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(bd_addr_t address, hci_con_handle_t con_handle, 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 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 268 hci_stack->link_key_db->delete_link_key(addr); 269 } 270 271 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 272 if (!hci_stack->link_key_db) return; 273 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 274 hci_stack->link_key_db->put_link_key(addr, link_key, type); 275 } 276 277 static int hci_is_le_connection(hci_connection_t * connection){ 278 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 279 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 280 } 281 282 /** 283 * count connections 284 */ 285 static int nr_hci_connections(void){ 286 int count = 0; 287 btstack_linked_item_t *it; 288 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 289 return count; 290 } 291 292 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 293 294 int num_packets_sent_classic = 0; 295 int num_packets_sent_le = 0; 296 297 btstack_linked_item_t *it; 298 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 299 hci_connection_t * connection = (hci_connection_t *) it; 300 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 301 num_packets_sent_classic += connection->num_acl_packets_sent; 302 } else { 303 num_packets_sent_le += connection->num_acl_packets_sent; 304 } 305 } 306 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 307 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 308 int free_slots_le = 0; 309 310 if (free_slots_classic < 0){ 311 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); 312 return 0; 313 } 314 315 if (hci_stack->le_acl_packets_total_num){ 316 // if we have LE slots, they are used 317 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 318 if (free_slots_le < 0){ 319 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); 320 return 0; 321 } 322 } else { 323 // otherwise, classic slots are used for LE, too 324 free_slots_classic -= num_packets_sent_le; 325 if (free_slots_classic < 0){ 326 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); 327 return 0; 328 } 329 } 330 331 switch (address_type){ 332 case BD_ADDR_TYPE_UNKNOWN: 333 log_error("hci_number_free_acl_slots: unknown address type"); 334 return 0; 335 336 case BD_ADDR_TYPE_CLASSIC: 337 return free_slots_classic; 338 339 default: 340 if (hci_stack->le_acl_packets_total_num){ 341 return free_slots_le; 342 } 343 return free_slots_classic; 344 } 345 } 346 347 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 348 // get connection type 349 hci_connection_t * connection = hci_connection_for_handle(con_handle); 350 if (!connection){ 351 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 352 return 0; 353 } 354 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 355 } 356 357 static int hci_number_free_sco_slots(void){ 358 int num_sco_packets_sent = 0; 359 btstack_linked_item_t *it; 360 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 361 hci_connection_t * connection = (hci_connection_t *) it; 362 num_sco_packets_sent += connection->num_sco_packets_sent; 363 } 364 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 365 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 366 return 0; 367 } 368 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 369 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 370 } 371 372 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 373 int hci_can_send_command_packet_now(void){ 374 if (hci_stack->hci_packet_buffer_reserved) return 0; 375 376 // check for async hci transport implementations 377 if (hci_stack->hci_transport->can_send_packet_now){ 378 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 379 return 0; 380 } 381 } 382 383 return hci_stack->num_cmd_packets > 0; 384 } 385 386 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 387 // check for async hci transport implementations 388 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 389 return hci_stack->hci_transport->can_send_packet_now(packet_type); 390 } 391 392 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 393 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 394 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 395 } 396 397 int hci_can_send_acl_classic_packet_now(void){ 398 if (hci_stack->hci_packet_buffer_reserved) return 0; 399 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 400 } 401 402 int hci_can_send_acl_le_packet_now(void){ 403 if (hci_stack->hci_packet_buffer_reserved) return 0; 404 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 405 } 406 407 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 408 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 409 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 410 } 411 412 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 413 if (hci_stack->hci_packet_buffer_reserved) return 0; 414 return hci_can_send_prepared_acl_packet_now(con_handle); 415 } 416 417 int hci_can_send_prepared_sco_packet_now(void){ 418 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 419 if (!hci_stack->synchronous_flow_control_enabled) return 1; 420 return hci_number_free_sco_slots() > 0; 421 } 422 423 int hci_can_send_sco_packet_now(void){ 424 if (hci_stack->hci_packet_buffer_reserved) return 0; 425 return hci_can_send_prepared_sco_packet_now(); 426 } 427 428 void hci_request_sco_can_send_now_event(void){ 429 hci_stack->sco_waiting_for_can_send_now = 1; 430 hci_notify_if_sco_can_send_now(); 431 } 432 433 // used for internal checks in l2cap.c 434 int hci_is_packet_buffer_reserved(void){ 435 return hci_stack->hci_packet_buffer_reserved; 436 } 437 438 // reserves outgoing packet buffer. @returns 1 if successful 439 int hci_reserve_packet_buffer(void){ 440 if (hci_stack->hci_packet_buffer_reserved) { 441 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 442 return 0; 443 } 444 hci_stack->hci_packet_buffer_reserved = 1; 445 return 1; 446 } 447 448 void hci_release_packet_buffer(void){ 449 hci_stack->hci_packet_buffer_reserved = 0; 450 } 451 452 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 453 static int hci_transport_synchronous(void){ 454 return hci_stack->hci_transport->can_send_packet_now == NULL; 455 } 456 457 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 458 459 // 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); 460 461 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 462 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 463 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 464 max_acl_data_packet_length = hci_stack->le_data_packets_length; 465 } 466 467 // testing: reduce buffer to minimum 468 // max_acl_data_packet_length = 52; 469 470 log_debug("hci_send_acl_packet_fragments entered"); 471 472 int err; 473 // multiple packets could be send on a synchronous HCI transport 474 while (1){ 475 476 log_debug("hci_send_acl_packet_fragments loop entered"); 477 478 // get current data 479 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 480 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 481 int more_fragments = 0; 482 483 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 484 if (current_acl_data_packet_length > max_acl_data_packet_length){ 485 more_fragments = 1; 486 current_acl_data_packet_length = max_acl_data_packet_length; 487 } 488 489 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 490 if (acl_header_pos > 0){ 491 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 492 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 493 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 494 } 495 496 // update header len 497 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 498 499 // count packet 500 connection->num_acl_packets_sent++; 501 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %u)", more_fragments); 502 503 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 504 if (more_fragments){ 505 // update start of next fragment to send 506 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 507 } else { 508 // done 509 hci_stack->acl_fragmentation_pos = 0; 510 hci_stack->acl_fragmentation_total_size = 0; 511 } 512 513 // send packet 514 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 515 const int size = current_acl_data_packet_length + 4; 516 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 517 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 518 519 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %u)", more_fragments); 520 521 // done yet? 522 if (!more_fragments) break; 523 524 // can send more? 525 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 526 } 527 528 log_debug("hci_send_acl_packet_fragments loop over"); 529 530 // release buffer now for synchronous transport 531 if (hci_transport_synchronous()){ 532 hci_release_packet_buffer(); 533 // notify upper stack that it might be possible to send again 534 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 535 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 536 } 537 538 return err; 539 } 540 541 // pre: caller has reserved the packet buffer 542 int hci_send_acl_packet_buffer(int size){ 543 544 // log_info("hci_send_acl_packet_buffer size %u", size); 545 546 if (!hci_stack->hci_packet_buffer_reserved) { 547 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 548 return 0; 549 } 550 551 uint8_t * packet = hci_stack->hci_packet_buffer; 552 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 553 554 // check for free places on Bluetooth module 555 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 556 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 557 hci_release_packet_buffer(); 558 return BTSTACK_ACL_BUFFERS_FULL; 559 } 560 561 hci_connection_t *connection = hci_connection_for_handle( con_handle); 562 if (!connection) { 563 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 564 hci_release_packet_buffer(); 565 return 0; 566 } 567 hci_connection_timestamp(connection); 568 569 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 570 571 // setup data 572 hci_stack->acl_fragmentation_total_size = size; 573 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 574 575 return hci_send_acl_packet_fragments(connection); 576 } 577 578 // pre: caller has reserved the packet buffer 579 int hci_send_sco_packet_buffer(int size){ 580 581 // log_info("hci_send_acl_packet_buffer size %u", size); 582 583 if (!hci_stack->hci_packet_buffer_reserved) { 584 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 585 return 0; 586 } 587 588 uint8_t * packet = hci_stack->hci_packet_buffer; 589 590 // skip checks in loopback mode 591 if (!hci_stack->loopback_mode){ 592 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 593 594 // check for free places on Bluetooth module 595 if (!hci_can_send_prepared_sco_packet_now()) { 596 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 597 hci_release_packet_buffer(); 598 return BTSTACK_ACL_BUFFERS_FULL; 599 } 600 601 // track send packet in connection struct 602 hci_connection_t *connection = hci_connection_for_handle( con_handle); 603 if (!connection) { 604 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 605 hci_release_packet_buffer(); 606 return 0; 607 } 608 connection->num_sco_packets_sent++; 609 } 610 611 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 612 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 613 614 if (hci_transport_synchronous()){ 615 hci_release_packet_buffer(); 616 // notify upper stack that it might be possible to send again 617 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 618 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 619 } 620 621 return err; 622 } 623 624 static void acl_handler(uint8_t *packet, int size){ 625 626 // log_info("acl_handler: size %u", size); 627 628 // get info 629 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 630 hci_connection_t *conn = hci_connection_for_handle(con_handle); 631 uint8_t acl_flags = READ_ACL_FLAGS(packet); 632 uint16_t acl_length = READ_ACL_LENGTH(packet); 633 634 // ignore non-registered handle 635 if (!conn){ 636 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 637 return; 638 } 639 640 // assert packet is complete 641 if (acl_length + 4 != size){ 642 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 643 return; 644 } 645 646 // update idle timestamp 647 hci_connection_timestamp(conn); 648 649 // handle different packet types 650 switch (acl_flags & 0x03) { 651 652 case 0x01: // continuation fragment 653 654 // sanity checks 655 if (conn->acl_recombination_pos == 0) { 656 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 657 return; 658 } 659 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 660 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 661 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 662 conn->acl_recombination_pos = 0; 663 return; 664 } 665 666 // append fragment payload (header already stored) 667 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 668 conn->acl_recombination_pos += acl_length; 669 670 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 671 // conn->acl_recombination_pos, conn->acl_recombination_length); 672 673 // forward complete L2CAP packet if complete. 674 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 675 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 676 // reset recombination buffer 677 conn->acl_recombination_length = 0; 678 conn->acl_recombination_pos = 0; 679 } 680 break; 681 682 case 0x02: { // first fragment 683 684 // sanity check 685 if (conn->acl_recombination_pos) { 686 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 687 conn->acl_recombination_pos = 0; 688 } 689 690 // peek into L2CAP packet! 691 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 692 693 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 694 695 // compare fragment size to L2CAP packet size 696 if (acl_length >= l2cap_length + 4){ 697 // forward fragment as L2CAP packet 698 hci_emit_acl_packet(packet, acl_length + 4); 699 } else { 700 701 if (acl_length > HCI_ACL_BUFFER_SIZE){ 702 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 703 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 704 return; 705 } 706 707 // store first fragment and tweak acl length for complete package 708 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 709 conn->acl_recombination_pos = acl_length + 4; 710 conn->acl_recombination_length = l2cap_length; 711 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 712 } 713 break; 714 715 } 716 default: 717 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 718 return; 719 } 720 721 // execute main loop 722 hci_run(); 723 } 724 725 static void hci_shutdown_connection(hci_connection_t *conn){ 726 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 727 728 btstack_run_loop_remove_timer(&conn->timeout); 729 730 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 731 btstack_memory_hci_connection_free( conn ); 732 733 // now it's gone 734 hci_emit_nr_connections_changed(); 735 } 736 737 static const uint16_t packet_type_sizes[] = { 738 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 739 HCI_ACL_DH1_SIZE, 0, 0, 0, 740 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 741 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 742 }; 743 static const uint8_t packet_type_feature_requirement_bit[] = { 744 0, // 3 slot packets 745 1, // 5 slot packets 746 25, // EDR 2 mpbs 747 26, // EDR 3 mbps 748 39, // 3 slot EDR packts 749 40, // 5 slot EDR packet 750 }; 751 static const uint16_t packet_type_feature_packet_mask[] = { 752 0x0f00, // 3 slot packets 753 0xf000, // 5 slot packets 754 0x1102, // EDR 2 mpbs 755 0x2204, // EDR 3 mbps 756 0x0300, // 3 slot EDR packts 757 0x3000, // 5 slot EDR packet 758 }; 759 760 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 761 // enable packet types based on size 762 uint16_t packet_types = 0; 763 unsigned int i; 764 for (i=0;i<16;i++){ 765 if (packet_type_sizes[i] == 0) continue; 766 if (packet_type_sizes[i] <= buffer_size){ 767 packet_types |= 1 << i; 768 } 769 } 770 // disable packet types due to missing local supported features 771 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 772 int bit_idx = packet_type_feature_requirement_bit[i]; 773 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 774 if (feature_set) continue; 775 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 776 packet_types &= ~packet_type_feature_packet_mask[i]; 777 } 778 // flip bits for "may not be used" 779 packet_types ^= 0x3306; 780 return packet_types; 781 } 782 783 uint16_t hci_usable_acl_packet_types(void){ 784 return hci_stack->packet_types; 785 } 786 787 uint8_t* hci_get_outgoing_packet_buffer(void){ 788 // hci packet buffer is >= acl data packet length 789 return hci_stack->hci_packet_buffer; 790 } 791 792 uint16_t hci_max_acl_data_packet_length(void){ 793 return hci_stack->acl_data_packet_length; 794 } 795 796 int hci_non_flushable_packet_boundary_flag_supported(void){ 797 // No. 54, byte 6, bit 6 798 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 799 } 800 801 static int gap_ssp_supported(void){ 802 // No. 51, byte 6, bit 3 803 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 804 } 805 806 static int hci_classic_supported(void){ 807 // No. 37, byte 4, bit 5, = No BR/EDR Support 808 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 809 } 810 811 static int hci_le_supported(void){ 812 #ifdef ENABLE_BLE 813 // No. 37, byte 4, bit 6 = LE Supported (Controller) 814 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 815 #else 816 return 0; 817 #endif 818 } 819 820 // get addr type and address used in advertisement packets 821 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 822 *addr_type = hci_stack->adv_addr_type; 823 if (hci_stack->adv_addr_type){ 824 memcpy(addr, hci_stack->adv_address, 6); 825 } else { 826 memcpy(addr, hci_stack->local_bd_addr, 6); 827 } 828 } 829 830 #ifdef ENABLE_BLE 831 void le_handle_advertisement_report(uint8_t *packet, int size){ 832 int offset = 3; 833 int num_reports = packet[offset]; 834 offset += 1; 835 836 int i; 837 // log_info("HCI: handle adv report with num reports: %d", num_reports); 838 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 839 for (i=0; i<num_reports;i++){ 840 uint8_t data_length = packet[offset + 8]; 841 uint8_t event_size = 10 + data_length; 842 int pos = 0; 843 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 844 event[pos++] = event_size; 845 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 846 offset += 8; 847 pos += 8; 848 event[pos++] = packet[offset + 1 + data_length]; // rssi 849 event[pos++] = packet[offset++]; //data_length; 850 memcpy(&event[pos], &packet[offset], data_length); 851 pos += data_length; 852 offset += data_length + 1; // rssi 853 hci_emit_event(event, pos, 1); 854 } 855 } 856 #endif 857 858 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 859 if (!hci_stack->config) return 0; 860 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 861 // Limit baud rate for Broadcom chipsets to 3 mbps 862 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 863 baud_rate = 3000000; 864 } 865 return baud_rate; 866 } 867 868 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 869 switch (hci_stack->substate){ 870 case HCI_INIT_W4_SEND_RESET: 871 log_info("Resend HCI Reset"); 872 hci_stack->substate = HCI_INIT_SEND_RESET; 873 hci_stack->num_cmd_packets = 1; 874 hci_run(); 875 break; 876 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 877 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 878 if (hci_stack->hci_transport->reset_link){ 879 hci_stack->hci_transport->reset_link(); 880 } 881 // NOTE: explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 882 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 883 log_info("Resend HCI Reset - CSR Warm Boot"); 884 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 885 hci_stack->num_cmd_packets = 1; 886 hci_run(); 887 break; 888 case HCI_INIT_W4_SEND_BAUD_CHANGE: 889 if (hci_stack->hci_transport->set_baudrate){ 890 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 891 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 892 hci_stack->hci_transport->set_baudrate(baud_rate); 893 } 894 // For CSR, HCI Reset is sent on new baud rate 895 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 896 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 897 hci_run(); 898 } 899 break; 900 default: 901 break; 902 } 903 } 904 905 static void hci_initializing_next_state(void){ 906 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 907 } 908 909 // assumption: hci_can_send_command_packet_now() == true 910 static void hci_initializing_run(void){ 911 log_info("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 912 switch (hci_stack->substate){ 913 case HCI_INIT_SEND_RESET: 914 hci_state_reset(); 915 916 #ifndef HAVE_PLATFORM_IPHONE_OS 917 // prepare reset if command complete not received in 100ms 918 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 919 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 920 btstack_run_loop_add_timer(&hci_stack->timeout); 921 #endif 922 // send command 923 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 924 hci_send_cmd(&hci_reset); 925 break; 926 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 927 hci_send_cmd(&hci_read_local_version_information); 928 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 929 break; 930 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 931 hci_state_reset(); 932 // prepare reset if command complete not received in 100ms 933 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 934 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 935 btstack_run_loop_add_timer(&hci_stack->timeout); 936 // send command 937 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 938 hci_send_cmd(&hci_reset); 939 break; 940 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 941 hci_state_reset(); 942 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 943 hci_send_cmd(&hci_reset); 944 break; 945 case HCI_INIT_SEND_BAUD_CHANGE: { 946 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 947 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 948 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 949 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 950 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 951 // STLC25000D: baudrate change happens within 0.5 s after command was send, 952 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 953 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 954 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 955 btstack_run_loop_add_timer(&hci_stack->timeout); 956 } 957 break; 958 } 959 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 960 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 961 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 962 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 963 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 964 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 965 break; 966 } 967 case HCI_INIT_CUSTOM_INIT: 968 log_info("Custom init"); 969 // Custom initialization 970 if (hci_stack->chipset && hci_stack->chipset->next_command){ 971 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 972 if (valid_cmd){ 973 int size = 3 + hci_stack->hci_packet_buffer[2]; 974 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 975 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 976 switch (valid_cmd) { 977 case 1: 978 default: 979 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 980 break; 981 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 982 log_info("CSR Warm Boot"); 983 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 984 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 985 btstack_run_loop_add_timer(&hci_stack->timeout); 986 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 987 && hci_stack->config 988 && hci_stack->chipset 989 // && hci_stack->chipset->set_baudrate_command -- there's no such command 990 && hci_stack->hci_transport->set_baudrate 991 && hci_transport_uart_get_main_baud_rate()){ 992 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 993 } else { 994 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 995 } 996 break; 997 } 998 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 999 break; 1000 } 1001 log_info("hci_run: init script done"); 1002 1003 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1004 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1005 int need_baud_change = hci_stack->config 1006 && hci_stack->chipset 1007 && hci_stack->chipset->set_baudrate_command 1008 && hci_stack->hci_transport->set_baudrate 1009 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1010 if (need_baud_change) { 1011 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1012 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1013 hci_stack->hci_transport->set_baudrate(baud_rate); 1014 } 1015 } 1016 } 1017 // otherwise continue 1018 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1019 hci_send_cmd(&hci_read_local_supported_commands); 1020 break; 1021 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1022 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1023 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1024 hci_send_cmd(&hci_read_local_supported_commands); 1025 break; 1026 case HCI_INIT_SET_BD_ADDR: 1027 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1028 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1029 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1030 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1031 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1032 break; 1033 case HCI_INIT_READ_BD_ADDR: 1034 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1035 hci_send_cmd(&hci_read_bd_addr); 1036 break; 1037 case HCI_INIT_READ_BUFFER_SIZE: 1038 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1039 hci_send_cmd(&hci_read_buffer_size); 1040 break; 1041 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1042 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1043 hci_send_cmd(&hci_read_local_supported_features); 1044 break; 1045 case HCI_INIT_SET_EVENT_MASK: 1046 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1047 if (hci_le_supported()){ 1048 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1049 } else { 1050 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1051 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1052 } 1053 break; 1054 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1055 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1056 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1057 break; 1058 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1059 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1060 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1061 break; 1062 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1063 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1064 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1065 break; 1066 case HCI_INIT_WRITE_LOCAL_NAME: 1067 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1068 if (hci_stack->local_name){ 1069 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1070 } else { 1071 char local_name[8+17+1]; 1072 // BTstack 11:22:33:44:55:66 1073 memcpy(local_name, "BTstack ", 8); 1074 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1075 local_name[8+17] = '\0'; 1076 log_info("---> Name %s", local_name); 1077 hci_send_cmd(&hci_write_local_name, local_name); 1078 } 1079 break; 1080 case HCI_INIT_WRITE_SCAN_ENABLE: 1081 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1082 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1083 break; 1084 // only sent if ENABLE_SCO_OVER_HCI is defined 1085 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1086 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1087 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1088 break; 1089 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1090 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1091 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1092 break; 1093 #ifdef ENABLE_BLE 1094 // LE INIT 1095 case HCI_INIT_LE_READ_BUFFER_SIZE: 1096 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1097 hci_send_cmd(&hci_le_read_buffer_size); 1098 break; 1099 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1100 // LE Supported Host = 1, Simultaneous Host = 0 1101 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1102 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1103 break; 1104 case HCI_INIT_READ_WHITE_LIST_SIZE: 1105 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1106 hci_send_cmd(&hci_le_read_white_list_size); 1107 break; 1108 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1109 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1110 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1111 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1112 break; 1113 #endif 1114 default: 1115 return; 1116 } 1117 } 1118 1119 static void hci_init_done(void){ 1120 // done. tell the app 1121 log_info("hci_init_done -> HCI_STATE_WORKING"); 1122 hci_stack->state = HCI_STATE_WORKING; 1123 hci_emit_state(); 1124 hci_run(); 1125 } 1126 1127 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1128 uint8_t command_completed = 0; 1129 1130 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1131 uint16_t opcode = little_endian_read_16(packet,3); 1132 if (opcode == hci_stack->last_cmd_opcode){ 1133 command_completed = 1; 1134 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1135 } else { 1136 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1137 } 1138 } 1139 1140 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1141 uint8_t status = packet[2]; 1142 uint16_t opcode = little_endian_read_16(packet,4); 1143 if (opcode == hci_stack->last_cmd_opcode){ 1144 if (status){ 1145 command_completed = 1; 1146 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1147 } else { 1148 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1149 } 1150 } else { 1151 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1152 } 1153 } 1154 1155 // Vendor == CSR 1156 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1157 // TODO: track actual command 1158 command_completed = 1; 1159 } 1160 1161 // Vendor == Toshiba 1162 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1163 // TODO: track actual command 1164 command_completed = 1; 1165 } 1166 1167 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1168 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1169 // 1170 // HCI Reset 1171 // Timeout 100 ms 1172 // HCI Reset 1173 // Command Complete Reset 1174 // HCI Read Local Version Information 1175 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1176 // hang... 1177 // 1178 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1179 if (!command_completed 1180 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1181 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1182 1183 uint16_t opcode = little_endian_read_16(packet,3); 1184 if (opcode == hci_reset.opcode){ 1185 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1186 return; 1187 } 1188 } 1189 1190 // CSR & H5 1191 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1192 if (!command_completed 1193 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1194 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1195 1196 uint16_t opcode = little_endian_read_16(packet,3); 1197 if (opcode == hci_reset.opcode){ 1198 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1199 return; 1200 } 1201 } 1202 1203 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1204 // fix: Correct substate and behave as command below 1205 if (command_completed){ 1206 switch (hci_stack->substate){ 1207 case HCI_INIT_SEND_RESET: 1208 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1209 break; 1210 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1211 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1212 break; 1213 default: 1214 break; 1215 } 1216 } 1217 1218 1219 if (!command_completed) return; 1220 1221 int need_baud_change = hci_stack->config 1222 && hci_stack->chipset 1223 && hci_stack->chipset->set_baudrate_command 1224 && hci_stack->hci_transport->set_baudrate 1225 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1226 1227 int need_addr_change = hci_stack->custom_bd_addr_set 1228 && hci_stack->chipset 1229 && hci_stack->chipset->set_bd_addr_command; 1230 1231 switch(hci_stack->substate){ 1232 case HCI_INIT_SEND_RESET: 1233 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1234 // fix: just correct substate and behave as command below 1235 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1236 btstack_run_loop_remove_timer(&hci_stack->timeout); 1237 break; 1238 case HCI_INIT_W4_SEND_RESET: 1239 btstack_run_loop_remove_timer(&hci_stack->timeout); 1240 break; 1241 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1242 log_info("Received local version info, need baud change %u", need_baud_change); 1243 if (need_baud_change){ 1244 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1245 return; 1246 } 1247 // skip baud change 1248 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1249 return; 1250 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1251 // for STLC2500D, baud rate change already happened. 1252 // for others, baud rate gets changed now 1253 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1254 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1255 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1256 hci_stack->hci_transport->set_baudrate(baud_rate); 1257 } 1258 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1259 return; 1260 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1261 btstack_run_loop_remove_timer(&hci_stack->timeout); 1262 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1263 return; 1264 case HCI_INIT_W4_CUSTOM_INIT: 1265 // repeat custom init 1266 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1267 return; 1268 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1269 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1270 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1271 return; 1272 } 1273 if (need_addr_change){ 1274 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1275 return; 1276 } 1277 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1278 return; 1279 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1280 if (need_baud_change){ 1281 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1282 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1283 hci_stack->hci_transport->set_baudrate(baud_rate); 1284 } 1285 if (need_addr_change){ 1286 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1287 return; 1288 } 1289 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1290 return; 1291 case HCI_INIT_W4_SET_BD_ADDR: 1292 // for STLC2500D, bd addr change only gets active after sending reset command 1293 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1294 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1295 return; 1296 } 1297 // skipping st warm boot 1298 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1299 return; 1300 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1301 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1302 return; 1303 case HCI_INIT_W4_READ_BD_ADDR: 1304 // only read buffer size if supported 1305 if (hci_stack->local_supported_commands[0] & 0x01) { 1306 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1307 return; 1308 } 1309 // skipping read buffer size 1310 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1311 return; 1312 case HCI_INIT_W4_SET_EVENT_MASK: 1313 // skip Classic init commands for LE only chipsets 1314 if (!hci_classic_supported()){ 1315 if (hci_le_supported()){ 1316 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1317 return; 1318 } else { 1319 log_error("Neither BR/EDR nor LE supported"); 1320 hci_init_done(); 1321 return; 1322 } 1323 } 1324 if (!gap_ssp_supported()){ 1325 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1326 return; 1327 } 1328 break; 1329 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1330 break; 1331 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1332 // skip write le host if not supported (e.g. on LE only EM9301) 1333 if (hci_stack->local_supported_commands[0] & 0x02) break; 1334 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1335 return; 1336 1337 #ifdef ENABLE_SCO_OVER_HCI 1338 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1339 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1340 break; 1341 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1342 if (!hci_le_supported()){ 1343 // SKIP LE init for Classic only configuration 1344 hci_init_done(); 1345 return; 1346 } 1347 break; 1348 #else 1349 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1350 if (!hci_le_supported()){ 1351 // SKIP LE init for Classic only configuration 1352 hci_init_done(); 1353 return; 1354 } 1355 #endif 1356 break; 1357 // Response to command before init done state -> init done 1358 case (HCI_INIT_DONE-1): 1359 hci_init_done(); 1360 return; 1361 1362 default: 1363 break; 1364 } 1365 hci_initializing_next_state(); 1366 } 1367 1368 static void event_handler(uint8_t *packet, int size){ 1369 1370 uint16_t event_length = packet[1]; 1371 1372 // assert packet is complete 1373 if (size != event_length + 2){ 1374 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1375 return; 1376 } 1377 1378 bd_addr_t addr; 1379 bd_addr_type_t addr_type; 1380 uint8_t link_type; 1381 hci_con_handle_t handle; 1382 hci_connection_t * conn; 1383 int i; 1384 1385 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1386 1387 switch (hci_event_packet_get_type(packet)) { 1388 1389 case HCI_EVENT_COMMAND_COMPLETE: 1390 // get num cmd packets 1391 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1392 hci_stack->num_cmd_packets = packet[2]; 1393 1394 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1395 // from offset 5 1396 // status 1397 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1398 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1399 hci_stack->sco_data_packet_length = packet[8]; 1400 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1401 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1402 1403 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1404 // determine usable ACL payload size 1405 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1406 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1407 } 1408 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1409 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1410 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1411 } 1412 } 1413 #ifdef ENABLE_BLE 1414 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1415 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1416 hci_stack->le_acl_packets_total_num = packet[8]; 1417 // determine usable ACL payload size 1418 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1419 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1420 } 1421 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1422 } 1423 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1424 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1425 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1426 } 1427 #endif 1428 // Dump local address 1429 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1430 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1431 hci_stack->local_bd_addr); 1432 log_info("Local Address, Status: 0x%02x: Addr: %s", 1433 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1434 if (hci_stack->link_key_db){ 1435 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1436 } 1437 } 1438 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1439 hci_emit_discoverable_enabled(hci_stack->discoverable); 1440 } 1441 // Note: HCI init checks 1442 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1443 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1444 1445 // determine usable ACL packet types based on host buffer size and supported features 1446 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1447 log_info("packet types %04x", hci_stack->packet_types); 1448 1449 // Classic/LE 1450 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1451 } 1452 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1453 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1454 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1455 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1456 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1457 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1458 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1459 // notify app 1460 if (hci_stack->local_version_information_callback){ 1461 hci_stack->local_version_information_callback(packet); 1462 } 1463 } 1464 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1465 hci_stack->local_supported_commands[0] = 1466 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1467 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1468 } 1469 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1470 if (packet[5] == 0){ 1471 hci_stack->synchronous_flow_control_enabled = 1; 1472 } 1473 } 1474 break; 1475 1476 case HCI_EVENT_COMMAND_STATUS: 1477 // get num cmd packets 1478 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1479 hci_stack->num_cmd_packets = packet[3]; 1480 break; 1481 1482 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1483 int offset = 3; 1484 for (i=0; i<packet[2];i++){ 1485 handle = little_endian_read_16(packet, offset); 1486 offset += 2; 1487 uint16_t num_packets = little_endian_read_16(packet, offset); 1488 offset += 2; 1489 1490 conn = hci_connection_for_handle(handle); 1491 if (!conn){ 1492 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1493 continue; 1494 } 1495 1496 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1497 if (conn->num_sco_packets_sent >= num_packets){ 1498 conn->num_sco_packets_sent -= num_packets; 1499 } else { 1500 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1501 conn->num_sco_packets_sent = 0; 1502 } 1503 hci_notify_if_sco_can_send_now(); 1504 } else { 1505 if (conn->num_acl_packets_sent >= num_packets){ 1506 conn->num_acl_packets_sent -= num_packets; 1507 } else { 1508 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1509 conn->num_acl_packets_sent = 0; 1510 } 1511 } 1512 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1513 } 1514 break; 1515 } 1516 case HCI_EVENT_CONNECTION_REQUEST: 1517 reverse_bd_addr(&packet[2], addr); 1518 // TODO: eval COD 8-10 1519 link_type = packet[11]; 1520 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1521 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1522 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1523 if (!conn) { 1524 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1525 } 1526 if (!conn) { 1527 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1528 hci_stack->decline_reason = 0x0d; 1529 bd_addr_copy(hci_stack->decline_addr, addr); 1530 break; 1531 } 1532 conn->role = HCI_ROLE_SLAVE; 1533 conn->state = RECEIVED_CONNECTION_REQUEST; 1534 // store info about eSCO 1535 if (link_type == 0x02){ 1536 conn->remote_supported_feature_eSCO = 1; 1537 } 1538 hci_run(); 1539 break; 1540 1541 case HCI_EVENT_CONNECTION_COMPLETE: 1542 // Connection management 1543 reverse_bd_addr(&packet[5], addr); 1544 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1545 addr_type = BD_ADDR_TYPE_CLASSIC; 1546 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1547 if (conn) { 1548 if (!packet[2]){ 1549 conn->state = OPEN; 1550 conn->con_handle = little_endian_read_16(packet, 3); 1551 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1552 1553 // restart timer 1554 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1555 btstack_run_loop_add_timer(&conn->timeout); 1556 1557 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1558 1559 hci_emit_nr_connections_changed(); 1560 } else { 1561 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1562 uint8_t status = packet[2]; 1563 bd_addr_t bd_address; 1564 memcpy(&bd_address, conn->address, 6); 1565 1566 // connection failed, remove entry 1567 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1568 btstack_memory_hci_connection_free( conn ); 1569 1570 // notify client if dedicated bonding 1571 if (notify_dedicated_bonding_failed){ 1572 log_info("hci notify_dedicated_bonding_failed"); 1573 hci_emit_dedicated_bonding_result(bd_address, status); 1574 } 1575 1576 // if authentication error, also delete link key 1577 if (packet[2] == 0x05) { 1578 gap_drop_link_key_for_bd_addr(addr); 1579 } 1580 } 1581 } 1582 break; 1583 1584 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1585 reverse_bd_addr(&packet[5], addr); 1586 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1587 if (packet[2]){ 1588 // connection failed 1589 break; 1590 } 1591 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1592 if (!conn) { 1593 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1594 } 1595 if (!conn) { 1596 break; 1597 } 1598 conn->state = OPEN; 1599 conn->con_handle = little_endian_read_16(packet, 3); 1600 break; 1601 1602 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1603 handle = little_endian_read_16(packet, 3); 1604 conn = hci_connection_for_handle(handle); 1605 if (!conn) break; 1606 if (!packet[2]){ 1607 uint8_t * features = &packet[5]; 1608 if (features[6] & (1 << 3)){ 1609 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1610 } 1611 if (features[3] & (1<<7)){ 1612 conn->remote_supported_feature_eSCO = 1; 1613 } 1614 } 1615 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1616 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1617 if (conn->bonding_flags & BONDING_DEDICATED){ 1618 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1619 } 1620 break; 1621 1622 case HCI_EVENT_LINK_KEY_REQUEST: 1623 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1624 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1625 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1626 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1627 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1628 hci_run(); 1629 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1630 return; 1631 1632 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1633 reverse_bd_addr(&packet[2], addr); 1634 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1635 if (!conn) break; 1636 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1637 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1638 // Change Connection Encryption keeps link key type 1639 if (link_key_type != CHANGED_COMBINATION_KEY){ 1640 conn->link_key_type = link_key_type; 1641 } 1642 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1643 // still forward event to allow dismiss of pairing dialog 1644 break; 1645 } 1646 1647 case HCI_EVENT_PIN_CODE_REQUEST: 1648 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1649 // non-bondable mode: pin code negative reply will be sent 1650 if (!hci_stack->bondable){ 1651 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1652 hci_run(); 1653 return; 1654 } 1655 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1656 if (!hci_stack->link_key_db) break; 1657 hci_event_pin_code_request_get_bd_addr(packet, addr); 1658 hci_stack->link_key_db->delete_link_key(addr); 1659 break; 1660 1661 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1662 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1663 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1664 break; 1665 1666 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1667 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1668 if (!hci_stack->ssp_auto_accept) break; 1669 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1670 break; 1671 1672 case HCI_EVENT_USER_PASSKEY_REQUEST: 1673 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1674 if (!hci_stack->ssp_auto_accept) break; 1675 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1676 break; 1677 1678 case HCI_EVENT_ENCRYPTION_CHANGE: 1679 handle = little_endian_read_16(packet, 3); 1680 conn = hci_connection_for_handle(handle); 1681 if (!conn) break; 1682 if (packet[2] == 0) { 1683 if (packet[5]){ 1684 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1685 } else { 1686 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1687 } 1688 } 1689 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1690 break; 1691 1692 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1693 handle = little_endian_read_16(packet, 3); 1694 conn = hci_connection_for_handle(handle); 1695 if (!conn) break; 1696 1697 // dedicated bonding: send result and disconnect 1698 if (conn->bonding_flags & BONDING_DEDICATED){ 1699 conn->bonding_flags &= ~BONDING_DEDICATED; 1700 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1701 conn->bonding_status = packet[2]; 1702 break; 1703 } 1704 1705 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1706 // link key sufficient for requested security 1707 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1708 break; 1709 } 1710 // not enough 1711 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1712 break; 1713 1714 // HCI_EVENT_DISCONNECTION_COMPLETE 1715 // has been split, to first notify stack before shutting connection down 1716 // see end of function, too. 1717 case HCI_EVENT_DISCONNECTION_COMPLETE: 1718 if (packet[2]) break; // status != 0 1719 handle = little_endian_read_16(packet, 3); 1720 conn = hci_connection_for_handle(handle); 1721 if (!conn) break; // no conn struct anymore 1722 // re-enable advertisements for le connections if active 1723 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1724 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1725 } 1726 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1727 break; 1728 1729 case HCI_EVENT_HARDWARE_ERROR: 1730 log_error("Hardware Error: 0x%02x", packet[2]); 1731 if (hci_stack->hardware_error_callback){ 1732 (*hci_stack->hardware_error_callback)(packet[2]); 1733 } else { 1734 // if no special requests, just reboot stack 1735 hci_power_control_off(); 1736 hci_power_control_on(); 1737 } 1738 break; 1739 1740 case HCI_EVENT_ROLE_CHANGE: 1741 if (packet[2]) break; // status != 0 1742 handle = little_endian_read_16(packet, 3); 1743 conn = hci_connection_for_handle(handle); 1744 if (!conn) break; // no conn 1745 conn->role = packet[9]; 1746 break; 1747 1748 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1749 // release packet buffer only for asynchronous transport and if there are not further fragements 1750 if (hci_transport_synchronous()) { 1751 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1752 return; // instead of break: to avoid re-entering hci_run() 1753 } 1754 if (hci_stack->acl_fragmentation_total_size) break; 1755 hci_release_packet_buffer(); 1756 1757 // L2CAP receives this event via the hci_emit_event below 1758 1759 // For SCO, we do the can_send_now_check here 1760 hci_notify_if_sco_can_send_now(); 1761 break; 1762 1763 case HCI_EVENT_SCO_CAN_SEND_NOW: 1764 // For SCO, we do the can_send_now_check here 1765 hci_notify_if_sco_can_send_now(); 1766 return; 1767 1768 #ifdef ENABLE_BLE 1769 case HCI_EVENT_LE_META: 1770 switch (packet[2]){ 1771 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1772 // log_info("advertising report received"); 1773 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1774 le_handle_advertisement_report(packet, size); 1775 break; 1776 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1777 // Connection management 1778 reverse_bd_addr(&packet[8], addr); 1779 addr_type = (bd_addr_type_t)packet[7]; 1780 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1781 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1782 // if auto-connect, remove from whitelist in both roles 1783 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1784 hci_remove_from_whitelist(addr_type, addr); 1785 } 1786 // handle error: error is reported only to the initiator -> outgoing connection 1787 if (packet[3]){ 1788 // outgoing connection establishment is done 1789 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1790 // remove entry 1791 if (conn){ 1792 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1793 btstack_memory_hci_connection_free( conn ); 1794 } 1795 break; 1796 } 1797 // on success, both hosts receive connection complete event 1798 if (packet[6] == HCI_ROLE_MASTER){ 1799 // if we're master, it was an outgoing connection and we're done with it 1800 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1801 } else { 1802 // if we're slave, it was an incoming connection, advertisements have stopped 1803 hci_stack->le_advertisements_active = 0; 1804 } 1805 // LE connections are auto-accepted, so just create a connection if there isn't one already 1806 if (!conn){ 1807 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1808 } 1809 // no memory, sorry. 1810 if (!conn){ 1811 break; 1812 } 1813 1814 conn->state = OPEN; 1815 conn->role = packet[6]; 1816 conn->con_handle = little_endian_read_16(packet, 4); 1817 1818 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1819 1820 // restart timer 1821 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1822 // btstack_run_loop_add_timer(&conn->timeout); 1823 1824 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1825 1826 hci_emit_nr_connections_changed(); 1827 break; 1828 1829 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1830 1831 default: 1832 break; 1833 } 1834 break; 1835 #endif 1836 default: 1837 break; 1838 } 1839 1840 // handle BT initialization 1841 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1842 hci_initializing_event_handler(packet, size); 1843 } 1844 1845 // help with BT sleep 1846 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1847 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1848 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1849 hci_initializing_next_state(); 1850 } 1851 1852 // notify upper stack 1853 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1854 1855 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1856 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1857 if (!packet[2]){ 1858 handle = little_endian_read_16(packet, 3); 1859 hci_connection_t * aConn = hci_connection_for_handle(handle); 1860 if (aConn) { 1861 uint8_t status = aConn->bonding_status; 1862 uint16_t flags = aConn->bonding_flags; 1863 bd_addr_t bd_address; 1864 memcpy(&bd_address, aConn->address, 6); 1865 hci_shutdown_connection(aConn); 1866 // connection struct is gone, don't access anymore 1867 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1868 hci_emit_dedicated_bonding_result(bd_address, status); 1869 } 1870 } 1871 } 1872 } 1873 1874 // execute main loop 1875 hci_run(); 1876 } 1877 1878 static void sco_handler(uint8_t * packet, uint16_t size){ 1879 if (!hci_stack->sco_packet_handler) return; 1880 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1881 } 1882 1883 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1884 hci_dump_packet(packet_type, 1, packet, size); 1885 switch (packet_type) { 1886 case HCI_EVENT_PACKET: 1887 event_handler(packet, size); 1888 break; 1889 case HCI_ACL_DATA_PACKET: 1890 acl_handler(packet, size); 1891 break; 1892 case HCI_SCO_DATA_PACKET: 1893 sco_handler(packet, size); 1894 default: 1895 break; 1896 } 1897 } 1898 1899 /** 1900 * @brief Add event packet handler. 1901 */ 1902 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1903 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1904 } 1905 1906 1907 /** Register HCI packet handlers */ 1908 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 1909 hci_stack->acl_packet_handler = handler; 1910 } 1911 1912 /** 1913 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1914 */ 1915 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 1916 hci_stack->sco_packet_handler = handler; 1917 } 1918 1919 static void hci_state_reset(void){ 1920 // no connections yet 1921 hci_stack->connections = NULL; 1922 1923 // keep discoverable/connectable as this has been requested by the client(s) 1924 // hci_stack->discoverable = 0; 1925 // hci_stack->connectable = 0; 1926 // hci_stack->bondable = 1; 1927 1928 // buffer is free 1929 hci_stack->hci_packet_buffer_reserved = 0; 1930 1931 // no pending cmds 1932 hci_stack->decline_reason = 0; 1933 hci_stack->new_scan_enable_value = 0xff; 1934 1935 // LE 1936 hci_stack->adv_addr_type = 0; 1937 memset(hci_stack->adv_address, 0, 6); 1938 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1939 hci_stack->le_scan_type = 0xff; 1940 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1941 hci_stack->le_whitelist = 0; 1942 hci_stack->le_whitelist_capacity = 0; 1943 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1944 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1945 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1946 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1947 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1948 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1949 } 1950 1951 /** 1952 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1953 */ 1954 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1955 // store and open remote device db 1956 hci_stack->link_key_db = link_key_db; 1957 if (hci_stack->link_key_db) { 1958 hci_stack->link_key_db->open(); 1959 } 1960 } 1961 1962 void hci_init(const hci_transport_t *transport, const void *config){ 1963 1964 #ifdef HAVE_MALLOC 1965 if (!hci_stack) { 1966 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1967 } 1968 #else 1969 hci_stack = &hci_stack_static; 1970 #endif 1971 memset(hci_stack, 0, sizeof(hci_stack_t)); 1972 1973 // reference to use transport layer implementation 1974 hci_stack->hci_transport = transport; 1975 1976 // reference to used config 1977 hci_stack->config = config; 1978 1979 // setup pointer for outgoing packet buffer 1980 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 1981 1982 // max acl payload size defined in config.h 1983 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1984 1985 // register packet handlers with transport 1986 transport->register_packet_handler(&packet_handler); 1987 1988 hci_stack->state = HCI_STATE_OFF; 1989 1990 // class of device 1991 hci_stack->class_of_device = 0x007a020c; // Smartphone 1992 1993 // bondable by default 1994 hci_stack->bondable = 1; 1995 1996 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1997 hci_stack->ssp_enable = 1; 1998 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1999 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2000 hci_stack->ssp_auto_accept = 1; 2001 2002 // voice setting - signed 8 bit pcm data with CVSD over the air 2003 hci_stack->sco_voice_setting = 0x40; 2004 2005 hci_state_reset(); 2006 } 2007 2008 /** 2009 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2010 */ 2011 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2012 hci_stack->chipset = chipset_driver; 2013 2014 // reset chipset driver - init is also called on power_up 2015 if (hci_stack->chipset && hci_stack->chipset->init){ 2016 hci_stack->chipset->init(hci_stack->config); 2017 } 2018 } 2019 2020 /** 2021 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2022 */ 2023 void hci_set_control(const btstack_control_t *hardware_control){ 2024 // references to used control implementation 2025 hci_stack->control = hardware_control; 2026 // init with transport config 2027 hardware_control->init(hci_stack->config); 2028 } 2029 2030 void hci_close(void){ 2031 // close remote device db 2032 if (hci_stack->link_key_db) { 2033 hci_stack->link_key_db->close(); 2034 } 2035 2036 btstack_linked_list_iterator_t lit; 2037 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2038 while (btstack_linked_list_iterator_has_next(&lit)){ 2039 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2040 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2041 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2042 hci_shutdown_connection(connection); 2043 } 2044 2045 hci_power_control(HCI_POWER_OFF); 2046 2047 #ifdef HAVE_MALLOC 2048 free(hci_stack); 2049 #endif 2050 hci_stack = NULL; 2051 } 2052 2053 void gap_set_class_of_device(uint32_t class_of_device){ 2054 hci_stack->class_of_device = class_of_device; 2055 } 2056 2057 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2058 void hci_set_bd_addr(bd_addr_t addr){ 2059 memcpy(hci_stack->custom_bd_addr, addr, 6); 2060 hci_stack->custom_bd_addr_set = 1; 2061 } 2062 2063 void hci_disable_l2cap_timeout_check(void){ 2064 disable_l2cap_timeouts = 1; 2065 } 2066 // State-Module-Driver overview 2067 // state module low-level 2068 // HCI_STATE_OFF off close 2069 // HCI_STATE_INITIALIZING, on open 2070 // HCI_STATE_WORKING, on open 2071 // HCI_STATE_HALTING, on open 2072 // HCI_STATE_SLEEPING, off/sleep close 2073 // HCI_STATE_FALLING_ASLEEP on open 2074 2075 static int hci_power_control_on(void){ 2076 2077 // power on 2078 int err = 0; 2079 if (hci_stack->control && hci_stack->control->on){ 2080 err = (*hci_stack->control->on)(); 2081 } 2082 if (err){ 2083 log_error( "POWER_ON failed"); 2084 hci_emit_hci_open_failed(); 2085 return err; 2086 } 2087 2088 // int chipset driver 2089 if (hci_stack->chipset && hci_stack->chipset->init){ 2090 hci_stack->chipset->init(hci_stack->config); 2091 } 2092 2093 // init transport 2094 if (hci_stack->hci_transport->init){ 2095 hci_stack->hci_transport->init(hci_stack->config); 2096 } 2097 2098 // open transport 2099 err = hci_stack->hci_transport->open(); 2100 if (err){ 2101 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2102 if (hci_stack->control && hci_stack->control->off){ 2103 (*hci_stack->control->off)(); 2104 } 2105 hci_emit_hci_open_failed(); 2106 return err; 2107 } 2108 return 0; 2109 } 2110 2111 static void hci_power_control_off(void){ 2112 2113 log_info("hci_power_control_off"); 2114 2115 // close low-level device 2116 hci_stack->hci_transport->close(); 2117 2118 log_info("hci_power_control_off - hci_transport closed"); 2119 2120 // power off 2121 if (hci_stack->control && hci_stack->control->off){ 2122 (*hci_stack->control->off)(); 2123 } 2124 2125 log_info("hci_power_control_off - control closed"); 2126 2127 hci_stack->state = HCI_STATE_OFF; 2128 } 2129 2130 static void hci_power_control_sleep(void){ 2131 2132 log_info("hci_power_control_sleep"); 2133 2134 #if 0 2135 // don't close serial port during sleep 2136 2137 // close low-level device 2138 hci_stack->hci_transport->close(hci_stack->config); 2139 #endif 2140 2141 // sleep mode 2142 if (hci_stack->control && hci_stack->control->sleep){ 2143 (*hci_stack->control->sleep)(); 2144 } 2145 2146 hci_stack->state = HCI_STATE_SLEEPING; 2147 } 2148 2149 static int hci_power_control_wake(void){ 2150 2151 log_info("hci_power_control_wake"); 2152 2153 // wake on 2154 if (hci_stack->control && hci_stack->control->wake){ 2155 (*hci_stack->control->wake)(); 2156 } 2157 2158 #if 0 2159 // open low-level device 2160 int err = hci_stack->hci_transport->open(hci_stack->config); 2161 if (err){ 2162 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2163 if (hci_stack->control && hci_stack->control->off){ 2164 (*hci_stack->control->off)(); 2165 } 2166 hci_emit_hci_open_failed(); 2167 return err; 2168 } 2169 #endif 2170 2171 return 0; 2172 } 2173 2174 static void hci_power_transition_to_initializing(void){ 2175 // set up state machine 2176 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2177 hci_stack->hci_packet_buffer_reserved = 0; 2178 hci_stack->state = HCI_STATE_INITIALIZING; 2179 hci_stack->substate = HCI_INIT_SEND_RESET; 2180 } 2181 2182 int hci_power_control(HCI_POWER_MODE power_mode){ 2183 2184 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2185 2186 int err = 0; 2187 switch (hci_stack->state){ 2188 2189 case HCI_STATE_OFF: 2190 switch (power_mode){ 2191 case HCI_POWER_ON: 2192 err = hci_power_control_on(); 2193 if (err) { 2194 log_error("hci_power_control_on() error %u", err); 2195 return err; 2196 } 2197 hci_power_transition_to_initializing(); 2198 break; 2199 case HCI_POWER_OFF: 2200 // do nothing 2201 break; 2202 case HCI_POWER_SLEEP: 2203 // do nothing (with SLEEP == OFF) 2204 break; 2205 } 2206 break; 2207 2208 case HCI_STATE_INITIALIZING: 2209 switch (power_mode){ 2210 case HCI_POWER_ON: 2211 // do nothing 2212 break; 2213 case HCI_POWER_OFF: 2214 // no connections yet, just turn it off 2215 hci_power_control_off(); 2216 break; 2217 case HCI_POWER_SLEEP: 2218 // no connections yet, just turn it off 2219 hci_power_control_sleep(); 2220 break; 2221 } 2222 break; 2223 2224 case HCI_STATE_WORKING: 2225 switch (power_mode){ 2226 case HCI_POWER_ON: 2227 // do nothing 2228 break; 2229 case HCI_POWER_OFF: 2230 // see hci_run 2231 hci_stack->state = HCI_STATE_HALTING; 2232 break; 2233 case HCI_POWER_SLEEP: 2234 // see hci_run 2235 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2236 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2237 break; 2238 } 2239 break; 2240 2241 case HCI_STATE_HALTING: 2242 switch (power_mode){ 2243 case HCI_POWER_ON: 2244 hci_power_transition_to_initializing(); 2245 break; 2246 case HCI_POWER_OFF: 2247 // do nothing 2248 break; 2249 case HCI_POWER_SLEEP: 2250 // see hci_run 2251 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2252 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2253 break; 2254 } 2255 break; 2256 2257 case HCI_STATE_FALLING_ASLEEP: 2258 switch (power_mode){ 2259 case HCI_POWER_ON: 2260 2261 #ifdef HAVE_PLATFORM_IPHONE_OS 2262 // nothing to do, if H4 supports power management 2263 if (btstack_control_iphone_power_management_enabled()){ 2264 hci_stack->state = HCI_STATE_INITIALIZING; 2265 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2266 break; 2267 } 2268 #endif 2269 hci_power_transition_to_initializing(); 2270 break; 2271 case HCI_POWER_OFF: 2272 // see hci_run 2273 hci_stack->state = HCI_STATE_HALTING; 2274 break; 2275 case HCI_POWER_SLEEP: 2276 // do nothing 2277 break; 2278 } 2279 break; 2280 2281 case HCI_STATE_SLEEPING: 2282 switch (power_mode){ 2283 case HCI_POWER_ON: 2284 2285 #ifdef HAVE_PLATFORM_IPHONE_OS 2286 // nothing to do, if H4 supports power management 2287 if (btstack_control_iphone_power_management_enabled()){ 2288 hci_stack->state = HCI_STATE_INITIALIZING; 2289 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2290 hci_update_scan_enable(); 2291 break; 2292 } 2293 #endif 2294 err = hci_power_control_wake(); 2295 if (err) return err; 2296 hci_power_transition_to_initializing(); 2297 break; 2298 case HCI_POWER_OFF: 2299 hci_stack->state = HCI_STATE_HALTING; 2300 break; 2301 case HCI_POWER_SLEEP: 2302 // do nothing 2303 break; 2304 } 2305 break; 2306 } 2307 2308 // create internal event 2309 hci_emit_state(); 2310 2311 // trigger next/first action 2312 hci_run(); 2313 2314 return 0; 2315 } 2316 2317 static void hci_update_scan_enable(void){ 2318 // 2 = page scan, 1 = inq scan 2319 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2320 hci_run(); 2321 } 2322 2323 void gap_discoverable_control(uint8_t enable){ 2324 if (enable) enable = 1; // normalize argument 2325 2326 if (hci_stack->discoverable == enable){ 2327 hci_emit_discoverable_enabled(hci_stack->discoverable); 2328 return; 2329 } 2330 2331 hci_stack->discoverable = enable; 2332 hci_update_scan_enable(); 2333 } 2334 2335 void gap_connectable_control(uint8_t enable){ 2336 if (enable) enable = 1; // normalize argument 2337 2338 // don't emit event 2339 if (hci_stack->connectable == enable) return; 2340 2341 hci_stack->connectable = enable; 2342 hci_update_scan_enable(); 2343 } 2344 2345 void gap_local_bd_addr(bd_addr_t address_buffer){ 2346 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2347 } 2348 2349 static void hci_run(void){ 2350 2351 // log_info("hci_run: entered"); 2352 btstack_linked_item_t * it; 2353 2354 // send continuation fragments first, as they block the prepared packet buffer 2355 if (hci_stack->acl_fragmentation_total_size > 0) { 2356 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2357 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2358 if (connection) { 2359 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2360 hci_send_acl_packet_fragments(connection); 2361 return; 2362 } 2363 } else { 2364 // connection gone -> discard further fragments 2365 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2366 hci_stack->acl_fragmentation_total_size = 0; 2367 hci_stack->acl_fragmentation_pos = 0; 2368 } 2369 } 2370 2371 if (!hci_can_send_command_packet_now()) return; 2372 2373 // global/non-connection oriented commands 2374 2375 // decline incoming connections 2376 if (hci_stack->decline_reason){ 2377 uint8_t reason = hci_stack->decline_reason; 2378 hci_stack->decline_reason = 0; 2379 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2380 return; 2381 } 2382 2383 // send scan enable 2384 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2385 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2386 hci_stack->new_scan_enable_value = 0xff; 2387 return; 2388 } 2389 2390 #ifdef ENABLE_BLE 2391 if (hci_stack->state == HCI_STATE_WORKING){ 2392 // handle le scan 2393 switch(hci_stack->le_scanning_state){ 2394 case LE_START_SCAN: 2395 hci_stack->le_scanning_state = LE_SCANNING; 2396 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2397 return; 2398 2399 case LE_STOP_SCAN: 2400 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2401 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2402 return; 2403 default: 2404 break; 2405 } 2406 if (hci_stack->le_scan_type != 0xff){ 2407 // defaults: active scanning, accept all advertisement packets 2408 int scan_type = hci_stack->le_scan_type; 2409 hci_stack->le_scan_type = 0xff; 2410 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); 2411 return; 2412 } 2413 // le advertisement control 2414 if (hci_stack->le_advertisements_todo){ 2415 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2416 } 2417 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2418 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2419 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2420 return; 2421 } 2422 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2423 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2424 hci_send_cmd(&hci_le_set_advertising_parameters, 2425 hci_stack->le_advertisements_interval_min, 2426 hci_stack->le_advertisements_interval_max, 2427 hci_stack->le_advertisements_type, 2428 hci_stack->le_advertisements_own_address_type, 2429 hci_stack->le_advertisements_direct_address_type, 2430 hci_stack->le_advertisements_direct_address, 2431 hci_stack->le_advertisements_channel_map, 2432 hci_stack->le_advertisements_filter_policy); 2433 return; 2434 } 2435 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2436 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2437 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2438 hci_stack->le_advertisements_data); 2439 return; 2440 } 2441 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2442 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2443 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2444 hci_stack->le_scan_response_data); 2445 return; 2446 } 2447 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2448 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2449 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2450 return; 2451 } 2452 2453 // 2454 // LE Whitelist Management 2455 // 2456 2457 // check if whitelist needs modification 2458 btstack_linked_list_iterator_t lit; 2459 int modification_pending = 0; 2460 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2461 while (btstack_linked_list_iterator_has_next(&lit)){ 2462 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2463 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2464 modification_pending = 1; 2465 break; 2466 } 2467 } 2468 2469 if (modification_pending){ 2470 // stop connnecting if modification pending 2471 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2472 hci_send_cmd(&hci_le_create_connection_cancel); 2473 return; 2474 } 2475 2476 // add/remove entries 2477 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2478 while (btstack_linked_list_iterator_has_next(&lit)){ 2479 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2480 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2481 entry->state = LE_WHITELIST_ON_CONTROLLER; 2482 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2483 return; 2484 2485 } 2486 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2487 bd_addr_t address; 2488 bd_addr_type_t address_type = entry->address_type; 2489 memcpy(address, entry->address, 6); 2490 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2491 btstack_memory_whitelist_entry_free(entry); 2492 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2493 return; 2494 } 2495 } 2496 } 2497 2498 // start connecting 2499 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2500 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2501 bd_addr_t null_addr; 2502 memset(null_addr, 0, 6); 2503 hci_send_cmd(&hci_le_create_connection, 2504 0x0060, // scan interval: 60 ms 2505 0x0030, // scan interval: 30 ms 2506 1, // use whitelist 2507 0, // peer address type 2508 null_addr, // peer bd addr 2509 hci_stack->adv_addr_type, // our addr type: 2510 0x0008, // conn interval min 2511 0x0018, // conn interval max 2512 0, // conn latency 2513 0x0048, // supervision timeout 2514 0x0001, // min ce length 2515 0x0001 // max ce length 2516 ); 2517 return; 2518 } 2519 } 2520 #endif 2521 2522 // send pending HCI commands 2523 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2524 hci_connection_t * connection = (hci_connection_t *) it; 2525 2526 switch(connection->state){ 2527 case SEND_CREATE_CONNECTION: 2528 switch(connection->address_type){ 2529 case BD_ADDR_TYPE_CLASSIC: 2530 log_info("sending hci_create_connection"); 2531 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2532 break; 2533 default: 2534 #ifdef ENABLE_BLE 2535 log_info("sending hci_le_create_connection"); 2536 hci_send_cmd(&hci_le_create_connection, 2537 0x0060, // scan interval: 60 ms 2538 0x0030, // scan interval: 30 ms 2539 0, // don't use whitelist 2540 connection->address_type, // peer address type 2541 connection->address, // peer bd addr 2542 hci_stack->adv_addr_type, // our addr type: 2543 0x0008, // conn interval min 2544 0x0018, // conn interval max 2545 0, // conn latency 2546 0x0048, // supervision timeout 2547 0x0001, // min ce length 2548 0x0001 // max ce length 2549 ); 2550 2551 connection->state = SENT_CREATE_CONNECTION; 2552 #endif 2553 break; 2554 } 2555 return; 2556 2557 case RECEIVED_CONNECTION_REQUEST: 2558 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2559 connection->state = ACCEPTED_CONNECTION_REQUEST; 2560 connection->role = HCI_ROLE_SLAVE; 2561 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2562 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2563 } else { 2564 // remote supported feature eSCO is set if link type is eSCO 2565 uint16_t max_latency; 2566 uint8_t retransmission_effort; 2567 uint16_t packet_types; 2568 // remote supported feature eSCO is set if link type is eSCO 2569 if (connection->remote_supported_feature_eSCO){ 2570 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 2571 max_latency = 0x000c; 2572 retransmission_effort = 0x02; 2573 packet_types = 0x388; 2574 } else { 2575 // SCO: max latency, retransmission interval: N/A. any packet type 2576 max_latency = 0xffff; 2577 retransmission_effort = 0xff; 2578 packet_types = 0x003f; 2579 } 2580 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, max_latency, hci_stack->sco_voice_setting, retransmission_effort, packet_types); 2581 } 2582 return; 2583 2584 #ifdef ENABLE_BLE 2585 case SEND_CANCEL_CONNECTION: 2586 connection->state = SENT_CANCEL_CONNECTION; 2587 hci_send_cmd(&hci_le_create_connection_cancel); 2588 return; 2589 #endif 2590 case SEND_DISCONNECT: 2591 connection->state = SENT_DISCONNECT; 2592 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2593 return; 2594 2595 default: 2596 break; 2597 } 2598 2599 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2600 log_info("responding to link key request"); 2601 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2602 link_key_t link_key; 2603 link_key_type_t link_key_type; 2604 if ( hci_stack->link_key_db 2605 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2606 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2607 connection->link_key_type = link_key_type; 2608 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2609 } else { 2610 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2611 } 2612 return; 2613 } 2614 2615 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2616 log_info("denying to pin request"); 2617 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2618 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2619 return; 2620 } 2621 2622 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2623 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2624 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2625 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2626 // tweak authentication requirements 2627 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2628 if (connection->bonding_flags & BONDING_DEDICATED){ 2629 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2630 } 2631 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2632 authreq |= 1; 2633 } 2634 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2635 } else { 2636 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2637 } 2638 return; 2639 } 2640 2641 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2642 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2643 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2644 return; 2645 } 2646 2647 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2648 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2649 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2650 return; 2651 } 2652 2653 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2654 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2655 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2656 return; 2657 } 2658 2659 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2660 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2661 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2662 return; 2663 } 2664 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2665 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2666 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2667 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2668 return; 2669 } 2670 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2671 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2672 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2673 return; 2674 } 2675 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2676 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2677 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2678 return; 2679 } 2680 2681 #ifdef ENABLE_BLE 2682 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2683 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2684 2685 uint16_t connection_interval_min = connection->le_conn_interval_min; 2686 connection->le_conn_interval_min = 0; 2687 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2688 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2689 0x0000, 0xffff); 2690 } 2691 #endif 2692 } 2693 2694 hci_connection_t * connection; 2695 switch (hci_stack->state){ 2696 case HCI_STATE_INITIALIZING: 2697 hci_initializing_run(); 2698 break; 2699 2700 case HCI_STATE_HALTING: 2701 2702 log_info("HCI_STATE_HALTING"); 2703 2704 // free whitelist entries 2705 #ifdef ENABLE_BLE 2706 { 2707 btstack_linked_list_iterator_t lit; 2708 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2709 while (btstack_linked_list_iterator_has_next(&lit)){ 2710 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2711 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2712 btstack_memory_whitelist_entry_free(entry); 2713 } 2714 } 2715 #endif 2716 // close all open connections 2717 connection = (hci_connection_t *) hci_stack->connections; 2718 if (connection){ 2719 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2720 if (!hci_can_send_command_packet_now()) return; 2721 2722 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2723 2724 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2725 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2726 2727 // ... which would be ignored anyway as we shutdown (free) the connection now 2728 hci_shutdown_connection(connection); 2729 2730 // finally, send the disconnect command 2731 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2732 return; 2733 } 2734 log_info("HCI_STATE_HALTING, calling off"); 2735 2736 // switch mode 2737 hci_power_control_off(); 2738 2739 log_info("HCI_STATE_HALTING, emitting state"); 2740 hci_emit_state(); 2741 log_info("HCI_STATE_HALTING, done"); 2742 break; 2743 2744 case HCI_STATE_FALLING_ASLEEP: 2745 switch(hci_stack->substate) { 2746 case HCI_FALLING_ASLEEP_DISCONNECT: 2747 log_info("HCI_STATE_FALLING_ASLEEP"); 2748 // close all open connections 2749 connection = (hci_connection_t *) hci_stack->connections; 2750 2751 #ifdef HAVE_PLATFORM_IPHONE_OS 2752 // don't close connections, if H4 supports power management 2753 if (btstack_control_iphone_power_management_enabled()){ 2754 connection = NULL; 2755 } 2756 #endif 2757 if (connection){ 2758 2759 // send disconnect 2760 if (!hci_can_send_command_packet_now()) return; 2761 2762 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2763 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2764 2765 // send disconnected event right away - causes higher layer connections to get closed, too. 2766 hci_shutdown_connection(connection); 2767 return; 2768 } 2769 2770 if (hci_classic_supported()){ 2771 // disable page and inquiry scan 2772 if (!hci_can_send_command_packet_now()) return; 2773 2774 log_info("HCI_STATE_HALTING, disabling inq scans"); 2775 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2776 2777 // continue in next sub state 2778 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2779 break; 2780 } 2781 // fall through for ble-only chips 2782 2783 case HCI_FALLING_ASLEEP_COMPLETE: 2784 log_info("HCI_STATE_HALTING, calling sleep"); 2785 #ifdef HAVE_PLATFORM_IPHONE_OS 2786 // don't actually go to sleep, if H4 supports power management 2787 if (btstack_control_iphone_power_management_enabled()){ 2788 // SLEEP MODE reached 2789 hci_stack->state = HCI_STATE_SLEEPING; 2790 hci_emit_state(); 2791 break; 2792 } 2793 #endif 2794 // switch mode 2795 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2796 hci_emit_state(); 2797 break; 2798 2799 default: 2800 break; 2801 } 2802 break; 2803 2804 default: 2805 break; 2806 } 2807 } 2808 2809 int hci_send_cmd_packet(uint8_t *packet, int size){ 2810 bd_addr_t addr; 2811 hci_connection_t * conn; 2812 // house-keeping 2813 2814 // create_connection? 2815 if (IS_COMMAND(packet, hci_create_connection)){ 2816 reverse_bd_addr(&packet[3], addr); 2817 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2818 2819 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2820 if (!conn){ 2821 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2822 if (!conn){ 2823 // notify client that alloc failed 2824 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2825 return 0; // don't sent packet to controller 2826 } 2827 conn->state = SEND_CREATE_CONNECTION; 2828 } 2829 log_info("conn state %u", conn->state); 2830 switch (conn->state){ 2831 // if connection active exists 2832 case OPEN: 2833 // and OPEN, emit connection complete command, don't send to controller 2834 hci_emit_connection_complete(addr, conn->con_handle, 0); 2835 return 0; 2836 case SEND_CREATE_CONNECTION: 2837 // connection created by hci, e.g. dedicated bonding 2838 break; 2839 default: 2840 // otherwise, just ignore as it is already in the open process 2841 return 0; 2842 } 2843 conn->state = SENT_CREATE_CONNECTION; 2844 } 2845 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2846 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2847 } 2848 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2849 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2850 } 2851 2852 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2853 if (hci_stack->link_key_db){ 2854 reverse_bd_addr(&packet[3], addr); 2855 hci_stack->link_key_db->delete_link_key(addr); 2856 } 2857 } 2858 2859 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2860 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2861 reverse_bd_addr(&packet[3], addr); 2862 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2863 if (conn){ 2864 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2865 } 2866 } 2867 2868 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2869 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2870 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2871 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2872 reverse_bd_addr(&packet[3], addr); 2873 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2874 if (conn){ 2875 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2876 } 2877 } 2878 2879 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2880 hci_stack->loopback_mode = packet[3]; 2881 } 2882 2883 #ifdef ENABLE_BLE 2884 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2885 hci_stack->adv_addr_type = packet[8]; 2886 } 2887 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2888 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2889 } 2890 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2891 hci_stack->le_advertisements_active = packet[3]; 2892 } 2893 if (IS_COMMAND(packet, hci_le_create_connection)){ 2894 // white list used? 2895 uint8_t initiator_filter_policy = packet[7]; 2896 switch (initiator_filter_policy){ 2897 case 0: 2898 // whitelist not used 2899 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2900 break; 2901 case 1: 2902 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2903 break; 2904 default: 2905 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2906 break; 2907 } 2908 } 2909 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2910 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2911 } 2912 #endif 2913 2914 hci_stack->num_cmd_packets--; 2915 2916 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2917 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2918 2919 // release packet buffer for synchronous transport implementations 2920 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2921 hci_stack->hci_packet_buffer_reserved = 0; 2922 } 2923 2924 return err; 2925 } 2926 2927 // disconnect because of security block 2928 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2929 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2930 if (!connection) return; 2931 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2932 } 2933 2934 2935 // Configure Secure Simple Pairing 2936 2937 // enable will enable SSP during init 2938 void gap_ssp_set_enable(int enable){ 2939 hci_stack->ssp_enable = enable; 2940 } 2941 2942 static int hci_local_ssp_activated(void){ 2943 return gap_ssp_supported() && hci_stack->ssp_enable; 2944 } 2945 2946 // if set, BTstack will respond to io capability request using authentication requirement 2947 void gap_ssp_set_io_capability(int io_capability){ 2948 hci_stack->ssp_io_capability = io_capability; 2949 } 2950 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 2951 hci_stack->ssp_authentication_requirement = authentication_requirement; 2952 } 2953 2954 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2955 void gap_ssp_set_auto_accept(int auto_accept){ 2956 hci_stack->ssp_auto_accept = auto_accept; 2957 } 2958 2959 /** 2960 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2961 */ 2962 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2963 2964 if (!hci_can_send_command_packet_now()){ 2965 log_error("hci_send_cmd called but cannot send packet now"); 2966 return 0; 2967 } 2968 2969 // for HCI INITIALIZATION 2970 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2971 hci_stack->last_cmd_opcode = cmd->opcode; 2972 2973 hci_reserve_packet_buffer(); 2974 uint8_t * packet = hci_stack->hci_packet_buffer; 2975 2976 va_list argptr; 2977 va_start(argptr, cmd); 2978 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 2979 va_end(argptr); 2980 2981 return hci_send_cmd_packet(packet, size); 2982 } 2983 2984 // Create various non-HCI events. 2985 // TODO: generalize, use table similar to hci_create_command 2986 2987 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 2988 // dump packet 2989 if (dump) { 2990 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 2991 } 2992 2993 // dispatch to all event handlers 2994 btstack_linked_list_iterator_t it; 2995 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 2996 while (btstack_linked_list_iterator_has_next(&it)){ 2997 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 2998 entry->callback(HCI_EVENT_PACKET, 0, event, size); 2999 } 3000 } 3001 3002 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3003 if (!hci_stack->acl_packet_handler) return; 3004 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3005 } 3006 3007 static void hci_notify_if_sco_can_send_now(void){ 3008 // notify SCO sender if waiting 3009 if (!hci_stack->sco_waiting_for_can_send_now) return; 3010 if (hci_can_send_sco_packet_now()){ 3011 hci_stack->sco_waiting_for_can_send_now = 0; 3012 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3013 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3014 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3015 } 3016 } 3017 3018 void hci_emit_state(void){ 3019 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3020 uint8_t event[3]; 3021 event[0] = BTSTACK_EVENT_STATE; 3022 event[1] = sizeof(event) - 2; 3023 event[2] = hci_stack->state; 3024 hci_emit_event(event, sizeof(event), 1); 3025 } 3026 3027 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3028 uint8_t event[13]; 3029 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3030 event[1] = sizeof(event) - 2; 3031 event[2] = status; 3032 little_endian_store_16(event, 3, con_handle); 3033 reverse_bd_addr(address, &event[5]); 3034 event[11] = 1; // ACL connection 3035 event[12] = 0; // encryption disabled 3036 hci_emit_event(event, sizeof(event), 1); 3037 } 3038 3039 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3040 uint8_t event[21]; 3041 event[0] = HCI_EVENT_LE_META; 3042 event[1] = sizeof(event) - 2; 3043 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3044 event[3] = status; 3045 little_endian_store_16(event, 4, con_handle); 3046 event[6] = 0; // TODO: role 3047 event[7] = address_type; 3048 reverse_bd_addr(address, &event[8]); 3049 little_endian_store_16(event, 14, 0); // interval 3050 little_endian_store_16(event, 16, 0); // latency 3051 little_endian_store_16(event, 18, 0); // supervision timeout 3052 event[20] = 0; // master clock accuracy 3053 hci_emit_event(event, sizeof(event), 1); 3054 } 3055 3056 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3057 uint8_t event[6]; 3058 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3059 event[1] = sizeof(event) - 2; 3060 event[2] = 0; // status = OK 3061 little_endian_store_16(event, 3, con_handle); 3062 event[5] = reason; 3063 hci_emit_event(event, sizeof(event), 1); 3064 } 3065 3066 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3067 if (disable_l2cap_timeouts) return; 3068 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3069 uint8_t event[4]; 3070 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3071 event[1] = sizeof(event) - 2; 3072 little_endian_store_16(event, 2, conn->con_handle); 3073 hci_emit_event(event, sizeof(event), 1); 3074 } 3075 3076 static void hci_emit_nr_connections_changed(void){ 3077 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3078 uint8_t event[3]; 3079 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3080 event[1] = sizeof(event) - 2; 3081 event[2] = nr_hci_connections(); 3082 hci_emit_event(event, sizeof(event), 1); 3083 } 3084 3085 static void hci_emit_hci_open_failed(void){ 3086 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3087 uint8_t event[2]; 3088 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3089 event[1] = sizeof(event) - 2; 3090 hci_emit_event(event, sizeof(event), 1); 3091 } 3092 3093 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3094 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3095 uint8_t event[3]; 3096 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3097 event[1] = sizeof(event) - 2; 3098 event[2] = enabled; 3099 hci_emit_event(event, sizeof(event), 1); 3100 } 3101 3102 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3103 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3104 uint8_t event[5]; 3105 int pos = 0; 3106 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3107 event[pos++] = sizeof(event) - 2; 3108 little_endian_store_16(event, 2, con_handle); 3109 pos += 2; 3110 event[pos++] = level; 3111 hci_emit_event(event, sizeof(event), 1); 3112 } 3113 3114 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3115 log_info("hci_emit_dedicated_bonding_result %u ", status); 3116 uint8_t event[9]; 3117 int pos = 0; 3118 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3119 event[pos++] = sizeof(event) - 2; 3120 event[pos++] = status; 3121 reverse_bd_addr(address, &event[pos]); 3122 hci_emit_event(event, sizeof(event), 1); 3123 } 3124 3125 // query if remote side supports eSCO 3126 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3127 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3128 if (!connection) return 0; 3129 return connection->remote_supported_feature_eSCO; 3130 } 3131 3132 // query if remote side supports SSP 3133 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3134 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3135 if (!connection) return 0; 3136 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3137 } 3138 3139 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3140 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3141 } 3142 3143 // GAP API 3144 /** 3145 * @bbrief enable/disable bonding. default is enabled 3146 * @praram enabled 3147 */ 3148 void gap_set_bondable_mode(int enable){ 3149 hci_stack->bondable = enable ? 1 : 0; 3150 } 3151 /** 3152 * @brief Get bondable mode. 3153 * @return 1 if bondable 3154 */ 3155 int gap_get_bondable_mode(void){ 3156 return hci_stack->bondable; 3157 } 3158 3159 /** 3160 * @brief map link keys to security levels 3161 */ 3162 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3163 switch (link_key_type){ 3164 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3165 return LEVEL_4; 3166 case COMBINATION_KEY: 3167 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3168 return LEVEL_3; 3169 default: 3170 return LEVEL_2; 3171 } 3172 } 3173 3174 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3175 if (!connection) return LEVEL_0; 3176 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3177 return gap_security_level_for_link_key_type(connection->link_key_type); 3178 } 3179 3180 3181 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3182 log_info("gap_mitm_protection_required_for_security_level %u", level); 3183 return level > LEVEL_2; 3184 } 3185 3186 /** 3187 * @brief get current security level 3188 */ 3189 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3190 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3191 if (!connection) return LEVEL_0; 3192 return gap_security_level_for_connection(connection); 3193 } 3194 3195 /** 3196 * @brief request connection to device to 3197 * @result GAP_AUTHENTICATION_RESULT 3198 */ 3199 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3200 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3201 if (!connection){ 3202 hci_emit_security_level(con_handle, LEVEL_0); 3203 return; 3204 } 3205 gap_security_level_t current_level = gap_security_level(con_handle); 3206 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3207 if (current_level >= requested_level){ 3208 hci_emit_security_level(con_handle, current_level); 3209 return; 3210 } 3211 3212 connection->requested_security_level = requested_level; 3213 3214 #if 0 3215 // sending encryption request without a link key results in an error. 3216 // TODO: figure out how to use it properly 3217 3218 // would enabling ecnryption suffice (>= LEVEL_2)? 3219 if (hci_stack->link_key_db){ 3220 link_key_type_t link_key_type; 3221 link_key_t link_key; 3222 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3223 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3224 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3225 return; 3226 } 3227 } 3228 } 3229 #endif 3230 3231 // try to authenticate connection 3232 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3233 hci_run(); 3234 } 3235 3236 /** 3237 * @brief start dedicated bonding with device. disconnect after bonding 3238 * @param device 3239 * @param request MITM protection 3240 * @result GAP_DEDICATED_BONDING_COMPLETE 3241 */ 3242 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3243 3244 // create connection state machine 3245 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3246 3247 if (!connection){ 3248 return BTSTACK_MEMORY_ALLOC_FAILED; 3249 } 3250 3251 // delete linkn key 3252 gap_drop_link_key_for_bd_addr(device); 3253 3254 // configure LEVEL_2/3, dedicated bonding 3255 connection->state = SEND_CREATE_CONNECTION; 3256 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3257 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3258 connection->bonding_flags = BONDING_DEDICATED; 3259 3260 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3261 3262 // handle: connnection failure (connection complete != ok) 3263 // handle: authentication failure 3264 // handle: disconnect on done 3265 3266 hci_run(); 3267 3268 return 0; 3269 } 3270 3271 void gap_set_local_name(const char * local_name){ 3272 hci_stack->local_name = local_name; 3273 } 3274 3275 void gap_start_scan(void){ 3276 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3277 hci_stack->le_scanning_state = LE_START_SCAN; 3278 hci_run(); 3279 } 3280 3281 void gap_stop_scan(void){ 3282 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3283 hci_stack->le_scanning_state = LE_STOP_SCAN; 3284 hci_run(); 3285 } 3286 3287 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3288 hci_stack->le_scan_type = scan_type; 3289 hci_stack->le_scan_interval = scan_interval; 3290 hci_stack->le_scan_window = scan_window; 3291 hci_run(); 3292 } 3293 3294 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3295 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3296 if (!conn){ 3297 log_info("gap_connect: no connection exists yet, creating context"); 3298 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3299 if (!conn){ 3300 // notify client that alloc failed 3301 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3302 log_info("gap_connect: failed to alloc hci_connection_t"); 3303 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3304 } 3305 conn->state = SEND_CREATE_CONNECTION; 3306 log_info("gap_connect: send create connection next"); 3307 hci_run(); 3308 return 0; 3309 } 3310 3311 if (!hci_is_le_connection(conn) || 3312 conn->state == SEND_CREATE_CONNECTION || 3313 conn->state == SENT_CREATE_CONNECTION) { 3314 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3315 log_error("gap_connect: classic connection or connect is already being created"); 3316 return GATT_CLIENT_IN_WRONG_STATE; 3317 } 3318 3319 log_info("gap_connect: context exists with state %u", conn->state); 3320 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3321 hci_run(); 3322 return 0; 3323 } 3324 3325 // @assumption: only a single outgoing LE Connection exists 3326 static hci_connection_t * gap_get_outgoing_connection(void){ 3327 btstack_linked_item_t *it; 3328 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3329 hci_connection_t * conn = (hci_connection_t *) it; 3330 if (!hci_is_le_connection(conn)) continue; 3331 switch (conn->state){ 3332 case SEND_CREATE_CONNECTION: 3333 case SENT_CREATE_CONNECTION: 3334 return conn; 3335 default: 3336 break; 3337 }; 3338 } 3339 return NULL; 3340 } 3341 3342 uint8_t gap_connect_cancel(void){ 3343 hci_connection_t * conn = gap_get_outgoing_connection(); 3344 if (!conn) return 0; 3345 switch (conn->state){ 3346 case SEND_CREATE_CONNECTION: 3347 // skip sending create connection and emit event instead 3348 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3349 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3350 btstack_memory_hci_connection_free( conn ); 3351 break; 3352 case SENT_CREATE_CONNECTION: 3353 // request to send cancel connection 3354 conn->state = SEND_CANCEL_CONNECTION; 3355 hci_run(); 3356 break; 3357 default: 3358 break; 3359 } 3360 return 0; 3361 } 3362 3363 /** 3364 * @brief Updates the connection parameters for a given LE connection 3365 * @param handle 3366 * @param conn_interval_min (unit: 1.25ms) 3367 * @param conn_interval_max (unit: 1.25ms) 3368 * @param conn_latency 3369 * @param supervision_timeout (unit: 10ms) 3370 * @returns 0 if ok 3371 */ 3372 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3373 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3374 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3375 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3376 connection->le_conn_interval_min = conn_interval_min; 3377 connection->le_conn_interval_max = conn_interval_max; 3378 connection->le_conn_latency = conn_latency; 3379 connection->le_supervision_timeout = supervision_timeout; 3380 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3381 hci_run(); 3382 return 0; 3383 } 3384 3385 /** 3386 * @brief Request an update of the connection parameter for a given LE connection 3387 * @param handle 3388 * @param conn_interval_min (unit: 1.25ms) 3389 * @param conn_interval_max (unit: 1.25ms) 3390 * @param conn_latency 3391 * @param supervision_timeout (unit: 10ms) 3392 * @returns 0 if ok 3393 */ 3394 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3395 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3396 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3397 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3398 connection->le_conn_interval_min = conn_interval_min; 3399 connection->le_conn_interval_max = conn_interval_max; 3400 connection->le_conn_latency = conn_latency; 3401 connection->le_supervision_timeout = supervision_timeout; 3402 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3403 hci_run(); 3404 return 0; 3405 } 3406 3407 static void gap_advertisments_changed(void){ 3408 // disable advertisements before updating adv, scan data, or adv params 3409 if (hci_stack->le_advertisements_active){ 3410 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3411 } 3412 hci_run(); 3413 } 3414 3415 /** 3416 * @brief Set Advertisement Data 3417 * @param advertising_data_length 3418 * @param advertising_data (max 31 octets) 3419 * @note data is not copied, pointer has to stay valid 3420 */ 3421 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3422 hci_stack->le_advertisements_data_len = advertising_data_length; 3423 hci_stack->le_advertisements_data = advertising_data; 3424 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3425 gap_advertisments_changed(); 3426 } 3427 3428 /** 3429 * @brief Set Scan Response Data 3430 * @param advertising_data_length 3431 * @param advertising_data (max 31 octets) 3432 * @note data is not copied, pointer has to stay valid 3433 */ 3434 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3435 hci_stack->le_scan_response_data_len = scan_response_data_length; 3436 hci_stack->le_scan_response_data = scan_response_data; 3437 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3438 gap_advertisments_changed(); 3439 } 3440 3441 /** 3442 * @brief Set Advertisement Parameters 3443 * @param adv_int_min 3444 * @param adv_int_max 3445 * @param adv_type 3446 * @param own_address_type 3447 * @param direct_address_type 3448 * @param direct_address 3449 * @param channel_map 3450 * @param filter_policy 3451 * 3452 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3453 */ 3454 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3455 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3456 uint8_t channel_map, uint8_t filter_policy) { 3457 3458 hci_stack->le_advertisements_interval_min = adv_int_min; 3459 hci_stack->le_advertisements_interval_max = adv_int_max; 3460 hci_stack->le_advertisements_type = adv_type; 3461 hci_stack->le_advertisements_own_address_type = own_address_type; 3462 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3463 hci_stack->le_advertisements_channel_map = channel_map; 3464 hci_stack->le_advertisements_filter_policy = filter_policy; 3465 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3466 3467 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3468 gap_advertisments_changed(); 3469 } 3470 3471 /** 3472 * @brief Enable/Disable Advertisements 3473 * @param enabled 3474 */ 3475 void gap_advertisements_enable(int enabled){ 3476 hci_stack->le_advertisements_enabled = enabled; 3477 if (enabled && !hci_stack->le_advertisements_active){ 3478 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3479 } 3480 if (!enabled && hci_stack->le_advertisements_active){ 3481 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3482 } 3483 hci_run(); 3484 } 3485 3486 3487 uint8_t gap_disconnect(hci_con_handle_t handle){ 3488 hci_connection_t * conn = hci_connection_for_handle(handle); 3489 if (!conn){ 3490 hci_emit_disconnection_complete(handle, 0); 3491 return 0; 3492 } 3493 conn->state = SEND_DISCONNECT; 3494 hci_run(); 3495 return 0; 3496 } 3497 3498 /** 3499 * @brief Get connection type 3500 * @param con_handle 3501 * @result connection_type 3502 */ 3503 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3504 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3505 if (!conn) return GAP_CONNECTION_INVALID; 3506 switch (conn->address_type){ 3507 case BD_ADDR_TYPE_LE_PUBLIC: 3508 case BD_ADDR_TYPE_LE_RANDOM: 3509 return GAP_CONNECTION_LE; 3510 case BD_ADDR_TYPE_SCO: 3511 return GAP_CONNECTION_SCO; 3512 case BD_ADDR_TYPE_CLASSIC: 3513 return GAP_CONNECTION_ACL; 3514 default: 3515 return GAP_CONNECTION_INVALID; 3516 } 3517 } 3518 3519 #ifdef ENABLE_BLE 3520 3521 /** 3522 * @brief Auto Connection Establishment - Start Connecting to device 3523 * @param address_typ 3524 * @param address 3525 * @returns 0 if ok 3526 */ 3527 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3528 // check capacity 3529 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3530 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3531 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3532 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3533 entry->address_type = address_type; 3534 memcpy(entry->address, address, 6); 3535 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3536 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3537 hci_run(); 3538 return 0; 3539 } 3540 3541 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3542 btstack_linked_list_iterator_t it; 3543 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3544 while (btstack_linked_list_iterator_has_next(&it)){ 3545 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3546 if (entry->address_type != address_type) continue; 3547 if (memcmp(entry->address, address, 6) != 0) continue; 3548 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3549 // remove from controller if already present 3550 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3551 continue; 3552 } 3553 // direclty remove entry from whitelist 3554 btstack_linked_list_iterator_remove(&it); 3555 btstack_memory_whitelist_entry_free(entry); 3556 } 3557 } 3558 3559 /** 3560 * @brief Auto Connection Establishment - Stop Connecting to device 3561 * @param address_typ 3562 * @param address 3563 * @returns 0 if ok 3564 */ 3565 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3566 hci_remove_from_whitelist(address_type, address); 3567 hci_run(); 3568 return 0; 3569 } 3570 3571 /** 3572 * @brief Auto Connection Establishment - Stop everything 3573 * @note Convenience function to stop all active auto connection attempts 3574 */ 3575 void gap_auto_connection_stop_all(void){ 3576 btstack_linked_list_iterator_t it; 3577 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3578 while (btstack_linked_list_iterator_has_next(&it)){ 3579 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3580 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3581 // remove from controller if already present 3582 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3583 continue; 3584 } 3585 // directly remove entry from whitelist 3586 btstack_linked_list_iterator_remove(&it); 3587 btstack_memory_whitelist_entry_free(entry); 3588 } 3589 hci_run(); 3590 } 3591 3592 #endif 3593 3594 /** 3595 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3596 */ 3597 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3598 hci_stack->sco_voice_setting = voice_setting; 3599 } 3600 3601 /** 3602 * @brief Get SCO Voice Setting 3603 * @return current voice setting 3604 */ 3605 uint16_t hci_get_sco_voice_setting(void){ 3606 return hci_stack->sco_voice_setting; 3607 } 3608 3609 /** @brief Get SCO packet length for current SCO Voice setting 3610 * @note Using SCO packets of the exact length is required for USB transfer 3611 * @return Length of SCO packets in bytes (not audio frames) 3612 */ 3613 int hci_get_sco_packet_length(void){ 3614 // see Core Spec for H2 USB Transfer. 3615 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3616 return 27; 3617 } 3618 3619 /** 3620 * @brief Set callback for Bluetooth Hardware Error 3621 */ 3622 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3623 hci_stack->hardware_error_callback = fn; 3624 } 3625 3626 /** 3627 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3628 * @note Can be used to select chipset driver dynamically during startup 3629 */ 3630 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3631 hci_stack->local_version_information_callback = fn; 3632 } 3633 3634 void hci_disconnect_all(void){ 3635 btstack_linked_list_iterator_t it; 3636 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3637 while (btstack_linked_list_iterator_has_next(&it)){ 3638 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3639 if (con->state == SENT_DISCONNECT) continue; 3640 con->state = SEND_DISCONNECT; 3641 } 3642 hci_run(); 3643 } 3644