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