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 #ifdef ENABLE_CLASSIC 80 static void hci_update_scan_enable(void); 81 static void hci_emit_discoverable_enabled(uint8_t enabled); 82 static int hci_local_ssp_activated(void); 83 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 84 static void hci_notify_if_sco_can_send_now(void); 85 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 86 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 87 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 88 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 89 static void hci_connection_timestamp(hci_connection_t *connection); 90 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 91 #endif 92 static int hci_power_control_on(void); 93 static void hci_power_control_off(void); 94 static void hci_state_reset(void); 95 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 96 static void hci_emit_nr_connections_changed(void); 97 static void hci_emit_hci_open_failed(void); 98 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 99 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 100 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 101 static void hci_run(void); 102 static int hci_is_le_connection(hci_connection_t * connection); 103 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 104 105 #ifdef ENABLE_BLE 106 // called from test/ble_client/advertising_data_parser.c 107 void le_handle_advertisement_report(uint8_t *packet, int size); 108 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 109 #endif 110 111 // the STACK is here 112 #ifndef HAVE_MALLOC 113 static hci_stack_t hci_stack_static; 114 #endif 115 static hci_stack_t * hci_stack = NULL; 116 117 // test helper 118 static uint8_t disable_l2cap_timeouts = 0; 119 120 /** 121 * create connection for given address 122 * 123 * @return connection OR NULL, if no memory left 124 */ 125 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 126 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 127 hci_connection_t * conn = btstack_memory_hci_connection_get(); 128 if (!conn) return NULL; 129 memset(conn, 0, sizeof(hci_connection_t)); 130 bd_addr_copy(conn->address, addr); 131 conn->address_type = addr_type; 132 conn->con_handle = 0xffff; 133 conn->authentication_flags = AUTH_FLAGS_NONE; 134 conn->bonding_flags = 0; 135 conn->requested_security_level = LEVEL_0; 136 #ifdef ENABLE_CLASSIC 137 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 138 btstack_run_loop_set_timer_context(&conn->timeout, conn); 139 hci_connection_timestamp(conn); 140 #endif 141 conn->acl_recombination_length = 0; 142 conn->acl_recombination_pos = 0; 143 conn->num_acl_packets_sent = 0; 144 conn->num_sco_packets_sent = 0; 145 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 146 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 147 return conn; 148 } 149 150 151 /** 152 * get le connection parameter range 153 * 154 * @return le connection parameter range struct 155 */ 156 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 157 *range = hci_stack->le_connection_parameter_range; 158 } 159 160 /** 161 * set le connection parameter range 162 * 163 */ 164 165 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 166 hci_stack->le_connection_parameter_range = *range; 167 } 168 169 /** 170 * get hci connections iterator 171 * 172 * @return hci connections iterator 173 */ 174 175 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 176 btstack_linked_list_iterator_init(it, &hci_stack->connections); 177 } 178 179 /** 180 * get connection for a given handle 181 * 182 * @return connection OR NULL, if not found 183 */ 184 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 185 btstack_linked_list_iterator_t it; 186 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 187 while (btstack_linked_list_iterator_has_next(&it)){ 188 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 189 if ( item->con_handle == con_handle ) { 190 return item; 191 } 192 } 193 return NULL; 194 } 195 196 /** 197 * get connection for given address 198 * 199 * @return connection OR NULL, if not found 200 */ 201 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 202 btstack_linked_list_iterator_t it; 203 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 204 while (btstack_linked_list_iterator_has_next(&it)){ 205 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 206 if (connection->address_type != addr_type) continue; 207 if (memcmp(addr, connection->address, 6) != 0) continue; 208 return connection; 209 } 210 return NULL; 211 } 212 213 214 #ifdef ENABLE_CLASSIC 215 216 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 217 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 218 #ifdef HAVE_EMBEDDED_TICK 219 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 220 // connections might be timed out 221 hci_emit_l2cap_check_timeout(connection); 222 } 223 #else 224 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 225 // connections might be timed out 226 hci_emit_l2cap_check_timeout(connection); 227 } 228 #endif 229 } 230 231 static void hci_connection_timestamp(hci_connection_t *connection){ 232 #ifdef HAVE_EMBEDDED_TICK 233 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 234 #else 235 connection->timestamp = btstack_run_loop_get_time_ms(); 236 #endif 237 } 238 239 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 240 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 241 } 242 243 244 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 245 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 246 } 247 248 /** 249 * add authentication flags and reset timer 250 * @note: assumes classic connection 251 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 252 */ 253 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 254 bd_addr_t addr; 255 reverse_bd_addr(bd_addr, addr); 256 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 257 if (conn) { 258 connectionSetAuthenticationFlags(conn, flags); 259 hci_connection_timestamp(conn); 260 } 261 } 262 263 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 264 hci_connection_t * conn = hci_connection_for_handle(handle); 265 if (!conn) return 0; 266 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 267 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 268 return 0; 269 } 270 271 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 272 if (!hci_stack->link_key_db) return; 273 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 274 hci_stack->link_key_db->delete_link_key(addr); 275 } 276 277 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 278 if (!hci_stack->link_key_db) return; 279 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 280 hci_stack->link_key_db->put_link_key(addr, link_key, type); 281 } 282 #endif 283 284 static int hci_is_le_connection(hci_connection_t * connection){ 285 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 286 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 287 } 288 289 /** 290 * count connections 291 */ 292 static int nr_hci_connections(void){ 293 int count = 0; 294 btstack_linked_item_t *it; 295 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 296 return count; 297 } 298 299 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 300 301 unsigned int num_packets_sent_classic = 0; 302 unsigned int num_packets_sent_le = 0; 303 304 btstack_linked_item_t *it; 305 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 306 hci_connection_t * connection = (hci_connection_t *) it; 307 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 308 num_packets_sent_classic += connection->num_acl_packets_sent; 309 } else { 310 num_packets_sent_le += connection->num_acl_packets_sent; 311 } 312 } 313 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 314 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 315 int free_slots_le = 0; 316 317 if (free_slots_classic < 0){ 318 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); 319 return 0; 320 } 321 322 if (hci_stack->le_acl_packets_total_num){ 323 // if we have LE slots, they are used 324 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 325 if (free_slots_le < 0){ 326 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); 327 return 0; 328 } 329 } else { 330 // otherwise, classic slots are used for LE, too 331 free_slots_classic -= num_packets_sent_le; 332 if (free_slots_classic < 0){ 333 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); 334 return 0; 335 } 336 } 337 338 switch (address_type){ 339 case BD_ADDR_TYPE_UNKNOWN: 340 log_error("hci_number_free_acl_slots: unknown address type"); 341 return 0; 342 343 case BD_ADDR_TYPE_CLASSIC: 344 return free_slots_classic; 345 346 default: 347 if (hci_stack->le_acl_packets_total_num){ 348 return free_slots_le; 349 } 350 return free_slots_classic; 351 } 352 } 353 354 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 355 // get connection type 356 hci_connection_t * connection = hci_connection_for_handle(con_handle); 357 if (!connection){ 358 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 359 return 0; 360 } 361 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 362 } 363 364 #ifdef ENABLE_CLASSIC 365 static int hci_number_free_sco_slots(void){ 366 unsigned int num_sco_packets_sent = 0; 367 btstack_linked_item_t *it; 368 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 369 hci_connection_t * connection = (hci_connection_t *) it; 370 num_sco_packets_sent += connection->num_sco_packets_sent; 371 } 372 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 373 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 374 return 0; 375 } 376 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 377 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 378 } 379 #endif 380 381 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 382 int hci_can_send_command_packet_now(void){ 383 if (hci_stack->hci_packet_buffer_reserved) return 0; 384 385 // check for async hci transport implementations 386 if (hci_stack->hci_transport->can_send_packet_now){ 387 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 388 return 0; 389 } 390 } 391 392 return hci_stack->num_cmd_packets > 0; 393 } 394 395 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 396 // check for async hci transport implementations 397 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 398 return hci_stack->hci_transport->can_send_packet_now(packet_type); 399 } 400 401 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 402 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 403 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 404 } 405 406 int hci_can_send_acl_le_packet_now(void){ 407 if (hci_stack->hci_packet_buffer_reserved) return 0; 408 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 409 } 410 411 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 412 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 413 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 414 } 415 416 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 417 if (hci_stack->hci_packet_buffer_reserved) return 0; 418 return hci_can_send_prepared_acl_packet_now(con_handle); 419 } 420 421 #ifdef ENABLE_CLASSIC 422 int hci_can_send_acl_classic_packet_now(void){ 423 if (hci_stack->hci_packet_buffer_reserved) return 0; 424 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 425 } 426 427 int hci_can_send_prepared_sco_packet_now(void){ 428 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 429 if (!hci_stack->synchronous_flow_control_enabled) return 1; 430 return hci_number_free_sco_slots() > 0; 431 } 432 433 int hci_can_send_sco_packet_now(void){ 434 if (hci_stack->hci_packet_buffer_reserved) return 0; 435 return hci_can_send_prepared_sco_packet_now(); 436 } 437 438 void hci_request_sco_can_send_now_event(void){ 439 hci_stack->sco_waiting_for_can_send_now = 1; 440 hci_notify_if_sco_can_send_now(); 441 } 442 #endif 443 444 // used for internal checks in l2cap.c 445 int hci_is_packet_buffer_reserved(void){ 446 return hci_stack->hci_packet_buffer_reserved; 447 } 448 449 // reserves outgoing packet buffer. @returns 1 if successful 450 int hci_reserve_packet_buffer(void){ 451 if (hci_stack->hci_packet_buffer_reserved) { 452 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 453 return 0; 454 } 455 hci_stack->hci_packet_buffer_reserved = 1; 456 return 1; 457 } 458 459 void hci_release_packet_buffer(void){ 460 hci_stack->hci_packet_buffer_reserved = 0; 461 } 462 463 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 464 static int hci_transport_synchronous(void){ 465 return hci_stack->hci_transport->can_send_packet_now == NULL; 466 } 467 468 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 469 470 // 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); 471 472 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 473 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 474 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 475 max_acl_data_packet_length = hci_stack->le_data_packets_length; 476 } 477 478 // testing: reduce buffer to minimum 479 // max_acl_data_packet_length = 52; 480 481 log_debug("hci_send_acl_packet_fragments entered"); 482 483 int err; 484 // multiple packets could be send on a synchronous HCI transport 485 while (1){ 486 487 log_debug("hci_send_acl_packet_fragments loop entered"); 488 489 // get current data 490 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 491 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 492 int more_fragments = 0; 493 494 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 495 if (current_acl_data_packet_length > max_acl_data_packet_length){ 496 more_fragments = 1; 497 current_acl_data_packet_length = max_acl_data_packet_length; 498 } 499 500 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 501 if (acl_header_pos > 0){ 502 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 503 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 504 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 505 } 506 507 // update header len 508 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 509 510 // count packet 511 connection->num_acl_packets_sent++; 512 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 513 514 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 515 if (more_fragments){ 516 // update start of next fragment to send 517 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 518 } else { 519 // done 520 hci_stack->acl_fragmentation_pos = 0; 521 hci_stack->acl_fragmentation_total_size = 0; 522 } 523 524 // send packet 525 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 526 const int size = current_acl_data_packet_length + 4; 527 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 528 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 529 530 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 531 532 // done yet? 533 if (!more_fragments) break; 534 535 // can send more? 536 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 537 } 538 539 log_debug("hci_send_acl_packet_fragments loop over"); 540 541 // release buffer now for synchronous transport 542 if (hci_transport_synchronous()){ 543 hci_release_packet_buffer(); 544 // notify upper stack that it might be possible to send again 545 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 546 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 547 } 548 549 return err; 550 } 551 552 // pre: caller has reserved the packet buffer 553 int hci_send_acl_packet_buffer(int size){ 554 555 // log_info("hci_send_acl_packet_buffer size %u", size); 556 557 if (!hci_stack->hci_packet_buffer_reserved) { 558 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 559 return 0; 560 } 561 562 uint8_t * packet = hci_stack->hci_packet_buffer; 563 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 564 565 // check for free places on Bluetooth module 566 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 567 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 568 hci_release_packet_buffer(); 569 return BTSTACK_ACL_BUFFERS_FULL; 570 } 571 572 hci_connection_t *connection = hci_connection_for_handle( con_handle); 573 if (!connection) { 574 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 575 hci_release_packet_buffer(); 576 return 0; 577 } 578 579 #ifdef ENABLE_CLASSIC 580 hci_connection_timestamp(connection); 581 #endif 582 583 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 584 585 // setup data 586 hci_stack->acl_fragmentation_total_size = size; 587 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 588 589 return hci_send_acl_packet_fragments(connection); 590 } 591 592 #ifdef ENABLE_CLASSIC 593 // pre: caller has reserved the packet buffer 594 int hci_send_sco_packet_buffer(int size){ 595 596 // log_info("hci_send_acl_packet_buffer size %u", size); 597 598 if (!hci_stack->hci_packet_buffer_reserved) { 599 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 600 return 0; 601 } 602 603 uint8_t * packet = hci_stack->hci_packet_buffer; 604 605 // skip checks in loopback mode 606 if (!hci_stack->loopback_mode){ 607 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 608 609 // check for free places on Bluetooth module 610 if (!hci_can_send_prepared_sco_packet_now()) { 611 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 612 hci_release_packet_buffer(); 613 return BTSTACK_ACL_BUFFERS_FULL; 614 } 615 616 // track send packet in connection struct 617 hci_connection_t *connection = hci_connection_for_handle( con_handle); 618 if (!connection) { 619 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 620 hci_release_packet_buffer(); 621 return 0; 622 } 623 connection->num_sco_packets_sent++; 624 } 625 626 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 627 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 628 629 if (hci_transport_synchronous()){ 630 hci_release_packet_buffer(); 631 // notify upper stack that it might be possible to send again 632 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 633 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 634 } 635 636 return err; 637 } 638 #endif 639 640 static void acl_handler(uint8_t *packet, int size){ 641 642 // log_info("acl_handler: size %u", size); 643 644 // get info 645 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 646 hci_connection_t *conn = hci_connection_for_handle(con_handle); 647 uint8_t acl_flags = READ_ACL_FLAGS(packet); 648 uint16_t acl_length = READ_ACL_LENGTH(packet); 649 650 // ignore non-registered handle 651 if (!conn){ 652 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 653 return; 654 } 655 656 // assert packet is complete 657 if (acl_length + 4 != size){ 658 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 659 return; 660 } 661 662 #ifdef ENABLE_CLASSIC 663 // update idle timestamp 664 hci_connection_timestamp(conn); 665 #endif 666 667 // handle different packet types 668 switch (acl_flags & 0x03) { 669 670 case 0x01: // continuation fragment 671 672 // sanity checks 673 if (conn->acl_recombination_pos == 0) { 674 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 675 return; 676 } 677 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 678 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 679 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 680 conn->acl_recombination_pos = 0; 681 return; 682 } 683 684 // append fragment payload (header already stored) 685 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 686 conn->acl_recombination_pos += acl_length; 687 688 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 689 // conn->acl_recombination_pos, conn->acl_recombination_length); 690 691 // forward complete L2CAP packet if complete. 692 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 693 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 694 // reset recombination buffer 695 conn->acl_recombination_length = 0; 696 conn->acl_recombination_pos = 0; 697 } 698 break; 699 700 case 0x02: { // first fragment 701 702 // sanity check 703 if (conn->acl_recombination_pos) { 704 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 705 conn->acl_recombination_pos = 0; 706 } 707 708 // peek into L2CAP packet! 709 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 710 711 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 712 713 // compare fragment size to L2CAP packet size 714 if (acl_length >= l2cap_length + 4){ 715 // forward fragment as L2CAP packet 716 hci_emit_acl_packet(packet, acl_length + 4); 717 } else { 718 719 if (acl_length > HCI_ACL_BUFFER_SIZE){ 720 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 721 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 722 return; 723 } 724 725 // store first fragment and tweak acl length for complete package 726 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 727 conn->acl_recombination_pos = acl_length + 4; 728 conn->acl_recombination_length = l2cap_length; 729 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 730 } 731 break; 732 733 } 734 default: 735 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 736 return; 737 } 738 739 // execute main loop 740 hci_run(); 741 } 742 743 static void hci_shutdown_connection(hci_connection_t *conn){ 744 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 745 746 btstack_run_loop_remove_timer(&conn->timeout); 747 748 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 749 btstack_memory_hci_connection_free( conn ); 750 751 // now it's gone 752 hci_emit_nr_connections_changed(); 753 } 754 755 #ifdef ENABLE_CLASSIC 756 757 static const uint16_t packet_type_sizes[] = { 758 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 759 HCI_ACL_DH1_SIZE, 0, 0, 0, 760 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 761 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 762 }; 763 static const uint8_t packet_type_feature_requirement_bit[] = { 764 0, // 3 slot packets 765 1, // 5 slot packets 766 25, // EDR 2 mpbs 767 26, // EDR 3 mbps 768 39, // 3 slot EDR packts 769 40, // 5 slot EDR packet 770 }; 771 static const uint16_t packet_type_feature_packet_mask[] = { 772 0x0f00, // 3 slot packets 773 0xf000, // 5 slot packets 774 0x1102, // EDR 2 mpbs 775 0x2204, // EDR 3 mbps 776 0x0300, // 3 slot EDR packts 777 0x3000, // 5 slot EDR packet 778 }; 779 780 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 781 // enable packet types based on size 782 uint16_t packet_types = 0; 783 unsigned int i; 784 for (i=0;i<16;i++){ 785 if (packet_type_sizes[i] == 0) continue; 786 if (packet_type_sizes[i] <= buffer_size){ 787 packet_types |= 1 << i; 788 } 789 } 790 // disable packet types due to missing local supported features 791 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 792 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 793 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 794 if (feature_set) continue; 795 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 796 packet_types &= ~packet_type_feature_packet_mask[i]; 797 } 798 // flip bits for "may not be used" 799 packet_types ^= 0x3306; 800 return packet_types; 801 } 802 803 uint16_t hci_usable_acl_packet_types(void){ 804 return hci_stack->packet_types; 805 } 806 #endif 807 808 uint8_t* hci_get_outgoing_packet_buffer(void){ 809 // hci packet buffer is >= acl data packet length 810 return hci_stack->hci_packet_buffer; 811 } 812 813 uint16_t hci_max_acl_data_packet_length(void){ 814 return hci_stack->acl_data_packet_length; 815 } 816 817 int hci_extended_sco_link_supported(void){ 818 // No. 31, byte 3, bit 7 819 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 820 } 821 822 int hci_non_flushable_packet_boundary_flag_supported(void){ 823 // No. 54, byte 6, bit 6 824 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 825 } 826 827 static int gap_ssp_supported(void){ 828 // No. 51, byte 6, bit 3 829 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 830 } 831 832 static int hci_classic_supported(void){ 833 #ifdef ENABLE_CLASSIC 834 // No. 37, byte 4, bit 5, = No BR/EDR Support 835 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 836 #else 837 return 0; 838 #endif 839 } 840 841 static int hci_le_supported(void){ 842 #ifdef ENABLE_BLE 843 // No. 37, byte 4, bit 6 = LE Supported (Controller) 844 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 845 #else 846 return 0; 847 #endif 848 } 849 850 // get addr type and address used in advertisement packets 851 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 852 *addr_type = hci_stack->adv_addr_type; 853 if (hci_stack->adv_addr_type){ 854 memcpy(addr, hci_stack->adv_address, 6); 855 } else { 856 memcpy(addr, hci_stack->local_bd_addr, 6); 857 } 858 } 859 860 #ifdef ENABLE_BLE 861 void le_handle_advertisement_report(uint8_t *packet, int size){ 862 863 UNUSED(size); 864 865 int offset = 3; 866 int num_reports = packet[offset]; 867 offset += 1; 868 869 int i; 870 // log_info("HCI: handle adv report with num reports: %d", num_reports); 871 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 872 for (i=0; i<num_reports;i++){ 873 uint8_t data_length = packet[offset + 8]; 874 uint8_t event_size = 10 + data_length; 875 int pos = 0; 876 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 877 event[pos++] = event_size; 878 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 879 offset += 8; 880 pos += 8; 881 event[pos++] = packet[offset + 1 + data_length]; // rssi 882 event[pos++] = packet[offset++]; //data_length; 883 memcpy(&event[pos], &packet[offset], data_length); 884 pos += data_length; 885 offset += data_length + 1; // rssi 886 hci_emit_event(event, pos, 1); 887 } 888 } 889 #endif 890 891 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 892 if (!hci_stack->config) return 0; 893 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 894 // Limit baud rate for Broadcom chipsets to 3 mbps 895 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 896 baud_rate = 3000000; 897 } 898 return baud_rate; 899 } 900 901 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 902 UNUSED(ds); 903 904 switch (hci_stack->substate){ 905 case HCI_INIT_W4_SEND_RESET: 906 log_info("Resend HCI Reset"); 907 hci_stack->substate = HCI_INIT_SEND_RESET; 908 hci_stack->num_cmd_packets = 1; 909 hci_run(); 910 break; 911 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 912 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 913 if (hci_stack->hci_transport->reset_link){ 914 hci_stack->hci_transport->reset_link(); 915 } 916 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 917 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 918 log_info("Resend HCI Reset - CSR Warm Boot"); 919 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 920 hci_stack->num_cmd_packets = 1; 921 hci_run(); 922 break; 923 case HCI_INIT_W4_SEND_BAUD_CHANGE: 924 if (hci_stack->hci_transport->set_baudrate){ 925 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 926 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 927 hci_stack->hci_transport->set_baudrate(baud_rate); 928 } 929 // For CSR, HCI Reset is sent on new baud rate 930 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 931 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 932 hci_run(); 933 } 934 break; 935 default: 936 break; 937 } 938 } 939 940 static void hci_initializing_next_state(void){ 941 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 942 } 943 944 // assumption: hci_can_send_command_packet_now() == true 945 static void hci_initializing_run(void){ 946 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 947 switch (hci_stack->substate){ 948 case HCI_INIT_SEND_RESET: 949 hci_state_reset(); 950 951 #ifndef HAVE_PLATFORM_IPHONE_OS 952 // prepare reset if command complete not received in 100ms 953 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 954 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 955 btstack_run_loop_add_timer(&hci_stack->timeout); 956 #endif 957 // send command 958 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 959 hci_send_cmd(&hci_reset); 960 break; 961 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 962 hci_send_cmd(&hci_read_local_version_information); 963 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 964 break; 965 case HCI_INIT_SEND_READ_LOCAL_NAME: 966 hci_send_cmd(&hci_read_local_name); 967 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 968 break; 969 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 970 hci_state_reset(); 971 // prepare reset if command complete not received in 100ms 972 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 973 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 974 btstack_run_loop_add_timer(&hci_stack->timeout); 975 // send command 976 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 977 hci_send_cmd(&hci_reset); 978 break; 979 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 980 hci_state_reset(); 981 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 982 hci_send_cmd(&hci_reset); 983 break; 984 case HCI_INIT_SEND_BAUD_CHANGE: { 985 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 986 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 987 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 988 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 989 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 990 // STLC25000D: baudrate change happens within 0.5 s after command was send, 991 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 992 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 993 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 994 btstack_run_loop_add_timer(&hci_stack->timeout); 995 } 996 break; 997 } 998 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 999 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1000 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1001 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1002 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1003 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1004 break; 1005 } 1006 case HCI_INIT_CUSTOM_INIT: 1007 // Custom initialization 1008 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1009 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1010 if (valid_cmd){ 1011 int size = 3 + hci_stack->hci_packet_buffer[2]; 1012 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1013 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1014 switch (valid_cmd) { 1015 case 1: 1016 default: 1017 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1018 break; 1019 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1020 log_info("CSR Warm Boot"); 1021 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1022 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1023 btstack_run_loop_add_timer(&hci_stack->timeout); 1024 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1025 && hci_stack->config 1026 && hci_stack->chipset 1027 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1028 && hci_stack->hci_transport->set_baudrate 1029 && hci_transport_uart_get_main_baud_rate()){ 1030 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1031 } else { 1032 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1033 } 1034 break; 1035 } 1036 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1037 break; 1038 } 1039 log_info("Init script done"); 1040 1041 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1042 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1043 int need_baud_change = hci_stack->config 1044 && hci_stack->chipset 1045 && hci_stack->chipset->set_baudrate_command 1046 && hci_stack->hci_transport->set_baudrate 1047 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1048 if (need_baud_change) { 1049 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1050 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1051 hci_stack->hci_transport->set_baudrate(baud_rate); 1052 } 1053 } 1054 } 1055 // otherwise continue 1056 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1057 hci_send_cmd(&hci_read_local_supported_commands); 1058 break; 1059 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1060 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1061 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1062 hci_send_cmd(&hci_read_local_supported_commands); 1063 break; 1064 case HCI_INIT_SET_BD_ADDR: 1065 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1066 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1067 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1068 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1069 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1070 break; 1071 case HCI_INIT_READ_BD_ADDR: 1072 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1073 hci_send_cmd(&hci_read_bd_addr); 1074 break; 1075 case HCI_INIT_READ_BUFFER_SIZE: 1076 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1077 hci_send_cmd(&hci_read_buffer_size); 1078 break; 1079 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1080 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1081 hci_send_cmd(&hci_read_local_supported_features); 1082 break; 1083 case HCI_INIT_SET_EVENT_MASK: 1084 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1085 if (hci_le_supported()){ 1086 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1087 } else { 1088 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1089 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1090 } 1091 break; 1092 #ifdef ENABLE_CLASSIC 1093 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1094 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1095 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1096 break; 1097 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1098 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1099 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1100 break; 1101 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1102 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1103 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1104 break; 1105 case HCI_INIT_WRITE_LOCAL_NAME: 1106 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1107 if (hci_stack->local_name){ 1108 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1109 } else { 1110 char local_name[8+17+1]; 1111 // BTstack 11:22:33:44:55:66 1112 memcpy(local_name, "BTstack ", 8); 1113 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1114 local_name[8+17] = '\0'; 1115 log_info("---> Name %s", local_name); 1116 hci_send_cmd(&hci_write_local_name, local_name); 1117 } 1118 break; 1119 case HCI_INIT_WRITE_EIR_DATA: 1120 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1121 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1122 break; 1123 case HCI_INIT_WRITE_INQUIRY_MODE: 1124 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1125 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1126 break; 1127 case HCI_INIT_WRITE_SCAN_ENABLE: 1128 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1129 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1130 break; 1131 // only sent if ENABLE_SCO_OVER_HCI is defined 1132 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1133 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1134 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1135 break; 1136 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1137 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1138 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1139 break; 1140 #endif 1141 #ifdef ENABLE_BLE 1142 // LE INIT 1143 case HCI_INIT_LE_READ_BUFFER_SIZE: 1144 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1145 hci_send_cmd(&hci_le_read_buffer_size); 1146 break; 1147 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1148 // LE Supported Host = 1, Simultaneous Host = 0 1149 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1150 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1151 break; 1152 case HCI_INIT_READ_WHITE_LIST_SIZE: 1153 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1154 hci_send_cmd(&hci_le_read_white_list_size); 1155 break; 1156 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1157 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1158 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1159 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1160 break; 1161 #endif 1162 default: 1163 return; 1164 } 1165 } 1166 1167 static void hci_init_done(void){ 1168 // done. tell the app 1169 log_info("hci_init_done -> HCI_STATE_WORKING"); 1170 hci_stack->state = HCI_STATE_WORKING; 1171 hci_emit_state(); 1172 hci_run(); 1173 } 1174 1175 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1176 UNUSED(size); 1177 1178 uint8_t command_completed = 0; 1179 1180 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1181 uint16_t opcode = little_endian_read_16(packet,3); 1182 if (opcode == hci_stack->last_cmd_opcode){ 1183 command_completed = 1; 1184 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1185 } else { 1186 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1187 } 1188 } 1189 1190 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1191 uint8_t status = packet[2]; 1192 uint16_t opcode = little_endian_read_16(packet,4); 1193 if (opcode == hci_stack->last_cmd_opcode){ 1194 if (status){ 1195 command_completed = 1; 1196 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1197 } else { 1198 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1199 } 1200 } else { 1201 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1202 } 1203 } 1204 1205 // Vendor == CSR 1206 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1207 // TODO: track actual command 1208 command_completed = 1; 1209 } 1210 1211 // Vendor == Toshiba 1212 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1213 // TODO: track actual command 1214 command_completed = 1; 1215 } 1216 1217 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1218 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1219 // 1220 // HCI Reset 1221 // Timeout 100 ms 1222 // HCI Reset 1223 // Command Complete Reset 1224 // HCI Read Local Version Information 1225 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1226 // hang... 1227 // 1228 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1229 if (!command_completed 1230 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1231 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1232 1233 uint16_t opcode = little_endian_read_16(packet,3); 1234 if (opcode == hci_reset.opcode){ 1235 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1236 return; 1237 } 1238 } 1239 1240 // CSR & H5 1241 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1242 if (!command_completed 1243 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1244 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1245 1246 uint16_t opcode = little_endian_read_16(packet,3); 1247 if (opcode == hci_reset.opcode){ 1248 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1249 return; 1250 } 1251 } 1252 1253 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1254 // fix: Correct substate and behave as command below 1255 if (command_completed){ 1256 switch (hci_stack->substate){ 1257 case HCI_INIT_SEND_RESET: 1258 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1259 break; 1260 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1261 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1262 break; 1263 default: 1264 break; 1265 } 1266 } 1267 1268 1269 if (!command_completed) return; 1270 1271 int need_baud_change = hci_stack->config 1272 && hci_stack->chipset 1273 && hci_stack->chipset->set_baudrate_command 1274 && hci_stack->hci_transport->set_baudrate 1275 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1276 1277 int need_addr_change = hci_stack->custom_bd_addr_set 1278 && hci_stack->chipset 1279 && hci_stack->chipset->set_bd_addr_command; 1280 1281 switch(hci_stack->substate){ 1282 case HCI_INIT_SEND_RESET: 1283 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1284 // fix: just correct substate and behave as command below 1285 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1286 btstack_run_loop_remove_timer(&hci_stack->timeout); 1287 break; 1288 case HCI_INIT_W4_SEND_RESET: 1289 btstack_run_loop_remove_timer(&hci_stack->timeout); 1290 break; 1291 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1292 log_info("Received local name, need baud change %d", need_baud_change); 1293 if (need_baud_change){ 1294 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1295 return; 1296 } 1297 // skip baud change 1298 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1299 return; 1300 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1301 // for STLC2500D, baud rate change already happened. 1302 // for others, baud rate gets changed now 1303 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1304 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1305 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1306 hci_stack->hci_transport->set_baudrate(baud_rate); 1307 } 1308 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1309 return; 1310 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1311 btstack_run_loop_remove_timer(&hci_stack->timeout); 1312 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1313 return; 1314 case HCI_INIT_W4_CUSTOM_INIT: 1315 // repeat custom init 1316 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1317 return; 1318 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1319 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1320 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1321 return; 1322 } 1323 if (need_addr_change){ 1324 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1325 return; 1326 } 1327 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1328 return; 1329 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1330 if (need_baud_change){ 1331 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1332 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 if (need_addr_change){ 1336 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1337 return; 1338 } 1339 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1340 return; 1341 case HCI_INIT_W4_SET_BD_ADDR: 1342 // for STLC2500D, bd addr change only gets active after sending reset command 1343 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1344 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1345 return; 1346 } 1347 // skipping st warm boot 1348 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1349 return; 1350 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1351 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1352 return; 1353 case HCI_INIT_W4_READ_BD_ADDR: 1354 // only read buffer size if supported 1355 if (hci_stack->local_supported_commands[0] & 0x01) { 1356 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1357 return; 1358 } 1359 // skipping read buffer size 1360 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1361 return; 1362 case HCI_INIT_W4_SET_EVENT_MASK: 1363 // skip Classic init commands for LE only chipsets 1364 if (!hci_classic_supported()){ 1365 if (hci_le_supported()){ 1366 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1367 return; 1368 } else { 1369 log_error("Neither BR/EDR nor LE supported"); 1370 hci_init_done(); 1371 return; 1372 } 1373 } 1374 if (!gap_ssp_supported()){ 1375 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1376 return; 1377 } 1378 break; 1379 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1380 // skip write le host if not supported (e.g. on LE only EM9301) 1381 if (hci_stack->local_supported_commands[0] & 0x02) break; 1382 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1383 return; 1384 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1385 // skip write eir data if no eir data set 1386 if (hci_stack->eir_data) break; 1387 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1388 return; 1389 1390 #ifdef ENABLE_SCO_OVER_HCI 1391 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1392 // skip write synchronous flow control if not supported 1393 if (hci_stack->local_supported_commands[0] & 0x04) break; 1394 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1395 // explicit fall through to reduce repetitions 1396 1397 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1398 // skip write default erroneous data reporting if not supported 1399 if (hci_stack->local_supported_commands[0] & 0x08) break; 1400 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1401 // explicit fall through to reduce repetitions 1402 1403 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1404 if (!hci_le_supported()){ 1405 // SKIP LE init for Classic only configuration 1406 hci_init_done(); 1407 return; 1408 } 1409 break; 1410 #else 1411 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1412 if (!hci_le_supported()){ 1413 // SKIP LE init for Classic only configuration 1414 hci_init_done(); 1415 return; 1416 } 1417 #endif 1418 break; 1419 // Response to command before init done state -> init done 1420 case (HCI_INIT_DONE-1): 1421 hci_init_done(); 1422 return; 1423 1424 default: 1425 break; 1426 } 1427 hci_initializing_next_state(); 1428 } 1429 1430 static void event_handler(uint8_t *packet, int size){ 1431 1432 uint16_t event_length = packet[1]; 1433 1434 // assert packet is complete 1435 if (size != event_length + 2){ 1436 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1437 return; 1438 } 1439 1440 bd_addr_t addr; 1441 bd_addr_type_t addr_type; 1442 uint8_t link_type; 1443 hci_con_handle_t handle; 1444 hci_connection_t * conn; 1445 int i; 1446 1447 // warnings 1448 (void) link_type; 1449 1450 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1451 1452 switch (hci_event_packet_get_type(packet)) { 1453 1454 case HCI_EVENT_COMMAND_COMPLETE: 1455 // get num cmd packets - limit to 1 to reduce complexity 1456 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1457 1458 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1459 // terminate, name 248 chars 1460 packet[6+248] = 0; 1461 log_info("local name: %s", &packet[6]); 1462 } 1463 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1464 // from offset 5 1465 // status 1466 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1467 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1468 hci_stack->sco_data_packet_length = packet[8]; 1469 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1470 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1471 1472 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1473 // determine usable ACL payload size 1474 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1475 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1476 } 1477 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1478 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1479 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1480 } 1481 } 1482 #ifdef ENABLE_BLE 1483 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1484 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1485 hci_stack->le_acl_packets_total_num = packet[8]; 1486 // determine usable ACL payload size 1487 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1488 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1489 } 1490 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1491 } 1492 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1493 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1494 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1495 } 1496 #endif 1497 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1498 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1499 hci_stack->local_bd_addr); 1500 log_info("Local Address, Status: 0x%02x: Addr: %s", 1501 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1502 #ifdef ENABLE_CLASSIC 1503 if (hci_stack->link_key_db){ 1504 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1505 } 1506 #endif 1507 } 1508 #ifdef ENABLE_CLASSIC 1509 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1510 hci_emit_discoverable_enabled(hci_stack->discoverable); 1511 } 1512 #endif 1513 1514 // Note: HCI init checks 1515 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1516 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1517 1518 #ifdef ENABLE_CLASSIC 1519 // determine usable ACL packet types based on host buffer size and supported features 1520 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1521 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1522 #endif 1523 // Classic/LE 1524 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1525 } 1526 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1527 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1528 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1529 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1530 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1531 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1532 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1533 } 1534 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1535 hci_stack->local_supported_commands[0] = 1536 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1537 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1538 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1539 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1540 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1541 } 1542 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1543 if (packet[5] == 0){ 1544 hci_stack->synchronous_flow_control_enabled = 1; 1545 } 1546 } 1547 break; 1548 1549 case HCI_EVENT_COMMAND_STATUS: 1550 // get num cmd packets - limit to 1 to reduce complexity 1551 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1552 break; 1553 1554 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1555 int offset = 3; 1556 for (i=0; i<packet[2];i++){ 1557 handle = little_endian_read_16(packet, offset); 1558 offset += 2; 1559 uint16_t num_packets = little_endian_read_16(packet, offset); 1560 offset += 2; 1561 1562 conn = hci_connection_for_handle(handle); 1563 if (!conn){ 1564 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1565 continue; 1566 } 1567 1568 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1569 #ifdef ENABLE_CLASSIC 1570 if (conn->num_sco_packets_sent >= num_packets){ 1571 conn->num_sco_packets_sent -= num_packets; 1572 } else { 1573 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1574 conn->num_sco_packets_sent = 0; 1575 } 1576 hci_notify_if_sco_can_send_now(); 1577 #endif 1578 } else { 1579 if (conn->num_acl_packets_sent >= num_packets){ 1580 conn->num_acl_packets_sent -= num_packets; 1581 } else { 1582 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1583 conn->num_acl_packets_sent = 0; 1584 } 1585 } 1586 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1587 } 1588 break; 1589 } 1590 1591 #ifdef ENABLE_CLASSIC 1592 case HCI_EVENT_CONNECTION_REQUEST: 1593 reverse_bd_addr(&packet[2], addr); 1594 // TODO: eval COD 8-10 1595 link_type = packet[11]; 1596 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1597 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1598 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1599 if (!conn) { 1600 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1601 } 1602 if (!conn) { 1603 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1604 hci_stack->decline_reason = 0x0d; 1605 bd_addr_copy(hci_stack->decline_addr, addr); 1606 break; 1607 } 1608 conn->role = HCI_ROLE_SLAVE; 1609 conn->state = RECEIVED_CONNECTION_REQUEST; 1610 // store info about eSCO 1611 if (link_type == 0x02){ 1612 conn->remote_supported_feature_eSCO = 1; 1613 } 1614 hci_run(); 1615 break; 1616 1617 case HCI_EVENT_CONNECTION_COMPLETE: 1618 // Connection management 1619 reverse_bd_addr(&packet[5], addr); 1620 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1621 addr_type = BD_ADDR_TYPE_CLASSIC; 1622 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1623 if (conn) { 1624 if (!packet[2]){ 1625 conn->state = OPEN; 1626 conn->con_handle = little_endian_read_16(packet, 3); 1627 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1628 1629 // restart timer 1630 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1631 btstack_run_loop_add_timer(&conn->timeout); 1632 1633 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1634 1635 hci_emit_nr_connections_changed(); 1636 } else { 1637 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1638 uint8_t status = packet[2]; 1639 bd_addr_t bd_address; 1640 memcpy(&bd_address, conn->address, 6); 1641 1642 // connection failed, remove entry 1643 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1644 btstack_memory_hci_connection_free( conn ); 1645 1646 // notify client if dedicated bonding 1647 if (notify_dedicated_bonding_failed){ 1648 log_info("hci notify_dedicated_bonding_failed"); 1649 hci_emit_dedicated_bonding_result(bd_address, status); 1650 } 1651 1652 // if authentication error, also delete link key 1653 if (packet[2] == 0x05) { 1654 gap_drop_link_key_for_bd_addr(addr); 1655 } 1656 } 1657 } 1658 break; 1659 1660 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1661 reverse_bd_addr(&packet[5], addr); 1662 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1663 if (packet[2]){ 1664 // connection failed 1665 break; 1666 } 1667 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1668 if (!conn) { 1669 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1670 } 1671 if (!conn) { 1672 break; 1673 } 1674 conn->state = OPEN; 1675 conn->con_handle = little_endian_read_16(packet, 3); 1676 break; 1677 1678 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1679 handle = little_endian_read_16(packet, 3); 1680 conn = hci_connection_for_handle(handle); 1681 if (!conn) break; 1682 if (!packet[2]){ 1683 uint8_t * features = &packet[5]; 1684 if (features[6] & (1 << 3)){ 1685 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1686 } 1687 if (features[3] & (1<<7)){ 1688 conn->remote_supported_feature_eSCO = 1; 1689 } 1690 } 1691 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1692 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1693 if (conn->bonding_flags & BONDING_DEDICATED){ 1694 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1695 } 1696 break; 1697 1698 case HCI_EVENT_LINK_KEY_REQUEST: 1699 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1700 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1701 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1702 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1703 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1704 hci_run(); 1705 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1706 return; 1707 1708 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1709 reverse_bd_addr(&packet[2], addr); 1710 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1711 if (!conn) break; 1712 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1713 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1714 // Change Connection Encryption keeps link key type 1715 if (link_key_type != CHANGED_COMBINATION_KEY){ 1716 conn->link_key_type = link_key_type; 1717 } 1718 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1719 // still forward event to allow dismiss of pairing dialog 1720 break; 1721 } 1722 1723 case HCI_EVENT_PIN_CODE_REQUEST: 1724 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1725 // non-bondable mode: pin code negative reply will be sent 1726 if (!hci_stack->bondable){ 1727 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1728 hci_run(); 1729 return; 1730 } 1731 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1732 if (!hci_stack->link_key_db) break; 1733 hci_event_pin_code_request_get_bd_addr(packet, addr); 1734 hci_stack->link_key_db->delete_link_key(addr); 1735 break; 1736 1737 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1738 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1739 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1740 break; 1741 1742 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1743 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1744 if (!hci_stack->ssp_auto_accept) break; 1745 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1746 break; 1747 1748 case HCI_EVENT_USER_PASSKEY_REQUEST: 1749 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1750 if (!hci_stack->ssp_auto_accept) break; 1751 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1752 break; 1753 #endif 1754 1755 case HCI_EVENT_ENCRYPTION_CHANGE: 1756 handle = little_endian_read_16(packet, 3); 1757 conn = hci_connection_for_handle(handle); 1758 if (!conn) break; 1759 if (packet[2] == 0) { 1760 if (packet[5]){ 1761 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1762 } else { 1763 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1764 } 1765 } 1766 #ifdef ENABLE_CLASSIC 1767 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1768 #endif 1769 break; 1770 1771 #ifdef ENABLE_CLASSIC 1772 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1773 handle = little_endian_read_16(packet, 3); 1774 conn = hci_connection_for_handle(handle); 1775 if (!conn) break; 1776 1777 // dedicated bonding: send result and disconnect 1778 if (conn->bonding_flags & BONDING_DEDICATED){ 1779 conn->bonding_flags &= ~BONDING_DEDICATED; 1780 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1781 conn->bonding_status = packet[2]; 1782 break; 1783 } 1784 1785 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1786 // link key sufficient for requested security 1787 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1788 break; 1789 } 1790 // not enough 1791 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1792 break; 1793 #endif 1794 1795 // HCI_EVENT_DISCONNECTION_COMPLETE 1796 // has been split, to first notify stack before shutting connection down 1797 // see end of function, too. 1798 case HCI_EVENT_DISCONNECTION_COMPLETE: 1799 if (packet[2]) break; // status != 0 1800 handle = little_endian_read_16(packet, 3); 1801 // drop outgoing ACL fragments if it is for closed connection 1802 if (hci_stack->acl_fragmentation_total_size > 0) { 1803 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1804 log_info("hci: drop fragmented ACL data for closed connection"); 1805 hci_stack->acl_fragmentation_total_size = 0; 1806 hci_stack->acl_fragmentation_pos = 0; 1807 } 1808 } 1809 1810 // re-enable advertisements for le connections if active 1811 conn = hci_connection_for_handle(handle); 1812 if (!conn) break; 1813 #ifdef ENABLE_BLE 1814 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1815 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1816 } 1817 #endif 1818 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1819 break; 1820 1821 case HCI_EVENT_HARDWARE_ERROR: 1822 log_error("Hardware Error: 0x%02x", packet[2]); 1823 if (hci_stack->hardware_error_callback){ 1824 (*hci_stack->hardware_error_callback)(packet[2]); 1825 } else { 1826 // if no special requests, just reboot stack 1827 hci_power_control_off(); 1828 hci_power_control_on(); 1829 } 1830 break; 1831 1832 case HCI_EVENT_ROLE_CHANGE: 1833 if (packet[2]) break; // status != 0 1834 handle = little_endian_read_16(packet, 3); 1835 conn = hci_connection_for_handle(handle); 1836 if (!conn) break; // no conn 1837 conn->role = packet[9]; 1838 break; 1839 1840 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1841 // release packet buffer only for asynchronous transport and if there are not further fragements 1842 if (hci_transport_synchronous()) { 1843 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1844 return; // instead of break: to avoid re-entering hci_run() 1845 } 1846 if (hci_stack->acl_fragmentation_total_size) break; 1847 hci_release_packet_buffer(); 1848 1849 // L2CAP receives this event via the hci_emit_event below 1850 1851 #ifdef ENABLE_CLASSIC 1852 // For SCO, we do the can_send_now_check here 1853 hci_notify_if_sco_can_send_now(); 1854 #endif 1855 break; 1856 1857 #ifdef ENABLE_CLASSIC 1858 case HCI_EVENT_SCO_CAN_SEND_NOW: 1859 // For SCO, we do the can_send_now_check here 1860 hci_notify_if_sco_can_send_now(); 1861 return; 1862 #endif 1863 1864 #ifdef ENABLE_BLE 1865 case HCI_EVENT_LE_META: 1866 switch (packet[2]){ 1867 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1868 // log_info("advertising report received"); 1869 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1870 le_handle_advertisement_report(packet, size); 1871 break; 1872 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1873 // Connection management 1874 reverse_bd_addr(&packet[8], addr); 1875 addr_type = (bd_addr_type_t)packet[7]; 1876 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1877 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1878 // if auto-connect, remove from whitelist in both roles 1879 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1880 hci_remove_from_whitelist(addr_type, addr); 1881 } 1882 // handle error: error is reported only to the initiator -> outgoing connection 1883 if (packet[3]){ 1884 // outgoing connection establishment is done 1885 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1886 // remove entry 1887 if (conn){ 1888 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1889 btstack_memory_hci_connection_free( conn ); 1890 } 1891 break; 1892 } 1893 // on success, both hosts receive connection complete event 1894 if (packet[6] == HCI_ROLE_MASTER){ 1895 // if we're master, it was an outgoing connection and we're done with it 1896 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1897 } else { 1898 // if we're slave, it was an incoming connection, advertisements have stopped 1899 hci_stack->le_advertisements_active = 0; 1900 // try to re-enable them 1901 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1902 } 1903 // LE connections are auto-accepted, so just create a connection if there isn't one already 1904 if (!conn){ 1905 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1906 } 1907 // no memory, sorry. 1908 if (!conn){ 1909 break; 1910 } 1911 1912 conn->state = OPEN; 1913 conn->role = packet[6]; 1914 conn->con_handle = little_endian_read_16(packet, 4); 1915 1916 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1917 1918 // restart timer 1919 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1920 // btstack_run_loop_add_timer(&conn->timeout); 1921 1922 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1923 1924 hci_emit_nr_connections_changed(); 1925 break; 1926 1927 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1928 1929 default: 1930 break; 1931 } 1932 break; 1933 #endif 1934 default: 1935 break; 1936 } 1937 1938 // handle BT initialization 1939 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1940 hci_initializing_event_handler(packet, size); 1941 } 1942 1943 // help with BT sleep 1944 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1945 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1946 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1947 hci_initializing_next_state(); 1948 } 1949 1950 // notify upper stack 1951 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1952 1953 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1954 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1955 if (!packet[2]){ 1956 handle = little_endian_read_16(packet, 3); 1957 hci_connection_t * aConn = hci_connection_for_handle(handle); 1958 if (aConn) { 1959 uint8_t status = aConn->bonding_status; 1960 uint16_t flags = aConn->bonding_flags; 1961 bd_addr_t bd_address; 1962 memcpy(&bd_address, aConn->address, 6); 1963 hci_shutdown_connection(aConn); 1964 // connection struct is gone, don't access anymore 1965 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1966 hci_emit_dedicated_bonding_result(bd_address, status); 1967 } 1968 } 1969 } 1970 } 1971 1972 // execute main loop 1973 hci_run(); 1974 } 1975 1976 #ifdef ENABLE_CLASSIC 1977 static void sco_handler(uint8_t * packet, uint16_t size){ 1978 if (!hci_stack->sco_packet_handler) return; 1979 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1980 } 1981 #endif 1982 1983 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1984 hci_dump_packet(packet_type, 1, packet, size); 1985 switch (packet_type) { 1986 case HCI_EVENT_PACKET: 1987 event_handler(packet, size); 1988 break; 1989 case HCI_ACL_DATA_PACKET: 1990 acl_handler(packet, size); 1991 break; 1992 #ifdef ENABLE_CLASSIC 1993 case HCI_SCO_DATA_PACKET: 1994 sco_handler(packet, size); 1995 break; 1996 #endif 1997 default: 1998 break; 1999 } 2000 } 2001 2002 /** 2003 * @brief Add event packet handler. 2004 */ 2005 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2006 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2007 } 2008 2009 2010 /** Register HCI packet handlers */ 2011 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2012 hci_stack->acl_packet_handler = handler; 2013 } 2014 2015 #ifdef ENABLE_CLASSIC 2016 /** 2017 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2018 */ 2019 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2020 hci_stack->sco_packet_handler = handler; 2021 } 2022 #endif 2023 2024 static void hci_state_reset(void){ 2025 // no connections yet 2026 hci_stack->connections = NULL; 2027 2028 // keep discoverable/connectable as this has been requested by the client(s) 2029 // hci_stack->discoverable = 0; 2030 // hci_stack->connectable = 0; 2031 // hci_stack->bondable = 1; 2032 2033 // buffer is free 2034 hci_stack->hci_packet_buffer_reserved = 0; 2035 2036 // no pending cmds 2037 hci_stack->decline_reason = 0; 2038 hci_stack->new_scan_enable_value = 0xff; 2039 2040 // LE 2041 hci_stack->adv_addr_type = 0; 2042 hci_stack->le_advertisements_random_address_set = 0; 2043 memset(hci_stack->adv_address, 0, 6); 2044 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2045 hci_stack->le_scan_type = 0xff; 2046 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2047 hci_stack->le_whitelist = 0; 2048 hci_stack->le_whitelist_capacity = 0; 2049 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2050 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2051 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2052 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2053 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2054 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2055 } 2056 2057 #ifdef ENABLE_CLASSIC 2058 /** 2059 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2060 */ 2061 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2062 // store and open remote device db 2063 hci_stack->link_key_db = link_key_db; 2064 if (hci_stack->link_key_db) { 2065 hci_stack->link_key_db->open(); 2066 } 2067 } 2068 #endif 2069 2070 void hci_init(const hci_transport_t *transport, const void *config){ 2071 2072 #ifdef HAVE_MALLOC 2073 if (!hci_stack) { 2074 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2075 } 2076 #else 2077 hci_stack = &hci_stack_static; 2078 #endif 2079 memset(hci_stack, 0, sizeof(hci_stack_t)); 2080 2081 // reference to use transport layer implementation 2082 hci_stack->hci_transport = transport; 2083 2084 // reference to used config 2085 hci_stack->config = config; 2086 2087 // setup pointer for outgoing packet buffer 2088 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2089 2090 // max acl payload size defined in config.h 2091 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2092 2093 // register packet handlers with transport 2094 transport->register_packet_handler(&packet_handler); 2095 2096 hci_stack->state = HCI_STATE_OFF; 2097 2098 // class of device 2099 hci_stack->class_of_device = 0x007a020c; // Smartphone 2100 2101 // bondable by default 2102 hci_stack->bondable = 1; 2103 2104 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2105 hci_stack->ssp_enable = 1; 2106 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2107 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2108 hci_stack->ssp_auto_accept = 1; 2109 2110 // voice setting - signed 8 bit pcm data with CVSD over the air 2111 hci_stack->sco_voice_setting = 0x40; 2112 2113 hci_state_reset(); 2114 } 2115 2116 /** 2117 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2118 */ 2119 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2120 hci_stack->chipset = chipset_driver; 2121 2122 // reset chipset driver - init is also called on power_up 2123 if (hci_stack->chipset && hci_stack->chipset->init){ 2124 hci_stack->chipset->init(hci_stack->config); 2125 } 2126 } 2127 2128 /** 2129 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2130 */ 2131 void hci_set_control(const btstack_control_t *hardware_control){ 2132 // references to used control implementation 2133 hci_stack->control = hardware_control; 2134 // init with transport config 2135 hardware_control->init(hci_stack->config); 2136 } 2137 2138 void hci_close(void){ 2139 // close remote device db 2140 if (hci_stack->link_key_db) { 2141 hci_stack->link_key_db->close(); 2142 } 2143 2144 btstack_linked_list_iterator_t lit; 2145 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2146 while (btstack_linked_list_iterator_has_next(&lit)){ 2147 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2148 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2149 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2150 hci_shutdown_connection(connection); 2151 } 2152 2153 hci_power_control(HCI_POWER_OFF); 2154 2155 #ifdef HAVE_MALLOC 2156 free(hci_stack); 2157 #endif 2158 hci_stack = NULL; 2159 } 2160 2161 #ifdef ENABLE_CLASSIC 2162 void gap_set_class_of_device(uint32_t class_of_device){ 2163 hci_stack->class_of_device = class_of_device; 2164 } 2165 #endif 2166 2167 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2168 void hci_set_bd_addr(bd_addr_t addr){ 2169 memcpy(hci_stack->custom_bd_addr, addr, 6); 2170 hci_stack->custom_bd_addr_set = 1; 2171 } 2172 2173 void hci_disable_l2cap_timeout_check(void){ 2174 disable_l2cap_timeouts = 1; 2175 } 2176 // State-Module-Driver overview 2177 // state module low-level 2178 // HCI_STATE_OFF off close 2179 // HCI_STATE_INITIALIZING, on open 2180 // HCI_STATE_WORKING, on open 2181 // HCI_STATE_HALTING, on open 2182 // HCI_STATE_SLEEPING, off/sleep close 2183 // HCI_STATE_FALLING_ASLEEP on open 2184 2185 static int hci_power_control_on(void){ 2186 2187 // power on 2188 int err = 0; 2189 if (hci_stack->control && hci_stack->control->on){ 2190 err = (*hci_stack->control->on)(); 2191 } 2192 if (err){ 2193 log_error( "POWER_ON failed"); 2194 hci_emit_hci_open_failed(); 2195 return err; 2196 } 2197 2198 // int chipset driver 2199 if (hci_stack->chipset && hci_stack->chipset->init){ 2200 hci_stack->chipset->init(hci_stack->config); 2201 } 2202 2203 // init transport 2204 if (hci_stack->hci_transport->init){ 2205 hci_stack->hci_transport->init(hci_stack->config); 2206 } 2207 2208 // open transport 2209 err = hci_stack->hci_transport->open(); 2210 if (err){ 2211 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2212 if (hci_stack->control && hci_stack->control->off){ 2213 (*hci_stack->control->off)(); 2214 } 2215 hci_emit_hci_open_failed(); 2216 return err; 2217 } 2218 return 0; 2219 } 2220 2221 static void hci_power_control_off(void){ 2222 2223 log_info("hci_power_control_off"); 2224 2225 // close low-level device 2226 hci_stack->hci_transport->close(); 2227 2228 log_info("hci_power_control_off - hci_transport closed"); 2229 2230 // power off 2231 if (hci_stack->control && hci_stack->control->off){ 2232 (*hci_stack->control->off)(); 2233 } 2234 2235 log_info("hci_power_control_off - control closed"); 2236 2237 hci_stack->state = HCI_STATE_OFF; 2238 } 2239 2240 static void hci_power_control_sleep(void){ 2241 2242 log_info("hci_power_control_sleep"); 2243 2244 #if 0 2245 // don't close serial port during sleep 2246 2247 // close low-level device 2248 hci_stack->hci_transport->close(hci_stack->config); 2249 #endif 2250 2251 // sleep mode 2252 if (hci_stack->control && hci_stack->control->sleep){ 2253 (*hci_stack->control->sleep)(); 2254 } 2255 2256 hci_stack->state = HCI_STATE_SLEEPING; 2257 } 2258 2259 static int hci_power_control_wake(void){ 2260 2261 log_info("hci_power_control_wake"); 2262 2263 // wake on 2264 if (hci_stack->control && hci_stack->control->wake){ 2265 (*hci_stack->control->wake)(); 2266 } 2267 2268 #if 0 2269 // open low-level device 2270 int err = hci_stack->hci_transport->open(hci_stack->config); 2271 if (err){ 2272 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2273 if (hci_stack->control && hci_stack->control->off){ 2274 (*hci_stack->control->off)(); 2275 } 2276 hci_emit_hci_open_failed(); 2277 return err; 2278 } 2279 #endif 2280 2281 return 0; 2282 } 2283 2284 static void hci_power_transition_to_initializing(void){ 2285 // set up state machine 2286 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2287 hci_stack->hci_packet_buffer_reserved = 0; 2288 hci_stack->state = HCI_STATE_INITIALIZING; 2289 hci_stack->substate = HCI_INIT_SEND_RESET; 2290 } 2291 2292 int hci_power_control(HCI_POWER_MODE power_mode){ 2293 2294 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2295 2296 int err = 0; 2297 switch (hci_stack->state){ 2298 2299 case HCI_STATE_OFF: 2300 switch (power_mode){ 2301 case HCI_POWER_ON: 2302 err = hci_power_control_on(); 2303 if (err) { 2304 log_error("hci_power_control_on() error %d", err); 2305 return err; 2306 } 2307 hci_power_transition_to_initializing(); 2308 break; 2309 case HCI_POWER_OFF: 2310 // do nothing 2311 break; 2312 case HCI_POWER_SLEEP: 2313 // do nothing (with SLEEP == OFF) 2314 break; 2315 } 2316 break; 2317 2318 case HCI_STATE_INITIALIZING: 2319 switch (power_mode){ 2320 case HCI_POWER_ON: 2321 // do nothing 2322 break; 2323 case HCI_POWER_OFF: 2324 // no connections yet, just turn it off 2325 hci_power_control_off(); 2326 break; 2327 case HCI_POWER_SLEEP: 2328 // no connections yet, just turn it off 2329 hci_power_control_sleep(); 2330 break; 2331 } 2332 break; 2333 2334 case HCI_STATE_WORKING: 2335 switch (power_mode){ 2336 case HCI_POWER_ON: 2337 // do nothing 2338 break; 2339 case HCI_POWER_OFF: 2340 // see hci_run 2341 hci_stack->state = HCI_STATE_HALTING; 2342 break; 2343 case HCI_POWER_SLEEP: 2344 // see hci_run 2345 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2346 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2347 break; 2348 } 2349 break; 2350 2351 case HCI_STATE_HALTING: 2352 switch (power_mode){ 2353 case HCI_POWER_ON: 2354 hci_power_transition_to_initializing(); 2355 break; 2356 case HCI_POWER_OFF: 2357 // do nothing 2358 break; 2359 case HCI_POWER_SLEEP: 2360 // see hci_run 2361 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2362 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2363 break; 2364 } 2365 break; 2366 2367 case HCI_STATE_FALLING_ASLEEP: 2368 switch (power_mode){ 2369 case HCI_POWER_ON: 2370 2371 #ifdef HAVE_PLATFORM_IPHONE_OS 2372 // nothing to do, if H4 supports power management 2373 if (btstack_control_iphone_power_management_enabled()){ 2374 hci_stack->state = HCI_STATE_INITIALIZING; 2375 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2376 break; 2377 } 2378 #endif 2379 hci_power_transition_to_initializing(); 2380 break; 2381 case HCI_POWER_OFF: 2382 // see hci_run 2383 hci_stack->state = HCI_STATE_HALTING; 2384 break; 2385 case HCI_POWER_SLEEP: 2386 // do nothing 2387 break; 2388 } 2389 break; 2390 2391 case HCI_STATE_SLEEPING: 2392 switch (power_mode){ 2393 case HCI_POWER_ON: 2394 2395 #ifdef HAVE_PLATFORM_IPHONE_OS 2396 // nothing to do, if H4 supports power management 2397 if (btstack_control_iphone_power_management_enabled()){ 2398 hci_stack->state = HCI_STATE_INITIALIZING; 2399 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2400 hci_update_scan_enable(); 2401 break; 2402 } 2403 #endif 2404 err = hci_power_control_wake(); 2405 if (err) return err; 2406 hci_power_transition_to_initializing(); 2407 break; 2408 case HCI_POWER_OFF: 2409 hci_stack->state = HCI_STATE_HALTING; 2410 break; 2411 case HCI_POWER_SLEEP: 2412 // do nothing 2413 break; 2414 } 2415 break; 2416 } 2417 2418 // create internal event 2419 hci_emit_state(); 2420 2421 // trigger next/first action 2422 hci_run(); 2423 2424 return 0; 2425 } 2426 2427 2428 #ifdef ENABLE_CLASSIC 2429 2430 static void hci_update_scan_enable(void){ 2431 // 2 = page scan, 1 = inq scan 2432 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2433 hci_run(); 2434 } 2435 2436 void gap_discoverable_control(uint8_t enable){ 2437 if (enable) enable = 1; // normalize argument 2438 2439 if (hci_stack->discoverable == enable){ 2440 hci_emit_discoverable_enabled(hci_stack->discoverable); 2441 return; 2442 } 2443 2444 hci_stack->discoverable = enable; 2445 hci_update_scan_enable(); 2446 } 2447 2448 void gap_connectable_control(uint8_t enable){ 2449 if (enable) enable = 1; // normalize argument 2450 2451 // don't emit event 2452 if (hci_stack->connectable == enable) return; 2453 2454 hci_stack->connectable = enable; 2455 hci_update_scan_enable(); 2456 } 2457 #endif 2458 2459 void gap_local_bd_addr(bd_addr_t address_buffer){ 2460 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2461 } 2462 2463 static void hci_run(void){ 2464 2465 // log_info("hci_run: entered"); 2466 btstack_linked_item_t * it; 2467 2468 // send continuation fragments first, as they block the prepared packet buffer 2469 if (hci_stack->acl_fragmentation_total_size > 0) { 2470 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2471 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2472 if (connection) { 2473 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2474 hci_send_acl_packet_fragments(connection); 2475 return; 2476 } 2477 } else { 2478 // connection gone -> discard further fragments 2479 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2480 hci_stack->acl_fragmentation_total_size = 0; 2481 hci_stack->acl_fragmentation_pos = 0; 2482 } 2483 } 2484 2485 if (!hci_can_send_command_packet_now()) return; 2486 2487 // global/non-connection oriented commands 2488 2489 #ifdef ENABLE_CLASSIC 2490 // decline incoming connections 2491 if (hci_stack->decline_reason){ 2492 uint8_t reason = hci_stack->decline_reason; 2493 hci_stack->decline_reason = 0; 2494 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2495 return; 2496 } 2497 2498 // send scan enable 2499 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2500 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2501 hci_stack->new_scan_enable_value = 0xff; 2502 return; 2503 } 2504 #endif 2505 2506 #ifdef ENABLE_BLE 2507 if (hci_stack->state == HCI_STATE_WORKING){ 2508 // handle le scan 2509 switch(hci_stack->le_scanning_state){ 2510 case LE_START_SCAN: 2511 hci_stack->le_scanning_state = LE_SCANNING; 2512 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2513 return; 2514 2515 case LE_STOP_SCAN: 2516 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2517 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2518 return; 2519 default: 2520 break; 2521 } 2522 if (hci_stack->le_scan_type != 0xff){ 2523 // defaults: active scanning, accept all advertisement packets 2524 int scan_type = hci_stack->le_scan_type; 2525 hci_stack->le_scan_type = 0xff; 2526 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); 2527 return; 2528 } 2529 // le advertisement control 2530 if (hci_stack->le_advertisements_todo){ 2531 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2532 } 2533 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2534 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2535 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2536 return; 2537 } 2538 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2539 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2540 hci_send_cmd(&hci_le_set_advertising_parameters, 2541 hci_stack->le_advertisements_interval_min, 2542 hci_stack->le_advertisements_interval_max, 2543 hci_stack->le_advertisements_type, 2544 hci_stack->le_advertisements_own_address_type, 2545 hci_stack->le_advertisements_direct_address_type, 2546 hci_stack->le_advertisements_direct_address, 2547 hci_stack->le_advertisements_channel_map, 2548 hci_stack->le_advertisements_filter_policy); 2549 return; 2550 } 2551 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2552 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2553 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2554 hci_stack->le_advertisements_data); 2555 return; 2556 } 2557 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2558 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2559 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2560 hci_stack->le_scan_response_data); 2561 return; 2562 } 2563 // Random address needs to be set before enabling advertisements 2564 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE) 2565 && (hci_stack->le_advertisements_own_address_type == 0 || hci_stack->le_advertisements_random_address_set)){ 2566 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2567 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2568 return; 2569 } 2570 2571 // 2572 // LE Whitelist Management 2573 // 2574 2575 // check if whitelist needs modification 2576 btstack_linked_list_iterator_t lit; 2577 int modification_pending = 0; 2578 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2579 while (btstack_linked_list_iterator_has_next(&lit)){ 2580 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2581 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2582 modification_pending = 1; 2583 break; 2584 } 2585 } 2586 2587 if (modification_pending){ 2588 // stop connnecting if modification pending 2589 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2590 hci_send_cmd(&hci_le_create_connection_cancel); 2591 return; 2592 } 2593 2594 // add/remove entries 2595 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2596 while (btstack_linked_list_iterator_has_next(&lit)){ 2597 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2598 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2599 entry->state = LE_WHITELIST_ON_CONTROLLER; 2600 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2601 return; 2602 2603 } 2604 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2605 bd_addr_t address; 2606 bd_addr_type_t address_type = entry->address_type; 2607 memcpy(address, entry->address, 6); 2608 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2609 btstack_memory_whitelist_entry_free(entry); 2610 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2611 return; 2612 } 2613 } 2614 } 2615 2616 // start connecting 2617 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2618 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2619 bd_addr_t null_addr; 2620 memset(null_addr, 0, 6); 2621 hci_send_cmd(&hci_le_create_connection, 2622 0x0060, // scan interval: 60 ms 2623 0x0030, // scan interval: 30 ms 2624 1, // use whitelist 2625 0, // peer address type 2626 null_addr, // peer bd addr 2627 hci_stack->adv_addr_type, // our addr type: 2628 0x0008, // conn interval min 2629 0x0018, // conn interval max 2630 0, // conn latency 2631 0x0048, // supervision timeout 2632 0x0001, // min ce length 2633 0x0001 // max ce length 2634 ); 2635 return; 2636 } 2637 } 2638 #endif 2639 2640 // send pending HCI commands 2641 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2642 hci_connection_t * connection = (hci_connection_t *) it; 2643 2644 switch(connection->state){ 2645 case SEND_CREATE_CONNECTION: 2646 switch(connection->address_type){ 2647 #ifdef ENABLE_CLASSIC 2648 case BD_ADDR_TYPE_CLASSIC: 2649 log_info("sending hci_create_connection"); 2650 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2651 break; 2652 #endif 2653 default: 2654 #ifdef ENABLE_BLE 2655 log_info("sending hci_le_create_connection"); 2656 hci_send_cmd(&hci_le_create_connection, 2657 0x0060, // scan interval: 60 ms 2658 0x0030, // scan interval: 30 ms 2659 0, // don't use whitelist 2660 connection->address_type, // peer address type 2661 connection->address, // peer bd addr 2662 hci_stack->adv_addr_type, // our addr type: 2663 0x0008, // conn interval min 2664 0x0018, // conn interval max 2665 0, // conn latency 2666 0x0048, // supervision timeout 2667 0x0001, // min ce length 2668 0x0001 // max ce length 2669 ); 2670 2671 connection->state = SENT_CREATE_CONNECTION; 2672 #endif 2673 break; 2674 } 2675 return; 2676 2677 #ifdef ENABLE_CLASSIC 2678 case RECEIVED_CONNECTION_REQUEST: 2679 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2680 connection->state = ACCEPTED_CONNECTION_REQUEST; 2681 connection->role = HCI_ROLE_SLAVE; 2682 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2683 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2684 } 2685 return; 2686 #endif 2687 2688 #ifdef ENABLE_BLE 2689 case SEND_CANCEL_CONNECTION: 2690 connection->state = SENT_CANCEL_CONNECTION; 2691 hci_send_cmd(&hci_le_create_connection_cancel); 2692 return; 2693 #endif 2694 case SEND_DISCONNECT: 2695 connection->state = SENT_DISCONNECT; 2696 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2697 return; 2698 2699 default: 2700 break; 2701 } 2702 2703 #ifdef ENABLE_CLASSIC 2704 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2705 log_info("responding to link key request"); 2706 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2707 link_key_t link_key; 2708 link_key_type_t link_key_type; 2709 if ( hci_stack->link_key_db 2710 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2711 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2712 connection->link_key_type = link_key_type; 2713 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2714 } else { 2715 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2716 } 2717 return; 2718 } 2719 2720 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2721 log_info("denying to pin request"); 2722 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2723 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2724 return; 2725 } 2726 2727 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2728 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2729 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2730 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2731 // tweak authentication requirements 2732 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2733 if (connection->bonding_flags & BONDING_DEDICATED){ 2734 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2735 } 2736 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2737 authreq |= 1; 2738 } 2739 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2740 } else { 2741 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2742 } 2743 return; 2744 } 2745 2746 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2747 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2748 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2749 return; 2750 } 2751 2752 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2753 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2754 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2755 return; 2756 } 2757 #endif 2758 2759 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2760 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2761 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2762 return; 2763 } 2764 2765 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2766 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2767 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2768 return; 2769 } 2770 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2771 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2772 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2773 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2774 return; 2775 } 2776 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2777 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2778 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2779 return; 2780 } 2781 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2782 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2783 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2784 return; 2785 } 2786 2787 #ifdef ENABLE_BLE 2788 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2789 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2790 2791 uint16_t connection_interval_min = connection->le_conn_interval_min; 2792 connection->le_conn_interval_min = 0; 2793 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2794 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2795 0x0000, 0xffff); 2796 } 2797 #endif 2798 } 2799 2800 hci_connection_t * connection; 2801 switch (hci_stack->state){ 2802 case HCI_STATE_INITIALIZING: 2803 hci_initializing_run(); 2804 break; 2805 2806 case HCI_STATE_HALTING: 2807 2808 log_info("HCI_STATE_HALTING"); 2809 2810 // free whitelist entries 2811 #ifdef ENABLE_BLE 2812 { 2813 btstack_linked_list_iterator_t lit; 2814 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2815 while (btstack_linked_list_iterator_has_next(&lit)){ 2816 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2817 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2818 btstack_memory_whitelist_entry_free(entry); 2819 } 2820 } 2821 #endif 2822 // close all open connections 2823 connection = (hci_connection_t *) hci_stack->connections; 2824 if (connection){ 2825 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2826 if (!hci_can_send_command_packet_now()) return; 2827 2828 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2829 2830 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2831 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2832 2833 // ... which would be ignored anyway as we shutdown (free) the connection now 2834 hci_shutdown_connection(connection); 2835 2836 // finally, send the disconnect command 2837 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2838 return; 2839 } 2840 log_info("HCI_STATE_HALTING, calling off"); 2841 2842 // switch mode 2843 hci_power_control_off(); 2844 2845 log_info("HCI_STATE_HALTING, emitting state"); 2846 hci_emit_state(); 2847 log_info("HCI_STATE_HALTING, done"); 2848 break; 2849 2850 case HCI_STATE_FALLING_ASLEEP: 2851 switch(hci_stack->substate) { 2852 case HCI_FALLING_ASLEEP_DISCONNECT: 2853 log_info("HCI_STATE_FALLING_ASLEEP"); 2854 // close all open connections 2855 connection = (hci_connection_t *) hci_stack->connections; 2856 2857 #ifdef HAVE_PLATFORM_IPHONE_OS 2858 // don't close connections, if H4 supports power management 2859 if (btstack_control_iphone_power_management_enabled()){ 2860 connection = NULL; 2861 } 2862 #endif 2863 if (connection){ 2864 2865 // send disconnect 2866 if (!hci_can_send_command_packet_now()) return; 2867 2868 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2869 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2870 2871 // send disconnected event right away - causes higher layer connections to get closed, too. 2872 hci_shutdown_connection(connection); 2873 return; 2874 } 2875 2876 if (hci_classic_supported()){ 2877 // disable page and inquiry scan 2878 if (!hci_can_send_command_packet_now()) return; 2879 2880 log_info("HCI_STATE_HALTING, disabling inq scans"); 2881 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2882 2883 // continue in next sub state 2884 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2885 break; 2886 } 2887 // no break - fall through for ble-only chips 2888 2889 case HCI_FALLING_ASLEEP_COMPLETE: 2890 log_info("HCI_STATE_HALTING, calling sleep"); 2891 #ifdef HAVE_PLATFORM_IPHONE_OS 2892 // don't actually go to sleep, if H4 supports power management 2893 if (btstack_control_iphone_power_management_enabled()){ 2894 // SLEEP MODE reached 2895 hci_stack->state = HCI_STATE_SLEEPING; 2896 hci_emit_state(); 2897 break; 2898 } 2899 #endif 2900 // switch mode 2901 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2902 hci_emit_state(); 2903 break; 2904 2905 default: 2906 break; 2907 } 2908 break; 2909 2910 default: 2911 break; 2912 } 2913 } 2914 2915 int hci_send_cmd_packet(uint8_t *packet, int size){ 2916 // house-keeping 2917 2918 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2919 hci_stack->loopback_mode = packet[3]; 2920 } 2921 2922 #ifdef ENABLE_CLASSIC 2923 bd_addr_t addr; 2924 hci_connection_t * conn; 2925 2926 // create_connection? 2927 if (IS_COMMAND(packet, hci_create_connection)){ 2928 reverse_bd_addr(&packet[3], addr); 2929 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2930 2931 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2932 if (!conn){ 2933 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2934 if (!conn){ 2935 // notify client that alloc failed 2936 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2937 return 0; // don't sent packet to controller 2938 } 2939 conn->state = SEND_CREATE_CONNECTION; 2940 } 2941 log_info("conn state %u", conn->state); 2942 switch (conn->state){ 2943 // if connection active exists 2944 case OPEN: 2945 // and OPEN, emit connection complete command, don't send to controller 2946 hci_emit_connection_complete(addr, conn->con_handle, 0); 2947 return 0; 2948 case SEND_CREATE_CONNECTION: 2949 // connection created by hci, e.g. dedicated bonding 2950 break; 2951 default: 2952 // otherwise, just ignore as it is already in the open process 2953 return 0; 2954 } 2955 conn->state = SENT_CREATE_CONNECTION; 2956 } 2957 2958 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2959 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2960 } 2961 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2962 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2963 } 2964 2965 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2966 if (hci_stack->link_key_db){ 2967 reverse_bd_addr(&packet[3], addr); 2968 hci_stack->link_key_db->delete_link_key(addr); 2969 } 2970 } 2971 2972 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2973 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2974 reverse_bd_addr(&packet[3], addr); 2975 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2976 if (conn){ 2977 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2978 } 2979 } 2980 2981 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2982 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2983 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2984 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2985 reverse_bd_addr(&packet[3], addr); 2986 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2987 if (conn){ 2988 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2989 } 2990 } 2991 #endif 2992 2993 #ifdef ENABLE_BLE 2994 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2995 hci_stack->adv_addr_type = packet[8]; 2996 } 2997 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2998 hci_stack->le_advertisements_random_address_set = 1; 2999 reverse_bd_addr(&packet[3], hci_stack->adv_address); 3000 } 3001 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3002 hci_stack->le_advertisements_active = packet[3]; 3003 } 3004 if (IS_COMMAND(packet, hci_le_create_connection)){ 3005 // white list used? 3006 uint8_t initiator_filter_policy = packet[7]; 3007 switch (initiator_filter_policy){ 3008 case 0: 3009 // whitelist not used 3010 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3011 break; 3012 case 1: 3013 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3014 break; 3015 default: 3016 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3017 break; 3018 } 3019 } 3020 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3021 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3022 } 3023 #endif 3024 3025 hci_stack->num_cmd_packets--; 3026 3027 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3028 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3029 3030 // release packet buffer for synchronous transport implementations 3031 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3032 hci_stack->hci_packet_buffer_reserved = 0; 3033 } 3034 3035 return err; 3036 } 3037 3038 // disconnect because of security block 3039 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3040 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3041 if (!connection) return; 3042 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3043 } 3044 3045 3046 // Configure Secure Simple Pairing 3047 3048 #ifdef ENABLE_CLASSIC 3049 3050 // enable will enable SSP during init 3051 void gap_ssp_set_enable(int enable){ 3052 hci_stack->ssp_enable = enable; 3053 } 3054 3055 static int hci_local_ssp_activated(void){ 3056 return gap_ssp_supported() && hci_stack->ssp_enable; 3057 } 3058 3059 // if set, BTstack will respond to io capability request using authentication requirement 3060 void gap_ssp_set_io_capability(int io_capability){ 3061 hci_stack->ssp_io_capability = io_capability; 3062 } 3063 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3064 hci_stack->ssp_authentication_requirement = authentication_requirement; 3065 } 3066 3067 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3068 void gap_ssp_set_auto_accept(int auto_accept){ 3069 hci_stack->ssp_auto_accept = auto_accept; 3070 } 3071 #endif 3072 3073 // va_list part of hci_send_cmd 3074 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3075 if (!hci_can_send_command_packet_now()){ 3076 log_error("hci_send_cmd called but cannot send packet now"); 3077 return 0; 3078 } 3079 3080 // for HCI INITIALIZATION 3081 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3082 hci_stack->last_cmd_opcode = cmd->opcode; 3083 3084 hci_reserve_packet_buffer(); 3085 uint8_t * packet = hci_stack->hci_packet_buffer; 3086 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3087 return hci_send_cmd_packet(packet, size); 3088 } 3089 3090 /** 3091 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3092 */ 3093 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3094 va_list argptr; 3095 va_start(argptr, cmd); 3096 int res = hci_send_cmd_va_arg(cmd, argptr); 3097 va_end(argptr); 3098 return res; 3099 } 3100 3101 // Create various non-HCI events. 3102 // TODO: generalize, use table similar to hci_create_command 3103 3104 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3105 // dump packet 3106 if (dump) { 3107 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3108 } 3109 3110 // dispatch to all event handlers 3111 btstack_linked_list_iterator_t it; 3112 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3113 while (btstack_linked_list_iterator_has_next(&it)){ 3114 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3115 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3116 } 3117 } 3118 3119 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3120 if (!hci_stack->acl_packet_handler) return; 3121 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3122 } 3123 3124 #ifdef ENABLE_CLASSIC 3125 static void hci_notify_if_sco_can_send_now(void){ 3126 // notify SCO sender if waiting 3127 if (!hci_stack->sco_waiting_for_can_send_now) return; 3128 if (hci_can_send_sco_packet_now()){ 3129 hci_stack->sco_waiting_for_can_send_now = 0; 3130 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3131 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3132 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3133 } 3134 } 3135 #endif 3136 3137 void hci_emit_state(void){ 3138 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3139 uint8_t event[3]; 3140 event[0] = BTSTACK_EVENT_STATE; 3141 event[1] = sizeof(event) - 2; 3142 event[2] = hci_stack->state; 3143 hci_emit_event(event, sizeof(event), 1); 3144 } 3145 3146 #ifdef ENABLE_CLASSIC 3147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3148 uint8_t event[13]; 3149 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3150 event[1] = sizeof(event) - 2; 3151 event[2] = status; 3152 little_endian_store_16(event, 3, con_handle); 3153 reverse_bd_addr(address, &event[5]); 3154 event[11] = 1; // ACL connection 3155 event[12] = 0; // encryption disabled 3156 hci_emit_event(event, sizeof(event), 1); 3157 } 3158 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3159 if (disable_l2cap_timeouts) return; 3160 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3161 uint8_t event[4]; 3162 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3163 event[1] = sizeof(event) - 2; 3164 little_endian_store_16(event, 2, conn->con_handle); 3165 hci_emit_event(event, sizeof(event), 1); 3166 } 3167 #endif 3168 3169 #ifdef ENABLE_BLE 3170 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3171 uint8_t event[21]; 3172 event[0] = HCI_EVENT_LE_META; 3173 event[1] = sizeof(event) - 2; 3174 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3175 event[3] = status; 3176 little_endian_store_16(event, 4, con_handle); 3177 event[6] = 0; // TODO: role 3178 event[7] = address_type; 3179 reverse_bd_addr(address, &event[8]); 3180 little_endian_store_16(event, 14, 0); // interval 3181 little_endian_store_16(event, 16, 0); // latency 3182 little_endian_store_16(event, 18, 0); // supervision timeout 3183 event[20] = 0; // master clock accuracy 3184 hci_emit_event(event, sizeof(event), 1); 3185 } 3186 #endif 3187 3188 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3189 uint8_t event[6]; 3190 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3191 event[1] = sizeof(event) - 2; 3192 event[2] = 0; // status = OK 3193 little_endian_store_16(event, 3, con_handle); 3194 event[5] = reason; 3195 hci_emit_event(event, sizeof(event), 1); 3196 } 3197 3198 static void hci_emit_nr_connections_changed(void){ 3199 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3200 uint8_t event[3]; 3201 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3202 event[1] = sizeof(event) - 2; 3203 event[2] = nr_hci_connections(); 3204 hci_emit_event(event, sizeof(event), 1); 3205 } 3206 3207 static void hci_emit_hci_open_failed(void){ 3208 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3209 uint8_t event[2]; 3210 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3211 event[1] = sizeof(event) - 2; 3212 hci_emit_event(event, sizeof(event), 1); 3213 } 3214 3215 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3216 log_info("hci_emit_dedicated_bonding_result %u ", status); 3217 uint8_t event[9]; 3218 int pos = 0; 3219 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3220 event[pos++] = sizeof(event) - 2; 3221 event[pos++] = status; 3222 reverse_bd_addr(address, &event[pos]); 3223 hci_emit_event(event, sizeof(event), 1); 3224 } 3225 3226 3227 #ifdef ENABLE_CLASSIC 3228 3229 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3230 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3231 uint8_t event[5]; 3232 int pos = 0; 3233 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3234 event[pos++] = sizeof(event) - 2; 3235 little_endian_store_16(event, 2, con_handle); 3236 pos += 2; 3237 event[pos++] = level; 3238 hci_emit_event(event, sizeof(event), 1); 3239 } 3240 3241 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3242 if (!connection) return LEVEL_0; 3243 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3244 return gap_security_level_for_link_key_type(connection->link_key_type); 3245 } 3246 3247 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3248 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3249 uint8_t event[3]; 3250 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3251 event[1] = sizeof(event) - 2; 3252 event[2] = enabled; 3253 hci_emit_event(event, sizeof(event), 1); 3254 } 3255 3256 // query if remote side supports eSCO 3257 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3258 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3259 if (!connection) return 0; 3260 return connection->remote_supported_feature_eSCO; 3261 } 3262 3263 // query if remote side supports SSP 3264 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3265 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3266 if (!connection) return 0; 3267 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3268 } 3269 3270 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3271 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3272 } 3273 3274 // GAP API 3275 /** 3276 * @bbrief enable/disable bonding. default is enabled 3277 * @praram enabled 3278 */ 3279 void gap_set_bondable_mode(int enable){ 3280 hci_stack->bondable = enable ? 1 : 0; 3281 } 3282 /** 3283 * @brief Get bondable mode. 3284 * @return 1 if bondable 3285 */ 3286 int gap_get_bondable_mode(void){ 3287 return hci_stack->bondable; 3288 } 3289 3290 /** 3291 * @brief map link keys to security levels 3292 */ 3293 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3294 switch (link_key_type){ 3295 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3296 return LEVEL_4; 3297 case COMBINATION_KEY: 3298 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3299 return LEVEL_3; 3300 default: 3301 return LEVEL_2; 3302 } 3303 } 3304 3305 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3306 log_info("gap_mitm_protection_required_for_security_level %u", level); 3307 return level > LEVEL_2; 3308 } 3309 3310 /** 3311 * @brief get current security level 3312 */ 3313 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3314 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3315 if (!connection) return LEVEL_0; 3316 return gap_security_level_for_connection(connection); 3317 } 3318 3319 /** 3320 * @brief request connection to device to 3321 * @result GAP_AUTHENTICATION_RESULT 3322 */ 3323 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3324 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3325 if (!connection){ 3326 hci_emit_security_level(con_handle, LEVEL_0); 3327 return; 3328 } 3329 gap_security_level_t current_level = gap_security_level(con_handle); 3330 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3331 if (current_level >= requested_level){ 3332 hci_emit_security_level(con_handle, current_level); 3333 return; 3334 } 3335 3336 connection->requested_security_level = requested_level; 3337 3338 #if 0 3339 // sending encryption request without a link key results in an error. 3340 // TODO: figure out how to use it properly 3341 3342 // would enabling ecnryption suffice (>= LEVEL_2)? 3343 if (hci_stack->link_key_db){ 3344 link_key_type_t link_key_type; 3345 link_key_t link_key; 3346 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3347 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3348 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3349 return; 3350 } 3351 } 3352 } 3353 #endif 3354 3355 // try to authenticate connection 3356 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3357 hci_run(); 3358 } 3359 3360 /** 3361 * @brief start dedicated bonding with device. disconnect after bonding 3362 * @param device 3363 * @param request MITM protection 3364 * @result GAP_DEDICATED_BONDING_COMPLETE 3365 */ 3366 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3367 3368 // create connection state machine 3369 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3370 3371 if (!connection){ 3372 return BTSTACK_MEMORY_ALLOC_FAILED; 3373 } 3374 3375 // delete linkn key 3376 gap_drop_link_key_for_bd_addr(device); 3377 3378 // configure LEVEL_2/3, dedicated bonding 3379 connection->state = SEND_CREATE_CONNECTION; 3380 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3381 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3382 connection->bonding_flags = BONDING_DEDICATED; 3383 3384 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3385 3386 // handle: connnection failure (connection complete != ok) 3387 // handle: authentication failure 3388 // handle: disconnect on done 3389 3390 hci_run(); 3391 3392 return 0; 3393 } 3394 #endif 3395 3396 void gap_set_local_name(const char * local_name){ 3397 hci_stack->local_name = local_name; 3398 } 3399 3400 3401 #ifdef ENABLE_BLE 3402 3403 void gap_start_scan(void){ 3404 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3405 hci_stack->le_scanning_state = LE_START_SCAN; 3406 hci_run(); 3407 } 3408 3409 void gap_stop_scan(void){ 3410 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3411 hci_stack->le_scanning_state = LE_STOP_SCAN; 3412 hci_run(); 3413 } 3414 3415 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3416 hci_stack->le_scan_type = scan_type; 3417 hci_stack->le_scan_interval = scan_interval; 3418 hci_stack->le_scan_window = scan_window; 3419 hci_run(); 3420 } 3421 3422 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3423 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3424 if (!conn){ 3425 log_info("gap_connect: no connection exists yet, creating context"); 3426 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3427 if (!conn){ 3428 // notify client that alloc failed 3429 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3430 log_info("gap_connect: failed to alloc hci_connection_t"); 3431 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3432 } 3433 conn->state = SEND_CREATE_CONNECTION; 3434 log_info("gap_connect: send create connection next"); 3435 hci_run(); 3436 return 0; 3437 } 3438 3439 if (!hci_is_le_connection(conn) || 3440 conn->state == SEND_CREATE_CONNECTION || 3441 conn->state == SENT_CREATE_CONNECTION) { 3442 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3443 log_error("gap_connect: classic connection or connect is already being created"); 3444 return GATT_CLIENT_IN_WRONG_STATE; 3445 } 3446 3447 log_info("gap_connect: context exists with state %u", conn->state); 3448 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3449 hci_run(); 3450 return 0; 3451 } 3452 3453 // @assumption: only a single outgoing LE Connection exists 3454 static hci_connection_t * gap_get_outgoing_connection(void){ 3455 btstack_linked_item_t *it; 3456 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3457 hci_connection_t * conn = (hci_connection_t *) it; 3458 if (!hci_is_le_connection(conn)) continue; 3459 switch (conn->state){ 3460 case SEND_CREATE_CONNECTION: 3461 case SENT_CREATE_CONNECTION: 3462 return conn; 3463 default: 3464 break; 3465 }; 3466 } 3467 return NULL; 3468 } 3469 3470 uint8_t gap_connect_cancel(void){ 3471 hci_connection_t * conn = gap_get_outgoing_connection(); 3472 if (!conn) return 0; 3473 switch (conn->state){ 3474 case SEND_CREATE_CONNECTION: 3475 // skip sending create connection and emit event instead 3476 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3477 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3478 btstack_memory_hci_connection_free( conn ); 3479 break; 3480 case SENT_CREATE_CONNECTION: 3481 // request to send cancel connection 3482 conn->state = SEND_CANCEL_CONNECTION; 3483 hci_run(); 3484 break; 3485 default: 3486 break; 3487 } 3488 return 0; 3489 } 3490 3491 /** 3492 * @brief Updates the connection parameters for a given LE connection 3493 * @param handle 3494 * @param conn_interval_min (unit: 1.25ms) 3495 * @param conn_interval_max (unit: 1.25ms) 3496 * @param conn_latency 3497 * @param supervision_timeout (unit: 10ms) 3498 * @returns 0 if ok 3499 */ 3500 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3501 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3502 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3503 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3504 connection->le_conn_interval_min = conn_interval_min; 3505 connection->le_conn_interval_max = conn_interval_max; 3506 connection->le_conn_latency = conn_latency; 3507 connection->le_supervision_timeout = supervision_timeout; 3508 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3509 hci_run(); 3510 return 0; 3511 } 3512 3513 /** 3514 * @brief Request an update of the connection parameter for a given LE connection 3515 * @param handle 3516 * @param conn_interval_min (unit: 1.25ms) 3517 * @param conn_interval_max (unit: 1.25ms) 3518 * @param conn_latency 3519 * @param supervision_timeout (unit: 10ms) 3520 * @returns 0 if ok 3521 */ 3522 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3523 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3524 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3525 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3526 connection->le_conn_interval_min = conn_interval_min; 3527 connection->le_conn_interval_max = conn_interval_max; 3528 connection->le_conn_latency = conn_latency; 3529 connection->le_supervision_timeout = supervision_timeout; 3530 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3531 hci_run(); 3532 return 0; 3533 } 3534 3535 static void gap_advertisments_changed(void){ 3536 // disable advertisements before updating adv, scan data, or adv params 3537 if (hci_stack->le_advertisements_active){ 3538 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3539 } 3540 hci_run(); 3541 } 3542 3543 /** 3544 * @brief Set Advertisement Data 3545 * @param advertising_data_length 3546 * @param advertising_data (max 31 octets) 3547 * @note data is not copied, pointer has to stay valid 3548 */ 3549 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3550 hci_stack->le_advertisements_data_len = advertising_data_length; 3551 hci_stack->le_advertisements_data = advertising_data; 3552 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3553 gap_advertisments_changed(); 3554 } 3555 3556 /** 3557 * @brief Set Scan Response Data 3558 * @param advertising_data_length 3559 * @param advertising_data (max 31 octets) 3560 * @note data is not copied, pointer has to stay valid 3561 */ 3562 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3563 hci_stack->le_scan_response_data_len = scan_response_data_length; 3564 hci_stack->le_scan_response_data = scan_response_data; 3565 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3566 gap_advertisments_changed(); 3567 } 3568 3569 /** 3570 * @brief Set Advertisement Parameters 3571 * @param adv_int_min 3572 * @param adv_int_max 3573 * @param adv_type 3574 * @param own_address_type 3575 * @param direct_address_type 3576 * @param direct_address 3577 * @param channel_map 3578 * @param filter_policy 3579 * 3580 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3581 */ 3582 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3583 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3584 uint8_t channel_map, uint8_t filter_policy) { 3585 3586 hci_stack->le_advertisements_interval_min = adv_int_min; 3587 hci_stack->le_advertisements_interval_max = adv_int_max; 3588 hci_stack->le_advertisements_type = adv_type; 3589 hci_stack->le_advertisements_own_address_type = own_address_type; 3590 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3591 hci_stack->le_advertisements_channel_map = channel_map; 3592 hci_stack->le_advertisements_filter_policy = filter_policy; 3593 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3594 3595 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3596 gap_advertisments_changed(); 3597 } 3598 3599 void hci_le_advertisements_set_own_address_type(uint8_t own_address_type){ 3600 hci_stack->le_advertisements_own_address_type = own_address_type; 3601 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3602 gap_advertisments_changed(); 3603 } 3604 3605 /** 3606 * @brief Enable/Disable Advertisements 3607 * @param enabled 3608 */ 3609 void gap_advertisements_enable(int enabled){ 3610 hci_stack->le_advertisements_enabled = enabled; 3611 if (enabled && !hci_stack->le_advertisements_active){ 3612 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3613 } 3614 if (!enabled && hci_stack->le_advertisements_active){ 3615 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3616 } 3617 hci_run(); 3618 } 3619 3620 #endif 3621 3622 uint8_t gap_disconnect(hci_con_handle_t handle){ 3623 hci_connection_t * conn = hci_connection_for_handle(handle); 3624 if (!conn){ 3625 hci_emit_disconnection_complete(handle, 0); 3626 return 0; 3627 } 3628 conn->state = SEND_DISCONNECT; 3629 hci_run(); 3630 return 0; 3631 } 3632 3633 /** 3634 * @brief Get connection type 3635 * @param con_handle 3636 * @result connection_type 3637 */ 3638 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3639 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3640 if (!conn) return GAP_CONNECTION_INVALID; 3641 switch (conn->address_type){ 3642 case BD_ADDR_TYPE_LE_PUBLIC: 3643 case BD_ADDR_TYPE_LE_RANDOM: 3644 return GAP_CONNECTION_LE; 3645 case BD_ADDR_TYPE_SCO: 3646 return GAP_CONNECTION_SCO; 3647 case BD_ADDR_TYPE_CLASSIC: 3648 return GAP_CONNECTION_ACL; 3649 default: 3650 return GAP_CONNECTION_INVALID; 3651 } 3652 } 3653 3654 #ifdef ENABLE_BLE 3655 3656 /** 3657 * @brief Auto Connection Establishment - Start Connecting to device 3658 * @param address_typ 3659 * @param address 3660 * @returns 0 if ok 3661 */ 3662 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3663 // check capacity 3664 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3665 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3666 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3667 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3668 entry->address_type = address_type; 3669 memcpy(entry->address, address, 6); 3670 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3671 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3672 hci_run(); 3673 return 0; 3674 } 3675 3676 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3677 btstack_linked_list_iterator_t it; 3678 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3679 while (btstack_linked_list_iterator_has_next(&it)){ 3680 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3681 if (entry->address_type != address_type) continue; 3682 if (memcmp(entry->address, address, 6) != 0) continue; 3683 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3684 // remove from controller if already present 3685 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3686 continue; 3687 } 3688 // direclty remove entry from whitelist 3689 btstack_linked_list_iterator_remove(&it); 3690 btstack_memory_whitelist_entry_free(entry); 3691 } 3692 } 3693 3694 /** 3695 * @brief Auto Connection Establishment - Stop Connecting to device 3696 * @param address_typ 3697 * @param address 3698 * @returns 0 if ok 3699 */ 3700 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3701 hci_remove_from_whitelist(address_type, address); 3702 hci_run(); 3703 return 0; 3704 } 3705 3706 /** 3707 * @brief Auto Connection Establishment - Stop everything 3708 * @note Convenience function to stop all active auto connection attempts 3709 */ 3710 void gap_auto_connection_stop_all(void){ 3711 btstack_linked_list_iterator_t it; 3712 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3713 while (btstack_linked_list_iterator_has_next(&it)){ 3714 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3715 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3716 // remove from controller if already present 3717 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3718 continue; 3719 } 3720 // directly remove entry from whitelist 3721 btstack_linked_list_iterator_remove(&it); 3722 btstack_memory_whitelist_entry_free(entry); 3723 } 3724 hci_run(); 3725 } 3726 3727 #endif 3728 3729 #ifdef ENABLE_CLASSIC 3730 /** 3731 * @brief Set Extended Inquiry Response data 3732 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3733 * @note has to be done before stack starts up 3734 */ 3735 void gap_set_extended_inquiry_response(const uint8_t * data){ 3736 hci_stack->eir_data = data; 3737 } 3738 3739 /** 3740 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3741 * @param inquriy_mode see bluetooth_defines.h 3742 */ 3743 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3744 hci_stack->inquiry_mode = mode; 3745 } 3746 3747 /** 3748 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3749 */ 3750 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3751 hci_stack->sco_voice_setting = voice_setting; 3752 } 3753 3754 /** 3755 * @brief Get SCO Voice Setting 3756 * @return current voice setting 3757 */ 3758 uint16_t hci_get_sco_voice_setting(void){ 3759 return hci_stack->sco_voice_setting; 3760 } 3761 3762 /** @brief Get SCO packet length for current SCO Voice setting 3763 * @note Using SCO packets of the exact length is required for USB transfer 3764 * @return Length of SCO packets in bytes (not audio frames) 3765 */ 3766 int hci_get_sco_packet_length(void){ 3767 // see Core Spec for H2 USB Transfer. 3768 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3769 return 27; 3770 } 3771 #endif 3772 3773 /** 3774 * @brief Set callback for Bluetooth Hardware Error 3775 */ 3776 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3777 hci_stack->hardware_error_callback = fn; 3778 } 3779 3780 void hci_disconnect_all(void){ 3781 btstack_linked_list_iterator_t it; 3782 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3783 while (btstack_linked_list_iterator_has_next(&it)){ 3784 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3785 if (con->state == SENT_DISCONNECT) continue; 3786 con->state = SEND_DISCONNECT; 3787 } 3788 hci_run(); 3789 } 3790 3791 uint16_t hci_get_manufacturer(void){ 3792 return hci_stack->manufacturer; 3793 } 3794