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 #define HCI_RESET_RESEND_TIMEOUT_MS 200 77 78 // prototypes 79 static void hci_update_scan_enable(void); 80 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 81 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 82 static void hci_connection_timestamp(hci_connection_t *connection); 83 static int hci_power_control_on(void); 84 static void hci_power_control_off(void); 85 static void hci_state_reset(void); 86 static void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status); 87 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 88 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 89 static void hci_emit_nr_connections_changed(void); 90 static void hci_emit_hci_open_failed(void); 91 static void hci_emit_discoverable_enabled(uint8_t enabled); 92 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 93 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 94 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 95 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 96 static void hci_notify_if_sco_can_send_now(void); 97 static void hci_run(void); 98 static int hci_is_le_connection(hci_connection_t * connection); 99 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 100 static int hci_local_ssp_activated(void); 101 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 102 103 #ifdef ENABLE_BLE 104 // called from test/ble_client/advertising_data_parser.c 105 void le_handle_advertisement_report(uint8_t *packet, int size); 106 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 107 #endif 108 109 // the STACK is here 110 #ifndef HAVE_MALLOC 111 static hci_stack_t hci_stack_static; 112 #endif 113 static hci_stack_t * hci_stack = NULL; 114 115 // test helper 116 static uint8_t disable_l2cap_timeouts = 0; 117 118 /** 119 * create connection for given address 120 * 121 * @return connection OR NULL, if no memory left 122 */ 123 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 124 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 125 hci_connection_t * conn = btstack_memory_hci_connection_get(); 126 if (!conn) return NULL; 127 memset(conn, 0, sizeof(hci_connection_t)); 128 bd_addr_copy(conn->address, addr); 129 conn->address_type = addr_type; 130 conn->con_handle = 0xffff; 131 conn->authentication_flags = AUTH_FLAGS_NONE; 132 conn->bonding_flags = 0; 133 conn->requested_security_level = LEVEL_0; 134 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 135 btstack_run_loop_set_timer_context(&conn->timeout, conn); 136 hci_connection_timestamp(conn); 137 conn->acl_recombination_length = 0; 138 conn->acl_recombination_pos = 0; 139 conn->num_acl_packets_sent = 0; 140 conn->num_sco_packets_sent = 0; 141 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 142 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 143 return conn; 144 } 145 146 147 /** 148 * get le connection parameter range 149 * 150 * @return le connection parameter range struct 151 */ 152 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 153 *range = hci_stack->le_connection_parameter_range; 154 } 155 156 /** 157 * set le connection parameter range 158 * 159 */ 160 161 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 162 hci_stack->le_connection_parameter_range = *range; 163 } 164 165 /** 166 * get hci connections iterator 167 * 168 * @return hci connections iterator 169 */ 170 171 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 172 btstack_linked_list_iterator_init(it, &hci_stack->connections); 173 } 174 175 /** 176 * get connection for a given handle 177 * 178 * @return connection OR NULL, if not found 179 */ 180 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 181 btstack_linked_list_iterator_t it; 182 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 183 while (btstack_linked_list_iterator_has_next(&it)){ 184 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 185 if ( item->con_handle == con_handle ) { 186 return item; 187 } 188 } 189 return NULL; 190 } 191 192 /** 193 * get connection for given address 194 * 195 * @return connection OR NULL, if not found 196 */ 197 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 198 btstack_linked_list_iterator_t it; 199 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 200 while (btstack_linked_list_iterator_has_next(&it)){ 201 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 202 if (connection->address_type != addr_type) continue; 203 if (memcmp(addr, connection->address, 6) != 0) continue; 204 return connection; 205 } 206 return NULL; 207 } 208 209 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 210 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 211 #ifdef HAVE_EMBEDDED_TICK 212 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 213 // connections might be timed out 214 hci_emit_l2cap_check_timeout(connection); 215 } 216 #else 217 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 218 // connections might be timed out 219 hci_emit_l2cap_check_timeout(connection); 220 } 221 #endif 222 } 223 224 static void hci_connection_timestamp(hci_connection_t *connection){ 225 #ifdef HAVE_EMBEDDED_TICK 226 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 227 #else 228 connection->timestamp = btstack_run_loop_get_time_ms(); 229 #endif 230 } 231 232 233 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 234 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 235 } 236 237 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 238 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 239 } 240 241 242 /** 243 * add authentication flags and reset timer 244 * @note: assumes classic connection 245 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 246 */ 247 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 248 bd_addr_t addr; 249 reverse_bd_addr(bd_addr, addr); 250 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 251 if (conn) { 252 connectionSetAuthenticationFlags(conn, flags); 253 hci_connection_timestamp(conn); 254 } 255 } 256 257 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 258 hci_connection_t * conn = hci_connection_for_handle(handle); 259 if (!conn) return 0; 260 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 261 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 262 return 0; 263 } 264 265 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 266 if (hci_stack->link_key_db) { 267 hci_stack->link_key_db->delete_link_key(addr); 268 } 269 } 270 271 static int hci_is_le_connection(hci_connection_t * connection){ 272 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 273 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 274 } 275 276 277 /** 278 * count connections 279 */ 280 static int nr_hci_connections(void){ 281 int count = 0; 282 btstack_linked_item_t *it; 283 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 284 return count; 285 } 286 287 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 288 289 int num_packets_sent_classic = 0; 290 int num_packets_sent_le = 0; 291 292 btstack_linked_item_t *it; 293 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 294 hci_connection_t * connection = (hci_connection_t *) it; 295 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 296 num_packets_sent_classic += connection->num_acl_packets_sent; 297 } else { 298 num_packets_sent_le += connection->num_acl_packets_sent; 299 } 300 } 301 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 302 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 303 int free_slots_le = 0; 304 305 if (free_slots_classic < 0){ 306 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); 307 return 0; 308 } 309 310 if (hci_stack->le_acl_packets_total_num){ 311 // if we have LE slots, they are used 312 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 313 if (free_slots_le < 0){ 314 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); 315 return 0; 316 } 317 } else { 318 // otherwise, classic slots are used for LE, too 319 free_slots_classic -= num_packets_sent_le; 320 if (free_slots_classic < 0){ 321 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); 322 return 0; 323 } 324 } 325 326 switch (address_type){ 327 case BD_ADDR_TYPE_UNKNOWN: 328 log_error("hci_number_free_acl_slots: unknown address type"); 329 return 0; 330 331 case BD_ADDR_TYPE_CLASSIC: 332 return free_slots_classic; 333 334 default: 335 if (hci_stack->le_acl_packets_total_num){ 336 return free_slots_le; 337 } 338 return free_slots_classic; 339 } 340 } 341 342 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 343 // get connection type 344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 345 if (!connection){ 346 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 347 return 0; 348 } 349 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 350 } 351 352 static int hci_number_free_sco_slots(void){ 353 int num_sco_packets_sent = 0; 354 btstack_linked_item_t *it; 355 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 356 hci_connection_t * connection = (hci_connection_t *) it; 357 num_sco_packets_sent += connection->num_sco_packets_sent; 358 } 359 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 360 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 361 return 0; 362 } 363 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 364 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 365 } 366 367 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 368 int hci_can_send_command_packet_now(void){ 369 if (hci_stack->hci_packet_buffer_reserved) return 0; 370 371 // check for async hci transport implementations 372 if (hci_stack->hci_transport->can_send_packet_now){ 373 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 374 return 0; 375 } 376 } 377 378 return hci_stack->num_cmd_packets > 0; 379 } 380 381 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 382 // check for async hci transport implementations 383 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 384 return hci_stack->hci_transport->can_send_packet_now(packet_type); 385 } 386 387 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 388 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 389 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 390 } 391 392 int hci_can_send_acl_classic_packet_now(void){ 393 if (hci_stack->hci_packet_buffer_reserved) return 0; 394 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 395 } 396 397 int hci_can_send_acl_le_packet_now(void){ 398 if (hci_stack->hci_packet_buffer_reserved) return 0; 399 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 400 } 401 402 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 403 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 404 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 405 } 406 407 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 408 if (hci_stack->hci_packet_buffer_reserved) return 0; 409 return hci_can_send_prepared_acl_packet_now(con_handle); 410 } 411 412 int hci_can_send_prepared_sco_packet_now(void){ 413 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 414 if (!hci_stack->synchronous_flow_control_enabled) return 1; 415 return hci_number_free_sco_slots() > 0; 416 } 417 418 int hci_can_send_sco_packet_now(void){ 419 if (hci_stack->hci_packet_buffer_reserved) return 0; 420 return hci_can_send_prepared_sco_packet_now(); 421 } 422 423 void hci_request_sco_can_send_now_event(void){ 424 hci_stack->sco_waiting_for_can_send_now = 1; 425 hci_notify_if_sco_can_send_now(); 426 } 427 428 // used for internal checks in l2cap.c 429 int hci_is_packet_buffer_reserved(void){ 430 return hci_stack->hci_packet_buffer_reserved; 431 } 432 433 // reserves outgoing packet buffer. @returns 1 if successful 434 int hci_reserve_packet_buffer(void){ 435 if (hci_stack->hci_packet_buffer_reserved) { 436 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 437 return 0; 438 } 439 hci_stack->hci_packet_buffer_reserved = 1; 440 return 1; 441 } 442 443 void hci_release_packet_buffer(void){ 444 hci_stack->hci_packet_buffer_reserved = 0; 445 } 446 447 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 448 static int hci_transport_synchronous(void){ 449 return hci_stack->hci_transport->can_send_packet_now == NULL; 450 } 451 452 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 453 454 // 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); 455 456 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 457 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 458 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 459 max_acl_data_packet_length = hci_stack->le_data_packets_length; 460 } 461 462 // testing: reduce buffer to minimum 463 // max_acl_data_packet_length = 52; 464 465 log_debug("hci_send_acl_packet_fragments entered"); 466 467 int err; 468 // multiple packets could be send on a synchronous HCI transport 469 while (1){ 470 471 log_debug("hci_send_acl_packet_fragments loop entered"); 472 473 // get current data 474 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 475 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 476 int more_fragments = 0; 477 478 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 479 if (current_acl_data_packet_length > max_acl_data_packet_length){ 480 more_fragments = 1; 481 current_acl_data_packet_length = max_acl_data_packet_length; 482 } 483 484 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 485 if (acl_header_pos > 0){ 486 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 487 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 488 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 489 } 490 491 // update header len 492 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 493 494 // count packet 495 connection->num_acl_packets_sent++; 496 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %u)", more_fragments); 497 498 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 499 if (more_fragments){ 500 // update start of next fragment to send 501 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 502 } else { 503 // done 504 hci_stack->acl_fragmentation_pos = 0; 505 hci_stack->acl_fragmentation_total_size = 0; 506 } 507 508 // send packet 509 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 510 const int size = current_acl_data_packet_length + 4; 511 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 512 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 513 514 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %u)", more_fragments); 515 516 // done yet? 517 if (!more_fragments) break; 518 519 // can send more? 520 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 521 } 522 523 log_debug("hci_send_acl_packet_fragments loop over"); 524 525 // release buffer now for synchronous transport 526 if (hci_transport_synchronous()){ 527 hci_release_packet_buffer(); 528 // notify upper stack that it might be possible to send again 529 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 530 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 531 } 532 533 return err; 534 } 535 536 // pre: caller has reserved the packet buffer 537 int hci_send_acl_packet_buffer(int size){ 538 539 // log_info("hci_send_acl_packet_buffer size %u", size); 540 541 if (!hci_stack->hci_packet_buffer_reserved) { 542 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 543 return 0; 544 } 545 546 uint8_t * packet = hci_stack->hci_packet_buffer; 547 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 548 549 // check for free places on Bluetooth module 550 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 551 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 552 hci_release_packet_buffer(); 553 return BTSTACK_ACL_BUFFERS_FULL; 554 } 555 556 hci_connection_t *connection = hci_connection_for_handle( con_handle); 557 if (!connection) { 558 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 559 hci_release_packet_buffer(); 560 return 0; 561 } 562 hci_connection_timestamp(connection); 563 564 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 565 566 // setup data 567 hci_stack->acl_fragmentation_total_size = size; 568 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 569 570 return hci_send_acl_packet_fragments(connection); 571 } 572 573 // pre: caller has reserved the packet buffer 574 int hci_send_sco_packet_buffer(int size){ 575 576 // log_info("hci_send_acl_packet_buffer size %u", size); 577 578 if (!hci_stack->hci_packet_buffer_reserved) { 579 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 580 return 0; 581 } 582 583 uint8_t * packet = hci_stack->hci_packet_buffer; 584 585 // skip checks in loopback mode 586 if (!hci_stack->loopback_mode){ 587 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 588 589 // check for free places on Bluetooth module 590 if (!hci_can_send_prepared_sco_packet_now()) { 591 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 592 hci_release_packet_buffer(); 593 return BTSTACK_ACL_BUFFERS_FULL; 594 } 595 596 // track send packet in connection struct 597 hci_connection_t *connection = hci_connection_for_handle( con_handle); 598 if (!connection) { 599 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 600 hci_release_packet_buffer(); 601 return 0; 602 } 603 connection->num_sco_packets_sent++; 604 } 605 606 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 607 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 608 609 if (hci_transport_synchronous()){ 610 hci_release_packet_buffer(); 611 // notify upper stack that it might be possible to send again 612 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 613 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 614 } 615 616 return err; 617 } 618 619 static void acl_handler(uint8_t *packet, int size){ 620 621 // log_info("acl_handler: size %u", size); 622 623 // get info 624 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 625 hci_connection_t *conn = hci_connection_for_handle(con_handle); 626 uint8_t acl_flags = READ_ACL_FLAGS(packet); 627 uint16_t acl_length = READ_ACL_LENGTH(packet); 628 629 // ignore non-registered handle 630 if (!conn){ 631 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 632 return; 633 } 634 635 // assert packet is complete 636 if (acl_length + 4 != size){ 637 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 638 return; 639 } 640 641 // update idle timestamp 642 hci_connection_timestamp(conn); 643 644 // handle different packet types 645 switch (acl_flags & 0x03) { 646 647 case 0x01: // continuation fragment 648 649 // sanity checks 650 if (conn->acl_recombination_pos == 0) { 651 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 652 return; 653 } 654 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 655 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 656 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 657 conn->acl_recombination_pos = 0; 658 return; 659 } 660 661 // append fragment payload (header already stored) 662 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 663 conn->acl_recombination_pos += acl_length; 664 665 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 666 // conn->acl_recombination_pos, conn->acl_recombination_length); 667 668 // forward complete L2CAP packet if complete. 669 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 670 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 671 // reset recombination buffer 672 conn->acl_recombination_length = 0; 673 conn->acl_recombination_pos = 0; 674 } 675 break; 676 677 case 0x02: { // first fragment 678 679 // sanity check 680 if (conn->acl_recombination_pos) { 681 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 682 conn->acl_recombination_pos = 0; 683 } 684 685 // peek into L2CAP packet! 686 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 687 688 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 689 690 // compare fragment size to L2CAP packet size 691 if (acl_length >= l2cap_length + 4){ 692 // forward fragment as L2CAP packet 693 hci_emit_acl_packet(packet, acl_length + 4); 694 } else { 695 696 if (acl_length > HCI_ACL_BUFFER_SIZE){ 697 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 698 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 699 return; 700 } 701 702 // store first fragment and tweak acl length for complete package 703 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 704 conn->acl_recombination_pos = acl_length + 4; 705 conn->acl_recombination_length = l2cap_length; 706 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 707 } 708 break; 709 710 } 711 default: 712 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 713 return; 714 } 715 716 // execute main loop 717 hci_run(); 718 } 719 720 static void hci_shutdown_connection(hci_connection_t *conn){ 721 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 722 723 btstack_run_loop_remove_timer(&conn->timeout); 724 725 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 726 btstack_memory_hci_connection_free( conn ); 727 728 // now it's gone 729 hci_emit_nr_connections_changed(); 730 } 731 732 static const uint16_t packet_type_sizes[] = { 733 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 734 HCI_ACL_DH1_SIZE, 0, 0, 0, 735 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 736 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 737 }; 738 static const uint8_t packet_type_feature_requirement_bit[] = { 739 0, // 3 slot packets 740 1, // 5 slot packets 741 25, // EDR 2 mpbs 742 26, // EDR 3 mbps 743 39, // 3 slot EDR packts 744 40, // 5 slot EDR packet 745 }; 746 static const uint16_t packet_type_feature_packet_mask[] = { 747 0x0f00, // 3 slot packets 748 0xf000, // 5 slot packets 749 0x1102, // EDR 2 mpbs 750 0x2204, // EDR 3 mbps 751 0x0300, // 3 slot EDR packts 752 0x3000, // 5 slot EDR packet 753 }; 754 755 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 756 // enable packet types based on size 757 uint16_t packet_types = 0; 758 unsigned int i; 759 for (i=0;i<16;i++){ 760 if (packet_type_sizes[i] == 0) continue; 761 if (packet_type_sizes[i] <= buffer_size){ 762 packet_types |= 1 << i; 763 } 764 } 765 // disable packet types due to missing local supported features 766 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 767 int bit_idx = packet_type_feature_requirement_bit[i]; 768 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 769 if (feature_set) continue; 770 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 771 packet_types &= ~packet_type_feature_packet_mask[i]; 772 } 773 // flip bits for "may not be used" 774 packet_types ^= 0x3306; 775 return packet_types; 776 } 777 778 uint16_t hci_usable_acl_packet_types(void){ 779 return hci_stack->packet_types; 780 } 781 782 uint8_t* hci_get_outgoing_packet_buffer(void){ 783 // hci packet buffer is >= acl data packet length 784 return hci_stack->hci_packet_buffer; 785 } 786 787 uint16_t hci_max_acl_data_packet_length(void){ 788 return hci_stack->acl_data_packet_length; 789 } 790 791 int hci_extended_sco_link_supported(void){ 792 // No. 31, byte 3, bit 7 793 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 794 } 795 796 int hci_non_flushable_packet_boundary_flag_supported(void){ 797 // No. 54, byte 6, bit 6 798 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 799 } 800 801 static int gap_ssp_supported(void){ 802 // No. 51, byte 6, bit 3 803 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 804 } 805 806 static int hci_classic_supported(void){ 807 // No. 37, byte 4, bit 5, = No BR/EDR Support 808 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 809 } 810 811 static int hci_le_supported(void){ 812 #ifdef ENABLE_BLE 813 // No. 37, byte 4, bit 6 = LE Supported (Controller) 814 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 815 #else 816 return 0; 817 #endif 818 } 819 820 // get addr type and address used in advertisement packets 821 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 822 *addr_type = hci_stack->adv_addr_type; 823 if (hci_stack->adv_addr_type){ 824 memcpy(addr, hci_stack->adv_address, 6); 825 } else { 826 memcpy(addr, hci_stack->local_bd_addr, 6); 827 } 828 } 829 830 #ifdef ENABLE_BLE 831 void le_handle_advertisement_report(uint8_t *packet, int size){ 832 int offset = 3; 833 int num_reports = packet[offset]; 834 offset += 1; 835 836 int i; 837 // log_info("HCI: handle adv report with num reports: %d", num_reports); 838 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 839 for (i=0; i<num_reports;i++){ 840 uint8_t data_length = packet[offset + 8]; 841 uint8_t event_size = 10 + data_length; 842 int pos = 0; 843 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 844 event[pos++] = event_size; 845 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 846 offset += 8; 847 pos += 8; 848 event[pos++] = packet[offset + 1 + data_length]; // rssi 849 event[pos++] = packet[offset++]; //data_length; 850 memcpy(&event[pos], &packet[offset], data_length); 851 pos += data_length; 852 offset += data_length + 1; // rssi 853 hci_emit_event(event, pos, 1); 854 } 855 } 856 #endif 857 858 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 859 if (!hci_stack->config) return 0; 860 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 861 // Limit baud rate for Broadcom chipsets to 3 mbps 862 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 863 baud_rate = 3000000; 864 } 865 return baud_rate; 866 } 867 868 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 869 switch (hci_stack->substate){ 870 case HCI_INIT_W4_SEND_RESET: 871 log_info("Resend HCI Reset"); 872 hci_stack->substate = HCI_INIT_SEND_RESET; 873 hci_stack->num_cmd_packets = 1; 874 hci_run(); 875 break; 876 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 877 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 878 if (hci_stack->hci_transport->reset_link){ 879 hci_stack->hci_transport->reset_link(); 880 } 881 // NOTE: explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 882 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 883 log_info("Resend HCI Reset - CSR Warm Boot"); 884 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 885 hci_stack->num_cmd_packets = 1; 886 hci_run(); 887 break; 888 case HCI_INIT_W4_SEND_BAUD_CHANGE: { 889 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 890 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 891 hci_stack->hci_transport->set_baudrate(baud_rate); 892 // For CSR, HCI Reset is sent on new baud rate 893 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 894 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 895 hci_run(); 896 } 897 break; 898 } 899 default: 900 break; 901 } 902 } 903 904 static void hci_initializing_next_state(void){ 905 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 906 } 907 908 // assumption: hci_can_send_command_packet_now() == true 909 static void hci_initializing_run(void){ 910 log_info("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 911 switch (hci_stack->substate){ 912 case HCI_INIT_SEND_RESET: 913 hci_state_reset(); 914 915 #ifndef HAVE_PLATFORM_IPHONE_OS 916 // prepare reset if command complete not received in 100ms 917 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 918 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 919 btstack_run_loop_add_timer(&hci_stack->timeout); 920 #endif 921 // send command 922 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 923 hci_send_cmd(&hci_reset); 924 break; 925 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 926 hci_send_cmd(&hci_read_local_version_information); 927 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 928 break; 929 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 930 hci_state_reset(); 931 // prepare reset if command complete not received in 100ms 932 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 933 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 934 btstack_run_loop_add_timer(&hci_stack->timeout); 935 // send command 936 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 937 hci_send_cmd(&hci_reset); 938 break; 939 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 940 hci_state_reset(); 941 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 942 hci_send_cmd(&hci_reset); 943 break; 944 case HCI_INIT_SEND_BAUD_CHANGE: { 945 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 946 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 947 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 948 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 949 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 950 // STLC25000D: baudrate change happens within 0.5 s after command was send, 951 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 952 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 953 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 954 btstack_run_loop_add_timer(&hci_stack->timeout); 955 } 956 break; 957 } 958 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 959 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 960 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 961 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 962 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 963 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 964 break; 965 } 966 case HCI_INIT_CUSTOM_INIT: 967 log_info("Custom init"); 968 // Custom initialization 969 if (hci_stack->chipset && hci_stack->chipset->next_command){ 970 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 971 if (valid_cmd){ 972 int size = 3 + hci_stack->hci_packet_buffer[2]; 973 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 974 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 975 switch (valid_cmd) { 976 case 1: 977 default: 978 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 979 break; 980 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 981 log_info("CSR Warm Boot"); 982 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 983 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 984 btstack_run_loop_add_timer(&hci_stack->timeout); 985 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 986 && hci_stack->config 987 && hci_stack->chipset 988 // && hci_stack->chipset->set_baudrate_command -- there's no such command 989 && hci_stack->hci_transport->set_baudrate 990 && hci_transport_uart_get_main_baud_rate()){ 991 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 992 } else { 993 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 994 } 995 break; 996 } 997 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 998 break; 999 } 1000 log_info("hci_run: init script done"); 1001 1002 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1003 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1004 int need_baud_change = hci_stack->config 1005 && hci_stack->chipset 1006 && hci_stack->chipset->set_baudrate_command 1007 && hci_stack->hci_transport->set_baudrate 1008 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1009 if (need_baud_change) { 1010 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1011 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1012 hci_stack->hci_transport->set_baudrate(baud_rate); 1013 } 1014 } 1015 } 1016 // otherwise continue 1017 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1018 hci_send_cmd(&hci_read_local_supported_commands); 1019 break; 1020 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1021 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1022 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1023 hci_send_cmd(&hci_read_local_supported_commands); 1024 break; 1025 case HCI_INIT_SET_BD_ADDR: 1026 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1027 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1028 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1029 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1030 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1031 break; 1032 case HCI_INIT_READ_BD_ADDR: 1033 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1034 hci_send_cmd(&hci_read_bd_addr); 1035 break; 1036 case HCI_INIT_READ_BUFFER_SIZE: 1037 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1038 hci_send_cmd(&hci_read_buffer_size); 1039 break; 1040 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1041 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1042 hci_send_cmd(&hci_read_local_supported_features); 1043 break; 1044 case HCI_INIT_SET_EVENT_MASK: 1045 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1046 if (hci_le_supported()){ 1047 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1048 } else { 1049 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1050 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1051 } 1052 break; 1053 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1054 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1055 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1056 break; 1057 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1058 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1059 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1060 break; 1061 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1062 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1063 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1064 break; 1065 case HCI_INIT_WRITE_LOCAL_NAME: 1066 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1067 if (hci_stack->local_name){ 1068 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1069 } else { 1070 char local_name[30]; 1071 // BTstack-11:22:33:44:55:66 1072 strcpy(local_name, "BTstack "); 1073 strcat(local_name, bd_addr_to_str(hci_stack->local_bd_addr)); 1074 log_info("---> Name %s", local_name); 1075 hci_send_cmd(&hci_write_local_name, local_name); 1076 } 1077 break; 1078 case HCI_INIT_WRITE_SCAN_ENABLE: 1079 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1080 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1081 break; 1082 // only sent if ENABLE_SCO_OVER_HCI is defined 1083 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1084 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1085 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1086 break; 1087 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1088 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1089 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1090 break; 1091 #ifdef ENABLE_BLE 1092 // LE INIT 1093 case HCI_INIT_LE_READ_BUFFER_SIZE: 1094 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1095 hci_send_cmd(&hci_le_read_buffer_size); 1096 break; 1097 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1098 // LE Supported Host = 1, Simultaneous Host = 0 1099 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1100 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1101 break; 1102 case HCI_INIT_READ_WHITE_LIST_SIZE: 1103 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1104 hci_send_cmd(&hci_le_read_white_list_size); 1105 break; 1106 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1107 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1108 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1109 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1110 break; 1111 #endif 1112 default: 1113 return; 1114 } 1115 } 1116 1117 static void hci_init_done(void){ 1118 // done. tell the app 1119 log_info("hci_init_done -> HCI_STATE_WORKING"); 1120 hci_stack->state = HCI_STATE_WORKING; 1121 hci_emit_state(); 1122 hci_run(); 1123 } 1124 1125 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1126 uint8_t command_completed = 0; 1127 1128 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1129 uint16_t opcode = little_endian_read_16(packet,3); 1130 if (opcode == hci_stack->last_cmd_opcode){ 1131 command_completed = 1; 1132 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1133 } else { 1134 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1135 } 1136 } 1137 1138 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1139 uint8_t status = packet[2]; 1140 uint16_t opcode = little_endian_read_16(packet,4); 1141 if (opcode == hci_stack->last_cmd_opcode){ 1142 if (status){ 1143 command_completed = 1; 1144 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1145 } else { 1146 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1147 } 1148 } else { 1149 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1150 } 1151 } 1152 1153 // Vendor == CSR 1154 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1155 // TODO: track actual command 1156 command_completed = 1; 1157 } 1158 1159 // Vendor == Toshiba 1160 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1161 // TODO: track actual command 1162 command_completed = 1; 1163 } 1164 1165 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1166 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1167 // 1168 // HCI Reset 1169 // Timeout 100 ms 1170 // HCI Reset 1171 // Command Complete Reset 1172 // HCI Read Local Version Information 1173 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1174 // hang... 1175 // 1176 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1177 if (!command_completed 1178 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1179 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1180 1181 uint16_t opcode = little_endian_read_16(packet,3); 1182 if (opcode == hci_reset.opcode){ 1183 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1184 return; 1185 } 1186 } 1187 1188 // CSR & H5 1189 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1190 if (!command_completed 1191 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1192 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1193 1194 uint16_t opcode = little_endian_read_16(packet,3); 1195 if (opcode == hci_reset.opcode){ 1196 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1197 return; 1198 } 1199 } 1200 1201 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1202 // fix: Correct substate and behave as command below 1203 if (command_completed){ 1204 switch (hci_stack->substate){ 1205 case HCI_INIT_SEND_RESET: 1206 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1207 break; 1208 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1209 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1210 break; 1211 default: 1212 break; 1213 } 1214 } 1215 1216 1217 if (!command_completed) return; 1218 1219 int need_baud_change = hci_stack->config 1220 && hci_stack->chipset 1221 && hci_stack->chipset->set_baudrate_command 1222 && hci_stack->hci_transport->set_baudrate 1223 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1224 1225 int need_addr_change = hci_stack->custom_bd_addr_set 1226 && hci_stack->chipset 1227 && hci_stack->chipset->set_bd_addr_command; 1228 1229 switch(hci_stack->substate){ 1230 case HCI_INIT_SEND_RESET: 1231 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1232 // fix: just correct substate and behave as command below 1233 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1234 btstack_run_loop_remove_timer(&hci_stack->timeout); 1235 break; 1236 case HCI_INIT_W4_SEND_RESET: 1237 btstack_run_loop_remove_timer(&hci_stack->timeout); 1238 break; 1239 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1240 log_info("Received local version info, need baud change %u", need_baud_change); 1241 if (need_baud_change){ 1242 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1243 return; 1244 } 1245 // skip baud change 1246 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1247 return; 1248 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1249 // for STLC2500D, baud rate change already happened. 1250 // for others, baud rate gets changed now 1251 if (hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS){ 1252 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1253 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1254 hci_stack->hci_transport->set_baudrate(baud_rate); 1255 } 1256 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1257 return; 1258 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1259 btstack_run_loop_remove_timer(&hci_stack->timeout); 1260 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1261 return; 1262 case HCI_INIT_W4_CUSTOM_INIT: 1263 // repeat custom init 1264 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1265 return; 1266 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1267 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1268 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1269 return; 1270 } 1271 if (need_addr_change){ 1272 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1273 return; 1274 } 1275 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1276 return; 1277 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: { 1278 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1279 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1280 hci_stack->hci_transport->set_baudrate(baud_rate); 1281 if (need_addr_change){ 1282 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1283 return; 1284 } 1285 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1286 return; 1287 } 1288 case HCI_INIT_W4_SET_BD_ADDR: 1289 // for STLC2500D, bd addr change only gets active after sending reset command 1290 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1291 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1292 return; 1293 } 1294 // skipping st warm boot 1295 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1296 return; 1297 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1298 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1299 return; 1300 case HCI_INIT_W4_READ_BD_ADDR: 1301 // only read buffer size if supported 1302 if (hci_stack->local_supported_commands[0] & 0x01) { 1303 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1304 return; 1305 } 1306 // skipping read buffer size 1307 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1308 return; 1309 case HCI_INIT_W4_SET_EVENT_MASK: 1310 // skip Classic init commands for LE only chipsets 1311 if (!hci_classic_supported()){ 1312 if (hci_le_supported()){ 1313 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1314 return; 1315 } else { 1316 log_error("Neither BR/EDR nor LE supported"); 1317 hci_init_done(); 1318 return; 1319 } 1320 } 1321 if (!gap_ssp_supported()){ 1322 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1323 return; 1324 } 1325 break; 1326 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1327 break; 1328 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1329 // skip write le host if not supported (e.g. on LE only EM9301) 1330 if (hci_stack->local_supported_commands[0] & 0x02) break; 1331 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1332 return; 1333 1334 #ifdef ENABLE_SCO_OVER_HCI 1335 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1336 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1337 break; 1338 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1339 if (!hci_le_supported()){ 1340 // SKIP LE init for Classic only configuration 1341 hci_init_done(); 1342 return; 1343 } 1344 break; 1345 #else 1346 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1347 if (!hci_le_supported()){ 1348 // SKIP LE init for Classic only configuration 1349 hci_init_done(); 1350 return; 1351 } 1352 #endif 1353 break; 1354 // Response to command before init done state -> init done 1355 case (HCI_INIT_DONE-1): 1356 hci_init_done(); 1357 return; 1358 1359 default: 1360 break; 1361 } 1362 hci_initializing_next_state(); 1363 } 1364 1365 static void event_handler(uint8_t *packet, int size){ 1366 1367 uint16_t event_length = packet[1]; 1368 1369 // assert packet is complete 1370 if (size != event_length + 2){ 1371 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1372 return; 1373 } 1374 1375 bd_addr_t addr; 1376 bd_addr_type_t addr_type; 1377 uint8_t link_type; 1378 hci_con_handle_t handle; 1379 hci_connection_t * conn; 1380 int i; 1381 1382 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1383 1384 switch (hci_event_packet_get_type(packet)) { 1385 1386 case HCI_EVENT_COMMAND_COMPLETE: 1387 // get num cmd packets 1388 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1389 hci_stack->num_cmd_packets = packet[2]; 1390 1391 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1392 // from offset 5 1393 // status 1394 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1395 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1396 hci_stack->sco_data_packet_length = packet[8]; 1397 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1398 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1399 1400 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1401 // determine usable ACL payload size 1402 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1403 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1404 } 1405 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1406 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1407 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1408 } 1409 } 1410 #ifdef ENABLE_BLE 1411 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1412 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1413 hci_stack->le_acl_packets_total_num = packet[8]; 1414 // determine usable ACL payload size 1415 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1416 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1417 } 1418 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1419 } 1420 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1421 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1422 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1423 } 1424 #endif 1425 // Dump local address 1426 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1427 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1428 hci_stack->local_bd_addr); 1429 log_info("Local Address, Status: 0x%02x: Addr: %s", 1430 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1431 if (hci_stack->link_key_db){ 1432 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1433 } 1434 } 1435 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1436 hci_emit_discoverable_enabled(hci_stack->discoverable); 1437 } 1438 // Note: HCI init checks 1439 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1440 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1441 1442 // determine usable ACL packet types based on host buffer size and supported features 1443 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1444 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1445 1446 // Classic/LE 1447 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1448 } 1449 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1450 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1451 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1452 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1453 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1454 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1455 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1456 // notify app 1457 if (hci_stack->local_version_information_callback){ 1458 hci_stack->local_version_information_callback(packet); 1459 } 1460 } 1461 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1462 hci_stack->local_supported_commands[0] = 1463 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1464 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1465 } 1466 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1467 if (packet[5] == 0){ 1468 hci_stack->synchronous_flow_control_enabled = 1; 1469 } 1470 } 1471 break; 1472 1473 case HCI_EVENT_COMMAND_STATUS: 1474 // get num cmd packets 1475 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1476 hci_stack->num_cmd_packets = packet[3]; 1477 break; 1478 1479 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1480 int offset = 3; 1481 for (i=0; i<packet[2];i++){ 1482 handle = little_endian_read_16(packet, offset); 1483 offset += 2; 1484 uint16_t num_packets = little_endian_read_16(packet, offset); 1485 offset += 2; 1486 1487 conn = hci_connection_for_handle(handle); 1488 if (!conn){ 1489 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1490 continue; 1491 } 1492 1493 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1494 if (conn->num_sco_packets_sent >= num_packets){ 1495 conn->num_sco_packets_sent -= num_packets; 1496 } else { 1497 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1498 conn->num_sco_packets_sent = 0; 1499 } 1500 hci_notify_if_sco_can_send_now(); 1501 } else { 1502 if (conn->num_acl_packets_sent >= num_packets){ 1503 conn->num_acl_packets_sent -= num_packets; 1504 } else { 1505 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1506 conn->num_acl_packets_sent = 0; 1507 } 1508 } 1509 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1510 } 1511 break; 1512 } 1513 case HCI_EVENT_CONNECTION_REQUEST: 1514 reverse_bd_addr(&packet[2], addr); 1515 // TODO: eval COD 8-10 1516 link_type = packet[11]; 1517 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1518 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1519 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1520 if (!conn) { 1521 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1522 } 1523 if (!conn) { 1524 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1525 hci_stack->decline_reason = 0x0d; 1526 bd_addr_copy(hci_stack->decline_addr, addr); 1527 break; 1528 } 1529 conn->role = HCI_ROLE_SLAVE; 1530 conn->state = RECEIVED_CONNECTION_REQUEST; 1531 // store info about eSCO 1532 if (link_type == 0x02){ 1533 conn->remote_supported_feature_eSCO = 1; 1534 } 1535 hci_run(); 1536 break; 1537 1538 case HCI_EVENT_CONNECTION_COMPLETE: 1539 // Connection management 1540 reverse_bd_addr(&packet[5], addr); 1541 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1542 addr_type = BD_ADDR_TYPE_CLASSIC; 1543 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1544 if (conn) { 1545 if (!packet[2]){ 1546 conn->state = OPEN; 1547 conn->con_handle = little_endian_read_16(packet, 3); 1548 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1549 1550 // restart timer 1551 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1552 btstack_run_loop_add_timer(&conn->timeout); 1553 1554 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1555 1556 hci_emit_nr_connections_changed(); 1557 } else { 1558 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1559 uint8_t status = packet[2]; 1560 bd_addr_t bd_address; 1561 memcpy(&bd_address, conn->address, 6); 1562 1563 // connection failed, remove entry 1564 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1565 btstack_memory_hci_connection_free( conn ); 1566 1567 // notify client if dedicated bonding 1568 if (notify_dedicated_bonding_failed){ 1569 log_info("hci notify_dedicated_bonding_failed"); 1570 hci_emit_dedicated_bonding_result(bd_address, status); 1571 } 1572 1573 // if authentication error, also delete link key 1574 if (packet[2] == 0x05) { 1575 gap_drop_link_key_for_bd_addr(addr); 1576 } 1577 } 1578 } 1579 break; 1580 1581 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1582 reverse_bd_addr(&packet[5], addr); 1583 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1584 if (packet[2]){ 1585 // connection failed 1586 break; 1587 } 1588 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1589 if (!conn) { 1590 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1591 } 1592 if (!conn) { 1593 break; 1594 } 1595 conn->state = OPEN; 1596 conn->con_handle = little_endian_read_16(packet, 3); 1597 break; 1598 1599 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1600 handle = little_endian_read_16(packet, 3); 1601 conn = hci_connection_for_handle(handle); 1602 if (!conn) break; 1603 if (!packet[2]){ 1604 uint8_t * features = &packet[5]; 1605 if (features[6] & (1 << 3)){ 1606 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1607 } 1608 if (features[3] & (1<<7)){ 1609 conn->remote_supported_feature_eSCO = 1; 1610 } 1611 } 1612 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1613 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1614 if (conn->bonding_flags & BONDING_DEDICATED){ 1615 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1616 } 1617 break; 1618 1619 case HCI_EVENT_LINK_KEY_REQUEST: 1620 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1621 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1622 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1623 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1624 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1625 hci_run(); 1626 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1627 return; 1628 1629 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1630 reverse_bd_addr(&packet[2], addr); 1631 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1632 if (!conn) break; 1633 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1634 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1635 // Change Connection Encryption keeps link key type 1636 if (link_key_type != CHANGED_COMBINATION_KEY){ 1637 conn->link_key_type = link_key_type; 1638 } 1639 if (!hci_stack->link_key_db) break; 1640 hci_stack->link_key_db->put_link_key(addr, &packet[8], conn->link_key_type); 1641 // still forward event to allow dismiss of pairing dialog 1642 break; 1643 } 1644 1645 case HCI_EVENT_PIN_CODE_REQUEST: 1646 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1647 // non-bondable mode: pin code negative reply will be sent 1648 if (!hci_stack->bondable){ 1649 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1650 hci_run(); 1651 return; 1652 } 1653 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1654 if (!hci_stack->link_key_db) break; 1655 hci_event_pin_code_request_get_bd_addr(packet, addr); 1656 hci_stack->link_key_db->delete_link_key(addr); 1657 break; 1658 1659 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1660 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1661 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1662 break; 1663 1664 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1665 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1666 if (!hci_stack->ssp_auto_accept) break; 1667 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1668 break; 1669 1670 case HCI_EVENT_USER_PASSKEY_REQUEST: 1671 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1672 if (!hci_stack->ssp_auto_accept) break; 1673 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1674 break; 1675 1676 case HCI_EVENT_ENCRYPTION_CHANGE: 1677 handle = little_endian_read_16(packet, 3); 1678 conn = hci_connection_for_handle(handle); 1679 if (!conn) break; 1680 if (packet[2] == 0) { 1681 if (packet[5]){ 1682 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1683 } else { 1684 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1685 } 1686 } 1687 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1688 break; 1689 1690 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1691 handle = little_endian_read_16(packet, 3); 1692 conn = hci_connection_for_handle(handle); 1693 if (!conn) break; 1694 1695 // dedicated bonding: send result and disconnect 1696 if (conn->bonding_flags & BONDING_DEDICATED){ 1697 conn->bonding_flags &= ~BONDING_DEDICATED; 1698 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1699 conn->bonding_status = packet[2]; 1700 break; 1701 } 1702 1703 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1704 // link key sufficient for requested security 1705 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1706 break; 1707 } 1708 // not enough 1709 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1710 break; 1711 1712 // HCI_EVENT_DISCONNECTION_COMPLETE 1713 // has been split, to first notify stack before shutting connection down 1714 // see end of function, too. 1715 case HCI_EVENT_DISCONNECTION_COMPLETE: 1716 if (packet[2]) break; // status != 0 1717 handle = little_endian_read_16(packet, 3); 1718 conn = hci_connection_for_handle(handle); 1719 if (!conn) break; // no conn struct anymore 1720 // re-enable advertisements for le connections if active 1721 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1722 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1723 } 1724 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1725 break; 1726 1727 case HCI_EVENT_HARDWARE_ERROR: 1728 if (hci_stack->hardware_error_callback){ 1729 (*hci_stack->hardware_error_callback)(); 1730 } else { 1731 // if no special requests, just reboot stack 1732 hci_power_control_off(); 1733 hci_power_control_on(); 1734 } 1735 break; 1736 1737 case HCI_EVENT_ROLE_CHANGE: 1738 if (packet[2]) break; // status != 0 1739 handle = little_endian_read_16(packet, 3); 1740 conn = hci_connection_for_handle(handle); 1741 if (!conn) break; // no conn 1742 conn->role = packet[9]; 1743 break; 1744 1745 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1746 // release packet buffer only for asynchronous transport and if there are not further fragements 1747 if (hci_transport_synchronous()) { 1748 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1749 return; // instead of break: to avoid re-entering hci_run() 1750 } 1751 if (hci_stack->acl_fragmentation_total_size) break; 1752 hci_release_packet_buffer(); 1753 1754 // L2CAP receives this event via the hci_emit_event below 1755 1756 // For SCO, we do the can_send_now_check here 1757 hci_notify_if_sco_can_send_now(); 1758 break; 1759 1760 case HCI_EVENT_SCO_CAN_SEND_NOW: 1761 // For SCO, we do the can_send_now_check here 1762 hci_notify_if_sco_can_send_now(); 1763 return; 1764 1765 #ifdef ENABLE_BLE 1766 case HCI_EVENT_LE_META: 1767 switch (packet[2]){ 1768 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1769 // log_info("advertising report received"); 1770 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1771 le_handle_advertisement_report(packet, size); 1772 break; 1773 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1774 // Connection management 1775 reverse_bd_addr(&packet[8], addr); 1776 addr_type = (bd_addr_type_t)packet[7]; 1777 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1778 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1779 // if auto-connect, remove from whitelist in both roles 1780 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1781 hci_remove_from_whitelist(addr_type, addr); 1782 } 1783 // handle error: error is reported only to the initiator -> outgoing connection 1784 if (packet[3]){ 1785 // outgoing connection establishment is done 1786 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1787 // remove entry 1788 if (conn){ 1789 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1790 btstack_memory_hci_connection_free( conn ); 1791 } 1792 break; 1793 } 1794 // on success, both hosts receive connection complete event 1795 if (packet[6] == HCI_ROLE_MASTER){ 1796 // if we're master, it was an outgoing connection and we're done with it 1797 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1798 } else { 1799 // if we're slave, it was an incoming connection, advertisements have stopped 1800 hci_stack->le_advertisements_active = 0; 1801 } 1802 // LE connections are auto-accepted, so just create a connection if there isn't one already 1803 if (!conn){ 1804 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1805 } 1806 // no memory, sorry. 1807 if (!conn){ 1808 break; 1809 } 1810 1811 conn->state = OPEN; 1812 conn->role = packet[6]; 1813 conn->con_handle = little_endian_read_16(packet, 4); 1814 1815 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1816 1817 // restart timer 1818 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1819 // btstack_run_loop_add_timer(&conn->timeout); 1820 1821 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1822 1823 hci_emit_nr_connections_changed(); 1824 break; 1825 1826 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1827 1828 default: 1829 break; 1830 } 1831 break; 1832 #endif 1833 default: 1834 break; 1835 } 1836 1837 // handle BT initialization 1838 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1839 hci_initializing_event_handler(packet, size); 1840 } 1841 1842 // help with BT sleep 1843 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1844 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1845 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1846 hci_initializing_next_state(); 1847 } 1848 1849 // notify upper stack 1850 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1851 1852 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1853 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1854 if (!packet[2]){ 1855 handle = little_endian_read_16(packet, 3); 1856 hci_connection_t * aConn = hci_connection_for_handle(handle); 1857 if (aConn) { 1858 uint8_t status = aConn->bonding_status; 1859 uint16_t flags = aConn->bonding_flags; 1860 bd_addr_t bd_address; 1861 memcpy(&bd_address, aConn->address, 6); 1862 hci_shutdown_connection(aConn); 1863 // connection struct is gone, don't access anymore 1864 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1865 hci_emit_dedicated_bonding_result(bd_address, status); 1866 } 1867 } 1868 } 1869 } 1870 1871 // execute main loop 1872 hci_run(); 1873 } 1874 1875 static void sco_handler(uint8_t * packet, uint16_t size){ 1876 if (!hci_stack->sco_packet_handler) return; 1877 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1878 } 1879 1880 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1881 hci_dump_packet(packet_type, 1, packet, size); 1882 switch (packet_type) { 1883 case HCI_EVENT_PACKET: 1884 event_handler(packet, size); 1885 break; 1886 case HCI_ACL_DATA_PACKET: 1887 acl_handler(packet, size); 1888 break; 1889 case HCI_SCO_DATA_PACKET: 1890 sco_handler(packet, size); 1891 default: 1892 break; 1893 } 1894 } 1895 1896 /** 1897 * @brief Add event packet handler. 1898 */ 1899 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1900 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1901 } 1902 1903 1904 /** Register HCI packet handlers */ 1905 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 1906 hci_stack->acl_packet_handler = handler; 1907 } 1908 1909 /** 1910 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1911 */ 1912 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 1913 hci_stack->sco_packet_handler = handler; 1914 } 1915 1916 static void hci_state_reset(void){ 1917 // no connections yet 1918 hci_stack->connections = NULL; 1919 1920 // keep discoverable/connectable as this has been requested by the client(s) 1921 // hci_stack->discoverable = 0; 1922 // hci_stack->connectable = 0; 1923 // hci_stack->bondable = 1; 1924 1925 // buffer is free 1926 hci_stack->hci_packet_buffer_reserved = 0; 1927 1928 // no pending cmds 1929 hci_stack->decline_reason = 0; 1930 hci_stack->new_scan_enable_value = 0xff; 1931 1932 // LE 1933 hci_stack->adv_addr_type = 0; 1934 memset(hci_stack->adv_address, 0, 6); 1935 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1936 hci_stack->le_scan_type = 0xff; 1937 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1938 hci_stack->le_whitelist = 0; 1939 hci_stack->le_whitelist_capacity = 0; 1940 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1941 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1942 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1943 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1944 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1945 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1946 } 1947 1948 /** 1949 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1950 */ 1951 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1952 // store and open remote device db 1953 hci_stack->link_key_db = link_key_db; 1954 if (hci_stack->link_key_db) { 1955 hci_stack->link_key_db->open(); 1956 } 1957 } 1958 1959 void hci_init(const hci_transport_t *transport, const void *config){ 1960 1961 #ifdef HAVE_MALLOC 1962 if (!hci_stack) { 1963 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1964 } 1965 #else 1966 hci_stack = &hci_stack_static; 1967 #endif 1968 memset(hci_stack, 0, sizeof(hci_stack_t)); 1969 1970 // reference to use transport layer implementation 1971 hci_stack->hci_transport = transport; 1972 1973 // reference to used config 1974 hci_stack->config = config; 1975 1976 // max acl payload size defined in config.h 1977 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1978 1979 // register packet handlers with transport 1980 transport->register_packet_handler(&packet_handler); 1981 1982 hci_stack->state = HCI_STATE_OFF; 1983 1984 // class of device 1985 hci_stack->class_of_device = 0x007a020c; // Smartphone 1986 1987 // bondable by default 1988 hci_stack->bondable = 1; 1989 1990 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1991 hci_stack->ssp_enable = 1; 1992 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1993 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1994 hci_stack->ssp_auto_accept = 1; 1995 1996 // voice setting - signed 8 bit pcm data with CVSD over the air 1997 hci_stack->sco_voice_setting = 0x40; 1998 1999 hci_state_reset(); 2000 } 2001 2002 /** 2003 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2004 */ 2005 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2006 hci_stack->chipset = chipset_driver; 2007 2008 // reset chipset driver - init is also called on power_up 2009 if (hci_stack->chipset && hci_stack->chipset->init){ 2010 hci_stack->chipset->init(hci_stack->config); 2011 } 2012 } 2013 2014 /** 2015 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2016 */ 2017 void hci_set_control(const btstack_control_t *hardware_control){ 2018 // references to used control implementation 2019 hci_stack->control = hardware_control; 2020 // init with transport config 2021 hardware_control->init(hci_stack->config); 2022 } 2023 2024 void hci_close(void){ 2025 // close remote device db 2026 if (hci_stack->link_key_db) { 2027 hci_stack->link_key_db->close(); 2028 } 2029 while (hci_stack->connections) { 2030 // cancel all l2cap connections 2031 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 2032 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 2033 } 2034 hci_power_control(HCI_POWER_OFF); 2035 2036 #ifdef HAVE_MALLOC 2037 free(hci_stack); 2038 #endif 2039 hci_stack = NULL; 2040 } 2041 2042 void gap_set_class_of_device(uint32_t class_of_device){ 2043 hci_stack->class_of_device = class_of_device; 2044 } 2045 2046 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2047 void hci_set_bd_addr(bd_addr_t addr){ 2048 memcpy(hci_stack->custom_bd_addr, addr, 6); 2049 hci_stack->custom_bd_addr_set = 1; 2050 } 2051 2052 void hci_disable_l2cap_timeout_check(void){ 2053 disable_l2cap_timeouts = 1; 2054 } 2055 // State-Module-Driver overview 2056 // state module low-level 2057 // HCI_STATE_OFF off close 2058 // HCI_STATE_INITIALIZING, on open 2059 // HCI_STATE_WORKING, on open 2060 // HCI_STATE_HALTING, on open 2061 // HCI_STATE_SLEEPING, off/sleep close 2062 // HCI_STATE_FALLING_ASLEEP on open 2063 2064 static int hci_power_control_on(void){ 2065 2066 // power on 2067 int err = 0; 2068 if (hci_stack->control && hci_stack->control->on){ 2069 err = (*hci_stack->control->on)(); 2070 } 2071 if (err){ 2072 log_error( "POWER_ON failed"); 2073 hci_emit_hci_open_failed(); 2074 return err; 2075 } 2076 2077 // int chipset driver 2078 if (hci_stack->chipset && hci_stack->chipset->init){ 2079 hci_stack->chipset->init(hci_stack->config); 2080 } 2081 2082 // init transport 2083 if (hci_stack->hci_transport->init){ 2084 hci_stack->hci_transport->init(hci_stack->config); 2085 } 2086 2087 // open transport 2088 err = hci_stack->hci_transport->open(); 2089 if (err){ 2090 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2091 if (hci_stack->control && hci_stack->control->off){ 2092 (*hci_stack->control->off)(); 2093 } 2094 hci_emit_hci_open_failed(); 2095 return err; 2096 } 2097 return 0; 2098 } 2099 2100 static void hci_power_control_off(void){ 2101 2102 log_info("hci_power_control_off"); 2103 2104 // close low-level device 2105 hci_stack->hci_transport->close(); 2106 2107 log_info("hci_power_control_off - hci_transport closed"); 2108 2109 // power off 2110 if (hci_stack->control && hci_stack->control->off){ 2111 (*hci_stack->control->off)(); 2112 } 2113 2114 log_info("hci_power_control_off - control closed"); 2115 2116 hci_stack->state = HCI_STATE_OFF; 2117 } 2118 2119 static void hci_power_control_sleep(void){ 2120 2121 log_info("hci_power_control_sleep"); 2122 2123 #if 0 2124 // don't close serial port during sleep 2125 2126 // close low-level device 2127 hci_stack->hci_transport->close(hci_stack->config); 2128 #endif 2129 2130 // sleep mode 2131 if (hci_stack->control && hci_stack->control->sleep){ 2132 (*hci_stack->control->sleep)(); 2133 } 2134 2135 hci_stack->state = HCI_STATE_SLEEPING; 2136 } 2137 2138 static int hci_power_control_wake(void){ 2139 2140 log_info("hci_power_control_wake"); 2141 2142 // wake on 2143 if (hci_stack->control && hci_stack->control->wake){ 2144 (*hci_stack->control->wake)(); 2145 } 2146 2147 #if 0 2148 // open low-level device 2149 int err = hci_stack->hci_transport->open(hci_stack->config); 2150 if (err){ 2151 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2152 if (hci_stack->control && hci_stack->control->off){ 2153 (*hci_stack->control->off)(); 2154 } 2155 hci_emit_hci_open_failed(); 2156 return err; 2157 } 2158 #endif 2159 2160 return 0; 2161 } 2162 2163 static void hci_power_transition_to_initializing(void){ 2164 // set up state machine 2165 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2166 hci_stack->hci_packet_buffer_reserved = 0; 2167 hci_stack->state = HCI_STATE_INITIALIZING; 2168 hci_stack->substate = HCI_INIT_SEND_RESET; 2169 } 2170 2171 int hci_power_control(HCI_POWER_MODE power_mode){ 2172 2173 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2174 2175 int err = 0; 2176 switch (hci_stack->state){ 2177 2178 case HCI_STATE_OFF: 2179 switch (power_mode){ 2180 case HCI_POWER_ON: 2181 err = hci_power_control_on(); 2182 if (err) { 2183 log_error("hci_power_control_on() error %u", err); 2184 return err; 2185 } 2186 hci_power_transition_to_initializing(); 2187 break; 2188 case HCI_POWER_OFF: 2189 // do nothing 2190 break; 2191 case HCI_POWER_SLEEP: 2192 // do nothing (with SLEEP == OFF) 2193 break; 2194 } 2195 break; 2196 2197 case HCI_STATE_INITIALIZING: 2198 switch (power_mode){ 2199 case HCI_POWER_ON: 2200 // do nothing 2201 break; 2202 case HCI_POWER_OFF: 2203 // no connections yet, just turn it off 2204 hci_power_control_off(); 2205 break; 2206 case HCI_POWER_SLEEP: 2207 // no connections yet, just turn it off 2208 hci_power_control_sleep(); 2209 break; 2210 } 2211 break; 2212 2213 case HCI_STATE_WORKING: 2214 switch (power_mode){ 2215 case HCI_POWER_ON: 2216 // do nothing 2217 break; 2218 case HCI_POWER_OFF: 2219 // see hci_run 2220 hci_stack->state = HCI_STATE_HALTING; 2221 break; 2222 case HCI_POWER_SLEEP: 2223 // see hci_run 2224 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2225 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2226 break; 2227 } 2228 break; 2229 2230 case HCI_STATE_HALTING: 2231 switch (power_mode){ 2232 case HCI_POWER_ON: 2233 hci_power_transition_to_initializing(); 2234 break; 2235 case HCI_POWER_OFF: 2236 // do nothing 2237 break; 2238 case HCI_POWER_SLEEP: 2239 // see hci_run 2240 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2241 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2242 break; 2243 } 2244 break; 2245 2246 case HCI_STATE_FALLING_ASLEEP: 2247 switch (power_mode){ 2248 case HCI_POWER_ON: 2249 2250 #ifdef HAVE_PLATFORM_IPHONE_OS 2251 // nothing to do, if H4 supports power management 2252 if (btstack_control_iphone_power_management_enabled()){ 2253 hci_stack->state = HCI_STATE_INITIALIZING; 2254 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2255 break; 2256 } 2257 #endif 2258 hci_power_transition_to_initializing(); 2259 break; 2260 case HCI_POWER_OFF: 2261 // see hci_run 2262 hci_stack->state = HCI_STATE_HALTING; 2263 break; 2264 case HCI_POWER_SLEEP: 2265 // do nothing 2266 break; 2267 } 2268 break; 2269 2270 case HCI_STATE_SLEEPING: 2271 switch (power_mode){ 2272 case HCI_POWER_ON: 2273 2274 #ifdef HAVE_PLATFORM_IPHONE_OS 2275 // nothing to do, if H4 supports power management 2276 if (btstack_control_iphone_power_management_enabled()){ 2277 hci_stack->state = HCI_STATE_INITIALIZING; 2278 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2279 hci_update_scan_enable(); 2280 break; 2281 } 2282 #endif 2283 err = hci_power_control_wake(); 2284 if (err) return err; 2285 hci_power_transition_to_initializing(); 2286 break; 2287 case HCI_POWER_OFF: 2288 hci_stack->state = HCI_STATE_HALTING; 2289 break; 2290 case HCI_POWER_SLEEP: 2291 // do nothing 2292 break; 2293 } 2294 break; 2295 } 2296 2297 // create internal event 2298 hci_emit_state(); 2299 2300 // trigger next/first action 2301 hci_run(); 2302 2303 return 0; 2304 } 2305 2306 static void hci_update_scan_enable(void){ 2307 // 2 = page scan, 1 = inq scan 2308 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2309 hci_run(); 2310 } 2311 2312 void gap_discoverable_control(uint8_t enable){ 2313 if (enable) enable = 1; // normalize argument 2314 2315 if (hci_stack->discoverable == enable){ 2316 hci_emit_discoverable_enabled(hci_stack->discoverable); 2317 return; 2318 } 2319 2320 hci_stack->discoverable = enable; 2321 hci_update_scan_enable(); 2322 } 2323 2324 void gap_connectable_control(uint8_t enable){ 2325 if (enable) enable = 1; // normalize argument 2326 2327 // don't emit event 2328 if (hci_stack->connectable == enable) return; 2329 2330 hci_stack->connectable = enable; 2331 hci_update_scan_enable(); 2332 } 2333 2334 void gap_local_bd_addr(bd_addr_t address_buffer){ 2335 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2336 } 2337 2338 static void hci_run(void){ 2339 2340 // log_info("hci_run: entered"); 2341 btstack_linked_item_t * it; 2342 2343 // send continuation fragments first, as they block the prepared packet buffer 2344 if (hci_stack->acl_fragmentation_total_size > 0) { 2345 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2346 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2347 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2348 if (connection) { 2349 hci_send_acl_packet_fragments(connection); 2350 return; 2351 } 2352 // connection gone -> discard further fragments 2353 hci_stack->acl_fragmentation_total_size = 0; 2354 hci_stack->acl_fragmentation_pos = 0; 2355 } 2356 } 2357 2358 if (!hci_can_send_command_packet_now()) return; 2359 2360 // global/non-connection oriented commands 2361 2362 // decline incoming connections 2363 if (hci_stack->decline_reason){ 2364 uint8_t reason = hci_stack->decline_reason; 2365 hci_stack->decline_reason = 0; 2366 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2367 return; 2368 } 2369 2370 // send scan enable 2371 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2372 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2373 hci_stack->new_scan_enable_value = 0xff; 2374 return; 2375 } 2376 2377 #ifdef ENABLE_BLE 2378 if (hci_stack->state == HCI_STATE_WORKING){ 2379 // handle le scan 2380 switch(hci_stack->le_scanning_state){ 2381 case LE_START_SCAN: 2382 hci_stack->le_scanning_state = LE_SCANNING; 2383 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2384 return; 2385 2386 case LE_STOP_SCAN: 2387 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2388 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2389 return; 2390 default: 2391 break; 2392 } 2393 if (hci_stack->le_scan_type != 0xff){ 2394 // defaults: active scanning, accept all advertisement packets 2395 int scan_type = hci_stack->le_scan_type; 2396 hci_stack->le_scan_type = 0xff; 2397 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); 2398 return; 2399 } 2400 // le advertisement control 2401 if (hci_stack->le_advertisements_todo){ 2402 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2403 } 2404 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2405 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2406 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2407 return; 2408 } 2409 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2410 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2411 hci_send_cmd(&hci_le_set_advertising_parameters, 2412 hci_stack->le_advertisements_interval_min, 2413 hci_stack->le_advertisements_interval_max, 2414 hci_stack->le_advertisements_type, 2415 hci_stack->le_advertisements_own_address_type, 2416 hci_stack->le_advertisements_direct_address_type, 2417 hci_stack->le_advertisements_direct_address, 2418 hci_stack->le_advertisements_channel_map, 2419 hci_stack->le_advertisements_filter_policy); 2420 return; 2421 } 2422 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2423 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2424 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2425 hci_stack->le_advertisements_data); 2426 return; 2427 } 2428 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2429 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2430 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2431 hci_stack->le_scan_response_data); 2432 return; 2433 } 2434 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2435 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2436 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2437 return; 2438 } 2439 2440 // 2441 // LE Whitelist Management 2442 // 2443 2444 // check if whitelist needs modification 2445 btstack_linked_list_iterator_t lit; 2446 int modification_pending = 0; 2447 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2448 while (btstack_linked_list_iterator_has_next(&lit)){ 2449 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2450 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2451 modification_pending = 1; 2452 break; 2453 } 2454 } 2455 2456 if (modification_pending){ 2457 // stop connnecting if modification pending 2458 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2459 hci_send_cmd(&hci_le_create_connection_cancel); 2460 return; 2461 } 2462 2463 // add/remove entries 2464 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2465 while (btstack_linked_list_iterator_has_next(&lit)){ 2466 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2467 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2468 entry->state = LE_WHITELIST_ON_CONTROLLER; 2469 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2470 return; 2471 2472 } 2473 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2474 bd_addr_t address; 2475 bd_addr_type_t address_type = entry->address_type; 2476 memcpy(address, entry->address, 6); 2477 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2478 btstack_memory_whitelist_entry_free(entry); 2479 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2480 return; 2481 } 2482 } 2483 } 2484 2485 // start connecting 2486 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2487 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2488 bd_addr_t null_addr; 2489 memset(null_addr, 0, 6); 2490 hci_send_cmd(&hci_le_create_connection, 2491 0x0060, // scan interval: 60 ms 2492 0x0030, // scan interval: 30 ms 2493 1, // use whitelist 2494 0, // peer address type 2495 null_addr, // peer bd addr 2496 hci_stack->adv_addr_type, // our addr type: 2497 0x0008, // conn interval min 2498 0x0018, // conn interval max 2499 0, // conn latency 2500 0x0048, // supervision timeout 2501 0x0001, // min ce length 2502 0x0001 // max ce length 2503 ); 2504 return; 2505 } 2506 } 2507 #endif 2508 2509 // send pending HCI commands 2510 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2511 hci_connection_t * connection = (hci_connection_t *) it; 2512 2513 switch(connection->state){ 2514 case SEND_CREATE_CONNECTION: 2515 switch(connection->address_type){ 2516 case BD_ADDR_TYPE_CLASSIC: 2517 log_info("sending hci_create_connection"); 2518 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2519 break; 2520 default: 2521 #ifdef ENABLE_BLE 2522 log_info("sending hci_le_create_connection"); 2523 hci_send_cmd(&hci_le_create_connection, 2524 0x0060, // scan interval: 60 ms 2525 0x0030, // scan interval: 30 ms 2526 0, // don't use whitelist 2527 connection->address_type, // peer address type 2528 connection->address, // peer bd addr 2529 hci_stack->adv_addr_type, // our addr type: 2530 0x0008, // conn interval min 2531 0x0018, // conn interval max 2532 0, // conn latency 2533 0x0048, // supervision timeout 2534 0x0001, // min ce length 2535 0x0001 // max ce length 2536 ); 2537 2538 connection->state = SENT_CREATE_CONNECTION; 2539 #endif 2540 break; 2541 } 2542 return; 2543 2544 case RECEIVED_CONNECTION_REQUEST: 2545 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2546 connection->state = ACCEPTED_CONNECTION_REQUEST; 2547 connection->role = HCI_ROLE_SLAVE; 2548 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2549 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 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, 0, 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, 0, 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