1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "gap.h" 75 #include "hci.h" 76 #include "hci_cmd.h" 77 #include "hci_dump.h" 78 79 80 #define HCI_CONNECTION_TIMEOUT_MS 10000 81 #define HCI_RESET_RESEND_TIMEOUT_MS 200 82 83 // prototypes 84 #ifdef ENABLE_CLASSIC 85 static void hci_update_scan_enable(void); 86 static void hci_emit_discoverable_enabled(uint8_t enabled); 87 static int hci_local_ssp_activated(void); 88 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 89 static void hci_notify_if_sco_can_send_now(void); 90 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 91 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 92 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 93 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 94 static void hci_connection_timestamp(hci_connection_t *connection); 95 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 96 #endif 97 static int hci_power_control_on(void); 98 static void hci_power_control_off(void); 99 static void hci_state_reset(void); 100 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 101 static void hci_emit_nr_connections_changed(void); 102 static void hci_emit_hci_open_failed(void); 103 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 104 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 105 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 106 static void hci_run(void); 107 static int hci_is_le_connection(hci_connection_t * connection); 108 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 109 110 #ifdef ENABLE_BLE 111 #ifdef ENABLE_LE_CENTRAL 112 // called from test/ble_client/advertising_data_parser.c 113 void le_handle_advertisement_report(uint8_t *packet, int size); 114 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 115 #endif 116 #endif 117 118 // the STACK is here 119 #ifndef HAVE_MALLOC 120 static hci_stack_t hci_stack_static; 121 #endif 122 static hci_stack_t * hci_stack = NULL; 123 124 #ifdef ENABLE_CLASSIC 125 // test helper 126 static uint8_t disable_l2cap_timeouts = 0; 127 #endif 128 129 /** 130 * create connection for given address 131 * 132 * @return connection OR NULL, if no memory left 133 */ 134 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 135 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 136 hci_connection_t * conn = btstack_memory_hci_connection_get(); 137 if (!conn) return NULL; 138 memset(conn, 0, sizeof(hci_connection_t)); 139 bd_addr_copy(conn->address, addr); 140 conn->address_type = addr_type; 141 conn->con_handle = 0xffff; 142 conn->authentication_flags = AUTH_FLAGS_NONE; 143 conn->bonding_flags = 0; 144 conn->requested_security_level = LEVEL_0; 145 #ifdef ENABLE_CLASSIC 146 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 147 btstack_run_loop_set_timer_context(&conn->timeout, conn); 148 hci_connection_timestamp(conn); 149 #endif 150 conn->acl_recombination_length = 0; 151 conn->acl_recombination_pos = 0; 152 conn->num_acl_packets_sent = 0; 153 conn->num_sco_packets_sent = 0; 154 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 155 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 156 return conn; 157 } 158 159 160 /** 161 * get le connection parameter range 162 * 163 * @return le connection parameter range struct 164 */ 165 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 166 *range = hci_stack->le_connection_parameter_range; 167 } 168 169 /** 170 * set le connection parameter range 171 * 172 */ 173 174 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 175 hci_stack->le_connection_parameter_range = *range; 176 } 177 178 /** 179 * get hci connections iterator 180 * 181 * @return hci connections iterator 182 */ 183 184 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 185 btstack_linked_list_iterator_init(it, &hci_stack->connections); 186 } 187 188 /** 189 * get connection for a given handle 190 * 191 * @return connection OR NULL, if not found 192 */ 193 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 194 btstack_linked_list_iterator_t it; 195 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 196 while (btstack_linked_list_iterator_has_next(&it)){ 197 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 198 if ( item->con_handle == con_handle ) { 199 return item; 200 } 201 } 202 return NULL; 203 } 204 205 /** 206 * get connection for given address 207 * 208 * @return connection OR NULL, if not found 209 */ 210 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 211 btstack_linked_list_iterator_t it; 212 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 213 while (btstack_linked_list_iterator_has_next(&it)){ 214 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 215 if (connection->address_type != addr_type) continue; 216 if (memcmp(addr, connection->address, 6) != 0) continue; 217 return connection; 218 } 219 return NULL; 220 } 221 222 223 #ifdef ENABLE_CLASSIC 224 225 #ifdef ENABLE_SCO_OVER_HCI 226 static int hci_number_sco_connections(void){ 227 int connections = 0; 228 btstack_linked_list_iterator_t it; 229 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 230 while (btstack_linked_list_iterator_has_next(&it)){ 231 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 232 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 233 connections++; 234 } 235 return connections; 236 } 237 #endif 238 239 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 240 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 241 #ifdef HAVE_EMBEDDED_TICK 242 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 243 // connections might be timed out 244 hci_emit_l2cap_check_timeout(connection); 245 } 246 #else 247 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 248 // connections might be timed out 249 hci_emit_l2cap_check_timeout(connection); 250 } 251 #endif 252 } 253 254 static void hci_connection_timestamp(hci_connection_t *connection){ 255 #ifdef HAVE_EMBEDDED_TICK 256 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 257 #else 258 connection->timestamp = btstack_run_loop_get_time_ms(); 259 #endif 260 } 261 262 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 263 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 264 } 265 266 267 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 268 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 269 } 270 271 /** 272 * add authentication flags and reset timer 273 * @note: assumes classic connection 274 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 275 */ 276 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 277 bd_addr_t addr; 278 reverse_bd_addr(bd_addr, addr); 279 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 280 if (conn) { 281 connectionSetAuthenticationFlags(conn, flags); 282 hci_connection_timestamp(conn); 283 } 284 } 285 286 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 287 hci_connection_t * conn = hci_connection_for_handle(handle); 288 if (!conn) return 0; 289 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 290 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 291 return 0; 292 } 293 294 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 295 if (!hci_stack->link_key_db) return; 296 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 297 hci_stack->link_key_db->delete_link_key(addr); 298 } 299 300 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 301 if (!hci_stack->link_key_db) return; 302 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 303 hci_stack->link_key_db->put_link_key(addr, link_key, type); 304 } 305 #endif 306 307 static int hci_is_le_connection(hci_connection_t * connection){ 308 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 309 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 310 } 311 312 /** 313 * count connections 314 */ 315 static int nr_hci_connections(void){ 316 int count = 0; 317 btstack_linked_item_t *it; 318 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 319 return count; 320 } 321 322 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 323 324 unsigned int num_packets_sent_classic = 0; 325 unsigned int num_packets_sent_le = 0; 326 327 btstack_linked_item_t *it; 328 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 329 hci_connection_t * connection = (hci_connection_t *) it; 330 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 331 num_packets_sent_classic += connection->num_acl_packets_sent; 332 } else { 333 num_packets_sent_le += connection->num_acl_packets_sent; 334 } 335 } 336 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 337 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 338 int free_slots_le = 0; 339 340 if (free_slots_classic < 0){ 341 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); 342 return 0; 343 } 344 345 if (hci_stack->le_acl_packets_total_num){ 346 // if we have LE slots, they are used 347 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 348 if (free_slots_le < 0){ 349 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); 350 return 0; 351 } 352 } else { 353 // otherwise, classic slots are used for LE, too 354 free_slots_classic -= num_packets_sent_le; 355 if (free_slots_classic < 0){ 356 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); 357 return 0; 358 } 359 } 360 361 switch (address_type){ 362 case BD_ADDR_TYPE_UNKNOWN: 363 log_error("hci_number_free_acl_slots: unknown address type"); 364 return 0; 365 366 case BD_ADDR_TYPE_CLASSIC: 367 return free_slots_classic; 368 369 default: 370 if (hci_stack->le_acl_packets_total_num){ 371 return free_slots_le; 372 } 373 return free_slots_classic; 374 } 375 } 376 377 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 378 // get connection type 379 hci_connection_t * connection = hci_connection_for_handle(con_handle); 380 if (!connection){ 381 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 382 return 0; 383 } 384 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 385 } 386 387 #ifdef ENABLE_CLASSIC 388 static int hci_number_free_sco_slots(void){ 389 unsigned int num_sco_packets_sent = 0; 390 btstack_linked_item_t *it; 391 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 392 hci_connection_t * connection = (hci_connection_t *) it; 393 num_sco_packets_sent += connection->num_sco_packets_sent; 394 } 395 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 396 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 397 return 0; 398 } 399 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 400 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 401 } 402 #endif 403 404 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 405 int hci_can_send_command_packet_now(void){ 406 if (hci_stack->hci_packet_buffer_reserved) return 0; 407 408 // check for async hci transport implementations 409 if (hci_stack->hci_transport->can_send_packet_now){ 410 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 411 return 0; 412 } 413 } 414 415 return hci_stack->num_cmd_packets > 0; 416 } 417 418 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 419 // check for async hci transport implementations 420 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 421 return hci_stack->hci_transport->can_send_packet_now(packet_type); 422 } 423 424 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 425 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 426 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 427 } 428 429 int hci_can_send_acl_le_packet_now(void){ 430 if (hci_stack->hci_packet_buffer_reserved) return 0; 431 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 432 } 433 434 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 435 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 436 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 437 } 438 439 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 440 if (hci_stack->hci_packet_buffer_reserved) return 0; 441 return hci_can_send_prepared_acl_packet_now(con_handle); 442 } 443 444 #ifdef ENABLE_CLASSIC 445 int hci_can_send_acl_classic_packet_now(void){ 446 if (hci_stack->hci_packet_buffer_reserved) return 0; 447 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 448 } 449 450 int hci_can_send_prepared_sco_packet_now(void){ 451 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 452 if (!hci_stack->synchronous_flow_control_enabled) return 1; 453 return hci_number_free_sco_slots() > 0; 454 } 455 456 int hci_can_send_sco_packet_now(void){ 457 if (hci_stack->hci_packet_buffer_reserved) return 0; 458 return hci_can_send_prepared_sco_packet_now(); 459 } 460 461 void hci_request_sco_can_send_now_event(void){ 462 hci_stack->sco_waiting_for_can_send_now = 1; 463 hci_notify_if_sco_can_send_now(); 464 } 465 #endif 466 467 // used for internal checks in l2cap.c 468 int hci_is_packet_buffer_reserved(void){ 469 return hci_stack->hci_packet_buffer_reserved; 470 } 471 472 // reserves outgoing packet buffer. @returns 1 if successful 473 int hci_reserve_packet_buffer(void){ 474 if (hci_stack->hci_packet_buffer_reserved) { 475 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 476 return 0; 477 } 478 hci_stack->hci_packet_buffer_reserved = 1; 479 return 1; 480 } 481 482 void hci_release_packet_buffer(void){ 483 hci_stack->hci_packet_buffer_reserved = 0; 484 } 485 486 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 487 static int hci_transport_synchronous(void){ 488 return hci_stack->hci_transport->can_send_packet_now == NULL; 489 } 490 491 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 492 493 // 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); 494 495 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 496 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 497 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 498 max_acl_data_packet_length = hci_stack->le_data_packets_length; 499 } 500 501 // testing: reduce buffer to minimum 502 // max_acl_data_packet_length = 52; 503 504 log_debug("hci_send_acl_packet_fragments entered"); 505 506 int err; 507 // multiple packets could be send on a synchronous HCI transport 508 while (1){ 509 510 log_debug("hci_send_acl_packet_fragments loop entered"); 511 512 // get current data 513 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 514 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 515 int more_fragments = 0; 516 517 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 518 if (current_acl_data_packet_length > max_acl_data_packet_length){ 519 more_fragments = 1; 520 current_acl_data_packet_length = max_acl_data_packet_length; 521 } 522 523 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 524 if (acl_header_pos > 0){ 525 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 526 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 527 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 528 } 529 530 // update header len 531 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 532 533 // count packet 534 connection->num_acl_packets_sent++; 535 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 536 537 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 538 if (more_fragments){ 539 // update start of next fragment to send 540 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 541 } else { 542 // done 543 hci_stack->acl_fragmentation_pos = 0; 544 hci_stack->acl_fragmentation_total_size = 0; 545 } 546 547 // send packet 548 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 549 const int size = current_acl_data_packet_length + 4; 550 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 551 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 552 553 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 554 555 // done yet? 556 if (!more_fragments) break; 557 558 // can send more? 559 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 560 } 561 562 log_debug("hci_send_acl_packet_fragments loop over"); 563 564 // release buffer now for synchronous transport 565 if (hci_transport_synchronous()){ 566 hci_release_packet_buffer(); 567 // notify upper stack that it might be possible to send again 568 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 569 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 570 } 571 572 return err; 573 } 574 575 // pre: caller has reserved the packet buffer 576 int hci_send_acl_packet_buffer(int size){ 577 578 // log_info("hci_send_acl_packet_buffer size %u", size); 579 580 if (!hci_stack->hci_packet_buffer_reserved) { 581 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 582 return 0; 583 } 584 585 uint8_t * packet = hci_stack->hci_packet_buffer; 586 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 587 588 // check for free places on Bluetooth module 589 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 590 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 591 hci_release_packet_buffer(); 592 return BTSTACK_ACL_BUFFERS_FULL; 593 } 594 595 hci_connection_t *connection = hci_connection_for_handle( con_handle); 596 if (!connection) { 597 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 598 hci_release_packet_buffer(); 599 return 0; 600 } 601 602 #ifdef ENABLE_CLASSIC 603 hci_connection_timestamp(connection); 604 #endif 605 606 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 607 608 // setup data 609 hci_stack->acl_fragmentation_total_size = size; 610 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 611 612 return hci_send_acl_packet_fragments(connection); 613 } 614 615 #ifdef ENABLE_CLASSIC 616 // pre: caller has reserved the packet buffer 617 int hci_send_sco_packet_buffer(int size){ 618 619 // log_info("hci_send_acl_packet_buffer size %u", size); 620 621 if (!hci_stack->hci_packet_buffer_reserved) { 622 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 623 return 0; 624 } 625 626 uint8_t * packet = hci_stack->hci_packet_buffer; 627 628 // skip checks in loopback mode 629 if (!hci_stack->loopback_mode){ 630 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 631 632 // check for free places on Bluetooth module 633 if (!hci_can_send_prepared_sco_packet_now()) { 634 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 635 hci_release_packet_buffer(); 636 return BTSTACK_ACL_BUFFERS_FULL; 637 } 638 639 // track send packet in connection struct 640 hci_connection_t *connection = hci_connection_for_handle( con_handle); 641 if (!connection) { 642 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 643 hci_release_packet_buffer(); 644 return 0; 645 } 646 connection->num_sco_packets_sent++; 647 } 648 649 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 650 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 651 652 if (hci_transport_synchronous()){ 653 hci_release_packet_buffer(); 654 // notify upper stack that it might be possible to send again 655 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 656 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 657 } 658 659 return err; 660 } 661 #endif 662 663 static void acl_handler(uint8_t *packet, int size){ 664 665 // log_info("acl_handler: size %u", size); 666 667 // get info 668 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 669 hci_connection_t *conn = hci_connection_for_handle(con_handle); 670 uint8_t acl_flags = READ_ACL_FLAGS(packet); 671 uint16_t acl_length = READ_ACL_LENGTH(packet); 672 673 // ignore non-registered handle 674 if (!conn){ 675 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 676 return; 677 } 678 679 // assert packet is complete 680 if (acl_length + 4 != size){ 681 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 682 return; 683 } 684 685 #ifdef ENABLE_CLASSIC 686 // update idle timestamp 687 hci_connection_timestamp(conn); 688 #endif 689 690 // handle different packet types 691 switch (acl_flags & 0x03) { 692 693 case 0x01: // continuation fragment 694 695 // sanity checks 696 if (conn->acl_recombination_pos == 0) { 697 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 698 return; 699 } 700 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 701 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 702 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 703 conn->acl_recombination_pos = 0; 704 return; 705 } 706 707 // append fragment payload (header already stored) 708 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 709 conn->acl_recombination_pos += acl_length; 710 711 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 712 // conn->acl_recombination_pos, conn->acl_recombination_length); 713 714 // forward complete L2CAP packet if complete. 715 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 716 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 717 // reset recombination buffer 718 conn->acl_recombination_length = 0; 719 conn->acl_recombination_pos = 0; 720 } 721 break; 722 723 case 0x02: { // first fragment 724 725 // sanity check 726 if (conn->acl_recombination_pos) { 727 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 728 conn->acl_recombination_pos = 0; 729 } 730 731 // peek into L2CAP packet! 732 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 733 734 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 735 736 // compare fragment size to L2CAP packet size 737 if (acl_length >= l2cap_length + 4){ 738 // forward fragment as L2CAP packet 739 hci_emit_acl_packet(packet, acl_length + 4); 740 } else { 741 742 if (acl_length > HCI_ACL_BUFFER_SIZE){ 743 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 744 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 745 return; 746 } 747 748 // store first fragment and tweak acl length for complete package 749 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 750 conn->acl_recombination_pos = acl_length + 4; 751 conn->acl_recombination_length = l2cap_length; 752 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 753 } 754 break; 755 756 } 757 default: 758 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 759 return; 760 } 761 762 // execute main loop 763 hci_run(); 764 } 765 766 static void hci_shutdown_connection(hci_connection_t *conn){ 767 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 768 769 #ifdef ENABLE_SCO_OVER_HCI 770 int addr_type = conn->address_type; 771 #endif 772 773 btstack_run_loop_remove_timer(&conn->timeout); 774 775 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 776 btstack_memory_hci_connection_free( conn ); 777 778 // now it's gone 779 hci_emit_nr_connections_changed(); 780 781 #ifdef ENABLE_SCO_OVER_HCI 782 // update SCO 783 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 784 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 785 } 786 #endif 787 } 788 789 #ifdef ENABLE_CLASSIC 790 791 static const uint16_t packet_type_sizes[] = { 792 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 793 HCI_ACL_DH1_SIZE, 0, 0, 0, 794 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 795 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 796 }; 797 static const uint8_t packet_type_feature_requirement_bit[] = { 798 0, // 3 slot packets 799 1, // 5 slot packets 800 25, // EDR 2 mpbs 801 26, // EDR 3 mbps 802 39, // 3 slot EDR packts 803 40, // 5 slot EDR packet 804 }; 805 static const uint16_t packet_type_feature_packet_mask[] = { 806 0x0f00, // 3 slot packets 807 0xf000, // 5 slot packets 808 0x1102, // EDR 2 mpbs 809 0x2204, // EDR 3 mbps 810 0x0300, // 3 slot EDR packts 811 0x3000, // 5 slot EDR packet 812 }; 813 814 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 815 // enable packet types based on size 816 uint16_t packet_types = 0; 817 unsigned int i; 818 for (i=0;i<16;i++){ 819 if (packet_type_sizes[i] == 0) continue; 820 if (packet_type_sizes[i] <= buffer_size){ 821 packet_types |= 1 << i; 822 } 823 } 824 // disable packet types due to missing local supported features 825 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 826 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 827 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 828 if (feature_set) continue; 829 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 830 packet_types &= ~packet_type_feature_packet_mask[i]; 831 } 832 // flip bits for "may not be used" 833 packet_types ^= 0x3306; 834 return packet_types; 835 } 836 837 uint16_t hci_usable_acl_packet_types(void){ 838 return hci_stack->packet_types; 839 } 840 #endif 841 842 uint8_t* hci_get_outgoing_packet_buffer(void){ 843 // hci packet buffer is >= acl data packet length 844 return hci_stack->hci_packet_buffer; 845 } 846 847 uint16_t hci_max_acl_data_packet_length(void){ 848 return hci_stack->acl_data_packet_length; 849 } 850 851 #ifdef ENABLE_CLASSIC 852 int hci_extended_sco_link_supported(void){ 853 // No. 31, byte 3, bit 7 854 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 855 } 856 #endif 857 858 int hci_non_flushable_packet_boundary_flag_supported(void){ 859 // No. 54, byte 6, bit 6 860 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 861 } 862 863 static int gap_ssp_supported(void){ 864 // No. 51, byte 6, bit 3 865 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 866 } 867 868 static int hci_classic_supported(void){ 869 #ifdef ENABLE_CLASSIC 870 // No. 37, byte 4, bit 5, = No BR/EDR Support 871 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 872 #else 873 return 0; 874 #endif 875 } 876 877 static int hci_le_supported(void){ 878 #ifdef ENABLE_BLE 879 // No. 37, byte 4, bit 6 = LE Supported (Controller) 880 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 881 #else 882 return 0; 883 #endif 884 } 885 886 #ifdef ENABLE_BLE 887 888 /** 889 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 890 */ 891 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 892 *addr_type = hci_stack->le_own_addr_type; 893 if (hci_stack->le_own_addr_type){ 894 memcpy(addr, hci_stack->le_random_address, 6); 895 } else { 896 memcpy(addr, hci_stack->local_bd_addr, 6); 897 } 898 } 899 900 #ifdef ENABLE_LE_CENTRAL 901 void le_handle_advertisement_report(uint8_t *packet, int size){ 902 903 UNUSED(size); 904 905 int offset = 3; 906 int num_reports = packet[offset]; 907 offset += 1; 908 909 int i; 910 // log_info("HCI: handle adv report with num reports: %d", num_reports); 911 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 912 for (i=0; i<num_reports;i++){ 913 uint8_t data_length = packet[offset + 8]; 914 uint8_t event_size = 10 + data_length; 915 int pos = 0; 916 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 917 event[pos++] = event_size; 918 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 919 offset += 8; 920 pos += 8; 921 event[pos++] = packet[offset + 1 + data_length]; // rssi 922 event[pos++] = packet[offset++]; //data_length; 923 memcpy(&event[pos], &packet[offset], data_length); 924 pos += data_length; 925 offset += data_length + 1; // rssi 926 hci_emit_event(event, pos, 1); 927 } 928 } 929 #endif 930 #endif 931 932 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 933 934 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 935 if (!hci_stack->config) return 0; 936 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 937 // Limit baud rate for Broadcom chipsets to 3 mbps 938 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 939 baud_rate = 3000000; 940 } 941 return baud_rate; 942 } 943 944 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 945 UNUSED(ds); 946 947 switch (hci_stack->substate){ 948 case HCI_INIT_W4_SEND_RESET: 949 log_info("Resend HCI Reset"); 950 hci_stack->substate = HCI_INIT_SEND_RESET; 951 hci_stack->num_cmd_packets = 1; 952 hci_run(); 953 break; 954 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 955 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 956 if (hci_stack->hci_transport->reset_link){ 957 hci_stack->hci_transport->reset_link(); 958 } 959 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 960 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 961 log_info("Resend HCI Reset - CSR Warm Boot"); 962 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 963 hci_stack->num_cmd_packets = 1; 964 hci_run(); 965 break; 966 case HCI_INIT_W4_SEND_BAUD_CHANGE: 967 if (hci_stack->hci_transport->set_baudrate){ 968 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 969 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 970 hci_stack->hci_transport->set_baudrate(baud_rate); 971 } 972 // For CSR, HCI Reset is sent on new baud rate 973 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 974 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 975 hci_run(); 976 } 977 break; 978 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 979 // otherwise continue 980 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 981 hci_send_cmd(&hci_read_local_supported_commands); 982 break; 983 default: 984 break; 985 } 986 } 987 #endif 988 989 static void hci_initializing_next_state(void){ 990 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 991 } 992 993 // assumption: hci_can_send_command_packet_now() == true 994 static void hci_initializing_run(void){ 995 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 996 switch (hci_stack->substate){ 997 case HCI_INIT_SEND_RESET: 998 hci_state_reset(); 999 1000 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1001 // prepare reset if command complete not received in 100ms 1002 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1003 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1004 btstack_run_loop_add_timer(&hci_stack->timeout); 1005 #endif 1006 // send command 1007 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1008 hci_send_cmd(&hci_reset); 1009 break; 1010 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1011 hci_send_cmd(&hci_read_local_version_information); 1012 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1013 break; 1014 case HCI_INIT_SEND_READ_LOCAL_NAME: 1015 hci_send_cmd(&hci_read_local_name); 1016 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1017 break; 1018 1019 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1020 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1021 hci_state_reset(); 1022 // prepare reset if command complete not received in 100ms 1023 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1024 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1025 btstack_run_loop_add_timer(&hci_stack->timeout); 1026 // send command 1027 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1028 hci_send_cmd(&hci_reset); 1029 break; 1030 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1031 hci_state_reset(); 1032 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1033 hci_send_cmd(&hci_reset); 1034 break; 1035 case HCI_INIT_SEND_BAUD_CHANGE: { 1036 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1037 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1038 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1039 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1040 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1041 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1042 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1043 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1044 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1045 btstack_run_loop_add_timer(&hci_stack->timeout); 1046 } 1047 break; 1048 } 1049 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1050 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1051 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1052 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1053 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1054 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1055 break; 1056 } 1057 case HCI_INIT_CUSTOM_INIT: 1058 // Custom initialization 1059 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1060 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1061 if (valid_cmd){ 1062 int size = 3 + hci_stack->hci_packet_buffer[2]; 1063 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1064 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1065 switch (valid_cmd) { 1066 case 1: 1067 default: 1068 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1069 break; 1070 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1071 log_info("CSR Warm Boot"); 1072 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1073 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1074 btstack_run_loop_add_timer(&hci_stack->timeout); 1075 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1076 && hci_stack->config 1077 && hci_stack->chipset 1078 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1079 && hci_stack->hci_transport->set_baudrate 1080 && hci_transport_uart_get_main_baud_rate()){ 1081 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1082 } else { 1083 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1084 } 1085 break; 1086 } 1087 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1088 break; 1089 } 1090 log_info("Init script done"); 1091 1092 // Init script download on Broadcom chipsets causes: 1093 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1094 // - baud rate to reset, restore UART baud rate if needed 1095 int need_baud_change = hci_stack->config 1096 && hci_stack->chipset 1097 && hci_stack->chipset->set_baudrate_command 1098 && hci_stack->hci_transport->set_baudrate 1099 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1100 if (need_baud_change) { 1101 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1102 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1103 hci_stack->hci_transport->set_baudrate(baud_rate); 1104 } 1105 1106 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1107 // -> Work around: wait a few milliseconds here. 1108 log_info("BCM delay after init script"); 1109 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1110 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1111 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1112 btstack_run_loop_add_timer(&hci_stack->timeout); 1113 break; 1114 } 1115 } 1116 // otherwise continue 1117 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1118 hci_send_cmd(&hci_read_local_supported_commands); 1119 break; 1120 case HCI_INIT_SET_BD_ADDR: 1121 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1122 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1123 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1124 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1125 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1126 break; 1127 #endif 1128 1129 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1130 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1131 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1132 hci_send_cmd(&hci_read_local_supported_commands); 1133 break; 1134 case HCI_INIT_READ_BD_ADDR: 1135 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1136 hci_send_cmd(&hci_read_bd_addr); 1137 break; 1138 case HCI_INIT_READ_BUFFER_SIZE: 1139 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1140 hci_send_cmd(&hci_read_buffer_size); 1141 break; 1142 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1143 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1144 hci_send_cmd(&hci_read_local_supported_features); 1145 break; 1146 case HCI_INIT_SET_EVENT_MASK: 1147 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1148 if (hci_le_supported()){ 1149 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1150 } else { 1151 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1152 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1153 } 1154 break; 1155 #ifdef ENABLE_CLASSIC 1156 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1157 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1158 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1159 break; 1160 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1161 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1162 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1163 break; 1164 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1165 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1166 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1167 break; 1168 case HCI_INIT_WRITE_LOCAL_NAME: 1169 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1170 if (hci_stack->local_name){ 1171 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1172 } else { 1173 char local_name[8+17+1]; 1174 // BTstack 11:22:33:44:55:66 1175 memcpy(local_name, "BTstack ", 8); 1176 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1177 local_name[8+17] = '\0'; 1178 log_info("---> Name %s", local_name); 1179 hci_send_cmd(&hci_write_local_name, local_name); 1180 } 1181 break; 1182 case HCI_INIT_WRITE_EIR_DATA: 1183 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1184 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1185 break; 1186 case HCI_INIT_WRITE_INQUIRY_MODE: 1187 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1188 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1189 break; 1190 case HCI_INIT_WRITE_SCAN_ENABLE: 1191 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1192 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1193 break; 1194 // only sent if ENABLE_SCO_OVER_HCI is defined 1195 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1196 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1197 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1198 break; 1199 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1200 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1201 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1202 break; 1203 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1204 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1205 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1206 log_info("BCM: Route SCO data via HCI transport"); 1207 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1208 break; 1209 1210 #endif 1211 #ifdef ENABLE_BLE 1212 // LE INIT 1213 case HCI_INIT_LE_READ_BUFFER_SIZE: 1214 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1215 hci_send_cmd(&hci_le_read_buffer_size); 1216 break; 1217 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1218 // LE Supported Host = 1, Simultaneous Host = 0 1219 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1220 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1221 break; 1222 #ifdef ENABLE_LE_CENTRAL 1223 case HCI_INIT_READ_WHITE_LIST_SIZE: 1224 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1225 hci_send_cmd(&hci_le_read_white_list_size); 1226 break; 1227 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1228 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1229 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1230 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1231 break; 1232 #endif 1233 #endif 1234 default: 1235 return; 1236 } 1237 } 1238 1239 static void hci_init_done(void){ 1240 // done. tell the app 1241 log_info("hci_init_done -> HCI_STATE_WORKING"); 1242 hci_stack->state = HCI_STATE_WORKING; 1243 hci_emit_state(); 1244 hci_run(); 1245 } 1246 1247 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1248 UNUSED(size); 1249 1250 uint8_t command_completed = 0; 1251 1252 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1253 uint16_t opcode = little_endian_read_16(packet,3); 1254 if (opcode == hci_stack->last_cmd_opcode){ 1255 command_completed = 1; 1256 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1257 } else { 1258 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1259 } 1260 } 1261 1262 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1263 uint8_t status = packet[2]; 1264 uint16_t opcode = little_endian_read_16(packet,4); 1265 if (opcode == hci_stack->last_cmd_opcode){ 1266 if (status){ 1267 command_completed = 1; 1268 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1269 } else { 1270 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1271 } 1272 } else { 1273 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1274 } 1275 } 1276 1277 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1278 1279 // Vendor == CSR 1280 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1281 // TODO: track actual command 1282 command_completed = 1; 1283 } 1284 1285 // Vendor == Toshiba 1286 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1287 // TODO: track actual command 1288 command_completed = 1; 1289 } 1290 1291 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1292 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1293 // 1294 // HCI Reset 1295 // Timeout 100 ms 1296 // HCI Reset 1297 // Command Complete Reset 1298 // HCI Read Local Version Information 1299 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1300 // hang... 1301 // 1302 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1303 if (!command_completed 1304 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1305 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1306 1307 uint16_t opcode = little_endian_read_16(packet,3); 1308 if (opcode == hci_reset.opcode){ 1309 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1310 return; 1311 } 1312 } 1313 1314 // CSR & H5 1315 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1316 if (!command_completed 1317 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1318 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1319 1320 uint16_t opcode = little_endian_read_16(packet,3); 1321 if (opcode == hci_reset.opcode){ 1322 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1323 return; 1324 } 1325 } 1326 1327 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1328 // fix: Correct substate and behave as command below 1329 if (command_completed){ 1330 switch (hci_stack->substate){ 1331 case HCI_INIT_SEND_RESET: 1332 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1333 break; 1334 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1335 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1336 break; 1337 default: 1338 break; 1339 } 1340 } 1341 1342 #endif 1343 1344 if (!command_completed) return; 1345 1346 int need_baud_change = 0; 1347 int need_addr_change = 0; 1348 1349 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1350 need_baud_change = hci_stack->config 1351 && hci_stack->chipset 1352 && hci_stack->chipset->set_baudrate_command 1353 && hci_stack->hci_transport->set_baudrate 1354 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1355 1356 need_addr_change = hci_stack->custom_bd_addr_set 1357 && hci_stack->chipset 1358 && hci_stack->chipset->set_bd_addr_command; 1359 #endif 1360 1361 switch(hci_stack->substate){ 1362 1363 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1364 case HCI_INIT_SEND_RESET: 1365 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1366 // fix: just correct substate and behave as command below 1367 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1368 btstack_run_loop_remove_timer(&hci_stack->timeout); 1369 break; 1370 case HCI_INIT_W4_SEND_RESET: 1371 btstack_run_loop_remove_timer(&hci_stack->timeout); 1372 break; 1373 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1374 log_info("Received local name, need baud change %d", need_baud_change); 1375 if (need_baud_change){ 1376 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1377 return; 1378 } 1379 // skip baud change 1380 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1381 return; 1382 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1383 // for STLC2500D, baud rate change already happened. 1384 // for others, baud rate gets changed now 1385 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1386 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1387 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1388 hci_stack->hci_transport->set_baudrate(baud_rate); 1389 } 1390 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1391 return; 1392 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1393 btstack_run_loop_remove_timer(&hci_stack->timeout); 1394 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1395 return; 1396 case HCI_INIT_W4_CUSTOM_INIT: 1397 // repeat custom init 1398 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1399 return; 1400 #else 1401 case HCI_INIT_W4_SEND_RESET: 1402 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1403 return ; 1404 #endif 1405 1406 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1407 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1408 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1409 return; 1410 } 1411 if (need_addr_change){ 1412 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1413 return; 1414 } 1415 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1416 return; 1417 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1418 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1419 if (need_baud_change){ 1420 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1421 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1422 hci_stack->hci_transport->set_baudrate(baud_rate); 1423 } 1424 if (need_addr_change){ 1425 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1426 return; 1427 } 1428 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1429 return; 1430 case HCI_INIT_W4_SET_BD_ADDR: 1431 // for STLC2500D, bd addr change only gets active after sending reset command 1432 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1433 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1434 return; 1435 } 1436 // skipping st warm boot 1437 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1438 return; 1439 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1440 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1441 return; 1442 #endif 1443 case HCI_INIT_W4_READ_BD_ADDR: 1444 // only read buffer size if supported 1445 if (hci_stack->local_supported_commands[0] & 0x01) { 1446 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1447 return; 1448 } 1449 // skipping read buffer size 1450 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1451 return; 1452 case HCI_INIT_W4_SET_EVENT_MASK: 1453 // skip Classic init commands for LE only chipsets 1454 if (!hci_classic_supported()){ 1455 #ifdef ENABLE_BLE 1456 if (hci_le_supported()){ 1457 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1458 return; 1459 } 1460 #endif 1461 log_error("Neither BR/EDR nor LE supported"); 1462 hci_init_done(); 1463 return; 1464 } 1465 if (!gap_ssp_supported()){ 1466 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1467 return; 1468 } 1469 break; 1470 #ifdef ENABLE_BLE 1471 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1472 // skip write le host if not supported (e.g. on LE only EM9301) 1473 if (hci_stack->local_supported_commands[0] & 0x02) break; 1474 #ifdef ENABLE_LE_CENTRAL 1475 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1476 #else 1477 hci_init_done(); 1478 #endif 1479 return; 1480 #endif 1481 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1482 // skip write eir data if no eir data set 1483 if (hci_stack->eir_data) break; 1484 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1485 return; 1486 1487 #ifdef ENABLE_SCO_OVER_HCI 1488 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1489 // skip write synchronous flow control if not supported 1490 if (hci_stack->local_supported_commands[0] & 0x04) break; 1491 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1492 // explicit fall through to reduce repetitions 1493 1494 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1495 // skip write default erroneous data reporting if not supported 1496 if (hci_stack->local_supported_commands[0] & 0x08) break; 1497 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1498 // explicit fall through to reduce repetitions 1499 1500 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1501 // skip bcm set sco pcm config on non-Broadcom chipsets 1502 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1503 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1504 // explicit fall through to reduce repetitions 1505 1506 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1507 if (!hci_le_supported()){ 1508 // SKIP LE init for Classic only configuration 1509 hci_init_done(); 1510 return; 1511 } 1512 break; 1513 1514 #else /* !ENABLE_SCO_OVER_HCI */ 1515 1516 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1517 #ifdef ENABLE_BLE 1518 if (hci_le_supported()){ 1519 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1520 return; 1521 } 1522 #endif 1523 // SKIP LE init for Classic only configuration 1524 hci_init_done(); 1525 return; 1526 #endif /* ENABLE_SCO_OVER_HCI */ 1527 1528 // Response to command before init done state -> init done 1529 case (HCI_INIT_DONE-1): 1530 hci_init_done(); 1531 return; 1532 1533 default: 1534 break; 1535 } 1536 hci_initializing_next_state(); 1537 } 1538 1539 static void event_handler(uint8_t *packet, int size){ 1540 1541 uint16_t event_length = packet[1]; 1542 1543 // assert packet is complete 1544 if (size != event_length + 2){ 1545 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1546 return; 1547 } 1548 1549 bd_addr_t addr; 1550 bd_addr_type_t addr_type; 1551 uint8_t link_type; 1552 hci_con_handle_t handle; 1553 hci_connection_t * conn; 1554 int i; 1555 1556 // warnings 1557 (void) link_type; 1558 1559 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1560 1561 switch (hci_event_packet_get_type(packet)) { 1562 1563 case HCI_EVENT_COMMAND_COMPLETE: 1564 // get num cmd packets - limit to 1 to reduce complexity 1565 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1566 1567 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1568 if (packet[5]) break; 1569 // terminate, name 248 chars 1570 packet[6+248] = 0; 1571 log_info("local name: %s", &packet[6]); 1572 } 1573 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1574 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1575 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1576 uint16_t acl_len = little_endian_read_16(packet, 6); 1577 uint16_t sco_len = packet[8]; 1578 1579 // determine usable ACL/SCO payload size 1580 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1581 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1582 1583 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1584 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1585 1586 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1587 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1588 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1589 } 1590 } 1591 #ifdef ENABLE_BLE 1592 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1593 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1594 hci_stack->le_acl_packets_total_num = packet[8]; 1595 // determine usable ACL payload size 1596 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1597 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1598 } 1599 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1600 } 1601 #ifdef ENABLE_LE_CENTRAL 1602 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1603 hci_stack->le_whitelist_capacity = packet[6]; 1604 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1605 } 1606 #endif 1607 #endif 1608 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1609 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1610 hci_stack->local_bd_addr); 1611 log_info("Local Address, Status: 0x%02x: Addr: %s", 1612 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1613 #ifdef ENABLE_CLASSIC 1614 if (hci_stack->link_key_db){ 1615 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1616 } 1617 #endif 1618 } 1619 #ifdef ENABLE_CLASSIC 1620 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1621 hci_emit_discoverable_enabled(hci_stack->discoverable); 1622 } 1623 #endif 1624 1625 // Note: HCI init checks 1626 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1627 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1628 1629 #ifdef ENABLE_CLASSIC 1630 // determine usable ACL packet types based on host buffer size and supported features 1631 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1632 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1633 #endif 1634 // Classic/LE 1635 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1636 } 1637 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1638 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1639 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1640 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1641 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1642 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1643 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1644 } 1645 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1646 hci_stack->local_supported_commands[0] = 1647 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1648 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1649 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1650 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1651 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1652 } 1653 #ifdef ENABLE_CLASSIC 1654 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1655 if (packet[5] == 0){ 1656 hci_stack->synchronous_flow_control_enabled = 1; 1657 } 1658 } 1659 #endif 1660 break; 1661 1662 case HCI_EVENT_COMMAND_STATUS: 1663 // get num cmd packets - limit to 1 to reduce complexity 1664 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1665 break; 1666 1667 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1668 int offset = 3; 1669 for (i=0; i<packet[2];i++){ 1670 handle = little_endian_read_16(packet, offset); 1671 offset += 2; 1672 uint16_t num_packets = little_endian_read_16(packet, offset); 1673 offset += 2; 1674 1675 conn = hci_connection_for_handle(handle); 1676 if (!conn){ 1677 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1678 continue; 1679 } 1680 1681 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1682 #ifdef ENABLE_CLASSIC 1683 if (conn->num_sco_packets_sent >= num_packets){ 1684 conn->num_sco_packets_sent -= num_packets; 1685 } else { 1686 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1687 conn->num_sco_packets_sent = 0; 1688 } 1689 hci_notify_if_sco_can_send_now(); 1690 #endif 1691 } else { 1692 if (conn->num_acl_packets_sent >= num_packets){ 1693 conn->num_acl_packets_sent -= num_packets; 1694 } else { 1695 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1696 conn->num_acl_packets_sent = 0; 1697 } 1698 } 1699 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1700 } 1701 break; 1702 } 1703 1704 #ifdef ENABLE_CLASSIC 1705 case HCI_EVENT_CONNECTION_REQUEST: 1706 reverse_bd_addr(&packet[2], addr); 1707 // TODO: eval COD 8-10 1708 link_type = packet[11]; 1709 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1710 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1711 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1712 if (!conn) { 1713 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1714 } 1715 if (!conn) { 1716 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1717 hci_stack->decline_reason = 0x0d; 1718 bd_addr_copy(hci_stack->decline_addr, addr); 1719 break; 1720 } 1721 conn->role = HCI_ROLE_SLAVE; 1722 conn->state = RECEIVED_CONNECTION_REQUEST; 1723 // store info about eSCO 1724 if (link_type == 0x02){ 1725 conn->remote_supported_feature_eSCO = 1; 1726 } 1727 hci_run(); 1728 break; 1729 1730 case HCI_EVENT_CONNECTION_COMPLETE: 1731 // Connection management 1732 reverse_bd_addr(&packet[5], addr); 1733 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1734 addr_type = BD_ADDR_TYPE_CLASSIC; 1735 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1736 if (conn) { 1737 if (!packet[2]){ 1738 conn->state = OPEN; 1739 conn->con_handle = little_endian_read_16(packet, 3); 1740 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1741 1742 // restart timer 1743 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1744 btstack_run_loop_add_timer(&conn->timeout); 1745 1746 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1747 1748 hci_emit_nr_connections_changed(); 1749 } else { 1750 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1751 uint8_t status = packet[2]; 1752 bd_addr_t bd_address; 1753 memcpy(&bd_address, conn->address, 6); 1754 1755 // connection failed, remove entry 1756 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1757 btstack_memory_hci_connection_free( conn ); 1758 1759 // notify client if dedicated bonding 1760 if (notify_dedicated_bonding_failed){ 1761 log_info("hci notify_dedicated_bonding_failed"); 1762 hci_emit_dedicated_bonding_result(bd_address, status); 1763 } 1764 1765 // if authentication error, also delete link key 1766 if (packet[2] == 0x05) { 1767 gap_drop_link_key_for_bd_addr(addr); 1768 } 1769 } 1770 } 1771 break; 1772 1773 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1774 reverse_bd_addr(&packet[5], addr); 1775 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1776 if (packet[2]){ 1777 // connection failed 1778 break; 1779 } 1780 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1781 if (!conn) { 1782 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1783 } 1784 if (!conn) { 1785 break; 1786 } 1787 conn->state = OPEN; 1788 conn->con_handle = little_endian_read_16(packet, 3); 1789 1790 #ifdef ENABLE_SCO_OVER_HCI 1791 // update SCO 1792 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1793 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1794 } 1795 #endif 1796 break; 1797 1798 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1799 handle = little_endian_read_16(packet, 3); 1800 conn = hci_connection_for_handle(handle); 1801 if (!conn) break; 1802 if (!packet[2]){ 1803 uint8_t * features = &packet[5]; 1804 if (features[6] & (1 << 3)){ 1805 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1806 } 1807 if (features[3] & (1<<7)){ 1808 conn->remote_supported_feature_eSCO = 1; 1809 } 1810 } 1811 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1812 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1813 if (conn->bonding_flags & BONDING_DEDICATED){ 1814 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1815 } 1816 break; 1817 1818 case HCI_EVENT_LINK_KEY_REQUEST: 1819 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1820 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1821 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1822 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1823 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1824 hci_run(); 1825 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1826 return; 1827 1828 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1829 reverse_bd_addr(&packet[2], addr); 1830 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1831 if (!conn) break; 1832 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1833 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1834 // Change Connection Encryption keeps link key type 1835 if (link_key_type != CHANGED_COMBINATION_KEY){ 1836 conn->link_key_type = link_key_type; 1837 } 1838 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1839 // still forward event to allow dismiss of pairing dialog 1840 break; 1841 } 1842 1843 case HCI_EVENT_PIN_CODE_REQUEST: 1844 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1845 // non-bondable mode: pin code negative reply will be sent 1846 if (!hci_stack->bondable){ 1847 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1848 hci_run(); 1849 return; 1850 } 1851 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1852 if (!hci_stack->link_key_db) break; 1853 hci_event_pin_code_request_get_bd_addr(packet, addr); 1854 hci_stack->link_key_db->delete_link_key(addr); 1855 break; 1856 1857 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1858 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1859 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1860 break; 1861 1862 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1863 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1864 if (!hci_stack->ssp_auto_accept) break; 1865 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1866 break; 1867 1868 case HCI_EVENT_USER_PASSKEY_REQUEST: 1869 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1870 if (!hci_stack->ssp_auto_accept) break; 1871 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1872 break; 1873 #endif 1874 1875 case HCI_EVENT_ENCRYPTION_CHANGE: 1876 handle = little_endian_read_16(packet, 3); 1877 conn = hci_connection_for_handle(handle); 1878 if (!conn) break; 1879 if (packet[2] == 0) { 1880 if (packet[5]){ 1881 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1882 } else { 1883 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1884 } 1885 } 1886 #ifdef ENABLE_CLASSIC 1887 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1888 #endif 1889 break; 1890 1891 #ifdef ENABLE_CLASSIC 1892 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1893 handle = little_endian_read_16(packet, 3); 1894 conn = hci_connection_for_handle(handle); 1895 if (!conn) break; 1896 1897 // dedicated bonding: send result and disconnect 1898 if (conn->bonding_flags & BONDING_DEDICATED){ 1899 conn->bonding_flags &= ~BONDING_DEDICATED; 1900 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1901 conn->bonding_status = packet[2]; 1902 break; 1903 } 1904 1905 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1906 // link key sufficient for requested security 1907 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1908 break; 1909 } 1910 // not enough 1911 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1912 break; 1913 #endif 1914 1915 // HCI_EVENT_DISCONNECTION_COMPLETE 1916 // has been split, to first notify stack before shutting connection down 1917 // see end of function, too. 1918 case HCI_EVENT_DISCONNECTION_COMPLETE: 1919 if (packet[2]) break; // status != 0 1920 handle = little_endian_read_16(packet, 3); 1921 // drop outgoing ACL fragments if it is for closed connection 1922 if (hci_stack->acl_fragmentation_total_size > 0) { 1923 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1924 log_info("hci: drop fragmented ACL data for closed connection"); 1925 hci_stack->acl_fragmentation_total_size = 0; 1926 hci_stack->acl_fragmentation_pos = 0; 1927 } 1928 } 1929 1930 // re-enable advertisements for le connections if active 1931 conn = hci_connection_for_handle(handle); 1932 if (!conn) break; 1933 #ifdef ENABLE_BLE 1934 #ifdef ENABLE_LE_PERIPHERAL 1935 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1936 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1937 } 1938 #endif 1939 #endif 1940 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1941 break; 1942 1943 case HCI_EVENT_HARDWARE_ERROR: 1944 log_error("Hardware Error: 0x%02x", packet[2]); 1945 if (hci_stack->hardware_error_callback){ 1946 (*hci_stack->hardware_error_callback)(packet[2]); 1947 } else { 1948 // if no special requests, just reboot stack 1949 hci_power_control_off(); 1950 hci_power_control_on(); 1951 } 1952 break; 1953 1954 #ifdef ENABLE_CLASSIC 1955 case HCI_EVENT_ROLE_CHANGE: 1956 if (packet[2]) break; // status != 0 1957 handle = little_endian_read_16(packet, 3); 1958 conn = hci_connection_for_handle(handle); 1959 if (!conn) break; // no conn 1960 conn->role = packet[9]; 1961 break; 1962 #endif 1963 1964 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1965 // release packet buffer only for asynchronous transport and if there are not further fragements 1966 if (hci_transport_synchronous()) { 1967 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1968 return; // instead of break: to avoid re-entering hci_run() 1969 } 1970 if (hci_stack->acl_fragmentation_total_size) break; 1971 hci_release_packet_buffer(); 1972 1973 // L2CAP receives this event via the hci_emit_event below 1974 1975 #ifdef ENABLE_CLASSIC 1976 // For SCO, we do the can_send_now_check here 1977 hci_notify_if_sco_can_send_now(); 1978 #endif 1979 break; 1980 1981 #ifdef ENABLE_CLASSIC 1982 case HCI_EVENT_SCO_CAN_SEND_NOW: 1983 // For SCO, we do the can_send_now_check here 1984 hci_notify_if_sco_can_send_now(); 1985 return; 1986 #endif 1987 1988 #ifdef ENABLE_BLE 1989 case HCI_EVENT_LE_META: 1990 switch (packet[2]){ 1991 #ifdef ENABLE_LE_CENTRAL 1992 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1993 // log_info("advertising report received"); 1994 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1995 le_handle_advertisement_report(packet, size); 1996 break; 1997 #endif 1998 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1999 // Connection management 2000 reverse_bd_addr(&packet[8], addr); 2001 addr_type = (bd_addr_type_t)packet[7]; 2002 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2003 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2004 #ifdef ENABLE_LE_CENTRAL 2005 // if auto-connect, remove from whitelist in both roles 2006 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2007 hci_remove_from_whitelist(addr_type, addr); 2008 } 2009 // handle error: error is reported only to the initiator -> outgoing connection 2010 if (packet[3]){ 2011 // outgoing connection establishment is done 2012 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2013 // remove entry 2014 if (conn){ 2015 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2016 btstack_memory_hci_connection_free( conn ); 2017 } 2018 break; 2019 } 2020 #endif 2021 // on success, both hosts receive connection complete event 2022 if (packet[6] == HCI_ROLE_MASTER){ 2023 #ifdef ENABLE_LE_CENTRAL 2024 // if we're master, it was an outgoing connection and we're done with it 2025 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2026 #endif 2027 } else { 2028 #ifdef ENABLE_LE_PERIPHERAL 2029 // if we're slave, it was an incoming connection, advertisements have stopped 2030 hci_stack->le_advertisements_active = 0; 2031 // try to re-enable them 2032 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2033 #endif 2034 } 2035 // LE connections are auto-accepted, so just create a connection if there isn't one already 2036 if (!conn){ 2037 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2038 } 2039 // no memory, sorry. 2040 if (!conn){ 2041 break; 2042 } 2043 2044 conn->state = OPEN; 2045 conn->role = packet[6]; 2046 conn->con_handle = little_endian_read_16(packet, 4); 2047 2048 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2049 2050 // restart timer 2051 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2052 // btstack_run_loop_add_timer(&conn->timeout); 2053 2054 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2055 2056 hci_emit_nr_connections_changed(); 2057 break; 2058 2059 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2060 2061 default: 2062 break; 2063 } 2064 break; 2065 #endif 2066 default: 2067 break; 2068 } 2069 2070 // handle BT initialization 2071 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2072 hci_initializing_event_handler(packet, size); 2073 } 2074 2075 // help with BT sleep 2076 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2077 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2078 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2079 hci_initializing_next_state(); 2080 } 2081 2082 // notify upper stack 2083 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2084 2085 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2086 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2087 if (!packet[2]){ 2088 handle = little_endian_read_16(packet, 3); 2089 hci_connection_t * aConn = hci_connection_for_handle(handle); 2090 if (aConn) { 2091 uint8_t status = aConn->bonding_status; 2092 uint16_t flags = aConn->bonding_flags; 2093 bd_addr_t bd_address; 2094 memcpy(&bd_address, aConn->address, 6); 2095 hci_shutdown_connection(aConn); 2096 // connection struct is gone, don't access anymore 2097 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2098 hci_emit_dedicated_bonding_result(bd_address, status); 2099 } 2100 } 2101 } 2102 } 2103 2104 // execute main loop 2105 hci_run(); 2106 } 2107 2108 #ifdef ENABLE_CLASSIC 2109 static void sco_handler(uint8_t * packet, uint16_t size){ 2110 if (!hci_stack->sco_packet_handler) return; 2111 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2112 } 2113 #endif 2114 2115 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2116 hci_dump_packet(packet_type, 1, packet, size); 2117 switch (packet_type) { 2118 case HCI_EVENT_PACKET: 2119 event_handler(packet, size); 2120 break; 2121 case HCI_ACL_DATA_PACKET: 2122 acl_handler(packet, size); 2123 break; 2124 #ifdef ENABLE_CLASSIC 2125 case HCI_SCO_DATA_PACKET: 2126 sco_handler(packet, size); 2127 break; 2128 #endif 2129 default: 2130 break; 2131 } 2132 } 2133 2134 /** 2135 * @brief Add event packet handler. 2136 */ 2137 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2138 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2139 } 2140 2141 2142 /** Register HCI packet handlers */ 2143 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2144 hci_stack->acl_packet_handler = handler; 2145 } 2146 2147 #ifdef ENABLE_CLASSIC 2148 /** 2149 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2150 */ 2151 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2152 hci_stack->sco_packet_handler = handler; 2153 } 2154 #endif 2155 2156 static void hci_state_reset(void){ 2157 // no connections yet 2158 hci_stack->connections = NULL; 2159 2160 // keep discoverable/connectable as this has been requested by the client(s) 2161 // hci_stack->discoverable = 0; 2162 // hci_stack->connectable = 0; 2163 // hci_stack->bondable = 1; 2164 // hci_stack->own_addr_type = 0; 2165 2166 // buffer is free 2167 hci_stack->hci_packet_buffer_reserved = 0; 2168 2169 // no pending cmds 2170 hci_stack->decline_reason = 0; 2171 hci_stack->new_scan_enable_value = 0xff; 2172 2173 // LE 2174 #ifdef ENABLE_BLE 2175 memset(hci_stack->le_random_address, 0, 6); 2176 hci_stack->le_random_address_set = 0; 2177 #endif 2178 #ifdef ENABLE_LE_CENTRAL 2179 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2180 hci_stack->le_scan_type = 0xff; 2181 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2182 hci_stack->le_whitelist = 0; 2183 hci_stack->le_whitelist_capacity = 0; 2184 #endif 2185 2186 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2187 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2188 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2189 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2190 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2191 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2192 } 2193 2194 #ifdef ENABLE_CLASSIC 2195 /** 2196 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2197 */ 2198 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2199 // store and open remote device db 2200 hci_stack->link_key_db = link_key_db; 2201 if (hci_stack->link_key_db) { 2202 hci_stack->link_key_db->open(); 2203 } 2204 } 2205 #endif 2206 2207 void hci_init(const hci_transport_t *transport, const void *config){ 2208 2209 #ifdef HAVE_MALLOC 2210 if (!hci_stack) { 2211 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2212 } 2213 #else 2214 hci_stack = &hci_stack_static; 2215 #endif 2216 memset(hci_stack, 0, sizeof(hci_stack_t)); 2217 2218 // reference to use transport layer implementation 2219 hci_stack->hci_transport = transport; 2220 2221 // reference to used config 2222 hci_stack->config = config; 2223 2224 // setup pointer for outgoing packet buffer 2225 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2226 2227 // max acl payload size defined in config.h 2228 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2229 2230 // register packet handlers with transport 2231 transport->register_packet_handler(&packet_handler); 2232 2233 hci_stack->state = HCI_STATE_OFF; 2234 2235 // class of device 2236 hci_stack->class_of_device = 0x007a020c; // Smartphone 2237 2238 // bondable by default 2239 hci_stack->bondable = 1; 2240 2241 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2242 hci_stack->ssp_enable = 1; 2243 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2244 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2245 hci_stack->ssp_auto_accept = 1; 2246 2247 // voice setting - signed 16 bit pcm data with CVSD over the air 2248 hci_stack->sco_voice_setting = 0x60; 2249 2250 hci_state_reset(); 2251 } 2252 2253 /** 2254 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2255 */ 2256 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2257 hci_stack->chipset = chipset_driver; 2258 2259 // reset chipset driver - init is also called on power_up 2260 if (hci_stack->chipset && hci_stack->chipset->init){ 2261 hci_stack->chipset->init(hci_stack->config); 2262 } 2263 } 2264 2265 /** 2266 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2267 */ 2268 void hci_set_control(const btstack_control_t *hardware_control){ 2269 // references to used control implementation 2270 hci_stack->control = hardware_control; 2271 // init with transport config 2272 hardware_control->init(hci_stack->config); 2273 } 2274 2275 void hci_close(void){ 2276 // close remote device db 2277 if (hci_stack->link_key_db) { 2278 hci_stack->link_key_db->close(); 2279 } 2280 2281 btstack_linked_list_iterator_t lit; 2282 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2283 while (btstack_linked_list_iterator_has_next(&lit)){ 2284 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2285 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2286 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2287 hci_shutdown_connection(connection); 2288 } 2289 2290 hci_power_control(HCI_POWER_OFF); 2291 2292 #ifdef HAVE_MALLOC 2293 free(hci_stack); 2294 #endif 2295 hci_stack = NULL; 2296 } 2297 2298 #ifdef ENABLE_CLASSIC 2299 void gap_set_class_of_device(uint32_t class_of_device){ 2300 hci_stack->class_of_device = class_of_device; 2301 } 2302 2303 void hci_disable_l2cap_timeout_check(void){ 2304 disable_l2cap_timeouts = 1; 2305 } 2306 #endif 2307 2308 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2309 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2310 void hci_set_bd_addr(bd_addr_t addr){ 2311 memcpy(hci_stack->custom_bd_addr, addr, 6); 2312 hci_stack->custom_bd_addr_set = 1; 2313 } 2314 #endif 2315 2316 // State-Module-Driver overview 2317 // state module low-level 2318 // HCI_STATE_OFF off close 2319 // HCI_STATE_INITIALIZING, on open 2320 // HCI_STATE_WORKING, on open 2321 // HCI_STATE_HALTING, on open 2322 // HCI_STATE_SLEEPING, off/sleep close 2323 // HCI_STATE_FALLING_ASLEEP on open 2324 2325 static int hci_power_control_on(void){ 2326 2327 // power on 2328 int err = 0; 2329 if (hci_stack->control && hci_stack->control->on){ 2330 err = (*hci_stack->control->on)(); 2331 } 2332 if (err){ 2333 log_error( "POWER_ON failed"); 2334 hci_emit_hci_open_failed(); 2335 return err; 2336 } 2337 2338 // int chipset driver 2339 if (hci_stack->chipset && hci_stack->chipset->init){ 2340 hci_stack->chipset->init(hci_stack->config); 2341 } 2342 2343 // init transport 2344 if (hci_stack->hci_transport->init){ 2345 hci_stack->hci_transport->init(hci_stack->config); 2346 } 2347 2348 // open transport 2349 err = hci_stack->hci_transport->open(); 2350 if (err){ 2351 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2352 if (hci_stack->control && hci_stack->control->off){ 2353 (*hci_stack->control->off)(); 2354 } 2355 hci_emit_hci_open_failed(); 2356 return err; 2357 } 2358 return 0; 2359 } 2360 2361 static void hci_power_control_off(void){ 2362 2363 log_info("hci_power_control_off"); 2364 2365 // close low-level device 2366 hci_stack->hci_transport->close(); 2367 2368 log_info("hci_power_control_off - hci_transport closed"); 2369 2370 // power off 2371 if (hci_stack->control && hci_stack->control->off){ 2372 (*hci_stack->control->off)(); 2373 } 2374 2375 log_info("hci_power_control_off - control closed"); 2376 2377 hci_stack->state = HCI_STATE_OFF; 2378 } 2379 2380 static void hci_power_control_sleep(void){ 2381 2382 log_info("hci_power_control_sleep"); 2383 2384 #if 0 2385 // don't close serial port during sleep 2386 2387 // close low-level device 2388 hci_stack->hci_transport->close(hci_stack->config); 2389 #endif 2390 2391 // sleep mode 2392 if (hci_stack->control && hci_stack->control->sleep){ 2393 (*hci_stack->control->sleep)(); 2394 } 2395 2396 hci_stack->state = HCI_STATE_SLEEPING; 2397 } 2398 2399 static int hci_power_control_wake(void){ 2400 2401 log_info("hci_power_control_wake"); 2402 2403 // wake on 2404 if (hci_stack->control && hci_stack->control->wake){ 2405 (*hci_stack->control->wake)(); 2406 } 2407 2408 #if 0 2409 // open low-level device 2410 int err = hci_stack->hci_transport->open(hci_stack->config); 2411 if (err){ 2412 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2413 if (hci_stack->control && hci_stack->control->off){ 2414 (*hci_stack->control->off)(); 2415 } 2416 hci_emit_hci_open_failed(); 2417 return err; 2418 } 2419 #endif 2420 2421 return 0; 2422 } 2423 2424 static void hci_power_transition_to_initializing(void){ 2425 // set up state machine 2426 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2427 hci_stack->hci_packet_buffer_reserved = 0; 2428 hci_stack->state = HCI_STATE_INITIALIZING; 2429 hci_stack->substate = HCI_INIT_SEND_RESET; 2430 } 2431 2432 int hci_power_control(HCI_POWER_MODE power_mode){ 2433 2434 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2435 2436 int err = 0; 2437 switch (hci_stack->state){ 2438 2439 case HCI_STATE_OFF: 2440 switch (power_mode){ 2441 case HCI_POWER_ON: 2442 err = hci_power_control_on(); 2443 if (err) { 2444 log_error("hci_power_control_on() error %d", err); 2445 return err; 2446 } 2447 hci_power_transition_to_initializing(); 2448 break; 2449 case HCI_POWER_OFF: 2450 // do nothing 2451 break; 2452 case HCI_POWER_SLEEP: 2453 // do nothing (with SLEEP == OFF) 2454 break; 2455 } 2456 break; 2457 2458 case HCI_STATE_INITIALIZING: 2459 switch (power_mode){ 2460 case HCI_POWER_ON: 2461 // do nothing 2462 break; 2463 case HCI_POWER_OFF: 2464 // no connections yet, just turn it off 2465 hci_power_control_off(); 2466 break; 2467 case HCI_POWER_SLEEP: 2468 // no connections yet, just turn it off 2469 hci_power_control_sleep(); 2470 break; 2471 } 2472 break; 2473 2474 case HCI_STATE_WORKING: 2475 switch (power_mode){ 2476 case HCI_POWER_ON: 2477 // do nothing 2478 break; 2479 case HCI_POWER_OFF: 2480 // see hci_run 2481 hci_stack->state = HCI_STATE_HALTING; 2482 break; 2483 case HCI_POWER_SLEEP: 2484 // see hci_run 2485 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2486 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2487 break; 2488 } 2489 break; 2490 2491 case HCI_STATE_HALTING: 2492 switch (power_mode){ 2493 case HCI_POWER_ON: 2494 hci_power_transition_to_initializing(); 2495 break; 2496 case HCI_POWER_OFF: 2497 // do nothing 2498 break; 2499 case HCI_POWER_SLEEP: 2500 // see hci_run 2501 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2502 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2503 break; 2504 } 2505 break; 2506 2507 case HCI_STATE_FALLING_ASLEEP: 2508 switch (power_mode){ 2509 case HCI_POWER_ON: 2510 2511 #ifdef HAVE_PLATFORM_IPHONE_OS 2512 // nothing to do, if H4 supports power management 2513 if (btstack_control_iphone_power_management_enabled()){ 2514 hci_stack->state = HCI_STATE_INITIALIZING; 2515 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2516 break; 2517 } 2518 #endif 2519 hci_power_transition_to_initializing(); 2520 break; 2521 case HCI_POWER_OFF: 2522 // see hci_run 2523 hci_stack->state = HCI_STATE_HALTING; 2524 break; 2525 case HCI_POWER_SLEEP: 2526 // do nothing 2527 break; 2528 } 2529 break; 2530 2531 case HCI_STATE_SLEEPING: 2532 switch (power_mode){ 2533 case HCI_POWER_ON: 2534 2535 #ifdef HAVE_PLATFORM_IPHONE_OS 2536 // nothing to do, if H4 supports power management 2537 if (btstack_control_iphone_power_management_enabled()){ 2538 hci_stack->state = HCI_STATE_INITIALIZING; 2539 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2540 hci_update_scan_enable(); 2541 break; 2542 } 2543 #endif 2544 err = hci_power_control_wake(); 2545 if (err) return err; 2546 hci_power_transition_to_initializing(); 2547 break; 2548 case HCI_POWER_OFF: 2549 hci_stack->state = HCI_STATE_HALTING; 2550 break; 2551 case HCI_POWER_SLEEP: 2552 // do nothing 2553 break; 2554 } 2555 break; 2556 } 2557 2558 // create internal event 2559 hci_emit_state(); 2560 2561 // trigger next/first action 2562 hci_run(); 2563 2564 return 0; 2565 } 2566 2567 2568 #ifdef ENABLE_CLASSIC 2569 2570 static void hci_update_scan_enable(void){ 2571 // 2 = page scan, 1 = inq scan 2572 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2573 hci_run(); 2574 } 2575 2576 void gap_discoverable_control(uint8_t enable){ 2577 if (enable) enable = 1; // normalize argument 2578 2579 if (hci_stack->discoverable == enable){ 2580 hci_emit_discoverable_enabled(hci_stack->discoverable); 2581 return; 2582 } 2583 2584 hci_stack->discoverable = enable; 2585 hci_update_scan_enable(); 2586 } 2587 2588 void gap_connectable_control(uint8_t enable){ 2589 if (enable) enable = 1; // normalize argument 2590 2591 // don't emit event 2592 if (hci_stack->connectable == enable) return; 2593 2594 hci_stack->connectable = enable; 2595 hci_update_scan_enable(); 2596 } 2597 #endif 2598 2599 void gap_local_bd_addr(bd_addr_t address_buffer){ 2600 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2601 } 2602 2603 static void hci_run(void){ 2604 2605 // log_info("hci_run: entered"); 2606 btstack_linked_item_t * it; 2607 2608 // send continuation fragments first, as they block the prepared packet buffer 2609 if (hci_stack->acl_fragmentation_total_size > 0) { 2610 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2611 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2612 if (connection) { 2613 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2614 hci_send_acl_packet_fragments(connection); 2615 return; 2616 } 2617 } else { 2618 // connection gone -> discard further fragments 2619 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2620 hci_stack->acl_fragmentation_total_size = 0; 2621 hci_stack->acl_fragmentation_pos = 0; 2622 } 2623 } 2624 2625 if (!hci_can_send_command_packet_now()) return; 2626 2627 // global/non-connection oriented commands 2628 2629 #ifdef ENABLE_CLASSIC 2630 // decline incoming connections 2631 if (hci_stack->decline_reason){ 2632 uint8_t reason = hci_stack->decline_reason; 2633 hci_stack->decline_reason = 0; 2634 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2635 return; 2636 } 2637 2638 // send scan enable 2639 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2640 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2641 hci_stack->new_scan_enable_value = 0xff; 2642 return; 2643 } 2644 #endif 2645 2646 #ifdef ENABLE_BLE 2647 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2648 if ((hci_stack->state == HCI_STATE_WORKING) 2649 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2650 2651 #ifdef ENABLE_LE_CENTRAL 2652 // handle le scan 2653 switch(hci_stack->le_scanning_state){ 2654 case LE_START_SCAN: 2655 hci_stack->le_scanning_state = LE_SCANNING; 2656 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2657 return; 2658 2659 case LE_STOP_SCAN: 2660 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2661 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2662 return; 2663 default: 2664 break; 2665 } 2666 if (hci_stack->le_scan_type != 0xff){ 2667 // defaults: active scanning, accept all advertisement packets 2668 int scan_type = hci_stack->le_scan_type; 2669 hci_stack->le_scan_type = 0xff; 2670 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); 2671 return; 2672 } 2673 #endif 2674 #ifdef ENABLE_LE_PERIPHERAL 2675 // le advertisement control 2676 if (hci_stack->le_advertisements_todo){ 2677 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2678 } 2679 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2680 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2681 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2682 return; 2683 } 2684 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2685 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2686 hci_send_cmd(&hci_le_set_advertising_parameters, 2687 hci_stack->le_advertisements_interval_min, 2688 hci_stack->le_advertisements_interval_max, 2689 hci_stack->le_advertisements_type, 2690 hci_stack->le_own_addr_type, 2691 hci_stack->le_advertisements_direct_address_type, 2692 hci_stack->le_advertisements_direct_address, 2693 hci_stack->le_advertisements_channel_map, 2694 hci_stack->le_advertisements_filter_policy); 2695 return; 2696 } 2697 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2698 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2699 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2700 return; 2701 } 2702 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2703 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2704 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2705 hci_stack->le_scan_response_data); 2706 return; 2707 } 2708 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2709 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2710 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2711 return; 2712 } 2713 #endif 2714 2715 #ifdef ENABLE_LE_CENTRAL 2716 // 2717 // LE Whitelist Management 2718 // 2719 2720 // check if whitelist needs modification 2721 btstack_linked_list_iterator_t lit; 2722 int modification_pending = 0; 2723 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2724 while (btstack_linked_list_iterator_has_next(&lit)){ 2725 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2726 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2727 modification_pending = 1; 2728 break; 2729 } 2730 } 2731 2732 if (modification_pending){ 2733 // stop connnecting if modification pending 2734 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2735 hci_send_cmd(&hci_le_create_connection_cancel); 2736 return; 2737 } 2738 2739 // add/remove entries 2740 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2741 while (btstack_linked_list_iterator_has_next(&lit)){ 2742 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2743 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2744 entry->state = LE_WHITELIST_ON_CONTROLLER; 2745 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2746 return; 2747 2748 } 2749 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2750 bd_addr_t address; 2751 bd_addr_type_t address_type = entry->address_type; 2752 memcpy(address, entry->address, 6); 2753 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2754 btstack_memory_whitelist_entry_free(entry); 2755 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2756 return; 2757 } 2758 } 2759 } 2760 2761 // start connecting 2762 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2763 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2764 bd_addr_t null_addr; 2765 memset(null_addr, 0, 6); 2766 hci_send_cmd(&hci_le_create_connection, 2767 0x0060, // scan interval: 60 ms 2768 0x0030, // scan interval: 30 ms 2769 1, // use whitelist 2770 0, // peer address type 2771 null_addr, // peer bd addr 2772 hci_stack->le_own_addr_type, // our addr type: 2773 0x0008, // conn interval min 2774 0x0018, // conn interval max 2775 0, // conn latency 2776 0x0048, // supervision timeout 2777 0x0001, // min ce length 2778 0x0001 // max ce length 2779 ); 2780 return; 2781 } 2782 #endif 2783 } 2784 #endif 2785 2786 // send pending HCI commands 2787 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2788 hci_connection_t * connection = (hci_connection_t *) it; 2789 2790 switch(connection->state){ 2791 case SEND_CREATE_CONNECTION: 2792 switch(connection->address_type){ 2793 #ifdef ENABLE_CLASSIC 2794 case BD_ADDR_TYPE_CLASSIC: 2795 log_info("sending hci_create_connection"); 2796 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2797 break; 2798 #endif 2799 default: 2800 #ifdef ENABLE_BLE 2801 #ifdef ENABLE_LE_CENTRAL 2802 log_info("sending hci_le_create_connection"); 2803 hci_send_cmd(&hci_le_create_connection, 2804 0x0060, // scan interval: 60 ms 2805 0x0030, // scan interval: 30 ms 2806 0, // don't use whitelist 2807 connection->address_type, // peer address type 2808 connection->address, // peer bd addr 2809 hci_stack->le_own_addr_type, // our addr type: 2810 0x0008, // conn interval min 2811 0x0018, // conn interval max 2812 0, // conn latency 2813 0x0048, // supervision timeout 2814 0x0001, // min ce length 2815 0x0001 // max ce length 2816 ); 2817 2818 connection->state = SENT_CREATE_CONNECTION; 2819 #endif 2820 #endif 2821 break; 2822 } 2823 return; 2824 2825 #ifdef ENABLE_CLASSIC 2826 case RECEIVED_CONNECTION_REQUEST: 2827 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2828 connection->state = ACCEPTED_CONNECTION_REQUEST; 2829 connection->role = HCI_ROLE_SLAVE; 2830 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2831 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2832 } 2833 return; 2834 #endif 2835 2836 #ifdef ENABLE_BLE 2837 #ifdef ENABLE_LE_CENTRAL 2838 case SEND_CANCEL_CONNECTION: 2839 connection->state = SENT_CANCEL_CONNECTION; 2840 hci_send_cmd(&hci_le_create_connection_cancel); 2841 return; 2842 #endif 2843 #endif 2844 case SEND_DISCONNECT: 2845 connection->state = SENT_DISCONNECT; 2846 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2847 return; 2848 2849 default: 2850 break; 2851 } 2852 2853 #ifdef ENABLE_CLASSIC 2854 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2855 log_info("responding to link key request"); 2856 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2857 link_key_t link_key; 2858 link_key_type_t link_key_type; 2859 if ( hci_stack->link_key_db 2860 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2861 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2862 connection->link_key_type = link_key_type; 2863 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2864 } else { 2865 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2866 } 2867 return; 2868 } 2869 2870 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2871 log_info("denying to pin request"); 2872 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2873 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2874 return; 2875 } 2876 2877 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2878 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2879 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2880 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2881 // tweak authentication requirements 2882 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2883 if (connection->bonding_flags & BONDING_DEDICATED){ 2884 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2885 } 2886 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2887 authreq |= 1; 2888 } 2889 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2890 } else { 2891 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2892 } 2893 return; 2894 } 2895 2896 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2897 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2898 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2899 return; 2900 } 2901 2902 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2903 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2904 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2905 return; 2906 } 2907 2908 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2909 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2910 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2911 return; 2912 } 2913 2914 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2915 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2916 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2917 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2918 return; 2919 } 2920 2921 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2922 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2923 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2924 return; 2925 } 2926 2927 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2928 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2929 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2930 return; 2931 } 2932 #endif 2933 2934 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2935 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2936 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2937 return; 2938 } 2939 2940 #ifdef ENABLE_BLE 2941 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2942 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2943 2944 uint16_t connection_interval_min = connection->le_conn_interval_min; 2945 connection->le_conn_interval_min = 0; 2946 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2947 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2948 0x0000, 0xffff); 2949 } 2950 #endif 2951 } 2952 2953 hci_connection_t * connection; 2954 switch (hci_stack->state){ 2955 case HCI_STATE_INITIALIZING: 2956 hci_initializing_run(); 2957 break; 2958 2959 case HCI_STATE_HALTING: 2960 2961 log_info("HCI_STATE_HALTING"); 2962 2963 // free whitelist entries 2964 #ifdef ENABLE_BLE 2965 #ifdef ENABLE_LE_CENTRAL 2966 { 2967 btstack_linked_list_iterator_t lit; 2968 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2969 while (btstack_linked_list_iterator_has_next(&lit)){ 2970 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2971 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2972 btstack_memory_whitelist_entry_free(entry); 2973 } 2974 } 2975 #endif 2976 #endif 2977 // close all open connections 2978 connection = (hci_connection_t *) hci_stack->connections; 2979 if (connection){ 2980 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2981 if (!hci_can_send_command_packet_now()) return; 2982 2983 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2984 2985 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2986 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2987 2988 // ... which would be ignored anyway as we shutdown (free) the connection now 2989 hci_shutdown_connection(connection); 2990 2991 // finally, send the disconnect command 2992 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2993 return; 2994 } 2995 log_info("HCI_STATE_HALTING, calling off"); 2996 2997 // switch mode 2998 hci_power_control_off(); 2999 3000 log_info("HCI_STATE_HALTING, emitting state"); 3001 hci_emit_state(); 3002 log_info("HCI_STATE_HALTING, done"); 3003 break; 3004 3005 case HCI_STATE_FALLING_ASLEEP: 3006 switch(hci_stack->substate) { 3007 case HCI_FALLING_ASLEEP_DISCONNECT: 3008 log_info("HCI_STATE_FALLING_ASLEEP"); 3009 // close all open connections 3010 connection = (hci_connection_t *) hci_stack->connections; 3011 3012 #ifdef HAVE_PLATFORM_IPHONE_OS 3013 // don't close connections, if H4 supports power management 3014 if (btstack_control_iphone_power_management_enabled()){ 3015 connection = NULL; 3016 } 3017 #endif 3018 if (connection){ 3019 3020 // send disconnect 3021 if (!hci_can_send_command_packet_now()) return; 3022 3023 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3024 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3025 3026 // send disconnected event right away - causes higher layer connections to get closed, too. 3027 hci_shutdown_connection(connection); 3028 return; 3029 } 3030 3031 if (hci_classic_supported()){ 3032 // disable page and inquiry scan 3033 if (!hci_can_send_command_packet_now()) return; 3034 3035 log_info("HCI_STATE_HALTING, disabling inq scans"); 3036 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3037 3038 // continue in next sub state 3039 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3040 break; 3041 } 3042 // no break - fall through for ble-only chips 3043 3044 case HCI_FALLING_ASLEEP_COMPLETE: 3045 log_info("HCI_STATE_HALTING, calling sleep"); 3046 #ifdef HAVE_PLATFORM_IPHONE_OS 3047 // don't actually go to sleep, if H4 supports power management 3048 if (btstack_control_iphone_power_management_enabled()){ 3049 // SLEEP MODE reached 3050 hci_stack->state = HCI_STATE_SLEEPING; 3051 hci_emit_state(); 3052 break; 3053 } 3054 #endif 3055 // switch mode 3056 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3057 hci_emit_state(); 3058 break; 3059 3060 default: 3061 break; 3062 } 3063 break; 3064 3065 default: 3066 break; 3067 } 3068 } 3069 3070 int hci_send_cmd_packet(uint8_t *packet, int size){ 3071 // house-keeping 3072 3073 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3074 hci_stack->loopback_mode = packet[3]; 3075 } 3076 3077 #ifdef ENABLE_CLASSIC 3078 bd_addr_t addr; 3079 hci_connection_t * conn; 3080 3081 // create_connection? 3082 if (IS_COMMAND(packet, hci_create_connection)){ 3083 reverse_bd_addr(&packet[3], addr); 3084 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3085 3086 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3087 if (!conn){ 3088 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3089 if (!conn){ 3090 // notify client that alloc failed 3091 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3092 return 0; // don't sent packet to controller 3093 } 3094 conn->state = SEND_CREATE_CONNECTION; 3095 } 3096 log_info("conn state %u", conn->state); 3097 switch (conn->state){ 3098 // if connection active exists 3099 case OPEN: 3100 // and OPEN, emit connection complete command, don't send to controller 3101 hci_emit_connection_complete(addr, conn->con_handle, 0); 3102 return 0; 3103 case SEND_CREATE_CONNECTION: 3104 // connection created by hci, e.g. dedicated bonding 3105 break; 3106 default: 3107 // otherwise, just ignore as it is already in the open process 3108 return 0; 3109 } 3110 conn->state = SENT_CREATE_CONNECTION; 3111 } 3112 3113 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3114 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3115 } 3116 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3117 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3118 } 3119 3120 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3121 if (hci_stack->link_key_db){ 3122 reverse_bd_addr(&packet[3], addr); 3123 hci_stack->link_key_db->delete_link_key(addr); 3124 } 3125 } 3126 3127 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3128 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3129 reverse_bd_addr(&packet[3], addr); 3130 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3131 if (conn){ 3132 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3133 } 3134 } 3135 3136 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3137 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3138 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3139 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3140 reverse_bd_addr(&packet[3], addr); 3141 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3142 if (conn){ 3143 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3144 } 3145 } 3146 3147 #ifdef ENABLE_SCO_OVER_HCI 3148 // setup_synchronous_connection? Voice setting at offset 22 3149 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3150 // TODO: compare to current setting if sco connection already active 3151 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3152 } 3153 // accept_synchronus_connection? Voice setting at offset 18 3154 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3155 // TODO: compare to current setting if sco connection already active 3156 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3157 } 3158 #endif 3159 #endif 3160 3161 #ifdef ENABLE_BLE 3162 #ifdef ENABLE_LE_PERIPHERAL 3163 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3164 hci_stack->le_random_address_set = 1; 3165 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3166 } 3167 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3168 hci_stack->le_advertisements_active = packet[3]; 3169 } 3170 #endif 3171 #ifdef ENABLE_LE_CENTRAL 3172 if (IS_COMMAND(packet, hci_le_create_connection)){ 3173 // white list used? 3174 uint8_t initiator_filter_policy = packet[7]; 3175 switch (initiator_filter_policy){ 3176 case 0: 3177 // whitelist not used 3178 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3179 break; 3180 case 1: 3181 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3182 break; 3183 default: 3184 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3185 break; 3186 } 3187 } 3188 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3189 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3190 } 3191 #endif 3192 #endif 3193 3194 hci_stack->num_cmd_packets--; 3195 3196 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3197 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3198 3199 // release packet buffer for synchronous transport implementations 3200 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3201 hci_stack->hci_packet_buffer_reserved = 0; 3202 } 3203 3204 return err; 3205 } 3206 3207 // disconnect because of security block 3208 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3209 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3210 if (!connection) return; 3211 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3212 } 3213 3214 3215 // Configure Secure Simple Pairing 3216 3217 #ifdef ENABLE_CLASSIC 3218 3219 // enable will enable SSP during init 3220 void gap_ssp_set_enable(int enable){ 3221 hci_stack->ssp_enable = enable; 3222 } 3223 3224 static int hci_local_ssp_activated(void){ 3225 return gap_ssp_supported() && hci_stack->ssp_enable; 3226 } 3227 3228 // if set, BTstack will respond to io capability request using authentication requirement 3229 void gap_ssp_set_io_capability(int io_capability){ 3230 hci_stack->ssp_io_capability = io_capability; 3231 } 3232 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3233 hci_stack->ssp_authentication_requirement = authentication_requirement; 3234 } 3235 3236 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3237 void gap_ssp_set_auto_accept(int auto_accept){ 3238 hci_stack->ssp_auto_accept = auto_accept; 3239 } 3240 #endif 3241 3242 // va_list part of hci_send_cmd 3243 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3244 if (!hci_can_send_command_packet_now()){ 3245 log_error("hci_send_cmd called but cannot send packet now"); 3246 return 0; 3247 } 3248 3249 // for HCI INITIALIZATION 3250 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3251 hci_stack->last_cmd_opcode = cmd->opcode; 3252 3253 hci_reserve_packet_buffer(); 3254 uint8_t * packet = hci_stack->hci_packet_buffer; 3255 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3256 return hci_send_cmd_packet(packet, size); 3257 } 3258 3259 /** 3260 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3261 */ 3262 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3263 va_list argptr; 3264 va_start(argptr, cmd); 3265 int res = hci_send_cmd_va_arg(cmd, argptr); 3266 va_end(argptr); 3267 return res; 3268 } 3269 3270 // Create various non-HCI events. 3271 // TODO: generalize, use table similar to hci_create_command 3272 3273 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3274 // dump packet 3275 if (dump) { 3276 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3277 } 3278 3279 // dispatch to all event handlers 3280 btstack_linked_list_iterator_t it; 3281 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3282 while (btstack_linked_list_iterator_has_next(&it)){ 3283 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3284 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3285 } 3286 } 3287 3288 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3289 if (!hci_stack->acl_packet_handler) return; 3290 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3291 } 3292 3293 #ifdef ENABLE_CLASSIC 3294 static void hci_notify_if_sco_can_send_now(void){ 3295 // notify SCO sender if waiting 3296 if (!hci_stack->sco_waiting_for_can_send_now) return; 3297 if (hci_can_send_sco_packet_now()){ 3298 hci_stack->sco_waiting_for_can_send_now = 0; 3299 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3300 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3301 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3302 } 3303 } 3304 #endif 3305 3306 void hci_emit_state(void){ 3307 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3308 uint8_t event[3]; 3309 event[0] = BTSTACK_EVENT_STATE; 3310 event[1] = sizeof(event) - 2; 3311 event[2] = hci_stack->state; 3312 hci_emit_event(event, sizeof(event), 1); 3313 } 3314 3315 #ifdef ENABLE_CLASSIC 3316 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3317 uint8_t event[13]; 3318 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3319 event[1] = sizeof(event) - 2; 3320 event[2] = status; 3321 little_endian_store_16(event, 3, con_handle); 3322 reverse_bd_addr(address, &event[5]); 3323 event[11] = 1; // ACL connection 3324 event[12] = 0; // encryption disabled 3325 hci_emit_event(event, sizeof(event), 1); 3326 } 3327 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3328 if (disable_l2cap_timeouts) return; 3329 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3330 uint8_t event[4]; 3331 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3332 event[1] = sizeof(event) - 2; 3333 little_endian_store_16(event, 2, conn->con_handle); 3334 hci_emit_event(event, sizeof(event), 1); 3335 } 3336 #endif 3337 3338 #ifdef ENABLE_BLE 3339 #ifdef ENABLE_LE_CENTRAL 3340 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3341 uint8_t event[21]; 3342 event[0] = HCI_EVENT_LE_META; 3343 event[1] = sizeof(event) - 2; 3344 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3345 event[3] = status; 3346 little_endian_store_16(event, 4, con_handle); 3347 event[6] = 0; // TODO: role 3348 event[7] = address_type; 3349 reverse_bd_addr(address, &event[8]); 3350 little_endian_store_16(event, 14, 0); // interval 3351 little_endian_store_16(event, 16, 0); // latency 3352 little_endian_store_16(event, 18, 0); // supervision timeout 3353 event[20] = 0; // master clock accuracy 3354 hci_emit_event(event, sizeof(event), 1); 3355 } 3356 #endif 3357 #endif 3358 3359 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3360 uint8_t event[6]; 3361 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3362 event[1] = sizeof(event) - 2; 3363 event[2] = 0; // status = OK 3364 little_endian_store_16(event, 3, con_handle); 3365 event[5] = reason; 3366 hci_emit_event(event, sizeof(event), 1); 3367 } 3368 3369 static void hci_emit_nr_connections_changed(void){ 3370 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3371 uint8_t event[3]; 3372 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3373 event[1] = sizeof(event) - 2; 3374 event[2] = nr_hci_connections(); 3375 hci_emit_event(event, sizeof(event), 1); 3376 } 3377 3378 static void hci_emit_hci_open_failed(void){ 3379 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3380 uint8_t event[2]; 3381 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3382 event[1] = sizeof(event) - 2; 3383 hci_emit_event(event, sizeof(event), 1); 3384 } 3385 3386 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3387 log_info("hci_emit_dedicated_bonding_result %u ", status); 3388 uint8_t event[9]; 3389 int pos = 0; 3390 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3391 event[pos++] = sizeof(event) - 2; 3392 event[pos++] = status; 3393 reverse_bd_addr(address, &event[pos]); 3394 hci_emit_event(event, sizeof(event), 1); 3395 } 3396 3397 3398 #ifdef ENABLE_CLASSIC 3399 3400 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3401 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3402 uint8_t event[5]; 3403 int pos = 0; 3404 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3405 event[pos++] = sizeof(event) - 2; 3406 little_endian_store_16(event, 2, con_handle); 3407 pos += 2; 3408 event[pos++] = level; 3409 hci_emit_event(event, sizeof(event), 1); 3410 } 3411 3412 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3413 if (!connection) return LEVEL_0; 3414 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3415 return gap_security_level_for_link_key_type(connection->link_key_type); 3416 } 3417 3418 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3419 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3420 uint8_t event[3]; 3421 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3422 event[1] = sizeof(event) - 2; 3423 event[2] = enabled; 3424 hci_emit_event(event, sizeof(event), 1); 3425 } 3426 3427 #ifdef ENABLE_CLASSIC 3428 // query if remote side supports eSCO 3429 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3430 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3431 if (!connection) return 0; 3432 return connection->remote_supported_feature_eSCO; 3433 } 3434 3435 // query if remote side supports SSP 3436 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3437 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3438 if (!connection) return 0; 3439 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3440 } 3441 3442 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3443 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3444 } 3445 #endif 3446 3447 // GAP API 3448 /** 3449 * @bbrief enable/disable bonding. default is enabled 3450 * @praram enabled 3451 */ 3452 void gap_set_bondable_mode(int enable){ 3453 hci_stack->bondable = enable ? 1 : 0; 3454 } 3455 /** 3456 * @brief Get bondable mode. 3457 * @return 1 if bondable 3458 */ 3459 int gap_get_bondable_mode(void){ 3460 return hci_stack->bondable; 3461 } 3462 3463 /** 3464 * @brief map link keys to security levels 3465 */ 3466 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3467 switch (link_key_type){ 3468 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3469 return LEVEL_4; 3470 case COMBINATION_KEY: 3471 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3472 return LEVEL_3; 3473 default: 3474 return LEVEL_2; 3475 } 3476 } 3477 3478 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3479 log_info("gap_mitm_protection_required_for_security_level %u", level); 3480 return level > LEVEL_2; 3481 } 3482 3483 /** 3484 * @brief get current security level 3485 */ 3486 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3487 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3488 if (!connection) return LEVEL_0; 3489 return gap_security_level_for_connection(connection); 3490 } 3491 3492 /** 3493 * @brief request connection to device to 3494 * @result GAP_AUTHENTICATION_RESULT 3495 */ 3496 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3497 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3498 if (!connection){ 3499 hci_emit_security_level(con_handle, LEVEL_0); 3500 return; 3501 } 3502 gap_security_level_t current_level = gap_security_level(con_handle); 3503 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3504 if (current_level >= requested_level){ 3505 hci_emit_security_level(con_handle, current_level); 3506 return; 3507 } 3508 3509 connection->requested_security_level = requested_level; 3510 3511 #if 0 3512 // sending encryption request without a link key results in an error. 3513 // TODO: figure out how to use it properly 3514 3515 // would enabling ecnryption suffice (>= LEVEL_2)? 3516 if (hci_stack->link_key_db){ 3517 link_key_type_t link_key_type; 3518 link_key_t link_key; 3519 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3520 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3521 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3522 return; 3523 } 3524 } 3525 } 3526 #endif 3527 3528 // try to authenticate connection 3529 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3530 hci_run(); 3531 } 3532 3533 /** 3534 * @brief start dedicated bonding with device. disconnect after bonding 3535 * @param device 3536 * @param request MITM protection 3537 * @result GAP_DEDICATED_BONDING_COMPLETE 3538 */ 3539 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3540 3541 // create connection state machine 3542 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3543 3544 if (!connection){ 3545 return BTSTACK_MEMORY_ALLOC_FAILED; 3546 } 3547 3548 // delete linkn key 3549 gap_drop_link_key_for_bd_addr(device); 3550 3551 // configure LEVEL_2/3, dedicated bonding 3552 connection->state = SEND_CREATE_CONNECTION; 3553 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3554 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3555 connection->bonding_flags = BONDING_DEDICATED; 3556 3557 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3558 3559 // handle: connnection failure (connection complete != ok) 3560 // handle: authentication failure 3561 // handle: disconnect on done 3562 3563 hci_run(); 3564 3565 return 0; 3566 } 3567 #endif 3568 3569 void gap_set_local_name(const char * local_name){ 3570 hci_stack->local_name = local_name; 3571 } 3572 3573 3574 #ifdef ENABLE_BLE 3575 3576 #ifdef ENABLE_LE_CENTRAL 3577 void gap_start_scan(void){ 3578 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3579 hci_stack->le_scanning_state = LE_START_SCAN; 3580 hci_run(); 3581 } 3582 3583 void gap_stop_scan(void){ 3584 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3585 hci_stack->le_scanning_state = LE_STOP_SCAN; 3586 hci_run(); 3587 } 3588 3589 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3590 hci_stack->le_scan_type = scan_type; 3591 hci_stack->le_scan_interval = scan_interval; 3592 hci_stack->le_scan_window = scan_window; 3593 hci_run(); 3594 } 3595 3596 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3597 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3598 if (!conn){ 3599 log_info("gap_connect: no connection exists yet, creating context"); 3600 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3601 if (!conn){ 3602 // notify client that alloc failed 3603 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3604 log_info("gap_connect: failed to alloc hci_connection_t"); 3605 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3606 } 3607 conn->state = SEND_CREATE_CONNECTION; 3608 log_info("gap_connect: send create connection next"); 3609 hci_run(); 3610 return 0; 3611 } 3612 3613 if (!hci_is_le_connection(conn) || 3614 conn->state == SEND_CREATE_CONNECTION || 3615 conn->state == SENT_CREATE_CONNECTION) { 3616 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3617 log_error("gap_connect: classic connection or connect is already being created"); 3618 return GATT_CLIENT_IN_WRONG_STATE; 3619 } 3620 3621 log_info("gap_connect: context exists with state %u", conn->state); 3622 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3623 hci_run(); 3624 return 0; 3625 } 3626 3627 // @assumption: only a single outgoing LE Connection exists 3628 static hci_connection_t * gap_get_outgoing_connection(void){ 3629 btstack_linked_item_t *it; 3630 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3631 hci_connection_t * conn = (hci_connection_t *) it; 3632 if (!hci_is_le_connection(conn)) continue; 3633 switch (conn->state){ 3634 case SEND_CREATE_CONNECTION: 3635 case SENT_CREATE_CONNECTION: 3636 return conn; 3637 default: 3638 break; 3639 }; 3640 } 3641 return NULL; 3642 } 3643 3644 uint8_t gap_connect_cancel(void){ 3645 hci_connection_t * conn = gap_get_outgoing_connection(); 3646 if (!conn) return 0; 3647 switch (conn->state){ 3648 case SEND_CREATE_CONNECTION: 3649 // skip sending create connection and emit event instead 3650 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3651 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3652 btstack_memory_hci_connection_free( conn ); 3653 break; 3654 case SENT_CREATE_CONNECTION: 3655 // request to send cancel connection 3656 conn->state = SEND_CANCEL_CONNECTION; 3657 hci_run(); 3658 break; 3659 default: 3660 break; 3661 } 3662 return 0; 3663 } 3664 #endif 3665 3666 /** 3667 * @brief Updates the connection parameters for a given LE connection 3668 * @param handle 3669 * @param conn_interval_min (unit: 1.25ms) 3670 * @param conn_interval_max (unit: 1.25ms) 3671 * @param conn_latency 3672 * @param supervision_timeout (unit: 10ms) 3673 * @returns 0 if ok 3674 */ 3675 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3676 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3677 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3678 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3679 connection->le_conn_interval_min = conn_interval_min; 3680 connection->le_conn_interval_max = conn_interval_max; 3681 connection->le_conn_latency = conn_latency; 3682 connection->le_supervision_timeout = supervision_timeout; 3683 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3684 hci_run(); 3685 return 0; 3686 } 3687 3688 /** 3689 * @brief Request an update of the connection parameter for a given LE connection 3690 * @param handle 3691 * @param conn_interval_min (unit: 1.25ms) 3692 * @param conn_interval_max (unit: 1.25ms) 3693 * @param conn_latency 3694 * @param supervision_timeout (unit: 10ms) 3695 * @returns 0 if ok 3696 */ 3697 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3698 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3699 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3700 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3701 connection->le_conn_interval_min = conn_interval_min; 3702 connection->le_conn_interval_max = conn_interval_max; 3703 connection->le_conn_latency = conn_latency; 3704 connection->le_supervision_timeout = supervision_timeout; 3705 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3706 hci_run(); 3707 return 0; 3708 } 3709 3710 #ifdef ENABLE_LE_PERIPHERAL 3711 3712 static void gap_advertisments_changed(void){ 3713 // disable advertisements before updating adv, scan data, or adv params 3714 if (hci_stack->le_advertisements_active){ 3715 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3716 } 3717 hci_run(); 3718 } 3719 3720 /** 3721 * @brief Set Advertisement Data 3722 * @param advertising_data_length 3723 * @param advertising_data (max 31 octets) 3724 * @note data is not copied, pointer has to stay valid 3725 */ 3726 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3727 hci_stack->le_advertisements_data_len = advertising_data_length; 3728 hci_stack->le_advertisements_data = advertising_data; 3729 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3730 gap_advertisments_changed(); 3731 } 3732 3733 /** 3734 * @brief Set Scan Response Data 3735 * @param advertising_data_length 3736 * @param advertising_data (max 31 octets) 3737 * @note data is not copied, pointer has to stay valid 3738 */ 3739 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3740 hci_stack->le_scan_response_data_len = scan_response_data_length; 3741 hci_stack->le_scan_response_data = scan_response_data; 3742 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3743 gap_advertisments_changed(); 3744 } 3745 3746 /** 3747 * @brief Set Advertisement Parameters 3748 * @param adv_int_min 3749 * @param adv_int_max 3750 * @param adv_type 3751 * @param direct_address_type 3752 * @param direct_address 3753 * @param channel_map 3754 * @param filter_policy 3755 * 3756 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3757 */ 3758 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3759 uint8_t direct_address_typ, bd_addr_t direct_address, 3760 uint8_t channel_map, uint8_t filter_policy) { 3761 3762 hci_stack->le_advertisements_interval_min = adv_int_min; 3763 hci_stack->le_advertisements_interval_max = adv_int_max; 3764 hci_stack->le_advertisements_type = adv_type; 3765 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3766 hci_stack->le_advertisements_channel_map = channel_map; 3767 hci_stack->le_advertisements_filter_policy = filter_policy; 3768 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3769 3770 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3771 gap_advertisments_changed(); 3772 } 3773 3774 /** 3775 * @brief Enable/Disable Advertisements 3776 * @param enabled 3777 */ 3778 void gap_advertisements_enable(int enabled){ 3779 hci_stack->le_advertisements_enabled = enabled; 3780 if (enabled && !hci_stack->le_advertisements_active){ 3781 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3782 } 3783 if (!enabled && hci_stack->le_advertisements_active){ 3784 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3785 } 3786 hci_run(); 3787 } 3788 3789 #endif 3790 3791 void hci_le_set_own_address_type(uint8_t own_address_type){ 3792 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3793 if (own_address_type == hci_stack->le_own_addr_type) return; 3794 hci_stack->le_own_addr_type = own_address_type; 3795 3796 #ifdef ENABLE_LE_PERIPHERAL 3797 // update advertisement parameters, too 3798 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3799 gap_advertisments_changed(); 3800 #endif 3801 #ifdef ENABLE_LE_CENTRAL 3802 // note: we don't update scan parameters or modify ongoing connection attempts 3803 #endif 3804 } 3805 3806 #endif 3807 3808 uint8_t gap_disconnect(hci_con_handle_t handle){ 3809 hci_connection_t * conn = hci_connection_for_handle(handle); 3810 if (!conn){ 3811 hci_emit_disconnection_complete(handle, 0); 3812 return 0; 3813 } 3814 conn->state = SEND_DISCONNECT; 3815 hci_run(); 3816 return 0; 3817 } 3818 3819 /** 3820 * @brief Get connection type 3821 * @param con_handle 3822 * @result connection_type 3823 */ 3824 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3825 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3826 if (!conn) return GAP_CONNECTION_INVALID; 3827 switch (conn->address_type){ 3828 case BD_ADDR_TYPE_LE_PUBLIC: 3829 case BD_ADDR_TYPE_LE_RANDOM: 3830 return GAP_CONNECTION_LE; 3831 case BD_ADDR_TYPE_SCO: 3832 return GAP_CONNECTION_SCO; 3833 case BD_ADDR_TYPE_CLASSIC: 3834 return GAP_CONNECTION_ACL; 3835 default: 3836 return GAP_CONNECTION_INVALID; 3837 } 3838 } 3839 3840 #ifdef ENABLE_BLE 3841 3842 #ifdef ENABLE_LE_CENTRAL 3843 /** 3844 * @brief Auto Connection Establishment - Start Connecting to device 3845 * @param address_typ 3846 * @param address 3847 * @returns 0 if ok 3848 */ 3849 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3850 // check capacity 3851 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3852 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3853 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3854 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3855 entry->address_type = address_type; 3856 memcpy(entry->address, address, 6); 3857 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3858 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3859 hci_run(); 3860 return 0; 3861 } 3862 3863 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3864 btstack_linked_list_iterator_t it; 3865 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3866 while (btstack_linked_list_iterator_has_next(&it)){ 3867 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3868 if (entry->address_type != address_type) continue; 3869 if (memcmp(entry->address, address, 6) != 0) continue; 3870 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3871 // remove from controller if already present 3872 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3873 continue; 3874 } 3875 // direclty remove entry from whitelist 3876 btstack_linked_list_iterator_remove(&it); 3877 btstack_memory_whitelist_entry_free(entry); 3878 } 3879 } 3880 3881 /** 3882 * @brief Auto Connection Establishment - Stop Connecting to device 3883 * @param address_typ 3884 * @param address 3885 * @returns 0 if ok 3886 */ 3887 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3888 hci_remove_from_whitelist(address_type, address); 3889 hci_run(); 3890 return 0; 3891 } 3892 3893 /** 3894 * @brief Auto Connection Establishment - Stop everything 3895 * @note Convenience function to stop all active auto connection attempts 3896 */ 3897 void gap_auto_connection_stop_all(void){ 3898 btstack_linked_list_iterator_t it; 3899 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3900 while (btstack_linked_list_iterator_has_next(&it)){ 3901 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3902 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3903 // remove from controller if already present 3904 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3905 continue; 3906 } 3907 // directly remove entry from whitelist 3908 btstack_linked_list_iterator_remove(&it); 3909 btstack_memory_whitelist_entry_free(entry); 3910 } 3911 hci_run(); 3912 } 3913 #endif 3914 #endif 3915 3916 #ifdef ENABLE_CLASSIC 3917 /** 3918 * @brief Set Extended Inquiry Response data 3919 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3920 * @note has to be done before stack starts up 3921 */ 3922 void gap_set_extended_inquiry_response(const uint8_t * data){ 3923 hci_stack->eir_data = data; 3924 } 3925 3926 /** 3927 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3928 * @param inquriy_mode see bluetooth_defines.h 3929 */ 3930 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3931 hci_stack->inquiry_mode = mode; 3932 } 3933 3934 /** 3935 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3936 */ 3937 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3938 hci_stack->sco_voice_setting = voice_setting; 3939 } 3940 3941 /** 3942 * @brief Get SCO Voice Setting 3943 * @return current voice setting 3944 */ 3945 uint16_t hci_get_sco_voice_setting(void){ 3946 return hci_stack->sco_voice_setting; 3947 } 3948 3949 /** @brief Get SCO packet length for current SCO Voice setting 3950 * @note Using SCO packets of the exact length is required for USB transfer 3951 * @return Length of SCO packets in bytes (not audio frames) 3952 */ 3953 int hci_get_sco_packet_length(void){ 3954 // see Core Spec for H2 USB Transfer. 3955 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3956 return 27; 3957 } 3958 #endif 3959 3960 /** 3961 * @brief Set callback for Bluetooth Hardware Error 3962 */ 3963 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3964 hci_stack->hardware_error_callback = fn; 3965 } 3966 3967 void hci_disconnect_all(void){ 3968 btstack_linked_list_iterator_t it; 3969 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3970 while (btstack_linked_list_iterator_has_next(&it)){ 3971 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3972 if (con->state == SENT_DISCONNECT) continue; 3973 con->state = SEND_DISCONNECT; 3974 } 3975 hci_run(); 3976 } 3977 3978 uint16_t hci_get_manufacturer(void){ 3979 return hci_stack->manufacturer; 3980 } 3981