1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 147 static void hci_emit_nr_connections_changed(void); 148 static void hci_emit_hci_open_failed(void); 149 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 150 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 151 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 152 static void hci_run(void); 153 static int hci_is_le_connection(hci_connection_t * connection); 154 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 155 156 #ifdef ENABLE_BLE 157 #ifdef ENABLE_LE_CENTRAL 158 // called from test/ble_client/advertising_data_parser.c 159 void le_handle_advertisement_report(uint8_t *packet, int size); 160 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 161 #endif 162 #endif 163 164 // the STACK is here 165 #ifndef HAVE_MALLOC 166 static hci_stack_t hci_stack_static; 167 #endif 168 static hci_stack_t * hci_stack = NULL; 169 170 #ifdef ENABLE_CLASSIC 171 // test helper 172 static uint8_t disable_l2cap_timeouts = 0; 173 #endif 174 175 /** 176 * create connection for given address 177 * 178 * @return connection OR NULL, if no memory left 179 */ 180 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 181 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 182 hci_connection_t * conn = btstack_memory_hci_connection_get(); 183 if (!conn) return NULL; 184 memset(conn, 0, sizeof(hci_connection_t)); 185 bd_addr_copy(conn->address, addr); 186 conn->address_type = addr_type; 187 conn->con_handle = 0xffff; 188 conn->authentication_flags = AUTH_FLAGS_NONE; 189 conn->bonding_flags = 0; 190 conn->requested_security_level = LEVEL_0; 191 #ifdef ENABLE_CLASSIC 192 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 193 btstack_run_loop_set_timer_context(&conn->timeout, conn); 194 hci_connection_timestamp(conn); 195 #endif 196 conn->acl_recombination_length = 0; 197 conn->acl_recombination_pos = 0; 198 conn->num_acl_packets_sent = 0; 199 conn->num_sco_packets_sent = 0; 200 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 201 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 202 return conn; 203 } 204 205 206 /** 207 * get le connection parameter range 208 * 209 * @return le connection parameter range struct 210 */ 211 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 212 *range = hci_stack->le_connection_parameter_range; 213 } 214 215 /** 216 * set le connection parameter range 217 * 218 */ 219 220 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 221 hci_stack->le_connection_parameter_range = *range; 222 } 223 224 /** 225 * get hci connections iterator 226 * 227 * @return hci connections iterator 228 */ 229 230 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 231 btstack_linked_list_iterator_init(it, &hci_stack->connections); 232 } 233 234 /** 235 * get connection for a given handle 236 * 237 * @return connection OR NULL, if not found 238 */ 239 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 240 btstack_linked_list_iterator_t it; 241 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 242 while (btstack_linked_list_iterator_has_next(&it)){ 243 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 244 if ( item->con_handle == con_handle ) { 245 return item; 246 } 247 } 248 return NULL; 249 } 250 251 /** 252 * get connection for given address 253 * 254 * @return connection OR NULL, if not found 255 */ 256 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 257 btstack_linked_list_iterator_t it; 258 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 259 while (btstack_linked_list_iterator_has_next(&it)){ 260 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 261 if (connection->address_type != addr_type) continue; 262 if (memcmp(addr, connection->address, 6) != 0) continue; 263 return connection; 264 } 265 return NULL; 266 } 267 268 269 #ifdef ENABLE_CLASSIC 270 271 #ifdef ENABLE_SCO_OVER_HCI 272 static int hci_number_sco_connections(void){ 273 int connections = 0; 274 btstack_linked_list_iterator_t it; 275 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 276 while (btstack_linked_list_iterator_has_next(&it)){ 277 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 278 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 279 connections++; 280 } 281 return connections; 282 } 283 #endif 284 285 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 286 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 287 #ifdef HAVE_EMBEDDED_TICK 288 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 289 // connections might be timed out 290 hci_emit_l2cap_check_timeout(connection); 291 } 292 #else 293 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 294 // connections might be timed out 295 hci_emit_l2cap_check_timeout(connection); 296 } 297 #endif 298 } 299 300 static void hci_connection_timestamp(hci_connection_t *connection){ 301 #ifdef HAVE_EMBEDDED_TICK 302 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 303 #else 304 connection->timestamp = btstack_run_loop_get_time_ms(); 305 #endif 306 } 307 308 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 309 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 310 } 311 312 313 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 314 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 315 } 316 317 /** 318 * add authentication flags and reset timer 319 * @note: assumes classic connection 320 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 321 */ 322 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 323 bd_addr_t addr; 324 reverse_bd_addr(bd_addr, addr); 325 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 326 if (conn) { 327 connectionSetAuthenticationFlags(conn, flags); 328 hci_connection_timestamp(conn); 329 } 330 } 331 332 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 333 hci_connection_t * conn = hci_connection_for_handle(handle); 334 if (!conn) return 0; 335 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 336 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 337 return 0; 338 } 339 340 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 341 if (!hci_stack->link_key_db) return; 342 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 343 hci_stack->link_key_db->delete_link_key(addr); 344 } 345 346 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 347 if (!hci_stack->link_key_db) return; 348 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 349 hci_stack->link_key_db->put_link_key(addr, link_key, type); 350 } 351 #endif 352 353 static int hci_is_le_connection(hci_connection_t * connection){ 354 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 355 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 356 } 357 358 /** 359 * count connections 360 */ 361 static int nr_hci_connections(void){ 362 int count = 0; 363 btstack_linked_item_t *it; 364 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 365 return count; 366 } 367 368 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 369 370 unsigned int num_packets_sent_classic = 0; 371 unsigned int num_packets_sent_le = 0; 372 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 377 num_packets_sent_classic += connection->num_acl_packets_sent; 378 } else { 379 num_packets_sent_le += connection->num_acl_packets_sent; 380 } 381 } 382 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 383 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 384 int free_slots_le = 0; 385 386 if (free_slots_classic < 0){ 387 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 388 return 0; 389 } 390 391 if (hci_stack->le_acl_packets_total_num){ 392 // if we have LE slots, they are used 393 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 394 if (free_slots_le < 0){ 395 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 396 return 0; 397 } 398 } else { 399 // otherwise, classic slots are used for LE, too 400 free_slots_classic -= num_packets_sent_le; 401 if (free_slots_classic < 0){ 402 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 403 return 0; 404 } 405 } 406 407 switch (address_type){ 408 case BD_ADDR_TYPE_UNKNOWN: 409 log_error("hci_number_free_acl_slots: unknown address type"); 410 return 0; 411 412 case BD_ADDR_TYPE_CLASSIC: 413 return free_slots_classic; 414 415 default: 416 if (hci_stack->le_acl_packets_total_num){ 417 return free_slots_le; 418 } 419 return free_slots_classic; 420 } 421 } 422 423 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 424 // get connection type 425 hci_connection_t * connection = hci_connection_for_handle(con_handle); 426 if (!connection){ 427 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 428 return 0; 429 } 430 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 431 } 432 433 #ifdef ENABLE_CLASSIC 434 static int hci_number_free_sco_slots(void){ 435 unsigned int num_sco_packets_sent = 0; 436 btstack_linked_item_t *it; 437 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 438 hci_connection_t * connection = (hci_connection_t *) it; 439 num_sco_packets_sent += connection->num_sco_packets_sent; 440 } 441 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 442 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 443 return 0; 444 } 445 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 446 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 447 } 448 #endif 449 450 // only used to send HCI Host Number Completed Packets 451 static int hci_can_send_comand_packet_transport(void){ 452 if (hci_stack->hci_packet_buffer_reserved) return 0; 453 454 // check for async hci transport implementations 455 if (hci_stack->hci_transport->can_send_packet_now){ 456 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 457 return 0; 458 } 459 } 460 return 1; 461 } 462 463 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 464 int hci_can_send_command_packet_now(void){ 465 if (hci_can_send_comand_packet_transport() == 0) return 0; 466 return hci_stack->num_cmd_packets > 0; 467 } 468 469 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 470 // check for async hci transport implementations 471 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 472 return hci_stack->hci_transport->can_send_packet_now(packet_type); 473 } 474 475 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 476 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 477 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 478 } 479 480 int hci_can_send_acl_le_packet_now(void){ 481 if (hci_stack->hci_packet_buffer_reserved) return 0; 482 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 483 } 484 485 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 486 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 487 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 488 } 489 490 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 491 if (hci_stack->hci_packet_buffer_reserved) return 0; 492 return hci_can_send_prepared_acl_packet_now(con_handle); 493 } 494 495 #ifdef ENABLE_CLASSIC 496 int hci_can_send_acl_classic_packet_now(void){ 497 if (hci_stack->hci_packet_buffer_reserved) return 0; 498 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 499 } 500 501 int hci_can_send_prepared_sco_packet_now(void){ 502 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 503 if (!hci_stack->synchronous_flow_control_enabled) return 1; 504 return hci_number_free_sco_slots() > 0; 505 } 506 507 int hci_can_send_sco_packet_now(void){ 508 if (hci_stack->hci_packet_buffer_reserved) return 0; 509 return hci_can_send_prepared_sco_packet_now(); 510 } 511 512 void hci_request_sco_can_send_now_event(void){ 513 hci_stack->sco_waiting_for_can_send_now = 1; 514 hci_notify_if_sco_can_send_now(); 515 } 516 #endif 517 518 // used for internal checks in l2cap.c 519 int hci_is_packet_buffer_reserved(void){ 520 return hci_stack->hci_packet_buffer_reserved; 521 } 522 523 // reserves outgoing packet buffer. @returns 1 if successful 524 int hci_reserve_packet_buffer(void){ 525 if (hci_stack->hci_packet_buffer_reserved) { 526 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 527 return 0; 528 } 529 hci_stack->hci_packet_buffer_reserved = 1; 530 return 1; 531 } 532 533 void hci_release_packet_buffer(void){ 534 hci_stack->hci_packet_buffer_reserved = 0; 535 } 536 537 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 538 static int hci_transport_synchronous(void){ 539 return hci_stack->hci_transport->can_send_packet_now == NULL; 540 } 541 542 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 543 544 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 545 546 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 547 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 548 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 549 max_acl_data_packet_length = hci_stack->le_data_packets_length; 550 } 551 552 // testing: reduce buffer to minimum 553 // max_acl_data_packet_length = 52; 554 555 log_debug("hci_send_acl_packet_fragments entered"); 556 557 int err; 558 // multiple packets could be send on a synchronous HCI transport 559 while (1){ 560 561 log_debug("hci_send_acl_packet_fragments loop entered"); 562 563 // get current data 564 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 565 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 566 int more_fragments = 0; 567 568 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 569 if (current_acl_data_packet_length > max_acl_data_packet_length){ 570 more_fragments = 1; 571 current_acl_data_packet_length = max_acl_data_packet_length; 572 } 573 574 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 575 if (acl_header_pos > 0){ 576 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 577 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 578 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 579 } 580 581 // update header len 582 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 583 584 // count packet 585 connection->num_acl_packets_sent++; 586 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 587 588 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 589 if (more_fragments){ 590 // update start of next fragment to send 591 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 592 } else { 593 // done 594 hci_stack->acl_fragmentation_pos = 0; 595 hci_stack->acl_fragmentation_total_size = 0; 596 } 597 598 // send packet 599 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 600 const int size = current_acl_data_packet_length + 4; 601 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 602 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 603 604 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 605 606 // done yet? 607 if (!more_fragments) break; 608 609 // can send more? 610 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 611 } 612 613 log_debug("hci_send_acl_packet_fragments loop over"); 614 615 // release buffer now for synchronous transport 616 if (hci_transport_synchronous()){ 617 hci_release_packet_buffer(); 618 // notify upper stack that it might be possible to send again 619 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 620 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 621 } 622 623 return err; 624 } 625 626 // pre: caller has reserved the packet buffer 627 int hci_send_acl_packet_buffer(int size){ 628 629 // log_info("hci_send_acl_packet_buffer size %u", size); 630 631 if (!hci_stack->hci_packet_buffer_reserved) { 632 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 633 return 0; 634 } 635 636 uint8_t * packet = hci_stack->hci_packet_buffer; 637 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 638 639 // check for free places on Bluetooth module 640 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 641 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 642 hci_release_packet_buffer(); 643 return BTSTACK_ACL_BUFFERS_FULL; 644 } 645 646 hci_connection_t *connection = hci_connection_for_handle( con_handle); 647 if (!connection) { 648 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 649 hci_release_packet_buffer(); 650 return 0; 651 } 652 653 #ifdef ENABLE_CLASSIC 654 hci_connection_timestamp(connection); 655 #endif 656 657 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 658 659 // setup data 660 hci_stack->acl_fragmentation_total_size = size; 661 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 662 663 return hci_send_acl_packet_fragments(connection); 664 } 665 666 #ifdef ENABLE_CLASSIC 667 // pre: caller has reserved the packet buffer 668 int hci_send_sco_packet_buffer(int size){ 669 670 // log_info("hci_send_acl_packet_buffer size %u", size); 671 672 if (!hci_stack->hci_packet_buffer_reserved) { 673 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 674 return 0; 675 } 676 677 uint8_t * packet = hci_stack->hci_packet_buffer; 678 679 // skip checks in loopback mode 680 if (!hci_stack->loopback_mode){ 681 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 682 683 // check for free places on Bluetooth module 684 if (!hci_can_send_prepared_sco_packet_now()) { 685 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 686 hci_release_packet_buffer(); 687 return BTSTACK_ACL_BUFFERS_FULL; 688 } 689 690 // track send packet in connection struct 691 hci_connection_t *connection = hci_connection_for_handle( con_handle); 692 if (!connection) { 693 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 694 hci_release_packet_buffer(); 695 return 0; 696 } 697 connection->num_sco_packets_sent++; 698 } 699 700 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 701 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 702 703 if (hci_transport_synchronous()){ 704 hci_release_packet_buffer(); 705 // notify upper stack that it might be possible to send again 706 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 707 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 708 } 709 710 return err; 711 } 712 #endif 713 714 static void acl_handler(uint8_t *packet, int size){ 715 716 // log_info("acl_handler: size %u", size); 717 718 // get info 719 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 720 hci_connection_t *conn = hci_connection_for_handle(con_handle); 721 uint8_t acl_flags = READ_ACL_FLAGS(packet); 722 uint16_t acl_length = READ_ACL_LENGTH(packet); 723 724 // ignore non-registered handle 725 if (!conn){ 726 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 727 return; 728 } 729 730 // assert packet is complete 731 if (acl_length + 4 != size){ 732 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 733 return; 734 } 735 736 #ifdef ENABLE_CLASSIC 737 // update idle timestamp 738 hci_connection_timestamp(conn); 739 #endif 740 741 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 742 hci_stack->host_completed_packets = 1; 743 conn->num_packets_completed++; 744 #endif 745 746 // handle different packet types 747 switch (acl_flags & 0x03) { 748 749 case 0x01: // continuation fragment 750 751 // sanity checks 752 if (conn->acl_recombination_pos == 0) { 753 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 754 return; 755 } 756 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 757 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 758 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 759 conn->acl_recombination_pos = 0; 760 return; 761 } 762 763 // append fragment payload (header already stored) 764 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 765 conn->acl_recombination_pos += acl_length; 766 767 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 768 // conn->acl_recombination_pos, conn->acl_recombination_length); 769 770 // forward complete L2CAP packet if complete. 771 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 772 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 773 // reset recombination buffer 774 conn->acl_recombination_length = 0; 775 conn->acl_recombination_pos = 0; 776 } 777 break; 778 779 case 0x02: { // first fragment 780 781 // sanity check 782 if (conn->acl_recombination_pos) { 783 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 784 conn->acl_recombination_pos = 0; 785 } 786 787 // peek into L2CAP packet! 788 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 789 790 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 791 792 // compare fragment size to L2CAP packet size 793 if (acl_length >= l2cap_length + 4){ 794 // forward fragment as L2CAP packet 795 hci_emit_acl_packet(packet, acl_length + 4); 796 } else { 797 798 if (acl_length > HCI_ACL_BUFFER_SIZE){ 799 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 800 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 801 return; 802 } 803 804 // store first fragment and tweak acl length for complete package 805 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 806 conn->acl_recombination_pos = acl_length + 4; 807 conn->acl_recombination_length = l2cap_length; 808 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 809 } 810 break; 811 812 } 813 default: 814 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 815 return; 816 } 817 818 // execute main loop 819 hci_run(); 820 } 821 822 static void hci_shutdown_connection(hci_connection_t *conn){ 823 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 824 825 #ifdef ENABLE_CLASSIC 826 #ifdef ENABLE_SCO_OVER_HCI 827 int addr_type = conn->address_type; 828 #endif 829 #endif 830 831 btstack_run_loop_remove_timer(&conn->timeout); 832 833 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 834 btstack_memory_hci_connection_free( conn ); 835 836 // now it's gone 837 hci_emit_nr_connections_changed(); 838 839 #ifdef ENABLE_CLASSIC 840 #ifdef ENABLE_SCO_OVER_HCI 841 // update SCO 842 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 843 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 844 } 845 #endif 846 #endif 847 } 848 849 #ifdef ENABLE_CLASSIC 850 851 static const uint16_t packet_type_sizes[] = { 852 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 853 HCI_ACL_DH1_SIZE, 0, 0, 0, 854 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 855 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 856 }; 857 static const uint8_t packet_type_feature_requirement_bit[] = { 858 0, // 3 slot packets 859 1, // 5 slot packets 860 25, // EDR 2 mpbs 861 26, // EDR 3 mbps 862 39, // 3 slot EDR packts 863 40, // 5 slot EDR packet 864 }; 865 static const uint16_t packet_type_feature_packet_mask[] = { 866 0x0f00, // 3 slot packets 867 0xf000, // 5 slot packets 868 0x1102, // EDR 2 mpbs 869 0x2204, // EDR 3 mbps 870 0x0300, // 3 slot EDR packts 871 0x3000, // 5 slot EDR packet 872 }; 873 874 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 875 // enable packet types based on size 876 uint16_t packet_types = 0; 877 unsigned int i; 878 for (i=0;i<16;i++){ 879 if (packet_type_sizes[i] == 0) continue; 880 if (packet_type_sizes[i] <= buffer_size){ 881 packet_types |= 1 << i; 882 } 883 } 884 // disable packet types due to missing local supported features 885 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 886 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 887 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 888 if (feature_set) continue; 889 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 890 packet_types &= ~packet_type_feature_packet_mask[i]; 891 } 892 // flip bits for "may not be used" 893 packet_types ^= 0x3306; 894 return packet_types; 895 } 896 897 uint16_t hci_usable_acl_packet_types(void){ 898 return hci_stack->packet_types; 899 } 900 #endif 901 902 uint8_t* hci_get_outgoing_packet_buffer(void){ 903 // hci packet buffer is >= acl data packet length 904 return hci_stack->hci_packet_buffer; 905 } 906 907 uint16_t hci_max_acl_data_packet_length(void){ 908 return hci_stack->acl_data_packet_length; 909 } 910 911 #ifdef ENABLE_CLASSIC 912 int hci_extended_sco_link_supported(void){ 913 // No. 31, byte 3, bit 7 914 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 915 } 916 #endif 917 918 int hci_non_flushable_packet_boundary_flag_supported(void){ 919 // No. 54, byte 6, bit 6 920 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 921 } 922 923 static int gap_ssp_supported(void){ 924 // No. 51, byte 6, bit 3 925 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 926 } 927 928 static int hci_classic_supported(void){ 929 #ifdef ENABLE_CLASSIC 930 // No. 37, byte 4, bit 5, = No BR/EDR Support 931 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 932 #else 933 return 0; 934 #endif 935 } 936 937 static int hci_le_supported(void){ 938 #ifdef ENABLE_BLE 939 // No. 37, byte 4, bit 6 = LE Supported (Controller) 940 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 941 #else 942 return 0; 943 #endif 944 } 945 946 #ifdef ENABLE_BLE 947 948 /** 949 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 950 */ 951 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 952 *addr_type = hci_stack->le_own_addr_type; 953 if (hci_stack->le_own_addr_type){ 954 memcpy(addr, hci_stack->le_random_address, 6); 955 } else { 956 memcpy(addr, hci_stack->local_bd_addr, 6); 957 } 958 } 959 960 #ifdef ENABLE_LE_CENTRAL 961 void le_handle_advertisement_report(uint8_t *packet, int size){ 962 963 UNUSED(size); 964 965 int offset = 3; 966 int num_reports = packet[offset]; 967 offset += 1; 968 969 int i; 970 // log_info("HCI: handle adv report with num reports: %d", num_reports); 971 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 972 for (i=0; i<num_reports;i++){ 973 uint8_t data_length = packet[offset + 8]; 974 uint8_t event_size = 10 + data_length; 975 int pos = 0; 976 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 977 event[pos++] = event_size; 978 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 979 offset += 8; 980 pos += 8; 981 event[pos++] = packet[offset + 1 + data_length]; // rssi 982 event[pos++] = packet[offset++]; //data_length; 983 memcpy(&event[pos], &packet[offset], data_length); 984 pos += data_length; 985 offset += data_length + 1; // rssi 986 hci_emit_event(event, pos, 1); 987 } 988 } 989 #endif 990 #endif 991 992 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 993 994 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 995 if (!hci_stack->config) return 0; 996 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 997 // Limit baud rate for Broadcom chipsets to 3 mbps 998 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 999 baud_rate = 3000000; 1000 } 1001 return baud_rate; 1002 } 1003 1004 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1005 UNUSED(ds); 1006 1007 switch (hci_stack->substate){ 1008 case HCI_INIT_W4_SEND_RESET: 1009 log_info("Resend HCI Reset"); 1010 hci_stack->substate = HCI_INIT_SEND_RESET; 1011 hci_stack->num_cmd_packets = 1; 1012 hci_run(); 1013 break; 1014 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1015 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1016 if (hci_stack->hci_transport->reset_link){ 1017 hci_stack->hci_transport->reset_link(); 1018 } 1019 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1020 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1021 log_info("Resend HCI Reset - CSR Warm Boot"); 1022 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1023 hci_stack->num_cmd_packets = 1; 1024 hci_run(); 1025 break; 1026 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1027 if (hci_stack->hci_transport->set_baudrate){ 1028 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1029 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1030 hci_stack->hci_transport->set_baudrate(baud_rate); 1031 } 1032 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1033 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1034 if (hci_stack->hci_transport->reset_link){ 1035 log_info("Link Reset"); 1036 hci_stack->hci_transport->reset_link(); 1037 } 1038 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1039 hci_run(); 1040 } 1041 break; 1042 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1043 // otherwise continue 1044 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1045 hci_send_cmd(&hci_read_local_supported_commands); 1046 break; 1047 default: 1048 break; 1049 } 1050 } 1051 #endif 1052 1053 static void hci_initializing_next_state(void){ 1054 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1055 } 1056 1057 // assumption: hci_can_send_command_packet_now() == true 1058 static void hci_initializing_run(void){ 1059 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1060 switch (hci_stack->substate){ 1061 case HCI_INIT_SEND_RESET: 1062 hci_state_reset(); 1063 1064 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1065 // prepare reset if command complete not received in 100ms 1066 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1067 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1068 btstack_run_loop_add_timer(&hci_stack->timeout); 1069 #endif 1070 // send command 1071 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1072 hci_send_cmd(&hci_reset); 1073 break; 1074 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1075 hci_send_cmd(&hci_read_local_version_information); 1076 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1077 break; 1078 case HCI_INIT_SEND_READ_LOCAL_NAME: 1079 hci_send_cmd(&hci_read_local_name); 1080 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1081 break; 1082 1083 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1084 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1085 hci_state_reset(); 1086 // prepare reset if command complete not received in 100ms 1087 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1088 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1089 btstack_run_loop_add_timer(&hci_stack->timeout); 1090 // send command 1091 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1092 hci_send_cmd(&hci_reset); 1093 break; 1094 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1095 hci_state_reset(); 1096 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1097 hci_send_cmd(&hci_reset); 1098 break; 1099 case HCI_INIT_SEND_BAUD_CHANGE: { 1100 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1101 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1102 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1103 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1104 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1105 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1106 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1107 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1108 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1109 btstack_run_loop_add_timer(&hci_stack->timeout); 1110 } 1111 break; 1112 } 1113 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1114 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1115 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1116 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1117 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1118 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1119 break; 1120 } 1121 case HCI_INIT_CUSTOM_INIT: 1122 // Custom initialization 1123 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1124 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1125 if (valid_cmd){ 1126 int size = 3 + hci_stack->hci_packet_buffer[2]; 1127 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1128 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1129 switch (valid_cmd) { 1130 case 1: 1131 default: 1132 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1133 break; 1134 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1135 log_info("CSR Warm Boot"); 1136 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1137 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1138 btstack_run_loop_add_timer(&hci_stack->timeout); 1139 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1140 && hci_stack->config 1141 && hci_stack->chipset 1142 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1143 && hci_stack->hci_transport->set_baudrate 1144 && hci_transport_uart_get_main_baud_rate()){ 1145 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1146 } else { 1147 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1148 } 1149 break; 1150 } 1151 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1152 break; 1153 } 1154 log_info("Init script done"); 1155 1156 // Init script download on Broadcom chipsets causes: 1157 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1158 // - baud rate to reset, restore UART baud rate if needed 1159 int need_baud_change = hci_stack->config 1160 && hci_stack->chipset 1161 && hci_stack->chipset->set_baudrate_command 1162 && hci_stack->hci_transport->set_baudrate 1163 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1164 if (need_baud_change) { 1165 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1166 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1167 hci_stack->hci_transport->set_baudrate(baud_rate); 1168 } 1169 1170 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1171 // -> Work around: wait a few milliseconds here. 1172 log_info("BCM delay after init script"); 1173 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1174 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1175 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1176 btstack_run_loop_add_timer(&hci_stack->timeout); 1177 break; 1178 } 1179 } 1180 // otherwise continue 1181 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1182 hci_send_cmd(&hci_read_local_supported_commands); 1183 break; 1184 case HCI_INIT_SET_BD_ADDR: 1185 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1186 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1187 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1188 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1189 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1190 break; 1191 #endif 1192 1193 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1194 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1195 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1196 hci_send_cmd(&hci_read_local_supported_commands); 1197 break; 1198 case HCI_INIT_READ_BD_ADDR: 1199 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1200 hci_send_cmd(&hci_read_bd_addr); 1201 break; 1202 case HCI_INIT_READ_BUFFER_SIZE: 1203 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1204 hci_send_cmd(&hci_read_buffer_size); 1205 break; 1206 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1207 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1208 hci_send_cmd(&hci_read_local_supported_features); 1209 break; 1210 1211 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1212 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1213 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1214 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1215 break; 1216 case HCI_INIT_HOST_BUFFER_SIZE: 1217 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1218 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1219 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1220 break; 1221 #endif 1222 1223 case HCI_INIT_SET_EVENT_MASK: 1224 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1225 if (hci_le_supported()){ 1226 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1227 } else { 1228 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1229 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1230 } 1231 break; 1232 1233 #ifdef ENABLE_CLASSIC 1234 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1235 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1236 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1237 break; 1238 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1239 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1240 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1241 break; 1242 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1243 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1244 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1245 break; 1246 case HCI_INIT_WRITE_LOCAL_NAME: 1247 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1248 if (hci_stack->local_name){ 1249 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1250 } else { 1251 char local_name[8+17+1]; 1252 // BTstack 11:22:33:44:55:66 1253 memcpy(local_name, "BTstack ", 8); 1254 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1255 local_name[8+17] = '\0'; 1256 log_info("---> Name %s", local_name); 1257 hci_send_cmd(&hci_write_local_name, local_name); 1258 } 1259 break; 1260 case HCI_INIT_WRITE_EIR_DATA: 1261 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1262 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1263 break; 1264 case HCI_INIT_WRITE_INQUIRY_MODE: 1265 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1266 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1267 break; 1268 case HCI_INIT_WRITE_SCAN_ENABLE: 1269 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1270 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1271 break; 1272 // only sent if ENABLE_SCO_OVER_HCI is defined 1273 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1274 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1275 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1276 break; 1277 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1278 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1279 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1280 break; 1281 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1282 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1283 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1284 log_info("BCM: Route SCO data via HCI transport"); 1285 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1286 break; 1287 1288 #endif 1289 #ifdef ENABLE_BLE 1290 // LE INIT 1291 case HCI_INIT_LE_READ_BUFFER_SIZE: 1292 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1293 hci_send_cmd(&hci_le_read_buffer_size); 1294 break; 1295 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1296 // LE Supported Host = 1, Simultaneous Host = 0 1297 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1298 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1299 break; 1300 #ifdef ENABLE_LE_CENTRAL 1301 case HCI_INIT_READ_WHITE_LIST_SIZE: 1302 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1303 hci_send_cmd(&hci_le_read_white_list_size); 1304 break; 1305 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1306 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1307 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1308 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1309 break; 1310 #endif 1311 #endif 1312 default: 1313 return; 1314 } 1315 } 1316 1317 static void hci_init_done(void){ 1318 // done. tell the app 1319 log_info("hci_init_done -> HCI_STATE_WORKING"); 1320 hci_stack->state = HCI_STATE_WORKING; 1321 hci_emit_state(); 1322 hci_run(); 1323 } 1324 1325 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1326 UNUSED(size); 1327 1328 uint8_t command_completed = 0; 1329 1330 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1331 uint16_t opcode = little_endian_read_16(packet,3); 1332 if (opcode == hci_stack->last_cmd_opcode){ 1333 command_completed = 1; 1334 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1335 } else { 1336 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1337 } 1338 } 1339 1340 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1341 uint8_t status = packet[2]; 1342 uint16_t opcode = little_endian_read_16(packet,4); 1343 if (opcode == hci_stack->last_cmd_opcode){ 1344 if (status){ 1345 command_completed = 1; 1346 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1347 } else { 1348 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1349 } 1350 } else { 1351 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1352 } 1353 } 1354 1355 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1356 1357 // Vendor == CSR 1358 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1359 // TODO: track actual command 1360 command_completed = 1; 1361 } 1362 1363 // Vendor == Toshiba 1364 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1365 // TODO: track actual command 1366 command_completed = 1; 1367 } 1368 1369 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1370 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1371 // 1372 // HCI Reset 1373 // Timeout 100 ms 1374 // HCI Reset 1375 // Command Complete Reset 1376 // HCI Read Local Version Information 1377 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1378 // hang... 1379 // 1380 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1381 if (!command_completed 1382 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1383 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1384 1385 uint16_t opcode = little_endian_read_16(packet,3); 1386 if (opcode == hci_reset.opcode){ 1387 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1388 return; 1389 } 1390 } 1391 1392 // CSR & H5 1393 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1394 if (!command_completed 1395 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1396 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1397 1398 uint16_t opcode = little_endian_read_16(packet,3); 1399 if (opcode == hci_reset.opcode){ 1400 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1401 return; 1402 } 1403 } 1404 1405 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1406 // fix: Correct substate and behave as command below 1407 if (command_completed){ 1408 switch (hci_stack->substate){ 1409 case HCI_INIT_SEND_RESET: 1410 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1411 break; 1412 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1413 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1414 break; 1415 default: 1416 break; 1417 } 1418 } 1419 1420 #endif 1421 1422 if (!command_completed) return; 1423 1424 int need_baud_change = 0; 1425 int need_addr_change = 0; 1426 1427 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1428 need_baud_change = hci_stack->config 1429 && hci_stack->chipset 1430 && hci_stack->chipset->set_baudrate_command 1431 && hci_stack->hci_transport->set_baudrate 1432 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1433 1434 need_addr_change = hci_stack->custom_bd_addr_set 1435 && hci_stack->chipset 1436 && hci_stack->chipset->set_bd_addr_command; 1437 #endif 1438 1439 switch(hci_stack->substate){ 1440 1441 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1442 case HCI_INIT_SEND_RESET: 1443 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1444 // fix: just correct substate and behave as command below 1445 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1446 btstack_run_loop_remove_timer(&hci_stack->timeout); 1447 break; 1448 case HCI_INIT_W4_SEND_RESET: 1449 btstack_run_loop_remove_timer(&hci_stack->timeout); 1450 break; 1451 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1452 log_info("Received local name, need baud change %d", need_baud_change); 1453 if (need_baud_change){ 1454 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1455 return; 1456 } 1457 // skip baud change 1458 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1459 return; 1460 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1461 // for STLC2500D, baud rate change already happened. 1462 // for others, baud rate gets changed now 1463 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1464 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1465 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1466 hci_stack->hci_transport->set_baudrate(baud_rate); 1467 } 1468 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1469 return; 1470 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1471 btstack_run_loop_remove_timer(&hci_stack->timeout); 1472 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1473 return; 1474 case HCI_INIT_W4_CUSTOM_INIT: 1475 // repeat custom init 1476 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1477 return; 1478 #else 1479 case HCI_INIT_W4_SEND_RESET: 1480 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1481 return ; 1482 #endif 1483 1484 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1485 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1486 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1487 return; 1488 } 1489 if (need_addr_change){ 1490 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1491 return; 1492 } 1493 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1494 return; 1495 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1496 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1497 if (need_baud_change){ 1498 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1499 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1500 hci_stack->hci_transport->set_baudrate(baud_rate); 1501 } 1502 if (need_addr_change){ 1503 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1504 return; 1505 } 1506 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1507 return; 1508 case HCI_INIT_W4_SET_BD_ADDR: 1509 // for STLC2500D, bd addr change only gets active after sending reset command 1510 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1511 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1512 return; 1513 } 1514 // skipping st warm boot 1515 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1516 return; 1517 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1518 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1519 return; 1520 #endif 1521 case HCI_INIT_W4_READ_BD_ADDR: 1522 // only read buffer size if supported 1523 if (hci_stack->local_supported_commands[0] & 0x01) { 1524 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1525 return; 1526 } 1527 // skipping read buffer size 1528 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1529 return; 1530 case HCI_INIT_W4_SET_EVENT_MASK: 1531 // skip Classic init commands for LE only chipsets 1532 if (!hci_classic_supported()){ 1533 #ifdef ENABLE_BLE 1534 if (hci_le_supported()){ 1535 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1536 return; 1537 } 1538 #endif 1539 log_error("Neither BR/EDR nor LE supported"); 1540 hci_init_done(); 1541 return; 1542 } 1543 if (!gap_ssp_supported()){ 1544 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1545 return; 1546 } 1547 break; 1548 #ifdef ENABLE_BLE 1549 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1550 // skip write le host if not supported (e.g. on LE only EM9301) 1551 if (hci_stack->local_supported_commands[0] & 0x02) break; 1552 #ifdef ENABLE_LE_CENTRAL 1553 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1554 #else 1555 hci_init_done(); 1556 #endif 1557 return; 1558 #endif 1559 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1560 // skip write eir data if no eir data set 1561 if (hci_stack->eir_data) break; 1562 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1563 return; 1564 1565 #ifdef ENABLE_SCO_OVER_HCI 1566 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1567 // skip write synchronous flow control if not supported 1568 if (hci_stack->local_supported_commands[0] & 0x04) break; 1569 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1570 // explicit fall through to reduce repetitions 1571 1572 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1573 // skip write default erroneous data reporting if not supported 1574 if (hci_stack->local_supported_commands[0] & 0x08) break; 1575 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1576 // explicit fall through to reduce repetitions 1577 1578 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1579 // skip bcm set sco pcm config on non-Broadcom chipsets 1580 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1581 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1582 // explicit fall through to reduce repetitions 1583 1584 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1585 if (!hci_le_supported()){ 1586 // SKIP LE init for Classic only configuration 1587 hci_init_done(); 1588 return; 1589 } 1590 break; 1591 1592 #else /* !ENABLE_SCO_OVER_HCI */ 1593 1594 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1595 #ifdef ENABLE_BLE 1596 if (hci_le_supported()){ 1597 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1598 return; 1599 } 1600 #endif 1601 // SKIP LE init for Classic only configuration 1602 hci_init_done(); 1603 return; 1604 #endif /* ENABLE_SCO_OVER_HCI */ 1605 1606 // Response to command before init done state -> init done 1607 case (HCI_INIT_DONE-1): 1608 hci_init_done(); 1609 return; 1610 1611 default: 1612 break; 1613 } 1614 hci_initializing_next_state(); 1615 } 1616 1617 static void event_handler(uint8_t *packet, int size){ 1618 1619 uint16_t event_length = packet[1]; 1620 1621 // assert packet is complete 1622 if (size != event_length + 2){ 1623 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1624 return; 1625 } 1626 1627 bd_addr_t addr; 1628 bd_addr_type_t addr_type; 1629 hci_con_handle_t handle; 1630 hci_connection_t * conn; 1631 int i; 1632 #ifdef ENABLE_CLASSIC 1633 uint8_t link_type; 1634 #endif 1635 1636 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1637 1638 switch (hci_event_packet_get_type(packet)) { 1639 1640 case HCI_EVENT_COMMAND_COMPLETE: 1641 // get num cmd packets - limit to 1 to reduce complexity 1642 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1643 1644 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1645 if (packet[5]) break; 1646 // terminate, name 248 chars 1647 packet[6+248] = 0; 1648 log_info("local name: %s", &packet[6]); 1649 } 1650 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1651 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1652 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1653 uint16_t acl_len = little_endian_read_16(packet, 6); 1654 uint16_t sco_len = packet[8]; 1655 1656 // determine usable ACL/SCO payload size 1657 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1658 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1659 1660 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1661 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1662 1663 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1664 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1665 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1666 } 1667 } 1668 #ifdef ENABLE_BLE 1669 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1670 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1671 hci_stack->le_acl_packets_total_num = packet[8]; 1672 // determine usable ACL payload size 1673 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1674 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1675 } 1676 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1677 } 1678 #ifdef ENABLE_LE_CENTRAL 1679 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1680 hci_stack->le_whitelist_capacity = packet[6]; 1681 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1682 } 1683 #endif 1684 #endif 1685 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1686 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1687 hci_stack->local_bd_addr); 1688 log_info("Local Address, Status: 0x%02x: Addr: %s", 1689 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1690 #ifdef ENABLE_CLASSIC 1691 if (hci_stack->link_key_db){ 1692 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1693 } 1694 #endif 1695 } 1696 #ifdef ENABLE_CLASSIC 1697 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1698 hci_emit_discoverable_enabled(hci_stack->discoverable); 1699 } 1700 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1701 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1702 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1703 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1704 hci_emit_event(event, sizeof(event), 1); 1705 } 1706 } 1707 #endif 1708 1709 // Note: HCI init checks 1710 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1711 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1712 1713 #ifdef ENABLE_CLASSIC 1714 // determine usable ACL packet types based on host buffer size and supported features 1715 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1716 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1717 #endif 1718 // Classic/LE 1719 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1720 } 1721 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1722 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1723 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1724 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1725 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1726 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1727 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1728 } 1729 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1730 hci_stack->local_supported_commands[0] = 1731 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1732 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1733 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1734 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1735 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1736 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1737 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1738 } 1739 #ifdef ENABLE_CLASSIC 1740 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1741 if (packet[5] == 0){ 1742 hci_stack->synchronous_flow_control_enabled = 1; 1743 } 1744 } 1745 #endif 1746 break; 1747 1748 case HCI_EVENT_COMMAND_STATUS: 1749 // get num cmd packets - limit to 1 to reduce complexity 1750 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1751 break; 1752 1753 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1754 int offset = 3; 1755 for (i=0; i<packet[2];i++){ 1756 handle = little_endian_read_16(packet, offset); 1757 offset += 2; 1758 uint16_t num_packets = little_endian_read_16(packet, offset); 1759 offset += 2; 1760 1761 conn = hci_connection_for_handle(handle); 1762 if (!conn){ 1763 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1764 continue; 1765 } 1766 1767 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1768 #ifdef ENABLE_CLASSIC 1769 if (conn->num_sco_packets_sent >= num_packets){ 1770 conn->num_sco_packets_sent -= num_packets; 1771 } else { 1772 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1773 conn->num_sco_packets_sent = 0; 1774 } 1775 hci_notify_if_sco_can_send_now(); 1776 #endif 1777 } else { 1778 if (conn->num_acl_packets_sent >= num_packets){ 1779 conn->num_acl_packets_sent -= num_packets; 1780 } else { 1781 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1782 conn->num_acl_packets_sent = 0; 1783 } 1784 } 1785 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1786 } 1787 break; 1788 } 1789 1790 #ifdef ENABLE_CLASSIC 1791 case HCI_EVENT_INQUIRY_COMPLETE: 1792 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1793 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1794 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1795 hci_emit_event(event, sizeof(event), 1); 1796 } 1797 break; 1798 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1799 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1800 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1801 } 1802 break; 1803 case HCI_EVENT_CONNECTION_REQUEST: 1804 reverse_bd_addr(&packet[2], addr); 1805 // TODO: eval COD 8-10 1806 link_type = packet[11]; 1807 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1808 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1809 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1810 if (!conn) { 1811 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1812 } 1813 if (!conn) { 1814 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1815 hci_stack->decline_reason = 0x0d; 1816 bd_addr_copy(hci_stack->decline_addr, addr); 1817 break; 1818 } 1819 conn->role = HCI_ROLE_SLAVE; 1820 conn->state = RECEIVED_CONNECTION_REQUEST; 1821 // store info about eSCO 1822 if (link_type == 0x02){ 1823 conn->remote_supported_feature_eSCO = 1; 1824 } 1825 hci_run(); 1826 break; 1827 1828 case HCI_EVENT_CONNECTION_COMPLETE: 1829 // Connection management 1830 reverse_bd_addr(&packet[5], addr); 1831 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1832 addr_type = BD_ADDR_TYPE_CLASSIC; 1833 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1834 if (conn) { 1835 if (!packet[2]){ 1836 conn->state = OPEN; 1837 conn->con_handle = little_endian_read_16(packet, 3); 1838 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1839 1840 // restart timer 1841 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1842 btstack_run_loop_add_timer(&conn->timeout); 1843 1844 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1845 1846 hci_emit_nr_connections_changed(); 1847 } else { 1848 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1849 uint8_t status = packet[2]; 1850 bd_addr_t bd_address; 1851 memcpy(&bd_address, conn->address, 6); 1852 1853 // connection failed, remove entry 1854 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1855 btstack_memory_hci_connection_free( conn ); 1856 1857 // notify client if dedicated bonding 1858 if (notify_dedicated_bonding_failed){ 1859 log_info("hci notify_dedicated_bonding_failed"); 1860 hci_emit_dedicated_bonding_result(bd_address, status); 1861 } 1862 1863 // if authentication error, also delete link key 1864 if (packet[2] == 0x05) { 1865 gap_drop_link_key_for_bd_addr(addr); 1866 } 1867 } 1868 } 1869 break; 1870 1871 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1872 reverse_bd_addr(&packet[5], addr); 1873 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1874 if (packet[2]){ 1875 // connection failed 1876 break; 1877 } 1878 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1879 if (!conn) { 1880 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1881 } 1882 if (!conn) { 1883 break; 1884 } 1885 conn->state = OPEN; 1886 conn->con_handle = little_endian_read_16(packet, 3); 1887 1888 #ifdef ENABLE_SCO_OVER_HCI 1889 // update SCO 1890 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1891 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1892 } 1893 #endif 1894 break; 1895 1896 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1897 handle = little_endian_read_16(packet, 3); 1898 conn = hci_connection_for_handle(handle); 1899 if (!conn) break; 1900 if (!packet[2]){ 1901 uint8_t * features = &packet[5]; 1902 if (features[6] & (1 << 3)){ 1903 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1904 } 1905 if (features[3] & (1<<7)){ 1906 conn->remote_supported_feature_eSCO = 1; 1907 } 1908 } 1909 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1910 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1911 if (conn->bonding_flags & BONDING_DEDICATED){ 1912 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1913 } 1914 break; 1915 1916 case HCI_EVENT_LINK_KEY_REQUEST: 1917 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1918 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1919 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1920 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1921 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1922 hci_run(); 1923 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1924 return; 1925 1926 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1927 reverse_bd_addr(&packet[2], addr); 1928 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1929 if (!conn) break; 1930 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1931 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1932 // Change Connection Encryption keeps link key type 1933 if (link_key_type != CHANGED_COMBINATION_KEY){ 1934 conn->link_key_type = link_key_type; 1935 } 1936 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1937 // still forward event to allow dismiss of pairing dialog 1938 break; 1939 } 1940 1941 case HCI_EVENT_PIN_CODE_REQUEST: 1942 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1943 // non-bondable mode: pin code negative reply will be sent 1944 if (!hci_stack->bondable){ 1945 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1946 hci_run(); 1947 return; 1948 } 1949 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1950 if (!hci_stack->link_key_db) break; 1951 hci_event_pin_code_request_get_bd_addr(packet, addr); 1952 hci_stack->link_key_db->delete_link_key(addr); 1953 break; 1954 1955 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1956 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1957 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1958 break; 1959 1960 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1961 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1962 if (!hci_stack->ssp_auto_accept) break; 1963 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1964 break; 1965 1966 case HCI_EVENT_USER_PASSKEY_REQUEST: 1967 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1968 if (!hci_stack->ssp_auto_accept) break; 1969 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1970 break; 1971 #endif 1972 1973 case HCI_EVENT_ENCRYPTION_CHANGE: 1974 handle = little_endian_read_16(packet, 3); 1975 conn = hci_connection_for_handle(handle); 1976 if (!conn) break; 1977 if (packet[2] == 0) { 1978 if (packet[5]){ 1979 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1980 } else { 1981 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1982 } 1983 } 1984 #ifdef ENABLE_CLASSIC 1985 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1986 #endif 1987 break; 1988 1989 #ifdef ENABLE_CLASSIC 1990 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1991 handle = little_endian_read_16(packet, 3); 1992 conn = hci_connection_for_handle(handle); 1993 if (!conn) break; 1994 1995 // dedicated bonding: send result and disconnect 1996 if (conn->bonding_flags & BONDING_DEDICATED){ 1997 conn->bonding_flags &= ~BONDING_DEDICATED; 1998 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1999 conn->bonding_status = packet[2]; 2000 break; 2001 } 2002 2003 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2004 // link key sufficient for requested security 2005 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2006 break; 2007 } 2008 // not enough 2009 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2010 break; 2011 #endif 2012 2013 // HCI_EVENT_DISCONNECTION_COMPLETE 2014 // has been split, to first notify stack before shutting connection down 2015 // see end of function, too. 2016 case HCI_EVENT_DISCONNECTION_COMPLETE: 2017 if (packet[2]) break; // status != 0 2018 handle = little_endian_read_16(packet, 3); 2019 // drop outgoing ACL fragments if it is for closed connection 2020 if (hci_stack->acl_fragmentation_total_size > 0) { 2021 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2022 log_info("hci: drop fragmented ACL data for closed connection"); 2023 hci_stack->acl_fragmentation_total_size = 0; 2024 hci_stack->acl_fragmentation_pos = 0; 2025 } 2026 } 2027 2028 // re-enable advertisements for le connections if active 2029 conn = hci_connection_for_handle(handle); 2030 if (!conn) break; 2031 #ifdef ENABLE_BLE 2032 #ifdef ENABLE_LE_PERIPHERAL 2033 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2034 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2035 } 2036 #endif 2037 #endif 2038 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2039 break; 2040 2041 case HCI_EVENT_HARDWARE_ERROR: 2042 log_error("Hardware Error: 0x%02x", packet[2]); 2043 if (hci_stack->hardware_error_callback){ 2044 (*hci_stack->hardware_error_callback)(packet[2]); 2045 } else { 2046 // if no special requests, just reboot stack 2047 hci_power_control_off(); 2048 hci_power_control_on(); 2049 } 2050 break; 2051 2052 #ifdef ENABLE_CLASSIC 2053 case HCI_EVENT_ROLE_CHANGE: 2054 if (packet[2]) break; // status != 0 2055 handle = little_endian_read_16(packet, 3); 2056 conn = hci_connection_for_handle(handle); 2057 if (!conn) break; // no conn 2058 conn->role = packet[9]; 2059 break; 2060 #endif 2061 2062 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2063 // release packet buffer only for asynchronous transport and if there are not further fragements 2064 if (hci_transport_synchronous()) { 2065 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2066 return; // instead of break: to avoid re-entering hci_run() 2067 } 2068 if (hci_stack->acl_fragmentation_total_size) break; 2069 hci_release_packet_buffer(); 2070 2071 // L2CAP receives this event via the hci_emit_event below 2072 2073 #ifdef ENABLE_CLASSIC 2074 // For SCO, we do the can_send_now_check here 2075 hci_notify_if_sco_can_send_now(); 2076 #endif 2077 break; 2078 2079 #ifdef ENABLE_CLASSIC 2080 case HCI_EVENT_SCO_CAN_SEND_NOW: 2081 // For SCO, we do the can_send_now_check here 2082 hci_notify_if_sco_can_send_now(); 2083 return; 2084 2085 // explode inquriy results for easier consumption 2086 case HCI_EVENT_INQUIRY_RESULT: 2087 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2088 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2089 gap_inquiry_explode(packet); 2090 break; 2091 #endif 2092 2093 #ifdef ENABLE_BLE 2094 case HCI_EVENT_LE_META: 2095 switch (packet[2]){ 2096 #ifdef ENABLE_LE_CENTRAL 2097 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2098 // log_info("advertising report received"); 2099 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2100 le_handle_advertisement_report(packet, size); 2101 break; 2102 #endif 2103 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2104 // Connection management 2105 reverse_bd_addr(&packet[8], addr); 2106 addr_type = (bd_addr_type_t)packet[7]; 2107 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2108 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2109 #ifdef ENABLE_LE_CENTRAL 2110 // if auto-connect, remove from whitelist in both roles 2111 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2112 hci_remove_from_whitelist(addr_type, addr); 2113 } 2114 // handle error: error is reported only to the initiator -> outgoing connection 2115 if (packet[3]){ 2116 // outgoing connection establishment is done 2117 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2118 // remove entry 2119 if (conn){ 2120 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2121 btstack_memory_hci_connection_free( conn ); 2122 } 2123 break; 2124 } 2125 #endif 2126 // on success, both hosts receive connection complete event 2127 if (packet[6] == HCI_ROLE_MASTER){ 2128 #ifdef ENABLE_LE_CENTRAL 2129 // if we're master, it was an outgoing connection and we're done with it 2130 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2131 #endif 2132 } else { 2133 #ifdef ENABLE_LE_PERIPHERAL 2134 // if we're slave, it was an incoming connection, advertisements have stopped 2135 hci_stack->le_advertisements_active = 0; 2136 // try to re-enable them 2137 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2138 #endif 2139 } 2140 // LE connections are auto-accepted, so just create a connection if there isn't one already 2141 if (!conn){ 2142 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2143 } 2144 // no memory, sorry. 2145 if (!conn){ 2146 break; 2147 } 2148 2149 conn->state = OPEN; 2150 conn->role = packet[6]; 2151 conn->con_handle = little_endian_read_16(packet, 4); 2152 2153 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2154 2155 // restart timer 2156 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2157 // btstack_run_loop_add_timer(&conn->timeout); 2158 2159 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2160 2161 hci_emit_nr_connections_changed(); 2162 break; 2163 2164 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2165 2166 default: 2167 break; 2168 } 2169 break; 2170 #endif 2171 default: 2172 break; 2173 } 2174 2175 // handle BT initialization 2176 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2177 hci_initializing_event_handler(packet, size); 2178 } 2179 2180 // help with BT sleep 2181 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2182 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2183 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2184 hci_initializing_next_state(); 2185 } 2186 2187 // notify upper stack 2188 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2189 2190 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2191 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2192 if (!packet[2]){ 2193 handle = little_endian_read_16(packet, 3); 2194 hci_connection_t * aConn = hci_connection_for_handle(handle); 2195 if (aConn) { 2196 uint8_t status = aConn->bonding_status; 2197 uint16_t flags = aConn->bonding_flags; 2198 bd_addr_t bd_address; 2199 memcpy(&bd_address, aConn->address, 6); 2200 hci_shutdown_connection(aConn); 2201 // connection struct is gone, don't access anymore 2202 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2203 hci_emit_dedicated_bonding_result(bd_address, status); 2204 } 2205 } 2206 } 2207 } 2208 2209 // execute main loop 2210 hci_run(); 2211 } 2212 2213 #ifdef ENABLE_CLASSIC 2214 static void sco_handler(uint8_t * packet, uint16_t size){ 2215 if (!hci_stack->sco_packet_handler) return; 2216 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2217 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2218 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2219 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2220 if (conn){ 2221 conn->num_packets_completed++; 2222 hci_stack->host_completed_packets = 1; 2223 hci_run(); 2224 } 2225 #endif 2226 } 2227 #endif 2228 2229 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2230 hci_dump_packet(packet_type, 1, packet, size); 2231 switch (packet_type) { 2232 case HCI_EVENT_PACKET: 2233 event_handler(packet, size); 2234 break; 2235 case HCI_ACL_DATA_PACKET: 2236 acl_handler(packet, size); 2237 break; 2238 #ifdef ENABLE_CLASSIC 2239 case HCI_SCO_DATA_PACKET: 2240 sco_handler(packet, size); 2241 break; 2242 #endif 2243 default: 2244 break; 2245 } 2246 } 2247 2248 /** 2249 * @brief Add event packet handler. 2250 */ 2251 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2252 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2253 } 2254 2255 2256 /** Register HCI packet handlers */ 2257 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2258 hci_stack->acl_packet_handler = handler; 2259 } 2260 2261 #ifdef ENABLE_CLASSIC 2262 /** 2263 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2264 */ 2265 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2266 hci_stack->sco_packet_handler = handler; 2267 } 2268 #endif 2269 2270 static void hci_state_reset(void){ 2271 // no connections yet 2272 hci_stack->connections = NULL; 2273 2274 // keep discoverable/connectable as this has been requested by the client(s) 2275 // hci_stack->discoverable = 0; 2276 // hci_stack->connectable = 0; 2277 // hci_stack->bondable = 1; 2278 // hci_stack->own_addr_type = 0; 2279 2280 // buffer is free 2281 hci_stack->hci_packet_buffer_reserved = 0; 2282 2283 // no pending cmds 2284 hci_stack->decline_reason = 0; 2285 hci_stack->new_scan_enable_value = 0xff; 2286 2287 // LE 2288 #ifdef ENABLE_BLE 2289 memset(hci_stack->le_random_address, 0, 6); 2290 hci_stack->le_random_address_set = 0; 2291 #endif 2292 #ifdef ENABLE_LE_CENTRAL 2293 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2294 hci_stack->le_scan_type = 0xff; 2295 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2296 hci_stack->le_whitelist = 0; 2297 hci_stack->le_whitelist_capacity = 0; 2298 2299 // connection parameter to use for outgoing connections 2300 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2301 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2302 hci_stack->le_connection_latency = 4; // 4 2303 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2304 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2305 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2306 #endif 2307 2308 // connection parameter range used to answer connection parameter update requests in l2cap 2309 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2310 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2311 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2312 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2313 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2314 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2315 } 2316 2317 #ifdef ENABLE_CLASSIC 2318 /** 2319 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2320 */ 2321 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2322 // store and open remote device db 2323 hci_stack->link_key_db = link_key_db; 2324 if (hci_stack->link_key_db) { 2325 hci_stack->link_key_db->open(); 2326 } 2327 } 2328 #endif 2329 2330 void hci_init(const hci_transport_t *transport, const void *config){ 2331 2332 #ifdef HAVE_MALLOC 2333 if (!hci_stack) { 2334 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2335 } 2336 #else 2337 hci_stack = &hci_stack_static; 2338 #endif 2339 memset(hci_stack, 0, sizeof(hci_stack_t)); 2340 2341 // reference to use transport layer implementation 2342 hci_stack->hci_transport = transport; 2343 2344 // reference to used config 2345 hci_stack->config = config; 2346 2347 // setup pointer for outgoing packet buffer 2348 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2349 2350 // max acl payload size defined in config.h 2351 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2352 2353 // register packet handlers with transport 2354 transport->register_packet_handler(&packet_handler); 2355 2356 hci_stack->state = HCI_STATE_OFF; 2357 2358 // class of device 2359 hci_stack->class_of_device = 0x007a020c; // Smartphone 2360 2361 // bondable by default 2362 hci_stack->bondable = 1; 2363 2364 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2365 hci_stack->ssp_enable = 1; 2366 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2367 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2368 hci_stack->ssp_auto_accept = 1; 2369 2370 // voice setting - signed 16 bit pcm data with CVSD over the air 2371 hci_stack->sco_voice_setting = 0x60; 2372 2373 hci_state_reset(); 2374 } 2375 2376 /** 2377 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2378 */ 2379 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2380 hci_stack->chipset = chipset_driver; 2381 2382 // reset chipset driver - init is also called on power_up 2383 if (hci_stack->chipset && hci_stack->chipset->init){ 2384 hci_stack->chipset->init(hci_stack->config); 2385 } 2386 } 2387 2388 /** 2389 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2390 */ 2391 void hci_set_control(const btstack_control_t *hardware_control){ 2392 // references to used control implementation 2393 hci_stack->control = hardware_control; 2394 // init with transport config 2395 hardware_control->init(hci_stack->config); 2396 } 2397 2398 void hci_close(void){ 2399 // close remote device db 2400 if (hci_stack->link_key_db) { 2401 hci_stack->link_key_db->close(); 2402 } 2403 2404 btstack_linked_list_iterator_t lit; 2405 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2406 while (btstack_linked_list_iterator_has_next(&lit)){ 2407 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2408 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2409 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2410 hci_shutdown_connection(connection); 2411 } 2412 2413 hci_power_control(HCI_POWER_OFF); 2414 2415 #ifdef HAVE_MALLOC 2416 free(hci_stack); 2417 #endif 2418 hci_stack = NULL; 2419 } 2420 2421 #ifdef ENABLE_CLASSIC 2422 void gap_set_class_of_device(uint32_t class_of_device){ 2423 hci_stack->class_of_device = class_of_device; 2424 } 2425 2426 void hci_disable_l2cap_timeout_check(void){ 2427 disable_l2cap_timeouts = 1; 2428 } 2429 #endif 2430 2431 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2432 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2433 void hci_set_bd_addr(bd_addr_t addr){ 2434 memcpy(hci_stack->custom_bd_addr, addr, 6); 2435 hci_stack->custom_bd_addr_set = 1; 2436 } 2437 #endif 2438 2439 // State-Module-Driver overview 2440 // state module low-level 2441 // HCI_STATE_OFF off close 2442 // HCI_STATE_INITIALIZING, on open 2443 // HCI_STATE_WORKING, on open 2444 // HCI_STATE_HALTING, on open 2445 // HCI_STATE_SLEEPING, off/sleep close 2446 // HCI_STATE_FALLING_ASLEEP on open 2447 2448 static int hci_power_control_on(void){ 2449 2450 // power on 2451 int err = 0; 2452 if (hci_stack->control && hci_stack->control->on){ 2453 err = (*hci_stack->control->on)(); 2454 } 2455 if (err){ 2456 log_error( "POWER_ON failed"); 2457 hci_emit_hci_open_failed(); 2458 return err; 2459 } 2460 2461 // int chipset driver 2462 if (hci_stack->chipset && hci_stack->chipset->init){ 2463 hci_stack->chipset->init(hci_stack->config); 2464 } 2465 2466 // init transport 2467 if (hci_stack->hci_transport->init){ 2468 hci_stack->hci_transport->init(hci_stack->config); 2469 } 2470 2471 // open transport 2472 err = hci_stack->hci_transport->open(); 2473 if (err){ 2474 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2475 if (hci_stack->control && hci_stack->control->off){ 2476 (*hci_stack->control->off)(); 2477 } 2478 hci_emit_hci_open_failed(); 2479 return err; 2480 } 2481 return 0; 2482 } 2483 2484 static void hci_power_control_off(void){ 2485 2486 log_info("hci_power_control_off"); 2487 2488 // close low-level device 2489 hci_stack->hci_transport->close(); 2490 2491 log_info("hci_power_control_off - hci_transport closed"); 2492 2493 // power off 2494 if (hci_stack->control && hci_stack->control->off){ 2495 (*hci_stack->control->off)(); 2496 } 2497 2498 log_info("hci_power_control_off - control closed"); 2499 2500 hci_stack->state = HCI_STATE_OFF; 2501 } 2502 2503 static void hci_power_control_sleep(void){ 2504 2505 log_info("hci_power_control_sleep"); 2506 2507 #if 0 2508 // don't close serial port during sleep 2509 2510 // close low-level device 2511 hci_stack->hci_transport->close(hci_stack->config); 2512 #endif 2513 2514 // sleep mode 2515 if (hci_stack->control && hci_stack->control->sleep){ 2516 (*hci_stack->control->sleep)(); 2517 } 2518 2519 hci_stack->state = HCI_STATE_SLEEPING; 2520 } 2521 2522 static int hci_power_control_wake(void){ 2523 2524 log_info("hci_power_control_wake"); 2525 2526 // wake on 2527 if (hci_stack->control && hci_stack->control->wake){ 2528 (*hci_stack->control->wake)(); 2529 } 2530 2531 #if 0 2532 // open low-level device 2533 int err = hci_stack->hci_transport->open(hci_stack->config); 2534 if (err){ 2535 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2536 if (hci_stack->control && hci_stack->control->off){ 2537 (*hci_stack->control->off)(); 2538 } 2539 hci_emit_hci_open_failed(); 2540 return err; 2541 } 2542 #endif 2543 2544 return 0; 2545 } 2546 2547 static void hci_power_transition_to_initializing(void){ 2548 // set up state machine 2549 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2550 hci_stack->hci_packet_buffer_reserved = 0; 2551 hci_stack->state = HCI_STATE_INITIALIZING; 2552 hci_stack->substate = HCI_INIT_SEND_RESET; 2553 } 2554 2555 int hci_power_control(HCI_POWER_MODE power_mode){ 2556 2557 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2558 2559 int err = 0; 2560 switch (hci_stack->state){ 2561 2562 case HCI_STATE_OFF: 2563 switch (power_mode){ 2564 case HCI_POWER_ON: 2565 err = hci_power_control_on(); 2566 if (err) { 2567 log_error("hci_power_control_on() error %d", err); 2568 return err; 2569 } 2570 hci_power_transition_to_initializing(); 2571 break; 2572 case HCI_POWER_OFF: 2573 // do nothing 2574 break; 2575 case HCI_POWER_SLEEP: 2576 // do nothing (with SLEEP == OFF) 2577 break; 2578 } 2579 break; 2580 2581 case HCI_STATE_INITIALIZING: 2582 switch (power_mode){ 2583 case HCI_POWER_ON: 2584 // do nothing 2585 break; 2586 case HCI_POWER_OFF: 2587 // no connections yet, just turn it off 2588 hci_power_control_off(); 2589 break; 2590 case HCI_POWER_SLEEP: 2591 // no connections yet, just turn it off 2592 hci_power_control_sleep(); 2593 break; 2594 } 2595 break; 2596 2597 case HCI_STATE_WORKING: 2598 switch (power_mode){ 2599 case HCI_POWER_ON: 2600 // do nothing 2601 break; 2602 case HCI_POWER_OFF: 2603 // see hci_run 2604 hci_stack->state = HCI_STATE_HALTING; 2605 break; 2606 case HCI_POWER_SLEEP: 2607 // see hci_run 2608 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2609 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2610 break; 2611 } 2612 break; 2613 2614 case HCI_STATE_HALTING: 2615 switch (power_mode){ 2616 case HCI_POWER_ON: 2617 hci_power_transition_to_initializing(); 2618 break; 2619 case HCI_POWER_OFF: 2620 // do nothing 2621 break; 2622 case HCI_POWER_SLEEP: 2623 // see hci_run 2624 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2625 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2626 break; 2627 } 2628 break; 2629 2630 case HCI_STATE_FALLING_ASLEEP: 2631 switch (power_mode){ 2632 case HCI_POWER_ON: 2633 2634 #ifdef HAVE_PLATFORM_IPHONE_OS 2635 // nothing to do, if H4 supports power management 2636 if (btstack_control_iphone_power_management_enabled()){ 2637 hci_stack->state = HCI_STATE_INITIALIZING; 2638 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2639 break; 2640 } 2641 #endif 2642 hci_power_transition_to_initializing(); 2643 break; 2644 case HCI_POWER_OFF: 2645 // see hci_run 2646 hci_stack->state = HCI_STATE_HALTING; 2647 break; 2648 case HCI_POWER_SLEEP: 2649 // do nothing 2650 break; 2651 } 2652 break; 2653 2654 case HCI_STATE_SLEEPING: 2655 switch (power_mode){ 2656 case HCI_POWER_ON: 2657 2658 #ifdef HAVE_PLATFORM_IPHONE_OS 2659 // nothing to do, if H4 supports power management 2660 if (btstack_control_iphone_power_management_enabled()){ 2661 hci_stack->state = HCI_STATE_INITIALIZING; 2662 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2663 hci_update_scan_enable(); 2664 break; 2665 } 2666 #endif 2667 err = hci_power_control_wake(); 2668 if (err) return err; 2669 hci_power_transition_to_initializing(); 2670 break; 2671 case HCI_POWER_OFF: 2672 hci_stack->state = HCI_STATE_HALTING; 2673 break; 2674 case HCI_POWER_SLEEP: 2675 // do nothing 2676 break; 2677 } 2678 break; 2679 } 2680 2681 // create internal event 2682 hci_emit_state(); 2683 2684 // trigger next/first action 2685 hci_run(); 2686 2687 return 0; 2688 } 2689 2690 2691 #ifdef ENABLE_CLASSIC 2692 2693 static void hci_update_scan_enable(void){ 2694 // 2 = page scan, 1 = inq scan 2695 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2696 hci_run(); 2697 } 2698 2699 void gap_discoverable_control(uint8_t enable){ 2700 if (enable) enable = 1; // normalize argument 2701 2702 if (hci_stack->discoverable == enable){ 2703 hci_emit_discoverable_enabled(hci_stack->discoverable); 2704 return; 2705 } 2706 2707 hci_stack->discoverable = enable; 2708 hci_update_scan_enable(); 2709 } 2710 2711 void gap_connectable_control(uint8_t enable){ 2712 if (enable) enable = 1; // normalize argument 2713 2714 // don't emit event 2715 if (hci_stack->connectable == enable) return; 2716 2717 hci_stack->connectable = enable; 2718 hci_update_scan_enable(); 2719 } 2720 #endif 2721 2722 void gap_local_bd_addr(bd_addr_t address_buffer){ 2723 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2724 } 2725 2726 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2727 static void hci_host_num_completed_packets(void){ 2728 2729 // create packet manually as arrays are not supported and num_commands should not get reduced 2730 hci_reserve_packet_buffer(); 2731 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2732 2733 uint16_t size = 0; 2734 uint16_t num_handles = 0; 2735 packet[size++] = 0x35; 2736 packet[size++] = 0x0c; 2737 size++; // skip param len 2738 size++; // skip num handles 2739 2740 // add { handle, packets } entries 2741 btstack_linked_item_t * it; 2742 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2743 hci_connection_t * connection = (hci_connection_t *) it; 2744 if (connection->num_packets_completed){ 2745 little_endian_store_16(packet, size, connection->con_handle); 2746 size += 2; 2747 little_endian_store_16(packet, size, connection->num_packets_completed); 2748 size += 2; 2749 // 2750 num_handles++; 2751 connection->num_packets_completed = 0; 2752 } 2753 } 2754 2755 packet[2] = size - 3; 2756 packet[3] = num_handles; 2757 2758 hci_stack->host_completed_packets = 0; 2759 2760 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2761 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2762 2763 // release packet buffer for synchronous transport implementations 2764 if (hci_transport_synchronous()){ 2765 hci_stack->hci_packet_buffer_reserved = 0; 2766 } 2767 } 2768 #endif 2769 2770 static void hci_run(void){ 2771 2772 // log_info("hci_run: entered"); 2773 btstack_linked_item_t * it; 2774 2775 // send continuation fragments first, as they block the prepared packet buffer 2776 if (hci_stack->acl_fragmentation_total_size > 0) { 2777 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2778 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2779 if (connection) { 2780 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2781 hci_send_acl_packet_fragments(connection); 2782 return; 2783 } 2784 } else { 2785 // connection gone -> discard further fragments 2786 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2787 hci_stack->acl_fragmentation_total_size = 0; 2788 hci_stack->acl_fragmentation_pos = 0; 2789 } 2790 } 2791 2792 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2793 // send host num completed packets next as they don't require num_cmd_packets > 0 2794 if (!hci_can_send_comand_packet_transport()) return; 2795 if (hci_stack->host_completed_packets){ 2796 hci_host_num_completed_packets(); 2797 return; 2798 } 2799 #endif 2800 2801 if (!hci_can_send_command_packet_now()) return; 2802 2803 // global/non-connection oriented commands 2804 2805 #ifdef ENABLE_CLASSIC 2806 // decline incoming connections 2807 if (hci_stack->decline_reason){ 2808 uint8_t reason = hci_stack->decline_reason; 2809 hci_stack->decline_reason = 0; 2810 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2811 return; 2812 } 2813 // send scan enable 2814 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2815 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2816 hci_stack->new_scan_enable_value = 0xff; 2817 return; 2818 } 2819 // start/stop inquiry 2820 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2821 uint8_t duration = hci_stack->inquiry_state; 2822 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2823 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2824 return; 2825 } 2826 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2827 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2828 hci_send_cmd(&hci_inquiry_cancel); 2829 return; 2830 } 2831 // remote name request 2832 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2833 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2834 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2835 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2836 return; 2837 } 2838 // pairing 2839 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2840 uint8_t state = hci_stack->gap_pairing_state; 2841 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2842 switch (state){ 2843 case GAP_PAIRING_STATE_SEND_PIN: 2844 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2845 break; 2846 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2847 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2848 break; 2849 case GAP_PAIRING_STATE_SEND_PASSKEY: 2850 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2851 break; 2852 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2853 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2854 break; 2855 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2856 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2857 break; 2858 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2859 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2860 break; 2861 default: 2862 break; 2863 } 2864 return; 2865 } 2866 #endif 2867 2868 #ifdef ENABLE_BLE 2869 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2870 if ((hci_stack->state == HCI_STATE_WORKING) 2871 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2872 2873 #ifdef ENABLE_LE_CENTRAL 2874 // handle le scan 2875 switch(hci_stack->le_scanning_state){ 2876 case LE_START_SCAN: 2877 hci_stack->le_scanning_state = LE_SCANNING; 2878 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2879 return; 2880 2881 case LE_STOP_SCAN: 2882 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2883 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2884 return; 2885 default: 2886 break; 2887 } 2888 if (hci_stack->le_scan_type != 0xff){ 2889 // defaults: active scanning, accept all advertisement packets 2890 int scan_type = hci_stack->le_scan_type; 2891 hci_stack->le_scan_type = 0xff; 2892 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); 2893 return; 2894 } 2895 #endif 2896 #ifdef ENABLE_LE_PERIPHERAL 2897 // le advertisement control 2898 if (hci_stack->le_advertisements_todo){ 2899 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2900 } 2901 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2902 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2903 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2904 return; 2905 } 2906 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2907 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2908 hci_send_cmd(&hci_le_set_advertising_parameters, 2909 hci_stack->le_advertisements_interval_min, 2910 hci_stack->le_advertisements_interval_max, 2911 hci_stack->le_advertisements_type, 2912 hci_stack->le_own_addr_type, 2913 hci_stack->le_advertisements_direct_address_type, 2914 hci_stack->le_advertisements_direct_address, 2915 hci_stack->le_advertisements_channel_map, 2916 hci_stack->le_advertisements_filter_policy); 2917 return; 2918 } 2919 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2920 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2921 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2922 return; 2923 } 2924 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2925 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2926 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2927 hci_stack->le_scan_response_data); 2928 return; 2929 } 2930 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2931 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2932 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2933 return; 2934 } 2935 #endif 2936 2937 #ifdef ENABLE_LE_CENTRAL 2938 // 2939 // LE Whitelist Management 2940 // 2941 2942 // check if whitelist needs modification 2943 btstack_linked_list_iterator_t lit; 2944 int modification_pending = 0; 2945 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2946 while (btstack_linked_list_iterator_has_next(&lit)){ 2947 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2948 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2949 modification_pending = 1; 2950 break; 2951 } 2952 } 2953 2954 if (modification_pending){ 2955 // stop connnecting if modification pending 2956 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2957 hci_send_cmd(&hci_le_create_connection_cancel); 2958 return; 2959 } 2960 2961 // add/remove entries 2962 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2963 while (btstack_linked_list_iterator_has_next(&lit)){ 2964 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2965 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2966 entry->state = LE_WHITELIST_ON_CONTROLLER; 2967 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2968 return; 2969 2970 } 2971 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2972 bd_addr_t address; 2973 bd_addr_type_t address_type = entry->address_type; 2974 memcpy(address, entry->address, 6); 2975 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2976 btstack_memory_whitelist_entry_free(entry); 2977 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2978 return; 2979 } 2980 } 2981 } 2982 2983 // start connecting 2984 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2985 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2986 bd_addr_t null_addr; 2987 memset(null_addr, 0, 6); 2988 hci_send_cmd(&hci_le_create_connection, 2989 0x0060, // scan interval: 60 ms 2990 0x0030, // scan interval: 30 ms 2991 1, // use whitelist 2992 0, // peer address type 2993 null_addr, // peer bd addr 2994 hci_stack->le_own_addr_type, // our addr type: 2995 hci_stack->le_connection_interval_min, // conn interval min 2996 hci_stack->le_connection_interval_max, // conn interval max 2997 hci_stack->le_connection_latency, // conn latency 2998 hci_stack->le_supervision_timeout, // conn latency 2999 hci_stack->le_minimum_ce_length, // min ce length 3000 hci_stack->le_maximum_ce_length // max ce length 3001 ); 3002 return; 3003 } 3004 #endif 3005 } 3006 #endif 3007 3008 // send pending HCI commands 3009 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3010 hci_connection_t * connection = (hci_connection_t *) it; 3011 3012 switch(connection->state){ 3013 case SEND_CREATE_CONNECTION: 3014 switch(connection->address_type){ 3015 #ifdef ENABLE_CLASSIC 3016 case BD_ADDR_TYPE_CLASSIC: 3017 log_info("sending hci_create_connection"); 3018 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3019 break; 3020 #endif 3021 default: 3022 #ifdef ENABLE_BLE 3023 #ifdef ENABLE_LE_CENTRAL 3024 log_info("sending hci_le_create_connection"); 3025 hci_send_cmd(&hci_le_create_connection, 3026 0x0060, // scan interval: 60 ms 3027 0x0030, // scan interval: 30 ms 3028 0, // don't use whitelist 3029 connection->address_type, // peer address type 3030 connection->address, // peer bd addr 3031 hci_stack->le_own_addr_type, // our addr type: 3032 hci_stack->le_connection_interval_min, // conn interval min 3033 hci_stack->le_connection_interval_max, // conn interval max 3034 hci_stack->le_connection_latency, // conn latency 3035 hci_stack->le_supervision_timeout, // conn latency 3036 hci_stack->le_minimum_ce_length, // min ce length 3037 hci_stack->le_maximum_ce_length // max ce length 3038 ); 3039 connection->state = SENT_CREATE_CONNECTION; 3040 #endif 3041 #endif 3042 break; 3043 } 3044 return; 3045 3046 #ifdef ENABLE_CLASSIC 3047 case RECEIVED_CONNECTION_REQUEST: 3048 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3049 connection->state = ACCEPTED_CONNECTION_REQUEST; 3050 connection->role = HCI_ROLE_SLAVE; 3051 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3052 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3053 } 3054 return; 3055 #endif 3056 3057 #ifdef ENABLE_BLE 3058 #ifdef ENABLE_LE_CENTRAL 3059 case SEND_CANCEL_CONNECTION: 3060 connection->state = SENT_CANCEL_CONNECTION; 3061 hci_send_cmd(&hci_le_create_connection_cancel); 3062 return; 3063 #endif 3064 #endif 3065 case SEND_DISCONNECT: 3066 connection->state = SENT_DISCONNECT; 3067 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3068 return; 3069 3070 default: 3071 break; 3072 } 3073 3074 #ifdef ENABLE_CLASSIC 3075 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3076 log_info("responding to link key request"); 3077 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3078 link_key_t link_key; 3079 link_key_type_t link_key_type; 3080 if ( hci_stack->link_key_db 3081 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3082 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3083 connection->link_key_type = link_key_type; 3084 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3085 } else { 3086 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3087 } 3088 return; 3089 } 3090 3091 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3092 log_info("denying to pin request"); 3093 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3094 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3095 return; 3096 } 3097 3098 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3099 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3100 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3101 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3102 // tweak authentication requirements 3103 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3104 if (connection->bonding_flags & BONDING_DEDICATED){ 3105 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3106 } 3107 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3108 authreq |= 1; 3109 } 3110 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3111 } else { 3112 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3113 } 3114 return; 3115 } 3116 3117 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3118 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3119 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3120 return; 3121 } 3122 3123 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3124 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3125 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3126 return; 3127 } 3128 3129 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3130 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3131 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3132 return; 3133 } 3134 3135 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3136 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3137 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3138 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3139 return; 3140 } 3141 3142 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3143 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3144 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3145 return; 3146 } 3147 3148 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3149 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3150 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3151 return; 3152 } 3153 #endif 3154 3155 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3156 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3157 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3158 return; 3159 } 3160 3161 #ifdef ENABLE_BLE 3162 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3163 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3164 3165 uint16_t connection_interval_min = connection->le_conn_interval_min; 3166 connection->le_conn_interval_min = 0; 3167 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3168 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3169 0x0000, 0xffff); 3170 } 3171 #endif 3172 } 3173 3174 hci_connection_t * connection; 3175 switch (hci_stack->state){ 3176 case HCI_STATE_INITIALIZING: 3177 hci_initializing_run(); 3178 break; 3179 3180 case HCI_STATE_HALTING: 3181 3182 log_info("HCI_STATE_HALTING"); 3183 3184 // free whitelist entries 3185 #ifdef ENABLE_BLE 3186 #ifdef ENABLE_LE_CENTRAL 3187 { 3188 btstack_linked_list_iterator_t lit; 3189 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3190 while (btstack_linked_list_iterator_has_next(&lit)){ 3191 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3192 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3193 btstack_memory_whitelist_entry_free(entry); 3194 } 3195 } 3196 #endif 3197 #endif 3198 // close all open connections 3199 connection = (hci_connection_t *) hci_stack->connections; 3200 if (connection){ 3201 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3202 if (!hci_can_send_command_packet_now()) return; 3203 3204 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3205 3206 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3207 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3208 3209 // ... which would be ignored anyway as we shutdown (free) the connection now 3210 hci_shutdown_connection(connection); 3211 3212 // finally, send the disconnect command 3213 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3214 return; 3215 } 3216 log_info("HCI_STATE_HALTING, calling off"); 3217 3218 // switch mode 3219 hci_power_control_off(); 3220 3221 log_info("HCI_STATE_HALTING, emitting state"); 3222 hci_emit_state(); 3223 log_info("HCI_STATE_HALTING, done"); 3224 break; 3225 3226 case HCI_STATE_FALLING_ASLEEP: 3227 switch(hci_stack->substate) { 3228 case HCI_FALLING_ASLEEP_DISCONNECT: 3229 log_info("HCI_STATE_FALLING_ASLEEP"); 3230 // close all open connections 3231 connection = (hci_connection_t *) hci_stack->connections; 3232 3233 #ifdef HAVE_PLATFORM_IPHONE_OS 3234 // don't close connections, if H4 supports power management 3235 if (btstack_control_iphone_power_management_enabled()){ 3236 connection = NULL; 3237 } 3238 #endif 3239 if (connection){ 3240 3241 // send disconnect 3242 if (!hci_can_send_command_packet_now()) return; 3243 3244 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3245 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3246 3247 // send disconnected event right away - causes higher layer connections to get closed, too. 3248 hci_shutdown_connection(connection); 3249 return; 3250 } 3251 3252 if (hci_classic_supported()){ 3253 // disable page and inquiry scan 3254 if (!hci_can_send_command_packet_now()) return; 3255 3256 log_info("HCI_STATE_HALTING, disabling inq scans"); 3257 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3258 3259 // continue in next sub state 3260 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3261 break; 3262 } 3263 // no break - fall through for ble-only chips 3264 3265 case HCI_FALLING_ASLEEP_COMPLETE: 3266 log_info("HCI_STATE_HALTING, calling sleep"); 3267 #ifdef HAVE_PLATFORM_IPHONE_OS 3268 // don't actually go to sleep, if H4 supports power management 3269 if (btstack_control_iphone_power_management_enabled()){ 3270 // SLEEP MODE reached 3271 hci_stack->state = HCI_STATE_SLEEPING; 3272 hci_emit_state(); 3273 break; 3274 } 3275 #endif 3276 // switch mode 3277 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3278 hci_emit_state(); 3279 break; 3280 3281 default: 3282 break; 3283 } 3284 break; 3285 3286 default: 3287 break; 3288 } 3289 } 3290 3291 int hci_send_cmd_packet(uint8_t *packet, int size){ 3292 // house-keeping 3293 3294 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3295 hci_stack->loopback_mode = packet[3]; 3296 } 3297 3298 #ifdef ENABLE_CLASSIC 3299 bd_addr_t addr; 3300 hci_connection_t * conn; 3301 3302 // create_connection? 3303 if (IS_COMMAND(packet, hci_create_connection)){ 3304 reverse_bd_addr(&packet[3], addr); 3305 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3306 3307 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3308 if (!conn){ 3309 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3310 if (!conn){ 3311 // notify client that alloc failed 3312 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3313 return 0; // don't sent packet to controller 3314 } 3315 conn->state = SEND_CREATE_CONNECTION; 3316 } 3317 log_info("conn state %u", conn->state); 3318 switch (conn->state){ 3319 // if connection active exists 3320 case OPEN: 3321 // and OPEN, emit connection complete command, don't send to controller 3322 hci_emit_connection_complete(addr, conn->con_handle, 0); 3323 return 0; 3324 case SEND_CREATE_CONNECTION: 3325 // connection created by hci, e.g. dedicated bonding 3326 break; 3327 default: 3328 // otherwise, just ignore as it is already in the open process 3329 return 0; 3330 } 3331 conn->state = SENT_CREATE_CONNECTION; 3332 } 3333 3334 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3335 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3336 } 3337 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3338 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3339 } 3340 3341 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3342 if (hci_stack->link_key_db){ 3343 reverse_bd_addr(&packet[3], addr); 3344 hci_stack->link_key_db->delete_link_key(addr); 3345 } 3346 } 3347 3348 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3349 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3350 reverse_bd_addr(&packet[3], addr); 3351 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3352 if (conn){ 3353 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3354 } 3355 } 3356 3357 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3358 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3359 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3360 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3361 reverse_bd_addr(&packet[3], addr); 3362 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3363 if (conn){ 3364 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3365 } 3366 } 3367 3368 #ifdef ENABLE_SCO_OVER_HCI 3369 // setup_synchronous_connection? Voice setting at offset 22 3370 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3371 // TODO: compare to current setting if sco connection already active 3372 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3373 } 3374 // accept_synchronus_connection? Voice setting at offset 18 3375 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3376 // TODO: compare to current setting if sco connection already active 3377 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3378 } 3379 #endif 3380 #endif 3381 3382 #ifdef ENABLE_BLE 3383 #ifdef ENABLE_LE_PERIPHERAL 3384 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3385 hci_stack->le_random_address_set = 1; 3386 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3387 } 3388 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3389 hci_stack->le_advertisements_active = packet[3]; 3390 } 3391 #endif 3392 #ifdef ENABLE_LE_CENTRAL 3393 if (IS_COMMAND(packet, hci_le_create_connection)){ 3394 // white list used? 3395 uint8_t initiator_filter_policy = packet[7]; 3396 switch (initiator_filter_policy){ 3397 case 0: 3398 // whitelist not used 3399 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3400 break; 3401 case 1: 3402 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3403 break; 3404 default: 3405 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3406 break; 3407 } 3408 } 3409 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3410 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3411 } 3412 #endif 3413 #endif 3414 3415 hci_stack->num_cmd_packets--; 3416 3417 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3418 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3419 3420 // release packet buffer for synchronous transport implementations 3421 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3422 hci_stack->hci_packet_buffer_reserved = 0; 3423 } 3424 3425 return err; 3426 } 3427 3428 // disconnect because of security block 3429 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3430 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3431 if (!connection) return; 3432 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3433 } 3434 3435 3436 // Configure Secure Simple Pairing 3437 3438 #ifdef ENABLE_CLASSIC 3439 3440 // enable will enable SSP during init 3441 void gap_ssp_set_enable(int enable){ 3442 hci_stack->ssp_enable = enable; 3443 } 3444 3445 static int hci_local_ssp_activated(void){ 3446 return gap_ssp_supported() && hci_stack->ssp_enable; 3447 } 3448 3449 // if set, BTstack will respond to io capability request using authentication requirement 3450 void gap_ssp_set_io_capability(int io_capability){ 3451 hci_stack->ssp_io_capability = io_capability; 3452 } 3453 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3454 hci_stack->ssp_authentication_requirement = authentication_requirement; 3455 } 3456 3457 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3458 void gap_ssp_set_auto_accept(int auto_accept){ 3459 hci_stack->ssp_auto_accept = auto_accept; 3460 } 3461 #endif 3462 3463 // va_list part of hci_send_cmd 3464 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3465 if (!hci_can_send_command_packet_now()){ 3466 log_error("hci_send_cmd called but cannot send packet now"); 3467 return 0; 3468 } 3469 3470 // for HCI INITIALIZATION 3471 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3472 hci_stack->last_cmd_opcode = cmd->opcode; 3473 3474 hci_reserve_packet_buffer(); 3475 uint8_t * packet = hci_stack->hci_packet_buffer; 3476 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3477 return hci_send_cmd_packet(packet, size); 3478 } 3479 3480 /** 3481 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3482 */ 3483 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3484 va_list argptr; 3485 va_start(argptr, cmd); 3486 int res = hci_send_cmd_va_arg(cmd, argptr); 3487 va_end(argptr); 3488 return res; 3489 } 3490 3491 // Create various non-HCI events. 3492 // TODO: generalize, use table similar to hci_create_command 3493 3494 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3495 // dump packet 3496 if (dump) { 3497 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3498 } 3499 3500 // dispatch to all event handlers 3501 btstack_linked_list_iterator_t it; 3502 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3503 while (btstack_linked_list_iterator_has_next(&it)){ 3504 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3505 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3506 } 3507 } 3508 3509 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3510 if (!hci_stack->acl_packet_handler) return; 3511 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3512 } 3513 3514 #ifdef ENABLE_CLASSIC 3515 static void hci_notify_if_sco_can_send_now(void){ 3516 // notify SCO sender if waiting 3517 if (!hci_stack->sco_waiting_for_can_send_now) return; 3518 if (hci_can_send_sco_packet_now()){ 3519 hci_stack->sco_waiting_for_can_send_now = 0; 3520 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3521 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3522 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3523 } 3524 } 3525 3526 // parsing end emitting has been merged to reduce code size 3527 static void gap_inquiry_explode(uint8_t * packet){ 3528 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3529 3530 uint8_t * eir_data; 3531 ad_context_t context; 3532 const uint8_t * name; 3533 uint8_t name_len; 3534 3535 int event_type = hci_event_packet_get_type(packet); 3536 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3537 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3538 3539 // event[1] is set at the end 3540 int i; 3541 for (i=0; i<num_responses;i++){ 3542 memset(event, 0, sizeof(event)); 3543 event[0] = GAP_EVENT_INQUIRY_RESULT; 3544 uint8_t event_size = 18; // if name is not set by EIR 3545 3546 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3547 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3548 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3549 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3550 3551 switch (event_type){ 3552 case HCI_EVENT_INQUIRY_RESULT: 3553 // 14,15,16,17 = 0, size 18 3554 break; 3555 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3556 event[14] = 1; 3557 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3558 // 16,17 = 0, size 18 3559 break; 3560 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3561 event[14] = 1; 3562 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3563 // for EIR packets, there is only one reponse in it 3564 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3565 name = NULL; 3566 // EIR data is 240 bytes in EIR event 3567 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3568 uint8_t data_type = ad_iterator_get_data_type(&context); 3569 uint8_t data_size = ad_iterator_get_data_len(&context); 3570 const uint8_t * data = ad_iterator_get_data(&context); 3571 // Prefer Complete Local Name over Shortend Local Name 3572 switch (data_type){ 3573 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3574 if (name) continue; 3575 /* explicit fall-through */ 3576 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3577 name = data; 3578 name_len = data_size; 3579 break; 3580 default: 3581 break; 3582 } 3583 } 3584 if (name){ 3585 event[16] = 1; 3586 // truncate name if needed 3587 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3588 event[17] = len; 3589 memcpy(&event[18], name, len); 3590 event_size += len; 3591 } 3592 break; 3593 } 3594 event[1] = event_size - 2; 3595 hci_emit_event(event, event_size, 1); 3596 } 3597 } 3598 #endif 3599 3600 void hci_emit_state(void){ 3601 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3602 uint8_t event[3]; 3603 event[0] = BTSTACK_EVENT_STATE; 3604 event[1] = sizeof(event) - 2; 3605 event[2] = hci_stack->state; 3606 hci_emit_event(event, sizeof(event), 1); 3607 } 3608 3609 #ifdef ENABLE_CLASSIC 3610 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3611 uint8_t event[13]; 3612 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3613 event[1] = sizeof(event) - 2; 3614 event[2] = status; 3615 little_endian_store_16(event, 3, con_handle); 3616 reverse_bd_addr(address, &event[5]); 3617 event[11] = 1; // ACL connection 3618 event[12] = 0; // encryption disabled 3619 hci_emit_event(event, sizeof(event), 1); 3620 } 3621 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3622 if (disable_l2cap_timeouts) return; 3623 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3624 uint8_t event[4]; 3625 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3626 event[1] = sizeof(event) - 2; 3627 little_endian_store_16(event, 2, conn->con_handle); 3628 hci_emit_event(event, sizeof(event), 1); 3629 } 3630 #endif 3631 3632 #ifdef ENABLE_BLE 3633 #ifdef ENABLE_LE_CENTRAL 3634 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3635 uint8_t event[21]; 3636 event[0] = HCI_EVENT_LE_META; 3637 event[1] = sizeof(event) - 2; 3638 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3639 event[3] = status; 3640 little_endian_store_16(event, 4, con_handle); 3641 event[6] = 0; // TODO: role 3642 event[7] = address_type; 3643 reverse_bd_addr(address, &event[8]); 3644 little_endian_store_16(event, 14, 0); // interval 3645 little_endian_store_16(event, 16, 0); // latency 3646 little_endian_store_16(event, 18, 0); // supervision timeout 3647 event[20] = 0; // master clock accuracy 3648 hci_emit_event(event, sizeof(event), 1); 3649 } 3650 #endif 3651 #endif 3652 3653 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3654 uint8_t event[6]; 3655 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3656 event[1] = sizeof(event) - 2; 3657 event[2] = 0; // status = OK 3658 little_endian_store_16(event, 3, con_handle); 3659 event[5] = reason; 3660 hci_emit_event(event, sizeof(event), 1); 3661 } 3662 3663 static void hci_emit_nr_connections_changed(void){ 3664 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3665 uint8_t event[3]; 3666 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3667 event[1] = sizeof(event) - 2; 3668 event[2] = nr_hci_connections(); 3669 hci_emit_event(event, sizeof(event), 1); 3670 } 3671 3672 static void hci_emit_hci_open_failed(void){ 3673 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3674 uint8_t event[2]; 3675 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3676 event[1] = sizeof(event) - 2; 3677 hci_emit_event(event, sizeof(event), 1); 3678 } 3679 3680 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3681 log_info("hci_emit_dedicated_bonding_result %u ", status); 3682 uint8_t event[9]; 3683 int pos = 0; 3684 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3685 event[pos++] = sizeof(event) - 2; 3686 event[pos++] = status; 3687 reverse_bd_addr(address, &event[pos]); 3688 hci_emit_event(event, sizeof(event), 1); 3689 } 3690 3691 3692 #ifdef ENABLE_CLASSIC 3693 3694 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3695 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3696 uint8_t event[5]; 3697 int pos = 0; 3698 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3699 event[pos++] = sizeof(event) - 2; 3700 little_endian_store_16(event, 2, con_handle); 3701 pos += 2; 3702 event[pos++] = level; 3703 hci_emit_event(event, sizeof(event), 1); 3704 } 3705 3706 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3707 if (!connection) return LEVEL_0; 3708 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3709 return gap_security_level_for_link_key_type(connection->link_key_type); 3710 } 3711 3712 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3713 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3714 uint8_t event[3]; 3715 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3716 event[1] = sizeof(event) - 2; 3717 event[2] = enabled; 3718 hci_emit_event(event, sizeof(event), 1); 3719 } 3720 3721 #ifdef ENABLE_CLASSIC 3722 // query if remote side supports eSCO 3723 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3724 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3725 if (!connection) return 0; 3726 return connection->remote_supported_feature_eSCO; 3727 } 3728 3729 // query if remote side supports SSP 3730 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3731 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3732 if (!connection) return 0; 3733 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3734 } 3735 3736 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3737 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3738 } 3739 #endif 3740 3741 // GAP API 3742 /** 3743 * @bbrief enable/disable bonding. default is enabled 3744 * @praram enabled 3745 */ 3746 void gap_set_bondable_mode(int enable){ 3747 hci_stack->bondable = enable ? 1 : 0; 3748 } 3749 /** 3750 * @brief Get bondable mode. 3751 * @return 1 if bondable 3752 */ 3753 int gap_get_bondable_mode(void){ 3754 return hci_stack->bondable; 3755 } 3756 3757 /** 3758 * @brief map link keys to security levels 3759 */ 3760 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3761 switch (link_key_type){ 3762 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3763 return LEVEL_4; 3764 case COMBINATION_KEY: 3765 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3766 return LEVEL_3; 3767 default: 3768 return LEVEL_2; 3769 } 3770 } 3771 3772 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3773 log_info("gap_mitm_protection_required_for_security_level %u", level); 3774 return level > LEVEL_2; 3775 } 3776 3777 /** 3778 * @brief get current security level 3779 */ 3780 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3781 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3782 if (!connection) return LEVEL_0; 3783 return gap_security_level_for_connection(connection); 3784 } 3785 3786 /** 3787 * @brief request connection to device to 3788 * @result GAP_AUTHENTICATION_RESULT 3789 */ 3790 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3791 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3792 if (!connection){ 3793 hci_emit_security_level(con_handle, LEVEL_0); 3794 return; 3795 } 3796 gap_security_level_t current_level = gap_security_level(con_handle); 3797 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3798 if (current_level >= requested_level){ 3799 hci_emit_security_level(con_handle, current_level); 3800 return; 3801 } 3802 3803 connection->requested_security_level = requested_level; 3804 3805 #if 0 3806 // sending encryption request without a link key results in an error. 3807 // TODO: figure out how to use it properly 3808 3809 // would enabling ecnryption suffice (>= LEVEL_2)? 3810 if (hci_stack->link_key_db){ 3811 link_key_type_t link_key_type; 3812 link_key_t link_key; 3813 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3814 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3815 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3816 return; 3817 } 3818 } 3819 } 3820 #endif 3821 3822 // try to authenticate connection 3823 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3824 hci_run(); 3825 } 3826 3827 /** 3828 * @brief start dedicated bonding with device. disconnect after bonding 3829 * @param device 3830 * @param request MITM protection 3831 * @result GAP_DEDICATED_BONDING_COMPLETE 3832 */ 3833 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3834 3835 // create connection state machine 3836 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3837 3838 if (!connection){ 3839 return BTSTACK_MEMORY_ALLOC_FAILED; 3840 } 3841 3842 // delete linkn key 3843 gap_drop_link_key_for_bd_addr(device); 3844 3845 // configure LEVEL_2/3, dedicated bonding 3846 connection->state = SEND_CREATE_CONNECTION; 3847 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3848 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3849 connection->bonding_flags = BONDING_DEDICATED; 3850 3851 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3852 3853 // handle: connnection failure (connection complete != ok) 3854 // handle: authentication failure 3855 // handle: disconnect on done 3856 3857 hci_run(); 3858 3859 return 0; 3860 } 3861 #endif 3862 3863 void gap_set_local_name(const char * local_name){ 3864 hci_stack->local_name = local_name; 3865 } 3866 3867 3868 #ifdef ENABLE_BLE 3869 3870 #ifdef ENABLE_LE_CENTRAL 3871 void gap_start_scan(void){ 3872 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3873 hci_stack->le_scanning_state = LE_START_SCAN; 3874 hci_run(); 3875 } 3876 3877 void gap_stop_scan(void){ 3878 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3879 hci_stack->le_scanning_state = LE_STOP_SCAN; 3880 hci_run(); 3881 } 3882 3883 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3884 hci_stack->le_scan_type = scan_type; 3885 hci_stack->le_scan_interval = scan_interval; 3886 hci_stack->le_scan_window = scan_window; 3887 hci_run(); 3888 } 3889 3890 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3891 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3892 if (!conn){ 3893 log_info("gap_connect: no connection exists yet, creating context"); 3894 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3895 if (!conn){ 3896 // notify client that alloc failed 3897 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3898 log_info("gap_connect: failed to alloc hci_connection_t"); 3899 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3900 } 3901 conn->state = SEND_CREATE_CONNECTION; 3902 log_info("gap_connect: send create connection next"); 3903 hci_run(); 3904 return 0; 3905 } 3906 3907 if (!hci_is_le_connection(conn) || 3908 conn->state == SEND_CREATE_CONNECTION || 3909 conn->state == SENT_CREATE_CONNECTION) { 3910 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3911 log_error("gap_connect: classic connection or connect is already being created"); 3912 return GATT_CLIENT_IN_WRONG_STATE; 3913 } 3914 3915 log_info("gap_connect: context exists with state %u", conn->state); 3916 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3917 hci_run(); 3918 return 0; 3919 } 3920 3921 // @assumption: only a single outgoing LE Connection exists 3922 static hci_connection_t * gap_get_outgoing_connection(void){ 3923 btstack_linked_item_t *it; 3924 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3925 hci_connection_t * conn = (hci_connection_t *) it; 3926 if (!hci_is_le_connection(conn)) continue; 3927 switch (conn->state){ 3928 case SEND_CREATE_CONNECTION: 3929 case SENT_CREATE_CONNECTION: 3930 return conn; 3931 default: 3932 break; 3933 }; 3934 } 3935 return NULL; 3936 } 3937 3938 uint8_t gap_connect_cancel(void){ 3939 hci_connection_t * conn = gap_get_outgoing_connection(); 3940 if (!conn) return 0; 3941 switch (conn->state){ 3942 case SEND_CREATE_CONNECTION: 3943 // skip sending create connection and emit event instead 3944 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3945 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3946 btstack_memory_hci_connection_free( conn ); 3947 break; 3948 case SENT_CREATE_CONNECTION: 3949 // request to send cancel connection 3950 conn->state = SEND_CANCEL_CONNECTION; 3951 hci_run(); 3952 break; 3953 default: 3954 break; 3955 } 3956 return 0; 3957 } 3958 #endif 3959 3960 #ifdef ENABLE_LE_CENTRAL 3961 /** 3962 * @brief Set connection parameters for outgoing connections 3963 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 3964 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 3965 * @param conn_latency, default: 4 3966 * @param supervision_timeout (unit: 10ms), default: 720 ms 3967 * @param min_ce_length (unit: 0.625ms), default: 10 ms 3968 * @param max_ce_length (unit: 0.625ms), default: 30 ms 3969 */ 3970 3971 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 3972 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 3973 hci_stack->le_connection_interval_min = conn_interval_min; 3974 hci_stack->le_connection_interval_max = conn_interval_max; 3975 hci_stack->le_connection_latency = conn_latency; 3976 hci_stack->le_supervision_timeout = supervision_timeout; 3977 hci_stack->le_minimum_ce_length = min_ce_length; 3978 hci_stack->le_maximum_ce_length = max_ce_length; 3979 } 3980 #endif 3981 3982 /** 3983 * @brief Updates the connection parameters for a given LE connection 3984 * @param handle 3985 * @param conn_interval_min (unit: 1.25ms) 3986 * @param conn_interval_max (unit: 1.25ms) 3987 * @param conn_latency 3988 * @param supervision_timeout (unit: 10ms) 3989 * @returns 0 if ok 3990 */ 3991 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3992 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3993 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3994 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3995 connection->le_conn_interval_min = conn_interval_min; 3996 connection->le_conn_interval_max = conn_interval_max; 3997 connection->le_conn_latency = conn_latency; 3998 connection->le_supervision_timeout = supervision_timeout; 3999 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4000 hci_run(); 4001 return 0; 4002 } 4003 4004 /** 4005 * @brief Request an update of the connection parameter for a given LE connection 4006 * @param handle 4007 * @param conn_interval_min (unit: 1.25ms) 4008 * @param conn_interval_max (unit: 1.25ms) 4009 * @param conn_latency 4010 * @param supervision_timeout (unit: 10ms) 4011 * @returns 0 if ok 4012 */ 4013 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4014 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4015 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4016 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4017 connection->le_conn_interval_min = conn_interval_min; 4018 connection->le_conn_interval_max = conn_interval_max; 4019 connection->le_conn_latency = conn_latency; 4020 connection->le_supervision_timeout = supervision_timeout; 4021 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4022 hci_run(); 4023 return 0; 4024 } 4025 4026 #ifdef ENABLE_LE_PERIPHERAL 4027 4028 static void gap_advertisments_changed(void){ 4029 // disable advertisements before updating adv, scan data, or adv params 4030 if (hci_stack->le_advertisements_active){ 4031 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4032 } 4033 hci_run(); 4034 } 4035 4036 /** 4037 * @brief Set Advertisement Data 4038 * @param advertising_data_length 4039 * @param advertising_data (max 31 octets) 4040 * @note data is not copied, pointer has to stay valid 4041 */ 4042 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4043 hci_stack->le_advertisements_data_len = advertising_data_length; 4044 hci_stack->le_advertisements_data = advertising_data; 4045 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4046 gap_advertisments_changed(); 4047 } 4048 4049 /** 4050 * @brief Set Scan Response Data 4051 * @param advertising_data_length 4052 * @param advertising_data (max 31 octets) 4053 * @note data is not copied, pointer has to stay valid 4054 */ 4055 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4056 hci_stack->le_scan_response_data_len = scan_response_data_length; 4057 hci_stack->le_scan_response_data = scan_response_data; 4058 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4059 gap_advertisments_changed(); 4060 } 4061 4062 /** 4063 * @brief Set Advertisement Parameters 4064 * @param adv_int_min 4065 * @param adv_int_max 4066 * @param adv_type 4067 * @param direct_address_type 4068 * @param direct_address 4069 * @param channel_map 4070 * @param filter_policy 4071 * 4072 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4073 */ 4074 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4075 uint8_t direct_address_typ, bd_addr_t direct_address, 4076 uint8_t channel_map, uint8_t filter_policy) { 4077 4078 hci_stack->le_advertisements_interval_min = adv_int_min; 4079 hci_stack->le_advertisements_interval_max = adv_int_max; 4080 hci_stack->le_advertisements_type = adv_type; 4081 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4082 hci_stack->le_advertisements_channel_map = channel_map; 4083 hci_stack->le_advertisements_filter_policy = filter_policy; 4084 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4085 4086 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4087 gap_advertisments_changed(); 4088 } 4089 4090 /** 4091 * @brief Enable/Disable Advertisements 4092 * @param enabled 4093 */ 4094 void gap_advertisements_enable(int enabled){ 4095 hci_stack->le_advertisements_enabled = enabled; 4096 if (enabled && !hci_stack->le_advertisements_active){ 4097 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4098 } 4099 if (!enabled && hci_stack->le_advertisements_active){ 4100 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4101 } 4102 hci_run(); 4103 } 4104 4105 #endif 4106 4107 void hci_le_set_own_address_type(uint8_t own_address_type){ 4108 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4109 if (own_address_type == hci_stack->le_own_addr_type) return; 4110 hci_stack->le_own_addr_type = own_address_type; 4111 4112 #ifdef ENABLE_LE_PERIPHERAL 4113 // update advertisement parameters, too 4114 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4115 gap_advertisments_changed(); 4116 #endif 4117 #ifdef ENABLE_LE_CENTRAL 4118 // note: we don't update scan parameters or modify ongoing connection attempts 4119 #endif 4120 } 4121 4122 #endif 4123 4124 uint8_t gap_disconnect(hci_con_handle_t handle){ 4125 hci_connection_t * conn = hci_connection_for_handle(handle); 4126 if (!conn){ 4127 hci_emit_disconnection_complete(handle, 0); 4128 return 0; 4129 } 4130 conn->state = SEND_DISCONNECT; 4131 hci_run(); 4132 return 0; 4133 } 4134 4135 /** 4136 * @brief Get connection type 4137 * @param con_handle 4138 * @result connection_type 4139 */ 4140 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4141 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4142 if (!conn) return GAP_CONNECTION_INVALID; 4143 switch (conn->address_type){ 4144 case BD_ADDR_TYPE_LE_PUBLIC: 4145 case BD_ADDR_TYPE_LE_RANDOM: 4146 return GAP_CONNECTION_LE; 4147 case BD_ADDR_TYPE_SCO: 4148 return GAP_CONNECTION_SCO; 4149 case BD_ADDR_TYPE_CLASSIC: 4150 return GAP_CONNECTION_ACL; 4151 default: 4152 return GAP_CONNECTION_INVALID; 4153 } 4154 } 4155 4156 #ifdef ENABLE_BLE 4157 4158 #ifdef ENABLE_LE_CENTRAL 4159 /** 4160 * @brief Auto Connection Establishment - Start Connecting to device 4161 * @param address_typ 4162 * @param address 4163 * @returns 0 if ok 4164 */ 4165 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4166 // check capacity 4167 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4168 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4169 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4170 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4171 entry->address_type = address_type; 4172 memcpy(entry->address, address, 6); 4173 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4174 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4175 hci_run(); 4176 return 0; 4177 } 4178 4179 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4180 btstack_linked_list_iterator_t it; 4181 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4182 while (btstack_linked_list_iterator_has_next(&it)){ 4183 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4184 if (entry->address_type != address_type) continue; 4185 if (memcmp(entry->address, address, 6) != 0) continue; 4186 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4187 // remove from controller if already present 4188 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4189 continue; 4190 } 4191 // direclty remove entry from whitelist 4192 btstack_linked_list_iterator_remove(&it); 4193 btstack_memory_whitelist_entry_free(entry); 4194 } 4195 } 4196 4197 /** 4198 * @brief Auto Connection Establishment - Stop Connecting to device 4199 * @param address_typ 4200 * @param address 4201 * @returns 0 if ok 4202 */ 4203 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4204 hci_remove_from_whitelist(address_type, address); 4205 hci_run(); 4206 return 0; 4207 } 4208 4209 /** 4210 * @brief Auto Connection Establishment - Stop everything 4211 * @note Convenience function to stop all active auto connection attempts 4212 */ 4213 void gap_auto_connection_stop_all(void){ 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->state & LE_WHITELIST_ON_CONTROLLER){ 4219 // remove from controller if already present 4220 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4221 continue; 4222 } 4223 // directly remove entry from whitelist 4224 btstack_linked_list_iterator_remove(&it); 4225 btstack_memory_whitelist_entry_free(entry); 4226 } 4227 hci_run(); 4228 } 4229 #endif 4230 #endif 4231 4232 #ifdef ENABLE_CLASSIC 4233 /** 4234 * @brief Set Extended Inquiry Response data 4235 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4236 * @note has to be done before stack starts up 4237 */ 4238 void gap_set_extended_inquiry_response(const uint8_t * data){ 4239 hci_stack->eir_data = data; 4240 } 4241 4242 /** 4243 * @brief Start GAP Classic Inquiry 4244 * @param duration in 1.28s units 4245 * @return 0 if ok 4246 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4247 */ 4248 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4249 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4250 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4251 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4252 } 4253 hci_stack->inquiry_state = duration_in_1280ms_units; 4254 hci_run(); 4255 return 0; 4256 } 4257 4258 /** 4259 * @brief Stop GAP Classic Inquiry 4260 * @returns 0 if ok 4261 */ 4262 int gap_inquiry_stop(void){ 4263 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4264 // emit inquiry complete event, before it even started 4265 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4266 hci_emit_event(event, sizeof(event), 1); 4267 return 0; 4268 } 4269 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4270 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4271 hci_run(); 4272 return 0; 4273 } 4274 4275 4276 /** 4277 * @brief Remote Name Request 4278 * @param addr 4279 * @param page_scan_repetition_mode 4280 * @param clock_offset only used when bit 15 is set 4281 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4282 */ 4283 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4284 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4285 memcpy(hci_stack->remote_name_addr, addr, 6); 4286 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4287 hci_stack->remote_name_clock_offset = clock_offset; 4288 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4289 hci_run(); 4290 return 0; 4291 } 4292 4293 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4294 hci_stack->gap_pairing_state = state; 4295 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4296 hci_run(); 4297 return 0; 4298 } 4299 4300 /** 4301 * @brief Legacy Pairing Pin Code Response 4302 * @param addr 4303 * @param pin 4304 * @return 0 if ok 4305 */ 4306 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4307 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4308 hci_stack->gap_pairing_pin = pin; 4309 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4310 } 4311 4312 /** 4313 * @brief Abort Legacy Pairing 4314 * @param addr 4315 * @param pin 4316 * @return 0 if ok 4317 */ 4318 int gap_pin_code_negative(bd_addr_t addr){ 4319 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4320 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4321 } 4322 4323 /** 4324 * @brief SSP Passkey Response 4325 * @param addr 4326 * @param passkey 4327 * @return 0 if ok 4328 */ 4329 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4330 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4331 hci_stack->gap_pairing_passkey = passkey; 4332 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4333 } 4334 4335 /** 4336 * @brief Abort SSP Passkey Entry/Pairing 4337 * @param addr 4338 * @param pin 4339 * @return 0 if ok 4340 */ 4341 int gap_ssp_passkey_negative(bd_addr_t addr){ 4342 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4343 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4344 } 4345 4346 /** 4347 * @brief Accept SSP Numeric Comparison 4348 * @param addr 4349 * @param passkey 4350 * @return 0 if ok 4351 */ 4352 int gap_ssp_confirmation_response(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_CONFIRMATION); 4355 } 4356 4357 /** 4358 * @brief Abort SSP Numeric Comparison/Pairing 4359 * @param addr 4360 * @param pin 4361 * @return 0 if ok 4362 */ 4363 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4364 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4365 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4366 } 4367 4368 /** 4369 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4370 * @param inquiry_mode see bluetooth_defines.h 4371 */ 4372 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4373 hci_stack->inquiry_mode = mode; 4374 } 4375 4376 /** 4377 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4378 */ 4379 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4380 hci_stack->sco_voice_setting = voice_setting; 4381 } 4382 4383 /** 4384 * @brief Get SCO Voice Setting 4385 * @return current voice setting 4386 */ 4387 uint16_t hci_get_sco_voice_setting(void){ 4388 return hci_stack->sco_voice_setting; 4389 } 4390 4391 /** @brief Get SCO packet length for current SCO Voice setting 4392 * @note Using SCO packets of the exact length is required for USB transfer 4393 * @return Length of SCO packets in bytes (not audio frames) 4394 */ 4395 int hci_get_sco_packet_length(void){ 4396 // see Core Spec for H2 USB Transfer. 4397 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4398 return 27; 4399 } 4400 #endif 4401 4402 4403 HCI_STATE hci_get_state(void){ 4404 return hci_stack->state; 4405 } 4406 4407 4408 /** 4409 * @brief Set callback for Bluetooth Hardware Error 4410 */ 4411 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4412 hci_stack->hardware_error_callback = fn; 4413 } 4414 4415 void hci_disconnect_all(void){ 4416 btstack_linked_list_iterator_t it; 4417 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4418 while (btstack_linked_list_iterator_has_next(&it)){ 4419 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4420 if (con->state == SENT_DISCONNECT) continue; 4421 con->state = SEND_DISCONNECT; 4422 } 4423 hci_run(); 4424 } 4425 4426 uint16_t hci_get_manufacturer(void){ 4427 return hci_stack->manufacturer; 4428 } 4429