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 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef ENABLE_CLASSIC 49 #ifdef HAVE_EMBEDDED_TICK 50 #include "btstack_run_loop_embedded.h" 51 #endif 52 #endif 53 54 #ifdef HAVE_PLATFORM_IPHONE_OS 55 #include "../port/ios/src/btstack_control_iphone.h" 56 #endif 57 58 #ifdef ENABLE_BLE 59 #include "gap.h" 60 #endif 61 62 #include <stdarg.h> 63 #include <string.h> 64 #include <stdio.h> 65 #include <inttypes.h> 66 67 #include "btstack_debug.h" 68 #include "btstack_event.h" 69 #include "btstack_linked_list.h" 70 #include "btstack_memory.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 76 77 #define HCI_CONNECTION_TIMEOUT_MS 10000 78 #define HCI_RESET_RESEND_TIMEOUT_MS 200 79 80 // prototypes 81 #ifdef ENABLE_CLASSIC 82 static void hci_update_scan_enable(void); 83 static void hci_emit_discoverable_enabled(uint8_t enabled); 84 static int hci_local_ssp_activated(void); 85 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 86 static void hci_notify_if_sco_can_send_now(void); 87 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 88 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 89 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 90 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 91 static void hci_connection_timestamp(hci_connection_t *connection); 92 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 93 #endif 94 static int hci_power_control_on(void); 95 static void hci_power_control_off(void); 96 static void hci_state_reset(void); 97 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 98 static void hci_emit_nr_connections_changed(void); 99 static void hci_emit_hci_open_failed(void); 100 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 101 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 102 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 103 static void hci_run(void); 104 static int hci_is_le_connection(hci_connection_t * connection); 105 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 106 107 #ifdef ENABLE_BLE 108 #ifdef ENABLE_LE_CENTRAL 109 // called from test/ble_client/advertising_data_parser.c 110 void le_handle_advertisement_report(uint8_t *packet, int size); 111 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 112 #endif 113 #endif 114 115 // the STACK is here 116 #ifndef HAVE_MALLOC 117 static hci_stack_t hci_stack_static; 118 #endif 119 static hci_stack_t * hci_stack = NULL; 120 121 #ifdef ENABLE_CLASSIC 122 // test helper 123 static uint8_t disable_l2cap_timeouts = 0; 124 #endif 125 126 /** 127 * create connection for given address 128 * 129 * @return connection OR NULL, if no memory left 130 */ 131 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 132 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 133 hci_connection_t * conn = btstack_memory_hci_connection_get(); 134 if (!conn) return NULL; 135 memset(conn, 0, sizeof(hci_connection_t)); 136 bd_addr_copy(conn->address, addr); 137 conn->address_type = addr_type; 138 conn->con_handle = 0xffff; 139 conn->authentication_flags = AUTH_FLAGS_NONE; 140 conn->bonding_flags = 0; 141 conn->requested_security_level = LEVEL_0; 142 #ifdef ENABLE_CLASSIC 143 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 144 btstack_run_loop_set_timer_context(&conn->timeout, conn); 145 hci_connection_timestamp(conn); 146 #endif 147 conn->acl_recombination_length = 0; 148 conn->acl_recombination_pos = 0; 149 conn->num_acl_packets_sent = 0; 150 conn->num_sco_packets_sent = 0; 151 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 152 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 153 return conn; 154 } 155 156 157 /** 158 * get le connection parameter range 159 * 160 * @return le connection parameter range struct 161 */ 162 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 163 *range = hci_stack->le_connection_parameter_range; 164 } 165 166 /** 167 * set le connection parameter range 168 * 169 */ 170 171 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 172 hci_stack->le_connection_parameter_range = *range; 173 } 174 175 /** 176 * get hci connections iterator 177 * 178 * @return hci connections iterator 179 */ 180 181 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 182 btstack_linked_list_iterator_init(it, &hci_stack->connections); 183 } 184 185 /** 186 * get connection for a given handle 187 * 188 * @return connection OR NULL, if not found 189 */ 190 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 191 btstack_linked_list_iterator_t it; 192 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 193 while (btstack_linked_list_iterator_has_next(&it)){ 194 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 195 if ( item->con_handle == con_handle ) { 196 return item; 197 } 198 } 199 return NULL; 200 } 201 202 /** 203 * get connection for given address 204 * 205 * @return connection OR NULL, if not found 206 */ 207 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 212 if (connection->address_type != addr_type) continue; 213 if (memcmp(addr, connection->address, 6) != 0) continue; 214 return connection; 215 } 216 return NULL; 217 } 218 219 220 #ifdef ENABLE_CLASSIC 221 222 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 223 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 224 #ifdef HAVE_EMBEDDED_TICK 225 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 226 // connections might be timed out 227 hci_emit_l2cap_check_timeout(connection); 228 } 229 #else 230 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 231 // connections might be timed out 232 hci_emit_l2cap_check_timeout(connection); 233 } 234 #endif 235 } 236 237 static void hci_connection_timestamp(hci_connection_t *connection){ 238 #ifdef HAVE_EMBEDDED_TICK 239 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 240 #else 241 connection->timestamp = btstack_run_loop_get_time_ms(); 242 #endif 243 } 244 245 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 246 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 247 } 248 249 250 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 251 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 252 } 253 254 /** 255 * add authentication flags and reset timer 256 * @note: assumes classic connection 257 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 258 */ 259 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 260 bd_addr_t addr; 261 reverse_bd_addr(bd_addr, addr); 262 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 263 if (conn) { 264 connectionSetAuthenticationFlags(conn, flags); 265 hci_connection_timestamp(conn); 266 } 267 } 268 269 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 270 hci_connection_t * conn = hci_connection_for_handle(handle); 271 if (!conn) return 0; 272 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 273 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 274 return 0; 275 } 276 277 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 278 if (!hci_stack->link_key_db) return; 279 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 280 hci_stack->link_key_db->delete_link_key(addr); 281 } 282 283 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 284 if (!hci_stack->link_key_db) return; 285 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 286 hci_stack->link_key_db->put_link_key(addr, link_key, type); 287 } 288 #endif 289 290 static int hci_is_le_connection(hci_connection_t * connection){ 291 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 292 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 293 } 294 295 /** 296 * count connections 297 */ 298 static int nr_hci_connections(void){ 299 int count = 0; 300 btstack_linked_item_t *it; 301 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 302 return count; 303 } 304 305 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 306 307 unsigned int num_packets_sent_classic = 0; 308 unsigned int num_packets_sent_le = 0; 309 310 btstack_linked_item_t *it; 311 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 312 hci_connection_t * connection = (hci_connection_t *) it; 313 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 314 num_packets_sent_classic += connection->num_acl_packets_sent; 315 } else { 316 num_packets_sent_le += connection->num_acl_packets_sent; 317 } 318 } 319 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 320 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 321 int free_slots_le = 0; 322 323 if (free_slots_classic < 0){ 324 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); 325 return 0; 326 } 327 328 if (hci_stack->le_acl_packets_total_num){ 329 // if we have LE slots, they are used 330 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 331 if (free_slots_le < 0){ 332 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); 333 return 0; 334 } 335 } else { 336 // otherwise, classic slots are used for LE, too 337 free_slots_classic -= num_packets_sent_le; 338 if (free_slots_classic < 0){ 339 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); 340 return 0; 341 } 342 } 343 344 switch (address_type){ 345 case BD_ADDR_TYPE_UNKNOWN: 346 log_error("hci_number_free_acl_slots: unknown address type"); 347 return 0; 348 349 case BD_ADDR_TYPE_CLASSIC: 350 return free_slots_classic; 351 352 default: 353 if (hci_stack->le_acl_packets_total_num){ 354 return free_slots_le; 355 } 356 return free_slots_classic; 357 } 358 } 359 360 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 361 // get connection type 362 hci_connection_t * connection = hci_connection_for_handle(con_handle); 363 if (!connection){ 364 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 365 return 0; 366 } 367 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 368 } 369 370 #ifdef ENABLE_CLASSIC 371 static int hci_number_free_sco_slots(void){ 372 unsigned int num_sco_packets_sent = 0; 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 num_sco_packets_sent += connection->num_sco_packets_sent; 377 } 378 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 379 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 380 return 0; 381 } 382 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 383 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 384 } 385 #endif 386 387 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 388 int hci_can_send_command_packet_now(void){ 389 if (hci_stack->hci_packet_buffer_reserved) return 0; 390 391 // check for async hci transport implementations 392 if (hci_stack->hci_transport->can_send_packet_now){ 393 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 394 return 0; 395 } 396 } 397 398 return hci_stack->num_cmd_packets > 0; 399 } 400 401 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 402 // check for async hci transport implementations 403 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 404 return hci_stack->hci_transport->can_send_packet_now(packet_type); 405 } 406 407 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 408 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 409 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 410 } 411 412 int hci_can_send_acl_le_packet_now(void){ 413 if (hci_stack->hci_packet_buffer_reserved) return 0; 414 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 415 } 416 417 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 418 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 419 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 420 } 421 422 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 423 if (hci_stack->hci_packet_buffer_reserved) return 0; 424 return hci_can_send_prepared_acl_packet_now(con_handle); 425 } 426 427 #ifdef ENABLE_CLASSIC 428 int hci_can_send_acl_classic_packet_now(void){ 429 if (hci_stack->hci_packet_buffer_reserved) return 0; 430 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 431 } 432 433 int hci_can_send_prepared_sco_packet_now(void){ 434 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 435 if (!hci_stack->synchronous_flow_control_enabled) return 1; 436 return hci_number_free_sco_slots() > 0; 437 } 438 439 int hci_can_send_sco_packet_now(void){ 440 if (hci_stack->hci_packet_buffer_reserved) return 0; 441 return hci_can_send_prepared_sco_packet_now(); 442 } 443 444 void hci_request_sco_can_send_now_event(void){ 445 hci_stack->sco_waiting_for_can_send_now = 1; 446 hci_notify_if_sco_can_send_now(); 447 } 448 #endif 449 450 // used for internal checks in l2cap.c 451 int hci_is_packet_buffer_reserved(void){ 452 return hci_stack->hci_packet_buffer_reserved; 453 } 454 455 // reserves outgoing packet buffer. @returns 1 if successful 456 int hci_reserve_packet_buffer(void){ 457 if (hci_stack->hci_packet_buffer_reserved) { 458 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 459 return 0; 460 } 461 hci_stack->hci_packet_buffer_reserved = 1; 462 return 1; 463 } 464 465 void hci_release_packet_buffer(void){ 466 hci_stack->hci_packet_buffer_reserved = 0; 467 } 468 469 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 470 static int hci_transport_synchronous(void){ 471 return hci_stack->hci_transport->can_send_packet_now == NULL; 472 } 473 474 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 475 476 // 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); 477 478 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 479 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 480 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 481 max_acl_data_packet_length = hci_stack->le_data_packets_length; 482 } 483 484 // testing: reduce buffer to minimum 485 // max_acl_data_packet_length = 52; 486 487 log_debug("hci_send_acl_packet_fragments entered"); 488 489 int err; 490 // multiple packets could be send on a synchronous HCI transport 491 while (1){ 492 493 log_debug("hci_send_acl_packet_fragments loop entered"); 494 495 // get current data 496 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 497 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 498 int more_fragments = 0; 499 500 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 501 if (current_acl_data_packet_length > max_acl_data_packet_length){ 502 more_fragments = 1; 503 current_acl_data_packet_length = max_acl_data_packet_length; 504 } 505 506 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 507 if (acl_header_pos > 0){ 508 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 509 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 510 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 511 } 512 513 // update header len 514 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 515 516 // count packet 517 connection->num_acl_packets_sent++; 518 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 519 520 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 521 if (more_fragments){ 522 // update start of next fragment to send 523 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 524 } else { 525 // done 526 hci_stack->acl_fragmentation_pos = 0; 527 hci_stack->acl_fragmentation_total_size = 0; 528 } 529 530 // send packet 531 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 532 const int size = current_acl_data_packet_length + 4; 533 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 534 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 535 536 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 537 538 // done yet? 539 if (!more_fragments) break; 540 541 // can send more? 542 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 543 } 544 545 log_debug("hci_send_acl_packet_fragments loop over"); 546 547 // release buffer now for synchronous transport 548 if (hci_transport_synchronous()){ 549 hci_release_packet_buffer(); 550 // notify upper stack that it might be possible to send again 551 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 552 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 553 } 554 555 return err; 556 } 557 558 // pre: caller has reserved the packet buffer 559 int hci_send_acl_packet_buffer(int size){ 560 561 // log_info("hci_send_acl_packet_buffer size %u", size); 562 563 if (!hci_stack->hci_packet_buffer_reserved) { 564 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 565 return 0; 566 } 567 568 uint8_t * packet = hci_stack->hci_packet_buffer; 569 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 570 571 // check for free places on Bluetooth module 572 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 573 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 574 hci_release_packet_buffer(); 575 return BTSTACK_ACL_BUFFERS_FULL; 576 } 577 578 hci_connection_t *connection = hci_connection_for_handle( con_handle); 579 if (!connection) { 580 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 581 hci_release_packet_buffer(); 582 return 0; 583 } 584 585 #ifdef ENABLE_CLASSIC 586 hci_connection_timestamp(connection); 587 #endif 588 589 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 590 591 // setup data 592 hci_stack->acl_fragmentation_total_size = size; 593 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 594 595 return hci_send_acl_packet_fragments(connection); 596 } 597 598 #ifdef ENABLE_CLASSIC 599 // pre: caller has reserved the packet buffer 600 int hci_send_sco_packet_buffer(int size){ 601 602 // log_info("hci_send_acl_packet_buffer size %u", size); 603 604 if (!hci_stack->hci_packet_buffer_reserved) { 605 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 606 return 0; 607 } 608 609 uint8_t * packet = hci_stack->hci_packet_buffer; 610 611 // skip checks in loopback mode 612 if (!hci_stack->loopback_mode){ 613 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 614 615 // check for free places on Bluetooth module 616 if (!hci_can_send_prepared_sco_packet_now()) { 617 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 618 hci_release_packet_buffer(); 619 return BTSTACK_ACL_BUFFERS_FULL; 620 } 621 622 // track send packet in connection struct 623 hci_connection_t *connection = hci_connection_for_handle( con_handle); 624 if (!connection) { 625 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 626 hci_release_packet_buffer(); 627 return 0; 628 } 629 connection->num_sco_packets_sent++; 630 } 631 632 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 633 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 634 635 if (hci_transport_synchronous()){ 636 hci_release_packet_buffer(); 637 // notify upper stack that it might be possible to send again 638 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 639 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 640 } 641 642 return err; 643 } 644 #endif 645 646 static void acl_handler(uint8_t *packet, int size){ 647 648 // log_info("acl_handler: size %u", size); 649 650 // get info 651 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 652 hci_connection_t *conn = hci_connection_for_handle(con_handle); 653 uint8_t acl_flags = READ_ACL_FLAGS(packet); 654 uint16_t acl_length = READ_ACL_LENGTH(packet); 655 656 // ignore non-registered handle 657 if (!conn){ 658 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 659 return; 660 } 661 662 // assert packet is complete 663 if (acl_length + 4 != size){ 664 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 665 return; 666 } 667 668 #ifdef ENABLE_CLASSIC 669 // update idle timestamp 670 hci_connection_timestamp(conn); 671 #endif 672 673 // handle different packet types 674 switch (acl_flags & 0x03) { 675 676 case 0x01: // continuation fragment 677 678 // sanity checks 679 if (conn->acl_recombination_pos == 0) { 680 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 681 return; 682 } 683 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 684 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 685 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 686 conn->acl_recombination_pos = 0; 687 return; 688 } 689 690 // append fragment payload (header already stored) 691 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 692 conn->acl_recombination_pos += acl_length; 693 694 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 695 // conn->acl_recombination_pos, conn->acl_recombination_length); 696 697 // forward complete L2CAP packet if complete. 698 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 699 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 700 // reset recombination buffer 701 conn->acl_recombination_length = 0; 702 conn->acl_recombination_pos = 0; 703 } 704 break; 705 706 case 0x02: { // first fragment 707 708 // sanity check 709 if (conn->acl_recombination_pos) { 710 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 711 conn->acl_recombination_pos = 0; 712 } 713 714 // peek into L2CAP packet! 715 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 716 717 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 718 719 // compare fragment size to L2CAP packet size 720 if (acl_length >= l2cap_length + 4){ 721 // forward fragment as L2CAP packet 722 hci_emit_acl_packet(packet, acl_length + 4); 723 } else { 724 725 if (acl_length > HCI_ACL_BUFFER_SIZE){ 726 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 727 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 728 return; 729 } 730 731 // store first fragment and tweak acl length for complete package 732 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 733 conn->acl_recombination_pos = acl_length + 4; 734 conn->acl_recombination_length = l2cap_length; 735 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 736 } 737 break; 738 739 } 740 default: 741 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 742 return; 743 } 744 745 // execute main loop 746 hci_run(); 747 } 748 749 static void hci_shutdown_connection(hci_connection_t *conn){ 750 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 751 752 btstack_run_loop_remove_timer(&conn->timeout); 753 754 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 755 btstack_memory_hci_connection_free( conn ); 756 757 // now it's gone 758 hci_emit_nr_connections_changed(); 759 } 760 761 #ifdef ENABLE_CLASSIC 762 763 static const uint16_t packet_type_sizes[] = { 764 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 765 HCI_ACL_DH1_SIZE, 0, 0, 0, 766 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 767 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 768 }; 769 static const uint8_t packet_type_feature_requirement_bit[] = { 770 0, // 3 slot packets 771 1, // 5 slot packets 772 25, // EDR 2 mpbs 773 26, // EDR 3 mbps 774 39, // 3 slot EDR packts 775 40, // 5 slot EDR packet 776 }; 777 static const uint16_t packet_type_feature_packet_mask[] = { 778 0x0f00, // 3 slot packets 779 0xf000, // 5 slot packets 780 0x1102, // EDR 2 mpbs 781 0x2204, // EDR 3 mbps 782 0x0300, // 3 slot EDR packts 783 0x3000, // 5 slot EDR packet 784 }; 785 786 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 787 // enable packet types based on size 788 uint16_t packet_types = 0; 789 unsigned int i; 790 for (i=0;i<16;i++){ 791 if (packet_type_sizes[i] == 0) continue; 792 if (packet_type_sizes[i] <= buffer_size){ 793 packet_types |= 1 << i; 794 } 795 } 796 // disable packet types due to missing local supported features 797 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 798 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 799 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 800 if (feature_set) continue; 801 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 802 packet_types &= ~packet_type_feature_packet_mask[i]; 803 } 804 // flip bits for "may not be used" 805 packet_types ^= 0x3306; 806 return packet_types; 807 } 808 809 uint16_t hci_usable_acl_packet_types(void){ 810 return hci_stack->packet_types; 811 } 812 #endif 813 814 uint8_t* hci_get_outgoing_packet_buffer(void){ 815 // hci packet buffer is >= acl data packet length 816 return hci_stack->hci_packet_buffer; 817 } 818 819 uint16_t hci_max_acl_data_packet_length(void){ 820 return hci_stack->acl_data_packet_length; 821 } 822 823 #ifdef ENABLE_CLASSIC 824 int hci_extended_sco_link_supported(void){ 825 // No. 31, byte 3, bit 7 826 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 827 } 828 #endif 829 830 int hci_non_flushable_packet_boundary_flag_supported(void){ 831 // No. 54, byte 6, bit 6 832 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 833 } 834 835 static int gap_ssp_supported(void){ 836 // No. 51, byte 6, bit 3 837 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 838 } 839 840 static int hci_classic_supported(void){ 841 #ifdef ENABLE_CLASSIC 842 // No. 37, byte 4, bit 5, = No BR/EDR Support 843 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 844 #else 845 return 0; 846 #endif 847 } 848 849 static int hci_le_supported(void){ 850 #ifdef ENABLE_BLE 851 // No. 37, byte 4, bit 6 = LE Supported (Controller) 852 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 853 #else 854 return 0; 855 #endif 856 } 857 858 #ifdef ENABLE_BLE 859 860 /** 861 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 862 */ 863 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 864 *addr_type = hci_stack->le_own_addr_type; 865 if (hci_stack->le_own_addr_type){ 866 memcpy(addr, hci_stack->le_random_address, 6); 867 } else { 868 memcpy(addr, hci_stack->local_bd_addr, 6); 869 } 870 } 871 872 #ifdef ENABLE_LE_CENTRAL 873 void le_handle_advertisement_report(uint8_t *packet, int size){ 874 875 UNUSED(size); 876 877 int offset = 3; 878 int num_reports = packet[offset]; 879 offset += 1; 880 881 int i; 882 // log_info("HCI: handle adv report with num reports: %d", num_reports); 883 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 884 for (i=0; i<num_reports;i++){ 885 uint8_t data_length = packet[offset + 8]; 886 uint8_t event_size = 10 + data_length; 887 int pos = 0; 888 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 889 event[pos++] = event_size; 890 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 891 offset += 8; 892 pos += 8; 893 event[pos++] = packet[offset + 1 + data_length]; // rssi 894 event[pos++] = packet[offset++]; //data_length; 895 memcpy(&event[pos], &packet[offset], data_length); 896 pos += data_length; 897 offset += data_length + 1; // rssi 898 hci_emit_event(event, pos, 1); 899 } 900 } 901 #endif 902 #endif 903 904 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 905 906 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 907 if (!hci_stack->config) return 0; 908 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 909 // Limit baud rate for Broadcom chipsets to 3 mbps 910 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 911 baud_rate = 3000000; 912 } 913 return baud_rate; 914 } 915 916 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 917 UNUSED(ds); 918 919 switch (hci_stack->substate){ 920 case HCI_INIT_W4_SEND_RESET: 921 log_info("Resend HCI Reset"); 922 hci_stack->substate = HCI_INIT_SEND_RESET; 923 hci_stack->num_cmd_packets = 1; 924 hci_run(); 925 break; 926 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 927 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 928 if (hci_stack->hci_transport->reset_link){ 929 hci_stack->hci_transport->reset_link(); 930 } 931 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 932 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 933 log_info("Resend HCI Reset - CSR Warm Boot"); 934 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 935 hci_stack->num_cmd_packets = 1; 936 hci_run(); 937 break; 938 case HCI_INIT_W4_SEND_BAUD_CHANGE: 939 if (hci_stack->hci_transport->set_baudrate){ 940 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 941 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 942 hci_stack->hci_transport->set_baudrate(baud_rate); 943 } 944 // For CSR, HCI Reset is sent on new baud rate 945 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 946 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 947 hci_run(); 948 } 949 break; 950 default: 951 break; 952 } 953 } 954 #endif 955 956 static void hci_initializing_next_state(void){ 957 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 958 } 959 960 // assumption: hci_can_send_command_packet_now() == true 961 static void hci_initializing_run(void){ 962 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 963 switch (hci_stack->substate){ 964 case HCI_INIT_SEND_RESET: 965 hci_state_reset(); 966 967 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 968 // prepare reset if command complete not received in 100ms 969 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 970 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 971 btstack_run_loop_add_timer(&hci_stack->timeout); 972 #endif 973 // send command 974 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 975 hci_send_cmd(&hci_reset); 976 break; 977 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 978 hci_send_cmd(&hci_read_local_version_information); 979 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 980 break; 981 case HCI_INIT_SEND_READ_LOCAL_NAME: 982 hci_send_cmd(&hci_read_local_name); 983 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 984 break; 985 986 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 987 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 988 hci_state_reset(); 989 // prepare reset if command complete not received in 100ms 990 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 991 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 992 btstack_run_loop_add_timer(&hci_stack->timeout); 993 // send command 994 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 995 hci_send_cmd(&hci_reset); 996 break; 997 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 998 hci_state_reset(); 999 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1000 hci_send_cmd(&hci_reset); 1001 break; 1002 case HCI_INIT_SEND_BAUD_CHANGE: { 1003 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1004 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1005 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1006 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1007 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1008 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1009 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1010 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1011 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1012 btstack_run_loop_add_timer(&hci_stack->timeout); 1013 } 1014 break; 1015 } 1016 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1017 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1018 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1019 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1020 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1021 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1022 break; 1023 } 1024 case HCI_INIT_CUSTOM_INIT: 1025 // Custom initialization 1026 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1027 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1028 if (valid_cmd){ 1029 int size = 3 + hci_stack->hci_packet_buffer[2]; 1030 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1031 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1032 switch (valid_cmd) { 1033 case 1: 1034 default: 1035 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1036 break; 1037 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1038 log_info("CSR Warm Boot"); 1039 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1040 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1041 btstack_run_loop_add_timer(&hci_stack->timeout); 1042 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1043 && hci_stack->config 1044 && hci_stack->chipset 1045 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1046 && hci_stack->hci_transport->set_baudrate 1047 && hci_transport_uart_get_main_baud_rate()){ 1048 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1049 } else { 1050 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1051 } 1052 break; 1053 } 1054 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1055 break; 1056 } 1057 log_info("Init script done"); 1058 1059 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1060 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1061 int need_baud_change = hci_stack->config 1062 && hci_stack->chipset 1063 && hci_stack->chipset->set_baudrate_command 1064 && hci_stack->hci_transport->set_baudrate 1065 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1066 if (need_baud_change) { 1067 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1068 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1069 hci_stack->hci_transport->set_baudrate(baud_rate); 1070 } 1071 } 1072 } 1073 // otherwise continue 1074 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1075 hci_send_cmd(&hci_read_local_supported_commands); 1076 break; 1077 case HCI_INIT_SET_BD_ADDR: 1078 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1079 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1080 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1081 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1082 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1083 break; 1084 #endif 1085 1086 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1087 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1088 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1089 hci_send_cmd(&hci_read_local_supported_commands); 1090 break; 1091 case HCI_INIT_READ_BD_ADDR: 1092 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1093 hci_send_cmd(&hci_read_bd_addr); 1094 break; 1095 case HCI_INIT_READ_BUFFER_SIZE: 1096 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1097 hci_send_cmd(&hci_read_buffer_size); 1098 break; 1099 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1100 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1101 hci_send_cmd(&hci_read_local_supported_features); 1102 break; 1103 case HCI_INIT_SET_EVENT_MASK: 1104 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1105 if (hci_le_supported()){ 1106 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1107 } else { 1108 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1109 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1110 } 1111 break; 1112 #ifdef ENABLE_CLASSIC 1113 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1114 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1115 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1116 break; 1117 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1118 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1119 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1120 break; 1121 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1122 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1123 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1124 break; 1125 case HCI_INIT_WRITE_LOCAL_NAME: 1126 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1127 if (hci_stack->local_name){ 1128 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1129 } else { 1130 char local_name[8+17+1]; 1131 // BTstack 11:22:33:44:55:66 1132 memcpy(local_name, "BTstack ", 8); 1133 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1134 local_name[8+17] = '\0'; 1135 log_info("---> Name %s", local_name); 1136 hci_send_cmd(&hci_write_local_name, local_name); 1137 } 1138 break; 1139 case HCI_INIT_WRITE_EIR_DATA: 1140 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1141 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1142 break; 1143 case HCI_INIT_WRITE_INQUIRY_MODE: 1144 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1145 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1146 break; 1147 case HCI_INIT_WRITE_SCAN_ENABLE: 1148 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1149 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1150 break; 1151 // only sent if ENABLE_SCO_OVER_HCI is defined 1152 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1153 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1154 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1155 break; 1156 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1157 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1158 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1159 break; 1160 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1161 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1162 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1163 log_info("BCM: Route SCO data via HCI transport"); 1164 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1165 break; 1166 1167 #endif 1168 #ifdef ENABLE_BLE 1169 // LE INIT 1170 case HCI_INIT_LE_READ_BUFFER_SIZE: 1171 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1172 hci_send_cmd(&hci_le_read_buffer_size); 1173 break; 1174 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1175 // LE Supported Host = 1, Simultaneous Host = 0 1176 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1177 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1178 break; 1179 #ifdef ENABLE_LE_CENTRAL 1180 case HCI_INIT_READ_WHITE_LIST_SIZE: 1181 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1182 hci_send_cmd(&hci_le_read_white_list_size); 1183 break; 1184 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1185 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1186 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1187 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1188 break; 1189 #endif 1190 #endif 1191 default: 1192 return; 1193 } 1194 } 1195 1196 static void hci_init_done(void){ 1197 // done. tell the app 1198 log_info("hci_init_done -> HCI_STATE_WORKING"); 1199 hci_stack->state = HCI_STATE_WORKING; 1200 hci_emit_state(); 1201 hci_run(); 1202 } 1203 1204 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1205 UNUSED(size); 1206 1207 uint8_t command_completed = 0; 1208 1209 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1210 uint16_t opcode = little_endian_read_16(packet,3); 1211 if (opcode == hci_stack->last_cmd_opcode){ 1212 command_completed = 1; 1213 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1214 } else { 1215 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1216 } 1217 } 1218 1219 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1220 uint8_t status = packet[2]; 1221 uint16_t opcode = little_endian_read_16(packet,4); 1222 if (opcode == hci_stack->last_cmd_opcode){ 1223 if (status){ 1224 command_completed = 1; 1225 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1226 } else { 1227 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1228 } 1229 } else { 1230 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1231 } 1232 } 1233 1234 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1235 1236 // Vendor == CSR 1237 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1238 // TODO: track actual command 1239 command_completed = 1; 1240 } 1241 1242 // Vendor == Toshiba 1243 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1244 // TODO: track actual command 1245 command_completed = 1; 1246 } 1247 1248 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1249 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1250 // 1251 // HCI Reset 1252 // Timeout 100 ms 1253 // HCI Reset 1254 // Command Complete Reset 1255 // HCI Read Local Version Information 1256 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1257 // hang... 1258 // 1259 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1260 if (!command_completed 1261 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1262 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1263 1264 uint16_t opcode = little_endian_read_16(packet,3); 1265 if (opcode == hci_reset.opcode){ 1266 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1267 return; 1268 } 1269 } 1270 1271 // CSR & H5 1272 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1273 if (!command_completed 1274 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1275 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1276 1277 uint16_t opcode = little_endian_read_16(packet,3); 1278 if (opcode == hci_reset.opcode){ 1279 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1280 return; 1281 } 1282 } 1283 1284 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1285 // fix: Correct substate and behave as command below 1286 if (command_completed){ 1287 switch (hci_stack->substate){ 1288 case HCI_INIT_SEND_RESET: 1289 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1290 break; 1291 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1292 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1293 break; 1294 default: 1295 break; 1296 } 1297 } 1298 1299 #endif 1300 1301 if (!command_completed) return; 1302 1303 int need_baud_change = 0; 1304 int need_addr_change = 0; 1305 1306 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1307 need_baud_change = hci_stack->config 1308 && hci_stack->chipset 1309 && hci_stack->chipset->set_baudrate_command 1310 && hci_stack->hci_transport->set_baudrate 1311 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1312 1313 need_addr_change = hci_stack->custom_bd_addr_set 1314 && hci_stack->chipset 1315 && hci_stack->chipset->set_bd_addr_command; 1316 #endif 1317 1318 switch(hci_stack->substate){ 1319 1320 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1321 case HCI_INIT_SEND_RESET: 1322 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1323 // fix: just correct substate and behave as command below 1324 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1325 btstack_run_loop_remove_timer(&hci_stack->timeout); 1326 break; 1327 case HCI_INIT_W4_SEND_RESET: 1328 btstack_run_loop_remove_timer(&hci_stack->timeout); 1329 break; 1330 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1331 log_info("Received local name, need baud change %d", need_baud_change); 1332 if (need_baud_change){ 1333 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1334 return; 1335 } 1336 // skip baud change 1337 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1338 return; 1339 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1340 // for STLC2500D, baud rate change already happened. 1341 // for others, baud rate gets changed now 1342 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1343 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1344 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1345 hci_stack->hci_transport->set_baudrate(baud_rate); 1346 } 1347 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1348 return; 1349 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1350 btstack_run_loop_remove_timer(&hci_stack->timeout); 1351 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1352 return; 1353 case HCI_INIT_W4_CUSTOM_INIT: 1354 // repeat custom init 1355 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1356 return; 1357 #else 1358 case HCI_INIT_W4_SEND_RESET: 1359 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1360 return ; 1361 #endif 1362 1363 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1364 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1365 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1366 return; 1367 } 1368 if (need_addr_change){ 1369 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1370 return; 1371 } 1372 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1373 return; 1374 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1375 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1376 if (need_baud_change){ 1377 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1378 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1379 hci_stack->hci_transport->set_baudrate(baud_rate); 1380 } 1381 if (need_addr_change){ 1382 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1383 return; 1384 } 1385 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1386 return; 1387 case HCI_INIT_W4_SET_BD_ADDR: 1388 // for STLC2500D, bd addr change only gets active after sending reset command 1389 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1390 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1391 return; 1392 } 1393 // skipping st warm boot 1394 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1395 return; 1396 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1397 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1398 return; 1399 #endif 1400 case HCI_INIT_W4_READ_BD_ADDR: 1401 // only read buffer size if supported 1402 if (hci_stack->local_supported_commands[0] & 0x01) { 1403 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1404 return; 1405 } 1406 // skipping read buffer size 1407 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1408 return; 1409 case HCI_INIT_W4_SET_EVENT_MASK: 1410 // skip Classic init commands for LE only chipsets 1411 if (!hci_classic_supported()){ 1412 if (hci_le_supported()){ 1413 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1414 return; 1415 } else { 1416 log_error("Neither BR/EDR nor LE supported"); 1417 hci_init_done(); 1418 return; 1419 } 1420 } 1421 if (!gap_ssp_supported()){ 1422 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1423 return; 1424 } 1425 break; 1426 #ifdef ENABLE_BLE 1427 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1428 // skip write le host if not supported (e.g. on LE only EM9301) 1429 if (hci_stack->local_supported_commands[0] & 0x02) break; 1430 #ifdef ENABLE_LE_CENTRAL 1431 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1432 #else 1433 hci_init_done(); 1434 #endif 1435 return; 1436 #endif 1437 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1438 // skip write eir data if no eir data set 1439 if (hci_stack->eir_data) break; 1440 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1441 return; 1442 1443 #ifdef ENABLE_SCO_OVER_HCI 1444 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1445 // skip write synchronous flow control if not supported 1446 if (hci_stack->local_supported_commands[0] & 0x04) break; 1447 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1448 // explicit fall through to reduce repetitions 1449 1450 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1451 // skip write default erroneous data reporting if not supported 1452 if (hci_stack->local_supported_commands[0] & 0x08) break; 1453 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1454 // explicit fall through to reduce repetitions 1455 1456 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1457 // skip bcm set sco pcm config on non-Broadcom chipsets 1458 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION) break; 1459 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1460 // explicit fall through to reduce repetitions 1461 1462 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1463 if (!hci_le_supported()){ 1464 // SKIP LE init for Classic only configuration 1465 hci_init_done(); 1466 return; 1467 } 1468 break; 1469 #else 1470 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1471 if (!hci_le_supported()){ 1472 // SKIP LE init for Classic only configuration 1473 hci_init_done(); 1474 return; 1475 } 1476 #endif 1477 break; 1478 // Response to command before init done state -> init done 1479 case (HCI_INIT_DONE-1): 1480 hci_init_done(); 1481 return; 1482 1483 default: 1484 break; 1485 } 1486 hci_initializing_next_state(); 1487 } 1488 1489 static void event_handler(uint8_t *packet, int size){ 1490 1491 uint16_t event_length = packet[1]; 1492 1493 // assert packet is complete 1494 if (size != event_length + 2){ 1495 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1496 return; 1497 } 1498 1499 bd_addr_t addr; 1500 bd_addr_type_t addr_type; 1501 uint8_t link_type; 1502 hci_con_handle_t handle; 1503 hci_connection_t * conn; 1504 int i; 1505 1506 // warnings 1507 (void) link_type; 1508 1509 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1510 1511 switch (hci_event_packet_get_type(packet)) { 1512 1513 case HCI_EVENT_COMMAND_COMPLETE: 1514 // get num cmd packets - limit to 1 to reduce complexity 1515 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1516 1517 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1518 if (packet[5]) break; 1519 // terminate, name 248 chars 1520 packet[6+248] = 0; 1521 log_info("local name: %s", &packet[6]); 1522 } 1523 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1524 // from offset 5 1525 // status 1526 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1527 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1528 hci_stack->sco_data_packet_length = packet[8]; 1529 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1530 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1531 1532 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1533 // determine usable ACL payload size 1534 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1535 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1536 } 1537 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1538 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1539 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1540 } 1541 } 1542 #ifdef ENABLE_BLE 1543 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1544 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1545 hci_stack->le_acl_packets_total_num = packet[8]; 1546 // determine usable ACL payload size 1547 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1548 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1549 } 1550 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1551 } 1552 #ifdef ENABLE_LE_CENTRAL 1553 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1554 hci_stack->le_whitelist_capacity = packet[6]; 1555 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1556 } 1557 #endif 1558 #endif 1559 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1560 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1561 hci_stack->local_bd_addr); 1562 log_info("Local Address, Status: 0x%02x: Addr: %s", 1563 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1564 #ifdef ENABLE_CLASSIC 1565 if (hci_stack->link_key_db){ 1566 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1567 } 1568 #endif 1569 } 1570 #ifdef ENABLE_CLASSIC 1571 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1572 hci_emit_discoverable_enabled(hci_stack->discoverable); 1573 } 1574 #endif 1575 1576 // Note: HCI init checks 1577 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1578 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1579 1580 #ifdef ENABLE_CLASSIC 1581 // determine usable ACL packet types based on host buffer size and supported features 1582 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1583 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1584 #endif 1585 // Classic/LE 1586 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1587 } 1588 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1589 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1590 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1591 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1592 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1593 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1594 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1595 } 1596 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1597 hci_stack->local_supported_commands[0] = 1598 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1599 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1600 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1601 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1602 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1603 } 1604 #ifdef ENABLE_CLASSIC 1605 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1606 if (packet[5] == 0){ 1607 hci_stack->synchronous_flow_control_enabled = 1; 1608 } 1609 } 1610 #endif 1611 break; 1612 1613 case HCI_EVENT_COMMAND_STATUS: 1614 // get num cmd packets - limit to 1 to reduce complexity 1615 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1616 break; 1617 1618 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1619 int offset = 3; 1620 for (i=0; i<packet[2];i++){ 1621 handle = little_endian_read_16(packet, offset); 1622 offset += 2; 1623 uint16_t num_packets = little_endian_read_16(packet, offset); 1624 offset += 2; 1625 1626 conn = hci_connection_for_handle(handle); 1627 if (!conn){ 1628 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1629 continue; 1630 } 1631 1632 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1633 #ifdef ENABLE_CLASSIC 1634 if (conn->num_sco_packets_sent >= num_packets){ 1635 conn->num_sco_packets_sent -= num_packets; 1636 } else { 1637 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1638 conn->num_sco_packets_sent = 0; 1639 } 1640 hci_notify_if_sco_can_send_now(); 1641 #endif 1642 } else { 1643 if (conn->num_acl_packets_sent >= num_packets){ 1644 conn->num_acl_packets_sent -= num_packets; 1645 } else { 1646 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1647 conn->num_acl_packets_sent = 0; 1648 } 1649 } 1650 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1651 } 1652 break; 1653 } 1654 1655 #ifdef ENABLE_CLASSIC 1656 case HCI_EVENT_CONNECTION_REQUEST: 1657 reverse_bd_addr(&packet[2], addr); 1658 // TODO: eval COD 8-10 1659 link_type = packet[11]; 1660 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1661 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1662 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1663 if (!conn) { 1664 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1665 } 1666 if (!conn) { 1667 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1668 hci_stack->decline_reason = 0x0d; 1669 bd_addr_copy(hci_stack->decline_addr, addr); 1670 break; 1671 } 1672 conn->role = HCI_ROLE_SLAVE; 1673 conn->state = RECEIVED_CONNECTION_REQUEST; 1674 // store info about eSCO 1675 if (link_type == 0x02){ 1676 conn->remote_supported_feature_eSCO = 1; 1677 } 1678 hci_run(); 1679 break; 1680 1681 case HCI_EVENT_CONNECTION_COMPLETE: 1682 // Connection management 1683 reverse_bd_addr(&packet[5], addr); 1684 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1685 addr_type = BD_ADDR_TYPE_CLASSIC; 1686 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1687 if (conn) { 1688 if (!packet[2]){ 1689 conn->state = OPEN; 1690 conn->con_handle = little_endian_read_16(packet, 3); 1691 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1692 1693 // restart timer 1694 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1695 btstack_run_loop_add_timer(&conn->timeout); 1696 1697 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1698 1699 hci_emit_nr_connections_changed(); 1700 } else { 1701 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1702 uint8_t status = packet[2]; 1703 bd_addr_t bd_address; 1704 memcpy(&bd_address, conn->address, 6); 1705 1706 // connection failed, remove entry 1707 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1708 btstack_memory_hci_connection_free( conn ); 1709 1710 // notify client if dedicated bonding 1711 if (notify_dedicated_bonding_failed){ 1712 log_info("hci notify_dedicated_bonding_failed"); 1713 hci_emit_dedicated_bonding_result(bd_address, status); 1714 } 1715 1716 // if authentication error, also delete link key 1717 if (packet[2] == 0x05) { 1718 gap_drop_link_key_for_bd_addr(addr); 1719 } 1720 } 1721 } 1722 break; 1723 1724 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1725 reverse_bd_addr(&packet[5], addr); 1726 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1727 if (packet[2]){ 1728 // connection failed 1729 break; 1730 } 1731 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1732 if (!conn) { 1733 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1734 } 1735 if (!conn) { 1736 break; 1737 } 1738 conn->state = OPEN; 1739 conn->con_handle = little_endian_read_16(packet, 3); 1740 break; 1741 1742 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1743 handle = little_endian_read_16(packet, 3); 1744 conn = hci_connection_for_handle(handle); 1745 if (!conn) break; 1746 if (!packet[2]){ 1747 uint8_t * features = &packet[5]; 1748 if (features[6] & (1 << 3)){ 1749 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1750 } 1751 if (features[3] & (1<<7)){ 1752 conn->remote_supported_feature_eSCO = 1; 1753 } 1754 } 1755 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1756 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1757 if (conn->bonding_flags & BONDING_DEDICATED){ 1758 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1759 } 1760 break; 1761 1762 case HCI_EVENT_LINK_KEY_REQUEST: 1763 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1764 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1765 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1766 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1767 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1768 hci_run(); 1769 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1770 return; 1771 1772 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1773 reverse_bd_addr(&packet[2], addr); 1774 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1775 if (!conn) break; 1776 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1777 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1778 // Change Connection Encryption keeps link key type 1779 if (link_key_type != CHANGED_COMBINATION_KEY){ 1780 conn->link_key_type = link_key_type; 1781 } 1782 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1783 // still forward event to allow dismiss of pairing dialog 1784 break; 1785 } 1786 1787 case HCI_EVENT_PIN_CODE_REQUEST: 1788 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1789 // non-bondable mode: pin code negative reply will be sent 1790 if (!hci_stack->bondable){ 1791 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1792 hci_run(); 1793 return; 1794 } 1795 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1796 if (!hci_stack->link_key_db) break; 1797 hci_event_pin_code_request_get_bd_addr(packet, addr); 1798 hci_stack->link_key_db->delete_link_key(addr); 1799 break; 1800 1801 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1802 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1803 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1804 break; 1805 1806 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1807 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1808 if (!hci_stack->ssp_auto_accept) break; 1809 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1810 break; 1811 1812 case HCI_EVENT_USER_PASSKEY_REQUEST: 1813 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1814 if (!hci_stack->ssp_auto_accept) break; 1815 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1816 break; 1817 #endif 1818 1819 case HCI_EVENT_ENCRYPTION_CHANGE: 1820 handle = little_endian_read_16(packet, 3); 1821 conn = hci_connection_for_handle(handle); 1822 if (!conn) break; 1823 if (packet[2] == 0) { 1824 if (packet[5]){ 1825 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1826 } else { 1827 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1828 } 1829 } 1830 #ifdef ENABLE_CLASSIC 1831 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1832 #endif 1833 break; 1834 1835 #ifdef ENABLE_CLASSIC 1836 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1837 handle = little_endian_read_16(packet, 3); 1838 conn = hci_connection_for_handle(handle); 1839 if (!conn) break; 1840 1841 // dedicated bonding: send result and disconnect 1842 if (conn->bonding_flags & BONDING_DEDICATED){ 1843 conn->bonding_flags &= ~BONDING_DEDICATED; 1844 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1845 conn->bonding_status = packet[2]; 1846 break; 1847 } 1848 1849 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1850 // link key sufficient for requested security 1851 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1852 break; 1853 } 1854 // not enough 1855 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1856 break; 1857 #endif 1858 1859 // HCI_EVENT_DISCONNECTION_COMPLETE 1860 // has been split, to first notify stack before shutting connection down 1861 // see end of function, too. 1862 case HCI_EVENT_DISCONNECTION_COMPLETE: 1863 if (packet[2]) break; // status != 0 1864 handle = little_endian_read_16(packet, 3); 1865 // drop outgoing ACL fragments if it is for closed connection 1866 if (hci_stack->acl_fragmentation_total_size > 0) { 1867 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1868 log_info("hci: drop fragmented ACL data for closed connection"); 1869 hci_stack->acl_fragmentation_total_size = 0; 1870 hci_stack->acl_fragmentation_pos = 0; 1871 } 1872 } 1873 1874 // re-enable advertisements for le connections if active 1875 conn = hci_connection_for_handle(handle); 1876 if (!conn) break; 1877 #ifdef ENABLE_BLE 1878 #ifdef ENABLE_LE_PERIPHERAL 1879 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1880 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1881 } 1882 #endif 1883 #endif 1884 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1885 break; 1886 1887 case HCI_EVENT_HARDWARE_ERROR: 1888 log_error("Hardware Error: 0x%02x", packet[2]); 1889 if (hci_stack->hardware_error_callback){ 1890 (*hci_stack->hardware_error_callback)(packet[2]); 1891 } else { 1892 // if no special requests, just reboot stack 1893 hci_power_control_off(); 1894 hci_power_control_on(); 1895 } 1896 break; 1897 1898 #ifdef ENABLE_CLASSIC 1899 case HCI_EVENT_ROLE_CHANGE: 1900 if (packet[2]) break; // status != 0 1901 handle = little_endian_read_16(packet, 3); 1902 conn = hci_connection_for_handle(handle); 1903 if (!conn) break; // no conn 1904 conn->role = packet[9]; 1905 break; 1906 #endif 1907 1908 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1909 // release packet buffer only for asynchronous transport and if there are not further fragements 1910 if (hci_transport_synchronous()) { 1911 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1912 return; // instead of break: to avoid re-entering hci_run() 1913 } 1914 if (hci_stack->acl_fragmentation_total_size) break; 1915 hci_release_packet_buffer(); 1916 1917 // L2CAP receives this event via the hci_emit_event below 1918 1919 #ifdef ENABLE_CLASSIC 1920 // For SCO, we do the can_send_now_check here 1921 hci_notify_if_sco_can_send_now(); 1922 #endif 1923 break; 1924 1925 #ifdef ENABLE_CLASSIC 1926 case HCI_EVENT_SCO_CAN_SEND_NOW: 1927 // For SCO, we do the can_send_now_check here 1928 hci_notify_if_sco_can_send_now(); 1929 return; 1930 #endif 1931 1932 #ifdef ENABLE_BLE 1933 case HCI_EVENT_LE_META: 1934 switch (packet[2]){ 1935 #ifdef ENABLE_LE_CENTRAL 1936 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1937 // log_info("advertising report received"); 1938 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1939 le_handle_advertisement_report(packet, size); 1940 break; 1941 #endif 1942 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1943 // Connection management 1944 reverse_bd_addr(&packet[8], addr); 1945 addr_type = (bd_addr_type_t)packet[7]; 1946 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1947 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1948 #ifdef ENABLE_LE_CENTRAL 1949 // if auto-connect, remove from whitelist in both roles 1950 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1951 hci_remove_from_whitelist(addr_type, addr); 1952 } 1953 // handle error: error is reported only to the initiator -> outgoing connection 1954 if (packet[3]){ 1955 // outgoing connection establishment is done 1956 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1957 // remove entry 1958 if (conn){ 1959 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1960 btstack_memory_hci_connection_free( conn ); 1961 } 1962 break; 1963 } 1964 #endif 1965 // on success, both hosts receive connection complete event 1966 if (packet[6] == HCI_ROLE_MASTER){ 1967 #ifdef ENABLE_LE_CENTRAL 1968 // if we're master, it was an outgoing connection and we're done with it 1969 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1970 #endif 1971 } else { 1972 #ifdef ENABLE_LE_PERIPHERAL 1973 // if we're slave, it was an incoming connection, advertisements have stopped 1974 hci_stack->le_advertisements_active = 0; 1975 // try to re-enable them 1976 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1977 #endif 1978 } 1979 // LE connections are auto-accepted, so just create a connection if there isn't one already 1980 if (!conn){ 1981 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1982 } 1983 // no memory, sorry. 1984 if (!conn){ 1985 break; 1986 } 1987 1988 conn->state = OPEN; 1989 conn->role = packet[6]; 1990 conn->con_handle = little_endian_read_16(packet, 4); 1991 1992 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1993 1994 // restart timer 1995 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1996 // btstack_run_loop_add_timer(&conn->timeout); 1997 1998 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1999 2000 hci_emit_nr_connections_changed(); 2001 break; 2002 2003 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2004 2005 default: 2006 break; 2007 } 2008 break; 2009 #endif 2010 default: 2011 break; 2012 } 2013 2014 // handle BT initialization 2015 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2016 hci_initializing_event_handler(packet, size); 2017 } 2018 2019 // help with BT sleep 2020 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2021 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2022 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2023 hci_initializing_next_state(); 2024 } 2025 2026 // notify upper stack 2027 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2028 2029 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2030 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2031 if (!packet[2]){ 2032 handle = little_endian_read_16(packet, 3); 2033 hci_connection_t * aConn = hci_connection_for_handle(handle); 2034 if (aConn) { 2035 uint8_t status = aConn->bonding_status; 2036 uint16_t flags = aConn->bonding_flags; 2037 bd_addr_t bd_address; 2038 memcpy(&bd_address, aConn->address, 6); 2039 hci_shutdown_connection(aConn); 2040 // connection struct is gone, don't access anymore 2041 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2042 hci_emit_dedicated_bonding_result(bd_address, status); 2043 } 2044 } 2045 } 2046 } 2047 2048 // execute main loop 2049 hci_run(); 2050 } 2051 2052 #ifdef ENABLE_CLASSIC 2053 static void sco_handler(uint8_t * packet, uint16_t size){ 2054 if (!hci_stack->sco_packet_handler) return; 2055 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2056 } 2057 #endif 2058 2059 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2060 hci_dump_packet(packet_type, 1, packet, size); 2061 switch (packet_type) { 2062 case HCI_EVENT_PACKET: 2063 event_handler(packet, size); 2064 break; 2065 case HCI_ACL_DATA_PACKET: 2066 acl_handler(packet, size); 2067 break; 2068 #ifdef ENABLE_CLASSIC 2069 case HCI_SCO_DATA_PACKET: 2070 sco_handler(packet, size); 2071 break; 2072 #endif 2073 default: 2074 break; 2075 } 2076 } 2077 2078 /** 2079 * @brief Add event packet handler. 2080 */ 2081 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2082 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2083 } 2084 2085 2086 /** Register HCI packet handlers */ 2087 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2088 hci_stack->acl_packet_handler = handler; 2089 } 2090 2091 #ifdef ENABLE_CLASSIC 2092 /** 2093 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2094 */ 2095 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2096 hci_stack->sco_packet_handler = handler; 2097 } 2098 #endif 2099 2100 static void hci_state_reset(void){ 2101 // no connections yet 2102 hci_stack->connections = NULL; 2103 2104 // keep discoverable/connectable as this has been requested by the client(s) 2105 // hci_stack->discoverable = 0; 2106 // hci_stack->connectable = 0; 2107 // hci_stack->bondable = 1; 2108 // hci_stack->own_addr_type = 0; 2109 2110 // buffer is free 2111 hci_stack->hci_packet_buffer_reserved = 0; 2112 2113 // no pending cmds 2114 hci_stack->decline_reason = 0; 2115 hci_stack->new_scan_enable_value = 0xff; 2116 2117 // LE 2118 #ifdef ENABLE_BLE 2119 memset(hci_stack->le_random_address, 0, 6); 2120 hci_stack->le_random_address_set = 0; 2121 #endif 2122 #ifdef ENABLE_LE_CENTRAL 2123 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2124 hci_stack->le_scan_type = 0xff; 2125 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2126 hci_stack->le_whitelist = 0; 2127 hci_stack->le_whitelist_capacity = 0; 2128 #endif 2129 2130 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2131 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2132 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2133 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2134 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2135 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2136 } 2137 2138 #ifdef ENABLE_CLASSIC 2139 /** 2140 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2141 */ 2142 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2143 // store and open remote device db 2144 hci_stack->link_key_db = link_key_db; 2145 if (hci_stack->link_key_db) { 2146 hci_stack->link_key_db->open(); 2147 } 2148 } 2149 #endif 2150 2151 void hci_init(const hci_transport_t *transport, const void *config){ 2152 2153 #ifdef HAVE_MALLOC 2154 if (!hci_stack) { 2155 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2156 } 2157 #else 2158 hci_stack = &hci_stack_static; 2159 #endif 2160 memset(hci_stack, 0, sizeof(hci_stack_t)); 2161 2162 // reference to use transport layer implementation 2163 hci_stack->hci_transport = transport; 2164 2165 // reference to used config 2166 hci_stack->config = config; 2167 2168 // setup pointer for outgoing packet buffer 2169 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2170 2171 // max acl payload size defined in config.h 2172 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2173 2174 // register packet handlers with transport 2175 transport->register_packet_handler(&packet_handler); 2176 2177 hci_stack->state = HCI_STATE_OFF; 2178 2179 // class of device 2180 hci_stack->class_of_device = 0x007a020c; // Smartphone 2181 2182 // bondable by default 2183 hci_stack->bondable = 1; 2184 2185 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2186 hci_stack->ssp_enable = 1; 2187 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2188 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2189 hci_stack->ssp_auto_accept = 1; 2190 2191 // voice setting - signed 8 bit pcm data with CVSD over the air 2192 hci_stack->sco_voice_setting = 0x40; 2193 2194 hci_state_reset(); 2195 } 2196 2197 /** 2198 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2199 */ 2200 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2201 hci_stack->chipset = chipset_driver; 2202 2203 // reset chipset driver - init is also called on power_up 2204 if (hci_stack->chipset && hci_stack->chipset->init){ 2205 hci_stack->chipset->init(hci_stack->config); 2206 } 2207 } 2208 2209 /** 2210 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2211 */ 2212 void hci_set_control(const btstack_control_t *hardware_control){ 2213 // references to used control implementation 2214 hci_stack->control = hardware_control; 2215 // init with transport config 2216 hardware_control->init(hci_stack->config); 2217 } 2218 2219 void hci_close(void){ 2220 // close remote device db 2221 if (hci_stack->link_key_db) { 2222 hci_stack->link_key_db->close(); 2223 } 2224 2225 btstack_linked_list_iterator_t lit; 2226 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2227 while (btstack_linked_list_iterator_has_next(&lit)){ 2228 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2229 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2230 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2231 hci_shutdown_connection(connection); 2232 } 2233 2234 hci_power_control(HCI_POWER_OFF); 2235 2236 #ifdef HAVE_MALLOC 2237 free(hci_stack); 2238 #endif 2239 hci_stack = NULL; 2240 } 2241 2242 #ifdef ENABLE_CLASSIC 2243 void gap_set_class_of_device(uint32_t class_of_device){ 2244 hci_stack->class_of_device = class_of_device; 2245 } 2246 2247 void hci_disable_l2cap_timeout_check(void){ 2248 disable_l2cap_timeouts = 1; 2249 } 2250 #endif 2251 2252 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2253 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2254 void hci_set_bd_addr(bd_addr_t addr){ 2255 memcpy(hci_stack->custom_bd_addr, addr, 6); 2256 hci_stack->custom_bd_addr_set = 1; 2257 } 2258 #endif 2259 2260 // State-Module-Driver overview 2261 // state module low-level 2262 // HCI_STATE_OFF off close 2263 // HCI_STATE_INITIALIZING, on open 2264 // HCI_STATE_WORKING, on open 2265 // HCI_STATE_HALTING, on open 2266 // HCI_STATE_SLEEPING, off/sleep close 2267 // HCI_STATE_FALLING_ASLEEP on open 2268 2269 static int hci_power_control_on(void){ 2270 2271 // power on 2272 int err = 0; 2273 if (hci_stack->control && hci_stack->control->on){ 2274 err = (*hci_stack->control->on)(); 2275 } 2276 if (err){ 2277 log_error( "POWER_ON failed"); 2278 hci_emit_hci_open_failed(); 2279 return err; 2280 } 2281 2282 // int chipset driver 2283 if (hci_stack->chipset && hci_stack->chipset->init){ 2284 hci_stack->chipset->init(hci_stack->config); 2285 } 2286 2287 // init transport 2288 if (hci_stack->hci_transport->init){ 2289 hci_stack->hci_transport->init(hci_stack->config); 2290 } 2291 2292 // open transport 2293 err = hci_stack->hci_transport->open(); 2294 if (err){ 2295 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2296 if (hci_stack->control && hci_stack->control->off){ 2297 (*hci_stack->control->off)(); 2298 } 2299 hci_emit_hci_open_failed(); 2300 return err; 2301 } 2302 return 0; 2303 } 2304 2305 static void hci_power_control_off(void){ 2306 2307 log_info("hci_power_control_off"); 2308 2309 // close low-level device 2310 hci_stack->hci_transport->close(); 2311 2312 log_info("hci_power_control_off - hci_transport closed"); 2313 2314 // power off 2315 if (hci_stack->control && hci_stack->control->off){ 2316 (*hci_stack->control->off)(); 2317 } 2318 2319 log_info("hci_power_control_off - control closed"); 2320 2321 hci_stack->state = HCI_STATE_OFF; 2322 } 2323 2324 static void hci_power_control_sleep(void){ 2325 2326 log_info("hci_power_control_sleep"); 2327 2328 #if 0 2329 // don't close serial port during sleep 2330 2331 // close low-level device 2332 hci_stack->hci_transport->close(hci_stack->config); 2333 #endif 2334 2335 // sleep mode 2336 if (hci_stack->control && hci_stack->control->sleep){ 2337 (*hci_stack->control->sleep)(); 2338 } 2339 2340 hci_stack->state = HCI_STATE_SLEEPING; 2341 } 2342 2343 static int hci_power_control_wake(void){ 2344 2345 log_info("hci_power_control_wake"); 2346 2347 // wake on 2348 if (hci_stack->control && hci_stack->control->wake){ 2349 (*hci_stack->control->wake)(); 2350 } 2351 2352 #if 0 2353 // open low-level device 2354 int err = hci_stack->hci_transport->open(hci_stack->config); 2355 if (err){ 2356 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2357 if (hci_stack->control && hci_stack->control->off){ 2358 (*hci_stack->control->off)(); 2359 } 2360 hci_emit_hci_open_failed(); 2361 return err; 2362 } 2363 #endif 2364 2365 return 0; 2366 } 2367 2368 static void hci_power_transition_to_initializing(void){ 2369 // set up state machine 2370 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2371 hci_stack->hci_packet_buffer_reserved = 0; 2372 hci_stack->state = HCI_STATE_INITIALIZING; 2373 hci_stack->substate = HCI_INIT_SEND_RESET; 2374 } 2375 2376 int hci_power_control(HCI_POWER_MODE power_mode){ 2377 2378 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2379 2380 int err = 0; 2381 switch (hci_stack->state){ 2382 2383 case HCI_STATE_OFF: 2384 switch (power_mode){ 2385 case HCI_POWER_ON: 2386 err = hci_power_control_on(); 2387 if (err) { 2388 log_error("hci_power_control_on() error %d", err); 2389 return err; 2390 } 2391 hci_power_transition_to_initializing(); 2392 break; 2393 case HCI_POWER_OFF: 2394 // do nothing 2395 break; 2396 case HCI_POWER_SLEEP: 2397 // do nothing (with SLEEP == OFF) 2398 break; 2399 } 2400 break; 2401 2402 case HCI_STATE_INITIALIZING: 2403 switch (power_mode){ 2404 case HCI_POWER_ON: 2405 // do nothing 2406 break; 2407 case HCI_POWER_OFF: 2408 // no connections yet, just turn it off 2409 hci_power_control_off(); 2410 break; 2411 case HCI_POWER_SLEEP: 2412 // no connections yet, just turn it off 2413 hci_power_control_sleep(); 2414 break; 2415 } 2416 break; 2417 2418 case HCI_STATE_WORKING: 2419 switch (power_mode){ 2420 case HCI_POWER_ON: 2421 // do nothing 2422 break; 2423 case HCI_POWER_OFF: 2424 // see hci_run 2425 hci_stack->state = HCI_STATE_HALTING; 2426 break; 2427 case HCI_POWER_SLEEP: 2428 // see hci_run 2429 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2430 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2431 break; 2432 } 2433 break; 2434 2435 case HCI_STATE_HALTING: 2436 switch (power_mode){ 2437 case HCI_POWER_ON: 2438 hci_power_transition_to_initializing(); 2439 break; 2440 case HCI_POWER_OFF: 2441 // do nothing 2442 break; 2443 case HCI_POWER_SLEEP: 2444 // see hci_run 2445 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2446 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2447 break; 2448 } 2449 break; 2450 2451 case HCI_STATE_FALLING_ASLEEP: 2452 switch (power_mode){ 2453 case HCI_POWER_ON: 2454 2455 #ifdef HAVE_PLATFORM_IPHONE_OS 2456 // nothing to do, if H4 supports power management 2457 if (btstack_control_iphone_power_management_enabled()){ 2458 hci_stack->state = HCI_STATE_INITIALIZING; 2459 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2460 break; 2461 } 2462 #endif 2463 hci_power_transition_to_initializing(); 2464 break; 2465 case HCI_POWER_OFF: 2466 // see hci_run 2467 hci_stack->state = HCI_STATE_HALTING; 2468 break; 2469 case HCI_POWER_SLEEP: 2470 // do nothing 2471 break; 2472 } 2473 break; 2474 2475 case HCI_STATE_SLEEPING: 2476 switch (power_mode){ 2477 case HCI_POWER_ON: 2478 2479 #ifdef HAVE_PLATFORM_IPHONE_OS 2480 // nothing to do, if H4 supports power management 2481 if (btstack_control_iphone_power_management_enabled()){ 2482 hci_stack->state = HCI_STATE_INITIALIZING; 2483 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2484 hci_update_scan_enable(); 2485 break; 2486 } 2487 #endif 2488 err = hci_power_control_wake(); 2489 if (err) return err; 2490 hci_power_transition_to_initializing(); 2491 break; 2492 case HCI_POWER_OFF: 2493 hci_stack->state = HCI_STATE_HALTING; 2494 break; 2495 case HCI_POWER_SLEEP: 2496 // do nothing 2497 break; 2498 } 2499 break; 2500 } 2501 2502 // create internal event 2503 hci_emit_state(); 2504 2505 // trigger next/first action 2506 hci_run(); 2507 2508 return 0; 2509 } 2510 2511 2512 #ifdef ENABLE_CLASSIC 2513 2514 static void hci_update_scan_enable(void){ 2515 // 2 = page scan, 1 = inq scan 2516 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2517 hci_run(); 2518 } 2519 2520 void gap_discoverable_control(uint8_t enable){ 2521 if (enable) enable = 1; // normalize argument 2522 2523 if (hci_stack->discoverable == enable){ 2524 hci_emit_discoverable_enabled(hci_stack->discoverable); 2525 return; 2526 } 2527 2528 hci_stack->discoverable = enable; 2529 hci_update_scan_enable(); 2530 } 2531 2532 void gap_connectable_control(uint8_t enable){ 2533 if (enable) enable = 1; // normalize argument 2534 2535 // don't emit event 2536 if (hci_stack->connectable == enable) return; 2537 2538 hci_stack->connectable = enable; 2539 hci_update_scan_enable(); 2540 } 2541 #endif 2542 2543 void gap_local_bd_addr(bd_addr_t address_buffer){ 2544 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2545 } 2546 2547 static void hci_run(void){ 2548 2549 // log_info("hci_run: entered"); 2550 btstack_linked_item_t * it; 2551 2552 // send continuation fragments first, as they block the prepared packet buffer 2553 if (hci_stack->acl_fragmentation_total_size > 0) { 2554 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2555 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2556 if (connection) { 2557 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2558 hci_send_acl_packet_fragments(connection); 2559 return; 2560 } 2561 } else { 2562 // connection gone -> discard further fragments 2563 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2564 hci_stack->acl_fragmentation_total_size = 0; 2565 hci_stack->acl_fragmentation_pos = 0; 2566 } 2567 } 2568 2569 if (!hci_can_send_command_packet_now()) return; 2570 2571 // global/non-connection oriented commands 2572 2573 #ifdef ENABLE_CLASSIC 2574 // decline incoming connections 2575 if (hci_stack->decline_reason){ 2576 uint8_t reason = hci_stack->decline_reason; 2577 hci_stack->decline_reason = 0; 2578 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2579 return; 2580 } 2581 2582 // send scan enable 2583 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2584 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2585 hci_stack->new_scan_enable_value = 0xff; 2586 return; 2587 } 2588 #endif 2589 2590 #ifdef ENABLE_BLE 2591 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2592 if ((hci_stack->state == HCI_STATE_WORKING) 2593 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2594 2595 #ifdef ENABLE_LE_CENTRAL 2596 // handle le scan 2597 switch(hci_stack->le_scanning_state){ 2598 case LE_START_SCAN: 2599 hci_stack->le_scanning_state = LE_SCANNING; 2600 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2601 return; 2602 2603 case LE_STOP_SCAN: 2604 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2605 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2606 return; 2607 default: 2608 break; 2609 } 2610 if (hci_stack->le_scan_type != 0xff){ 2611 // defaults: active scanning, accept all advertisement packets 2612 int scan_type = hci_stack->le_scan_type; 2613 hci_stack->le_scan_type = 0xff; 2614 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); 2615 return; 2616 } 2617 #endif 2618 #ifdef ENABLE_LE_PERIPHERAL 2619 // le advertisement control 2620 if (hci_stack->le_advertisements_todo){ 2621 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2622 } 2623 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2624 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2625 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2626 return; 2627 } 2628 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2629 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2630 hci_send_cmd(&hci_le_set_advertising_parameters, 2631 hci_stack->le_advertisements_interval_min, 2632 hci_stack->le_advertisements_interval_max, 2633 hci_stack->le_advertisements_type, 2634 hci_stack->le_own_addr_type, 2635 hci_stack->le_advertisements_direct_address_type, 2636 hci_stack->le_advertisements_direct_address, 2637 hci_stack->le_advertisements_channel_map, 2638 hci_stack->le_advertisements_filter_policy); 2639 return; 2640 } 2641 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2642 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2643 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2644 return; 2645 } 2646 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2647 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2648 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2649 hci_stack->le_scan_response_data); 2650 return; 2651 } 2652 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2653 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2654 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2655 return; 2656 } 2657 #endif 2658 2659 #ifdef ENABLE_LE_CENTRAL 2660 // 2661 // LE Whitelist Management 2662 // 2663 2664 // check if whitelist needs modification 2665 btstack_linked_list_iterator_t lit; 2666 int modification_pending = 0; 2667 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2668 while (btstack_linked_list_iterator_has_next(&lit)){ 2669 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2670 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2671 modification_pending = 1; 2672 break; 2673 } 2674 } 2675 2676 if (modification_pending){ 2677 // stop connnecting if modification pending 2678 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2679 hci_send_cmd(&hci_le_create_connection_cancel); 2680 return; 2681 } 2682 2683 // add/remove entries 2684 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2685 while (btstack_linked_list_iterator_has_next(&lit)){ 2686 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2687 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2688 entry->state = LE_WHITELIST_ON_CONTROLLER; 2689 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2690 return; 2691 2692 } 2693 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2694 bd_addr_t address; 2695 bd_addr_type_t address_type = entry->address_type; 2696 memcpy(address, entry->address, 6); 2697 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2698 btstack_memory_whitelist_entry_free(entry); 2699 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2700 return; 2701 } 2702 } 2703 } 2704 2705 // start connecting 2706 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2707 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2708 bd_addr_t null_addr; 2709 memset(null_addr, 0, 6); 2710 hci_send_cmd(&hci_le_create_connection, 2711 0x0060, // scan interval: 60 ms 2712 0x0030, // scan interval: 30 ms 2713 1, // use whitelist 2714 0, // peer address type 2715 null_addr, // peer bd addr 2716 hci_stack->le_own_addr_type, // our addr type: 2717 0x0008, // conn interval min 2718 0x0018, // conn interval max 2719 0, // conn latency 2720 0x0048, // supervision timeout 2721 0x0001, // min ce length 2722 0x0001 // max ce length 2723 ); 2724 return; 2725 } 2726 #endif 2727 } 2728 #endif 2729 2730 // send pending HCI commands 2731 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2732 hci_connection_t * connection = (hci_connection_t *) it; 2733 2734 switch(connection->state){ 2735 case SEND_CREATE_CONNECTION: 2736 switch(connection->address_type){ 2737 #ifdef ENABLE_CLASSIC 2738 case BD_ADDR_TYPE_CLASSIC: 2739 log_info("sending hci_create_connection"); 2740 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2741 break; 2742 #endif 2743 default: 2744 #ifdef ENABLE_BLE 2745 #ifdef ENABLE_LE_CENTRAL 2746 log_info("sending hci_le_create_connection"); 2747 hci_send_cmd(&hci_le_create_connection, 2748 0x0060, // scan interval: 60 ms 2749 0x0030, // scan interval: 30 ms 2750 0, // don't use whitelist 2751 connection->address_type, // peer address type 2752 connection->address, // peer bd addr 2753 hci_stack->le_own_addr_type, // our addr type: 2754 0x0008, // conn interval min 2755 0x0018, // conn interval max 2756 0, // conn latency 2757 0x0048, // supervision timeout 2758 0x0001, // min ce length 2759 0x0001 // max ce length 2760 ); 2761 2762 connection->state = SENT_CREATE_CONNECTION; 2763 #endif 2764 #endif 2765 break; 2766 } 2767 return; 2768 2769 #ifdef ENABLE_CLASSIC 2770 case RECEIVED_CONNECTION_REQUEST: 2771 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2772 connection->state = ACCEPTED_CONNECTION_REQUEST; 2773 connection->role = HCI_ROLE_SLAVE; 2774 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2775 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2776 } 2777 return; 2778 #endif 2779 2780 #ifdef ENABLE_BLE 2781 #ifdef ENABLE_LE_CENTRAL 2782 case SEND_CANCEL_CONNECTION: 2783 connection->state = SENT_CANCEL_CONNECTION; 2784 hci_send_cmd(&hci_le_create_connection_cancel); 2785 return; 2786 #endif 2787 #endif 2788 case SEND_DISCONNECT: 2789 connection->state = SENT_DISCONNECT; 2790 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2791 return; 2792 2793 default: 2794 break; 2795 } 2796 2797 #ifdef ENABLE_CLASSIC 2798 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2799 log_info("responding to link key request"); 2800 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2801 link_key_t link_key; 2802 link_key_type_t link_key_type; 2803 if ( hci_stack->link_key_db 2804 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2805 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2806 connection->link_key_type = link_key_type; 2807 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2808 } else { 2809 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2810 } 2811 return; 2812 } 2813 2814 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2815 log_info("denying to pin request"); 2816 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2817 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2818 return; 2819 } 2820 2821 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2822 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2823 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2824 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2825 // tweak authentication requirements 2826 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2827 if (connection->bonding_flags & BONDING_DEDICATED){ 2828 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2829 } 2830 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2831 authreq |= 1; 2832 } 2833 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2834 } else { 2835 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2836 } 2837 return; 2838 } 2839 2840 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2841 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2842 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2843 return; 2844 } 2845 2846 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2847 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2848 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2849 return; 2850 } 2851 2852 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2853 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2854 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2855 return; 2856 } 2857 2858 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2859 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2860 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2861 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2862 return; 2863 } 2864 2865 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2866 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2867 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2868 return; 2869 } 2870 2871 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2872 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2873 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2874 return; 2875 } 2876 #endif 2877 2878 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2879 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2880 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2881 return; 2882 } 2883 2884 #ifdef ENABLE_BLE 2885 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2886 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2887 2888 uint16_t connection_interval_min = connection->le_conn_interval_min; 2889 connection->le_conn_interval_min = 0; 2890 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2891 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2892 0x0000, 0xffff); 2893 } 2894 #endif 2895 } 2896 2897 hci_connection_t * connection; 2898 switch (hci_stack->state){ 2899 case HCI_STATE_INITIALIZING: 2900 hci_initializing_run(); 2901 break; 2902 2903 case HCI_STATE_HALTING: 2904 2905 log_info("HCI_STATE_HALTING"); 2906 2907 // free whitelist entries 2908 #ifdef ENABLE_BLE 2909 #ifdef ENABLE_LE_CENTRAL 2910 { 2911 btstack_linked_list_iterator_t lit; 2912 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2913 while (btstack_linked_list_iterator_has_next(&lit)){ 2914 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2915 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2916 btstack_memory_whitelist_entry_free(entry); 2917 } 2918 } 2919 #endif 2920 #endif 2921 // close all open connections 2922 connection = (hci_connection_t *) hci_stack->connections; 2923 if (connection){ 2924 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2925 if (!hci_can_send_command_packet_now()) return; 2926 2927 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2928 2929 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2930 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2931 2932 // ... which would be ignored anyway as we shutdown (free) the connection now 2933 hci_shutdown_connection(connection); 2934 2935 // finally, send the disconnect command 2936 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2937 return; 2938 } 2939 log_info("HCI_STATE_HALTING, calling off"); 2940 2941 // switch mode 2942 hci_power_control_off(); 2943 2944 log_info("HCI_STATE_HALTING, emitting state"); 2945 hci_emit_state(); 2946 log_info("HCI_STATE_HALTING, done"); 2947 break; 2948 2949 case HCI_STATE_FALLING_ASLEEP: 2950 switch(hci_stack->substate) { 2951 case HCI_FALLING_ASLEEP_DISCONNECT: 2952 log_info("HCI_STATE_FALLING_ASLEEP"); 2953 // close all open connections 2954 connection = (hci_connection_t *) hci_stack->connections; 2955 2956 #ifdef HAVE_PLATFORM_IPHONE_OS 2957 // don't close connections, if H4 supports power management 2958 if (btstack_control_iphone_power_management_enabled()){ 2959 connection = NULL; 2960 } 2961 #endif 2962 if (connection){ 2963 2964 // send disconnect 2965 if (!hci_can_send_command_packet_now()) return; 2966 2967 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2968 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2969 2970 // send disconnected event right away - causes higher layer connections to get closed, too. 2971 hci_shutdown_connection(connection); 2972 return; 2973 } 2974 2975 if (hci_classic_supported()){ 2976 // disable page and inquiry scan 2977 if (!hci_can_send_command_packet_now()) return; 2978 2979 log_info("HCI_STATE_HALTING, disabling inq scans"); 2980 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2981 2982 // continue in next sub state 2983 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2984 break; 2985 } 2986 // no break - fall through for ble-only chips 2987 2988 case HCI_FALLING_ASLEEP_COMPLETE: 2989 log_info("HCI_STATE_HALTING, calling sleep"); 2990 #ifdef HAVE_PLATFORM_IPHONE_OS 2991 // don't actually go to sleep, if H4 supports power management 2992 if (btstack_control_iphone_power_management_enabled()){ 2993 // SLEEP MODE reached 2994 hci_stack->state = HCI_STATE_SLEEPING; 2995 hci_emit_state(); 2996 break; 2997 } 2998 #endif 2999 // switch mode 3000 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3001 hci_emit_state(); 3002 break; 3003 3004 default: 3005 break; 3006 } 3007 break; 3008 3009 default: 3010 break; 3011 } 3012 } 3013 3014 int hci_send_cmd_packet(uint8_t *packet, int size){ 3015 // house-keeping 3016 3017 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3018 hci_stack->loopback_mode = packet[3]; 3019 } 3020 3021 #ifdef ENABLE_CLASSIC 3022 bd_addr_t addr; 3023 hci_connection_t * conn; 3024 3025 // create_connection? 3026 if (IS_COMMAND(packet, hci_create_connection)){ 3027 reverse_bd_addr(&packet[3], addr); 3028 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3029 3030 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3031 if (!conn){ 3032 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3033 if (!conn){ 3034 // notify client that alloc failed 3035 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3036 return 0; // don't sent packet to controller 3037 } 3038 conn->state = SEND_CREATE_CONNECTION; 3039 } 3040 log_info("conn state %u", conn->state); 3041 switch (conn->state){ 3042 // if connection active exists 3043 case OPEN: 3044 // and OPEN, emit connection complete command, don't send to controller 3045 hci_emit_connection_complete(addr, conn->con_handle, 0); 3046 return 0; 3047 case SEND_CREATE_CONNECTION: 3048 // connection created by hci, e.g. dedicated bonding 3049 break; 3050 default: 3051 // otherwise, just ignore as it is already in the open process 3052 return 0; 3053 } 3054 conn->state = SENT_CREATE_CONNECTION; 3055 } 3056 3057 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3058 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3059 } 3060 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3061 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3062 } 3063 3064 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3065 if (hci_stack->link_key_db){ 3066 reverse_bd_addr(&packet[3], addr); 3067 hci_stack->link_key_db->delete_link_key(addr); 3068 } 3069 } 3070 3071 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3072 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3073 reverse_bd_addr(&packet[3], addr); 3074 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3075 if (conn){ 3076 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3077 } 3078 } 3079 3080 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3081 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3082 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3083 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3084 reverse_bd_addr(&packet[3], addr); 3085 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3086 if (conn){ 3087 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3088 } 3089 } 3090 #endif 3091 3092 #ifdef ENABLE_BLE 3093 #ifdef ENABLE_LE_PERIPHERAL 3094 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3095 hci_stack->le_random_address_set = 1; 3096 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3097 } 3098 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3099 hci_stack->le_advertisements_active = packet[3]; 3100 } 3101 #endif 3102 #ifdef ENABLE_LE_CENTRAL 3103 if (IS_COMMAND(packet, hci_le_create_connection)){ 3104 // white list used? 3105 uint8_t initiator_filter_policy = packet[7]; 3106 switch (initiator_filter_policy){ 3107 case 0: 3108 // whitelist not used 3109 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3110 break; 3111 case 1: 3112 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3113 break; 3114 default: 3115 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3116 break; 3117 } 3118 } 3119 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3120 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3121 } 3122 #endif 3123 #endif 3124 3125 hci_stack->num_cmd_packets--; 3126 3127 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3128 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3129 3130 // release packet buffer for synchronous transport implementations 3131 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3132 hci_stack->hci_packet_buffer_reserved = 0; 3133 } 3134 3135 return err; 3136 } 3137 3138 // disconnect because of security block 3139 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3140 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3141 if (!connection) return; 3142 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3143 } 3144 3145 3146 // Configure Secure Simple Pairing 3147 3148 #ifdef ENABLE_CLASSIC 3149 3150 // enable will enable SSP during init 3151 void gap_ssp_set_enable(int enable){ 3152 hci_stack->ssp_enable = enable; 3153 } 3154 3155 static int hci_local_ssp_activated(void){ 3156 return gap_ssp_supported() && hci_stack->ssp_enable; 3157 } 3158 3159 // if set, BTstack will respond to io capability request using authentication requirement 3160 void gap_ssp_set_io_capability(int io_capability){ 3161 hci_stack->ssp_io_capability = io_capability; 3162 } 3163 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3164 hci_stack->ssp_authentication_requirement = authentication_requirement; 3165 } 3166 3167 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3168 void gap_ssp_set_auto_accept(int auto_accept){ 3169 hci_stack->ssp_auto_accept = auto_accept; 3170 } 3171 #endif 3172 3173 // va_list part of hci_send_cmd 3174 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3175 if (!hci_can_send_command_packet_now()){ 3176 log_error("hci_send_cmd called but cannot send packet now"); 3177 return 0; 3178 } 3179 3180 // for HCI INITIALIZATION 3181 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3182 hci_stack->last_cmd_opcode = cmd->opcode; 3183 3184 hci_reserve_packet_buffer(); 3185 uint8_t * packet = hci_stack->hci_packet_buffer; 3186 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3187 return hci_send_cmd_packet(packet, size); 3188 } 3189 3190 /** 3191 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3192 */ 3193 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3194 va_list argptr; 3195 va_start(argptr, cmd); 3196 int res = hci_send_cmd_va_arg(cmd, argptr); 3197 va_end(argptr); 3198 return res; 3199 } 3200 3201 // Create various non-HCI events. 3202 // TODO: generalize, use table similar to hci_create_command 3203 3204 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3205 // dump packet 3206 if (dump) { 3207 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3208 } 3209 3210 // dispatch to all event handlers 3211 btstack_linked_list_iterator_t it; 3212 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3213 while (btstack_linked_list_iterator_has_next(&it)){ 3214 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3215 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3216 } 3217 } 3218 3219 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3220 if (!hci_stack->acl_packet_handler) return; 3221 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3222 } 3223 3224 #ifdef ENABLE_CLASSIC 3225 static void hci_notify_if_sco_can_send_now(void){ 3226 // notify SCO sender if waiting 3227 if (!hci_stack->sco_waiting_for_can_send_now) return; 3228 if (hci_can_send_sco_packet_now()){ 3229 hci_stack->sco_waiting_for_can_send_now = 0; 3230 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3231 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3232 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3233 } 3234 } 3235 #endif 3236 3237 void hci_emit_state(void){ 3238 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3239 uint8_t event[3]; 3240 event[0] = BTSTACK_EVENT_STATE; 3241 event[1] = sizeof(event) - 2; 3242 event[2] = hci_stack->state; 3243 hci_emit_event(event, sizeof(event), 1); 3244 } 3245 3246 #ifdef ENABLE_CLASSIC 3247 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3248 uint8_t event[13]; 3249 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3250 event[1] = sizeof(event) - 2; 3251 event[2] = status; 3252 little_endian_store_16(event, 3, con_handle); 3253 reverse_bd_addr(address, &event[5]); 3254 event[11] = 1; // ACL connection 3255 event[12] = 0; // encryption disabled 3256 hci_emit_event(event, sizeof(event), 1); 3257 } 3258 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3259 if (disable_l2cap_timeouts) return; 3260 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3261 uint8_t event[4]; 3262 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3263 event[1] = sizeof(event) - 2; 3264 little_endian_store_16(event, 2, conn->con_handle); 3265 hci_emit_event(event, sizeof(event), 1); 3266 } 3267 #endif 3268 3269 #ifdef ENABLE_BLE 3270 #ifdef ENABLE_LE_CENTRAL 3271 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3272 uint8_t event[21]; 3273 event[0] = HCI_EVENT_LE_META; 3274 event[1] = sizeof(event) - 2; 3275 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3276 event[3] = status; 3277 little_endian_store_16(event, 4, con_handle); 3278 event[6] = 0; // TODO: role 3279 event[7] = address_type; 3280 reverse_bd_addr(address, &event[8]); 3281 little_endian_store_16(event, 14, 0); // interval 3282 little_endian_store_16(event, 16, 0); // latency 3283 little_endian_store_16(event, 18, 0); // supervision timeout 3284 event[20] = 0; // master clock accuracy 3285 hci_emit_event(event, sizeof(event), 1); 3286 } 3287 #endif 3288 #endif 3289 3290 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3291 uint8_t event[6]; 3292 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3293 event[1] = sizeof(event) - 2; 3294 event[2] = 0; // status = OK 3295 little_endian_store_16(event, 3, con_handle); 3296 event[5] = reason; 3297 hci_emit_event(event, sizeof(event), 1); 3298 } 3299 3300 static void hci_emit_nr_connections_changed(void){ 3301 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3302 uint8_t event[3]; 3303 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3304 event[1] = sizeof(event) - 2; 3305 event[2] = nr_hci_connections(); 3306 hci_emit_event(event, sizeof(event), 1); 3307 } 3308 3309 static void hci_emit_hci_open_failed(void){ 3310 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3311 uint8_t event[2]; 3312 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3313 event[1] = sizeof(event) - 2; 3314 hci_emit_event(event, sizeof(event), 1); 3315 } 3316 3317 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3318 log_info("hci_emit_dedicated_bonding_result %u ", status); 3319 uint8_t event[9]; 3320 int pos = 0; 3321 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3322 event[pos++] = sizeof(event) - 2; 3323 event[pos++] = status; 3324 reverse_bd_addr(address, &event[pos]); 3325 hci_emit_event(event, sizeof(event), 1); 3326 } 3327 3328 3329 #ifdef ENABLE_CLASSIC 3330 3331 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3332 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3333 uint8_t event[5]; 3334 int pos = 0; 3335 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3336 event[pos++] = sizeof(event) - 2; 3337 little_endian_store_16(event, 2, con_handle); 3338 pos += 2; 3339 event[pos++] = level; 3340 hci_emit_event(event, sizeof(event), 1); 3341 } 3342 3343 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3344 if (!connection) return LEVEL_0; 3345 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3346 return gap_security_level_for_link_key_type(connection->link_key_type); 3347 } 3348 3349 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3350 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3351 uint8_t event[3]; 3352 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3353 event[1] = sizeof(event) - 2; 3354 event[2] = enabled; 3355 hci_emit_event(event, sizeof(event), 1); 3356 } 3357 3358 #ifdef ENABLE_CLASSIC 3359 // query if remote side supports eSCO 3360 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3361 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3362 if (!connection) return 0; 3363 return connection->remote_supported_feature_eSCO; 3364 } 3365 3366 // query if remote side supports SSP 3367 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3368 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3369 if (!connection) return 0; 3370 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3371 } 3372 3373 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3374 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3375 } 3376 #endif 3377 3378 // GAP API 3379 /** 3380 * @bbrief enable/disable bonding. default is enabled 3381 * @praram enabled 3382 */ 3383 void gap_set_bondable_mode(int enable){ 3384 hci_stack->bondable = enable ? 1 : 0; 3385 } 3386 /** 3387 * @brief Get bondable mode. 3388 * @return 1 if bondable 3389 */ 3390 int gap_get_bondable_mode(void){ 3391 return hci_stack->bondable; 3392 } 3393 3394 /** 3395 * @brief map link keys to security levels 3396 */ 3397 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3398 switch (link_key_type){ 3399 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3400 return LEVEL_4; 3401 case COMBINATION_KEY: 3402 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3403 return LEVEL_3; 3404 default: 3405 return LEVEL_2; 3406 } 3407 } 3408 3409 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3410 log_info("gap_mitm_protection_required_for_security_level %u", level); 3411 return level > LEVEL_2; 3412 } 3413 3414 /** 3415 * @brief get current security level 3416 */ 3417 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3418 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3419 if (!connection) return LEVEL_0; 3420 return gap_security_level_for_connection(connection); 3421 } 3422 3423 /** 3424 * @brief request connection to device to 3425 * @result GAP_AUTHENTICATION_RESULT 3426 */ 3427 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3428 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3429 if (!connection){ 3430 hci_emit_security_level(con_handle, LEVEL_0); 3431 return; 3432 } 3433 gap_security_level_t current_level = gap_security_level(con_handle); 3434 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3435 if (current_level >= requested_level){ 3436 hci_emit_security_level(con_handle, current_level); 3437 return; 3438 } 3439 3440 connection->requested_security_level = requested_level; 3441 3442 #if 0 3443 // sending encryption request without a link key results in an error. 3444 // TODO: figure out how to use it properly 3445 3446 // would enabling ecnryption suffice (>= LEVEL_2)? 3447 if (hci_stack->link_key_db){ 3448 link_key_type_t link_key_type; 3449 link_key_t link_key; 3450 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3451 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3452 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3453 return; 3454 } 3455 } 3456 } 3457 #endif 3458 3459 // try to authenticate connection 3460 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3461 hci_run(); 3462 } 3463 3464 /** 3465 * @brief start dedicated bonding with device. disconnect after bonding 3466 * @param device 3467 * @param request MITM protection 3468 * @result GAP_DEDICATED_BONDING_COMPLETE 3469 */ 3470 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3471 3472 // create connection state machine 3473 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3474 3475 if (!connection){ 3476 return BTSTACK_MEMORY_ALLOC_FAILED; 3477 } 3478 3479 // delete linkn key 3480 gap_drop_link_key_for_bd_addr(device); 3481 3482 // configure LEVEL_2/3, dedicated bonding 3483 connection->state = SEND_CREATE_CONNECTION; 3484 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3485 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3486 connection->bonding_flags = BONDING_DEDICATED; 3487 3488 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3489 3490 // handle: connnection failure (connection complete != ok) 3491 // handle: authentication failure 3492 // handle: disconnect on done 3493 3494 hci_run(); 3495 3496 return 0; 3497 } 3498 #endif 3499 3500 void gap_set_local_name(const char * local_name){ 3501 hci_stack->local_name = local_name; 3502 } 3503 3504 3505 #ifdef ENABLE_BLE 3506 3507 #ifdef ENABLE_LE_CENTRAL 3508 void gap_start_scan(void){ 3509 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3510 hci_stack->le_scanning_state = LE_START_SCAN; 3511 hci_run(); 3512 } 3513 3514 void gap_stop_scan(void){ 3515 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3516 hci_stack->le_scanning_state = LE_STOP_SCAN; 3517 hci_run(); 3518 } 3519 3520 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3521 hci_stack->le_scan_type = scan_type; 3522 hci_stack->le_scan_interval = scan_interval; 3523 hci_stack->le_scan_window = scan_window; 3524 hci_run(); 3525 } 3526 3527 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3528 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3529 if (!conn){ 3530 log_info("gap_connect: no connection exists yet, creating context"); 3531 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3532 if (!conn){ 3533 // notify client that alloc failed 3534 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3535 log_info("gap_connect: failed to alloc hci_connection_t"); 3536 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3537 } 3538 conn->state = SEND_CREATE_CONNECTION; 3539 log_info("gap_connect: send create connection next"); 3540 hci_run(); 3541 return 0; 3542 } 3543 3544 if (!hci_is_le_connection(conn) || 3545 conn->state == SEND_CREATE_CONNECTION || 3546 conn->state == SENT_CREATE_CONNECTION) { 3547 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3548 log_error("gap_connect: classic connection or connect is already being created"); 3549 return GATT_CLIENT_IN_WRONG_STATE; 3550 } 3551 3552 log_info("gap_connect: context exists with state %u", conn->state); 3553 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3554 hci_run(); 3555 return 0; 3556 } 3557 3558 // @assumption: only a single outgoing LE Connection exists 3559 static hci_connection_t * gap_get_outgoing_connection(void){ 3560 btstack_linked_item_t *it; 3561 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3562 hci_connection_t * conn = (hci_connection_t *) it; 3563 if (!hci_is_le_connection(conn)) continue; 3564 switch (conn->state){ 3565 case SEND_CREATE_CONNECTION: 3566 case SENT_CREATE_CONNECTION: 3567 return conn; 3568 default: 3569 break; 3570 }; 3571 } 3572 return NULL; 3573 } 3574 3575 uint8_t gap_connect_cancel(void){ 3576 hci_connection_t * conn = gap_get_outgoing_connection(); 3577 if (!conn) return 0; 3578 switch (conn->state){ 3579 case SEND_CREATE_CONNECTION: 3580 // skip sending create connection and emit event instead 3581 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3582 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3583 btstack_memory_hci_connection_free( conn ); 3584 break; 3585 case SENT_CREATE_CONNECTION: 3586 // request to send cancel connection 3587 conn->state = SEND_CANCEL_CONNECTION; 3588 hci_run(); 3589 break; 3590 default: 3591 break; 3592 } 3593 return 0; 3594 } 3595 #endif 3596 3597 /** 3598 * @brief Updates the connection parameters for a given LE connection 3599 * @param handle 3600 * @param conn_interval_min (unit: 1.25ms) 3601 * @param conn_interval_max (unit: 1.25ms) 3602 * @param conn_latency 3603 * @param supervision_timeout (unit: 10ms) 3604 * @returns 0 if ok 3605 */ 3606 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3607 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3608 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3609 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3610 connection->le_conn_interval_min = conn_interval_min; 3611 connection->le_conn_interval_max = conn_interval_max; 3612 connection->le_conn_latency = conn_latency; 3613 connection->le_supervision_timeout = supervision_timeout; 3614 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3615 hci_run(); 3616 return 0; 3617 } 3618 3619 /** 3620 * @brief Request an update of the connection parameter for a given LE connection 3621 * @param handle 3622 * @param conn_interval_min (unit: 1.25ms) 3623 * @param conn_interval_max (unit: 1.25ms) 3624 * @param conn_latency 3625 * @param supervision_timeout (unit: 10ms) 3626 * @returns 0 if ok 3627 */ 3628 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3629 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3630 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3631 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3632 connection->le_conn_interval_min = conn_interval_min; 3633 connection->le_conn_interval_max = conn_interval_max; 3634 connection->le_conn_latency = conn_latency; 3635 connection->le_supervision_timeout = supervision_timeout; 3636 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3637 hci_run(); 3638 return 0; 3639 } 3640 3641 #ifdef ENABLE_LE_PERIPHERAL 3642 3643 static void gap_advertisments_changed(void){ 3644 // disable advertisements before updating adv, scan data, or adv params 3645 if (hci_stack->le_advertisements_active){ 3646 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3647 } 3648 hci_run(); 3649 } 3650 3651 /** 3652 * @brief Set Advertisement Data 3653 * @param advertising_data_length 3654 * @param advertising_data (max 31 octets) 3655 * @note data is not copied, pointer has to stay valid 3656 */ 3657 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3658 hci_stack->le_advertisements_data_len = advertising_data_length; 3659 hci_stack->le_advertisements_data = advertising_data; 3660 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3661 gap_advertisments_changed(); 3662 } 3663 3664 /** 3665 * @brief Set Scan Response Data 3666 * @param advertising_data_length 3667 * @param advertising_data (max 31 octets) 3668 * @note data is not copied, pointer has to stay valid 3669 */ 3670 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3671 hci_stack->le_scan_response_data_len = scan_response_data_length; 3672 hci_stack->le_scan_response_data = scan_response_data; 3673 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3674 gap_advertisments_changed(); 3675 } 3676 3677 /** 3678 * @brief Set Advertisement Parameters 3679 * @param adv_int_min 3680 * @param adv_int_max 3681 * @param adv_type 3682 * @param direct_address_type 3683 * @param direct_address 3684 * @param channel_map 3685 * @param filter_policy 3686 * 3687 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3688 */ 3689 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3690 uint8_t direct_address_typ, bd_addr_t direct_address, 3691 uint8_t channel_map, uint8_t filter_policy) { 3692 3693 hci_stack->le_advertisements_interval_min = adv_int_min; 3694 hci_stack->le_advertisements_interval_max = adv_int_max; 3695 hci_stack->le_advertisements_type = adv_type; 3696 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3697 hci_stack->le_advertisements_channel_map = channel_map; 3698 hci_stack->le_advertisements_filter_policy = filter_policy; 3699 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3700 3701 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3702 gap_advertisments_changed(); 3703 } 3704 3705 /** 3706 * @brief Enable/Disable Advertisements 3707 * @param enabled 3708 */ 3709 void gap_advertisements_enable(int enabled){ 3710 hci_stack->le_advertisements_enabled = enabled; 3711 if (enabled && !hci_stack->le_advertisements_active){ 3712 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3713 } 3714 if (!enabled && hci_stack->le_advertisements_active){ 3715 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3716 } 3717 hci_run(); 3718 } 3719 3720 #endif 3721 3722 void hci_le_set_own_address_type(uint8_t own_address_type){ 3723 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3724 if (own_address_type == hci_stack->le_own_addr_type) return; 3725 hci_stack->le_own_addr_type = own_address_type; 3726 3727 #ifdef ENABLE_LE_PERIPHERAL 3728 // update advertisement parameters, too 3729 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3730 gap_advertisments_changed(); 3731 #endif 3732 #ifdef ENABLE_LE_CENTRAL 3733 // note: we don't update scan parameters or modify ongoing connection attempts 3734 #endif 3735 } 3736 3737 #endif 3738 3739 uint8_t gap_disconnect(hci_con_handle_t handle){ 3740 hci_connection_t * conn = hci_connection_for_handle(handle); 3741 if (!conn){ 3742 hci_emit_disconnection_complete(handle, 0); 3743 return 0; 3744 } 3745 conn->state = SEND_DISCONNECT; 3746 hci_run(); 3747 return 0; 3748 } 3749 3750 /** 3751 * @brief Get connection type 3752 * @param con_handle 3753 * @result connection_type 3754 */ 3755 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3756 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3757 if (!conn) return GAP_CONNECTION_INVALID; 3758 switch (conn->address_type){ 3759 case BD_ADDR_TYPE_LE_PUBLIC: 3760 case BD_ADDR_TYPE_LE_RANDOM: 3761 return GAP_CONNECTION_LE; 3762 case BD_ADDR_TYPE_SCO: 3763 return GAP_CONNECTION_SCO; 3764 case BD_ADDR_TYPE_CLASSIC: 3765 return GAP_CONNECTION_ACL; 3766 default: 3767 return GAP_CONNECTION_INVALID; 3768 } 3769 } 3770 3771 #ifdef ENABLE_BLE 3772 3773 #ifdef ENABLE_LE_CENTRAL 3774 /** 3775 * @brief Auto Connection Establishment - Start Connecting to device 3776 * @param address_typ 3777 * @param address 3778 * @returns 0 if ok 3779 */ 3780 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3781 // check capacity 3782 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3783 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3784 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3785 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3786 entry->address_type = address_type; 3787 memcpy(entry->address, address, 6); 3788 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3789 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3790 hci_run(); 3791 return 0; 3792 } 3793 3794 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3795 btstack_linked_list_iterator_t it; 3796 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3797 while (btstack_linked_list_iterator_has_next(&it)){ 3798 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3799 if (entry->address_type != address_type) continue; 3800 if (memcmp(entry->address, address, 6) != 0) continue; 3801 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3802 // remove from controller if already present 3803 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3804 continue; 3805 } 3806 // direclty remove entry from whitelist 3807 btstack_linked_list_iterator_remove(&it); 3808 btstack_memory_whitelist_entry_free(entry); 3809 } 3810 } 3811 3812 /** 3813 * @brief Auto Connection Establishment - Stop Connecting to device 3814 * @param address_typ 3815 * @param address 3816 * @returns 0 if ok 3817 */ 3818 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3819 hci_remove_from_whitelist(address_type, address); 3820 hci_run(); 3821 return 0; 3822 } 3823 3824 /** 3825 * @brief Auto Connection Establishment - Stop everything 3826 * @note Convenience function to stop all active auto connection attempts 3827 */ 3828 void gap_auto_connection_stop_all(void){ 3829 btstack_linked_list_iterator_t it; 3830 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3831 while (btstack_linked_list_iterator_has_next(&it)){ 3832 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3833 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3834 // remove from controller if already present 3835 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3836 continue; 3837 } 3838 // directly remove entry from whitelist 3839 btstack_linked_list_iterator_remove(&it); 3840 btstack_memory_whitelist_entry_free(entry); 3841 } 3842 hci_run(); 3843 } 3844 #endif 3845 #endif 3846 3847 #ifdef ENABLE_CLASSIC 3848 /** 3849 * @brief Set Extended Inquiry Response data 3850 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3851 * @note has to be done before stack starts up 3852 */ 3853 void gap_set_extended_inquiry_response(const uint8_t * data){ 3854 hci_stack->eir_data = data; 3855 } 3856 3857 /** 3858 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3859 * @param inquriy_mode see bluetooth_defines.h 3860 */ 3861 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3862 hci_stack->inquiry_mode = mode; 3863 } 3864 3865 /** 3866 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3867 */ 3868 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3869 hci_stack->sco_voice_setting = voice_setting; 3870 } 3871 3872 /** 3873 * @brief Get SCO Voice Setting 3874 * @return current voice setting 3875 */ 3876 uint16_t hci_get_sco_voice_setting(void){ 3877 return hci_stack->sco_voice_setting; 3878 } 3879 3880 /** @brief Get SCO packet length for current SCO Voice setting 3881 * @note Using SCO packets of the exact length is required for USB transfer 3882 * @return Length of SCO packets in bytes (not audio frames) 3883 */ 3884 int hci_get_sco_packet_length(void){ 3885 // see Core Spec for H2 USB Transfer. 3886 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3887 return 27; 3888 } 3889 #endif 3890 3891 /** 3892 * @brief Set callback for Bluetooth Hardware Error 3893 */ 3894 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3895 hci_stack->hardware_error_callback = fn; 3896 } 3897 3898 void hci_disconnect_all(void){ 3899 btstack_linked_list_iterator_t it; 3900 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3901 while (btstack_linked_list_iterator_has_next(&it)){ 3902 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3903 if (con->state == SENT_DISCONNECT) continue; 3904 con->state = SEND_DISCONNECT; 3905 } 3906 hci_run(); 3907 } 3908 3909 uint16_t hci_get_manufacturer(void){ 3910 return hci_stack->manufacturer; 3911 } 3912