501 2502 // open transport 2503 err = hci_stack->hci_transport->open(); 2504 if (err){ 2505 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2506 if (hci_stack->control && hci_stack->control->off){ 2507 (*hci_stack->control->off)(); 2508 } 2509 hci_emit_hci_open_failed(); 2510 return err; 2511 } 2512 return 0; 2513 } 2514 2515 static void hci_power_control_off(void){ 2516 2517 log_info("hci_power_control_off"); 2518 2519 // close low-level device 2520 hci_stack->hci_transport->close(); 2521 2522 log_info("hci_power_control_off - hci_transport closed"); 2523 2524 // power off 2525 if (hci_stack->control && hci_stack->control->off){ 2526 (*hci_stack->control->off)(); 2527 } 2528 2529 log_info("hci_power_control_off - control closed"); 2530 2531 hci_stack->state = HCI_STATE_OFF; 2532 } 2533 2534 static void hci_power_control_sleep(void){ 2535 2536 log_info("hci_power_control_sleep"); 2537 2538 #if 0 2539 // don't close serial port during sleep 2540 2541 // close low-level device 2542 hci_stack->hci_transport->close(hci_stack->config); 2543 #endif 2544 2545 // sleep mode 2546 if (hci_stack->control && hci_stack->control->sleep){ 2547 (*hci_stack->control->sleep)(); 2548 } 2549 2550 hci_stack->state = HCI_STATE_SLEEPING; 2551 } 2552 2553 static int hci_power_control_wake(void){ 2554 2555 log_info("hci_power_control_wake"); 2556 2557 // wake on 2558 if (hci_stack->control && hci_stack->control->wake){ 2559 (*hci_stack->control->wake)(); 2560 } 2561 2562 #if 0 2563 // open low-level device 2564 int err = hci_stack->hci_transport->open(hci_stack->config); 2565 if (err){ 2566 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2567 if (hci_stack->control && hci_stack->control->off){ 2568 (*hci_stack->control->off)(); 2569 } 2570 hci_emit_hci_open_failed(); 2571 return err; 2572 } 2573 #endif 2574 2575 return 0; 2576 } 2577 2578 static void hci_power_transition_to_initializing(void){ 2579 // set up state machine 2580 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2581 hci_stack->hci_packet_buffer_reserved = 0; 2582 hci_stack->state = HCI_STATE_INITIALIZING; 2583 hci_stack->substate = HCI_INIT_SEND_RESET; 2584 } 2585 2586 int hci_power_control(HCI_POWER_MODE power_mode){ 2587 2588 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2589 2590 int err = 0; 2591 switch (hci_stack->state){ 2592 2593 case HCI_STATE_OFF: 2594 switch (power_mode){ 2595 case HCI_POWER_ON: 2596 err = hci_power_control_on(); 2597 if (err) { 2598 log_error("hci_power_control_on() error %d", err); 2599 return err; 2600 } 2601 hci_power_transition_to_initializing(); 2602 break; 2603 case HCI_POWER_OFF: 2604 // do nothing 2605 break; 2606 case HCI_POWER_SLEEP: 2607 // do nothing (with SLEEP == OFF) 2608 break; 2609 } 2610 break; 2611 2612 case HCI_STATE_INITIALIZING: 2613 switch (power_mode){ 2614 case HCI_POWER_ON: 2615 // do nothing 2616 break; 2617 case HCI_POWER_OFF: 2618 // no connections yet, just turn it off 2619 hci_power_control_off(); 2620 break; 2621 case HCI_POWER_SLEEP: 2622 // no connections yet, just turn it off 2623 hci_power_control_sleep(); 2624 break; 2625 } 2626 break; 2627 2628 case HCI_STATE_WORKING: 2629 switch (power_mode){ 2630 case HCI_POWER_ON: 2631 // do nothing 2632 break; 2633 case HCI_POWER_OFF: 2634 // see hci_run 2635 hci_stack->state = HCI_STATE_HALTING; 2636 break; 2637 case HCI_POWER_SLEEP: 2638 // see hci_run 2639 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2640 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2641 break; 2642 } 2643 break; 2644 2645 case HCI_STATE_HALTING: 2646 switch (power_mode){ 2647 case HCI_POWER_ON: 2648 hci_power_transition_to_initializing(); 2649 break; 2650 case HCI_POWER_OFF: 2651 // do nothing 2652 break; 2653 case HCI_POWER_SLEEP: 2654 // see hci_run 2655 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2656 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2657 break; 2658 } 2659 break; 2660 2661 case HCI_STATE_FALLING_ASLEEP: 2662 switch (power_mode){ 2663 case HCI_POWER_ON: 2664 2665 #ifdef HAVE_PLATFORM_IPHONE_OS 2666 // nothing to do, if H4 supports power management 2667 if (btstack_control_iphone_power_management_enabled()){ 2668 hci_stack->state = HCI_STATE_INITIALIZING; 2669 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2670 break; 2671 } 2672 #endif 2673 hci_power_transition_to_initializing(); 2674 break; 2675 case HCI_POWER_OFF: 2676 // see hci_run 2677 hci_stack->state = HCI_STATE_HALTING; 2678 break; 2679 case HCI_POWER_SLEEP: 2680 // do nothing 2681 break; 2682 } 2683 break; 2684 2685 case HCI_STATE_SLEEPING: 2686 switch (power_mode){ 2687 case HCI_POWER_ON: 2688 2689 #ifdef HAVE_PLATFORM_IPHONE_OS 2690 // nothing to do, if H4 supports power management 2691 if (btstack_control_iphone_power_management_enabled()){ 2692 hci_stack->state = HCI_STATE_INITIALIZING; 2693 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2694 hci_update_scan_enable(); 2695 break; 2696 } 2697 #endif 2698 err = hci_power_control_wake(); 2699 if (err) return err; 2700 hci_power_transition_to_initializing(); 2701 break; 2702 case HCI_POWER_OFF: 2703 hci_stack->state = HCI_STATE_HALTING; 2704 break; 2705 case HCI_POWER_SLEEP: 2706 // do nothing 2707 break; 2708 } 2709 break; 2710 } 2711 2712 // create internal event 2713 hci_emit_state(); 2714 2715 // trigger next/first action 2716 hci_run(); 2717 2718 return 0; 2719 } 2720 2721 2722 #ifdef ENABLE_CLASSIC 2723 2724 static void hci_update_scan_enable(void){ 2725 // 2 = page scan, 1 = inq scan 2726 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2727 hci_run(); 2728 } 2729 2730 void gap_discoverable_control(uint8_t enable){ 2731 if (enable) enable = 1; // normalize argument 2732 2733 if (hci_stack->discoverable == enable){ 2734 hci_emit_discoverable_enabled(hci_stack->discoverable); 2735 return; 2736 } 2737 2738 hci_stack->discoverable = enable; 2739 hci_update_scan_enable(); 2740 } 2741 2742 void gap_connectable_control(uint8_t enable){ 2743 if (enable) enable = 1; // normalize argument 2744 2745 // don't emit event 2746 if (hci_stack->connectable == enable) return; 2747 2748 hci_stack->connectable = enable; 2749 hci_update_scan_enable(); 2750 } 2751 #endif 2752 2753 void gap_local_bd_addr(bd_addr_t address_buffer){ 2754 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2755 } 2756 2757 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2758 static void hci_host_num_completed_packets(void){ 2759 2760 // create packet manually as arrays are not supported and num_commands should not get reduced 2761 hci_reserve_packet_buffer(); 2762 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2763 2764 uint16_t size = 0; 2765 uint16_t num_handles = 0; 2766 packet[size++] = 0x35; 2767 packet[size++] = 0x0c; 2768 size++; // skip param len 2769 size++; // skip num handles 2770 2771 // add { handle, packets } entries 2772 btstack_linked_item_t * it; 2773 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2774 hci_connection_t * connection = (hci_connection_t *) it; 2775 if (connection->num_packets_completed){ 2776 little_endian_store_16(packet, size, connection->con_handle); 2777 size += 2; 2778 little_endian_store_16(packet, size, connection->num_packets_completed); 2779 size += 2; 2780 // 2781 num_handles++; 2782 connection->num_packets_completed = 0; 2783 } 2784 } 2785 2786 packet[2] = size - 3; 2787 packet[3] = num_handles; 2788 2789 hci_stack->host_completed_packets = 0; 2790 2791 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2792 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2793 2794 // release packet buffer for synchronous transport implementations 2795 if (hci_transport_synchronous()){ 2796 hci_stack->hci_packet_buffer_reserved = 0; 2797 } 2798 } 2799 #endif 2800 2801 static void hci_run(void){ 2802 2803 // log_info("hci_run: entered"); 2804 btstack_linked_item_t * it; 2805 2806 // send continuation fragments first, as they block the prepared packet buffer 2807 if (hci_stack->acl_fragmentation_total_size > 0) { 2808 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2809 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2810 if (connection) { 2811 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2812 hci_send_acl_packet_fragments(connection); 2813 return; 2814 } 2815 } else { 2816 // connection gone -> discard further fragments 2817 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2818 hci_stack->acl_fragmentation_total_size = 0; 2819 hci_stack->acl_fragmentation_pos = 0; 2820 } 2821 } 2822 2823 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2824 // send host num completed packets next as they don't require num_cmd_packets > 0 2825 if (!hci_can_send_comand_packet_transport()) return; 2826 if (hci_stack->host_completed_packets){ 2827 hci_host_num_completed_packets(); 2828 return; 2829 } 2830 #endif 2831 2832 if (!hci_can_send_command_packet_now()) return; 2833 2834 // global/non-connection oriented commands 2835 2836 #ifdef ENABLE_CLASSIC 2837 // decline incoming connections 2838 if (hci_stack->decline_reason){ 2839 uint8_t reason = hci_stack->decline_reason; 2840 hci_stack->decline_reason = 0; 2841 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2842 return; 2843 } 2844 // send scan enable 2845 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2846 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2847 hci_stack->new_scan_enable_value = 0xff; 2848 return; 2849 } 2850 // start/stop inquiry 2851 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2852 uint8_t duration = hci_stack->inquiry_state; 2853 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2854 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2855 return; 2856 } 2857 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2858 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2859 hci_send_cmd(&hci_inquiry_cancel); 2860 return; 2861 } 2862 // remote name request 2863 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2864 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2865 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2866 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2867 return; 2868 } 2869 // pairing 2870 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2871 uint8_t state = hci_stack->gap_pairing_state; 2872 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2873 switch (state){ 2874 case GAP_PAIRING_STATE_SEND_PIN: 2875 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2876 break; 2877 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2878 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2879 break; 2880 case GAP_PAIRING_STATE_SEND_PASSKEY: 2881 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2882 break; 2883 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2884 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2885 break; 2886 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2887 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2888 break; 2889 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2890 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2891 break; 2892 default: 2893 break; 2894 } 2895 return; 2896 } 2897 #endif 2898 2899 #ifdef ENABLE_BLE 2900 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2901 if ((hci_stack->state == HCI_STATE_WORKING) 2902 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2903 2904 #ifdef ENABLE_LE_CENTRAL 2905 // handle le scan 2906 switch(hci_stack->le_scanning_state){ 2907 case LE_START_SCAN: 2908 hci_stack->le_scanning_state = LE_SCANNING; 2909 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2910 return; 2911 2912 case LE_STOP_SCAN: 2913 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2914 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2915 return; 2916 default: 2917 break; 2918 } 2919 if (hci_stack->le_scan_type != 0xff){ 2920 // defaults: active scanning, accept all advertisement packets 2921 int scan_type = hci_stack->le_scan_type; 2922 hci_stack->le_scan_type = 0xff; 2923 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); 2924 return; 2925 } 2926 #endif 2927 #ifdef ENABLE_LE_PERIPHERAL 2928 // le advertisement control 2929 if (hci_stack->le_advertisements_todo){ 2930 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2931 } 2932 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2933 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2934 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2935 return; 2936 } 2937 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2938 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2939 hci_send_cmd(&hci_le_set_advertising_parameters, 2940 hci_stack->le_advertisements_interval_min, 2941 hci_stack->le_advertisements_interval_max, 2942 hci_stack->le_advertisements_type, 2943 hci_stack->le_own_addr_type, 2944 hci_stack->le_advertisements_direct_address_type, 2945 hci_stack->le_advertisements_direct_address, 2946 hci_stack->le_advertisements_channel_map, 2947 hci_stack->le_advertisements_filter_policy); 2948 return; 2949 } 2950 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2951 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2952 uint8_t adv_data_clean[31]; 2953 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 2954 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 2955 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 2956 return; 2957 } 2958 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2959 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2960 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2961 hci_stack->le_scan_response_data); 2962 return; 2963 } 2964 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2965 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2966 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2967 return; 2968 } 2969 #endif 2970 2971 #ifdef ENABLE_LE_CENTRAL 2972 // 2973 // LE Whitelist Management 2974 // 2975 2976 // check if whitelist needs modification 2977 btstack_linked_list_iterator_t lit; 2978 int modification_pending = 0; 2979 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2980 while (btstack_linked_list_iterator_has_next(&lit)){ 2981 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2982 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2983 modification_pending = 1; 2984 break; 2985 } 2986 } 2987 2988 if (modification_pending){ 2989 // stop connnecting if modification pending 2990 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2991 hci_send_cmd(&hci_le_create_connection_cancel); 2992 return; 2993 } 2994 2995 // add/remove entries 2996 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2997 while (btstack_linked_list_iterator_has_next(&lit)){ 2998 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2999 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3000 entry->state = LE_WHITELIST_ON_CONTROLLER; 3001 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3002 return; 3003 3004 } 3005 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3006 bd_addr_t address; 3007 bd_addr_type_t address_type = entry->address_type; 3008 memcpy(address, entry->address, 6); 3009 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3010 btstack_memory_whitelist_entry_free(entry); 3011 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3012 return; 3013 } 3014 } 3015 } 3016 3017 // start connecting 3018 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3019 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3020 bd_addr_t null_addr; 3021 memset(null_addr, 0, 6); 3022 hci_send_cmd(&hci_le_create_connection, 3023 0x0060, // scan interval: 60 ms 3024 0x0030, // scan interval: 30 ms 3025 1, // use whitelist 3026 0, // peer address type 3027 null_addr, // peer bd addr 3028 hci_stack->le_own_addr_type, // our addr type: 3029 hci_stack->le_connection_interval_min, // conn interval min 3030 hci_stack->le_connection_interval_max, // conn interval max 3031 hci_stack->le_connection_latency, // conn latency 3032 hci_stack->le_supervision_timeout, // conn latency 3033 hci_stack->le_minimum_ce_length, // min ce length 3034 hci_stack->le_maximum_ce_length // max ce length 3035 ); 3036 return; 3037 } 3038 #endif 3039 } 3040 #endif 3041 3042 // send pending HCI commands 3043 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3044 hci_connection_t * connection = (hci_connection_t *) it; 3045 3046 switch(connection->state){ 3047 case SEND_CREATE_CONNECTION: 3048 switch(connection->address_type){ 3049 #ifdef ENABLE_CLASSIC 3050 case BD_ADDR_TYPE_CLASSIC: 3051 log_info("sending hci_create_connection"); 3052 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3053 break; 3054 #endif 3055 default: 3056 #ifdef ENABLE_BLE 3057 #ifdef ENABLE_LE_CENTRAL 3058 log_info("sending hci_le_create_connection"); 3059 hci_send_cmd(&hci_le_create_connection, 3060 0x0060, // scan interval: 60 ms 3061 0x0030, // scan interval: 30 ms 3062 0, // don't use whitelist 3063 connection->address_type, // peer address type 3064 connection->address, // peer bd addr 3065 hci_stack->le_own_addr_type, // our addr type: 3066 hci_stack->le_connection_interval_min, // conn interval min 3067 hci_stack->le_connection_interval_max, // conn interval max 3068 hci_stack->le_connection_latency, // conn latency 3069 hci_stack->le_supervision_timeout, // conn latency 3070 hci_stack->le_minimum_ce_length, // min ce length 3071 hci_stack->le_maximum_ce_length // max ce length 3072 ); 3073 connection->state = SENT_CREATE_CONNECTION; 3074 #endif 3075 #endif 3076 break; 3077 } 3078 return; 3079 3080 #ifdef ENABLE_CLASSIC 3081 case RECEIVED_CONNECTION_REQUEST: 3082 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3083 connection->state = ACCEPTED_CONNECTION_REQUEST; 3084 connection->role = HCI_ROLE_SLAVE; 3085 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3086 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3087 } 3088 return; 3089 #endif 3090 3091 #ifdef ENABLE_BLE 3092 #ifdef ENABLE_LE_CENTRAL 3093 case SEND_CANCEL_CONNECTION: 3094 connection->state = SENT_CANCEL_CONNECTION; 3095 hci_send_cmd(&hci_le_create_connection_cancel); 3096 return; 3097 #endif 3098 #endif 3099 case SEND_DISCONNECT: 3100 connection->state = SENT_DISCONNECT; 3101 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3102 return; 3103 3104 default: 3105 break; 3106 } 3107 3108 #ifdef ENABLE_CLASSIC 3109 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3110 log_info("responding to link key request"); 3111 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3112 link_key_t link_key; 3113 link_key_type_t link_key_type; 3114 if ( hci_stack->link_key_db 3115 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3116 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3117 connection->link_key_type = link_key_type; 3118 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3119 } else { 3120 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3121 } 3122 return; 3123 } 3124 3125 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3126 log_info("denying to pin request"); 3127 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3128 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3129 return; 3130 } 3131 3132 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3133 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3134 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3135 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3136 // tweak authentication requirements 3137 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3138 if (connection->bonding_flags & BONDING_DEDICATED){ 3139 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3140 } 3141 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3142 authreq |= 1; 3143 } 3144 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3145 } else { 3146 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3147 } 3148 return; 3149 } 3150 3151 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3152 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3153 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3154 return; 3155 } 3156 3157 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3158 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3159 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3160 return; 3161 } 3162 3163 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3164 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3165 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3166 return; 3167 } 3168 3169 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3170 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3171 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3172 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3173 return; 3174 } 3175 3176 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3177 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3178 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3179 return; 3180 } 3181 3182 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3183 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3184 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3185 return; 3186 } 3187 #endif 3188 3189 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3190 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3191 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3192 return; 3193 } 3194 3195 #ifdef ENABLE_BLE 3196 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3197 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3198 3199 uint16_t connection_interval_min = connection->le_conn_interval_min; 3200 connection->le_conn_interval_min = 0; 3201 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3202 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3203 0x0000, 0xffff); 3204 } 3205 #endif 3206 } 3207 3208 hci_connection_t * connection; 3209 switch (hci_stack->state){ 3210 case HCI_STATE_INITIALIZING: 3211 hci_initializing_run(); 3212 break; 3213 3214 case HCI_STATE_HALTING: 3215 3216 log_info("HCI_STATE_HALTING"); 3217 3218 // free whitelist entries 3219 #ifdef ENABLE_BLE 3220 #ifdef ENABLE_LE_CENTRAL 3221 { 3222 btstack_linked_list_iterator_t lit; 3223 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3224 while (btstack_linked_list_iterator_has_next(&lit)){ 3225 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3226 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3227 btstack_memory_whitelist_entry_free(entry); 3228 } 3229 } 3230 #endif 3231 #endif 3232 // close all open connections 3233 connection = (hci_connection_t *) hci_stack->connections; 3234 if (connection){ 3235 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3236 if (!hci_can_send_command_packet_now()) return; 3237 3238 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3239 3240 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3241 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3242 3243 // ... which would be ignored anyway as we shutdown (free) the connection now 3244 hci_shutdown_connection(connection); 3245 3246 // finally, send the disconnect command 3247 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3248 return; 3249 } 3250 log_info("HCI_STATE_HALTING, calling off"); 3251 3252 // switch mode 3253 hci_power_control_off(); 3254 3255 log_info("HCI_STATE_HALTING, emitting state"); 3256 hci_emit_state(); 3257 log_info("HCI_STATE_HALTING, done"); 3258 break; 3259 3260 case HCI_STATE_FALLING_ASLEEP: 3261 switch(hci_stack->substate) { 3262 case HCI_FALLING_ASLEEP_DISCONNECT: 3263 log_info("HCI_STATE_FALLING_ASLEEP"); 3264 // close all open connections 3265 connection = (hci_connection_t *) hci_stack->connections; 3266 3267 #ifdef HAVE_PLATFORM_IPHONE_OS 3268 // don't close connections, if H4 supports power management 3269 if (btstack_control_iphone_power_management_enabled()){ 3270 connection = NULL; 3271 } 3272 #endif 3273 if (connection){ 3274 3275 // send disconnect 3276 if (!hci_can_send_command_packet_now()) return; 3277 3278 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3279 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3280 3281 // send disconnected event right away - causes higher layer connections to get closed, too. 3282 hci_shutdown_connection(connection); 3283 return; 3284 } 3285 3286 if (hci_classic_supported()){ 3287 // disable page and inquiry scan 3288 if (!hci_can_send_command_packet_now()) return; 3289 3290 log_info("HCI_STATE_HALTING, disabling inq scans"); 3291 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3292 3293 // continue in next sub state 3294 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3295 break; 3296 } 3297 // no break - fall through for ble-only chips 3298 3299 case HCI_FALLING_ASLEEP_COMPLETE: 3300 log_info("HCI_STATE_HALTING, calling sleep"); 3301 #ifdef HAVE_PLATFORM_IPHONE_OS 3302 // don't actually go to sleep, if H4 supports power management 3303 if (btstack_control_iphone_power_management_enabled()){ 3304 // SLEEP MODE reached 3305 hci_stack->state = HCI_STATE_SLEEPING; 3306 hci_emit_state(); 3307 break; 3308 } 3309 #endif 3310 // switch mode 3311 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3312 hci_emit_state(); 3313 break; 3314 3315 default: 3316 break; 3317 } 3318 break; 3319 3320 default: 3321 break; 3322 } 3323 } 3324 3325 int hci_send_cmd_packet(uint8_t *packet, int size){ 3326 // house-keeping 3327 3328 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3329 hci_stack->loopback_mode = packet[3]; 3330 } 3331 3332 #ifdef ENABLE_CLASSIC 3333 bd_addr_t addr; 3334 hci_connection_t * conn; 3335 3336 // create_connection? 3337 if (IS_COMMAND(packet, hci_create_connection)){ 3338 reverse_bd_addr(&packet[3], addr); 3339 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3340 3341 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3342 if (!conn){ 3343 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3344 if (!conn){ 3345 // notify client that alloc failed 3346 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3347 return 0; // don't sent packet to controller 3348 } 3349 conn->state = SEND_CREATE_CONNECTION; 3350 } 3351 log_info("conn state %u", conn->state); 3352 switch (conn->state){ 3353 // if connection active exists 3354 case OPEN: 3355 // and OPEN, emit connection complete command, don't send to controller 3356 hci_emit_connection_complete(addr, conn->con_handle, 0); 3357 return 0; 3358 case SEND_CREATE_CONNECTION: 3359 // connection created by hci, e.g. dedicated bonding 3360 break; 3361 default: 3362 // otherwise, just ignore as it is already in the open process 3363 return 0; 3364 } 3365 conn->state = SENT_CREATE_CONNECTION; 3366 } 3367 3368 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3369 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3370 } 3371 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3372 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3373 } 3374 3375 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3376 if (hci_stack->link_key_db){ 3377 reverse_bd_addr(&packet[3], addr); 3378 hci_stack->link_key_db->delete_link_key(addr); 3379 } 3380 } 3381 3382 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3383 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3384 reverse_bd_addr(&packet[3], addr); 3385 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3386 if (conn){ 3387 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3388 } 3389 } 3390 3391 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3392 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3393 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3394 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3395 reverse_bd_addr(&packet[3], addr); 3396 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3397 if (conn){ 3398 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3399 } 3400 } 3401 3402 #ifdef ENABLE_SCO_OVER_HCI 3403 // setup_synchronous_connection? Voice setting at offset 22 3404 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3405 // TODO: compare to current setting if sco connection already active 3406 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3407 } 3408 // accept_synchronus_connection? Voice setting at offset 18 3409 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3410 // TODO: compare to current setting if sco connection already active 3411 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3412 } 3413 #endif 3414 #endif 3415 3416 #ifdef ENABLE_BLE 3417 #ifdef ENABLE_LE_PERIPHERAL 3418 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3419 hci_stack->le_random_address_set = 1; 3420 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3421 } 3422 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3423 hci_stack->le_advertisements_active = packet[3]; 3424 } 3425 #endif 3426 #ifdef ENABLE_LE_CENTRAL 3427 if (IS_COMMAND(packet, hci_le_create_connection)){ 3428 // white list used? 3429 uint8_t initiator_filter_policy = packet[7]; 3430 switch (initiator_filter_policy){ 3431 case 0: 3432 // whitelist not used 3433 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3434 break; 3435 case 1: 3436 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3437 break; 3438 default: 3439 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3440 break; 3441 } 3442 } 3443 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3444 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3445 } 3446 #endif 3447 #endif 3448 3449 hci_stack->num_cmd_packets--; 3450 3451 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3452 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3453 3454 // release packet buffer for synchronous transport implementations 3455 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3456 hci_stack->hci_packet_buffer_reserved = 0; 3457 } 3458 3459 return err; 3460 } 3461 3462 // disconnect because of security block 3463 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3464 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3465 if (!connection) return; 3466 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3467 } 3468 3469 3470 // Configure Secure Simple Pairing 3471 3472 #ifdef ENABLE_CLASSIC 3473 3474 // enable will enable SSP during init 3475 void gap_ssp_set_enable(int enable){ 3476 hci_stack->ssp_enable = enable; 3477 } 3478 3479 static int hci_local_ssp_activated(void){ 3480 return gap_ssp_supported() && hci_stack->ssp_enable; 3481 } 3482 3483 // if set, BTstack will respond to io capability request using authentication requirement 3484 void gap_ssp_set_io_capability(int io_capability){ 3485 hci_stack->ssp_io_capability = io_capability; 3486 } 3487 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3488 hci_stack->ssp_authentication_requirement = authentication_requirement; 3489 } 3490 3491 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3492 void gap_ssp_set_auto_accept(int auto_accept){ 3493 hci_stack->ssp_auto_accept = auto_accept; 3494 } 3495 #endif 3496 3497 // va_list part of hci_send_cmd 3498 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3499 if (!hci_can_send_command_packet_now()){ 3500 log_error("hci_send_cmd called but cannot send packet now"); 3501 return 0; 3502 } 3503 3504 // for HCI INITIALIZATION 3505 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3506 hci_stack->last_cmd_opcode = cmd->opcode; 3507 3508 hci_reserve_packet_buffer(); 3509 uint8_t * packet = hci_stack->hci_packet_buffer; 3510 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3511 return hci_send_cmd_packet(packet, size); 3512 } 3513 3514 /** 3515 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3516 */ 3517 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3518 va_list argptr; 3519 va_start(argptr, cmd); 3520 int res = hci_send_cmd_va_arg(cmd, argptr); 3521 va_end(argptr); 3522 return res; 3523 } 3524 3525 // Create various non-HCI events. 3526 // TODO: generalize, use table similar to hci_create_command 3527 3528 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3529 // dump packet 3530 if (dump) { 3531 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3532 } 3533 3534 // dispatch to all event handlers 3535 btstack_linked_list_iterator_t it; 3536 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3537 while (btstack_linked_list_iterator_has_next(&it)){ 3538 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3539 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3540 } 3541 } 3542 3543 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3544 if (!hci_stack->acl_packet_handler) return; 3545 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3546 } 3547 3548 #ifdef ENABLE_CLASSIC 3549 static void hci_notify_if_sco_can_send_now(void){ 3550 // notify SCO sender if waiting 3551 if (!hci_stack->sco_waiting_for_can_send_now) return; 3552 if (hci_can_send_sco_packet_now()){ 3553 hci_stack->sco_waiting_for_can_send_now = 0; 3554 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3555 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3556 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3557 } 3558 } 3559 3560 // parsing end emitting has been merged to reduce code size 3561 static void gap_inquiry_explode(uint8_t * packet){ 3562 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3563 3564 uint8_t * eir_data; 3565 ad_context_t context; 3566 const uint8_t * name; 3567 uint8_t name_len; 3568 3569 int event_type = hci_event_packet_get_type(packet); 3570 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3571 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3572 3573 // event[1] is set at the end 3574 int i; 3575 for (i=0; i<num_responses;i++){ 3576 memset(event, 0, sizeof(event)); 3577 event[0] = GAP_EVENT_INQUIRY_RESULT; 3578 uint8_t event_size = 18; // if name is not set by EIR 3579 3580 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3581 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3582 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3583 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3584 3585 switch (event_type){ 3586 case HCI_EVENT_INQUIRY_RESULT: 3587 // 14,15,16,17 = 0, size 18 3588 break; 3589 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3590 event[14] = 1; 3591 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3592 // 16,17 = 0, size 18 3593 break; 3594 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3595 event[14] = 1; 3596 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3597 // for EIR packets, there is only one reponse in it 3598 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3599 name = NULL; 3600 // EIR data is 240 bytes in EIR event 3601 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3602 uint8_t data_type = ad_iterator_get_data_type(&context); 3603 uint8_t data_size = ad_iterator_get_data_len(&context); 3604 const uint8_t * data = ad_iterator_get_data(&context); 3605 // Prefer Complete Local Name over Shortend Local Name 3606 switch (data_type){ 3607 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3608 if (name) continue; 3609 /* explicit fall-through */ 3610 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3611 name = data; 3612 name_len = data_size; 3613 break; 3614 default: 3615 break; 3616 } 3617 } 3618 if (name){ 3619 event[16] = 1; 3620 // truncate name if needed 3621 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3622 event[17] = len; 3623 memcpy(&event[18], name, len); 3624 event_size += len; 3625 } 3626 break; 3627 } 3628 event[1] = event_size - 2; 3629 hci_emit_event(event, event_size, 1); 3630 } 3631 } 3632 #endif 3633 3634 void hci_emit_state(void){ 3635 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3636 uint8_t event[3]; 3637 event[0] = BTSTACK_EVENT_STATE; 3638 event[1] = sizeof(event) - 2; 3639 event[2] = hci_stack->state; 3640 hci_emit_event(event, sizeof(event), 1); 3641 } 3642 3643 #ifdef ENABLE_CLASSIC 3644 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3645 uint8_t event[13]; 3646 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3647 event[1] = sizeof(event) - 2; 3648 event[2] = status; 3649 little_endian_store_16(event, 3, con_handle); 3650 reverse_bd_addr(address, &event[5]); 3651 event[11] = 1; // ACL connection 3652 event[12] = 0; // encryption disabled 3653 hci_emit_event(event, sizeof(event), 1); 3654 } 3655 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3656 if (disable_l2cap_timeouts) return; 3657 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3658 uint8_t event[4]; 3659 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3660 event[1] = sizeof(event) - 2; 3661 little_endian_store_16(event, 2, conn->con_handle); 3662 hci_emit_event(event, sizeof(event), 1); 3663 } 3664 #endif 3665 3666 #ifdef ENABLE_BLE 3667 #ifdef ENABLE_LE_CENTRAL 3668 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3669 uint8_t event[21]; 3670 event[0] = HCI_EVENT_LE_META; 3671 event[1] = sizeof(event) - 2; 3672 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3673 event[3] = status; 3674 little_endian_store_16(event, 4, con_handle); 3675 event[6] = 0; // TODO: role 3676 event[7] = address_type; 3677 reverse_bd_addr(address, &event[8]); 3678 little_endian_store_16(event, 14, 0); // interval 3679 little_endian_store_16(event, 16, 0); // latency 3680 little_endian_store_16(event, 18, 0); // supervision timeout 3681 event[20] = 0; // master clock accuracy 3682 hci_emit_event(event, sizeof(event), 1); 3683 } 3684 #endif 3685 #endif 3686 3687 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3688 uint8_t event[6]; 3689 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3690 event[1] = sizeof(event) - 2; 3691 event[2] = 0; // status = OK 3692 little_endian_store_16(event, 3, con_handle); 3693 event[5] = reason; 3694 hci_emit_event(event, sizeof(event), 1); 3695 } 3696 3697 static void hci_emit_nr_connections_changed(void){ 3698 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3699 uint8_t event[3]; 3700 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3701 event[1] = sizeof(event) - 2; 3702 event[2] = nr_hci_connections(); 3703 hci_emit_event(event, sizeof(event), 1); 3704 } 3705 3706 static void hci_emit_hci_open_failed(void){ 3707 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3708 uint8_t event[2]; 3709 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3710 event[1] = sizeof(event) - 2; 3711 hci_emit_event(event, sizeof(event), 1); 3712 } 3713 3714 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3715 log_info("hci_emit_dedicated_bonding_result %u ", status); 3716 uint8_t event[9]; 3717 int pos = 0; 3718 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3719 event[pos++] = sizeof(event) - 2; 3720 event[pos++] = status; 3721 reverse_bd_addr(address, &event[pos]); 3722 hci_emit_event(event, sizeof(event), 1); 3723 } 3724 3725 3726 #ifdef ENABLE_CLASSIC 3727 3728 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3729 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3730 uint8_t event[5]; 3731 int pos = 0; 3732 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3733 event[pos++] = sizeof(event) - 2; 3734 little_endian_store_16(event, 2, con_handle); 3735 pos += 2; 3736 event[pos++] = level; 3737 hci_emit_event(event, sizeof(event), 1); 3738 } 3739 3740 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3741 if (!connection) return LEVEL_0; 3742 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3743 return gap_security_level_for_link_key_type(connection->link_key_type); 3744 } 3745 3746 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3747 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3748 uint8_t event[3]; 3749 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3750 event[1] = sizeof(event) - 2; 3751 event[2] = enabled; 3752 hci_emit_event(event, sizeof(event), 1); 3753 } 3754 3755 #ifdef ENABLE_CLASSIC 3756 // query if remote side supports eSCO 3757 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3758 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3759 if (!connection) return 0; 3760 return connection->remote_supported_feature_eSCO; 3761 } 3762 3763 // query if remote side supports SSP 3764 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3765 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3766 if (!connection) return 0; 3767 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3768 } 3769 3770 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3771 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3772 } 3773 #endif 3774 3775 // GAP API 3776 /** 3777 * @bbrief enable/disable bonding. default is enabled 3778 * @praram enabled 3779 */ 3780 void gap_set_bondable_mode(int enable){ 3781 hci_stack->bondable = enable ? 1 : 0; 3782 } 3783 /** 3784 * @brief Get bondable mode. 3785 * @return 1 if bondable 3786 */ 3787 int gap_get_bondable_mode(void){ 3788 return hci_stack->bondable; 3789 } 3790 3791 /** 3792 * @brief map link keys to security levels 3793 */ 3794 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3795 switch (link_key_type){ 3796 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3797 return LEVEL_4; 3798 case COMBINATION_KEY: 3799 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3800 return LEVEL_3; 3801 default: 3802 return LEVEL_2; 3803 } 3804 } 3805 3806 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3807 log_info("gap_mitm_protection_required_for_security_level %u", level); 3808 return level > LEVEL_2; 3809 } 3810 3811 /** 3812 * @brief get current security level 3813 */ 3814 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3815 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3816 if (!connection) return LEVEL_0; 3817 return gap_security_level_for_connection(connection); 3818 } 3819 3820 /** 3821 * @brief request connection to device to 3822 * @result GAP_AUTHENTICATION_RESULT 3823 */ 3824 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3825 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3826 if (!connection){ 3827 hci_emit_security_level(con_handle, LEVEL_0); 3828 return; 3829 } 3830 gap_security_level_t current_level = gap_security_level(con_handle); 3831 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3832 if (current_level >= requested_level){ 3833 hci_emit_security_level(con_handle, current_level); 3834 return; 3835 } 3836 3837 connection->requested_security_level = requested_level; 3838 3839 #if 0 3840 // sending encryption request without a link key results in an error. 3841 // TODO: figure out how to use it properly 3842 3843 // would enabling ecnryption suffice (>= LEVEL_2)? 3844 if (hci_stack->link_key_db){ 3845 link_key_type_t link_key_type; 3846 link_key_t link_key; 3847 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3848 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3849 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3850 return; 3851 } 3852 } 3853 } 3854 #endif 3855 3856 // try to authenticate connection 3857 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3858 hci_run(); 3859 } 3860 3861 /** 3862 * @brief start dedicated bonding with device. disconnect after bonding 3863 * @param device 3864 * @param request MITM protection 3865 * @result GAP_DEDICATED_BONDING_COMPLETE 3866 */ 3867 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3868 3869 // create connection state machine 3870 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3871 3872 if (!connection){ 3873 return BTSTACK_MEMORY_ALLOC_FAILED; 3874 } 3875 3876 // delete linkn key 3877 gap_drop_link_key_for_bd_addr(device); 3878 3879 // configure LEVEL_2/3, dedicated bonding 3880 connection->state = SEND_CREATE_CONNECTION; 3881 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3882 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3883 connection->bonding_flags = BONDING_DEDICATED; 3884 3885 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3886 3887 // handle: connnection failure (connection complete != ok) 3888 // handle: authentication failure 3889 // handle: disconnect on done 3890 3891 hci_run(); 3892 3893 return 0; 3894 } 3895 #endif 3896 3897 void gap_set_local_name(const char * local_name){ 3898 hci_stack->local_name = local_name; 3899 } 3900 3901 3902 #ifdef ENABLE_BLE 3903 3904 #ifdef ENABLE_LE_CENTRAL 3905 void gap_start_scan(void){ 3906 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3907 hci_stack->le_scanning_state = LE_START_SCAN; 3908 hci_run(); 3909 } 3910 3911 void gap_stop_scan(void){ 3912 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3913 hci_stack->le_scanning_state = LE_STOP_SCAN; 3914 hci_run(); 3915 } 3916 3917 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3918 hci_stack->le_scan_type = scan_type; 3919 hci_stack->le_scan_interval = scan_interval; 3920 hci_stack->le_scan_window = scan_window; 3921 hci_run(); 3922 } 3923 3924 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3925 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3926 if (!conn){ 3927 log_info("gap_connect: no connection exists yet, creating context"); 3928 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3929 if (!conn){ 3930 // notify client that alloc failed 3931 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3932 log_info("gap_connect: failed to alloc hci_connection_t"); 3933 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3934 } 3935 conn->state = SEND_CREATE_CONNECTION; 3936 log_info("gap_connect: send create connection next"); 3937 hci_run(); 3938 return 0; 3939 } 3940 3941 if (!hci_is_le_connection(conn) || 3942 conn->state == SEND_CREATE_CONNECTION || 3943 conn->state == SENT_CREATE_CONNECTION) { 3944 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3945 log_error("gap_connect: classic connection or connect is already being created"); 3946 return GATT_CLIENT_IN_WRONG_STATE; 3947 } 3948 3949 log_info("gap_connect: context exists with state %u", conn->state); 3950 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3951 hci_run(); 3952 return 0; 3953 } 3954 3955 // @assumption: only a single outgoing LE Connection exists 3956 static hci_connection_t * gap_get_outgoing_connection(void){ 3957 btstack_linked_item_t *it; 3958 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3959 hci_connection_t * conn = (hci_connection_t *) it; 3960 if (!hci_is_le_connection(conn)) continue; 3961 switch (conn->state){ 3962 case SEND_CREATE_CONNECTION: 3963 case SENT_CREATE_CONNECTION: 3964 return conn; 3965 default: 3966 break; 3967 }; 3968 } 3969 return NULL; 3970 } 3971 3972 uint8_t gap_connect_cancel(void){ 3973 hci_connection_t * conn = gap_get_outgoing_connection(); 3974 if (!conn) return 0; 3975 switch (conn->state){ 3976 case SEND_CREATE_CONNECTION: 3977 // skip sending create connection and emit event instead 3978 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3979 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3980 btstack_memory_hci_connection_free( conn ); 3981 break; 3982 case SENT_CREATE_CONNECTION: 3983 // request to send cancel connection 3984 conn->state = SEND_CANCEL_CONNECTION; 3985 hci_run(); 3986 break; 3987 default: 3988 break; 3989 } 3990 return 0; 3991 } 3992 #endif 3993 3994 #ifdef ENABLE_LE_CENTRAL 3995 /** 3996 * @brief Set connection parameters for outgoing connections 3997 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 3998 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 3999 * @param conn_latency, default: 4 4000 * @param supervision_timeout (unit: 10ms), default: 720 ms 4001 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4002 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4003 */ 4004 4005 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 4006 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4007 hci_stack->le_connection_interval_min = conn_interval_min; 4008 hci_stack->le_connection_interval_max = conn_interval_max; 4009 hci_stack->le_connection_latency = conn_latency; 4010 hci_stack->le_supervision_timeout = supervision_timeout; 4011 hci_stack->le_minimum_ce_length = min_ce_length; 4012 hci_stack->le_maximum_ce_length = max_ce_length; 4013 } 4014 #endif 4015 4016 /** 4017 * @brief Updates the connection parameters for a given LE connection 4018 * @param handle 4019 * @param conn_interval_min (unit: 1.25ms) 4020 * @param conn_interval_max (unit: 1.25ms) 4021 * @param conn_latency 4022 * @param supervision_timeout (unit: 10ms) 4023 * @returns 0 if ok 4024 */ 4025 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4026 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4027 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4028 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4029 connection->le_conn_interval_min = conn_interval_min; 4030 connection->le_conn_interval_max = conn_interval_max; 4031 connection->le_conn_latency = conn_latency; 4032 connection->le_supervision_timeout = supervision_timeout; 4033 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4034 hci_run(); 4035 return 0; 4036 } 4037 4038 /** 4039 * @brief Request an update of the connection parameter for a given LE connection 4040 * @param handle 4041 * @param conn_interval_min (unit: 1.25ms) 4042 * @param conn_interval_max (unit: 1.25ms) 4043 * @param conn_latency 4044 * @param supervision_timeout (unit: 10ms) 4045 * @returns 0 if ok 4046 */ 4047 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4048 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4049 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4050 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4051 connection->le_conn_interval_min = conn_interval_min; 4052 connection->le_conn_interval_max = conn_interval_max; 4053 connection->le_conn_latency = conn_latency; 4054 connection->le_supervision_timeout = supervision_timeout; 4055 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4056 hci_run(); 4057 return 0; 4058 } 4059 4060 #ifdef ENABLE_LE_PERIPHERAL 4061 4062 static void gap_advertisments_changed(void){ 4063 // disable advertisements before updating adv, scan data, or adv params 4064 if (hci_stack->le_advertisements_active){ 4065 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4066 } 4067 hci_run(); 4068 } 4069 4070 /** 4071 * @brief Set Advertisement Data 4072 * @param advertising_data_length 4073 * @param advertising_data (max 31 octets) 4074 * @note data is not copied, pointer has to stay valid 4075 */ 4076 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4077 hci_stack->le_advertisements_data_len = advertising_data_length; 4078 hci_stack->le_advertisements_data = advertising_data; 4079 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4080 gap_advertisments_changed(); 4081 } 4082 4083 /** 4084 * @brief Set Scan Response Data 4085 * @param advertising_data_length 4086 * @param advertising_data (max 31 octets) 4087 * @note data is not copied, pointer has to stay valid 4088 */ 4089 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4090 hci_stack->le_scan_response_data_len = scan_response_data_length; 4091 hci_stack->le_scan_response_data = scan_response_data; 4092 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4093 gap_advertisments_changed(); 4094 } 4095 4096 /** 4097 * @brief Set Advertisement Parameters 4098 * @param adv_int_min 4099 * @param adv_int_max 4100 * @param adv_type 4101 * @param direct_address_type 4102 * @param direct_address 4103 * @param channel_map 4104 * @param filter_policy 4105 * 4106 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4107 */ 4108 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4109 uint8_t direct_address_typ, bd_addr_t direct_address, 4110 uint8_t channel_map, uint8_t filter_policy) { 4111 4112 hci_stack->le_advertisements_interval_min = adv_int_min; 4113 hci_stack->le_advertisements_interval_max = adv_int_max; 4114 hci_stack->le_advertisements_type = adv_type; 4115 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4116 hci_stack->le_advertisements_channel_map = channel_map; 4117 hci_stack->le_advertisements_filter_policy = filter_policy; 4118 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4119 4120 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4121 gap_advertisments_changed(); 4122 } 4123 4124 /** 4125 * @brief Enable/Disable Advertisements 4126 * @param enabled 4127 */ 4128 void gap_advertisements_enable(int enabled){ 4129 hci_stack->le_advertisements_enabled = enabled; 4130 if (enabled && !hci_stack->le_advertisements_active){ 4131 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4132 } 4133 if (!enabled && hci_stack->le_advertisements_active){ 4134 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4135 } 4136 hci_run(); 4137 } 4138 4139 #endif 4140 4141 void hci_le_set_own_address_type(uint8_t own_address_type){ 4142 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4143 if (own_address_type == hci_stack->le_own_addr_type) return; 4144 hci_stack->le_own_addr_type = own_address_type; 4145 4146 #ifdef ENABLE_LE_PERIPHERAL 4147 // update advertisement parameters, too 4148 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4149 gap_advertisments_changed(); 4150 #endif 4151 #ifdef ENABLE_LE_CENTRAL 4152 // note: we don't update scan parameters or modify ongoing connection attempts 4153 #endif 4154 } 4155 4156 #endif 4157 4158 uint8_t gap_disconnect(hci_con_handle_t handle){ 4159 hci_connection_t * conn = hci_connection_for_handle(handle); 4160 if (!conn){ 4161 hci_emit_disconnection_complete(handle, 0); 4162 return 0; 4163 } 4164 conn->state = SEND_DISCONNECT; 4165 hci_run(); 4166 return 0; 4167 } 4168 4169 /** 4170 * @brief Get connection type 4171 * @param con_handle 4172 * @result connection_type 4173 */ 4174 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4175 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4176 if (!conn) return GAP_CONNECTION_INVALID; 4177 switch (conn->address_type){ 4178 case BD_ADDR_TYPE_LE_PUBLIC: 4179 case BD_ADDR_TYPE_LE_RANDOM: 4180 return GAP_CONNECTION_LE; 4181 case BD_ADDR_TYPE_SCO: 4182 return GAP_CONNECTION_SCO; 4183 case BD_ADDR_TYPE_CLASSIC: 4184 return GAP_CONNECTION_ACL; 4185 default: 4186 return GAP_CONNECTION_INVALID; 4187 } 4188 } 4189 4190 #ifdef ENABLE_BLE 4191 4192 #ifdef ENABLE_LE_CENTRAL 4193 /** 4194 * @brief Auto Connection Establishment - Start Connecting to device 4195 * @param address_typ 4196 * @param address 4197 * @returns 0 if ok 4198 */ 4199 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4200 // check capacity 4201 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4202 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4203 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4204 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4205 entry->address_type = address_type; 4206 memcpy(entry->address, address, 6); 4207 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4208 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4209 hci_run(); 4210 return 0; 4211 } 4212 4213 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4214 btstack_linked_list_iterator_t it; 4215 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4216 while (btstack_linked_list_iterator_has_next(&it)){ 4217 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4218 if (entry->address_type != address_type) continue; 4219 if (memcmp(entry->address, address, 6) != 0) continue; 4220 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4221 // remove from controller if already present 4222 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4223 continue; 4224 } 4225 // direclty remove entry from whitelist 4226 btstack_linked_list_iterator_remove(&it); 4227 btstack_memory_whitelist_entry_free(entry); 4228 } 4229 } 4230 4231 /** 4232 * @brief Auto Connection Establishment - Stop Connecting to device 4233 * @param address_typ 4234 * @param address 4235 * @returns 0 if ok 4236 */ 4237 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4238 hci_remove_from_whitelist(address_type, address); 4239 hci_run(); 4240 return 0; 4241 } 4242 4243 /** 4244 * @brief Auto Connection Establishment - Stop everything 4245 * @note Convenience function to stop all active auto connection attempts 4246 */ 4247 void gap_auto_connection_stop_all(void){ 4248 btstack_linked_list_iterator_t it; 4249 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4250 while (btstack_linked_list_iterator_has_next(&it)){ 4251 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4252 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4253 // remove from controller if already present 4254 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4255 continue; 4256 } 4257 // directly remove entry from whitelist 4258 btstack_linked_list_iterator_remove(&it); 4259 btstack_memory_whitelist_entry_free(entry); 4260 } 4261 hci_run(); 4262 } 4263 #endif 4264 #endif 4265 4266 #ifdef ENABLE_CLASSIC 4267 /** 4268 * @brief Set Extended Inquiry Response data 4269 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4270 * @note has to be done before stack starts up 4271 */ 4272 void gap_set_extended_inquiry_response(const uint8_t * data){ 4273 hci_stack->eir_data = data; 4274 } 4275 4276 /** 4277 * @brief Start GAP Classic Inquiry 4278 * @param duration in 1.28s units 4279 * @return 0 if ok 4280 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4281 */ 4282 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4283 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4284 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4285 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4286 } 4287 hci_stack->inquiry_state = duration_in_1280ms_units; 4288 hci_run(); 4289 return 0; 4290 } 4291 4292 /** 4293 * @brief Stop GAP Classic Inquiry 4294 * @returns 0 if ok 4295 */ 4296 int gap_inquiry_stop(void){ 4297 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4298 // emit inquiry complete event, before it even started 4299 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4300 hci_emit_event(event, sizeof(event), 1); 4301 return 0; 4302 } 4303 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4304 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4305 hci_run(); 4306 return 0; 4307 } 4308 4309 4310 /** 4311 * @brief Remote Name Request 4312 * @param addr 4313 * @param page_scan_repetition_mode 4314 * @param clock_offset only used when bit 15 is set 4315 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4316 */ 4317 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4318 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4319 memcpy(hci_stack->remote_name_addr, addr, 6); 4320 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4321 hci_stack->remote_name_clock_offset = clock_offset; 4322 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4323 hci_run(); 4324 return 0; 4325 } 4326 4327 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4328 hci_stack->gap_pairing_state = state; 4329 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4330 hci_run(); 4331 return 0; 4332 } 4333 4334 /** 4335 * @brief Legacy Pairing Pin Code Response 4336 * @param addr 4337 * @param pin 4338 * @return 0 if ok 4339 */ 4340 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4341 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4342 hci_stack->gap_pairing_pin = pin; 4343 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4344 } 4345 4346 /** 4347 * @brief Abort Legacy Pairing 4348 * @param addr 4349 * @param pin 4350 * @return 0 if ok 4351 */ 4352 int gap_pin_code_negative(bd_addr_t addr){ 4353 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4354 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4355 } 4356 4357 /** 4358 * @brief SSP Passkey Response 4359 * @param addr 4360 * @param passkey 4361 * @return 0 if ok 4362 */ 4363 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4364 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4365 hci_stack->gap_pairing_passkey = passkey; 4366 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4367 } 4368 4369 /** 4370 * @brief Abort SSP Passkey Entry/Pairing 4371 * @param addr 4372 * @param pin 4373 * @return 0 if ok 4374 */ 4375 int gap_ssp_passkey_negative(bd_addr_t addr){ 4376 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4377 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4378 } 4379 4380 /** 4381 * @brief Accept SSP Numeric Comparison 4382 * @param addr 4383 * @param passkey 4384 * @return 0 if ok 4385 */ 4386 int gap_ssp_confirmation_response(bd_addr_t addr){ 4387 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4388 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4389 } 4390 4391 /** 4392 * @brief Abort SSP Numeric Comparison/Pairing 4393 * @param addr 4394 * @param pin 4395 * @return 0 if ok 4396 */ 4397 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4398 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4399 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4400 } 4401 4402 /** 4403 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4404 * @param inquiry_mode see bluetooth_defines.h 4405 */ 4406 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4407 hci_stack->inquiry_mode = mode; 4408 } 4409 4410 /** 4411 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4412 */ 4413 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4414 hci_stack->sco_voice_setting = voice_setting; 4415 } 4416 4417 /** 4418 * @brief Get SCO Voice Setting 4419 * @return current voice setting 4420 */ 4421 uint16_t hci_get_sco_voice_setting(void){ 4422 return hci_stack->sco_voice_setting; 4423 } 4424 4425 /** @brief Get SCO packet length for current SCO Voice setting 4426 * @note Using SCO packets of the exact length is required for USB transfer 4427 * @return Length of SCO packets in bytes (not audio frames) 4428 */ 4429 int hci_get_sco_packet_length(void){ 4430 // see Core Spec for H2 USB Transfer. 4431 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4432 return 27; 4433 } 4434 #endif 4435 4436 4437 HCI_STATE hci_get_state(void){ 4438 return hci_stack->state; 4439 } 4440 4441 4442 /** 4443 * @brief Set callback for Bluetooth Hardware Error 4444 */ 4445 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4446 hci_stack->hardware_error_callback = fn; 4447 } 4448 4449 void hci_disconnect_all(void){ 4450 btstack_linked_list_iterator_t it; 4451 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4452 while (btstack_linked_list_iterator_has_next(&it)){ 4453 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4454 if (con->state == SENT_DISCONNECT) continue; 4455 con->state = SEND_DISCONNECT; 4456 } 4457 hci_run(); 4458 } 4459 4460 uint16_t hci_get_manufacturer(void){ 4461 return hci_stack->manufacturer; 4462 } 4463