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