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_RESET_CSR_WARM_BOOT: 961 hci_state_reset(); 962 // prepare reset if command complete not received in 100ms 963 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 964 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 965 btstack_run_loop_add_timer(&hci_stack->timeout); 966 // send command 967 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 968 hci_send_cmd(&hci_reset); 969 break; 970 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 971 hci_state_reset(); 972 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 973 hci_send_cmd(&hci_reset); 974 break; 975 case HCI_INIT_SEND_BAUD_CHANGE: { 976 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 977 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 978 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 979 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 980 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 981 // STLC25000D: baudrate change happens within 0.5 s after command was send, 982 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 983 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 984 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 985 btstack_run_loop_add_timer(&hci_stack->timeout); 986 } 987 break; 988 } 989 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 990 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 991 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 992 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 993 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 994 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 995 break; 996 } 997 case HCI_INIT_CUSTOM_INIT: 998 // Custom initialization 999 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1000 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1001 if (valid_cmd){ 1002 int size = 3 + hci_stack->hci_packet_buffer[2]; 1003 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1004 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1005 switch (valid_cmd) { 1006 case 1: 1007 default: 1008 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1009 break; 1010 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1011 log_info("CSR Warm Boot"); 1012 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1013 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1014 btstack_run_loop_add_timer(&hci_stack->timeout); 1015 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1016 && hci_stack->config 1017 && hci_stack->chipset 1018 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1019 && hci_stack->hci_transport->set_baudrate 1020 && hci_transport_uart_get_main_baud_rate()){ 1021 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1022 } else { 1023 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1024 } 1025 break; 1026 } 1027 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1028 break; 1029 } 1030 log_info("Init script done"); 1031 1032 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1033 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1034 int need_baud_change = hci_stack->config 1035 && hci_stack->chipset 1036 && hci_stack->chipset->set_baudrate_command 1037 && hci_stack->hci_transport->set_baudrate 1038 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1039 if (need_baud_change) { 1040 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1041 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1042 hci_stack->hci_transport->set_baudrate(baud_rate); 1043 } 1044 } 1045 } 1046 // otherwise continue 1047 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1048 hci_send_cmd(&hci_read_local_supported_commands); 1049 break; 1050 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1051 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1052 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1053 hci_send_cmd(&hci_read_local_supported_commands); 1054 break; 1055 case HCI_INIT_SET_BD_ADDR: 1056 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1057 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1058 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1059 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1060 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1061 break; 1062 case HCI_INIT_READ_BD_ADDR: 1063 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1064 hci_send_cmd(&hci_read_bd_addr); 1065 break; 1066 case HCI_INIT_READ_BUFFER_SIZE: 1067 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1068 hci_send_cmd(&hci_read_buffer_size); 1069 break; 1070 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1071 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1072 hci_send_cmd(&hci_read_local_supported_features); 1073 break; 1074 case HCI_INIT_SET_EVENT_MASK: 1075 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1076 if (hci_le_supported()){ 1077 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1078 } else { 1079 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1080 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1081 } 1082 break; 1083 #ifdef ENABLE_CLASSIC 1084 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1085 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1086 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1087 break; 1088 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1089 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1090 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1091 break; 1092 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1093 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1094 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1095 break; 1096 case HCI_INIT_WRITE_LOCAL_NAME: 1097 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1098 if (hci_stack->local_name){ 1099 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1100 } else { 1101 char local_name[8+17+1]; 1102 // BTstack 11:22:33:44:55:66 1103 memcpy(local_name, "BTstack ", 8); 1104 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1105 local_name[8+17] = '\0'; 1106 log_info("---> Name %s", local_name); 1107 hci_send_cmd(&hci_write_local_name, local_name); 1108 } 1109 break; 1110 case HCI_INIT_WRITE_EIR_DATA: 1111 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1112 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1113 break; 1114 case HCI_INIT_WRITE_INQUIRY_MODE: 1115 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1116 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1117 break; 1118 case HCI_INIT_WRITE_SCAN_ENABLE: 1119 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1120 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1121 break; 1122 // only sent if ENABLE_SCO_OVER_HCI is defined 1123 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1124 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1125 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1126 break; 1127 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1128 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1129 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1130 break; 1131 #endif 1132 #ifdef ENABLE_BLE 1133 // LE INIT 1134 case HCI_INIT_LE_READ_BUFFER_SIZE: 1135 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1136 hci_send_cmd(&hci_le_read_buffer_size); 1137 break; 1138 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1139 // LE Supported Host = 1, Simultaneous Host = 0 1140 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1141 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1142 break; 1143 case HCI_INIT_READ_WHITE_LIST_SIZE: 1144 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1145 hci_send_cmd(&hci_le_read_white_list_size); 1146 break; 1147 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1148 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1149 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1150 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1151 break; 1152 #endif 1153 default: 1154 return; 1155 } 1156 } 1157 1158 static void hci_init_done(void){ 1159 // done. tell the app 1160 log_info("hci_init_done -> HCI_STATE_WORKING"); 1161 hci_stack->state = HCI_STATE_WORKING; 1162 hci_emit_state(); 1163 hci_run(); 1164 } 1165 1166 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1167 uint8_t command_completed = 0; 1168 1169 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1170 uint16_t opcode = little_endian_read_16(packet,3); 1171 if (opcode == hci_stack->last_cmd_opcode){ 1172 command_completed = 1; 1173 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1174 } else { 1175 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1176 } 1177 } 1178 1179 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1180 uint8_t status = packet[2]; 1181 uint16_t opcode = little_endian_read_16(packet,4); 1182 if (opcode == hci_stack->last_cmd_opcode){ 1183 if (status){ 1184 command_completed = 1; 1185 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1186 } else { 1187 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1188 } 1189 } else { 1190 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1191 } 1192 } 1193 1194 // Vendor == CSR 1195 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1196 // TODO: track actual command 1197 command_completed = 1; 1198 } 1199 1200 // Vendor == Toshiba 1201 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1202 // TODO: track actual command 1203 command_completed = 1; 1204 } 1205 1206 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1207 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1208 // 1209 // HCI Reset 1210 // Timeout 100 ms 1211 // HCI Reset 1212 // Command Complete Reset 1213 // HCI Read Local Version Information 1214 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1215 // hang... 1216 // 1217 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1218 if (!command_completed 1219 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1220 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1221 1222 uint16_t opcode = little_endian_read_16(packet,3); 1223 if (opcode == hci_reset.opcode){ 1224 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1225 return; 1226 } 1227 } 1228 1229 // CSR & H5 1230 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1231 if (!command_completed 1232 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1233 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1234 1235 uint16_t opcode = little_endian_read_16(packet,3); 1236 if (opcode == hci_reset.opcode){ 1237 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1238 return; 1239 } 1240 } 1241 1242 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1243 // fix: Correct substate and behave as command below 1244 if (command_completed){ 1245 switch (hci_stack->substate){ 1246 case HCI_INIT_SEND_RESET: 1247 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1248 break; 1249 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1250 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1251 break; 1252 default: 1253 break; 1254 } 1255 } 1256 1257 1258 if (!command_completed) return; 1259 1260 int need_baud_change = hci_stack->config 1261 && hci_stack->chipset 1262 && hci_stack->chipset->set_baudrate_command 1263 && hci_stack->hci_transport->set_baudrate 1264 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1265 1266 int need_addr_change = hci_stack->custom_bd_addr_set 1267 && hci_stack->chipset 1268 && hci_stack->chipset->set_bd_addr_command; 1269 1270 switch(hci_stack->substate){ 1271 case HCI_INIT_SEND_RESET: 1272 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1273 // fix: just correct substate and behave as command below 1274 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1275 btstack_run_loop_remove_timer(&hci_stack->timeout); 1276 break; 1277 case HCI_INIT_W4_SEND_RESET: 1278 btstack_run_loop_remove_timer(&hci_stack->timeout); 1279 break; 1280 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1281 log_info("Received local version info, need baud change %d", need_baud_change); 1282 if (need_baud_change){ 1283 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1284 return; 1285 } 1286 // skip baud change 1287 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1288 return; 1289 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1290 // for STLC2500D, baud rate change already happened. 1291 // for others, baud rate gets changed now 1292 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1293 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1294 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1295 hci_stack->hci_transport->set_baudrate(baud_rate); 1296 } 1297 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1298 return; 1299 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1300 btstack_run_loop_remove_timer(&hci_stack->timeout); 1301 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1302 return; 1303 case HCI_INIT_W4_CUSTOM_INIT: 1304 // repeat custom init 1305 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1306 return; 1307 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1308 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1309 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1310 return; 1311 } 1312 if (need_addr_change){ 1313 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1314 return; 1315 } 1316 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1317 return; 1318 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1319 if (need_baud_change){ 1320 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1321 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1322 hci_stack->hci_transport->set_baudrate(baud_rate); 1323 } 1324 if (need_addr_change){ 1325 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1326 return; 1327 } 1328 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1329 return; 1330 case HCI_INIT_W4_SET_BD_ADDR: 1331 // for STLC2500D, bd addr change only gets active after sending reset command 1332 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1333 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1334 return; 1335 } 1336 // skipping st warm boot 1337 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1338 return; 1339 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1340 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1341 return; 1342 case HCI_INIT_W4_READ_BD_ADDR: 1343 // only read buffer size if supported 1344 if (hci_stack->local_supported_commands[0] & 0x01) { 1345 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1346 return; 1347 } 1348 // skipping read buffer size 1349 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1350 return; 1351 case HCI_INIT_W4_SET_EVENT_MASK: 1352 // skip Classic init commands for LE only chipsets 1353 if (!hci_classic_supported()){ 1354 if (hci_le_supported()){ 1355 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1356 return; 1357 } else { 1358 log_error("Neither BR/EDR nor LE supported"); 1359 hci_init_done(); 1360 return; 1361 } 1362 } 1363 if (!gap_ssp_supported()){ 1364 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1365 return; 1366 } 1367 break; 1368 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1369 // skip write le host if not supported (e.g. on LE only EM9301) 1370 if (hci_stack->local_supported_commands[0] & 0x02) break; 1371 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1372 return; 1373 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1374 // skip write eir data if no eir data set 1375 if (hci_stack->eir_data) break; 1376 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1377 return; 1378 1379 #ifdef ENABLE_SCO_OVER_HCI 1380 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1381 // skip write synchronous flow control if not supported 1382 if (hci_stack->local_supported_commands[0] & 0x04) break; 1383 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1384 // explicit fall through to reduce repetitions 1385 1386 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1387 // skip write default erroneous data reporting if not supported 1388 if (hci_stack->local_supported_commands[0] & 0x08) break; 1389 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1390 // explicit fall through to reduce repetitions 1391 1392 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1393 if (!hci_le_supported()){ 1394 // SKIP LE init for Classic only configuration 1395 hci_init_done(); 1396 return; 1397 } 1398 break; 1399 #else 1400 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1401 if (!hci_le_supported()){ 1402 // SKIP LE init for Classic only configuration 1403 hci_init_done(); 1404 return; 1405 } 1406 #endif 1407 break; 1408 // Response to command before init done state -> init done 1409 case (HCI_INIT_DONE-1): 1410 hci_init_done(); 1411 return; 1412 1413 default: 1414 break; 1415 } 1416 hci_initializing_next_state(); 1417 } 1418 1419 static void event_handler(uint8_t *packet, int size){ 1420 1421 uint16_t event_length = packet[1]; 1422 1423 // assert packet is complete 1424 if (size != event_length + 2){ 1425 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1426 return; 1427 } 1428 1429 bd_addr_t addr; 1430 bd_addr_type_t addr_type; 1431 uint8_t link_type; 1432 hci_con_handle_t handle; 1433 hci_connection_t * conn; 1434 int i; 1435 1436 // warnings 1437 (void) link_type; 1438 1439 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1440 1441 switch (hci_event_packet_get_type(packet)) { 1442 1443 case HCI_EVENT_COMMAND_COMPLETE: 1444 // get num cmd packets 1445 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1446 hci_stack->num_cmd_packets = packet[2]; 1447 1448 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1449 // from offset 5 1450 // status 1451 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1452 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1453 hci_stack->sco_data_packet_length = packet[8]; 1454 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1455 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1456 1457 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1458 // determine usable ACL payload size 1459 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1460 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1461 } 1462 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1463 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1464 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1465 } 1466 } 1467 #ifdef ENABLE_BLE 1468 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1469 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1470 hci_stack->le_acl_packets_total_num = packet[8]; 1471 // determine usable ACL payload size 1472 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1473 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1474 } 1475 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1476 } 1477 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1478 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1479 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1480 } 1481 #endif 1482 // Dump local address 1483 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1484 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1485 hci_stack->local_bd_addr); 1486 log_info("Local Address, Status: 0x%02x: Addr: %s", 1487 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1488 if (hci_stack->link_key_db){ 1489 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1490 } 1491 } 1492 #ifdef ENABLE_CLASSIC 1493 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1494 hci_emit_discoverable_enabled(hci_stack->discoverable); 1495 } 1496 #endif 1497 1498 // Note: HCI init checks 1499 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1500 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1501 1502 #ifdef ENABLE_CLASSIC 1503 // determine usable ACL packet types based on host buffer size and supported features 1504 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1505 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1506 #endif 1507 // Classic/LE 1508 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1509 } 1510 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1511 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1512 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1513 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1514 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1515 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1516 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1517 // notify app 1518 if (hci_stack->local_version_information_callback){ 1519 hci_stack->local_version_information_callback(packet); 1520 } 1521 } 1522 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1523 hci_stack->local_supported_commands[0] = 1524 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1525 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1526 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1527 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1528 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1529 } 1530 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1531 if (packet[5] == 0){ 1532 hci_stack->synchronous_flow_control_enabled = 1; 1533 } 1534 } 1535 break; 1536 1537 case HCI_EVENT_COMMAND_STATUS: 1538 // get num cmd packets 1539 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1540 hci_stack->num_cmd_packets = packet[3]; 1541 break; 1542 1543 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1544 int offset = 3; 1545 for (i=0; i<packet[2];i++){ 1546 handle = little_endian_read_16(packet, offset); 1547 offset += 2; 1548 uint16_t num_packets = little_endian_read_16(packet, offset); 1549 offset += 2; 1550 1551 conn = hci_connection_for_handle(handle); 1552 if (!conn){ 1553 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1554 continue; 1555 } 1556 1557 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1558 #ifdef ENABLE_CLASSIC 1559 if (conn->num_sco_packets_sent >= num_packets){ 1560 conn->num_sco_packets_sent -= num_packets; 1561 } else { 1562 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1563 conn->num_sco_packets_sent = 0; 1564 } 1565 hci_notify_if_sco_can_send_now(); 1566 #endif 1567 } else { 1568 if (conn->num_acl_packets_sent >= num_packets){ 1569 conn->num_acl_packets_sent -= num_packets; 1570 } else { 1571 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1572 conn->num_acl_packets_sent = 0; 1573 } 1574 } 1575 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1576 } 1577 break; 1578 } 1579 1580 #ifdef ENABLE_CLASSIC 1581 case HCI_EVENT_CONNECTION_REQUEST: 1582 reverse_bd_addr(&packet[2], addr); 1583 // TODO: eval COD 8-10 1584 link_type = packet[11]; 1585 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1586 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1587 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1588 if (!conn) { 1589 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1590 } 1591 if (!conn) { 1592 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1593 hci_stack->decline_reason = 0x0d; 1594 bd_addr_copy(hci_stack->decline_addr, addr); 1595 break; 1596 } 1597 conn->role = HCI_ROLE_SLAVE; 1598 conn->state = RECEIVED_CONNECTION_REQUEST; 1599 // store info about eSCO 1600 if (link_type == 0x02){ 1601 conn->remote_supported_feature_eSCO = 1; 1602 } 1603 hci_run(); 1604 break; 1605 1606 case HCI_EVENT_CONNECTION_COMPLETE: 1607 // Connection management 1608 reverse_bd_addr(&packet[5], addr); 1609 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1610 addr_type = BD_ADDR_TYPE_CLASSIC; 1611 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1612 if (conn) { 1613 if (!packet[2]){ 1614 conn->state = OPEN; 1615 conn->con_handle = little_endian_read_16(packet, 3); 1616 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1617 1618 // restart timer 1619 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1620 btstack_run_loop_add_timer(&conn->timeout); 1621 1622 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1623 1624 hci_emit_nr_connections_changed(); 1625 } else { 1626 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1627 uint8_t status = packet[2]; 1628 bd_addr_t bd_address; 1629 memcpy(&bd_address, conn->address, 6); 1630 1631 // connection failed, remove entry 1632 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1633 btstack_memory_hci_connection_free( conn ); 1634 1635 // notify client if dedicated bonding 1636 if (notify_dedicated_bonding_failed){ 1637 log_info("hci notify_dedicated_bonding_failed"); 1638 hci_emit_dedicated_bonding_result(bd_address, status); 1639 } 1640 1641 // if authentication error, also delete link key 1642 if (packet[2] == 0x05) { 1643 gap_drop_link_key_for_bd_addr(addr); 1644 } 1645 } 1646 } 1647 break; 1648 1649 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1650 reverse_bd_addr(&packet[5], addr); 1651 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1652 if (packet[2]){ 1653 // connection failed 1654 break; 1655 } 1656 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1657 if (!conn) { 1658 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1659 } 1660 if (!conn) { 1661 break; 1662 } 1663 conn->state = OPEN; 1664 conn->con_handle = little_endian_read_16(packet, 3); 1665 break; 1666 1667 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1668 handle = little_endian_read_16(packet, 3); 1669 conn = hci_connection_for_handle(handle); 1670 if (!conn) break; 1671 if (!packet[2]){ 1672 uint8_t * features = &packet[5]; 1673 if (features[6] & (1 << 3)){ 1674 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1675 } 1676 if (features[3] & (1<<7)){ 1677 conn->remote_supported_feature_eSCO = 1; 1678 } 1679 } 1680 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1681 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1682 if (conn->bonding_flags & BONDING_DEDICATED){ 1683 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1684 } 1685 break; 1686 1687 case HCI_EVENT_LINK_KEY_REQUEST: 1688 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1689 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1690 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1691 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1692 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1693 hci_run(); 1694 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1695 return; 1696 1697 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1698 reverse_bd_addr(&packet[2], addr); 1699 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1700 if (!conn) break; 1701 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1702 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1703 // Change Connection Encryption keeps link key type 1704 if (link_key_type != CHANGED_COMBINATION_KEY){ 1705 conn->link_key_type = link_key_type; 1706 } 1707 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1708 // still forward event to allow dismiss of pairing dialog 1709 break; 1710 } 1711 1712 case HCI_EVENT_PIN_CODE_REQUEST: 1713 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1714 // non-bondable mode: pin code negative reply will be sent 1715 if (!hci_stack->bondable){ 1716 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1717 hci_run(); 1718 return; 1719 } 1720 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1721 if (!hci_stack->link_key_db) break; 1722 hci_event_pin_code_request_get_bd_addr(packet, addr); 1723 hci_stack->link_key_db->delete_link_key(addr); 1724 break; 1725 1726 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1727 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1728 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1729 break; 1730 1731 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1732 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1733 if (!hci_stack->ssp_auto_accept) break; 1734 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1735 break; 1736 1737 case HCI_EVENT_USER_PASSKEY_REQUEST: 1738 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1739 if (!hci_stack->ssp_auto_accept) break; 1740 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1741 break; 1742 #endif 1743 1744 case HCI_EVENT_ENCRYPTION_CHANGE: 1745 handle = little_endian_read_16(packet, 3); 1746 conn = hci_connection_for_handle(handle); 1747 if (!conn) break; 1748 if (packet[2] == 0) { 1749 if (packet[5]){ 1750 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1751 } else { 1752 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1753 } 1754 } 1755 #ifdef ENABLE_CLASSIC 1756 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1757 #endif 1758 break; 1759 1760 #ifdef ENABLE_CLASSIC 1761 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1762 handle = little_endian_read_16(packet, 3); 1763 conn = hci_connection_for_handle(handle); 1764 if (!conn) break; 1765 1766 // dedicated bonding: send result and disconnect 1767 if (conn->bonding_flags & BONDING_DEDICATED){ 1768 conn->bonding_flags &= ~BONDING_DEDICATED; 1769 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1770 conn->bonding_status = packet[2]; 1771 break; 1772 } 1773 1774 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1775 // link key sufficient for requested security 1776 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1777 break; 1778 } 1779 // not enough 1780 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1781 break; 1782 #endif 1783 1784 // HCI_EVENT_DISCONNECTION_COMPLETE 1785 // has been split, to first notify stack before shutting connection down 1786 // see end of function, too. 1787 case HCI_EVENT_DISCONNECTION_COMPLETE: 1788 if (packet[2]) break; // status != 0 1789 handle = little_endian_read_16(packet, 3); 1790 // drop outgoing ACL fragments if it is for closed connection 1791 if (hci_stack->acl_fragmentation_total_size > 0) { 1792 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1793 log_info("hci: drop fragmented ACL data for closed connection"); 1794 hci_stack->acl_fragmentation_total_size = 0; 1795 hci_stack->acl_fragmentation_pos = 0; 1796 } 1797 } 1798 1799 // re-enable advertisements for le connections if active 1800 conn = hci_connection_for_handle(handle); 1801 if (!conn) break; 1802 #ifdef ENABLE_BLE 1803 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1804 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1805 } 1806 #endif 1807 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1808 break; 1809 1810 case HCI_EVENT_HARDWARE_ERROR: 1811 log_error("Hardware Error: 0x%02x", packet[2]); 1812 if (hci_stack->hardware_error_callback){ 1813 (*hci_stack->hardware_error_callback)(packet[2]); 1814 } else { 1815 // if no special requests, just reboot stack 1816 hci_power_control_off(); 1817 hci_power_control_on(); 1818 } 1819 break; 1820 1821 case HCI_EVENT_ROLE_CHANGE: 1822 if (packet[2]) break; // status != 0 1823 handle = little_endian_read_16(packet, 3); 1824 conn = hci_connection_for_handle(handle); 1825 if (!conn) break; // no conn 1826 conn->role = packet[9]; 1827 break; 1828 1829 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1830 // release packet buffer only for asynchronous transport and if there are not further fragements 1831 if (hci_transport_synchronous()) { 1832 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1833 return; // instead of break: to avoid re-entering hci_run() 1834 } 1835 if (hci_stack->acl_fragmentation_total_size) break; 1836 hci_release_packet_buffer(); 1837 1838 // L2CAP receives this event via the hci_emit_event below 1839 1840 #ifdef ENABLE_CLASSIC 1841 // For SCO, we do the can_send_now_check here 1842 hci_notify_if_sco_can_send_now(); 1843 #endif 1844 break; 1845 1846 #ifdef ENABLE_CLASSIC 1847 case HCI_EVENT_SCO_CAN_SEND_NOW: 1848 // For SCO, we do the can_send_now_check here 1849 hci_notify_if_sco_can_send_now(); 1850 return; 1851 #endif 1852 1853 #ifdef ENABLE_BLE 1854 case HCI_EVENT_LE_META: 1855 switch (packet[2]){ 1856 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1857 // log_info("advertising report received"); 1858 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1859 le_handle_advertisement_report(packet, size); 1860 break; 1861 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1862 // Connection management 1863 reverse_bd_addr(&packet[8], addr); 1864 addr_type = (bd_addr_type_t)packet[7]; 1865 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1866 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1867 // if auto-connect, remove from whitelist in both roles 1868 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1869 hci_remove_from_whitelist(addr_type, addr); 1870 } 1871 // handle error: error is reported only to the initiator -> outgoing connection 1872 if (packet[3]){ 1873 // outgoing connection establishment is done 1874 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1875 // remove entry 1876 if (conn){ 1877 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1878 btstack_memory_hci_connection_free( conn ); 1879 } 1880 break; 1881 } 1882 // on success, both hosts receive connection complete event 1883 if (packet[6] == HCI_ROLE_MASTER){ 1884 // if we're master, it was an outgoing connection and we're done with it 1885 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1886 } else { 1887 // if we're slave, it was an incoming connection, advertisements have stopped 1888 hci_stack->le_advertisements_active = 0; 1889 } 1890 // LE connections are auto-accepted, so just create a connection if there isn't one already 1891 if (!conn){ 1892 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1893 } 1894 // no memory, sorry. 1895 if (!conn){ 1896 break; 1897 } 1898 1899 conn->state = OPEN; 1900 conn->role = packet[6]; 1901 conn->con_handle = little_endian_read_16(packet, 4); 1902 1903 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1904 1905 // restart timer 1906 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1907 // btstack_run_loop_add_timer(&conn->timeout); 1908 1909 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1910 1911 hci_emit_nr_connections_changed(); 1912 break; 1913 1914 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1915 1916 default: 1917 break; 1918 } 1919 break; 1920 #endif 1921 default: 1922 break; 1923 } 1924 1925 // handle BT initialization 1926 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1927 hci_initializing_event_handler(packet, size); 1928 } 1929 1930 // help with BT sleep 1931 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1932 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1933 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1934 hci_initializing_next_state(); 1935 } 1936 1937 // notify upper stack 1938 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1939 1940 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1941 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1942 if (!packet[2]){ 1943 handle = little_endian_read_16(packet, 3); 1944 hci_connection_t * aConn = hci_connection_for_handle(handle); 1945 if (aConn) { 1946 uint8_t status = aConn->bonding_status; 1947 uint16_t flags = aConn->bonding_flags; 1948 bd_addr_t bd_address; 1949 memcpy(&bd_address, aConn->address, 6); 1950 hci_shutdown_connection(aConn); 1951 // connection struct is gone, don't access anymore 1952 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1953 hci_emit_dedicated_bonding_result(bd_address, status); 1954 } 1955 } 1956 } 1957 } 1958 1959 // execute main loop 1960 hci_run(); 1961 } 1962 1963 #ifdef ENABLE_CLASSIC 1964 static void sco_handler(uint8_t * packet, uint16_t size){ 1965 if (!hci_stack->sco_packet_handler) return; 1966 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1967 } 1968 #endif 1969 1970 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1971 hci_dump_packet(packet_type, 1, packet, size); 1972 switch (packet_type) { 1973 case HCI_EVENT_PACKET: 1974 event_handler(packet, size); 1975 break; 1976 case HCI_ACL_DATA_PACKET: 1977 acl_handler(packet, size); 1978 break; 1979 #ifdef ENABLE_CLASSIC 1980 case HCI_SCO_DATA_PACKET: 1981 sco_handler(packet, size); 1982 break; 1983 #endif 1984 default: 1985 break; 1986 } 1987 } 1988 1989 /** 1990 * @brief Add event packet handler. 1991 */ 1992 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1993 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1994 } 1995 1996 1997 /** Register HCI packet handlers */ 1998 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 1999 hci_stack->acl_packet_handler = handler; 2000 } 2001 2002 #ifdef ENABLE_CLASSIC 2003 /** 2004 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2005 */ 2006 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2007 hci_stack->sco_packet_handler = handler; 2008 } 2009 #endif 2010 2011 static void hci_state_reset(void){ 2012 // no connections yet 2013 hci_stack->connections = NULL; 2014 2015 // keep discoverable/connectable as this has been requested by the client(s) 2016 // hci_stack->discoverable = 0; 2017 // hci_stack->connectable = 0; 2018 // hci_stack->bondable = 1; 2019 2020 // buffer is free 2021 hci_stack->hci_packet_buffer_reserved = 0; 2022 2023 // no pending cmds 2024 hci_stack->decline_reason = 0; 2025 hci_stack->new_scan_enable_value = 0xff; 2026 2027 // LE 2028 hci_stack->adv_addr_type = 0; 2029 memset(hci_stack->adv_address, 0, 6); 2030 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2031 hci_stack->le_scan_type = 0xff; 2032 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2033 hci_stack->le_whitelist = 0; 2034 hci_stack->le_whitelist_capacity = 0; 2035 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2036 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2037 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2038 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2039 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2040 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2041 } 2042 2043 #ifdef ENABLE_CLASSIC 2044 /** 2045 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2046 */ 2047 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2048 // store and open remote device db 2049 hci_stack->link_key_db = link_key_db; 2050 if (hci_stack->link_key_db) { 2051 hci_stack->link_key_db->open(); 2052 } 2053 } 2054 #endif 2055 2056 void hci_init(const hci_transport_t *transport, const void *config){ 2057 2058 #ifdef HAVE_MALLOC 2059 if (!hci_stack) { 2060 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2061 } 2062 #else 2063 hci_stack = &hci_stack_static; 2064 #endif 2065 memset(hci_stack, 0, sizeof(hci_stack_t)); 2066 2067 // reference to use transport layer implementation 2068 hci_stack->hci_transport = transport; 2069 2070 // reference to used config 2071 hci_stack->config = config; 2072 2073 // setup pointer for outgoing packet buffer 2074 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2075 2076 // max acl payload size defined in config.h 2077 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2078 2079 // register packet handlers with transport 2080 transport->register_packet_handler(&packet_handler); 2081 2082 hci_stack->state = HCI_STATE_OFF; 2083 2084 // class of device 2085 hci_stack->class_of_device = 0x007a020c; // Smartphone 2086 2087 // bondable by default 2088 hci_stack->bondable = 1; 2089 2090 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2091 hci_stack->ssp_enable = 1; 2092 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2093 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2094 hci_stack->ssp_auto_accept = 1; 2095 2096 // voice setting - signed 8 bit pcm data with CVSD over the air 2097 hci_stack->sco_voice_setting = 0x40; 2098 2099 hci_state_reset(); 2100 } 2101 2102 /** 2103 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2104 */ 2105 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2106 hci_stack->chipset = chipset_driver; 2107 2108 // reset chipset driver - init is also called on power_up 2109 if (hci_stack->chipset && hci_stack->chipset->init){ 2110 hci_stack->chipset->init(hci_stack->config); 2111 } 2112 } 2113 2114 /** 2115 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2116 */ 2117 void hci_set_control(const btstack_control_t *hardware_control){ 2118 // references to used control implementation 2119 hci_stack->control = hardware_control; 2120 // init with transport config 2121 hardware_control->init(hci_stack->config); 2122 } 2123 2124 void hci_close(void){ 2125 // close remote device db 2126 if (hci_stack->link_key_db) { 2127 hci_stack->link_key_db->close(); 2128 } 2129 2130 btstack_linked_list_iterator_t lit; 2131 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2132 while (btstack_linked_list_iterator_has_next(&lit)){ 2133 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2134 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2135 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2136 hci_shutdown_connection(connection); 2137 } 2138 2139 hci_power_control(HCI_POWER_OFF); 2140 2141 #ifdef HAVE_MALLOC 2142 free(hci_stack); 2143 #endif 2144 hci_stack = NULL; 2145 } 2146 2147 #ifdef ENABLE_CLASSIC 2148 void gap_set_class_of_device(uint32_t class_of_device){ 2149 hci_stack->class_of_device = class_of_device; 2150 } 2151 #endif 2152 2153 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2154 void hci_set_bd_addr(bd_addr_t addr){ 2155 memcpy(hci_stack->custom_bd_addr, addr, 6); 2156 hci_stack->custom_bd_addr_set = 1; 2157 } 2158 2159 void hci_disable_l2cap_timeout_check(void){ 2160 disable_l2cap_timeouts = 1; 2161 } 2162 // State-Module-Driver overview 2163 // state module low-level 2164 // HCI_STATE_OFF off close 2165 // HCI_STATE_INITIALIZING, on open 2166 // HCI_STATE_WORKING, on open 2167 // HCI_STATE_HALTING, on open 2168 // HCI_STATE_SLEEPING, off/sleep close 2169 // HCI_STATE_FALLING_ASLEEP on open 2170 2171 static int hci_power_control_on(void){ 2172 2173 // power on 2174 int err = 0; 2175 if (hci_stack->control && hci_stack->control->on){ 2176 err = (*hci_stack->control->on)(); 2177 } 2178 if (err){ 2179 log_error( "POWER_ON failed"); 2180 hci_emit_hci_open_failed(); 2181 return err; 2182 } 2183 2184 // int chipset driver 2185 if (hci_stack->chipset && hci_stack->chipset->init){ 2186 hci_stack->chipset->init(hci_stack->config); 2187 } 2188 2189 // init transport 2190 if (hci_stack->hci_transport->init){ 2191 hci_stack->hci_transport->init(hci_stack->config); 2192 } 2193 2194 // open transport 2195 err = hci_stack->hci_transport->open(); 2196 if (err){ 2197 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2198 if (hci_stack->control && hci_stack->control->off){ 2199 (*hci_stack->control->off)(); 2200 } 2201 hci_emit_hci_open_failed(); 2202 return err; 2203 } 2204 return 0; 2205 } 2206 2207 static void hci_power_control_off(void){ 2208 2209 log_info("hci_power_control_off"); 2210 2211 // close low-level device 2212 hci_stack->hci_transport->close(); 2213 2214 log_info("hci_power_control_off - hci_transport closed"); 2215 2216 // power off 2217 if (hci_stack->control && hci_stack->control->off){ 2218 (*hci_stack->control->off)(); 2219 } 2220 2221 log_info("hci_power_control_off - control closed"); 2222 2223 hci_stack->state = HCI_STATE_OFF; 2224 } 2225 2226 static void hci_power_control_sleep(void){ 2227 2228 log_info("hci_power_control_sleep"); 2229 2230 #if 0 2231 // don't close serial port during sleep 2232 2233 // close low-level device 2234 hci_stack->hci_transport->close(hci_stack->config); 2235 #endif 2236 2237 // sleep mode 2238 if (hci_stack->control && hci_stack->control->sleep){ 2239 (*hci_stack->control->sleep)(); 2240 } 2241 2242 hci_stack->state = HCI_STATE_SLEEPING; 2243 } 2244 2245 static int hci_power_control_wake(void){ 2246 2247 log_info("hci_power_control_wake"); 2248 2249 // wake on 2250 if (hci_stack->control && hci_stack->control->wake){ 2251 (*hci_stack->control->wake)(); 2252 } 2253 2254 #if 0 2255 // open low-level device 2256 int err = hci_stack->hci_transport->open(hci_stack->config); 2257 if (err){ 2258 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2259 if (hci_stack->control && hci_stack->control->off){ 2260 (*hci_stack->control->off)(); 2261 } 2262 hci_emit_hci_open_failed(); 2263 return err; 2264 } 2265 #endif 2266 2267 return 0; 2268 } 2269 2270 static void hci_power_transition_to_initializing(void){ 2271 // set up state machine 2272 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2273 hci_stack->hci_packet_buffer_reserved = 0; 2274 hci_stack->state = HCI_STATE_INITIALIZING; 2275 hci_stack->substate = HCI_INIT_SEND_RESET; 2276 } 2277 2278 int hci_power_control(HCI_POWER_MODE power_mode){ 2279 2280 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2281 2282 int err = 0; 2283 switch (hci_stack->state){ 2284 2285 case HCI_STATE_OFF: 2286 switch (power_mode){ 2287 case HCI_POWER_ON: 2288 err = hci_power_control_on(); 2289 if (err) { 2290 log_error("hci_power_control_on() error %d", err); 2291 return err; 2292 } 2293 hci_power_transition_to_initializing(); 2294 break; 2295 case HCI_POWER_OFF: 2296 // do nothing 2297 break; 2298 case HCI_POWER_SLEEP: 2299 // do nothing (with SLEEP == OFF) 2300 break; 2301 } 2302 break; 2303 2304 case HCI_STATE_INITIALIZING: 2305 switch (power_mode){ 2306 case HCI_POWER_ON: 2307 // do nothing 2308 break; 2309 case HCI_POWER_OFF: 2310 // no connections yet, just turn it off 2311 hci_power_control_off(); 2312 break; 2313 case HCI_POWER_SLEEP: 2314 // no connections yet, just turn it off 2315 hci_power_control_sleep(); 2316 break; 2317 } 2318 break; 2319 2320 case HCI_STATE_WORKING: 2321 switch (power_mode){ 2322 case HCI_POWER_ON: 2323 // do nothing 2324 break; 2325 case HCI_POWER_OFF: 2326 // see hci_run 2327 hci_stack->state = HCI_STATE_HALTING; 2328 break; 2329 case HCI_POWER_SLEEP: 2330 // see hci_run 2331 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2332 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2333 break; 2334 } 2335 break; 2336 2337 case HCI_STATE_HALTING: 2338 switch (power_mode){ 2339 case HCI_POWER_ON: 2340 hci_power_transition_to_initializing(); 2341 break; 2342 case HCI_POWER_OFF: 2343 // do nothing 2344 break; 2345 case HCI_POWER_SLEEP: 2346 // see hci_run 2347 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2348 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2349 break; 2350 } 2351 break; 2352 2353 case HCI_STATE_FALLING_ASLEEP: 2354 switch (power_mode){ 2355 case HCI_POWER_ON: 2356 2357 #ifdef HAVE_PLATFORM_IPHONE_OS 2358 // nothing to do, if H4 supports power management 2359 if (btstack_control_iphone_power_management_enabled()){ 2360 hci_stack->state = HCI_STATE_INITIALIZING; 2361 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2362 break; 2363 } 2364 #endif 2365 hci_power_transition_to_initializing(); 2366 break; 2367 case HCI_POWER_OFF: 2368 // see hci_run 2369 hci_stack->state = HCI_STATE_HALTING; 2370 break; 2371 case HCI_POWER_SLEEP: 2372 // do nothing 2373 break; 2374 } 2375 break; 2376 2377 case HCI_STATE_SLEEPING: 2378 switch (power_mode){ 2379 case HCI_POWER_ON: 2380 2381 #ifdef HAVE_PLATFORM_IPHONE_OS 2382 // nothing to do, if H4 supports power management 2383 if (btstack_control_iphone_power_management_enabled()){ 2384 hci_stack->state = HCI_STATE_INITIALIZING; 2385 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2386 hci_update_scan_enable(); 2387 break; 2388 } 2389 #endif 2390 err = hci_power_control_wake(); 2391 if (err) return err; 2392 hci_power_transition_to_initializing(); 2393 break; 2394 case HCI_POWER_OFF: 2395 hci_stack->state = HCI_STATE_HALTING; 2396 break; 2397 case HCI_POWER_SLEEP: 2398 // do nothing 2399 break; 2400 } 2401 break; 2402 } 2403 2404 // create internal event 2405 hci_emit_state(); 2406 2407 // trigger next/first action 2408 hci_run(); 2409 2410 return 0; 2411 } 2412 2413 2414 #ifdef ENABLE_CLASSIC 2415 2416 static void hci_update_scan_enable(void){ 2417 // 2 = page scan, 1 = inq scan 2418 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2419 hci_run(); 2420 } 2421 2422 void gap_discoverable_control(uint8_t enable){ 2423 if (enable) enable = 1; // normalize argument 2424 2425 if (hci_stack->discoverable == enable){ 2426 hci_emit_discoverable_enabled(hci_stack->discoverable); 2427 return; 2428 } 2429 2430 hci_stack->discoverable = enable; 2431 hci_update_scan_enable(); 2432 } 2433 2434 void gap_connectable_control(uint8_t enable){ 2435 if (enable) enable = 1; // normalize argument 2436 2437 // don't emit event 2438 if (hci_stack->connectable == enable) return; 2439 2440 hci_stack->connectable = enable; 2441 hci_update_scan_enable(); 2442 } 2443 #endif 2444 2445 void gap_local_bd_addr(bd_addr_t address_buffer){ 2446 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2447 } 2448 2449 static void hci_run(void){ 2450 2451 // log_info("hci_run: entered"); 2452 btstack_linked_item_t * it; 2453 2454 // send continuation fragments first, as they block the prepared packet buffer 2455 if (hci_stack->acl_fragmentation_total_size > 0) { 2456 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2457 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2458 if (connection) { 2459 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2460 hci_send_acl_packet_fragments(connection); 2461 return; 2462 } 2463 } else { 2464 // connection gone -> discard further fragments 2465 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2466 hci_stack->acl_fragmentation_total_size = 0; 2467 hci_stack->acl_fragmentation_pos = 0; 2468 } 2469 } 2470 2471 if (!hci_can_send_command_packet_now()) return; 2472 2473 // global/non-connection oriented commands 2474 2475 #ifdef ENABLE_CLASSIC 2476 // decline incoming connections 2477 if (hci_stack->decline_reason){ 2478 uint8_t reason = hci_stack->decline_reason; 2479 hci_stack->decline_reason = 0; 2480 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2481 return; 2482 } 2483 2484 // send scan enable 2485 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2486 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2487 hci_stack->new_scan_enable_value = 0xff; 2488 return; 2489 } 2490 #endif 2491 2492 #ifdef ENABLE_BLE 2493 if (hci_stack->state == HCI_STATE_WORKING){ 2494 // handle le scan 2495 switch(hci_stack->le_scanning_state){ 2496 case LE_START_SCAN: 2497 hci_stack->le_scanning_state = LE_SCANNING; 2498 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2499 return; 2500 2501 case LE_STOP_SCAN: 2502 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2503 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2504 return; 2505 default: 2506 break; 2507 } 2508 if (hci_stack->le_scan_type != 0xff){ 2509 // defaults: active scanning, accept all advertisement packets 2510 int scan_type = hci_stack->le_scan_type; 2511 hci_stack->le_scan_type = 0xff; 2512 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); 2513 return; 2514 } 2515 // le advertisement control 2516 if (hci_stack->le_advertisements_todo){ 2517 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2518 } 2519 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2520 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2521 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2522 return; 2523 } 2524 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2525 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2526 hci_send_cmd(&hci_le_set_advertising_parameters, 2527 hci_stack->le_advertisements_interval_min, 2528 hci_stack->le_advertisements_interval_max, 2529 hci_stack->le_advertisements_type, 2530 hci_stack->le_advertisements_own_address_type, 2531 hci_stack->le_advertisements_direct_address_type, 2532 hci_stack->le_advertisements_direct_address, 2533 hci_stack->le_advertisements_channel_map, 2534 hci_stack->le_advertisements_filter_policy); 2535 return; 2536 } 2537 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2538 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2539 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2540 hci_stack->le_advertisements_data); 2541 return; 2542 } 2543 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2544 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2545 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2546 hci_stack->le_scan_response_data); 2547 return; 2548 } 2549 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2550 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2551 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2552 return; 2553 } 2554 2555 // 2556 // LE Whitelist Management 2557 // 2558 2559 // check if whitelist needs modification 2560 btstack_linked_list_iterator_t lit; 2561 int modification_pending = 0; 2562 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2563 while (btstack_linked_list_iterator_has_next(&lit)){ 2564 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2565 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2566 modification_pending = 1; 2567 break; 2568 } 2569 } 2570 2571 if (modification_pending){ 2572 // stop connnecting if modification pending 2573 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2574 hci_send_cmd(&hci_le_create_connection_cancel); 2575 return; 2576 } 2577 2578 // add/remove entries 2579 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2580 while (btstack_linked_list_iterator_has_next(&lit)){ 2581 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2582 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2583 entry->state = LE_WHITELIST_ON_CONTROLLER; 2584 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2585 return; 2586 2587 } 2588 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2589 bd_addr_t address; 2590 bd_addr_type_t address_type = entry->address_type; 2591 memcpy(address, entry->address, 6); 2592 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2593 btstack_memory_whitelist_entry_free(entry); 2594 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2595 return; 2596 } 2597 } 2598 } 2599 2600 // start connecting 2601 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2602 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2603 bd_addr_t null_addr; 2604 memset(null_addr, 0, 6); 2605 hci_send_cmd(&hci_le_create_connection, 2606 0x0060, // scan interval: 60 ms 2607 0x0030, // scan interval: 30 ms 2608 1, // use whitelist 2609 0, // peer address type 2610 null_addr, // peer bd addr 2611 hci_stack->adv_addr_type, // our addr type: 2612 0x0008, // conn interval min 2613 0x0018, // conn interval max 2614 0, // conn latency 2615 0x0048, // supervision timeout 2616 0x0001, // min ce length 2617 0x0001 // max ce length 2618 ); 2619 return; 2620 } 2621 } 2622 #endif 2623 2624 // send pending HCI commands 2625 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2626 hci_connection_t * connection = (hci_connection_t *) it; 2627 2628 switch(connection->state){ 2629 case SEND_CREATE_CONNECTION: 2630 switch(connection->address_type){ 2631 #ifdef ENABLE_CLASSIC 2632 case BD_ADDR_TYPE_CLASSIC: 2633 log_info("sending hci_create_connection"); 2634 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2635 break; 2636 #endif 2637 default: 2638 #ifdef ENABLE_BLE 2639 log_info("sending hci_le_create_connection"); 2640 hci_send_cmd(&hci_le_create_connection, 2641 0x0060, // scan interval: 60 ms 2642 0x0030, // scan interval: 30 ms 2643 0, // don't use whitelist 2644 connection->address_type, // peer address type 2645 connection->address, // peer bd addr 2646 hci_stack->adv_addr_type, // our addr type: 2647 0x0008, // conn interval min 2648 0x0018, // conn interval max 2649 0, // conn latency 2650 0x0048, // supervision timeout 2651 0x0001, // min ce length 2652 0x0001 // max ce length 2653 ); 2654 2655 connection->state = SENT_CREATE_CONNECTION; 2656 #endif 2657 break; 2658 } 2659 return; 2660 2661 #ifdef ENABLE_CLASSIC 2662 case RECEIVED_CONNECTION_REQUEST: 2663 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2664 connection->state = ACCEPTED_CONNECTION_REQUEST; 2665 connection->role = HCI_ROLE_SLAVE; 2666 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2667 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2668 } 2669 return; 2670 #endif 2671 2672 #ifdef ENABLE_BLE 2673 case SEND_CANCEL_CONNECTION: 2674 connection->state = SENT_CANCEL_CONNECTION; 2675 hci_send_cmd(&hci_le_create_connection_cancel); 2676 return; 2677 #endif 2678 case SEND_DISCONNECT: 2679 connection->state = SENT_DISCONNECT; 2680 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2681 return; 2682 2683 default: 2684 break; 2685 } 2686 2687 #ifdef ENABLE_CLASSIC 2688 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2689 log_info("responding to link key request"); 2690 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2691 link_key_t link_key; 2692 link_key_type_t link_key_type; 2693 if ( hci_stack->link_key_db 2694 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2695 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2696 connection->link_key_type = link_key_type; 2697 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2698 } else { 2699 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2700 } 2701 return; 2702 } 2703 2704 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2705 log_info("denying to pin request"); 2706 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2707 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2708 return; 2709 } 2710 2711 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2712 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2713 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2714 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2715 // tweak authentication requirements 2716 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2717 if (connection->bonding_flags & BONDING_DEDICATED){ 2718 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2719 } 2720 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2721 authreq |= 1; 2722 } 2723 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2724 } else { 2725 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2726 } 2727 return; 2728 } 2729 2730 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2731 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2732 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2733 return; 2734 } 2735 2736 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2737 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2738 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2739 return; 2740 } 2741 #endif 2742 2743 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2744 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2745 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2746 return; 2747 } 2748 2749 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2750 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2751 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2752 return; 2753 } 2754 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2755 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2756 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2757 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2758 return; 2759 } 2760 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2761 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2762 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2763 return; 2764 } 2765 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2766 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2767 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2768 return; 2769 } 2770 2771 #ifdef ENABLE_BLE 2772 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2773 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2774 2775 uint16_t connection_interval_min = connection->le_conn_interval_min; 2776 connection->le_conn_interval_min = 0; 2777 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2778 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2779 0x0000, 0xffff); 2780 } 2781 #endif 2782 } 2783 2784 hci_connection_t * connection; 2785 switch (hci_stack->state){ 2786 case HCI_STATE_INITIALIZING: 2787 hci_initializing_run(); 2788 break; 2789 2790 case HCI_STATE_HALTING: 2791 2792 log_info("HCI_STATE_HALTING"); 2793 2794 // free whitelist entries 2795 #ifdef ENABLE_BLE 2796 { 2797 btstack_linked_list_iterator_t lit; 2798 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2799 while (btstack_linked_list_iterator_has_next(&lit)){ 2800 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2801 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2802 btstack_memory_whitelist_entry_free(entry); 2803 } 2804 } 2805 #endif 2806 // close all open connections 2807 connection = (hci_connection_t *) hci_stack->connections; 2808 if (connection){ 2809 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2810 if (!hci_can_send_command_packet_now()) return; 2811 2812 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2813 2814 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2815 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2816 2817 // ... which would be ignored anyway as we shutdown (free) the connection now 2818 hci_shutdown_connection(connection); 2819 2820 // finally, send the disconnect command 2821 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2822 return; 2823 } 2824 log_info("HCI_STATE_HALTING, calling off"); 2825 2826 // switch mode 2827 hci_power_control_off(); 2828 2829 log_info("HCI_STATE_HALTING, emitting state"); 2830 hci_emit_state(); 2831 log_info("HCI_STATE_HALTING, done"); 2832 break; 2833 2834 case HCI_STATE_FALLING_ASLEEP: 2835 switch(hci_stack->substate) { 2836 case HCI_FALLING_ASLEEP_DISCONNECT: 2837 log_info("HCI_STATE_FALLING_ASLEEP"); 2838 // close all open connections 2839 connection = (hci_connection_t *) hci_stack->connections; 2840 2841 #ifdef HAVE_PLATFORM_IPHONE_OS 2842 // don't close connections, if H4 supports power management 2843 if (btstack_control_iphone_power_management_enabled()){ 2844 connection = NULL; 2845 } 2846 #endif 2847 if (connection){ 2848 2849 // send disconnect 2850 if (!hci_can_send_command_packet_now()) return; 2851 2852 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2853 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2854 2855 // send disconnected event right away - causes higher layer connections to get closed, too. 2856 hci_shutdown_connection(connection); 2857 return; 2858 } 2859 2860 if (hci_classic_supported()){ 2861 // disable page and inquiry scan 2862 if (!hci_can_send_command_packet_now()) return; 2863 2864 log_info("HCI_STATE_HALTING, disabling inq scans"); 2865 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2866 2867 // continue in next sub state 2868 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2869 break; 2870 } 2871 // no break - fall through for ble-only chips 2872 2873 case HCI_FALLING_ASLEEP_COMPLETE: 2874 log_info("HCI_STATE_HALTING, calling sleep"); 2875 #ifdef HAVE_PLATFORM_IPHONE_OS 2876 // don't actually go to sleep, if H4 supports power management 2877 if (btstack_control_iphone_power_management_enabled()){ 2878 // SLEEP MODE reached 2879 hci_stack->state = HCI_STATE_SLEEPING; 2880 hci_emit_state(); 2881 break; 2882 } 2883 #endif 2884 // switch mode 2885 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2886 hci_emit_state(); 2887 break; 2888 2889 default: 2890 break; 2891 } 2892 break; 2893 2894 default: 2895 break; 2896 } 2897 } 2898 2899 int hci_send_cmd_packet(uint8_t *packet, int size){ 2900 // house-keeping 2901 2902 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2903 hci_stack->loopback_mode = packet[3]; 2904 } 2905 2906 #ifdef ENABLE_CLASSIC 2907 bd_addr_t addr; 2908 hci_connection_t * conn; 2909 2910 // create_connection? 2911 if (IS_COMMAND(packet, hci_create_connection)){ 2912 reverse_bd_addr(&packet[3], addr); 2913 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2914 2915 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2916 if (!conn){ 2917 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2918 if (!conn){ 2919 // notify client that alloc failed 2920 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2921 return 0; // don't sent packet to controller 2922 } 2923 conn->state = SEND_CREATE_CONNECTION; 2924 } 2925 log_info("conn state %u", conn->state); 2926 switch (conn->state){ 2927 // if connection active exists 2928 case OPEN: 2929 // and OPEN, emit connection complete command, don't send to controller 2930 hci_emit_connection_complete(addr, conn->con_handle, 0); 2931 return 0; 2932 case SEND_CREATE_CONNECTION: 2933 // connection created by hci, e.g. dedicated bonding 2934 break; 2935 default: 2936 // otherwise, just ignore as it is already in the open process 2937 return 0; 2938 } 2939 conn->state = SENT_CREATE_CONNECTION; 2940 } 2941 2942 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2943 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2944 } 2945 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2946 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2947 } 2948 2949 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2950 if (hci_stack->link_key_db){ 2951 reverse_bd_addr(&packet[3], addr); 2952 hci_stack->link_key_db->delete_link_key(addr); 2953 } 2954 } 2955 2956 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2957 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2958 reverse_bd_addr(&packet[3], addr); 2959 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2960 if (conn){ 2961 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2962 } 2963 } 2964 2965 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2966 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2967 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2968 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2969 reverse_bd_addr(&packet[3], addr); 2970 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2971 if (conn){ 2972 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2973 } 2974 } 2975 #endif 2976 2977 #ifdef ENABLE_BLE 2978 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2979 hci_stack->adv_addr_type = packet[8]; 2980 } 2981 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2982 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2983 } 2984 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2985 hci_stack->le_advertisements_active = packet[3]; 2986 } 2987 if (IS_COMMAND(packet, hci_le_create_connection)){ 2988 // white list used? 2989 uint8_t initiator_filter_policy = packet[7]; 2990 switch (initiator_filter_policy){ 2991 case 0: 2992 // whitelist not used 2993 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2994 break; 2995 case 1: 2996 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2997 break; 2998 default: 2999 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3000 break; 3001 } 3002 } 3003 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3004 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3005 } 3006 #endif 3007 3008 hci_stack->num_cmd_packets--; 3009 3010 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3011 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3012 3013 // release packet buffer for synchronous transport implementations 3014 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3015 hci_stack->hci_packet_buffer_reserved = 0; 3016 } 3017 3018 return err; 3019 } 3020 3021 // disconnect because of security block 3022 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3023 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3024 if (!connection) return; 3025 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3026 } 3027 3028 3029 // Configure Secure Simple Pairing 3030 3031 #ifdef ENABLE_CLASSIC 3032 3033 // enable will enable SSP during init 3034 void gap_ssp_set_enable(int enable){ 3035 hci_stack->ssp_enable = enable; 3036 } 3037 3038 static int hci_local_ssp_activated(void){ 3039 return gap_ssp_supported() && hci_stack->ssp_enable; 3040 } 3041 3042 // if set, BTstack will respond to io capability request using authentication requirement 3043 void gap_ssp_set_io_capability(int io_capability){ 3044 hci_stack->ssp_io_capability = io_capability; 3045 } 3046 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3047 hci_stack->ssp_authentication_requirement = authentication_requirement; 3048 } 3049 3050 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3051 void gap_ssp_set_auto_accept(int auto_accept){ 3052 hci_stack->ssp_auto_accept = auto_accept; 3053 } 3054 #endif 3055 3056 /** 3057 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3058 */ 3059 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3060 3061 if (!hci_can_send_command_packet_now()){ 3062 log_error("hci_send_cmd called but cannot send packet now"); 3063 return 0; 3064 } 3065 3066 // for HCI INITIALIZATION 3067 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3068 hci_stack->last_cmd_opcode = cmd->opcode; 3069 3070 hci_reserve_packet_buffer(); 3071 uint8_t * packet = hci_stack->hci_packet_buffer; 3072 3073 va_list argptr; 3074 va_start(argptr, cmd); 3075 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3076 va_end(argptr); 3077 3078 return hci_send_cmd_packet(packet, size); 3079 } 3080 3081 // Create various non-HCI events. 3082 // TODO: generalize, use table similar to hci_create_command 3083 3084 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3085 // dump packet 3086 if (dump) { 3087 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3088 } 3089 3090 // dispatch to all event handlers 3091 btstack_linked_list_iterator_t it; 3092 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3093 while (btstack_linked_list_iterator_has_next(&it)){ 3094 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3095 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3096 } 3097 } 3098 3099 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3100 if (!hci_stack->acl_packet_handler) return; 3101 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3102 } 3103 3104 #ifdef ENABLE_CLASSIC 3105 static void hci_notify_if_sco_can_send_now(void){ 3106 // notify SCO sender if waiting 3107 if (!hci_stack->sco_waiting_for_can_send_now) return; 3108 if (hci_can_send_sco_packet_now()){ 3109 hci_stack->sco_waiting_for_can_send_now = 0; 3110 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3111 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3112 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3113 } 3114 } 3115 #endif 3116 3117 void hci_emit_state(void){ 3118 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3119 uint8_t event[3]; 3120 event[0] = BTSTACK_EVENT_STATE; 3121 event[1] = sizeof(event) - 2; 3122 event[2] = hci_stack->state; 3123 hci_emit_event(event, sizeof(event), 1); 3124 } 3125 3126 #ifdef ENABLE_CLASSIC 3127 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3128 uint8_t event[13]; 3129 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3130 event[1] = sizeof(event) - 2; 3131 event[2] = status; 3132 little_endian_store_16(event, 3, con_handle); 3133 reverse_bd_addr(address, &event[5]); 3134 event[11] = 1; // ACL connection 3135 event[12] = 0; // encryption disabled 3136 hci_emit_event(event, sizeof(event), 1); 3137 } 3138 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3139 if (disable_l2cap_timeouts) return; 3140 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3141 uint8_t event[4]; 3142 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3143 event[1] = sizeof(event) - 2; 3144 little_endian_store_16(event, 2, conn->con_handle); 3145 hci_emit_event(event, sizeof(event), 1); 3146 } 3147 #endif 3148 3149 #ifdef ENABLE_BLE 3150 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3151 uint8_t event[21]; 3152 event[0] = HCI_EVENT_LE_META; 3153 event[1] = sizeof(event) - 2; 3154 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3155 event[3] = status; 3156 little_endian_store_16(event, 4, con_handle); 3157 event[6] = 0; // TODO: role 3158 event[7] = address_type; 3159 reverse_bd_addr(address, &event[8]); 3160 little_endian_store_16(event, 14, 0); // interval 3161 little_endian_store_16(event, 16, 0); // latency 3162 little_endian_store_16(event, 18, 0); // supervision timeout 3163 event[20] = 0; // master clock accuracy 3164 hci_emit_event(event, sizeof(event), 1); 3165 } 3166 #endif 3167 3168 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3169 uint8_t event[6]; 3170 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3171 event[1] = sizeof(event) - 2; 3172 event[2] = 0; // status = OK 3173 little_endian_store_16(event, 3, con_handle); 3174 event[5] = reason; 3175 hci_emit_event(event, sizeof(event), 1); 3176 } 3177 3178 static void hci_emit_nr_connections_changed(void){ 3179 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3180 uint8_t event[3]; 3181 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3182 event[1] = sizeof(event) - 2; 3183 event[2] = nr_hci_connections(); 3184 hci_emit_event(event, sizeof(event), 1); 3185 } 3186 3187 static void hci_emit_hci_open_failed(void){ 3188 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3189 uint8_t event[2]; 3190 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3191 event[1] = sizeof(event) - 2; 3192 hci_emit_event(event, sizeof(event), 1); 3193 } 3194 3195 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3196 log_info("hci_emit_dedicated_bonding_result %u ", status); 3197 uint8_t event[9]; 3198 int pos = 0; 3199 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3200 event[pos++] = sizeof(event) - 2; 3201 event[pos++] = status; 3202 reverse_bd_addr(address, &event[pos]); 3203 hci_emit_event(event, sizeof(event), 1); 3204 } 3205 3206 3207 #ifdef ENABLE_CLASSIC 3208 3209 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3210 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3211 uint8_t event[5]; 3212 int pos = 0; 3213 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3214 event[pos++] = sizeof(event) - 2; 3215 little_endian_store_16(event, 2, con_handle); 3216 pos += 2; 3217 event[pos++] = level; 3218 hci_emit_event(event, sizeof(event), 1); 3219 } 3220 3221 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3222 if (!connection) return LEVEL_0; 3223 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3224 return gap_security_level_for_link_key_type(connection->link_key_type); 3225 } 3226 3227 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3228 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3229 uint8_t event[3]; 3230 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3231 event[1] = sizeof(event) - 2; 3232 event[2] = enabled; 3233 hci_emit_event(event, sizeof(event), 1); 3234 } 3235 3236 // query if remote side supports eSCO 3237 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3238 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3239 if (!connection) return 0; 3240 return connection->remote_supported_feature_eSCO; 3241 } 3242 3243 // query if remote side supports SSP 3244 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3245 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3246 if (!connection) return 0; 3247 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3248 } 3249 3250 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3251 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3252 } 3253 3254 // GAP API 3255 /** 3256 * @bbrief enable/disable bonding. default is enabled 3257 * @praram enabled 3258 */ 3259 void gap_set_bondable_mode(int enable){ 3260 hci_stack->bondable = enable ? 1 : 0; 3261 } 3262 /** 3263 * @brief Get bondable mode. 3264 * @return 1 if bondable 3265 */ 3266 int gap_get_bondable_mode(void){ 3267 return hci_stack->bondable; 3268 } 3269 3270 /** 3271 * @brief map link keys to security levels 3272 */ 3273 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3274 switch (link_key_type){ 3275 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3276 return LEVEL_4; 3277 case COMBINATION_KEY: 3278 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3279 return LEVEL_3; 3280 default: 3281 return LEVEL_2; 3282 } 3283 } 3284 3285 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3286 log_info("gap_mitm_protection_required_for_security_level %u", level); 3287 return level > LEVEL_2; 3288 } 3289 3290 /** 3291 * @brief get current security level 3292 */ 3293 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3294 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3295 if (!connection) return LEVEL_0; 3296 return gap_security_level_for_connection(connection); 3297 } 3298 3299 /** 3300 * @brief request connection to device to 3301 * @result GAP_AUTHENTICATION_RESULT 3302 */ 3303 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3304 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3305 if (!connection){ 3306 hci_emit_security_level(con_handle, LEVEL_0); 3307 return; 3308 } 3309 gap_security_level_t current_level = gap_security_level(con_handle); 3310 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3311 if (current_level >= requested_level){ 3312 hci_emit_security_level(con_handle, current_level); 3313 return; 3314 } 3315 3316 connection->requested_security_level = requested_level; 3317 3318 #if 0 3319 // sending encryption request without a link key results in an error. 3320 // TODO: figure out how to use it properly 3321 3322 // would enabling ecnryption suffice (>= LEVEL_2)? 3323 if (hci_stack->link_key_db){ 3324 link_key_type_t link_key_type; 3325 link_key_t link_key; 3326 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3327 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3328 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3329 return; 3330 } 3331 } 3332 } 3333 #endif 3334 3335 // try to authenticate connection 3336 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3337 hci_run(); 3338 } 3339 3340 /** 3341 * @brief start dedicated bonding with device. disconnect after bonding 3342 * @param device 3343 * @param request MITM protection 3344 * @result GAP_DEDICATED_BONDING_COMPLETE 3345 */ 3346 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3347 3348 // create connection state machine 3349 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3350 3351 if (!connection){ 3352 return BTSTACK_MEMORY_ALLOC_FAILED; 3353 } 3354 3355 // delete linkn key 3356 gap_drop_link_key_for_bd_addr(device); 3357 3358 // configure LEVEL_2/3, dedicated bonding 3359 connection->state = SEND_CREATE_CONNECTION; 3360 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3361 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3362 connection->bonding_flags = BONDING_DEDICATED; 3363 3364 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3365 3366 // handle: connnection failure (connection complete != ok) 3367 // handle: authentication failure 3368 // handle: disconnect on done 3369 3370 hci_run(); 3371 3372 return 0; 3373 } 3374 #endif 3375 3376 void gap_set_local_name(const char * local_name){ 3377 hci_stack->local_name = local_name; 3378 } 3379 3380 3381 #ifdef ENABLE_BLE 3382 3383 void gap_start_scan(void){ 3384 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3385 hci_stack->le_scanning_state = LE_START_SCAN; 3386 hci_run(); 3387 } 3388 3389 void gap_stop_scan(void){ 3390 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3391 hci_stack->le_scanning_state = LE_STOP_SCAN; 3392 hci_run(); 3393 } 3394 3395 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3396 hci_stack->le_scan_type = scan_type; 3397 hci_stack->le_scan_interval = scan_interval; 3398 hci_stack->le_scan_window = scan_window; 3399 hci_run(); 3400 } 3401 3402 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3403 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3404 if (!conn){ 3405 log_info("gap_connect: no connection exists yet, creating context"); 3406 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3407 if (!conn){ 3408 // notify client that alloc failed 3409 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3410 log_info("gap_connect: failed to alloc hci_connection_t"); 3411 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3412 } 3413 conn->state = SEND_CREATE_CONNECTION; 3414 log_info("gap_connect: send create connection next"); 3415 hci_run(); 3416 return 0; 3417 } 3418 3419 if (!hci_is_le_connection(conn) || 3420 conn->state == SEND_CREATE_CONNECTION || 3421 conn->state == SENT_CREATE_CONNECTION) { 3422 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3423 log_error("gap_connect: classic connection or connect is already being created"); 3424 return GATT_CLIENT_IN_WRONG_STATE; 3425 } 3426 3427 log_info("gap_connect: context exists with state %u", conn->state); 3428 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3429 hci_run(); 3430 return 0; 3431 } 3432 3433 // @assumption: only a single outgoing LE Connection exists 3434 static hci_connection_t * gap_get_outgoing_connection(void){ 3435 btstack_linked_item_t *it; 3436 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3437 hci_connection_t * conn = (hci_connection_t *) it; 3438 if (!hci_is_le_connection(conn)) continue; 3439 switch (conn->state){ 3440 case SEND_CREATE_CONNECTION: 3441 case SENT_CREATE_CONNECTION: 3442 return conn; 3443 default: 3444 break; 3445 }; 3446 } 3447 return NULL; 3448 } 3449 3450 uint8_t gap_connect_cancel(void){ 3451 hci_connection_t * conn = gap_get_outgoing_connection(); 3452 if (!conn) return 0; 3453 switch (conn->state){ 3454 case SEND_CREATE_CONNECTION: 3455 // skip sending create connection and emit event instead 3456 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3457 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3458 btstack_memory_hci_connection_free( conn ); 3459 break; 3460 case SENT_CREATE_CONNECTION: 3461 // request to send cancel connection 3462 conn->state = SEND_CANCEL_CONNECTION; 3463 hci_run(); 3464 break; 3465 default: 3466 break; 3467 } 3468 return 0; 3469 } 3470 3471 /** 3472 * @brief Updates the connection parameters for a given LE connection 3473 * @param handle 3474 * @param conn_interval_min (unit: 1.25ms) 3475 * @param conn_interval_max (unit: 1.25ms) 3476 * @param conn_latency 3477 * @param supervision_timeout (unit: 10ms) 3478 * @returns 0 if ok 3479 */ 3480 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3481 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3482 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3483 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3484 connection->le_conn_interval_min = conn_interval_min; 3485 connection->le_conn_interval_max = conn_interval_max; 3486 connection->le_conn_latency = conn_latency; 3487 connection->le_supervision_timeout = supervision_timeout; 3488 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3489 hci_run(); 3490 return 0; 3491 } 3492 3493 /** 3494 * @brief Request an update of the connection parameter for a given LE connection 3495 * @param handle 3496 * @param conn_interval_min (unit: 1.25ms) 3497 * @param conn_interval_max (unit: 1.25ms) 3498 * @param conn_latency 3499 * @param supervision_timeout (unit: 10ms) 3500 * @returns 0 if ok 3501 */ 3502 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3503 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3504 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3505 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3506 connection->le_conn_interval_min = conn_interval_min; 3507 connection->le_conn_interval_max = conn_interval_max; 3508 connection->le_conn_latency = conn_latency; 3509 connection->le_supervision_timeout = supervision_timeout; 3510 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3511 hci_run(); 3512 return 0; 3513 } 3514 3515 static void gap_advertisments_changed(void){ 3516 // disable advertisements before updating adv, scan data, or adv params 3517 if (hci_stack->le_advertisements_active){ 3518 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3519 } 3520 hci_run(); 3521 } 3522 3523 /** 3524 * @brief Set Advertisement Data 3525 * @param advertising_data_length 3526 * @param advertising_data (max 31 octets) 3527 * @note data is not copied, pointer has to stay valid 3528 */ 3529 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3530 hci_stack->le_advertisements_data_len = advertising_data_length; 3531 hci_stack->le_advertisements_data = advertising_data; 3532 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3533 gap_advertisments_changed(); 3534 } 3535 3536 /** 3537 * @brief Set Scan Response Data 3538 * @param advertising_data_length 3539 * @param advertising_data (max 31 octets) 3540 * @note data is not copied, pointer has to stay valid 3541 */ 3542 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3543 hci_stack->le_scan_response_data_len = scan_response_data_length; 3544 hci_stack->le_scan_response_data = scan_response_data; 3545 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3546 gap_advertisments_changed(); 3547 } 3548 3549 /** 3550 * @brief Set Advertisement Parameters 3551 * @param adv_int_min 3552 * @param adv_int_max 3553 * @param adv_type 3554 * @param own_address_type 3555 * @param direct_address_type 3556 * @param direct_address 3557 * @param channel_map 3558 * @param filter_policy 3559 * 3560 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3561 */ 3562 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3563 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3564 uint8_t channel_map, uint8_t filter_policy) { 3565 3566 hci_stack->le_advertisements_interval_min = adv_int_min; 3567 hci_stack->le_advertisements_interval_max = adv_int_max; 3568 hci_stack->le_advertisements_type = adv_type; 3569 hci_stack->le_advertisements_own_address_type = own_address_type; 3570 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3571 hci_stack->le_advertisements_channel_map = channel_map; 3572 hci_stack->le_advertisements_filter_policy = filter_policy; 3573 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3574 3575 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3576 gap_advertisments_changed(); 3577 } 3578 3579 /** 3580 * @brief Enable/Disable Advertisements 3581 * @param enabled 3582 */ 3583 void gap_advertisements_enable(int enabled){ 3584 hci_stack->le_advertisements_enabled = enabled; 3585 if (enabled && !hci_stack->le_advertisements_active){ 3586 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3587 } 3588 if (!enabled && hci_stack->le_advertisements_active){ 3589 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3590 } 3591 hci_run(); 3592 } 3593 3594 #endif 3595 3596 uint8_t gap_disconnect(hci_con_handle_t handle){ 3597 hci_connection_t * conn = hci_connection_for_handle(handle); 3598 if (!conn){ 3599 hci_emit_disconnection_complete(handle, 0); 3600 return 0; 3601 } 3602 conn->state = SEND_DISCONNECT; 3603 hci_run(); 3604 return 0; 3605 } 3606 3607 /** 3608 * @brief Get connection type 3609 * @param con_handle 3610 * @result connection_type 3611 */ 3612 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3613 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3614 if (!conn) return GAP_CONNECTION_INVALID; 3615 switch (conn->address_type){ 3616 case BD_ADDR_TYPE_LE_PUBLIC: 3617 case BD_ADDR_TYPE_LE_RANDOM: 3618 return GAP_CONNECTION_LE; 3619 case BD_ADDR_TYPE_SCO: 3620 return GAP_CONNECTION_SCO; 3621 case BD_ADDR_TYPE_CLASSIC: 3622 return GAP_CONNECTION_ACL; 3623 default: 3624 return GAP_CONNECTION_INVALID; 3625 } 3626 } 3627 3628 #ifdef ENABLE_BLE 3629 3630 /** 3631 * @brief Auto Connection Establishment - Start Connecting to device 3632 * @param address_typ 3633 * @param address 3634 * @returns 0 if ok 3635 */ 3636 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3637 // check capacity 3638 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3639 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3640 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3641 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3642 entry->address_type = address_type; 3643 memcpy(entry->address, address, 6); 3644 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3645 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3646 hci_run(); 3647 return 0; 3648 } 3649 3650 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3651 btstack_linked_list_iterator_t it; 3652 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3653 while (btstack_linked_list_iterator_has_next(&it)){ 3654 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3655 if (entry->address_type != address_type) continue; 3656 if (memcmp(entry->address, address, 6) != 0) continue; 3657 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3658 // remove from controller if already present 3659 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3660 continue; 3661 } 3662 // direclty remove entry from whitelist 3663 btstack_linked_list_iterator_remove(&it); 3664 btstack_memory_whitelist_entry_free(entry); 3665 } 3666 } 3667 3668 /** 3669 * @brief Auto Connection Establishment - Stop Connecting to device 3670 * @param address_typ 3671 * @param address 3672 * @returns 0 if ok 3673 */ 3674 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3675 hci_remove_from_whitelist(address_type, address); 3676 hci_run(); 3677 return 0; 3678 } 3679 3680 /** 3681 * @brief Auto Connection Establishment - Stop everything 3682 * @note Convenience function to stop all active auto connection attempts 3683 */ 3684 void gap_auto_connection_stop_all(void){ 3685 btstack_linked_list_iterator_t it; 3686 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3687 while (btstack_linked_list_iterator_has_next(&it)){ 3688 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3689 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3690 // remove from controller if already present 3691 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3692 continue; 3693 } 3694 // directly remove entry from whitelist 3695 btstack_linked_list_iterator_remove(&it); 3696 btstack_memory_whitelist_entry_free(entry); 3697 } 3698 hci_run(); 3699 } 3700 3701 #endif 3702 3703 #ifdef ENABLE_CLASSIC 3704 /** 3705 * @brief Set Extended Inquiry Response data 3706 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3707 * @note has to be done before stack starts up 3708 */ 3709 void gap_set_extended_inquiry_response(const uint8_t * data){ 3710 hci_stack->eir_data = data; 3711 } 3712 3713 /** 3714 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3715 * @param inquriy_mode see bluetooth_defines.h 3716 */ 3717 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3718 hci_stack->inquiry_mode = mode; 3719 } 3720 3721 /** 3722 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3723 */ 3724 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3725 hci_stack->sco_voice_setting = voice_setting; 3726 } 3727 3728 /** 3729 * @brief Get SCO Voice Setting 3730 * @return current voice setting 3731 */ 3732 uint16_t hci_get_sco_voice_setting(void){ 3733 return hci_stack->sco_voice_setting; 3734 } 3735 3736 /** @brief Get SCO packet length for current SCO Voice setting 3737 * @note Using SCO packets of the exact length is required for USB transfer 3738 * @return Length of SCO packets in bytes (not audio frames) 3739 */ 3740 int hci_get_sco_packet_length(void){ 3741 // see Core Spec for H2 USB Transfer. 3742 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3743 return 27; 3744 } 3745 #endif 3746 3747 /** 3748 * @brief Set callback for Bluetooth Hardware Error 3749 */ 3750 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3751 hci_stack->hardware_error_callback = fn; 3752 } 3753 3754 /** 3755 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3756 * @note Can be used to select chipset driver dynamically during startup 3757 */ 3758 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3759 hci_stack->local_version_information_callback = fn; 3760 } 3761 3762 void hci_disconnect_all(void){ 3763 btstack_linked_list_iterator_t it; 3764 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3765 while (btstack_linked_list_iterator_has_next(&it)){ 3766 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3767 if (con->state == SENT_DISCONNECT) continue; 3768 con->state = SEND_DISCONNECT; 3769 } 3770 hci_run(); 3771 } 3772