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) return; 267 hci_stack->link_key_db->delete_link_key(addr); 268 } 269 270 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 271 if (!hci_stack->link_key_db) return; 272 hci_stack->link_key_db->put_link_key(addr, link_key, type); 273 } 274 275 static int hci_is_le_connection(hci_connection_t * connection){ 276 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 277 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 278 } 279 280 /** 281 * count connections 282 */ 283 static int nr_hci_connections(void){ 284 int count = 0; 285 btstack_linked_item_t *it; 286 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 287 return count; 288 } 289 290 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 291 292 int num_packets_sent_classic = 0; 293 int num_packets_sent_le = 0; 294 295 btstack_linked_item_t *it; 296 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 297 hci_connection_t * connection = (hci_connection_t *) it; 298 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 299 num_packets_sent_classic += connection->num_acl_packets_sent; 300 } else { 301 num_packets_sent_le += connection->num_acl_packets_sent; 302 } 303 } 304 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 305 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 306 int free_slots_le = 0; 307 308 if (free_slots_classic < 0){ 309 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); 310 return 0; 311 } 312 313 if (hci_stack->le_acl_packets_total_num){ 314 // if we have LE slots, they are used 315 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 316 if (free_slots_le < 0){ 317 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); 318 return 0; 319 } 320 } else { 321 // otherwise, classic slots are used for LE, too 322 free_slots_classic -= num_packets_sent_le; 323 if (free_slots_classic < 0){ 324 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); 325 return 0; 326 } 327 } 328 329 switch (address_type){ 330 case BD_ADDR_TYPE_UNKNOWN: 331 log_error("hci_number_free_acl_slots: unknown address type"); 332 return 0; 333 334 case BD_ADDR_TYPE_CLASSIC: 335 return free_slots_classic; 336 337 default: 338 if (hci_stack->le_acl_packets_total_num){ 339 return free_slots_le; 340 } 341 return free_slots_classic; 342 } 343 } 344 345 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 346 // get connection type 347 hci_connection_t * connection = hci_connection_for_handle(con_handle); 348 if (!connection){ 349 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 350 return 0; 351 } 352 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 353 } 354 355 static int hci_number_free_sco_slots(void){ 356 int num_sco_packets_sent = 0; 357 btstack_linked_item_t *it; 358 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 359 hci_connection_t * connection = (hci_connection_t *) it; 360 num_sco_packets_sent += connection->num_sco_packets_sent; 361 } 362 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 363 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 364 return 0; 365 } 366 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 367 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 368 } 369 370 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 371 int hci_can_send_command_packet_now(void){ 372 if (hci_stack->hci_packet_buffer_reserved) return 0; 373 374 // check for async hci transport implementations 375 if (hci_stack->hci_transport->can_send_packet_now){ 376 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 377 return 0; 378 } 379 } 380 381 return hci_stack->num_cmd_packets > 0; 382 } 383 384 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 385 // check for async hci transport implementations 386 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 387 return hci_stack->hci_transport->can_send_packet_now(packet_type); 388 } 389 390 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 391 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 392 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 393 } 394 395 int hci_can_send_acl_classic_packet_now(void){ 396 if (hci_stack->hci_packet_buffer_reserved) return 0; 397 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 398 } 399 400 int hci_can_send_acl_le_packet_now(void){ 401 if (hci_stack->hci_packet_buffer_reserved) return 0; 402 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 403 } 404 405 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 406 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 407 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 408 } 409 410 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 411 if (hci_stack->hci_packet_buffer_reserved) return 0; 412 return hci_can_send_prepared_acl_packet_now(con_handle); 413 } 414 415 int hci_can_send_prepared_sco_packet_now(void){ 416 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 417 if (!hci_stack->synchronous_flow_control_enabled) return 1; 418 return hci_number_free_sco_slots() > 0; 419 } 420 421 int hci_can_send_sco_packet_now(void){ 422 if (hci_stack->hci_packet_buffer_reserved) return 0; 423 return hci_can_send_prepared_sco_packet_now(); 424 } 425 426 void hci_request_sco_can_send_now_event(void){ 427 hci_stack->sco_waiting_for_can_send_now = 1; 428 hci_notify_if_sco_can_send_now(); 429 } 430 431 // used for internal checks in l2cap.c 432 int hci_is_packet_buffer_reserved(void){ 433 return hci_stack->hci_packet_buffer_reserved; 434 } 435 436 // reserves outgoing packet buffer. @returns 1 if successful 437 int hci_reserve_packet_buffer(void){ 438 if (hci_stack->hci_packet_buffer_reserved) { 439 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 440 return 0; 441 } 442 hci_stack->hci_packet_buffer_reserved = 1; 443 return 1; 444 } 445 446 void hci_release_packet_buffer(void){ 447 hci_stack->hci_packet_buffer_reserved = 0; 448 } 449 450 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 451 static int hci_transport_synchronous(void){ 452 return hci_stack->hci_transport->can_send_packet_now == NULL; 453 } 454 455 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 456 457 // 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); 458 459 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 460 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 461 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 462 max_acl_data_packet_length = hci_stack->le_data_packets_length; 463 } 464 465 // testing: reduce buffer to minimum 466 // max_acl_data_packet_length = 52; 467 468 log_debug("hci_send_acl_packet_fragments entered"); 469 470 int err; 471 // multiple packets could be send on a synchronous HCI transport 472 while (1){ 473 474 log_debug("hci_send_acl_packet_fragments loop entered"); 475 476 // get current data 477 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 478 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 479 int more_fragments = 0; 480 481 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 482 if (current_acl_data_packet_length > max_acl_data_packet_length){ 483 more_fragments = 1; 484 current_acl_data_packet_length = max_acl_data_packet_length; 485 } 486 487 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 488 if (acl_header_pos > 0){ 489 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 490 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 491 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 492 } 493 494 // update header len 495 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 496 497 // count packet 498 connection->num_acl_packets_sent++; 499 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %u)", more_fragments); 500 501 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 502 if (more_fragments){ 503 // update start of next fragment to send 504 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 505 } else { 506 // done 507 hci_stack->acl_fragmentation_pos = 0; 508 hci_stack->acl_fragmentation_total_size = 0; 509 } 510 511 // send packet 512 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 513 const int size = current_acl_data_packet_length + 4; 514 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 515 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 516 517 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %u)", more_fragments); 518 519 // done yet? 520 if (!more_fragments) break; 521 522 // can send more? 523 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 524 } 525 526 log_debug("hci_send_acl_packet_fragments loop over"); 527 528 // release buffer now for synchronous transport 529 if (hci_transport_synchronous()){ 530 hci_release_packet_buffer(); 531 // notify upper stack that it might be possible to send again 532 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 533 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 534 } 535 536 return err; 537 } 538 539 // pre: caller has reserved the packet buffer 540 int hci_send_acl_packet_buffer(int size){ 541 542 // log_info("hci_send_acl_packet_buffer size %u", size); 543 544 if (!hci_stack->hci_packet_buffer_reserved) { 545 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 546 return 0; 547 } 548 549 uint8_t * packet = hci_stack->hci_packet_buffer; 550 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 551 552 // check for free places on Bluetooth module 553 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 554 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 555 hci_release_packet_buffer(); 556 return BTSTACK_ACL_BUFFERS_FULL; 557 } 558 559 hci_connection_t *connection = hci_connection_for_handle( con_handle); 560 if (!connection) { 561 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 562 hci_release_packet_buffer(); 563 return 0; 564 } 565 hci_connection_timestamp(connection); 566 567 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 568 569 // setup data 570 hci_stack->acl_fragmentation_total_size = size; 571 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 572 573 return hci_send_acl_packet_fragments(connection); 574 } 575 576 // pre: caller has reserved the packet buffer 577 int hci_send_sco_packet_buffer(int size){ 578 579 // log_info("hci_send_acl_packet_buffer size %u", size); 580 581 if (!hci_stack->hci_packet_buffer_reserved) { 582 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 583 return 0; 584 } 585 586 uint8_t * packet = hci_stack->hci_packet_buffer; 587 588 // skip checks in loopback mode 589 if (!hci_stack->loopback_mode){ 590 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 591 592 // check for free places on Bluetooth module 593 if (!hci_can_send_prepared_sco_packet_now()) { 594 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 595 hci_release_packet_buffer(); 596 return BTSTACK_ACL_BUFFERS_FULL; 597 } 598 599 // track send packet in connection struct 600 hci_connection_t *connection = hci_connection_for_handle( con_handle); 601 if (!connection) { 602 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 603 hci_release_packet_buffer(); 604 return 0; 605 } 606 connection->num_sco_packets_sent++; 607 } 608 609 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 610 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 611 612 if (hci_transport_synchronous()){ 613 hci_release_packet_buffer(); 614 // notify upper stack that it might be possible to send again 615 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 616 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 617 } 618 619 return err; 620 } 621 622 static void acl_handler(uint8_t *packet, int size){ 623 624 // log_info("acl_handler: size %u", size); 625 626 // get info 627 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 628 hci_connection_t *conn = hci_connection_for_handle(con_handle); 629 uint8_t acl_flags = READ_ACL_FLAGS(packet); 630 uint16_t acl_length = READ_ACL_LENGTH(packet); 631 632 // ignore non-registered handle 633 if (!conn){ 634 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 635 return; 636 } 637 638 // assert packet is complete 639 if (acl_length + 4 != size){ 640 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 641 return; 642 } 643 644 // update idle timestamp 645 hci_connection_timestamp(conn); 646 647 // handle different packet types 648 switch (acl_flags & 0x03) { 649 650 case 0x01: // continuation fragment 651 652 // sanity checks 653 if (conn->acl_recombination_pos == 0) { 654 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 655 return; 656 } 657 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 658 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 659 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 660 conn->acl_recombination_pos = 0; 661 return; 662 } 663 664 // append fragment payload (header already stored) 665 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 666 conn->acl_recombination_pos += acl_length; 667 668 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 669 // conn->acl_recombination_pos, conn->acl_recombination_length); 670 671 // forward complete L2CAP packet if complete. 672 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 673 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 674 // reset recombination buffer 675 conn->acl_recombination_length = 0; 676 conn->acl_recombination_pos = 0; 677 } 678 break; 679 680 case 0x02: { // first fragment 681 682 // sanity check 683 if (conn->acl_recombination_pos) { 684 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 685 conn->acl_recombination_pos = 0; 686 } 687 688 // peek into L2CAP packet! 689 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 690 691 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 692 693 // compare fragment size to L2CAP packet size 694 if (acl_length >= l2cap_length + 4){ 695 // forward fragment as L2CAP packet 696 hci_emit_acl_packet(packet, acl_length + 4); 697 } else { 698 699 if (acl_length > HCI_ACL_BUFFER_SIZE){ 700 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 701 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 702 return; 703 } 704 705 // store first fragment and tweak acl length for complete package 706 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 707 conn->acl_recombination_pos = acl_length + 4; 708 conn->acl_recombination_length = l2cap_length; 709 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 710 } 711 break; 712 713 } 714 default: 715 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 716 return; 717 } 718 719 // execute main loop 720 hci_run(); 721 } 722 723 static void hci_shutdown_connection(hci_connection_t *conn){ 724 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 725 726 btstack_run_loop_remove_timer(&conn->timeout); 727 728 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 729 btstack_memory_hci_connection_free( conn ); 730 731 // now it's gone 732 hci_emit_nr_connections_changed(); 733 } 734 735 static const uint16_t packet_type_sizes[] = { 736 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 737 HCI_ACL_DH1_SIZE, 0, 0, 0, 738 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 739 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 740 }; 741 static const uint8_t packet_type_feature_requirement_bit[] = { 742 0, // 3 slot packets 743 1, // 5 slot packets 744 25, // EDR 2 mpbs 745 26, // EDR 3 mbps 746 39, // 3 slot EDR packts 747 40, // 5 slot EDR packet 748 }; 749 static const uint16_t packet_type_feature_packet_mask[] = { 750 0x0f00, // 3 slot packets 751 0xf000, // 5 slot packets 752 0x1102, // EDR 2 mpbs 753 0x2204, // EDR 3 mbps 754 0x0300, // 3 slot EDR packts 755 0x3000, // 5 slot EDR packet 756 }; 757 758 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 759 // enable packet types based on size 760 uint16_t packet_types = 0; 761 unsigned int i; 762 for (i=0;i<16;i++){ 763 if (packet_type_sizes[i] == 0) continue; 764 if (packet_type_sizes[i] <= buffer_size){ 765 packet_types |= 1 << i; 766 } 767 } 768 // disable packet types due to missing local supported features 769 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 770 int bit_idx = packet_type_feature_requirement_bit[i]; 771 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 772 if (feature_set) continue; 773 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 774 packet_types &= ~packet_type_feature_packet_mask[i]; 775 } 776 // flip bits for "may not be used" 777 packet_types ^= 0x3306; 778 return packet_types; 779 } 780 781 uint16_t hci_usable_acl_packet_types(void){ 782 return hci_stack->packet_types; 783 } 784 785 uint8_t* hci_get_outgoing_packet_buffer(void){ 786 // hci packet buffer is >= acl data packet length 787 return hci_stack->hci_packet_buffer; 788 } 789 790 uint16_t hci_max_acl_data_packet_length(void){ 791 return hci_stack->acl_data_packet_length; 792 } 793 794 int hci_non_flushable_packet_boundary_flag_supported(void){ 795 // No. 54, byte 6, bit 6 796 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 797 } 798 799 static int gap_ssp_supported(void){ 800 // No. 51, byte 6, bit 3 801 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 802 } 803 804 static int hci_classic_supported(void){ 805 // No. 37, byte 4, bit 5, = No BR/EDR Support 806 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 807 } 808 809 static int hci_le_supported(void){ 810 #ifdef ENABLE_BLE 811 // No. 37, byte 4, bit 6 = LE Supported (Controller) 812 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 813 #else 814 return 0; 815 #endif 816 } 817 818 // get addr type and address used in advertisement packets 819 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 820 *addr_type = hci_stack->adv_addr_type; 821 if (hci_stack->adv_addr_type){ 822 memcpy(addr, hci_stack->adv_address, 6); 823 } else { 824 memcpy(addr, hci_stack->local_bd_addr, 6); 825 } 826 } 827 828 #ifdef ENABLE_BLE 829 void le_handle_advertisement_report(uint8_t *packet, int size){ 830 int offset = 3; 831 int num_reports = packet[offset]; 832 offset += 1; 833 834 int i; 835 // log_info("HCI: handle adv report with num reports: %d", num_reports); 836 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 837 for (i=0; i<num_reports;i++){ 838 uint8_t data_length = packet[offset + 8]; 839 uint8_t event_size = 10 + data_length; 840 int pos = 0; 841 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 842 event[pos++] = event_size; 843 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 844 offset += 8; 845 pos += 8; 846 event[pos++] = packet[offset + 1 + data_length]; // rssi 847 event[pos++] = packet[offset++]; //data_length; 848 memcpy(&event[pos], &packet[offset], data_length); 849 pos += data_length; 850 offset += data_length + 1; // rssi 851 hci_emit_event(event, pos, 1); 852 } 853 } 854 #endif 855 856 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 857 if (!hci_stack->config) return 0; 858 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 859 // Limit baud rate for Broadcom chipsets to 3 mbps 860 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 861 baud_rate = 3000000; 862 } 863 return baud_rate; 864 } 865 866 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 867 switch (hci_stack->substate){ 868 case HCI_INIT_W4_SEND_RESET: 869 log_info("Resend HCI Reset"); 870 hci_stack->substate = HCI_INIT_SEND_RESET; 871 hci_stack->num_cmd_packets = 1; 872 hci_run(); 873 break; 874 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 875 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 876 if (hci_stack->hci_transport->reset_link){ 877 hci_stack->hci_transport->reset_link(); 878 } 879 // NOTE: explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 880 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 881 log_info("Resend HCI Reset - CSR Warm Boot"); 882 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 883 hci_stack->num_cmd_packets = 1; 884 hci_run(); 885 break; 886 case HCI_INIT_W4_SEND_BAUD_CHANGE: { 887 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 888 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 889 hci_stack->hci_transport->set_baudrate(baud_rate); 890 // For CSR, HCI Reset is sent on new baud rate 891 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 892 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 893 hci_run(); 894 } 895 break; 896 } 897 default: 898 break; 899 } 900 } 901 902 static void hci_initializing_next_state(void){ 903 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 904 } 905 906 // assumption: hci_can_send_command_packet_now() == true 907 static void hci_initializing_run(void){ 908 log_info("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 909 switch (hci_stack->substate){ 910 case HCI_INIT_SEND_RESET: 911 hci_state_reset(); 912 913 #ifndef HAVE_PLATFORM_IPHONE_OS 914 // prepare reset if command complete not received in 100ms 915 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 916 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 917 btstack_run_loop_add_timer(&hci_stack->timeout); 918 #endif 919 // send command 920 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 921 hci_send_cmd(&hci_reset); 922 break; 923 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 924 hci_send_cmd(&hci_read_local_version_information); 925 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 926 break; 927 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 928 hci_state_reset(); 929 // prepare reset if command complete not received in 100ms 930 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 931 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 932 btstack_run_loop_add_timer(&hci_stack->timeout); 933 // send command 934 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 935 hci_send_cmd(&hci_reset); 936 break; 937 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 938 hci_state_reset(); 939 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 940 hci_send_cmd(&hci_reset); 941 break; 942 case HCI_INIT_SEND_BAUD_CHANGE: { 943 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 944 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 945 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 946 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 947 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 948 // STLC25000D: baudrate change happens within 0.5 s after command was send, 949 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 950 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 951 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 952 btstack_run_loop_add_timer(&hci_stack->timeout); 953 } 954 break; 955 } 956 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 957 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 958 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 959 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 960 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 961 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 962 break; 963 } 964 case HCI_INIT_CUSTOM_INIT: 965 log_info("Custom init"); 966 // Custom initialization 967 if (hci_stack->chipset && hci_stack->chipset->next_command){ 968 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 969 if (valid_cmd){ 970 int size = 3 + hci_stack->hci_packet_buffer[2]; 971 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 972 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 973 switch (valid_cmd) { 974 case 1: 975 default: 976 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 977 break; 978 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 979 log_info("CSR Warm Boot"); 980 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 981 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 982 btstack_run_loop_add_timer(&hci_stack->timeout); 983 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 984 && hci_stack->config 985 && hci_stack->chipset 986 // && hci_stack->chipset->set_baudrate_command -- there's no such command 987 && hci_stack->hci_transport->set_baudrate 988 && hci_transport_uart_get_main_baud_rate()){ 989 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 990 } else { 991 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 992 } 993 break; 994 } 995 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 996 break; 997 } 998 log_info("hci_run: init script done"); 999 1000 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1001 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1002 int need_baud_change = hci_stack->config 1003 && hci_stack->chipset 1004 && hci_stack->chipset->set_baudrate_command 1005 && hci_stack->hci_transport->set_baudrate 1006 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1007 if (need_baud_change) { 1008 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1009 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1010 hci_stack->hci_transport->set_baudrate(baud_rate); 1011 } 1012 } 1013 } 1014 // otherwise continue 1015 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1016 hci_send_cmd(&hci_read_local_supported_commands); 1017 break; 1018 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1019 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1020 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1021 hci_send_cmd(&hci_read_local_supported_commands); 1022 break; 1023 case HCI_INIT_SET_BD_ADDR: 1024 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1025 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1026 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1027 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1028 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1029 break; 1030 case HCI_INIT_READ_BD_ADDR: 1031 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1032 hci_send_cmd(&hci_read_bd_addr); 1033 break; 1034 case HCI_INIT_READ_BUFFER_SIZE: 1035 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1036 hci_send_cmd(&hci_read_buffer_size); 1037 break; 1038 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1039 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1040 hci_send_cmd(&hci_read_local_supported_features); 1041 break; 1042 case HCI_INIT_SET_EVENT_MASK: 1043 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1044 if (hci_le_supported()){ 1045 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1046 } else { 1047 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1048 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1049 } 1050 break; 1051 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1052 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1053 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1054 break; 1055 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1056 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1057 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1058 break; 1059 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1060 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1061 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1062 break; 1063 case HCI_INIT_WRITE_LOCAL_NAME: 1064 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1065 if (hci_stack->local_name){ 1066 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1067 } else { 1068 char local_name[30]; 1069 // BTstack-11:22:33:44:55:66 1070 strcpy(local_name, "BTstack "); 1071 strcat(local_name, bd_addr_to_str(hci_stack->local_bd_addr)); 1072 log_info("---> Name %s", local_name); 1073 hci_send_cmd(&hci_write_local_name, local_name); 1074 } 1075 break; 1076 case HCI_INIT_WRITE_SCAN_ENABLE: 1077 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1078 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1079 break; 1080 // only sent if ENABLE_SCO_OVER_HCI is defined 1081 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1082 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1083 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1084 break; 1085 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1086 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1087 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1088 break; 1089 #ifdef ENABLE_BLE 1090 // LE INIT 1091 case HCI_INIT_LE_READ_BUFFER_SIZE: 1092 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1093 hci_send_cmd(&hci_le_read_buffer_size); 1094 break; 1095 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1096 // LE Supported Host = 1, Simultaneous Host = 0 1097 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1098 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1099 break; 1100 case HCI_INIT_READ_WHITE_LIST_SIZE: 1101 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1102 hci_send_cmd(&hci_le_read_white_list_size); 1103 break; 1104 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1105 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1106 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1107 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1108 break; 1109 #endif 1110 default: 1111 return; 1112 } 1113 } 1114 1115 static void hci_init_done(void){ 1116 // done. tell the app 1117 log_info("hci_init_done -> HCI_STATE_WORKING"); 1118 hci_stack->state = HCI_STATE_WORKING; 1119 hci_emit_state(); 1120 hci_run(); 1121 } 1122 1123 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1124 uint8_t command_completed = 0; 1125 1126 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1127 uint16_t opcode = little_endian_read_16(packet,3); 1128 if (opcode == hci_stack->last_cmd_opcode){ 1129 command_completed = 1; 1130 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1131 } else { 1132 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1133 } 1134 } 1135 1136 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1137 uint8_t status = packet[2]; 1138 uint16_t opcode = little_endian_read_16(packet,4); 1139 if (opcode == hci_stack->last_cmd_opcode){ 1140 if (status){ 1141 command_completed = 1; 1142 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1143 } else { 1144 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1145 } 1146 } else { 1147 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1148 } 1149 } 1150 1151 // Vendor == CSR 1152 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1153 // TODO: track actual command 1154 command_completed = 1; 1155 } 1156 1157 // Vendor == Toshiba 1158 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1159 // TODO: track actual command 1160 command_completed = 1; 1161 } 1162 1163 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1164 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1165 // 1166 // HCI Reset 1167 // Timeout 100 ms 1168 // HCI Reset 1169 // Command Complete Reset 1170 // HCI Read Local Version Information 1171 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1172 // hang... 1173 // 1174 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1175 if (!command_completed 1176 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1177 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1178 1179 uint16_t opcode = little_endian_read_16(packet,3); 1180 if (opcode == hci_reset.opcode){ 1181 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1182 return; 1183 } 1184 } 1185 1186 // CSR & H5 1187 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1188 if (!command_completed 1189 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1190 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1191 1192 uint16_t opcode = little_endian_read_16(packet,3); 1193 if (opcode == hci_reset.opcode){ 1194 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1195 return; 1196 } 1197 } 1198 1199 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1200 // fix: Correct substate and behave as command below 1201 if (command_completed){ 1202 switch (hci_stack->substate){ 1203 case HCI_INIT_SEND_RESET: 1204 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1205 break; 1206 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1207 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1208 break; 1209 default: 1210 break; 1211 } 1212 } 1213 1214 1215 if (!command_completed) return; 1216 1217 int need_baud_change = hci_stack->config 1218 && hci_stack->chipset 1219 && hci_stack->chipset->set_baudrate_command 1220 && hci_stack->hci_transport->set_baudrate 1221 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1222 1223 int need_addr_change = hci_stack->custom_bd_addr_set 1224 && hci_stack->chipset 1225 && hci_stack->chipset->set_bd_addr_command; 1226 1227 switch(hci_stack->substate){ 1228 case HCI_INIT_SEND_RESET: 1229 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1230 // fix: just correct substate and behave as command below 1231 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1232 btstack_run_loop_remove_timer(&hci_stack->timeout); 1233 break; 1234 case HCI_INIT_W4_SEND_RESET: 1235 btstack_run_loop_remove_timer(&hci_stack->timeout); 1236 break; 1237 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1238 log_info("Received local version info, need baud change %u", need_baud_change); 1239 if (need_baud_change){ 1240 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1241 return; 1242 } 1243 // skip baud change 1244 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1245 return; 1246 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1247 // for STLC2500D, baud rate change already happened. 1248 // for others, baud rate gets changed now 1249 if (hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS){ 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1252 hci_stack->hci_transport->set_baudrate(baud_rate); 1253 } 1254 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1255 return; 1256 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1257 btstack_run_loop_remove_timer(&hci_stack->timeout); 1258 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1259 return; 1260 case HCI_INIT_W4_CUSTOM_INIT: 1261 // repeat custom init 1262 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1263 return; 1264 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1265 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1266 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1267 return; 1268 } 1269 if (need_addr_change){ 1270 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1271 return; 1272 } 1273 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1274 return; 1275 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: { 1276 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1277 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1278 hci_stack->hci_transport->set_baudrate(baud_rate); 1279 if (need_addr_change){ 1280 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1281 return; 1282 } 1283 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1284 return; 1285 } 1286 case HCI_INIT_W4_SET_BD_ADDR: 1287 // for STLC2500D, bd addr change only gets active after sending reset command 1288 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1289 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1290 return; 1291 } 1292 // skipping st warm boot 1293 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1294 return; 1295 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1296 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1297 return; 1298 case HCI_INIT_W4_READ_BD_ADDR: 1299 // only read buffer size if supported 1300 if (hci_stack->local_supported_commands[0] & 0x01) { 1301 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1302 return; 1303 } 1304 // skipping read buffer size 1305 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1306 return; 1307 case HCI_INIT_W4_SET_EVENT_MASK: 1308 // skip Classic init commands for LE only chipsets 1309 if (!hci_classic_supported()){ 1310 if (hci_le_supported()){ 1311 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1312 return; 1313 } else { 1314 log_error("Neither BR/EDR nor LE supported"); 1315 hci_init_done(); 1316 return; 1317 } 1318 } 1319 if (!gap_ssp_supported()){ 1320 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1321 return; 1322 } 1323 break; 1324 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1325 break; 1326 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1327 // skip write le host if not supported (e.g. on LE only EM9301) 1328 if (hci_stack->local_supported_commands[0] & 0x02) break; 1329 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1330 return; 1331 1332 #ifdef ENABLE_SCO_OVER_HCI 1333 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1334 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1335 break; 1336 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1337 if (!hci_le_supported()){ 1338 // SKIP LE init for Classic only configuration 1339 hci_init_done(); 1340 return; 1341 } 1342 break; 1343 #else 1344 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1345 if (!hci_le_supported()){ 1346 // SKIP LE init for Classic only configuration 1347 hci_init_done(); 1348 return; 1349 } 1350 #endif 1351 break; 1352 // Response to command before init done state -> init done 1353 case (HCI_INIT_DONE-1): 1354 hci_init_done(); 1355 return; 1356 1357 default: 1358 break; 1359 } 1360 hci_initializing_next_state(); 1361 } 1362 1363 static void event_handler(uint8_t *packet, int size){ 1364 1365 uint16_t event_length = packet[1]; 1366 1367 // assert packet is complete 1368 if (size != event_length + 2){ 1369 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1370 return; 1371 } 1372 1373 bd_addr_t addr; 1374 bd_addr_type_t addr_type; 1375 uint8_t link_type; 1376 hci_con_handle_t handle; 1377 hci_connection_t * conn; 1378 int i; 1379 1380 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1381 1382 switch (hci_event_packet_get_type(packet)) { 1383 1384 case HCI_EVENT_COMMAND_COMPLETE: 1385 // get num cmd packets 1386 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1387 hci_stack->num_cmd_packets = packet[2]; 1388 1389 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1390 // from offset 5 1391 // status 1392 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1393 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1394 hci_stack->sco_data_packet_length = packet[8]; 1395 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1396 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1397 1398 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1399 // determine usable ACL payload size 1400 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1401 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1402 } 1403 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1404 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1405 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1406 } 1407 } 1408 #ifdef ENABLE_BLE 1409 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1410 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1411 hci_stack->le_acl_packets_total_num = packet[8]; 1412 // determine usable ACL payload size 1413 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1414 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1415 } 1416 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1417 } 1418 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1419 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1420 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1421 } 1422 #endif 1423 // Dump local address 1424 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1425 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1426 hci_stack->local_bd_addr); 1427 log_info("Local Address, Status: 0x%02x: Addr: %s", 1428 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1429 if (hci_stack->link_key_db){ 1430 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1431 } 1432 } 1433 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1434 hci_emit_discoverable_enabled(hci_stack->discoverable); 1435 } 1436 // Note: HCI init checks 1437 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1438 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1439 1440 // determine usable ACL packet types based on host buffer size and supported features 1441 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1442 log_info("packet types %04x", hci_stack->packet_types); 1443 1444 // Classic/LE 1445 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1446 } 1447 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1448 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1449 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1450 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1451 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1452 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1453 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1454 // notify app 1455 if (hci_stack->local_version_information_callback){ 1456 hci_stack->local_version_information_callback(packet); 1457 } 1458 } 1459 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1460 hci_stack->local_supported_commands[0] = 1461 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1462 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1463 } 1464 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1465 if (packet[5] == 0){ 1466 hci_stack->synchronous_flow_control_enabled = 1; 1467 } 1468 } 1469 break; 1470 1471 case HCI_EVENT_COMMAND_STATUS: 1472 // get num cmd packets 1473 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1474 hci_stack->num_cmd_packets = packet[3]; 1475 break; 1476 1477 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1478 int offset = 3; 1479 for (i=0; i<packet[2];i++){ 1480 handle = little_endian_read_16(packet, offset); 1481 offset += 2; 1482 uint16_t num_packets = little_endian_read_16(packet, offset); 1483 offset += 2; 1484 1485 conn = hci_connection_for_handle(handle); 1486 if (!conn){ 1487 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1488 continue; 1489 } 1490 1491 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1492 if (conn->num_sco_packets_sent >= num_packets){ 1493 conn->num_sco_packets_sent -= num_packets; 1494 } else { 1495 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1496 conn->num_sco_packets_sent = 0; 1497 } 1498 hci_notify_if_sco_can_send_now(); 1499 } else { 1500 if (conn->num_acl_packets_sent >= num_packets){ 1501 conn->num_acl_packets_sent -= num_packets; 1502 } else { 1503 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1504 conn->num_acl_packets_sent = 0; 1505 } 1506 } 1507 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1508 } 1509 break; 1510 } 1511 case HCI_EVENT_CONNECTION_REQUEST: 1512 reverse_bd_addr(&packet[2], addr); 1513 // TODO: eval COD 8-10 1514 link_type = packet[11]; 1515 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1516 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1517 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1518 if (!conn) { 1519 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1520 } 1521 if (!conn) { 1522 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1523 hci_stack->decline_reason = 0x0d; 1524 bd_addr_copy(hci_stack->decline_addr, addr); 1525 break; 1526 } 1527 conn->role = HCI_ROLE_SLAVE; 1528 conn->state = RECEIVED_CONNECTION_REQUEST; 1529 // store info about eSCO 1530 if (link_type == 0x02){ 1531 conn->remote_supported_feature_eSCO = 1; 1532 } 1533 hci_run(); 1534 break; 1535 1536 case HCI_EVENT_CONNECTION_COMPLETE: 1537 // Connection management 1538 reverse_bd_addr(&packet[5], addr); 1539 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1540 addr_type = BD_ADDR_TYPE_CLASSIC; 1541 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1542 if (conn) { 1543 if (!packet[2]){ 1544 conn->state = OPEN; 1545 conn->con_handle = little_endian_read_16(packet, 3); 1546 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1547 1548 // restart timer 1549 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1550 btstack_run_loop_add_timer(&conn->timeout); 1551 1552 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1553 1554 hci_emit_nr_connections_changed(); 1555 } else { 1556 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1557 uint8_t status = packet[2]; 1558 bd_addr_t bd_address; 1559 memcpy(&bd_address, conn->address, 6); 1560 1561 // connection failed, remove entry 1562 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1563 btstack_memory_hci_connection_free( conn ); 1564 1565 // notify client if dedicated bonding 1566 if (notify_dedicated_bonding_failed){ 1567 log_info("hci notify_dedicated_bonding_failed"); 1568 hci_emit_dedicated_bonding_result(bd_address, status); 1569 } 1570 1571 // if authentication error, also delete link key 1572 if (packet[2] == 0x05) { 1573 gap_drop_link_key_for_bd_addr(addr); 1574 } 1575 } 1576 } 1577 break; 1578 1579 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1580 reverse_bd_addr(&packet[5], addr); 1581 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1582 if (packet[2]){ 1583 // connection failed 1584 break; 1585 } 1586 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1587 if (!conn) { 1588 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1589 } 1590 if (!conn) { 1591 break; 1592 } 1593 conn->state = OPEN; 1594 conn->con_handle = little_endian_read_16(packet, 3); 1595 break; 1596 1597 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1598 handle = little_endian_read_16(packet, 3); 1599 conn = hci_connection_for_handle(handle); 1600 if (!conn) break; 1601 if (!packet[2]){ 1602 uint8_t * features = &packet[5]; 1603 if (features[6] & (1 << 3)){ 1604 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1605 } 1606 if (features[3] & (1<<7)){ 1607 conn->remote_supported_feature_eSCO = 1; 1608 } 1609 } 1610 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1611 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1612 if (conn->bonding_flags & BONDING_DEDICATED){ 1613 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1614 } 1615 break; 1616 1617 case HCI_EVENT_LINK_KEY_REQUEST: 1618 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1619 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1620 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1621 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1622 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1623 hci_run(); 1624 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1625 return; 1626 1627 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1628 reverse_bd_addr(&packet[2], addr); 1629 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1630 if (!conn) break; 1631 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1632 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1633 // Change Connection Encryption keeps link key type 1634 if (link_key_type != CHANGED_COMBINATION_KEY){ 1635 conn->link_key_type = link_key_type; 1636 } 1637 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1638 // still forward event to allow dismiss of pairing dialog 1639 break; 1640 } 1641 1642 case HCI_EVENT_PIN_CODE_REQUEST: 1643 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1644 // non-bondable mode: pin code negative reply will be sent 1645 if (!hci_stack->bondable){ 1646 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1647 hci_run(); 1648 return; 1649 } 1650 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1651 if (!hci_stack->link_key_db) break; 1652 hci_event_pin_code_request_get_bd_addr(packet, addr); 1653 hci_stack->link_key_db->delete_link_key(addr); 1654 break; 1655 1656 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1657 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1658 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1659 break; 1660 1661 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1662 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1663 if (!hci_stack->ssp_auto_accept) break; 1664 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1665 break; 1666 1667 case HCI_EVENT_USER_PASSKEY_REQUEST: 1668 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1669 if (!hci_stack->ssp_auto_accept) break; 1670 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1671 break; 1672 1673 case HCI_EVENT_ENCRYPTION_CHANGE: 1674 handle = little_endian_read_16(packet, 3); 1675 conn = hci_connection_for_handle(handle); 1676 if (!conn) break; 1677 if (packet[2] == 0) { 1678 if (packet[5]){ 1679 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1680 } else { 1681 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1682 } 1683 } 1684 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1685 break; 1686 1687 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1688 handle = little_endian_read_16(packet, 3); 1689 conn = hci_connection_for_handle(handle); 1690 if (!conn) break; 1691 1692 // dedicated bonding: send result and disconnect 1693 if (conn->bonding_flags & BONDING_DEDICATED){ 1694 conn->bonding_flags &= ~BONDING_DEDICATED; 1695 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1696 conn->bonding_status = packet[2]; 1697 break; 1698 } 1699 1700 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1701 // link key sufficient for requested security 1702 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1703 break; 1704 } 1705 // not enough 1706 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1707 break; 1708 1709 // HCI_EVENT_DISCONNECTION_COMPLETE 1710 // has been split, to first notify stack before shutting connection down 1711 // see end of function, too. 1712 case HCI_EVENT_DISCONNECTION_COMPLETE: 1713 if (packet[2]) break; // status != 0 1714 handle = little_endian_read_16(packet, 3); 1715 conn = hci_connection_for_handle(handle); 1716 if (!conn) break; // no conn struct anymore 1717 // re-enable advertisements for le connections if active 1718 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1719 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1720 } 1721 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1722 break; 1723 1724 case HCI_EVENT_HARDWARE_ERROR: 1725 if (hci_stack->hardware_error_callback){ 1726 (*hci_stack->hardware_error_callback)(); 1727 } else { 1728 // if no special requests, just reboot stack 1729 hci_power_control_off(); 1730 hci_power_control_on(); 1731 } 1732 break; 1733 1734 case HCI_EVENT_ROLE_CHANGE: 1735 if (packet[2]) break; // status != 0 1736 handle = little_endian_read_16(packet, 3); 1737 conn = hci_connection_for_handle(handle); 1738 if (!conn) break; // no conn 1739 conn->role = packet[9]; 1740 break; 1741 1742 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1743 // release packet buffer only for asynchronous transport and if there are not further fragements 1744 if (hci_transport_synchronous()) { 1745 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1746 return; // instead of break: to avoid re-entering hci_run() 1747 } 1748 if (hci_stack->acl_fragmentation_total_size) break; 1749 hci_release_packet_buffer(); 1750 1751 // L2CAP receives this event via the hci_emit_event below 1752 1753 // For SCO, we do the can_send_now_check here 1754 hci_notify_if_sco_can_send_now(); 1755 break; 1756 1757 case HCI_EVENT_SCO_CAN_SEND_NOW: 1758 // For SCO, we do the can_send_now_check here 1759 hci_notify_if_sco_can_send_now(); 1760 return; 1761 1762 #ifdef ENABLE_BLE 1763 case HCI_EVENT_LE_META: 1764 switch (packet[2]){ 1765 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1766 // log_info("advertising report received"); 1767 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1768 le_handle_advertisement_report(packet, size); 1769 break; 1770 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1771 // Connection management 1772 reverse_bd_addr(&packet[8], addr); 1773 addr_type = (bd_addr_type_t)packet[7]; 1774 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1775 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1776 // if auto-connect, remove from whitelist in both roles 1777 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1778 hci_remove_from_whitelist(addr_type, addr); 1779 } 1780 // handle error: error is reported only to the initiator -> outgoing connection 1781 if (packet[3]){ 1782 // outgoing connection establishment is done 1783 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1784 // remove entry 1785 if (conn){ 1786 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1787 btstack_memory_hci_connection_free( conn ); 1788 } 1789 break; 1790 } 1791 // on success, both hosts receive connection complete event 1792 if (packet[6] == HCI_ROLE_MASTER){ 1793 // if we're master, it was an outgoing connection and we're done with it 1794 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1795 } else { 1796 // if we're slave, it was an incoming connection, advertisements have stopped 1797 hci_stack->le_advertisements_active = 0; 1798 } 1799 // LE connections are auto-accepted, so just create a connection if there isn't one already 1800 if (!conn){ 1801 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1802 } 1803 // no memory, sorry. 1804 if (!conn){ 1805 break; 1806 } 1807 1808 conn->state = OPEN; 1809 conn->role = packet[6]; 1810 conn->con_handle = little_endian_read_16(packet, 4); 1811 1812 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1813 1814 // restart timer 1815 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1816 // btstack_run_loop_add_timer(&conn->timeout); 1817 1818 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1819 1820 hci_emit_nr_connections_changed(); 1821 break; 1822 1823 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1824 1825 default: 1826 break; 1827 } 1828 break; 1829 #endif 1830 default: 1831 break; 1832 } 1833 1834 // handle BT initialization 1835 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1836 hci_initializing_event_handler(packet, size); 1837 } 1838 1839 // help with BT sleep 1840 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1841 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1842 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1843 hci_initializing_next_state(); 1844 } 1845 1846 // notify upper stack 1847 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1848 1849 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1850 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1851 if (!packet[2]){ 1852 handle = little_endian_read_16(packet, 3); 1853 hci_connection_t * aConn = hci_connection_for_handle(handle); 1854 if (aConn) { 1855 uint8_t status = aConn->bonding_status; 1856 uint16_t flags = aConn->bonding_flags; 1857 bd_addr_t bd_address; 1858 memcpy(&bd_address, aConn->address, 6); 1859 hci_shutdown_connection(aConn); 1860 // connection struct is gone, don't access anymore 1861 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1862 hci_emit_dedicated_bonding_result(bd_address, status); 1863 } 1864 } 1865 } 1866 } 1867 1868 // execute main loop 1869 hci_run(); 1870 } 1871 1872 static void sco_handler(uint8_t * packet, uint16_t size){ 1873 if (!hci_stack->sco_packet_handler) return; 1874 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1875 } 1876 1877 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1878 hci_dump_packet(packet_type, 1, packet, size); 1879 switch (packet_type) { 1880 case HCI_EVENT_PACKET: 1881 event_handler(packet, size); 1882 break; 1883 case HCI_ACL_DATA_PACKET: 1884 acl_handler(packet, size); 1885 break; 1886 case HCI_SCO_DATA_PACKET: 1887 sco_handler(packet, size); 1888 default: 1889 break; 1890 } 1891 } 1892 1893 /** 1894 * @brief Add event packet handler. 1895 */ 1896 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1897 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1898 } 1899 1900 1901 /** Register HCI packet handlers */ 1902 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 1903 hci_stack->acl_packet_handler = handler; 1904 } 1905 1906 /** 1907 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1908 */ 1909 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 1910 hci_stack->sco_packet_handler = handler; 1911 } 1912 1913 static void hci_state_reset(void){ 1914 // no connections yet 1915 hci_stack->connections = NULL; 1916 1917 // keep discoverable/connectable as this has been requested by the client(s) 1918 // hci_stack->discoverable = 0; 1919 // hci_stack->connectable = 0; 1920 // hci_stack->bondable = 1; 1921 1922 // buffer is free 1923 hci_stack->hci_packet_buffer_reserved = 0; 1924 1925 // no pending cmds 1926 hci_stack->decline_reason = 0; 1927 hci_stack->new_scan_enable_value = 0xff; 1928 1929 // LE 1930 hci_stack->adv_addr_type = 0; 1931 memset(hci_stack->adv_address, 0, 6); 1932 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1933 hci_stack->le_scan_type = 0xff; 1934 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1935 hci_stack->le_whitelist = 0; 1936 hci_stack->le_whitelist_capacity = 0; 1937 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1938 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1939 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1940 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1941 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1942 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1943 } 1944 1945 /** 1946 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1947 */ 1948 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1949 // store and open remote device db 1950 hci_stack->link_key_db = link_key_db; 1951 if (hci_stack->link_key_db) { 1952 hci_stack->link_key_db->open(); 1953 } 1954 } 1955 1956 void hci_init(const hci_transport_t *transport, const void *config){ 1957 1958 #ifdef HAVE_MALLOC 1959 if (!hci_stack) { 1960 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1961 } 1962 #else 1963 hci_stack = &hci_stack_static; 1964 #endif 1965 memset(hci_stack, 0, sizeof(hci_stack_t)); 1966 1967 // reference to use transport layer implementation 1968 hci_stack->hci_transport = transport; 1969 1970 // reference to used config 1971 hci_stack->config = config; 1972 1973 // max acl payload size defined in config.h 1974 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1975 1976 // register packet handlers with transport 1977 transport->register_packet_handler(&packet_handler); 1978 1979 hci_stack->state = HCI_STATE_OFF; 1980 1981 // class of device 1982 hci_stack->class_of_device = 0x007a020c; // Smartphone 1983 1984 // bondable by default 1985 hci_stack->bondable = 1; 1986 1987 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1988 hci_stack->ssp_enable = 1; 1989 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1990 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1991 hci_stack->ssp_auto_accept = 1; 1992 1993 // voice setting - signed 8 bit pcm data with CVSD over the air 1994 hci_stack->sco_voice_setting = 0x40; 1995 1996 hci_state_reset(); 1997 } 1998 1999 /** 2000 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2001 */ 2002 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2003 hci_stack->chipset = chipset_driver; 2004 2005 // reset chipset driver - init is also called on power_up 2006 if (hci_stack->chipset && hci_stack->chipset->init){ 2007 hci_stack->chipset->init(hci_stack->config); 2008 } 2009 } 2010 2011 /** 2012 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2013 */ 2014 void hci_set_control(const btstack_control_t *hardware_control){ 2015 // references to used control implementation 2016 hci_stack->control = hardware_control; 2017 // init with transport config 2018 hardware_control->init(hci_stack->config); 2019 } 2020 2021 void hci_close(void){ 2022 // close remote device db 2023 if (hci_stack->link_key_db) { 2024 hci_stack->link_key_db->close(); 2025 } 2026 while (hci_stack->connections) { 2027 // cancel all l2cap connections 2028 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 2029 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 2030 } 2031 hci_power_control(HCI_POWER_OFF); 2032 2033 #ifdef HAVE_MALLOC 2034 free(hci_stack); 2035 #endif 2036 hci_stack = NULL; 2037 } 2038 2039 void gap_set_class_of_device(uint32_t class_of_device){ 2040 hci_stack->class_of_device = class_of_device; 2041 } 2042 2043 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2044 void hci_set_bd_addr(bd_addr_t addr){ 2045 memcpy(hci_stack->custom_bd_addr, addr, 6); 2046 hci_stack->custom_bd_addr_set = 1; 2047 } 2048 2049 void hci_disable_l2cap_timeout_check(void){ 2050 disable_l2cap_timeouts = 1; 2051 } 2052 // State-Module-Driver overview 2053 // state module low-level 2054 // HCI_STATE_OFF off close 2055 // HCI_STATE_INITIALIZING, on open 2056 // HCI_STATE_WORKING, on open 2057 // HCI_STATE_HALTING, on open 2058 // HCI_STATE_SLEEPING, off/sleep close 2059 // HCI_STATE_FALLING_ASLEEP on open 2060 2061 static int hci_power_control_on(void){ 2062 2063 // power on 2064 int err = 0; 2065 if (hci_stack->control && hci_stack->control->on){ 2066 err = (*hci_stack->control->on)(); 2067 } 2068 if (err){ 2069 log_error( "POWER_ON failed"); 2070 hci_emit_hci_open_failed(); 2071 return err; 2072 } 2073 2074 // int chipset driver 2075 if (hci_stack->chipset && hci_stack->chipset->init){ 2076 hci_stack->chipset->init(hci_stack->config); 2077 } 2078 2079 // init transport 2080 if (hci_stack->hci_transport->init){ 2081 hci_stack->hci_transport->init(hci_stack->config); 2082 } 2083 2084 // open transport 2085 err = hci_stack->hci_transport->open(); 2086 if (err){ 2087 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2088 if (hci_stack->control && hci_stack->control->off){ 2089 (*hci_stack->control->off)(); 2090 } 2091 hci_emit_hci_open_failed(); 2092 return err; 2093 } 2094 return 0; 2095 } 2096 2097 static void hci_power_control_off(void){ 2098 2099 log_info("hci_power_control_off"); 2100 2101 // close low-level device 2102 hci_stack->hci_transport->close(); 2103 2104 log_info("hci_power_control_off - hci_transport closed"); 2105 2106 // power off 2107 if (hci_stack->control && hci_stack->control->off){ 2108 (*hci_stack->control->off)(); 2109 } 2110 2111 log_info("hci_power_control_off - control closed"); 2112 2113 hci_stack->state = HCI_STATE_OFF; 2114 } 2115 2116 static void hci_power_control_sleep(void){ 2117 2118 log_info("hci_power_control_sleep"); 2119 2120 #if 0 2121 // don't close serial port during sleep 2122 2123 // close low-level device 2124 hci_stack->hci_transport->close(hci_stack->config); 2125 #endif 2126 2127 // sleep mode 2128 if (hci_stack->control && hci_stack->control->sleep){ 2129 (*hci_stack->control->sleep)(); 2130 } 2131 2132 hci_stack->state = HCI_STATE_SLEEPING; 2133 } 2134 2135 static int hci_power_control_wake(void){ 2136 2137 log_info("hci_power_control_wake"); 2138 2139 // wake on 2140 if (hci_stack->control && hci_stack->control->wake){ 2141 (*hci_stack->control->wake)(); 2142 } 2143 2144 #if 0 2145 // open low-level device 2146 int err = hci_stack->hci_transport->open(hci_stack->config); 2147 if (err){ 2148 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2149 if (hci_stack->control && hci_stack->control->off){ 2150 (*hci_stack->control->off)(); 2151 } 2152 hci_emit_hci_open_failed(); 2153 return err; 2154 } 2155 #endif 2156 2157 return 0; 2158 } 2159 2160 static void hci_power_transition_to_initializing(void){ 2161 // set up state machine 2162 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2163 hci_stack->hci_packet_buffer_reserved = 0; 2164 hci_stack->state = HCI_STATE_INITIALIZING; 2165 hci_stack->substate = HCI_INIT_SEND_RESET; 2166 } 2167 2168 int hci_power_control(HCI_POWER_MODE power_mode){ 2169 2170 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2171 2172 int err = 0; 2173 switch (hci_stack->state){ 2174 2175 case HCI_STATE_OFF: 2176 switch (power_mode){ 2177 case HCI_POWER_ON: 2178 err = hci_power_control_on(); 2179 if (err) { 2180 log_error("hci_power_control_on() error %u", err); 2181 return err; 2182 } 2183 hci_power_transition_to_initializing(); 2184 break; 2185 case HCI_POWER_OFF: 2186 // do nothing 2187 break; 2188 case HCI_POWER_SLEEP: 2189 // do nothing (with SLEEP == OFF) 2190 break; 2191 } 2192 break; 2193 2194 case HCI_STATE_INITIALIZING: 2195 switch (power_mode){ 2196 case HCI_POWER_ON: 2197 // do nothing 2198 break; 2199 case HCI_POWER_OFF: 2200 // no connections yet, just turn it off 2201 hci_power_control_off(); 2202 break; 2203 case HCI_POWER_SLEEP: 2204 // no connections yet, just turn it off 2205 hci_power_control_sleep(); 2206 break; 2207 } 2208 break; 2209 2210 case HCI_STATE_WORKING: 2211 switch (power_mode){ 2212 case HCI_POWER_ON: 2213 // do nothing 2214 break; 2215 case HCI_POWER_OFF: 2216 // see hci_run 2217 hci_stack->state = HCI_STATE_HALTING; 2218 break; 2219 case HCI_POWER_SLEEP: 2220 // see hci_run 2221 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2222 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2223 break; 2224 } 2225 break; 2226 2227 case HCI_STATE_HALTING: 2228 switch (power_mode){ 2229 case HCI_POWER_ON: 2230 hci_power_transition_to_initializing(); 2231 break; 2232 case HCI_POWER_OFF: 2233 // do nothing 2234 break; 2235 case HCI_POWER_SLEEP: 2236 // see hci_run 2237 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2238 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2239 break; 2240 } 2241 break; 2242 2243 case HCI_STATE_FALLING_ASLEEP: 2244 switch (power_mode){ 2245 case HCI_POWER_ON: 2246 2247 #ifdef HAVE_PLATFORM_IPHONE_OS 2248 // nothing to do, if H4 supports power management 2249 if (btstack_control_iphone_power_management_enabled()){ 2250 hci_stack->state = HCI_STATE_INITIALIZING; 2251 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2252 break; 2253 } 2254 #endif 2255 hci_power_transition_to_initializing(); 2256 break; 2257 case HCI_POWER_OFF: 2258 // see hci_run 2259 hci_stack->state = HCI_STATE_HALTING; 2260 break; 2261 case HCI_POWER_SLEEP: 2262 // do nothing 2263 break; 2264 } 2265 break; 2266 2267 case HCI_STATE_SLEEPING: 2268 switch (power_mode){ 2269 case HCI_POWER_ON: 2270 2271 #ifdef HAVE_PLATFORM_IPHONE_OS 2272 // nothing to do, if H4 supports power management 2273 if (btstack_control_iphone_power_management_enabled()){ 2274 hci_stack->state = HCI_STATE_INITIALIZING; 2275 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2276 hci_update_scan_enable(); 2277 break; 2278 } 2279 #endif 2280 err = hci_power_control_wake(); 2281 if (err) return err; 2282 hci_power_transition_to_initializing(); 2283 break; 2284 case HCI_POWER_OFF: 2285 hci_stack->state = HCI_STATE_HALTING; 2286 break; 2287 case HCI_POWER_SLEEP: 2288 // do nothing 2289 break; 2290 } 2291 break; 2292 } 2293 2294 // create internal event 2295 hci_emit_state(); 2296 2297 // trigger next/first action 2298 hci_run(); 2299 2300 return 0; 2301 } 2302 2303 static void hci_update_scan_enable(void){ 2304 // 2 = page scan, 1 = inq scan 2305 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2306 hci_run(); 2307 } 2308 2309 void gap_discoverable_control(uint8_t enable){ 2310 if (enable) enable = 1; // normalize argument 2311 2312 if (hci_stack->discoverable == enable){ 2313 hci_emit_discoverable_enabled(hci_stack->discoverable); 2314 return; 2315 } 2316 2317 hci_stack->discoverable = enable; 2318 hci_update_scan_enable(); 2319 } 2320 2321 void gap_connectable_control(uint8_t enable){ 2322 if (enable) enable = 1; // normalize argument 2323 2324 // don't emit event 2325 if (hci_stack->connectable == enable) return; 2326 2327 hci_stack->connectable = enable; 2328 hci_update_scan_enable(); 2329 } 2330 2331 void gap_local_bd_addr(bd_addr_t address_buffer){ 2332 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2333 } 2334 2335 static void hci_run(void){ 2336 2337 // log_info("hci_run: entered"); 2338 btstack_linked_item_t * it; 2339 2340 // send continuation fragments first, as they block the prepared packet buffer 2341 if (hci_stack->acl_fragmentation_total_size > 0) { 2342 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2343 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2344 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2345 if (connection) { 2346 hci_send_acl_packet_fragments(connection); 2347 return; 2348 } 2349 // connection gone -> discard further fragments 2350 hci_stack->acl_fragmentation_total_size = 0; 2351 hci_stack->acl_fragmentation_pos = 0; 2352 } 2353 } 2354 2355 if (!hci_can_send_command_packet_now()) return; 2356 2357 // global/non-connection oriented commands 2358 2359 // decline incoming connections 2360 if (hci_stack->decline_reason){ 2361 uint8_t reason = hci_stack->decline_reason; 2362 hci_stack->decline_reason = 0; 2363 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2364 return; 2365 } 2366 2367 // send scan enable 2368 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2369 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2370 hci_stack->new_scan_enable_value = 0xff; 2371 return; 2372 } 2373 2374 #ifdef ENABLE_BLE 2375 if (hci_stack->state == HCI_STATE_WORKING){ 2376 // handle le scan 2377 switch(hci_stack->le_scanning_state){ 2378 case LE_START_SCAN: 2379 hci_stack->le_scanning_state = LE_SCANNING; 2380 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2381 return; 2382 2383 case LE_STOP_SCAN: 2384 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2385 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2386 return; 2387 default: 2388 break; 2389 } 2390 if (hci_stack->le_scan_type != 0xff){ 2391 // defaults: active scanning, accept all advertisement packets 2392 int scan_type = hci_stack->le_scan_type; 2393 hci_stack->le_scan_type = 0xff; 2394 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); 2395 return; 2396 } 2397 // le advertisement control 2398 if (hci_stack->le_advertisements_todo){ 2399 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2400 } 2401 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2402 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2403 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2404 return; 2405 } 2406 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2407 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2408 hci_send_cmd(&hci_le_set_advertising_parameters, 2409 hci_stack->le_advertisements_interval_min, 2410 hci_stack->le_advertisements_interval_max, 2411 hci_stack->le_advertisements_type, 2412 hci_stack->le_advertisements_own_address_type, 2413 hci_stack->le_advertisements_direct_address_type, 2414 hci_stack->le_advertisements_direct_address, 2415 hci_stack->le_advertisements_channel_map, 2416 hci_stack->le_advertisements_filter_policy); 2417 return; 2418 } 2419 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2420 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2421 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2422 hci_stack->le_advertisements_data); 2423 return; 2424 } 2425 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2426 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2427 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2428 hci_stack->le_scan_response_data); 2429 return; 2430 } 2431 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2432 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2433 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2434 return; 2435 } 2436 2437 // 2438 // LE Whitelist Management 2439 // 2440 2441 // check if whitelist needs modification 2442 btstack_linked_list_iterator_t lit; 2443 int modification_pending = 0; 2444 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2445 while (btstack_linked_list_iterator_has_next(&lit)){ 2446 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2447 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2448 modification_pending = 1; 2449 break; 2450 } 2451 } 2452 2453 if (modification_pending){ 2454 // stop connnecting if modification pending 2455 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2456 hci_send_cmd(&hci_le_create_connection_cancel); 2457 return; 2458 } 2459 2460 // add/remove entries 2461 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2462 while (btstack_linked_list_iterator_has_next(&lit)){ 2463 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2464 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2465 entry->state = LE_WHITELIST_ON_CONTROLLER; 2466 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2467 return; 2468 2469 } 2470 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2471 bd_addr_t address; 2472 bd_addr_type_t address_type = entry->address_type; 2473 memcpy(address, entry->address, 6); 2474 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2475 btstack_memory_whitelist_entry_free(entry); 2476 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2477 return; 2478 } 2479 } 2480 } 2481 2482 // start connecting 2483 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2484 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2485 bd_addr_t null_addr; 2486 memset(null_addr, 0, 6); 2487 hci_send_cmd(&hci_le_create_connection, 2488 0x0060, // scan interval: 60 ms 2489 0x0030, // scan interval: 30 ms 2490 1, // use whitelist 2491 0, // peer address type 2492 null_addr, // peer bd addr 2493 hci_stack->adv_addr_type, // our addr type: 2494 0x0008, // conn interval min 2495 0x0018, // conn interval max 2496 0, // conn latency 2497 0x0048, // supervision timeout 2498 0x0001, // min ce length 2499 0x0001 // max ce length 2500 ); 2501 return; 2502 } 2503 } 2504 #endif 2505 2506 // send pending HCI commands 2507 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2508 hci_connection_t * connection = (hci_connection_t *) it; 2509 2510 switch(connection->state){ 2511 case SEND_CREATE_CONNECTION: 2512 switch(connection->address_type){ 2513 case BD_ADDR_TYPE_CLASSIC: 2514 log_info("sending hci_create_connection"); 2515 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2516 break; 2517 default: 2518 #ifdef ENABLE_BLE 2519 log_info("sending hci_le_create_connection"); 2520 hci_send_cmd(&hci_le_create_connection, 2521 0x0060, // scan interval: 60 ms 2522 0x0030, // scan interval: 30 ms 2523 0, // don't use whitelist 2524 connection->address_type, // peer address type 2525 connection->address, // peer bd addr 2526 hci_stack->adv_addr_type, // our addr type: 2527 0x0008, // conn interval min 2528 0x0018, // conn interval max 2529 0, // conn latency 2530 0x0048, // supervision timeout 2531 0x0001, // min ce length 2532 0x0001 // max ce length 2533 ); 2534 2535 connection->state = SENT_CREATE_CONNECTION; 2536 #endif 2537 break; 2538 } 2539 return; 2540 2541 case RECEIVED_CONNECTION_REQUEST: 2542 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2543 connection->state = ACCEPTED_CONNECTION_REQUEST; 2544 connection->role = HCI_ROLE_SLAVE; 2545 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2546 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2547 } else { 2548 // remote supported feature eSCO is set if link type is eSCO 2549 uint16_t max_latency; 2550 uint8_t retransmission_effort; 2551 uint16_t packet_types; 2552 // remote supported feature eSCO is set if link type is eSCO 2553 if (connection->remote_supported_feature_eSCO){ 2554 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 2555 max_latency = 0x000c; 2556 retransmission_effort = 0x02; 2557 packet_types = 0x388; 2558 } else { 2559 // SCO: max latency, retransmission interval: N/A. any packet type 2560 max_latency = 0xffff; 2561 retransmission_effort = 0xff; 2562 packet_types = 0x003f; 2563 } 2564 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, max_latency, hci_stack->sco_voice_setting, retransmission_effort, packet_types); 2565 } 2566 return; 2567 2568 #ifdef ENABLE_BLE 2569 case SEND_CANCEL_CONNECTION: 2570 connection->state = SENT_CANCEL_CONNECTION; 2571 hci_send_cmd(&hci_le_create_connection_cancel); 2572 return; 2573 #endif 2574 case SEND_DISCONNECT: 2575 connection->state = SENT_DISCONNECT; 2576 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2577 return; 2578 2579 default: 2580 break; 2581 } 2582 2583 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2584 log_info("responding to link key request"); 2585 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2586 link_key_t link_key; 2587 link_key_type_t link_key_type; 2588 if ( hci_stack->link_key_db 2589 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2590 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2591 connection->link_key_type = link_key_type; 2592 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2593 } else { 2594 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2595 } 2596 return; 2597 } 2598 2599 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2600 log_info("denying to pin request"); 2601 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2602 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2603 return; 2604 } 2605 2606 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2607 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2608 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2609 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2610 // tweak authentication requirements 2611 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2612 if (connection->bonding_flags & BONDING_DEDICATED){ 2613 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2614 } 2615 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2616 authreq |= 1; 2617 } 2618 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2619 } else { 2620 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2621 } 2622 return; 2623 } 2624 2625 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2626 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2627 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2628 return; 2629 } 2630 2631 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2632 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2633 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2634 return; 2635 } 2636 2637 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2638 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2639 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2640 return; 2641 } 2642 2643 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2644 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2645 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2646 return; 2647 } 2648 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2649 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2650 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2651 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2652 return; 2653 } 2654 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2655 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2656 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2657 return; 2658 } 2659 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2660 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2661 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2662 return; 2663 } 2664 2665 #ifdef ENABLE_BLE 2666 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2667 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2668 2669 uint16_t connection_interval_min = connection->le_conn_interval_min; 2670 connection->le_conn_interval_min = 0; 2671 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2672 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2673 0x0000, 0xffff); 2674 } 2675 #endif 2676 } 2677 2678 hci_connection_t * connection; 2679 switch (hci_stack->state){ 2680 case HCI_STATE_INITIALIZING: 2681 hci_initializing_run(); 2682 break; 2683 2684 case HCI_STATE_HALTING: 2685 2686 log_info("HCI_STATE_HALTING"); 2687 2688 // free whitelist entries 2689 #ifdef ENABLE_BLE 2690 { 2691 btstack_linked_list_iterator_t lit; 2692 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2693 while (btstack_linked_list_iterator_has_next(&lit)){ 2694 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2695 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2696 btstack_memory_whitelist_entry_free(entry); 2697 } 2698 } 2699 #endif 2700 // close all open connections 2701 connection = (hci_connection_t *) hci_stack->connections; 2702 if (connection){ 2703 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2704 if (!hci_can_send_command_packet_now()) return; 2705 2706 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2707 2708 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2709 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2710 2711 // ... which would be ignored anyway as we shutdown (free) the connection now 2712 hci_shutdown_connection(connection); 2713 2714 // finally, send the disconnect command 2715 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2716 return; 2717 } 2718 log_info("HCI_STATE_HALTING, calling off"); 2719 2720 // switch mode 2721 hci_power_control_off(); 2722 2723 log_info("HCI_STATE_HALTING, emitting state"); 2724 hci_emit_state(); 2725 log_info("HCI_STATE_HALTING, done"); 2726 break; 2727 2728 case HCI_STATE_FALLING_ASLEEP: 2729 switch(hci_stack->substate) { 2730 case HCI_FALLING_ASLEEP_DISCONNECT: 2731 log_info("HCI_STATE_FALLING_ASLEEP"); 2732 // close all open connections 2733 connection = (hci_connection_t *) hci_stack->connections; 2734 2735 #ifdef HAVE_PLATFORM_IPHONE_OS 2736 // don't close connections, if H4 supports power management 2737 if (btstack_control_iphone_power_management_enabled()){ 2738 connection = NULL; 2739 } 2740 #endif 2741 if (connection){ 2742 2743 // send disconnect 2744 if (!hci_can_send_command_packet_now()) return; 2745 2746 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2747 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2748 2749 // send disconnected event right away - causes higher layer connections to get closed, too. 2750 hci_shutdown_connection(connection); 2751 return; 2752 } 2753 2754 if (hci_classic_supported()){ 2755 // disable page and inquiry scan 2756 if (!hci_can_send_command_packet_now()) return; 2757 2758 log_info("HCI_STATE_HALTING, disabling inq scans"); 2759 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2760 2761 // continue in next sub state 2762 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2763 break; 2764 } 2765 // fall through for ble-only chips 2766 2767 case HCI_FALLING_ASLEEP_COMPLETE: 2768 log_info("HCI_STATE_HALTING, calling sleep"); 2769 #ifdef HAVE_PLATFORM_IPHONE_OS 2770 // don't actually go to sleep, if H4 supports power management 2771 if (btstack_control_iphone_power_management_enabled()){ 2772 // SLEEP MODE reached 2773 hci_stack->state = HCI_STATE_SLEEPING; 2774 hci_emit_state(); 2775 break; 2776 } 2777 #endif 2778 // switch mode 2779 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2780 hci_emit_state(); 2781 break; 2782 2783 default: 2784 break; 2785 } 2786 break; 2787 2788 default: 2789 break; 2790 } 2791 } 2792 2793 int hci_send_cmd_packet(uint8_t *packet, int size){ 2794 bd_addr_t addr; 2795 hci_connection_t * conn; 2796 // house-keeping 2797 2798 // create_connection? 2799 if (IS_COMMAND(packet, hci_create_connection)){ 2800 reverse_bd_addr(&packet[3], addr); 2801 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2802 2803 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2804 if (!conn){ 2805 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2806 if (!conn){ 2807 // notify client that alloc failed 2808 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2809 return 0; // don't sent packet to controller 2810 } 2811 conn->state = SEND_CREATE_CONNECTION; 2812 } 2813 log_info("conn state %u", conn->state); 2814 switch (conn->state){ 2815 // if connection active exists 2816 case OPEN: 2817 // and OPEN, emit connection complete command, don't send to controller 2818 hci_emit_connection_complete(conn, 0); 2819 return 0; 2820 case SEND_CREATE_CONNECTION: 2821 // connection created by hci, e.g. dedicated bonding 2822 break; 2823 default: 2824 // otherwise, just ignore as it is already in the open process 2825 return 0; 2826 } 2827 conn->state = SENT_CREATE_CONNECTION; 2828 } 2829 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2830 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2831 } 2832 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2833 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2834 } 2835 2836 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2837 if (hci_stack->link_key_db){ 2838 reverse_bd_addr(&packet[3], addr); 2839 hci_stack->link_key_db->delete_link_key(addr); 2840 } 2841 } 2842 2843 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2844 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2845 reverse_bd_addr(&packet[3], addr); 2846 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2847 if (conn){ 2848 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2849 } 2850 } 2851 2852 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2853 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2854 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2855 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2856 reverse_bd_addr(&packet[3], addr); 2857 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2858 if (conn){ 2859 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2860 } 2861 } 2862 2863 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2864 hci_stack->loopback_mode = packet[3]; 2865 } 2866 2867 #ifdef ENABLE_BLE 2868 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2869 hci_stack->adv_addr_type = packet[8]; 2870 } 2871 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2872 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2873 } 2874 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2875 hci_stack->le_advertisements_active = packet[3]; 2876 } 2877 if (IS_COMMAND(packet, hci_le_create_connection)){ 2878 // white list used? 2879 uint8_t initiator_filter_policy = packet[7]; 2880 switch (initiator_filter_policy){ 2881 case 0: 2882 // whitelist not used 2883 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2884 break; 2885 case 1: 2886 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2887 break; 2888 default: 2889 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2890 break; 2891 } 2892 } 2893 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2894 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2895 } 2896 #endif 2897 2898 hci_stack->num_cmd_packets--; 2899 2900 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2901 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2902 2903 // release packet buffer for synchronous transport implementations 2904 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2905 hci_stack->hci_packet_buffer_reserved = 0; 2906 } 2907 2908 return err; 2909 } 2910 2911 // disconnect because of security block 2912 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2913 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2914 if (!connection) return; 2915 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2916 } 2917 2918 2919 // Configure Secure Simple Pairing 2920 2921 // enable will enable SSP during init 2922 void gap_ssp_set_enable(int enable){ 2923 hci_stack->ssp_enable = enable; 2924 } 2925 2926 static int hci_local_ssp_activated(void){ 2927 return gap_ssp_supported() && hci_stack->ssp_enable; 2928 } 2929 2930 // if set, BTstack will respond to io capability request using authentication requirement 2931 void gap_ssp_set_io_capability(int io_capability){ 2932 hci_stack->ssp_io_capability = io_capability; 2933 } 2934 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 2935 hci_stack->ssp_authentication_requirement = authentication_requirement; 2936 } 2937 2938 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2939 void gap_ssp_set_auto_accept(int auto_accept){ 2940 hci_stack->ssp_auto_accept = auto_accept; 2941 } 2942 2943 /** 2944 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2945 */ 2946 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2947 2948 if (!hci_can_send_command_packet_now()){ 2949 log_error("hci_send_cmd called but cannot send packet now"); 2950 return 0; 2951 } 2952 2953 // for HCI INITIALIZATION 2954 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2955 hci_stack->last_cmd_opcode = cmd->opcode; 2956 2957 hci_reserve_packet_buffer(); 2958 uint8_t * packet = hci_stack->hci_packet_buffer; 2959 2960 va_list argptr; 2961 va_start(argptr, cmd); 2962 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 2963 va_end(argptr); 2964 2965 return hci_send_cmd_packet(packet, size); 2966 } 2967 2968 // Create various non-HCI events. 2969 // TODO: generalize, use table similar to hci_create_command 2970 2971 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 2972 // dump packet 2973 if (dump) { 2974 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 2975 } 2976 2977 // dispatch to all event handlers 2978 btstack_linked_list_iterator_t it; 2979 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 2980 while (btstack_linked_list_iterator_has_next(&it)){ 2981 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 2982 entry->callback(HCI_EVENT_PACKET, 0, event, size); 2983 } 2984 } 2985 2986 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 2987 if (!hci_stack->acl_packet_handler) return; 2988 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 2989 } 2990 2991 static void hci_notify_if_sco_can_send_now(void){ 2992 // notify SCO sender if waiting 2993 if (!hci_stack->sco_waiting_for_can_send_now) return; 2994 if (hci_can_send_sco_packet_now()){ 2995 hci_stack->sco_waiting_for_can_send_now = 0; 2996 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 2997 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 2998 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2999 } 3000 } 3001 3002 void hci_emit_state(void){ 3003 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3004 uint8_t event[3]; 3005 event[0] = BTSTACK_EVENT_STATE; 3006 event[1] = sizeof(event) - 2; 3007 event[2] = hci_stack->state; 3008 hci_emit_event(event, sizeof(event), 1); 3009 } 3010 3011 static void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 3012 uint8_t event[13]; 3013 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3014 event[1] = sizeof(event) - 2; 3015 event[2] = status; 3016 little_endian_store_16(event, 3, conn->con_handle); 3017 reverse_bd_addr(conn->address, &event[5]); 3018 event[11] = 1; // ACL connection 3019 event[12] = 0; // encryption disabled 3020 hci_emit_event(event, sizeof(event), 1); 3021 } 3022 3023 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3024 uint8_t event[21]; 3025 event[0] = HCI_EVENT_LE_META; 3026 event[1] = sizeof(event) - 2; 3027 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3028 event[3] = status; 3029 little_endian_store_16(event, 4, con_handle); 3030 event[6] = 0; // TODO: role 3031 event[7] = address_type; 3032 reverse_bd_addr(address, &event[8]); 3033 little_endian_store_16(event, 14, 0); // interval 3034 little_endian_store_16(event, 16, 0); // latency 3035 little_endian_store_16(event, 18, 0); // supervision timeout 3036 event[20] = 0; // master clock accuracy 3037 hci_emit_event(event, sizeof(event), 1); 3038 } 3039 3040 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3041 uint8_t event[6]; 3042 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3043 event[1] = sizeof(event) - 2; 3044 event[2] = 0; // status = OK 3045 little_endian_store_16(event, 3, con_handle); 3046 event[5] = reason; 3047 hci_emit_event(event, sizeof(event), 1); 3048 } 3049 3050 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3051 if (disable_l2cap_timeouts) return; 3052 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3053 uint8_t event[4]; 3054 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3055 event[1] = sizeof(event) - 2; 3056 little_endian_store_16(event, 2, conn->con_handle); 3057 hci_emit_event(event, sizeof(event), 1); 3058 } 3059 3060 static void hci_emit_nr_connections_changed(void){ 3061 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3062 uint8_t event[3]; 3063 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3064 event[1] = sizeof(event) - 2; 3065 event[2] = nr_hci_connections(); 3066 hci_emit_event(event, sizeof(event), 1); 3067 } 3068 3069 static void hci_emit_hci_open_failed(void){ 3070 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3071 uint8_t event[2]; 3072 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3073 event[1] = sizeof(event) - 2; 3074 hci_emit_event(event, sizeof(event), 1); 3075 } 3076 3077 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3078 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3079 uint8_t event[3]; 3080 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3081 event[1] = sizeof(event) - 2; 3082 event[2] = enabled; 3083 hci_emit_event(event, sizeof(event), 1); 3084 } 3085 3086 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3087 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3088 uint8_t event[5]; 3089 int pos = 0; 3090 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3091 event[pos++] = sizeof(event) - 2; 3092 little_endian_store_16(event, 2, con_handle); 3093 pos += 2; 3094 event[pos++] = level; 3095 hci_emit_event(event, sizeof(event), 1); 3096 } 3097 3098 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3099 log_info("hci_emit_dedicated_bonding_result %u ", status); 3100 uint8_t event[9]; 3101 int pos = 0; 3102 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3103 event[pos++] = sizeof(event) - 2; 3104 event[pos++] = status; 3105 reverse_bd_addr(address, &event[pos]); 3106 pos += 6; 3107 hci_emit_event(event, sizeof(event), 1); 3108 } 3109 3110 // query if remote side supports eSCO 3111 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3112 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3113 if (!connection) return 0; 3114 return connection->remote_supported_feature_eSCO; 3115 } 3116 3117 // query if remote side supports SSP 3118 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3119 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3120 if (!connection) return 0; 3121 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3122 } 3123 3124 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3125 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3126 } 3127 3128 // GAP API 3129 /** 3130 * @bbrief enable/disable bonding. default is enabled 3131 * @praram enabled 3132 */ 3133 void gap_set_bondable_mode(int enable){ 3134 hci_stack->bondable = enable ? 1 : 0; 3135 } 3136 /** 3137 * @brief Get bondable mode. 3138 * @return 1 if bondable 3139 */ 3140 int gap_get_bondable_mode(void){ 3141 return hci_stack->bondable; 3142 } 3143 3144 /** 3145 * @brief map link keys to security levels 3146 */ 3147 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3148 switch (link_key_type){ 3149 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3150 return LEVEL_4; 3151 case COMBINATION_KEY: 3152 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3153 return LEVEL_3; 3154 default: 3155 return LEVEL_2; 3156 } 3157 } 3158 3159 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3160 if (!connection) return LEVEL_0; 3161 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3162 return gap_security_level_for_link_key_type(connection->link_key_type); 3163 } 3164 3165 3166 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3167 log_info("gap_mitm_protection_required_for_security_level %u", level); 3168 return level > LEVEL_2; 3169 } 3170 3171 /** 3172 * @brief get current security level 3173 */ 3174 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3175 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3176 if (!connection) return LEVEL_0; 3177 return gap_security_level_for_connection(connection); 3178 } 3179 3180 /** 3181 * @brief request connection to device to 3182 * @result GAP_AUTHENTICATION_RESULT 3183 */ 3184 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3185 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3186 if (!connection){ 3187 hci_emit_security_level(con_handle, LEVEL_0); 3188 return; 3189 } 3190 gap_security_level_t current_level = gap_security_level(con_handle); 3191 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3192 if (current_level >= requested_level){ 3193 hci_emit_security_level(con_handle, current_level); 3194 return; 3195 } 3196 3197 connection->requested_security_level = requested_level; 3198 3199 #if 0 3200 // sending encryption request without a link key results in an error. 3201 // TODO: figure out how to use it properly 3202 3203 // would enabling ecnryption suffice (>= LEVEL_2)? 3204 if (hci_stack->link_key_db){ 3205 link_key_type_t link_key_type; 3206 link_key_t link_key; 3207 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3208 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3209 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3210 return; 3211 } 3212 } 3213 } 3214 #endif 3215 3216 // try to authenticate connection 3217 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3218 hci_run(); 3219 } 3220 3221 /** 3222 * @brief start dedicated bonding with device. disconnect after bonding 3223 * @param device 3224 * @param request MITM protection 3225 * @result GAP_DEDICATED_BONDING_COMPLETE 3226 */ 3227 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3228 3229 // create connection state machine 3230 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3231 3232 if (!connection){ 3233 return BTSTACK_MEMORY_ALLOC_FAILED; 3234 } 3235 3236 // delete linkn key 3237 gap_drop_link_key_for_bd_addr(device); 3238 3239 // configure LEVEL_2/3, dedicated bonding 3240 connection->state = SEND_CREATE_CONNECTION; 3241 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3242 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3243 connection->bonding_flags = BONDING_DEDICATED; 3244 3245 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3246 3247 // handle: connnection failure (connection complete != ok) 3248 // handle: authentication failure 3249 // handle: disconnect on done 3250 3251 hci_run(); 3252 3253 return 0; 3254 } 3255 3256 void gap_set_local_name(const char * local_name){ 3257 hci_stack->local_name = local_name; 3258 } 3259 3260 void gap_start_scan(void){ 3261 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3262 hci_stack->le_scanning_state = LE_START_SCAN; 3263 hci_run(); 3264 } 3265 3266 void gap_stop_scan(void){ 3267 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3268 hci_stack->le_scanning_state = LE_STOP_SCAN; 3269 hci_run(); 3270 } 3271 3272 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3273 hci_stack->le_scan_type = scan_type; 3274 hci_stack->le_scan_interval = scan_interval; 3275 hci_stack->le_scan_window = scan_window; 3276 hci_run(); 3277 } 3278 3279 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3280 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3281 if (!conn){ 3282 log_info("gap_connect: no connection exists yet, creating context"); 3283 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3284 if (!conn){ 3285 // notify client that alloc failed 3286 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3287 log_info("gap_connect: failed to alloc hci_connection_t"); 3288 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3289 } 3290 conn->state = SEND_CREATE_CONNECTION; 3291 log_info("gap_connect: send create connection next"); 3292 hci_run(); 3293 return 0; 3294 } 3295 3296 if (!hci_is_le_connection(conn) || 3297 conn->state == SEND_CREATE_CONNECTION || 3298 conn->state == SENT_CREATE_CONNECTION) { 3299 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3300 log_error("gap_connect: classic connection or connect is already being created"); 3301 return GATT_CLIENT_IN_WRONG_STATE; 3302 } 3303 3304 log_info("gap_connect: context exists with state %u", conn->state); 3305 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3306 hci_run(); 3307 return 0; 3308 } 3309 3310 // @assumption: only a single outgoing LE Connection exists 3311 static hci_connection_t * gap_get_outgoing_connection(void){ 3312 btstack_linked_item_t *it; 3313 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3314 hci_connection_t * conn = (hci_connection_t *) it; 3315 if (!hci_is_le_connection(conn)) continue; 3316 switch (conn->state){ 3317 case SEND_CREATE_CONNECTION: 3318 case SENT_CREATE_CONNECTION: 3319 return conn; 3320 default: 3321 break; 3322 }; 3323 } 3324 return NULL; 3325 } 3326 3327 uint8_t gap_connect_cancel(void){ 3328 hci_connection_t * conn = gap_get_outgoing_connection(); 3329 if (!conn) return 0; 3330 switch (conn->state){ 3331 case SEND_CREATE_CONNECTION: 3332 // skip sending create connection and emit event instead 3333 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3334 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3335 btstack_memory_hci_connection_free( conn ); 3336 break; 3337 case SENT_CREATE_CONNECTION: 3338 // request to send cancel connection 3339 conn->state = SEND_CANCEL_CONNECTION; 3340 hci_run(); 3341 break; 3342 default: 3343 break; 3344 } 3345 return 0; 3346 } 3347 3348 /** 3349 * @brief Updates the connection parameters for a given LE connection 3350 * @param handle 3351 * @param conn_interval_min (unit: 1.25ms) 3352 * @param conn_interval_max (unit: 1.25ms) 3353 * @param conn_latency 3354 * @param supervision_timeout (unit: 10ms) 3355 * @returns 0 if ok 3356 */ 3357 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3358 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3359 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3360 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3361 connection->le_conn_interval_min = conn_interval_min; 3362 connection->le_conn_interval_max = conn_interval_max; 3363 connection->le_conn_latency = conn_latency; 3364 connection->le_supervision_timeout = supervision_timeout; 3365 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3366 hci_run(); 3367 return 0; 3368 } 3369 3370 /** 3371 * @brief Request an update of the connection parameter for a given LE connection 3372 * @param handle 3373 * @param conn_interval_min (unit: 1.25ms) 3374 * @param conn_interval_max (unit: 1.25ms) 3375 * @param conn_latency 3376 * @param supervision_timeout (unit: 10ms) 3377 * @returns 0 if ok 3378 */ 3379 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3380 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3381 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3382 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3383 connection->le_conn_interval_min = conn_interval_min; 3384 connection->le_conn_interval_max = conn_interval_max; 3385 connection->le_conn_latency = conn_latency; 3386 connection->le_supervision_timeout = supervision_timeout; 3387 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3388 hci_run(); 3389 return 0; 3390 } 3391 3392 static void gap_advertisments_changed(void){ 3393 // disable advertisements before updating adv, scan data, or adv params 3394 if (hci_stack->le_advertisements_active){ 3395 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3396 } 3397 hci_run(); 3398 } 3399 3400 /** 3401 * @brief Set Advertisement Data 3402 * @param advertising_data_length 3403 * @param advertising_data (max 31 octets) 3404 * @note data is not copied, pointer has to stay valid 3405 */ 3406 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3407 hci_stack->le_advertisements_data_len = advertising_data_length; 3408 hci_stack->le_advertisements_data = advertising_data; 3409 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3410 gap_advertisments_changed(); 3411 } 3412 3413 /** 3414 * @brief Set Scan Response Data 3415 * @param advertising_data_length 3416 * @param advertising_data (max 31 octets) 3417 * @note data is not copied, pointer has to stay valid 3418 */ 3419 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3420 hci_stack->le_scan_response_data_len = scan_response_data_length; 3421 hci_stack->le_scan_response_data = scan_response_data; 3422 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3423 gap_advertisments_changed(); 3424 } 3425 3426 /** 3427 * @brief Set Advertisement Parameters 3428 * @param adv_int_min 3429 * @param adv_int_max 3430 * @param adv_type 3431 * @param own_address_type 3432 * @param direct_address_type 3433 * @param direct_address 3434 * @param channel_map 3435 * @param filter_policy 3436 * 3437 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3438 */ 3439 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3440 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3441 uint8_t channel_map, uint8_t filter_policy) { 3442 3443 hci_stack->le_advertisements_interval_min = adv_int_min; 3444 hci_stack->le_advertisements_interval_max = adv_int_max; 3445 hci_stack->le_advertisements_type = adv_type; 3446 hci_stack->le_advertisements_own_address_type = own_address_type; 3447 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3448 hci_stack->le_advertisements_channel_map = channel_map; 3449 hci_stack->le_advertisements_filter_policy = filter_policy; 3450 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3451 3452 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3453 gap_advertisments_changed(); 3454 } 3455 3456 /** 3457 * @brief Enable/Disable Advertisements 3458 * @param enabled 3459 */ 3460 void gap_advertisements_enable(int enabled){ 3461 hci_stack->le_advertisements_enabled = enabled; 3462 if (enabled && !hci_stack->le_advertisements_active){ 3463 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3464 } 3465 if (!enabled && hci_stack->le_advertisements_active){ 3466 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3467 } 3468 hci_run(); 3469 } 3470 3471 3472 uint8_t gap_disconnect(hci_con_handle_t handle){ 3473 hci_connection_t * conn = hci_connection_for_handle(handle); 3474 if (!conn){ 3475 hci_emit_disconnection_complete(handle, 0); 3476 return 0; 3477 } 3478 conn->state = SEND_DISCONNECT; 3479 hci_run(); 3480 return 0; 3481 } 3482 3483 /** 3484 * @brief Get connection type 3485 * @param con_handle 3486 * @result connection_type 3487 */ 3488 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3489 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3490 if (!conn) return GAP_CONNECTION_INVALID; 3491 switch (conn->address_type){ 3492 case BD_ADDR_TYPE_LE_PUBLIC: 3493 case BD_ADDR_TYPE_LE_RANDOM: 3494 return GAP_CONNECTION_LE; 3495 case BD_ADDR_TYPE_SCO: 3496 return GAP_CONNECTION_SCO; 3497 case BD_ADDR_TYPE_CLASSIC: 3498 return GAP_CONNECTION_ACL; 3499 default: 3500 return GAP_CONNECTION_INVALID; 3501 } 3502 } 3503 3504 #ifdef ENABLE_BLE 3505 3506 /** 3507 * @brief Auto Connection Establishment - Start Connecting to device 3508 * @param address_typ 3509 * @param address 3510 * @returns 0 if ok 3511 */ 3512 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3513 // check capacity 3514 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3515 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3516 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3517 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3518 entry->address_type = address_type; 3519 memcpy(entry->address, address, 6); 3520 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3521 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3522 hci_run(); 3523 return 0; 3524 } 3525 3526 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3527 btstack_linked_list_iterator_t it; 3528 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3529 while (btstack_linked_list_iterator_has_next(&it)){ 3530 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3531 if (entry->address_type != address_type) continue; 3532 if (memcmp(entry->address, address, 6) != 0) continue; 3533 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3534 // remove from controller if already present 3535 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3536 continue; 3537 } 3538 // direclty remove entry from whitelist 3539 btstack_linked_list_iterator_remove(&it); 3540 btstack_memory_whitelist_entry_free(entry); 3541 } 3542 } 3543 3544 /** 3545 * @brief Auto Connection Establishment - Stop Connecting to device 3546 * @param address_typ 3547 * @param address 3548 * @returns 0 if ok 3549 */ 3550 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3551 hci_remove_from_whitelist(address_type, address); 3552 hci_run(); 3553 return 0; 3554 } 3555 3556 /** 3557 * @brief Auto Connection Establishment - Stop everything 3558 * @note Convenience function to stop all active auto connection attempts 3559 */ 3560 void gap_auto_connection_stop_all(void){ 3561 btstack_linked_list_iterator_t it; 3562 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3563 while (btstack_linked_list_iterator_has_next(&it)){ 3564 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3565 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3566 // remove from controller if already present 3567 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3568 continue; 3569 } 3570 // directly remove entry from whitelist 3571 btstack_linked_list_iterator_remove(&it); 3572 btstack_memory_whitelist_entry_free(entry); 3573 } 3574 hci_run(); 3575 } 3576 3577 #endif 3578 3579 /** 3580 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3581 */ 3582 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3583 hci_stack->sco_voice_setting = voice_setting; 3584 } 3585 3586 /** 3587 * @brief Get SCO Voice Setting 3588 * @return current voice setting 3589 */ 3590 uint16_t hci_get_sco_voice_setting(void){ 3591 return hci_stack->sco_voice_setting; 3592 } 3593 3594 /** @brief Get SCO packet length for current SCO Voice setting 3595 * @note Using SCO packets of the exact length is required for USB transfer 3596 * @return Length of SCO packets in bytes (not audio frames) 3597 */ 3598 int hci_get_sco_packet_length(void){ 3599 // see Core Spec for H2 USB Transfer. 3600 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3601 return 27; 3602 } 3603 3604 /** 3605 * @brief Set callback for Bluetooth Hardware Error 3606 */ 3607 void hci_set_hardware_error_callback(void (*fn)(void)){ 3608 hci_stack->hardware_error_callback = fn; 3609 } 3610 3611 /** 3612 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3613 * @note Can be used to select chipset driver dynamically during startup 3614 */ 3615 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3616 hci_stack->local_version_information_callback = fn; 3617 } 3618 3619 void hci_disconnect_all(void){ 3620 btstack_linked_list_iterator_t it; 3621 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3622 while (btstack_linked_list_iterator_has_next(&it)){ 3623 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3624 if (con->state == SENT_DISCONNECT) continue; 3625 con->state = SEND_DISCONNECT; 3626 } 3627 hci_run(); 3628 } 3629