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 BTSTACK_CHIPSET_VALID_COMMAND: 1148 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1149 break; 1150 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1151 // 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 default: 1168 // should not get here 1169 break; 1170 } 1171 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1172 break; 1173 } 1174 log_info("Init script done"); 1175 1176 // Init script download on Broadcom chipsets causes: 1177 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1178 // - baud rate to reset, restore UART baud rate if needed 1179 int need_baud_change = hci_stack->config 1180 && hci_stack->chipset 1181 && hci_stack->chipset->set_baudrate_command 1182 && hci_stack->hci_transport->set_baudrate 1183 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1184 if (need_baud_change) { 1185 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1186 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1187 hci_stack->hci_transport->set_baudrate(baud_rate); 1188 } 1189 1190 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1191 // -> Work around: wait a few milliseconds here. 1192 log_info("BCM delay after init script"); 1193 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1194 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1195 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1196 btstack_run_loop_add_timer(&hci_stack->timeout); 1197 break; 1198 } 1199 } 1200 // otherwise continue 1201 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1202 hci_send_cmd(&hci_read_local_supported_commands); 1203 break; 1204 case HCI_INIT_SET_BD_ADDR: 1205 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1206 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1207 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1208 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1209 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1210 break; 1211 #endif 1212 1213 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1214 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1215 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1216 hci_send_cmd(&hci_read_local_supported_commands); 1217 break; 1218 case HCI_INIT_READ_BD_ADDR: 1219 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1220 hci_send_cmd(&hci_read_bd_addr); 1221 break; 1222 case HCI_INIT_READ_BUFFER_SIZE: 1223 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1224 hci_send_cmd(&hci_read_buffer_size); 1225 break; 1226 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1227 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1228 hci_send_cmd(&hci_read_local_supported_features); 1229 break; 1230 1231 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1232 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1233 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1234 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1235 break; 1236 case HCI_INIT_HOST_BUFFER_SIZE: 1237 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1238 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1239 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1240 break; 1241 #endif 1242 1243 case HCI_INIT_SET_EVENT_MASK: 1244 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1245 if (hci_le_supported()){ 1246 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1247 } else { 1248 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1249 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1250 } 1251 break; 1252 1253 #ifdef ENABLE_CLASSIC 1254 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1255 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1256 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1257 break; 1258 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1259 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1260 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1261 break; 1262 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1263 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1264 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1265 break; 1266 case HCI_INIT_WRITE_LOCAL_NAME: { 1267 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1268 hci_reserve_packet_buffer(); 1269 uint8_t * packet = hci_stack->hci_packet_buffer; 1270 // construct HCI Command and send 1271 uint16_t opcode = hci_write_local_name.opcode; 1272 hci_stack->last_cmd_opcode = opcode; 1273 packet[0] = opcode & 0xff; 1274 packet[1] = opcode >> 8; 1275 packet[2] = DEVICE_NAME_LEN; 1276 memset(&packet[3], 0, DEVICE_NAME_LEN); 1277 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1278 // expand '00:00:00:00:00:00' in name with bd_addr 1279 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1280 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1281 break; 1282 } 1283 case HCI_INIT_WRITE_EIR_DATA: { 1284 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1285 hci_reserve_packet_buffer(); 1286 uint8_t * packet = hci_stack->hci_packet_buffer; 1287 // construct HCI Command and send 1288 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1289 hci_stack->last_cmd_opcode = opcode; 1290 packet[0] = opcode & 0xff; 1291 packet[1] = opcode >> 8; 1292 packet[2] = 1 + 240; 1293 packet[3] = 0; // FEC not required 1294 if (hci_stack->eir_data){ 1295 memcpy(&packet[4], hci_stack->eir_data, 240); 1296 } else { 1297 memset(&packet[4], 0, 240); 1298 int name_len = strlen(hci_stack->local_name); 1299 packet[4] = name_len + 1; 1300 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1301 memcpy(&packet[6], hci_stack->local_name, name_len); 1302 } 1303 // expand '00:00:00:00:00:00' in name with bd_addr 1304 hci_replace_bd_addr_placeholder(&packet[4], 240); 1305 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1306 break; 1307 } 1308 case HCI_INIT_WRITE_INQUIRY_MODE: 1309 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1310 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1311 break; 1312 case HCI_INIT_WRITE_SCAN_ENABLE: 1313 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1314 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1315 break; 1316 // only sent if ENABLE_SCO_OVER_HCI is defined 1317 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1318 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1319 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1320 break; 1321 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1322 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1323 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1324 break; 1325 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1326 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1327 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1328 log_info("BCM: Route SCO data via HCI transport"); 1329 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1330 break; 1331 1332 #endif 1333 #ifdef ENABLE_BLE 1334 // LE INIT 1335 case HCI_INIT_LE_READ_BUFFER_SIZE: 1336 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1337 hci_send_cmd(&hci_le_read_buffer_size); 1338 break; 1339 case HCI_INIT_LE_SET_EVENT_MASK: 1340 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1341 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1342 break; 1343 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1344 // LE Supported Host = 1, Simultaneous Host = 0 1345 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1346 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1347 break; 1348 #endif 1349 1350 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1351 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1352 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1353 hci_send_cmd(&hci_le_read_maximum_data_length); 1354 break; 1355 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1356 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1357 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1358 break; 1359 #endif 1360 1361 #ifdef ENABLE_LE_CENTRAL 1362 case HCI_INIT_READ_WHITE_LIST_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1364 hci_send_cmd(&hci_le_read_white_list_size); 1365 break; 1366 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1367 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1368 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1369 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1370 break; 1371 #endif 1372 default: 1373 return; 1374 } 1375 } 1376 1377 static void hci_init_done(void){ 1378 // done. tell the app 1379 log_info("hci_init_done -> HCI_STATE_WORKING"); 1380 hci_stack->state = HCI_STATE_WORKING; 1381 hci_emit_state(); 1382 hci_run(); 1383 } 1384 1385 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1386 1387 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1388 1389 uint8_t command_completed = 0; 1390 1391 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1392 uint16_t opcode = little_endian_read_16(packet,3); 1393 if (opcode == hci_stack->last_cmd_opcode){ 1394 command_completed = 1; 1395 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1396 } else { 1397 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1398 } 1399 } 1400 1401 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1402 uint8_t status = packet[2]; 1403 uint16_t opcode = little_endian_read_16(packet,4); 1404 if (opcode == hci_stack->last_cmd_opcode){ 1405 if (status){ 1406 command_completed = 1; 1407 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1408 } else { 1409 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1410 } 1411 } else { 1412 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1413 } 1414 } 1415 1416 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1417 1418 // Vendor == CSR 1419 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1420 // TODO: track actual command 1421 command_completed = 1; 1422 } 1423 1424 // Vendor == Toshiba 1425 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1426 // TODO: track actual command 1427 command_completed = 1; 1428 } 1429 1430 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1431 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1432 // 1433 // HCI Reset 1434 // Timeout 100 ms 1435 // HCI Reset 1436 // Command Complete Reset 1437 // HCI Read Local Version Information 1438 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1439 // hang... 1440 // 1441 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1442 if (!command_completed 1443 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1444 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1445 1446 uint16_t opcode = little_endian_read_16(packet,3); 1447 if (opcode == hci_reset.opcode){ 1448 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1449 return; 1450 } 1451 } 1452 1453 // CSR & H5 1454 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1455 if (!command_completed 1456 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1457 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1458 1459 uint16_t opcode = little_endian_read_16(packet,3); 1460 if (opcode == hci_reset.opcode){ 1461 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1462 return; 1463 } 1464 } 1465 1466 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1467 // fix: Correct substate and behave as command below 1468 if (command_completed){ 1469 switch (hci_stack->substate){ 1470 case HCI_INIT_SEND_RESET: 1471 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1472 break; 1473 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1474 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1475 break; 1476 default: 1477 break; 1478 } 1479 } 1480 1481 #endif 1482 1483 if (!command_completed) return; 1484 1485 int need_baud_change = 0; 1486 int need_addr_change = 0; 1487 1488 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1489 need_baud_change = hci_stack->config 1490 && hci_stack->chipset 1491 && hci_stack->chipset->set_baudrate_command 1492 && hci_stack->hci_transport->set_baudrate 1493 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1494 1495 need_addr_change = hci_stack->custom_bd_addr_set 1496 && hci_stack->chipset 1497 && hci_stack->chipset->set_bd_addr_command; 1498 #endif 1499 1500 switch(hci_stack->substate){ 1501 1502 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1503 case HCI_INIT_SEND_RESET: 1504 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1505 // fix: just correct substate and behave as command below 1506 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1507 btstack_run_loop_remove_timer(&hci_stack->timeout); 1508 break; 1509 case HCI_INIT_W4_SEND_RESET: 1510 btstack_run_loop_remove_timer(&hci_stack->timeout); 1511 break; 1512 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1513 log_info("Received local name, need baud change %d", need_baud_change); 1514 if (need_baud_change){ 1515 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1516 return; 1517 } 1518 // skip baud change 1519 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1520 return; 1521 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1522 // for STLC2500D, baud rate change already happened. 1523 // for others, baud rate gets changed now 1524 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1525 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1526 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1527 hci_stack->hci_transport->set_baudrate(baud_rate); 1528 } 1529 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1530 return; 1531 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1532 btstack_run_loop_remove_timer(&hci_stack->timeout); 1533 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1534 return; 1535 case HCI_INIT_W4_CUSTOM_INIT: 1536 // repeat custom init 1537 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1538 return; 1539 #else 1540 case HCI_INIT_W4_SEND_RESET: 1541 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1542 return ; 1543 #endif 1544 1545 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1546 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1547 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1548 return; 1549 } 1550 if (need_addr_change){ 1551 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1552 return; 1553 } 1554 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1555 return; 1556 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1557 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1558 if (need_baud_change){ 1559 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1560 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1561 hci_stack->hci_transport->set_baudrate(baud_rate); 1562 } 1563 if (need_addr_change){ 1564 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1565 return; 1566 } 1567 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1568 return; 1569 case HCI_INIT_W4_SET_BD_ADDR: 1570 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1571 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1572 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1573 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1574 return; 1575 } 1576 // skipping st warm boot 1577 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1578 return; 1579 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1580 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1581 return; 1582 #endif 1583 case HCI_INIT_W4_READ_BD_ADDR: 1584 // only read buffer size if supported 1585 if (hci_stack->local_supported_commands[0] & 0x01) { 1586 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1587 return; 1588 } 1589 // skipping read buffer size 1590 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1591 return; 1592 case HCI_INIT_W4_SET_EVENT_MASK: 1593 // skip Classic init commands for LE only chipsets 1594 if (!hci_classic_supported()){ 1595 #ifdef ENABLE_BLE 1596 if (hci_le_supported()){ 1597 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1598 return; 1599 } 1600 #endif 1601 log_error("Neither BR/EDR nor LE supported"); 1602 hci_init_done(); 1603 return; 1604 } 1605 if (!gap_ssp_supported()){ 1606 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1607 return; 1608 } 1609 break; 1610 #ifdef ENABLE_BLE 1611 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1612 // skip write le host if not supported (e.g. on LE only EM9301) 1613 if (hci_stack->local_supported_commands[0] & 0x02) break; 1614 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1615 return; 1616 1617 1618 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1619 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1620 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1621 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1622 return; 1623 } 1624 // explicit fall through to reduce repetitions 1625 #endif 1626 1627 #ifdef ENABLE_LE_CENTRAL 1628 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1629 #else 1630 hci_init_done(); 1631 #endif 1632 return; 1633 #endif 1634 1635 #ifdef ENABLE_SCO_OVER_HCI 1636 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1637 // skip write synchronous flow control if not supported 1638 if (hci_stack->local_supported_commands[0] & 0x04) break; 1639 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1640 // explicit fall through to reduce repetitions 1641 1642 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1643 // skip write default erroneous data reporting if not supported 1644 if (hci_stack->local_supported_commands[0] & 0x08) break; 1645 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1646 // explicit fall through to reduce repetitions 1647 1648 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1649 // skip bcm set sco pcm config on non-Broadcom chipsets 1650 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1651 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1652 // explicit fall through to reduce repetitions 1653 1654 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1655 if (!hci_le_supported()){ 1656 // SKIP LE init for Classic only configuration 1657 hci_init_done(); 1658 return; 1659 } 1660 break; 1661 1662 #else /* !ENABLE_SCO_OVER_HCI */ 1663 1664 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1665 #ifdef ENABLE_BLE 1666 if (hci_le_supported()){ 1667 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1668 return; 1669 } 1670 #endif 1671 // SKIP LE init for Classic only configuration 1672 hci_init_done(); 1673 return; 1674 #endif /* ENABLE_SCO_OVER_HCI */ 1675 1676 // Response to command before init done state -> init done 1677 case (HCI_INIT_DONE-1): 1678 hci_init_done(); 1679 return; 1680 1681 default: 1682 break; 1683 } 1684 hci_initializing_next_state(); 1685 } 1686 1687 static void event_handler(uint8_t *packet, int size){ 1688 1689 uint16_t event_length = packet[1]; 1690 1691 // assert packet is complete 1692 if (size != event_length + 2){ 1693 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1694 return; 1695 } 1696 1697 bd_addr_t addr; 1698 bd_addr_type_t addr_type; 1699 hci_con_handle_t handle; 1700 hci_connection_t * conn; 1701 int i; 1702 #ifdef ENABLE_CLASSIC 1703 uint8_t link_type; 1704 #endif 1705 1706 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1707 1708 switch (hci_event_packet_get_type(packet)) { 1709 1710 case HCI_EVENT_COMMAND_COMPLETE: 1711 // get num cmd packets - limit to 1 to reduce complexity 1712 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1713 1714 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1715 if (packet[5]) break; 1716 // terminate, name 248 chars 1717 packet[6+248] = 0; 1718 log_info("local name: %s", &packet[6]); 1719 } 1720 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1721 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1722 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1723 uint16_t acl_len = little_endian_read_16(packet, 6); 1724 uint16_t sco_len = packet[8]; 1725 1726 // determine usable ACL/SCO payload size 1727 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1728 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1729 1730 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1731 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1732 1733 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1734 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1735 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1736 } 1737 } 1738 #ifdef ENABLE_BLE 1739 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1740 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1741 hci_stack->le_acl_packets_total_num = packet[8]; 1742 // determine usable ACL payload size 1743 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1744 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1745 } 1746 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1747 } 1748 #endif 1749 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1750 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1751 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1752 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1753 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); 1754 } 1755 #endif 1756 #ifdef ENABLE_LE_CENTRAL 1757 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1758 hci_stack->le_whitelist_capacity = packet[6]; 1759 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1760 } 1761 #endif 1762 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1763 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1764 hci_stack->local_bd_addr); 1765 log_info("Local Address, Status: 0x%02x: Addr: %s", 1766 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1767 #ifdef ENABLE_CLASSIC 1768 if (hci_stack->link_key_db){ 1769 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1770 } 1771 #endif 1772 } 1773 #ifdef ENABLE_CLASSIC 1774 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1775 hci_emit_discoverable_enabled(hci_stack->discoverable); 1776 } 1777 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1778 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1779 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1780 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1781 hci_emit_event(event, sizeof(event), 1); 1782 } 1783 } 1784 #endif 1785 1786 // Note: HCI init checks 1787 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1788 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1789 1790 #ifdef ENABLE_CLASSIC 1791 // determine usable ACL packet types based on host buffer size and supported features 1792 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1793 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1794 #endif 1795 // Classic/LE 1796 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1797 } 1798 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1799 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1800 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1801 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1802 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1803 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1804 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1805 } 1806 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1807 hci_stack->local_supported_commands[0] = 1808 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1809 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1810 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1811 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1812 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1813 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1814 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1815 } 1816 #ifdef ENABLE_CLASSIC 1817 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1818 if (packet[5] == 0){ 1819 hci_stack->synchronous_flow_control_enabled = 1; 1820 } 1821 } 1822 #endif 1823 break; 1824 1825 case HCI_EVENT_COMMAND_STATUS: 1826 // get num cmd packets - limit to 1 to reduce complexity 1827 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1828 break; 1829 1830 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1831 int offset = 3; 1832 for (i=0; i<packet[2];i++){ 1833 handle = little_endian_read_16(packet, offset); 1834 offset += 2; 1835 uint16_t num_packets = little_endian_read_16(packet, offset); 1836 offset += 2; 1837 1838 conn = hci_connection_for_handle(handle); 1839 if (!conn){ 1840 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1841 continue; 1842 } 1843 1844 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1845 #ifdef ENABLE_CLASSIC 1846 if (conn->num_sco_packets_sent >= num_packets){ 1847 conn->num_sco_packets_sent -= num_packets; 1848 } else { 1849 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1850 conn->num_sco_packets_sent = 0; 1851 } 1852 hci_notify_if_sco_can_send_now(); 1853 #endif 1854 } else { 1855 if (conn->num_acl_packets_sent >= num_packets){ 1856 conn->num_acl_packets_sent -= num_packets; 1857 } else { 1858 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1859 conn->num_acl_packets_sent = 0; 1860 } 1861 } 1862 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1863 } 1864 break; 1865 } 1866 1867 #ifdef ENABLE_CLASSIC 1868 case HCI_EVENT_INQUIRY_COMPLETE: 1869 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1870 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1871 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1872 hci_emit_event(event, sizeof(event), 1); 1873 } 1874 break; 1875 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1876 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1877 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1878 } 1879 break; 1880 case HCI_EVENT_CONNECTION_REQUEST: 1881 reverse_bd_addr(&packet[2], addr); 1882 // TODO: eval COD 8-10 1883 link_type = packet[11]; 1884 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1885 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1886 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1887 if (!conn) { 1888 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1889 } 1890 if (!conn) { 1891 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1892 hci_stack->decline_reason = 0x0d; 1893 bd_addr_copy(hci_stack->decline_addr, addr); 1894 break; 1895 } 1896 conn->role = HCI_ROLE_SLAVE; 1897 conn->state = RECEIVED_CONNECTION_REQUEST; 1898 // store info about eSCO 1899 if (link_type == 0x02){ 1900 conn->remote_supported_feature_eSCO = 1; 1901 } 1902 hci_run(); 1903 break; 1904 1905 case HCI_EVENT_CONNECTION_COMPLETE: 1906 // Connection management 1907 reverse_bd_addr(&packet[5], addr); 1908 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1909 addr_type = BD_ADDR_TYPE_CLASSIC; 1910 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1911 if (conn) { 1912 if (!packet[2]){ 1913 conn->state = OPEN; 1914 conn->con_handle = little_endian_read_16(packet, 3); 1915 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1916 1917 // restart timer 1918 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1919 btstack_run_loop_add_timer(&conn->timeout); 1920 1921 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1922 1923 hci_emit_nr_connections_changed(); 1924 } else { 1925 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1926 uint8_t status = packet[2]; 1927 bd_addr_t bd_address; 1928 memcpy(&bd_address, conn->address, 6); 1929 1930 // connection failed, remove entry 1931 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1932 btstack_memory_hci_connection_free( conn ); 1933 1934 // notify client if dedicated bonding 1935 if (notify_dedicated_bonding_failed){ 1936 log_info("hci notify_dedicated_bonding_failed"); 1937 hci_emit_dedicated_bonding_result(bd_address, status); 1938 } 1939 1940 // if authentication error, also delete link key 1941 if (packet[2] == 0x05) { 1942 gap_drop_link_key_for_bd_addr(addr); 1943 } 1944 } 1945 } 1946 break; 1947 1948 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1949 reverse_bd_addr(&packet[5], addr); 1950 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1951 if (packet[2]){ 1952 // connection failed 1953 break; 1954 } 1955 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1956 if (!conn) { 1957 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1958 } 1959 if (!conn) { 1960 break; 1961 } 1962 conn->state = OPEN; 1963 conn->con_handle = little_endian_read_16(packet, 3); 1964 1965 #ifdef ENABLE_SCO_OVER_HCI 1966 // update SCO 1967 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1968 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1969 } 1970 #endif 1971 break; 1972 1973 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1974 handle = little_endian_read_16(packet, 3); 1975 conn = hci_connection_for_handle(handle); 1976 if (!conn) break; 1977 if (!packet[2]){ 1978 uint8_t * features = &packet[5]; 1979 if (features[6] & (1 << 3)){ 1980 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1981 } 1982 if (features[3] & (1<<7)){ 1983 conn->remote_supported_feature_eSCO = 1; 1984 } 1985 } 1986 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1987 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1988 if (conn->bonding_flags & BONDING_DEDICATED){ 1989 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1990 } 1991 break; 1992 1993 case HCI_EVENT_LINK_KEY_REQUEST: 1994 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1995 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1996 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1997 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1998 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1999 hci_run(); 2000 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2001 return; 2002 2003 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2004 reverse_bd_addr(&packet[2], addr); 2005 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2006 if (!conn) break; 2007 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2008 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2009 // Change Connection Encryption keeps link key type 2010 if (link_key_type != CHANGED_COMBINATION_KEY){ 2011 conn->link_key_type = link_key_type; 2012 } 2013 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2014 // still forward event to allow dismiss of pairing dialog 2015 break; 2016 } 2017 2018 case HCI_EVENT_PIN_CODE_REQUEST: 2019 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2020 // non-bondable mode: pin code negative reply will be sent 2021 if (!hci_stack->bondable){ 2022 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2023 hci_run(); 2024 return; 2025 } 2026 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2027 if (!hci_stack->link_key_db) break; 2028 hci_event_pin_code_request_get_bd_addr(packet, addr); 2029 hci_stack->link_key_db->delete_link_key(addr); 2030 break; 2031 2032 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2033 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2034 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2035 break; 2036 2037 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2038 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2039 if (!hci_stack->ssp_auto_accept) break; 2040 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2041 break; 2042 2043 case HCI_EVENT_USER_PASSKEY_REQUEST: 2044 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2045 if (!hci_stack->ssp_auto_accept) break; 2046 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2047 break; 2048 #endif 2049 2050 case HCI_EVENT_ENCRYPTION_CHANGE: 2051 handle = little_endian_read_16(packet, 3); 2052 conn = hci_connection_for_handle(handle); 2053 if (!conn) break; 2054 if (packet[2] == 0) { 2055 if (packet[5]){ 2056 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2057 } else { 2058 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2059 } 2060 } 2061 #ifdef ENABLE_CLASSIC 2062 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2063 #endif 2064 break; 2065 2066 #ifdef ENABLE_CLASSIC 2067 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2068 handle = little_endian_read_16(packet, 3); 2069 conn = hci_connection_for_handle(handle); 2070 if (!conn) break; 2071 2072 // dedicated bonding: send result and disconnect 2073 if (conn->bonding_flags & BONDING_DEDICATED){ 2074 conn->bonding_flags &= ~BONDING_DEDICATED; 2075 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2076 conn->bonding_status = packet[2]; 2077 break; 2078 } 2079 2080 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2081 // link key sufficient for requested security 2082 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2083 break; 2084 } 2085 // not enough 2086 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2087 break; 2088 #endif 2089 2090 // HCI_EVENT_DISCONNECTION_COMPLETE 2091 // has been split, to first notify stack before shutting connection down 2092 // see end of function, too. 2093 case HCI_EVENT_DISCONNECTION_COMPLETE: 2094 if (packet[2]) break; // status != 0 2095 handle = little_endian_read_16(packet, 3); 2096 // drop outgoing ACL fragments if it is for closed connection 2097 if (hci_stack->acl_fragmentation_total_size > 0) { 2098 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2099 log_info("hci: drop fragmented ACL data for closed connection"); 2100 hci_stack->acl_fragmentation_total_size = 0; 2101 hci_stack->acl_fragmentation_pos = 0; 2102 } 2103 } 2104 2105 // re-enable advertisements for le connections if active 2106 conn = hci_connection_for_handle(handle); 2107 if (!conn) break; 2108 #ifdef ENABLE_BLE 2109 #ifdef ENABLE_LE_PERIPHERAL 2110 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2111 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2112 } 2113 #endif 2114 #endif 2115 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2116 break; 2117 2118 case HCI_EVENT_HARDWARE_ERROR: 2119 log_error("Hardware Error: 0x%02x", packet[2]); 2120 if (hci_stack->hardware_error_callback){ 2121 (*hci_stack->hardware_error_callback)(packet[2]); 2122 } else { 2123 // if no special requests, just reboot stack 2124 hci_power_control_off(); 2125 hci_power_control_on(); 2126 } 2127 break; 2128 2129 #ifdef ENABLE_CLASSIC 2130 case HCI_EVENT_ROLE_CHANGE: 2131 if (packet[2]) break; // status != 0 2132 handle = little_endian_read_16(packet, 3); 2133 conn = hci_connection_for_handle(handle); 2134 if (!conn) break; // no conn 2135 conn->role = packet[9]; 2136 break; 2137 #endif 2138 2139 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2140 // release packet buffer only for asynchronous transport and if there are not further fragements 2141 if (hci_transport_synchronous()) { 2142 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2143 return; // instead of break: to avoid re-entering hci_run() 2144 } 2145 if (hci_stack->acl_fragmentation_total_size) break; 2146 hci_release_packet_buffer(); 2147 2148 // L2CAP receives this event via the hci_emit_event below 2149 2150 #ifdef ENABLE_CLASSIC 2151 // For SCO, we do the can_send_now_check here 2152 hci_notify_if_sco_can_send_now(); 2153 #endif 2154 break; 2155 2156 #ifdef ENABLE_CLASSIC 2157 case HCI_EVENT_SCO_CAN_SEND_NOW: 2158 // For SCO, we do the can_send_now_check here 2159 hci_notify_if_sco_can_send_now(); 2160 return; 2161 2162 // explode inquriy results for easier consumption 2163 case HCI_EVENT_INQUIRY_RESULT: 2164 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2165 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2166 gap_inquiry_explode(packet); 2167 break; 2168 #endif 2169 2170 #ifdef ENABLE_BLE 2171 case HCI_EVENT_LE_META: 2172 switch (packet[2]){ 2173 #ifdef ENABLE_LE_CENTRAL 2174 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2175 // log_info("advertising report received"); 2176 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2177 le_handle_advertisement_report(packet, size); 2178 break; 2179 #endif 2180 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2181 // Connection management 2182 reverse_bd_addr(&packet[8], addr); 2183 addr_type = (bd_addr_type_t)packet[7]; 2184 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2185 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2186 #ifdef ENABLE_LE_CENTRAL 2187 // if auto-connect, remove from whitelist in both roles 2188 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2189 hci_remove_from_whitelist(addr_type, addr); 2190 } 2191 // handle error: error is reported only to the initiator -> outgoing connection 2192 if (packet[3]){ 2193 // outgoing connection establishment is done 2194 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2195 // remove entry 2196 if (conn){ 2197 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2198 btstack_memory_hci_connection_free( conn ); 2199 } 2200 break; 2201 } 2202 #endif 2203 // on success, both hosts receive connection complete event 2204 if (packet[6] == HCI_ROLE_MASTER){ 2205 #ifdef ENABLE_LE_CENTRAL 2206 // if we're master, it was an outgoing connection and we're done with it 2207 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2208 #endif 2209 } else { 2210 #ifdef ENABLE_LE_PERIPHERAL 2211 // if we're slave, it was an incoming connection, advertisements have stopped 2212 hci_stack->le_advertisements_active = 0; 2213 // try to re-enable them 2214 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2215 #endif 2216 } 2217 // LE connections are auto-accepted, so just create a connection if there isn't one already 2218 if (!conn){ 2219 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2220 } 2221 // no memory, sorry. 2222 if (!conn){ 2223 break; 2224 } 2225 2226 conn->state = OPEN; 2227 conn->role = packet[6]; 2228 conn->con_handle = little_endian_read_16(packet, 4); 2229 2230 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2231 2232 // restart timer 2233 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2234 // btstack_run_loop_add_timer(&conn->timeout); 2235 2236 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2237 2238 hci_emit_nr_connections_changed(); 2239 break; 2240 2241 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2242 2243 default: 2244 break; 2245 } 2246 break; 2247 #endif 2248 default: 2249 break; 2250 } 2251 2252 // handle BT initialization 2253 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2254 hci_initializing_event_handler(packet, size); 2255 } 2256 2257 // help with BT sleep 2258 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2259 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2260 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2261 hci_initializing_next_state(); 2262 } 2263 2264 // notify upper stack 2265 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2266 2267 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2268 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2269 if (!packet[2]){ 2270 handle = little_endian_read_16(packet, 3); 2271 hci_connection_t * aConn = hci_connection_for_handle(handle); 2272 if (aConn) { 2273 uint8_t status = aConn->bonding_status; 2274 uint16_t flags = aConn->bonding_flags; 2275 bd_addr_t bd_address; 2276 memcpy(&bd_address, aConn->address, 6); 2277 hci_shutdown_connection(aConn); 2278 // connection struct is gone, don't access anymore 2279 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2280 hci_emit_dedicated_bonding_result(bd_address, status); 2281 } 2282 } 2283 } 2284 } 2285 2286 // execute main loop 2287 hci_run(); 2288 } 2289 2290 #ifdef ENABLE_CLASSIC 2291 static void sco_handler(uint8_t * packet, uint16_t size){ 2292 if (!hci_stack->sco_packet_handler) return; 2293 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2294 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2295 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2296 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2297 if (conn){ 2298 conn->num_packets_completed++; 2299 hci_stack->host_completed_packets = 1; 2300 hci_run(); 2301 } 2302 #endif 2303 } 2304 #endif 2305 2306 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2307 hci_dump_packet(packet_type, 1, packet, size); 2308 switch (packet_type) { 2309 case HCI_EVENT_PACKET: 2310 event_handler(packet, size); 2311 break; 2312 case HCI_ACL_DATA_PACKET: 2313 acl_handler(packet, size); 2314 break; 2315 #ifdef ENABLE_CLASSIC 2316 case HCI_SCO_DATA_PACKET: 2317 sco_handler(packet, size); 2318 break; 2319 #endif 2320 default: 2321 break; 2322 } 2323 } 2324 2325 /** 2326 * @brief Add event packet handler. 2327 */ 2328 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2329 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2330 } 2331 2332 2333 /** Register HCI packet handlers */ 2334 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2335 hci_stack->acl_packet_handler = handler; 2336 } 2337 2338 #ifdef ENABLE_CLASSIC 2339 /** 2340 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2341 */ 2342 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2343 hci_stack->sco_packet_handler = handler; 2344 } 2345 #endif 2346 2347 static void hci_state_reset(void){ 2348 // no connections yet 2349 hci_stack->connections = NULL; 2350 2351 // keep discoverable/connectable as this has been requested by the client(s) 2352 // hci_stack->discoverable = 0; 2353 // hci_stack->connectable = 0; 2354 // hci_stack->bondable = 1; 2355 // hci_stack->own_addr_type = 0; 2356 2357 // buffer is free 2358 hci_stack->hci_packet_buffer_reserved = 0; 2359 2360 // no pending cmds 2361 hci_stack->decline_reason = 0; 2362 hci_stack->new_scan_enable_value = 0xff; 2363 2364 // LE 2365 #ifdef ENABLE_BLE 2366 memset(hci_stack->le_random_address, 0, 6); 2367 hci_stack->le_random_address_set = 0; 2368 #endif 2369 #ifdef ENABLE_LE_CENTRAL 2370 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2371 hci_stack->le_scan_type = 0xff; 2372 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2373 hci_stack->le_whitelist = 0; 2374 hci_stack->le_whitelist_capacity = 0; 2375 #endif 2376 } 2377 2378 #ifdef ENABLE_CLASSIC 2379 /** 2380 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2381 */ 2382 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2383 // store and open remote device db 2384 hci_stack->link_key_db = link_key_db; 2385 if (hci_stack->link_key_db) { 2386 hci_stack->link_key_db->open(); 2387 } 2388 } 2389 #endif 2390 2391 void hci_init(const hci_transport_t *transport, const void *config){ 2392 2393 #ifdef HAVE_MALLOC 2394 if (!hci_stack) { 2395 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2396 } 2397 #else 2398 hci_stack = &hci_stack_static; 2399 #endif 2400 memset(hci_stack, 0, sizeof(hci_stack_t)); 2401 2402 // reference to use transport layer implementation 2403 hci_stack->hci_transport = transport; 2404 2405 // reference to used config 2406 hci_stack->config = config; 2407 2408 // setup pointer for outgoing packet buffer 2409 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2410 2411 // max acl payload size defined in config.h 2412 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2413 2414 // register packet handlers with transport 2415 transport->register_packet_handler(&packet_handler); 2416 2417 hci_stack->state = HCI_STATE_OFF; 2418 2419 // class of device 2420 hci_stack->class_of_device = 0x007a020c; // Smartphone 2421 2422 // bondable by default 2423 hci_stack->bondable = 1; 2424 2425 #ifdef ENABLE_CLASSIC 2426 // classic name 2427 hci_stack->local_name = default_classic_name; 2428 #endif 2429 2430 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2431 hci_stack->ssp_enable = 1; 2432 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2433 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2434 hci_stack->ssp_auto_accept = 1; 2435 2436 // voice setting - signed 16 bit pcm data with CVSD over the air 2437 hci_stack->sco_voice_setting = 0x60; 2438 2439 #ifdef ENABLE_LE_CENTRAL 2440 // connection parameter to use for outgoing connections 2441 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2442 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2443 hci_stack->le_connection_latency = 4; // 4 2444 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2445 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2446 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2447 #endif 2448 2449 // connection parameter range used to answer connection parameter update requests in l2cap 2450 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2451 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2452 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2453 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2454 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2455 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2456 2457 hci_state_reset(); 2458 } 2459 2460 /** 2461 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2462 */ 2463 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2464 hci_stack->chipset = chipset_driver; 2465 2466 // reset chipset driver - init is also called on power_up 2467 if (hci_stack->chipset && hci_stack->chipset->init){ 2468 hci_stack->chipset->init(hci_stack->config); 2469 } 2470 } 2471 2472 /** 2473 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2474 */ 2475 void hci_set_control(const btstack_control_t *hardware_control){ 2476 // references to used control implementation 2477 hci_stack->control = hardware_control; 2478 // init with transport config 2479 hardware_control->init(hci_stack->config); 2480 } 2481 2482 void hci_close(void){ 2483 // close remote device db 2484 if (hci_stack->link_key_db) { 2485 hci_stack->link_key_db->close(); 2486 } 2487 2488 btstack_linked_list_iterator_t lit; 2489 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2490 while (btstack_linked_list_iterator_has_next(&lit)){ 2491 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2492 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2493 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2494 hci_shutdown_connection(connection); 2495 } 2496 2497 hci_power_control(HCI_POWER_OFF); 2498 2499 #ifdef HAVE_MALLOC 2500 free(hci_stack); 2501 #endif 2502 hci_stack = NULL; 2503 } 2504 2505 #ifdef ENABLE_CLASSIC 2506 void gap_set_class_of_device(uint32_t class_of_device){ 2507 hci_stack->class_of_device = class_of_device; 2508 } 2509 2510 void hci_disable_l2cap_timeout_check(void){ 2511 disable_l2cap_timeouts = 1; 2512 } 2513 #endif 2514 2515 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2516 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2517 void hci_set_bd_addr(bd_addr_t addr){ 2518 memcpy(hci_stack->custom_bd_addr, addr, 6); 2519 hci_stack->custom_bd_addr_set = 1; 2520 } 2521 #endif 2522 2523 // State-Module-Driver overview 2524 // state module low-level 2525 // HCI_STATE_OFF off close 2526 // HCI_STATE_INITIALIZING, on open 2527 // HCI_STATE_WORKING, on open 2528 // HCI_STATE_HALTING, on open 2529 // HCI_STATE_SLEEPING, off/sleep close 2530 // HCI_STATE_FALLING_ASLEEP on open 2531 2532 static int hci_power_control_on(void){ 2533 2534 // power on 2535 int err = 0; 2536 if (hci_stack->control && hci_stack->control->on){ 2537 err = (*hci_stack->control->on)(); 2538 } 2539 if (err){ 2540 log_error( "POWER_ON failed"); 2541 hci_emit_hci_open_failed(); 2542 return err; 2543 } 2544 2545 // int chipset driver 2546 if (hci_stack->chipset && hci_stack->chipset->init){ 2547 hci_stack->chipset->init(hci_stack->config); 2548 } 2549 2550 // init transport 2551 if (hci_stack->hci_transport->init){ 2552 hci_stack->hci_transport->init(hci_stack->config); 2553 } 2554 2555 // open transport 2556 err = hci_stack->hci_transport->open(); 2557 if (err){ 2558 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2559 if (hci_stack->control && hci_stack->control->off){ 2560 (*hci_stack->control->off)(); 2561 } 2562 hci_emit_hci_open_failed(); 2563 return err; 2564 } 2565 return 0; 2566 } 2567 2568 static void hci_power_control_off(void){ 2569 2570 log_info("hci_power_control_off"); 2571 2572 // close low-level device 2573 hci_stack->hci_transport->close(); 2574 2575 log_info("hci_power_control_off - hci_transport closed"); 2576 2577 // power off 2578 if (hci_stack->control && hci_stack->control->off){ 2579 (*hci_stack->control->off)(); 2580 } 2581 2582 log_info("hci_power_control_off - control closed"); 2583 2584 hci_stack->state = HCI_STATE_OFF; 2585 } 2586 2587 static void hci_power_control_sleep(void){ 2588 2589 log_info("hci_power_control_sleep"); 2590 2591 #if 0 2592 // don't close serial port during sleep 2593 2594 // close low-level device 2595 hci_stack->hci_transport->close(hci_stack->config); 2596 #endif 2597 2598 // sleep mode 2599 if (hci_stack->control && hci_stack->control->sleep){ 2600 (*hci_stack->control->sleep)(); 2601 } 2602 2603 hci_stack->state = HCI_STATE_SLEEPING; 2604 } 2605 2606 static int hci_power_control_wake(void){ 2607 2608 log_info("hci_power_control_wake"); 2609 2610 // wake on 2611 if (hci_stack->control && hci_stack->control->wake){ 2612 (*hci_stack->control->wake)(); 2613 } 2614 2615 #if 0 2616 // open low-level device 2617 int err = hci_stack->hci_transport->open(hci_stack->config); 2618 if (err){ 2619 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2620 if (hci_stack->control && hci_stack->control->off){ 2621 (*hci_stack->control->off)(); 2622 } 2623 hci_emit_hci_open_failed(); 2624 return err; 2625 } 2626 #endif 2627 2628 return 0; 2629 } 2630 2631 static void hci_power_transition_to_initializing(void){ 2632 // set up state machine 2633 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2634 hci_stack->hci_packet_buffer_reserved = 0; 2635 hci_stack->state = HCI_STATE_INITIALIZING; 2636 hci_stack->substate = HCI_INIT_SEND_RESET; 2637 } 2638 2639 int hci_power_control(HCI_POWER_MODE power_mode){ 2640 2641 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2642 2643 int err = 0; 2644 switch (hci_stack->state){ 2645 2646 case HCI_STATE_OFF: 2647 switch (power_mode){ 2648 case HCI_POWER_ON: 2649 err = hci_power_control_on(); 2650 if (err) { 2651 log_error("hci_power_control_on() error %d", err); 2652 return err; 2653 } 2654 hci_power_transition_to_initializing(); 2655 break; 2656 case HCI_POWER_OFF: 2657 // do nothing 2658 break; 2659 case HCI_POWER_SLEEP: 2660 // do nothing (with SLEEP == OFF) 2661 break; 2662 } 2663 break; 2664 2665 case HCI_STATE_INITIALIZING: 2666 switch (power_mode){ 2667 case HCI_POWER_ON: 2668 // do nothing 2669 break; 2670 case HCI_POWER_OFF: 2671 // no connections yet, just turn it off 2672 hci_power_control_off(); 2673 break; 2674 case HCI_POWER_SLEEP: 2675 // no connections yet, just turn it off 2676 hci_power_control_sleep(); 2677 break; 2678 } 2679 break; 2680 2681 case HCI_STATE_WORKING: 2682 switch (power_mode){ 2683 case HCI_POWER_ON: 2684 // do nothing 2685 break; 2686 case HCI_POWER_OFF: 2687 // see hci_run 2688 hci_stack->state = HCI_STATE_HALTING; 2689 break; 2690 case HCI_POWER_SLEEP: 2691 // see hci_run 2692 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2693 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2694 break; 2695 } 2696 break; 2697 2698 case HCI_STATE_HALTING: 2699 switch (power_mode){ 2700 case HCI_POWER_ON: 2701 hci_power_transition_to_initializing(); 2702 break; 2703 case HCI_POWER_OFF: 2704 // do nothing 2705 break; 2706 case HCI_POWER_SLEEP: 2707 // see hci_run 2708 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2709 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2710 break; 2711 } 2712 break; 2713 2714 case HCI_STATE_FALLING_ASLEEP: 2715 switch (power_mode){ 2716 case HCI_POWER_ON: 2717 2718 #ifdef HAVE_PLATFORM_IPHONE_OS 2719 // nothing to do, if H4 supports power management 2720 if (btstack_control_iphone_power_management_enabled()){ 2721 hci_stack->state = HCI_STATE_INITIALIZING; 2722 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2723 break; 2724 } 2725 #endif 2726 hci_power_transition_to_initializing(); 2727 break; 2728 case HCI_POWER_OFF: 2729 // see hci_run 2730 hci_stack->state = HCI_STATE_HALTING; 2731 break; 2732 case HCI_POWER_SLEEP: 2733 // do nothing 2734 break; 2735 } 2736 break; 2737 2738 case HCI_STATE_SLEEPING: 2739 switch (power_mode){ 2740 case HCI_POWER_ON: 2741 2742 #ifdef HAVE_PLATFORM_IPHONE_OS 2743 // nothing to do, if H4 supports power management 2744 if (btstack_control_iphone_power_management_enabled()){ 2745 hci_stack->state = HCI_STATE_INITIALIZING; 2746 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2747 hci_update_scan_enable(); 2748 break; 2749 } 2750 #endif 2751 err = hci_power_control_wake(); 2752 if (err) return err; 2753 hci_power_transition_to_initializing(); 2754 break; 2755 case HCI_POWER_OFF: 2756 hci_stack->state = HCI_STATE_HALTING; 2757 break; 2758 case HCI_POWER_SLEEP: 2759 // do nothing 2760 break; 2761 } 2762 break; 2763 } 2764 2765 // create internal event 2766 hci_emit_state(); 2767 2768 // trigger next/first action 2769 hci_run(); 2770 2771 return 0; 2772 } 2773 2774 2775 #ifdef ENABLE_CLASSIC 2776 2777 static void hci_update_scan_enable(void){ 2778 // 2 = page scan, 1 = inq scan 2779 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2780 hci_run(); 2781 } 2782 2783 void gap_discoverable_control(uint8_t enable){ 2784 if (enable) enable = 1; // normalize argument 2785 2786 if (hci_stack->discoverable == enable){ 2787 hci_emit_discoverable_enabled(hci_stack->discoverable); 2788 return; 2789 } 2790 2791 hci_stack->discoverable = enable; 2792 hci_update_scan_enable(); 2793 } 2794 2795 void gap_connectable_control(uint8_t enable){ 2796 if (enable) enable = 1; // normalize argument 2797 2798 // don't emit event 2799 if (hci_stack->connectable == enable) return; 2800 2801 hci_stack->connectable = enable; 2802 hci_update_scan_enable(); 2803 } 2804 #endif 2805 2806 void gap_local_bd_addr(bd_addr_t address_buffer){ 2807 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2808 } 2809 2810 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2811 static void hci_host_num_completed_packets(void){ 2812 2813 // create packet manually as arrays are not supported and num_commands should not get reduced 2814 hci_reserve_packet_buffer(); 2815 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2816 2817 uint16_t size = 0; 2818 uint16_t num_handles = 0; 2819 packet[size++] = 0x35; 2820 packet[size++] = 0x0c; 2821 size++; // skip param len 2822 size++; // skip num handles 2823 2824 // add { handle, packets } entries 2825 btstack_linked_item_t * it; 2826 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2827 hci_connection_t * connection = (hci_connection_t *) it; 2828 if (connection->num_packets_completed){ 2829 little_endian_store_16(packet, size, connection->con_handle); 2830 size += 2; 2831 little_endian_store_16(packet, size, connection->num_packets_completed); 2832 size += 2; 2833 // 2834 num_handles++; 2835 connection->num_packets_completed = 0; 2836 } 2837 } 2838 2839 packet[2] = size - 3; 2840 packet[3] = num_handles; 2841 2842 hci_stack->host_completed_packets = 0; 2843 2844 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2845 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2846 2847 // release packet buffer for synchronous transport implementations 2848 if (hci_transport_synchronous()){ 2849 hci_stack->hci_packet_buffer_reserved = 0; 2850 } 2851 } 2852 #endif 2853 2854 static void hci_run(void){ 2855 2856 // log_info("hci_run: entered"); 2857 btstack_linked_item_t * it; 2858 2859 // send continuation fragments first, as they block the prepared packet buffer 2860 if (hci_stack->acl_fragmentation_total_size > 0) { 2861 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2862 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2863 if (connection) { 2864 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2865 hci_send_acl_packet_fragments(connection); 2866 return; 2867 } 2868 } else { 2869 // connection gone -> discard further fragments 2870 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2871 hci_stack->acl_fragmentation_total_size = 0; 2872 hci_stack->acl_fragmentation_pos = 0; 2873 } 2874 } 2875 2876 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2877 // send host num completed packets next as they don't require num_cmd_packets > 0 2878 if (!hci_can_send_comand_packet_transport()) return; 2879 if (hci_stack->host_completed_packets){ 2880 hci_host_num_completed_packets(); 2881 return; 2882 } 2883 #endif 2884 2885 if (!hci_can_send_command_packet_now()) return; 2886 2887 // global/non-connection oriented commands 2888 2889 #ifdef ENABLE_CLASSIC 2890 // decline incoming connections 2891 if (hci_stack->decline_reason){ 2892 uint8_t reason = hci_stack->decline_reason; 2893 hci_stack->decline_reason = 0; 2894 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2895 return; 2896 } 2897 // send scan enable 2898 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2899 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2900 hci_stack->new_scan_enable_value = 0xff; 2901 return; 2902 } 2903 // start/stop inquiry 2904 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2905 uint8_t duration = hci_stack->inquiry_state; 2906 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2907 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2908 return; 2909 } 2910 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2911 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2912 hci_send_cmd(&hci_inquiry_cancel); 2913 return; 2914 } 2915 // remote name request 2916 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2917 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2918 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2919 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2920 return; 2921 } 2922 // pairing 2923 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2924 uint8_t state = hci_stack->gap_pairing_state; 2925 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2926 switch (state){ 2927 case GAP_PAIRING_STATE_SEND_PIN: 2928 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2929 break; 2930 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2931 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2932 break; 2933 case GAP_PAIRING_STATE_SEND_PASSKEY: 2934 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2935 break; 2936 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2937 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2938 break; 2939 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2940 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2941 break; 2942 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2943 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2944 break; 2945 default: 2946 break; 2947 } 2948 return; 2949 } 2950 #endif 2951 2952 #ifdef ENABLE_BLE 2953 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2954 if ((hci_stack->state == HCI_STATE_WORKING) 2955 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2956 2957 #ifdef ENABLE_LE_CENTRAL 2958 // handle le scan 2959 switch(hci_stack->le_scanning_state){ 2960 case LE_START_SCAN: 2961 hci_stack->le_scanning_state = LE_SCANNING; 2962 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2963 return; 2964 2965 case LE_STOP_SCAN: 2966 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2967 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2968 return; 2969 default: 2970 break; 2971 } 2972 if (hci_stack->le_scan_type != 0xff){ 2973 // defaults: active scanning, accept all advertisement packets 2974 int scan_type = hci_stack->le_scan_type; 2975 hci_stack->le_scan_type = 0xff; 2976 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); 2977 return; 2978 } 2979 #endif 2980 #ifdef ENABLE_LE_PERIPHERAL 2981 // le advertisement control 2982 if (hci_stack->le_advertisements_todo){ 2983 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2984 } 2985 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2986 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2987 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2988 return; 2989 } 2990 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2991 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2992 hci_send_cmd(&hci_le_set_advertising_parameters, 2993 hci_stack->le_advertisements_interval_min, 2994 hci_stack->le_advertisements_interval_max, 2995 hci_stack->le_advertisements_type, 2996 hci_stack->le_own_addr_type, 2997 hci_stack->le_advertisements_direct_address_type, 2998 hci_stack->le_advertisements_direct_address, 2999 hci_stack->le_advertisements_channel_map, 3000 hci_stack->le_advertisements_filter_policy); 3001 return; 3002 } 3003 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3004 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3005 uint8_t adv_data_clean[31]; 3006 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3007 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3008 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3009 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3010 return; 3011 } 3012 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3013 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3014 uint8_t scan_data_clean[31]; 3015 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3016 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3017 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3018 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3019 return; 3020 } 3021 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3022 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3023 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3024 return; 3025 } 3026 #endif 3027 3028 #ifdef ENABLE_LE_CENTRAL 3029 // 3030 // LE Whitelist Management 3031 // 3032 3033 // check if whitelist needs modification 3034 btstack_linked_list_iterator_t lit; 3035 int modification_pending = 0; 3036 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3037 while (btstack_linked_list_iterator_has_next(&lit)){ 3038 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3039 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3040 modification_pending = 1; 3041 break; 3042 } 3043 } 3044 3045 if (modification_pending){ 3046 // stop connnecting if modification pending 3047 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3048 hci_send_cmd(&hci_le_create_connection_cancel); 3049 return; 3050 } 3051 3052 // add/remove entries 3053 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3054 while (btstack_linked_list_iterator_has_next(&lit)){ 3055 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3056 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3057 entry->state = LE_WHITELIST_ON_CONTROLLER; 3058 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3059 return; 3060 3061 } 3062 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3063 bd_addr_t address; 3064 bd_addr_type_t address_type = entry->address_type; 3065 memcpy(address, entry->address, 6); 3066 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3067 btstack_memory_whitelist_entry_free(entry); 3068 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3069 return; 3070 } 3071 } 3072 } 3073 3074 // start connecting 3075 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3076 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3077 bd_addr_t null_addr; 3078 memset(null_addr, 0, 6); 3079 hci_send_cmd(&hci_le_create_connection, 3080 0x0060, // scan interval: 60 ms 3081 0x0030, // scan interval: 30 ms 3082 1, // use whitelist 3083 0, // peer address type 3084 null_addr, // peer bd addr 3085 hci_stack->le_own_addr_type, // our addr type: 3086 hci_stack->le_connection_interval_min, // conn interval min 3087 hci_stack->le_connection_interval_max, // conn interval max 3088 hci_stack->le_connection_latency, // conn latency 3089 hci_stack->le_supervision_timeout, // conn latency 3090 hci_stack->le_minimum_ce_length, // min ce length 3091 hci_stack->le_maximum_ce_length // max ce length 3092 ); 3093 return; 3094 } 3095 #endif 3096 } 3097 #endif 3098 3099 // send pending HCI commands 3100 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3101 hci_connection_t * connection = (hci_connection_t *) it; 3102 3103 switch(connection->state){ 3104 case SEND_CREATE_CONNECTION: 3105 switch(connection->address_type){ 3106 #ifdef ENABLE_CLASSIC 3107 case BD_ADDR_TYPE_CLASSIC: 3108 log_info("sending hci_create_connection"); 3109 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3110 break; 3111 #endif 3112 default: 3113 #ifdef ENABLE_BLE 3114 #ifdef ENABLE_LE_CENTRAL 3115 log_info("sending hci_le_create_connection"); 3116 hci_send_cmd(&hci_le_create_connection, 3117 0x0060, // scan interval: 60 ms 3118 0x0030, // scan interval: 30 ms 3119 0, // don't use whitelist 3120 connection->address_type, // peer address type 3121 connection->address, // peer bd addr 3122 hci_stack->le_own_addr_type, // our addr type: 3123 hci_stack->le_connection_interval_min, // conn interval min 3124 hci_stack->le_connection_interval_max, // conn interval max 3125 hci_stack->le_connection_latency, // conn latency 3126 hci_stack->le_supervision_timeout, // conn latency 3127 hci_stack->le_minimum_ce_length, // min ce length 3128 hci_stack->le_maximum_ce_length // max ce length 3129 ); 3130 connection->state = SENT_CREATE_CONNECTION; 3131 #endif 3132 #endif 3133 break; 3134 } 3135 return; 3136 3137 #ifdef ENABLE_CLASSIC 3138 case RECEIVED_CONNECTION_REQUEST: 3139 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3140 connection->state = ACCEPTED_CONNECTION_REQUEST; 3141 connection->role = HCI_ROLE_SLAVE; 3142 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3143 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3144 } 3145 return; 3146 #endif 3147 3148 #ifdef ENABLE_BLE 3149 #ifdef ENABLE_LE_CENTRAL 3150 case SEND_CANCEL_CONNECTION: 3151 connection->state = SENT_CANCEL_CONNECTION; 3152 hci_send_cmd(&hci_le_create_connection_cancel); 3153 return; 3154 #endif 3155 #endif 3156 case SEND_DISCONNECT: 3157 connection->state = SENT_DISCONNECT; 3158 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3159 return; 3160 3161 default: 3162 break; 3163 } 3164 3165 #ifdef ENABLE_CLASSIC 3166 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3167 log_info("responding to link key request"); 3168 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3169 link_key_t link_key; 3170 link_key_type_t link_key_type; 3171 if ( hci_stack->link_key_db 3172 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3173 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3174 connection->link_key_type = link_key_type; 3175 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3176 } else { 3177 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3178 } 3179 return; 3180 } 3181 3182 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3183 log_info("denying to pin request"); 3184 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3185 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3186 return; 3187 } 3188 3189 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3190 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3191 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3192 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3193 // tweak authentication requirements 3194 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3195 if (connection->bonding_flags & BONDING_DEDICATED){ 3196 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3197 } 3198 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3199 authreq |= 1; 3200 } 3201 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3202 } else { 3203 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3204 } 3205 return; 3206 } 3207 3208 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3209 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3210 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3211 return; 3212 } 3213 3214 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3215 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3216 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3217 return; 3218 } 3219 3220 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3221 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3222 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3223 return; 3224 } 3225 3226 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3227 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3228 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3229 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3230 return; 3231 } 3232 3233 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3234 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3235 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3236 return; 3237 } 3238 3239 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3240 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3241 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3242 return; 3243 } 3244 #endif 3245 3246 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3247 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3248 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3249 return; 3250 } 3251 3252 #ifdef ENABLE_BLE 3253 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3254 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3255 3256 uint16_t connection_interval_min = connection->le_conn_interval_min; 3257 connection->le_conn_interval_min = 0; 3258 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3259 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3260 0x0000, 0xffff); 3261 } 3262 #endif 3263 } 3264 3265 hci_connection_t * connection; 3266 switch (hci_stack->state){ 3267 case HCI_STATE_INITIALIZING: 3268 hci_initializing_run(); 3269 break; 3270 3271 case HCI_STATE_HALTING: 3272 3273 log_info("HCI_STATE_HALTING"); 3274 3275 // free whitelist entries 3276 #ifdef ENABLE_BLE 3277 #ifdef ENABLE_LE_CENTRAL 3278 { 3279 btstack_linked_list_iterator_t lit; 3280 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3281 while (btstack_linked_list_iterator_has_next(&lit)){ 3282 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3283 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3284 btstack_memory_whitelist_entry_free(entry); 3285 } 3286 } 3287 #endif 3288 #endif 3289 // close all open connections 3290 connection = (hci_connection_t *) hci_stack->connections; 3291 if (connection){ 3292 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3293 if (!hci_can_send_command_packet_now()) return; 3294 3295 // check state 3296 if (connection->state == SENT_DISCONNECT) return; 3297 connection->state = SENT_DISCONNECT; 3298 3299 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3300 3301 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3302 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3303 3304 // ... which would be ignored anyway as we shutdown (free) the connection now 3305 hci_shutdown_connection(connection); 3306 3307 // finally, send the disconnect command 3308 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3309 return; 3310 } 3311 log_info("HCI_STATE_HALTING, calling off"); 3312 3313 // switch mode 3314 hci_power_control_off(); 3315 3316 log_info("HCI_STATE_HALTING, emitting state"); 3317 hci_emit_state(); 3318 log_info("HCI_STATE_HALTING, done"); 3319 break; 3320 3321 case HCI_STATE_FALLING_ASLEEP: 3322 switch(hci_stack->substate) { 3323 case HCI_FALLING_ASLEEP_DISCONNECT: 3324 log_info("HCI_STATE_FALLING_ASLEEP"); 3325 // close all open connections 3326 connection = (hci_connection_t *) hci_stack->connections; 3327 3328 #ifdef HAVE_PLATFORM_IPHONE_OS 3329 // don't close connections, if H4 supports power management 3330 if (btstack_control_iphone_power_management_enabled()){ 3331 connection = NULL; 3332 } 3333 #endif 3334 if (connection){ 3335 3336 // send disconnect 3337 if (!hci_can_send_command_packet_now()) return; 3338 3339 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3340 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3341 3342 // send disconnected event right away - causes higher layer connections to get closed, too. 3343 hci_shutdown_connection(connection); 3344 return; 3345 } 3346 3347 if (hci_classic_supported()){ 3348 // disable page and inquiry scan 3349 if (!hci_can_send_command_packet_now()) return; 3350 3351 log_info("HCI_STATE_HALTING, disabling inq scans"); 3352 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3353 3354 // continue in next sub state 3355 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3356 break; 3357 } 3358 // no break - fall through for ble-only chips 3359 3360 case HCI_FALLING_ASLEEP_COMPLETE: 3361 log_info("HCI_STATE_HALTING, calling sleep"); 3362 #ifdef HAVE_PLATFORM_IPHONE_OS 3363 // don't actually go to sleep, if H4 supports power management 3364 if (btstack_control_iphone_power_management_enabled()){ 3365 // SLEEP MODE reached 3366 hci_stack->state = HCI_STATE_SLEEPING; 3367 hci_emit_state(); 3368 break; 3369 } 3370 #endif 3371 // switch mode 3372 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3373 hci_emit_state(); 3374 break; 3375 3376 default: 3377 break; 3378 } 3379 break; 3380 3381 default: 3382 break; 3383 } 3384 } 3385 3386 int hci_send_cmd_packet(uint8_t *packet, int size){ 3387 // house-keeping 3388 3389 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3390 hci_stack->loopback_mode = packet[3]; 3391 } 3392 3393 #ifdef ENABLE_CLASSIC 3394 bd_addr_t addr; 3395 hci_connection_t * conn; 3396 3397 // create_connection? 3398 if (IS_COMMAND(packet, hci_create_connection)){ 3399 reverse_bd_addr(&packet[3], addr); 3400 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3401 3402 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3403 if (!conn){ 3404 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3405 if (!conn){ 3406 // notify client that alloc failed 3407 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3408 return 0; // don't sent packet to controller 3409 } 3410 conn->state = SEND_CREATE_CONNECTION; 3411 } 3412 log_info("conn state %u", conn->state); 3413 switch (conn->state){ 3414 // if connection active exists 3415 case OPEN: 3416 // and OPEN, emit connection complete command, don't send to controller 3417 hci_emit_connection_complete(addr, conn->con_handle, 0); 3418 return 0; 3419 case SEND_CREATE_CONNECTION: 3420 // connection created by hci, e.g. dedicated bonding 3421 break; 3422 default: 3423 // otherwise, just ignore as it is already in the open process 3424 return 0; 3425 } 3426 conn->state = SENT_CREATE_CONNECTION; 3427 } 3428 3429 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3430 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3431 } 3432 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3433 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3434 } 3435 3436 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3437 if (hci_stack->link_key_db){ 3438 reverse_bd_addr(&packet[3], addr); 3439 hci_stack->link_key_db->delete_link_key(addr); 3440 } 3441 } 3442 3443 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3444 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3445 reverse_bd_addr(&packet[3], addr); 3446 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3447 if (conn){ 3448 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3449 } 3450 } 3451 3452 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3453 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3454 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3455 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3456 reverse_bd_addr(&packet[3], addr); 3457 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3458 if (conn){ 3459 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3460 } 3461 } 3462 3463 #ifdef ENABLE_SCO_OVER_HCI 3464 // setup_synchronous_connection? Voice setting at offset 22 3465 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3466 // TODO: compare to current setting if sco connection already active 3467 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3468 } 3469 // accept_synchronus_connection? Voice setting at offset 18 3470 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3471 // TODO: compare to current setting if sco connection already active 3472 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3473 } 3474 #endif 3475 #endif 3476 3477 #ifdef ENABLE_BLE 3478 #ifdef ENABLE_LE_PERIPHERAL 3479 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3480 hci_stack->le_random_address_set = 1; 3481 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3482 } 3483 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3484 hci_stack->le_advertisements_active = packet[3]; 3485 } 3486 #endif 3487 #ifdef ENABLE_LE_CENTRAL 3488 if (IS_COMMAND(packet, hci_le_create_connection)){ 3489 // white list used? 3490 uint8_t initiator_filter_policy = packet[7]; 3491 switch (initiator_filter_policy){ 3492 case 0: 3493 // whitelist not used 3494 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3495 break; 3496 case 1: 3497 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3498 break; 3499 default: 3500 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3501 break; 3502 } 3503 } 3504 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3505 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3506 } 3507 #endif 3508 #endif 3509 3510 hci_stack->num_cmd_packets--; 3511 3512 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3513 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3514 3515 // release packet buffer for synchronous transport implementations 3516 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3517 hci_stack->hci_packet_buffer_reserved = 0; 3518 } 3519 3520 return err; 3521 } 3522 3523 // disconnect because of security block 3524 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3525 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3526 if (!connection) return; 3527 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3528 } 3529 3530 3531 // Configure Secure Simple Pairing 3532 3533 #ifdef ENABLE_CLASSIC 3534 3535 // enable will enable SSP during init 3536 void gap_ssp_set_enable(int enable){ 3537 hci_stack->ssp_enable = enable; 3538 } 3539 3540 static int hci_local_ssp_activated(void){ 3541 return gap_ssp_supported() && hci_stack->ssp_enable; 3542 } 3543 3544 // if set, BTstack will respond to io capability request using authentication requirement 3545 void gap_ssp_set_io_capability(int io_capability){ 3546 hci_stack->ssp_io_capability = io_capability; 3547 } 3548 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3549 hci_stack->ssp_authentication_requirement = authentication_requirement; 3550 } 3551 3552 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3553 void gap_ssp_set_auto_accept(int auto_accept){ 3554 hci_stack->ssp_auto_accept = auto_accept; 3555 } 3556 #endif 3557 3558 // va_list part of hci_send_cmd 3559 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3560 if (!hci_can_send_command_packet_now()){ 3561 log_error("hci_send_cmd called but cannot send packet now"); 3562 return 0; 3563 } 3564 3565 // for HCI INITIALIZATION 3566 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3567 hci_stack->last_cmd_opcode = cmd->opcode; 3568 3569 hci_reserve_packet_buffer(); 3570 uint8_t * packet = hci_stack->hci_packet_buffer; 3571 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3572 return hci_send_cmd_packet(packet, size); 3573 } 3574 3575 /** 3576 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3577 */ 3578 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3579 va_list argptr; 3580 va_start(argptr, cmd); 3581 int res = hci_send_cmd_va_arg(cmd, argptr); 3582 va_end(argptr); 3583 return res; 3584 } 3585 3586 // Create various non-HCI events. 3587 // TODO: generalize, use table similar to hci_create_command 3588 3589 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3590 // dump packet 3591 if (dump) { 3592 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3593 } 3594 3595 // dispatch to all event handlers 3596 btstack_linked_list_iterator_t it; 3597 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3598 while (btstack_linked_list_iterator_has_next(&it)){ 3599 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3600 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3601 } 3602 } 3603 3604 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3605 if (!hci_stack->acl_packet_handler) return; 3606 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3607 } 3608 3609 #ifdef ENABLE_CLASSIC 3610 static void hci_notify_if_sco_can_send_now(void){ 3611 // notify SCO sender if waiting 3612 if (!hci_stack->sco_waiting_for_can_send_now) return; 3613 if (hci_can_send_sco_packet_now()){ 3614 hci_stack->sco_waiting_for_can_send_now = 0; 3615 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3616 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3617 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3618 } 3619 } 3620 3621 // parsing end emitting has been merged to reduce code size 3622 static void gap_inquiry_explode(uint8_t * packet){ 3623 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3624 3625 uint8_t * eir_data; 3626 ad_context_t context; 3627 const uint8_t * name; 3628 uint8_t name_len; 3629 3630 int event_type = hci_event_packet_get_type(packet); 3631 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3632 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3633 3634 // event[1] is set at the end 3635 int i; 3636 for (i=0; i<num_responses;i++){ 3637 memset(event, 0, sizeof(event)); 3638 event[0] = GAP_EVENT_INQUIRY_RESULT; 3639 uint8_t event_size = 18; // if name is not set by EIR 3640 3641 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3642 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3643 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3644 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3645 3646 switch (event_type){ 3647 case HCI_EVENT_INQUIRY_RESULT: 3648 // 14,15,16,17 = 0, size 18 3649 break; 3650 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3651 event[14] = 1; 3652 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3653 // 16,17 = 0, size 18 3654 break; 3655 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3656 event[14] = 1; 3657 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3658 // for EIR packets, there is only one reponse in it 3659 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3660 name = NULL; 3661 // EIR data is 240 bytes in EIR event 3662 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3663 uint8_t data_type = ad_iterator_get_data_type(&context); 3664 uint8_t data_size = ad_iterator_get_data_len(&context); 3665 const uint8_t * data = ad_iterator_get_data(&context); 3666 // Prefer Complete Local Name over Shortend Local Name 3667 switch (data_type){ 3668 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3669 if (name) continue; 3670 /* explicit fall-through */ 3671 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3672 name = data; 3673 name_len = data_size; 3674 break; 3675 default: 3676 break; 3677 } 3678 } 3679 if (name){ 3680 event[16] = 1; 3681 // truncate name if needed 3682 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3683 event[17] = len; 3684 memcpy(&event[18], name, len); 3685 event_size += len; 3686 } 3687 break; 3688 } 3689 event[1] = event_size - 2; 3690 hci_emit_event(event, event_size, 1); 3691 } 3692 } 3693 #endif 3694 3695 void hci_emit_state(void){ 3696 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3697 uint8_t event[3]; 3698 event[0] = BTSTACK_EVENT_STATE; 3699 event[1] = sizeof(event) - 2; 3700 event[2] = hci_stack->state; 3701 hci_emit_event(event, sizeof(event), 1); 3702 } 3703 3704 #ifdef ENABLE_CLASSIC 3705 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3706 uint8_t event[13]; 3707 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3708 event[1] = sizeof(event) - 2; 3709 event[2] = status; 3710 little_endian_store_16(event, 3, con_handle); 3711 reverse_bd_addr(address, &event[5]); 3712 event[11] = 1; // ACL connection 3713 event[12] = 0; // encryption disabled 3714 hci_emit_event(event, sizeof(event), 1); 3715 } 3716 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3717 if (disable_l2cap_timeouts) return; 3718 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3719 uint8_t event[4]; 3720 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3721 event[1] = sizeof(event) - 2; 3722 little_endian_store_16(event, 2, conn->con_handle); 3723 hci_emit_event(event, sizeof(event), 1); 3724 } 3725 #endif 3726 3727 #ifdef ENABLE_BLE 3728 #ifdef ENABLE_LE_CENTRAL 3729 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3730 uint8_t event[21]; 3731 event[0] = HCI_EVENT_LE_META; 3732 event[1] = sizeof(event) - 2; 3733 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3734 event[3] = status; 3735 little_endian_store_16(event, 4, con_handle); 3736 event[6] = 0; // TODO: role 3737 event[7] = address_type; 3738 reverse_bd_addr(address, &event[8]); 3739 little_endian_store_16(event, 14, 0); // interval 3740 little_endian_store_16(event, 16, 0); // latency 3741 little_endian_store_16(event, 18, 0); // supervision timeout 3742 event[20] = 0; // master clock accuracy 3743 hci_emit_event(event, sizeof(event), 1); 3744 } 3745 #endif 3746 #endif 3747 3748 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3749 uint8_t event[6]; 3750 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3751 event[1] = sizeof(event) - 2; 3752 event[2] = 0; // status = OK 3753 little_endian_store_16(event, 3, con_handle); 3754 event[5] = reason; 3755 hci_emit_event(event, sizeof(event), 1); 3756 } 3757 3758 static void hci_emit_nr_connections_changed(void){ 3759 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3760 uint8_t event[3]; 3761 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3762 event[1] = sizeof(event) - 2; 3763 event[2] = nr_hci_connections(); 3764 hci_emit_event(event, sizeof(event), 1); 3765 } 3766 3767 static void hci_emit_hci_open_failed(void){ 3768 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3769 uint8_t event[2]; 3770 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3771 event[1] = sizeof(event) - 2; 3772 hci_emit_event(event, sizeof(event), 1); 3773 } 3774 3775 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3776 log_info("hci_emit_dedicated_bonding_result %u ", status); 3777 uint8_t event[9]; 3778 int pos = 0; 3779 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3780 event[pos++] = sizeof(event) - 2; 3781 event[pos++] = status; 3782 reverse_bd_addr(address, &event[pos]); 3783 hci_emit_event(event, sizeof(event), 1); 3784 } 3785 3786 3787 #ifdef ENABLE_CLASSIC 3788 3789 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3790 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3791 uint8_t event[5]; 3792 int pos = 0; 3793 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3794 event[pos++] = sizeof(event) - 2; 3795 little_endian_store_16(event, 2, con_handle); 3796 pos += 2; 3797 event[pos++] = level; 3798 hci_emit_event(event, sizeof(event), 1); 3799 } 3800 3801 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3802 if (!connection) return LEVEL_0; 3803 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3804 return gap_security_level_for_link_key_type(connection->link_key_type); 3805 } 3806 3807 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3808 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3809 uint8_t event[3]; 3810 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3811 event[1] = sizeof(event) - 2; 3812 event[2] = enabled; 3813 hci_emit_event(event, sizeof(event), 1); 3814 } 3815 3816 #ifdef ENABLE_CLASSIC 3817 // query if remote side supports eSCO 3818 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3819 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3820 if (!connection) return 0; 3821 return connection->remote_supported_feature_eSCO; 3822 } 3823 3824 // query if remote side supports SSP 3825 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3826 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3827 if (!connection) return 0; 3828 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3829 } 3830 3831 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3832 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3833 } 3834 #endif 3835 3836 // GAP API 3837 /** 3838 * @bbrief enable/disable bonding. default is enabled 3839 * @praram enabled 3840 */ 3841 void gap_set_bondable_mode(int enable){ 3842 hci_stack->bondable = enable ? 1 : 0; 3843 } 3844 /** 3845 * @brief Get bondable mode. 3846 * @return 1 if bondable 3847 */ 3848 int gap_get_bondable_mode(void){ 3849 return hci_stack->bondable; 3850 } 3851 3852 /** 3853 * @brief map link keys to security levels 3854 */ 3855 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3856 switch (link_key_type){ 3857 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3858 return LEVEL_4; 3859 case COMBINATION_KEY: 3860 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3861 return LEVEL_3; 3862 default: 3863 return LEVEL_2; 3864 } 3865 } 3866 3867 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3868 log_info("gap_mitm_protection_required_for_security_level %u", level); 3869 return level > LEVEL_2; 3870 } 3871 3872 /** 3873 * @brief get current security level 3874 */ 3875 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3876 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3877 if (!connection) return LEVEL_0; 3878 return gap_security_level_for_connection(connection); 3879 } 3880 3881 /** 3882 * @brief request connection to device to 3883 * @result GAP_AUTHENTICATION_RESULT 3884 */ 3885 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3886 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3887 if (!connection){ 3888 hci_emit_security_level(con_handle, LEVEL_0); 3889 return; 3890 } 3891 gap_security_level_t current_level = gap_security_level(con_handle); 3892 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3893 if (current_level >= requested_level){ 3894 hci_emit_security_level(con_handle, current_level); 3895 return; 3896 } 3897 3898 connection->requested_security_level = requested_level; 3899 3900 #if 0 3901 // sending encryption request without a link key results in an error. 3902 // TODO: figure out how to use it properly 3903 3904 // would enabling ecnryption suffice (>= LEVEL_2)? 3905 if (hci_stack->link_key_db){ 3906 link_key_type_t link_key_type; 3907 link_key_t link_key; 3908 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3909 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3910 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3911 return; 3912 } 3913 } 3914 } 3915 #endif 3916 3917 // try to authenticate connection 3918 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3919 hci_run(); 3920 } 3921 3922 /** 3923 * @brief start dedicated bonding with device. disconnect after bonding 3924 * @param device 3925 * @param request MITM protection 3926 * @result GAP_DEDICATED_BONDING_COMPLETE 3927 */ 3928 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3929 3930 // create connection state machine 3931 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3932 3933 if (!connection){ 3934 return BTSTACK_MEMORY_ALLOC_FAILED; 3935 } 3936 3937 // delete linkn key 3938 gap_drop_link_key_for_bd_addr(device); 3939 3940 // configure LEVEL_2/3, dedicated bonding 3941 connection->state = SEND_CREATE_CONNECTION; 3942 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3943 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3944 connection->bonding_flags = BONDING_DEDICATED; 3945 3946 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3947 3948 // handle: connnection failure (connection complete != ok) 3949 // handle: authentication failure 3950 // handle: disconnect on done 3951 3952 hci_run(); 3953 3954 return 0; 3955 } 3956 #endif 3957 3958 void gap_set_local_name(const char * local_name){ 3959 hci_stack->local_name = local_name; 3960 } 3961 3962 3963 #ifdef ENABLE_BLE 3964 3965 #ifdef ENABLE_LE_CENTRAL 3966 void gap_start_scan(void){ 3967 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3968 hci_stack->le_scanning_state = LE_START_SCAN; 3969 hci_run(); 3970 } 3971 3972 void gap_stop_scan(void){ 3973 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3974 hci_stack->le_scanning_state = LE_STOP_SCAN; 3975 hci_run(); 3976 } 3977 3978 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3979 hci_stack->le_scan_type = scan_type; 3980 hci_stack->le_scan_interval = scan_interval; 3981 hci_stack->le_scan_window = scan_window; 3982 hci_run(); 3983 } 3984 3985 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3986 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3987 if (!conn){ 3988 log_info("gap_connect: no connection exists yet, creating context"); 3989 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3990 if (!conn){ 3991 // notify client that alloc failed 3992 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3993 log_info("gap_connect: failed to alloc hci_connection_t"); 3994 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3995 } 3996 conn->state = SEND_CREATE_CONNECTION; 3997 log_info("gap_connect: send create connection next"); 3998 hci_run(); 3999 return 0; 4000 } 4001 4002 if (!hci_is_le_connection(conn) || 4003 conn->state == SEND_CREATE_CONNECTION || 4004 conn->state == SENT_CREATE_CONNECTION) { 4005 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4006 log_error("gap_connect: classic connection or connect is already being created"); 4007 return GATT_CLIENT_IN_WRONG_STATE; 4008 } 4009 4010 log_info("gap_connect: context exists with state %u", conn->state); 4011 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4012 hci_run(); 4013 return 0; 4014 } 4015 4016 // @assumption: only a single outgoing LE Connection exists 4017 static hci_connection_t * gap_get_outgoing_connection(void){ 4018 btstack_linked_item_t *it; 4019 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4020 hci_connection_t * conn = (hci_connection_t *) it; 4021 if (!hci_is_le_connection(conn)) continue; 4022 switch (conn->state){ 4023 case SEND_CREATE_CONNECTION: 4024 case SENT_CREATE_CONNECTION: 4025 return conn; 4026 default: 4027 break; 4028 }; 4029 } 4030 return NULL; 4031 } 4032 4033 uint8_t gap_connect_cancel(void){ 4034 hci_connection_t * conn = gap_get_outgoing_connection(); 4035 if (!conn) return 0; 4036 switch (conn->state){ 4037 case SEND_CREATE_CONNECTION: 4038 // skip sending create connection and emit event instead 4039 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4040 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4041 btstack_memory_hci_connection_free( conn ); 4042 break; 4043 case SENT_CREATE_CONNECTION: 4044 // request to send cancel connection 4045 conn->state = SEND_CANCEL_CONNECTION; 4046 hci_run(); 4047 break; 4048 default: 4049 break; 4050 } 4051 return 0; 4052 } 4053 #endif 4054 4055 #ifdef ENABLE_LE_CENTRAL 4056 /** 4057 * @brief Set connection parameters for outgoing connections 4058 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4059 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4060 * @param conn_latency, default: 4 4061 * @param supervision_timeout (unit: 10ms), default: 720 ms 4062 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4063 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4064 */ 4065 4066 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 4067 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4068 hci_stack->le_connection_interval_min = conn_interval_min; 4069 hci_stack->le_connection_interval_max = conn_interval_max; 4070 hci_stack->le_connection_latency = conn_latency; 4071 hci_stack->le_supervision_timeout = supervision_timeout; 4072 hci_stack->le_minimum_ce_length = min_ce_length; 4073 hci_stack->le_maximum_ce_length = max_ce_length; 4074 } 4075 #endif 4076 4077 /** 4078 * @brief Updates the connection parameters for a given LE connection 4079 * @param handle 4080 * @param conn_interval_min (unit: 1.25ms) 4081 * @param conn_interval_max (unit: 1.25ms) 4082 * @param conn_latency 4083 * @param supervision_timeout (unit: 10ms) 4084 * @returns 0 if ok 4085 */ 4086 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4087 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4088 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4089 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4090 connection->le_conn_interval_min = conn_interval_min; 4091 connection->le_conn_interval_max = conn_interval_max; 4092 connection->le_conn_latency = conn_latency; 4093 connection->le_supervision_timeout = supervision_timeout; 4094 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4095 hci_run(); 4096 return 0; 4097 } 4098 4099 /** 4100 * @brief Request an update of the connection parameter for a given LE connection 4101 * @param handle 4102 * @param conn_interval_min (unit: 1.25ms) 4103 * @param conn_interval_max (unit: 1.25ms) 4104 * @param conn_latency 4105 * @param supervision_timeout (unit: 10ms) 4106 * @returns 0 if ok 4107 */ 4108 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4109 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4110 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4111 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4112 connection->le_conn_interval_min = conn_interval_min; 4113 connection->le_conn_interval_max = conn_interval_max; 4114 connection->le_conn_latency = conn_latency; 4115 connection->le_supervision_timeout = supervision_timeout; 4116 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4117 hci_run(); 4118 return 0; 4119 } 4120 4121 #ifdef ENABLE_LE_PERIPHERAL 4122 4123 static void gap_advertisments_changed(void){ 4124 // disable advertisements before updating adv, scan data, or adv params 4125 if (hci_stack->le_advertisements_active){ 4126 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4127 } 4128 hci_run(); 4129 } 4130 4131 /** 4132 * @brief Set Advertisement Data 4133 * @param advertising_data_length 4134 * @param advertising_data (max 31 octets) 4135 * @note data is not copied, pointer has to stay valid 4136 */ 4137 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4138 hci_stack->le_advertisements_data_len = advertising_data_length; 4139 hci_stack->le_advertisements_data = advertising_data; 4140 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4141 gap_advertisments_changed(); 4142 } 4143 4144 /** 4145 * @brief Set Scan Response Data 4146 * @param advertising_data_length 4147 * @param advertising_data (max 31 octets) 4148 * @note data is not copied, pointer has to stay valid 4149 */ 4150 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4151 hci_stack->le_scan_response_data_len = scan_response_data_length; 4152 hci_stack->le_scan_response_data = scan_response_data; 4153 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4154 gap_advertisments_changed(); 4155 } 4156 4157 /** 4158 * @brief Set Advertisement Parameters 4159 * @param adv_int_min 4160 * @param adv_int_max 4161 * @param adv_type 4162 * @param direct_address_type 4163 * @param direct_address 4164 * @param channel_map 4165 * @param filter_policy 4166 * 4167 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4168 */ 4169 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4170 uint8_t direct_address_typ, bd_addr_t direct_address, 4171 uint8_t channel_map, uint8_t filter_policy) { 4172 4173 hci_stack->le_advertisements_interval_min = adv_int_min; 4174 hci_stack->le_advertisements_interval_max = adv_int_max; 4175 hci_stack->le_advertisements_type = adv_type; 4176 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4177 hci_stack->le_advertisements_channel_map = channel_map; 4178 hci_stack->le_advertisements_filter_policy = filter_policy; 4179 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4180 4181 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4182 gap_advertisments_changed(); 4183 } 4184 4185 /** 4186 * @brief Enable/Disable Advertisements 4187 * @param enabled 4188 */ 4189 void gap_advertisements_enable(int enabled){ 4190 hci_stack->le_advertisements_enabled = enabled; 4191 if (enabled && !hci_stack->le_advertisements_active){ 4192 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4193 } 4194 if (!enabled && hci_stack->le_advertisements_active){ 4195 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4196 } 4197 hci_run(); 4198 } 4199 4200 #endif 4201 4202 void hci_le_set_own_address_type(uint8_t own_address_type){ 4203 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4204 if (own_address_type == hci_stack->le_own_addr_type) return; 4205 hci_stack->le_own_addr_type = own_address_type; 4206 4207 #ifdef ENABLE_LE_PERIPHERAL 4208 // update advertisement parameters, too 4209 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4210 gap_advertisments_changed(); 4211 #endif 4212 #ifdef ENABLE_LE_CENTRAL 4213 // note: we don't update scan parameters or modify ongoing connection attempts 4214 #endif 4215 } 4216 4217 #endif 4218 4219 uint8_t gap_disconnect(hci_con_handle_t handle){ 4220 hci_connection_t * conn = hci_connection_for_handle(handle); 4221 if (!conn){ 4222 hci_emit_disconnection_complete(handle, 0); 4223 return 0; 4224 } 4225 conn->state = SEND_DISCONNECT; 4226 hci_run(); 4227 return 0; 4228 } 4229 4230 /** 4231 * @brief Get connection type 4232 * @param con_handle 4233 * @result connection_type 4234 */ 4235 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4236 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4237 if (!conn) return GAP_CONNECTION_INVALID; 4238 switch (conn->address_type){ 4239 case BD_ADDR_TYPE_LE_PUBLIC: 4240 case BD_ADDR_TYPE_LE_RANDOM: 4241 return GAP_CONNECTION_LE; 4242 case BD_ADDR_TYPE_SCO: 4243 return GAP_CONNECTION_SCO; 4244 case BD_ADDR_TYPE_CLASSIC: 4245 return GAP_CONNECTION_ACL; 4246 default: 4247 return GAP_CONNECTION_INVALID; 4248 } 4249 } 4250 4251 #ifdef ENABLE_BLE 4252 4253 #ifdef ENABLE_LE_CENTRAL 4254 /** 4255 * @brief Auto Connection Establishment - Start Connecting to device 4256 * @param address_typ 4257 * @param address 4258 * @returns 0 if ok 4259 */ 4260 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4261 // check capacity 4262 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4263 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4264 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4265 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4266 entry->address_type = address_type; 4267 memcpy(entry->address, address, 6); 4268 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4269 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4270 hci_run(); 4271 return 0; 4272 } 4273 4274 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4275 btstack_linked_list_iterator_t it; 4276 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4277 while (btstack_linked_list_iterator_has_next(&it)){ 4278 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4279 if (entry->address_type != address_type) continue; 4280 if (memcmp(entry->address, address, 6) != 0) continue; 4281 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4282 // remove from controller if already present 4283 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4284 continue; 4285 } 4286 // direclty remove entry from whitelist 4287 btstack_linked_list_iterator_remove(&it); 4288 btstack_memory_whitelist_entry_free(entry); 4289 } 4290 } 4291 4292 /** 4293 * @brief Auto Connection Establishment - Stop Connecting to device 4294 * @param address_typ 4295 * @param address 4296 * @returns 0 if ok 4297 */ 4298 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4299 hci_remove_from_whitelist(address_type, address); 4300 hci_run(); 4301 return 0; 4302 } 4303 4304 /** 4305 * @brief Auto Connection Establishment - Stop everything 4306 * @note Convenience function to stop all active auto connection attempts 4307 */ 4308 void gap_auto_connection_stop_all(void){ 4309 btstack_linked_list_iterator_t it; 4310 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4311 while (btstack_linked_list_iterator_has_next(&it)){ 4312 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4313 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4314 // remove from controller if already present 4315 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4316 continue; 4317 } 4318 // directly remove entry from whitelist 4319 btstack_linked_list_iterator_remove(&it); 4320 btstack_memory_whitelist_entry_free(entry); 4321 } 4322 hci_run(); 4323 } 4324 #endif 4325 #endif 4326 4327 #ifdef ENABLE_CLASSIC 4328 /** 4329 * @brief Set Extended Inquiry Response data 4330 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4331 * @note has to be done before stack starts up 4332 */ 4333 void gap_set_extended_inquiry_response(const uint8_t * data){ 4334 hci_stack->eir_data = data; 4335 } 4336 4337 /** 4338 * @brief Start GAP Classic Inquiry 4339 * @param duration in 1.28s units 4340 * @return 0 if ok 4341 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4342 */ 4343 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4344 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4345 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4346 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4347 } 4348 hci_stack->inquiry_state = duration_in_1280ms_units; 4349 hci_run(); 4350 return 0; 4351 } 4352 4353 /** 4354 * @brief Stop GAP Classic Inquiry 4355 * @returns 0 if ok 4356 */ 4357 int gap_inquiry_stop(void){ 4358 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4359 // emit inquiry complete event, before it even started 4360 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4361 hci_emit_event(event, sizeof(event), 1); 4362 return 0; 4363 } 4364 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4365 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4366 hci_run(); 4367 return 0; 4368 } 4369 4370 4371 /** 4372 * @brief Remote Name Request 4373 * @param addr 4374 * @param page_scan_repetition_mode 4375 * @param clock_offset only used when bit 15 is set 4376 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4377 */ 4378 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4379 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4380 memcpy(hci_stack->remote_name_addr, addr, 6); 4381 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4382 hci_stack->remote_name_clock_offset = clock_offset; 4383 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4384 hci_run(); 4385 return 0; 4386 } 4387 4388 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4389 hci_stack->gap_pairing_state = state; 4390 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4391 hci_run(); 4392 return 0; 4393 } 4394 4395 /** 4396 * @brief Legacy Pairing Pin Code Response 4397 * @param addr 4398 * @param pin 4399 * @return 0 if ok 4400 */ 4401 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4402 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4403 hci_stack->gap_pairing_pin = pin; 4404 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4405 } 4406 4407 /** 4408 * @brief Abort Legacy Pairing 4409 * @param addr 4410 * @param pin 4411 * @return 0 if ok 4412 */ 4413 int gap_pin_code_negative(bd_addr_t addr){ 4414 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4415 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4416 } 4417 4418 /** 4419 * @brief SSP Passkey Response 4420 * @param addr 4421 * @param passkey 4422 * @return 0 if ok 4423 */ 4424 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4425 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4426 hci_stack->gap_pairing_passkey = passkey; 4427 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4428 } 4429 4430 /** 4431 * @brief Abort SSP Passkey Entry/Pairing 4432 * @param addr 4433 * @param pin 4434 * @return 0 if ok 4435 */ 4436 int gap_ssp_passkey_negative(bd_addr_t addr){ 4437 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4438 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4439 } 4440 4441 /** 4442 * @brief Accept SSP Numeric Comparison 4443 * @param addr 4444 * @param passkey 4445 * @return 0 if ok 4446 */ 4447 int gap_ssp_confirmation_response(bd_addr_t addr){ 4448 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4449 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4450 } 4451 4452 /** 4453 * @brief Abort SSP Numeric Comparison/Pairing 4454 * @param addr 4455 * @param pin 4456 * @return 0 if ok 4457 */ 4458 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4459 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4460 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4461 } 4462 4463 /** 4464 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4465 * @param inquiry_mode see bluetooth_defines.h 4466 */ 4467 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4468 hci_stack->inquiry_mode = mode; 4469 } 4470 4471 /** 4472 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4473 */ 4474 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4475 hci_stack->sco_voice_setting = voice_setting; 4476 } 4477 4478 /** 4479 * @brief Get SCO Voice Setting 4480 * @return current voice setting 4481 */ 4482 uint16_t hci_get_sco_voice_setting(void){ 4483 return hci_stack->sco_voice_setting; 4484 } 4485 4486 /** @brief Get SCO packet length for current SCO Voice setting 4487 * @note Using SCO packets of the exact length is required for USB transfer 4488 * @return Length of SCO packets in bytes (not audio frames) 4489 */ 4490 int hci_get_sco_packet_length(void){ 4491 // see Core Spec for H2 USB Transfer. 4492 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4493 return 27; 4494 } 4495 #endif 4496 4497 4498 HCI_STATE hci_get_state(void){ 4499 return hci_stack->state; 4500 } 4501 4502 4503 /** 4504 * @brief Set callback for Bluetooth Hardware Error 4505 */ 4506 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4507 hci_stack->hardware_error_callback = fn; 4508 } 4509 4510 void hci_disconnect_all(void){ 4511 btstack_linked_list_iterator_t it; 4512 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4513 while (btstack_linked_list_iterator_has_next(&it)){ 4514 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4515 if (con->state == SENT_DISCONNECT) continue; 4516 con->state = SEND_DISCONNECT; 4517 } 4518 hci_run(); 4519 } 4520 4521 uint16_t hci_get_manufacturer(void){ 4522 return hci_stack->manufacturer; 4523 } 4524