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, uint16_t 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 // default name 172 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 173 174 // test helper 175 static uint8_t disable_l2cap_timeouts = 0; 176 #endif 177 178 /** 179 * create connection for given address 180 * 181 * @return connection OR NULL, if no memory left 182 */ 183 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 184 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 185 hci_connection_t * conn = btstack_memory_hci_connection_get(); 186 if (!conn) return NULL; 187 memset(conn, 0, sizeof(hci_connection_t)); 188 bd_addr_copy(conn->address, addr); 189 conn->address_type = addr_type; 190 conn->con_handle = 0xffff; 191 conn->authentication_flags = AUTH_FLAGS_NONE; 192 conn->bonding_flags = 0; 193 conn->requested_security_level = LEVEL_0; 194 #ifdef ENABLE_CLASSIC 195 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 196 btstack_run_loop_set_timer_context(&conn->timeout, conn); 197 hci_connection_timestamp(conn); 198 #endif 199 conn->acl_recombination_length = 0; 200 conn->acl_recombination_pos = 0; 201 conn->num_acl_packets_sent = 0; 202 conn->num_sco_packets_sent = 0; 203 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 204 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 205 return conn; 206 } 207 208 209 /** 210 * get le connection parameter range 211 * 212 * @return le connection parameter range struct 213 */ 214 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 215 *range = hci_stack->le_connection_parameter_range; 216 } 217 218 /** 219 * set le connection parameter range 220 * 221 */ 222 223 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 224 hci_stack->le_connection_parameter_range = *range; 225 } 226 227 /** 228 * get hci connections iterator 229 * 230 * @return hci connections iterator 231 */ 232 233 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 234 btstack_linked_list_iterator_init(it, &hci_stack->connections); 235 } 236 237 /** 238 * get connection for a given handle 239 * 240 * @return connection OR NULL, if not found 241 */ 242 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 243 btstack_linked_list_iterator_t it; 244 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 245 while (btstack_linked_list_iterator_has_next(&it)){ 246 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 247 if ( item->con_handle == con_handle ) { 248 return item; 249 } 250 } 251 return NULL; 252 } 253 254 /** 255 * get connection for given address 256 * 257 * @return connection OR NULL, if not found 258 */ 259 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 260 btstack_linked_list_iterator_t it; 261 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 262 while (btstack_linked_list_iterator_has_next(&it)){ 263 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 264 if (connection->address_type != addr_type) continue; 265 if (memcmp(addr, connection->address, 6) != 0) continue; 266 return connection; 267 } 268 return NULL; 269 } 270 271 272 #ifdef ENABLE_CLASSIC 273 274 #ifdef ENABLE_SCO_OVER_HCI 275 static int hci_number_sco_connections(void){ 276 int connections = 0; 277 btstack_linked_list_iterator_t it; 278 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 279 while (btstack_linked_list_iterator_has_next(&it)){ 280 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 281 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 282 connections++; 283 } 284 return connections; 285 } 286 #endif 287 288 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 289 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 290 #ifdef HAVE_EMBEDDED_TICK 291 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 292 // connections might be timed out 293 hci_emit_l2cap_check_timeout(connection); 294 } 295 #else 296 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 297 // connections might be timed out 298 hci_emit_l2cap_check_timeout(connection); 299 } 300 #endif 301 } 302 303 static void hci_connection_timestamp(hci_connection_t *connection){ 304 #ifdef HAVE_EMBEDDED_TICK 305 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 306 #else 307 connection->timestamp = btstack_run_loop_get_time_ms(); 308 #endif 309 } 310 311 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 312 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 313 } 314 315 316 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 317 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 318 } 319 320 /** 321 * add authentication flags and reset timer 322 * @note: assumes classic connection 323 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 324 */ 325 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 326 bd_addr_t addr; 327 reverse_bd_addr(bd_addr, addr); 328 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 329 if (conn) { 330 connectionSetAuthenticationFlags(conn, flags); 331 hci_connection_timestamp(conn); 332 } 333 } 334 335 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 336 hci_connection_t * conn = hci_connection_for_handle(handle); 337 if (!conn) return 0; 338 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 339 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 340 return 0; 341 } 342 343 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 344 if (!hci_stack->link_key_db) return; 345 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 346 hci_stack->link_key_db->delete_link_key(addr); 347 } 348 349 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 350 if (!hci_stack->link_key_db) return; 351 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 352 hci_stack->link_key_db->put_link_key(addr, link_key, type); 353 } 354 #endif 355 356 static int hci_is_le_connection(hci_connection_t * connection){ 357 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 358 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 359 } 360 361 /** 362 * count connections 363 */ 364 static int nr_hci_connections(void){ 365 int count = 0; 366 btstack_linked_item_t *it; 367 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 368 return count; 369 } 370 371 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 372 373 unsigned int num_packets_sent_classic = 0; 374 unsigned int num_packets_sent_le = 0; 375 376 btstack_linked_item_t *it; 377 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 378 hci_connection_t * connection = (hci_connection_t *) it; 379 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 380 num_packets_sent_classic += connection->num_acl_packets_sent; 381 } else { 382 num_packets_sent_le += connection->num_acl_packets_sent; 383 } 384 } 385 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 386 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 387 int free_slots_le = 0; 388 389 if (free_slots_classic < 0){ 390 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); 391 return 0; 392 } 393 394 if (hci_stack->le_acl_packets_total_num){ 395 // if we have LE slots, they are used 396 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 397 if (free_slots_le < 0){ 398 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); 399 return 0; 400 } 401 } else { 402 // otherwise, classic slots are used for LE, too 403 free_slots_classic -= num_packets_sent_le; 404 if (free_slots_classic < 0){ 405 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); 406 return 0; 407 } 408 } 409 410 switch (address_type){ 411 case BD_ADDR_TYPE_UNKNOWN: 412 log_error("hci_number_free_acl_slots: unknown address type"); 413 return 0; 414 415 case BD_ADDR_TYPE_CLASSIC: 416 return free_slots_classic; 417 418 default: 419 if (hci_stack->le_acl_packets_total_num){ 420 return free_slots_le; 421 } 422 return free_slots_classic; 423 } 424 } 425 426 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 427 // get connection type 428 hci_connection_t * connection = hci_connection_for_handle(con_handle); 429 if (!connection){ 430 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 431 return 0; 432 } 433 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 434 } 435 436 #ifdef ENABLE_CLASSIC 437 static int hci_number_free_sco_slots(void){ 438 unsigned int num_sco_packets_sent = 0; 439 btstack_linked_item_t *it; 440 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 441 hci_connection_t * connection = (hci_connection_t *) it; 442 num_sco_packets_sent += connection->num_sco_packets_sent; 443 } 444 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 445 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 446 return 0; 447 } 448 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 449 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 450 } 451 #endif 452 453 // only used to send HCI Host Number Completed Packets 454 static int hci_can_send_comand_packet_transport(void){ 455 if (hci_stack->hci_packet_buffer_reserved) return 0; 456 457 // check for async hci transport implementations 458 if (hci_stack->hci_transport->can_send_packet_now){ 459 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 460 return 0; 461 } 462 } 463 return 1; 464 } 465 466 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 467 int hci_can_send_command_packet_now(void){ 468 if (hci_can_send_comand_packet_transport() == 0) return 0; 469 return hci_stack->num_cmd_packets > 0; 470 } 471 472 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 473 // check for async hci transport implementations 474 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 475 return hci_stack->hci_transport->can_send_packet_now(packet_type); 476 } 477 478 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 479 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 480 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 481 } 482 483 int hci_can_send_acl_le_packet_now(void){ 484 if (hci_stack->hci_packet_buffer_reserved) return 0; 485 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 486 } 487 488 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 489 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 490 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 491 } 492 493 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 494 if (hci_stack->hci_packet_buffer_reserved) return 0; 495 return hci_can_send_prepared_acl_packet_now(con_handle); 496 } 497 498 #ifdef ENABLE_CLASSIC 499 int hci_can_send_acl_classic_packet_now(void){ 500 if (hci_stack->hci_packet_buffer_reserved) return 0; 501 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 502 } 503 504 int hci_can_send_prepared_sco_packet_now(void){ 505 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 506 if (!hci_stack->synchronous_flow_control_enabled) return 1; 507 return hci_number_free_sco_slots() > 0; 508 } 509 510 int hci_can_send_sco_packet_now(void){ 511 if (hci_stack->hci_packet_buffer_reserved) return 0; 512 return hci_can_send_prepared_sco_packet_now(); 513 } 514 515 void hci_request_sco_can_send_now_event(void){ 516 hci_stack->sco_waiting_for_can_send_now = 1; 517 hci_notify_if_sco_can_send_now(); 518 } 519 #endif 520 521 // used for internal checks in l2cap.c 522 int hci_is_packet_buffer_reserved(void){ 523 return hci_stack->hci_packet_buffer_reserved; 524 } 525 526 // reserves outgoing packet buffer. @returns 1 if successful 527 int hci_reserve_packet_buffer(void){ 528 if (hci_stack->hci_packet_buffer_reserved) { 529 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 530 return 0; 531 } 532 hci_stack->hci_packet_buffer_reserved = 1; 533 return 1; 534 } 535 536 void hci_release_packet_buffer(void){ 537 hci_stack->hci_packet_buffer_reserved = 0; 538 } 539 540 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 541 static int hci_transport_synchronous(void){ 542 return hci_stack->hci_transport->can_send_packet_now == NULL; 543 } 544 545 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 546 547 // 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); 548 549 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 550 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 551 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 552 max_acl_data_packet_length = hci_stack->le_data_packets_length; 553 } 554 555 // testing: reduce buffer to minimum 556 // max_acl_data_packet_length = 52; 557 558 log_debug("hci_send_acl_packet_fragments entered"); 559 560 int err; 561 // multiple packets could be send on a synchronous HCI transport 562 while (1){ 563 564 log_debug("hci_send_acl_packet_fragments loop entered"); 565 566 // get current data 567 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 568 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 569 int more_fragments = 0; 570 571 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 572 if (current_acl_data_packet_length > max_acl_data_packet_length){ 573 more_fragments = 1; 574 current_acl_data_packet_length = max_acl_data_packet_length; 575 } 576 577 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 578 if (acl_header_pos > 0){ 579 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 580 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 581 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 582 } 583 584 // update header len 585 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 586 587 // count packet 588 connection->num_acl_packets_sent++; 589 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 590 591 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 592 if (more_fragments){ 593 // update start of next fragment to send 594 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 595 } else { 596 // done 597 hci_stack->acl_fragmentation_pos = 0; 598 hci_stack->acl_fragmentation_total_size = 0; 599 } 600 601 // send packet 602 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 603 const int size = current_acl_data_packet_length + 4; 604 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 605 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 606 607 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 608 609 // done yet? 610 if (!more_fragments) break; 611 612 // can send more? 613 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 614 } 615 616 log_debug("hci_send_acl_packet_fragments loop over"); 617 618 // release buffer now for synchronous transport 619 if (hci_transport_synchronous()){ 620 hci_release_packet_buffer(); 621 // notify upper stack that it might be possible to send again 622 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 623 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 624 } 625 626 return err; 627 } 628 629 // pre: caller has reserved the packet buffer 630 int hci_send_acl_packet_buffer(int size){ 631 632 // log_info("hci_send_acl_packet_buffer size %u", size); 633 634 if (!hci_stack->hci_packet_buffer_reserved) { 635 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 636 return 0; 637 } 638 639 uint8_t * packet = hci_stack->hci_packet_buffer; 640 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 641 642 // check for free places on Bluetooth module 643 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 644 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 645 hci_release_packet_buffer(); 646 return BTSTACK_ACL_BUFFERS_FULL; 647 } 648 649 hci_connection_t *connection = hci_connection_for_handle( con_handle); 650 if (!connection) { 651 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 652 hci_release_packet_buffer(); 653 return 0; 654 } 655 656 #ifdef ENABLE_CLASSIC 657 hci_connection_timestamp(connection); 658 #endif 659 660 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 661 662 // setup data 663 hci_stack->acl_fragmentation_total_size = size; 664 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 665 666 return hci_send_acl_packet_fragments(connection); 667 } 668 669 #ifdef ENABLE_CLASSIC 670 // pre: caller has reserved the packet buffer 671 int hci_send_sco_packet_buffer(int size){ 672 673 // log_info("hci_send_acl_packet_buffer size %u", size); 674 675 if (!hci_stack->hci_packet_buffer_reserved) { 676 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 677 return 0; 678 } 679 680 uint8_t * packet = hci_stack->hci_packet_buffer; 681 682 // skip checks in loopback mode 683 if (!hci_stack->loopback_mode){ 684 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 685 686 // check for free places on Bluetooth module 687 if (!hci_can_send_prepared_sco_packet_now()) { 688 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 689 hci_release_packet_buffer(); 690 return BTSTACK_ACL_BUFFERS_FULL; 691 } 692 693 // track send packet in connection struct 694 hci_connection_t *connection = hci_connection_for_handle( con_handle); 695 if (!connection) { 696 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 697 hci_release_packet_buffer(); 698 return 0; 699 } 700 connection->num_sco_packets_sent++; 701 } 702 703 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 704 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 705 706 if (hci_transport_synchronous()){ 707 hci_release_packet_buffer(); 708 // notify upper stack that it might be possible to send again 709 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 710 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 711 } 712 713 return err; 714 } 715 #endif 716 717 static void acl_handler(uint8_t *packet, int size){ 718 719 // log_info("acl_handler: size %u", size); 720 721 // get info 722 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 723 hci_connection_t *conn = hci_connection_for_handle(con_handle); 724 uint8_t acl_flags = READ_ACL_FLAGS(packet); 725 uint16_t acl_length = READ_ACL_LENGTH(packet); 726 727 // ignore non-registered handle 728 if (!conn){ 729 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 730 return; 731 } 732 733 // assert packet is complete 734 if (acl_length + 4 != size){ 735 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 736 return; 737 } 738 739 #ifdef ENABLE_CLASSIC 740 // update idle timestamp 741 hci_connection_timestamp(conn); 742 #endif 743 744 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 745 hci_stack->host_completed_packets = 1; 746 conn->num_packets_completed++; 747 #endif 748 749 // handle different packet types 750 switch (acl_flags & 0x03) { 751 752 case 0x01: // continuation fragment 753 754 // sanity checks 755 if (conn->acl_recombination_pos == 0) { 756 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 757 return; 758 } 759 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 760 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 761 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 762 conn->acl_recombination_pos = 0; 763 return; 764 } 765 766 // append fragment payload (header already stored) 767 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 768 conn->acl_recombination_pos += acl_length; 769 770 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 771 // conn->acl_recombination_pos, conn->acl_recombination_length); 772 773 // forward complete L2CAP packet if complete. 774 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 775 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 776 // reset recombination buffer 777 conn->acl_recombination_length = 0; 778 conn->acl_recombination_pos = 0; 779 } 780 break; 781 782 case 0x02: { // first fragment 783 784 // sanity check 785 if (conn->acl_recombination_pos) { 786 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 787 conn->acl_recombination_pos = 0; 788 } 789 790 // peek into L2CAP packet! 791 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 792 793 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 794 795 // compare fragment size to L2CAP packet size 796 if (acl_length >= l2cap_length + 4){ 797 // forward fragment as L2CAP packet 798 hci_emit_acl_packet(packet, acl_length + 4); 799 } else { 800 801 if (acl_length > HCI_ACL_BUFFER_SIZE){ 802 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 803 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 804 return; 805 } 806 807 // store first fragment and tweak acl length for complete package 808 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 809 conn->acl_recombination_pos = acl_length + 4; 810 conn->acl_recombination_length = l2cap_length; 811 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 812 } 813 break; 814 815 } 816 default: 817 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 818 return; 819 } 820 821 // execute main loop 822 hci_run(); 823 } 824 825 static void hci_shutdown_connection(hci_connection_t *conn){ 826 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 827 828 #ifdef ENABLE_CLASSIC 829 #ifdef ENABLE_SCO_OVER_HCI 830 int addr_type = conn->address_type; 831 #endif 832 #endif 833 834 btstack_run_loop_remove_timer(&conn->timeout); 835 836 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 837 btstack_memory_hci_connection_free( conn ); 838 839 // now it's gone 840 hci_emit_nr_connections_changed(); 841 842 #ifdef ENABLE_CLASSIC 843 #ifdef ENABLE_SCO_OVER_HCI 844 // update SCO 845 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 846 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 847 } 848 #endif 849 #endif 850 } 851 852 #ifdef ENABLE_CLASSIC 853 854 static const uint16_t packet_type_sizes[] = { 855 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 856 HCI_ACL_DH1_SIZE, 0, 0, 0, 857 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 858 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 859 }; 860 static const uint8_t packet_type_feature_requirement_bit[] = { 861 0, // 3 slot packets 862 1, // 5 slot packets 863 25, // EDR 2 mpbs 864 26, // EDR 3 mbps 865 39, // 3 slot EDR packts 866 40, // 5 slot EDR packet 867 }; 868 static const uint16_t packet_type_feature_packet_mask[] = { 869 0x0f00, // 3 slot packets 870 0xf000, // 5 slot packets 871 0x1102, // EDR 2 mpbs 872 0x2204, // EDR 3 mbps 873 0x0300, // 3 slot EDR packts 874 0x3000, // 5 slot EDR packet 875 }; 876 877 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 878 // enable packet types based on size 879 uint16_t packet_types = 0; 880 unsigned int i; 881 for (i=0;i<16;i++){ 882 if (packet_type_sizes[i] == 0) continue; 883 if (packet_type_sizes[i] <= buffer_size){ 884 packet_types |= 1 << i; 885 } 886 } 887 // disable packet types due to missing local supported features 888 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 889 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 890 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 891 if (feature_set) continue; 892 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 893 packet_types &= ~packet_type_feature_packet_mask[i]; 894 } 895 // flip bits for "may not be used" 896 packet_types ^= 0x3306; 897 return packet_types; 898 } 899 900 uint16_t hci_usable_acl_packet_types(void){ 901 return hci_stack->packet_types; 902 } 903 #endif 904 905 uint8_t* hci_get_outgoing_packet_buffer(void){ 906 // hci packet buffer is >= acl data packet length 907 return hci_stack->hci_packet_buffer; 908 } 909 910 uint16_t hci_max_acl_data_packet_length(void){ 911 return hci_stack->acl_data_packet_length; 912 } 913 914 #ifdef ENABLE_CLASSIC 915 int hci_extended_sco_link_supported(void){ 916 // No. 31, byte 3, bit 7 917 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 918 } 919 #endif 920 921 int hci_non_flushable_packet_boundary_flag_supported(void){ 922 // No. 54, byte 6, bit 6 923 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 924 } 925 926 static int gap_ssp_supported(void){ 927 // No. 51, byte 6, bit 3 928 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 929 } 930 931 static int hci_classic_supported(void){ 932 #ifdef ENABLE_CLASSIC 933 // No. 37, byte 4, bit 5, = No BR/EDR Support 934 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 935 #else 936 return 0; 937 #endif 938 } 939 940 static int hci_le_supported(void){ 941 #ifdef ENABLE_BLE 942 // No. 37, byte 4, bit 6 = LE Supported (Controller) 943 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 944 #else 945 return 0; 946 #endif 947 } 948 949 #ifdef ENABLE_BLE 950 951 /** 952 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 953 */ 954 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 955 *addr_type = hci_stack->le_own_addr_type; 956 if (hci_stack->le_own_addr_type){ 957 memcpy(addr, hci_stack->le_random_address, 6); 958 } else { 959 memcpy(addr, hci_stack->local_bd_addr, 6); 960 } 961 } 962 963 #ifdef ENABLE_LE_CENTRAL 964 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 965 966 int offset = 3; 967 int num_reports = packet[offset]; 968 offset += 1; 969 970 int i; 971 // log_info("HCI: handle adv report with num reports: %d", num_reports); 972 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 973 for (i=0; i<num_reports && offset < size;i++){ 974 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 975 uint8_t event_size = 10 + data_length; 976 int pos = 0; 977 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 978 event[pos++] = event_size; 979 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 980 offset += 8; 981 pos += 8; 982 event[pos++] = packet[offset + 1 + data_length]; // rssi 983 event[pos++] = packet[offset++]; //data_length; 984 memcpy(&event[pos], &packet[offset], data_length); 985 pos += data_length; 986 offset += data_length + 1; // rssi 987 hci_emit_event(event, pos, 1); 988 } 989 } 990 #endif 991 #endif 992 993 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 994 995 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 996 if (!hci_stack->config) return 0; 997 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 998 // Limit baud rate for Broadcom chipsets to 3 mbps 999 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1000 baud_rate = 3000000; 1001 } 1002 return baud_rate; 1003 } 1004 1005 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1006 UNUSED(ds); 1007 1008 switch (hci_stack->substate){ 1009 case HCI_INIT_W4_SEND_RESET: 1010 log_info("Resend HCI Reset"); 1011 hci_stack->substate = HCI_INIT_SEND_RESET; 1012 hci_stack->num_cmd_packets = 1; 1013 hci_run(); 1014 break; 1015 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1016 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1017 if (hci_stack->hci_transport->reset_link){ 1018 hci_stack->hci_transport->reset_link(); 1019 } 1020 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1021 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1022 log_info("Resend HCI Reset - CSR Warm Boot"); 1023 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1024 hci_stack->num_cmd_packets = 1; 1025 hci_run(); 1026 break; 1027 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1028 if (hci_stack->hci_transport->set_baudrate){ 1029 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1030 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1031 hci_stack->hci_transport->set_baudrate(baud_rate); 1032 } 1033 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1034 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1035 if (hci_stack->hci_transport->reset_link){ 1036 log_info("Link Reset"); 1037 hci_stack->hci_transport->reset_link(); 1038 } 1039 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1040 hci_run(); 1041 } 1042 break; 1043 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1044 // otherwise continue 1045 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1046 hci_send_cmd(&hci_read_local_supported_commands); 1047 break; 1048 default: 1049 break; 1050 } 1051 } 1052 #endif 1053 1054 static void hci_initializing_next_state(void){ 1055 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1056 } 1057 1058 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1059 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1060 const int bd_addr_string_len = 17; 1061 int i = 0; 1062 while (i < size - bd_addr_string_len){ 1063 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1064 i++; 1065 continue; 1066 } 1067 // set real address 1068 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1069 i += bd_addr_string_len; 1070 } 1071 } 1072 #endif 1073 1074 // assumption: hci_can_send_command_packet_now() == true 1075 static void hci_initializing_run(void){ 1076 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1077 switch (hci_stack->substate){ 1078 case HCI_INIT_SEND_RESET: 1079 hci_state_reset(); 1080 1081 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1082 // prepare reset if command complete not received in 100ms 1083 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1084 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1085 btstack_run_loop_add_timer(&hci_stack->timeout); 1086 #endif 1087 // send command 1088 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1089 hci_send_cmd(&hci_reset); 1090 break; 1091 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1092 hci_send_cmd(&hci_read_local_version_information); 1093 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1094 break; 1095 case HCI_INIT_SEND_READ_LOCAL_NAME: 1096 hci_send_cmd(&hci_read_local_name); 1097 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1098 break; 1099 1100 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1101 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1102 hci_state_reset(); 1103 // prepare reset if command complete not received in 100ms 1104 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1105 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1106 btstack_run_loop_add_timer(&hci_stack->timeout); 1107 // send command 1108 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1109 hci_send_cmd(&hci_reset); 1110 break; 1111 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1112 hci_state_reset(); 1113 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1114 hci_send_cmd(&hci_reset); 1115 break; 1116 case HCI_INIT_SEND_BAUD_CHANGE: { 1117 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1118 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1119 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1120 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1121 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1122 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1123 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1124 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1125 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1126 btstack_run_loop_add_timer(&hci_stack->timeout); 1127 } 1128 break; 1129 } 1130 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1131 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1132 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1133 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1134 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1135 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1136 break; 1137 } 1138 case HCI_INIT_CUSTOM_INIT: 1139 // Custom initialization 1140 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1141 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1142 if (valid_cmd){ 1143 int size = 3 + hci_stack->hci_packet_buffer[2]; 1144 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1145 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1146 switch (valid_cmd) { 1147 case 1: 1148 default: 1149 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1150 break; 1151 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1152 log_info("CSR Warm Boot"); 1153 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1154 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1155 btstack_run_loop_add_timer(&hci_stack->timeout); 1156 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1157 && hci_stack->config 1158 && hci_stack->chipset 1159 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1160 && hci_stack->hci_transport->set_baudrate 1161 && hci_transport_uart_get_main_baud_rate()){ 1162 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1163 } else { 1164 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1165 } 1166 break; 1167 } 1168 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1169 break; 1170 } 1171 log_info("Init script done"); 1172 1173 // Init script download on Broadcom chipsets causes: 1174 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1175 // - baud rate to reset, restore UART baud rate if needed 1176 int need_baud_change = hci_stack->config 1177 && hci_stack->chipset 1178 && hci_stack->chipset->set_baudrate_command 1179 && hci_stack->hci_transport->set_baudrate 1180 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1181 if (need_baud_change) { 1182 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1183 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1184 hci_stack->hci_transport->set_baudrate(baud_rate); 1185 } 1186 1187 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1188 // -> Work around: wait a few milliseconds here. 1189 log_info("BCM delay after init script"); 1190 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1191 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1192 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1193 btstack_run_loop_add_timer(&hci_stack->timeout); 1194 break; 1195 } 1196 } 1197 // otherwise continue 1198 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1199 hci_send_cmd(&hci_read_local_supported_commands); 1200 break; 1201 case HCI_INIT_SET_BD_ADDR: 1202 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1203 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1204 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1205 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1206 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1207 break; 1208 #endif 1209 1210 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1211 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1212 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1213 hci_send_cmd(&hci_read_local_supported_commands); 1214 break; 1215 case HCI_INIT_READ_BD_ADDR: 1216 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1217 hci_send_cmd(&hci_read_bd_addr); 1218 break; 1219 case HCI_INIT_READ_BUFFER_SIZE: 1220 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1221 hci_send_cmd(&hci_read_buffer_size); 1222 break; 1223 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1224 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1225 hci_send_cmd(&hci_read_local_supported_features); 1226 break; 1227 1228 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1229 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1230 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1231 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1232 break; 1233 case HCI_INIT_HOST_BUFFER_SIZE: 1234 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1235 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1236 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1237 break; 1238 #endif 1239 1240 case HCI_INIT_SET_EVENT_MASK: 1241 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1242 if (hci_le_supported()){ 1243 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1244 } else { 1245 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1246 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1247 } 1248 break; 1249 1250 #ifdef ENABLE_CLASSIC 1251 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1252 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1253 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1254 break; 1255 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1256 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1257 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1258 break; 1259 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1260 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1261 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1262 break; 1263 case HCI_INIT_WRITE_LOCAL_NAME: { 1264 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1265 hci_reserve_packet_buffer(); 1266 uint8_t * packet = hci_stack->hci_packet_buffer; 1267 // construct HCI Command and send 1268 uint16_t opcode = hci_write_local_name.opcode; 1269 hci_stack->last_cmd_opcode = opcode; 1270 packet[0] = opcode & 0xff; 1271 packet[1] = opcode >> 8; 1272 packet[2] = DEVICE_NAME_LEN; 1273 memset(&packet[3], 0, DEVICE_NAME_LEN); 1274 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1275 // expand '00:00:00:00:00:00' in name with bd_addr 1276 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1277 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1278 break; 1279 } 1280 case HCI_INIT_WRITE_EIR_DATA: { 1281 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1282 hci_reserve_packet_buffer(); 1283 uint8_t * packet = hci_stack->hci_packet_buffer; 1284 // construct HCI Command and send 1285 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1286 hci_stack->last_cmd_opcode = opcode; 1287 packet[0] = opcode & 0xff; 1288 packet[1] = opcode >> 8; 1289 packet[2] = 1 + 240; 1290 packet[3] = 0; // FEC not required 1291 if (hci_stack->eir_data){ 1292 memcpy(&packet[4], hci_stack->eir_data, 240); 1293 } else { 1294 memset(&packet[4], 0, 240); 1295 int name_len = strlen(hci_stack->local_name); 1296 packet[4] = name_len + 1; 1297 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1298 memcpy(&packet[6], hci_stack->local_name, name_len); 1299 } 1300 // expand '00:00:00:00:00:00' in name with bd_addr 1301 hci_replace_bd_addr_placeholder(&packet[4], 240); 1302 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1303 break; 1304 } 1305 case HCI_INIT_WRITE_INQUIRY_MODE: 1306 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1307 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1308 break; 1309 case HCI_INIT_WRITE_SCAN_ENABLE: 1310 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1311 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1312 break; 1313 // only sent if ENABLE_SCO_OVER_HCI is defined 1314 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1315 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1316 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1317 break; 1318 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1319 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1320 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1321 break; 1322 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1323 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1324 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1325 log_info("BCM: Route SCO data via HCI transport"); 1326 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1327 break; 1328 1329 #endif 1330 #ifdef ENABLE_BLE 1331 // LE INIT 1332 case HCI_INIT_LE_READ_BUFFER_SIZE: 1333 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1334 hci_send_cmd(&hci_le_read_buffer_size); 1335 break; 1336 case HCI_INIT_LE_SET_EVENT_MASK: 1337 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1338 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1339 break; 1340 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1341 // LE Supported Host = 1, Simultaneous Host = 0 1342 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1343 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1344 break; 1345 #endif 1346 1347 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1348 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1349 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1350 hci_send_cmd(&hci_le_read_maximum_data_length); 1351 break; 1352 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1353 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1354 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1355 break; 1356 #endif 1357 1358 #ifdef ENABLE_LE_CENTRAL 1359 case HCI_INIT_READ_WHITE_LIST_SIZE: 1360 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1361 hci_send_cmd(&hci_le_read_white_list_size); 1362 break; 1363 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1364 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1365 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1366 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1367 break; 1368 #endif 1369 default: 1370 return; 1371 } 1372 } 1373 1374 static void hci_init_done(void){ 1375 // done. tell the app 1376 log_info("hci_init_done -> HCI_STATE_WORKING"); 1377 hci_stack->state = HCI_STATE_WORKING; 1378 hci_emit_state(); 1379 hci_run(); 1380 } 1381 1382 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1383 1384 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1385 1386 uint8_t command_completed = 0; 1387 1388 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1389 uint16_t opcode = little_endian_read_16(packet,3); 1390 if (opcode == hci_stack->last_cmd_opcode){ 1391 command_completed = 1; 1392 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1393 } else { 1394 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1395 } 1396 } 1397 1398 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1399 uint8_t status = packet[2]; 1400 uint16_t opcode = little_endian_read_16(packet,4); 1401 if (opcode == hci_stack->last_cmd_opcode){ 1402 if (status){ 1403 command_completed = 1; 1404 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1405 } else { 1406 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1407 } 1408 } else { 1409 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1410 } 1411 } 1412 1413 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1414 1415 // Vendor == CSR 1416 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1417 // TODO: track actual command 1418 command_completed = 1; 1419 } 1420 1421 // Vendor == Toshiba 1422 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1423 // TODO: track actual command 1424 command_completed = 1; 1425 } 1426 1427 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1428 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1429 // 1430 // HCI Reset 1431 // Timeout 100 ms 1432 // HCI Reset 1433 // Command Complete Reset 1434 // HCI Read Local Version Information 1435 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1436 // hang... 1437 // 1438 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1439 if (!command_completed 1440 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1441 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1442 1443 uint16_t opcode = little_endian_read_16(packet,3); 1444 if (opcode == hci_reset.opcode){ 1445 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1446 return; 1447 } 1448 } 1449 1450 // CSR & H5 1451 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1452 if (!command_completed 1453 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1454 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1455 1456 uint16_t opcode = little_endian_read_16(packet,3); 1457 if (opcode == hci_reset.opcode){ 1458 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1459 return; 1460 } 1461 } 1462 1463 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1464 // fix: Correct substate and behave as command below 1465 if (command_completed){ 1466 switch (hci_stack->substate){ 1467 case HCI_INIT_SEND_RESET: 1468 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1469 break; 1470 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1471 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1472 break; 1473 default: 1474 break; 1475 } 1476 } 1477 1478 #endif 1479 1480 if (!command_completed) return; 1481 1482 int need_baud_change = 0; 1483 int need_addr_change = 0; 1484 1485 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1486 need_baud_change = hci_stack->config 1487 && hci_stack->chipset 1488 && hci_stack->chipset->set_baudrate_command 1489 && hci_stack->hci_transport->set_baudrate 1490 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1491 1492 need_addr_change = hci_stack->custom_bd_addr_set 1493 && hci_stack->chipset 1494 && hci_stack->chipset->set_bd_addr_command; 1495 #endif 1496 1497 switch(hci_stack->substate){ 1498 1499 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1500 case HCI_INIT_SEND_RESET: 1501 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1502 // fix: just correct substate and behave as command below 1503 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1504 btstack_run_loop_remove_timer(&hci_stack->timeout); 1505 break; 1506 case HCI_INIT_W4_SEND_RESET: 1507 btstack_run_loop_remove_timer(&hci_stack->timeout); 1508 break; 1509 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1510 log_info("Received local name, need baud change %d", need_baud_change); 1511 if (need_baud_change){ 1512 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1513 return; 1514 } 1515 // skip baud change 1516 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1517 return; 1518 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1519 // for STLC2500D, baud rate change already happened. 1520 // for others, baud rate gets changed now 1521 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1522 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1523 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1524 hci_stack->hci_transport->set_baudrate(baud_rate); 1525 } 1526 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1527 return; 1528 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1529 btstack_run_loop_remove_timer(&hci_stack->timeout); 1530 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1531 return; 1532 case HCI_INIT_W4_CUSTOM_INIT: 1533 // repeat custom init 1534 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1535 return; 1536 #else 1537 case HCI_INIT_W4_SEND_RESET: 1538 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1539 return ; 1540 #endif 1541 1542 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1543 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1544 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1545 return; 1546 } 1547 if (need_addr_change){ 1548 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1549 return; 1550 } 1551 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1552 return; 1553 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1554 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1555 if (need_baud_change){ 1556 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1557 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1558 hci_stack->hci_transport->set_baudrate(baud_rate); 1559 } 1560 if (need_addr_change){ 1561 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1562 return; 1563 } 1564 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1565 return; 1566 case HCI_INIT_W4_SET_BD_ADDR: 1567 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1568 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1569 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1570 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1571 return; 1572 } 1573 // skipping st warm boot 1574 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1575 return; 1576 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1577 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1578 return; 1579 #endif 1580 case HCI_INIT_W4_READ_BD_ADDR: 1581 // only read buffer size if supported 1582 if (hci_stack->local_supported_commands[0] & 0x01) { 1583 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1584 return; 1585 } 1586 // skipping read buffer size 1587 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1588 return; 1589 case HCI_INIT_W4_SET_EVENT_MASK: 1590 // skip Classic init commands for LE only chipsets 1591 if (!hci_classic_supported()){ 1592 #ifdef ENABLE_BLE 1593 if (hci_le_supported()){ 1594 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1595 return; 1596 } 1597 #endif 1598 log_error("Neither BR/EDR nor LE supported"); 1599 hci_init_done(); 1600 return; 1601 } 1602 if (!gap_ssp_supported()){ 1603 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1604 return; 1605 } 1606 break; 1607 #ifdef ENABLE_BLE 1608 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1609 // skip write le host if not supported (e.g. on LE only EM9301) 1610 if (hci_stack->local_supported_commands[0] & 0x02) break; 1611 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1612 return; 1613 1614 1615 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1616 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1617 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1618 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1619 return; 1620 } 1621 // explicit fall through to reduce repetitions 1622 #endif 1623 1624 #ifdef ENABLE_LE_CENTRAL 1625 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1626 #else 1627 hci_init_done(); 1628 #endif 1629 return; 1630 #endif 1631 1632 #ifdef ENABLE_SCO_OVER_HCI 1633 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1634 // skip write synchronous flow control if not supported 1635 if (hci_stack->local_supported_commands[0] & 0x04) break; 1636 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1637 // explicit fall through to reduce repetitions 1638 1639 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1640 // skip write default erroneous data reporting if not supported 1641 if (hci_stack->local_supported_commands[0] & 0x08) break; 1642 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1643 // explicit fall through to reduce repetitions 1644 1645 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1646 // skip bcm set sco pcm config on non-Broadcom chipsets 1647 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1648 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1649 // explicit fall through to reduce repetitions 1650 1651 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1652 if (!hci_le_supported()){ 1653 // SKIP LE init for Classic only configuration 1654 hci_init_done(); 1655 return; 1656 } 1657 break; 1658 1659 #else /* !ENABLE_SCO_OVER_HCI */ 1660 1661 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1662 #ifdef ENABLE_BLE 1663 if (hci_le_supported()){ 1664 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1665 return; 1666 } 1667 #endif 1668 // SKIP LE init for Classic only configuration 1669 hci_init_done(); 1670 return; 1671 #endif /* ENABLE_SCO_OVER_HCI */ 1672 1673 // Response to command before init done state -> init done 1674 case (HCI_INIT_DONE-1): 1675 hci_init_done(); 1676 return; 1677 1678 default: 1679 break; 1680 } 1681 hci_initializing_next_state(); 1682 } 1683 1684 static void event_handler(uint8_t *packet, int size){ 1685 1686 uint16_t event_length = packet[1]; 1687 1688 // assert packet is complete 1689 if (size != event_length + 2){ 1690 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1691 return; 1692 } 1693 1694 bd_addr_t addr; 1695 bd_addr_type_t addr_type; 1696 hci_con_handle_t handle; 1697 hci_connection_t * conn; 1698 int i; 1699 #ifdef ENABLE_CLASSIC 1700 uint8_t link_type; 1701 #endif 1702 1703 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1704 1705 switch (hci_event_packet_get_type(packet)) { 1706 1707 case HCI_EVENT_COMMAND_COMPLETE: 1708 // get num cmd packets - limit to 1 to reduce complexity 1709 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1710 1711 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1712 if (packet[5]) break; 1713 // terminate, name 248 chars 1714 packet[6+248] = 0; 1715 log_info("local name: %s", &packet[6]); 1716 } 1717 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1718 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1719 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1720 uint16_t acl_len = little_endian_read_16(packet, 6); 1721 uint16_t sco_len = packet[8]; 1722 1723 // determine usable ACL/SCO payload size 1724 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1725 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1726 1727 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1728 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1729 1730 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1731 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1732 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1733 } 1734 } 1735 #ifdef ENABLE_BLE 1736 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1737 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1738 hci_stack->le_acl_packets_total_num = packet[8]; 1739 // determine usable ACL payload size 1740 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1741 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1742 } 1743 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1744 } 1745 #endif 1746 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1747 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1748 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1749 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1750 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); 1751 } 1752 #endif 1753 #ifdef ENABLE_LE_CENTRAL 1754 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1755 hci_stack->le_whitelist_capacity = packet[6]; 1756 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1757 } 1758 #endif 1759 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1760 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1761 hci_stack->local_bd_addr); 1762 log_info("Local Address, Status: 0x%02x: Addr: %s", 1763 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1764 #ifdef ENABLE_CLASSIC 1765 if (hci_stack->link_key_db){ 1766 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1767 } 1768 #endif 1769 } 1770 #ifdef ENABLE_CLASSIC 1771 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1772 hci_emit_discoverable_enabled(hci_stack->discoverable); 1773 } 1774 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1775 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1776 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1777 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1778 hci_emit_event(event, sizeof(event), 1); 1779 } 1780 } 1781 #endif 1782 1783 // Note: HCI init checks 1784 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1785 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1786 1787 #ifdef ENABLE_CLASSIC 1788 // determine usable ACL packet types based on host buffer size and supported features 1789 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1790 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1791 #endif 1792 // Classic/LE 1793 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1794 } 1795 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1796 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1797 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1798 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1799 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1800 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1801 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1802 } 1803 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1804 hci_stack->local_supported_commands[0] = 1805 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1806 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1807 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1808 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1809 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1810 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1811 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1812 } 1813 #ifdef ENABLE_CLASSIC 1814 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1815 if (packet[5] == 0){ 1816 hci_stack->synchronous_flow_control_enabled = 1; 1817 } 1818 } 1819 #endif 1820 break; 1821 1822 case HCI_EVENT_COMMAND_STATUS: 1823 // get num cmd packets - limit to 1 to reduce complexity 1824 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1825 break; 1826 1827 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1828 int offset = 3; 1829 for (i=0; i<packet[2];i++){ 1830 handle = little_endian_read_16(packet, offset); 1831 offset += 2; 1832 uint16_t num_packets = little_endian_read_16(packet, offset); 1833 offset += 2; 1834 1835 conn = hci_connection_for_handle(handle); 1836 if (!conn){ 1837 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1838 continue; 1839 } 1840 1841 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1842 #ifdef ENABLE_CLASSIC 1843 if (conn->num_sco_packets_sent >= num_packets){ 1844 conn->num_sco_packets_sent -= num_packets; 1845 } else { 1846 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1847 conn->num_sco_packets_sent = 0; 1848 } 1849 hci_notify_if_sco_can_send_now(); 1850 #endif 1851 } else { 1852 if (conn->num_acl_packets_sent >= num_packets){ 1853 conn->num_acl_packets_sent -= num_packets; 1854 } else { 1855 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1856 conn->num_acl_packets_sent = 0; 1857 } 1858 } 1859 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1860 } 1861 break; 1862 } 1863 1864 #ifdef ENABLE_CLASSIC 1865 case HCI_EVENT_INQUIRY_COMPLETE: 1866 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1867 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1868 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1869 hci_emit_event(event, sizeof(event), 1); 1870 } 1871 break; 1872 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1873 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1874 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1875 } 1876 break; 1877 case HCI_EVENT_CONNECTION_REQUEST: 1878 reverse_bd_addr(&packet[2], addr); 1879 // TODO: eval COD 8-10 1880 link_type = packet[11]; 1881 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1882 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1883 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1884 if (!conn) { 1885 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1886 } 1887 if (!conn) { 1888 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1889 hci_stack->decline_reason = 0x0d; 1890 bd_addr_copy(hci_stack->decline_addr, addr); 1891 break; 1892 } 1893 conn->role = HCI_ROLE_SLAVE; 1894 conn->state = RECEIVED_CONNECTION_REQUEST; 1895 // store info about eSCO 1896 if (link_type == 0x02){ 1897 conn->remote_supported_feature_eSCO = 1; 1898 } 1899 hci_run(); 1900 break; 1901 1902 case HCI_EVENT_CONNECTION_COMPLETE: 1903 // Connection management 1904 reverse_bd_addr(&packet[5], addr); 1905 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1906 addr_type = BD_ADDR_TYPE_CLASSIC; 1907 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1908 if (conn) { 1909 if (!packet[2]){ 1910 conn->state = OPEN; 1911 conn->con_handle = little_endian_read_16(packet, 3); 1912 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1913 1914 // restart timer 1915 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1916 btstack_run_loop_add_timer(&conn->timeout); 1917 1918 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1919 1920 hci_emit_nr_connections_changed(); 1921 } else { 1922 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1923 uint8_t status = packet[2]; 1924 bd_addr_t bd_address; 1925 memcpy(&bd_address, conn->address, 6); 1926 1927 // connection failed, remove entry 1928 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1929 btstack_memory_hci_connection_free( conn ); 1930 1931 // notify client if dedicated bonding 1932 if (notify_dedicated_bonding_failed){ 1933 log_info("hci notify_dedicated_bonding_failed"); 1934 hci_emit_dedicated_bonding_result(bd_address, status); 1935 } 1936 1937 // if authentication error, also delete link key 1938 if (packet[2] == 0x05) { 1939 gap_drop_link_key_for_bd_addr(addr); 1940 } 1941 } 1942 } 1943 break; 1944 1945 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1946 reverse_bd_addr(&packet[5], addr); 1947 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1948 if (packet[2]){ 1949 // connection failed 1950 break; 1951 } 1952 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1953 if (!conn) { 1954 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1955 } 1956 if (!conn) { 1957 break; 1958 } 1959 conn->state = OPEN; 1960 conn->con_handle = little_endian_read_16(packet, 3); 1961 1962 #ifdef ENABLE_SCO_OVER_HCI 1963 // update SCO 1964 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1965 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1966 } 1967 #endif 1968 break; 1969 1970 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1971 handle = little_endian_read_16(packet, 3); 1972 conn = hci_connection_for_handle(handle); 1973 if (!conn) break; 1974 if (!packet[2]){ 1975 uint8_t * features = &packet[5]; 1976 if (features[6] & (1 << 3)){ 1977 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1978 } 1979 if (features[3] & (1<<7)){ 1980 conn->remote_supported_feature_eSCO = 1; 1981 } 1982 } 1983 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1984 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1985 if (conn->bonding_flags & BONDING_DEDICATED){ 1986 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1987 } 1988 break; 1989 1990 case HCI_EVENT_LINK_KEY_REQUEST: 1991 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1992 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1993 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1994 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1995 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1996 hci_run(); 1997 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1998 return; 1999 2000 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2001 reverse_bd_addr(&packet[2], addr); 2002 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2003 if (!conn) break; 2004 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2005 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2006 // Change Connection Encryption keeps link key type 2007 if (link_key_type != CHANGED_COMBINATION_KEY){ 2008 conn->link_key_type = link_key_type; 2009 } 2010 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2011 // still forward event to allow dismiss of pairing dialog 2012 break; 2013 } 2014 2015 case HCI_EVENT_PIN_CODE_REQUEST: 2016 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2017 // non-bondable mode: pin code negative reply will be sent 2018 if (!hci_stack->bondable){ 2019 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2020 hci_run(); 2021 return; 2022 } 2023 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2024 if (!hci_stack->link_key_db) break; 2025 hci_event_pin_code_request_get_bd_addr(packet, addr); 2026 hci_stack->link_key_db->delete_link_key(addr); 2027 break; 2028 2029 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2030 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2031 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2032 break; 2033 2034 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2035 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2036 if (!hci_stack->ssp_auto_accept) break; 2037 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2038 break; 2039 2040 case HCI_EVENT_USER_PASSKEY_REQUEST: 2041 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2042 if (!hci_stack->ssp_auto_accept) break; 2043 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2044 break; 2045 #endif 2046 2047 case HCI_EVENT_ENCRYPTION_CHANGE: 2048 handle = little_endian_read_16(packet, 3); 2049 conn = hci_connection_for_handle(handle); 2050 if (!conn) break; 2051 if (packet[2] == 0) { 2052 if (packet[5]){ 2053 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2054 } else { 2055 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2056 } 2057 } 2058 #ifdef ENABLE_CLASSIC 2059 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2060 #endif 2061 break; 2062 2063 #ifdef ENABLE_CLASSIC 2064 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2065 handle = little_endian_read_16(packet, 3); 2066 conn = hci_connection_for_handle(handle); 2067 if (!conn) break; 2068 2069 // dedicated bonding: send result and disconnect 2070 if (conn->bonding_flags & BONDING_DEDICATED){ 2071 conn->bonding_flags &= ~BONDING_DEDICATED; 2072 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2073 conn->bonding_status = packet[2]; 2074 break; 2075 } 2076 2077 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2078 // link key sufficient for requested security 2079 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2080 break; 2081 } 2082 // not enough 2083 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2084 break; 2085 #endif 2086 2087 // HCI_EVENT_DISCONNECTION_COMPLETE 2088 // has been split, to first notify stack before shutting connection down 2089 // see end of function, too. 2090 case HCI_EVENT_DISCONNECTION_COMPLETE: 2091 if (packet[2]) break; // status != 0 2092 handle = little_endian_read_16(packet, 3); 2093 // drop outgoing ACL fragments if it is for closed connection 2094 if (hci_stack->acl_fragmentation_total_size > 0) { 2095 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2096 log_info("hci: drop fragmented ACL data for closed connection"); 2097 hci_stack->acl_fragmentation_total_size = 0; 2098 hci_stack->acl_fragmentation_pos = 0; 2099 } 2100 } 2101 2102 // re-enable advertisements for le connections if active 2103 conn = hci_connection_for_handle(handle); 2104 if (!conn) break; 2105 #ifdef ENABLE_BLE 2106 #ifdef ENABLE_LE_PERIPHERAL 2107 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2108 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2109 } 2110 #endif 2111 #endif 2112 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2113 break; 2114 2115 case HCI_EVENT_HARDWARE_ERROR: 2116 log_error("Hardware Error: 0x%02x", packet[2]); 2117 if (hci_stack->hardware_error_callback){ 2118 (*hci_stack->hardware_error_callback)(packet[2]); 2119 } else { 2120 // if no special requests, just reboot stack 2121 hci_power_control_off(); 2122 hci_power_control_on(); 2123 } 2124 break; 2125 2126 #ifdef ENABLE_CLASSIC 2127 case HCI_EVENT_ROLE_CHANGE: 2128 if (packet[2]) break; // status != 0 2129 handle = little_endian_read_16(packet, 3); 2130 conn = hci_connection_for_handle(handle); 2131 if (!conn) break; // no conn 2132 conn->role = packet[9]; 2133 break; 2134 #endif 2135 2136 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2137 // release packet buffer only for asynchronous transport and if there are not further fragements 2138 if (hci_transport_synchronous()) { 2139 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2140 return; // instead of break: to avoid re-entering hci_run() 2141 } 2142 if (hci_stack->acl_fragmentation_total_size) break; 2143 hci_release_packet_buffer(); 2144 2145 // L2CAP receives this event via the hci_emit_event below 2146 2147 #ifdef ENABLE_CLASSIC 2148 // For SCO, we do the can_send_now_check here 2149 hci_notify_if_sco_can_send_now(); 2150 #endif 2151 break; 2152 2153 #ifdef ENABLE_CLASSIC 2154 case HCI_EVENT_SCO_CAN_SEND_NOW: 2155 // For SCO, we do the can_send_now_check here 2156 hci_notify_if_sco_can_send_now(); 2157 return; 2158 2159 // explode inquriy results for easier consumption 2160 case HCI_EVENT_INQUIRY_RESULT: 2161 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2162 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2163 gap_inquiry_explode(packet); 2164 break; 2165 #endif 2166 2167 #ifdef ENABLE_BLE 2168 case HCI_EVENT_LE_META: 2169 switch (packet[2]){ 2170 #ifdef ENABLE_LE_CENTRAL 2171 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2172 // log_info("advertising report received"); 2173 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2174 le_handle_advertisement_report(packet, size); 2175 break; 2176 #endif 2177 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2178 // Connection management 2179 reverse_bd_addr(&packet[8], addr); 2180 addr_type = (bd_addr_type_t)packet[7]; 2181 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2182 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2183 #ifdef ENABLE_LE_CENTRAL 2184 // if auto-connect, remove from whitelist in both roles 2185 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2186 hci_remove_from_whitelist(addr_type, addr); 2187 } 2188 // handle error: error is reported only to the initiator -> outgoing connection 2189 if (packet[3]){ 2190 // outgoing connection establishment is done 2191 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2192 // remove entry 2193 if (conn){ 2194 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2195 btstack_memory_hci_connection_free( conn ); 2196 } 2197 break; 2198 } 2199 #endif 2200 // on success, both hosts receive connection complete event 2201 if (packet[6] == HCI_ROLE_MASTER){ 2202 #ifdef ENABLE_LE_CENTRAL 2203 // if we're master, it was an outgoing connection and we're done with it 2204 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2205 #endif 2206 } else { 2207 #ifdef ENABLE_LE_PERIPHERAL 2208 // if we're slave, it was an incoming connection, advertisements have stopped 2209 hci_stack->le_advertisements_active = 0; 2210 // try to re-enable them 2211 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2212 #endif 2213 } 2214 // LE connections are auto-accepted, so just create a connection if there isn't one already 2215 if (!conn){ 2216 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2217 } 2218 // no memory, sorry. 2219 if (!conn){ 2220 break; 2221 } 2222 2223 conn->state = OPEN; 2224 conn->role = packet[6]; 2225 conn->con_handle = little_endian_read_16(packet, 4); 2226 2227 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2228 2229 // restart timer 2230 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2231 // btstack_run_loop_add_timer(&conn->timeout); 2232 2233 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2234 2235 hci_emit_nr_connections_changed(); 2236 break; 2237 2238 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2239 2240 default: 2241 break; 2242 } 2243 break; 2244 #endif 2245 default: 2246 break; 2247 } 2248 2249 // handle BT initialization 2250 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2251 hci_initializing_event_handler(packet, size); 2252 } 2253 2254 // help with BT sleep 2255 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2256 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2257 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2258 hci_initializing_next_state(); 2259 } 2260 2261 // notify upper stack 2262 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2263 2264 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2265 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2266 if (!packet[2]){ 2267 handle = little_endian_read_16(packet, 3); 2268 hci_connection_t * aConn = hci_connection_for_handle(handle); 2269 if (aConn) { 2270 uint8_t status = aConn->bonding_status; 2271 uint16_t flags = aConn->bonding_flags; 2272 bd_addr_t bd_address; 2273 memcpy(&bd_address, aConn->address, 6); 2274 hci_shutdown_connection(aConn); 2275 // connection struct is gone, don't access anymore 2276 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2277 hci_emit_dedicated_bonding_result(bd_address, status); 2278 } 2279 } 2280 } 2281 } 2282 2283 // execute main loop 2284 hci_run(); 2285 } 2286 2287 #ifdef ENABLE_CLASSIC 2288 static void sco_handler(uint8_t * packet, uint16_t size){ 2289 if (!hci_stack->sco_packet_handler) return; 2290 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2291 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2292 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2293 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2294 if (conn){ 2295 conn->num_packets_completed++; 2296 hci_stack->host_completed_packets = 1; 2297 hci_run(); 2298 } 2299 #endif 2300 } 2301 #endif 2302 2303 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2304 hci_dump_packet(packet_type, 1, packet, size); 2305 switch (packet_type) { 2306 case HCI_EVENT_PACKET: 2307 event_handler(packet, size); 2308 break; 2309 case HCI_ACL_DATA_PACKET: 2310 acl_handler(packet, size); 2311 break; 2312 #ifdef ENABLE_CLASSIC 2313 case HCI_SCO_DATA_PACKET: 2314 sco_handler(packet, size); 2315 break; 2316 #endif 2317 default: 2318 break; 2319 } 2320 } 2321 2322 /** 2323 * @brief Add event packet handler. 2324 */ 2325 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2326 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2327 } 2328 2329 2330 /** Register HCI packet handlers */ 2331 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2332 hci_stack->acl_packet_handler = handler; 2333 } 2334 2335 #ifdef ENABLE_CLASSIC 2336 /** 2337 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2338 */ 2339 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2340 hci_stack->sco_packet_handler = handler; 2341 } 2342 #endif 2343 2344 static void hci_state_reset(void){ 2345 // no connections yet 2346 hci_stack->connections = NULL; 2347 2348 // keep discoverable/connectable as this has been requested by the client(s) 2349 // hci_stack->discoverable = 0; 2350 // hci_stack->connectable = 0; 2351 // hci_stack->bondable = 1; 2352 // hci_stack->own_addr_type = 0; 2353 2354 // buffer is free 2355 hci_stack->hci_packet_buffer_reserved = 0; 2356 2357 // no pending cmds 2358 hci_stack->decline_reason = 0; 2359 hci_stack->new_scan_enable_value = 0xff; 2360 2361 // LE 2362 #ifdef ENABLE_BLE 2363 memset(hci_stack->le_random_address, 0, 6); 2364 hci_stack->le_random_address_set = 0; 2365 #endif 2366 #ifdef ENABLE_LE_CENTRAL 2367 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2368 hci_stack->le_scan_type = 0xff; 2369 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2370 hci_stack->le_whitelist = 0; 2371 hci_stack->le_whitelist_capacity = 0; 2372 #endif 2373 } 2374 2375 #ifdef ENABLE_CLASSIC 2376 /** 2377 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2378 */ 2379 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2380 // store and open remote device db 2381 hci_stack->link_key_db = link_key_db; 2382 if (hci_stack->link_key_db) { 2383 hci_stack->link_key_db->open(); 2384 } 2385 } 2386 #endif 2387 2388 void hci_init(const hci_transport_t *transport, const void *config){ 2389 2390 #ifdef HAVE_MALLOC 2391 if (!hci_stack) { 2392 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2393 } 2394 #else 2395 hci_stack = &hci_stack_static; 2396 #endif 2397 memset(hci_stack, 0, sizeof(hci_stack_t)); 2398 2399 // reference to use transport layer implementation 2400 hci_stack->hci_transport = transport; 2401 2402 // reference to used config 2403 hci_stack->config = config; 2404 2405 // setup pointer for outgoing packet buffer 2406 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2407 2408 // max acl payload size defined in config.h 2409 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2410 2411 // register packet handlers with transport 2412 transport->register_packet_handler(&packet_handler); 2413 2414 hci_stack->state = HCI_STATE_OFF; 2415 2416 // class of device 2417 hci_stack->class_of_device = 0x007a020c; // Smartphone 2418 2419 // bondable by default 2420 hci_stack->bondable = 1; 2421 2422 #ifdef ENABLE_CLASSIC 2423 // classic name 2424 hci_stack->local_name = default_classic_name; 2425 #endif 2426 2427 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2428 hci_stack->ssp_enable = 1; 2429 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2430 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2431 hci_stack->ssp_auto_accept = 1; 2432 2433 // voice setting - signed 16 bit pcm data with CVSD over the air 2434 hci_stack->sco_voice_setting = 0x60; 2435 2436 #ifdef ENABLE_LE_CENTRAL 2437 // connection parameter to use for outgoing connections 2438 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2439 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2440 hci_stack->le_connection_latency = 4; // 4 2441 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2442 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2443 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2444 #endif 2445 2446 // connection parameter range used to answer connection parameter update requests in l2cap 2447 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2448 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2449 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2450 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2451 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2452 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2453 2454 hci_state_reset(); 2455 } 2456 2457 /** 2458 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2459 */ 2460 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2461 hci_stack->chipset = chipset_driver; 2462 2463 // reset chipset driver - init is also called on power_up 2464 if (hci_stack->chipset && hci_stack->chipset->init){ 2465 hci_stack->chipset->init(hci_stack->config); 2466 } 2467 } 2468 2469 /** 2470 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2471 */ 2472 void hci_set_control(const btstack_control_t *hardware_control){ 2473 // references to used control implementation 2474 hci_stack->control = hardware_control; 2475 // init with transport config 2476 hardware_control->init(hci_stack->config); 2477 } 2478 2479 void hci_close(void){ 2480 // close remote device db 2481 if (hci_stack->link_key_db) { 2482 hci_stack->link_key_db->close(); 2483 } 2484 2485 btstack_linked_list_iterator_t lit; 2486 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2487 while (btstack_linked_list_iterator_has_next(&lit)){ 2488 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2489 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2490 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2491 hci_shutdown_connection(connection); 2492 } 2493 2494 hci_power_control(HCI_POWER_OFF); 2495 2496 #ifdef HAVE_MALLOC 2497 free(hci_stack); 2498 #endif 2499 hci_stack = NULL; 2500 } 2501 2502 #ifdef ENABLE_CLASSIC 2503 void gap_set_class_of_device(uint32_t class_of_device){ 2504 hci_stack->class_of_device = class_of_device; 2505 } 2506 2507 void hci_disable_l2cap_timeout_check(void){ 2508 disable_l2cap_timeouts = 1; 2509 } 2510 #endif 2511 2512 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2513 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2514 void hci_set_bd_addr(bd_addr_t addr){ 2515 memcpy(hci_stack->custom_bd_addr, addr, 6); 2516 hci_stack->custom_bd_addr_set = 1; 2517 } 2518 #endif 2519 2520 // State-Module-Driver overview 2521 // state module low-level 2522 // HCI_STATE_OFF off close 2523 // HCI_STATE_INITIALIZING, on open 2524 // HCI_STATE_WORKING, on open 2525 // HCI_STATE_HALTING, on open 2526 // HCI_STATE_SLEEPING, off/sleep close 2527 // HCI_STATE_FALLING_ASLEEP on open 2528 2529 static int hci_power_control_on(void){ 2530 2531 // power on 2532 int err = 0; 2533 if (hci_stack->control && hci_stack->control->on){ 2534 err = (*hci_stack->control->on)(); 2535 } 2536 if (err){ 2537 log_error( "POWER_ON failed"); 2538 hci_emit_hci_open_failed(); 2539 return err; 2540 } 2541 2542 // int chipset driver 2543 if (hci_stack->chipset && hci_stack->chipset->init){ 2544 hci_stack->chipset->init(hci_stack->config); 2545 } 2546 2547 // init transport 2548 if (hci_stack->hci_transport->init){ 2549 hci_stack->hci_transport->init(hci_stack->config); 2550 } 2551 2552 // open transport 2553 err = hci_stack->hci_transport->open(); 2554 if (err){ 2555 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2556 if (hci_stack->control && hci_stack->control->off){ 2557 (*hci_stack->control->off)(); 2558 } 2559 hci_emit_hci_open_failed(); 2560 return err; 2561 } 2562 return 0; 2563 } 2564 2565 static void hci_power_control_off(void){ 2566 2567 log_info("hci_power_control_off"); 2568 2569 // close low-level device 2570 hci_stack->hci_transport->close(); 2571 2572 log_info("hci_power_control_off - hci_transport closed"); 2573 2574 // power off 2575 if (hci_stack->control && hci_stack->control->off){ 2576 (*hci_stack->control->off)(); 2577 } 2578 2579 log_info("hci_power_control_off - control closed"); 2580 2581 hci_stack->state = HCI_STATE_OFF; 2582 } 2583 2584 static void hci_power_control_sleep(void){ 2585 2586 log_info("hci_power_control_sleep"); 2587 2588 #if 0 2589 // don't close serial port during sleep 2590 2591 // close low-level device 2592 hci_stack->hci_transport->close(hci_stack->config); 2593 #endif 2594 2595 // sleep mode 2596 if (hci_stack->control && hci_stack->control->sleep){ 2597 (*hci_stack->control->sleep)(); 2598 } 2599 2600 hci_stack->state = HCI_STATE_SLEEPING; 2601 } 2602 2603 static int hci_power_control_wake(void){ 2604 2605 log_info("hci_power_control_wake"); 2606 2607 // wake on 2608 if (hci_stack->control && hci_stack->control->wake){ 2609 (*hci_stack->control->wake)(); 2610 } 2611 2612 #if 0 2613 // open low-level device 2614 int err = hci_stack->hci_transport->open(hci_stack->config); 2615 if (err){ 2616 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2617 if (hci_stack->control && hci_stack->control->off){ 2618 (*hci_stack->control->off)(); 2619 } 2620 hci_emit_hci_open_failed(); 2621 return err; 2622 } 2623 #endif 2624 2625 return 0; 2626 } 2627 2628 static void hci_power_transition_to_initializing(void){ 2629 // set up state machine 2630 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2631 hci_stack->hci_packet_buffer_reserved = 0; 2632 hci_stack->state = HCI_STATE_INITIALIZING; 2633 hci_stack->substate = HCI_INIT_SEND_RESET; 2634 } 2635 2636 int hci_power_control(HCI_POWER_MODE power_mode){ 2637 2638 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2639 2640 int err = 0; 2641 switch (hci_stack->state){ 2642 2643 case HCI_STATE_OFF: 2644 switch (power_mode){ 2645 case HCI_POWER_ON: 2646 err = hci_power_control_on(); 2647 if (err) { 2648 log_error("hci_power_control_on() error %d", err); 2649 return err; 2650 } 2651 hci_power_transition_to_initializing(); 2652 break; 2653 case HCI_POWER_OFF: 2654 // do nothing 2655 break; 2656 case HCI_POWER_SLEEP: 2657 // do nothing (with SLEEP == OFF) 2658 break; 2659 } 2660 break; 2661 2662 case HCI_STATE_INITIALIZING: 2663 switch (power_mode){ 2664 case HCI_POWER_ON: 2665 // do nothing 2666 break; 2667 case HCI_POWER_OFF: 2668 // no connections yet, just turn it off 2669 hci_power_control_off(); 2670 break; 2671 case HCI_POWER_SLEEP: 2672 // no connections yet, just turn it off 2673 hci_power_control_sleep(); 2674 break; 2675 } 2676 break; 2677 2678 case HCI_STATE_WORKING: 2679 switch (power_mode){ 2680 case HCI_POWER_ON: 2681 // do nothing 2682 break; 2683 case HCI_POWER_OFF: 2684 // see hci_run 2685 hci_stack->state = HCI_STATE_HALTING; 2686 break; 2687 case HCI_POWER_SLEEP: 2688 // see hci_run 2689 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2690 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2691 break; 2692 } 2693 break; 2694 2695 case HCI_STATE_HALTING: 2696 switch (power_mode){ 2697 case HCI_POWER_ON: 2698 hci_power_transition_to_initializing(); 2699 break; 2700 case HCI_POWER_OFF: 2701 // do nothing 2702 break; 2703 case HCI_POWER_SLEEP: 2704 // see hci_run 2705 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2706 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2707 break; 2708 } 2709 break; 2710 2711 case HCI_STATE_FALLING_ASLEEP: 2712 switch (power_mode){ 2713 case HCI_POWER_ON: 2714 2715 #ifdef HAVE_PLATFORM_IPHONE_OS 2716 // nothing to do, if H4 supports power management 2717 if (btstack_control_iphone_power_management_enabled()){ 2718 hci_stack->state = HCI_STATE_INITIALIZING; 2719 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2720 break; 2721 } 2722 #endif 2723 hci_power_transition_to_initializing(); 2724 break; 2725 case HCI_POWER_OFF: 2726 // see hci_run 2727 hci_stack->state = HCI_STATE_HALTING; 2728 break; 2729 case HCI_POWER_SLEEP: 2730 // do nothing 2731 break; 2732 } 2733 break; 2734 2735 case HCI_STATE_SLEEPING: 2736 switch (power_mode){ 2737 case HCI_POWER_ON: 2738 2739 #ifdef HAVE_PLATFORM_IPHONE_OS 2740 // nothing to do, if H4 supports power management 2741 if (btstack_control_iphone_power_management_enabled()){ 2742 hci_stack->state = HCI_STATE_INITIALIZING; 2743 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2744 hci_update_scan_enable(); 2745 break; 2746 } 2747 #endif 2748 err = hci_power_control_wake(); 2749 if (err) return err; 2750 hci_power_transition_to_initializing(); 2751 break; 2752 case HCI_POWER_OFF: 2753 hci_stack->state = HCI_STATE_HALTING; 2754 break; 2755 case HCI_POWER_SLEEP: 2756 // do nothing 2757 break; 2758 } 2759 break; 2760 } 2761 2762 // create internal event 2763 hci_emit_state(); 2764 2765 // trigger next/first action 2766 hci_run(); 2767 2768 return 0; 2769 } 2770 2771 2772 #ifdef ENABLE_CLASSIC 2773 2774 static void hci_update_scan_enable(void){ 2775 // 2 = page scan, 1 = inq scan 2776 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2777 hci_run(); 2778 } 2779 2780 void gap_discoverable_control(uint8_t enable){ 2781 if (enable) enable = 1; // normalize argument 2782 2783 if (hci_stack->discoverable == enable){ 2784 hci_emit_discoverable_enabled(hci_stack->discoverable); 2785 return; 2786 } 2787 2788 hci_stack->discoverable = enable; 2789 hci_update_scan_enable(); 2790 } 2791 2792 void gap_connectable_control(uint8_t enable){ 2793 if (enable) enable = 1; // normalize argument 2794 2795 // don't emit event 2796 if (hci_stack->connectable == enable) return; 2797 2798 hci_stack->connectable = enable; 2799 hci_update_scan_enable(); 2800 } 2801 #endif 2802 2803 void gap_local_bd_addr(bd_addr_t address_buffer){ 2804 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2805 } 2806 2807 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2808 static void hci_host_num_completed_packets(void){ 2809 2810 // create packet manually as arrays are not supported and num_commands should not get reduced 2811 hci_reserve_packet_buffer(); 2812 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2813 2814 uint16_t size = 0; 2815 uint16_t num_handles = 0; 2816 packet[size++] = 0x35; 2817 packet[size++] = 0x0c; 2818 size++; // skip param len 2819 size++; // skip num handles 2820 2821 // add { handle, packets } entries 2822 btstack_linked_item_t * it; 2823 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2824 hci_connection_t * connection = (hci_connection_t *) it; 2825 if (connection->num_packets_completed){ 2826 little_endian_store_16(packet, size, connection->con_handle); 2827 size += 2; 2828 little_endian_store_16(packet, size, connection->num_packets_completed); 2829 size += 2; 2830 // 2831 num_handles++; 2832 connection->num_packets_completed = 0; 2833 } 2834 } 2835 2836 packet[2] = size - 3; 2837 packet[3] = num_handles; 2838 2839 hci_stack->host_completed_packets = 0; 2840 2841 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2842 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2843 2844 // release packet buffer for synchronous transport implementations 2845 if (hci_transport_synchronous()){ 2846 hci_stack->hci_packet_buffer_reserved = 0; 2847 } 2848 } 2849 #endif 2850 2851 static void hci_run(void){ 2852 2853 // log_info("hci_run: entered"); 2854 btstack_linked_item_t * it; 2855 2856 // send continuation fragments first, as they block the prepared packet buffer 2857 if (hci_stack->acl_fragmentation_total_size > 0) { 2858 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2859 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2860 if (connection) { 2861 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2862 hci_send_acl_packet_fragments(connection); 2863 return; 2864 } 2865 } else { 2866 // connection gone -> discard further fragments 2867 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2868 hci_stack->acl_fragmentation_total_size = 0; 2869 hci_stack->acl_fragmentation_pos = 0; 2870 } 2871 } 2872 2873 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2874 // send host num completed packets next as they don't require num_cmd_packets > 0 2875 if (!hci_can_send_comand_packet_transport()) return; 2876 if (hci_stack->host_completed_packets){ 2877 hci_host_num_completed_packets(); 2878 return; 2879 } 2880 #endif 2881 2882 if (!hci_can_send_command_packet_now()) return; 2883 2884 // global/non-connection oriented commands 2885 2886 #ifdef ENABLE_CLASSIC 2887 // decline incoming connections 2888 if (hci_stack->decline_reason){ 2889 uint8_t reason = hci_stack->decline_reason; 2890 hci_stack->decline_reason = 0; 2891 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2892 return; 2893 } 2894 // send scan enable 2895 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2896 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2897 hci_stack->new_scan_enable_value = 0xff; 2898 return; 2899 } 2900 // start/stop inquiry 2901 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2902 uint8_t duration = hci_stack->inquiry_state; 2903 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2904 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2905 return; 2906 } 2907 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2908 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2909 hci_send_cmd(&hci_inquiry_cancel); 2910 return; 2911 } 2912 // remote name request 2913 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2914 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2915 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2916 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2917 return; 2918 } 2919 // pairing 2920 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2921 uint8_t state = hci_stack->gap_pairing_state; 2922 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2923 switch (state){ 2924 case GAP_PAIRING_STATE_SEND_PIN: 2925 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2926 break; 2927 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2928 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2929 break; 2930 case GAP_PAIRING_STATE_SEND_PASSKEY: 2931 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2932 break; 2933 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2934 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2935 break; 2936 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2937 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2938 break; 2939 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2940 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2941 break; 2942 default: 2943 break; 2944 } 2945 return; 2946 } 2947 #endif 2948 2949 #ifdef ENABLE_BLE 2950 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2951 if ((hci_stack->state == HCI_STATE_WORKING) 2952 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2953 2954 #ifdef ENABLE_LE_CENTRAL 2955 // handle le scan 2956 switch(hci_stack->le_scanning_state){ 2957 case LE_START_SCAN: 2958 hci_stack->le_scanning_state = LE_SCANNING; 2959 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2960 return; 2961 2962 case LE_STOP_SCAN: 2963 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2964 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2965 return; 2966 default: 2967 break; 2968 } 2969 if (hci_stack->le_scan_type != 0xff){ 2970 // defaults: active scanning, accept all advertisement packets 2971 int scan_type = hci_stack->le_scan_type; 2972 hci_stack->le_scan_type = 0xff; 2973 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); 2974 return; 2975 } 2976 #endif 2977 #ifdef ENABLE_LE_PERIPHERAL 2978 // le advertisement control 2979 if (hci_stack->le_advertisements_todo){ 2980 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2981 } 2982 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2983 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2984 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2985 return; 2986 } 2987 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2988 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2989 hci_send_cmd(&hci_le_set_advertising_parameters, 2990 hci_stack->le_advertisements_interval_min, 2991 hci_stack->le_advertisements_interval_max, 2992 hci_stack->le_advertisements_type, 2993 hci_stack->le_own_addr_type, 2994 hci_stack->le_advertisements_direct_address_type, 2995 hci_stack->le_advertisements_direct_address, 2996 hci_stack->le_advertisements_channel_map, 2997 hci_stack->le_advertisements_filter_policy); 2998 return; 2999 } 3000 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3001 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3002 uint8_t adv_data_clean[31]; 3003 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3004 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3005 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3006 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3007 return; 3008 } 3009 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3010 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3011 uint8_t scan_data_clean[31]; 3012 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3013 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3014 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3015 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3016 return; 3017 } 3018 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3019 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3020 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3021 return; 3022 } 3023 #endif 3024 3025 #ifdef ENABLE_LE_CENTRAL 3026 // 3027 // LE Whitelist Management 3028 // 3029 3030 // check if whitelist needs modification 3031 btstack_linked_list_iterator_t lit; 3032 int modification_pending = 0; 3033 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3034 while (btstack_linked_list_iterator_has_next(&lit)){ 3035 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3036 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3037 modification_pending = 1; 3038 break; 3039 } 3040 } 3041 3042 if (modification_pending){ 3043 // stop connnecting if modification pending 3044 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3045 hci_send_cmd(&hci_le_create_connection_cancel); 3046 return; 3047 } 3048 3049 // add/remove entries 3050 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3051 while (btstack_linked_list_iterator_has_next(&lit)){ 3052 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3053 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3054 entry->state = LE_WHITELIST_ON_CONTROLLER; 3055 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3056 return; 3057 3058 } 3059 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3060 bd_addr_t address; 3061 bd_addr_type_t address_type = entry->address_type; 3062 memcpy(address, entry->address, 6); 3063 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3064 btstack_memory_whitelist_entry_free(entry); 3065 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3066 return; 3067 } 3068 } 3069 } 3070 3071 // start connecting 3072 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3073 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3074 bd_addr_t null_addr; 3075 memset(null_addr, 0, 6); 3076 hci_send_cmd(&hci_le_create_connection, 3077 0x0060, // scan interval: 60 ms 3078 0x0030, // scan interval: 30 ms 3079 1, // use whitelist 3080 0, // peer address type 3081 null_addr, // peer bd addr 3082 hci_stack->le_own_addr_type, // our addr type: 3083 hci_stack->le_connection_interval_min, // conn interval min 3084 hci_stack->le_connection_interval_max, // conn interval max 3085 hci_stack->le_connection_latency, // conn latency 3086 hci_stack->le_supervision_timeout, // conn latency 3087 hci_stack->le_minimum_ce_length, // min ce length 3088 hci_stack->le_maximum_ce_length // max ce length 3089 ); 3090 return; 3091 } 3092 #endif 3093 } 3094 #endif 3095 3096 // send pending HCI commands 3097 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3098 hci_connection_t * connection = (hci_connection_t *) it; 3099 3100 switch(connection->state){ 3101 case SEND_CREATE_CONNECTION: 3102 switch(connection->address_type){ 3103 #ifdef ENABLE_CLASSIC 3104 case BD_ADDR_TYPE_CLASSIC: 3105 log_info("sending hci_create_connection"); 3106 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3107 break; 3108 #endif 3109 default: 3110 #ifdef ENABLE_BLE 3111 #ifdef ENABLE_LE_CENTRAL 3112 log_info("sending hci_le_create_connection"); 3113 hci_send_cmd(&hci_le_create_connection, 3114 0x0060, // scan interval: 60 ms 3115 0x0030, // scan interval: 30 ms 3116 0, // don't use whitelist 3117 connection->address_type, // peer address type 3118 connection->address, // peer bd addr 3119 hci_stack->le_own_addr_type, // our addr type: 3120 hci_stack->le_connection_interval_min, // conn interval min 3121 hci_stack->le_connection_interval_max, // conn interval max 3122 hci_stack->le_connection_latency, // conn latency 3123 hci_stack->le_supervision_timeout, // conn latency 3124 hci_stack->le_minimum_ce_length, // min ce length 3125 hci_stack->le_maximum_ce_length // max ce length 3126 ); 3127 connection->state = SENT_CREATE_CONNECTION; 3128 #endif 3129 #endif 3130 break; 3131 } 3132 return; 3133 3134 #ifdef ENABLE_CLASSIC 3135 case RECEIVED_CONNECTION_REQUEST: 3136 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3137 connection->state = ACCEPTED_CONNECTION_REQUEST; 3138 connection->role = HCI_ROLE_SLAVE; 3139 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3140 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3141 } 3142 return; 3143 #endif 3144 3145 #ifdef ENABLE_BLE 3146 #ifdef ENABLE_LE_CENTRAL 3147 case SEND_CANCEL_CONNECTION: 3148 connection->state = SENT_CANCEL_CONNECTION; 3149 hci_send_cmd(&hci_le_create_connection_cancel); 3150 return; 3151 #endif 3152 #endif 3153 case SEND_DISCONNECT: 3154 connection->state = SENT_DISCONNECT; 3155 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3156 return; 3157 3158 default: 3159 break; 3160 } 3161 3162 #ifdef ENABLE_CLASSIC 3163 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3164 log_info("responding to link key request"); 3165 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3166 link_key_t link_key; 3167 link_key_type_t link_key_type; 3168 if ( hci_stack->link_key_db 3169 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3170 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3171 connection->link_key_type = link_key_type; 3172 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3173 } else { 3174 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3175 } 3176 return; 3177 } 3178 3179 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3180 log_info("denying to pin request"); 3181 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3182 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3183 return; 3184 } 3185 3186 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3187 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3188 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3189 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3190 // tweak authentication requirements 3191 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3192 if (connection->bonding_flags & BONDING_DEDICATED){ 3193 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3194 } 3195 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3196 authreq |= 1; 3197 } 3198 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3199 } else { 3200 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3201 } 3202 return; 3203 } 3204 3205 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3206 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3207 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3208 return; 3209 } 3210 3211 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3212 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3213 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3214 return; 3215 } 3216 3217 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3218 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3219 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3220 return; 3221 } 3222 3223 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3224 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3225 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3226 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3227 return; 3228 } 3229 3230 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3231 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3232 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3233 return; 3234 } 3235 3236 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3237 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3238 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3239 return; 3240 } 3241 #endif 3242 3243 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3244 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3245 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3246 return; 3247 } 3248 3249 #ifdef ENABLE_BLE 3250 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3251 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3252 3253 uint16_t connection_interval_min = connection->le_conn_interval_min; 3254 connection->le_conn_interval_min = 0; 3255 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3256 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3257 0x0000, 0xffff); 3258 } 3259 #endif 3260 } 3261 3262 hci_connection_t * connection; 3263 switch (hci_stack->state){ 3264 case HCI_STATE_INITIALIZING: 3265 hci_initializing_run(); 3266 break; 3267 3268 case HCI_STATE_HALTING: 3269 3270 log_info("HCI_STATE_HALTING"); 3271 3272 // free whitelist entries 3273 #ifdef ENABLE_BLE 3274 #ifdef ENABLE_LE_CENTRAL 3275 { 3276 btstack_linked_list_iterator_t lit; 3277 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3278 while (btstack_linked_list_iterator_has_next(&lit)){ 3279 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3280 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3281 btstack_memory_whitelist_entry_free(entry); 3282 } 3283 } 3284 #endif 3285 #endif 3286 // close all open connections 3287 connection = (hci_connection_t *) hci_stack->connections; 3288 if (connection){ 3289 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3290 if (!hci_can_send_command_packet_now()) return; 3291 3292 // check state 3293 if (connection->state == SENT_DISCONNECT) return; 3294 connection->state = SENT_DISCONNECT; 3295 3296 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3297 3298 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3299 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3300 3301 // ... which would be ignored anyway as we shutdown (free) the connection now 3302 hci_shutdown_connection(connection); 3303 3304 // finally, send the disconnect command 3305 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3306 return; 3307 } 3308 log_info("HCI_STATE_HALTING, calling off"); 3309 3310 // switch mode 3311 hci_power_control_off(); 3312 3313 log_info("HCI_STATE_HALTING, emitting state"); 3314 hci_emit_state(); 3315 log_info("HCI_STATE_HALTING, done"); 3316 break; 3317 3318 case HCI_STATE_FALLING_ASLEEP: 3319 switch(hci_stack->substate) { 3320 case HCI_FALLING_ASLEEP_DISCONNECT: 3321 log_info("HCI_STATE_FALLING_ASLEEP"); 3322 // close all open connections 3323 connection = (hci_connection_t *) hci_stack->connections; 3324 3325 #ifdef HAVE_PLATFORM_IPHONE_OS 3326 // don't close connections, if H4 supports power management 3327 if (btstack_control_iphone_power_management_enabled()){ 3328 connection = NULL; 3329 } 3330 #endif 3331 if (connection){ 3332 3333 // send disconnect 3334 if (!hci_can_send_command_packet_now()) return; 3335 3336 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3337 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3338 3339 // send disconnected event right away - causes higher layer connections to get closed, too. 3340 hci_shutdown_connection(connection); 3341 return; 3342 } 3343 3344 if (hci_classic_supported()){ 3345 // disable page and inquiry scan 3346 if (!hci_can_send_command_packet_now()) return; 3347 3348 log_info("HCI_STATE_HALTING, disabling inq scans"); 3349 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3350 3351 // continue in next sub state 3352 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3353 break; 3354 } 3355 // no break - fall through for ble-only chips 3356 3357 case HCI_FALLING_ASLEEP_COMPLETE: 3358 log_info("HCI_STATE_HALTING, calling sleep"); 3359 #ifdef HAVE_PLATFORM_IPHONE_OS 3360 // don't actually go to sleep, if H4 supports power management 3361 if (btstack_control_iphone_power_management_enabled()){ 3362 // SLEEP MODE reached 3363 hci_stack->state = HCI_STATE_SLEEPING; 3364 hci_emit_state(); 3365 break; 3366 } 3367 #endif 3368 // switch mode 3369 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3370 hci_emit_state(); 3371 break; 3372 3373 default: 3374 break; 3375 } 3376 break; 3377 3378 default: 3379 break; 3380 } 3381 } 3382 3383 int hci_send_cmd_packet(uint8_t *packet, int size){ 3384 // house-keeping 3385 3386 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3387 hci_stack->loopback_mode = packet[3]; 3388 } 3389 3390 #ifdef ENABLE_CLASSIC 3391 bd_addr_t addr; 3392 hci_connection_t * conn; 3393 3394 // create_connection? 3395 if (IS_COMMAND(packet, hci_create_connection)){ 3396 reverse_bd_addr(&packet[3], addr); 3397 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3398 3399 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3400 if (!conn){ 3401 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3402 if (!conn){ 3403 // notify client that alloc failed 3404 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3405 return 0; // don't sent packet to controller 3406 } 3407 conn->state = SEND_CREATE_CONNECTION; 3408 } 3409 log_info("conn state %u", conn->state); 3410 switch (conn->state){ 3411 // if connection active exists 3412 case OPEN: 3413 // and OPEN, emit connection complete command, don't send to controller 3414 hci_emit_connection_complete(addr, conn->con_handle, 0); 3415 return 0; 3416 case SEND_CREATE_CONNECTION: 3417 // connection created by hci, e.g. dedicated bonding 3418 break; 3419 default: 3420 // otherwise, just ignore as it is already in the open process 3421 return 0; 3422 } 3423 conn->state = SENT_CREATE_CONNECTION; 3424 } 3425 3426 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3427 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3428 } 3429 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3430 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3431 } 3432 3433 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3434 if (hci_stack->link_key_db){ 3435 reverse_bd_addr(&packet[3], addr); 3436 hci_stack->link_key_db->delete_link_key(addr); 3437 } 3438 } 3439 3440 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3441 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3442 reverse_bd_addr(&packet[3], addr); 3443 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3444 if (conn){ 3445 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3446 } 3447 } 3448 3449 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3450 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3451 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3452 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3453 reverse_bd_addr(&packet[3], addr); 3454 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3455 if (conn){ 3456 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3457 } 3458 } 3459 3460 #ifdef ENABLE_SCO_OVER_HCI 3461 // setup_synchronous_connection? Voice setting at offset 22 3462 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3463 // TODO: compare to current setting if sco connection already active 3464 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3465 } 3466 // accept_synchronus_connection? Voice setting at offset 18 3467 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3468 // TODO: compare to current setting if sco connection already active 3469 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3470 } 3471 #endif 3472 #endif 3473 3474 #ifdef ENABLE_BLE 3475 #ifdef ENABLE_LE_PERIPHERAL 3476 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3477 hci_stack->le_random_address_set = 1; 3478 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3479 } 3480 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3481 hci_stack->le_advertisements_active = packet[3]; 3482 } 3483 #endif 3484 #ifdef ENABLE_LE_CENTRAL 3485 if (IS_COMMAND(packet, hci_le_create_connection)){ 3486 // white list used? 3487 uint8_t initiator_filter_policy = packet[7]; 3488 switch (initiator_filter_policy){ 3489 case 0: 3490 // whitelist not used 3491 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3492 break; 3493 case 1: 3494 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3495 break; 3496 default: 3497 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3498 break; 3499 } 3500 } 3501 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3502 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3503 } 3504 #endif 3505 #endif 3506 3507 hci_stack->num_cmd_packets--; 3508 3509 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3510 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3511 3512 // release packet buffer for synchronous transport implementations 3513 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3514 hci_stack->hci_packet_buffer_reserved = 0; 3515 } 3516 3517 return err; 3518 } 3519 3520 // disconnect because of security block 3521 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3522 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3523 if (!connection) return; 3524 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3525 } 3526 3527 3528 // Configure Secure Simple Pairing 3529 3530 #ifdef ENABLE_CLASSIC 3531 3532 // enable will enable SSP during init 3533 void gap_ssp_set_enable(int enable){ 3534 hci_stack->ssp_enable = enable; 3535 } 3536 3537 static int hci_local_ssp_activated(void){ 3538 return gap_ssp_supported() && hci_stack->ssp_enable; 3539 } 3540 3541 // if set, BTstack will respond to io capability request using authentication requirement 3542 void gap_ssp_set_io_capability(int io_capability){ 3543 hci_stack->ssp_io_capability = io_capability; 3544 } 3545 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3546 hci_stack->ssp_authentication_requirement = authentication_requirement; 3547 } 3548 3549 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3550 void gap_ssp_set_auto_accept(int auto_accept){ 3551 hci_stack->ssp_auto_accept = auto_accept; 3552 } 3553 #endif 3554 3555 // va_list part of hci_send_cmd 3556 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3557 if (!hci_can_send_command_packet_now()){ 3558 log_error("hci_send_cmd called but cannot send packet now"); 3559 return 0; 3560 } 3561 3562 // for HCI INITIALIZATION 3563 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3564 hci_stack->last_cmd_opcode = cmd->opcode; 3565 3566 hci_reserve_packet_buffer(); 3567 uint8_t * packet = hci_stack->hci_packet_buffer; 3568 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3569 return hci_send_cmd_packet(packet, size); 3570 } 3571 3572 /** 3573 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3574 */ 3575 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3576 va_list argptr; 3577 va_start(argptr, cmd); 3578 int res = hci_send_cmd_va_arg(cmd, argptr); 3579 va_end(argptr); 3580 return res; 3581 } 3582 3583 // Create various non-HCI events. 3584 // TODO: generalize, use table similar to hci_create_command 3585 3586 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3587 // dump packet 3588 if (dump) { 3589 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3590 } 3591 3592 // dispatch to all event handlers 3593 btstack_linked_list_iterator_t it; 3594 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3595 while (btstack_linked_list_iterator_has_next(&it)){ 3596 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3597 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3598 } 3599 } 3600 3601 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3602 if (!hci_stack->acl_packet_handler) return; 3603 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3604 } 3605 3606 #ifdef ENABLE_CLASSIC 3607 static void hci_notify_if_sco_can_send_now(void){ 3608 // notify SCO sender if waiting 3609 if (!hci_stack->sco_waiting_for_can_send_now) return; 3610 if (hci_can_send_sco_packet_now()){ 3611 hci_stack->sco_waiting_for_can_send_now = 0; 3612 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3613 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3614 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3615 } 3616 } 3617 3618 // parsing end emitting has been merged to reduce code size 3619 static void gap_inquiry_explode(uint8_t * packet){ 3620 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3621 3622 uint8_t * eir_data; 3623 ad_context_t context; 3624 const uint8_t * name; 3625 uint8_t name_len; 3626 3627 int event_type = hci_event_packet_get_type(packet); 3628 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3629 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3630 3631 // event[1] is set at the end 3632 int i; 3633 for (i=0; i<num_responses;i++){ 3634 memset(event, 0, sizeof(event)); 3635 event[0] = GAP_EVENT_INQUIRY_RESULT; 3636 uint8_t event_size = 18; // if name is not set by EIR 3637 3638 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3639 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3640 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3641 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3642 3643 switch (event_type){ 3644 case HCI_EVENT_INQUIRY_RESULT: 3645 // 14,15,16,17 = 0, size 18 3646 break; 3647 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3648 event[14] = 1; 3649 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3650 // 16,17 = 0, size 18 3651 break; 3652 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3653 event[14] = 1; 3654 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3655 // for EIR packets, there is only one reponse in it 3656 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3657 name = NULL; 3658 // EIR data is 240 bytes in EIR event 3659 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3660 uint8_t data_type = ad_iterator_get_data_type(&context); 3661 uint8_t data_size = ad_iterator_get_data_len(&context); 3662 const uint8_t * data = ad_iterator_get_data(&context); 3663 // Prefer Complete Local Name over Shortend Local Name 3664 switch (data_type){ 3665 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3666 if (name) continue; 3667 /* explicit fall-through */ 3668 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3669 name = data; 3670 name_len = data_size; 3671 break; 3672 default: 3673 break; 3674 } 3675 } 3676 if (name){ 3677 event[16] = 1; 3678 // truncate name if needed 3679 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3680 event[17] = len; 3681 memcpy(&event[18], name, len); 3682 event_size += len; 3683 } 3684 break; 3685 } 3686 event[1] = event_size - 2; 3687 hci_emit_event(event, event_size, 1); 3688 } 3689 } 3690 #endif 3691 3692 void hci_emit_state(void){ 3693 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3694 uint8_t event[3]; 3695 event[0] = BTSTACK_EVENT_STATE; 3696 event[1] = sizeof(event) - 2; 3697 event[2] = hci_stack->state; 3698 hci_emit_event(event, sizeof(event), 1); 3699 } 3700 3701 #ifdef ENABLE_CLASSIC 3702 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3703 uint8_t event[13]; 3704 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3705 event[1] = sizeof(event) - 2; 3706 event[2] = status; 3707 little_endian_store_16(event, 3, con_handle); 3708 reverse_bd_addr(address, &event[5]); 3709 event[11] = 1; // ACL connection 3710 event[12] = 0; // encryption disabled 3711 hci_emit_event(event, sizeof(event), 1); 3712 } 3713 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3714 if (disable_l2cap_timeouts) return; 3715 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3716 uint8_t event[4]; 3717 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3718 event[1] = sizeof(event) - 2; 3719 little_endian_store_16(event, 2, conn->con_handle); 3720 hci_emit_event(event, sizeof(event), 1); 3721 } 3722 #endif 3723 3724 #ifdef ENABLE_BLE 3725 #ifdef ENABLE_LE_CENTRAL 3726 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3727 uint8_t event[21]; 3728 event[0] = HCI_EVENT_LE_META; 3729 event[1] = sizeof(event) - 2; 3730 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3731 event[3] = status; 3732 little_endian_store_16(event, 4, con_handle); 3733 event[6] = 0; // TODO: role 3734 event[7] = address_type; 3735 reverse_bd_addr(address, &event[8]); 3736 little_endian_store_16(event, 14, 0); // interval 3737 little_endian_store_16(event, 16, 0); // latency 3738 little_endian_store_16(event, 18, 0); // supervision timeout 3739 event[20] = 0; // master clock accuracy 3740 hci_emit_event(event, sizeof(event), 1); 3741 } 3742 #endif 3743 #endif 3744 3745 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3746 uint8_t event[6]; 3747 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3748 event[1] = sizeof(event) - 2; 3749 event[2] = 0; // status = OK 3750 little_endian_store_16(event, 3, con_handle); 3751 event[5] = reason; 3752 hci_emit_event(event, sizeof(event), 1); 3753 } 3754 3755 static void hci_emit_nr_connections_changed(void){ 3756 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3757 uint8_t event[3]; 3758 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3759 event[1] = sizeof(event) - 2; 3760 event[2] = nr_hci_connections(); 3761 hci_emit_event(event, sizeof(event), 1); 3762 } 3763 3764 static void hci_emit_hci_open_failed(void){ 3765 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3766 uint8_t event[2]; 3767 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3768 event[1] = sizeof(event) - 2; 3769 hci_emit_event(event, sizeof(event), 1); 3770 } 3771 3772 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3773 log_info("hci_emit_dedicated_bonding_result %u ", status); 3774 uint8_t event[9]; 3775 int pos = 0; 3776 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3777 event[pos++] = sizeof(event) - 2; 3778 event[pos++] = status; 3779 reverse_bd_addr(address, &event[pos]); 3780 hci_emit_event(event, sizeof(event), 1); 3781 } 3782 3783 3784 #ifdef ENABLE_CLASSIC 3785 3786 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3787 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3788 uint8_t event[5]; 3789 int pos = 0; 3790 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3791 event[pos++] = sizeof(event) - 2; 3792 little_endian_store_16(event, 2, con_handle); 3793 pos += 2; 3794 event[pos++] = level; 3795 hci_emit_event(event, sizeof(event), 1); 3796 } 3797 3798 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3799 if (!connection) return LEVEL_0; 3800 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3801 return gap_security_level_for_link_key_type(connection->link_key_type); 3802 } 3803 3804 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3805 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3806 uint8_t event[3]; 3807 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3808 event[1] = sizeof(event) - 2; 3809 event[2] = enabled; 3810 hci_emit_event(event, sizeof(event), 1); 3811 } 3812 3813 #ifdef ENABLE_CLASSIC 3814 // query if remote side supports eSCO 3815 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3816 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3817 if (!connection) return 0; 3818 return connection->remote_supported_feature_eSCO; 3819 } 3820 3821 // query if remote side supports SSP 3822 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3823 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3824 if (!connection) return 0; 3825 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3826 } 3827 3828 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3829 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3830 } 3831 #endif 3832 3833 // GAP API 3834 /** 3835 * @bbrief enable/disable bonding. default is enabled 3836 * @praram enabled 3837 */ 3838 void gap_set_bondable_mode(int enable){ 3839 hci_stack->bondable = enable ? 1 : 0; 3840 } 3841 /** 3842 * @brief Get bondable mode. 3843 * @return 1 if bondable 3844 */ 3845 int gap_get_bondable_mode(void){ 3846 return hci_stack->bondable; 3847 } 3848 3849 /** 3850 * @brief map link keys to security levels 3851 */ 3852 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3853 switch (link_key_type){ 3854 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3855 return LEVEL_4; 3856 case COMBINATION_KEY: 3857 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3858 return LEVEL_3; 3859 default: 3860 return LEVEL_2; 3861 } 3862 } 3863 3864 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3865 log_info("gap_mitm_protection_required_for_security_level %u", level); 3866 return level > LEVEL_2; 3867 } 3868 3869 /** 3870 * @brief get current security level 3871 */ 3872 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3873 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3874 if (!connection) return LEVEL_0; 3875 return gap_security_level_for_connection(connection); 3876 } 3877 3878 /** 3879 * @brief request connection to device to 3880 * @result GAP_AUTHENTICATION_RESULT 3881 */ 3882 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3883 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3884 if (!connection){ 3885 hci_emit_security_level(con_handle, LEVEL_0); 3886 return; 3887 } 3888 gap_security_level_t current_level = gap_security_level(con_handle); 3889 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3890 if (current_level >= requested_level){ 3891 hci_emit_security_level(con_handle, current_level); 3892 return; 3893 } 3894 3895 connection->requested_security_level = requested_level; 3896 3897 #if 0 3898 // sending encryption request without a link key results in an error. 3899 // TODO: figure out how to use it properly 3900 3901 // would enabling ecnryption suffice (>= LEVEL_2)? 3902 if (hci_stack->link_key_db){ 3903 link_key_type_t link_key_type; 3904 link_key_t link_key; 3905 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3906 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3907 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3908 return; 3909 } 3910 } 3911 } 3912 #endif 3913 3914 // try to authenticate connection 3915 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3916 hci_run(); 3917 } 3918 3919 /** 3920 * @brief start dedicated bonding with device. disconnect after bonding 3921 * @param device 3922 * @param request MITM protection 3923 * @result GAP_DEDICATED_BONDING_COMPLETE 3924 */ 3925 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3926 3927 // create connection state machine 3928 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3929 3930 if (!connection){ 3931 return BTSTACK_MEMORY_ALLOC_FAILED; 3932 } 3933 3934 // delete linkn key 3935 gap_drop_link_key_for_bd_addr(device); 3936 3937 // configure LEVEL_2/3, dedicated bonding 3938 connection->state = SEND_CREATE_CONNECTION; 3939 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3940 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3941 connection->bonding_flags = BONDING_DEDICATED; 3942 3943 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3944 3945 // handle: connnection failure (connection complete != ok) 3946 // handle: authentication failure 3947 // handle: disconnect on done 3948 3949 hci_run(); 3950 3951 return 0; 3952 } 3953 #endif 3954 3955 void gap_set_local_name(const char * local_name){ 3956 hci_stack->local_name = local_name; 3957 } 3958 3959 3960 #ifdef ENABLE_BLE 3961 3962 #ifdef ENABLE_LE_CENTRAL 3963 void gap_start_scan(void){ 3964 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3965 hci_stack->le_scanning_state = LE_START_SCAN; 3966 hci_run(); 3967 } 3968 3969 void gap_stop_scan(void){ 3970 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3971 hci_stack->le_scanning_state = LE_STOP_SCAN; 3972 hci_run(); 3973 } 3974 3975 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3976 hci_stack->le_scan_type = scan_type; 3977 hci_stack->le_scan_interval = scan_interval; 3978 hci_stack->le_scan_window = scan_window; 3979 hci_run(); 3980 } 3981 3982 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3983 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3984 if (!conn){ 3985 log_info("gap_connect: no connection exists yet, creating context"); 3986 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3987 if (!conn){ 3988 // notify client that alloc failed 3989 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3990 log_info("gap_connect: failed to alloc hci_connection_t"); 3991 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3992 } 3993 conn->state = SEND_CREATE_CONNECTION; 3994 log_info("gap_connect: send create connection next"); 3995 hci_run(); 3996 return 0; 3997 } 3998 3999 if (!hci_is_le_connection(conn) || 4000 conn->state == SEND_CREATE_CONNECTION || 4001 conn->state == SENT_CREATE_CONNECTION) { 4002 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4003 log_error("gap_connect: classic connection or connect is already being created"); 4004 return GATT_CLIENT_IN_WRONG_STATE; 4005 } 4006 4007 log_info("gap_connect: context exists with state %u", conn->state); 4008 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4009 hci_run(); 4010 return 0; 4011 } 4012 4013 // @assumption: only a single outgoing LE Connection exists 4014 static hci_connection_t * gap_get_outgoing_connection(void){ 4015 btstack_linked_item_t *it; 4016 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4017 hci_connection_t * conn = (hci_connection_t *) it; 4018 if (!hci_is_le_connection(conn)) continue; 4019 switch (conn->state){ 4020 case SEND_CREATE_CONNECTION: 4021 case SENT_CREATE_CONNECTION: 4022 return conn; 4023 default: 4024 break; 4025 }; 4026 } 4027 return NULL; 4028 } 4029 4030 uint8_t gap_connect_cancel(void){ 4031 hci_connection_t * conn = gap_get_outgoing_connection(); 4032 if (!conn) return 0; 4033 switch (conn->state){ 4034 case SEND_CREATE_CONNECTION: 4035 // skip sending create connection and emit event instead 4036 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4037 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4038 btstack_memory_hci_connection_free( conn ); 4039 break; 4040 case SENT_CREATE_CONNECTION: 4041 // request to send cancel connection 4042 conn->state = SEND_CANCEL_CONNECTION; 4043 hci_run(); 4044 break; 4045 default: 4046 break; 4047 } 4048 return 0; 4049 } 4050 #endif 4051 4052 #ifdef ENABLE_LE_CENTRAL 4053 /** 4054 * @brief Set connection parameters for outgoing connections 4055 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4056 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4057 * @param conn_latency, default: 4 4058 * @param supervision_timeout (unit: 10ms), default: 720 ms 4059 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4060 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4061 */ 4062 4063 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 4064 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4065 hci_stack->le_connection_interval_min = conn_interval_min; 4066 hci_stack->le_connection_interval_max = conn_interval_max; 4067 hci_stack->le_connection_latency = conn_latency; 4068 hci_stack->le_supervision_timeout = supervision_timeout; 4069 hci_stack->le_minimum_ce_length = min_ce_length; 4070 hci_stack->le_maximum_ce_length = max_ce_length; 4071 } 4072 #endif 4073 4074 /** 4075 * @brief Updates the connection parameters for a given LE connection 4076 * @param handle 4077 * @param conn_interval_min (unit: 1.25ms) 4078 * @param conn_interval_max (unit: 1.25ms) 4079 * @param conn_latency 4080 * @param supervision_timeout (unit: 10ms) 4081 * @returns 0 if ok 4082 */ 4083 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4084 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4085 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4086 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4087 connection->le_conn_interval_min = conn_interval_min; 4088 connection->le_conn_interval_max = conn_interval_max; 4089 connection->le_conn_latency = conn_latency; 4090 connection->le_supervision_timeout = supervision_timeout; 4091 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4092 hci_run(); 4093 return 0; 4094 } 4095 4096 /** 4097 * @brief Request an update of the connection parameter for a given LE connection 4098 * @param handle 4099 * @param conn_interval_min (unit: 1.25ms) 4100 * @param conn_interval_max (unit: 1.25ms) 4101 * @param conn_latency 4102 * @param supervision_timeout (unit: 10ms) 4103 * @returns 0 if ok 4104 */ 4105 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4106 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4107 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4108 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4109 connection->le_conn_interval_min = conn_interval_min; 4110 connection->le_conn_interval_max = conn_interval_max; 4111 connection->le_conn_latency = conn_latency; 4112 connection->le_supervision_timeout = supervision_timeout; 4113 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4114 hci_run(); 4115 return 0; 4116 } 4117 4118 #ifdef ENABLE_LE_PERIPHERAL 4119 4120 static void gap_advertisments_changed(void){ 4121 // disable advertisements before updating adv, scan data, or adv params 4122 if (hci_stack->le_advertisements_active){ 4123 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4124 } 4125 hci_run(); 4126 } 4127 4128 /** 4129 * @brief Set Advertisement Data 4130 * @param advertising_data_length 4131 * @param advertising_data (max 31 octets) 4132 * @note data is not copied, pointer has to stay valid 4133 */ 4134 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4135 hci_stack->le_advertisements_data_len = advertising_data_length; 4136 hci_stack->le_advertisements_data = advertising_data; 4137 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4138 gap_advertisments_changed(); 4139 } 4140 4141 /** 4142 * @brief Set Scan Response Data 4143 * @param advertising_data_length 4144 * @param advertising_data (max 31 octets) 4145 * @note data is not copied, pointer has to stay valid 4146 */ 4147 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4148 hci_stack->le_scan_response_data_len = scan_response_data_length; 4149 hci_stack->le_scan_response_data = scan_response_data; 4150 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4151 gap_advertisments_changed(); 4152 } 4153 4154 /** 4155 * @brief Set Advertisement Parameters 4156 * @param adv_int_min 4157 * @param adv_int_max 4158 * @param adv_type 4159 * @param direct_address_type 4160 * @param direct_address 4161 * @param channel_map 4162 * @param filter_policy 4163 * 4164 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4165 */ 4166 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4167 uint8_t direct_address_typ, bd_addr_t direct_address, 4168 uint8_t channel_map, uint8_t filter_policy) { 4169 4170 hci_stack->le_advertisements_interval_min = adv_int_min; 4171 hci_stack->le_advertisements_interval_max = adv_int_max; 4172 hci_stack->le_advertisements_type = adv_type; 4173 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4174 hci_stack->le_advertisements_channel_map = channel_map; 4175 hci_stack->le_advertisements_filter_policy = filter_policy; 4176 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4177 4178 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4179 gap_advertisments_changed(); 4180 } 4181 4182 /** 4183 * @brief Enable/Disable Advertisements 4184 * @param enabled 4185 */ 4186 void gap_advertisements_enable(int enabled){ 4187 hci_stack->le_advertisements_enabled = enabled; 4188 if (enabled && !hci_stack->le_advertisements_active){ 4189 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4190 } 4191 if (!enabled && hci_stack->le_advertisements_active){ 4192 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4193 } 4194 hci_run(); 4195 } 4196 4197 #endif 4198 4199 void hci_le_set_own_address_type(uint8_t own_address_type){ 4200 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4201 if (own_address_type == hci_stack->le_own_addr_type) return; 4202 hci_stack->le_own_addr_type = own_address_type; 4203 4204 #ifdef ENABLE_LE_PERIPHERAL 4205 // update advertisement parameters, too 4206 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4207 gap_advertisments_changed(); 4208 #endif 4209 #ifdef ENABLE_LE_CENTRAL 4210 // note: we don't update scan parameters or modify ongoing connection attempts 4211 #endif 4212 } 4213 4214 #endif 4215 4216 uint8_t gap_disconnect(hci_con_handle_t handle){ 4217 hci_connection_t * conn = hci_connection_for_handle(handle); 4218 if (!conn){ 4219 hci_emit_disconnection_complete(handle, 0); 4220 return 0; 4221 } 4222 conn->state = SEND_DISCONNECT; 4223 hci_run(); 4224 return 0; 4225 } 4226 4227 /** 4228 * @brief Get connection type 4229 * @param con_handle 4230 * @result connection_type 4231 */ 4232 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4233 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4234 if (!conn) return GAP_CONNECTION_INVALID; 4235 switch (conn->address_type){ 4236 case BD_ADDR_TYPE_LE_PUBLIC: 4237 case BD_ADDR_TYPE_LE_RANDOM: 4238 return GAP_CONNECTION_LE; 4239 case BD_ADDR_TYPE_SCO: 4240 return GAP_CONNECTION_SCO; 4241 case BD_ADDR_TYPE_CLASSIC: 4242 return GAP_CONNECTION_ACL; 4243 default: 4244 return GAP_CONNECTION_INVALID; 4245 } 4246 } 4247 4248 #ifdef ENABLE_BLE 4249 4250 #ifdef ENABLE_LE_CENTRAL 4251 /** 4252 * @brief Auto Connection Establishment - Start Connecting to device 4253 * @param address_typ 4254 * @param address 4255 * @returns 0 if ok 4256 */ 4257 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4258 // check capacity 4259 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4260 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4261 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4262 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4263 entry->address_type = address_type; 4264 memcpy(entry->address, address, 6); 4265 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4266 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4267 hci_run(); 4268 return 0; 4269 } 4270 4271 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4272 btstack_linked_list_iterator_t it; 4273 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4274 while (btstack_linked_list_iterator_has_next(&it)){ 4275 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4276 if (entry->address_type != address_type) continue; 4277 if (memcmp(entry->address, address, 6) != 0) continue; 4278 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4279 // remove from controller if already present 4280 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4281 continue; 4282 } 4283 // direclty remove entry from whitelist 4284 btstack_linked_list_iterator_remove(&it); 4285 btstack_memory_whitelist_entry_free(entry); 4286 } 4287 } 4288 4289 /** 4290 * @brief Auto Connection Establishment - Stop Connecting to device 4291 * @param address_typ 4292 * @param address 4293 * @returns 0 if ok 4294 */ 4295 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4296 hci_remove_from_whitelist(address_type, address); 4297 hci_run(); 4298 return 0; 4299 } 4300 4301 /** 4302 * @brief Auto Connection Establishment - Stop everything 4303 * @note Convenience function to stop all active auto connection attempts 4304 */ 4305 void gap_auto_connection_stop_all(void){ 4306 btstack_linked_list_iterator_t it; 4307 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4308 while (btstack_linked_list_iterator_has_next(&it)){ 4309 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4310 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4311 // remove from controller if already present 4312 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4313 continue; 4314 } 4315 // directly remove entry from whitelist 4316 btstack_linked_list_iterator_remove(&it); 4317 btstack_memory_whitelist_entry_free(entry); 4318 } 4319 hci_run(); 4320 } 4321 #endif 4322 #endif 4323 4324 #ifdef ENABLE_CLASSIC 4325 /** 4326 * @brief Set Extended Inquiry Response data 4327 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4328 * @note has to be done before stack starts up 4329 */ 4330 void gap_set_extended_inquiry_response(const uint8_t * data){ 4331 hci_stack->eir_data = data; 4332 } 4333 4334 /** 4335 * @brief Start GAP Classic Inquiry 4336 * @param duration in 1.28s units 4337 * @return 0 if ok 4338 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4339 */ 4340 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4341 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4342 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4343 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4344 } 4345 hci_stack->inquiry_state = duration_in_1280ms_units; 4346 hci_run(); 4347 return 0; 4348 } 4349 4350 /** 4351 * @brief Stop GAP Classic Inquiry 4352 * @returns 0 if ok 4353 */ 4354 int gap_inquiry_stop(void){ 4355 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4356 // emit inquiry complete event, before it even started 4357 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4358 hci_emit_event(event, sizeof(event), 1); 4359 return 0; 4360 } 4361 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4362 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4363 hci_run(); 4364 return 0; 4365 } 4366 4367 4368 /** 4369 * @brief Remote Name Request 4370 * @param addr 4371 * @param page_scan_repetition_mode 4372 * @param clock_offset only used when bit 15 is set 4373 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4374 */ 4375 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4376 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4377 memcpy(hci_stack->remote_name_addr, addr, 6); 4378 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4379 hci_stack->remote_name_clock_offset = clock_offset; 4380 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4381 hci_run(); 4382 return 0; 4383 } 4384 4385 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4386 hci_stack->gap_pairing_state = state; 4387 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4388 hci_run(); 4389 return 0; 4390 } 4391 4392 /** 4393 * @brief Legacy Pairing Pin Code Response 4394 * @param addr 4395 * @param pin 4396 * @return 0 if ok 4397 */ 4398 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4399 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4400 hci_stack->gap_pairing_pin = pin; 4401 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4402 } 4403 4404 /** 4405 * @brief Abort Legacy Pairing 4406 * @param addr 4407 * @param pin 4408 * @return 0 if ok 4409 */ 4410 int gap_pin_code_negative(bd_addr_t addr){ 4411 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4412 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4413 } 4414 4415 /** 4416 * @brief SSP Passkey Response 4417 * @param addr 4418 * @param passkey 4419 * @return 0 if ok 4420 */ 4421 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4422 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4423 hci_stack->gap_pairing_passkey = passkey; 4424 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4425 } 4426 4427 /** 4428 * @brief Abort SSP Passkey Entry/Pairing 4429 * @param addr 4430 * @param pin 4431 * @return 0 if ok 4432 */ 4433 int gap_ssp_passkey_negative(bd_addr_t addr){ 4434 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4435 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4436 } 4437 4438 /** 4439 * @brief Accept SSP Numeric Comparison 4440 * @param addr 4441 * @param passkey 4442 * @return 0 if ok 4443 */ 4444 int gap_ssp_confirmation_response(bd_addr_t addr){ 4445 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4446 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4447 } 4448 4449 /** 4450 * @brief Abort SSP Numeric Comparison/Pairing 4451 * @param addr 4452 * @param pin 4453 * @return 0 if ok 4454 */ 4455 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4456 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4457 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4458 } 4459 4460 /** 4461 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4462 * @param inquiry_mode see bluetooth_defines.h 4463 */ 4464 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4465 hci_stack->inquiry_mode = mode; 4466 } 4467 4468 /** 4469 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4470 */ 4471 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4472 hci_stack->sco_voice_setting = voice_setting; 4473 } 4474 4475 /** 4476 * @brief Get SCO Voice Setting 4477 * @return current voice setting 4478 */ 4479 uint16_t hci_get_sco_voice_setting(void){ 4480 return hci_stack->sco_voice_setting; 4481 } 4482 4483 /** @brief Get SCO packet length for current SCO Voice setting 4484 * @note Using SCO packets of the exact length is required for USB transfer 4485 * @return Length of SCO packets in bytes (not audio frames) 4486 */ 4487 int hci_get_sco_packet_length(void){ 4488 // see Core Spec for H2 USB Transfer. 4489 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4490 return 27; 4491 } 4492 #endif 4493 4494 4495 HCI_STATE hci_get_state(void){ 4496 return hci_stack->state; 4497 } 4498 4499 4500 /** 4501 * @brief Set callback for Bluetooth Hardware Error 4502 */ 4503 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4504 hci_stack->hardware_error_callback = fn; 4505 } 4506 4507 void hci_disconnect_all(void){ 4508 btstack_linked_list_iterator_t it; 4509 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4510 while (btstack_linked_list_iterator_has_next(&it)){ 4511 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4512 if (con->state == SENT_DISCONNECT) continue; 4513 con->state = SEND_DISCONNECT; 4514 } 4515 hci_run(); 4516 } 4517 4518 uint16_t hci_get_manufacturer(void){ 4519 return hci_stack->manufacturer; 4520 } 4521