1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef HAVE_TICK 49 #include "btstack_run_loop_embedded.h" 50 #endif 51 52 #ifdef HAVE_PLATFORM_IPHONE_OS 53 #include "../port/ios/src/btstack_control_iphone.h" 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #endif 59 60 #include <stdarg.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_linked_list.h" 67 #include "btstack_memory.h" 68 #include "gap.h" 69 #include "hci.h" 70 #include "hci_cmd.h" 71 #include "hci_dump.h" 72 73 74 #define HCI_CONNECTION_TIMEOUT_MS 10000 75 76 // prototypes 77 static void hci_update_scan_enable(void); 78 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 79 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 80 static void hci_connection_timestamp(hci_connection_t *connection); 81 static int hci_power_control_on(void); 82 static void hci_power_control_off(void); 83 static void hci_state_reset(void); 84 static void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status); 85 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 86 static void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason); 87 static void hci_emit_nr_connections_changed(void); 88 static void hci_emit_hci_open_failed(void); 89 static void hci_emit_discoverable_enabled(uint8_t enabled); 90 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 91 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 92 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 93 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 94 static void hci_notify_if_sco_can_send_now(void); 95 static void hci_run(void); 96 static int hci_is_le_connection(hci_connection_t * connection); 97 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 98 static int hci_local_ssp_activated(void); 99 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 100 101 #ifdef ENABLE_BLE 102 // called from test/ble_client/advertising_data_parser.c 103 void le_handle_advertisement_report(uint8_t *packet, int size); 104 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 105 #endif 106 107 // the STACK is here 108 #ifndef HAVE_MALLOC 109 static hci_stack_t hci_stack_static; 110 #endif 111 static hci_stack_t * hci_stack = NULL; 112 113 // test helper 114 static uint8_t disable_l2cap_timeouts = 0; 115 116 /** 117 * create connection for given address 118 * 119 * @return connection OR NULL, if no memory left 120 */ 121 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 122 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 123 hci_connection_t * conn = btstack_memory_hci_connection_get(); 124 if (!conn) return NULL; 125 memset(conn, 0, sizeof(hci_connection_t)); 126 bd_addr_copy(conn->address, addr); 127 conn->address_type = addr_type; 128 conn->con_handle = 0xffff; 129 conn->authentication_flags = AUTH_FLAGS_NONE; 130 conn->bonding_flags = 0; 131 conn->requested_security_level = LEVEL_0; 132 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 133 btstack_run_loop_set_timer_context(&conn->timeout, conn); 134 hci_connection_timestamp(conn); 135 conn->acl_recombination_length = 0; 136 conn->acl_recombination_pos = 0; 137 conn->num_acl_packets_sent = 0; 138 conn->num_sco_packets_sent = 0; 139 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 140 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 141 return conn; 142 } 143 144 145 /** 146 * get le connection parameter range 147 * 148 * @return le connection parameter range struct 149 */ 150 void gap_get_connection_parameter_range(le_connection_parameter_range_t range){ 151 range = hci_stack->le_connection_parameter_range; 152 } 153 154 /** 155 * set le connection parameter range 156 * 157 */ 158 159 void gap_set_connection_parameter_range(le_connection_parameter_range_t range){ 160 hci_stack->le_connection_parameter_range = range; 161 } 162 163 /** 164 * get hci connections iterator 165 * 166 * @return hci connections iterator 167 */ 168 169 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 170 btstack_linked_list_iterator_init(it, &hci_stack->connections); 171 } 172 173 /** 174 * get connection for a given handle 175 * 176 * @return connection OR NULL, if not found 177 */ 178 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 179 btstack_linked_list_iterator_t it; 180 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 181 while (btstack_linked_list_iterator_has_next(&it)){ 182 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 183 if ( item->con_handle == con_handle ) { 184 return item; 185 } 186 } 187 return NULL; 188 } 189 190 /** 191 * get connection for given address 192 * 193 * @return connection OR NULL, if not found 194 */ 195 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 196 btstack_linked_list_iterator_t it; 197 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 198 while (btstack_linked_list_iterator_has_next(&it)){ 199 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 200 if (connection->address_type != addr_type) continue; 201 if (memcmp(addr, connection->address, 6) != 0) continue; 202 return connection; 203 } 204 return NULL; 205 } 206 207 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 208 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 209 #ifdef HAVE_TIME 210 struct timeval tv; 211 gettimeofday(&tv, NULL); 212 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 213 // connections might be timed out 214 hci_emit_l2cap_check_timeout(connection); 215 } 216 #endif 217 #ifdef HAVE_TICK 218 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 219 // connections might be timed out 220 hci_emit_l2cap_check_timeout(connection); 221 } 222 #endif 223 #ifdef HAVE_TIME_MS 224 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 225 // connections might be timed out 226 hci_emit_l2cap_check_timeout(connection); 227 } 228 #endif 229 btstack_run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 230 btstack_run_loop_add_timer(timer); 231 } 232 233 static void hci_connection_timestamp(hci_connection_t *connection){ 234 #ifdef HAVE_TIME 235 gettimeofday(&connection->timestamp, NULL); 236 #endif 237 #ifdef HAVE_TICK 238 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 239 #endif 240 #ifdef HAVE_TIME_MS 241 connection->timestamp = btstack_run_loop_get_time_ms(); 242 #endif 243 } 244 245 246 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 247 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 248 } 249 250 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 251 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 252 } 253 254 255 /** 256 * add authentication flags and reset timer 257 * @note: assumes classic connection 258 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 259 */ 260 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 261 bd_addr_t addr; 262 reverse_bd_addr(bd_addr, addr); 263 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 264 if (conn) { 265 connectionSetAuthenticationFlags(conn, flags); 266 hci_connection_timestamp(conn); 267 } 268 } 269 270 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 271 hci_connection_t * conn = hci_connection_for_handle(handle); 272 if (!conn) return 0; 273 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 274 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 275 return 0; 276 } 277 278 void hci_drop_link_key_for_bd_addr(bd_addr_t addr){ 279 if (hci_stack->link_key_db) { 280 hci_stack->link_key_db->delete_link_key(addr); 281 } 282 } 283 284 static int hci_is_le_connection(hci_connection_t * connection){ 285 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 286 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 287 } 288 289 290 /** 291 * count connections 292 */ 293 static int nr_hci_connections(void){ 294 int count = 0; 295 btstack_linked_item_t *it; 296 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 297 return count; 298 } 299 300 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 301 302 int num_packets_sent_classic = 0; 303 int num_packets_sent_le = 0; 304 305 btstack_linked_item_t *it; 306 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 307 hci_connection_t * connection = (hci_connection_t *) it; 308 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 309 num_packets_sent_classic += connection->num_acl_packets_sent; 310 } else { 311 num_packets_sent_le += connection->num_acl_packets_sent; 312 } 313 } 314 315 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 316 int free_slots_le = 0; 317 318 if (free_slots_classic < 0){ 319 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); 320 return 0; 321 } 322 323 if (hci_stack->le_acl_packets_total_num){ 324 // if we have LE slots, they are used 325 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 326 if (free_slots_le < 0){ 327 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); 328 return 0; 329 } 330 } else { 331 // otherwise, classic slots are used for LE, too 332 free_slots_classic -= num_packets_sent_le; 333 if (free_slots_classic < 0){ 334 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); 335 return 0; 336 } 337 } 338 339 switch (address_type){ 340 case BD_ADDR_TYPE_UNKNOWN: 341 log_error("hci_number_free_acl_slots: unknown address type"); 342 return 0; 343 344 case BD_ADDR_TYPE_CLASSIC: 345 return free_slots_classic; 346 347 default: 348 if (hci_stack->le_acl_packets_total_num){ 349 return free_slots_le; 350 } 351 return free_slots_classic; 352 } 353 } 354 355 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 356 // get connection type 357 hci_connection_t * connection = hci_connection_for_handle(con_handle); 358 if (!connection){ 359 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 360 return 0; 361 } 362 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 363 } 364 365 static int hci_number_free_sco_slots(void){ 366 int num_sco_packets_sent = 0; 367 btstack_linked_item_t *it; 368 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 369 hci_connection_t * connection = (hci_connection_t *) it; 370 num_sco_packets_sent += connection->num_sco_packets_sent; 371 } 372 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 373 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 374 return 0; 375 } 376 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 377 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 378 } 379 380 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 381 int hci_can_send_command_packet_now(void){ 382 if (hci_stack->hci_packet_buffer_reserved) return 0; 383 384 // check for async hci transport implementations 385 if (hci_stack->hci_transport->can_send_packet_now){ 386 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 387 return 0; 388 } 389 } 390 391 return hci_stack->num_cmd_packets > 0; 392 } 393 394 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 395 // check for async hci transport implementations 396 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 397 return hci_stack->hci_transport->can_send_packet_now(packet_type); 398 } 399 400 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 401 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 402 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 403 } 404 405 int hci_can_send_acl_classic_packet_now(void){ 406 if (hci_stack->hci_packet_buffer_reserved) return 0; 407 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 408 } 409 410 int hci_can_send_acl_le_packet_now(void){ 411 if (hci_stack->hci_packet_buffer_reserved) return 0; 412 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 413 } 414 415 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 416 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 417 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 418 } 419 420 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 421 if (hci_stack->hci_packet_buffer_reserved) return 0; 422 return hci_can_send_prepared_acl_packet_now(con_handle); 423 } 424 425 int hci_can_send_prepared_sco_packet_now(void){ 426 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) { 427 hci_stack->sco_waiting_for_can_send_now = 1; 428 return 0; 429 } 430 if (!hci_stack->synchronous_flow_control_enabled) return 1; 431 return hci_number_free_sco_slots() > 0; 432 } 433 434 int hci_can_send_sco_packet_now(void){ 435 if (hci_stack->hci_packet_buffer_reserved) { 436 hci_stack->sco_waiting_for_can_send_now = 1; 437 return 0; 438 } 439 return hci_can_send_prepared_sco_packet_now(); 440 } 441 442 // used for internal checks in l2cap.c 443 int hci_is_packet_buffer_reserved(void){ 444 return hci_stack->hci_packet_buffer_reserved; 445 } 446 447 // reserves outgoing packet buffer. @returns 1 if successful 448 int hci_reserve_packet_buffer(void){ 449 if (hci_stack->hci_packet_buffer_reserved) { 450 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 451 return 0; 452 } 453 hci_stack->hci_packet_buffer_reserved = 1; 454 return 1; 455 } 456 457 void hci_release_packet_buffer(void){ 458 hci_stack->hci_packet_buffer_reserved = 0; 459 } 460 461 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 462 static int hci_transport_synchronous(void){ 463 return hci_stack->hci_transport->can_send_packet_now == NULL; 464 } 465 466 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 467 468 // 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); 469 470 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 471 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 472 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 473 max_acl_data_packet_length = hci_stack->le_data_packets_length; 474 } 475 476 // testing: reduce buffer to minimum 477 // max_acl_data_packet_length = 52; 478 479 int err; 480 // multiple packets could be send on a synchronous HCI transport 481 while (1){ 482 483 // get current data 484 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 485 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 486 int more_fragments = 0; 487 488 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 489 if (current_acl_data_packet_length > max_acl_data_packet_length){ 490 more_fragments = 1; 491 current_acl_data_packet_length = max_acl_data_packet_length; 492 } 493 494 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 495 if (acl_header_pos > 0){ 496 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 497 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 498 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 499 } 500 501 // update header len 502 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 503 504 // count packet 505 connection->num_acl_packets_sent++; 506 507 // send packet 508 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 509 const int size = current_acl_data_packet_length + 4; 510 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 511 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 512 513 // done yet? 514 if (!more_fragments) break; 515 516 // update start of next fragment to send 517 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 518 519 // can send more? 520 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 521 } 522 523 // done 524 hci_stack->acl_fragmentation_pos = 0; 525 hci_stack->acl_fragmentation_total_size = 0; 526 527 // release buffer now for synchronous transport 528 if (hci_transport_synchronous()){ 529 hci_release_packet_buffer(); 530 // notify upper stack that iit might be possible to send again 531 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 532 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 533 } 534 535 return err; 536 } 537 538 // pre: caller has reserved the packet buffer 539 int hci_send_acl_packet_buffer(int size){ 540 541 // log_info("hci_send_acl_packet_buffer size %u", size); 542 543 if (!hci_stack->hci_packet_buffer_reserved) { 544 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 545 return 0; 546 } 547 548 uint8_t * packet = hci_stack->hci_packet_buffer; 549 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 550 551 // check for free places on Bluetooth module 552 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 553 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 554 hci_release_packet_buffer(); 555 return BTSTACK_ACL_BUFFERS_FULL; 556 } 557 558 hci_connection_t *connection = hci_connection_for_handle( con_handle); 559 if (!connection) { 560 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 561 hci_release_packet_buffer(); 562 return 0; 563 } 564 hci_connection_timestamp(connection); 565 566 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 567 568 // setup data 569 hci_stack->acl_fragmentation_total_size = size; 570 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 571 572 return hci_send_acl_packet_fragments(connection); 573 } 574 575 // pre: caller has reserved the packet buffer 576 int hci_send_sco_packet_buffer(int size){ 577 578 // log_info("hci_send_acl_packet_buffer size %u", size); 579 580 if (!hci_stack->hci_packet_buffer_reserved) { 581 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 582 return 0; 583 } 584 585 uint8_t * packet = hci_stack->hci_packet_buffer; 586 587 // skip checks in loopback mode 588 if (!hci_stack->loopback_mode){ 589 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 590 591 // check for free places on Bluetooth module 592 if (!hci_can_send_prepared_sco_packet_now()) { 593 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 594 hci_release_packet_buffer(); 595 return BTSTACK_ACL_BUFFERS_FULL; 596 } 597 598 // track send packet in connection struct 599 hci_connection_t *connection = hci_connection_for_handle( con_handle); 600 if (!connection) { 601 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 602 hci_release_packet_buffer(); 603 return 0; 604 } 605 connection->num_sco_packets_sent++; 606 } 607 608 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 609 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 610 611 if (hci_transport_synchronous()){ 612 hci_release_packet_buffer(); 613 // notify upper stack that iit might be possible to send again 614 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 615 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 616 } 617 618 return err; 619 } 620 621 static void acl_handler(uint8_t *packet, int size){ 622 623 // log_info("acl_handler: size %u", size); 624 625 // get info 626 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 627 hci_connection_t *conn = hci_connection_for_handle(con_handle); 628 uint8_t acl_flags = READ_ACL_FLAGS(packet); 629 uint16_t acl_length = READ_ACL_LENGTH(packet); 630 631 // ignore non-registered handle 632 if (!conn){ 633 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 634 return; 635 } 636 637 // assert packet is complete 638 if (acl_length + 4 != size){ 639 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 640 return; 641 } 642 643 // update idle timestamp 644 hci_connection_timestamp(conn); 645 646 // handle different packet types 647 switch (acl_flags & 0x03) { 648 649 case 0x01: // continuation fragment 650 651 // sanity checks 652 if (conn->acl_recombination_pos == 0) { 653 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 654 return; 655 } 656 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 657 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 658 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 659 conn->acl_recombination_pos = 0; 660 return; 661 } 662 663 // append fragment payload (header already stored) 664 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 665 conn->acl_recombination_pos += acl_length; 666 667 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 668 // conn->acl_recombination_pos, conn->acl_recombination_length); 669 670 // forward complete L2CAP packet if complete. 671 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 672 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 673 // reset recombination buffer 674 conn->acl_recombination_length = 0; 675 conn->acl_recombination_pos = 0; 676 } 677 break; 678 679 case 0x02: { // first fragment 680 681 // sanity check 682 if (conn->acl_recombination_pos) { 683 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 684 conn->acl_recombination_pos = 0; 685 } 686 687 // peek into L2CAP packet! 688 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 689 690 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 691 692 // compare fragment size to L2CAP packet size 693 if (acl_length >= l2cap_length + 4){ 694 // forward fragment as L2CAP packet 695 hci_emit_acl_packet(packet, acl_length + 4); 696 } else { 697 698 if (acl_length > HCI_ACL_BUFFER_SIZE){ 699 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 700 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 701 return; 702 } 703 704 // store first fragment and tweak acl length for complete package 705 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 706 conn->acl_recombination_pos = acl_length + 4; 707 conn->acl_recombination_length = l2cap_length; 708 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 709 } 710 break; 711 712 } 713 default: 714 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 715 return; 716 } 717 718 // execute main loop 719 hci_run(); 720 } 721 722 static void hci_shutdown_connection(hci_connection_t *conn){ 723 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 724 725 btstack_run_loop_remove_timer(&conn->timeout); 726 727 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 728 btstack_memory_hci_connection_free( conn ); 729 730 // now it's gone 731 hci_emit_nr_connections_changed(); 732 } 733 734 static const uint16_t packet_type_sizes[] = { 735 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 736 HCI_ACL_DH1_SIZE, 0, 0, 0, 737 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 738 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 739 }; 740 static const uint8_t packet_type_feature_requirement_bit[] = { 741 0, // 3 slot packets 742 1, // 5 slot packets 743 25, // EDR 2 mpbs 744 26, // EDR 3 mbps 745 39, // 3 slot EDR packts 746 40, // 5 slot EDR packet 747 }; 748 static const uint16_t packet_type_feature_packet_mask[] = { 749 0x0f00, // 3 slot packets 750 0xf000, // 5 slot packets 751 0x1102, // EDR 2 mpbs 752 0x2204, // EDR 3 mbps 753 0x0300, // 3 slot EDR packts 754 0x3000, // 5 slot EDR packet 755 }; 756 757 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 758 // enable packet types based on size 759 uint16_t packet_types = 0; 760 unsigned int i; 761 for (i=0;i<16;i++){ 762 if (packet_type_sizes[i] == 0) continue; 763 if (packet_type_sizes[i] <= buffer_size){ 764 packet_types |= 1 << i; 765 } 766 } 767 // disable packet types due to missing local supported features 768 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 769 int bit_idx = packet_type_feature_requirement_bit[i]; 770 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 771 if (feature_set) continue; 772 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 773 packet_types &= ~packet_type_feature_packet_mask[i]; 774 } 775 // flip bits for "may not be used" 776 packet_types ^= 0x3306; 777 return packet_types; 778 } 779 780 uint16_t hci_usable_acl_packet_types(void){ 781 return hci_stack->packet_types; 782 } 783 784 uint8_t* hci_get_outgoing_packet_buffer(void){ 785 // hci packet buffer is >= acl data packet length 786 return hci_stack->hci_packet_buffer; 787 } 788 789 uint16_t hci_max_acl_data_packet_length(void){ 790 return hci_stack->acl_data_packet_length; 791 } 792 793 int hci_non_flushable_packet_boundary_flag_supported(void){ 794 // No. 54, byte 6, bit 6 795 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 796 } 797 798 static int hci_ssp_supported(void){ 799 // No. 51, byte 6, bit 3 800 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 801 } 802 803 static int hci_classic_supported(void){ 804 // No. 37, byte 4, bit 5, = No BR/EDR Support 805 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 806 } 807 808 static int hci_le_supported(void){ 809 #ifdef ENABLE_BLE 810 // No. 37, byte 4, bit 6 = LE Supported (Controller) 811 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 812 #else 813 return 0; 814 #endif 815 } 816 817 // get addr type and address used in advertisement packets 818 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t addr){ 819 *addr_type = hci_stack->adv_addr_type; 820 if (hci_stack->adv_addr_type){ 821 memcpy(addr, hci_stack->adv_address, 6); 822 } else { 823 memcpy(addr, hci_stack->local_bd_addr, 6); 824 } 825 } 826 827 #ifdef ENABLE_BLE 828 void le_handle_advertisement_report(uint8_t *packet, int size){ 829 int offset = 3; 830 int num_reports = packet[offset]; 831 offset += 1; 832 833 int i; 834 log_info("HCI: handle adv report with num reports: %d", num_reports); 835 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 836 for (i=0; i<num_reports;i++){ 837 uint8_t data_length = packet[offset + 8]; 838 uint8_t event_size = 10 + data_length; 839 int pos = 0; 840 event[pos++] = GAP_LE_EVENT_ADVERTISING_REPORT; 841 event[pos++] = event_size; 842 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 843 offset += 8; 844 pos += 8; 845 event[pos++] = packet[offset + 1 + data_length]; // rssi 846 event[pos++] = packet[offset++]; //data_length; 847 memcpy(&event[pos], &packet[offset], data_length); 848 pos += data_length; 849 offset += data_length + 1; // rssi 850 hci_emit_event(event, pos, 1); 851 } 852 } 853 #endif 854 855 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 856 if (!hci_stack->config) return 0; 857 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 858 // Limit baud rate for Broadcom chipsets to 3 mbps 859 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 860 baud_rate = 3000000; 861 } 862 return baud_rate; 863 } 864 865 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 866 switch (hci_stack->substate){ 867 case HCI_INIT_W4_SEND_RESET: 868 log_info("Resend HCI Reset"); 869 hci_stack->substate = HCI_INIT_SEND_RESET; 870 hci_stack->num_cmd_packets = 1; 871 hci_run(); 872 break; 873 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 874 log_info("Resend HCI Reset - CSR Warm Boot"); 875 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 876 hci_stack->num_cmd_packets = 1; 877 hci_run(); 878 break; 879 case HCI_INIT_W4_SEND_BAUD_CHANGE: { 880 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 881 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 882 hci_stack->hci_transport->set_baudrate(baud_rate); 883 // For CSR, HCI Reset is sent on new baud rate 884 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 885 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 886 hci_run(); 887 } 888 break; 889 } 890 default: 891 break; 892 } 893 } 894 895 static void hci_initializing_next_state(void){ 896 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 897 } 898 899 // assumption: hci_can_send_command_packet_now() == true 900 static void hci_initializing_run(void){ 901 log_info("hci_initializing_run: substate %u", hci_stack->substate); 902 switch (hci_stack->substate){ 903 case HCI_INIT_SEND_RESET: 904 hci_state_reset(); 905 906 #ifndef HAVE_PLATFORM_IPHONE_OS 907 // prepare reset if command complete not received in 100ms 908 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 909 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 910 btstack_run_loop_add_timer(&hci_stack->timeout); 911 #endif 912 // send command 913 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 914 hci_send_cmd(&hci_reset); 915 break; 916 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 917 hci_send_cmd(&hci_read_local_version_information); 918 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 919 break; 920 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 921 hci_state_reset(); 922 // prepare reset if command complete not received in 100ms 923 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 924 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 925 btstack_run_loop_add_timer(&hci_stack->timeout); 926 // send command 927 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 928 hci_send_cmd(&hci_reset); 929 break; 930 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 931 hci_state_reset(); 932 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 933 hci_send_cmd(&hci_reset); 934 break; 935 case HCI_INIT_SEND_BAUD_CHANGE: { 936 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 937 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 938 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 939 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 940 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 941 // STLC25000D: baudrate change happens within 0.5 s after command was send, 942 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 943 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 944 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 945 btstack_run_loop_add_timer(&hci_stack->timeout); 946 } 947 break; 948 } 949 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 950 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 951 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 952 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 953 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 954 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 955 break; 956 } 957 case HCI_INIT_CUSTOM_INIT: 958 log_info("Custom init"); 959 // Custom initialization 960 if (hci_stack->chipset && hci_stack->chipset->next_command){ 961 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 962 if (valid_cmd){ 963 int size = 3 + hci_stack->hci_packet_buffer[2]; 964 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 965 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 966 switch (valid_cmd) { 967 case 1: 968 default: 969 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 970 break; 971 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 972 log_info("CSR Warm Boot"); 973 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 974 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 975 btstack_run_loop_add_timer(&hci_stack->timeout); 976 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 977 && hci_stack->config 978 && hci_stack->chipset 979 // && hci_stack->chipset->set_baudrate_command -- there's no such command 980 && hci_stack->hci_transport->set_baudrate 981 && hci_transport_uart_get_main_baud_rate()){ 982 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 983 } else { 984 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 985 } 986 break; 987 } 988 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 989 break; 990 } 991 log_info("hci_run: init script done"); 992 993 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 994 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 995 int need_baud_change = hci_stack->config 996 && hci_stack->chipset 997 && hci_stack->chipset->set_baudrate_command 998 && hci_stack->hci_transport->set_baudrate 999 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1000 if (need_baud_change) { 1001 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1002 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1003 hci_stack->hci_transport->set_baudrate(baud_rate); 1004 } 1005 } 1006 } 1007 // otherwise continue 1008 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1009 hci_send_cmd(&hci_read_local_supported_commands); 1010 break; 1011 case HCI_INIT_SET_BD_ADDR: 1012 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1013 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1014 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1015 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1016 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1017 break; 1018 case HCI_INIT_READ_BD_ADDR: 1019 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1020 hci_send_cmd(&hci_read_bd_addr); 1021 break; 1022 case HCI_INIT_READ_BUFFER_SIZE: 1023 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1024 hci_send_cmd(&hci_read_buffer_size); 1025 break; 1026 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1027 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1028 hci_send_cmd(&hci_read_local_supported_features); 1029 break; 1030 case HCI_INIT_SET_EVENT_MASK: 1031 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1032 if (hci_le_supported()){ 1033 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1034 } else { 1035 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1036 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1037 } 1038 break; 1039 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1040 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1041 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1042 break; 1043 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1044 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1045 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1046 break; 1047 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1048 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1049 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1050 break; 1051 case HCI_INIT_WRITE_LOCAL_NAME: 1052 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1053 if (hci_stack->local_name){ 1054 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1055 } else { 1056 char local_name[30]; 1057 // BTstack-11:22:33:44:55:66 1058 strcpy(local_name, "BTstack "); 1059 strcat(local_name, bd_addr_to_str(hci_stack->local_bd_addr)); 1060 log_info("---> Name %s", local_name); 1061 hci_send_cmd(&hci_write_local_name, local_name); 1062 } 1063 break; 1064 case HCI_INIT_WRITE_SCAN_ENABLE: 1065 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1066 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1067 break; 1068 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1069 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1070 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1071 break; 1072 #ifdef ENABLE_BLE 1073 // LE INIT 1074 case HCI_INIT_LE_READ_BUFFER_SIZE: 1075 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1076 hci_send_cmd(&hci_le_read_buffer_size); 1077 break; 1078 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1079 // LE Supported Host = 1, Simultaneous Host = 0 1080 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1081 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1082 break; 1083 case HCI_INIT_READ_WHITE_LIST_SIZE: 1084 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1085 hci_send_cmd(&hci_le_read_white_list_size); 1086 break; 1087 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1088 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1089 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1090 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1091 break; 1092 #endif 1093 default: 1094 return; 1095 } 1096 } 1097 1098 static void hci_init_done(void){ 1099 // done. tell the app 1100 log_info("hci_init_done -> HCI_STATE_WORKING"); 1101 hci_stack->state = HCI_STATE_WORKING; 1102 hci_emit_state(); 1103 hci_run(); 1104 } 1105 1106 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1107 uint8_t command_completed = 0; 1108 1109 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 1110 uint16_t opcode = little_endian_read_16(packet,3); 1111 if (opcode == hci_stack->last_cmd_opcode){ 1112 command_completed = 1; 1113 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1114 } else { 1115 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1116 } 1117 } 1118 1119 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 1120 uint8_t status = packet[2]; 1121 uint16_t opcode = little_endian_read_16(packet,4); 1122 if (opcode == hci_stack->last_cmd_opcode){ 1123 if (status){ 1124 command_completed = 1; 1125 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1126 } else { 1127 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1128 } 1129 } else { 1130 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1131 } 1132 } 1133 1134 // Vendor == CSR 1135 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1136 // TODO: track actual command 1137 command_completed = 1; 1138 } 1139 1140 // Vendor == Toshiba 1141 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1142 // TODO: track actual command 1143 command_completed = 1; 1144 } 1145 1146 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1147 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1148 // 1149 // HCI Reset 1150 // Timeout 100 ms 1151 // HCI Reset 1152 // Command Complete Reset 1153 // HCI Read Local Version Information 1154 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1155 // hang... 1156 // 1157 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1158 if (!command_completed 1159 && packet[0] == HCI_EVENT_COMMAND_COMPLETE 1160 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1161 1162 uint16_t opcode = little_endian_read_16(packet,3); 1163 if (opcode == hci_reset.opcode){ 1164 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1165 return; 1166 } 1167 } 1168 1169 1170 1171 if (!command_completed) return; 1172 1173 int need_baud_change = hci_stack->config 1174 && hci_stack->chipset 1175 && hci_stack->chipset->set_baudrate_command 1176 && hci_stack->hci_transport->set_baudrate 1177 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1178 1179 int need_addr_change = hci_stack->custom_bd_addr_set 1180 && hci_stack->chipset 1181 && hci_stack->chipset->set_bd_addr_command; 1182 1183 switch(hci_stack->substate){ 1184 case HCI_INIT_W4_SEND_RESET: 1185 btstack_run_loop_remove_timer(&hci_stack->timeout); 1186 break; 1187 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1188 log_info("Received local version info, need baud change %u", need_baud_change); 1189 if (need_baud_change){ 1190 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1191 return; 1192 } 1193 // skip baud change 1194 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1195 return; 1196 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1197 // for STLC2500D, baud rate change already happened. 1198 // for others, baud rate gets changed now 1199 if (hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS){ 1200 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1201 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1202 hci_stack->hci_transport->set_baudrate(baud_rate); 1203 } 1204 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1205 return; 1206 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1207 btstack_run_loop_remove_timer(&hci_stack->timeout); 1208 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1209 return; 1210 case HCI_INIT_W4_CUSTOM_INIT: 1211 // repeat custom init 1212 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1213 return; 1214 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1215 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1216 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1217 return; 1218 } 1219 if (need_addr_change){ 1220 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1221 return; 1222 } 1223 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1224 return; 1225 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: { 1226 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1227 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1228 hci_stack->hci_transport->set_baudrate(baud_rate); 1229 if (need_addr_change){ 1230 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1231 return; 1232 } 1233 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1234 return; 1235 } 1236 case HCI_INIT_W4_SET_BD_ADDR: 1237 // for STLC2500D, bd addr change only gets active after sending reset command 1238 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1239 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1240 return; 1241 } 1242 // skipping st warm boot 1243 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1244 return; 1245 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1246 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1247 return; 1248 case HCI_INIT_W4_READ_BD_ADDR: 1249 // only read buffer size if supported 1250 if (hci_stack->local_supported_commands[0] & 0x01) { 1251 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1252 return; 1253 } 1254 // skipping read buffer size 1255 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1256 return; 1257 case HCI_INIT_W4_SET_EVENT_MASK: 1258 // skip Classic init commands for LE only chipsets 1259 if (!hci_classic_supported()){ 1260 if (hci_le_supported()){ 1261 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1262 return; 1263 } else { 1264 log_error("Neither BR/EDR nor LE supported"); 1265 hci_init_done(); 1266 return; 1267 } 1268 } 1269 if (!hci_ssp_supported()){ 1270 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1271 return; 1272 } 1273 break; 1274 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1275 break; 1276 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1277 // skip write le host if not supported (e.g. on LE only EM9301) 1278 if (hci_stack->local_supported_commands[0] & 0x02) break; 1279 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1280 return; 1281 1282 #ifdef HAVE_SCO_OVER_HCI 1283 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1284 // just go to next state 1285 break; 1286 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1287 if (!hci_le_supported()){ 1288 // SKIP LE init for Classic only configuration 1289 hci_init_done(); 1290 return; 1291 } 1292 break; 1293 #else 1294 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1295 if (!hci_le_supported()){ 1296 // SKIP LE init for Classic only configuration 1297 hci_init_done(); 1298 return; 1299 } 1300 #endif 1301 break; 1302 // Response to command before init done state -> init done 1303 case (HCI_INIT_DONE-1): 1304 hci_init_done(); 1305 return; 1306 1307 default: 1308 break; 1309 } 1310 hci_initializing_next_state(); 1311 } 1312 1313 static void event_handler(uint8_t *packet, int size){ 1314 1315 uint16_t event_length = packet[1]; 1316 1317 // assert packet is complete 1318 if (size != event_length + 2){ 1319 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1320 return; 1321 } 1322 1323 bd_addr_t addr; 1324 bd_addr_type_t addr_type; 1325 uint8_t link_type; 1326 hci_con_handle_t handle; 1327 hci_connection_t * conn; 1328 int i; 1329 1330 // log_info("HCI:EVENT:%02x", packet[0]); 1331 1332 switch (packet[0]) { 1333 1334 case HCI_EVENT_COMMAND_COMPLETE: 1335 // get num cmd packets 1336 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1337 hci_stack->num_cmd_packets = packet[2]; 1338 1339 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1340 // from offset 5 1341 // status 1342 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1343 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1344 hci_stack->sco_data_packet_length = packet[8]; 1345 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1346 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1347 1348 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1349 // determine usable ACL payload size 1350 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1351 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1352 } 1353 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1354 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1355 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1356 } 1357 } 1358 #ifdef ENABLE_BLE 1359 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1360 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1361 hci_stack->le_acl_packets_total_num = packet[8]; 1362 // determine usable ACL payload size 1363 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1364 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1365 } 1366 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1367 } 1368 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1369 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1370 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1371 } 1372 #endif 1373 // Dump local address 1374 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1375 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1376 hci_stack->local_bd_addr); 1377 log_info("Local Address, Status: 0x%02x: Addr: %s", 1378 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1379 } 1380 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1381 hci_emit_discoverable_enabled(hci_stack->discoverable); 1382 } 1383 // Note: HCI init checks 1384 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1385 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1386 1387 // determine usable ACL packet types based on host buffer size and supported features 1388 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1389 log_info("packet types %04x", hci_stack->packet_types); 1390 1391 // Classic/LE 1392 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1393 } 1394 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1395 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1396 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1397 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1398 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1399 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1400 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1401 } 1402 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1403 hci_stack->local_supported_commands[0] = 1404 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1405 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1406 } 1407 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1408 if (packet[5] == 0){ 1409 hci_stack->synchronous_flow_control_enabled = 1; 1410 } 1411 } 1412 break; 1413 1414 case HCI_EVENT_COMMAND_STATUS: 1415 // get num cmd packets 1416 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1417 hci_stack->num_cmd_packets = packet[3]; 1418 break; 1419 1420 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1421 int offset = 3; 1422 for (i=0; i<packet[2];i++){ 1423 handle = little_endian_read_16(packet, offset); 1424 offset += 2; 1425 uint16_t num_packets = little_endian_read_16(packet, offset); 1426 offset += 2; 1427 1428 conn = hci_connection_for_handle(handle); 1429 if (!conn){ 1430 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1431 continue; 1432 } 1433 1434 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1435 if (conn->num_sco_packets_sent >= num_packets){ 1436 conn->num_sco_packets_sent -= num_packets; 1437 } else { 1438 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1439 conn->num_sco_packets_sent = 0; 1440 } 1441 hci_notify_if_sco_can_send_now(); 1442 } else { 1443 if (conn->num_acl_packets_sent >= num_packets){ 1444 conn->num_acl_packets_sent -= num_packets; 1445 } else { 1446 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1447 conn->num_acl_packets_sent = 0; 1448 } 1449 } 1450 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1451 } 1452 break; 1453 } 1454 case HCI_EVENT_CONNECTION_REQUEST: 1455 reverse_bd_addr(&packet[2], addr); 1456 // TODO: eval COD 8-10 1457 link_type = packet[11]; 1458 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1459 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1460 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1461 if (!conn) { 1462 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1463 } 1464 if (!conn) { 1465 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1466 hci_stack->decline_reason = 0x0d; 1467 bd_addr_copy(hci_stack->decline_addr, addr); 1468 break; 1469 } 1470 conn->role = HCI_ROLE_SLAVE; 1471 conn->state = RECEIVED_CONNECTION_REQUEST; 1472 // store info about eSCO 1473 if (link_type == 0x02){ 1474 conn->remote_supported_feature_eSCO = 1; 1475 } 1476 hci_run(); 1477 break; 1478 1479 case HCI_EVENT_CONNECTION_COMPLETE: 1480 // Connection management 1481 reverse_bd_addr(&packet[5], addr); 1482 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1483 addr_type = BD_ADDR_TYPE_CLASSIC; 1484 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1485 if (conn) { 1486 if (!packet[2]){ 1487 conn->state = OPEN; 1488 conn->con_handle = little_endian_read_16(packet, 3); 1489 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1490 1491 // restart timer 1492 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1493 btstack_run_loop_add_timer(&conn->timeout); 1494 1495 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1496 1497 hci_emit_nr_connections_changed(); 1498 } else { 1499 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1500 uint8_t status = packet[2]; 1501 bd_addr_t bd_address; 1502 memcpy(&bd_address, conn->address, 6); 1503 1504 // connection failed, remove entry 1505 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1506 btstack_memory_hci_connection_free( conn ); 1507 1508 // notify client if dedicated bonding 1509 if (notify_dedicated_bonding_failed){ 1510 log_info("hci notify_dedicated_bonding_failed"); 1511 hci_emit_dedicated_bonding_result(bd_address, status); 1512 } 1513 1514 // if authentication error, also delete link key 1515 if (packet[2] == 0x05) { 1516 hci_drop_link_key_for_bd_addr(addr); 1517 } 1518 } 1519 } 1520 break; 1521 1522 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1523 reverse_bd_addr(&packet[5], addr); 1524 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1525 if (packet[2]){ 1526 // connection failed 1527 break; 1528 } 1529 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1530 if (!conn) { 1531 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1532 } 1533 if (!conn) { 1534 break; 1535 } 1536 conn->state = OPEN; 1537 conn->con_handle = little_endian_read_16(packet, 3); 1538 break; 1539 1540 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1541 handle = little_endian_read_16(packet, 3); 1542 conn = hci_connection_for_handle(handle); 1543 if (!conn) break; 1544 if (!packet[2]){ 1545 uint8_t * features = &packet[5]; 1546 if (features[6] & (1 << 3)){ 1547 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1548 } 1549 if (features[3] & (1<<7)){ 1550 conn->remote_supported_feature_eSCO = 1; 1551 } 1552 } 1553 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1554 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1555 if (conn->bonding_flags & BONDING_DEDICATED){ 1556 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1557 } 1558 break; 1559 1560 case HCI_EVENT_LINK_KEY_REQUEST: 1561 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1562 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1563 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1564 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1565 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1566 hci_run(); 1567 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1568 return; 1569 1570 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1571 reverse_bd_addr(&packet[2], addr); 1572 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1573 if (!conn) break; 1574 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1575 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1576 // Change Connection Encryption keeps link key type 1577 if (link_key_type != CHANGED_COMBINATION_KEY){ 1578 conn->link_key_type = link_key_type; 1579 } 1580 if (!hci_stack->link_key_db) break; 1581 hci_stack->link_key_db->put_link_key(addr, &packet[8], conn->link_key_type); 1582 // still forward event to allow dismiss of pairing dialog 1583 break; 1584 } 1585 1586 case HCI_EVENT_PIN_CODE_REQUEST: 1587 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1588 // non-bondable mode: pin code negative reply will be sent 1589 if (!hci_stack->bondable){ 1590 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1591 hci_run(); 1592 return; 1593 } 1594 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1595 if (!hci_stack->link_key_db) break; 1596 reverse_bd_addr(&packet[2], addr); 1597 hci_stack->link_key_db->delete_link_key(addr); 1598 break; 1599 1600 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1601 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1602 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1603 break; 1604 1605 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1606 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1607 if (!hci_stack->ssp_auto_accept) break; 1608 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1609 break; 1610 1611 case HCI_EVENT_USER_PASSKEY_REQUEST: 1612 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1613 if (!hci_stack->ssp_auto_accept) break; 1614 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1615 break; 1616 1617 case HCI_EVENT_ENCRYPTION_CHANGE: 1618 handle = little_endian_read_16(packet, 3); 1619 conn = hci_connection_for_handle(handle); 1620 if (!conn) break; 1621 if (packet[2] == 0) { 1622 if (packet[5]){ 1623 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1624 } else { 1625 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1626 } 1627 } 1628 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1629 break; 1630 1631 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1632 handle = little_endian_read_16(packet, 3); 1633 conn = hci_connection_for_handle(handle); 1634 if (!conn) break; 1635 1636 // dedicated bonding: send result and disconnect 1637 if (conn->bonding_flags & BONDING_DEDICATED){ 1638 conn->bonding_flags &= ~BONDING_DEDICATED; 1639 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1640 conn->bonding_status = packet[2]; 1641 break; 1642 } 1643 1644 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1645 // link key sufficient for requested security 1646 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1647 break; 1648 } 1649 // not enough 1650 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1651 break; 1652 1653 // HCI_EVENT_DISCONNECTION_COMPLETE 1654 // has been split, to first notify stack before shutting connection down 1655 // see end of function, too. 1656 case HCI_EVENT_DISCONNECTION_COMPLETE: 1657 if (packet[2]) break; // status != 0 1658 handle = little_endian_read_16(packet, 3); 1659 conn = hci_connection_for_handle(handle); 1660 if (!conn) break; // no conn struct anymore 1661 // re-enable advertisements for le connections if active 1662 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1663 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1664 } 1665 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1666 break; 1667 1668 case HCI_EVENT_HARDWARE_ERROR: 1669 if (hci_stack->hardware_error_callback){ 1670 (*hci_stack->hardware_error_callback)(); 1671 } else { 1672 // if no special requests, just reboot stack 1673 hci_power_control_off(); 1674 hci_power_control_on(); 1675 } 1676 break; 1677 1678 case HCI_EVENT_ROLE_CHANGE: 1679 if (packet[2]) break; // status != 0 1680 handle = little_endian_read_16(packet, 3); 1681 conn = hci_connection_for_handle(handle); 1682 if (!conn) break; // no conn 1683 conn->role = packet[9]; 1684 break; 1685 1686 case DAEMON_EVENT_HCI_PACKET_SENT: 1687 // release packet buffer only for asynchronous transport and if there are not further fragements 1688 if (hci_transport_synchronous()) { 1689 log_error("Synchronous HCI Transport shouldn't send DAEMON_EVENT_HCI_PACKET_SENT"); 1690 return; // instead of break: to avoid re-entering hci_run() 1691 } 1692 if (hci_stack->acl_fragmentation_total_size) break; 1693 hci_release_packet_buffer(); 1694 1695 // L2CAP receives this event via the hci_add_event_handler 1696 // For SCO, we do the can send now check here 1697 hci_notify_if_sco_can_send_now(); 1698 break; 1699 1700 #ifdef ENABLE_BLE 1701 case HCI_EVENT_LE_META: 1702 switch (packet[2]){ 1703 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1704 log_info("advertising report received"); 1705 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1706 le_handle_advertisement_report(packet, size); 1707 break; 1708 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1709 // Connection management 1710 reverse_bd_addr(&packet[8], addr); 1711 addr_type = (bd_addr_type_t)packet[7]; 1712 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1713 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1714 // if auto-connect, remove from whitelist in both roles 1715 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1716 hci_remove_from_whitelist(addr_type, addr); 1717 } 1718 // handle error: error is reported only to the initiator -> outgoing connection 1719 if (packet[3]){ 1720 // outgoing connection establishment is done 1721 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1722 // remove entry 1723 if (conn){ 1724 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1725 btstack_memory_hci_connection_free( conn ); 1726 } 1727 break; 1728 } 1729 // on success, both hosts receive connection complete event 1730 if (packet[6] == HCI_ROLE_MASTER){ 1731 // if we're master, it was an outgoing connection and we're done with it 1732 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1733 } else { 1734 // if we're slave, it was an incoming connection, advertisements have stopped 1735 hci_stack->le_advertisements_active = 0; 1736 } 1737 // LE connections are auto-accepted, so just create a connection if there isn't one already 1738 if (!conn){ 1739 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1740 } 1741 // no memory, sorry. 1742 if (!conn){ 1743 break; 1744 } 1745 1746 conn->state = OPEN; 1747 conn->role = packet[6]; 1748 conn->con_handle = little_endian_read_16(packet, 4); 1749 1750 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1751 1752 // restart timer 1753 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1754 // btstack_run_loop_add_timer(&conn->timeout); 1755 1756 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1757 1758 hci_emit_nr_connections_changed(); 1759 break; 1760 1761 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1762 1763 default: 1764 break; 1765 } 1766 break; 1767 #endif 1768 default: 1769 break; 1770 } 1771 1772 // handle BT initialization 1773 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1774 hci_initializing_event_handler(packet, size); 1775 } 1776 1777 // help with BT sleep 1778 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1779 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1780 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1781 hci_initializing_next_state(); 1782 } 1783 1784 // notify upper stack 1785 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1786 1787 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1788 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1789 if (!packet[2]){ 1790 handle = little_endian_read_16(packet, 3); 1791 hci_connection_t * aConn = hci_connection_for_handle(handle); 1792 if (aConn) { 1793 uint8_t status = aConn->bonding_status; 1794 uint16_t flags = aConn->bonding_flags; 1795 bd_addr_t bd_address; 1796 memcpy(&bd_address, aConn->address, 6); 1797 hci_shutdown_connection(aConn); 1798 // connection struct is gone, don't access anymore 1799 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1800 hci_emit_dedicated_bonding_result(bd_address, status); 1801 } 1802 } 1803 } 1804 } 1805 1806 // execute main loop 1807 hci_run(); 1808 } 1809 1810 static void sco_handler(uint8_t * packet, uint16_t size){ 1811 if (!hci_stack->sco_packet_handler) return; 1812 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, packet, size); 1813 } 1814 1815 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1816 hci_dump_packet(packet_type, 1, packet, size); 1817 switch (packet_type) { 1818 case HCI_EVENT_PACKET: 1819 event_handler(packet, size); 1820 break; 1821 case HCI_ACL_DATA_PACKET: 1822 acl_handler(packet, size); 1823 break; 1824 case HCI_SCO_DATA_PACKET: 1825 sco_handler(packet, size); 1826 default: 1827 break; 1828 } 1829 } 1830 1831 /** 1832 * @brief Add event packet handler. 1833 */ 1834 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1835 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1836 } 1837 1838 1839 /** Register HCI packet handlers */ 1840 void hci_register_acl_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1841 hci_stack->acl_packet_handler = handler; 1842 } 1843 1844 /** 1845 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1846 */ 1847 void hci_register_sco_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1848 hci_stack->sco_packet_handler = handler; 1849 } 1850 1851 static void hci_state_reset(void){ 1852 // no connections yet 1853 hci_stack->connections = NULL; 1854 1855 // keep discoverable/connectable as this has been requested by the client(s) 1856 // hci_stack->discoverable = 0; 1857 // hci_stack->connectable = 0; 1858 // hci_stack->bondable = 1; 1859 1860 // buffer is free 1861 hci_stack->hci_packet_buffer_reserved = 0; 1862 1863 // no pending cmds 1864 hci_stack->decline_reason = 0; 1865 hci_stack->new_scan_enable_value = 0xff; 1866 1867 // LE 1868 hci_stack->adv_addr_type = 0; 1869 memset(hci_stack->adv_address, 0, 6); 1870 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1871 hci_stack->le_scan_type = 0xff; 1872 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1873 hci_stack->le_whitelist = 0; 1874 hci_stack->le_whitelist_capacity = 0; 1875 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1876 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1877 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1878 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1879 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1880 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1881 } 1882 1883 /** 1884 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1885 */ 1886 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1887 // store and open remote device db 1888 hci_stack->link_key_db = link_key_db; 1889 if (hci_stack->link_key_db) { 1890 hci_stack->link_key_db->open(); 1891 } 1892 } 1893 1894 void hci_init(const hci_transport_t *transport, const void *config){ 1895 1896 #ifdef HAVE_MALLOC 1897 if (!hci_stack) { 1898 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1899 } 1900 #else 1901 hci_stack = &hci_stack_static; 1902 #endif 1903 memset(hci_stack, 0, sizeof(hci_stack_t)); 1904 1905 // reference to use transport layer implementation 1906 hci_stack->hci_transport = transport; 1907 1908 // reference to used config 1909 hci_stack->config = config; 1910 1911 // max acl payload size defined in config.h 1912 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1913 1914 // register packet handlers with transport 1915 transport->register_packet_handler(&packet_handler); 1916 1917 hci_stack->state = HCI_STATE_OFF; 1918 1919 // class of device 1920 hci_stack->class_of_device = 0x007a020c; // Smartphone 1921 1922 // bondable by default 1923 hci_stack->bondable = 1; 1924 1925 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1926 hci_stack->ssp_enable = 1; 1927 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1928 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1929 hci_stack->ssp_auto_accept = 1; 1930 1931 // voice setting - signed 8 bit pcm data with CVSD over the air 1932 hci_stack->sco_voice_setting = 0x40; 1933 1934 hci_state_reset(); 1935 } 1936 1937 /** 1938 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 1939 */ 1940 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 1941 hci_stack->chipset = chipset_driver; 1942 1943 // reset chipset driver - init is also called on power_up 1944 if (hci_stack->chipset && hci_stack->chipset->init){ 1945 hci_stack->chipset->init(hci_stack->config); 1946 } 1947 } 1948 1949 /** 1950 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 1951 */ 1952 void hci_set_control(const btstack_control_t *hardware_control){ 1953 // references to used control implementation 1954 hci_stack->control = hardware_control; 1955 // init with transport config 1956 hardware_control->init(hci_stack->config); 1957 } 1958 1959 void hci_close(void){ 1960 // close remote device db 1961 if (hci_stack->link_key_db) { 1962 hci_stack->link_key_db->close(); 1963 } 1964 while (hci_stack->connections) { 1965 // cancel all l2cap connections 1966 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1967 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1968 } 1969 hci_power_control(HCI_POWER_OFF); 1970 1971 #ifdef HAVE_MALLOC 1972 free(hci_stack); 1973 #endif 1974 hci_stack = NULL; 1975 } 1976 1977 void hci_set_class_of_device(uint32_t class_of_device){ 1978 hci_stack->class_of_device = class_of_device; 1979 } 1980 1981 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 1982 void hci_set_bd_addr(bd_addr_t addr){ 1983 memcpy(hci_stack->custom_bd_addr, addr, 6); 1984 hci_stack->custom_bd_addr_set = 1; 1985 } 1986 1987 void hci_disable_l2cap_timeout_check(void){ 1988 disable_l2cap_timeouts = 1; 1989 } 1990 // State-Module-Driver overview 1991 // state module low-level 1992 // HCI_STATE_OFF off close 1993 // HCI_STATE_INITIALIZING, on open 1994 // HCI_STATE_WORKING, on open 1995 // HCI_STATE_HALTING, on open 1996 // HCI_STATE_SLEEPING, off/sleep close 1997 // HCI_STATE_FALLING_ASLEEP on open 1998 1999 static int hci_power_control_on(void){ 2000 2001 // power on 2002 int err = 0; 2003 if (hci_stack->control && hci_stack->control->on){ 2004 err = (*hci_stack->control->on)(); 2005 } 2006 if (err){ 2007 log_error( "POWER_ON failed"); 2008 hci_emit_hci_open_failed(); 2009 return err; 2010 } 2011 2012 // int chipset driver 2013 if (hci_stack->chipset && hci_stack->chipset->init){ 2014 hci_stack->chipset->init(hci_stack->config); 2015 } 2016 2017 // init transport 2018 if (hci_stack->hci_transport->init){ 2019 hci_stack->hci_transport->init(hci_stack->config); 2020 } 2021 2022 // open transport 2023 err = hci_stack->hci_transport->open(); 2024 if (err){ 2025 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2026 if (hci_stack->control && hci_stack->control->off){ 2027 (*hci_stack->control->off)(); 2028 } 2029 hci_emit_hci_open_failed(); 2030 return err; 2031 } 2032 return 0; 2033 } 2034 2035 static void hci_power_control_off(void){ 2036 2037 log_info("hci_power_control_off"); 2038 2039 // close low-level device 2040 hci_stack->hci_transport->close(); 2041 2042 log_info("hci_power_control_off - hci_transport closed"); 2043 2044 // power off 2045 if (hci_stack->control && hci_stack->control->off){ 2046 (*hci_stack->control->off)(); 2047 } 2048 2049 log_info("hci_power_control_off - control closed"); 2050 2051 hci_stack->state = HCI_STATE_OFF; 2052 } 2053 2054 static void hci_power_control_sleep(void){ 2055 2056 log_info("hci_power_control_sleep"); 2057 2058 #if 0 2059 // don't close serial port during sleep 2060 2061 // close low-level device 2062 hci_stack->hci_transport->close(hci_stack->config); 2063 #endif 2064 2065 // sleep mode 2066 if (hci_stack->control && hci_stack->control->sleep){ 2067 (*hci_stack->control->sleep)(); 2068 } 2069 2070 hci_stack->state = HCI_STATE_SLEEPING; 2071 } 2072 2073 static int hci_power_control_wake(void){ 2074 2075 log_info("hci_power_control_wake"); 2076 2077 // wake on 2078 if (hci_stack->control && hci_stack->control->wake){ 2079 (*hci_stack->control->wake)(); 2080 } 2081 2082 #if 0 2083 // open low-level device 2084 int err = hci_stack->hci_transport->open(hci_stack->config); 2085 if (err){ 2086 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2087 if (hci_stack->control && hci_stack->control->off){ 2088 (*hci_stack->control->off)(); 2089 } 2090 hci_emit_hci_open_failed(); 2091 return err; 2092 } 2093 #endif 2094 2095 return 0; 2096 } 2097 2098 static void hci_power_transition_to_initializing(void){ 2099 // set up state machine 2100 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2101 hci_stack->hci_packet_buffer_reserved = 0; 2102 hci_stack->state = HCI_STATE_INITIALIZING; 2103 hci_stack->substate = HCI_INIT_SEND_RESET; 2104 } 2105 2106 int hci_power_control(HCI_POWER_MODE power_mode){ 2107 2108 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2109 2110 int err = 0; 2111 switch (hci_stack->state){ 2112 2113 case HCI_STATE_OFF: 2114 switch (power_mode){ 2115 case HCI_POWER_ON: 2116 err = hci_power_control_on(); 2117 if (err) { 2118 log_error("hci_power_control_on() error %u", err); 2119 return err; 2120 } 2121 hci_power_transition_to_initializing(); 2122 break; 2123 case HCI_POWER_OFF: 2124 // do nothing 2125 break; 2126 case HCI_POWER_SLEEP: 2127 // do nothing (with SLEEP == OFF) 2128 break; 2129 } 2130 break; 2131 2132 case HCI_STATE_INITIALIZING: 2133 switch (power_mode){ 2134 case HCI_POWER_ON: 2135 // do nothing 2136 break; 2137 case HCI_POWER_OFF: 2138 // no connections yet, just turn it off 2139 hci_power_control_off(); 2140 break; 2141 case HCI_POWER_SLEEP: 2142 // no connections yet, just turn it off 2143 hci_power_control_sleep(); 2144 break; 2145 } 2146 break; 2147 2148 case HCI_STATE_WORKING: 2149 switch (power_mode){ 2150 case HCI_POWER_ON: 2151 // do nothing 2152 break; 2153 case HCI_POWER_OFF: 2154 // see hci_run 2155 hci_stack->state = HCI_STATE_HALTING; 2156 break; 2157 case HCI_POWER_SLEEP: 2158 // see hci_run 2159 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2160 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2161 break; 2162 } 2163 break; 2164 2165 case HCI_STATE_HALTING: 2166 switch (power_mode){ 2167 case HCI_POWER_ON: 2168 hci_power_transition_to_initializing(); 2169 break; 2170 case HCI_POWER_OFF: 2171 // do nothing 2172 break; 2173 case HCI_POWER_SLEEP: 2174 // see hci_run 2175 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2176 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2177 break; 2178 } 2179 break; 2180 2181 case HCI_STATE_FALLING_ASLEEP: 2182 switch (power_mode){ 2183 case HCI_POWER_ON: 2184 2185 #ifdef HAVE_PLATFORM_IPHONE_OS 2186 // nothing to do, if H4 supports power management 2187 if (btstack_control_iphone_power_management_enabled()){ 2188 hci_stack->state = HCI_STATE_INITIALIZING; 2189 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2190 break; 2191 } 2192 #endif 2193 hci_power_transition_to_initializing(); 2194 break; 2195 case HCI_POWER_OFF: 2196 // see hci_run 2197 hci_stack->state = HCI_STATE_HALTING; 2198 break; 2199 case HCI_POWER_SLEEP: 2200 // do nothing 2201 break; 2202 } 2203 break; 2204 2205 case HCI_STATE_SLEEPING: 2206 switch (power_mode){ 2207 case HCI_POWER_ON: 2208 2209 #ifdef HAVE_PLATFORM_IPHONE_OS 2210 // nothing to do, if H4 supports power management 2211 if (btstack_control_iphone_power_management_enabled()){ 2212 hci_stack->state = HCI_STATE_INITIALIZING; 2213 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2214 hci_update_scan_enable(); 2215 break; 2216 } 2217 #endif 2218 err = hci_power_control_wake(); 2219 if (err) return err; 2220 hci_power_transition_to_initializing(); 2221 break; 2222 case HCI_POWER_OFF: 2223 hci_stack->state = HCI_STATE_HALTING; 2224 break; 2225 case HCI_POWER_SLEEP: 2226 // do nothing 2227 break; 2228 } 2229 break; 2230 } 2231 2232 // create internal event 2233 hci_emit_state(); 2234 2235 // trigger next/first action 2236 hci_run(); 2237 2238 return 0; 2239 } 2240 2241 static void hci_update_scan_enable(void){ 2242 // 2 = page scan, 1 = inq scan 2243 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2244 hci_run(); 2245 } 2246 2247 void hci_discoverable_control(uint8_t enable){ 2248 if (enable) enable = 1; // normalize argument 2249 2250 if (hci_stack->discoverable == enable){ 2251 hci_emit_discoverable_enabled(hci_stack->discoverable); 2252 return; 2253 } 2254 2255 hci_stack->discoverable = enable; 2256 hci_update_scan_enable(); 2257 } 2258 2259 void hci_connectable_control(uint8_t enable){ 2260 if (enable) enable = 1; // normalize argument 2261 2262 // don't emit event 2263 if (hci_stack->connectable == enable) return; 2264 2265 hci_stack->connectable = enable; 2266 hci_update_scan_enable(); 2267 } 2268 2269 void hci_local_bd_addr(bd_addr_t address_buffer){ 2270 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2271 } 2272 2273 static void hci_run(void){ 2274 2275 // log_info("hci_run: entered"); 2276 btstack_linked_item_t * it; 2277 2278 // send continuation fragments first, as they block the prepared packet buffer 2279 if (hci_stack->acl_fragmentation_total_size > 0) { 2280 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2281 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2282 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2283 if (connection) { 2284 hci_send_acl_packet_fragments(connection); 2285 return; 2286 } 2287 // connection gone -> discard further fragments 2288 hci_stack->acl_fragmentation_total_size = 0; 2289 hci_stack->acl_fragmentation_pos = 0; 2290 } 2291 } 2292 2293 if (!hci_can_send_command_packet_now()) return; 2294 2295 // global/non-connection oriented commands 2296 2297 // decline incoming connections 2298 if (hci_stack->decline_reason){ 2299 uint8_t reason = hci_stack->decline_reason; 2300 hci_stack->decline_reason = 0; 2301 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2302 return; 2303 } 2304 2305 // send scan enable 2306 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2307 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2308 hci_stack->new_scan_enable_value = 0xff; 2309 return; 2310 } 2311 2312 #ifdef ENABLE_BLE 2313 if (hci_stack->state == HCI_STATE_WORKING){ 2314 // handle le scan 2315 switch(hci_stack->le_scanning_state){ 2316 case LE_START_SCAN: 2317 hci_stack->le_scanning_state = LE_SCANNING; 2318 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2319 return; 2320 2321 case LE_STOP_SCAN: 2322 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2323 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2324 return; 2325 default: 2326 break; 2327 } 2328 if (hci_stack->le_scan_type != 0xff){ 2329 // defaults: active scanning, accept all advertisement packets 2330 int scan_type = hci_stack->le_scan_type; 2331 hci_stack->le_scan_type = 0xff; 2332 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->adv_addr_type, 0); 2333 return; 2334 } 2335 // le advertisement control 2336 if (hci_stack->le_advertisements_todo){ 2337 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2338 } 2339 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2340 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2341 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2342 return; 2343 } 2344 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2345 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2346 hci_send_cmd(&hci_le_set_advertising_parameters, 2347 hci_stack->le_advertisements_interval_min, 2348 hci_stack->le_advertisements_interval_max, 2349 hci_stack->le_advertisements_type, 2350 hci_stack->le_advertisements_own_address_type, 2351 hci_stack->le_advertisements_direct_address_type, 2352 hci_stack->le_advertisements_direct_address, 2353 hci_stack->le_advertisements_channel_map, 2354 hci_stack->le_advertisements_filter_policy); 2355 return; 2356 } 2357 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_DATA){ 2358 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_DATA; 2359 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2360 hci_stack->le_advertisements_data); 2361 return; 2362 } 2363 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2364 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2365 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2366 return; 2367 } 2368 2369 // 2370 // LE Whitelist Management 2371 // 2372 2373 // check if whitelist needs modification 2374 btstack_linked_list_iterator_t lit; 2375 int modification_pending = 0; 2376 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2377 while (btstack_linked_list_iterator_has_next(&lit)){ 2378 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2379 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2380 modification_pending = 1; 2381 break; 2382 } 2383 } 2384 2385 if (modification_pending){ 2386 // stop connnecting if modification pending 2387 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2388 hci_send_cmd(&hci_le_create_connection_cancel); 2389 return; 2390 } 2391 2392 // add/remove entries 2393 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2394 while (btstack_linked_list_iterator_has_next(&lit)){ 2395 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2396 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2397 entry->state = LE_WHITELIST_ON_CONTROLLER; 2398 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2399 return; 2400 2401 } 2402 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2403 bd_addr_t address; 2404 bd_addr_type_t address_type = entry->address_type; 2405 memcpy(address, entry->address, 6); 2406 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2407 btstack_memory_whitelist_entry_free(entry); 2408 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2409 return; 2410 } 2411 } 2412 } 2413 2414 // start connecting 2415 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2416 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2417 bd_addr_t null_addr; 2418 memset(null_addr, 0, 6); 2419 hci_send_cmd(&hci_le_create_connection, 2420 0x0060, // scan interval: 60 ms 2421 0x0030, // scan interval: 30 ms 2422 1, // use whitelist 2423 0, // peer address type 2424 null_addr, // peer bd addr 2425 hci_stack->adv_addr_type, // our addr type: 2426 0x0008, // conn interval min 2427 0x0018, // conn interval max 2428 0, // conn latency 2429 0x0048, // supervision timeout 2430 0x0001, // min ce length 2431 0x0001 // max ce length 2432 ); 2433 return; 2434 } 2435 } 2436 #endif 2437 2438 // send pending HCI commands 2439 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2440 hci_connection_t * connection = (hci_connection_t *) it; 2441 2442 switch(connection->state){ 2443 case SEND_CREATE_CONNECTION: 2444 switch(connection->address_type){ 2445 case BD_ADDR_TYPE_CLASSIC: 2446 log_info("sending hci_create_connection"); 2447 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2448 break; 2449 default: 2450 #ifdef ENABLE_BLE 2451 log_info("sending hci_le_create_connection"); 2452 hci_send_cmd(&hci_le_create_connection, 2453 0x0060, // scan interval: 60 ms 2454 0x0030, // scan interval: 30 ms 2455 0, // don't use whitelist 2456 connection->address_type, // peer address type 2457 connection->address, // peer bd addr 2458 hci_stack->adv_addr_type, // our addr type: 2459 0x0008, // conn interval min 2460 0x0018, // conn interval max 2461 0, // conn latency 2462 0x0048, // supervision timeout 2463 0x0001, // min ce length 2464 0x0001 // max ce length 2465 ); 2466 2467 connection->state = SENT_CREATE_CONNECTION; 2468 #endif 2469 break; 2470 } 2471 return; 2472 2473 case RECEIVED_CONNECTION_REQUEST: 2474 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2475 connection->state = ACCEPTED_CONNECTION_REQUEST; 2476 connection->role = HCI_ROLE_SLAVE; 2477 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2478 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2479 } else { 2480 // remote supported feature eSCO is set if link type is eSCO 2481 uint16_t max_latency; 2482 uint8_t retransmission_effort; 2483 uint16_t packet_types; 2484 // remote supported feature eSCO is set if link type is eSCO 2485 if (connection->remote_supported_feature_eSCO){ 2486 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 2487 max_latency = 0x000c; 2488 retransmission_effort = 0x02; 2489 packet_types = 0x388; 2490 } else { 2491 // SCO: max latency, retransmission interval: N/A. any packet type 2492 max_latency = 0xffff; 2493 retransmission_effort = 0xff; 2494 packet_types = 0x003f; 2495 } 2496 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, max_latency, hci_stack->sco_voice_setting, retransmission_effort, packet_types); 2497 } 2498 return; 2499 2500 #ifdef ENABLE_BLE 2501 case SEND_CANCEL_CONNECTION: 2502 connection->state = SENT_CANCEL_CONNECTION; 2503 hci_send_cmd(&hci_le_create_connection_cancel); 2504 return; 2505 #endif 2506 case SEND_DISCONNECT: 2507 connection->state = SENT_DISCONNECT; 2508 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2509 return; 2510 2511 default: 2512 break; 2513 } 2514 2515 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2516 log_info("responding to link key request"); 2517 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2518 link_key_t link_key; 2519 link_key_type_t link_key_type; 2520 if ( hci_stack->link_key_db 2521 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2522 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2523 connection->link_key_type = link_key_type; 2524 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2525 } else { 2526 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2527 } 2528 return; 2529 } 2530 2531 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2532 log_info("denying to pin request"); 2533 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2534 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2535 return; 2536 } 2537 2538 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2539 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2540 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2541 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2542 // tweak authentication requirements 2543 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2544 if (connection->bonding_flags & BONDING_DEDICATED){ 2545 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2546 } 2547 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2548 authreq |= 1; 2549 } 2550 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2551 } else { 2552 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2553 } 2554 return; 2555 } 2556 2557 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2558 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2559 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2560 return; 2561 } 2562 2563 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2564 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2565 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2566 return; 2567 } 2568 2569 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2570 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2571 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2572 return; 2573 } 2574 2575 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2576 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2577 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2578 return; 2579 } 2580 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2581 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2582 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2583 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2584 return; 2585 } 2586 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2587 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2588 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2589 return; 2590 } 2591 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2592 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2593 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2594 return; 2595 } 2596 2597 #ifdef ENABLE_BLE 2598 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2599 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2600 2601 uint16_t connection_interval_min = connection->le_conn_interval_min; 2602 connection->le_conn_interval_min = 0; 2603 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2604 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2605 0x0000, 0xffff); 2606 } 2607 #endif 2608 } 2609 2610 hci_connection_t * connection; 2611 switch (hci_stack->state){ 2612 case HCI_STATE_INITIALIZING: 2613 hci_initializing_run(); 2614 break; 2615 2616 case HCI_STATE_HALTING: 2617 2618 log_info("HCI_STATE_HALTING"); 2619 2620 // free whitelist entries 2621 #ifdef ENABLE_BLE 2622 { 2623 btstack_linked_list_iterator_t lit; 2624 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2625 while (btstack_linked_list_iterator_has_next(&lit)){ 2626 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2627 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2628 btstack_memory_whitelist_entry_free(entry); 2629 } 2630 } 2631 #endif 2632 // close all open connections 2633 connection = (hci_connection_t *) hci_stack->connections; 2634 if (connection){ 2635 uint16_t con_handle = (uint16_t) connection->con_handle; 2636 if (!hci_can_send_command_packet_now()) return; 2637 2638 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2639 2640 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2641 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2642 2643 // ... which would be ignored anyway as we shutdown (free) the connection now 2644 hci_shutdown_connection(connection); 2645 2646 // finally, send the disconnect command 2647 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2648 return; 2649 } 2650 log_info("HCI_STATE_HALTING, calling off"); 2651 2652 // switch mode 2653 hci_power_control_off(); 2654 2655 log_info("HCI_STATE_HALTING, emitting state"); 2656 hci_emit_state(); 2657 log_info("HCI_STATE_HALTING, done"); 2658 break; 2659 2660 case HCI_STATE_FALLING_ASLEEP: 2661 switch(hci_stack->substate) { 2662 case HCI_FALLING_ASLEEP_DISCONNECT: 2663 log_info("HCI_STATE_FALLING_ASLEEP"); 2664 // close all open connections 2665 connection = (hci_connection_t *) hci_stack->connections; 2666 2667 #ifdef HAVE_PLATFORM_IPHONE_OS 2668 // don't close connections, if H4 supports power management 2669 if (btstack_control_iphone_power_management_enabled()){ 2670 connection = NULL; 2671 } 2672 #endif 2673 if (connection){ 2674 2675 // send disconnect 2676 if (!hci_can_send_command_packet_now()) return; 2677 2678 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2679 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2680 2681 // send disconnected event right away - causes higher layer connections to get closed, too. 2682 hci_shutdown_connection(connection); 2683 return; 2684 } 2685 2686 if (hci_classic_supported()){ 2687 // disable page and inquiry scan 2688 if (!hci_can_send_command_packet_now()) return; 2689 2690 log_info("HCI_STATE_HALTING, disabling inq scans"); 2691 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2692 2693 // continue in next sub state 2694 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2695 break; 2696 } 2697 // fall through for ble-only chips 2698 2699 case HCI_FALLING_ASLEEP_COMPLETE: 2700 log_info("HCI_STATE_HALTING, calling sleep"); 2701 #ifdef HAVE_PLATFORM_IPHONE_OS 2702 // don't actually go to sleep, if H4 supports power management 2703 if (btstack_control_iphone_power_management_enabled()){ 2704 // SLEEP MODE reached 2705 hci_stack->state = HCI_STATE_SLEEPING; 2706 hci_emit_state(); 2707 break; 2708 } 2709 #endif 2710 // switch mode 2711 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2712 hci_emit_state(); 2713 break; 2714 2715 default: 2716 break; 2717 } 2718 break; 2719 2720 default: 2721 break; 2722 } 2723 } 2724 2725 int hci_send_cmd_packet(uint8_t *packet, int size){ 2726 bd_addr_t addr; 2727 hci_connection_t * conn; 2728 // house-keeping 2729 2730 // create_connection? 2731 if (IS_COMMAND(packet, hci_create_connection)){ 2732 reverse_bd_addr(&packet[3], addr); 2733 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2734 2735 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2736 if (!conn){ 2737 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2738 if (!conn){ 2739 // notify client that alloc failed 2740 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2741 return 0; // don't sent packet to controller 2742 } 2743 conn->state = SEND_CREATE_CONNECTION; 2744 } 2745 log_info("conn state %u", conn->state); 2746 switch (conn->state){ 2747 // if connection active exists 2748 case OPEN: 2749 // and OPEN, emit connection complete command, don't send to controller 2750 hci_emit_connection_complete(conn, 0); 2751 return 0; 2752 case SEND_CREATE_CONNECTION: 2753 // connection created by hci, e.g. dedicated bonding 2754 break; 2755 default: 2756 // otherwise, just ignore as it is already in the open process 2757 return 0; 2758 } 2759 conn->state = SENT_CREATE_CONNECTION; 2760 } 2761 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2762 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2763 } 2764 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2765 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2766 } 2767 2768 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2769 if (hci_stack->link_key_db){ 2770 reverse_bd_addr(&packet[3], addr); 2771 hci_stack->link_key_db->delete_link_key(addr); 2772 } 2773 } 2774 2775 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2776 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2777 reverse_bd_addr(&packet[3], addr); 2778 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2779 if (conn){ 2780 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2781 } 2782 } 2783 2784 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2785 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2786 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2787 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2788 reverse_bd_addr(&packet[3], addr); 2789 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2790 if (conn){ 2791 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2792 } 2793 } 2794 2795 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2796 hci_stack->loopback_mode = packet[3]; 2797 } 2798 2799 #ifdef ENABLE_BLE 2800 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2801 hci_stack->adv_addr_type = packet[8]; 2802 } 2803 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2804 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2805 } 2806 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2807 hci_stack->le_advertisements_active = packet[3]; 2808 } 2809 if (IS_COMMAND(packet, hci_le_create_connection)){ 2810 // white list used? 2811 uint8_t initiator_filter_policy = packet[7]; 2812 switch (initiator_filter_policy){ 2813 case 0: 2814 // whitelist not used 2815 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2816 break; 2817 case 1: 2818 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2819 break; 2820 default: 2821 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2822 break; 2823 } 2824 } 2825 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2826 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2827 } 2828 #endif 2829 2830 hci_stack->num_cmd_packets--; 2831 2832 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2833 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2834 2835 // release packet buffer for synchronous transport implementations 2836 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2837 hci_stack->hci_packet_buffer_reserved = 0; 2838 } 2839 2840 return err; 2841 } 2842 2843 // disconnect because of security block 2844 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2845 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2846 if (!connection) return; 2847 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2848 } 2849 2850 2851 // Configure Secure Simple Pairing 2852 2853 // enable will enable SSP during init 2854 void hci_ssp_set_enable(int enable){ 2855 hci_stack->ssp_enable = enable; 2856 } 2857 2858 static int hci_local_ssp_activated(void){ 2859 return hci_ssp_supported() && hci_stack->ssp_enable; 2860 } 2861 2862 // if set, BTstack will respond to io capability request using authentication requirement 2863 void hci_ssp_set_io_capability(int io_capability){ 2864 hci_stack->ssp_io_capability = io_capability; 2865 } 2866 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2867 hci_stack->ssp_authentication_requirement = authentication_requirement; 2868 } 2869 2870 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2871 void hci_ssp_set_auto_accept(int auto_accept){ 2872 hci_stack->ssp_auto_accept = auto_accept; 2873 } 2874 2875 /** 2876 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2877 */ 2878 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2879 2880 if (!hci_can_send_command_packet_now()){ 2881 log_error("hci_send_cmd called but cannot send packet now"); 2882 return 0; 2883 } 2884 2885 // for HCI INITIALIZATION 2886 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2887 hci_stack->last_cmd_opcode = cmd->opcode; 2888 2889 hci_reserve_packet_buffer(); 2890 uint8_t * packet = hci_stack->hci_packet_buffer; 2891 2892 va_list argptr; 2893 va_start(argptr, cmd); 2894 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 2895 va_end(argptr); 2896 2897 return hci_send_cmd_packet(packet, size); 2898 } 2899 2900 // Create various non-HCI events. 2901 // TODO: generalize, use table similar to hci_create_command 2902 2903 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 2904 // dump packet 2905 if (dump) { 2906 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 2907 } 2908 2909 // dispatch to all event handlers 2910 btstack_linked_list_iterator_t it; 2911 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 2912 while (btstack_linked_list_iterator_has_next(&it)){ 2913 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 2914 entry->callback(HCI_EVENT_PACKET, 0, event, size); 2915 } 2916 } 2917 2918 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 2919 if (!hci_stack->acl_packet_handler) return; 2920 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, packet, size); 2921 } 2922 2923 static void hci_notify_if_sco_can_send_now(void){ 2924 // notify SCO sender if waiting 2925 if (!hci_stack->sco_waiting_for_can_send_now) return; 2926 if (hci_can_send_sco_packet_now()){ 2927 hci_stack->sco_waiting_for_can_send_now = 0; 2928 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 2929 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 2930 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2931 } 2932 } 2933 2934 void hci_emit_state(void){ 2935 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2936 uint8_t event[3]; 2937 event[0] = BTSTACK_EVENT_STATE; 2938 event[1] = sizeof(event) - 2; 2939 event[2] = hci_stack->state; 2940 hci_emit_event(event, sizeof(event), 1); 2941 } 2942 2943 static void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2944 uint8_t event[13]; 2945 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2946 event[1] = sizeof(event) - 2; 2947 event[2] = status; 2948 little_endian_store_16(event, 3, conn->con_handle); 2949 reverse_bd_addr(conn->address, &event[5]); 2950 event[11] = 1; // ACL connection 2951 event[12] = 0; // encryption disabled 2952 hci_emit_event(event, sizeof(event), 1); 2953 } 2954 2955 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, uint16_t conn_handle, uint8_t status){ 2956 uint8_t event[21]; 2957 event[0] = HCI_EVENT_LE_META; 2958 event[1] = sizeof(event) - 2; 2959 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2960 event[3] = status; 2961 little_endian_store_16(event, 4, conn_handle); 2962 event[6] = 0; // TODO: role 2963 event[7] = address_type; 2964 reverse_bd_addr(address, &event[8]); 2965 little_endian_store_16(event, 14, 0); // interval 2966 little_endian_store_16(event, 16, 0); // latency 2967 little_endian_store_16(event, 18, 0); // supervision timeout 2968 event[20] = 0; // master clock accuracy 2969 hci_emit_event(event, sizeof(event), 1); 2970 } 2971 2972 static void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2973 uint8_t event[6]; 2974 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2975 event[1] = sizeof(event) - 2; 2976 event[2] = 0; // status = OK 2977 little_endian_store_16(event, 3, handle); 2978 event[5] = reason; 2979 hci_emit_event(event, sizeof(event), 1); 2980 } 2981 2982 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2983 if (disable_l2cap_timeouts) return; 2984 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2985 uint8_t event[4]; 2986 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2987 event[1] = sizeof(event) - 2; 2988 little_endian_store_16(event, 2, conn->con_handle); 2989 hci_emit_event(event, sizeof(event), 1); 2990 } 2991 2992 static void hci_emit_nr_connections_changed(void){ 2993 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2994 uint8_t event[3]; 2995 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2996 event[1] = sizeof(event) - 2; 2997 event[2] = nr_hci_connections(); 2998 hci_emit_event(event, sizeof(event), 1); 2999 } 3000 3001 static void hci_emit_hci_open_failed(void){ 3002 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3003 uint8_t event[2]; 3004 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3005 event[1] = sizeof(event) - 2; 3006 hci_emit_event(event, sizeof(event), 1); 3007 } 3008 3009 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3010 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3011 uint8_t event[3]; 3012 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3013 event[1] = sizeof(event) - 2; 3014 event[2] = enabled; 3015 hci_emit_event(event, sizeof(event), 1); 3016 } 3017 3018 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3019 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3020 uint8_t event[5]; 3021 int pos = 0; 3022 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3023 event[pos++] = sizeof(event) - 2; 3024 little_endian_store_16(event, 2, con_handle); 3025 pos += 2; 3026 event[pos++] = level; 3027 hci_emit_event(event, sizeof(event), 1); 3028 } 3029 3030 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3031 log_info("hci_emit_dedicated_bonding_result %u ", status); 3032 uint8_t event[9]; 3033 int pos = 0; 3034 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3035 event[pos++] = sizeof(event) - 2; 3036 event[pos++] = status; 3037 reverse_bd_addr(address, &event[pos]); 3038 pos += 6; 3039 hci_emit_event(event, sizeof(event), 1); 3040 } 3041 3042 // query if remote side supports eSCO 3043 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3044 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3045 if (!connection) return 0; 3046 return connection->remote_supported_feature_eSCO; 3047 } 3048 3049 // query if remote side supports SSP 3050 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3051 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3052 if (!connection) return 0; 3053 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3054 } 3055 3056 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3057 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3058 } 3059 3060 // GAP API 3061 /** 3062 * @bbrief enable/disable bonding. default is enabled 3063 * @praram enabled 3064 */ 3065 void gap_set_bondable_mode(int enable){ 3066 hci_stack->bondable = enable ? 1 : 0; 3067 } 3068 /** 3069 * @brief Get bondable mode. 3070 * @return 1 if bondable 3071 */ 3072 int gap_get_bondable_mode(void){ 3073 return hci_stack->bondable; 3074 } 3075 3076 /** 3077 * @brief map link keys to security levels 3078 */ 3079 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3080 switch (link_key_type){ 3081 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3082 return LEVEL_4; 3083 case COMBINATION_KEY: 3084 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3085 return LEVEL_3; 3086 default: 3087 return LEVEL_2; 3088 } 3089 } 3090 3091 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3092 if (!connection) return LEVEL_0; 3093 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3094 return gap_security_level_for_link_key_type(connection->link_key_type); 3095 } 3096 3097 3098 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3099 log_info("gap_mitm_protection_required_for_security_level %u", level); 3100 return level > LEVEL_2; 3101 } 3102 3103 /** 3104 * @brief get current security level 3105 */ 3106 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3107 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3108 if (!connection) return LEVEL_0; 3109 return gap_security_level_for_connection(connection); 3110 } 3111 3112 /** 3113 * @brief request connection to device to 3114 * @result GAP_AUTHENTICATION_RESULT 3115 */ 3116 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3117 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3118 if (!connection){ 3119 hci_emit_security_level(con_handle, LEVEL_0); 3120 return; 3121 } 3122 gap_security_level_t current_level = gap_security_level(con_handle); 3123 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3124 if (current_level >= requested_level){ 3125 hci_emit_security_level(con_handle, current_level); 3126 return; 3127 } 3128 3129 connection->requested_security_level = requested_level; 3130 3131 #if 0 3132 // sending encryption request without a link key results in an error. 3133 // TODO: figure out how to use it properly 3134 3135 // would enabling ecnryption suffice (>= LEVEL_2)? 3136 if (hci_stack->link_key_db){ 3137 link_key_type_t link_key_type; 3138 link_key_t link_key; 3139 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3140 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3141 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3142 return; 3143 } 3144 } 3145 } 3146 #endif 3147 3148 // try to authenticate connection 3149 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3150 hci_run(); 3151 } 3152 3153 /** 3154 * @brief start dedicated bonding with device. disconnect after bonding 3155 * @param device 3156 * @param request MITM protection 3157 * @result GAP_DEDICATED_BONDING_COMPLETE 3158 */ 3159 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3160 3161 // create connection state machine 3162 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3163 3164 if (!connection){ 3165 return BTSTACK_MEMORY_ALLOC_FAILED; 3166 } 3167 3168 // delete linkn key 3169 hci_drop_link_key_for_bd_addr(device); 3170 3171 // configure LEVEL_2/3, dedicated bonding 3172 connection->state = SEND_CREATE_CONNECTION; 3173 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3174 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3175 connection->bonding_flags = BONDING_DEDICATED; 3176 3177 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3178 3179 // handle: connnection failure (connection complete != ok) 3180 // handle: authentication failure 3181 // handle: disconnect on done 3182 3183 hci_run(); 3184 3185 return 0; 3186 } 3187 3188 void gap_set_local_name(const char * local_name){ 3189 hci_stack->local_name = local_name; 3190 } 3191 3192 void gap_start_scan(void){ 3193 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3194 hci_stack->le_scanning_state = LE_START_SCAN; 3195 hci_run(); 3196 } 3197 3198 void gap_stop_scan(void){ 3199 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3200 hci_stack->le_scanning_state = LE_STOP_SCAN; 3201 hci_run(); 3202 } 3203 3204 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3205 hci_stack->le_scan_type = scan_type; 3206 hci_stack->le_scan_interval = scan_interval; 3207 hci_stack->le_scan_window = scan_window; 3208 hci_run(); 3209 } 3210 3211 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3212 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3213 if (!conn){ 3214 log_info("gap_connect: no connection exists yet, creating context"); 3215 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3216 if (!conn){ 3217 // notify client that alloc failed 3218 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3219 log_info("gap_connect: failed to alloc hci_connection_t"); 3220 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3221 } 3222 conn->state = SEND_CREATE_CONNECTION; 3223 log_info("gap_connect: send create connection next"); 3224 hci_run(); 3225 return 0; 3226 } 3227 3228 if (!hci_is_le_connection(conn) || 3229 conn->state == SEND_CREATE_CONNECTION || 3230 conn->state == SENT_CREATE_CONNECTION) { 3231 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3232 log_error("gap_connect: classic connection or connect is already being created"); 3233 return GATT_CLIENT_IN_WRONG_STATE; 3234 } 3235 3236 log_info("gap_connect: context exists with state %u", conn->state); 3237 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3238 hci_run(); 3239 return 0; 3240 } 3241 3242 // @assumption: only a single outgoing LE Connection exists 3243 static hci_connection_t * gap_get_outgoing_connection(void){ 3244 btstack_linked_item_t *it; 3245 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3246 hci_connection_t * conn = (hci_connection_t *) it; 3247 if (!hci_is_le_connection(conn)) continue; 3248 switch (conn->state){ 3249 case SEND_CREATE_CONNECTION: 3250 case SENT_CREATE_CONNECTION: 3251 return conn; 3252 default: 3253 break; 3254 }; 3255 } 3256 return NULL; 3257 } 3258 3259 uint8_t gap_connect_cancel(void){ 3260 hci_connection_t * conn = gap_get_outgoing_connection(); 3261 if (!conn) return 0; 3262 switch (conn->state){ 3263 case SEND_CREATE_CONNECTION: 3264 // skip sending create connection and emit event instead 3265 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3266 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3267 btstack_memory_hci_connection_free( conn ); 3268 break; 3269 case SENT_CREATE_CONNECTION: 3270 // request to send cancel connection 3271 conn->state = SEND_CANCEL_CONNECTION; 3272 hci_run(); 3273 break; 3274 default: 3275 break; 3276 } 3277 return 0; 3278 } 3279 3280 /** 3281 * @brief Updates the connection parameters for a given LE connection 3282 * @param handle 3283 * @param conn_interval_min (unit: 1.25ms) 3284 * @param conn_interval_max (unit: 1.25ms) 3285 * @param conn_latency 3286 * @param supervision_timeout (unit: 10ms) 3287 * @returns 0 if ok 3288 */ 3289 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3290 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3291 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3292 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3293 connection->le_conn_interval_min = conn_interval_min; 3294 connection->le_conn_interval_max = conn_interval_max; 3295 connection->le_conn_latency = conn_latency; 3296 connection->le_supervision_timeout = supervision_timeout; 3297 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3298 hci_run(); 3299 return 0; 3300 } 3301 3302 /** 3303 * @brief Request an update of the connection parameter for a given LE connection 3304 * @param handle 3305 * @param conn_interval_min (unit: 1.25ms) 3306 * @param conn_interval_max (unit: 1.25ms) 3307 * @param conn_latency 3308 * @param supervision_timeout (unit: 10ms) 3309 * @returns 0 if ok 3310 */ 3311 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3312 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3313 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3314 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3315 connection->le_conn_interval_min = conn_interval_min; 3316 connection->le_conn_interval_max = conn_interval_max; 3317 connection->le_conn_latency = conn_latency; 3318 connection->le_supervision_timeout = supervision_timeout; 3319 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3320 hci_run(); 3321 return 0; 3322 } 3323 3324 /** 3325 * @brief Set Advertisement Data 3326 * @param advertising_data_length 3327 * @param advertising_data (max 31 octets) 3328 * @note data is not copied, pointer has to stay valid 3329 */ 3330 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3331 hci_stack->le_advertisements_data_len = advertising_data_length; 3332 hci_stack->le_advertisements_data = advertising_data; 3333 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_DATA; 3334 // disable advertisements before setting data 3335 if (hci_stack->le_advertisements_active){ 3336 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3337 } 3338 hci_run(); 3339 } 3340 3341 /** 3342 * @brief Set Advertisement Parameters 3343 * @param adv_int_min 3344 * @param adv_int_max 3345 * @param adv_type 3346 * @param own_address_type 3347 * @param direct_address_type 3348 * @param direct_address 3349 * @param channel_map 3350 * @param filter_policy 3351 * 3352 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3353 */ 3354 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3355 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3356 uint8_t channel_map, uint8_t filter_policy) { 3357 3358 hci_stack->le_advertisements_interval_min = adv_int_min; 3359 hci_stack->le_advertisements_interval_max = adv_int_max; 3360 hci_stack->le_advertisements_type = adv_type; 3361 hci_stack->le_advertisements_own_address_type = own_address_type; 3362 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3363 hci_stack->le_advertisements_channel_map = channel_map; 3364 hci_stack->le_advertisements_filter_policy = filter_policy; 3365 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3366 3367 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3368 // disable advertisements before changing params 3369 if (hci_stack->le_advertisements_active){ 3370 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3371 } 3372 hci_run(); 3373 } 3374 3375 /** 3376 * @brief Enable/Disable Advertisements 3377 * @param enabled 3378 */ 3379 void gap_advertisements_enable(int enabled){ 3380 hci_stack->le_advertisements_enabled = enabled; 3381 if (enabled && !hci_stack->le_advertisements_active){ 3382 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3383 } 3384 if (!enabled && hci_stack->le_advertisements_active){ 3385 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3386 } 3387 hci_run(); 3388 } 3389 3390 3391 uint8_t gap_disconnect(hci_con_handle_t handle){ 3392 hci_connection_t * conn = hci_connection_for_handle(handle); 3393 if (!conn){ 3394 hci_emit_disconnection_complete(handle, 0); 3395 return 0; 3396 } 3397 conn->state = SEND_DISCONNECT; 3398 hci_run(); 3399 return 0; 3400 } 3401 3402 /** 3403 * @brief Get connection type 3404 * @param con_handle 3405 * @result connection_type 3406 */ 3407 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3408 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3409 if (!conn) return GAP_CONNECTION_INVALID; 3410 switch (conn->address_type){ 3411 case BD_ADDR_TYPE_LE_PUBLIC: 3412 case BD_ADDR_TYPE_LE_RANDOM: 3413 return GAP_CONNECTION_LE; 3414 case BD_ADDR_TYPE_SCO: 3415 return GAP_CONNECTION_SCO; 3416 case BD_ADDR_TYPE_CLASSIC: 3417 return GAP_CONNECTION_ACL; 3418 default: 3419 return GAP_CONNECTION_INVALID; 3420 } 3421 } 3422 3423 #ifdef ENABLE_BLE 3424 3425 /** 3426 * @brief Auto Connection Establishment - Start Connecting to device 3427 * @param address_typ 3428 * @param address 3429 * @returns 0 if ok 3430 */ 3431 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3432 // check capacity 3433 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3434 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3435 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3436 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3437 entry->address_type = address_type; 3438 memcpy(entry->address, address, 6); 3439 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3440 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3441 hci_run(); 3442 return 0; 3443 } 3444 3445 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3446 btstack_linked_list_iterator_t it; 3447 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3448 while (btstack_linked_list_iterator_has_next(&it)){ 3449 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3450 if (entry->address_type != address_type) continue; 3451 if (memcmp(entry->address, address, 6) != 0) continue; 3452 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3453 // remove from controller if already present 3454 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3455 continue; 3456 } 3457 // direclty remove entry from whitelist 3458 btstack_linked_list_iterator_remove(&it); 3459 btstack_memory_whitelist_entry_free(entry); 3460 } 3461 } 3462 3463 /** 3464 * @brief Auto Connection Establishment - Stop Connecting to device 3465 * @param address_typ 3466 * @param address 3467 * @returns 0 if ok 3468 */ 3469 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3470 hci_remove_from_whitelist(address_type, address); 3471 hci_run(); 3472 return 0; 3473 } 3474 3475 /** 3476 * @brief Auto Connection Establishment - Stop everything 3477 * @note Convenience function to stop all active auto connection attempts 3478 */ 3479 void gap_auto_connection_stop_all(void){ 3480 btstack_linked_list_iterator_t it; 3481 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3482 while (btstack_linked_list_iterator_has_next(&it)){ 3483 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3484 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3485 // remove from controller if already present 3486 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3487 continue; 3488 } 3489 // directly remove entry from whitelist 3490 btstack_linked_list_iterator_remove(&it); 3491 btstack_memory_whitelist_entry_free(entry); 3492 } 3493 hci_run(); 3494 } 3495 3496 #endif 3497 3498 /** 3499 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3500 */ 3501 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3502 hci_stack->sco_voice_setting = voice_setting; 3503 } 3504 3505 /** 3506 * @brief Get SCO Voice Setting 3507 * @return current voice setting 3508 */ 3509 uint16_t hci_get_sco_voice_setting(){ 3510 return hci_stack->sco_voice_setting; 3511 } 3512 3513 /** @brief Get SCO packet length for current SCO Voice setting 3514 * @note Using SCO packets of the exact length is required for USB transfer 3515 * @return Length of SCO packets in bytes (not audio frames) 3516 */ 3517 int hci_get_sco_packet_length(void){ 3518 // see Core Spec for H2 USB Transfer. 3519 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3520 return 27; 3521 } 3522 3523 /** 3524 * @brief Set callback for Bluetooth Hardware Error 3525 */ 3526 void hci_set_hardware_error_callback(void (*fn)(void)){ 3527 hci_stack->hardware_error_callback = fn; 3528 } 3529 3530 void hci_disconnect_all(void){ 3531 btstack_linked_list_iterator_t it; 3532 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3533 while (btstack_linked_list_iterator_has_next(&it)){ 3534 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3535 if (con->state == SENT_DISCONNECT) continue; 3536 con->state = SEND_DISCONNECT; 3537 } 3538 hci_run(); 3539 } 3540