1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 147 static void hci_emit_nr_connections_changed(void); 148 static void hci_emit_hci_open_failed(void); 149 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 150 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 151 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 152 static void hci_run(void); 153 static int hci_is_le_connection(hci_connection_t * connection); 154 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 155 156 #ifdef ENABLE_BLE 157 #ifdef ENABLE_LE_CENTRAL 158 // called from test/ble_client/advertising_data_parser.c 159 void le_handle_advertisement_report(uint8_t *packet, int size); 160 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 161 #endif 162 #endif 163 164 // the STACK is here 165 #ifndef HAVE_MALLOC 166 static hci_stack_t hci_stack_static; 167 #endif 168 static hci_stack_t * hci_stack = NULL; 169 170 #ifdef ENABLE_CLASSIC 171 // test helper 172 static uint8_t disable_l2cap_timeouts = 0; 173 #endif 174 175 /** 176 * create connection for given address 177 * 178 * @return connection OR NULL, if no memory left 179 */ 180 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 181 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 182 hci_connection_t * conn = btstack_memory_hci_connection_get(); 183 if (!conn) return NULL; 184 memset(conn, 0, sizeof(hci_connection_t)); 185 bd_addr_copy(conn->address, addr); 186 conn->address_type = addr_type; 187 conn->con_handle = 0xffff; 188 conn->authentication_flags = AUTH_FLAGS_NONE; 189 conn->bonding_flags = 0; 190 conn->requested_security_level = LEVEL_0; 191 #ifdef ENABLE_CLASSIC 192 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 193 btstack_run_loop_set_timer_context(&conn->timeout, conn); 194 hci_connection_timestamp(conn); 195 #endif 196 conn->acl_recombination_length = 0; 197 conn->acl_recombination_pos = 0; 198 conn->num_acl_packets_sent = 0; 199 conn->num_sco_packets_sent = 0; 200 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 201 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 202 return conn; 203 } 204 205 206 /** 207 * get le connection parameter range 208 * 209 * @return le connection parameter range struct 210 */ 211 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 212 *range = hci_stack->le_connection_parameter_range; 213 } 214 215 /** 216 * set le connection parameter range 217 * 218 */ 219 220 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 221 hci_stack->le_connection_parameter_range = *range; 222 } 223 224 /** 225 * get hci connections iterator 226 * 227 * @return hci connections iterator 228 */ 229 230 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 231 btstack_linked_list_iterator_init(it, &hci_stack->connections); 232 } 233 234 /** 235 * get connection for a given handle 236 * 237 * @return connection OR NULL, if not found 238 */ 239 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 240 btstack_linked_list_iterator_t it; 241 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 242 while (btstack_linked_list_iterator_has_next(&it)){ 243 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 244 if ( item->con_handle == con_handle ) { 245 return item; 246 } 247 } 248 return NULL; 249 } 250 251 /** 252 * get connection for given address 253 * 254 * @return connection OR NULL, if not found 255 */ 256 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 257 btstack_linked_list_iterator_t it; 258 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 259 while (btstack_linked_list_iterator_has_next(&it)){ 260 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 261 if (connection->address_type != addr_type) continue; 262 if (memcmp(addr, connection->address, 6) != 0) continue; 263 return connection; 264 } 265 return NULL; 266 } 267 268 269 #ifdef ENABLE_CLASSIC 270 271 #ifdef ENABLE_SCO_OVER_HCI 272 static int hci_number_sco_connections(void){ 273 int connections = 0; 274 btstack_linked_list_iterator_t it; 275 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 276 while (btstack_linked_list_iterator_has_next(&it)){ 277 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 278 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 279 connections++; 280 } 281 return connections; 282 } 283 #endif 284 285 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 286 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 287 #ifdef HAVE_EMBEDDED_TICK 288 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 289 // connections might be timed out 290 hci_emit_l2cap_check_timeout(connection); 291 } 292 #else 293 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 294 // connections might be timed out 295 hci_emit_l2cap_check_timeout(connection); 296 } 297 #endif 298 } 299 300 static void hci_connection_timestamp(hci_connection_t *connection){ 301 #ifdef HAVE_EMBEDDED_TICK 302 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 303 #else 304 connection->timestamp = btstack_run_loop_get_time_ms(); 305 #endif 306 } 307 308 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 309 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 310 } 311 312 313 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 314 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 315 } 316 317 /** 318 * add authentication flags and reset timer 319 * @note: assumes classic connection 320 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 321 */ 322 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 323 bd_addr_t addr; 324 reverse_bd_addr(bd_addr, addr); 325 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 326 if (conn) { 327 connectionSetAuthenticationFlags(conn, flags); 328 hci_connection_timestamp(conn); 329 } 330 } 331 332 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 333 hci_connection_t * conn = hci_connection_for_handle(handle); 334 if (!conn) return 0; 335 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 336 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 337 return 0; 338 } 339 340 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 341 if (!hci_stack->link_key_db) return; 342 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 343 hci_stack->link_key_db->delete_link_key(addr); 344 } 345 346 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 347 if (!hci_stack->link_key_db) return; 348 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 349 hci_stack->link_key_db->put_link_key(addr, link_key, type); 350 } 351 #endif 352 353 static int hci_is_le_connection(hci_connection_t * connection){ 354 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 355 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 356 } 357 358 /** 359 * count connections 360 */ 361 static int nr_hci_connections(void){ 362 int count = 0; 363 btstack_linked_item_t *it; 364 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 365 return count; 366 } 367 368 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 369 370 unsigned int num_packets_sent_classic = 0; 371 unsigned int num_packets_sent_le = 0; 372 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 377 num_packets_sent_classic += connection->num_acl_packets_sent; 378 } else { 379 num_packets_sent_le += connection->num_acl_packets_sent; 380 } 381 } 382 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 383 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 384 int free_slots_le = 0; 385 386 if (free_slots_classic < 0){ 387 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 388 return 0; 389 } 390 391 if (hci_stack->le_acl_packets_total_num){ 392 // if we have LE slots, they are used 393 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 394 if (free_slots_le < 0){ 395 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 396 return 0; 397 } 398 } else { 399 // otherwise, classic slots are used for LE, too 400 free_slots_classic -= num_packets_sent_le; 401 if (free_slots_classic < 0){ 402 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 403 return 0; 404 } 405 } 406 407 switch (address_type){ 408 case BD_ADDR_TYPE_UNKNOWN: 409 log_error("hci_number_free_acl_slots: unknown address type"); 410 return 0; 411 412 case BD_ADDR_TYPE_CLASSIC: 413 return free_slots_classic; 414 415 default: 416 if (hci_stack->le_acl_packets_total_num){ 417 return free_slots_le; 418 } 419 return free_slots_classic; 420 } 421 } 422 423 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 424 // get connection type 425 hci_connection_t * connection = hci_connection_for_handle(con_handle); 426 if (!connection){ 427 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 428 return 0; 429 } 430 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 431 } 432 433 #ifdef ENABLE_CLASSIC 434 static int hci_number_free_sco_slots(void){ 435 unsigned int num_sco_packets_sent = 0; 436 btstack_linked_item_t *it; 437 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 438 hci_connection_t * connection = (hci_connection_t *) it; 439 num_sco_packets_sent += connection->num_sco_packets_sent; 440 } 441 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 442 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 443 return 0; 444 } 445 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 446 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 447 } 448 #endif 449 450 // only used to send HCI Host Number Completed Packets 451 static int hci_can_send_comand_packet_transport(void){ 452 if (hci_stack->hci_packet_buffer_reserved) return 0; 453 454 // check for async hci transport implementations 455 if (hci_stack->hci_transport->can_send_packet_now){ 456 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 457 return 0; 458 } 459 } 460 return 1; 461 } 462 463 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 464 int hci_can_send_command_packet_now(void){ 465 if (hci_can_send_comand_packet_transport() == 0) return 0; 466 return hci_stack->num_cmd_packets > 0; 467 } 468 469 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 470 // check for async hci transport implementations 471 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 472 return hci_stack->hci_transport->can_send_packet_now(packet_type); 473 } 474 475 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 476 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 477 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 478 } 479 480 int hci_can_send_acl_le_packet_now(void){ 481 if (hci_stack->hci_packet_buffer_reserved) return 0; 482 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 483 } 484 485 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 486 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 487 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 488 } 489 490 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 491 if (hci_stack->hci_packet_buffer_reserved) return 0; 492 return hci_can_send_prepared_acl_packet_now(con_handle); 493 } 494 495 #ifdef ENABLE_CLASSIC 496 int hci_can_send_acl_classic_packet_now(void){ 497 if (hci_stack->hci_packet_buffer_reserved) return 0; 498 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 499 } 500 501 int hci_can_send_prepared_sco_packet_now(void){ 502 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 503 if (!hci_stack->synchronous_flow_control_enabled) return 1; 504 return hci_number_free_sco_slots() > 0; 505 } 506 507 int hci_can_send_sco_packet_now(void){ 508 if (hci_stack->hci_packet_buffer_reserved) return 0; 509 return hci_can_send_prepared_sco_packet_now(); 510 } 511 512 void hci_request_sco_can_send_now_event(void){ 513 hci_stack->sco_waiting_for_can_send_now = 1; 514 hci_notify_if_sco_can_send_now(); 515 } 516 #endif 517 518 // used for internal checks in l2cap.c 519 int hci_is_packet_buffer_reserved(void){ 520 return hci_stack->hci_packet_buffer_reserved; 521 } 522 523 // reserves outgoing packet buffer. @returns 1 if successful 524 int hci_reserve_packet_buffer(void){ 525 if (hci_stack->hci_packet_buffer_reserved) { 526 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 527 return 0; 528 } 529 hci_stack->hci_packet_buffer_reserved = 1; 530 return 1; 531 } 532 533 void hci_release_packet_buffer(void){ 534 hci_stack->hci_packet_buffer_reserved = 0; 535 } 536 537 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 538 static int hci_transport_synchronous(void){ 539 return hci_stack->hci_transport->can_send_packet_now == NULL; 540 } 541 542 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 543 544 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 545 546 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 547 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 548 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 549 max_acl_data_packet_length = hci_stack->le_data_packets_length; 550 } 551 552 // testing: reduce buffer to minimum 553 // max_acl_data_packet_length = 52; 554 555 log_debug("hci_send_acl_packet_fragments entered"); 556 557 int err; 558 // multiple packets could be send on a synchronous HCI transport 559 while (1){ 560 561 log_debug("hci_send_acl_packet_fragments loop entered"); 562 563 // get current data 564 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 565 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 566 int more_fragments = 0; 567 568 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 569 if (current_acl_data_packet_length > max_acl_data_packet_length){ 570 more_fragments = 1; 571 current_acl_data_packet_length = max_acl_data_packet_length; 572 } 573 574 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 575 if (acl_header_pos > 0){ 576 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 577 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 578 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 579 } 580 581 // update header len 582 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 583 584 // count packet 585 connection->num_acl_packets_sent++; 586 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 587 588 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 589 if (more_fragments){ 590 // update start of next fragment to send 591 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 592 } else { 593 // done 594 hci_stack->acl_fragmentation_pos = 0; 595 hci_stack->acl_fragmentation_total_size = 0; 596 } 597 598 // send packet 599 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 600 const int size = current_acl_data_packet_length + 4; 601 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 602 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 603 604 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 605 606 // done yet? 607 if (!more_fragments) break; 608 609 // can send more? 610 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 611 } 612 613 log_debug("hci_send_acl_packet_fragments loop over"); 614 615 // release buffer now for synchronous transport 616 if (hci_transport_synchronous()){ 617 hci_release_packet_buffer(); 618 // notify upper stack that it might be possible to send again 619 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 620 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 621 } 622 623 return err; 624 } 625 626 // pre: caller has reserved the packet buffer 627 int hci_send_acl_packet_buffer(int size){ 628 629 // log_info("hci_send_acl_packet_buffer size %u", size); 630 631 if (!hci_stack->hci_packet_buffer_reserved) { 632 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 633 return 0; 634 } 635 636 uint8_t * packet = hci_stack->hci_packet_buffer; 637 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 638 639 // check for free places on Bluetooth module 640 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 641 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 642 hci_release_packet_buffer(); 643 return BTSTACK_ACL_BUFFERS_FULL; 644 } 645 646 hci_connection_t *connection = hci_connection_for_handle( con_handle); 647 if (!connection) { 648 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 649 hci_release_packet_buffer(); 650 return 0; 651 } 652 653 #ifdef ENABLE_CLASSIC 654 hci_connection_timestamp(connection); 655 #endif 656 657 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 658 659 // setup data 660 hci_stack->acl_fragmentation_total_size = size; 661 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 662 663 return hci_send_acl_packet_fragments(connection); 664 } 665 666 #ifdef ENABLE_CLASSIC 667 // pre: caller has reserved the packet buffer 668 int hci_send_sco_packet_buffer(int size){ 669 670 // log_info("hci_send_acl_packet_buffer size %u", size); 671 672 if (!hci_stack->hci_packet_buffer_reserved) { 673 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 674 return 0; 675 } 676 677 uint8_t * packet = hci_stack->hci_packet_buffer; 678 679 // skip checks in loopback mode 680 if (!hci_stack->loopback_mode){ 681 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 682 683 // check for free places on Bluetooth module 684 if (!hci_can_send_prepared_sco_packet_now()) { 685 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 686 hci_release_packet_buffer(); 687 return BTSTACK_ACL_BUFFERS_FULL; 688 } 689 690 // track send packet in connection struct 691 hci_connection_t *connection = hci_connection_for_handle( con_handle); 692 if (!connection) { 693 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 694 hci_release_packet_buffer(); 695 return 0; 696 } 697 connection->num_sco_packets_sent++; 698 } 699 700 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 701 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 702 703 if (hci_transport_synchronous()){ 704 hci_release_packet_buffer(); 705 // notify upper stack that it might be possible to send again 706 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 707 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 708 } 709 710 return err; 711 } 712 #endif 713 714 static void acl_handler(uint8_t *packet, int size){ 715 716 // log_info("acl_handler: size %u", size); 717 718 // get info 719 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 720 hci_connection_t *conn = hci_connection_for_handle(con_handle); 721 uint8_t acl_flags = READ_ACL_FLAGS(packet); 722 uint16_t acl_length = READ_ACL_LENGTH(packet); 723 724 // ignore non-registered handle 725 if (!conn){ 726 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 727 return; 728 } 729 730 // assert packet is complete 731 if (acl_length + 4 != size){ 732 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 733 return; 734 } 735 736 #ifdef ENABLE_CLASSIC 737 // update idle timestamp 738 hci_connection_timestamp(conn); 739 #endif 740 741 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 742 hci_stack->host_completed_packets = 1; 743 conn->num_packets_completed++; 744 #endif 745 746 // handle different packet types 747 switch (acl_flags & 0x03) { 748 749 case 0x01: // continuation fragment 750 751 // sanity checks 752 if (conn->acl_recombination_pos == 0) { 753 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 754 return; 755 } 756 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 757 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 758 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 759 conn->acl_recombination_pos = 0; 760 return; 761 } 762 763 // append fragment payload (header already stored) 764 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 765 conn->acl_recombination_pos += acl_length; 766 767 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 768 // conn->acl_recombination_pos, conn->acl_recombination_length); 769 770 // forward complete L2CAP packet if complete. 771 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 772 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 773 // reset recombination buffer 774 conn->acl_recombination_length = 0; 775 conn->acl_recombination_pos = 0; 776 } 777 break; 778 779 case 0x02: { // first fragment 780 781 // sanity check 782 if (conn->acl_recombination_pos) { 783 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 784 conn->acl_recombination_pos = 0; 785 } 786 787 // peek into L2CAP packet! 788 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 789 790 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 791 792 // compare fragment size to L2CAP packet size 793 if (acl_length >= l2cap_length + 4){ 794 // forward fragment as L2CAP packet 795 hci_emit_acl_packet(packet, acl_length + 4); 796 } else { 797 798 if (acl_length > HCI_ACL_BUFFER_SIZE){ 799 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 800 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 801 return; 802 } 803 804 // store first fragment and tweak acl length for complete package 805 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 806 conn->acl_recombination_pos = acl_length + 4; 807 conn->acl_recombination_length = l2cap_length; 808 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 809 } 810 break; 811 812 } 813 default: 814 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 815 return; 816 } 817 818 // execute main loop 819 hci_run(); 820 } 821 822 static void hci_shutdown_connection(hci_connection_t *conn){ 823 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 824 825 #ifdef ENABLE_CLASSIC 826 #ifdef ENABLE_SCO_OVER_HCI 827 int addr_type = conn->address_type; 828 #endif 829 #endif 830 831 btstack_run_loop_remove_timer(&conn->timeout); 832 833 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 834 btstack_memory_hci_connection_free( conn ); 835 836 // now it's gone 837 hci_emit_nr_connections_changed(); 838 839 #ifdef ENABLE_CLASSIC 840 #ifdef ENABLE_SCO_OVER_HCI 841 // update SCO 842 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 843 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 844 } 845 #endif 846 #endif 847 } 848 849 #ifdef ENABLE_CLASSIC 850 851 static const uint16_t packet_type_sizes[] = { 852 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 853 HCI_ACL_DH1_SIZE, 0, 0, 0, 854 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 855 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 856 }; 857 static const uint8_t packet_type_feature_requirement_bit[] = { 858 0, // 3 slot packets 859 1, // 5 slot packets 860 25, // EDR 2 mpbs 861 26, // EDR 3 mbps 862 39, // 3 slot EDR packts 863 40, // 5 slot EDR packet 864 }; 865 static const uint16_t packet_type_feature_packet_mask[] = { 866 0x0f00, // 3 slot packets 867 0xf000, // 5 slot packets 868 0x1102, // EDR 2 mpbs 869 0x2204, // EDR 3 mbps 870 0x0300, // 3 slot EDR packts 871 0x3000, // 5 slot EDR packet 872 }; 873 874 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 875 // enable packet types based on size 876 uint16_t packet_types = 0; 877 unsigned int i; 878 for (i=0;i<16;i++){ 879 if (packet_type_sizes[i] == 0) continue; 880 if (packet_type_sizes[i] <= buffer_size){ 881 packet_types |= 1 << i; 882 } 883 } 884 // disable packet types due to missing local supported features 885 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 886 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 887 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 888 if (feature_set) continue; 889 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 890 packet_types &= ~packet_type_feature_packet_mask[i]; 891 } 892 // flip bits for "may not be used" 893 packet_types ^= 0x3306; 894 return packet_types; 895 } 896 897 uint16_t hci_usable_acl_packet_types(void){ 898 return hci_stack->packet_types; 899 } 900 #endif 901 902 uint8_t* hci_get_outgoing_packet_buffer(void){ 903 // hci packet buffer is >= acl data packet length 904 return hci_stack->hci_packet_buffer; 905 } 906 907 uint16_t hci_max_acl_data_packet_length(void){ 908 return hci_stack->acl_data_packet_length; 909 } 910 911 #ifdef ENABLE_CLASSIC 912 int hci_extended_sco_link_supported(void){ 913 // No. 31, byte 3, bit 7 914 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 915 } 916 #endif 917 918 int hci_non_flushable_packet_boundary_flag_supported(void){ 919 // No. 54, byte 6, bit 6 920 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 921 } 922 923 static int gap_ssp_supported(void){ 924 // No. 51, byte 6, bit 3 925 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 926 } 927 928 static int hci_classic_supported(void){ 929 #ifdef ENABLE_CLASSIC 930 // No. 37, byte 4, bit 5, = No BR/EDR Support 931 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 932 #else 933 return 0; 934 #endif 935 } 936 937 static int hci_le_supported(void){ 938 #ifdef ENABLE_BLE 939 // No. 37, byte 4, bit 6 = LE Supported (Controller) 940 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 941 #else 942 return 0; 943 #endif 944 } 945 946 #ifdef ENABLE_BLE 947 948 /** 949 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 950 */ 951 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 952 *addr_type = hci_stack->le_own_addr_type; 953 if (hci_stack->le_own_addr_type){ 954 memcpy(addr, hci_stack->le_random_address, 6); 955 } else { 956 memcpy(addr, hci_stack->local_bd_addr, 6); 957 } 958 } 959 960 #ifdef ENABLE_LE_CENTRAL 961 void le_handle_advertisement_report(uint8_t *packet, int size){ 962 963 UNUSED(size); 964 965 int offset = 3; 966 int num_reports = packet[offset]; 967 offset += 1; 968 969 int i; 970 // log_info("HCI: handle adv report with num reports: %d", num_reports); 971 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 972 for (i=0; i<num_reports;i++){ 973 uint8_t data_length = packet[offset + 8]; 974 uint8_t event_size = 10 + data_length; 975 int pos = 0; 976 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 977 event[pos++] = event_size; 978 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 979 offset += 8; 980 pos += 8; 981 event[pos++] = packet[offset + 1 + data_length]; // rssi 982 event[pos++] = packet[offset++]; //data_length; 983 memcpy(&event[pos], &packet[offset], data_length); 984 pos += data_length; 985 offset += data_length + 1; // rssi 986 hci_emit_event(event, pos, 1); 987 } 988 } 989 #endif 990 #endif 991 992 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 993 994 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 995 if (!hci_stack->config) return 0; 996 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 997 // Limit baud rate for Broadcom chipsets to 3 mbps 998 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 999 baud_rate = 3000000; 1000 } 1001 return baud_rate; 1002 } 1003 1004 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1005 UNUSED(ds); 1006 1007 switch (hci_stack->substate){ 1008 case HCI_INIT_W4_SEND_RESET: 1009 log_info("Resend HCI Reset"); 1010 hci_stack->substate = HCI_INIT_SEND_RESET; 1011 hci_stack->num_cmd_packets = 1; 1012 hci_run(); 1013 break; 1014 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1015 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1016 if (hci_stack->hci_transport->reset_link){ 1017 hci_stack->hci_transport->reset_link(); 1018 } 1019 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1020 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1021 log_info("Resend HCI Reset - CSR Warm Boot"); 1022 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1023 hci_stack->num_cmd_packets = 1; 1024 hci_run(); 1025 break; 1026 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1027 if (hci_stack->hci_transport->set_baudrate){ 1028 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1029 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1030 hci_stack->hci_transport->set_baudrate(baud_rate); 1031 } 1032 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1033 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1034 if (hci_stack->hci_transport->reset_link){ 1035 log_info("Link Reset"); 1036 hci_stack->hci_transport->reset_link(); 1037 } 1038 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1039 hci_run(); 1040 } 1041 break; 1042 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1043 // otherwise continue 1044 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1045 hci_send_cmd(&hci_read_local_supported_commands); 1046 break; 1047 default: 1048 break; 1049 } 1050 } 1051 #endif 1052 1053 static void hci_initializing_next_state(void){ 1054 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1055 } 1056 1057 // assumption: hci_can_send_command_packet_now() == true 1058 static void hci_initializing_run(void){ 1059 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1060 switch (hci_stack->substate){ 1061 case HCI_INIT_SEND_RESET: 1062 hci_state_reset(); 1063 1064 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1065 // prepare reset if command complete not received in 100ms 1066 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1067 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1068 btstack_run_loop_add_timer(&hci_stack->timeout); 1069 #endif 1070 // send command 1071 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1072 hci_send_cmd(&hci_reset); 1073 break; 1074 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1075 hci_send_cmd(&hci_read_local_version_information); 1076 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1077 break; 1078 case HCI_INIT_SEND_READ_LOCAL_NAME: 1079 hci_send_cmd(&hci_read_local_name); 1080 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1081 break; 1082 1083 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1084 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1085 hci_state_reset(); 1086 // prepare reset if command complete not received in 100ms 1087 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1088 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1089 btstack_run_loop_add_timer(&hci_stack->timeout); 1090 // send command 1091 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1092 hci_send_cmd(&hci_reset); 1093 break; 1094 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1095 hci_state_reset(); 1096 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1097 hci_send_cmd(&hci_reset); 1098 break; 1099 case HCI_INIT_SEND_BAUD_CHANGE: { 1100 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1101 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1102 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1103 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1104 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1105 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1106 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1107 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1108 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1109 btstack_run_loop_add_timer(&hci_stack->timeout); 1110 } 1111 break; 1112 } 1113 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1114 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1115 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1116 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1117 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1118 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1119 break; 1120 } 1121 case HCI_INIT_CUSTOM_INIT: 1122 // Custom initialization 1123 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1124 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1125 if (valid_cmd){ 1126 int size = 3 + hci_stack->hci_packet_buffer[2]; 1127 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1128 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1129 switch (valid_cmd) { 1130 case 1: 1131 default: 1132 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1133 break; 1134 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1135 log_info("CSR Warm Boot"); 1136 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1137 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1138 btstack_run_loop_add_timer(&hci_stack->timeout); 1139 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1140 && hci_stack->config 1141 && hci_stack->chipset 1142 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1143 && hci_stack->hci_transport->set_baudrate 1144 && hci_transport_uart_get_main_baud_rate()){ 1145 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1146 } else { 1147 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1148 } 1149 break; 1150 } 1151 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1152 break; 1153 } 1154 log_info("Init script done"); 1155 1156 // Init script download on Broadcom chipsets causes: 1157 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1158 // - baud rate to reset, restore UART baud rate if needed 1159 int need_baud_change = hci_stack->config 1160 && hci_stack->chipset 1161 && hci_stack->chipset->set_baudrate_command 1162 && hci_stack->hci_transport->set_baudrate 1163 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1164 if (need_baud_change) { 1165 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1166 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1167 hci_stack->hci_transport->set_baudrate(baud_rate); 1168 } 1169 1170 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1171 // -> Work around: wait a few milliseconds here. 1172 log_info("BCM delay after init script"); 1173 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1174 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1175 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1176 btstack_run_loop_add_timer(&hci_stack->timeout); 1177 break; 1178 } 1179 } 1180 // otherwise continue 1181 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1182 hci_send_cmd(&hci_read_local_supported_commands); 1183 break; 1184 case HCI_INIT_SET_BD_ADDR: 1185 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1186 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1187 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1188 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1189 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1190 break; 1191 #endif 1192 1193 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1194 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1195 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1196 hci_send_cmd(&hci_read_local_supported_commands); 1197 break; 1198 case HCI_INIT_READ_BD_ADDR: 1199 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1200 hci_send_cmd(&hci_read_bd_addr); 1201 break; 1202 case HCI_INIT_READ_BUFFER_SIZE: 1203 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1204 hci_send_cmd(&hci_read_buffer_size); 1205 break; 1206 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1207 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1208 hci_send_cmd(&hci_read_local_supported_features); 1209 break; 1210 1211 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1212 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1213 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1214 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1215 break; 1216 case HCI_INIT_HOST_BUFFER_SIZE: 1217 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1218 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1219 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1220 break; 1221 #endif 1222 1223 case HCI_INIT_SET_EVENT_MASK: 1224 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1225 if (hci_le_supported()){ 1226 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1227 } else { 1228 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1229 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1230 } 1231 break; 1232 1233 #ifdef ENABLE_CLASSIC 1234 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1235 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1236 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1237 break; 1238 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1239 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1240 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1241 break; 1242 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1243 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1244 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1245 break; 1246 case HCI_INIT_WRITE_LOCAL_NAME: 1247 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1248 if (hci_stack->local_name){ 1249 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1250 } else { 1251 char local_name[8+17+1]; 1252 // BTstack 11:22:33:44:55:66 1253 memcpy(local_name, "BTstack ", 8); 1254 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1255 local_name[8+17] = '\0'; 1256 log_info("---> Name %s", local_name); 1257 hci_send_cmd(&hci_write_local_name, local_name); 1258 } 1259 break; 1260 case HCI_INIT_WRITE_EIR_DATA: 1261 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1262 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1263 break; 1264 case HCI_INIT_WRITE_INQUIRY_MODE: 1265 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1266 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1267 break; 1268 case HCI_INIT_WRITE_SCAN_ENABLE: 1269 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1270 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1271 break; 1272 // only sent if ENABLE_SCO_OVER_HCI is defined 1273 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1274 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1275 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1276 break; 1277 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1278 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1279 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1280 break; 1281 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1282 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1283 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1284 log_info("BCM: Route SCO data via HCI transport"); 1285 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1286 break; 1287 1288 #endif 1289 #ifdef ENABLE_BLE 1290 // LE INIT 1291 case HCI_INIT_LE_READ_BUFFER_SIZE: 1292 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1293 hci_send_cmd(&hci_le_read_buffer_size); 1294 break; 1295 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1296 // LE Supported Host = 1, Simultaneous Host = 0 1297 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1298 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1299 break; 1300 #endif 1301 1302 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1303 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1304 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1305 hci_send_cmd(&hci_le_read_maximum_data_length); 1306 break; 1307 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1308 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1309 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1310 break; 1311 #endif 1312 1313 #ifdef ENABLE_LE_CENTRAL 1314 case HCI_INIT_READ_WHITE_LIST_SIZE: 1315 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1316 hci_send_cmd(&hci_le_read_white_list_size); 1317 break; 1318 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1319 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1320 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1321 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1322 break; 1323 #endif 1324 default: 1325 return; 1326 } 1327 } 1328 1329 static void hci_init_done(void){ 1330 // done. tell the app 1331 log_info("hci_init_done -> HCI_STATE_WORKING"); 1332 hci_stack->state = HCI_STATE_WORKING; 1333 hci_emit_state(); 1334 hci_run(); 1335 } 1336 1337 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1338 UNUSED(size); 1339 1340 uint8_t command_completed = 0; 1341 1342 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1343 uint16_t opcode = little_endian_read_16(packet,3); 1344 if (opcode == hci_stack->last_cmd_opcode){ 1345 command_completed = 1; 1346 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1347 } else { 1348 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1349 } 1350 } 1351 1352 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1353 uint8_t status = packet[2]; 1354 uint16_t opcode = little_endian_read_16(packet,4); 1355 if (opcode == hci_stack->last_cmd_opcode){ 1356 if (status){ 1357 command_completed = 1; 1358 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1359 } else { 1360 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1361 } 1362 } else { 1363 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1364 } 1365 } 1366 1367 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1368 1369 // Vendor == CSR 1370 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1371 // TODO: track actual command 1372 command_completed = 1; 1373 } 1374 1375 // Vendor == Toshiba 1376 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1377 // TODO: track actual command 1378 command_completed = 1; 1379 } 1380 1381 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1382 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1383 // 1384 // HCI Reset 1385 // Timeout 100 ms 1386 // HCI Reset 1387 // Command Complete Reset 1388 // HCI Read Local Version Information 1389 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1390 // hang... 1391 // 1392 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1393 if (!command_completed 1394 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1395 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1396 1397 uint16_t opcode = little_endian_read_16(packet,3); 1398 if (opcode == hci_reset.opcode){ 1399 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1400 return; 1401 } 1402 } 1403 1404 // CSR & H5 1405 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1406 if (!command_completed 1407 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1408 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1409 1410 uint16_t opcode = little_endian_read_16(packet,3); 1411 if (opcode == hci_reset.opcode){ 1412 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1413 return; 1414 } 1415 } 1416 1417 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1418 // fix: Correct substate and behave as command below 1419 if (command_completed){ 1420 switch (hci_stack->substate){ 1421 case HCI_INIT_SEND_RESET: 1422 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1423 break; 1424 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1425 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1426 break; 1427 default: 1428 break; 1429 } 1430 } 1431 1432 #endif 1433 1434 if (!command_completed) return; 1435 1436 int need_baud_change = 0; 1437 int need_addr_change = 0; 1438 1439 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1440 need_baud_change = hci_stack->config 1441 && hci_stack->chipset 1442 && hci_stack->chipset->set_baudrate_command 1443 && hci_stack->hci_transport->set_baudrate 1444 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1445 1446 need_addr_change = hci_stack->custom_bd_addr_set 1447 && hci_stack->chipset 1448 && hci_stack->chipset->set_bd_addr_command; 1449 #endif 1450 1451 switch(hci_stack->substate){ 1452 1453 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1454 case HCI_INIT_SEND_RESET: 1455 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1456 // fix: just correct substate and behave as command below 1457 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1458 btstack_run_loop_remove_timer(&hci_stack->timeout); 1459 break; 1460 case HCI_INIT_W4_SEND_RESET: 1461 btstack_run_loop_remove_timer(&hci_stack->timeout); 1462 break; 1463 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1464 log_info("Received local name, need baud change %d", need_baud_change); 1465 if (need_baud_change){ 1466 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1467 return; 1468 } 1469 // skip baud change 1470 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1471 return; 1472 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1473 // for STLC2500D, baud rate change already happened. 1474 // for others, baud rate gets changed now 1475 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1476 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1477 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1478 hci_stack->hci_transport->set_baudrate(baud_rate); 1479 } 1480 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1481 return; 1482 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1483 btstack_run_loop_remove_timer(&hci_stack->timeout); 1484 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1485 return; 1486 case HCI_INIT_W4_CUSTOM_INIT: 1487 // repeat custom init 1488 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1489 return; 1490 #else 1491 case HCI_INIT_W4_SEND_RESET: 1492 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1493 return ; 1494 #endif 1495 1496 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1497 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1498 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1499 return; 1500 } 1501 if (need_addr_change){ 1502 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1503 return; 1504 } 1505 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1506 return; 1507 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1508 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1509 if (need_baud_change){ 1510 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1511 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1512 hci_stack->hci_transport->set_baudrate(baud_rate); 1513 } 1514 if (need_addr_change){ 1515 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1516 return; 1517 } 1518 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1519 return; 1520 case HCI_INIT_W4_SET_BD_ADDR: 1521 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1522 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1523 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1524 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1525 return; 1526 } 1527 // skipping st warm boot 1528 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1529 return; 1530 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1531 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1532 return; 1533 #endif 1534 case HCI_INIT_W4_READ_BD_ADDR: 1535 // only read buffer size if supported 1536 if (hci_stack->local_supported_commands[0] & 0x01) { 1537 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1538 return; 1539 } 1540 // skipping read buffer size 1541 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1542 return; 1543 case HCI_INIT_W4_SET_EVENT_MASK: 1544 // skip Classic init commands for LE only chipsets 1545 if (!hci_classic_supported()){ 1546 #ifdef ENABLE_BLE 1547 if (hci_le_supported()){ 1548 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1549 return; 1550 } 1551 #endif 1552 log_error("Neither BR/EDR nor LE supported"); 1553 hci_init_done(); 1554 return; 1555 } 1556 if (!gap_ssp_supported()){ 1557 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1558 return; 1559 } 1560 break; 1561 #ifdef ENABLE_BLE 1562 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1563 // skip write le host if not supported (e.g. on LE only EM9301) 1564 if (hci_stack->local_supported_commands[0] & 0x02) break; 1565 // explicit fall through to reduce repetitions 1566 1567 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1568 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1569 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1570 hci_stack->substate = HCI_INIT_LE_READ_MAX_DATA_LENGTH; 1571 return; 1572 } 1573 // explicit fall through to reduce repetitions 1574 #endif 1575 1576 #ifdef ENABLE_LE_CENTRAL 1577 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1578 #else 1579 hci_init_done(); 1580 #endif 1581 return; 1582 #endif 1583 1584 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1585 // skip write eir data if no eir data set 1586 if (hci_stack->eir_data) break; 1587 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1588 return; 1589 1590 #ifdef ENABLE_SCO_OVER_HCI 1591 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1592 // skip write synchronous flow control if not supported 1593 if (hci_stack->local_supported_commands[0] & 0x04) break; 1594 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1595 // explicit fall through to reduce repetitions 1596 1597 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1598 // skip write default erroneous data reporting if not supported 1599 if (hci_stack->local_supported_commands[0] & 0x08) break; 1600 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1601 // explicit fall through to reduce repetitions 1602 1603 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1604 // skip bcm set sco pcm config on non-Broadcom chipsets 1605 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1606 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1607 // explicit fall through to reduce repetitions 1608 1609 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1610 if (!hci_le_supported()){ 1611 // SKIP LE init for Classic only configuration 1612 hci_init_done(); 1613 return; 1614 } 1615 break; 1616 1617 #else /* !ENABLE_SCO_OVER_HCI */ 1618 1619 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1620 #ifdef ENABLE_BLE 1621 if (hci_le_supported()){ 1622 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1623 return; 1624 } 1625 #endif 1626 // SKIP LE init for Classic only configuration 1627 hci_init_done(); 1628 return; 1629 #endif /* ENABLE_SCO_OVER_HCI */ 1630 1631 // Response to command before init done state -> init done 1632 case (HCI_INIT_DONE-1): 1633 hci_init_done(); 1634 return; 1635 1636 default: 1637 break; 1638 } 1639 hci_initializing_next_state(); 1640 } 1641 1642 static void event_handler(uint8_t *packet, int size){ 1643 1644 uint16_t event_length = packet[1]; 1645 1646 // assert packet is complete 1647 if (size != event_length + 2){ 1648 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1649 return; 1650 } 1651 1652 bd_addr_t addr; 1653 bd_addr_type_t addr_type; 1654 hci_con_handle_t handle; 1655 hci_connection_t * conn; 1656 int i; 1657 #ifdef ENABLE_CLASSIC 1658 uint8_t link_type; 1659 #endif 1660 1661 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1662 1663 switch (hci_event_packet_get_type(packet)) { 1664 1665 case HCI_EVENT_COMMAND_COMPLETE: 1666 // get num cmd packets - limit to 1 to reduce complexity 1667 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1668 1669 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1670 if (packet[5]) break; 1671 // terminate, name 248 chars 1672 packet[6+248] = 0; 1673 log_info("local name: %s", &packet[6]); 1674 } 1675 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1676 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1677 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1678 uint16_t acl_len = little_endian_read_16(packet, 6); 1679 uint16_t sco_len = packet[8]; 1680 1681 // determine usable ACL/SCO payload size 1682 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1683 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1684 1685 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1686 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1687 1688 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1689 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1690 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1691 } 1692 } 1693 #ifdef ENABLE_BLE 1694 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1695 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1696 hci_stack->le_acl_packets_total_num = packet[8]; 1697 // determine usable ACL payload size 1698 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1699 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1700 } 1701 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1702 } 1703 #endif 1704 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1705 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1706 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1707 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1708 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1709 } 1710 #endif 1711 #ifdef ENABLE_LE_CENTRAL 1712 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1713 hci_stack->le_whitelist_capacity = packet[6]; 1714 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1715 } 1716 #endif 1717 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1718 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1719 hci_stack->local_bd_addr); 1720 log_info("Local Address, Status: 0x%02x: Addr: %s", 1721 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1722 #ifdef ENABLE_CLASSIC 1723 if (hci_stack->link_key_db){ 1724 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1725 } 1726 #endif 1727 } 1728 #ifdef ENABLE_CLASSIC 1729 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1730 hci_emit_discoverable_enabled(hci_stack->discoverable); 1731 } 1732 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1733 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1734 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1735 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1736 hci_emit_event(event, sizeof(event), 1); 1737 } 1738 } 1739 #endif 1740 1741 // Note: HCI init checks 1742 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1743 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1744 1745 #ifdef ENABLE_CLASSIC 1746 // determine usable ACL packet types based on host buffer size and supported features 1747 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1748 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1749 #endif 1750 // Classic/LE 1751 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1752 } 1753 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1754 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1755 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1756 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1757 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1758 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1759 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1760 } 1761 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1762 hci_stack->local_supported_commands[0] = 1763 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1764 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1765 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1766 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1767 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1768 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1769 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1770 } 1771 #ifdef ENABLE_CLASSIC 1772 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1773 if (packet[5] == 0){ 1774 hci_stack->synchronous_flow_control_enabled = 1; 1775 } 1776 } 1777 #endif 1778 break; 1779 1780 case HCI_EVENT_COMMAND_STATUS: 1781 // get num cmd packets - limit to 1 to reduce complexity 1782 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1783 break; 1784 1785 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1786 int offset = 3; 1787 for (i=0; i<packet[2];i++){ 1788 handle = little_endian_read_16(packet, offset); 1789 offset += 2; 1790 uint16_t num_packets = little_endian_read_16(packet, offset); 1791 offset += 2; 1792 1793 conn = hci_connection_for_handle(handle); 1794 if (!conn){ 1795 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1796 continue; 1797 } 1798 1799 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1800 #ifdef ENABLE_CLASSIC 1801 if (conn->num_sco_packets_sent >= num_packets){ 1802 conn->num_sco_packets_sent -= num_packets; 1803 } else { 1804 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1805 conn->num_sco_packets_sent = 0; 1806 } 1807 hci_notify_if_sco_can_send_now(); 1808 #endif 1809 } else { 1810 if (conn->num_acl_packets_sent >= num_packets){ 1811 conn->num_acl_packets_sent -= num_packets; 1812 } else { 1813 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1814 conn->num_acl_packets_sent = 0; 1815 } 1816 } 1817 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1818 } 1819 break; 1820 } 1821 1822 #ifdef ENABLE_CLASSIC 1823 case HCI_EVENT_INQUIRY_COMPLETE: 1824 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1825 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1826 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1827 hci_emit_event(event, sizeof(event), 1); 1828 } 1829 break; 1830 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1831 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1832 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1833 } 1834 break; 1835 case HCI_EVENT_CONNECTION_REQUEST: 1836 reverse_bd_addr(&packet[2], addr); 1837 // TODO: eval COD 8-10 1838 link_type = packet[11]; 1839 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1840 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1841 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1842 if (!conn) { 1843 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1844 } 1845 if (!conn) { 1846 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1847 hci_stack->decline_reason = 0x0d; 1848 bd_addr_copy(hci_stack->decline_addr, addr); 1849 break; 1850 } 1851 conn->role = HCI_ROLE_SLAVE; 1852 conn->state = RECEIVED_CONNECTION_REQUEST; 1853 // store info about eSCO 1854 if (link_type == 0x02){ 1855 conn->remote_supported_feature_eSCO = 1; 1856 } 1857 hci_run(); 1858 break; 1859 1860 case HCI_EVENT_CONNECTION_COMPLETE: 1861 // Connection management 1862 reverse_bd_addr(&packet[5], addr); 1863 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1864 addr_type = BD_ADDR_TYPE_CLASSIC; 1865 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1866 if (conn) { 1867 if (!packet[2]){ 1868 conn->state = OPEN; 1869 conn->con_handle = little_endian_read_16(packet, 3); 1870 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1871 1872 // restart timer 1873 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1874 btstack_run_loop_add_timer(&conn->timeout); 1875 1876 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1877 1878 hci_emit_nr_connections_changed(); 1879 } else { 1880 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1881 uint8_t status = packet[2]; 1882 bd_addr_t bd_address; 1883 memcpy(&bd_address, conn->address, 6); 1884 1885 // connection failed, remove entry 1886 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1887 btstack_memory_hci_connection_free( conn ); 1888 1889 // notify client if dedicated bonding 1890 if (notify_dedicated_bonding_failed){ 1891 log_info("hci notify_dedicated_bonding_failed"); 1892 hci_emit_dedicated_bonding_result(bd_address, status); 1893 } 1894 1895 // if authentication error, also delete link key 1896 if (packet[2] == 0x05) { 1897 gap_drop_link_key_for_bd_addr(addr); 1898 } 1899 } 1900 } 1901 break; 1902 1903 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1904 reverse_bd_addr(&packet[5], addr); 1905 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1906 if (packet[2]){ 1907 // connection failed 1908 break; 1909 } 1910 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1911 if (!conn) { 1912 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1913 } 1914 if (!conn) { 1915 break; 1916 } 1917 conn->state = OPEN; 1918 conn->con_handle = little_endian_read_16(packet, 3); 1919 1920 #ifdef ENABLE_SCO_OVER_HCI 1921 // update SCO 1922 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1923 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1924 } 1925 #endif 1926 break; 1927 1928 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1929 handle = little_endian_read_16(packet, 3); 1930 conn = hci_connection_for_handle(handle); 1931 if (!conn) break; 1932 if (!packet[2]){ 1933 uint8_t * features = &packet[5]; 1934 if (features[6] & (1 << 3)){ 1935 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1936 } 1937 if (features[3] & (1<<7)){ 1938 conn->remote_supported_feature_eSCO = 1; 1939 } 1940 } 1941 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1942 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1943 if (conn->bonding_flags & BONDING_DEDICATED){ 1944 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1945 } 1946 break; 1947 1948 case HCI_EVENT_LINK_KEY_REQUEST: 1949 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1950 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1951 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1952 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1953 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1954 hci_run(); 1955 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1956 return; 1957 1958 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1959 reverse_bd_addr(&packet[2], addr); 1960 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1961 if (!conn) break; 1962 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1963 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1964 // Change Connection Encryption keeps link key type 1965 if (link_key_type != CHANGED_COMBINATION_KEY){ 1966 conn->link_key_type = link_key_type; 1967 } 1968 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1969 // still forward event to allow dismiss of pairing dialog 1970 break; 1971 } 1972 1973 case HCI_EVENT_PIN_CODE_REQUEST: 1974 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1975 // non-bondable mode: pin code negative reply will be sent 1976 if (!hci_stack->bondable){ 1977 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1978 hci_run(); 1979 return; 1980 } 1981 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1982 if (!hci_stack->link_key_db) break; 1983 hci_event_pin_code_request_get_bd_addr(packet, addr); 1984 hci_stack->link_key_db->delete_link_key(addr); 1985 break; 1986 1987 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1988 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1989 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1990 break; 1991 1992 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1993 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1994 if (!hci_stack->ssp_auto_accept) break; 1995 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1996 break; 1997 1998 case HCI_EVENT_USER_PASSKEY_REQUEST: 1999 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2000 if (!hci_stack->ssp_auto_accept) break; 2001 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2002 break; 2003 #endif 2004 2005 case HCI_EVENT_ENCRYPTION_CHANGE: 2006 handle = little_endian_read_16(packet, 3); 2007 conn = hci_connection_for_handle(handle); 2008 if (!conn) break; 2009 if (packet[2] == 0) { 2010 if (packet[5]){ 2011 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2012 } else { 2013 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2014 } 2015 } 2016 #ifdef ENABLE_CLASSIC 2017 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2018 #endif 2019 break; 2020 2021 #ifdef ENABLE_CLASSIC 2022 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2023 handle = little_endian_read_16(packet, 3); 2024 conn = hci_connection_for_handle(handle); 2025 if (!conn) break; 2026 2027 // dedicated bonding: send result and disconnect 2028 if (conn->bonding_flags & BONDING_DEDICATED){ 2029 conn->bonding_flags &= ~BONDING_DEDICATED; 2030 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2031 conn->bonding_status = packet[2]; 2032 break; 2033 } 2034 2035 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2036 // link key sufficient for requested security 2037 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2038 break; 2039 } 2040 // not enough 2041 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2042 break; 2043 #endif 2044 2045 // HCI_EVENT_DISCONNECTION_COMPLETE 2046 // has been split, to first notify stack before shutting connection down 2047 // see end of function, too. 2048 case HCI_EVENT_DISCONNECTION_COMPLETE: 2049 if (packet[2]) break; // status != 0 2050 handle = little_endian_read_16(packet, 3); 2051 // drop outgoing ACL fragments if it is for closed connection 2052 if (hci_stack->acl_fragmentation_total_size > 0) { 2053 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2054 log_info("hci: drop fragmented ACL data for closed connection"); 2055 hci_stack->acl_fragmentation_total_size = 0; 2056 hci_stack->acl_fragmentation_pos = 0; 2057 } 2058 } 2059 2060 // re-enable advertisements for le connections if active 2061 conn = hci_connection_for_handle(handle); 2062 if (!conn) break; 2063 #ifdef ENABLE_BLE 2064 #ifdef ENABLE_LE_PERIPHERAL 2065 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2066 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2067 } 2068 #endif 2069 #endif 2070 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2071 break; 2072 2073 case HCI_EVENT_HARDWARE_ERROR: 2074 log_error("Hardware Error: 0x%02x", packet[2]); 2075 if (hci_stack->hardware_error_callback){ 2076 (*hci_stack->hardware_error_callback)(packet[2]); 2077 } else { 2078 // if no special requests, just reboot stack 2079 hci_power_control_off(); 2080 hci_power_control_on(); 2081 } 2082 break; 2083 2084 #ifdef ENABLE_CLASSIC 2085 case HCI_EVENT_ROLE_CHANGE: 2086 if (packet[2]) break; // status != 0 2087 handle = little_endian_read_16(packet, 3); 2088 conn = hci_connection_for_handle(handle); 2089 if (!conn) break; // no conn 2090 conn->role = packet[9]; 2091 break; 2092 #endif 2093 2094 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2095 // release packet buffer only for asynchronous transport and if there are not further fragements 2096 if (hci_transport_synchronous()) { 2097 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2098 return; // instead of break: to avoid re-entering hci_run() 2099 } 2100 if (hci_stack->acl_fragmentation_total_size) break; 2101 hci_release_packet_buffer(); 2102 2103 // L2CAP receives this event via the hci_emit_event below 2104 2105 #ifdef ENABLE_CLASSIC 2106 // For SCO, we do the can_send_now_check here 2107 hci_notify_if_sco_can_send_now(); 2108 #endif 2109 break; 2110 2111 #ifdef ENABLE_CLASSIC 2112 case HCI_EVENT_SCO_CAN_SEND_NOW: 2113 // For SCO, we do the can_send_now_check here 2114 hci_notify_if_sco_can_send_now(); 2115 return; 2116 2117 // explode inquriy results for easier consumption 2118 case HCI_EVENT_INQUIRY_RESULT: 2119 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2120 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2121 gap_inquiry_explode(packet); 2122 break; 2123 #endif 2124 2125 #ifdef ENABLE_BLE 2126 case HCI_EVENT_LE_META: 2127 switch (packet[2]){ 2128 #ifdef ENABLE_LE_CENTRAL 2129 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2130 // log_info("advertising report received"); 2131 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2132 le_handle_advertisement_report(packet, size); 2133 break; 2134 #endif 2135 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2136 // Connection management 2137 reverse_bd_addr(&packet[8], addr); 2138 addr_type = (bd_addr_type_t)packet[7]; 2139 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2140 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2141 #ifdef ENABLE_LE_CENTRAL 2142 // if auto-connect, remove from whitelist in both roles 2143 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2144 hci_remove_from_whitelist(addr_type, addr); 2145 } 2146 // handle error: error is reported only to the initiator -> outgoing connection 2147 if (packet[3]){ 2148 // outgoing connection establishment is done 2149 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2150 // remove entry 2151 if (conn){ 2152 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2153 btstack_memory_hci_connection_free( conn ); 2154 } 2155 break; 2156 } 2157 #endif 2158 // on success, both hosts receive connection complete event 2159 if (packet[6] == HCI_ROLE_MASTER){ 2160 #ifdef ENABLE_LE_CENTRAL 2161 // if we're master, it was an outgoing connection and we're done with it 2162 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2163 #endif 2164 } else { 2165 #ifdef ENABLE_LE_PERIPHERAL 2166 // if we're slave, it was an incoming connection, advertisements have stopped 2167 hci_stack->le_advertisements_active = 0; 2168 // try to re-enable them 2169 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2170 #endif 2171 } 2172 // LE connections are auto-accepted, so just create a connection if there isn't one already 2173 if (!conn){ 2174 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2175 } 2176 // no memory, sorry. 2177 if (!conn){ 2178 break; 2179 } 2180 2181 conn->state = OPEN; 2182 conn->role = packet[6]; 2183 conn->con_handle = little_endian_read_16(packet, 4); 2184 2185 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2186 2187 // restart timer 2188 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2189 // btstack_run_loop_add_timer(&conn->timeout); 2190 2191 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2192 2193 hci_emit_nr_connections_changed(); 2194 break; 2195 2196 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2197 2198 default: 2199 break; 2200 } 2201 break; 2202 #endif 2203 default: 2204 break; 2205 } 2206 2207 // handle BT initialization 2208 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2209 hci_initializing_event_handler(packet, size); 2210 } 2211 2212 // help with BT sleep 2213 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2214 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2215 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2216 hci_initializing_next_state(); 2217 } 2218 2219 // notify upper stack 2220 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2221 2222 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2223 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2224 if (!packet[2]){ 2225 handle = little_endian_read_16(packet, 3); 2226 hci_connection_t * aConn = hci_connection_for_handle(handle); 2227 if (aConn) { 2228 uint8_t status = aConn->bonding_status; 2229 uint16_t flags = aConn->bonding_flags; 2230 bd_addr_t bd_address; 2231 memcpy(&bd_address, aConn->address, 6); 2232 hci_shutdown_connection(aConn); 2233 // connection struct is gone, don't access anymore 2234 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2235 hci_emit_dedicated_bonding_result(bd_address, status); 2236 } 2237 } 2238 } 2239 } 2240 2241 // execute main loop 2242 hci_run(); 2243 } 2244 2245 #ifdef ENABLE_CLASSIC 2246 static void sco_handler(uint8_t * packet, uint16_t size){ 2247 if (!hci_stack->sco_packet_handler) return; 2248 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2249 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2250 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2251 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2252 if (conn){ 2253 conn->num_packets_completed++; 2254 hci_stack->host_completed_packets = 1; 2255 hci_run(); 2256 } 2257 #endif 2258 } 2259 #endif 2260 2261 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2262 hci_dump_packet(packet_type, 1, packet, size); 2263 switch (packet_type) { 2264 case HCI_EVENT_PACKET: 2265 event_handler(packet, size); 2266 break; 2267 case HCI_ACL_DATA_PACKET: 2268 acl_handler(packet, size); 2269 break; 2270 #ifdef ENABLE_CLASSIC 2271 case HCI_SCO_DATA_PACKET: 2272 sco_handler(packet, size); 2273 break; 2274 #endif 2275 default: 2276 break; 2277 } 2278 } 2279 2280 /** 2281 * @brief Add event packet handler. 2282 */ 2283 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2284 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2285 } 2286 2287 2288 /** Register HCI packet handlers */ 2289 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2290 hci_stack->acl_packet_handler = handler; 2291 } 2292 2293 #ifdef ENABLE_CLASSIC 2294 /** 2295 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2296 */ 2297 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2298 hci_stack->sco_packet_handler = handler; 2299 } 2300 #endif 2301 2302 static void hci_state_reset(void){ 2303 // no connections yet 2304 hci_stack->connections = NULL; 2305 2306 // keep discoverable/connectable as this has been requested by the client(s) 2307 // hci_stack->discoverable = 0; 2308 // hci_stack->connectable = 0; 2309 // hci_stack->bondable = 1; 2310 // hci_stack->own_addr_type = 0; 2311 2312 // buffer is free 2313 hci_stack->hci_packet_buffer_reserved = 0; 2314 2315 // no pending cmds 2316 hci_stack->decline_reason = 0; 2317 hci_stack->new_scan_enable_value = 0xff; 2318 2319 // LE 2320 #ifdef ENABLE_BLE 2321 memset(hci_stack->le_random_address, 0, 6); 2322 hci_stack->le_random_address_set = 0; 2323 #endif 2324 #ifdef ENABLE_LE_CENTRAL 2325 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2326 hci_stack->le_scan_type = 0xff; 2327 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2328 hci_stack->le_whitelist = 0; 2329 hci_stack->le_whitelist_capacity = 0; 2330 2331 // connection parameter to use for outgoing connections 2332 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2333 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2334 hci_stack->le_connection_latency = 4; // 4 2335 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2336 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2337 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2338 #endif 2339 2340 // connection parameter range used to answer connection parameter update requests in l2cap 2341 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2342 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2343 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2344 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2345 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2346 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2347 } 2348 2349 #ifdef ENABLE_CLASSIC 2350 /** 2351 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2352 */ 2353 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2354 // store and open remote device db 2355 hci_stack->link_key_db = link_key_db; 2356 if (hci_stack->link_key_db) { 2357 hci_stack->link_key_db->open(); 2358 } 2359 } 2360 #endif 2361 2362 void hci_init(const hci_transport_t *transport, const void *config){ 2363 2364 #ifdef HAVE_MALLOC 2365 if (!hci_stack) { 2366 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2367 } 2368 #else 2369 hci_stack = &hci_stack_static; 2370 #endif 2371 memset(hci_stack, 0, sizeof(hci_stack_t)); 2372 2373 // reference to use transport layer implementation 2374 hci_stack->hci_transport = transport; 2375 2376 // reference to used config 2377 hci_stack->config = config; 2378 2379 // setup pointer for outgoing packet buffer 2380 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2381 2382 // max acl payload size defined in config.h 2383 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2384 2385 // register packet handlers with transport 2386 transport->register_packet_handler(&packet_handler); 2387 2388 hci_stack->state = HCI_STATE_OFF; 2389 2390 // class of device 2391 hci_stack->class_of_device = 0x007a020c; // Smartphone 2392 2393 // bondable by default 2394 hci_stack->bondable = 1; 2395 2396 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2397 hci_stack->ssp_enable = 1; 2398 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2399 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2400 hci_stack->ssp_auto_accept = 1; 2401 2402 // voice setting - signed 16 bit pcm data with CVSD over the air 2403 hci_stack->sco_voice_setting = 0x60; 2404 2405 hci_state_reset(); 2406 } 2407 2408 /** 2409 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2410 */ 2411 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2412 hci_stack->chipset = chipset_driver; 2413 2414 // reset chipset driver - init is also called on power_up 2415 if (hci_stack->chipset && hci_stack->chipset->init){ 2416 hci_stack->chipset->init(hci_stack->config); 2417 } 2418 } 2419 2420 /** 2421 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2422 */ 2423 void hci_set_control(const btstack_control_t *hardware_control){ 2424 // references to used control implementation 2425 hci_stack->control = hardware_control; 2426 // init with transport config 2427 hardware_control->init(hci_stack->config); 2428 } 2429 2430 void hci_close(void){ 2431 // close remote device db 2432 if (hci_stack->link_key_db) { 2433 hci_stack->link_key_db->close(); 2434 } 2435 2436 btstack_linked_list_iterator_t lit; 2437 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2438 while (btstack_linked_list_iterator_has_next(&lit)){ 2439 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2440 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2441 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2442 hci_shutdown_connection(connection); 2443 } 2444 2445 hci_power_control(HCI_POWER_OFF); 2446 2447 #ifdef HAVE_MALLOC 2448 free(hci_stack); 2449 #endif 2450 hci_stack = NULL; 2451 } 2452 2453 #ifdef ENABLE_CLASSIC 2454 void gap_set_class_of_device(uint32_t class_of_device){ 2455 hci_stack->class_of_device = class_of_device; 2456 } 2457 2458 void hci_disable_l2cap_timeout_check(void){ 2459 disable_l2cap_timeouts = 1; 2460 } 2461 #endif 2462 2463 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2464 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2465 void hci_set_bd_addr(bd_addr_t addr){ 2466 memcpy(hci_stack->custom_bd_addr, addr, 6); 2467 hci_stack->custom_bd_addr_set = 1; 2468 } 2469 #endif 2470 2471 // State-Module-Driver overview 2472 // state module low-level 2473 // HCI_STATE_OFF off close 2474 // HCI_STATE_INITIALIZING, on open 2475 // HCI_STATE_WORKING, on open 2476 // HCI_STATE_HALTING, on open 2477 // HCI_STATE_SLEEPING, off/sleep close 2478 // HCI_STATE_FALLING_ASLEEP on open 2479 2480 static int hci_power_control_on(void){ 2481 2482 // power on 2483 int err = 0; 2484 if (hci_stack->control && hci_stack->control->on){ 2485 err = (*hci_stack->control->on)(); 2486 } 2487 if (err){ 2488 log_error( "POWER_ON failed"); 2489 hci_emit_hci_open_failed(); 2490 return err; 2491 } 2492 2493 // int chipset driver 2494 if (hci_stack->chipset && hci_stack->chipset->init){ 2495 hci_stack->chipset->init(hci_stack->config); 2496 } 2497 2498 // init transport 2499 if (hci_stack->hci_transport->init){ 2500 hci_stack->hci_transport->init(hci_stack->config); 2501 } 2502 2503 // open transport 2504 err = hci_stack->hci_transport->open(); 2505 if (err){ 2506 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2507 if (hci_stack->control && hci_stack->control->off){ 2508 (*hci_stack->control->off)(); 2509 } 2510 hci_emit_hci_open_failed(); 2511 return err; 2512 } 2513 return 0; 2514 } 2515 2516 static void hci_power_control_off(void){ 2517 2518 log_info("hci_power_control_off"); 2519 2520 // close low-level device 2521 hci_stack->hci_transport->close(); 2522 2523 log_info("hci_power_control_off - hci_transport closed"); 2524 2525 // power off 2526 if (hci_stack->control && hci_stack->control->off){ 2527 (*hci_stack->control->off)(); 2528 } 2529 2530 log_info("hci_power_control_off - control closed"); 2531 2532 hci_stack->state = HCI_STATE_OFF; 2533 } 2534 2535 static void hci_power_control_sleep(void){ 2536 2537 log_info("hci_power_control_sleep"); 2538 2539 #if 0 2540 // don't close serial port during sleep 2541 2542 // close low-level device 2543 hci_stack->hci_transport->close(hci_stack->config); 2544 #endif 2545 2546 // sleep mode 2547 if (hci_stack->control && hci_stack->control->sleep){ 2548 (*hci_stack->control->sleep)(); 2549 } 2550 2551 hci_stack->state = HCI_STATE_SLEEPING; 2552 } 2553 2554 static int hci_power_control_wake(void){ 2555 2556 log_info("hci_power_control_wake"); 2557 2558 // wake on 2559 if (hci_stack->control && hci_stack->control->wake){ 2560 (*hci_stack->control->wake)(); 2561 } 2562 2563 #if 0 2564 // open low-level device 2565 int err = hci_stack->hci_transport->open(hci_stack->config); 2566 if (err){ 2567 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2568 if (hci_stack->control && hci_stack->control->off){ 2569 (*hci_stack->control->off)(); 2570 } 2571 hci_emit_hci_open_failed(); 2572 return err; 2573 } 2574 #endif 2575 2576 return 0; 2577 } 2578 2579 static void hci_power_transition_to_initializing(void){ 2580 // set up state machine 2581 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2582 hci_stack->hci_packet_buffer_reserved = 0; 2583 hci_stack->state = HCI_STATE_INITIALIZING; 2584 hci_stack->substate = HCI_INIT_SEND_RESET; 2585 } 2586 2587 int hci_power_control(HCI_POWER_MODE power_mode){ 2588 2589 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2590 2591 int err = 0; 2592 switch (hci_stack->state){ 2593 2594 case HCI_STATE_OFF: 2595 switch (power_mode){ 2596 case HCI_POWER_ON: 2597 err = hci_power_control_on(); 2598 if (err) { 2599 log_error("hci_power_control_on() error %d", err); 2600 return err; 2601 } 2602 hci_power_transition_to_initializing(); 2603 break; 2604 case HCI_POWER_OFF: 2605 // do nothing 2606 break; 2607 case HCI_POWER_SLEEP: 2608 // do nothing (with SLEEP == OFF) 2609 break; 2610 } 2611 break; 2612 2613 case HCI_STATE_INITIALIZING: 2614 switch (power_mode){ 2615 case HCI_POWER_ON: 2616 // do nothing 2617 break; 2618 case HCI_POWER_OFF: 2619 // no connections yet, just turn it off 2620 hci_power_control_off(); 2621 break; 2622 case HCI_POWER_SLEEP: 2623 // no connections yet, just turn it off 2624 hci_power_control_sleep(); 2625 break; 2626 } 2627 break; 2628 2629 case HCI_STATE_WORKING: 2630 switch (power_mode){ 2631 case HCI_POWER_ON: 2632 // do nothing 2633 break; 2634 case HCI_POWER_OFF: 2635 // see hci_run 2636 hci_stack->state = HCI_STATE_HALTING; 2637 break; 2638 case HCI_POWER_SLEEP: 2639 // see hci_run 2640 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2641 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2642 break; 2643 } 2644 break; 2645 2646 case HCI_STATE_HALTING: 2647 switch (power_mode){ 2648 case HCI_POWER_ON: 2649 hci_power_transition_to_initializing(); 2650 break; 2651 case HCI_POWER_OFF: 2652 // do nothing 2653 break; 2654 case HCI_POWER_SLEEP: 2655 // see hci_run 2656 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2657 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2658 break; 2659 } 2660 break; 2661 2662 case HCI_STATE_FALLING_ASLEEP: 2663 switch (power_mode){ 2664 case HCI_POWER_ON: 2665 2666 #ifdef HAVE_PLATFORM_IPHONE_OS 2667 // nothing to do, if H4 supports power management 2668 if (btstack_control_iphone_power_management_enabled()){ 2669 hci_stack->state = HCI_STATE_INITIALIZING; 2670 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2671 break; 2672 } 2673 #endif 2674 hci_power_transition_to_initializing(); 2675 break; 2676 case HCI_POWER_OFF: 2677 // see hci_run 2678 hci_stack->state = HCI_STATE_HALTING; 2679 break; 2680 case HCI_POWER_SLEEP: 2681 // do nothing 2682 break; 2683 } 2684 break; 2685 2686 case HCI_STATE_SLEEPING: 2687 switch (power_mode){ 2688 case HCI_POWER_ON: 2689 2690 #ifdef HAVE_PLATFORM_IPHONE_OS 2691 // nothing to do, if H4 supports power management 2692 if (btstack_control_iphone_power_management_enabled()){ 2693 hci_stack->state = HCI_STATE_INITIALIZING; 2694 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2695 hci_update_scan_enable(); 2696 break; 2697 } 2698 #endif 2699 err = hci_power_control_wake(); 2700 if (err) return err; 2701 hci_power_transition_to_initializing(); 2702 break; 2703 case HCI_POWER_OFF: 2704 hci_stack->state = HCI_STATE_HALTING; 2705 break; 2706 case HCI_POWER_SLEEP: 2707 // do nothing 2708 break; 2709 } 2710 break; 2711 } 2712 2713 // create internal event 2714 hci_emit_state(); 2715 2716 // trigger next/first action 2717 hci_run(); 2718 2719 return 0; 2720 } 2721 2722 2723 #ifdef ENABLE_CLASSIC 2724 2725 static void hci_update_scan_enable(void){ 2726 // 2 = page scan, 1 = inq scan 2727 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2728 hci_run(); 2729 } 2730 2731 void gap_discoverable_control(uint8_t enable){ 2732 if (enable) enable = 1; // normalize argument 2733 2734 if (hci_stack->discoverable == enable){ 2735 hci_emit_discoverable_enabled(hci_stack->discoverable); 2736 return; 2737 } 2738 2739 hci_stack->discoverable = enable; 2740 hci_update_scan_enable(); 2741 } 2742 2743 void gap_connectable_control(uint8_t enable){ 2744 if (enable) enable = 1; // normalize argument 2745 2746 // don't emit event 2747 if (hci_stack->connectable == enable) return; 2748 2749 hci_stack->connectable = enable; 2750 hci_update_scan_enable(); 2751 } 2752 #endif 2753 2754 void gap_local_bd_addr(bd_addr_t address_buffer){ 2755 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2756 } 2757 2758 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2759 static void hci_host_num_completed_packets(void){ 2760 2761 // create packet manually as arrays are not supported and num_commands should not get reduced 2762 hci_reserve_packet_buffer(); 2763 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2764 2765 uint16_t size = 0; 2766 uint16_t num_handles = 0; 2767 packet[size++] = 0x35; 2768 packet[size++] = 0x0c; 2769 size++; // skip param len 2770 size++; // skip num handles 2771 2772 // add { handle, packets } entries 2773 btstack_linked_item_t * it; 2774 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2775 hci_connection_t * connection = (hci_connection_t *) it; 2776 if (connection->num_packets_completed){ 2777 little_endian_store_16(packet, size, connection->con_handle); 2778 size += 2; 2779 little_endian_store_16(packet, size, connection->num_packets_completed); 2780 size += 2; 2781 // 2782 num_handles++; 2783 connection->num_packets_completed = 0; 2784 } 2785 } 2786 2787 packet[2] = size - 3; 2788 packet[3] = num_handles; 2789 2790 hci_stack->host_completed_packets = 0; 2791 2792 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2793 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2794 2795 // release packet buffer for synchronous transport implementations 2796 if (hci_transport_synchronous()){ 2797 hci_stack->hci_packet_buffer_reserved = 0; 2798 } 2799 } 2800 #endif 2801 2802 static void hci_run(void){ 2803 2804 // log_info("hci_run: entered"); 2805 btstack_linked_item_t * it; 2806 2807 // send continuation fragments first, as they block the prepared packet buffer 2808 if (hci_stack->acl_fragmentation_total_size > 0) { 2809 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2810 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2811 if (connection) { 2812 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2813 hci_send_acl_packet_fragments(connection); 2814 return; 2815 } 2816 } else { 2817 // connection gone -> discard further fragments 2818 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2819 hci_stack->acl_fragmentation_total_size = 0; 2820 hci_stack->acl_fragmentation_pos = 0; 2821 } 2822 } 2823 2824 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2825 // send host num completed packets next as they don't require num_cmd_packets > 0 2826 if (!hci_can_send_comand_packet_transport()) return; 2827 if (hci_stack->host_completed_packets){ 2828 hci_host_num_completed_packets(); 2829 return; 2830 } 2831 #endif 2832 2833 if (!hci_can_send_command_packet_now()) return; 2834 2835 // global/non-connection oriented commands 2836 2837 #ifdef ENABLE_CLASSIC 2838 // decline incoming connections 2839 if (hci_stack->decline_reason){ 2840 uint8_t reason = hci_stack->decline_reason; 2841 hci_stack->decline_reason = 0; 2842 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2843 return; 2844 } 2845 // send scan enable 2846 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2847 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2848 hci_stack->new_scan_enable_value = 0xff; 2849 return; 2850 } 2851 // start/stop inquiry 2852 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2853 uint8_t duration = hci_stack->inquiry_state; 2854 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2855 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2856 return; 2857 } 2858 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2859 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2860 hci_send_cmd(&hci_inquiry_cancel); 2861 return; 2862 } 2863 // remote name request 2864 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2865 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2866 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2867 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2868 return; 2869 } 2870 // pairing 2871 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2872 uint8_t state = hci_stack->gap_pairing_state; 2873 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2874 switch (state){ 2875 case GAP_PAIRING_STATE_SEND_PIN: 2876 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2877 break; 2878 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2879 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2880 break; 2881 case GAP_PAIRING_STATE_SEND_PASSKEY: 2882 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2883 break; 2884 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2885 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2886 break; 2887 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2888 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2889 break; 2890 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2891 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2892 break; 2893 default: 2894 break; 2895 } 2896 return; 2897 } 2898 #endif 2899 2900 #ifdef ENABLE_BLE 2901 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2902 if ((hci_stack->state == HCI_STATE_WORKING) 2903 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2904 2905 #ifdef ENABLE_LE_CENTRAL 2906 // handle le scan 2907 switch(hci_stack->le_scanning_state){ 2908 case LE_START_SCAN: 2909 hci_stack->le_scanning_state = LE_SCANNING; 2910 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2911 return; 2912 2913 case LE_STOP_SCAN: 2914 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2915 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2916 return; 2917 default: 2918 break; 2919 } 2920 if (hci_stack->le_scan_type != 0xff){ 2921 // defaults: active scanning, accept all advertisement packets 2922 int scan_type = hci_stack->le_scan_type; 2923 hci_stack->le_scan_type = 0xff; 2924 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); 2925 return; 2926 } 2927 #endif 2928 #ifdef ENABLE_LE_PERIPHERAL 2929 // le advertisement control 2930 if (hci_stack->le_advertisements_todo){ 2931 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2932 } 2933 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2934 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2935 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2936 return; 2937 } 2938 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2939 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2940 hci_send_cmd(&hci_le_set_advertising_parameters, 2941 hci_stack->le_advertisements_interval_min, 2942 hci_stack->le_advertisements_interval_max, 2943 hci_stack->le_advertisements_type, 2944 hci_stack->le_own_addr_type, 2945 hci_stack->le_advertisements_direct_address_type, 2946 hci_stack->le_advertisements_direct_address, 2947 hci_stack->le_advertisements_channel_map, 2948 hci_stack->le_advertisements_filter_policy); 2949 return; 2950 } 2951 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2952 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2953 uint8_t adv_data_clean[31]; 2954 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 2955 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 2956 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 2957 return; 2958 } 2959 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2960 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2961 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2962 hci_stack->le_scan_response_data); 2963 return; 2964 } 2965 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2966 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2967 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2968 return; 2969 } 2970 #endif 2971 2972 #ifdef ENABLE_LE_CENTRAL 2973 // 2974 // LE Whitelist Management 2975 // 2976 2977 // check if whitelist needs modification 2978 btstack_linked_list_iterator_t lit; 2979 int modification_pending = 0; 2980 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2981 while (btstack_linked_list_iterator_has_next(&lit)){ 2982 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2983 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2984 modification_pending = 1; 2985 break; 2986 } 2987 } 2988 2989 if (modification_pending){ 2990 // stop connnecting if modification pending 2991 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2992 hci_send_cmd(&hci_le_create_connection_cancel); 2993 return; 2994 } 2995 2996 // add/remove entries 2997 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2998 while (btstack_linked_list_iterator_has_next(&lit)){ 2999 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3000 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3001 entry->state = LE_WHITELIST_ON_CONTROLLER; 3002 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3003 return; 3004 3005 } 3006 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3007 bd_addr_t address; 3008 bd_addr_type_t address_type = entry->address_type; 3009 memcpy(address, entry->address, 6); 3010 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3011 btstack_memory_whitelist_entry_free(entry); 3012 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3013 return; 3014 } 3015 } 3016 } 3017 3018 // start connecting 3019 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3020 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3021 bd_addr_t null_addr; 3022 memset(null_addr, 0, 6); 3023 hci_send_cmd(&hci_le_create_connection, 3024 0x0060, // scan interval: 60 ms 3025 0x0030, // scan interval: 30 ms 3026 1, // use whitelist 3027 0, // peer address type 3028 null_addr, // peer bd addr 3029 hci_stack->le_own_addr_type, // our addr type: 3030 hci_stack->le_connection_interval_min, // conn interval min 3031 hci_stack->le_connection_interval_max, // conn interval max 3032 hci_stack->le_connection_latency, // conn latency 3033 hci_stack->le_supervision_timeout, // conn latency 3034 hci_stack->le_minimum_ce_length, // min ce length 3035 hci_stack->le_maximum_ce_length // max ce length 3036 ); 3037 return; 3038 } 3039 #endif 3040 } 3041 #endif 3042 3043 // send pending HCI commands 3044 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3045 hci_connection_t * connection = (hci_connection_t *) it; 3046 3047 switch(connection->state){ 3048 case SEND_CREATE_CONNECTION: 3049 switch(connection->address_type){ 3050 #ifdef ENABLE_CLASSIC 3051 case BD_ADDR_TYPE_CLASSIC: 3052 log_info("sending hci_create_connection"); 3053 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3054 break; 3055 #endif 3056 default: 3057 #ifdef ENABLE_BLE 3058 #ifdef ENABLE_LE_CENTRAL 3059 log_info("sending hci_le_create_connection"); 3060 hci_send_cmd(&hci_le_create_connection, 3061 0x0060, // scan interval: 60 ms 3062 0x0030, // scan interval: 30 ms 3063 0, // don't use whitelist 3064 connection->address_type, // peer address type 3065 connection->address, // peer bd addr 3066 hci_stack->le_own_addr_type, // our addr type: 3067 hci_stack->le_connection_interval_min, // conn interval min 3068 hci_stack->le_connection_interval_max, // conn interval max 3069 hci_stack->le_connection_latency, // conn latency 3070 hci_stack->le_supervision_timeout, // conn latency 3071 hci_stack->le_minimum_ce_length, // min ce length 3072 hci_stack->le_maximum_ce_length // max ce length 3073 ); 3074 connection->state = SENT_CREATE_CONNECTION; 3075 #endif 3076 #endif 3077 break; 3078 } 3079 return; 3080 3081 #ifdef ENABLE_CLASSIC 3082 case RECEIVED_CONNECTION_REQUEST: 3083 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3084 connection->state = ACCEPTED_CONNECTION_REQUEST; 3085 connection->role = HCI_ROLE_SLAVE; 3086 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3087 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3088 } 3089 return; 3090 #endif 3091 3092 #ifdef ENABLE_BLE 3093 #ifdef ENABLE_LE_CENTRAL 3094 case SEND_CANCEL_CONNECTION: 3095 connection->state = SENT_CANCEL_CONNECTION; 3096 hci_send_cmd(&hci_le_create_connection_cancel); 3097 return; 3098 #endif 3099 #endif 3100 case SEND_DISCONNECT: 3101 connection->state = SENT_DISCONNECT; 3102 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3103 return; 3104 3105 default: 3106 break; 3107 } 3108 3109 #ifdef ENABLE_CLASSIC 3110 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3111 log_info("responding to link key request"); 3112 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3113 link_key_t link_key; 3114 link_key_type_t link_key_type; 3115 if ( hci_stack->link_key_db 3116 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3117 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3118 connection->link_key_type = link_key_type; 3119 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3120 } else { 3121 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3122 } 3123 return; 3124 } 3125 3126 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3127 log_info("denying to pin request"); 3128 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3129 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3130 return; 3131 } 3132 3133 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3134 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3135 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3136 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3137 // tweak authentication requirements 3138 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3139 if (connection->bonding_flags & BONDING_DEDICATED){ 3140 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3141 } 3142 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3143 authreq |= 1; 3144 } 3145 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3146 } else { 3147 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3148 } 3149 return; 3150 } 3151 3152 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3153 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3154 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3155 return; 3156 } 3157 3158 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3159 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3160 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3161 return; 3162 } 3163 3164 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3165 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3166 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3167 return; 3168 } 3169 3170 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3171 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3172 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3173 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3174 return; 3175 } 3176 3177 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3178 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3179 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3180 return; 3181 } 3182 3183 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3184 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3185 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3186 return; 3187 } 3188 #endif 3189 3190 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3191 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3192 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3193 return; 3194 } 3195 3196 #ifdef ENABLE_BLE 3197 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3198 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3199 3200 uint16_t connection_interval_min = connection->le_conn_interval_min; 3201 connection->le_conn_interval_min = 0; 3202 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3203 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3204 0x0000, 0xffff); 3205 } 3206 #endif 3207 } 3208 3209 hci_connection_t * connection; 3210 switch (hci_stack->state){ 3211 case HCI_STATE_INITIALIZING: 3212 hci_initializing_run(); 3213 break; 3214 3215 case HCI_STATE_HALTING: 3216 3217 log_info("HCI_STATE_HALTING"); 3218 3219 // free whitelist entries 3220 #ifdef ENABLE_BLE 3221 #ifdef ENABLE_LE_CENTRAL 3222 { 3223 btstack_linked_list_iterator_t lit; 3224 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3225 while (btstack_linked_list_iterator_has_next(&lit)){ 3226 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3227 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3228 btstack_memory_whitelist_entry_free(entry); 3229 } 3230 } 3231 #endif 3232 #endif 3233 // close all open connections 3234 connection = (hci_connection_t *) hci_stack->connections; 3235 if (connection){ 3236 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3237 if (!hci_can_send_command_packet_now()) return; 3238 3239 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3240 3241 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3242 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3243 3244 // ... which would be ignored anyway as we shutdown (free) the connection now 3245 hci_shutdown_connection(connection); 3246 3247 // finally, send the disconnect command 3248 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3249 return; 3250 } 3251 log_info("HCI_STATE_HALTING, calling off"); 3252 3253 // switch mode 3254 hci_power_control_off(); 3255 3256 log_info("HCI_STATE_HALTING, emitting state"); 3257 hci_emit_state(); 3258 log_info("HCI_STATE_HALTING, done"); 3259 break; 3260 3261 case HCI_STATE_FALLING_ASLEEP: 3262 switch(hci_stack->substate) { 3263 case HCI_FALLING_ASLEEP_DISCONNECT: 3264 log_info("HCI_STATE_FALLING_ASLEEP"); 3265 // close all open connections 3266 connection = (hci_connection_t *) hci_stack->connections; 3267 3268 #ifdef HAVE_PLATFORM_IPHONE_OS 3269 // don't close connections, if H4 supports power management 3270 if (btstack_control_iphone_power_management_enabled()){ 3271 connection = NULL; 3272 } 3273 #endif 3274 if (connection){ 3275 3276 // send disconnect 3277 if (!hci_can_send_command_packet_now()) return; 3278 3279 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3280 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3281 3282 // send disconnected event right away - causes higher layer connections to get closed, too. 3283 hci_shutdown_connection(connection); 3284 return; 3285 } 3286 3287 if (hci_classic_supported()){ 3288 // disable page and inquiry scan 3289 if (!hci_can_send_command_packet_now()) return; 3290 3291 log_info("HCI_STATE_HALTING, disabling inq scans"); 3292 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3293 3294 // continue in next sub state 3295 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3296 break; 3297 } 3298 // no break - fall through for ble-only chips 3299 3300 case HCI_FALLING_ASLEEP_COMPLETE: 3301 log_info("HCI_STATE_HALTING, calling sleep"); 3302 #ifdef HAVE_PLATFORM_IPHONE_OS 3303 // don't actually go to sleep, if H4 supports power management 3304 if (btstack_control_iphone_power_management_enabled()){ 3305 // SLEEP MODE reached 3306 hci_stack->state = HCI_STATE_SLEEPING; 3307 hci_emit_state(); 3308 break; 3309 } 3310 #endif 3311 // switch mode 3312 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3313 hci_emit_state(); 3314 break; 3315 3316 default: 3317 break; 3318 } 3319 break; 3320 3321 default: 3322 break; 3323 } 3324 } 3325 3326 int hci_send_cmd_packet(uint8_t *packet, int size){ 3327 // house-keeping 3328 3329 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3330 hci_stack->loopback_mode = packet[3]; 3331 } 3332 3333 #ifdef ENABLE_CLASSIC 3334 bd_addr_t addr; 3335 hci_connection_t * conn; 3336 3337 // create_connection? 3338 if (IS_COMMAND(packet, hci_create_connection)){ 3339 reverse_bd_addr(&packet[3], addr); 3340 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3341 3342 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3343 if (!conn){ 3344 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3345 if (!conn){ 3346 // notify client that alloc failed 3347 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3348 return 0; // don't sent packet to controller 3349 } 3350 conn->state = SEND_CREATE_CONNECTION; 3351 } 3352 log_info("conn state %u", conn->state); 3353 switch (conn->state){ 3354 // if connection active exists 3355 case OPEN: 3356 // and OPEN, emit connection complete command, don't send to controller 3357 hci_emit_connection_complete(addr, conn->con_handle, 0); 3358 return 0; 3359 case SEND_CREATE_CONNECTION: 3360 // connection created by hci, e.g. dedicated bonding 3361 break; 3362 default: 3363 // otherwise, just ignore as it is already in the open process 3364 return 0; 3365 } 3366 conn->state = SENT_CREATE_CONNECTION; 3367 } 3368 3369 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3370 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3371 } 3372 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3373 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3374 } 3375 3376 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3377 if (hci_stack->link_key_db){ 3378 reverse_bd_addr(&packet[3], addr); 3379 hci_stack->link_key_db->delete_link_key(addr); 3380 } 3381 } 3382 3383 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3384 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3385 reverse_bd_addr(&packet[3], addr); 3386 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3387 if (conn){ 3388 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3389 } 3390 } 3391 3392 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3393 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3394 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3395 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3396 reverse_bd_addr(&packet[3], addr); 3397 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3398 if (conn){ 3399 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3400 } 3401 } 3402 3403 #ifdef ENABLE_SCO_OVER_HCI 3404 // setup_synchronous_connection? Voice setting at offset 22 3405 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3406 // TODO: compare to current setting if sco connection already active 3407 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3408 } 3409 // accept_synchronus_connection? Voice setting at offset 18 3410 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3411 // TODO: compare to current setting if sco connection already active 3412 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3413 } 3414 #endif 3415 #endif 3416 3417 #ifdef ENABLE_BLE 3418 #ifdef ENABLE_LE_PERIPHERAL 3419 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3420 hci_stack->le_random_address_set = 1; 3421 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3422 } 3423 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3424 hci_stack->le_advertisements_active = packet[3]; 3425 } 3426 #endif 3427 #ifdef ENABLE_LE_CENTRAL 3428 if (IS_COMMAND(packet, hci_le_create_connection)){ 3429 // white list used? 3430 uint8_t initiator_filter_policy = packet[7]; 3431 switch (initiator_filter_policy){ 3432 case 0: 3433 // whitelist not used 3434 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3435 break; 3436 case 1: 3437 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3438 break; 3439 default: 3440 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3441 break; 3442 } 3443 } 3444 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3445 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3446 } 3447 #endif 3448 #endif 3449 3450 hci_stack->num_cmd_packets--; 3451 3452 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3453 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3454 3455 // release packet buffer for synchronous transport implementations 3456 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3457 hci_stack->hci_packet_buffer_reserved = 0; 3458 } 3459 3460 return err; 3461 } 3462 3463 // disconnect because of security block 3464 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3465 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3466 if (!connection) return; 3467 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3468 } 3469 3470 3471 // Configure Secure Simple Pairing 3472 3473 #ifdef ENABLE_CLASSIC 3474 3475 // enable will enable SSP during init 3476 void gap_ssp_set_enable(int enable){ 3477 hci_stack->ssp_enable = enable; 3478 } 3479 3480 static int hci_local_ssp_activated(void){ 3481 return gap_ssp_supported() && hci_stack->ssp_enable; 3482 } 3483 3484 // if set, BTstack will respond to io capability request using authentication requirement 3485 void gap_ssp_set_io_capability(int io_capability){ 3486 hci_stack->ssp_io_capability = io_capability; 3487 } 3488 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3489 hci_stack->ssp_authentication_requirement = authentication_requirement; 3490 } 3491 3492 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3493 void gap_ssp_set_auto_accept(int auto_accept){ 3494 hci_stack->ssp_auto_accept = auto_accept; 3495 } 3496 #endif 3497 3498 // va_list part of hci_send_cmd 3499 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3500 if (!hci_can_send_command_packet_now()){ 3501 log_error("hci_send_cmd called but cannot send packet now"); 3502 return 0; 3503 } 3504 3505 // for HCI INITIALIZATION 3506 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3507 hci_stack->last_cmd_opcode = cmd->opcode; 3508 3509 hci_reserve_packet_buffer(); 3510 uint8_t * packet = hci_stack->hci_packet_buffer; 3511 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3512 return hci_send_cmd_packet(packet, size); 3513 } 3514 3515 /** 3516 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3517 */ 3518 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3519 va_list argptr; 3520 va_start(argptr, cmd); 3521 int res = hci_send_cmd_va_arg(cmd, argptr); 3522 va_end(argptr); 3523 return res; 3524 } 3525 3526 // Create various non-HCI events. 3527 // TODO: generalize, use table similar to hci_create_command 3528 3529 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3530 // dump packet 3531 if (dump) { 3532 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3533 } 3534 3535 // dispatch to all event handlers 3536 btstack_linked_list_iterator_t it; 3537 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3538 while (btstack_linked_list_iterator_has_next(&it)){ 3539 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3540 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3541 } 3542 } 3543 3544 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3545 if (!hci_stack->acl_packet_handler) return; 3546 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3547 } 3548 3549 #ifdef ENABLE_CLASSIC 3550 static void hci_notify_if_sco_can_send_now(void){ 3551 // notify SCO sender if waiting 3552 if (!hci_stack->sco_waiting_for_can_send_now) return; 3553 if (hci_can_send_sco_packet_now()){ 3554 hci_stack->sco_waiting_for_can_send_now = 0; 3555 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3556 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3557 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3558 } 3559 } 3560 3561 // parsing end emitting has been merged to reduce code size 3562 static void gap_inquiry_explode(uint8_t * packet){ 3563 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3564 3565 uint8_t * eir_data; 3566 ad_context_t context; 3567 const uint8_t * name; 3568 uint8_t name_len; 3569 3570 int event_type = hci_event_packet_get_type(packet); 3571 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3572 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3573 3574 // event[1] is set at the end 3575 int i; 3576 for (i=0; i<num_responses;i++){ 3577 memset(event, 0, sizeof(event)); 3578 event[0] = GAP_EVENT_INQUIRY_RESULT; 3579 uint8_t event_size = 18; // if name is not set by EIR 3580 3581 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3582 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3583 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3584 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3585 3586 switch (event_type){ 3587 case HCI_EVENT_INQUIRY_RESULT: 3588 // 14,15,16,17 = 0, size 18 3589 break; 3590 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3591 event[14] = 1; 3592 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3593 // 16,17 = 0, size 18 3594 break; 3595 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3596 event[14] = 1; 3597 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3598 // for EIR packets, there is only one reponse in it 3599 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3600 name = NULL; 3601 // EIR data is 240 bytes in EIR event 3602 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3603 uint8_t data_type = ad_iterator_get_data_type(&context); 3604 uint8_t data_size = ad_iterator_get_data_len(&context); 3605 const uint8_t * data = ad_iterator_get_data(&context); 3606 // Prefer Complete Local Name over Shortend Local Name 3607 switch (data_type){ 3608 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3609 if (name) continue; 3610 /* explicit fall-through */ 3611 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3612 name = data; 3613 name_len = data_size; 3614 break; 3615 default: 3616 break; 3617 } 3618 } 3619 if (name){ 3620 event[16] = 1; 3621 // truncate name if needed 3622 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3623 event[17] = len; 3624 memcpy(&event[18], name, len); 3625 event_size += len; 3626 } 3627 break; 3628 } 3629 event[1] = event_size - 2; 3630 hci_emit_event(event, event_size, 1); 3631 } 3632 } 3633 #endif 3634 3635 void hci_emit_state(void){ 3636 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3637 uint8_t event[3]; 3638 event[0] = BTSTACK_EVENT_STATE; 3639 event[1] = sizeof(event) - 2; 3640 event[2] = hci_stack->state; 3641 hci_emit_event(event, sizeof(event), 1); 3642 } 3643 3644 #ifdef ENABLE_CLASSIC 3645 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3646 uint8_t event[13]; 3647 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3648 event[1] = sizeof(event) - 2; 3649 event[2] = status; 3650 little_endian_store_16(event, 3, con_handle); 3651 reverse_bd_addr(address, &event[5]); 3652 event[11] = 1; // ACL connection 3653 event[12] = 0; // encryption disabled 3654 hci_emit_event(event, sizeof(event), 1); 3655 } 3656 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3657 if (disable_l2cap_timeouts) return; 3658 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3659 uint8_t event[4]; 3660 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3661 event[1] = sizeof(event) - 2; 3662 little_endian_store_16(event, 2, conn->con_handle); 3663 hci_emit_event(event, sizeof(event), 1); 3664 } 3665 #endif 3666 3667 #ifdef ENABLE_BLE 3668 #ifdef ENABLE_LE_CENTRAL 3669 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3670 uint8_t event[21]; 3671 event[0] = HCI_EVENT_LE_META; 3672 event[1] = sizeof(event) - 2; 3673 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3674 event[3] = status; 3675 little_endian_store_16(event, 4, con_handle); 3676 event[6] = 0; // TODO: role 3677 event[7] = address_type; 3678 reverse_bd_addr(address, &event[8]); 3679 little_endian_store_16(event, 14, 0); // interval 3680 little_endian_store_16(event, 16, 0); // latency 3681 little_endian_store_16(event, 18, 0); // supervision timeout 3682 event[20] = 0; // master clock accuracy 3683 hci_emit_event(event, sizeof(event), 1); 3684 } 3685 #endif 3686 #endif 3687 3688 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3689 uint8_t event[6]; 3690 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3691 event[1] = sizeof(event) - 2; 3692 event[2] = 0; // status = OK 3693 little_endian_store_16(event, 3, con_handle); 3694 event[5] = reason; 3695 hci_emit_event(event, sizeof(event), 1); 3696 } 3697 3698 static void hci_emit_nr_connections_changed(void){ 3699 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3700 uint8_t event[3]; 3701 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3702 event[1] = sizeof(event) - 2; 3703 event[2] = nr_hci_connections(); 3704 hci_emit_event(event, sizeof(event), 1); 3705 } 3706 3707 static void hci_emit_hci_open_failed(void){ 3708 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3709 uint8_t event[2]; 3710 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3711 event[1] = sizeof(event) - 2; 3712 hci_emit_event(event, sizeof(event), 1); 3713 } 3714 3715 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3716 log_info("hci_emit_dedicated_bonding_result %u ", status); 3717 uint8_t event[9]; 3718 int pos = 0; 3719 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3720 event[pos++] = sizeof(event) - 2; 3721 event[pos++] = status; 3722 reverse_bd_addr(address, &event[pos]); 3723 hci_emit_event(event, sizeof(event), 1); 3724 } 3725 3726 3727 #ifdef ENABLE_CLASSIC 3728 3729 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3730 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3731 uint8_t event[5]; 3732 int pos = 0; 3733 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3734 event[pos++] = sizeof(event) - 2; 3735 little_endian_store_16(event, 2, con_handle); 3736 pos += 2; 3737 event[pos++] = level; 3738 hci_emit_event(event, sizeof(event), 1); 3739 } 3740 3741 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3742 if (!connection) return LEVEL_0; 3743 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3744 return gap_security_level_for_link_key_type(connection->link_key_type); 3745 } 3746 3747 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3748 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3749 uint8_t event[3]; 3750 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3751 event[1] = sizeof(event) - 2; 3752 event[2] = enabled; 3753 hci_emit_event(event, sizeof(event), 1); 3754 } 3755 3756 #ifdef ENABLE_CLASSIC 3757 // query if remote side supports eSCO 3758 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3759 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3760 if (!connection) return 0; 3761 return connection->remote_supported_feature_eSCO; 3762 } 3763 3764 // query if remote side supports SSP 3765 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3766 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3767 if (!connection) return 0; 3768 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3769 } 3770 3771 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3772 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3773 } 3774 #endif 3775 3776 // GAP API 3777 /** 3778 * @bbrief enable/disable bonding. default is enabled 3779 * @praram enabled 3780 */ 3781 void gap_set_bondable_mode(int enable){ 3782 hci_stack->bondable = enable ? 1 : 0; 3783 } 3784 /** 3785 * @brief Get bondable mode. 3786 * @return 1 if bondable 3787 */ 3788 int gap_get_bondable_mode(void){ 3789 return hci_stack->bondable; 3790 } 3791 3792 /** 3793 * @brief map link keys to security levels 3794 */ 3795 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3796 switch (link_key_type){ 3797 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3798 return LEVEL_4; 3799 case COMBINATION_KEY: 3800 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3801 return LEVEL_3; 3802 default: 3803 return LEVEL_2; 3804 } 3805 } 3806 3807 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3808 log_info("gap_mitm_protection_required_for_security_level %u", level); 3809 return level > LEVEL_2; 3810 } 3811 3812 /** 3813 * @brief get current security level 3814 */ 3815 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3816 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3817 if (!connection) return LEVEL_0; 3818 return gap_security_level_for_connection(connection); 3819 } 3820 3821 /** 3822 * @brief request connection to device to 3823 * @result GAP_AUTHENTICATION_RESULT 3824 */ 3825 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3826 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3827 if (!connection){ 3828 hci_emit_security_level(con_handle, LEVEL_0); 3829 return; 3830 } 3831 gap_security_level_t current_level = gap_security_level(con_handle); 3832 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3833 if (current_level >= requested_level){ 3834 hci_emit_security_level(con_handle, current_level); 3835 return; 3836 } 3837 3838 connection->requested_security_level = requested_level; 3839 3840 #if 0 3841 // sending encryption request without a link key results in an error. 3842 // TODO: figure out how to use it properly 3843 3844 // would enabling ecnryption suffice (>= LEVEL_2)? 3845 if (hci_stack->link_key_db){ 3846 link_key_type_t link_key_type; 3847 link_key_t link_key; 3848 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3849 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3850 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3851 return; 3852 } 3853 } 3854 } 3855 #endif 3856 3857 // try to authenticate connection 3858 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3859 hci_run(); 3860 } 3861 3862 /** 3863 * @brief start dedicated bonding with device. disconnect after bonding 3864 * @param device 3865 * @param request MITM protection 3866 * @result GAP_DEDICATED_BONDING_COMPLETE 3867 */ 3868 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3869 3870 // create connection state machine 3871 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3872 3873 if (!connection){ 3874 return BTSTACK_MEMORY_ALLOC_FAILED; 3875 } 3876 3877 // delete linkn key 3878 gap_drop_link_key_for_bd_addr(device); 3879 3880 // configure LEVEL_2/3, dedicated bonding 3881 connection->state = SEND_CREATE_CONNECTION; 3882 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3883 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3884 connection->bonding_flags = BONDING_DEDICATED; 3885 3886 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3887 3888 // handle: connnection failure (connection complete != ok) 3889 // handle: authentication failure 3890 // handle: disconnect on done 3891 3892 hci_run(); 3893 3894 return 0; 3895 } 3896 #endif 3897 3898 void gap_set_local_name(const char * local_name){ 3899 hci_stack->local_name = local_name; 3900 } 3901 3902 3903 #ifdef ENABLE_BLE 3904 3905 #ifdef ENABLE_LE_CENTRAL 3906 void gap_start_scan(void){ 3907 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3908 hci_stack->le_scanning_state = LE_START_SCAN; 3909 hci_run(); 3910 } 3911 3912 void gap_stop_scan(void){ 3913 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3914 hci_stack->le_scanning_state = LE_STOP_SCAN; 3915 hci_run(); 3916 } 3917 3918 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3919 hci_stack->le_scan_type = scan_type; 3920 hci_stack->le_scan_interval = scan_interval; 3921 hci_stack->le_scan_window = scan_window; 3922 hci_run(); 3923 } 3924 3925 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3926 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3927 if (!conn){ 3928 log_info("gap_connect: no connection exists yet, creating context"); 3929 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3930 if (!conn){ 3931 // notify client that alloc failed 3932 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3933 log_info("gap_connect: failed to alloc hci_connection_t"); 3934 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3935 } 3936 conn->state = SEND_CREATE_CONNECTION; 3937 log_info("gap_connect: send create connection next"); 3938 hci_run(); 3939 return 0; 3940 } 3941 3942 if (!hci_is_le_connection(conn) || 3943 conn->state == SEND_CREATE_CONNECTION || 3944 conn->state == SENT_CREATE_CONNECTION) { 3945 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3946 log_error("gap_connect: classic connection or connect is already being created"); 3947 return GATT_CLIENT_IN_WRONG_STATE; 3948 } 3949 3950 log_info("gap_connect: context exists with state %u", conn->state); 3951 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3952 hci_run(); 3953 return 0; 3954 } 3955 3956 // @assumption: only a single outgoing LE Connection exists 3957 static hci_connection_t * gap_get_outgoing_connection(void){ 3958 btstack_linked_item_t *it; 3959 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3960 hci_connection_t * conn = (hci_connection_t *) it; 3961 if (!hci_is_le_connection(conn)) continue; 3962 switch (conn->state){ 3963 case SEND_CREATE_CONNECTION: 3964 case SENT_CREATE_CONNECTION: 3965 return conn; 3966 default: 3967 break; 3968 }; 3969 } 3970 return NULL; 3971 } 3972 3973 uint8_t gap_connect_cancel(void){ 3974 hci_connection_t * conn = gap_get_outgoing_connection(); 3975 if (!conn) return 0; 3976 switch (conn->state){ 3977 case SEND_CREATE_CONNECTION: 3978 // skip sending create connection and emit event instead 3979 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3980 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3981 btstack_memory_hci_connection_free( conn ); 3982 break; 3983 case SENT_CREATE_CONNECTION: 3984 // request to send cancel connection 3985 conn->state = SEND_CANCEL_CONNECTION; 3986 hci_run(); 3987 break; 3988 default: 3989 break; 3990 } 3991 return 0; 3992 } 3993 #endif 3994 3995 #ifdef ENABLE_LE_CENTRAL 3996 /** 3997 * @brief Set connection parameters for outgoing connections 3998 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 3999 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4000 * @param conn_latency, default: 4 4001 * @param supervision_timeout (unit: 10ms), default: 720 ms 4002 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4003 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4004 */ 4005 4006 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 4007 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4008 hci_stack->le_connection_interval_min = conn_interval_min; 4009 hci_stack->le_connection_interval_max = conn_interval_max; 4010 hci_stack->le_connection_latency = conn_latency; 4011 hci_stack->le_supervision_timeout = supervision_timeout; 4012 hci_stack->le_minimum_ce_length = min_ce_length; 4013 hci_stack->le_maximum_ce_length = max_ce_length; 4014 } 4015 #endif 4016 4017 /** 4018 * @brief Updates the connection parameters for a given LE connection 4019 * @param handle 4020 * @param conn_interval_min (unit: 1.25ms) 4021 * @param conn_interval_max (unit: 1.25ms) 4022 * @param conn_latency 4023 * @param supervision_timeout (unit: 10ms) 4024 * @returns 0 if ok 4025 */ 4026 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4027 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4028 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4029 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4030 connection->le_conn_interval_min = conn_interval_min; 4031 connection->le_conn_interval_max = conn_interval_max; 4032 connection->le_conn_latency = conn_latency; 4033 connection->le_supervision_timeout = supervision_timeout; 4034 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4035 hci_run(); 4036 return 0; 4037 } 4038 4039 /** 4040 * @brief Request an update of the connection parameter for a given LE connection 4041 * @param handle 4042 * @param conn_interval_min (unit: 1.25ms) 4043 * @param conn_interval_max (unit: 1.25ms) 4044 * @param conn_latency 4045 * @param supervision_timeout (unit: 10ms) 4046 * @returns 0 if ok 4047 */ 4048 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4049 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4050 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4051 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4052 connection->le_conn_interval_min = conn_interval_min; 4053 connection->le_conn_interval_max = conn_interval_max; 4054 connection->le_conn_latency = conn_latency; 4055 connection->le_supervision_timeout = supervision_timeout; 4056 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4057 hci_run(); 4058 return 0; 4059 } 4060 4061 #ifdef ENABLE_LE_PERIPHERAL 4062 4063 static void gap_advertisments_changed(void){ 4064 // disable advertisements before updating adv, scan data, or adv params 4065 if (hci_stack->le_advertisements_active){ 4066 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4067 } 4068 hci_run(); 4069 } 4070 4071 /** 4072 * @brief Set Advertisement Data 4073 * @param advertising_data_length 4074 * @param advertising_data (max 31 octets) 4075 * @note data is not copied, pointer has to stay valid 4076 */ 4077 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4078 hci_stack->le_advertisements_data_len = advertising_data_length; 4079 hci_stack->le_advertisements_data = advertising_data; 4080 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4081 gap_advertisments_changed(); 4082 } 4083 4084 /** 4085 * @brief Set Scan Response Data 4086 * @param advertising_data_length 4087 * @param advertising_data (max 31 octets) 4088 * @note data is not copied, pointer has to stay valid 4089 */ 4090 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4091 hci_stack->le_scan_response_data_len = scan_response_data_length; 4092 hci_stack->le_scan_response_data = scan_response_data; 4093 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4094 gap_advertisments_changed(); 4095 } 4096 4097 /** 4098 * @brief Set Advertisement Parameters 4099 * @param adv_int_min 4100 * @param adv_int_max 4101 * @param adv_type 4102 * @param direct_address_type 4103 * @param direct_address 4104 * @param channel_map 4105 * @param filter_policy 4106 * 4107 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4108 */ 4109 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4110 uint8_t direct_address_typ, bd_addr_t direct_address, 4111 uint8_t channel_map, uint8_t filter_policy) { 4112 4113 hci_stack->le_advertisements_interval_min = adv_int_min; 4114 hci_stack->le_advertisements_interval_max = adv_int_max; 4115 hci_stack->le_advertisements_type = adv_type; 4116 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4117 hci_stack->le_advertisements_channel_map = channel_map; 4118 hci_stack->le_advertisements_filter_policy = filter_policy; 4119 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4120 4121 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4122 gap_advertisments_changed(); 4123 } 4124 4125 /** 4126 * @brief Enable/Disable Advertisements 4127 * @param enabled 4128 */ 4129 void gap_advertisements_enable(int enabled){ 4130 hci_stack->le_advertisements_enabled = enabled; 4131 if (enabled && !hci_stack->le_advertisements_active){ 4132 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4133 } 4134 if (!enabled && hci_stack->le_advertisements_active){ 4135 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4136 } 4137 hci_run(); 4138 } 4139 4140 #endif 4141 4142 void hci_le_set_own_address_type(uint8_t own_address_type){ 4143 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4144 if (own_address_type == hci_stack->le_own_addr_type) return; 4145 hci_stack->le_own_addr_type = own_address_type; 4146 4147 #ifdef ENABLE_LE_PERIPHERAL 4148 // update advertisement parameters, too 4149 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4150 gap_advertisments_changed(); 4151 #endif 4152 #ifdef ENABLE_LE_CENTRAL 4153 // note: we don't update scan parameters or modify ongoing connection attempts 4154 #endif 4155 } 4156 4157 #endif 4158 4159 uint8_t gap_disconnect(hci_con_handle_t handle){ 4160 hci_connection_t * conn = hci_connection_for_handle(handle); 4161 if (!conn){ 4162 hci_emit_disconnection_complete(handle, 0); 4163 return 0; 4164 } 4165 conn->state = SEND_DISCONNECT; 4166 hci_run(); 4167 return 0; 4168 } 4169 4170 /** 4171 * @brief Get connection type 4172 * @param con_handle 4173 * @result connection_type 4174 */ 4175 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4176 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4177 if (!conn) return GAP_CONNECTION_INVALID; 4178 switch (conn->address_type){ 4179 case BD_ADDR_TYPE_LE_PUBLIC: 4180 case BD_ADDR_TYPE_LE_RANDOM: 4181 return GAP_CONNECTION_LE; 4182 case BD_ADDR_TYPE_SCO: 4183 return GAP_CONNECTION_SCO; 4184 case BD_ADDR_TYPE_CLASSIC: 4185 return GAP_CONNECTION_ACL; 4186 default: 4187 return GAP_CONNECTION_INVALID; 4188 } 4189 } 4190 4191 #ifdef ENABLE_BLE 4192 4193 #ifdef ENABLE_LE_CENTRAL 4194 /** 4195 * @brief Auto Connection Establishment - Start Connecting to device 4196 * @param address_typ 4197 * @param address 4198 * @returns 0 if ok 4199 */ 4200 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4201 // check capacity 4202 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4203 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4204 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4205 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4206 entry->address_type = address_type; 4207 memcpy(entry->address, address, 6); 4208 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4209 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4210 hci_run(); 4211 return 0; 4212 } 4213 4214 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4215 btstack_linked_list_iterator_t it; 4216 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4217 while (btstack_linked_list_iterator_has_next(&it)){ 4218 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4219 if (entry->address_type != address_type) continue; 4220 if (memcmp(entry->address, address, 6) != 0) continue; 4221 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4222 // remove from controller if already present 4223 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4224 continue; 4225 } 4226 // direclty remove entry from whitelist 4227 btstack_linked_list_iterator_remove(&it); 4228 btstack_memory_whitelist_entry_free(entry); 4229 } 4230 } 4231 4232 /** 4233 * @brief Auto Connection Establishment - Stop Connecting to device 4234 * @param address_typ 4235 * @param address 4236 * @returns 0 if ok 4237 */ 4238 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4239 hci_remove_from_whitelist(address_type, address); 4240 hci_run(); 4241 return 0; 4242 } 4243 4244 /** 4245 * @brief Auto Connection Establishment - Stop everything 4246 * @note Convenience function to stop all active auto connection attempts 4247 */ 4248 void gap_auto_connection_stop_all(void){ 4249 btstack_linked_list_iterator_t it; 4250 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4251 while (btstack_linked_list_iterator_has_next(&it)){ 4252 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4253 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4254 // remove from controller if already present 4255 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4256 continue; 4257 } 4258 // directly remove entry from whitelist 4259 btstack_linked_list_iterator_remove(&it); 4260 btstack_memory_whitelist_entry_free(entry); 4261 } 4262 hci_run(); 4263 } 4264 #endif 4265 #endif 4266 4267 #ifdef ENABLE_CLASSIC 4268 /** 4269 * @brief Set Extended Inquiry Response data 4270 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4271 * @note has to be done before stack starts up 4272 */ 4273 void gap_set_extended_inquiry_response(const uint8_t * data){ 4274 hci_stack->eir_data = data; 4275 } 4276 4277 /** 4278 * @brief Start GAP Classic Inquiry 4279 * @param duration in 1.28s units 4280 * @return 0 if ok 4281 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4282 */ 4283 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4284 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4285 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4286 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4287 } 4288 hci_stack->inquiry_state = duration_in_1280ms_units; 4289 hci_run(); 4290 return 0; 4291 } 4292 4293 /** 4294 * @brief Stop GAP Classic Inquiry 4295 * @returns 0 if ok 4296 */ 4297 int gap_inquiry_stop(void){ 4298 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4299 // emit inquiry complete event, before it even started 4300 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4301 hci_emit_event(event, sizeof(event), 1); 4302 return 0; 4303 } 4304 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4305 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4306 hci_run(); 4307 return 0; 4308 } 4309 4310 4311 /** 4312 * @brief Remote Name Request 4313 * @param addr 4314 * @param page_scan_repetition_mode 4315 * @param clock_offset only used when bit 15 is set 4316 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4317 */ 4318 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4319 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4320 memcpy(hci_stack->remote_name_addr, addr, 6); 4321 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4322 hci_stack->remote_name_clock_offset = clock_offset; 4323 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4324 hci_run(); 4325 return 0; 4326 } 4327 4328 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4329 hci_stack->gap_pairing_state = state; 4330 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4331 hci_run(); 4332 return 0; 4333 } 4334 4335 /** 4336 * @brief Legacy Pairing Pin Code Response 4337 * @param addr 4338 * @param pin 4339 * @return 0 if ok 4340 */ 4341 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4342 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4343 hci_stack->gap_pairing_pin = pin; 4344 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4345 } 4346 4347 /** 4348 * @brief Abort Legacy Pairing 4349 * @param addr 4350 * @param pin 4351 * @return 0 if ok 4352 */ 4353 int gap_pin_code_negative(bd_addr_t addr){ 4354 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4355 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4356 } 4357 4358 /** 4359 * @brief SSP Passkey Response 4360 * @param addr 4361 * @param passkey 4362 * @return 0 if ok 4363 */ 4364 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4365 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4366 hci_stack->gap_pairing_passkey = passkey; 4367 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4368 } 4369 4370 /** 4371 * @brief Abort SSP Passkey Entry/Pairing 4372 * @param addr 4373 * @param pin 4374 * @return 0 if ok 4375 */ 4376 int gap_ssp_passkey_negative(bd_addr_t addr){ 4377 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4378 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4379 } 4380 4381 /** 4382 * @brief Accept SSP Numeric Comparison 4383 * @param addr 4384 * @param passkey 4385 * @return 0 if ok 4386 */ 4387 int gap_ssp_confirmation_response(bd_addr_t addr){ 4388 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4389 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4390 } 4391 4392 /** 4393 * @brief Abort SSP Numeric Comparison/Pairing 4394 * @param addr 4395 * @param pin 4396 * @return 0 if ok 4397 */ 4398 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4399 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4400 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4401 } 4402 4403 /** 4404 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4405 * @param inquiry_mode see bluetooth_defines.h 4406 */ 4407 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4408 hci_stack->inquiry_mode = mode; 4409 } 4410 4411 /** 4412 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4413 */ 4414 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4415 hci_stack->sco_voice_setting = voice_setting; 4416 } 4417 4418 /** 4419 * @brief Get SCO Voice Setting 4420 * @return current voice setting 4421 */ 4422 uint16_t hci_get_sco_voice_setting(void){ 4423 return hci_stack->sco_voice_setting; 4424 } 4425 4426 /** @brief Get SCO packet length for current SCO Voice setting 4427 * @note Using SCO packets of the exact length is required for USB transfer 4428 * @return Length of SCO packets in bytes (not audio frames) 4429 */ 4430 int hci_get_sco_packet_length(void){ 4431 // see Core Spec for H2 USB Transfer. 4432 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4433 return 27; 4434 } 4435 #endif 4436 4437 4438 HCI_STATE hci_get_state(void){ 4439 return hci_stack->state; 4440 } 4441 4442 4443 /** 4444 * @brief Set callback for Bluetooth Hardware Error 4445 */ 4446 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4447 hci_stack->hardware_error_callback = fn; 4448 } 4449 4450 void hci_disconnect_all(void){ 4451 btstack_linked_list_iterator_t it; 4452 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4453 while (btstack_linked_list_iterator_has_next(&it)){ 4454 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4455 if (con->state == SENT_DISCONNECT) continue; 4456 con->state = SEND_DISCONNECT; 4457 } 4458 hci_run(); 4459 } 4460 4461 uint16_t hci_get_manufacturer(void){ 4462 return hci_stack->manufacturer; 4463 } 4464