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_EMBEDDED_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_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "gap.h" 70 #include "hci.h" 71 #include "hci_cmd.h" 72 #include "hci_dump.h" 73 74 75 #define HCI_CONNECTION_TIMEOUT_MS 10000 76 77 // prototypes 78 static void hci_update_scan_enable(void); 79 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 80 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 81 static void hci_connection_timestamp(hci_connection_t *connection); 82 static int hci_power_control_on(void); 83 static void hci_power_control_off(void); 84 static void hci_state_reset(void); 85 static void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status); 86 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 87 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 88 static void hci_emit_nr_connections_changed(void); 89 static void hci_emit_hci_open_failed(void); 90 static void hci_emit_discoverable_enabled(uint8_t enabled); 91 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 92 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 93 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 94 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 95 static void hci_notify_if_sco_can_send_now(void); 96 static void hci_run(void); 97 static int hci_is_le_connection(hci_connection_t * connection); 98 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 99 static int hci_local_ssp_activated(void); 100 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 101 102 #ifdef ENABLE_BLE 103 // called from test/ble_client/advertising_data_parser.c 104 void le_handle_advertisement_report(uint8_t *packet, int size); 105 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 106 #endif 107 108 // the STACK is here 109 #ifndef HAVE_MALLOC 110 static hci_stack_t hci_stack_static; 111 #endif 112 static hci_stack_t * hci_stack = NULL; 113 114 // test helper 115 static uint8_t disable_l2cap_timeouts = 0; 116 117 /** 118 * create connection for given address 119 * 120 * @return connection OR NULL, if no memory left 121 */ 122 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 123 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 124 hci_connection_t * conn = btstack_memory_hci_connection_get(); 125 if (!conn) return NULL; 126 memset(conn, 0, sizeof(hci_connection_t)); 127 bd_addr_copy(conn->address, addr); 128 conn->address_type = addr_type; 129 conn->con_handle = 0xffff; 130 conn->authentication_flags = AUTH_FLAGS_NONE; 131 conn->bonding_flags = 0; 132 conn->requested_security_level = LEVEL_0; 133 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 134 btstack_run_loop_set_timer_context(&conn->timeout, conn); 135 hci_connection_timestamp(conn); 136 conn->acl_recombination_length = 0; 137 conn->acl_recombination_pos = 0; 138 conn->num_acl_packets_sent = 0; 139 conn->num_sco_packets_sent = 0; 140 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 141 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 142 return conn; 143 } 144 145 146 /** 147 * get le connection parameter range 148 * 149 * @return le connection parameter range struct 150 */ 151 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 152 *range = hci_stack->le_connection_parameter_range; 153 } 154 155 /** 156 * set le connection parameter range 157 * 158 */ 159 160 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 161 hci_stack->le_connection_parameter_range = *range; 162 } 163 164 /** 165 * get hci connections iterator 166 * 167 * @return hci connections iterator 168 */ 169 170 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 171 btstack_linked_list_iterator_init(it, &hci_stack->connections); 172 } 173 174 /** 175 * get connection for a given handle 176 * 177 * @return connection OR NULL, if not found 178 */ 179 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 180 btstack_linked_list_iterator_t it; 181 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 182 while (btstack_linked_list_iterator_has_next(&it)){ 183 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 184 if ( item->con_handle == con_handle ) { 185 return item; 186 } 187 } 188 return NULL; 189 } 190 191 /** 192 * get connection for given address 193 * 194 * @return connection OR NULL, if not found 195 */ 196 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 197 btstack_linked_list_iterator_t it; 198 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 199 while (btstack_linked_list_iterator_has_next(&it)){ 200 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 201 if (connection->address_type != addr_type) continue; 202 if (memcmp(addr, connection->address, 6) != 0) continue; 203 return connection; 204 } 205 return NULL; 206 } 207 208 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 209 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 210 #ifdef HAVE_EMBEDDED_TICK 211 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 212 // connections might be timed out 213 hci_emit_l2cap_check_timeout(connection); 214 } 215 #else 216 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 217 // connections might be timed out 218 hci_emit_l2cap_check_timeout(connection); 219 } 220 #endif 221 } 222 223 static void hci_connection_timestamp(hci_connection_t *connection){ 224 #ifdef HAVE_EMBEDDED_TICK 225 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 226 #else 227 connection->timestamp = btstack_run_loop_get_time_ms(); 228 #endif 229 } 230 231 232 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 233 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 234 } 235 236 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 237 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 238 } 239 240 241 /** 242 * add authentication flags and reset timer 243 * @note: assumes classic connection 244 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 245 */ 246 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 247 bd_addr_t addr; 248 reverse_bd_addr(bd_addr, addr); 249 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 250 if (conn) { 251 connectionSetAuthenticationFlags(conn, flags); 252 hci_connection_timestamp(conn); 253 } 254 } 255 256 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 257 hci_connection_t * conn = hci_connection_for_handle(handle); 258 if (!conn) return 0; 259 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 260 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 261 return 0; 262 } 263 264 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 265 if (hci_stack->link_key_db) { 266 hci_stack->link_key_db->delete_link_key(addr); 267 } 268 } 269 270 static int hci_is_le_connection(hci_connection_t * connection){ 271 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 272 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 273 } 274 275 276 /** 277 * count connections 278 */ 279 static int nr_hci_connections(void){ 280 int count = 0; 281 btstack_linked_item_t *it; 282 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 283 return count; 284 } 285 286 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 287 288 int num_packets_sent_classic = 0; 289 int num_packets_sent_le = 0; 290 291 btstack_linked_item_t *it; 292 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 293 hci_connection_t * connection = (hci_connection_t *) it; 294 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 295 num_packets_sent_classic += connection->num_acl_packets_sent; 296 } else { 297 num_packets_sent_le += connection->num_acl_packets_sent; 298 } 299 } 300 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 301 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 302 int free_slots_le = 0; 303 304 if (free_slots_classic < 0){ 305 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); 306 return 0; 307 } 308 309 if (hci_stack->le_acl_packets_total_num){ 310 // if we have LE slots, they are used 311 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 312 if (free_slots_le < 0){ 313 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); 314 return 0; 315 } 316 } else { 317 // otherwise, classic slots are used for LE, too 318 free_slots_classic -= num_packets_sent_le; 319 if (free_slots_classic < 0){ 320 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); 321 return 0; 322 } 323 } 324 325 switch (address_type){ 326 case BD_ADDR_TYPE_UNKNOWN: 327 log_error("hci_number_free_acl_slots: unknown address type"); 328 return 0; 329 330 case BD_ADDR_TYPE_CLASSIC: 331 return free_slots_classic; 332 333 default: 334 if (hci_stack->le_acl_packets_total_num){ 335 return free_slots_le; 336 } 337 return free_slots_classic; 338 } 339 } 340 341 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 342 // get connection type 343 hci_connection_t * connection = hci_connection_for_handle(con_handle); 344 if (!connection){ 345 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 346 return 0; 347 } 348 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 349 } 350 351 static int hci_number_free_sco_slots(void){ 352 int num_sco_packets_sent = 0; 353 btstack_linked_item_t *it; 354 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 355 hci_connection_t * connection = (hci_connection_t *) it; 356 num_sco_packets_sent += connection->num_sco_packets_sent; 357 } 358 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 359 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 360 return 0; 361 } 362 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 363 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 364 } 365 366 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 367 int hci_can_send_command_packet_now(void){ 368 if (hci_stack->hci_packet_buffer_reserved) return 0; 369 370 // check for async hci transport implementations 371 if (hci_stack->hci_transport->can_send_packet_now){ 372 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 373 return 0; 374 } 375 } 376 377 return hci_stack->num_cmd_packets > 0; 378 } 379 380 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 381 // check for async hci transport implementations 382 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 383 return hci_stack->hci_transport->can_send_packet_now(packet_type); 384 } 385 386 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 387 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 388 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 389 } 390 391 int hci_can_send_acl_classic_packet_now(void){ 392 if (hci_stack->hci_packet_buffer_reserved) return 0; 393 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 394 } 395 396 int hci_can_send_acl_le_packet_now(void){ 397 if (hci_stack->hci_packet_buffer_reserved) return 0; 398 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 399 } 400 401 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 402 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 403 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 404 } 405 406 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 407 if (hci_stack->hci_packet_buffer_reserved) return 0; 408 return hci_can_send_prepared_acl_packet_now(con_handle); 409 } 410 411 int hci_can_send_prepared_sco_packet_now(void){ 412 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 413 if (!hci_stack->synchronous_flow_control_enabled) return 1; 414 return hci_number_free_sco_slots() > 0; 415 } 416 417 int hci_can_send_sco_packet_now(void){ 418 if (hci_stack->hci_packet_buffer_reserved) return 0; 419 return hci_can_send_prepared_sco_packet_now(); 420 } 421 422 void hci_request_sco_can_send_now_event(void){ 423 hci_stack->sco_waiting_for_can_send_now = 1; 424 hci_notify_if_sco_can_send_now(); 425 } 426 427 // used for internal checks in l2cap.c 428 int hci_is_packet_buffer_reserved(void){ 429 return hci_stack->hci_packet_buffer_reserved; 430 } 431 432 // reserves outgoing packet buffer. @returns 1 if successful 433 int hci_reserve_packet_buffer(void){ 434 if (hci_stack->hci_packet_buffer_reserved) { 435 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 436 return 0; 437 } 438 hci_stack->hci_packet_buffer_reserved = 1; 439 return 1; 440 } 441 442 void hci_release_packet_buffer(void){ 443 hci_stack->hci_packet_buffer_reserved = 0; 444 } 445 446 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 447 static int hci_transport_synchronous(void){ 448 return hci_stack->hci_transport->can_send_packet_now == NULL; 449 } 450 451 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 452 453 // 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); 454 455 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 456 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 457 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 458 max_acl_data_packet_length = hci_stack->le_data_packets_length; 459 } 460 461 // testing: reduce buffer to minimum 462 // max_acl_data_packet_length = 52; 463 464 log_debug("hci_send_acl_packet_fragments entered"); 465 466 int err; 467 // multiple packets could be send on a synchronous HCI transport 468 while (1){ 469 470 log_debug("hci_send_acl_packet_fragments loop entered"); 471 472 // get current data 473 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 474 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 475 int more_fragments = 0; 476 477 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 478 if (current_acl_data_packet_length > max_acl_data_packet_length){ 479 more_fragments = 1; 480 current_acl_data_packet_length = max_acl_data_packet_length; 481 } 482 483 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 484 if (acl_header_pos > 0){ 485 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 486 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 487 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 488 } 489 490 // update header len 491 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 492 493 // count packet 494 connection->num_acl_packets_sent++; 495 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %u)", more_fragments); 496 497 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 498 if (more_fragments){ 499 // update start of next fragment to send 500 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 501 } else { 502 // done 503 hci_stack->acl_fragmentation_pos = 0; 504 hci_stack->acl_fragmentation_total_size = 0; 505 } 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 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %u)", more_fragments); 514 515 // done yet? 516 if (!more_fragments) break; 517 518 // can send more? 519 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 520 } 521 522 log_debug("hci_send_acl_packet_fragments loop over"); 523 524 // release buffer now for synchronous transport 525 if (hci_transport_synchronous()){ 526 hci_release_packet_buffer(); 527 // notify upper stack that it might be possible to send again 528 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 529 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 530 } 531 532 return err; 533 } 534 535 // pre: caller has reserved the packet buffer 536 int hci_send_acl_packet_buffer(int size){ 537 538 // log_info("hci_send_acl_packet_buffer size %u", size); 539 540 if (!hci_stack->hci_packet_buffer_reserved) { 541 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 542 return 0; 543 } 544 545 uint8_t * packet = hci_stack->hci_packet_buffer; 546 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 547 548 // check for free places on Bluetooth module 549 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 550 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 551 hci_release_packet_buffer(); 552 return BTSTACK_ACL_BUFFERS_FULL; 553 } 554 555 hci_connection_t *connection = hci_connection_for_handle( con_handle); 556 if (!connection) { 557 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 558 hci_release_packet_buffer(); 559 return 0; 560 } 561 hci_connection_timestamp(connection); 562 563 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 564 565 // setup data 566 hci_stack->acl_fragmentation_total_size = size; 567 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 568 569 return hci_send_acl_packet_fragments(connection); 570 } 571 572 // pre: caller has reserved the packet buffer 573 int hci_send_sco_packet_buffer(int size){ 574 575 // log_info("hci_send_acl_packet_buffer size %u", size); 576 577 if (!hci_stack->hci_packet_buffer_reserved) { 578 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 579 return 0; 580 } 581 582 uint8_t * packet = hci_stack->hci_packet_buffer; 583 584 // skip checks in loopback mode 585 if (!hci_stack->loopback_mode){ 586 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 587 588 // check for free places on Bluetooth module 589 if (!hci_can_send_prepared_sco_packet_now()) { 590 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 591 hci_release_packet_buffer(); 592 return BTSTACK_ACL_BUFFERS_FULL; 593 } 594 595 // track send packet in connection struct 596 hci_connection_t *connection = hci_connection_for_handle( con_handle); 597 if (!connection) { 598 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 599 hci_release_packet_buffer(); 600 return 0; 601 } 602 connection->num_sco_packets_sent++; 603 } 604 605 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 606 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 607 608 if (hci_transport_synchronous()){ 609 hci_release_packet_buffer(); 610 // notify upper stack that it might be possible to send again 611 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 612 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 613 } 614 615 return err; 616 } 617 618 static void acl_handler(uint8_t *packet, int size){ 619 620 // log_info("acl_handler: size %u", size); 621 622 // get info 623 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 624 hci_connection_t *conn = hci_connection_for_handle(con_handle); 625 uint8_t acl_flags = READ_ACL_FLAGS(packet); 626 uint16_t acl_length = READ_ACL_LENGTH(packet); 627 628 // ignore non-registered handle 629 if (!conn){ 630 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 631 return; 632 } 633 634 // assert packet is complete 635 if (acl_length + 4 != size){ 636 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 637 return; 638 } 639 640 // update idle timestamp 641 hci_connection_timestamp(conn); 642 643 // handle different packet types 644 switch (acl_flags & 0x03) { 645 646 case 0x01: // continuation fragment 647 648 // sanity checks 649 if (conn->acl_recombination_pos == 0) { 650 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 651 return; 652 } 653 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 654 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 655 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 656 conn->acl_recombination_pos = 0; 657 return; 658 } 659 660 // append fragment payload (header already stored) 661 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 662 conn->acl_recombination_pos += acl_length; 663 664 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 665 // conn->acl_recombination_pos, conn->acl_recombination_length); 666 667 // forward complete L2CAP packet if complete. 668 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 669 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 670 // reset recombination buffer 671 conn->acl_recombination_length = 0; 672 conn->acl_recombination_pos = 0; 673 } 674 break; 675 676 case 0x02: { // first fragment 677 678 // sanity check 679 if (conn->acl_recombination_pos) { 680 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 681 conn->acl_recombination_pos = 0; 682 } 683 684 // peek into L2CAP packet! 685 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 686 687 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 688 689 // compare fragment size to L2CAP packet size 690 if (acl_length >= l2cap_length + 4){ 691 // forward fragment as L2CAP packet 692 hci_emit_acl_packet(packet, acl_length + 4); 693 } else { 694 695 if (acl_length > HCI_ACL_BUFFER_SIZE){ 696 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 697 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 698 return; 699 } 700 701 // store first fragment and tweak acl length for complete package 702 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 703 conn->acl_recombination_pos = acl_length + 4; 704 conn->acl_recombination_length = l2cap_length; 705 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 706 } 707 break; 708 709 } 710 default: 711 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 712 return; 713 } 714 715 // execute main loop 716 hci_run(); 717 } 718 719 static void hci_shutdown_connection(hci_connection_t *conn){ 720 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 721 722 btstack_run_loop_remove_timer(&conn->timeout); 723 724 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 725 btstack_memory_hci_connection_free( conn ); 726 727 // now it's gone 728 hci_emit_nr_connections_changed(); 729 } 730 731 static const uint16_t packet_type_sizes[] = { 732 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 733 HCI_ACL_DH1_SIZE, 0, 0, 0, 734 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 735 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 736 }; 737 static const uint8_t packet_type_feature_requirement_bit[] = { 738 0, // 3 slot packets 739 1, // 5 slot packets 740 25, // EDR 2 mpbs 741 26, // EDR 3 mbps 742 39, // 3 slot EDR packts 743 40, // 5 slot EDR packet 744 }; 745 static const uint16_t packet_type_feature_packet_mask[] = { 746 0x0f00, // 3 slot packets 747 0xf000, // 5 slot packets 748 0x1102, // EDR 2 mpbs 749 0x2204, // EDR 3 mbps 750 0x0300, // 3 slot EDR packts 751 0x3000, // 5 slot EDR packet 752 }; 753 754 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 755 // enable packet types based on size 756 uint16_t packet_types = 0; 757 unsigned int i; 758 for (i=0;i<16;i++){ 759 if (packet_type_sizes[i] == 0) continue; 760 if (packet_type_sizes[i] <= buffer_size){ 761 packet_types |= 1 << i; 762 } 763 } 764 // disable packet types due to missing local supported features 765 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 766 int bit_idx = packet_type_feature_requirement_bit[i]; 767 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 768 if (feature_set) continue; 769 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 770 packet_types &= ~packet_type_feature_packet_mask[i]; 771 } 772 // flip bits for "may not be used" 773 packet_types ^= 0x3306; 774 return packet_types; 775 } 776 777 uint16_t hci_usable_acl_packet_types(void){ 778 return hci_stack->packet_types; 779 } 780 781 uint8_t* hci_get_outgoing_packet_buffer(void){ 782 // hci packet buffer is >= acl data packet length 783 return hci_stack->hci_packet_buffer; 784 } 785 786 uint16_t hci_max_acl_data_packet_length(void){ 787 return hci_stack->acl_data_packet_length; 788 } 789 790 int hci_non_flushable_packet_boundary_flag_supported(void){ 791 // No. 54, byte 6, bit 6 792 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 793 } 794 795 static int gap_ssp_supported(void){ 796 // No. 51, byte 6, bit 3 797 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 798 } 799 800 static int hci_classic_supported(void){ 801 // No. 37, byte 4, bit 5, = No BR/EDR Support 802 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 803 } 804 805 static int hci_le_supported(void){ 806 #ifdef ENABLE_BLE 807 // No. 37, byte 4, bit 6 = LE Supported (Controller) 808 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 809 #else 810 return 0; 811 #endif 812 } 813 814 // get addr type and address used in advertisement packets 815 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 816 *addr_type = hci_stack->adv_addr_type; 817 if (hci_stack->adv_addr_type){ 818 memcpy(addr, hci_stack->adv_address, 6); 819 } else { 820 memcpy(addr, hci_stack->local_bd_addr, 6); 821 } 822 } 823 824 #ifdef ENABLE_BLE 825 void le_handle_advertisement_report(uint8_t *packet, int size){ 826 int offset = 3; 827 int num_reports = packet[offset]; 828 offset += 1; 829 830 int i; 831 // log_info("HCI: handle adv report with num reports: %d", num_reports); 832 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 833 for (i=0; i<num_reports;i++){ 834 uint8_t data_length = packet[offset + 8]; 835 uint8_t event_size = 10 + data_length; 836 int pos = 0; 837 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 838 event[pos++] = event_size; 839 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 840 offset += 8; 841 pos += 8; 842 event[pos++] = packet[offset + 1 + data_length]; // rssi 843 event[pos++] = packet[offset++]; //data_length; 844 memcpy(&event[pos], &packet[offset], data_length); 845 pos += data_length; 846 offset += data_length + 1; // rssi 847 hci_emit_event(event, pos, 1); 848 } 849 } 850 #endif 851 852 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 853 if (!hci_stack->config) return 0; 854 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 855 // Limit baud rate for Broadcom chipsets to 3 mbps 856 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 857 baud_rate = 3000000; 858 } 859 return baud_rate; 860 } 861 862 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 863 switch (hci_stack->substate){ 864 case HCI_INIT_W4_SEND_RESET: 865 log_info("Resend HCI Reset"); 866 hci_stack->substate = HCI_INIT_SEND_RESET; 867 hci_stack->num_cmd_packets = 1; 868 hci_run(); 869 break; 870 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 871 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 872 if (hci_stack->hci_transport->reset_link){ 873 hci_stack->hci_transport->reset_link(); 874 } 875 // NOTE: explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 876 877 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 878 log_info("Resend HCI Reset - CSR Warm Boot"); 879 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 880 hci_stack->num_cmd_packets = 1; 881 hci_run(); 882 break; 883 case HCI_INIT_W4_SEND_BAUD_CHANGE: { 884 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 885 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 886 hci_stack->hci_transport->set_baudrate(baud_rate); 887 // For CSR, HCI Reset is sent on new baud rate 888 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 889 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 890 hci_run(); 891 } 892 break; 893 } 894 default: 895 break; 896 } 897 } 898 899 static void hci_initializing_next_state(void){ 900 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 901 } 902 903 // assumption: hci_can_send_command_packet_now() == true 904 static void hci_initializing_run(void){ 905 log_info("hci_initializing_run: substate %u", hci_stack->substate); 906 switch (hci_stack->substate){ 907 case HCI_INIT_SEND_RESET: 908 hci_state_reset(); 909 910 #ifndef HAVE_PLATFORM_IPHONE_OS 911 // prepare reset if command complete not received in 100ms 912 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 913 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 914 btstack_run_loop_add_timer(&hci_stack->timeout); 915 #endif 916 // send command 917 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 918 hci_send_cmd(&hci_reset); 919 break; 920 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 921 hci_send_cmd(&hci_read_local_version_information); 922 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 923 break; 924 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 925 hci_state_reset(); 926 // prepare reset if command complete not received in 100ms 927 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 928 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 929 btstack_run_loop_add_timer(&hci_stack->timeout); 930 // send command 931 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 932 hci_send_cmd(&hci_reset); 933 break; 934 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 935 hci_state_reset(); 936 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 937 hci_send_cmd(&hci_reset); 938 break; 939 case HCI_INIT_SEND_BAUD_CHANGE: { 940 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 941 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 942 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 943 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 944 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 945 // STLC25000D: baudrate change happens within 0.5 s after command was send, 946 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 947 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 948 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 949 btstack_run_loop_add_timer(&hci_stack->timeout); 950 } 951 break; 952 } 953 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 954 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 955 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 956 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 957 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 958 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 959 break; 960 } 961 case HCI_INIT_CUSTOM_INIT: 962 log_info("Custom init"); 963 // Custom initialization 964 if (hci_stack->chipset && hci_stack->chipset->next_command){ 965 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 966 if (valid_cmd){ 967 int size = 3 + hci_stack->hci_packet_buffer[2]; 968 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 969 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 970 switch (valid_cmd) { 971 case 1: 972 default: 973 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 974 break; 975 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 976 log_info("CSR Warm Boot"); 977 btstack_run_loop_set_timer(&hci_stack->timeout, 100); 978 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 979 btstack_run_loop_add_timer(&hci_stack->timeout); 980 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 981 && hci_stack->config 982 && hci_stack->chipset 983 // && hci_stack->chipset->set_baudrate_command -- there's no such command 984 && hci_stack->hci_transport->set_baudrate 985 && hci_transport_uart_get_main_baud_rate()){ 986 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 987 } else { 988 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 989 } 990 break; 991 } 992 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 993 break; 994 } 995 log_info("hci_run: init script done"); 996 997 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 998 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 999 int need_baud_change = hci_stack->config 1000 && hci_stack->chipset 1001 && hci_stack->chipset->set_baudrate_command 1002 && hci_stack->hci_transport->set_baudrate 1003 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1004 if (need_baud_change) { 1005 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1006 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1007 hci_stack->hci_transport->set_baudrate(baud_rate); 1008 } 1009 } 1010 } 1011 // otherwise continue 1012 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1013 hci_send_cmd(&hci_read_local_supported_commands); 1014 break; 1015 case HCI_INIT_SET_BD_ADDR: 1016 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1017 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1018 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1019 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1020 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1021 break; 1022 case HCI_INIT_READ_BD_ADDR: 1023 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1024 hci_send_cmd(&hci_read_bd_addr); 1025 break; 1026 case HCI_INIT_READ_BUFFER_SIZE: 1027 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1028 hci_send_cmd(&hci_read_buffer_size); 1029 break; 1030 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1031 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1032 hci_send_cmd(&hci_read_local_supported_features); 1033 break; 1034 case HCI_INIT_SET_EVENT_MASK: 1035 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1036 if (hci_le_supported()){ 1037 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1038 } else { 1039 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1040 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1041 } 1042 break; 1043 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1044 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1045 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1046 break; 1047 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1048 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1049 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1050 break; 1051 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1052 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1053 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1054 break; 1055 case HCI_INIT_WRITE_LOCAL_NAME: 1056 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1057 if (hci_stack->local_name){ 1058 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1059 } else { 1060 char local_name[30]; 1061 // BTstack-11:22:33:44:55:66 1062 strcpy(local_name, "BTstack "); 1063 strcat(local_name, bd_addr_to_str(hci_stack->local_bd_addr)); 1064 log_info("---> Name %s", local_name); 1065 hci_send_cmd(&hci_write_local_name, local_name); 1066 } 1067 break; 1068 case HCI_INIT_WRITE_SCAN_ENABLE: 1069 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1070 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1071 break; 1072 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1073 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1074 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1075 break; 1076 #ifdef ENABLE_BLE 1077 // LE INIT 1078 case HCI_INIT_LE_READ_BUFFER_SIZE: 1079 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1080 hci_send_cmd(&hci_le_read_buffer_size); 1081 break; 1082 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1083 // LE Supported Host = 1, Simultaneous Host = 0 1084 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1085 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1086 break; 1087 case HCI_INIT_READ_WHITE_LIST_SIZE: 1088 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1089 hci_send_cmd(&hci_le_read_white_list_size); 1090 break; 1091 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1092 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1093 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1094 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1095 break; 1096 #endif 1097 default: 1098 return; 1099 } 1100 } 1101 1102 static void hci_init_done(void){ 1103 // done. tell the app 1104 log_info("hci_init_done -> HCI_STATE_WORKING"); 1105 hci_stack->state = HCI_STATE_WORKING; 1106 hci_emit_state(); 1107 hci_run(); 1108 } 1109 1110 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1111 uint8_t command_completed = 0; 1112 1113 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1114 uint16_t opcode = little_endian_read_16(packet,3); 1115 if (opcode == hci_stack->last_cmd_opcode){ 1116 command_completed = 1; 1117 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1118 } else { 1119 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1120 } 1121 } 1122 1123 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1124 uint8_t status = packet[2]; 1125 uint16_t opcode = little_endian_read_16(packet,4); 1126 if (opcode == hci_stack->last_cmd_opcode){ 1127 if (status){ 1128 command_completed = 1; 1129 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1130 } else { 1131 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1132 } 1133 } else { 1134 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1135 } 1136 } 1137 1138 // Vendor == CSR 1139 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1140 // TODO: track actual command 1141 command_completed = 1; 1142 } 1143 1144 // Vendor == Toshiba 1145 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1146 // TODO: track actual command 1147 command_completed = 1; 1148 } 1149 1150 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1151 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1152 // 1153 // HCI Reset 1154 // Timeout 100 ms 1155 // HCI Reset 1156 // Command Complete Reset 1157 // HCI Read Local Version Information 1158 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1159 // hang... 1160 // 1161 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1162 if (!command_completed 1163 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1164 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1165 1166 uint16_t opcode = little_endian_read_16(packet,3); 1167 if (opcode == hci_reset.opcode){ 1168 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1169 return; 1170 } 1171 } 1172 1173 // CSR & H5 1174 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1175 if (!command_completed 1176 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1177 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1178 1179 uint16_t opcode = little_endian_read_16(packet,3); 1180 if (opcode == hci_reset.opcode){ 1181 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1182 return; 1183 } 1184 } 1185 1186 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1187 // fix: Correct substate and behave as command below 1188 if (command_completed){ 1189 switch (hci_stack->substate){ 1190 case HCI_INIT_SEND_RESET: 1191 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1192 break; 1193 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1194 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1195 break; 1196 default: 1197 break; 1198 } 1199 } 1200 1201 1202 if (!command_completed) return; 1203 1204 int need_baud_change = hci_stack->config 1205 && hci_stack->chipset 1206 && hci_stack->chipset->set_baudrate_command 1207 && hci_stack->hci_transport->set_baudrate 1208 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1209 1210 int need_addr_change = hci_stack->custom_bd_addr_set 1211 && hci_stack->chipset 1212 && hci_stack->chipset->set_bd_addr_command; 1213 1214 switch(hci_stack->substate){ 1215 case HCI_INIT_SEND_RESET: 1216 // on CSR with H5/BCSP, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1217 // fix: just correct substate and behave as command below 1218 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1219 btstack_run_loop_remove_timer(&hci_stack->timeout); 1220 break; 1221 case HCI_INIT_W4_SEND_RESET: 1222 btstack_run_loop_remove_timer(&hci_stack->timeout); 1223 break; 1224 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 log_info("Received local version info, need baud change %u", need_baud_change); 1226 if (need_baud_change){ 1227 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1228 return; 1229 } 1230 // skip baud change 1231 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1232 return; 1233 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1234 // for STLC2500D, baud rate change already happened. 1235 // for others, baud rate gets changed now 1236 if (hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS){ 1237 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1238 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1239 hci_stack->hci_transport->set_baudrate(baud_rate); 1240 } 1241 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1242 return; 1243 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1244 btstack_run_loop_remove_timer(&hci_stack->timeout); 1245 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1246 return; 1247 case HCI_INIT_W4_CUSTOM_INIT: 1248 // repeat custom init 1249 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1250 return; 1251 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1252 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1253 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1254 return; 1255 } 1256 if (need_addr_change){ 1257 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1258 return; 1259 } 1260 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1261 return; 1262 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: { 1263 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1264 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1265 hci_stack->hci_transport->set_baudrate(baud_rate); 1266 if (need_addr_change){ 1267 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1268 return; 1269 } 1270 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1271 return; 1272 } 1273 case HCI_INIT_W4_SET_BD_ADDR: 1274 // for STLC2500D, bd addr change only gets active after sending reset command 1275 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1276 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1277 return; 1278 } 1279 // skipping st warm boot 1280 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1281 return; 1282 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1283 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1284 return; 1285 case HCI_INIT_W4_READ_BD_ADDR: 1286 // only read buffer size if supported 1287 if (hci_stack->local_supported_commands[0] & 0x01) { 1288 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1289 return; 1290 } 1291 // skipping read buffer size 1292 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1293 return; 1294 case HCI_INIT_W4_SET_EVENT_MASK: 1295 // skip Classic init commands for LE only chipsets 1296 if (!hci_classic_supported()){ 1297 if (hci_le_supported()){ 1298 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1299 return; 1300 } else { 1301 log_error("Neither BR/EDR nor LE supported"); 1302 hci_init_done(); 1303 return; 1304 } 1305 } 1306 if (!gap_ssp_supported()){ 1307 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1308 return; 1309 } 1310 break; 1311 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1312 break; 1313 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1314 // skip write le host if not supported (e.g. on LE only EM9301) 1315 if (hci_stack->local_supported_commands[0] & 0x02) break; 1316 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1317 return; 1318 1319 #ifdef ENABLE_SCO_OVER_HCI 1320 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1321 // just go to next state 1322 break; 1323 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1324 if (!hci_le_supported()){ 1325 // SKIP LE init for Classic only configuration 1326 hci_init_done(); 1327 return; 1328 } 1329 break; 1330 #else 1331 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1332 if (!hci_le_supported()){ 1333 // SKIP LE init for Classic only configuration 1334 hci_init_done(); 1335 return; 1336 } 1337 #endif 1338 break; 1339 // Response to command before init done state -> init done 1340 case (HCI_INIT_DONE-1): 1341 hci_init_done(); 1342 return; 1343 1344 default: 1345 break; 1346 } 1347 hci_initializing_next_state(); 1348 } 1349 1350 static void event_handler(uint8_t *packet, int size){ 1351 1352 uint16_t event_length = packet[1]; 1353 1354 // assert packet is complete 1355 if (size != event_length + 2){ 1356 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1357 return; 1358 } 1359 1360 bd_addr_t addr; 1361 bd_addr_type_t addr_type; 1362 uint8_t link_type; 1363 hci_con_handle_t handle; 1364 hci_connection_t * conn; 1365 int i; 1366 1367 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1368 1369 switch (hci_event_packet_get_type(packet)) { 1370 1371 case HCI_EVENT_COMMAND_COMPLETE: 1372 // get num cmd packets 1373 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1374 hci_stack->num_cmd_packets = packet[2]; 1375 1376 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1377 // from offset 5 1378 // status 1379 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1380 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1381 hci_stack->sco_data_packet_length = packet[8]; 1382 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1383 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1384 1385 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1386 // determine usable ACL payload size 1387 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1388 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1389 } 1390 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1391 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1392 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1393 } 1394 } 1395 #ifdef ENABLE_BLE 1396 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1397 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1398 hci_stack->le_acl_packets_total_num = packet[8]; 1399 // determine usable ACL payload size 1400 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1401 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1402 } 1403 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1404 } 1405 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1406 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1407 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1408 } 1409 #endif 1410 // Dump local address 1411 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1412 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1413 hci_stack->local_bd_addr); 1414 log_info("Local Address, Status: 0x%02x: Addr: %s", 1415 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1416 } 1417 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1418 hci_emit_discoverable_enabled(hci_stack->discoverable); 1419 } 1420 // Note: HCI init checks 1421 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1422 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1423 1424 // determine usable ACL packet types based on host buffer size and supported features 1425 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1426 log_info("packet types %04x", hci_stack->packet_types); 1427 1428 // Classic/LE 1429 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1430 } 1431 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1432 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1433 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1434 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1435 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1436 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1437 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1438 // notify app 1439 if (hci_stack->local_version_information_callback){ 1440 hci_stack->local_version_information_callback(packet); 1441 } 1442 } 1443 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1444 hci_stack->local_supported_commands[0] = 1445 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1446 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1447 } 1448 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1449 if (packet[5] == 0){ 1450 hci_stack->synchronous_flow_control_enabled = 1; 1451 } 1452 } 1453 break; 1454 1455 case HCI_EVENT_COMMAND_STATUS: 1456 // get num cmd packets 1457 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1458 hci_stack->num_cmd_packets = packet[3]; 1459 break; 1460 1461 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1462 int offset = 3; 1463 for (i=0; i<packet[2];i++){ 1464 handle = little_endian_read_16(packet, offset); 1465 offset += 2; 1466 uint16_t num_packets = little_endian_read_16(packet, offset); 1467 offset += 2; 1468 1469 conn = hci_connection_for_handle(handle); 1470 if (!conn){ 1471 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1472 continue; 1473 } 1474 1475 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1476 if (conn->num_sco_packets_sent >= num_packets){ 1477 conn->num_sco_packets_sent -= num_packets; 1478 } else { 1479 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1480 conn->num_sco_packets_sent = 0; 1481 } 1482 hci_notify_if_sco_can_send_now(); 1483 } else { 1484 if (conn->num_acl_packets_sent >= num_packets){ 1485 conn->num_acl_packets_sent -= num_packets; 1486 } else { 1487 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1488 conn->num_acl_packets_sent = 0; 1489 } 1490 } 1491 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1492 } 1493 break; 1494 } 1495 case HCI_EVENT_CONNECTION_REQUEST: 1496 reverse_bd_addr(&packet[2], addr); 1497 // TODO: eval COD 8-10 1498 link_type = packet[11]; 1499 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1500 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1501 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1502 if (!conn) { 1503 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1504 } 1505 if (!conn) { 1506 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1507 hci_stack->decline_reason = 0x0d; 1508 bd_addr_copy(hci_stack->decline_addr, addr); 1509 break; 1510 } 1511 conn->role = HCI_ROLE_SLAVE; 1512 conn->state = RECEIVED_CONNECTION_REQUEST; 1513 // store info about eSCO 1514 if (link_type == 0x02){ 1515 conn->remote_supported_feature_eSCO = 1; 1516 } 1517 hci_run(); 1518 break; 1519 1520 case HCI_EVENT_CONNECTION_COMPLETE: 1521 // Connection management 1522 reverse_bd_addr(&packet[5], addr); 1523 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1524 addr_type = BD_ADDR_TYPE_CLASSIC; 1525 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1526 if (conn) { 1527 if (!packet[2]){ 1528 conn->state = OPEN; 1529 conn->con_handle = little_endian_read_16(packet, 3); 1530 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1531 1532 // restart timer 1533 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1534 btstack_run_loop_add_timer(&conn->timeout); 1535 1536 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1537 1538 hci_emit_nr_connections_changed(); 1539 } else { 1540 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1541 uint8_t status = packet[2]; 1542 bd_addr_t bd_address; 1543 memcpy(&bd_address, conn->address, 6); 1544 1545 // connection failed, remove entry 1546 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1547 btstack_memory_hci_connection_free( conn ); 1548 1549 // notify client if dedicated bonding 1550 if (notify_dedicated_bonding_failed){ 1551 log_info("hci notify_dedicated_bonding_failed"); 1552 hci_emit_dedicated_bonding_result(bd_address, status); 1553 } 1554 1555 // if authentication error, also delete link key 1556 if (packet[2] == 0x05) { 1557 gap_drop_link_key_for_bd_addr(addr); 1558 } 1559 } 1560 } 1561 break; 1562 1563 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1564 reverse_bd_addr(&packet[5], addr); 1565 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1566 if (packet[2]){ 1567 // connection failed 1568 break; 1569 } 1570 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1571 if (!conn) { 1572 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1573 } 1574 if (!conn) { 1575 break; 1576 } 1577 conn->state = OPEN; 1578 conn->con_handle = little_endian_read_16(packet, 3); 1579 break; 1580 1581 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1582 handle = little_endian_read_16(packet, 3); 1583 conn = hci_connection_for_handle(handle); 1584 if (!conn) break; 1585 if (!packet[2]){ 1586 uint8_t * features = &packet[5]; 1587 if (features[6] & (1 << 3)){ 1588 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1589 } 1590 if (features[3] & (1<<7)){ 1591 conn->remote_supported_feature_eSCO = 1; 1592 } 1593 } 1594 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1595 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1596 if (conn->bonding_flags & BONDING_DEDICATED){ 1597 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1598 } 1599 break; 1600 1601 case HCI_EVENT_LINK_KEY_REQUEST: 1602 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1603 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1604 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1605 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1606 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1607 hci_run(); 1608 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1609 return; 1610 1611 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1612 reverse_bd_addr(&packet[2], addr); 1613 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1614 if (!conn) break; 1615 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1616 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1617 // Change Connection Encryption keeps link key type 1618 if (link_key_type != CHANGED_COMBINATION_KEY){ 1619 conn->link_key_type = link_key_type; 1620 } 1621 if (!hci_stack->link_key_db) break; 1622 hci_stack->link_key_db->put_link_key(addr, &packet[8], conn->link_key_type); 1623 // still forward event to allow dismiss of pairing dialog 1624 break; 1625 } 1626 1627 case HCI_EVENT_PIN_CODE_REQUEST: 1628 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1629 // non-bondable mode: pin code negative reply will be sent 1630 if (!hci_stack->bondable){ 1631 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1632 hci_run(); 1633 return; 1634 } 1635 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1636 if (!hci_stack->link_key_db) break; 1637 hci_event_pin_code_request_get_bd_addr(packet, addr); 1638 hci_stack->link_key_db->delete_link_key(addr); 1639 break; 1640 1641 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1643 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1644 break; 1645 1646 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1647 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1648 if (!hci_stack->ssp_auto_accept) break; 1649 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1650 break; 1651 1652 case HCI_EVENT_USER_PASSKEY_REQUEST: 1653 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1654 if (!hci_stack->ssp_auto_accept) break; 1655 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1656 break; 1657 1658 case HCI_EVENT_ENCRYPTION_CHANGE: 1659 handle = little_endian_read_16(packet, 3); 1660 conn = hci_connection_for_handle(handle); 1661 if (!conn) break; 1662 if (packet[2] == 0) { 1663 if (packet[5]){ 1664 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1665 } else { 1666 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1667 } 1668 } 1669 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1670 break; 1671 1672 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1673 handle = little_endian_read_16(packet, 3); 1674 conn = hci_connection_for_handle(handle); 1675 if (!conn) break; 1676 1677 // dedicated bonding: send result and disconnect 1678 if (conn->bonding_flags & BONDING_DEDICATED){ 1679 conn->bonding_flags &= ~BONDING_DEDICATED; 1680 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1681 conn->bonding_status = packet[2]; 1682 break; 1683 } 1684 1685 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1686 // link key sufficient for requested security 1687 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1688 break; 1689 } 1690 // not enough 1691 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1692 break; 1693 1694 // HCI_EVENT_DISCONNECTION_COMPLETE 1695 // has been split, to first notify stack before shutting connection down 1696 // see end of function, too. 1697 case HCI_EVENT_DISCONNECTION_COMPLETE: 1698 if (packet[2]) break; // status != 0 1699 handle = little_endian_read_16(packet, 3); 1700 conn = hci_connection_for_handle(handle); 1701 if (!conn) break; // no conn struct anymore 1702 // re-enable advertisements for le connections if active 1703 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1704 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1705 } 1706 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1707 break; 1708 1709 case HCI_EVENT_HARDWARE_ERROR: 1710 if (hci_stack->hardware_error_callback){ 1711 (*hci_stack->hardware_error_callback)(); 1712 } else { 1713 // if no special requests, just reboot stack 1714 hci_power_control_off(); 1715 hci_power_control_on(); 1716 } 1717 break; 1718 1719 case HCI_EVENT_ROLE_CHANGE: 1720 if (packet[2]) break; // status != 0 1721 handle = little_endian_read_16(packet, 3); 1722 conn = hci_connection_for_handle(handle); 1723 if (!conn) break; // no conn 1724 conn->role = packet[9]; 1725 break; 1726 1727 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1728 // release packet buffer only for asynchronous transport and if there are not further fragements 1729 if (hci_transport_synchronous()) { 1730 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1731 return; // instead of break: to avoid re-entering hci_run() 1732 } 1733 if (hci_stack->acl_fragmentation_total_size) break; 1734 hci_release_packet_buffer(); 1735 1736 // L2CAP receives this event via the hci_emit_event below 1737 1738 // For SCO, we do the can_send_now_check here 1739 hci_notify_if_sco_can_send_now(); 1740 break; 1741 1742 case HCI_EVENT_SCO_CAN_SEND_NOW: 1743 // For SCO, we do the can_send_now_check here 1744 hci_notify_if_sco_can_send_now(); 1745 return; 1746 1747 #ifdef ENABLE_BLE 1748 case HCI_EVENT_LE_META: 1749 switch (packet[2]){ 1750 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1751 // log_info("advertising report received"); 1752 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1753 le_handle_advertisement_report(packet, size); 1754 break; 1755 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1756 // Connection management 1757 reverse_bd_addr(&packet[8], addr); 1758 addr_type = (bd_addr_type_t)packet[7]; 1759 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1760 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1761 // if auto-connect, remove from whitelist in both roles 1762 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1763 hci_remove_from_whitelist(addr_type, addr); 1764 } 1765 // handle error: error is reported only to the initiator -> outgoing connection 1766 if (packet[3]){ 1767 // outgoing connection establishment is done 1768 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1769 // remove entry 1770 if (conn){ 1771 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1772 btstack_memory_hci_connection_free( conn ); 1773 } 1774 break; 1775 } 1776 // on success, both hosts receive connection complete event 1777 if (packet[6] == HCI_ROLE_MASTER){ 1778 // if we're master, it was an outgoing connection and we're done with it 1779 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1780 } else { 1781 // if we're slave, it was an incoming connection, advertisements have stopped 1782 hci_stack->le_advertisements_active = 0; 1783 } 1784 // LE connections are auto-accepted, so just create a connection if there isn't one already 1785 if (!conn){ 1786 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1787 } 1788 // no memory, sorry. 1789 if (!conn){ 1790 break; 1791 } 1792 1793 conn->state = OPEN; 1794 conn->role = packet[6]; 1795 conn->con_handle = little_endian_read_16(packet, 4); 1796 1797 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1798 1799 // restart timer 1800 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1801 // btstack_run_loop_add_timer(&conn->timeout); 1802 1803 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1804 1805 hci_emit_nr_connections_changed(); 1806 break; 1807 1808 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1809 1810 default: 1811 break; 1812 } 1813 break; 1814 #endif 1815 default: 1816 break; 1817 } 1818 1819 // handle BT initialization 1820 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1821 hci_initializing_event_handler(packet, size); 1822 } 1823 1824 // help with BT sleep 1825 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1826 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1827 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1828 hci_initializing_next_state(); 1829 } 1830 1831 // notify upper stack 1832 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1833 1834 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1835 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1836 if (!packet[2]){ 1837 handle = little_endian_read_16(packet, 3); 1838 hci_connection_t * aConn = hci_connection_for_handle(handle); 1839 if (aConn) { 1840 uint8_t status = aConn->bonding_status; 1841 uint16_t flags = aConn->bonding_flags; 1842 bd_addr_t bd_address; 1843 memcpy(&bd_address, aConn->address, 6); 1844 hci_shutdown_connection(aConn); 1845 // connection struct is gone, don't access anymore 1846 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1847 hci_emit_dedicated_bonding_result(bd_address, status); 1848 } 1849 } 1850 } 1851 } 1852 1853 // execute main loop 1854 hci_run(); 1855 } 1856 1857 static void sco_handler(uint8_t * packet, uint16_t size){ 1858 if (!hci_stack->sco_packet_handler) return; 1859 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, packet, size); 1860 } 1861 1862 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1863 hci_dump_packet(packet_type, 1, packet, size); 1864 switch (packet_type) { 1865 case HCI_EVENT_PACKET: 1866 event_handler(packet, size); 1867 break; 1868 case HCI_ACL_DATA_PACKET: 1869 acl_handler(packet, size); 1870 break; 1871 case HCI_SCO_DATA_PACKET: 1872 sco_handler(packet, size); 1873 default: 1874 break; 1875 } 1876 } 1877 1878 /** 1879 * @brief Add event packet handler. 1880 */ 1881 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1882 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1883 } 1884 1885 1886 /** Register HCI packet handlers */ 1887 void hci_register_acl_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1888 hci_stack->acl_packet_handler = handler; 1889 } 1890 1891 /** 1892 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1893 */ 1894 void hci_register_sco_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1895 hci_stack->sco_packet_handler = handler; 1896 } 1897 1898 static void hci_state_reset(void){ 1899 // no connections yet 1900 hci_stack->connections = NULL; 1901 1902 // keep discoverable/connectable as this has been requested by the client(s) 1903 // hci_stack->discoverable = 0; 1904 // hci_stack->connectable = 0; 1905 // hci_stack->bondable = 1; 1906 1907 // buffer is free 1908 hci_stack->hci_packet_buffer_reserved = 0; 1909 1910 // no pending cmds 1911 hci_stack->decline_reason = 0; 1912 hci_stack->new_scan_enable_value = 0xff; 1913 1914 // LE 1915 hci_stack->adv_addr_type = 0; 1916 memset(hci_stack->adv_address, 0, 6); 1917 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1918 hci_stack->le_scan_type = 0xff; 1919 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1920 hci_stack->le_whitelist = 0; 1921 hci_stack->le_whitelist_capacity = 0; 1922 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1923 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1924 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1925 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1926 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1927 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1928 } 1929 1930 /** 1931 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1932 */ 1933 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1934 // store and open remote device db 1935 hci_stack->link_key_db = link_key_db; 1936 if (hci_stack->link_key_db) { 1937 hci_stack->link_key_db->open(); 1938 } 1939 } 1940 1941 void hci_init(const hci_transport_t *transport, const void *config){ 1942 1943 #ifdef HAVE_MALLOC 1944 if (!hci_stack) { 1945 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1946 } 1947 #else 1948 hci_stack = &hci_stack_static; 1949 #endif 1950 memset(hci_stack, 0, sizeof(hci_stack_t)); 1951 1952 // reference to use transport layer implementation 1953 hci_stack->hci_transport = transport; 1954 1955 // reference to used config 1956 hci_stack->config = config; 1957 1958 // max acl payload size defined in config.h 1959 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1960 1961 // register packet handlers with transport 1962 transport->register_packet_handler(&packet_handler); 1963 1964 hci_stack->state = HCI_STATE_OFF; 1965 1966 // class of device 1967 hci_stack->class_of_device = 0x007a020c; // Smartphone 1968 1969 // bondable by default 1970 hci_stack->bondable = 1; 1971 1972 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1973 hci_stack->ssp_enable = 1; 1974 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1975 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1976 hci_stack->ssp_auto_accept = 1; 1977 1978 // voice setting - signed 8 bit pcm data with CVSD over the air 1979 hci_stack->sco_voice_setting = 0x40; 1980 1981 hci_state_reset(); 1982 } 1983 1984 /** 1985 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 1986 */ 1987 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 1988 hci_stack->chipset = chipset_driver; 1989 1990 // reset chipset driver - init is also called on power_up 1991 if (hci_stack->chipset && hci_stack->chipset->init){ 1992 hci_stack->chipset->init(hci_stack->config); 1993 } 1994 } 1995 1996 /** 1997 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 1998 */ 1999 void hci_set_control(const btstack_control_t *hardware_control){ 2000 // references to used control implementation 2001 hci_stack->control = hardware_control; 2002 // init with transport config 2003 hardware_control->init(hci_stack->config); 2004 } 2005 2006 void hci_close(void){ 2007 // close remote device db 2008 if (hci_stack->link_key_db) { 2009 hci_stack->link_key_db->close(); 2010 } 2011 while (hci_stack->connections) { 2012 // cancel all l2cap connections 2013 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 2014 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 2015 } 2016 hci_power_control(HCI_POWER_OFF); 2017 2018 #ifdef HAVE_MALLOC 2019 free(hci_stack); 2020 #endif 2021 hci_stack = NULL; 2022 } 2023 2024 void gap_set_class_of_device(uint32_t class_of_device){ 2025 hci_stack->class_of_device = class_of_device; 2026 } 2027 2028 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2029 void hci_set_bd_addr(bd_addr_t addr){ 2030 memcpy(hci_stack->custom_bd_addr, addr, 6); 2031 hci_stack->custom_bd_addr_set = 1; 2032 } 2033 2034 void hci_disable_l2cap_timeout_check(void){ 2035 disable_l2cap_timeouts = 1; 2036 } 2037 // State-Module-Driver overview 2038 // state module low-level 2039 // HCI_STATE_OFF off close 2040 // HCI_STATE_INITIALIZING, on open 2041 // HCI_STATE_WORKING, on open 2042 // HCI_STATE_HALTING, on open 2043 // HCI_STATE_SLEEPING, off/sleep close 2044 // HCI_STATE_FALLING_ASLEEP on open 2045 2046 static int hci_power_control_on(void){ 2047 2048 // power on 2049 int err = 0; 2050 if (hci_stack->control && hci_stack->control->on){ 2051 err = (*hci_stack->control->on)(); 2052 } 2053 if (err){ 2054 log_error( "POWER_ON failed"); 2055 hci_emit_hci_open_failed(); 2056 return err; 2057 } 2058 2059 // int chipset driver 2060 if (hci_stack->chipset && hci_stack->chipset->init){ 2061 hci_stack->chipset->init(hci_stack->config); 2062 } 2063 2064 // init transport 2065 if (hci_stack->hci_transport->init){ 2066 hci_stack->hci_transport->init(hci_stack->config); 2067 } 2068 2069 // open transport 2070 err = hci_stack->hci_transport->open(); 2071 if (err){ 2072 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2073 if (hci_stack->control && hci_stack->control->off){ 2074 (*hci_stack->control->off)(); 2075 } 2076 hci_emit_hci_open_failed(); 2077 return err; 2078 } 2079 return 0; 2080 } 2081 2082 static void hci_power_control_off(void){ 2083 2084 log_info("hci_power_control_off"); 2085 2086 // close low-level device 2087 hci_stack->hci_transport->close(); 2088 2089 log_info("hci_power_control_off - hci_transport closed"); 2090 2091 // power off 2092 if (hci_stack->control && hci_stack->control->off){ 2093 (*hci_stack->control->off)(); 2094 } 2095 2096 log_info("hci_power_control_off - control closed"); 2097 2098 hci_stack->state = HCI_STATE_OFF; 2099 } 2100 2101 static void hci_power_control_sleep(void){ 2102 2103 log_info("hci_power_control_sleep"); 2104 2105 #if 0 2106 // don't close serial port during sleep 2107 2108 // close low-level device 2109 hci_stack->hci_transport->close(hci_stack->config); 2110 #endif 2111 2112 // sleep mode 2113 if (hci_stack->control && hci_stack->control->sleep){ 2114 (*hci_stack->control->sleep)(); 2115 } 2116 2117 hci_stack->state = HCI_STATE_SLEEPING; 2118 } 2119 2120 static int hci_power_control_wake(void){ 2121 2122 log_info("hci_power_control_wake"); 2123 2124 // wake on 2125 if (hci_stack->control && hci_stack->control->wake){ 2126 (*hci_stack->control->wake)(); 2127 } 2128 2129 #if 0 2130 // open low-level device 2131 int err = hci_stack->hci_transport->open(hci_stack->config); 2132 if (err){ 2133 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2134 if (hci_stack->control && hci_stack->control->off){ 2135 (*hci_stack->control->off)(); 2136 } 2137 hci_emit_hci_open_failed(); 2138 return err; 2139 } 2140 #endif 2141 2142 return 0; 2143 } 2144 2145 static void hci_power_transition_to_initializing(void){ 2146 // set up state machine 2147 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2148 hci_stack->hci_packet_buffer_reserved = 0; 2149 hci_stack->state = HCI_STATE_INITIALIZING; 2150 hci_stack->substate = HCI_INIT_SEND_RESET; 2151 } 2152 2153 int hci_power_control(HCI_POWER_MODE power_mode){ 2154 2155 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2156 2157 int err = 0; 2158 switch (hci_stack->state){ 2159 2160 case HCI_STATE_OFF: 2161 switch (power_mode){ 2162 case HCI_POWER_ON: 2163 err = hci_power_control_on(); 2164 if (err) { 2165 log_error("hci_power_control_on() error %u", err); 2166 return err; 2167 } 2168 hci_power_transition_to_initializing(); 2169 break; 2170 case HCI_POWER_OFF: 2171 // do nothing 2172 break; 2173 case HCI_POWER_SLEEP: 2174 // do nothing (with SLEEP == OFF) 2175 break; 2176 } 2177 break; 2178 2179 case HCI_STATE_INITIALIZING: 2180 switch (power_mode){ 2181 case HCI_POWER_ON: 2182 // do nothing 2183 break; 2184 case HCI_POWER_OFF: 2185 // no connections yet, just turn it off 2186 hci_power_control_off(); 2187 break; 2188 case HCI_POWER_SLEEP: 2189 // no connections yet, just turn it off 2190 hci_power_control_sleep(); 2191 break; 2192 } 2193 break; 2194 2195 case HCI_STATE_WORKING: 2196 switch (power_mode){ 2197 case HCI_POWER_ON: 2198 // do nothing 2199 break; 2200 case HCI_POWER_OFF: 2201 // see hci_run 2202 hci_stack->state = HCI_STATE_HALTING; 2203 break; 2204 case HCI_POWER_SLEEP: 2205 // see hci_run 2206 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2207 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2208 break; 2209 } 2210 break; 2211 2212 case HCI_STATE_HALTING: 2213 switch (power_mode){ 2214 case HCI_POWER_ON: 2215 hci_power_transition_to_initializing(); 2216 break; 2217 case HCI_POWER_OFF: 2218 // do nothing 2219 break; 2220 case HCI_POWER_SLEEP: 2221 // see hci_run 2222 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2223 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2224 break; 2225 } 2226 break; 2227 2228 case HCI_STATE_FALLING_ASLEEP: 2229 switch (power_mode){ 2230 case HCI_POWER_ON: 2231 2232 #ifdef HAVE_PLATFORM_IPHONE_OS 2233 // nothing to do, if H4 supports power management 2234 if (btstack_control_iphone_power_management_enabled()){ 2235 hci_stack->state = HCI_STATE_INITIALIZING; 2236 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2237 break; 2238 } 2239 #endif 2240 hci_power_transition_to_initializing(); 2241 break; 2242 case HCI_POWER_OFF: 2243 // see hci_run 2244 hci_stack->state = HCI_STATE_HALTING; 2245 break; 2246 case HCI_POWER_SLEEP: 2247 // do nothing 2248 break; 2249 } 2250 break; 2251 2252 case HCI_STATE_SLEEPING: 2253 switch (power_mode){ 2254 case HCI_POWER_ON: 2255 2256 #ifdef HAVE_PLATFORM_IPHONE_OS 2257 // nothing to do, if H4 supports power management 2258 if (btstack_control_iphone_power_management_enabled()){ 2259 hci_stack->state = HCI_STATE_INITIALIZING; 2260 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2261 hci_update_scan_enable(); 2262 break; 2263 } 2264 #endif 2265 err = hci_power_control_wake(); 2266 if (err) return err; 2267 hci_power_transition_to_initializing(); 2268 break; 2269 case HCI_POWER_OFF: 2270 hci_stack->state = HCI_STATE_HALTING; 2271 break; 2272 case HCI_POWER_SLEEP: 2273 // do nothing 2274 break; 2275 } 2276 break; 2277 } 2278 2279 // create internal event 2280 hci_emit_state(); 2281 2282 // trigger next/first action 2283 hci_run(); 2284 2285 return 0; 2286 } 2287 2288 static void hci_update_scan_enable(void){ 2289 // 2 = page scan, 1 = inq scan 2290 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2291 hci_run(); 2292 } 2293 2294 void gap_discoverable_control(uint8_t enable){ 2295 if (enable) enable = 1; // normalize argument 2296 2297 if (hci_stack->discoverable == enable){ 2298 hci_emit_discoverable_enabled(hci_stack->discoverable); 2299 return; 2300 } 2301 2302 hci_stack->discoverable = enable; 2303 hci_update_scan_enable(); 2304 } 2305 2306 void gap_connectable_control(uint8_t enable){ 2307 if (enable) enable = 1; // normalize argument 2308 2309 // don't emit event 2310 if (hci_stack->connectable == enable) return; 2311 2312 hci_stack->connectable = enable; 2313 hci_update_scan_enable(); 2314 } 2315 2316 void gap_local_bd_addr(bd_addr_t address_buffer){ 2317 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2318 } 2319 2320 static void hci_run(void){ 2321 2322 // log_info("hci_run: entered"); 2323 btstack_linked_item_t * it; 2324 2325 // send continuation fragments first, as they block the prepared packet buffer 2326 if (hci_stack->acl_fragmentation_total_size > 0) { 2327 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2328 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2329 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2330 if (connection) { 2331 hci_send_acl_packet_fragments(connection); 2332 return; 2333 } 2334 // connection gone -> discard further fragments 2335 hci_stack->acl_fragmentation_total_size = 0; 2336 hci_stack->acl_fragmentation_pos = 0; 2337 } 2338 } 2339 2340 if (!hci_can_send_command_packet_now()) return; 2341 2342 // global/non-connection oriented commands 2343 2344 // decline incoming connections 2345 if (hci_stack->decline_reason){ 2346 uint8_t reason = hci_stack->decline_reason; 2347 hci_stack->decline_reason = 0; 2348 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2349 return; 2350 } 2351 2352 // send scan enable 2353 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2354 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2355 hci_stack->new_scan_enable_value = 0xff; 2356 return; 2357 } 2358 2359 #ifdef ENABLE_BLE 2360 if (hci_stack->state == HCI_STATE_WORKING){ 2361 // handle le scan 2362 switch(hci_stack->le_scanning_state){ 2363 case LE_START_SCAN: 2364 hci_stack->le_scanning_state = LE_SCANNING; 2365 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2366 return; 2367 2368 case LE_STOP_SCAN: 2369 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2370 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2371 return; 2372 default: 2373 break; 2374 } 2375 if (hci_stack->le_scan_type != 0xff){ 2376 // defaults: active scanning, accept all advertisement packets 2377 int scan_type = hci_stack->le_scan_type; 2378 hci_stack->le_scan_type = 0xff; 2379 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); 2380 return; 2381 } 2382 // le advertisement control 2383 if (hci_stack->le_advertisements_todo){ 2384 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2385 } 2386 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2387 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2388 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2389 return; 2390 } 2391 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2392 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2393 hci_send_cmd(&hci_le_set_advertising_parameters, 2394 hci_stack->le_advertisements_interval_min, 2395 hci_stack->le_advertisements_interval_max, 2396 hci_stack->le_advertisements_type, 2397 hci_stack->le_advertisements_own_address_type, 2398 hci_stack->le_advertisements_direct_address_type, 2399 hci_stack->le_advertisements_direct_address, 2400 hci_stack->le_advertisements_channel_map, 2401 hci_stack->le_advertisements_filter_policy); 2402 return; 2403 } 2404 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2405 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2406 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2407 hci_stack->le_advertisements_data); 2408 return; 2409 } 2410 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2411 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2412 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2413 hci_stack->le_scan_response_data); 2414 return; 2415 } 2416 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2417 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2418 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2419 return; 2420 } 2421 2422 // 2423 // LE Whitelist Management 2424 // 2425 2426 // check if whitelist needs modification 2427 btstack_linked_list_iterator_t lit; 2428 int modification_pending = 0; 2429 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2430 while (btstack_linked_list_iterator_has_next(&lit)){ 2431 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2432 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2433 modification_pending = 1; 2434 break; 2435 } 2436 } 2437 2438 if (modification_pending){ 2439 // stop connnecting if modification pending 2440 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2441 hci_send_cmd(&hci_le_create_connection_cancel); 2442 return; 2443 } 2444 2445 // add/remove entries 2446 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2447 while (btstack_linked_list_iterator_has_next(&lit)){ 2448 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2449 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2450 entry->state = LE_WHITELIST_ON_CONTROLLER; 2451 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2452 return; 2453 2454 } 2455 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2456 bd_addr_t address; 2457 bd_addr_type_t address_type = entry->address_type; 2458 memcpy(address, entry->address, 6); 2459 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2460 btstack_memory_whitelist_entry_free(entry); 2461 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2462 return; 2463 } 2464 } 2465 } 2466 2467 // start connecting 2468 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2469 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2470 bd_addr_t null_addr; 2471 memset(null_addr, 0, 6); 2472 hci_send_cmd(&hci_le_create_connection, 2473 0x0060, // scan interval: 60 ms 2474 0x0030, // scan interval: 30 ms 2475 1, // use whitelist 2476 0, // peer address type 2477 null_addr, // peer bd addr 2478 hci_stack->adv_addr_type, // our addr type: 2479 0x0008, // conn interval min 2480 0x0018, // conn interval max 2481 0, // conn latency 2482 0x0048, // supervision timeout 2483 0x0001, // min ce length 2484 0x0001 // max ce length 2485 ); 2486 return; 2487 } 2488 } 2489 #endif 2490 2491 // send pending HCI commands 2492 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2493 hci_connection_t * connection = (hci_connection_t *) it; 2494 2495 switch(connection->state){ 2496 case SEND_CREATE_CONNECTION: 2497 switch(connection->address_type){ 2498 case BD_ADDR_TYPE_CLASSIC: 2499 log_info("sending hci_create_connection"); 2500 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2501 break; 2502 default: 2503 #ifdef ENABLE_BLE 2504 log_info("sending hci_le_create_connection"); 2505 hci_send_cmd(&hci_le_create_connection, 2506 0x0060, // scan interval: 60 ms 2507 0x0030, // scan interval: 30 ms 2508 0, // don't use whitelist 2509 connection->address_type, // peer address type 2510 connection->address, // peer bd addr 2511 hci_stack->adv_addr_type, // our addr type: 2512 0x0008, // conn interval min 2513 0x0018, // conn interval max 2514 0, // conn latency 2515 0x0048, // supervision timeout 2516 0x0001, // min ce length 2517 0x0001 // max ce length 2518 ); 2519 2520 connection->state = SENT_CREATE_CONNECTION; 2521 #endif 2522 break; 2523 } 2524 return; 2525 2526 case RECEIVED_CONNECTION_REQUEST: 2527 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2528 connection->state = ACCEPTED_CONNECTION_REQUEST; 2529 connection->role = HCI_ROLE_SLAVE; 2530 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2531 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2532 } else { 2533 // remote supported feature eSCO is set if link type is eSCO 2534 uint16_t max_latency; 2535 uint8_t retransmission_effort; 2536 uint16_t packet_types; 2537 // remote supported feature eSCO is set if link type is eSCO 2538 if (connection->remote_supported_feature_eSCO){ 2539 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 2540 max_latency = 0x000c; 2541 retransmission_effort = 0x02; 2542 packet_types = 0x388; 2543 } else { 2544 // SCO: max latency, retransmission interval: N/A. any packet type 2545 max_latency = 0xffff; 2546 retransmission_effort = 0xff; 2547 packet_types = 0x003f; 2548 } 2549 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, max_latency, hci_stack->sco_voice_setting, retransmission_effort, packet_types); 2550 } 2551 return; 2552 2553 #ifdef ENABLE_BLE 2554 case SEND_CANCEL_CONNECTION: 2555 connection->state = SENT_CANCEL_CONNECTION; 2556 hci_send_cmd(&hci_le_create_connection_cancel); 2557 return; 2558 #endif 2559 case SEND_DISCONNECT: 2560 connection->state = SENT_DISCONNECT; 2561 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2562 return; 2563 2564 default: 2565 break; 2566 } 2567 2568 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2569 log_info("responding to link key request"); 2570 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2571 link_key_t link_key; 2572 link_key_type_t link_key_type; 2573 if ( hci_stack->link_key_db 2574 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2575 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2576 connection->link_key_type = link_key_type; 2577 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2578 } else { 2579 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2580 } 2581 return; 2582 } 2583 2584 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2585 log_info("denying to pin request"); 2586 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2587 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2588 return; 2589 } 2590 2591 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2592 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2593 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2594 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2595 // tweak authentication requirements 2596 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2597 if (connection->bonding_flags & BONDING_DEDICATED){ 2598 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2599 } 2600 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2601 authreq |= 1; 2602 } 2603 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2604 } else { 2605 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2606 } 2607 return; 2608 } 2609 2610 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2611 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2612 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2613 return; 2614 } 2615 2616 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2617 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2618 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2619 return; 2620 } 2621 2622 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2623 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2624 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2625 return; 2626 } 2627 2628 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2629 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2630 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2631 return; 2632 } 2633 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2634 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2635 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2636 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2637 return; 2638 } 2639 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2640 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2641 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2642 return; 2643 } 2644 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2645 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2646 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2647 return; 2648 } 2649 2650 #ifdef ENABLE_BLE 2651 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2652 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2653 2654 uint16_t connection_interval_min = connection->le_conn_interval_min; 2655 connection->le_conn_interval_min = 0; 2656 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2657 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2658 0x0000, 0xffff); 2659 } 2660 #endif 2661 } 2662 2663 hci_connection_t * connection; 2664 switch (hci_stack->state){ 2665 case HCI_STATE_INITIALIZING: 2666 hci_initializing_run(); 2667 break; 2668 2669 case HCI_STATE_HALTING: 2670 2671 log_info("HCI_STATE_HALTING"); 2672 2673 // free whitelist entries 2674 #ifdef ENABLE_BLE 2675 { 2676 btstack_linked_list_iterator_t lit; 2677 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2678 while (btstack_linked_list_iterator_has_next(&lit)){ 2679 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2680 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2681 btstack_memory_whitelist_entry_free(entry); 2682 } 2683 } 2684 #endif 2685 // close all open connections 2686 connection = (hci_connection_t *) hci_stack->connections; 2687 if (connection){ 2688 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2689 if (!hci_can_send_command_packet_now()) return; 2690 2691 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2692 2693 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2694 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2695 2696 // ... which would be ignored anyway as we shutdown (free) the connection now 2697 hci_shutdown_connection(connection); 2698 2699 // finally, send the disconnect command 2700 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2701 return; 2702 } 2703 log_info("HCI_STATE_HALTING, calling off"); 2704 2705 // switch mode 2706 hci_power_control_off(); 2707 2708 log_info("HCI_STATE_HALTING, emitting state"); 2709 hci_emit_state(); 2710 log_info("HCI_STATE_HALTING, done"); 2711 break; 2712 2713 case HCI_STATE_FALLING_ASLEEP: 2714 switch(hci_stack->substate) { 2715 case HCI_FALLING_ASLEEP_DISCONNECT: 2716 log_info("HCI_STATE_FALLING_ASLEEP"); 2717 // close all open connections 2718 connection = (hci_connection_t *) hci_stack->connections; 2719 2720 #ifdef HAVE_PLATFORM_IPHONE_OS 2721 // don't close connections, if H4 supports power management 2722 if (btstack_control_iphone_power_management_enabled()){ 2723 connection = NULL; 2724 } 2725 #endif 2726 if (connection){ 2727 2728 // send disconnect 2729 if (!hci_can_send_command_packet_now()) return; 2730 2731 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2732 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2733 2734 // send disconnected event right away - causes higher layer connections to get closed, too. 2735 hci_shutdown_connection(connection); 2736 return; 2737 } 2738 2739 if (hci_classic_supported()){ 2740 // disable page and inquiry scan 2741 if (!hci_can_send_command_packet_now()) return; 2742 2743 log_info("HCI_STATE_HALTING, disabling inq scans"); 2744 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2745 2746 // continue in next sub state 2747 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2748 break; 2749 } 2750 // fall through for ble-only chips 2751 2752 case HCI_FALLING_ASLEEP_COMPLETE: 2753 log_info("HCI_STATE_HALTING, calling sleep"); 2754 #ifdef HAVE_PLATFORM_IPHONE_OS 2755 // don't actually go to sleep, if H4 supports power management 2756 if (btstack_control_iphone_power_management_enabled()){ 2757 // SLEEP MODE reached 2758 hci_stack->state = HCI_STATE_SLEEPING; 2759 hci_emit_state(); 2760 break; 2761 } 2762 #endif 2763 // switch mode 2764 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2765 hci_emit_state(); 2766 break; 2767 2768 default: 2769 break; 2770 } 2771 break; 2772 2773 default: 2774 break; 2775 } 2776 } 2777 2778 int hci_send_cmd_packet(uint8_t *packet, int size){ 2779 bd_addr_t addr; 2780 hci_connection_t * conn; 2781 // house-keeping 2782 2783 // create_connection? 2784 if (IS_COMMAND(packet, hci_create_connection)){ 2785 reverse_bd_addr(&packet[3], addr); 2786 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2787 2788 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2789 if (!conn){ 2790 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2791 if (!conn){ 2792 // notify client that alloc failed 2793 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2794 return 0; // don't sent packet to controller 2795 } 2796 conn->state = SEND_CREATE_CONNECTION; 2797 } 2798 log_info("conn state %u", conn->state); 2799 switch (conn->state){ 2800 // if connection active exists 2801 case OPEN: 2802 // and OPEN, emit connection complete command, don't send to controller 2803 hci_emit_connection_complete(conn, 0); 2804 return 0; 2805 case SEND_CREATE_CONNECTION: 2806 // connection created by hci, e.g. dedicated bonding 2807 break; 2808 default: 2809 // otherwise, just ignore as it is already in the open process 2810 return 0; 2811 } 2812 conn->state = SENT_CREATE_CONNECTION; 2813 } 2814 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2815 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2816 } 2817 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2818 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2819 } 2820 2821 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2822 if (hci_stack->link_key_db){ 2823 reverse_bd_addr(&packet[3], addr); 2824 hci_stack->link_key_db->delete_link_key(addr); 2825 } 2826 } 2827 2828 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2829 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2830 reverse_bd_addr(&packet[3], addr); 2831 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2832 if (conn){ 2833 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2834 } 2835 } 2836 2837 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2838 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2839 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2840 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2841 reverse_bd_addr(&packet[3], addr); 2842 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2843 if (conn){ 2844 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2845 } 2846 } 2847 2848 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2849 hci_stack->loopback_mode = packet[3]; 2850 } 2851 2852 #ifdef ENABLE_BLE 2853 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2854 hci_stack->adv_addr_type = packet[8]; 2855 } 2856 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2857 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2858 } 2859 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2860 hci_stack->le_advertisements_active = packet[3]; 2861 } 2862 if (IS_COMMAND(packet, hci_le_create_connection)){ 2863 // white list used? 2864 uint8_t initiator_filter_policy = packet[7]; 2865 switch (initiator_filter_policy){ 2866 case 0: 2867 // whitelist not used 2868 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2869 break; 2870 case 1: 2871 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2872 break; 2873 default: 2874 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2875 break; 2876 } 2877 } 2878 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2879 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2880 } 2881 #endif 2882 2883 hci_stack->num_cmd_packets--; 2884 2885 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2886 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2887 2888 // release packet buffer for synchronous transport implementations 2889 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2890 hci_stack->hci_packet_buffer_reserved = 0; 2891 } 2892 2893 return err; 2894 } 2895 2896 // disconnect because of security block 2897 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2898 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2899 if (!connection) return; 2900 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2901 } 2902 2903 2904 // Configure Secure Simple Pairing 2905 2906 // enable will enable SSP during init 2907 void gap_ssp_set_enable(int enable){ 2908 hci_stack->ssp_enable = enable; 2909 } 2910 2911 static int hci_local_ssp_activated(void){ 2912 return gap_ssp_supported() && hci_stack->ssp_enable; 2913 } 2914 2915 // if set, BTstack will respond to io capability request using authentication requirement 2916 void gap_ssp_set_io_capability(int io_capability){ 2917 hci_stack->ssp_io_capability = io_capability; 2918 } 2919 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 2920 hci_stack->ssp_authentication_requirement = authentication_requirement; 2921 } 2922 2923 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2924 void gap_ssp_set_auto_accept(int auto_accept){ 2925 hci_stack->ssp_auto_accept = auto_accept; 2926 } 2927 2928 /** 2929 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2930 */ 2931 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2932 2933 if (!hci_can_send_command_packet_now()){ 2934 log_error("hci_send_cmd called but cannot send packet now"); 2935 return 0; 2936 } 2937 2938 // for HCI INITIALIZATION 2939 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2940 hci_stack->last_cmd_opcode = cmd->opcode; 2941 2942 hci_reserve_packet_buffer(); 2943 uint8_t * packet = hci_stack->hci_packet_buffer; 2944 2945 va_list argptr; 2946 va_start(argptr, cmd); 2947 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 2948 va_end(argptr); 2949 2950 return hci_send_cmd_packet(packet, size); 2951 } 2952 2953 // Create various non-HCI events. 2954 // TODO: generalize, use table similar to hci_create_command 2955 2956 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 2957 // dump packet 2958 if (dump) { 2959 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 2960 } 2961 2962 // dispatch to all event handlers 2963 btstack_linked_list_iterator_t it; 2964 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 2965 while (btstack_linked_list_iterator_has_next(&it)){ 2966 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 2967 entry->callback(HCI_EVENT_PACKET, 0, event, size); 2968 } 2969 } 2970 2971 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 2972 if (!hci_stack->acl_packet_handler) return; 2973 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, packet, size); 2974 } 2975 2976 static void hci_notify_if_sco_can_send_now(void){ 2977 // notify SCO sender if waiting 2978 if (!hci_stack->sco_waiting_for_can_send_now) return; 2979 if (hci_can_send_sco_packet_now()){ 2980 hci_stack->sco_waiting_for_can_send_now = 0; 2981 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 2982 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 2983 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2984 } 2985 } 2986 2987 void hci_emit_state(void){ 2988 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2989 uint8_t event[3]; 2990 event[0] = BTSTACK_EVENT_STATE; 2991 event[1] = sizeof(event) - 2; 2992 event[2] = hci_stack->state; 2993 hci_emit_event(event, sizeof(event), 1); 2994 } 2995 2996 static void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2997 uint8_t event[13]; 2998 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2999 event[1] = sizeof(event) - 2; 3000 event[2] = status; 3001 little_endian_store_16(event, 3, conn->con_handle); 3002 reverse_bd_addr(conn->address, &event[5]); 3003 event[11] = 1; // ACL connection 3004 event[12] = 0; // encryption disabled 3005 hci_emit_event(event, sizeof(event), 1); 3006 } 3007 3008 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3009 uint8_t event[21]; 3010 event[0] = HCI_EVENT_LE_META; 3011 event[1] = sizeof(event) - 2; 3012 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3013 event[3] = status; 3014 little_endian_store_16(event, 4, con_handle); 3015 event[6] = 0; // TODO: role 3016 event[7] = address_type; 3017 reverse_bd_addr(address, &event[8]); 3018 little_endian_store_16(event, 14, 0); // interval 3019 little_endian_store_16(event, 16, 0); // latency 3020 little_endian_store_16(event, 18, 0); // supervision timeout 3021 event[20] = 0; // master clock accuracy 3022 hci_emit_event(event, sizeof(event), 1); 3023 } 3024 3025 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3026 uint8_t event[6]; 3027 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3028 event[1] = sizeof(event) - 2; 3029 event[2] = 0; // status = OK 3030 little_endian_store_16(event, 3, con_handle); 3031 event[5] = reason; 3032 hci_emit_event(event, sizeof(event), 1); 3033 } 3034 3035 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3036 if (disable_l2cap_timeouts) return; 3037 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3038 uint8_t event[4]; 3039 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3040 event[1] = sizeof(event) - 2; 3041 little_endian_store_16(event, 2, conn->con_handle); 3042 hci_emit_event(event, sizeof(event), 1); 3043 } 3044 3045 static void hci_emit_nr_connections_changed(void){ 3046 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3047 uint8_t event[3]; 3048 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3049 event[1] = sizeof(event) - 2; 3050 event[2] = nr_hci_connections(); 3051 hci_emit_event(event, sizeof(event), 1); 3052 } 3053 3054 static void hci_emit_hci_open_failed(void){ 3055 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3056 uint8_t event[2]; 3057 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3058 event[1] = sizeof(event) - 2; 3059 hci_emit_event(event, sizeof(event), 1); 3060 } 3061 3062 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3063 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3064 uint8_t event[3]; 3065 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3066 event[1] = sizeof(event) - 2; 3067 event[2] = enabled; 3068 hci_emit_event(event, sizeof(event), 1); 3069 } 3070 3071 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3072 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3073 uint8_t event[5]; 3074 int pos = 0; 3075 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3076 event[pos++] = sizeof(event) - 2; 3077 little_endian_store_16(event, 2, con_handle); 3078 pos += 2; 3079 event[pos++] = level; 3080 hci_emit_event(event, sizeof(event), 1); 3081 } 3082 3083 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3084 log_info("hci_emit_dedicated_bonding_result %u ", status); 3085 uint8_t event[9]; 3086 int pos = 0; 3087 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3088 event[pos++] = sizeof(event) - 2; 3089 event[pos++] = status; 3090 reverse_bd_addr(address, &event[pos]); 3091 pos += 6; 3092 hci_emit_event(event, sizeof(event), 1); 3093 } 3094 3095 // query if remote side supports eSCO 3096 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3097 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3098 if (!connection) return 0; 3099 return connection->remote_supported_feature_eSCO; 3100 } 3101 3102 // query if remote side supports SSP 3103 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3104 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3105 if (!connection) return 0; 3106 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3107 } 3108 3109 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3110 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3111 } 3112 3113 // GAP API 3114 /** 3115 * @bbrief enable/disable bonding. default is enabled 3116 * @praram enabled 3117 */ 3118 void gap_set_bondable_mode(int enable){ 3119 hci_stack->bondable = enable ? 1 : 0; 3120 } 3121 /** 3122 * @brief Get bondable mode. 3123 * @return 1 if bondable 3124 */ 3125 int gap_get_bondable_mode(void){ 3126 return hci_stack->bondable; 3127 } 3128 3129 /** 3130 * @brief map link keys to security levels 3131 */ 3132 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3133 switch (link_key_type){ 3134 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3135 return LEVEL_4; 3136 case COMBINATION_KEY: 3137 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3138 return LEVEL_3; 3139 default: 3140 return LEVEL_2; 3141 } 3142 } 3143 3144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3145 if (!connection) return LEVEL_0; 3146 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3147 return gap_security_level_for_link_key_type(connection->link_key_type); 3148 } 3149 3150 3151 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3152 log_info("gap_mitm_protection_required_for_security_level %u", level); 3153 return level > LEVEL_2; 3154 } 3155 3156 /** 3157 * @brief get current security level 3158 */ 3159 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3160 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3161 if (!connection) return LEVEL_0; 3162 return gap_security_level_for_connection(connection); 3163 } 3164 3165 /** 3166 * @brief request connection to device to 3167 * @result GAP_AUTHENTICATION_RESULT 3168 */ 3169 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3170 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3171 if (!connection){ 3172 hci_emit_security_level(con_handle, LEVEL_0); 3173 return; 3174 } 3175 gap_security_level_t current_level = gap_security_level(con_handle); 3176 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3177 if (current_level >= requested_level){ 3178 hci_emit_security_level(con_handle, current_level); 3179 return; 3180 } 3181 3182 connection->requested_security_level = requested_level; 3183 3184 #if 0 3185 // sending encryption request without a link key results in an error. 3186 // TODO: figure out how to use it properly 3187 3188 // would enabling ecnryption suffice (>= LEVEL_2)? 3189 if (hci_stack->link_key_db){ 3190 link_key_type_t link_key_type; 3191 link_key_t link_key; 3192 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3193 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3194 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3195 return; 3196 } 3197 } 3198 } 3199 #endif 3200 3201 // try to authenticate connection 3202 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3203 hci_run(); 3204 } 3205 3206 /** 3207 * @brief start dedicated bonding with device. disconnect after bonding 3208 * @param device 3209 * @param request MITM protection 3210 * @result GAP_DEDICATED_BONDING_COMPLETE 3211 */ 3212 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3213 3214 // create connection state machine 3215 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3216 3217 if (!connection){ 3218 return BTSTACK_MEMORY_ALLOC_FAILED; 3219 } 3220 3221 // delete linkn key 3222 gap_drop_link_key_for_bd_addr(device); 3223 3224 // configure LEVEL_2/3, dedicated bonding 3225 connection->state = SEND_CREATE_CONNECTION; 3226 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3227 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3228 connection->bonding_flags = BONDING_DEDICATED; 3229 3230 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3231 3232 // handle: connnection failure (connection complete != ok) 3233 // handle: authentication failure 3234 // handle: disconnect on done 3235 3236 hci_run(); 3237 3238 return 0; 3239 } 3240 3241 void gap_set_local_name(const char * local_name){ 3242 hci_stack->local_name = local_name; 3243 } 3244 3245 void gap_start_scan(void){ 3246 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3247 hci_stack->le_scanning_state = LE_START_SCAN; 3248 hci_run(); 3249 } 3250 3251 void gap_stop_scan(void){ 3252 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3253 hci_stack->le_scanning_state = LE_STOP_SCAN; 3254 hci_run(); 3255 } 3256 3257 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3258 hci_stack->le_scan_type = scan_type; 3259 hci_stack->le_scan_interval = scan_interval; 3260 hci_stack->le_scan_window = scan_window; 3261 hci_run(); 3262 } 3263 3264 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3265 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3266 if (!conn){ 3267 log_info("gap_connect: no connection exists yet, creating context"); 3268 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3269 if (!conn){ 3270 // notify client that alloc failed 3271 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3272 log_info("gap_connect: failed to alloc hci_connection_t"); 3273 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3274 } 3275 conn->state = SEND_CREATE_CONNECTION; 3276 log_info("gap_connect: send create connection next"); 3277 hci_run(); 3278 return 0; 3279 } 3280 3281 if (!hci_is_le_connection(conn) || 3282 conn->state == SEND_CREATE_CONNECTION || 3283 conn->state == SENT_CREATE_CONNECTION) { 3284 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3285 log_error("gap_connect: classic connection or connect is already being created"); 3286 return GATT_CLIENT_IN_WRONG_STATE; 3287 } 3288 3289 log_info("gap_connect: context exists with state %u", conn->state); 3290 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3291 hci_run(); 3292 return 0; 3293 } 3294 3295 // @assumption: only a single outgoing LE Connection exists 3296 static hci_connection_t * gap_get_outgoing_connection(void){ 3297 btstack_linked_item_t *it; 3298 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3299 hci_connection_t * conn = (hci_connection_t *) it; 3300 if (!hci_is_le_connection(conn)) continue; 3301 switch (conn->state){ 3302 case SEND_CREATE_CONNECTION: 3303 case SENT_CREATE_CONNECTION: 3304 return conn; 3305 default: 3306 break; 3307 }; 3308 } 3309 return NULL; 3310 } 3311 3312 uint8_t gap_connect_cancel(void){ 3313 hci_connection_t * conn = gap_get_outgoing_connection(); 3314 if (!conn) return 0; 3315 switch (conn->state){ 3316 case SEND_CREATE_CONNECTION: 3317 // skip sending create connection and emit event instead 3318 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3319 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3320 btstack_memory_hci_connection_free( conn ); 3321 break; 3322 case SENT_CREATE_CONNECTION: 3323 // request to send cancel connection 3324 conn->state = SEND_CANCEL_CONNECTION; 3325 hci_run(); 3326 break; 3327 default: 3328 break; 3329 } 3330 return 0; 3331 } 3332 3333 /** 3334 * @brief Updates the connection parameters for a given LE connection 3335 * @param handle 3336 * @param conn_interval_min (unit: 1.25ms) 3337 * @param conn_interval_max (unit: 1.25ms) 3338 * @param conn_latency 3339 * @param supervision_timeout (unit: 10ms) 3340 * @returns 0 if ok 3341 */ 3342 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3343 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3345 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3346 connection->le_conn_interval_min = conn_interval_min; 3347 connection->le_conn_interval_max = conn_interval_max; 3348 connection->le_conn_latency = conn_latency; 3349 connection->le_supervision_timeout = supervision_timeout; 3350 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3351 hci_run(); 3352 return 0; 3353 } 3354 3355 /** 3356 * @brief Request an update of the connection parameter for a given LE connection 3357 * @param handle 3358 * @param conn_interval_min (unit: 1.25ms) 3359 * @param conn_interval_max (unit: 1.25ms) 3360 * @param conn_latency 3361 * @param supervision_timeout (unit: 10ms) 3362 * @returns 0 if ok 3363 */ 3364 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3365 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3366 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3367 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3368 connection->le_conn_interval_min = conn_interval_min; 3369 connection->le_conn_interval_max = conn_interval_max; 3370 connection->le_conn_latency = conn_latency; 3371 connection->le_supervision_timeout = supervision_timeout; 3372 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3373 hci_run(); 3374 return 0; 3375 } 3376 3377 static void gap_advertisments_changed(void){ 3378 // disable advertisements before updating adv, scan data, or adv params 3379 if (hci_stack->le_advertisements_active){ 3380 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3381 } 3382 hci_run(); 3383 } 3384 3385 /** 3386 * @brief Set Advertisement Data 3387 * @param advertising_data_length 3388 * @param advertising_data (max 31 octets) 3389 * @note data is not copied, pointer has to stay valid 3390 */ 3391 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3392 hci_stack->le_advertisements_data_len = advertising_data_length; 3393 hci_stack->le_advertisements_data = advertising_data; 3394 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3395 gap_advertisments_changed(); 3396 } 3397 3398 /** 3399 * @brief Set Scan Response Data 3400 * @param advertising_data_length 3401 * @param advertising_data (max 31 octets) 3402 * @note data is not copied, pointer has to stay valid 3403 */ 3404 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3405 hci_stack->le_scan_response_data_len = scan_response_data_length; 3406 hci_stack->le_scan_response_data = scan_response_data; 3407 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3408 gap_advertisments_changed(); 3409 } 3410 3411 /** 3412 * @brief Set Advertisement Parameters 3413 * @param adv_int_min 3414 * @param adv_int_max 3415 * @param adv_type 3416 * @param own_address_type 3417 * @param direct_address_type 3418 * @param direct_address 3419 * @param channel_map 3420 * @param filter_policy 3421 * 3422 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3423 */ 3424 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3425 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3426 uint8_t channel_map, uint8_t filter_policy) { 3427 3428 hci_stack->le_advertisements_interval_min = adv_int_min; 3429 hci_stack->le_advertisements_interval_max = adv_int_max; 3430 hci_stack->le_advertisements_type = adv_type; 3431 hci_stack->le_advertisements_own_address_type = own_address_type; 3432 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3433 hci_stack->le_advertisements_channel_map = channel_map; 3434 hci_stack->le_advertisements_filter_policy = filter_policy; 3435 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3436 3437 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3438 gap_advertisments_changed(); 3439 } 3440 3441 /** 3442 * @brief Enable/Disable Advertisements 3443 * @param enabled 3444 */ 3445 void gap_advertisements_enable(int enabled){ 3446 hci_stack->le_advertisements_enabled = enabled; 3447 if (enabled && !hci_stack->le_advertisements_active){ 3448 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3449 } 3450 if (!enabled && hci_stack->le_advertisements_active){ 3451 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3452 } 3453 hci_run(); 3454 } 3455 3456 3457 uint8_t gap_disconnect(hci_con_handle_t handle){ 3458 hci_connection_t * conn = hci_connection_for_handle(handle); 3459 if (!conn){ 3460 hci_emit_disconnection_complete(handle, 0); 3461 return 0; 3462 } 3463 conn->state = SEND_DISCONNECT; 3464 hci_run(); 3465 return 0; 3466 } 3467 3468 /** 3469 * @brief Get connection type 3470 * @param con_handle 3471 * @result connection_type 3472 */ 3473 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3474 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3475 if (!conn) return GAP_CONNECTION_INVALID; 3476 switch (conn->address_type){ 3477 case BD_ADDR_TYPE_LE_PUBLIC: 3478 case BD_ADDR_TYPE_LE_RANDOM: 3479 return GAP_CONNECTION_LE; 3480 case BD_ADDR_TYPE_SCO: 3481 return GAP_CONNECTION_SCO; 3482 case BD_ADDR_TYPE_CLASSIC: 3483 return GAP_CONNECTION_ACL; 3484 default: 3485 return GAP_CONNECTION_INVALID; 3486 } 3487 } 3488 3489 #ifdef ENABLE_BLE 3490 3491 /** 3492 * @brief Auto Connection Establishment - Start Connecting to device 3493 * @param address_typ 3494 * @param address 3495 * @returns 0 if ok 3496 */ 3497 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3498 // check capacity 3499 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3500 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3501 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3502 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3503 entry->address_type = address_type; 3504 memcpy(entry->address, address, 6); 3505 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3506 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3507 hci_run(); 3508 return 0; 3509 } 3510 3511 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3512 btstack_linked_list_iterator_t it; 3513 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3514 while (btstack_linked_list_iterator_has_next(&it)){ 3515 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3516 if (entry->address_type != address_type) continue; 3517 if (memcmp(entry->address, address, 6) != 0) continue; 3518 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3519 // remove from controller if already present 3520 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3521 continue; 3522 } 3523 // direclty remove entry from whitelist 3524 btstack_linked_list_iterator_remove(&it); 3525 btstack_memory_whitelist_entry_free(entry); 3526 } 3527 } 3528 3529 /** 3530 * @brief Auto Connection Establishment - Stop Connecting to device 3531 * @param address_typ 3532 * @param address 3533 * @returns 0 if ok 3534 */ 3535 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3536 hci_remove_from_whitelist(address_type, address); 3537 hci_run(); 3538 return 0; 3539 } 3540 3541 /** 3542 * @brief Auto Connection Establishment - Stop everything 3543 * @note Convenience function to stop all active auto connection attempts 3544 */ 3545 void gap_auto_connection_stop_all(void){ 3546 btstack_linked_list_iterator_t it; 3547 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3548 while (btstack_linked_list_iterator_has_next(&it)){ 3549 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3550 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3551 // remove from controller if already present 3552 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3553 continue; 3554 } 3555 // directly remove entry from whitelist 3556 btstack_linked_list_iterator_remove(&it); 3557 btstack_memory_whitelist_entry_free(entry); 3558 } 3559 hci_run(); 3560 } 3561 3562 #endif 3563 3564 /** 3565 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3566 */ 3567 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3568 hci_stack->sco_voice_setting = voice_setting; 3569 } 3570 3571 /** 3572 * @brief Get SCO Voice Setting 3573 * @return current voice setting 3574 */ 3575 uint16_t hci_get_sco_voice_setting(void){ 3576 return hci_stack->sco_voice_setting; 3577 } 3578 3579 /** @brief Get SCO packet length for current SCO Voice setting 3580 * @note Using SCO packets of the exact length is required for USB transfer 3581 * @return Length of SCO packets in bytes (not audio frames) 3582 */ 3583 int hci_get_sco_packet_length(void){ 3584 // see Core Spec for H2 USB Transfer. 3585 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3586 return 27; 3587 } 3588 3589 /** 3590 * @brief Set callback for Bluetooth Hardware Error 3591 */ 3592 void hci_set_hardware_error_callback(void (*fn)(void)){ 3593 hci_stack->hardware_error_callback = fn; 3594 } 3595 3596 /** 3597 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3598 * @note Can be used to select chipset driver dynamically during startup 3599 */ 3600 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3601 hci_stack->local_version_information_callback = fn; 3602 } 3603 3604 void hci_disconnect_all(void){ 3605 btstack_linked_list_iterator_t it; 3606 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3607 while (btstack_linked_list_iterator_has_next(&it)){ 3608 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3609 if (con->state == SENT_DISCONNECT) continue; 3610 con->state = SEND_DISCONNECT; 3611 } 3612 hci_run(); 3613 } 3614