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 int offset = 3; 863 int num_reports = packet[offset]; 864 offset += 1; 865 866 int i; 867 // log_info("HCI: handle adv report with num reports: %d", num_reports); 868 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 869 for (i=0; i<num_reports;i++){ 870 uint8_t data_length = packet[offset + 8]; 871 uint8_t event_size = 10 + data_length; 872 int pos = 0; 873 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 874 event[pos++] = event_size; 875 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 876 offset += 8; 877 pos += 8; 878 event[pos++] = packet[offset + 1 + data_length]; // rssi 879 event[pos++] = packet[offset++]; //data_length; 880 memcpy(&event[pos], &packet[offset], data_length); 881 pos += data_length; 882 offset += data_length + 1; // rssi 883 hci_emit_event(event, pos, 1); 884 } 885 } 886 #endif 887 888 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 889 if (!hci_stack->config) return 0; 890 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 891 // Limit baud rate for Broadcom chipsets to 3 mbps 892 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 893 baud_rate = 3000000; 894 } 895 return baud_rate; 896 } 897 898 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 899 switch (hci_stack->substate){ 900 case HCI_INIT_W4_SEND_RESET: 901 log_info("Resend HCI Reset"); 902 hci_stack->substate = HCI_INIT_SEND_RESET; 903 hci_stack->num_cmd_packets = 1; 904 hci_run(); 905 break; 906 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 907 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 908 if (hci_stack->hci_transport->reset_link){ 909 hci_stack->hci_transport->reset_link(); 910 } 911 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 912 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 913 log_info("Resend HCI Reset - CSR Warm Boot"); 914 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 915 hci_stack->num_cmd_packets = 1; 916 hci_run(); 917 break; 918 case HCI_INIT_W4_SEND_BAUD_CHANGE: 919 if (hci_stack->hci_transport->set_baudrate){ 920 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 921 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 922 hci_stack->hci_transport->set_baudrate(baud_rate); 923 } 924 // For CSR, HCI Reset is sent on new baud rate 925 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 926 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 927 hci_run(); 928 } 929 break; 930 default: 931 break; 932 } 933 } 934 935 static void hci_initializing_next_state(void){ 936 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 937 } 938 939 // assumption: hci_can_send_command_packet_now() == true 940 static void hci_initializing_run(void){ 941 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 942 switch (hci_stack->substate){ 943 case HCI_INIT_SEND_RESET: 944 hci_state_reset(); 945 946 #ifndef HAVE_PLATFORM_IPHONE_OS 947 // prepare reset if command complete not received in 100ms 948 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 949 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 950 btstack_run_loop_add_timer(&hci_stack->timeout); 951 #endif 952 // send command 953 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 954 hci_send_cmd(&hci_reset); 955 break; 956 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 957 hci_send_cmd(&hci_read_local_version_information); 958 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 959 break; 960 case HCI_INIT_SEND_READ_LOCAL_NAME: 961 hci_send_cmd(&hci_read_local_name); 962 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 963 break; 964 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 965 hci_state_reset(); 966 // prepare reset if command complete not received in 100ms 967 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 968 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 969 btstack_run_loop_add_timer(&hci_stack->timeout); 970 // send command 971 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 972 hci_send_cmd(&hci_reset); 973 break; 974 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 975 hci_state_reset(); 976 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 977 hci_send_cmd(&hci_reset); 978 break; 979 case HCI_INIT_SEND_BAUD_CHANGE: { 980 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 981 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 982 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 983 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 984 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 985 // STLC25000D: baudrate change happens within 0.5 s after command was send, 986 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 987 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 988 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 989 btstack_run_loop_add_timer(&hci_stack->timeout); 990 } 991 break; 992 } 993 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 994 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 995 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 996 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 997 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 998 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 999 break; 1000 } 1001 case HCI_INIT_CUSTOM_INIT: 1002 // Custom initialization 1003 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1004 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1005 if (valid_cmd){ 1006 int size = 3 + hci_stack->hci_packet_buffer[2]; 1007 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1008 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1009 switch (valid_cmd) { 1010 case 1: 1011 default: 1012 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1013 break; 1014 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1015 log_info("CSR Warm Boot"); 1016 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1017 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1018 btstack_run_loop_add_timer(&hci_stack->timeout); 1019 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1020 && hci_stack->config 1021 && hci_stack->chipset 1022 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1023 && hci_stack->hci_transport->set_baudrate 1024 && hci_transport_uart_get_main_baud_rate()){ 1025 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1026 } else { 1027 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1028 } 1029 break; 1030 } 1031 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1032 break; 1033 } 1034 log_info("Init script done"); 1035 1036 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1037 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1038 int need_baud_change = hci_stack->config 1039 && hci_stack->chipset 1040 && hci_stack->chipset->set_baudrate_command 1041 && hci_stack->hci_transport->set_baudrate 1042 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1043 if (need_baud_change) { 1044 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1045 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1046 hci_stack->hci_transport->set_baudrate(baud_rate); 1047 } 1048 } 1049 } 1050 // otherwise continue 1051 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1052 hci_send_cmd(&hci_read_local_supported_commands); 1053 break; 1054 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1055 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 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_SET_BD_ADDR: 1060 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1061 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1062 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1063 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1064 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1065 break; 1066 case HCI_INIT_READ_BD_ADDR: 1067 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1068 hci_send_cmd(&hci_read_bd_addr); 1069 break; 1070 case HCI_INIT_READ_BUFFER_SIZE: 1071 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1072 hci_send_cmd(&hci_read_buffer_size); 1073 break; 1074 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1075 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1076 hci_send_cmd(&hci_read_local_supported_features); 1077 break; 1078 case HCI_INIT_SET_EVENT_MASK: 1079 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1080 if (hci_le_supported()){ 1081 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1082 } else { 1083 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1084 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1085 } 1086 break; 1087 #ifdef ENABLE_CLASSIC 1088 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1089 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1090 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1091 break; 1092 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1093 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1094 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1095 break; 1096 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1097 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1098 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1099 break; 1100 case HCI_INIT_WRITE_LOCAL_NAME: 1101 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1102 if (hci_stack->local_name){ 1103 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1104 } else { 1105 char local_name[8+17+1]; 1106 // BTstack 11:22:33:44:55:66 1107 memcpy(local_name, "BTstack ", 8); 1108 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1109 local_name[8+17] = '\0'; 1110 log_info("---> Name %s", local_name); 1111 hci_send_cmd(&hci_write_local_name, local_name); 1112 } 1113 break; 1114 case HCI_INIT_WRITE_EIR_DATA: 1115 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1116 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1117 break; 1118 case HCI_INIT_WRITE_INQUIRY_MODE: 1119 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1120 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1121 break; 1122 case HCI_INIT_WRITE_SCAN_ENABLE: 1123 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1124 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1125 break; 1126 // only sent if ENABLE_SCO_OVER_HCI is defined 1127 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1128 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1129 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1130 break; 1131 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1132 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1133 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1134 break; 1135 #endif 1136 #ifdef ENABLE_BLE 1137 // LE INIT 1138 case HCI_INIT_LE_READ_BUFFER_SIZE: 1139 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1140 hci_send_cmd(&hci_le_read_buffer_size); 1141 break; 1142 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1143 // LE Supported Host = 1, Simultaneous Host = 0 1144 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1145 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1146 break; 1147 case HCI_INIT_READ_WHITE_LIST_SIZE: 1148 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1149 hci_send_cmd(&hci_le_read_white_list_size); 1150 break; 1151 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1152 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1153 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1154 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1155 break; 1156 #endif 1157 default: 1158 return; 1159 } 1160 } 1161 1162 static void hci_init_done(void){ 1163 // done. tell the app 1164 log_info("hci_init_done -> HCI_STATE_WORKING"); 1165 hci_stack->state = HCI_STATE_WORKING; 1166 hci_emit_state(); 1167 hci_run(); 1168 } 1169 1170 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1171 uint8_t command_completed = 0; 1172 1173 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1174 uint16_t opcode = little_endian_read_16(packet,3); 1175 if (opcode == hci_stack->last_cmd_opcode){ 1176 command_completed = 1; 1177 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1178 } else { 1179 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1180 } 1181 } 1182 1183 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1184 uint8_t status = packet[2]; 1185 uint16_t opcode = little_endian_read_16(packet,4); 1186 if (opcode == hci_stack->last_cmd_opcode){ 1187 if (status){ 1188 command_completed = 1; 1189 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1190 } else { 1191 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1192 } 1193 } else { 1194 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1195 } 1196 } 1197 1198 // Vendor == CSR 1199 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1200 // TODO: track actual command 1201 command_completed = 1; 1202 } 1203 1204 // Vendor == Toshiba 1205 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1206 // TODO: track actual command 1207 command_completed = 1; 1208 } 1209 1210 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1211 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1212 // 1213 // HCI Reset 1214 // Timeout 100 ms 1215 // HCI Reset 1216 // Command Complete Reset 1217 // HCI Read Local Version Information 1218 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1219 // hang... 1220 // 1221 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1222 if (!command_completed 1223 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1224 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1225 1226 uint16_t opcode = little_endian_read_16(packet,3); 1227 if (opcode == hci_reset.opcode){ 1228 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1229 return; 1230 } 1231 } 1232 1233 // CSR & H5 1234 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1235 if (!command_completed 1236 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1237 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1238 1239 uint16_t opcode = little_endian_read_16(packet,3); 1240 if (opcode == hci_reset.opcode){ 1241 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1242 return; 1243 } 1244 } 1245 1246 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1247 // fix: Correct substate and behave as command below 1248 if (command_completed){ 1249 switch (hci_stack->substate){ 1250 case HCI_INIT_SEND_RESET: 1251 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1252 break; 1253 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1254 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1255 break; 1256 default: 1257 break; 1258 } 1259 } 1260 1261 1262 if (!command_completed) return; 1263 1264 int need_baud_change = hci_stack->config 1265 && hci_stack->chipset 1266 && hci_stack->chipset->set_baudrate_command 1267 && hci_stack->hci_transport->set_baudrate 1268 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1269 1270 int need_addr_change = hci_stack->custom_bd_addr_set 1271 && hci_stack->chipset 1272 && hci_stack->chipset->set_bd_addr_command; 1273 1274 switch(hci_stack->substate){ 1275 case HCI_INIT_SEND_RESET: 1276 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1277 // fix: just correct substate and behave as command below 1278 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1279 btstack_run_loop_remove_timer(&hci_stack->timeout); 1280 break; 1281 case HCI_INIT_W4_SEND_RESET: 1282 btstack_run_loop_remove_timer(&hci_stack->timeout); 1283 break; 1284 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1285 log_info("Received local name, need baud change %d", need_baud_change); 1286 if (need_baud_change){ 1287 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1288 return; 1289 } 1290 // skip baud change 1291 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1292 return; 1293 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1294 // for STLC2500D, baud rate change already happened. 1295 // for others, baud rate gets changed now 1296 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1297 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1298 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1299 hci_stack->hci_transport->set_baudrate(baud_rate); 1300 } 1301 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1302 return; 1303 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1304 btstack_run_loop_remove_timer(&hci_stack->timeout); 1305 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1306 return; 1307 case HCI_INIT_W4_CUSTOM_INIT: 1308 // repeat custom init 1309 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1310 return; 1311 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1312 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1313 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1314 return; 1315 } 1316 if (need_addr_change){ 1317 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1318 return; 1319 } 1320 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1321 return; 1322 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1323 if (need_baud_change){ 1324 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1325 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 if (need_addr_change){ 1329 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1330 return; 1331 } 1332 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1333 return; 1334 case HCI_INIT_W4_SET_BD_ADDR: 1335 // for STLC2500D, bd addr change only gets active after sending reset command 1336 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1337 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1338 return; 1339 } 1340 // skipping st warm boot 1341 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1342 return; 1343 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1344 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1345 return; 1346 case HCI_INIT_W4_READ_BD_ADDR: 1347 // only read buffer size if supported 1348 if (hci_stack->local_supported_commands[0] & 0x01) { 1349 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1350 return; 1351 } 1352 // skipping read buffer size 1353 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1354 return; 1355 case HCI_INIT_W4_SET_EVENT_MASK: 1356 // skip Classic init commands for LE only chipsets 1357 if (!hci_classic_supported()){ 1358 if (hci_le_supported()){ 1359 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1360 return; 1361 } else { 1362 log_error("Neither BR/EDR nor LE supported"); 1363 hci_init_done(); 1364 return; 1365 } 1366 } 1367 if (!gap_ssp_supported()){ 1368 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1369 return; 1370 } 1371 break; 1372 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1373 // skip write le host if not supported (e.g. on LE only EM9301) 1374 if (hci_stack->local_supported_commands[0] & 0x02) break; 1375 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1376 return; 1377 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1378 // skip write eir data if no eir data set 1379 if (hci_stack->eir_data) break; 1380 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1381 return; 1382 1383 #ifdef ENABLE_SCO_OVER_HCI 1384 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1385 // skip write synchronous flow control if not supported 1386 if (hci_stack->local_supported_commands[0] & 0x04) break; 1387 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1388 // explicit fall through to reduce repetitions 1389 1390 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1391 // skip write default erroneous data reporting if not supported 1392 if (hci_stack->local_supported_commands[0] & 0x08) break; 1393 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1394 // explicit fall through to reduce repetitions 1395 1396 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1397 if (!hci_le_supported()){ 1398 // SKIP LE init for Classic only configuration 1399 hci_init_done(); 1400 return; 1401 } 1402 break; 1403 #else 1404 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1405 if (!hci_le_supported()){ 1406 // SKIP LE init for Classic only configuration 1407 hci_init_done(); 1408 return; 1409 } 1410 #endif 1411 break; 1412 // Response to command before init done state -> init done 1413 case (HCI_INIT_DONE-1): 1414 hci_init_done(); 1415 return; 1416 1417 default: 1418 break; 1419 } 1420 hci_initializing_next_state(); 1421 } 1422 1423 static void event_handler(uint8_t *packet, int size){ 1424 1425 uint16_t event_length = packet[1]; 1426 1427 // assert packet is complete 1428 if (size != event_length + 2){ 1429 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1430 return; 1431 } 1432 1433 bd_addr_t addr; 1434 bd_addr_type_t addr_type; 1435 uint8_t link_type; 1436 hci_con_handle_t handle; 1437 hci_connection_t * conn; 1438 int i; 1439 1440 // warnings 1441 (void) link_type; 1442 1443 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1444 1445 switch (hci_event_packet_get_type(packet)) { 1446 1447 case HCI_EVENT_COMMAND_COMPLETE: 1448 // get num cmd packets 1449 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1450 hci_stack->num_cmd_packets = packet[2]; 1451 1452 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1453 // terminate, name 248 chars 1454 packet[6+248] = 0; 1455 log_info("local name: %s", &packet[6]); 1456 } 1457 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1458 // from offset 5 1459 // status 1460 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1461 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1462 hci_stack->sco_data_packet_length = packet[8]; 1463 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1464 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1465 1466 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1467 // determine usable ACL payload size 1468 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1469 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1470 } 1471 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1472 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1473 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1474 } 1475 } 1476 #ifdef ENABLE_BLE 1477 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1478 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1479 hci_stack->le_acl_packets_total_num = packet[8]; 1480 // determine usable ACL payload size 1481 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1482 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1483 } 1484 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1485 } 1486 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1487 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1488 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1489 } 1490 #endif 1491 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1492 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1493 hci_stack->local_bd_addr); 1494 log_info("Local Address, Status: 0x%02x: Addr: %s", 1495 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1496 #ifdef ENABLE_CLASSIC 1497 if (hci_stack->link_key_db){ 1498 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1499 } 1500 #endif 1501 } 1502 #ifdef ENABLE_CLASSIC 1503 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1504 hci_emit_discoverable_enabled(hci_stack->discoverable); 1505 } 1506 #endif 1507 1508 // Note: HCI init checks 1509 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1510 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1511 1512 #ifdef ENABLE_CLASSIC 1513 // determine usable ACL packet types based on host buffer size and supported features 1514 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1515 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1516 #endif 1517 // Classic/LE 1518 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1519 } 1520 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1521 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1522 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1523 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1524 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1525 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1526 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1527 // notify app 1528 if (hci_stack->local_version_information_callback){ 1529 hci_stack->local_version_information_callback(packet); 1530 } 1531 } 1532 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1533 hci_stack->local_supported_commands[0] = 1534 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1535 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1536 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1537 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1538 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1539 } 1540 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1541 if (packet[5] == 0){ 1542 hci_stack->synchronous_flow_control_enabled = 1; 1543 } 1544 } 1545 break; 1546 1547 case HCI_EVENT_COMMAND_STATUS: 1548 // get num cmd packets 1549 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1550 hci_stack->num_cmd_packets = packet[3]; 1551 break; 1552 1553 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1554 int offset = 3; 1555 for (i=0; i<packet[2];i++){ 1556 handle = little_endian_read_16(packet, offset); 1557 offset += 2; 1558 uint16_t num_packets = little_endian_read_16(packet, offset); 1559 offset += 2; 1560 1561 conn = hci_connection_for_handle(handle); 1562 if (!conn){ 1563 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1564 continue; 1565 } 1566 1567 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1568 #ifdef ENABLE_CLASSIC 1569 if (conn->num_sco_packets_sent >= num_packets){ 1570 conn->num_sco_packets_sent -= num_packets; 1571 } else { 1572 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1573 conn->num_sco_packets_sent = 0; 1574 } 1575 hci_notify_if_sco_can_send_now(); 1576 #endif 1577 } else { 1578 if (conn->num_acl_packets_sent >= num_packets){ 1579 conn->num_acl_packets_sent -= num_packets; 1580 } else { 1581 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1582 conn->num_acl_packets_sent = 0; 1583 } 1584 } 1585 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1586 } 1587 break; 1588 } 1589 1590 #ifdef ENABLE_CLASSIC 1591 case HCI_EVENT_CONNECTION_REQUEST: 1592 reverse_bd_addr(&packet[2], addr); 1593 // TODO: eval COD 8-10 1594 link_type = packet[11]; 1595 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1596 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1597 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1598 if (!conn) { 1599 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1600 } 1601 if (!conn) { 1602 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1603 hci_stack->decline_reason = 0x0d; 1604 bd_addr_copy(hci_stack->decline_addr, addr); 1605 break; 1606 } 1607 conn->role = HCI_ROLE_SLAVE; 1608 conn->state = RECEIVED_CONNECTION_REQUEST; 1609 // store info about eSCO 1610 if (link_type == 0x02){ 1611 conn->remote_supported_feature_eSCO = 1; 1612 } 1613 hci_run(); 1614 break; 1615 1616 case HCI_EVENT_CONNECTION_COMPLETE: 1617 // Connection management 1618 reverse_bd_addr(&packet[5], addr); 1619 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1620 addr_type = BD_ADDR_TYPE_CLASSIC; 1621 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1622 if (conn) { 1623 if (!packet[2]){ 1624 conn->state = OPEN; 1625 conn->con_handle = little_endian_read_16(packet, 3); 1626 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1627 1628 // restart timer 1629 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1630 btstack_run_loop_add_timer(&conn->timeout); 1631 1632 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1633 1634 hci_emit_nr_connections_changed(); 1635 } else { 1636 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1637 uint8_t status = packet[2]; 1638 bd_addr_t bd_address; 1639 memcpy(&bd_address, conn->address, 6); 1640 1641 // connection failed, remove entry 1642 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1643 btstack_memory_hci_connection_free( conn ); 1644 1645 // notify client if dedicated bonding 1646 if (notify_dedicated_bonding_failed){ 1647 log_info("hci notify_dedicated_bonding_failed"); 1648 hci_emit_dedicated_bonding_result(bd_address, status); 1649 } 1650 1651 // if authentication error, also delete link key 1652 if (packet[2] == 0x05) { 1653 gap_drop_link_key_for_bd_addr(addr); 1654 } 1655 } 1656 } 1657 break; 1658 1659 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1660 reverse_bd_addr(&packet[5], addr); 1661 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1662 if (packet[2]){ 1663 // connection failed 1664 break; 1665 } 1666 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1667 if (!conn) { 1668 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1669 } 1670 if (!conn) { 1671 break; 1672 } 1673 conn->state = OPEN; 1674 conn->con_handle = little_endian_read_16(packet, 3); 1675 break; 1676 1677 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1678 handle = little_endian_read_16(packet, 3); 1679 conn = hci_connection_for_handle(handle); 1680 if (!conn) break; 1681 if (!packet[2]){ 1682 uint8_t * features = &packet[5]; 1683 if (features[6] & (1 << 3)){ 1684 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1685 } 1686 if (features[3] & (1<<7)){ 1687 conn->remote_supported_feature_eSCO = 1; 1688 } 1689 } 1690 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1691 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1692 if (conn->bonding_flags & BONDING_DEDICATED){ 1693 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1694 } 1695 break; 1696 1697 case HCI_EVENT_LINK_KEY_REQUEST: 1698 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1699 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1700 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1701 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1702 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1703 hci_run(); 1704 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1705 return; 1706 1707 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1708 reverse_bd_addr(&packet[2], addr); 1709 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1710 if (!conn) break; 1711 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1712 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1713 // Change Connection Encryption keeps link key type 1714 if (link_key_type != CHANGED_COMBINATION_KEY){ 1715 conn->link_key_type = link_key_type; 1716 } 1717 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1718 // still forward event to allow dismiss of pairing dialog 1719 break; 1720 } 1721 1722 case HCI_EVENT_PIN_CODE_REQUEST: 1723 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1724 // non-bondable mode: pin code negative reply will be sent 1725 if (!hci_stack->bondable){ 1726 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1727 hci_run(); 1728 return; 1729 } 1730 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1731 if (!hci_stack->link_key_db) break; 1732 hci_event_pin_code_request_get_bd_addr(packet, addr); 1733 hci_stack->link_key_db->delete_link_key(addr); 1734 break; 1735 1736 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1737 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1738 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1739 break; 1740 1741 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1742 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1743 if (!hci_stack->ssp_auto_accept) break; 1744 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1745 break; 1746 1747 case HCI_EVENT_USER_PASSKEY_REQUEST: 1748 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1749 if (!hci_stack->ssp_auto_accept) break; 1750 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1751 break; 1752 #endif 1753 1754 case HCI_EVENT_ENCRYPTION_CHANGE: 1755 handle = little_endian_read_16(packet, 3); 1756 conn = hci_connection_for_handle(handle); 1757 if (!conn) break; 1758 if (packet[2] == 0) { 1759 if (packet[5]){ 1760 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1761 } else { 1762 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1763 } 1764 } 1765 #ifdef ENABLE_CLASSIC 1766 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1767 #endif 1768 break; 1769 1770 #ifdef ENABLE_CLASSIC 1771 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1772 handle = little_endian_read_16(packet, 3); 1773 conn = hci_connection_for_handle(handle); 1774 if (!conn) break; 1775 1776 // dedicated bonding: send result and disconnect 1777 if (conn->bonding_flags & BONDING_DEDICATED){ 1778 conn->bonding_flags &= ~BONDING_DEDICATED; 1779 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1780 conn->bonding_status = packet[2]; 1781 break; 1782 } 1783 1784 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1785 // link key sufficient for requested security 1786 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1787 break; 1788 } 1789 // not enough 1790 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1791 break; 1792 #endif 1793 1794 // HCI_EVENT_DISCONNECTION_COMPLETE 1795 // has been split, to first notify stack before shutting connection down 1796 // see end of function, too. 1797 case HCI_EVENT_DISCONNECTION_COMPLETE: 1798 if (packet[2]) break; // status != 0 1799 handle = little_endian_read_16(packet, 3); 1800 // drop outgoing ACL fragments if it is for closed connection 1801 if (hci_stack->acl_fragmentation_total_size > 0) { 1802 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1803 log_info("hci: drop fragmented ACL data for closed connection"); 1804 hci_stack->acl_fragmentation_total_size = 0; 1805 hci_stack->acl_fragmentation_pos = 0; 1806 } 1807 } 1808 1809 // re-enable advertisements for le connections if active 1810 conn = hci_connection_for_handle(handle); 1811 if (!conn) break; 1812 #ifdef ENABLE_BLE 1813 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1814 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1815 } 1816 #endif 1817 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1818 break; 1819 1820 case HCI_EVENT_HARDWARE_ERROR: 1821 log_error("Hardware Error: 0x%02x", packet[2]); 1822 if (hci_stack->hardware_error_callback){ 1823 (*hci_stack->hardware_error_callback)(packet[2]); 1824 } else { 1825 // if no special requests, just reboot stack 1826 hci_power_control_off(); 1827 hci_power_control_on(); 1828 } 1829 break; 1830 1831 case HCI_EVENT_ROLE_CHANGE: 1832 if (packet[2]) break; // status != 0 1833 handle = little_endian_read_16(packet, 3); 1834 conn = hci_connection_for_handle(handle); 1835 if (!conn) break; // no conn 1836 conn->role = packet[9]; 1837 break; 1838 1839 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1840 // release packet buffer only for asynchronous transport and if there are not further fragements 1841 if (hci_transport_synchronous()) { 1842 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1843 return; // instead of break: to avoid re-entering hci_run() 1844 } 1845 if (hci_stack->acl_fragmentation_total_size) break; 1846 hci_release_packet_buffer(); 1847 1848 // L2CAP receives this event via the hci_emit_event below 1849 1850 #ifdef ENABLE_CLASSIC 1851 // For SCO, we do the can_send_now_check here 1852 hci_notify_if_sco_can_send_now(); 1853 #endif 1854 break; 1855 1856 #ifdef ENABLE_CLASSIC 1857 case HCI_EVENT_SCO_CAN_SEND_NOW: 1858 // For SCO, we do the can_send_now_check here 1859 hci_notify_if_sco_can_send_now(); 1860 return; 1861 #endif 1862 1863 #ifdef ENABLE_BLE 1864 case HCI_EVENT_LE_META: 1865 switch (packet[2]){ 1866 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1867 // log_info("advertising report received"); 1868 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1869 le_handle_advertisement_report(packet, size); 1870 break; 1871 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1872 // Connection management 1873 reverse_bd_addr(&packet[8], addr); 1874 addr_type = (bd_addr_type_t)packet[7]; 1875 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1876 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1877 // if auto-connect, remove from whitelist in both roles 1878 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1879 hci_remove_from_whitelist(addr_type, addr); 1880 } 1881 // handle error: error is reported only to the initiator -> outgoing connection 1882 if (packet[3]){ 1883 // outgoing connection establishment is done 1884 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1885 // remove entry 1886 if (conn){ 1887 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1888 btstack_memory_hci_connection_free( conn ); 1889 } 1890 break; 1891 } 1892 // on success, both hosts receive connection complete event 1893 if (packet[6] == HCI_ROLE_MASTER){ 1894 // if we're master, it was an outgoing connection and we're done with it 1895 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1896 } else { 1897 // if we're slave, it was an incoming connection, advertisements have stopped 1898 hci_stack->le_advertisements_active = 0; 1899 // try to re-enable them 1900 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1901 } 1902 // LE connections are auto-accepted, so just create a connection if there isn't one already 1903 if (!conn){ 1904 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1905 } 1906 // no memory, sorry. 1907 if (!conn){ 1908 break; 1909 } 1910 1911 conn->state = OPEN; 1912 conn->role = packet[6]; 1913 conn->con_handle = little_endian_read_16(packet, 4); 1914 1915 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1916 1917 // restart timer 1918 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1919 // btstack_run_loop_add_timer(&conn->timeout); 1920 1921 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1922 1923 hci_emit_nr_connections_changed(); 1924 break; 1925 1926 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1927 1928 default: 1929 break; 1930 } 1931 break; 1932 #endif 1933 default: 1934 break; 1935 } 1936 1937 // handle BT initialization 1938 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1939 hci_initializing_event_handler(packet, size); 1940 } 1941 1942 // help with BT sleep 1943 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1944 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1945 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1946 hci_initializing_next_state(); 1947 } 1948 1949 // notify upper stack 1950 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1951 1952 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1953 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1954 if (!packet[2]){ 1955 handle = little_endian_read_16(packet, 3); 1956 hci_connection_t * aConn = hci_connection_for_handle(handle); 1957 if (aConn) { 1958 uint8_t status = aConn->bonding_status; 1959 uint16_t flags = aConn->bonding_flags; 1960 bd_addr_t bd_address; 1961 memcpy(&bd_address, aConn->address, 6); 1962 hci_shutdown_connection(aConn); 1963 // connection struct is gone, don't access anymore 1964 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1965 hci_emit_dedicated_bonding_result(bd_address, status); 1966 } 1967 } 1968 } 1969 } 1970 1971 // execute main loop 1972 hci_run(); 1973 } 1974 1975 #ifdef ENABLE_CLASSIC 1976 static void sco_handler(uint8_t * packet, uint16_t size){ 1977 if (!hci_stack->sco_packet_handler) return; 1978 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1979 } 1980 #endif 1981 1982 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1983 hci_dump_packet(packet_type, 1, packet, size); 1984 switch (packet_type) { 1985 case HCI_EVENT_PACKET: 1986 event_handler(packet, size); 1987 break; 1988 case HCI_ACL_DATA_PACKET: 1989 acl_handler(packet, size); 1990 break; 1991 #ifdef ENABLE_CLASSIC 1992 case HCI_SCO_DATA_PACKET: 1993 sco_handler(packet, size); 1994 break; 1995 #endif 1996 default: 1997 break; 1998 } 1999 } 2000 2001 /** 2002 * @brief Add event packet handler. 2003 */ 2004 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2005 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2006 } 2007 2008 2009 /** Register HCI packet handlers */ 2010 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2011 hci_stack->acl_packet_handler = handler; 2012 } 2013 2014 #ifdef ENABLE_CLASSIC 2015 /** 2016 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2017 */ 2018 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2019 hci_stack->sco_packet_handler = handler; 2020 } 2021 #endif 2022 2023 static void hci_state_reset(void){ 2024 // no connections yet 2025 hci_stack->connections = NULL; 2026 2027 // keep discoverable/connectable as this has been requested by the client(s) 2028 // hci_stack->discoverable = 0; 2029 // hci_stack->connectable = 0; 2030 // hci_stack->bondable = 1; 2031 2032 // buffer is free 2033 hci_stack->hci_packet_buffer_reserved = 0; 2034 2035 // no pending cmds 2036 hci_stack->decline_reason = 0; 2037 hci_stack->new_scan_enable_value = 0xff; 2038 2039 // LE 2040 hci_stack->adv_addr_type = 0; 2041 hci_stack->le_advertisements_random_address_set = 0; 2042 memset(hci_stack->adv_address, 0, 6); 2043 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2044 hci_stack->le_scan_type = 0xff; 2045 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2046 hci_stack->le_whitelist = 0; 2047 hci_stack->le_whitelist_capacity = 0; 2048 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2049 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2050 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2051 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2052 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2053 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2054 } 2055 2056 #ifdef ENABLE_CLASSIC 2057 /** 2058 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2059 */ 2060 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2061 // store and open remote device db 2062 hci_stack->link_key_db = link_key_db; 2063 if (hci_stack->link_key_db) { 2064 hci_stack->link_key_db->open(); 2065 } 2066 } 2067 #endif 2068 2069 void hci_init(const hci_transport_t *transport, const void *config){ 2070 2071 #ifdef HAVE_MALLOC 2072 if (!hci_stack) { 2073 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2074 } 2075 #else 2076 hci_stack = &hci_stack_static; 2077 #endif 2078 memset(hci_stack, 0, sizeof(hci_stack_t)); 2079 2080 // reference to use transport layer implementation 2081 hci_stack->hci_transport = transport; 2082 2083 // reference to used config 2084 hci_stack->config = config; 2085 2086 // setup pointer for outgoing packet buffer 2087 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2088 2089 // max acl payload size defined in config.h 2090 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2091 2092 // register packet handlers with transport 2093 transport->register_packet_handler(&packet_handler); 2094 2095 hci_stack->state = HCI_STATE_OFF; 2096 2097 // class of device 2098 hci_stack->class_of_device = 0x007a020c; // Smartphone 2099 2100 // bondable by default 2101 hci_stack->bondable = 1; 2102 2103 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2104 hci_stack->ssp_enable = 1; 2105 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2106 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2107 hci_stack->ssp_auto_accept = 1; 2108 2109 // voice setting - signed 8 bit pcm data with CVSD over the air 2110 hci_stack->sco_voice_setting = 0x40; 2111 2112 hci_state_reset(); 2113 } 2114 2115 /** 2116 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2117 */ 2118 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2119 hci_stack->chipset = chipset_driver; 2120 2121 // reset chipset driver - init is also called on power_up 2122 if (hci_stack->chipset && hci_stack->chipset->init){ 2123 hci_stack->chipset->init(hci_stack->config); 2124 } 2125 } 2126 2127 /** 2128 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2129 */ 2130 void hci_set_control(const btstack_control_t *hardware_control){ 2131 // references to used control implementation 2132 hci_stack->control = hardware_control; 2133 // init with transport config 2134 hardware_control->init(hci_stack->config); 2135 } 2136 2137 void hci_close(void){ 2138 // close remote device db 2139 if (hci_stack->link_key_db) { 2140 hci_stack->link_key_db->close(); 2141 } 2142 2143 btstack_linked_list_iterator_t lit; 2144 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2145 while (btstack_linked_list_iterator_has_next(&lit)){ 2146 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2147 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2148 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2149 hci_shutdown_connection(connection); 2150 } 2151 2152 hci_power_control(HCI_POWER_OFF); 2153 2154 #ifdef HAVE_MALLOC 2155 free(hci_stack); 2156 #endif 2157 hci_stack = NULL; 2158 } 2159 2160 #ifdef ENABLE_CLASSIC 2161 void gap_set_class_of_device(uint32_t class_of_device){ 2162 hci_stack->class_of_device = class_of_device; 2163 } 2164 #endif 2165 2166 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2167 void hci_set_bd_addr(bd_addr_t addr){ 2168 memcpy(hci_stack->custom_bd_addr, addr, 6); 2169 hci_stack->custom_bd_addr_set = 1; 2170 } 2171 2172 void hci_disable_l2cap_timeout_check(void){ 2173 disable_l2cap_timeouts = 1; 2174 } 2175 // State-Module-Driver overview 2176 // state module low-level 2177 // HCI_STATE_OFF off close 2178 // HCI_STATE_INITIALIZING, on open 2179 // HCI_STATE_WORKING, on open 2180 // HCI_STATE_HALTING, on open 2181 // HCI_STATE_SLEEPING, off/sleep close 2182 // HCI_STATE_FALLING_ASLEEP on open 2183 2184 static int hci_power_control_on(void){ 2185 2186 // power on 2187 int err = 0; 2188 if (hci_stack->control && hci_stack->control->on){ 2189 err = (*hci_stack->control->on)(); 2190 } 2191 if (err){ 2192 log_error( "POWER_ON failed"); 2193 hci_emit_hci_open_failed(); 2194 return err; 2195 } 2196 2197 // int chipset driver 2198 if (hci_stack->chipset && hci_stack->chipset->init){ 2199 hci_stack->chipset->init(hci_stack->config); 2200 } 2201 2202 // init transport 2203 if (hci_stack->hci_transport->init){ 2204 hci_stack->hci_transport->init(hci_stack->config); 2205 } 2206 2207 // open transport 2208 err = hci_stack->hci_transport->open(); 2209 if (err){ 2210 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2211 if (hci_stack->control && hci_stack->control->off){ 2212 (*hci_stack->control->off)(); 2213 } 2214 hci_emit_hci_open_failed(); 2215 return err; 2216 } 2217 return 0; 2218 } 2219 2220 static void hci_power_control_off(void){ 2221 2222 log_info("hci_power_control_off"); 2223 2224 // close low-level device 2225 hci_stack->hci_transport->close(); 2226 2227 log_info("hci_power_control_off - hci_transport closed"); 2228 2229 // power off 2230 if (hci_stack->control && hci_stack->control->off){ 2231 (*hci_stack->control->off)(); 2232 } 2233 2234 log_info("hci_power_control_off - control closed"); 2235 2236 hci_stack->state = HCI_STATE_OFF; 2237 } 2238 2239 static void hci_power_control_sleep(void){ 2240 2241 log_info("hci_power_control_sleep"); 2242 2243 #if 0 2244 // don't close serial port during sleep 2245 2246 // close low-level device 2247 hci_stack->hci_transport->close(hci_stack->config); 2248 #endif 2249 2250 // sleep mode 2251 if (hci_stack->control && hci_stack->control->sleep){ 2252 (*hci_stack->control->sleep)(); 2253 } 2254 2255 hci_stack->state = HCI_STATE_SLEEPING; 2256 } 2257 2258 static int hci_power_control_wake(void){ 2259 2260 log_info("hci_power_control_wake"); 2261 2262 // wake on 2263 if (hci_stack->control && hci_stack->control->wake){ 2264 (*hci_stack->control->wake)(); 2265 } 2266 2267 #if 0 2268 // open low-level device 2269 int err = hci_stack->hci_transport->open(hci_stack->config); 2270 if (err){ 2271 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2272 if (hci_stack->control && hci_stack->control->off){ 2273 (*hci_stack->control->off)(); 2274 } 2275 hci_emit_hci_open_failed(); 2276 return err; 2277 } 2278 #endif 2279 2280 return 0; 2281 } 2282 2283 static void hci_power_transition_to_initializing(void){ 2284 // set up state machine 2285 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2286 hci_stack->hci_packet_buffer_reserved = 0; 2287 hci_stack->state = HCI_STATE_INITIALIZING; 2288 hci_stack->substate = HCI_INIT_SEND_RESET; 2289 } 2290 2291 int hci_power_control(HCI_POWER_MODE power_mode){ 2292 2293 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2294 2295 int err = 0; 2296 switch (hci_stack->state){ 2297 2298 case HCI_STATE_OFF: 2299 switch (power_mode){ 2300 case HCI_POWER_ON: 2301 err = hci_power_control_on(); 2302 if (err) { 2303 log_error("hci_power_control_on() error %d", err); 2304 return err; 2305 } 2306 hci_power_transition_to_initializing(); 2307 break; 2308 case HCI_POWER_OFF: 2309 // do nothing 2310 break; 2311 case HCI_POWER_SLEEP: 2312 // do nothing (with SLEEP == OFF) 2313 break; 2314 } 2315 break; 2316 2317 case HCI_STATE_INITIALIZING: 2318 switch (power_mode){ 2319 case HCI_POWER_ON: 2320 // do nothing 2321 break; 2322 case HCI_POWER_OFF: 2323 // no connections yet, just turn it off 2324 hci_power_control_off(); 2325 break; 2326 case HCI_POWER_SLEEP: 2327 // no connections yet, just turn it off 2328 hci_power_control_sleep(); 2329 break; 2330 } 2331 break; 2332 2333 case HCI_STATE_WORKING: 2334 switch (power_mode){ 2335 case HCI_POWER_ON: 2336 // do nothing 2337 break; 2338 case HCI_POWER_OFF: 2339 // see hci_run 2340 hci_stack->state = HCI_STATE_HALTING; 2341 break; 2342 case HCI_POWER_SLEEP: 2343 // see hci_run 2344 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2345 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2346 break; 2347 } 2348 break; 2349 2350 case HCI_STATE_HALTING: 2351 switch (power_mode){ 2352 case HCI_POWER_ON: 2353 hci_power_transition_to_initializing(); 2354 break; 2355 case HCI_POWER_OFF: 2356 // do nothing 2357 break; 2358 case HCI_POWER_SLEEP: 2359 // see hci_run 2360 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2361 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2362 break; 2363 } 2364 break; 2365 2366 case HCI_STATE_FALLING_ASLEEP: 2367 switch (power_mode){ 2368 case HCI_POWER_ON: 2369 2370 #ifdef HAVE_PLATFORM_IPHONE_OS 2371 // nothing to do, if H4 supports power management 2372 if (btstack_control_iphone_power_management_enabled()){ 2373 hci_stack->state = HCI_STATE_INITIALIZING; 2374 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2375 break; 2376 } 2377 #endif 2378 hci_power_transition_to_initializing(); 2379 break; 2380 case HCI_POWER_OFF: 2381 // see hci_run 2382 hci_stack->state = HCI_STATE_HALTING; 2383 break; 2384 case HCI_POWER_SLEEP: 2385 // do nothing 2386 break; 2387 } 2388 break; 2389 2390 case HCI_STATE_SLEEPING: 2391 switch (power_mode){ 2392 case HCI_POWER_ON: 2393 2394 #ifdef HAVE_PLATFORM_IPHONE_OS 2395 // nothing to do, if H4 supports power management 2396 if (btstack_control_iphone_power_management_enabled()){ 2397 hci_stack->state = HCI_STATE_INITIALIZING; 2398 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2399 hci_update_scan_enable(); 2400 break; 2401 } 2402 #endif 2403 err = hci_power_control_wake(); 2404 if (err) return err; 2405 hci_power_transition_to_initializing(); 2406 break; 2407 case HCI_POWER_OFF: 2408 hci_stack->state = HCI_STATE_HALTING; 2409 break; 2410 case HCI_POWER_SLEEP: 2411 // do nothing 2412 break; 2413 } 2414 break; 2415 } 2416 2417 // create internal event 2418 hci_emit_state(); 2419 2420 // trigger next/first action 2421 hci_run(); 2422 2423 return 0; 2424 } 2425 2426 2427 #ifdef ENABLE_CLASSIC 2428 2429 static void hci_update_scan_enable(void){ 2430 // 2 = page scan, 1 = inq scan 2431 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2432 hci_run(); 2433 } 2434 2435 void gap_discoverable_control(uint8_t enable){ 2436 if (enable) enable = 1; // normalize argument 2437 2438 if (hci_stack->discoverable == enable){ 2439 hci_emit_discoverable_enabled(hci_stack->discoverable); 2440 return; 2441 } 2442 2443 hci_stack->discoverable = enable; 2444 hci_update_scan_enable(); 2445 } 2446 2447 void gap_connectable_control(uint8_t enable){ 2448 if (enable) enable = 1; // normalize argument 2449 2450 // don't emit event 2451 if (hci_stack->connectable == enable) return; 2452 2453 hci_stack->connectable = enable; 2454 hci_update_scan_enable(); 2455 } 2456 #endif 2457 2458 void gap_local_bd_addr(bd_addr_t address_buffer){ 2459 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2460 } 2461 2462 static void hci_run(void){ 2463 2464 // log_info("hci_run: entered"); 2465 btstack_linked_item_t * it; 2466 2467 // send continuation fragments first, as they block the prepared packet buffer 2468 if (hci_stack->acl_fragmentation_total_size > 0) { 2469 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2470 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2471 if (connection) { 2472 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2473 hci_send_acl_packet_fragments(connection); 2474 return; 2475 } 2476 } else { 2477 // connection gone -> discard further fragments 2478 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2479 hci_stack->acl_fragmentation_total_size = 0; 2480 hci_stack->acl_fragmentation_pos = 0; 2481 } 2482 } 2483 2484 if (!hci_can_send_command_packet_now()) return; 2485 2486 // global/non-connection oriented commands 2487 2488 #ifdef ENABLE_CLASSIC 2489 // decline incoming connections 2490 if (hci_stack->decline_reason){ 2491 uint8_t reason = hci_stack->decline_reason; 2492 hci_stack->decline_reason = 0; 2493 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2494 return; 2495 } 2496 2497 // send scan enable 2498 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2499 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2500 hci_stack->new_scan_enable_value = 0xff; 2501 return; 2502 } 2503 #endif 2504 2505 #ifdef ENABLE_BLE 2506 if (hci_stack->state == HCI_STATE_WORKING){ 2507 // handle le scan 2508 switch(hci_stack->le_scanning_state){ 2509 case LE_START_SCAN: 2510 hci_stack->le_scanning_state = LE_SCANNING; 2511 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2512 return; 2513 2514 case LE_STOP_SCAN: 2515 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2516 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2517 return; 2518 default: 2519 break; 2520 } 2521 if (hci_stack->le_scan_type != 0xff){ 2522 // defaults: active scanning, accept all advertisement packets 2523 int scan_type = hci_stack->le_scan_type; 2524 hci_stack->le_scan_type = 0xff; 2525 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); 2526 return; 2527 } 2528 // le advertisement control 2529 if (hci_stack->le_advertisements_todo){ 2530 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2531 } 2532 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2533 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2534 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2535 return; 2536 } 2537 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2538 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2539 hci_send_cmd(&hci_le_set_advertising_parameters, 2540 hci_stack->le_advertisements_interval_min, 2541 hci_stack->le_advertisements_interval_max, 2542 hci_stack->le_advertisements_type, 2543 hci_stack->le_advertisements_own_address_type, 2544 hci_stack->le_advertisements_direct_address_type, 2545 hci_stack->le_advertisements_direct_address, 2546 hci_stack->le_advertisements_channel_map, 2547 hci_stack->le_advertisements_filter_policy); 2548 return; 2549 } 2550 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2551 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2552 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2553 hci_stack->le_advertisements_data); 2554 return; 2555 } 2556 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2557 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2558 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2559 hci_stack->le_scan_response_data); 2560 return; 2561 } 2562 // Random address needs to be set before enabling advertisements 2563 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE) 2564 && (hci_stack->le_advertisements_own_address_type == 0 || hci_stack->le_advertisements_random_address_set)){ 2565 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2566 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2567 return; 2568 } 2569 2570 // 2571 // LE Whitelist Management 2572 // 2573 2574 // check if whitelist needs modification 2575 btstack_linked_list_iterator_t lit; 2576 int modification_pending = 0; 2577 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2578 while (btstack_linked_list_iterator_has_next(&lit)){ 2579 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2580 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2581 modification_pending = 1; 2582 break; 2583 } 2584 } 2585 2586 if (modification_pending){ 2587 // stop connnecting if modification pending 2588 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2589 hci_send_cmd(&hci_le_create_connection_cancel); 2590 return; 2591 } 2592 2593 // add/remove entries 2594 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2595 while (btstack_linked_list_iterator_has_next(&lit)){ 2596 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2597 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2598 entry->state = LE_WHITELIST_ON_CONTROLLER; 2599 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2600 return; 2601 2602 } 2603 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2604 bd_addr_t address; 2605 bd_addr_type_t address_type = entry->address_type; 2606 memcpy(address, entry->address, 6); 2607 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2608 btstack_memory_whitelist_entry_free(entry); 2609 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2610 return; 2611 } 2612 } 2613 } 2614 2615 // start connecting 2616 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2617 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2618 bd_addr_t null_addr; 2619 memset(null_addr, 0, 6); 2620 hci_send_cmd(&hci_le_create_connection, 2621 0x0060, // scan interval: 60 ms 2622 0x0030, // scan interval: 30 ms 2623 1, // use whitelist 2624 0, // peer address type 2625 null_addr, // peer bd addr 2626 hci_stack->adv_addr_type, // our addr type: 2627 0x0008, // conn interval min 2628 0x0018, // conn interval max 2629 0, // conn latency 2630 0x0048, // supervision timeout 2631 0x0001, // min ce length 2632 0x0001 // max ce length 2633 ); 2634 return; 2635 } 2636 } 2637 #endif 2638 2639 // send pending HCI commands 2640 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2641 hci_connection_t * connection = (hci_connection_t *) it; 2642 2643 switch(connection->state){ 2644 case SEND_CREATE_CONNECTION: 2645 switch(connection->address_type){ 2646 #ifdef ENABLE_CLASSIC 2647 case BD_ADDR_TYPE_CLASSIC: 2648 log_info("sending hci_create_connection"); 2649 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2650 break; 2651 #endif 2652 default: 2653 #ifdef ENABLE_BLE 2654 log_info("sending hci_le_create_connection"); 2655 hci_send_cmd(&hci_le_create_connection, 2656 0x0060, // scan interval: 60 ms 2657 0x0030, // scan interval: 30 ms 2658 0, // don't use whitelist 2659 connection->address_type, // peer address type 2660 connection->address, // peer bd addr 2661 hci_stack->adv_addr_type, // our addr type: 2662 0x0008, // conn interval min 2663 0x0018, // conn interval max 2664 0, // conn latency 2665 0x0048, // supervision timeout 2666 0x0001, // min ce length 2667 0x0001 // max ce length 2668 ); 2669 2670 connection->state = SENT_CREATE_CONNECTION; 2671 #endif 2672 break; 2673 } 2674 return; 2675 2676 #ifdef ENABLE_CLASSIC 2677 case RECEIVED_CONNECTION_REQUEST: 2678 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2679 connection->state = ACCEPTED_CONNECTION_REQUEST; 2680 connection->role = HCI_ROLE_SLAVE; 2681 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2682 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2683 } 2684 return; 2685 #endif 2686 2687 #ifdef ENABLE_BLE 2688 case SEND_CANCEL_CONNECTION: 2689 connection->state = SENT_CANCEL_CONNECTION; 2690 hci_send_cmd(&hci_le_create_connection_cancel); 2691 return; 2692 #endif 2693 case SEND_DISCONNECT: 2694 connection->state = SENT_DISCONNECT; 2695 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2696 return; 2697 2698 default: 2699 break; 2700 } 2701 2702 #ifdef ENABLE_CLASSIC 2703 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2704 log_info("responding to link key request"); 2705 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2706 link_key_t link_key; 2707 link_key_type_t link_key_type; 2708 if ( hci_stack->link_key_db 2709 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2710 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2711 connection->link_key_type = link_key_type; 2712 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2713 } else { 2714 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2715 } 2716 return; 2717 } 2718 2719 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2720 log_info("denying to pin request"); 2721 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2722 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2723 return; 2724 } 2725 2726 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2727 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2728 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2729 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2730 // tweak authentication requirements 2731 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2732 if (connection->bonding_flags & BONDING_DEDICATED){ 2733 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2734 } 2735 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2736 authreq |= 1; 2737 } 2738 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2739 } else { 2740 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2741 } 2742 return; 2743 } 2744 2745 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2746 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2747 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2748 return; 2749 } 2750 2751 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2752 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2753 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2754 return; 2755 } 2756 #endif 2757 2758 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2759 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2760 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2761 return; 2762 } 2763 2764 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2765 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2766 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2767 return; 2768 } 2769 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2770 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2771 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2772 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2773 return; 2774 } 2775 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2776 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2777 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2778 return; 2779 } 2780 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2781 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2782 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2783 return; 2784 } 2785 2786 #ifdef ENABLE_BLE 2787 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2788 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2789 2790 uint16_t connection_interval_min = connection->le_conn_interval_min; 2791 connection->le_conn_interval_min = 0; 2792 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2793 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2794 0x0000, 0xffff); 2795 } 2796 #endif 2797 } 2798 2799 hci_connection_t * connection; 2800 switch (hci_stack->state){ 2801 case HCI_STATE_INITIALIZING: 2802 hci_initializing_run(); 2803 break; 2804 2805 case HCI_STATE_HALTING: 2806 2807 log_info("HCI_STATE_HALTING"); 2808 2809 // free whitelist entries 2810 #ifdef ENABLE_BLE 2811 { 2812 btstack_linked_list_iterator_t lit; 2813 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2814 while (btstack_linked_list_iterator_has_next(&lit)){ 2815 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2816 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2817 btstack_memory_whitelist_entry_free(entry); 2818 } 2819 } 2820 #endif 2821 // close all open connections 2822 connection = (hci_connection_t *) hci_stack->connections; 2823 if (connection){ 2824 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2825 if (!hci_can_send_command_packet_now()) return; 2826 2827 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2828 2829 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2830 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2831 2832 // ... which would be ignored anyway as we shutdown (free) the connection now 2833 hci_shutdown_connection(connection); 2834 2835 // finally, send the disconnect command 2836 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2837 return; 2838 } 2839 log_info("HCI_STATE_HALTING, calling off"); 2840 2841 // switch mode 2842 hci_power_control_off(); 2843 2844 log_info("HCI_STATE_HALTING, emitting state"); 2845 hci_emit_state(); 2846 log_info("HCI_STATE_HALTING, done"); 2847 break; 2848 2849 case HCI_STATE_FALLING_ASLEEP: 2850 switch(hci_stack->substate) { 2851 case HCI_FALLING_ASLEEP_DISCONNECT: 2852 log_info("HCI_STATE_FALLING_ASLEEP"); 2853 // close all open connections 2854 connection = (hci_connection_t *) hci_stack->connections; 2855 2856 #ifdef HAVE_PLATFORM_IPHONE_OS 2857 // don't close connections, if H4 supports power management 2858 if (btstack_control_iphone_power_management_enabled()){ 2859 connection = NULL; 2860 } 2861 #endif 2862 if (connection){ 2863 2864 // send disconnect 2865 if (!hci_can_send_command_packet_now()) return; 2866 2867 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2868 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2869 2870 // send disconnected event right away - causes higher layer connections to get closed, too. 2871 hci_shutdown_connection(connection); 2872 return; 2873 } 2874 2875 if (hci_classic_supported()){ 2876 // disable page and inquiry scan 2877 if (!hci_can_send_command_packet_now()) return; 2878 2879 log_info("HCI_STATE_HALTING, disabling inq scans"); 2880 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2881 2882 // continue in next sub state 2883 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2884 break; 2885 } 2886 // no break - fall through for ble-only chips 2887 2888 case HCI_FALLING_ASLEEP_COMPLETE: 2889 log_info("HCI_STATE_HALTING, calling sleep"); 2890 #ifdef HAVE_PLATFORM_IPHONE_OS 2891 // don't actually go to sleep, if H4 supports power management 2892 if (btstack_control_iphone_power_management_enabled()){ 2893 // SLEEP MODE reached 2894 hci_stack->state = HCI_STATE_SLEEPING; 2895 hci_emit_state(); 2896 break; 2897 } 2898 #endif 2899 // switch mode 2900 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2901 hci_emit_state(); 2902 break; 2903 2904 default: 2905 break; 2906 } 2907 break; 2908 2909 default: 2910 break; 2911 } 2912 } 2913 2914 int hci_send_cmd_packet(uint8_t *packet, int size){ 2915 // house-keeping 2916 2917 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2918 hci_stack->loopback_mode = packet[3]; 2919 } 2920 2921 #ifdef ENABLE_CLASSIC 2922 bd_addr_t addr; 2923 hci_connection_t * conn; 2924 2925 // create_connection? 2926 if (IS_COMMAND(packet, hci_create_connection)){ 2927 reverse_bd_addr(&packet[3], addr); 2928 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2929 2930 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2931 if (!conn){ 2932 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2933 if (!conn){ 2934 // notify client that alloc failed 2935 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2936 return 0; // don't sent packet to controller 2937 } 2938 conn->state = SEND_CREATE_CONNECTION; 2939 } 2940 log_info("conn state %u", conn->state); 2941 switch (conn->state){ 2942 // if connection active exists 2943 case OPEN: 2944 // and OPEN, emit connection complete command, don't send to controller 2945 hci_emit_connection_complete(addr, conn->con_handle, 0); 2946 return 0; 2947 case SEND_CREATE_CONNECTION: 2948 // connection created by hci, e.g. dedicated bonding 2949 break; 2950 default: 2951 // otherwise, just ignore as it is already in the open process 2952 return 0; 2953 } 2954 conn->state = SENT_CREATE_CONNECTION; 2955 } 2956 2957 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2958 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2959 } 2960 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2961 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2962 } 2963 2964 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2965 if (hci_stack->link_key_db){ 2966 reverse_bd_addr(&packet[3], addr); 2967 hci_stack->link_key_db->delete_link_key(addr); 2968 } 2969 } 2970 2971 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2972 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2973 reverse_bd_addr(&packet[3], addr); 2974 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2975 if (conn){ 2976 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2977 } 2978 } 2979 2980 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2981 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2982 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2983 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2984 reverse_bd_addr(&packet[3], addr); 2985 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2986 if (conn){ 2987 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2988 } 2989 } 2990 #endif 2991 2992 #ifdef ENABLE_BLE 2993 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2994 hci_stack->adv_addr_type = packet[8]; 2995 } 2996 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2997 hci_stack->le_advertisements_random_address_set = 1; 2998 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2999 } 3000 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3001 hci_stack->le_advertisements_active = packet[3]; 3002 } 3003 if (IS_COMMAND(packet, hci_le_create_connection)){ 3004 // white list used? 3005 uint8_t initiator_filter_policy = packet[7]; 3006 switch (initiator_filter_policy){ 3007 case 0: 3008 // whitelist not used 3009 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3010 break; 3011 case 1: 3012 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3013 break; 3014 default: 3015 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3016 break; 3017 } 3018 } 3019 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3020 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3021 } 3022 #endif 3023 3024 hci_stack->num_cmd_packets--; 3025 3026 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3027 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3028 3029 // release packet buffer for synchronous transport implementations 3030 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3031 hci_stack->hci_packet_buffer_reserved = 0; 3032 } 3033 3034 return err; 3035 } 3036 3037 // disconnect because of security block 3038 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3039 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3040 if (!connection) return; 3041 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3042 } 3043 3044 3045 // Configure Secure Simple Pairing 3046 3047 #ifdef ENABLE_CLASSIC 3048 3049 // enable will enable SSP during init 3050 void gap_ssp_set_enable(int enable){ 3051 hci_stack->ssp_enable = enable; 3052 } 3053 3054 static int hci_local_ssp_activated(void){ 3055 return gap_ssp_supported() && hci_stack->ssp_enable; 3056 } 3057 3058 // if set, BTstack will respond to io capability request using authentication requirement 3059 void gap_ssp_set_io_capability(int io_capability){ 3060 hci_stack->ssp_io_capability = io_capability; 3061 } 3062 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3063 hci_stack->ssp_authentication_requirement = authentication_requirement; 3064 } 3065 3066 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3067 void gap_ssp_set_auto_accept(int auto_accept){ 3068 hci_stack->ssp_auto_accept = auto_accept; 3069 } 3070 #endif 3071 3072 // va_list part of hci_send_cmd 3073 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3074 if (!hci_can_send_command_packet_now()){ 3075 log_error("hci_send_cmd called but cannot send packet now"); 3076 return 0; 3077 } 3078 3079 // for HCI INITIALIZATION 3080 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3081 hci_stack->last_cmd_opcode = cmd->opcode; 3082 3083 hci_reserve_packet_buffer(); 3084 uint8_t * packet = hci_stack->hci_packet_buffer; 3085 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3086 return hci_send_cmd_packet(packet, size); 3087 } 3088 3089 /** 3090 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3091 */ 3092 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3093 va_list argptr; 3094 va_start(argptr, cmd); 3095 int res = hci_send_cmd_va_arg(cmd, argptr); 3096 va_end(argptr); 3097 return res; 3098 } 3099 3100 // Create various non-HCI events. 3101 // TODO: generalize, use table similar to hci_create_command 3102 3103 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3104 // dump packet 3105 if (dump) { 3106 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3107 } 3108 3109 // dispatch to all event handlers 3110 btstack_linked_list_iterator_t it; 3111 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3112 while (btstack_linked_list_iterator_has_next(&it)){ 3113 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3114 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3115 } 3116 } 3117 3118 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3119 if (!hci_stack->acl_packet_handler) return; 3120 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3121 } 3122 3123 #ifdef ENABLE_CLASSIC 3124 static void hci_notify_if_sco_can_send_now(void){ 3125 // notify SCO sender if waiting 3126 if (!hci_stack->sco_waiting_for_can_send_now) return; 3127 if (hci_can_send_sco_packet_now()){ 3128 hci_stack->sco_waiting_for_can_send_now = 0; 3129 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3130 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3131 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3132 } 3133 } 3134 #endif 3135 3136 void hci_emit_state(void){ 3137 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3138 uint8_t event[3]; 3139 event[0] = BTSTACK_EVENT_STATE; 3140 event[1] = sizeof(event) - 2; 3141 event[2] = hci_stack->state; 3142 hci_emit_event(event, sizeof(event), 1); 3143 } 3144 3145 #ifdef ENABLE_CLASSIC 3146 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3147 uint8_t event[13]; 3148 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3149 event[1] = sizeof(event) - 2; 3150 event[2] = status; 3151 little_endian_store_16(event, 3, con_handle); 3152 reverse_bd_addr(address, &event[5]); 3153 event[11] = 1; // ACL connection 3154 event[12] = 0; // encryption disabled 3155 hci_emit_event(event, sizeof(event), 1); 3156 } 3157 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3158 if (disable_l2cap_timeouts) return; 3159 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3160 uint8_t event[4]; 3161 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3162 event[1] = sizeof(event) - 2; 3163 little_endian_store_16(event, 2, conn->con_handle); 3164 hci_emit_event(event, sizeof(event), 1); 3165 } 3166 #endif 3167 3168 #ifdef ENABLE_BLE 3169 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3170 uint8_t event[21]; 3171 event[0] = HCI_EVENT_LE_META; 3172 event[1] = sizeof(event) - 2; 3173 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3174 event[3] = status; 3175 little_endian_store_16(event, 4, con_handle); 3176 event[6] = 0; // TODO: role 3177 event[7] = address_type; 3178 reverse_bd_addr(address, &event[8]); 3179 little_endian_store_16(event, 14, 0); // interval 3180 little_endian_store_16(event, 16, 0); // latency 3181 little_endian_store_16(event, 18, 0); // supervision timeout 3182 event[20] = 0; // master clock accuracy 3183 hci_emit_event(event, sizeof(event), 1); 3184 } 3185 #endif 3186 3187 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3188 uint8_t event[6]; 3189 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3190 event[1] = sizeof(event) - 2; 3191 event[2] = 0; // status = OK 3192 little_endian_store_16(event, 3, con_handle); 3193 event[5] = reason; 3194 hci_emit_event(event, sizeof(event), 1); 3195 } 3196 3197 static void hci_emit_nr_connections_changed(void){ 3198 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3199 uint8_t event[3]; 3200 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3201 event[1] = sizeof(event) - 2; 3202 event[2] = nr_hci_connections(); 3203 hci_emit_event(event, sizeof(event), 1); 3204 } 3205 3206 static void hci_emit_hci_open_failed(void){ 3207 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3208 uint8_t event[2]; 3209 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3210 event[1] = sizeof(event) - 2; 3211 hci_emit_event(event, sizeof(event), 1); 3212 } 3213 3214 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3215 log_info("hci_emit_dedicated_bonding_result %u ", status); 3216 uint8_t event[9]; 3217 int pos = 0; 3218 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3219 event[pos++] = sizeof(event) - 2; 3220 event[pos++] = status; 3221 reverse_bd_addr(address, &event[pos]); 3222 hci_emit_event(event, sizeof(event), 1); 3223 } 3224 3225 3226 #ifdef ENABLE_CLASSIC 3227 3228 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3229 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3230 uint8_t event[5]; 3231 int pos = 0; 3232 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3233 event[pos++] = sizeof(event) - 2; 3234 little_endian_store_16(event, 2, con_handle); 3235 pos += 2; 3236 event[pos++] = level; 3237 hci_emit_event(event, sizeof(event), 1); 3238 } 3239 3240 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3241 if (!connection) return LEVEL_0; 3242 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3243 return gap_security_level_for_link_key_type(connection->link_key_type); 3244 } 3245 3246 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3247 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3248 uint8_t event[3]; 3249 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3250 event[1] = sizeof(event) - 2; 3251 event[2] = enabled; 3252 hci_emit_event(event, sizeof(event), 1); 3253 } 3254 3255 // query if remote side supports eSCO 3256 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3257 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3258 if (!connection) return 0; 3259 return connection->remote_supported_feature_eSCO; 3260 } 3261 3262 // query if remote side supports SSP 3263 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3264 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3265 if (!connection) return 0; 3266 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3267 } 3268 3269 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3270 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3271 } 3272 3273 // GAP API 3274 /** 3275 * @bbrief enable/disable bonding. default is enabled 3276 * @praram enabled 3277 */ 3278 void gap_set_bondable_mode(int enable){ 3279 hci_stack->bondable = enable ? 1 : 0; 3280 } 3281 /** 3282 * @brief Get bondable mode. 3283 * @return 1 if bondable 3284 */ 3285 int gap_get_bondable_mode(void){ 3286 return hci_stack->bondable; 3287 } 3288 3289 /** 3290 * @brief map link keys to security levels 3291 */ 3292 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3293 switch (link_key_type){ 3294 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3295 return LEVEL_4; 3296 case COMBINATION_KEY: 3297 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3298 return LEVEL_3; 3299 default: 3300 return LEVEL_2; 3301 } 3302 } 3303 3304 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3305 log_info("gap_mitm_protection_required_for_security_level %u", level); 3306 return level > LEVEL_2; 3307 } 3308 3309 /** 3310 * @brief get current security level 3311 */ 3312 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3313 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3314 if (!connection) return LEVEL_0; 3315 return gap_security_level_for_connection(connection); 3316 } 3317 3318 /** 3319 * @brief request connection to device to 3320 * @result GAP_AUTHENTICATION_RESULT 3321 */ 3322 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3323 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3324 if (!connection){ 3325 hci_emit_security_level(con_handle, LEVEL_0); 3326 return; 3327 } 3328 gap_security_level_t current_level = gap_security_level(con_handle); 3329 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3330 if (current_level >= requested_level){ 3331 hci_emit_security_level(con_handle, current_level); 3332 return; 3333 } 3334 3335 connection->requested_security_level = requested_level; 3336 3337 #if 0 3338 // sending encryption request without a link key results in an error. 3339 // TODO: figure out how to use it properly 3340 3341 // would enabling ecnryption suffice (>= LEVEL_2)? 3342 if (hci_stack->link_key_db){ 3343 link_key_type_t link_key_type; 3344 link_key_t link_key; 3345 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3346 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3347 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3348 return; 3349 } 3350 } 3351 } 3352 #endif 3353 3354 // try to authenticate connection 3355 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3356 hci_run(); 3357 } 3358 3359 /** 3360 * @brief start dedicated bonding with device. disconnect after bonding 3361 * @param device 3362 * @param request MITM protection 3363 * @result GAP_DEDICATED_BONDING_COMPLETE 3364 */ 3365 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3366 3367 // create connection state machine 3368 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3369 3370 if (!connection){ 3371 return BTSTACK_MEMORY_ALLOC_FAILED; 3372 } 3373 3374 // delete linkn key 3375 gap_drop_link_key_for_bd_addr(device); 3376 3377 // configure LEVEL_2/3, dedicated bonding 3378 connection->state = SEND_CREATE_CONNECTION; 3379 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3380 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3381 connection->bonding_flags = BONDING_DEDICATED; 3382 3383 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3384 3385 // handle: connnection failure (connection complete != ok) 3386 // handle: authentication failure 3387 // handle: disconnect on done 3388 3389 hci_run(); 3390 3391 return 0; 3392 } 3393 #endif 3394 3395 void gap_set_local_name(const char * local_name){ 3396 hci_stack->local_name = local_name; 3397 } 3398 3399 3400 #ifdef ENABLE_BLE 3401 3402 void gap_start_scan(void){ 3403 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3404 hci_stack->le_scanning_state = LE_START_SCAN; 3405 hci_run(); 3406 } 3407 3408 void gap_stop_scan(void){ 3409 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3410 hci_stack->le_scanning_state = LE_STOP_SCAN; 3411 hci_run(); 3412 } 3413 3414 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3415 hci_stack->le_scan_type = scan_type; 3416 hci_stack->le_scan_interval = scan_interval; 3417 hci_stack->le_scan_window = scan_window; 3418 hci_run(); 3419 } 3420 3421 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3422 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3423 if (!conn){ 3424 log_info("gap_connect: no connection exists yet, creating context"); 3425 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3426 if (!conn){ 3427 // notify client that alloc failed 3428 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3429 log_info("gap_connect: failed to alloc hci_connection_t"); 3430 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3431 } 3432 conn->state = SEND_CREATE_CONNECTION; 3433 log_info("gap_connect: send create connection next"); 3434 hci_run(); 3435 return 0; 3436 } 3437 3438 if (!hci_is_le_connection(conn) || 3439 conn->state == SEND_CREATE_CONNECTION || 3440 conn->state == SENT_CREATE_CONNECTION) { 3441 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3442 log_error("gap_connect: classic connection or connect is already being created"); 3443 return GATT_CLIENT_IN_WRONG_STATE; 3444 } 3445 3446 log_info("gap_connect: context exists with state %u", conn->state); 3447 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3448 hci_run(); 3449 return 0; 3450 } 3451 3452 // @assumption: only a single outgoing LE Connection exists 3453 static hci_connection_t * gap_get_outgoing_connection(void){ 3454 btstack_linked_item_t *it; 3455 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3456 hci_connection_t * conn = (hci_connection_t *) it; 3457 if (!hci_is_le_connection(conn)) continue; 3458 switch (conn->state){ 3459 case SEND_CREATE_CONNECTION: 3460 case SENT_CREATE_CONNECTION: 3461 return conn; 3462 default: 3463 break; 3464 }; 3465 } 3466 return NULL; 3467 } 3468 3469 uint8_t gap_connect_cancel(void){ 3470 hci_connection_t * conn = gap_get_outgoing_connection(); 3471 if (!conn) return 0; 3472 switch (conn->state){ 3473 case SEND_CREATE_CONNECTION: 3474 // skip sending create connection and emit event instead 3475 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3476 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3477 btstack_memory_hci_connection_free( conn ); 3478 break; 3479 case SENT_CREATE_CONNECTION: 3480 // request to send cancel connection 3481 conn->state = SEND_CANCEL_CONNECTION; 3482 hci_run(); 3483 break; 3484 default: 3485 break; 3486 } 3487 return 0; 3488 } 3489 3490 /** 3491 * @brief Updates the connection parameters for a given LE connection 3492 * @param handle 3493 * @param conn_interval_min (unit: 1.25ms) 3494 * @param conn_interval_max (unit: 1.25ms) 3495 * @param conn_latency 3496 * @param supervision_timeout (unit: 10ms) 3497 * @returns 0 if ok 3498 */ 3499 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3500 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3501 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3502 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3503 connection->le_conn_interval_min = conn_interval_min; 3504 connection->le_conn_interval_max = conn_interval_max; 3505 connection->le_conn_latency = conn_latency; 3506 connection->le_supervision_timeout = supervision_timeout; 3507 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3508 hci_run(); 3509 return 0; 3510 } 3511 3512 /** 3513 * @brief Request an update of the connection parameter for a given LE connection 3514 * @param handle 3515 * @param conn_interval_min (unit: 1.25ms) 3516 * @param conn_interval_max (unit: 1.25ms) 3517 * @param conn_latency 3518 * @param supervision_timeout (unit: 10ms) 3519 * @returns 0 if ok 3520 */ 3521 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3522 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3523 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3524 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3525 connection->le_conn_interval_min = conn_interval_min; 3526 connection->le_conn_interval_max = conn_interval_max; 3527 connection->le_conn_latency = conn_latency; 3528 connection->le_supervision_timeout = supervision_timeout; 3529 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3530 hci_run(); 3531 return 0; 3532 } 3533 3534 static void gap_advertisments_changed(void){ 3535 // disable advertisements before updating adv, scan data, or adv params 3536 if (hci_stack->le_advertisements_active){ 3537 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3538 } 3539 hci_run(); 3540 } 3541 3542 /** 3543 * @brief Set Advertisement Data 3544 * @param advertising_data_length 3545 * @param advertising_data (max 31 octets) 3546 * @note data is not copied, pointer has to stay valid 3547 */ 3548 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3549 hci_stack->le_advertisements_data_len = advertising_data_length; 3550 hci_stack->le_advertisements_data = advertising_data; 3551 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3552 gap_advertisments_changed(); 3553 } 3554 3555 /** 3556 * @brief Set Scan Response Data 3557 * @param advertising_data_length 3558 * @param advertising_data (max 31 octets) 3559 * @note data is not copied, pointer has to stay valid 3560 */ 3561 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3562 hci_stack->le_scan_response_data_len = scan_response_data_length; 3563 hci_stack->le_scan_response_data = scan_response_data; 3564 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3565 gap_advertisments_changed(); 3566 } 3567 3568 /** 3569 * @brief Set Advertisement Parameters 3570 * @param adv_int_min 3571 * @param adv_int_max 3572 * @param adv_type 3573 * @param own_address_type 3574 * @param direct_address_type 3575 * @param direct_address 3576 * @param channel_map 3577 * @param filter_policy 3578 * 3579 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3580 */ 3581 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3582 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3583 uint8_t channel_map, uint8_t filter_policy) { 3584 3585 hci_stack->le_advertisements_interval_min = adv_int_min; 3586 hci_stack->le_advertisements_interval_max = adv_int_max; 3587 hci_stack->le_advertisements_type = adv_type; 3588 hci_stack->le_advertisements_own_address_type = own_address_type; 3589 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3590 hci_stack->le_advertisements_channel_map = channel_map; 3591 hci_stack->le_advertisements_filter_policy = filter_policy; 3592 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3593 3594 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3595 gap_advertisments_changed(); 3596 } 3597 3598 void hci_le_advertisements_set_own_address_type(uint8_t own_address_type){ 3599 hci_stack->le_advertisements_own_address_type = own_address_type; 3600 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3601 gap_advertisments_changed(); 3602 } 3603 3604 /** 3605 * @brief Enable/Disable Advertisements 3606 * @param enabled 3607 */ 3608 void gap_advertisements_enable(int enabled){ 3609 hci_stack->le_advertisements_enabled = enabled; 3610 if (enabled && !hci_stack->le_advertisements_active){ 3611 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3612 } 3613 if (!enabled && hci_stack->le_advertisements_active){ 3614 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3615 } 3616 hci_run(); 3617 } 3618 3619 #endif 3620 3621 uint8_t gap_disconnect(hci_con_handle_t handle){ 3622 hci_connection_t * conn = hci_connection_for_handle(handle); 3623 if (!conn){ 3624 hci_emit_disconnection_complete(handle, 0); 3625 return 0; 3626 } 3627 conn->state = SEND_DISCONNECT; 3628 hci_run(); 3629 return 0; 3630 } 3631 3632 /** 3633 * @brief Get connection type 3634 * @param con_handle 3635 * @result connection_type 3636 */ 3637 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3638 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3639 if (!conn) return GAP_CONNECTION_INVALID; 3640 switch (conn->address_type){ 3641 case BD_ADDR_TYPE_LE_PUBLIC: 3642 case BD_ADDR_TYPE_LE_RANDOM: 3643 return GAP_CONNECTION_LE; 3644 case BD_ADDR_TYPE_SCO: 3645 return GAP_CONNECTION_SCO; 3646 case BD_ADDR_TYPE_CLASSIC: 3647 return GAP_CONNECTION_ACL; 3648 default: 3649 return GAP_CONNECTION_INVALID; 3650 } 3651 } 3652 3653 #ifdef ENABLE_BLE 3654 3655 /** 3656 * @brief Auto Connection Establishment - Start Connecting to device 3657 * @param address_typ 3658 * @param address 3659 * @returns 0 if ok 3660 */ 3661 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3662 // check capacity 3663 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3664 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3665 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3666 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3667 entry->address_type = address_type; 3668 memcpy(entry->address, address, 6); 3669 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3670 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3671 hci_run(); 3672 return 0; 3673 } 3674 3675 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3676 btstack_linked_list_iterator_t it; 3677 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3678 while (btstack_linked_list_iterator_has_next(&it)){ 3679 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3680 if (entry->address_type != address_type) continue; 3681 if (memcmp(entry->address, address, 6) != 0) continue; 3682 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3683 // remove from controller if already present 3684 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3685 continue; 3686 } 3687 // direclty remove entry from whitelist 3688 btstack_linked_list_iterator_remove(&it); 3689 btstack_memory_whitelist_entry_free(entry); 3690 } 3691 } 3692 3693 /** 3694 * @brief Auto Connection Establishment - Stop Connecting to device 3695 * @param address_typ 3696 * @param address 3697 * @returns 0 if ok 3698 */ 3699 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3700 hci_remove_from_whitelist(address_type, address); 3701 hci_run(); 3702 return 0; 3703 } 3704 3705 /** 3706 * @brief Auto Connection Establishment - Stop everything 3707 * @note Convenience function to stop all active auto connection attempts 3708 */ 3709 void gap_auto_connection_stop_all(void){ 3710 btstack_linked_list_iterator_t it; 3711 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3712 while (btstack_linked_list_iterator_has_next(&it)){ 3713 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3714 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3715 // remove from controller if already present 3716 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3717 continue; 3718 } 3719 // directly remove entry from whitelist 3720 btstack_linked_list_iterator_remove(&it); 3721 btstack_memory_whitelist_entry_free(entry); 3722 } 3723 hci_run(); 3724 } 3725 3726 #endif 3727 3728 #ifdef ENABLE_CLASSIC 3729 /** 3730 * @brief Set Extended Inquiry Response data 3731 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3732 * @note has to be done before stack starts up 3733 */ 3734 void gap_set_extended_inquiry_response(const uint8_t * data){ 3735 hci_stack->eir_data = data; 3736 } 3737 3738 /** 3739 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3740 * @param inquriy_mode see bluetooth_defines.h 3741 */ 3742 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3743 hci_stack->inquiry_mode = mode; 3744 } 3745 3746 /** 3747 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3748 */ 3749 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3750 hci_stack->sco_voice_setting = voice_setting; 3751 } 3752 3753 /** 3754 * @brief Get SCO Voice Setting 3755 * @return current voice setting 3756 */ 3757 uint16_t hci_get_sco_voice_setting(void){ 3758 return hci_stack->sco_voice_setting; 3759 } 3760 3761 /** @brief Get SCO packet length for current SCO Voice setting 3762 * @note Using SCO packets of the exact length is required for USB transfer 3763 * @return Length of SCO packets in bytes (not audio frames) 3764 */ 3765 int hci_get_sco_packet_length(void){ 3766 // see Core Spec for H2 USB Transfer. 3767 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3768 return 27; 3769 } 3770 #endif 3771 3772 /** 3773 * @brief Set callback for Bluetooth Hardware Error 3774 */ 3775 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3776 hci_stack->hardware_error_callback = fn; 3777 } 3778 3779 /** 3780 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3781 * @note Can be used to select chipset driver dynamically during startup 3782 */ 3783 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3784 hci_stack->local_version_information_callback = fn; 3785 } 3786 3787 void hci_disconnect_all(void){ 3788 btstack_linked_list_iterator_t it; 3789 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3790 while (btstack_linked_list_iterator_has_next(&it)){ 3791 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3792 if (con->state == SENT_DISCONNECT) continue; 3793 con->state = SEND_DISCONNECT; 3794 } 3795 hci_run(); 3796 } 3797 3798 uint16_t hci_get_manufacturer(void){ 3799 return hci_stack->manufacturer; 3800 } 3801