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 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1179 1180 // - baud rate to reset, restore UART baud rate if needed 1181 int need_baud_change = hci_stack->config 1182 && hci_stack->chipset 1183 && hci_stack->chipset->set_baudrate_command 1184 && hci_stack->hci_transport->set_baudrate 1185 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1186 if (need_baud_change) { 1187 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1188 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1189 hci_stack->hci_transport->set_baudrate(baud_rate); 1190 } 1191 1192 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1193 // -> Work around: wait a few milliseconds here. 1194 log_info("BCM delay after init script"); 1195 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1196 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1197 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1198 btstack_run_loop_add_timer(&hci_stack->timeout); 1199 break; 1200 } 1201 } 1202 // otherwise continue 1203 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1204 hci_send_cmd(&hci_read_local_supported_commands); 1205 break; 1206 case HCI_INIT_SET_BD_ADDR: 1207 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1208 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1209 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1210 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1211 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1212 break; 1213 #endif 1214 1215 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1216 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1217 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1218 hci_send_cmd(&hci_read_local_supported_commands); 1219 break; 1220 case HCI_INIT_READ_BD_ADDR: 1221 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1222 hci_send_cmd(&hci_read_bd_addr); 1223 break; 1224 case HCI_INIT_READ_BUFFER_SIZE: 1225 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1226 hci_send_cmd(&hci_read_buffer_size); 1227 break; 1228 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1229 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1230 hci_send_cmd(&hci_read_local_supported_features); 1231 break; 1232 1233 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1234 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1235 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1236 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1237 break; 1238 case HCI_INIT_HOST_BUFFER_SIZE: 1239 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1240 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1241 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1242 break; 1243 #endif 1244 1245 case HCI_INIT_SET_EVENT_MASK: 1246 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1247 if (hci_le_supported()){ 1248 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1249 } else { 1250 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1251 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1252 } 1253 break; 1254 1255 #ifdef ENABLE_CLASSIC 1256 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1257 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1258 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1259 break; 1260 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1261 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1262 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1263 break; 1264 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1265 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1266 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1267 break; 1268 case HCI_INIT_WRITE_LOCAL_NAME: { 1269 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1270 hci_reserve_packet_buffer(); 1271 uint8_t * packet = hci_stack->hci_packet_buffer; 1272 // construct HCI Command and send 1273 uint16_t opcode = hci_write_local_name.opcode; 1274 hci_stack->last_cmd_opcode = opcode; 1275 packet[0] = opcode & 0xff; 1276 packet[1] = opcode >> 8; 1277 packet[2] = DEVICE_NAME_LEN; 1278 memset(&packet[3], 0, DEVICE_NAME_LEN); 1279 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1280 // expand '00:00:00:00:00:00' in name with bd_addr 1281 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1282 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1283 break; 1284 } 1285 case HCI_INIT_WRITE_EIR_DATA: { 1286 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1287 hci_reserve_packet_buffer(); 1288 uint8_t * packet = hci_stack->hci_packet_buffer; 1289 // construct HCI Command and send 1290 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1291 hci_stack->last_cmd_opcode = opcode; 1292 packet[0] = opcode & 0xff; 1293 packet[1] = opcode >> 8; 1294 packet[2] = 1 + 240; 1295 packet[3] = 0; // FEC not required 1296 if (hci_stack->eir_data){ 1297 memcpy(&packet[4], hci_stack->eir_data, 240); 1298 } else { 1299 memset(&packet[4], 0, 240); 1300 int name_len = strlen(hci_stack->local_name); 1301 packet[4] = name_len + 1; 1302 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1303 memcpy(&packet[6], hci_stack->local_name, name_len); 1304 } 1305 // expand '00:00:00:00:00:00' in name with bd_addr 1306 hci_replace_bd_addr_placeholder(&packet[4], 240); 1307 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1308 break; 1309 } 1310 case HCI_INIT_WRITE_INQUIRY_MODE: 1311 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1312 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1313 break; 1314 case HCI_INIT_WRITE_SCAN_ENABLE: 1315 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1316 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1317 break; 1318 // only sent if ENABLE_SCO_OVER_HCI is defined 1319 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1320 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1321 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1322 break; 1323 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1324 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1325 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1326 break; 1327 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1328 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1329 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1330 log_info("BCM: Route SCO data via HCI transport"); 1331 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1332 break; 1333 1334 #endif 1335 #ifdef ENABLE_BLE 1336 // LE INIT 1337 case HCI_INIT_LE_READ_BUFFER_SIZE: 1338 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1339 hci_send_cmd(&hci_le_read_buffer_size); 1340 break; 1341 case HCI_INIT_LE_SET_EVENT_MASK: 1342 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1343 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1344 break; 1345 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1346 // LE Supported Host = 1, Simultaneous Host = 0 1347 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1348 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1349 break; 1350 #endif 1351 1352 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1353 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1354 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1355 hci_send_cmd(&hci_le_read_maximum_data_length); 1356 break; 1357 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1358 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1359 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1360 break; 1361 #endif 1362 1363 #ifdef ENABLE_LE_CENTRAL 1364 case HCI_INIT_READ_WHITE_LIST_SIZE: 1365 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1366 hci_send_cmd(&hci_le_read_white_list_size); 1367 break; 1368 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1369 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1370 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1371 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1372 break; 1373 #endif 1374 default: 1375 return; 1376 } 1377 } 1378 1379 static void hci_init_done(void){ 1380 // done. tell the app 1381 log_info("hci_init_done -> HCI_STATE_WORKING"); 1382 hci_stack->state = HCI_STATE_WORKING; 1383 hci_emit_state(); 1384 hci_run(); 1385 } 1386 1387 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1388 1389 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1390 1391 uint8_t command_completed = 0; 1392 1393 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1394 uint16_t opcode = little_endian_read_16(packet,3); 1395 if (opcode == hci_stack->last_cmd_opcode){ 1396 command_completed = 1; 1397 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1398 } else { 1399 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1400 } 1401 } 1402 1403 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1404 uint8_t status = packet[2]; 1405 uint16_t opcode = little_endian_read_16(packet,4); 1406 if (opcode == hci_stack->last_cmd_opcode){ 1407 if (status){ 1408 command_completed = 1; 1409 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1410 } else { 1411 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1412 } 1413 } else { 1414 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1415 } 1416 } 1417 1418 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1419 1420 // Vendor == CSR 1421 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1422 // TODO: track actual command 1423 command_completed = 1; 1424 } 1425 1426 // Vendor == Toshiba 1427 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1428 // TODO: track actual command 1429 command_completed = 1; 1430 } 1431 1432 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1433 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1434 // 1435 // HCI Reset 1436 // Timeout 100 ms 1437 // HCI Reset 1438 // Command Complete Reset 1439 // HCI Read Local Version Information 1440 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1441 // hang... 1442 // 1443 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1444 if (!command_completed 1445 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1446 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1447 1448 uint16_t opcode = little_endian_read_16(packet,3); 1449 if (opcode == hci_reset.opcode){ 1450 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1451 return; 1452 } 1453 } 1454 1455 // CSR & H5 1456 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1457 if (!command_completed 1458 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1459 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1460 1461 uint16_t opcode = little_endian_read_16(packet,3); 1462 if (opcode == hci_reset.opcode){ 1463 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1464 return; 1465 } 1466 } 1467 1468 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1469 // fix: Correct substate and behave as command below 1470 if (command_completed){ 1471 switch (hci_stack->substate){ 1472 case HCI_INIT_SEND_RESET: 1473 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1474 break; 1475 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1476 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1477 break; 1478 default: 1479 break; 1480 } 1481 } 1482 1483 #endif 1484 1485 if (!command_completed) return; 1486 1487 int need_baud_change = 0; 1488 int need_addr_change = 0; 1489 1490 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1491 need_baud_change = hci_stack->config 1492 && hci_stack->chipset 1493 && hci_stack->chipset->set_baudrate_command 1494 && hci_stack->hci_transport->set_baudrate 1495 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1496 1497 need_addr_change = hci_stack->custom_bd_addr_set 1498 && hci_stack->chipset 1499 && hci_stack->chipset->set_bd_addr_command; 1500 #endif 1501 1502 switch(hci_stack->substate){ 1503 1504 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1505 case HCI_INIT_SEND_RESET: 1506 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1507 // fix: just correct substate and behave as command below 1508 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1509 btstack_run_loop_remove_timer(&hci_stack->timeout); 1510 break; 1511 case HCI_INIT_W4_SEND_RESET: 1512 btstack_run_loop_remove_timer(&hci_stack->timeout); 1513 break; 1514 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1515 log_info("Received local name, need baud change %d", need_baud_change); 1516 if (need_baud_change){ 1517 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1518 return; 1519 } 1520 // skip baud change 1521 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1522 return; 1523 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1524 // for STLC2500D, baud rate change already happened. 1525 // for others, baud rate gets changed now 1526 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1527 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1528 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1529 hci_stack->hci_transport->set_baudrate(baud_rate); 1530 } 1531 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1532 return; 1533 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1534 btstack_run_loop_remove_timer(&hci_stack->timeout); 1535 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1536 return; 1537 case HCI_INIT_W4_CUSTOM_INIT: 1538 // repeat custom init 1539 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1540 return; 1541 #else 1542 case HCI_INIT_W4_SEND_RESET: 1543 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1544 return ; 1545 #endif 1546 1547 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1548 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1549 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1550 return; 1551 } 1552 if (need_addr_change){ 1553 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1554 return; 1555 } 1556 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1557 return; 1558 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1559 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1560 if (need_baud_change){ 1561 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1562 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1563 hci_stack->hci_transport->set_baudrate(baud_rate); 1564 } 1565 if (need_addr_change){ 1566 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1567 return; 1568 } 1569 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1570 return; 1571 case HCI_INIT_W4_SET_BD_ADDR: 1572 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1573 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1574 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1575 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1576 return; 1577 } 1578 // skipping st warm boot 1579 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1580 return; 1581 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1582 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1583 return; 1584 #endif 1585 case HCI_INIT_W4_READ_BD_ADDR: 1586 // only read buffer size if supported 1587 if (hci_stack->local_supported_commands[0] & 0x01) { 1588 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1589 return; 1590 } 1591 // skipping read buffer size 1592 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1593 return; 1594 case HCI_INIT_W4_SET_EVENT_MASK: 1595 // skip Classic init commands for LE only chipsets 1596 if (!hci_classic_supported()){ 1597 #ifdef ENABLE_BLE 1598 if (hci_le_supported()){ 1599 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1600 return; 1601 } 1602 #endif 1603 log_error("Neither BR/EDR nor LE supported"); 1604 hci_init_done(); 1605 return; 1606 } 1607 if (!gap_ssp_supported()){ 1608 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1609 return; 1610 } 1611 break; 1612 #ifdef ENABLE_BLE 1613 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1614 // skip write le host if not supported (e.g. on LE only EM9301) 1615 if (hci_stack->local_supported_commands[0] & 0x02) break; 1616 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1617 return; 1618 1619 1620 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1621 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1622 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1623 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1624 return; 1625 } 1626 // explicit fall through to reduce repetitions 1627 #endif 1628 1629 #ifdef ENABLE_LE_CENTRAL 1630 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1631 #else 1632 hci_init_done(); 1633 #endif 1634 return; 1635 #endif 1636 1637 #ifdef ENABLE_SCO_OVER_HCI 1638 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1639 // skip write synchronous flow control if not supported 1640 if (hci_stack->local_supported_commands[0] & 0x04) break; 1641 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1642 // explicit fall through to reduce repetitions 1643 1644 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1645 // skip write default erroneous data reporting if not supported 1646 if (hci_stack->local_supported_commands[0] & 0x08) break; 1647 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1648 // explicit fall through to reduce repetitions 1649 1650 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1651 // skip bcm set sco pcm config on non-Broadcom chipsets 1652 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1653 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1654 // explicit fall through to reduce repetitions 1655 1656 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1657 if (!hci_le_supported()){ 1658 // SKIP LE init for Classic only configuration 1659 hci_init_done(); 1660 return; 1661 } 1662 break; 1663 1664 #else /* !ENABLE_SCO_OVER_HCI */ 1665 1666 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1667 #ifdef ENABLE_BLE 1668 if (hci_le_supported()){ 1669 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1670 return; 1671 } 1672 #endif 1673 // SKIP LE init for Classic only configuration 1674 hci_init_done(); 1675 return; 1676 #endif /* ENABLE_SCO_OVER_HCI */ 1677 1678 // Response to command before init done state -> init done 1679 case (HCI_INIT_DONE-1): 1680 hci_init_done(); 1681 return; 1682 1683 default: 1684 break; 1685 } 1686 hci_initializing_next_state(); 1687 } 1688 1689 static void event_handler(uint8_t *packet, int size){ 1690 1691 uint16_t event_length = packet[1]; 1692 1693 // assert packet is complete 1694 if (size != event_length + 2){ 1695 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1696 return; 1697 } 1698 1699 bd_addr_t addr; 1700 bd_addr_type_t addr_type; 1701 hci_con_handle_t handle; 1702 hci_connection_t * conn; 1703 int i; 1704 #ifdef ENABLE_CLASSIC 1705 uint8_t link_type; 1706 #endif 1707 1708 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1709 1710 switch (hci_event_packet_get_type(packet)) { 1711 1712 case HCI_EVENT_COMMAND_COMPLETE: 1713 // get num cmd packets - limit to 1 to reduce complexity 1714 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1715 1716 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1717 if (packet[5]) break; 1718 // terminate, name 248 chars 1719 packet[6+248] = 0; 1720 log_info("local name: %s", &packet[6]); 1721 } 1722 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1723 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1724 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1725 uint16_t acl_len = little_endian_read_16(packet, 6); 1726 uint16_t sco_len = packet[8]; 1727 1728 // determine usable ACL/SCO payload size 1729 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1730 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1731 1732 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1733 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1734 1735 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1736 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1737 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1738 } 1739 } 1740 #ifdef ENABLE_BLE 1741 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1742 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1743 hci_stack->le_acl_packets_total_num = packet[8]; 1744 // determine usable ACL payload size 1745 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1746 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1747 } 1748 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1749 } 1750 #endif 1751 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1752 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1753 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1754 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1755 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); 1756 } 1757 #endif 1758 #ifdef ENABLE_LE_CENTRAL 1759 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1760 hci_stack->le_whitelist_capacity = packet[6]; 1761 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1762 } 1763 #endif 1764 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1765 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1766 hci_stack->local_bd_addr); 1767 log_info("Local Address, Status: 0x%02x: Addr: %s", 1768 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1769 #ifdef ENABLE_CLASSIC 1770 if (hci_stack->link_key_db){ 1771 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1772 } 1773 #endif 1774 } 1775 #ifdef ENABLE_CLASSIC 1776 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1777 hci_emit_discoverable_enabled(hci_stack->discoverable); 1778 } 1779 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1780 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1781 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1782 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1783 hci_emit_event(event, sizeof(event), 1); 1784 } 1785 } 1786 #endif 1787 1788 // Note: HCI init checks 1789 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1790 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1791 1792 #ifdef ENABLE_CLASSIC 1793 // determine usable ACL packet types based on host buffer size and supported features 1794 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1795 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1796 #endif 1797 // Classic/LE 1798 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1799 } 1800 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1801 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1802 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1803 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1804 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1805 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1806 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1807 } 1808 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1809 hci_stack->local_supported_commands[0] = 1810 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1811 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1812 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1813 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1814 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1815 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1816 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1817 } 1818 #ifdef ENABLE_CLASSIC 1819 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1820 if (packet[5] == 0){ 1821 hci_stack->synchronous_flow_control_enabled = 1; 1822 } 1823 } 1824 #endif 1825 break; 1826 1827 case HCI_EVENT_COMMAND_STATUS: 1828 // get num cmd packets - limit to 1 to reduce complexity 1829 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1830 break; 1831 1832 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1833 int offset = 3; 1834 for (i=0; i<packet[2];i++){ 1835 handle = little_endian_read_16(packet, offset); 1836 offset += 2; 1837 uint16_t num_packets = little_endian_read_16(packet, offset); 1838 offset += 2; 1839 1840 conn = hci_connection_for_handle(handle); 1841 if (!conn){ 1842 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1843 continue; 1844 } 1845 1846 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1847 #ifdef ENABLE_CLASSIC 1848 if (conn->num_sco_packets_sent >= num_packets){ 1849 conn->num_sco_packets_sent -= num_packets; 1850 } else { 1851 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1852 conn->num_sco_packets_sent = 0; 1853 } 1854 hci_notify_if_sco_can_send_now(); 1855 #endif 1856 } else { 1857 if (conn->num_acl_packets_sent >= num_packets){ 1858 conn->num_acl_packets_sent -= num_packets; 1859 } else { 1860 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1861 conn->num_acl_packets_sent = 0; 1862 } 1863 } 1864 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1865 } 1866 break; 1867 } 1868 1869 #ifdef ENABLE_CLASSIC 1870 case HCI_EVENT_INQUIRY_COMPLETE: 1871 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1872 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1873 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1874 hci_emit_event(event, sizeof(event), 1); 1875 } 1876 break; 1877 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1878 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1879 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1880 } 1881 break; 1882 case HCI_EVENT_CONNECTION_REQUEST: 1883 reverse_bd_addr(&packet[2], addr); 1884 // TODO: eval COD 8-10 1885 link_type = packet[11]; 1886 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1887 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1888 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1889 if (!conn) { 1890 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1891 } 1892 if (!conn) { 1893 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1894 hci_stack->decline_reason = 0x0d; 1895 bd_addr_copy(hci_stack->decline_addr, addr); 1896 break; 1897 } 1898 conn->role = HCI_ROLE_SLAVE; 1899 conn->state = RECEIVED_CONNECTION_REQUEST; 1900 // store info about eSCO 1901 if (link_type == 0x02){ 1902 conn->remote_supported_feature_eSCO = 1; 1903 } 1904 hci_run(); 1905 break; 1906 1907 case HCI_EVENT_CONNECTION_COMPLETE: 1908 // Connection management 1909 reverse_bd_addr(&packet[5], addr); 1910 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1911 addr_type = BD_ADDR_TYPE_CLASSIC; 1912 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1913 if (conn) { 1914 if (!packet[2]){ 1915 conn->state = OPEN; 1916 conn->con_handle = little_endian_read_16(packet, 3); 1917 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1918 1919 // restart timer 1920 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1921 btstack_run_loop_add_timer(&conn->timeout); 1922 1923 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1924 1925 hci_emit_nr_connections_changed(); 1926 } else { 1927 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1928 uint8_t status = packet[2]; 1929 bd_addr_t bd_address; 1930 memcpy(&bd_address, conn->address, 6); 1931 1932 // connection failed, remove entry 1933 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1934 btstack_memory_hci_connection_free( conn ); 1935 1936 // notify client if dedicated bonding 1937 if (notify_dedicated_bonding_failed){ 1938 log_info("hci notify_dedicated_bonding_failed"); 1939 hci_emit_dedicated_bonding_result(bd_address, status); 1940 } 1941 1942 // if authentication error, also delete link key 1943 if (packet[2] == 0x05) { 1944 gap_drop_link_key_for_bd_addr(addr); 1945 } 1946 } 1947 } 1948 break; 1949 1950 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1951 reverse_bd_addr(&packet[5], addr); 1952 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1953 if (packet[2]){ 1954 // connection failed 1955 break; 1956 } 1957 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1958 if (!conn) { 1959 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1960 } 1961 if (!conn) { 1962 break; 1963 } 1964 conn->state = OPEN; 1965 conn->con_handle = little_endian_read_16(packet, 3); 1966 1967 #ifdef ENABLE_SCO_OVER_HCI 1968 // update SCO 1969 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1970 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1971 } 1972 #endif 1973 break; 1974 1975 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1976 handle = little_endian_read_16(packet, 3); 1977 conn = hci_connection_for_handle(handle); 1978 if (!conn) break; 1979 if (!packet[2]){ 1980 uint8_t * features = &packet[5]; 1981 if (features[6] & (1 << 3)){ 1982 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1983 } 1984 if (features[3] & (1<<7)){ 1985 conn->remote_supported_feature_eSCO = 1; 1986 } 1987 } 1988 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1989 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1990 if (conn->bonding_flags & BONDING_DEDICATED){ 1991 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1992 } 1993 break; 1994 1995 case HCI_EVENT_LINK_KEY_REQUEST: 1996 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1997 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1998 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1999 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2000 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2001 hci_run(); 2002 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2003 return; 2004 2005 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2006 reverse_bd_addr(&packet[2], addr); 2007 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2008 if (!conn) break; 2009 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2010 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2011 // Change Connection Encryption keeps link key type 2012 if (link_key_type != CHANGED_COMBINATION_KEY){ 2013 conn->link_key_type = link_key_type; 2014 } 2015 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2016 // still forward event to allow dismiss of pairing dialog 2017 break; 2018 } 2019 2020 case HCI_EVENT_PIN_CODE_REQUEST: 2021 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2022 // non-bondable mode: pin code negative reply will be sent 2023 if (!hci_stack->bondable){ 2024 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2025 hci_run(); 2026 return; 2027 } 2028 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2029 if (!hci_stack->link_key_db) break; 2030 hci_event_pin_code_request_get_bd_addr(packet, addr); 2031 hci_stack->link_key_db->delete_link_key(addr); 2032 break; 2033 2034 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2035 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2036 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2037 break; 2038 2039 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2040 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2041 if (!hci_stack->ssp_auto_accept) break; 2042 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2043 break; 2044 2045 case HCI_EVENT_USER_PASSKEY_REQUEST: 2046 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2047 if (!hci_stack->ssp_auto_accept) break; 2048 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2049 break; 2050 #endif 2051 2052 case HCI_EVENT_ENCRYPTION_CHANGE: 2053 handle = little_endian_read_16(packet, 3); 2054 conn = hci_connection_for_handle(handle); 2055 if (!conn) break; 2056 if (packet[2] == 0) { 2057 if (packet[5]){ 2058 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2059 } else { 2060 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2061 } 2062 } 2063 #ifdef ENABLE_CLASSIC 2064 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2065 #endif 2066 break; 2067 2068 #ifdef ENABLE_CLASSIC 2069 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2070 handle = little_endian_read_16(packet, 3); 2071 conn = hci_connection_for_handle(handle); 2072 if (!conn) break; 2073 2074 // dedicated bonding: send result and disconnect 2075 if (conn->bonding_flags & BONDING_DEDICATED){ 2076 conn->bonding_flags &= ~BONDING_DEDICATED; 2077 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2078 conn->bonding_status = packet[2]; 2079 break; 2080 } 2081 2082 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2083 // link key sufficient for requested security 2084 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2085 break; 2086 } 2087 // not enough 2088 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2089 break; 2090 #endif 2091 2092 // HCI_EVENT_DISCONNECTION_COMPLETE 2093 // has been split, to first notify stack before shutting connection down 2094 // see end of function, too. 2095 case HCI_EVENT_DISCONNECTION_COMPLETE: 2096 if (packet[2]) break; // status != 0 2097 handle = little_endian_read_16(packet, 3); 2098 // drop outgoing ACL fragments if it is for closed connection 2099 if (hci_stack->acl_fragmentation_total_size > 0) { 2100 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2101 log_info("hci: drop fragmented ACL data for closed connection"); 2102 hci_stack->acl_fragmentation_total_size = 0; 2103 hci_stack->acl_fragmentation_pos = 0; 2104 } 2105 } 2106 2107 // re-enable advertisements for le connections if active 2108 conn = hci_connection_for_handle(handle); 2109 if (!conn) break; 2110 #ifdef ENABLE_BLE 2111 #ifdef ENABLE_LE_PERIPHERAL 2112 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2113 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2114 } 2115 #endif 2116 #endif 2117 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2118 break; 2119 2120 case HCI_EVENT_HARDWARE_ERROR: 2121 log_error("Hardware Error: 0x%02x", packet[2]); 2122 if (hci_stack->hardware_error_callback){ 2123 (*hci_stack->hardware_error_callback)(packet[2]); 2124 } else { 2125 // if no special requests, just reboot stack 2126 hci_power_control_off(); 2127 hci_power_control_on(); 2128 } 2129 break; 2130 2131 #ifdef ENABLE_CLASSIC 2132 case HCI_EVENT_ROLE_CHANGE: 2133 if (packet[2]) break; // status != 0 2134 handle = little_endian_read_16(packet, 3); 2135 conn = hci_connection_for_handle(handle); 2136 if (!conn) break; // no conn 2137 conn->role = packet[9]; 2138 break; 2139 #endif 2140 2141 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2142 // release packet buffer only for asynchronous transport and if there are not further fragements 2143 if (hci_transport_synchronous()) { 2144 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2145 return; // instead of break: to avoid re-entering hci_run() 2146 } 2147 if (hci_stack->acl_fragmentation_total_size) break; 2148 hci_release_packet_buffer(); 2149 2150 // L2CAP receives this event via the hci_emit_event below 2151 2152 #ifdef ENABLE_CLASSIC 2153 // For SCO, we do the can_send_now_check here 2154 hci_notify_if_sco_can_send_now(); 2155 #endif 2156 break; 2157 2158 #ifdef ENABLE_CLASSIC 2159 case HCI_EVENT_SCO_CAN_SEND_NOW: 2160 // For SCO, we do the can_send_now_check here 2161 hci_notify_if_sco_can_send_now(); 2162 return; 2163 2164 // explode inquriy results for easier consumption 2165 case HCI_EVENT_INQUIRY_RESULT: 2166 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2167 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2168 gap_inquiry_explode(packet); 2169 break; 2170 #endif 2171 2172 #ifdef ENABLE_BLE 2173 case HCI_EVENT_LE_META: 2174 switch (packet[2]){ 2175 #ifdef ENABLE_LE_CENTRAL 2176 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2177 // log_info("advertising report received"); 2178 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2179 le_handle_advertisement_report(packet, size); 2180 break; 2181 #endif 2182 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2183 // Connection management 2184 reverse_bd_addr(&packet[8], addr); 2185 addr_type = (bd_addr_type_t)packet[7]; 2186 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2187 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2188 #ifdef ENABLE_LE_CENTRAL 2189 // if auto-connect, remove from whitelist in both roles 2190 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2191 hci_remove_from_whitelist(addr_type, addr); 2192 } 2193 // handle error: error is reported only to the initiator -> outgoing connection 2194 if (packet[3]){ 2195 // outgoing connection establishment is done 2196 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2197 // remove entry 2198 if (conn){ 2199 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2200 btstack_memory_hci_connection_free( conn ); 2201 } 2202 break; 2203 } 2204 #endif 2205 // on success, both hosts receive connection complete event 2206 if (packet[6] == HCI_ROLE_MASTER){ 2207 #ifdef ENABLE_LE_CENTRAL 2208 // if we're master, it was an outgoing connection and we're done with it 2209 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2210 #endif 2211 } else { 2212 #ifdef ENABLE_LE_PERIPHERAL 2213 // if we're slave, it was an incoming connection, advertisements have stopped 2214 hci_stack->le_advertisements_active = 0; 2215 // try to re-enable them 2216 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2217 #endif 2218 } 2219 // LE connections are auto-accepted, so just create a connection if there isn't one already 2220 if (!conn){ 2221 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2222 } 2223 // no memory, sorry. 2224 if (!conn){ 2225 break; 2226 } 2227 2228 conn->state = OPEN; 2229 conn->role = packet[6]; 2230 conn->con_handle = little_endian_read_16(packet, 4); 2231 2232 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2233 2234 // restart timer 2235 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2236 // btstack_run_loop_add_timer(&conn->timeout); 2237 2238 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2239 2240 hci_emit_nr_connections_changed(); 2241 break; 2242 2243 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2244 2245 default: 2246 break; 2247 } 2248 break; 2249 #endif 2250 default: 2251 break; 2252 } 2253 2254 // handle BT initialization 2255 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2256 hci_initializing_event_handler(packet, size); 2257 } 2258 2259 // help with BT sleep 2260 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2261 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2262 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2263 hci_initializing_next_state(); 2264 } 2265 2266 // notify upper stack 2267 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2268 2269 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2270 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2271 if (!packet[2]){ 2272 handle = little_endian_read_16(packet, 3); 2273 hci_connection_t * aConn = hci_connection_for_handle(handle); 2274 if (aConn) { 2275 uint8_t status = aConn->bonding_status; 2276 uint16_t flags = aConn->bonding_flags; 2277 bd_addr_t bd_address; 2278 memcpy(&bd_address, aConn->address, 6); 2279 hci_shutdown_connection(aConn); 2280 // connection struct is gone, don't access anymore 2281 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2282 hci_emit_dedicated_bonding_result(bd_address, status); 2283 } 2284 } 2285 } 2286 } 2287 2288 // execute main loop 2289 hci_run(); 2290 } 2291 2292 #ifdef ENABLE_CLASSIC 2293 static void sco_handler(uint8_t * packet, uint16_t size){ 2294 if (!hci_stack->sco_packet_handler) return; 2295 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2296 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2297 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2298 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2299 if (conn){ 2300 conn->num_packets_completed++; 2301 hci_stack->host_completed_packets = 1; 2302 hci_run(); 2303 } 2304 #endif 2305 } 2306 #endif 2307 2308 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2309 hci_dump_packet(packet_type, 1, packet, size); 2310 switch (packet_type) { 2311 case HCI_EVENT_PACKET: 2312 event_handler(packet, size); 2313 break; 2314 case HCI_ACL_DATA_PACKET: 2315 acl_handler(packet, size); 2316 break; 2317 #ifdef ENABLE_CLASSIC 2318 case HCI_SCO_DATA_PACKET: 2319 sco_handler(packet, size); 2320 break; 2321 #endif 2322 default: 2323 break; 2324 } 2325 } 2326 2327 /** 2328 * @brief Add event packet handler. 2329 */ 2330 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2331 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2332 } 2333 2334 2335 /** Register HCI packet handlers */ 2336 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2337 hci_stack->acl_packet_handler = handler; 2338 } 2339 2340 #ifdef ENABLE_CLASSIC 2341 /** 2342 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2343 */ 2344 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2345 hci_stack->sco_packet_handler = handler; 2346 } 2347 #endif 2348 2349 static void hci_state_reset(void){ 2350 // no connections yet 2351 hci_stack->connections = NULL; 2352 2353 // keep discoverable/connectable as this has been requested by the client(s) 2354 // hci_stack->discoverable = 0; 2355 // hci_stack->connectable = 0; 2356 // hci_stack->bondable = 1; 2357 // hci_stack->own_addr_type = 0; 2358 2359 // buffer is free 2360 hci_stack->hci_packet_buffer_reserved = 0; 2361 2362 // no pending cmds 2363 hci_stack->decline_reason = 0; 2364 hci_stack->new_scan_enable_value = 0xff; 2365 2366 // LE 2367 #ifdef ENABLE_BLE 2368 memset(hci_stack->le_random_address, 0, 6); 2369 hci_stack->le_random_address_set = 0; 2370 #endif 2371 #ifdef ENABLE_LE_CENTRAL 2372 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2373 hci_stack->le_scan_type = 0xff; 2374 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2375 hci_stack->le_whitelist = 0; 2376 hci_stack->le_whitelist_capacity = 0; 2377 #endif 2378 } 2379 2380 #ifdef ENABLE_CLASSIC 2381 /** 2382 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2383 */ 2384 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2385 // store and open remote device db 2386 hci_stack->link_key_db = link_key_db; 2387 if (hci_stack->link_key_db) { 2388 hci_stack->link_key_db->open(); 2389 } 2390 } 2391 #endif 2392 2393 void hci_init(const hci_transport_t *transport, const void *config){ 2394 2395 #ifdef HAVE_MALLOC 2396 if (!hci_stack) { 2397 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2398 } 2399 #else 2400 hci_stack = &hci_stack_static; 2401 #endif 2402 memset(hci_stack, 0, sizeof(hci_stack_t)); 2403 2404 // reference to use transport layer implementation 2405 hci_stack->hci_transport = transport; 2406 2407 // reference to used config 2408 hci_stack->config = config; 2409 2410 // setup pointer for outgoing packet buffer 2411 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2412 2413 // max acl payload size defined in config.h 2414 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2415 2416 // register packet handlers with transport 2417 transport->register_packet_handler(&packet_handler); 2418 2419 hci_stack->state = HCI_STATE_OFF; 2420 2421 // class of device 2422 hci_stack->class_of_device = 0x007a020c; // Smartphone 2423 2424 // bondable by default 2425 hci_stack->bondable = 1; 2426 2427 #ifdef ENABLE_CLASSIC 2428 // classic name 2429 hci_stack->local_name = default_classic_name; 2430 #endif 2431 2432 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2433 hci_stack->ssp_enable = 1; 2434 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2435 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2436 hci_stack->ssp_auto_accept = 1; 2437 2438 // voice setting - signed 16 bit pcm data with CVSD over the air 2439 hci_stack->sco_voice_setting = 0x60; 2440 2441 #ifdef ENABLE_LE_CENTRAL 2442 // connection parameter to use for outgoing connections 2443 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2444 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2445 hci_stack->le_connection_latency = 4; // 4 2446 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2447 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2448 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2449 #endif 2450 2451 // connection parameter range used to answer connection parameter update requests in l2cap 2452 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2453 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2454 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2455 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2456 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2457 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2458 2459 hci_state_reset(); 2460 } 2461 2462 /** 2463 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2464 */ 2465 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2466 hci_stack->chipset = chipset_driver; 2467 2468 // reset chipset driver - init is also called on power_up 2469 if (hci_stack->chipset && hci_stack->chipset->init){ 2470 hci_stack->chipset->init(hci_stack->config); 2471 } 2472 } 2473 2474 /** 2475 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2476 */ 2477 void hci_set_control(const btstack_control_t *hardware_control){ 2478 // references to used control implementation 2479 hci_stack->control = hardware_control; 2480 // init with transport config 2481 hardware_control->init(hci_stack->config); 2482 } 2483 2484 void hci_close(void){ 2485 // close remote device db 2486 if (hci_stack->link_key_db) { 2487 hci_stack->link_key_db->close(); 2488 } 2489 2490 btstack_linked_list_iterator_t lit; 2491 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2492 while (btstack_linked_list_iterator_has_next(&lit)){ 2493 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2494 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2495 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2496 hci_shutdown_connection(connection); 2497 } 2498 2499 hci_power_control(HCI_POWER_OFF); 2500 2501 #ifdef HAVE_MALLOC 2502 free(hci_stack); 2503 #endif 2504 hci_stack = NULL; 2505 } 2506 2507 #ifdef ENABLE_CLASSIC 2508 void gap_set_class_of_device(uint32_t class_of_device){ 2509 hci_stack->class_of_device = class_of_device; 2510 } 2511 2512 void hci_disable_l2cap_timeout_check(void){ 2513 disable_l2cap_timeouts = 1; 2514 } 2515 #endif 2516 2517 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2518 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2519 void hci_set_bd_addr(bd_addr_t addr){ 2520 memcpy(hci_stack->custom_bd_addr, addr, 6); 2521 hci_stack->custom_bd_addr_set = 1; 2522 } 2523 #endif 2524 2525 // State-Module-Driver overview 2526 // state module low-level 2527 // HCI_STATE_OFF off close 2528 // HCI_STATE_INITIALIZING, on open 2529 // HCI_STATE_WORKING, on open 2530 // HCI_STATE_HALTING, on open 2531 // HCI_STATE_SLEEPING, off/sleep close 2532 // HCI_STATE_FALLING_ASLEEP on open 2533 2534 static int hci_power_control_on(void){ 2535 2536 // power on 2537 int err = 0; 2538 if (hci_stack->control && hci_stack->control->on){ 2539 err = (*hci_stack->control->on)(); 2540 } 2541 if (err){ 2542 log_error( "POWER_ON failed"); 2543 hci_emit_hci_open_failed(); 2544 return err; 2545 } 2546 2547 // int chipset driver 2548 if (hci_stack->chipset && hci_stack->chipset->init){ 2549 hci_stack->chipset->init(hci_stack->config); 2550 } 2551 2552 // init transport 2553 if (hci_stack->hci_transport->init){ 2554 hci_stack->hci_transport->init(hci_stack->config); 2555 } 2556 2557 // open transport 2558 err = hci_stack->hci_transport->open(); 2559 if (err){ 2560 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2561 if (hci_stack->control && hci_stack->control->off){ 2562 (*hci_stack->control->off)(); 2563 } 2564 hci_emit_hci_open_failed(); 2565 return err; 2566 } 2567 return 0; 2568 } 2569 2570 static void hci_power_control_off(void){ 2571 2572 log_info("hci_power_control_off"); 2573 2574 // close low-level device 2575 hci_stack->hci_transport->close(); 2576 2577 log_info("hci_power_control_off - hci_transport closed"); 2578 2579 // power off 2580 if (hci_stack->control && hci_stack->control->off){ 2581 (*hci_stack->control->off)(); 2582 } 2583 2584 log_info("hci_power_control_off - control closed"); 2585 2586 hci_stack->state = HCI_STATE_OFF; 2587 } 2588 2589 static void hci_power_control_sleep(void){ 2590 2591 log_info("hci_power_control_sleep"); 2592 2593 #if 0 2594 // don't close serial port during sleep 2595 2596 // close low-level device 2597 hci_stack->hci_transport->close(hci_stack->config); 2598 #endif 2599 2600 // sleep mode 2601 if (hci_stack->control && hci_stack->control->sleep){ 2602 (*hci_stack->control->sleep)(); 2603 } 2604 2605 hci_stack->state = HCI_STATE_SLEEPING; 2606 } 2607 2608 static int hci_power_control_wake(void){ 2609 2610 log_info("hci_power_control_wake"); 2611 2612 // wake on 2613 if (hci_stack->control && hci_stack->control->wake){ 2614 (*hci_stack->control->wake)(); 2615 } 2616 2617 #if 0 2618 // open low-level device 2619 int err = hci_stack->hci_transport->open(hci_stack->config); 2620 if (err){ 2621 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2622 if (hci_stack->control && hci_stack->control->off){ 2623 (*hci_stack->control->off)(); 2624 } 2625 hci_emit_hci_open_failed(); 2626 return err; 2627 } 2628 #endif 2629 2630 return 0; 2631 } 2632 2633 static void hci_power_transition_to_initializing(void){ 2634 // set up state machine 2635 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2636 hci_stack->hci_packet_buffer_reserved = 0; 2637 hci_stack->state = HCI_STATE_INITIALIZING; 2638 hci_stack->substate = HCI_INIT_SEND_RESET; 2639 } 2640 2641 int hci_power_control(HCI_POWER_MODE power_mode){ 2642 2643 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2644 2645 int err = 0; 2646 switch (hci_stack->state){ 2647 2648 case HCI_STATE_OFF: 2649 switch (power_mode){ 2650 case HCI_POWER_ON: 2651 err = hci_power_control_on(); 2652 if (err) { 2653 log_error("hci_power_control_on() error %d", err); 2654 return err; 2655 } 2656 hci_power_transition_to_initializing(); 2657 break; 2658 case HCI_POWER_OFF: 2659 // do nothing 2660 break; 2661 case HCI_POWER_SLEEP: 2662 // do nothing (with SLEEP == OFF) 2663 break; 2664 } 2665 break; 2666 2667 case HCI_STATE_INITIALIZING: 2668 switch (power_mode){ 2669 case HCI_POWER_ON: 2670 // do nothing 2671 break; 2672 case HCI_POWER_OFF: 2673 // no connections yet, just turn it off 2674 hci_power_control_off(); 2675 break; 2676 case HCI_POWER_SLEEP: 2677 // no connections yet, just turn it off 2678 hci_power_control_sleep(); 2679 break; 2680 } 2681 break; 2682 2683 case HCI_STATE_WORKING: 2684 switch (power_mode){ 2685 case HCI_POWER_ON: 2686 // do nothing 2687 break; 2688 case HCI_POWER_OFF: 2689 // see hci_run 2690 hci_stack->state = HCI_STATE_HALTING; 2691 break; 2692 case HCI_POWER_SLEEP: 2693 // see hci_run 2694 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2695 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2696 break; 2697 } 2698 break; 2699 2700 case HCI_STATE_HALTING: 2701 switch (power_mode){ 2702 case HCI_POWER_ON: 2703 hci_power_transition_to_initializing(); 2704 break; 2705 case HCI_POWER_OFF: 2706 // do nothing 2707 break; 2708 case HCI_POWER_SLEEP: 2709 // see hci_run 2710 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2711 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2712 break; 2713 } 2714 break; 2715 2716 case HCI_STATE_FALLING_ASLEEP: 2717 switch (power_mode){ 2718 case HCI_POWER_ON: 2719 2720 #ifdef HAVE_PLATFORM_IPHONE_OS 2721 // nothing to do, if H4 supports power management 2722 if (btstack_control_iphone_power_management_enabled()){ 2723 hci_stack->state = HCI_STATE_INITIALIZING; 2724 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2725 break; 2726 } 2727 #endif 2728 hci_power_transition_to_initializing(); 2729 break; 2730 case HCI_POWER_OFF: 2731 // see hci_run 2732 hci_stack->state = HCI_STATE_HALTING; 2733 break; 2734 case HCI_POWER_SLEEP: 2735 // do nothing 2736 break; 2737 } 2738 break; 2739 2740 case HCI_STATE_SLEEPING: 2741 switch (power_mode){ 2742 case HCI_POWER_ON: 2743 2744 #ifdef HAVE_PLATFORM_IPHONE_OS 2745 // nothing to do, if H4 supports power management 2746 if (btstack_control_iphone_power_management_enabled()){ 2747 hci_stack->state = HCI_STATE_INITIALIZING; 2748 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2749 hci_update_scan_enable(); 2750 break; 2751 } 2752 #endif 2753 err = hci_power_control_wake(); 2754 if (err) return err; 2755 hci_power_transition_to_initializing(); 2756 break; 2757 case HCI_POWER_OFF: 2758 hci_stack->state = HCI_STATE_HALTING; 2759 break; 2760 case HCI_POWER_SLEEP: 2761 // do nothing 2762 break; 2763 } 2764 break; 2765 } 2766 2767 // create internal event 2768 hci_emit_state(); 2769 2770 // trigger next/first action 2771 hci_run(); 2772 2773 return 0; 2774 } 2775 2776 2777 #ifdef ENABLE_CLASSIC 2778 2779 static void hci_update_scan_enable(void){ 2780 // 2 = page scan, 1 = inq scan 2781 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2782 hci_run(); 2783 } 2784 2785 void gap_discoverable_control(uint8_t enable){ 2786 if (enable) enable = 1; // normalize argument 2787 2788 if (hci_stack->discoverable == enable){ 2789 hci_emit_discoverable_enabled(hci_stack->discoverable); 2790 return; 2791 } 2792 2793 hci_stack->discoverable = enable; 2794 hci_update_scan_enable(); 2795 } 2796 2797 void gap_connectable_control(uint8_t enable){ 2798 if (enable) enable = 1; // normalize argument 2799 2800 // don't emit event 2801 if (hci_stack->connectable == enable) return; 2802 2803 hci_stack->connectable = enable; 2804 hci_update_scan_enable(); 2805 } 2806 #endif 2807 2808 void gap_local_bd_addr(bd_addr_t address_buffer){ 2809 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2810 } 2811 2812 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2813 static void hci_host_num_completed_packets(void){ 2814 2815 // create packet manually as arrays are not supported and num_commands should not get reduced 2816 hci_reserve_packet_buffer(); 2817 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2818 2819 uint16_t size = 0; 2820 uint16_t num_handles = 0; 2821 packet[size++] = 0x35; 2822 packet[size++] = 0x0c; 2823 size++; // skip param len 2824 size++; // skip num handles 2825 2826 // add { handle, packets } entries 2827 btstack_linked_item_t * it; 2828 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2829 hci_connection_t * connection = (hci_connection_t *) it; 2830 if (connection->num_packets_completed){ 2831 little_endian_store_16(packet, size, connection->con_handle); 2832 size += 2; 2833 little_endian_store_16(packet, size, connection->num_packets_completed); 2834 size += 2; 2835 // 2836 num_handles++; 2837 connection->num_packets_completed = 0; 2838 } 2839 } 2840 2841 packet[2] = size - 3; 2842 packet[3] = num_handles; 2843 2844 hci_stack->host_completed_packets = 0; 2845 2846 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2847 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2848 2849 // release packet buffer for synchronous transport implementations 2850 if (hci_transport_synchronous()){ 2851 hci_stack->hci_packet_buffer_reserved = 0; 2852 } 2853 } 2854 #endif 2855 2856 static void hci_run(void){ 2857 2858 // log_info("hci_run: entered"); 2859 btstack_linked_item_t * it; 2860 2861 // send continuation fragments first, as they block the prepared packet buffer 2862 if (hci_stack->acl_fragmentation_total_size > 0) { 2863 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2864 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2865 if (connection) { 2866 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2867 hci_send_acl_packet_fragments(connection); 2868 return; 2869 } 2870 } else { 2871 // connection gone -> discard further fragments 2872 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2873 hci_stack->acl_fragmentation_total_size = 0; 2874 hci_stack->acl_fragmentation_pos = 0; 2875 } 2876 } 2877 2878 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2879 // send host num completed packets next as they don't require num_cmd_packets > 0 2880 if (!hci_can_send_comand_packet_transport()) return; 2881 if (hci_stack->host_completed_packets){ 2882 hci_host_num_completed_packets(); 2883 return; 2884 } 2885 #endif 2886 2887 if (!hci_can_send_command_packet_now()) return; 2888 2889 // global/non-connection oriented commands 2890 2891 #ifdef ENABLE_CLASSIC 2892 // decline incoming connections 2893 if (hci_stack->decline_reason){ 2894 uint8_t reason = hci_stack->decline_reason; 2895 hci_stack->decline_reason = 0; 2896 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2897 return; 2898 } 2899 // send scan enable 2900 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2901 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2902 hci_stack->new_scan_enable_value = 0xff; 2903 return; 2904 } 2905 // start/stop inquiry 2906 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2907 uint8_t duration = hci_stack->inquiry_state; 2908 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2909 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2910 return; 2911 } 2912 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2913 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2914 hci_send_cmd(&hci_inquiry_cancel); 2915 return; 2916 } 2917 // remote name request 2918 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2919 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2920 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2921 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2922 return; 2923 } 2924 // pairing 2925 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2926 uint8_t state = hci_stack->gap_pairing_state; 2927 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2928 switch (state){ 2929 case GAP_PAIRING_STATE_SEND_PIN: 2930 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2931 break; 2932 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2933 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2934 break; 2935 case GAP_PAIRING_STATE_SEND_PASSKEY: 2936 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2937 break; 2938 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2939 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2940 break; 2941 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2942 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2943 break; 2944 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2945 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2946 break; 2947 default: 2948 break; 2949 } 2950 return; 2951 } 2952 #endif 2953 2954 #ifdef ENABLE_BLE 2955 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2956 if ((hci_stack->state == HCI_STATE_WORKING) 2957 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2958 2959 #ifdef ENABLE_LE_CENTRAL 2960 // handle le scan 2961 switch(hci_stack->le_scanning_state){ 2962 case LE_START_SCAN: 2963 hci_stack->le_scanning_state = LE_SCANNING; 2964 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2965 return; 2966 2967 case LE_STOP_SCAN: 2968 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2969 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2970 return; 2971 default: 2972 break; 2973 } 2974 if (hci_stack->le_scan_type != 0xff){ 2975 // defaults: active scanning, accept all advertisement packets 2976 int scan_type = hci_stack->le_scan_type; 2977 hci_stack->le_scan_type = 0xff; 2978 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); 2979 return; 2980 } 2981 #endif 2982 #ifdef ENABLE_LE_PERIPHERAL 2983 // le advertisement control 2984 if (hci_stack->le_advertisements_todo){ 2985 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2986 } 2987 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2988 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2989 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2990 return; 2991 } 2992 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2993 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2994 hci_send_cmd(&hci_le_set_advertising_parameters, 2995 hci_stack->le_advertisements_interval_min, 2996 hci_stack->le_advertisements_interval_max, 2997 hci_stack->le_advertisements_type, 2998 hci_stack->le_own_addr_type, 2999 hci_stack->le_advertisements_direct_address_type, 3000 hci_stack->le_advertisements_direct_address, 3001 hci_stack->le_advertisements_channel_map, 3002 hci_stack->le_advertisements_filter_policy); 3003 return; 3004 } 3005 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3006 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3007 uint8_t adv_data_clean[31]; 3008 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3009 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3010 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3011 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3012 return; 3013 } 3014 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3015 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3016 uint8_t scan_data_clean[31]; 3017 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3018 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3019 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3020 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3021 return; 3022 } 3023 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3024 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3025 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3026 return; 3027 } 3028 #endif 3029 3030 #ifdef ENABLE_LE_CENTRAL 3031 // 3032 // LE Whitelist Management 3033 // 3034 3035 // check if whitelist needs modification 3036 btstack_linked_list_iterator_t lit; 3037 int modification_pending = 0; 3038 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3039 while (btstack_linked_list_iterator_has_next(&lit)){ 3040 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3041 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3042 modification_pending = 1; 3043 break; 3044 } 3045 } 3046 3047 if (modification_pending){ 3048 // stop connnecting if modification pending 3049 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3050 hci_send_cmd(&hci_le_create_connection_cancel); 3051 return; 3052 } 3053 3054 // add/remove entries 3055 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3056 while (btstack_linked_list_iterator_has_next(&lit)){ 3057 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3058 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3059 entry->state = LE_WHITELIST_ON_CONTROLLER; 3060 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3061 return; 3062 3063 } 3064 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3065 bd_addr_t address; 3066 bd_addr_type_t address_type = entry->address_type; 3067 memcpy(address, entry->address, 6); 3068 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3069 btstack_memory_whitelist_entry_free(entry); 3070 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3071 return; 3072 } 3073 } 3074 } 3075 3076 // start connecting 3077 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3078 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3079 bd_addr_t null_addr; 3080 memset(null_addr, 0, 6); 3081 hci_send_cmd(&hci_le_create_connection, 3082 0x0060, // scan interval: 60 ms 3083 0x0030, // scan interval: 30 ms 3084 1, // use whitelist 3085 0, // peer address type 3086 null_addr, // peer bd addr 3087 hci_stack->le_own_addr_type, // our addr type: 3088 hci_stack->le_connection_interval_min, // conn interval min 3089 hci_stack->le_connection_interval_max, // conn interval max 3090 hci_stack->le_connection_latency, // conn latency 3091 hci_stack->le_supervision_timeout, // conn latency 3092 hci_stack->le_minimum_ce_length, // min ce length 3093 hci_stack->le_maximum_ce_length // max ce length 3094 ); 3095 return; 3096 } 3097 #endif 3098 } 3099 #endif 3100 3101 // send pending HCI commands 3102 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3103 hci_connection_t * connection = (hci_connection_t *) it; 3104 3105 switch(connection->state){ 3106 case SEND_CREATE_CONNECTION: 3107 switch(connection->address_type){ 3108 #ifdef ENABLE_CLASSIC 3109 case BD_ADDR_TYPE_CLASSIC: 3110 log_info("sending hci_create_connection"); 3111 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3112 break; 3113 #endif 3114 default: 3115 #ifdef ENABLE_BLE 3116 #ifdef ENABLE_LE_CENTRAL 3117 log_info("sending hci_le_create_connection"); 3118 hci_send_cmd(&hci_le_create_connection, 3119 0x0060, // scan interval: 60 ms 3120 0x0030, // scan interval: 30 ms 3121 0, // don't use whitelist 3122 connection->address_type, // peer address type 3123 connection->address, // peer bd addr 3124 hci_stack->le_own_addr_type, // our addr type: 3125 hci_stack->le_connection_interval_min, // conn interval min 3126 hci_stack->le_connection_interval_max, // conn interval max 3127 hci_stack->le_connection_latency, // conn latency 3128 hci_stack->le_supervision_timeout, // conn latency 3129 hci_stack->le_minimum_ce_length, // min ce length 3130 hci_stack->le_maximum_ce_length // max ce length 3131 ); 3132 connection->state = SENT_CREATE_CONNECTION; 3133 #endif 3134 #endif 3135 break; 3136 } 3137 return; 3138 3139 #ifdef ENABLE_CLASSIC 3140 case RECEIVED_CONNECTION_REQUEST: 3141 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3142 connection->state = ACCEPTED_CONNECTION_REQUEST; 3143 connection->role = HCI_ROLE_SLAVE; 3144 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3145 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3146 } 3147 return; 3148 #endif 3149 3150 #ifdef ENABLE_BLE 3151 #ifdef ENABLE_LE_CENTRAL 3152 case SEND_CANCEL_CONNECTION: 3153 connection->state = SENT_CANCEL_CONNECTION; 3154 hci_send_cmd(&hci_le_create_connection_cancel); 3155 return; 3156 #endif 3157 #endif 3158 case SEND_DISCONNECT: 3159 connection->state = SENT_DISCONNECT; 3160 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3161 return; 3162 3163 default: 3164 break; 3165 } 3166 3167 #ifdef ENABLE_CLASSIC 3168 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3169 log_info("responding to link key request"); 3170 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3171 link_key_t link_key; 3172 link_key_type_t link_key_type; 3173 if ( hci_stack->link_key_db 3174 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3175 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3176 connection->link_key_type = link_key_type; 3177 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3178 } else { 3179 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3180 } 3181 return; 3182 } 3183 3184 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3185 log_info("denying to pin request"); 3186 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3187 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3188 return; 3189 } 3190 3191 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3192 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3193 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3194 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3195 // tweak authentication requirements 3196 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3197 if (connection->bonding_flags & BONDING_DEDICATED){ 3198 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3199 } 3200 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3201 authreq |= 1; 3202 } 3203 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3204 } else { 3205 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3206 } 3207 return; 3208 } 3209 3210 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3211 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3212 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3213 return; 3214 } 3215 3216 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3217 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3218 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3219 return; 3220 } 3221 3222 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3223 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3224 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3225 return; 3226 } 3227 3228 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3229 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3230 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3231 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3232 return; 3233 } 3234 3235 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3236 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3237 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3238 return; 3239 } 3240 3241 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3242 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3243 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3244 return; 3245 } 3246 #endif 3247 3248 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3249 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3250 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3251 return; 3252 } 3253 3254 #ifdef ENABLE_BLE 3255 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3256 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3257 3258 uint16_t connection_interval_min = connection->le_conn_interval_min; 3259 connection->le_conn_interval_min = 0; 3260 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3261 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3262 0x0000, 0xffff); 3263 } 3264 #endif 3265 } 3266 3267 hci_connection_t * connection; 3268 switch (hci_stack->state){ 3269 case HCI_STATE_INITIALIZING: 3270 hci_initializing_run(); 3271 break; 3272 3273 case HCI_STATE_HALTING: 3274 3275 log_info("HCI_STATE_HALTING"); 3276 3277 // free whitelist entries 3278 #ifdef ENABLE_BLE 3279 #ifdef ENABLE_LE_CENTRAL 3280 { 3281 btstack_linked_list_iterator_t lit; 3282 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3283 while (btstack_linked_list_iterator_has_next(&lit)){ 3284 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3285 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3286 btstack_memory_whitelist_entry_free(entry); 3287 } 3288 } 3289 #endif 3290 #endif 3291 // close all open connections 3292 connection = (hci_connection_t *) hci_stack->connections; 3293 if (connection){ 3294 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3295 if (!hci_can_send_command_packet_now()) return; 3296 3297 // check state 3298 if (connection->state == SENT_DISCONNECT) return; 3299 connection->state = SENT_DISCONNECT; 3300 3301 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3302 3303 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3304 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3305 3306 // ... which would be ignored anyway as we shutdown (free) the connection now 3307 hci_shutdown_connection(connection); 3308 3309 // finally, send the disconnect command 3310 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3311 return; 3312 } 3313 log_info("HCI_STATE_HALTING, calling off"); 3314 3315 // switch mode 3316 hci_power_control_off(); 3317 3318 log_info("HCI_STATE_HALTING, emitting state"); 3319 hci_emit_state(); 3320 log_info("HCI_STATE_HALTING, done"); 3321 break; 3322 3323 case HCI_STATE_FALLING_ASLEEP: 3324 switch(hci_stack->substate) { 3325 case HCI_FALLING_ASLEEP_DISCONNECT: 3326 log_info("HCI_STATE_FALLING_ASLEEP"); 3327 // close all open connections 3328 connection = (hci_connection_t *) hci_stack->connections; 3329 3330 #ifdef HAVE_PLATFORM_IPHONE_OS 3331 // don't close connections, if H4 supports power management 3332 if (btstack_control_iphone_power_management_enabled()){ 3333 connection = NULL; 3334 } 3335 #endif 3336 if (connection){ 3337 3338 // send disconnect 3339 if (!hci_can_send_command_packet_now()) return; 3340 3341 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3342 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3343 3344 // send disconnected event right away - causes higher layer connections to get closed, too. 3345 hci_shutdown_connection(connection); 3346 return; 3347 } 3348 3349 if (hci_classic_supported()){ 3350 // disable page and inquiry scan 3351 if (!hci_can_send_command_packet_now()) return; 3352 3353 log_info("HCI_STATE_HALTING, disabling inq scans"); 3354 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3355 3356 // continue in next sub state 3357 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3358 break; 3359 } 3360 // no break - fall through for ble-only chips 3361 3362 case HCI_FALLING_ASLEEP_COMPLETE: 3363 log_info("HCI_STATE_HALTING, calling sleep"); 3364 #ifdef HAVE_PLATFORM_IPHONE_OS 3365 // don't actually go to sleep, if H4 supports power management 3366 if (btstack_control_iphone_power_management_enabled()){ 3367 // SLEEP MODE reached 3368 hci_stack->state = HCI_STATE_SLEEPING; 3369 hci_emit_state(); 3370 break; 3371 } 3372 #endif 3373 // switch mode 3374 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3375 hci_emit_state(); 3376 break; 3377 3378 default: 3379 break; 3380 } 3381 break; 3382 3383 default: 3384 break; 3385 } 3386 } 3387 3388 int hci_send_cmd_packet(uint8_t *packet, int size){ 3389 // house-keeping 3390 3391 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3392 hci_stack->loopback_mode = packet[3]; 3393 } 3394 3395 #ifdef ENABLE_CLASSIC 3396 bd_addr_t addr; 3397 hci_connection_t * conn; 3398 3399 // create_connection? 3400 if (IS_COMMAND(packet, hci_create_connection)){ 3401 reverse_bd_addr(&packet[3], addr); 3402 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3403 3404 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3405 if (!conn){ 3406 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3407 if (!conn){ 3408 // notify client that alloc failed 3409 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3410 return 0; // don't sent packet to controller 3411 } 3412 conn->state = SEND_CREATE_CONNECTION; 3413 } 3414 log_info("conn state %u", conn->state); 3415 switch (conn->state){ 3416 // if connection active exists 3417 case OPEN: 3418 // and OPEN, emit connection complete command, don't send to controller 3419 hci_emit_connection_complete(addr, conn->con_handle, 0); 3420 return 0; 3421 case SEND_CREATE_CONNECTION: 3422 // connection created by hci, e.g. dedicated bonding 3423 break; 3424 default: 3425 // otherwise, just ignore as it is already in the open process 3426 return 0; 3427 } 3428 conn->state = SENT_CREATE_CONNECTION; 3429 } 3430 3431 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3432 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3433 } 3434 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3435 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3436 } 3437 3438 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3439 if (hci_stack->link_key_db){ 3440 reverse_bd_addr(&packet[3], addr); 3441 hci_stack->link_key_db->delete_link_key(addr); 3442 } 3443 } 3444 3445 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3446 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3447 reverse_bd_addr(&packet[3], addr); 3448 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3449 if (conn){ 3450 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3451 } 3452 } 3453 3454 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3455 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3456 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3457 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3458 reverse_bd_addr(&packet[3], addr); 3459 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3460 if (conn){ 3461 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3462 } 3463 } 3464 3465 #ifdef ENABLE_SCO_OVER_HCI 3466 // setup_synchronous_connection? Voice setting at offset 22 3467 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3468 // TODO: compare to current setting if sco connection already active 3469 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3470 } 3471 // accept_synchronus_connection? Voice setting at offset 18 3472 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3473 // TODO: compare to current setting if sco connection already active 3474 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3475 } 3476 #endif 3477 #endif 3478 3479 #ifdef ENABLE_BLE 3480 #ifdef ENABLE_LE_PERIPHERAL 3481 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3482 hci_stack->le_random_address_set = 1; 3483 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3484 } 3485 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3486 hci_stack->le_advertisements_active = packet[3]; 3487 } 3488 #endif 3489 #ifdef ENABLE_LE_CENTRAL 3490 if (IS_COMMAND(packet, hci_le_create_connection)){ 3491 // white list used? 3492 uint8_t initiator_filter_policy = packet[7]; 3493 switch (initiator_filter_policy){ 3494 case 0: 3495 // whitelist not used 3496 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3497 break; 3498 case 1: 3499 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3500 break; 3501 default: 3502 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3503 break; 3504 } 3505 } 3506 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3507 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3508 } 3509 #endif 3510 #endif 3511 3512 hci_stack->num_cmd_packets--; 3513 3514 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3515 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3516 3517 // release packet buffer for synchronous transport implementations 3518 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3519 hci_stack->hci_packet_buffer_reserved = 0; 3520 } 3521 3522 return err; 3523 } 3524 3525 // disconnect because of security block 3526 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3527 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3528 if (!connection) return; 3529 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3530 } 3531 3532 3533 // Configure Secure Simple Pairing 3534 3535 #ifdef ENABLE_CLASSIC 3536 3537 // enable will enable SSP during init 3538 void gap_ssp_set_enable(int enable){ 3539 hci_stack->ssp_enable = enable; 3540 } 3541 3542 static int hci_local_ssp_activated(void){ 3543 return gap_ssp_supported() && hci_stack->ssp_enable; 3544 } 3545 3546 // if set, BTstack will respond to io capability request using authentication requirement 3547 void gap_ssp_set_io_capability(int io_capability){ 3548 hci_stack->ssp_io_capability = io_capability; 3549 } 3550 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3551 hci_stack->ssp_authentication_requirement = authentication_requirement; 3552 } 3553 3554 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3555 void gap_ssp_set_auto_accept(int auto_accept){ 3556 hci_stack->ssp_auto_accept = auto_accept; 3557 } 3558 #endif 3559 3560 // va_list part of hci_send_cmd 3561 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3562 if (!hci_can_send_command_packet_now()){ 3563 log_error("hci_send_cmd called but cannot send packet now"); 3564 return 0; 3565 } 3566 3567 // for HCI INITIALIZATION 3568 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3569 hci_stack->last_cmd_opcode = cmd->opcode; 3570 3571 hci_reserve_packet_buffer(); 3572 uint8_t * packet = hci_stack->hci_packet_buffer; 3573 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3574 return hci_send_cmd_packet(packet, size); 3575 } 3576 3577 /** 3578 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3579 */ 3580 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3581 va_list argptr; 3582 va_start(argptr, cmd); 3583 int res = hci_send_cmd_va_arg(cmd, argptr); 3584 va_end(argptr); 3585 return res; 3586 } 3587 3588 // Create various non-HCI events. 3589 // TODO: generalize, use table similar to hci_create_command 3590 3591 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3592 // dump packet 3593 if (dump) { 3594 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3595 } 3596 3597 // dispatch to all event handlers 3598 btstack_linked_list_iterator_t it; 3599 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3600 while (btstack_linked_list_iterator_has_next(&it)){ 3601 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3602 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3603 } 3604 } 3605 3606 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3607 if (!hci_stack->acl_packet_handler) return; 3608 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3609 } 3610 3611 #ifdef ENABLE_CLASSIC 3612 static void hci_notify_if_sco_can_send_now(void){ 3613 // notify SCO sender if waiting 3614 if (!hci_stack->sco_waiting_for_can_send_now) return; 3615 if (hci_can_send_sco_packet_now()){ 3616 hci_stack->sco_waiting_for_can_send_now = 0; 3617 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3618 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3619 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3620 } 3621 } 3622 3623 // parsing end emitting has been merged to reduce code size 3624 static void gap_inquiry_explode(uint8_t * packet){ 3625 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3626 3627 uint8_t * eir_data; 3628 ad_context_t context; 3629 const uint8_t * name; 3630 uint8_t name_len; 3631 3632 int event_type = hci_event_packet_get_type(packet); 3633 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3634 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3635 3636 // event[1] is set at the end 3637 int i; 3638 for (i=0; i<num_responses;i++){ 3639 memset(event, 0, sizeof(event)); 3640 event[0] = GAP_EVENT_INQUIRY_RESULT; 3641 uint8_t event_size = 18; // if name is not set by EIR 3642 3643 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3644 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3645 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3646 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3647 3648 switch (event_type){ 3649 case HCI_EVENT_INQUIRY_RESULT: 3650 // 14,15,16,17 = 0, size 18 3651 break; 3652 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3653 event[14] = 1; 3654 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3655 // 16,17 = 0, size 18 3656 break; 3657 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3658 event[14] = 1; 3659 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3660 // for EIR packets, there is only one reponse in it 3661 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3662 name = NULL; 3663 // EIR data is 240 bytes in EIR event 3664 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3665 uint8_t data_type = ad_iterator_get_data_type(&context); 3666 uint8_t data_size = ad_iterator_get_data_len(&context); 3667 const uint8_t * data = ad_iterator_get_data(&context); 3668 // Prefer Complete Local Name over Shortend Local Name 3669 switch (data_type){ 3670 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3671 if (name) continue; 3672 /* explicit fall-through */ 3673 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3674 name = data; 3675 name_len = data_size; 3676 break; 3677 default: 3678 break; 3679 } 3680 } 3681 if (name){ 3682 event[16] = 1; 3683 // truncate name if needed 3684 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3685 event[17] = len; 3686 memcpy(&event[18], name, len); 3687 event_size += len; 3688 } 3689 break; 3690 } 3691 event[1] = event_size - 2; 3692 hci_emit_event(event, event_size, 1); 3693 } 3694 } 3695 #endif 3696 3697 void hci_emit_state(void){ 3698 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3699 uint8_t event[3]; 3700 event[0] = BTSTACK_EVENT_STATE; 3701 event[1] = sizeof(event) - 2; 3702 event[2] = hci_stack->state; 3703 hci_emit_event(event, sizeof(event), 1); 3704 } 3705 3706 #ifdef ENABLE_CLASSIC 3707 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3708 uint8_t event[13]; 3709 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3710 event[1] = sizeof(event) - 2; 3711 event[2] = status; 3712 little_endian_store_16(event, 3, con_handle); 3713 reverse_bd_addr(address, &event[5]); 3714 event[11] = 1; // ACL connection 3715 event[12] = 0; // encryption disabled 3716 hci_emit_event(event, sizeof(event), 1); 3717 } 3718 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3719 if (disable_l2cap_timeouts) return; 3720 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3721 uint8_t event[4]; 3722 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3723 event[1] = sizeof(event) - 2; 3724 little_endian_store_16(event, 2, conn->con_handle); 3725 hci_emit_event(event, sizeof(event), 1); 3726 } 3727 #endif 3728 3729 #ifdef ENABLE_BLE 3730 #ifdef ENABLE_LE_CENTRAL 3731 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3732 uint8_t event[21]; 3733 event[0] = HCI_EVENT_LE_META; 3734 event[1] = sizeof(event) - 2; 3735 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3736 event[3] = status; 3737 little_endian_store_16(event, 4, con_handle); 3738 event[6] = 0; // TODO: role 3739 event[7] = address_type; 3740 reverse_bd_addr(address, &event[8]); 3741 little_endian_store_16(event, 14, 0); // interval 3742 little_endian_store_16(event, 16, 0); // latency 3743 little_endian_store_16(event, 18, 0); // supervision timeout 3744 event[20] = 0; // master clock accuracy 3745 hci_emit_event(event, sizeof(event), 1); 3746 } 3747 #endif 3748 #endif 3749 3750 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3751 uint8_t event[6]; 3752 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3753 event[1] = sizeof(event) - 2; 3754 event[2] = 0; // status = OK 3755 little_endian_store_16(event, 3, con_handle); 3756 event[5] = reason; 3757 hci_emit_event(event, sizeof(event), 1); 3758 } 3759 3760 static void hci_emit_nr_connections_changed(void){ 3761 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3762 uint8_t event[3]; 3763 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3764 event[1] = sizeof(event) - 2; 3765 event[2] = nr_hci_connections(); 3766 hci_emit_event(event, sizeof(event), 1); 3767 } 3768 3769 static void hci_emit_hci_open_failed(void){ 3770 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3771 uint8_t event[2]; 3772 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3773 event[1] = sizeof(event) - 2; 3774 hci_emit_event(event, sizeof(event), 1); 3775 } 3776 3777 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3778 log_info("hci_emit_dedicated_bonding_result %u ", status); 3779 uint8_t event[9]; 3780 int pos = 0; 3781 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3782 event[pos++] = sizeof(event) - 2; 3783 event[pos++] = status; 3784 reverse_bd_addr(address, &event[pos]); 3785 hci_emit_event(event, sizeof(event), 1); 3786 } 3787 3788 3789 #ifdef ENABLE_CLASSIC 3790 3791 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3792 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3793 uint8_t event[5]; 3794 int pos = 0; 3795 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3796 event[pos++] = sizeof(event) - 2; 3797 little_endian_store_16(event, 2, con_handle); 3798 pos += 2; 3799 event[pos++] = level; 3800 hci_emit_event(event, sizeof(event), 1); 3801 } 3802 3803 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3804 if (!connection) return LEVEL_0; 3805 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3806 return gap_security_level_for_link_key_type(connection->link_key_type); 3807 } 3808 3809 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3810 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3811 uint8_t event[3]; 3812 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3813 event[1] = sizeof(event) - 2; 3814 event[2] = enabled; 3815 hci_emit_event(event, sizeof(event), 1); 3816 } 3817 3818 #ifdef ENABLE_CLASSIC 3819 // query if remote side supports eSCO 3820 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3821 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3822 if (!connection) return 0; 3823 return connection->remote_supported_feature_eSCO; 3824 } 3825 3826 // query if remote side supports SSP 3827 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3828 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3829 if (!connection) return 0; 3830 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3831 } 3832 3833 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3834 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3835 } 3836 #endif 3837 3838 // GAP API 3839 /** 3840 * @bbrief enable/disable bonding. default is enabled 3841 * @praram enabled 3842 */ 3843 void gap_set_bondable_mode(int enable){ 3844 hci_stack->bondable = enable ? 1 : 0; 3845 } 3846 /** 3847 * @brief Get bondable mode. 3848 * @return 1 if bondable 3849 */ 3850 int gap_get_bondable_mode(void){ 3851 return hci_stack->bondable; 3852 } 3853 3854 /** 3855 * @brief map link keys to security levels 3856 */ 3857 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3858 switch (link_key_type){ 3859 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3860 return LEVEL_4; 3861 case COMBINATION_KEY: 3862 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3863 return LEVEL_3; 3864 default: 3865 return LEVEL_2; 3866 } 3867 } 3868 3869 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3870 log_info("gap_mitm_protection_required_for_security_level %u", level); 3871 return level > LEVEL_2; 3872 } 3873 3874 /** 3875 * @brief get current security level 3876 */ 3877 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3878 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3879 if (!connection) return LEVEL_0; 3880 return gap_security_level_for_connection(connection); 3881 } 3882 3883 /** 3884 * @brief request connection to device to 3885 * @result GAP_AUTHENTICATION_RESULT 3886 */ 3887 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3888 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3889 if (!connection){ 3890 hci_emit_security_level(con_handle, LEVEL_0); 3891 return; 3892 } 3893 gap_security_level_t current_level = gap_security_level(con_handle); 3894 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3895 if (current_level >= requested_level){ 3896 hci_emit_security_level(con_handle, current_level); 3897 return; 3898 } 3899 3900 connection->requested_security_level = requested_level; 3901 3902 #if 0 3903 // sending encryption request without a link key results in an error. 3904 // TODO: figure out how to use it properly 3905 3906 // would enabling ecnryption suffice (>= LEVEL_2)? 3907 if (hci_stack->link_key_db){ 3908 link_key_type_t link_key_type; 3909 link_key_t link_key; 3910 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3911 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3912 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3913 return; 3914 } 3915 } 3916 } 3917 #endif 3918 3919 // try to authenticate connection 3920 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3921 hci_run(); 3922 } 3923 3924 /** 3925 * @brief start dedicated bonding with device. disconnect after bonding 3926 * @param device 3927 * @param request MITM protection 3928 * @result GAP_DEDICATED_BONDING_COMPLETE 3929 */ 3930 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3931 3932 // create connection state machine 3933 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3934 3935 if (!connection){ 3936 return BTSTACK_MEMORY_ALLOC_FAILED; 3937 } 3938 3939 // delete linkn key 3940 gap_drop_link_key_for_bd_addr(device); 3941 3942 // configure LEVEL_2/3, dedicated bonding 3943 connection->state = SEND_CREATE_CONNECTION; 3944 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3945 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3946 connection->bonding_flags = BONDING_DEDICATED; 3947 3948 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3949 3950 // handle: connnection failure (connection complete != ok) 3951 // handle: authentication failure 3952 // handle: disconnect on done 3953 3954 hci_run(); 3955 3956 return 0; 3957 } 3958 #endif 3959 3960 void gap_set_local_name(const char * local_name){ 3961 hci_stack->local_name = local_name; 3962 } 3963 3964 3965 #ifdef ENABLE_BLE 3966 3967 #ifdef ENABLE_LE_CENTRAL 3968 void gap_start_scan(void){ 3969 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3970 hci_stack->le_scanning_state = LE_START_SCAN; 3971 hci_run(); 3972 } 3973 3974 void gap_stop_scan(void){ 3975 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3976 hci_stack->le_scanning_state = LE_STOP_SCAN; 3977 hci_run(); 3978 } 3979 3980 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3981 hci_stack->le_scan_type = scan_type; 3982 hci_stack->le_scan_interval = scan_interval; 3983 hci_stack->le_scan_window = scan_window; 3984 hci_run(); 3985 } 3986 3987 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3988 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3989 if (!conn){ 3990 log_info("gap_connect: no connection exists yet, creating context"); 3991 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3992 if (!conn){ 3993 // notify client that alloc failed 3994 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3995 log_info("gap_connect: failed to alloc hci_connection_t"); 3996 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3997 } 3998 conn->state = SEND_CREATE_CONNECTION; 3999 log_info("gap_connect: send create connection next"); 4000 hci_run(); 4001 return 0; 4002 } 4003 4004 if (!hci_is_le_connection(conn) || 4005 conn->state == SEND_CREATE_CONNECTION || 4006 conn->state == SENT_CREATE_CONNECTION) { 4007 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4008 log_error("gap_connect: classic connection or connect is already being created"); 4009 return GATT_CLIENT_IN_WRONG_STATE; 4010 } 4011 4012 log_info("gap_connect: context exists with state %u", conn->state); 4013 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4014 hci_run(); 4015 return 0; 4016 } 4017 4018 // @assumption: only a single outgoing LE Connection exists 4019 static hci_connection_t * gap_get_outgoing_connection(void){ 4020 btstack_linked_item_t *it; 4021 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4022 hci_connection_t * conn = (hci_connection_t *) it; 4023 if (!hci_is_le_connection(conn)) continue; 4024 switch (conn->state){ 4025 case SEND_CREATE_CONNECTION: 4026 case SENT_CREATE_CONNECTION: 4027 return conn; 4028 default: 4029 break; 4030 }; 4031 } 4032 return NULL; 4033 } 4034 4035 uint8_t gap_connect_cancel(void){ 4036 hci_connection_t * conn = gap_get_outgoing_connection(); 4037 if (!conn) return 0; 4038 switch (conn->state){ 4039 case SEND_CREATE_CONNECTION: 4040 // skip sending create connection and emit event instead 4041 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4042 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4043 btstack_memory_hci_connection_free( conn ); 4044 break; 4045 case SENT_CREATE_CONNECTION: 4046 // request to send cancel connection 4047 conn->state = SEND_CANCEL_CONNECTION; 4048 hci_run(); 4049 break; 4050 default: 4051 break; 4052 } 4053 return 0; 4054 } 4055 #endif 4056 4057 #ifdef ENABLE_LE_CENTRAL 4058 /** 4059 * @brief Set connection parameters for outgoing connections 4060 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4061 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4062 * @param conn_latency, default: 4 4063 * @param supervision_timeout (unit: 10ms), default: 720 ms 4064 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4065 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4066 */ 4067 4068 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 4069 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4070 hci_stack->le_connection_interval_min = conn_interval_min; 4071 hci_stack->le_connection_interval_max = conn_interval_max; 4072 hci_stack->le_connection_latency = conn_latency; 4073 hci_stack->le_supervision_timeout = supervision_timeout; 4074 hci_stack->le_minimum_ce_length = min_ce_length; 4075 hci_stack->le_maximum_ce_length = max_ce_length; 4076 } 4077 #endif 4078 4079 /** 4080 * @brief Updates the connection parameters for a given LE connection 4081 * @param handle 4082 * @param conn_interval_min (unit: 1.25ms) 4083 * @param conn_interval_max (unit: 1.25ms) 4084 * @param conn_latency 4085 * @param supervision_timeout (unit: 10ms) 4086 * @returns 0 if ok 4087 */ 4088 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4089 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4090 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4091 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4092 connection->le_conn_interval_min = conn_interval_min; 4093 connection->le_conn_interval_max = conn_interval_max; 4094 connection->le_conn_latency = conn_latency; 4095 connection->le_supervision_timeout = supervision_timeout; 4096 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4097 hci_run(); 4098 return 0; 4099 } 4100 4101 /** 4102 * @brief Request an update of the connection parameter for a given LE connection 4103 * @param handle 4104 * @param conn_interval_min (unit: 1.25ms) 4105 * @param conn_interval_max (unit: 1.25ms) 4106 * @param conn_latency 4107 * @param supervision_timeout (unit: 10ms) 4108 * @returns 0 if ok 4109 */ 4110 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4111 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4112 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4113 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4114 connection->le_conn_interval_min = conn_interval_min; 4115 connection->le_conn_interval_max = conn_interval_max; 4116 connection->le_conn_latency = conn_latency; 4117 connection->le_supervision_timeout = supervision_timeout; 4118 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4119 hci_run(); 4120 return 0; 4121 } 4122 4123 #ifdef ENABLE_LE_PERIPHERAL 4124 4125 static void gap_advertisments_changed(void){ 4126 // disable advertisements before updating adv, scan data, or adv params 4127 if (hci_stack->le_advertisements_active){ 4128 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4129 } 4130 hci_run(); 4131 } 4132 4133 /** 4134 * @brief Set Advertisement Data 4135 * @param advertising_data_length 4136 * @param advertising_data (max 31 octets) 4137 * @note data is not copied, pointer has to stay valid 4138 */ 4139 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4140 hci_stack->le_advertisements_data_len = advertising_data_length; 4141 hci_stack->le_advertisements_data = advertising_data; 4142 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4143 gap_advertisments_changed(); 4144 } 4145 4146 /** 4147 * @brief Set Scan Response Data 4148 * @param advertising_data_length 4149 * @param advertising_data (max 31 octets) 4150 * @note data is not copied, pointer has to stay valid 4151 */ 4152 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4153 hci_stack->le_scan_response_data_len = scan_response_data_length; 4154 hci_stack->le_scan_response_data = scan_response_data; 4155 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4156 gap_advertisments_changed(); 4157 } 4158 4159 /** 4160 * @brief Set Advertisement Parameters 4161 * @param adv_int_min 4162 * @param adv_int_max 4163 * @param adv_type 4164 * @param direct_address_type 4165 * @param direct_address 4166 * @param channel_map 4167 * @param filter_policy 4168 * 4169 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4170 */ 4171 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4172 uint8_t direct_address_typ, bd_addr_t direct_address, 4173 uint8_t channel_map, uint8_t filter_policy) { 4174 4175 hci_stack->le_advertisements_interval_min = adv_int_min; 4176 hci_stack->le_advertisements_interval_max = adv_int_max; 4177 hci_stack->le_advertisements_type = adv_type; 4178 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4179 hci_stack->le_advertisements_channel_map = channel_map; 4180 hci_stack->le_advertisements_filter_policy = filter_policy; 4181 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4182 4183 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4184 gap_advertisments_changed(); 4185 } 4186 4187 /** 4188 * @brief Enable/Disable Advertisements 4189 * @param enabled 4190 */ 4191 void gap_advertisements_enable(int enabled){ 4192 hci_stack->le_advertisements_enabled = enabled; 4193 if (enabled && !hci_stack->le_advertisements_active){ 4194 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4195 } 4196 if (!enabled && hci_stack->le_advertisements_active){ 4197 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4198 } 4199 hci_run(); 4200 } 4201 4202 #endif 4203 4204 void hci_le_set_own_address_type(uint8_t own_address_type){ 4205 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4206 if (own_address_type == hci_stack->le_own_addr_type) return; 4207 hci_stack->le_own_addr_type = own_address_type; 4208 4209 #ifdef ENABLE_LE_PERIPHERAL 4210 // update advertisement parameters, too 4211 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4212 gap_advertisments_changed(); 4213 #endif 4214 #ifdef ENABLE_LE_CENTRAL 4215 // note: we don't update scan parameters or modify ongoing connection attempts 4216 #endif 4217 } 4218 4219 #endif 4220 4221 uint8_t gap_disconnect(hci_con_handle_t handle){ 4222 hci_connection_t * conn = hci_connection_for_handle(handle); 4223 if (!conn){ 4224 hci_emit_disconnection_complete(handle, 0); 4225 return 0; 4226 } 4227 conn->state = SEND_DISCONNECT; 4228 hci_run(); 4229 return 0; 4230 } 4231 4232 /** 4233 * @brief Get connection type 4234 * @param con_handle 4235 * @result connection_type 4236 */ 4237 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4238 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4239 if (!conn) return GAP_CONNECTION_INVALID; 4240 switch (conn->address_type){ 4241 case BD_ADDR_TYPE_LE_PUBLIC: 4242 case BD_ADDR_TYPE_LE_RANDOM: 4243 return GAP_CONNECTION_LE; 4244 case BD_ADDR_TYPE_SCO: 4245 return GAP_CONNECTION_SCO; 4246 case BD_ADDR_TYPE_CLASSIC: 4247 return GAP_CONNECTION_ACL; 4248 default: 4249 return GAP_CONNECTION_INVALID; 4250 } 4251 } 4252 4253 #ifdef ENABLE_BLE 4254 4255 #ifdef ENABLE_LE_CENTRAL 4256 /** 4257 * @brief Auto Connection Establishment - Start Connecting to device 4258 * @param address_typ 4259 * @param address 4260 * @returns 0 if ok 4261 */ 4262 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4263 // check capacity 4264 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4265 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4266 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4267 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4268 entry->address_type = address_type; 4269 memcpy(entry->address, address, 6); 4270 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4271 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4272 hci_run(); 4273 return 0; 4274 } 4275 4276 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4277 btstack_linked_list_iterator_t it; 4278 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4279 while (btstack_linked_list_iterator_has_next(&it)){ 4280 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4281 if (entry->address_type != address_type) continue; 4282 if (memcmp(entry->address, address, 6) != 0) continue; 4283 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4284 // remove from controller if already present 4285 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4286 continue; 4287 } 4288 // direclty remove entry from whitelist 4289 btstack_linked_list_iterator_remove(&it); 4290 btstack_memory_whitelist_entry_free(entry); 4291 } 4292 } 4293 4294 /** 4295 * @brief Auto Connection Establishment - Stop Connecting to device 4296 * @param address_typ 4297 * @param address 4298 * @returns 0 if ok 4299 */ 4300 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4301 hci_remove_from_whitelist(address_type, address); 4302 hci_run(); 4303 return 0; 4304 } 4305 4306 /** 4307 * @brief Auto Connection Establishment - Stop everything 4308 * @note Convenience function to stop all active auto connection attempts 4309 */ 4310 void gap_auto_connection_stop_all(void){ 4311 btstack_linked_list_iterator_t it; 4312 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4313 while (btstack_linked_list_iterator_has_next(&it)){ 4314 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4315 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4316 // remove from controller if already present 4317 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4318 continue; 4319 } 4320 // directly remove entry from whitelist 4321 btstack_linked_list_iterator_remove(&it); 4322 btstack_memory_whitelist_entry_free(entry); 4323 } 4324 hci_run(); 4325 } 4326 #endif 4327 #endif 4328 4329 #ifdef ENABLE_CLASSIC 4330 /** 4331 * @brief Set Extended Inquiry Response data 4332 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4333 * @note has to be done before stack starts up 4334 */ 4335 void gap_set_extended_inquiry_response(const uint8_t * data){ 4336 hci_stack->eir_data = data; 4337 } 4338 4339 /** 4340 * @brief Start GAP Classic Inquiry 4341 * @param duration in 1.28s units 4342 * @return 0 if ok 4343 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4344 */ 4345 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4346 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4347 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4348 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4349 } 4350 hci_stack->inquiry_state = duration_in_1280ms_units; 4351 hci_run(); 4352 return 0; 4353 } 4354 4355 /** 4356 * @brief Stop GAP Classic Inquiry 4357 * @returns 0 if ok 4358 */ 4359 int gap_inquiry_stop(void){ 4360 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4361 // emit inquiry complete event, before it even started 4362 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4363 hci_emit_event(event, sizeof(event), 1); 4364 return 0; 4365 } 4366 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4367 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4368 hci_run(); 4369 return 0; 4370 } 4371 4372 4373 /** 4374 * @brief Remote Name Request 4375 * @param addr 4376 * @param page_scan_repetition_mode 4377 * @param clock_offset only used when bit 15 is set 4378 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4379 */ 4380 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4381 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4382 memcpy(hci_stack->remote_name_addr, addr, 6); 4383 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4384 hci_stack->remote_name_clock_offset = clock_offset; 4385 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4386 hci_run(); 4387 return 0; 4388 } 4389 4390 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4391 hci_stack->gap_pairing_state = state; 4392 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4393 hci_run(); 4394 return 0; 4395 } 4396 4397 /** 4398 * @brief Legacy Pairing Pin Code Response 4399 * @param addr 4400 * @param pin 4401 * @return 0 if ok 4402 */ 4403 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4404 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4405 hci_stack->gap_pairing_pin = pin; 4406 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4407 } 4408 4409 /** 4410 * @brief Abort Legacy Pairing 4411 * @param addr 4412 * @param pin 4413 * @return 0 if ok 4414 */ 4415 int gap_pin_code_negative(bd_addr_t addr){ 4416 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4417 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4418 } 4419 4420 /** 4421 * @brief SSP Passkey Response 4422 * @param addr 4423 * @param passkey 4424 * @return 0 if ok 4425 */ 4426 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4427 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4428 hci_stack->gap_pairing_passkey = passkey; 4429 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4430 } 4431 4432 /** 4433 * @brief Abort SSP Passkey Entry/Pairing 4434 * @param addr 4435 * @param pin 4436 * @return 0 if ok 4437 */ 4438 int gap_ssp_passkey_negative(bd_addr_t addr){ 4439 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4440 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4441 } 4442 4443 /** 4444 * @brief Accept SSP Numeric Comparison 4445 * @param addr 4446 * @param passkey 4447 * @return 0 if ok 4448 */ 4449 int gap_ssp_confirmation_response(bd_addr_t addr){ 4450 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4451 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4452 } 4453 4454 /** 4455 * @brief Abort SSP Numeric Comparison/Pairing 4456 * @param addr 4457 * @param pin 4458 * @return 0 if ok 4459 */ 4460 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4461 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4462 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4463 } 4464 4465 /** 4466 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4467 * @param inquiry_mode see bluetooth_defines.h 4468 */ 4469 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4470 hci_stack->inquiry_mode = mode; 4471 } 4472 4473 /** 4474 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4475 */ 4476 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4477 hci_stack->sco_voice_setting = voice_setting; 4478 } 4479 4480 /** 4481 * @brief Get SCO Voice Setting 4482 * @return current voice setting 4483 */ 4484 uint16_t hci_get_sco_voice_setting(void){ 4485 return hci_stack->sco_voice_setting; 4486 } 4487 4488 /** @brief Get SCO packet length for current SCO Voice setting 4489 * @note Using SCO packets of the exact length is required for USB transfer 4490 * @return Length of SCO packets in bytes (not audio frames) 4491 */ 4492 int hci_get_sco_packet_length(void){ 4493 // see Core Spec for H2 USB Transfer. 4494 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4495 return 27; 4496 } 4497 #endif 4498 4499 4500 HCI_STATE hci_get_state(void){ 4501 return hci_stack->state; 4502 } 4503 4504 4505 /** 4506 * @brief Set callback for Bluetooth Hardware Error 4507 */ 4508 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4509 hci_stack->hardware_error_callback = fn; 4510 } 4511 4512 void hci_disconnect_all(void){ 4513 btstack_linked_list_iterator_t it; 4514 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4515 while (btstack_linked_list_iterator_has_next(&it)){ 4516 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4517 if (con->state == SENT_DISCONNECT) continue; 4518 con->state = SEND_DISCONNECT; 4519 } 4520 hci_run(); 4521 } 4522 4523 uint16_t hci_get_manufacturer(void){ 4524 return hci_stack->manufacturer; 4525 } 4526