1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef HAVE_EMBEDDED_TICK 49 #include "btstack_run_loop_embedded.h" 50 #endif 51 52 #ifdef HAVE_PLATFORM_IPHONE_OS 53 #include "../port/ios/src/btstack_control_iphone.h" 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #endif 59 60 #include <stdarg.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "gap.h" 70 #include "hci.h" 71 #include "hci_cmd.h" 72 #include "hci_dump.h" 73 74 75 #define HCI_CONNECTION_TIMEOUT_MS 10000 76 #define HCI_RESET_RESEND_TIMEOUT_MS 200 77 78 // prototypes 79 static void hci_update_scan_enable(void); 80 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 81 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 82 static void hci_connection_timestamp(hci_connection_t *connection); 83 static int hci_power_control_on(void); 84 static void hci_power_control_off(void); 85 static void hci_state_reset(void); 86 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 87 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 88 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 89 static void hci_emit_nr_connections_changed(void); 90 static void hci_emit_hci_open_failed(void); 91 static void hci_emit_discoverable_enabled(uint8_t enabled); 92 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 93 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 94 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 95 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 96 static void hci_notify_if_sco_can_send_now(void); 97 static void hci_run(void); 98 static int hci_is_le_connection(hci_connection_t * connection); 99 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 100 static int hci_local_ssp_activated(void); 101 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 102 103 #ifdef ENABLE_BLE 104 // called from test/ble_client/advertising_data_parser.c 105 void le_handle_advertisement_report(uint8_t *packet, int size); 106 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 107 #endif 108 109 // the STACK is here 110 #ifndef HAVE_MALLOC 111 static hci_stack_t hci_stack_static; 112 #endif 113 static hci_stack_t * hci_stack = NULL; 114 115 // test helper 116 static uint8_t disable_l2cap_timeouts = 0; 117 118 /** 119 * create connection for given address 120 * 121 * @return connection OR NULL, if no memory left 122 */ 123 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 124 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 125 hci_connection_t * conn = btstack_memory_hci_connection_get(); 126 if (!conn) return NULL; 127 memset(conn, 0, sizeof(hci_connection_t)); 128 bd_addr_copy(conn->address, addr); 129 conn->address_type = addr_type; 130 conn->con_handle = 0xffff; 131 conn->authentication_flags = AUTH_FLAGS_NONE; 132 conn->bonding_flags = 0; 133 conn->requested_security_level = LEVEL_0; 134 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 135 btstack_run_loop_set_timer_context(&conn->timeout, conn); 136 hci_connection_timestamp(conn); 137 conn->acl_recombination_length = 0; 138 conn->acl_recombination_pos = 0; 139 conn->num_acl_packets_sent = 0; 140 conn->num_sco_packets_sent = 0; 141 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 142 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 143 return conn; 144 } 145 146 147 /** 148 * get le connection parameter range 149 * 150 * @return le connection parameter range struct 151 */ 152 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 153 *range = hci_stack->le_connection_parameter_range; 154 } 155 156 /** 157 * set le connection parameter range 158 * 159 */ 160 161 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 162 hci_stack->le_connection_parameter_range = *range; 163 } 164 165 /** 166 * get hci connections iterator 167 * 168 * @return hci connections iterator 169 */ 170 171 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 172 btstack_linked_list_iterator_init(it, &hci_stack->connections); 173 } 174 175 /** 176 * get connection for a given handle 177 * 178 * @return connection OR NULL, if not found 179 */ 180 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 181 btstack_linked_list_iterator_t it; 182 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 183 while (btstack_linked_list_iterator_has_next(&it)){ 184 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 185 if ( item->con_handle == con_handle ) { 186 return item; 187 } 188 } 189 return NULL; 190 } 191 192 /** 193 * get connection for given address 194 * 195 * @return connection OR NULL, if not found 196 */ 197 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 198 btstack_linked_list_iterator_t it; 199 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 200 while (btstack_linked_list_iterator_has_next(&it)){ 201 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 202 if (connection->address_type != addr_type) continue; 203 if (memcmp(addr, connection->address, 6) != 0) continue; 204 return connection; 205 } 206 return NULL; 207 } 208 209 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 210 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 211 #ifdef HAVE_EMBEDDED_TICK 212 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 213 // connections might be timed out 214 hci_emit_l2cap_check_timeout(connection); 215 } 216 #else 217 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 218 // connections might be timed out 219 hci_emit_l2cap_check_timeout(connection); 220 } 221 #endif 222 } 223 224 static void hci_connection_timestamp(hci_connection_t *connection){ 225 #ifdef HAVE_EMBEDDED_TICK 226 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 227 #else 228 connection->timestamp = btstack_run_loop_get_time_ms(); 229 #endif 230 } 231 232 233 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 234 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 235 } 236 237 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 238 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 239 } 240 241 242 /** 243 * add authentication flags and reset timer 244 * @note: assumes classic connection 245 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 246 */ 247 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 248 bd_addr_t addr; 249 reverse_bd_addr(bd_addr, addr); 250 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 251 if (conn) { 252 connectionSetAuthenticationFlags(conn, flags); 253 hci_connection_timestamp(conn); 254 } 255 } 256 257 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 258 hci_connection_t * conn = hci_connection_for_handle(handle); 259 if (!conn) return 0; 260 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 261 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 262 return 0; 263 } 264 265 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 266 if (!hci_stack->link_key_db) return; 267 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 268 hci_stack->link_key_db->delete_link_key(addr); 269 } 270 271 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 272 if (!hci_stack->link_key_db) return; 273 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 274 hci_stack->link_key_db->put_link_key(addr, link_key, type); 275 } 276 277 static int hci_is_le_connection(hci_connection_t * connection){ 278 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 279 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 280 } 281 282 /** 283 * count connections 284 */ 285 static int nr_hci_connections(void){ 286 int count = 0; 287 btstack_linked_item_t *it; 288 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 289 return count; 290 } 291 292 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 293 294 int num_packets_sent_classic = 0; 295 int num_packets_sent_le = 0; 296 297 btstack_linked_item_t *it; 298 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 299 hci_connection_t * connection = (hci_connection_t *) it; 300 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 301 num_packets_sent_classic += connection->num_acl_packets_sent; 302 } else { 303 num_packets_sent_le += connection->num_acl_packets_sent; 304 } 305 } 306 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 307 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 308 int free_slots_le = 0; 309 310 if (free_slots_classic < 0){ 311 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 312 return 0; 313 } 314 315 if (hci_stack->le_acl_packets_total_num){ 316 // if we have LE slots, they are used 317 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 318 if (free_slots_le < 0){ 319 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 320 return 0; 321 } 322 } else { 323 // otherwise, classic slots are used for LE, too 324 free_slots_classic -= num_packets_sent_le; 325 if (free_slots_classic < 0){ 326 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 327 return 0; 328 } 329 } 330 331 switch (address_type){ 332 case BD_ADDR_TYPE_UNKNOWN: 333 log_error("hci_number_free_acl_slots: unknown address type"); 334 return 0; 335 336 case BD_ADDR_TYPE_CLASSIC: 337 return free_slots_classic; 338 339 default: 340 if (hci_stack->le_acl_packets_total_num){ 341 return free_slots_le; 342 } 343 return free_slots_classic; 344 } 345 } 346 347 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 348 // get connection type 349 hci_connection_t * connection = hci_connection_for_handle(con_handle); 350 if (!connection){ 351 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 352 return 0; 353 } 354 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 355 } 356 357 static int hci_number_free_sco_slots(void){ 358 int num_sco_packets_sent = 0; 359 btstack_linked_item_t *it; 360 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 361 hci_connection_t * connection = (hci_connection_t *) it; 362 num_sco_packets_sent += connection->num_sco_packets_sent; 363 } 364 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 365 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 366 return 0; 367 } 368 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 369 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 370 } 371 372 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 373 int hci_can_send_command_packet_now(void){ 374 if (hci_stack->hci_packet_buffer_reserved) return 0; 375 376 // check for async hci transport implementations 377 if (hci_stack->hci_transport->can_send_packet_now){ 378 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 379 return 0; 380 } 381 } 382 383 return hci_stack->num_cmd_packets > 0; 384 } 385 386 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 387 // check for async hci transport implementations 388 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 389 return hci_stack->hci_transport->can_send_packet_now(packet_type); 390 } 391 392 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 393 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 394 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 395 } 396 397 int hci_can_send_acl_classic_packet_now(void){ 398 if (hci_stack->hci_packet_buffer_reserved) return 0; 399 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 400 } 401 402 int hci_can_send_acl_le_packet_now(void){ 403 if (hci_stack->hci_packet_buffer_reserved) return 0; 404 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 405 } 406 407 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 408 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 409 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 410 } 411 412 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 413 if (hci_stack->hci_packet_buffer_reserved) return 0; 414 return hci_can_send_prepared_acl_packet_now(con_handle); 415 } 416 417 int hci_can_send_prepared_sco_packet_now(void){ 418 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 419 if (!hci_stack->synchronous_flow_control_enabled) return 1; 420 return hci_number_free_sco_slots() > 0; 421 } 422 423 int hci_can_send_sco_packet_now(void){ 424 if (hci_stack->hci_packet_buffer_reserved) return 0; 425 return hci_can_send_prepared_sco_packet_now(); 426 } 427 428 void hci_request_sco_can_send_now_event(void){ 429 hci_stack->sco_waiting_for_can_send_now = 1; 430 hci_notify_if_sco_can_send_now(); 431 } 432 433 // used for internal checks in l2cap.c 434 int hci_is_packet_buffer_reserved(void){ 435 return hci_stack->hci_packet_buffer_reserved; 436 } 437 438 // reserves outgoing packet buffer. @returns 1 if successful 439 int hci_reserve_packet_buffer(void){ 440 if (hci_stack->hci_packet_buffer_reserved) { 441 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 442 return 0; 443 } 444 hci_stack->hci_packet_buffer_reserved = 1; 445 return 1; 446 } 447 448 void hci_release_packet_buffer(void){ 449 hci_stack->hci_packet_buffer_reserved = 0; 450 } 451 452 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 453 static int hci_transport_synchronous(void){ 454 return hci_stack->hci_transport->can_send_packet_now == NULL; 455 } 456 457 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 458 459 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 460 461 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 462 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 463 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 464 max_acl_data_packet_length = hci_stack->le_data_packets_length; 465 } 466 467 // testing: reduce buffer to minimum 468 // max_acl_data_packet_length = 52; 469 470 log_debug("hci_send_acl_packet_fragments entered"); 471 472 int err; 473 // multiple packets could be send on a synchronous HCI transport 474 while (1){ 475 476 log_debug("hci_send_acl_packet_fragments loop entered"); 477 478 // get current data 479 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 480 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 481 int more_fragments = 0; 482 483 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 484 if (current_acl_data_packet_length > max_acl_data_packet_length){ 485 more_fragments = 1; 486 current_acl_data_packet_length = max_acl_data_packet_length; 487 } 488 489 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 490 if (acl_header_pos > 0){ 491 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 492 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 493 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 494 } 495 496 // update header len 497 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 498 499 // count packet 500 connection->num_acl_packets_sent++; 501 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %u)", more_fragments); 502 503 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 504 if (more_fragments){ 505 // update start of next fragment to send 506 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 507 } else { 508 // done 509 hci_stack->acl_fragmentation_pos = 0; 510 hci_stack->acl_fragmentation_total_size = 0; 511 } 512 513 // send packet 514 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 515 const int size = current_acl_data_packet_length + 4; 516 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 517 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 518 519 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %u)", more_fragments); 520 521 // done yet? 522 if (!more_fragments) break; 523 524 // can send more? 525 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 526 } 527 528 log_debug("hci_send_acl_packet_fragments loop over"); 529 530 // release buffer now for synchronous transport 531 if (hci_transport_synchronous()){ 532 hci_release_packet_buffer(); 533 // notify upper stack that it might be possible to send again 534 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 535 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 536 } 537 538 return err; 539 } 540 541 // pre: caller has reserved the packet buffer 542 int hci_send_acl_packet_buffer(int size){ 543 544 // log_info("hci_send_acl_packet_buffer size %u", size); 545 546 if (!hci_stack->hci_packet_buffer_reserved) { 547 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 548 return 0; 549 } 550 551 uint8_t * packet = hci_stack->hci_packet_buffer; 552 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 553 554 // check for free places on Bluetooth module 555 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 556 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 557 hci_release_packet_buffer(); 558 return BTSTACK_ACL_BUFFERS_FULL; 559 } 560 561 hci_connection_t *connection = hci_connection_for_handle( con_handle); 562 if (!connection) { 563 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 564 hci_release_packet_buffer(); 565 return 0; 566 } 567 hci_connection_timestamp(connection); 568 569 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 570 571 // setup data 572 hci_stack->acl_fragmentation_total_size = size; 573 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 574 575 return hci_send_acl_packet_fragments(connection); 576 } 577 578 // pre: caller has reserved the packet buffer 579 int hci_send_sco_packet_buffer(int size){ 580 581 // log_info("hci_send_acl_packet_buffer size %u", size); 582 583 if (!hci_stack->hci_packet_buffer_reserved) { 584 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 585 return 0; 586 } 587 588 uint8_t * packet = hci_stack->hci_packet_buffer; 589 590 // skip checks in loopback mode 591 if (!hci_stack->loopback_mode){ 592 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 593 594 // check for free places on Bluetooth module 595 if (!hci_can_send_prepared_sco_packet_now()) { 596 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 597 hci_release_packet_buffer(); 598 return BTSTACK_ACL_BUFFERS_FULL; 599 } 600 601 // track send packet in connection struct 602 hci_connection_t *connection = hci_connection_for_handle( con_handle); 603 if (!connection) { 604 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 605 hci_release_packet_buffer(); 606 return 0; 607 } 608 connection->num_sco_packets_sent++; 609 } 610 611 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 612 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 613 614 if (hci_transport_synchronous()){ 615 hci_release_packet_buffer(); 616 // notify upper stack that it might be possible to send again 617 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 618 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 619 } 620 621 return err; 622 } 623 624 static void acl_handler(uint8_t *packet, int size){ 625 626 // log_info("acl_handler: size %u", size); 627 628 // get info 629 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 630 hci_connection_t *conn = hci_connection_for_handle(con_handle); 631 uint8_t acl_flags = READ_ACL_FLAGS(packet); 632 uint16_t acl_length = READ_ACL_LENGTH(packet); 633 634 // ignore non-registered handle 635 if (!conn){ 636 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 637 return; 638 } 639 640 // assert packet is complete 641 if (acl_length + 4 != size){ 642 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 643 return; 644 } 645 646 // update idle timestamp 647 hci_connection_timestamp(conn); 648 649 // handle different packet types 650 switch (acl_flags & 0x03) { 651 652 case 0x01: // continuation fragment 653 654 // sanity checks 655 if (conn->acl_recombination_pos == 0) { 656 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 657 return; 658 } 659 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 660 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 661 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 662 conn->acl_recombination_pos = 0; 663 return; 664 } 665 666 // append fragment payload (header already stored) 667 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 668 conn->acl_recombination_pos += acl_length; 669 670 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 671 // conn->acl_recombination_pos, conn->acl_recombination_length); 672 673 // forward complete L2CAP packet if complete. 674 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 675 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 676 // reset recombination buffer 677 conn->acl_recombination_length = 0; 678 conn->acl_recombination_pos = 0; 679 } 680 break; 681 682 case 0x02: { // first fragment 683 684 // sanity check 685 if (conn->acl_recombination_pos) { 686 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 687 conn->acl_recombination_pos = 0; 688 } 689 690 // peek into L2CAP packet! 691 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 692 693 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 694 695 // compare fragment size to L2CAP packet size 696 if (acl_length >= l2cap_length + 4){ 697 // forward fragment as L2CAP packet 698 hci_emit_acl_packet(packet, acl_length + 4); 699 } else { 700 701 if (acl_length > HCI_ACL_BUFFER_SIZE){ 702 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 703 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 704 return; 705 } 706 707 // store first fragment and tweak acl length for complete package 708 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 709 conn->acl_recombination_pos = acl_length + 4; 710 conn->acl_recombination_length = l2cap_length; 711 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 712 } 713 break; 714 715 } 716 default: 717 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 718 return; 719 } 720 721 // execute main loop 722 hci_run(); 723 } 724 725 static void hci_shutdown_connection(hci_connection_t *conn){ 726 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 727 728 btstack_run_loop_remove_timer(&conn->timeout); 729 730 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 731 btstack_memory_hci_connection_free( conn ); 732 733 // now it's gone 734 hci_emit_nr_connections_changed(); 735 } 736 737 static const uint16_t packet_type_sizes[] = { 738 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 739 HCI_ACL_DH1_SIZE, 0, 0, 0, 740 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 741 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 742 }; 743 static const uint8_t packet_type_feature_requirement_bit[] = { 744 0, // 3 slot packets 745 1, // 5 slot packets 746 25, // EDR 2 mpbs 747 26, // EDR 3 mbps 748 39, // 3 slot EDR packts 749 40, // 5 slot EDR packet 750 }; 751 static const uint16_t packet_type_feature_packet_mask[] = { 752 0x0f00, // 3 slot packets 753 0xf000, // 5 slot packets 754 0x1102, // EDR 2 mpbs 755 0x2204, // EDR 3 mbps 756 0x0300, // 3 slot EDR packts 757 0x3000, // 5 slot EDR packet 758 }; 759 760 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 761 // enable packet types based on size 762 uint16_t packet_types = 0; 763 unsigned int i; 764 for (i=0;i<16;i++){ 765 if (packet_type_sizes[i] == 0) continue; 766 if (packet_type_sizes[i] <= buffer_size){ 767 packet_types |= 1 << i; 768 } 769 } 770 // disable packet types due to missing local supported features 771 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 772 int bit_idx = packet_type_feature_requirement_bit[i]; 773 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 774 if (feature_set) continue; 775 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 776 packet_types &= ~packet_type_feature_packet_mask[i]; 777 } 778 // flip bits for "may not be used" 779 packet_types ^= 0x3306; 780 return packet_types; 781 } 782 783 uint16_t hci_usable_acl_packet_types(void){ 784 return hci_stack->packet_types; 785 } 786 787 uint8_t* hci_get_outgoing_packet_buffer(void){ 788 // hci packet buffer is >= acl data packet length 789 return hci_stack->hci_packet_buffer; 790 } 791 792 uint16_t hci_max_acl_data_packet_length(void){ 793 return hci_stack->acl_data_packet_length; 794 } 795 796 int hci_extended_sco_link_supported(void){ 797 // No. 31, byte 3, bit 7 798 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 799 } 800 801 int hci_non_flushable_packet_boundary_flag_supported(void){ 802 // No. 54, byte 6, bit 6 803 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 804 } 805 806 static int gap_ssp_supported(void){ 807 // No. 51, byte 6, bit 3 808 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 809 } 810 811 static int hci_classic_supported(void){ 812 // No. 37, byte 4, bit 5, = No BR/EDR Support 813 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 814 } 815 816 static int hci_le_supported(void){ 817 #ifdef ENABLE_BLE 818 // No. 37, byte 4, bit 6 = LE Supported (Controller) 819 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 820 #else 821 return 0; 822 #endif 823 } 824 825 // get addr type and address used in advertisement packets 826 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 827 *addr_type = hci_stack->adv_addr_type; 828 if (hci_stack->adv_addr_type){ 829 memcpy(addr, hci_stack->adv_address, 6); 830 } else { 831 memcpy(addr, hci_stack->local_bd_addr, 6); 832 } 833 } 834 835 #ifdef ENABLE_BLE 836 void le_handle_advertisement_report(uint8_t *packet, int size){ 837 int offset = 3; 838 int num_reports = packet[offset]; 839 offset += 1; 840 841 int i; 842 // log_info("HCI: handle adv report with num reports: %d", num_reports); 843 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 844 for (i=0; i<num_reports;i++){ 845 uint8_t data_length = packet[offset + 8]; 846 uint8_t event_size = 10 + data_length; 847 int pos = 0; 848 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 849 event[pos++] = event_size; 850 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 851 offset += 8; 852 pos += 8; 853 event[pos++] = packet[offset + 1 + data_length]; // rssi 854 event[pos++] = packet[offset++]; //data_length; 855 memcpy(&event[pos], &packet[offset], data_length); 856 pos += data_length; 857 offset += data_length + 1; // rssi 858 hci_emit_event(event, pos, 1); 859 } 860 } 861 #endif 862 863 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 864 if (!hci_stack->config) return 0; 865 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 866 // Limit baud rate for Broadcom chipsets to 3 mbps 867 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 868 baud_rate = 3000000; 869 } 870 return baud_rate; 871 } 872 873 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 874 switch (hci_stack->substate){ 875 case HCI_INIT_W4_SEND_RESET: 876 log_info("Resend HCI Reset"); 877 hci_stack->substate = HCI_INIT_SEND_RESET; 878 hci_stack->num_cmd_packets = 1; 879 hci_run(); 880 break; 881 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 882 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 883 if (hci_stack->hci_transport->reset_link){ 884 hci_stack->hci_transport->reset_link(); 885 } 886 // NOTE: explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 887 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 888 log_info("Resend HCI Reset - CSR Warm Boot"); 889 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 890 hci_stack->num_cmd_packets = 1; 891 hci_run(); 892 break; 893 case HCI_INIT_W4_SEND_BAUD_CHANGE: 894 if (hci_stack->hci_transport->set_baudrate){ 895 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 896 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 897 hci_stack->hci_transport->set_baudrate(baud_rate); 898 } 899 // For CSR, HCI Reset is sent on new baud rate 900 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 901 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 902 hci_run(); 903 } 904 break; 905 default: 906 break; 907 } 908 } 909 910 static void hci_initializing_next_state(void){ 911 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 912 } 913 914 // assumption: hci_can_send_command_packet_now() == true 915 static void hci_initializing_run(void){ 916 log_info("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 917 switch (hci_stack->substate){ 918 case HCI_INIT_SEND_RESET: 919 hci_state_reset(); 920 921 #ifndef HAVE_PLATFORM_IPHONE_OS 922 // prepare reset if command complete not received in 100ms 923 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 924 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 925 btstack_run_loop_add_timer(&hci_stack->timeout); 926 #endif 927 // send command 928 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 929 hci_send_cmd(&hci_reset); 930 break; 931 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 932 hci_send_cmd(&hci_read_local_version_information); 933 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 934 break; 935 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 936 hci_state_reset(); 937 // prepare reset if command complete not received in 100ms 938 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 939 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 940 btstack_run_loop_add_timer(&hci_stack->timeout); 941 // send command 942 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 943 hci_send_cmd(&hci_reset); 944 break; 945 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 946 hci_state_reset(); 947 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 948 hci_send_cmd(&hci_reset); 949 break; 950 case HCI_INIT_SEND_BAUD_CHANGE: { 951 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 952 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 953 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 954 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 955 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 956 // STLC25000D: baudrate change happens within 0.5 s after command was send, 957 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 958 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 959 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 960 btstack_run_loop_add_timer(&hci_stack->timeout); 961 } 962 break; 963 } 964 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 965 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 966 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 967 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 968 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 969 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 970 break; 971 } 972 case HCI_INIT_CUSTOM_INIT: 973 log_info("Custom init"); 974 // Custom initialization 975 if (hci_stack->chipset && hci_stack->chipset->next_command){ 976 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 977 if (valid_cmd){ 978 int size = 3 + hci_stack->hci_packet_buffer[2]; 979 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 980 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 981 switch (valid_cmd) { 982 case 1: 983 default: 984 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 985 break; 986 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 987 log_info("CSR Warm Boot"); 988 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 989 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 990 btstack_run_loop_add_timer(&hci_stack->timeout); 991 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 992 && hci_stack->config 993 && hci_stack->chipset 994 // && hci_stack->chipset->set_baudrate_command -- there's no such command 995 && hci_stack->hci_transport->set_baudrate 996 && hci_transport_uart_get_main_baud_rate()){ 997 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 998 } else { 999 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1000 } 1001 break; 1002 } 1003 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1004 break; 1005 } 1006 log_info("hci_run: init script done"); 1007 1008 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1009 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1010 int need_baud_change = hci_stack->config 1011 && hci_stack->chipset 1012 && hci_stack->chipset->set_baudrate_command 1013 && hci_stack->hci_transport->set_baudrate 1014 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1015 if (need_baud_change) { 1016 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1017 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1018 hci_stack->hci_transport->set_baudrate(baud_rate); 1019 } 1020 } 1021 } 1022 // otherwise continue 1023 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1024 hci_send_cmd(&hci_read_local_supported_commands); 1025 break; 1026 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1027 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1028 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1029 hci_send_cmd(&hci_read_local_supported_commands); 1030 break; 1031 case HCI_INIT_SET_BD_ADDR: 1032 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1033 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1034 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1035 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1036 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1037 break; 1038 case HCI_INIT_READ_BD_ADDR: 1039 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1040 hci_send_cmd(&hci_read_bd_addr); 1041 break; 1042 case HCI_INIT_READ_BUFFER_SIZE: 1043 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1044 hci_send_cmd(&hci_read_buffer_size); 1045 break; 1046 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1047 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1048 hci_send_cmd(&hci_read_local_supported_features); 1049 break; 1050 case HCI_INIT_SET_EVENT_MASK: 1051 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1052 if (hci_le_supported()){ 1053 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1054 } else { 1055 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1056 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1057 } 1058 break; 1059 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1060 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1061 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1062 break; 1063 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1064 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1065 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1066 break; 1067 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1068 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1069 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1070 break; 1071 case HCI_INIT_WRITE_LOCAL_NAME: 1072 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1073 if (hci_stack->local_name){ 1074 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1075 } else { 1076 char local_name[8+17+1]; 1077 // BTstack 11:22:33:44:55:66 1078 memcpy(local_name, "BTstack ", 8); 1079 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1080 local_name[8+17] = '\0'; 1081 log_info("---> Name %s", local_name); 1082 hci_send_cmd(&hci_write_local_name, local_name); 1083 } 1084 break; 1085 case HCI_INIT_WRITE_INQUIRY_MODE: 1086 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1087 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1088 break; 1089 case HCI_INIT_WRITE_SCAN_ENABLE: 1090 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1091 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1092 break; 1093 // only sent if ENABLE_SCO_OVER_HCI is defined 1094 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1095 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1096 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1097 break; 1098 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1099 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1100 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1101 break; 1102 #ifdef ENABLE_BLE 1103 // LE INIT 1104 case HCI_INIT_LE_READ_BUFFER_SIZE: 1105 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1106 hci_send_cmd(&hci_le_read_buffer_size); 1107 break; 1108 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1109 // LE Supported Host = 1, Simultaneous Host = 0 1110 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1111 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1112 break; 1113 case HCI_INIT_READ_WHITE_LIST_SIZE: 1114 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1115 hci_send_cmd(&hci_le_read_white_list_size); 1116 break; 1117 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1118 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1119 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1120 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1121 break; 1122 #endif 1123 default: 1124 return; 1125 } 1126 } 1127 1128 static void hci_init_done(void){ 1129 // done. tell the app 1130 log_info("hci_init_done -> HCI_STATE_WORKING"); 1131 hci_stack->state = HCI_STATE_WORKING; 1132 hci_emit_state(); 1133 hci_run(); 1134 } 1135 1136 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1137 uint8_t command_completed = 0; 1138 1139 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1140 uint16_t opcode = little_endian_read_16(packet,3); 1141 if (opcode == hci_stack->last_cmd_opcode){ 1142 command_completed = 1; 1143 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1144 } else { 1145 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1146 } 1147 } 1148 1149 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1150 uint8_t status = packet[2]; 1151 uint16_t opcode = little_endian_read_16(packet,4); 1152 if (opcode == hci_stack->last_cmd_opcode){ 1153 if (status){ 1154 command_completed = 1; 1155 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1156 } else { 1157 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1158 } 1159 } else { 1160 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1161 } 1162 } 1163 1164 // Vendor == CSR 1165 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1166 // TODO: track actual command 1167 command_completed = 1; 1168 } 1169 1170 // Vendor == Toshiba 1171 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1172 // TODO: track actual command 1173 command_completed = 1; 1174 } 1175 1176 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1177 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1178 // 1179 // HCI Reset 1180 // Timeout 100 ms 1181 // HCI Reset 1182 // Command Complete Reset 1183 // HCI Read Local Version Information 1184 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1185 // hang... 1186 // 1187 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1188 if (!command_completed 1189 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1190 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1191 1192 uint16_t opcode = little_endian_read_16(packet,3); 1193 if (opcode == hci_reset.opcode){ 1194 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1195 return; 1196 } 1197 } 1198 1199 // CSR & H5 1200 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1201 if (!command_completed 1202 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1203 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1204 1205 uint16_t opcode = little_endian_read_16(packet,3); 1206 if (opcode == hci_reset.opcode){ 1207 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1208 return; 1209 } 1210 } 1211 1212 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1213 // fix: Correct substate and behave as command below 1214 if (command_completed){ 1215 switch (hci_stack->substate){ 1216 case HCI_INIT_SEND_RESET: 1217 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1218 break; 1219 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1220 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1221 break; 1222 default: 1223 break; 1224 } 1225 } 1226 1227 1228 if (!command_completed) return; 1229 1230 int need_baud_change = hci_stack->config 1231 && hci_stack->chipset 1232 && hci_stack->chipset->set_baudrate_command 1233 && hci_stack->hci_transport->set_baudrate 1234 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1235 1236 int need_addr_change = hci_stack->custom_bd_addr_set 1237 && hci_stack->chipset 1238 && hci_stack->chipset->set_bd_addr_command; 1239 1240 switch(hci_stack->substate){ 1241 case HCI_INIT_SEND_RESET: 1242 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1243 // fix: just correct substate and behave as command below 1244 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1245 btstack_run_loop_remove_timer(&hci_stack->timeout); 1246 break; 1247 case HCI_INIT_W4_SEND_RESET: 1248 btstack_run_loop_remove_timer(&hci_stack->timeout); 1249 break; 1250 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1251 log_info("Received local version info, need baud change %u", need_baud_change); 1252 if (need_baud_change){ 1253 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1254 return; 1255 } 1256 // skip baud change 1257 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1258 return; 1259 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1260 // for STLC2500D, baud rate change already happened. 1261 // for others, baud rate gets changed now 1262 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1263 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1264 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1265 hci_stack->hci_transport->set_baudrate(baud_rate); 1266 } 1267 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1268 return; 1269 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1270 btstack_run_loop_remove_timer(&hci_stack->timeout); 1271 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1272 return; 1273 case HCI_INIT_W4_CUSTOM_INIT: 1274 // repeat custom init 1275 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1276 return; 1277 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1278 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1279 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1280 return; 1281 } 1282 if (need_addr_change){ 1283 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1284 return; 1285 } 1286 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1287 return; 1288 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1289 if (need_baud_change){ 1290 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1291 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1292 hci_stack->hci_transport->set_baudrate(baud_rate); 1293 } 1294 if (need_addr_change){ 1295 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1296 return; 1297 } 1298 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1299 return; 1300 case HCI_INIT_W4_SET_BD_ADDR: 1301 // for STLC2500D, bd addr change only gets active after sending reset command 1302 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1303 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1304 return; 1305 } 1306 // skipping st warm boot 1307 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1308 return; 1309 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1310 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1311 return; 1312 case HCI_INIT_W4_READ_BD_ADDR: 1313 // only read buffer size if supported 1314 if (hci_stack->local_supported_commands[0] & 0x01) { 1315 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1316 return; 1317 } 1318 // skipping read buffer size 1319 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1320 return; 1321 case HCI_INIT_W4_SET_EVENT_MASK: 1322 // skip Classic init commands for LE only chipsets 1323 if (!hci_classic_supported()){ 1324 if (hci_le_supported()){ 1325 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1326 return; 1327 } else { 1328 log_error("Neither BR/EDR nor LE supported"); 1329 hci_init_done(); 1330 return; 1331 } 1332 } 1333 if (!gap_ssp_supported()){ 1334 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1335 return; 1336 } 1337 break; 1338 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1339 break; 1340 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1341 // skip write le host if not supported (e.g. on LE only EM9301) 1342 if (hci_stack->local_supported_commands[0] & 0x02) break; 1343 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1344 return; 1345 1346 #ifdef ENABLE_SCO_OVER_HCI 1347 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1348 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1349 break; 1350 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1351 if (!hci_le_supported()){ 1352 // SKIP LE init for Classic only configuration 1353 hci_init_done(); 1354 return; 1355 } 1356 break; 1357 #else 1358 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1359 if (!hci_le_supported()){ 1360 // SKIP LE init for Classic only configuration 1361 hci_init_done(); 1362 return; 1363 } 1364 #endif 1365 break; 1366 // Response to command before init done state -> init done 1367 case (HCI_INIT_DONE-1): 1368 hci_init_done(); 1369 return; 1370 1371 default: 1372 break; 1373 } 1374 hci_initializing_next_state(); 1375 } 1376 1377 static void event_handler(uint8_t *packet, int size){ 1378 1379 uint16_t event_length = packet[1]; 1380 1381 // assert packet is complete 1382 if (size != event_length + 2){ 1383 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1384 return; 1385 } 1386 1387 bd_addr_t addr; 1388 bd_addr_type_t addr_type; 1389 uint8_t link_type; 1390 hci_con_handle_t handle; 1391 hci_connection_t * conn; 1392 int i; 1393 1394 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1395 1396 switch (hci_event_packet_get_type(packet)) { 1397 1398 case HCI_EVENT_COMMAND_COMPLETE: 1399 // get num cmd packets 1400 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1401 hci_stack->num_cmd_packets = packet[2]; 1402 1403 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1404 // from offset 5 1405 // status 1406 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1407 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1408 hci_stack->sco_data_packet_length = packet[8]; 1409 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1410 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1411 1412 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1413 // determine usable ACL payload size 1414 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1415 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1416 } 1417 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1418 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1419 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1420 } 1421 } 1422 #ifdef ENABLE_BLE 1423 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1424 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1425 hci_stack->le_acl_packets_total_num = packet[8]; 1426 // determine usable ACL payload size 1427 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1428 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1429 } 1430 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1431 } 1432 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1433 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1434 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1435 } 1436 #endif 1437 // Dump local address 1438 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1439 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1440 hci_stack->local_bd_addr); 1441 log_info("Local Address, Status: 0x%02x: Addr: %s", 1442 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1443 if (hci_stack->link_key_db){ 1444 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1445 } 1446 } 1447 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1448 hci_emit_discoverable_enabled(hci_stack->discoverable); 1449 } 1450 // Note: HCI init checks 1451 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1452 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1453 1454 // determine usable ACL packet types based on host buffer size and supported features 1455 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1456 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1457 1458 // Classic/LE 1459 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1460 } 1461 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1462 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1463 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1464 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1465 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1466 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1467 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1468 // notify app 1469 if (hci_stack->local_version_information_callback){ 1470 hci_stack->local_version_information_callback(packet); 1471 } 1472 } 1473 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1474 hci_stack->local_supported_commands[0] = 1475 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1476 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1477 } 1478 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1479 if (packet[5] == 0){ 1480 hci_stack->synchronous_flow_control_enabled = 1; 1481 } 1482 } 1483 break; 1484 1485 case HCI_EVENT_COMMAND_STATUS: 1486 // get num cmd packets 1487 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1488 hci_stack->num_cmd_packets = packet[3]; 1489 break; 1490 1491 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1492 int offset = 3; 1493 for (i=0; i<packet[2];i++){ 1494 handle = little_endian_read_16(packet, offset); 1495 offset += 2; 1496 uint16_t num_packets = little_endian_read_16(packet, offset); 1497 offset += 2; 1498 1499 conn = hci_connection_for_handle(handle); 1500 if (!conn){ 1501 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1502 continue; 1503 } 1504 1505 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1506 if (conn->num_sco_packets_sent >= num_packets){ 1507 conn->num_sco_packets_sent -= num_packets; 1508 } else { 1509 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1510 conn->num_sco_packets_sent = 0; 1511 } 1512 hci_notify_if_sco_can_send_now(); 1513 } else { 1514 if (conn->num_acl_packets_sent >= num_packets){ 1515 conn->num_acl_packets_sent -= num_packets; 1516 } else { 1517 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1518 conn->num_acl_packets_sent = 0; 1519 } 1520 } 1521 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1522 } 1523 break; 1524 } 1525 case HCI_EVENT_CONNECTION_REQUEST: 1526 reverse_bd_addr(&packet[2], addr); 1527 // TODO: eval COD 8-10 1528 link_type = packet[11]; 1529 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1530 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1531 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1532 if (!conn) { 1533 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1534 } 1535 if (!conn) { 1536 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1537 hci_stack->decline_reason = 0x0d; 1538 bd_addr_copy(hci_stack->decline_addr, addr); 1539 break; 1540 } 1541 conn->role = HCI_ROLE_SLAVE; 1542 conn->state = RECEIVED_CONNECTION_REQUEST; 1543 // store info about eSCO 1544 if (link_type == 0x02){ 1545 conn->remote_supported_feature_eSCO = 1; 1546 } 1547 hci_run(); 1548 break; 1549 1550 case HCI_EVENT_CONNECTION_COMPLETE: 1551 // Connection management 1552 reverse_bd_addr(&packet[5], addr); 1553 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1554 addr_type = BD_ADDR_TYPE_CLASSIC; 1555 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1556 if (conn) { 1557 if (!packet[2]){ 1558 conn->state = OPEN; 1559 conn->con_handle = little_endian_read_16(packet, 3); 1560 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1561 1562 // restart timer 1563 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1564 btstack_run_loop_add_timer(&conn->timeout); 1565 1566 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1567 1568 hci_emit_nr_connections_changed(); 1569 } else { 1570 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1571 uint8_t status = packet[2]; 1572 bd_addr_t bd_address; 1573 memcpy(&bd_address, conn->address, 6); 1574 1575 // connection failed, remove entry 1576 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1577 btstack_memory_hci_connection_free( conn ); 1578 1579 // notify client if dedicated bonding 1580 if (notify_dedicated_bonding_failed){ 1581 log_info("hci notify_dedicated_bonding_failed"); 1582 hci_emit_dedicated_bonding_result(bd_address, status); 1583 } 1584 1585 // if authentication error, also delete link key 1586 if (packet[2] == 0x05) { 1587 gap_drop_link_key_for_bd_addr(addr); 1588 } 1589 } 1590 } 1591 break; 1592 1593 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1594 reverse_bd_addr(&packet[5], addr); 1595 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1596 if (packet[2]){ 1597 // connection failed 1598 break; 1599 } 1600 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1601 if (!conn) { 1602 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1603 } 1604 if (!conn) { 1605 break; 1606 } 1607 conn->state = OPEN; 1608 conn->con_handle = little_endian_read_16(packet, 3); 1609 break; 1610 1611 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1612 handle = little_endian_read_16(packet, 3); 1613 conn = hci_connection_for_handle(handle); 1614 if (!conn) break; 1615 if (!packet[2]){ 1616 uint8_t * features = &packet[5]; 1617 if (features[6] & (1 << 3)){ 1618 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1619 } 1620 if (features[3] & (1<<7)){ 1621 conn->remote_supported_feature_eSCO = 1; 1622 } 1623 } 1624 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1625 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1626 if (conn->bonding_flags & BONDING_DEDICATED){ 1627 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1628 } 1629 break; 1630 1631 case HCI_EVENT_LINK_KEY_REQUEST: 1632 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1633 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1634 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1635 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1636 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1637 hci_run(); 1638 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1639 return; 1640 1641 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1642 reverse_bd_addr(&packet[2], addr); 1643 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1644 if (!conn) break; 1645 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1646 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1647 // Change Connection Encryption keeps link key type 1648 if (link_key_type != CHANGED_COMBINATION_KEY){ 1649 conn->link_key_type = link_key_type; 1650 } 1651 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1652 // still forward event to allow dismiss of pairing dialog 1653 break; 1654 } 1655 1656 case HCI_EVENT_PIN_CODE_REQUEST: 1657 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1658 // non-bondable mode: pin code negative reply will be sent 1659 if (!hci_stack->bondable){ 1660 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1661 hci_run(); 1662 return; 1663 } 1664 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1665 if (!hci_stack->link_key_db) break; 1666 hci_event_pin_code_request_get_bd_addr(packet, addr); 1667 hci_stack->link_key_db->delete_link_key(addr); 1668 break; 1669 1670 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1671 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1672 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1673 break; 1674 1675 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1676 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1677 if (!hci_stack->ssp_auto_accept) break; 1678 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1679 break; 1680 1681 case HCI_EVENT_USER_PASSKEY_REQUEST: 1682 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1683 if (!hci_stack->ssp_auto_accept) break; 1684 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1685 break; 1686 1687 case HCI_EVENT_ENCRYPTION_CHANGE: 1688 handle = little_endian_read_16(packet, 3); 1689 conn = hci_connection_for_handle(handle); 1690 if (!conn) break; 1691 if (packet[2] == 0) { 1692 if (packet[5]){ 1693 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1694 } else { 1695 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1696 } 1697 } 1698 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1699 break; 1700 1701 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1702 handle = little_endian_read_16(packet, 3); 1703 conn = hci_connection_for_handle(handle); 1704 if (!conn) break; 1705 1706 // dedicated bonding: send result and disconnect 1707 if (conn->bonding_flags & BONDING_DEDICATED){ 1708 conn->bonding_flags &= ~BONDING_DEDICATED; 1709 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1710 conn->bonding_status = packet[2]; 1711 break; 1712 } 1713 1714 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1715 // link key sufficient for requested security 1716 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1717 break; 1718 } 1719 // not enough 1720 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1721 break; 1722 1723 // HCI_EVENT_DISCONNECTION_COMPLETE 1724 // has been split, to first notify stack before shutting connection down 1725 // see end of function, too. 1726 case HCI_EVENT_DISCONNECTION_COMPLETE: 1727 if (packet[2]) break; // status != 0 1728 handle = little_endian_read_16(packet, 3); 1729 // drop outgoing ACL fragments if it is for closed connection 1730 if (hci_stack->acl_fragmentation_total_size > 0) { 1731 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1732 log_info("hci: drop fragmented ACL data for closed connection"); 1733 hci_stack->acl_fragmentation_total_size = 0; 1734 hci_stack->acl_fragmentation_pos = 0; 1735 } 1736 } 1737 // re-enable advertisements for le connections if active 1738 conn = hci_connection_for_handle(handle); 1739 if (!conn) break; 1740 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1741 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1742 } 1743 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1744 break; 1745 1746 case HCI_EVENT_HARDWARE_ERROR: 1747 log_error("Hardware Error: 0x%02x", packet[2]); 1748 if (hci_stack->hardware_error_callback){ 1749 (*hci_stack->hardware_error_callback)(packet[2]); 1750 } else { 1751 // if no special requests, just reboot stack 1752 hci_power_control_off(); 1753 hci_power_control_on(); 1754 } 1755 break; 1756 1757 case HCI_EVENT_ROLE_CHANGE: 1758 if (packet[2]) break; // status != 0 1759 handle = little_endian_read_16(packet, 3); 1760 conn = hci_connection_for_handle(handle); 1761 if (!conn) break; // no conn 1762 conn->role = packet[9]; 1763 break; 1764 1765 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1766 // release packet buffer only for asynchronous transport and if there are not further fragements 1767 if (hci_transport_synchronous()) { 1768 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1769 return; // instead of break: to avoid re-entering hci_run() 1770 } 1771 if (hci_stack->acl_fragmentation_total_size) break; 1772 hci_release_packet_buffer(); 1773 1774 // L2CAP receives this event via the hci_emit_event below 1775 1776 // For SCO, we do the can_send_now_check here 1777 hci_notify_if_sco_can_send_now(); 1778 break; 1779 1780 case HCI_EVENT_SCO_CAN_SEND_NOW: 1781 // For SCO, we do the can_send_now_check here 1782 hci_notify_if_sco_can_send_now(); 1783 return; 1784 1785 #ifdef ENABLE_BLE 1786 case HCI_EVENT_LE_META: 1787 switch (packet[2]){ 1788 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1789 // log_info("advertising report received"); 1790 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1791 le_handle_advertisement_report(packet, size); 1792 break; 1793 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1794 // Connection management 1795 reverse_bd_addr(&packet[8], addr); 1796 addr_type = (bd_addr_type_t)packet[7]; 1797 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1798 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1799 // if auto-connect, remove from whitelist in both roles 1800 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1801 hci_remove_from_whitelist(addr_type, addr); 1802 } 1803 // handle error: error is reported only to the initiator -> outgoing connection 1804 if (packet[3]){ 1805 // outgoing connection establishment is done 1806 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1807 // remove entry 1808 if (conn){ 1809 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1810 btstack_memory_hci_connection_free( conn ); 1811 } 1812 break; 1813 } 1814 // on success, both hosts receive connection complete event 1815 if (packet[6] == HCI_ROLE_MASTER){ 1816 // if we're master, it was an outgoing connection and we're done with it 1817 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1818 } else { 1819 // if we're slave, it was an incoming connection, advertisements have stopped 1820 hci_stack->le_advertisements_active = 0; 1821 } 1822 // LE connections are auto-accepted, so just create a connection if there isn't one already 1823 if (!conn){ 1824 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1825 } 1826 // no memory, sorry. 1827 if (!conn){ 1828 break; 1829 } 1830 1831 conn->state = OPEN; 1832 conn->role = packet[6]; 1833 conn->con_handle = little_endian_read_16(packet, 4); 1834 1835 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1836 1837 // restart timer 1838 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1839 // btstack_run_loop_add_timer(&conn->timeout); 1840 1841 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1842 1843 hci_emit_nr_connections_changed(); 1844 break; 1845 1846 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1847 1848 default: 1849 break; 1850 } 1851 break; 1852 #endif 1853 default: 1854 break; 1855 } 1856 1857 // handle BT initialization 1858 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1859 hci_initializing_event_handler(packet, size); 1860 } 1861 1862 // help with BT sleep 1863 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1864 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1865 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1866 hci_initializing_next_state(); 1867 } 1868 1869 // notify upper stack 1870 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1871 1872 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1873 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1874 if (!packet[2]){ 1875 handle = little_endian_read_16(packet, 3); 1876 hci_connection_t * aConn = hci_connection_for_handle(handle); 1877 if (aConn) { 1878 uint8_t status = aConn->bonding_status; 1879 uint16_t flags = aConn->bonding_flags; 1880 bd_addr_t bd_address; 1881 memcpy(&bd_address, aConn->address, 6); 1882 hci_shutdown_connection(aConn); 1883 // connection struct is gone, don't access anymore 1884 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1885 hci_emit_dedicated_bonding_result(bd_address, status); 1886 } 1887 } 1888 } 1889 } 1890 1891 // execute main loop 1892 hci_run(); 1893 } 1894 1895 static void sco_handler(uint8_t * packet, uint16_t size){ 1896 if (!hci_stack->sco_packet_handler) return; 1897 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1898 } 1899 1900 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1901 hci_dump_packet(packet_type, 1, packet, size); 1902 switch (packet_type) { 1903 case HCI_EVENT_PACKET: 1904 event_handler(packet, size); 1905 break; 1906 case HCI_ACL_DATA_PACKET: 1907 acl_handler(packet, size); 1908 break; 1909 case HCI_SCO_DATA_PACKET: 1910 sco_handler(packet, size); 1911 default: 1912 break; 1913 } 1914 } 1915 1916 /** 1917 * @brief Add event packet handler. 1918 */ 1919 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1920 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1921 } 1922 1923 1924 /** Register HCI packet handlers */ 1925 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 1926 hci_stack->acl_packet_handler = handler; 1927 } 1928 1929 /** 1930 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1931 */ 1932 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 1933 hci_stack->sco_packet_handler = handler; 1934 } 1935 1936 static void hci_state_reset(void){ 1937 // no connections yet 1938 hci_stack->connections = NULL; 1939 1940 // keep discoverable/connectable as this has been requested by the client(s) 1941 // hci_stack->discoverable = 0; 1942 // hci_stack->connectable = 0; 1943 // hci_stack->bondable = 1; 1944 1945 // buffer is free 1946 hci_stack->hci_packet_buffer_reserved = 0; 1947 1948 // no pending cmds 1949 hci_stack->decline_reason = 0; 1950 hci_stack->new_scan_enable_value = 0xff; 1951 1952 // LE 1953 hci_stack->adv_addr_type = 0; 1954 memset(hci_stack->adv_address, 0, 6); 1955 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1956 hci_stack->le_scan_type = 0xff; 1957 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1958 hci_stack->le_whitelist = 0; 1959 hci_stack->le_whitelist_capacity = 0; 1960 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1961 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1962 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1963 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1964 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1965 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1966 } 1967 1968 /** 1969 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1970 */ 1971 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1972 // store and open remote device db 1973 hci_stack->link_key_db = link_key_db; 1974 if (hci_stack->link_key_db) { 1975 hci_stack->link_key_db->open(); 1976 } 1977 } 1978 1979 void hci_init(const hci_transport_t *transport, const void *config){ 1980 1981 #ifdef HAVE_MALLOC 1982 if (!hci_stack) { 1983 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1984 } 1985 #else 1986 hci_stack = &hci_stack_static; 1987 #endif 1988 memset(hci_stack, 0, sizeof(hci_stack_t)); 1989 1990 // reference to use transport layer implementation 1991 hci_stack->hci_transport = transport; 1992 1993 // reference to used config 1994 hci_stack->config = config; 1995 1996 // setup pointer for outgoing packet buffer 1997 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 1998 1999 // max acl payload size defined in config.h 2000 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2001 2002 // register packet handlers with transport 2003 transport->register_packet_handler(&packet_handler); 2004 2005 hci_stack->state = HCI_STATE_OFF; 2006 2007 // class of device 2008 hci_stack->class_of_device = 0x007a020c; // Smartphone 2009 2010 // bondable by default 2011 hci_stack->bondable = 1; 2012 2013 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2014 hci_stack->ssp_enable = 1; 2015 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2016 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2017 hci_stack->ssp_auto_accept = 1; 2018 2019 // voice setting - signed 8 bit pcm data with CVSD over the air 2020 hci_stack->sco_voice_setting = 0x40; 2021 2022 hci_state_reset(); 2023 } 2024 2025 /** 2026 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2027 */ 2028 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2029 hci_stack->chipset = chipset_driver; 2030 2031 // reset chipset driver - init is also called on power_up 2032 if (hci_stack->chipset && hci_stack->chipset->init){ 2033 hci_stack->chipset->init(hci_stack->config); 2034 } 2035 } 2036 2037 /** 2038 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2039 */ 2040 void hci_set_control(const btstack_control_t *hardware_control){ 2041 // references to used control implementation 2042 hci_stack->control = hardware_control; 2043 // init with transport config 2044 hardware_control->init(hci_stack->config); 2045 } 2046 2047 void hci_close(void){ 2048 // close remote device db 2049 if (hci_stack->link_key_db) { 2050 hci_stack->link_key_db->close(); 2051 } 2052 2053 btstack_linked_list_iterator_t lit; 2054 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2055 while (btstack_linked_list_iterator_has_next(&lit)){ 2056 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2057 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2058 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2059 hci_shutdown_connection(connection); 2060 } 2061 2062 hci_power_control(HCI_POWER_OFF); 2063 2064 #ifdef HAVE_MALLOC 2065 free(hci_stack); 2066 #endif 2067 hci_stack = NULL; 2068 } 2069 2070 void gap_set_class_of_device(uint32_t class_of_device){ 2071 hci_stack->class_of_device = class_of_device; 2072 } 2073 2074 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2075 void hci_set_bd_addr(bd_addr_t addr){ 2076 memcpy(hci_stack->custom_bd_addr, addr, 6); 2077 hci_stack->custom_bd_addr_set = 1; 2078 } 2079 2080 void hci_disable_l2cap_timeout_check(void){ 2081 disable_l2cap_timeouts = 1; 2082 } 2083 // State-Module-Driver overview 2084 // state module low-level 2085 // HCI_STATE_OFF off close 2086 // HCI_STATE_INITIALIZING, on open 2087 // HCI_STATE_WORKING, on open 2088 // HCI_STATE_HALTING, on open 2089 // HCI_STATE_SLEEPING, off/sleep close 2090 // HCI_STATE_FALLING_ASLEEP on open 2091 2092 static int hci_power_control_on(void){ 2093 2094 // power on 2095 int err = 0; 2096 if (hci_stack->control && hci_stack->control->on){ 2097 err = (*hci_stack->control->on)(); 2098 } 2099 if (err){ 2100 log_error( "POWER_ON failed"); 2101 hci_emit_hci_open_failed(); 2102 return err; 2103 } 2104 2105 // int chipset driver 2106 if (hci_stack->chipset && hci_stack->chipset->init){ 2107 hci_stack->chipset->init(hci_stack->config); 2108 } 2109 2110 // init transport 2111 if (hci_stack->hci_transport->init){ 2112 hci_stack->hci_transport->init(hci_stack->config); 2113 } 2114 2115 // open transport 2116 err = hci_stack->hci_transport->open(); 2117 if (err){ 2118 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2119 if (hci_stack->control && hci_stack->control->off){ 2120 (*hci_stack->control->off)(); 2121 } 2122 hci_emit_hci_open_failed(); 2123 return err; 2124 } 2125 return 0; 2126 } 2127 2128 static void hci_power_control_off(void){ 2129 2130 log_info("hci_power_control_off"); 2131 2132 // close low-level device 2133 hci_stack->hci_transport->close(); 2134 2135 log_info("hci_power_control_off - hci_transport closed"); 2136 2137 // power off 2138 if (hci_stack->control && hci_stack->control->off){ 2139 (*hci_stack->control->off)(); 2140 } 2141 2142 log_info("hci_power_control_off - control closed"); 2143 2144 hci_stack->state = HCI_STATE_OFF; 2145 } 2146 2147 static void hci_power_control_sleep(void){ 2148 2149 log_info("hci_power_control_sleep"); 2150 2151 #if 0 2152 // don't close serial port during sleep 2153 2154 // close low-level device 2155 hci_stack->hci_transport->close(hci_stack->config); 2156 #endif 2157 2158 // sleep mode 2159 if (hci_stack->control && hci_stack->control->sleep){ 2160 (*hci_stack->control->sleep)(); 2161 } 2162 2163 hci_stack->state = HCI_STATE_SLEEPING; 2164 } 2165 2166 static int hci_power_control_wake(void){ 2167 2168 log_info("hci_power_control_wake"); 2169 2170 // wake on 2171 if (hci_stack->control && hci_stack->control->wake){ 2172 (*hci_stack->control->wake)(); 2173 } 2174 2175 #if 0 2176 // open low-level device 2177 int err = hci_stack->hci_transport->open(hci_stack->config); 2178 if (err){ 2179 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2180 if (hci_stack->control && hci_stack->control->off){ 2181 (*hci_stack->control->off)(); 2182 } 2183 hci_emit_hci_open_failed(); 2184 return err; 2185 } 2186 #endif 2187 2188 return 0; 2189 } 2190 2191 static void hci_power_transition_to_initializing(void){ 2192 // set up state machine 2193 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2194 hci_stack->hci_packet_buffer_reserved = 0; 2195 hci_stack->state = HCI_STATE_INITIALIZING; 2196 hci_stack->substate = HCI_INIT_SEND_RESET; 2197 } 2198 2199 int hci_power_control(HCI_POWER_MODE power_mode){ 2200 2201 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2202 2203 int err = 0; 2204 switch (hci_stack->state){ 2205 2206 case HCI_STATE_OFF: 2207 switch (power_mode){ 2208 case HCI_POWER_ON: 2209 err = hci_power_control_on(); 2210 if (err) { 2211 log_error("hci_power_control_on() error %u", err); 2212 return err; 2213 } 2214 hci_power_transition_to_initializing(); 2215 break; 2216 case HCI_POWER_OFF: 2217 // do nothing 2218 break; 2219 case HCI_POWER_SLEEP: 2220 // do nothing (with SLEEP == OFF) 2221 break; 2222 } 2223 break; 2224 2225 case HCI_STATE_INITIALIZING: 2226 switch (power_mode){ 2227 case HCI_POWER_ON: 2228 // do nothing 2229 break; 2230 case HCI_POWER_OFF: 2231 // no connections yet, just turn it off 2232 hci_power_control_off(); 2233 break; 2234 case HCI_POWER_SLEEP: 2235 // no connections yet, just turn it off 2236 hci_power_control_sleep(); 2237 break; 2238 } 2239 break; 2240 2241 case HCI_STATE_WORKING: 2242 switch (power_mode){ 2243 case HCI_POWER_ON: 2244 // do nothing 2245 break; 2246 case HCI_POWER_OFF: 2247 // see hci_run 2248 hci_stack->state = HCI_STATE_HALTING; 2249 break; 2250 case HCI_POWER_SLEEP: 2251 // see hci_run 2252 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2253 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2254 break; 2255 } 2256 break; 2257 2258 case HCI_STATE_HALTING: 2259 switch (power_mode){ 2260 case HCI_POWER_ON: 2261 hci_power_transition_to_initializing(); 2262 break; 2263 case HCI_POWER_OFF: 2264 // do nothing 2265 break; 2266 case HCI_POWER_SLEEP: 2267 // see hci_run 2268 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2269 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2270 break; 2271 } 2272 break; 2273 2274 case HCI_STATE_FALLING_ASLEEP: 2275 switch (power_mode){ 2276 case HCI_POWER_ON: 2277 2278 #ifdef HAVE_PLATFORM_IPHONE_OS 2279 // nothing to do, if H4 supports power management 2280 if (btstack_control_iphone_power_management_enabled()){ 2281 hci_stack->state = HCI_STATE_INITIALIZING; 2282 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2283 break; 2284 } 2285 #endif 2286 hci_power_transition_to_initializing(); 2287 break; 2288 case HCI_POWER_OFF: 2289 // see hci_run 2290 hci_stack->state = HCI_STATE_HALTING; 2291 break; 2292 case HCI_POWER_SLEEP: 2293 // do nothing 2294 break; 2295 } 2296 break; 2297 2298 case HCI_STATE_SLEEPING: 2299 switch (power_mode){ 2300 case HCI_POWER_ON: 2301 2302 #ifdef HAVE_PLATFORM_IPHONE_OS 2303 // nothing to do, if H4 supports power management 2304 if (btstack_control_iphone_power_management_enabled()){ 2305 hci_stack->state = HCI_STATE_INITIALIZING; 2306 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2307 hci_update_scan_enable(); 2308 break; 2309 } 2310 #endif 2311 err = hci_power_control_wake(); 2312 if (err) return err; 2313 hci_power_transition_to_initializing(); 2314 break; 2315 case HCI_POWER_OFF: 2316 hci_stack->state = HCI_STATE_HALTING; 2317 break; 2318 case HCI_POWER_SLEEP: 2319 // do nothing 2320 break; 2321 } 2322 break; 2323 } 2324 2325 // create internal event 2326 hci_emit_state(); 2327 2328 // trigger next/first action 2329 hci_run(); 2330 2331 return 0; 2332 } 2333 2334 static void hci_update_scan_enable(void){ 2335 // 2 = page scan, 1 = inq scan 2336 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2337 hci_run(); 2338 } 2339 2340 void gap_discoverable_control(uint8_t enable){ 2341 if (enable) enable = 1; // normalize argument 2342 2343 if (hci_stack->discoverable == enable){ 2344 hci_emit_discoverable_enabled(hci_stack->discoverable); 2345 return; 2346 } 2347 2348 hci_stack->discoverable = enable; 2349 hci_update_scan_enable(); 2350 } 2351 2352 void gap_connectable_control(uint8_t enable){ 2353 if (enable) enable = 1; // normalize argument 2354 2355 // don't emit event 2356 if (hci_stack->connectable == enable) return; 2357 2358 hci_stack->connectable = enable; 2359 hci_update_scan_enable(); 2360 } 2361 2362 void gap_local_bd_addr(bd_addr_t address_buffer){ 2363 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2364 } 2365 2366 static void hci_run(void){ 2367 2368 // log_info("hci_run: entered"); 2369 btstack_linked_item_t * it; 2370 2371 // send continuation fragments first, as they block the prepared packet buffer 2372 if (hci_stack->acl_fragmentation_total_size > 0) { 2373 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2374 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2375 if (connection) { 2376 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2377 hci_send_acl_packet_fragments(connection); 2378 return; 2379 } 2380 } else { 2381 // connection gone -> discard further fragments 2382 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2383 hci_stack->acl_fragmentation_total_size = 0; 2384 hci_stack->acl_fragmentation_pos = 0; 2385 } 2386 } 2387 2388 if (!hci_can_send_command_packet_now()) return; 2389 2390 // global/non-connection oriented commands 2391 2392 // decline incoming connections 2393 if (hci_stack->decline_reason){ 2394 uint8_t reason = hci_stack->decline_reason; 2395 hci_stack->decline_reason = 0; 2396 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2397 return; 2398 } 2399 2400 // send scan enable 2401 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2402 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2403 hci_stack->new_scan_enable_value = 0xff; 2404 return; 2405 } 2406 2407 #ifdef ENABLE_BLE 2408 if (hci_stack->state == HCI_STATE_WORKING){ 2409 // handle le scan 2410 switch(hci_stack->le_scanning_state){ 2411 case LE_START_SCAN: 2412 hci_stack->le_scanning_state = LE_SCANNING; 2413 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2414 return; 2415 2416 case LE_STOP_SCAN: 2417 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2418 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2419 return; 2420 default: 2421 break; 2422 } 2423 if (hci_stack->le_scan_type != 0xff){ 2424 // defaults: active scanning, accept all advertisement packets 2425 int scan_type = hci_stack->le_scan_type; 2426 hci_stack->le_scan_type = 0xff; 2427 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); 2428 return; 2429 } 2430 // le advertisement control 2431 if (hci_stack->le_advertisements_todo){ 2432 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2433 } 2434 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2435 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2436 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2437 return; 2438 } 2439 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2440 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2441 hci_send_cmd(&hci_le_set_advertising_parameters, 2442 hci_stack->le_advertisements_interval_min, 2443 hci_stack->le_advertisements_interval_max, 2444 hci_stack->le_advertisements_type, 2445 hci_stack->le_advertisements_own_address_type, 2446 hci_stack->le_advertisements_direct_address_type, 2447 hci_stack->le_advertisements_direct_address, 2448 hci_stack->le_advertisements_channel_map, 2449 hci_stack->le_advertisements_filter_policy); 2450 return; 2451 } 2452 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2453 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2454 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2455 hci_stack->le_advertisements_data); 2456 return; 2457 } 2458 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2459 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2460 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2461 hci_stack->le_scan_response_data); 2462 return; 2463 } 2464 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2465 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2466 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2467 return; 2468 } 2469 2470 // 2471 // LE Whitelist Management 2472 // 2473 2474 // check if whitelist needs modification 2475 btstack_linked_list_iterator_t lit; 2476 int modification_pending = 0; 2477 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2478 while (btstack_linked_list_iterator_has_next(&lit)){ 2479 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2480 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2481 modification_pending = 1; 2482 break; 2483 } 2484 } 2485 2486 if (modification_pending){ 2487 // stop connnecting if modification pending 2488 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2489 hci_send_cmd(&hci_le_create_connection_cancel); 2490 return; 2491 } 2492 2493 // add/remove entries 2494 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2495 while (btstack_linked_list_iterator_has_next(&lit)){ 2496 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2497 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2498 entry->state = LE_WHITELIST_ON_CONTROLLER; 2499 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2500 return; 2501 2502 } 2503 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2504 bd_addr_t address; 2505 bd_addr_type_t address_type = entry->address_type; 2506 memcpy(address, entry->address, 6); 2507 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2508 btstack_memory_whitelist_entry_free(entry); 2509 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2510 return; 2511 } 2512 } 2513 } 2514 2515 // start connecting 2516 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2517 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2518 bd_addr_t null_addr; 2519 memset(null_addr, 0, 6); 2520 hci_send_cmd(&hci_le_create_connection, 2521 0x0060, // scan interval: 60 ms 2522 0x0030, // scan interval: 30 ms 2523 1, // use whitelist 2524 0, // peer address type 2525 null_addr, // peer bd addr 2526 hci_stack->adv_addr_type, // our addr type: 2527 0x0008, // conn interval min 2528 0x0018, // conn interval max 2529 0, // conn latency 2530 0x0048, // supervision timeout 2531 0x0001, // min ce length 2532 0x0001 // max ce length 2533 ); 2534 return; 2535 } 2536 } 2537 #endif 2538 2539 // send pending HCI commands 2540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2541 hci_connection_t * connection = (hci_connection_t *) it; 2542 2543 switch(connection->state){ 2544 case SEND_CREATE_CONNECTION: 2545 switch(connection->address_type){ 2546 case BD_ADDR_TYPE_CLASSIC: 2547 log_info("sending hci_create_connection"); 2548 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2549 break; 2550 default: 2551 #ifdef ENABLE_BLE 2552 log_info("sending hci_le_create_connection"); 2553 hci_send_cmd(&hci_le_create_connection, 2554 0x0060, // scan interval: 60 ms 2555 0x0030, // scan interval: 30 ms 2556 0, // don't use whitelist 2557 connection->address_type, // peer address type 2558 connection->address, // peer bd addr 2559 hci_stack->adv_addr_type, // our addr type: 2560 0x0008, // conn interval min 2561 0x0018, // conn interval max 2562 0, // conn latency 2563 0x0048, // supervision timeout 2564 0x0001, // min ce length 2565 0x0001 // max ce length 2566 ); 2567 2568 connection->state = SENT_CREATE_CONNECTION; 2569 #endif 2570 break; 2571 } 2572 return; 2573 2574 case RECEIVED_CONNECTION_REQUEST: 2575 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2576 connection->state = ACCEPTED_CONNECTION_REQUEST; 2577 connection->role = HCI_ROLE_SLAVE; 2578 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2579 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2580 } 2581 return; 2582 2583 #ifdef ENABLE_BLE 2584 case SEND_CANCEL_CONNECTION: 2585 connection->state = SENT_CANCEL_CONNECTION; 2586 hci_send_cmd(&hci_le_create_connection_cancel); 2587 return; 2588 #endif 2589 case SEND_DISCONNECT: 2590 connection->state = SENT_DISCONNECT; 2591 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2592 return; 2593 2594 default: 2595 break; 2596 } 2597 2598 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2599 log_info("responding to link key request"); 2600 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2601 link_key_t link_key; 2602 link_key_type_t link_key_type; 2603 if ( hci_stack->link_key_db 2604 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2605 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2606 connection->link_key_type = link_key_type; 2607 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2608 } else { 2609 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2610 } 2611 return; 2612 } 2613 2614 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2615 log_info("denying to pin request"); 2616 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2617 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2618 return; 2619 } 2620 2621 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2622 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2623 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2624 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2625 // tweak authentication requirements 2626 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2627 if (connection->bonding_flags & BONDING_DEDICATED){ 2628 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2629 } 2630 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2631 authreq |= 1; 2632 } 2633 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2634 } else { 2635 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2636 } 2637 return; 2638 } 2639 2640 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2641 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2642 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2643 return; 2644 } 2645 2646 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2647 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2648 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2649 return; 2650 } 2651 2652 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2653 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2654 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2655 return; 2656 } 2657 2658 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2659 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2660 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2661 return; 2662 } 2663 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2664 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2665 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2666 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2667 return; 2668 } 2669 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2670 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2671 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2672 return; 2673 } 2674 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2675 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2676 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2677 return; 2678 } 2679 2680 #ifdef ENABLE_BLE 2681 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2682 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2683 2684 uint16_t connection_interval_min = connection->le_conn_interval_min; 2685 connection->le_conn_interval_min = 0; 2686 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2687 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2688 0x0000, 0xffff); 2689 } 2690 #endif 2691 } 2692 2693 hci_connection_t * connection; 2694 switch (hci_stack->state){ 2695 case HCI_STATE_INITIALIZING: 2696 hci_initializing_run(); 2697 break; 2698 2699 case HCI_STATE_HALTING: 2700 2701 log_info("HCI_STATE_HALTING"); 2702 2703 // free whitelist entries 2704 #ifdef ENABLE_BLE 2705 { 2706 btstack_linked_list_iterator_t lit; 2707 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2708 while (btstack_linked_list_iterator_has_next(&lit)){ 2709 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2710 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2711 btstack_memory_whitelist_entry_free(entry); 2712 } 2713 } 2714 #endif 2715 // close all open connections 2716 connection = (hci_connection_t *) hci_stack->connections; 2717 if (connection){ 2718 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2719 if (!hci_can_send_command_packet_now()) return; 2720 2721 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2722 2723 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2724 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2725 2726 // ... which would be ignored anyway as we shutdown (free) the connection now 2727 hci_shutdown_connection(connection); 2728 2729 // finally, send the disconnect command 2730 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2731 return; 2732 } 2733 log_info("HCI_STATE_HALTING, calling off"); 2734 2735 // switch mode 2736 hci_power_control_off(); 2737 2738 log_info("HCI_STATE_HALTING, emitting state"); 2739 hci_emit_state(); 2740 log_info("HCI_STATE_HALTING, done"); 2741 break; 2742 2743 case HCI_STATE_FALLING_ASLEEP: 2744 switch(hci_stack->substate) { 2745 case HCI_FALLING_ASLEEP_DISCONNECT: 2746 log_info("HCI_STATE_FALLING_ASLEEP"); 2747 // close all open connections 2748 connection = (hci_connection_t *) hci_stack->connections; 2749 2750 #ifdef HAVE_PLATFORM_IPHONE_OS 2751 // don't close connections, if H4 supports power management 2752 if (btstack_control_iphone_power_management_enabled()){ 2753 connection = NULL; 2754 } 2755 #endif 2756 if (connection){ 2757 2758 // send disconnect 2759 if (!hci_can_send_command_packet_now()) return; 2760 2761 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2762 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2763 2764 // send disconnected event right away - causes higher layer connections to get closed, too. 2765 hci_shutdown_connection(connection); 2766 return; 2767 } 2768 2769 if (hci_classic_supported()){ 2770 // disable page and inquiry scan 2771 if (!hci_can_send_command_packet_now()) return; 2772 2773 log_info("HCI_STATE_HALTING, disabling inq scans"); 2774 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2775 2776 // continue in next sub state 2777 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2778 break; 2779 } 2780 // fall through for ble-only chips 2781 2782 case HCI_FALLING_ASLEEP_COMPLETE: 2783 log_info("HCI_STATE_HALTING, calling sleep"); 2784 #ifdef HAVE_PLATFORM_IPHONE_OS 2785 // don't actually go to sleep, if H4 supports power management 2786 if (btstack_control_iphone_power_management_enabled()){ 2787 // SLEEP MODE reached 2788 hci_stack->state = HCI_STATE_SLEEPING; 2789 hci_emit_state(); 2790 break; 2791 } 2792 #endif 2793 // switch mode 2794 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2795 hci_emit_state(); 2796 break; 2797 2798 default: 2799 break; 2800 } 2801 break; 2802 2803 default: 2804 break; 2805 } 2806 } 2807 2808 int hci_send_cmd_packet(uint8_t *packet, int size){ 2809 bd_addr_t addr; 2810 hci_connection_t * conn; 2811 // house-keeping 2812 2813 // create_connection? 2814 if (IS_COMMAND(packet, hci_create_connection)){ 2815 reverse_bd_addr(&packet[3], addr); 2816 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2817 2818 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2819 if (!conn){ 2820 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2821 if (!conn){ 2822 // notify client that alloc failed 2823 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2824 return 0; // don't sent packet to controller 2825 } 2826 conn->state = SEND_CREATE_CONNECTION; 2827 } 2828 log_info("conn state %u", conn->state); 2829 switch (conn->state){ 2830 // if connection active exists 2831 case OPEN: 2832 // and OPEN, emit connection complete command, don't send to controller 2833 hci_emit_connection_complete(addr, conn->con_handle, 0); 2834 return 0; 2835 case SEND_CREATE_CONNECTION: 2836 // connection created by hci, e.g. dedicated bonding 2837 break; 2838 default: 2839 // otherwise, just ignore as it is already in the open process 2840 return 0; 2841 } 2842 conn->state = SENT_CREATE_CONNECTION; 2843 } 2844 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2845 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2846 } 2847 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2848 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2849 } 2850 2851 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2852 if (hci_stack->link_key_db){ 2853 reverse_bd_addr(&packet[3], addr); 2854 hci_stack->link_key_db->delete_link_key(addr); 2855 } 2856 } 2857 2858 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2859 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2860 reverse_bd_addr(&packet[3], addr); 2861 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2862 if (conn){ 2863 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2864 } 2865 } 2866 2867 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2868 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2869 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2870 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2871 reverse_bd_addr(&packet[3], addr); 2872 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2873 if (conn){ 2874 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2875 } 2876 } 2877 2878 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2879 hci_stack->loopback_mode = packet[3]; 2880 } 2881 2882 #ifdef ENABLE_BLE 2883 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2884 hci_stack->adv_addr_type = packet[8]; 2885 } 2886 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2887 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2888 } 2889 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2890 hci_stack->le_advertisements_active = packet[3]; 2891 } 2892 if (IS_COMMAND(packet, hci_le_create_connection)){ 2893 // white list used? 2894 uint8_t initiator_filter_policy = packet[7]; 2895 switch (initiator_filter_policy){ 2896 case 0: 2897 // whitelist not used 2898 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2899 break; 2900 case 1: 2901 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2902 break; 2903 default: 2904 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2905 break; 2906 } 2907 } 2908 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2909 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2910 } 2911 #endif 2912 2913 hci_stack->num_cmd_packets--; 2914 2915 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2916 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2917 2918 // release packet buffer for synchronous transport implementations 2919 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2920 hci_stack->hci_packet_buffer_reserved = 0; 2921 } 2922 2923 return err; 2924 } 2925 2926 // disconnect because of security block 2927 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2928 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2929 if (!connection) return; 2930 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2931 } 2932 2933 2934 // Configure Secure Simple Pairing 2935 2936 // enable will enable SSP during init 2937 void gap_ssp_set_enable(int enable){ 2938 hci_stack->ssp_enable = enable; 2939 } 2940 2941 static int hci_local_ssp_activated(void){ 2942 return gap_ssp_supported() && hci_stack->ssp_enable; 2943 } 2944 2945 // if set, BTstack will respond to io capability request using authentication requirement 2946 void gap_ssp_set_io_capability(int io_capability){ 2947 hci_stack->ssp_io_capability = io_capability; 2948 } 2949 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 2950 hci_stack->ssp_authentication_requirement = authentication_requirement; 2951 } 2952 2953 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2954 void gap_ssp_set_auto_accept(int auto_accept){ 2955 hci_stack->ssp_auto_accept = auto_accept; 2956 } 2957 2958 /** 2959 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2960 */ 2961 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2962 2963 if (!hci_can_send_command_packet_now()){ 2964 log_error("hci_send_cmd called but cannot send packet now"); 2965 return 0; 2966 } 2967 2968 // for HCI INITIALIZATION 2969 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2970 hci_stack->last_cmd_opcode = cmd->opcode; 2971 2972 hci_reserve_packet_buffer(); 2973 uint8_t * packet = hci_stack->hci_packet_buffer; 2974 2975 va_list argptr; 2976 va_start(argptr, cmd); 2977 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 2978 va_end(argptr); 2979 2980 return hci_send_cmd_packet(packet, size); 2981 } 2982 2983 // Create various non-HCI events. 2984 // TODO: generalize, use table similar to hci_create_command 2985 2986 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 2987 // dump packet 2988 if (dump) { 2989 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 2990 } 2991 2992 // dispatch to all event handlers 2993 btstack_linked_list_iterator_t it; 2994 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 2995 while (btstack_linked_list_iterator_has_next(&it)){ 2996 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 2997 entry->callback(HCI_EVENT_PACKET, 0, event, size); 2998 } 2999 } 3000 3001 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3002 if (!hci_stack->acl_packet_handler) return; 3003 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3004 } 3005 3006 static void hci_notify_if_sco_can_send_now(void){ 3007 // notify SCO sender if waiting 3008 if (!hci_stack->sco_waiting_for_can_send_now) return; 3009 if (hci_can_send_sco_packet_now()){ 3010 hci_stack->sco_waiting_for_can_send_now = 0; 3011 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3012 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3013 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3014 } 3015 } 3016 3017 void hci_emit_state(void){ 3018 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3019 uint8_t event[3]; 3020 event[0] = BTSTACK_EVENT_STATE; 3021 event[1] = sizeof(event) - 2; 3022 event[2] = hci_stack->state; 3023 hci_emit_event(event, sizeof(event), 1); 3024 } 3025 3026 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3027 uint8_t event[13]; 3028 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3029 event[1] = sizeof(event) - 2; 3030 event[2] = status; 3031 little_endian_store_16(event, 3, con_handle); 3032 reverse_bd_addr(address, &event[5]); 3033 event[11] = 1; // ACL connection 3034 event[12] = 0; // encryption disabled 3035 hci_emit_event(event, sizeof(event), 1); 3036 } 3037 3038 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3039 uint8_t event[21]; 3040 event[0] = HCI_EVENT_LE_META; 3041 event[1] = sizeof(event) - 2; 3042 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3043 event[3] = status; 3044 little_endian_store_16(event, 4, con_handle); 3045 event[6] = 0; // TODO: role 3046 event[7] = address_type; 3047 reverse_bd_addr(address, &event[8]); 3048 little_endian_store_16(event, 14, 0); // interval 3049 little_endian_store_16(event, 16, 0); // latency 3050 little_endian_store_16(event, 18, 0); // supervision timeout 3051 event[20] = 0; // master clock accuracy 3052 hci_emit_event(event, sizeof(event), 1); 3053 } 3054 3055 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3056 uint8_t event[6]; 3057 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3058 event[1] = sizeof(event) - 2; 3059 event[2] = 0; // status = OK 3060 little_endian_store_16(event, 3, con_handle); 3061 event[5] = reason; 3062 hci_emit_event(event, sizeof(event), 1); 3063 } 3064 3065 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3066 if (disable_l2cap_timeouts) return; 3067 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3068 uint8_t event[4]; 3069 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3070 event[1] = sizeof(event) - 2; 3071 little_endian_store_16(event, 2, conn->con_handle); 3072 hci_emit_event(event, sizeof(event), 1); 3073 } 3074 3075 static void hci_emit_nr_connections_changed(void){ 3076 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3077 uint8_t event[3]; 3078 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3079 event[1] = sizeof(event) - 2; 3080 event[2] = nr_hci_connections(); 3081 hci_emit_event(event, sizeof(event), 1); 3082 } 3083 3084 static void hci_emit_hci_open_failed(void){ 3085 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3086 uint8_t event[2]; 3087 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3088 event[1] = sizeof(event) - 2; 3089 hci_emit_event(event, sizeof(event), 1); 3090 } 3091 3092 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3093 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3094 uint8_t event[3]; 3095 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3096 event[1] = sizeof(event) - 2; 3097 event[2] = enabled; 3098 hci_emit_event(event, sizeof(event), 1); 3099 } 3100 3101 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3102 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3103 uint8_t event[5]; 3104 int pos = 0; 3105 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3106 event[pos++] = sizeof(event) - 2; 3107 little_endian_store_16(event, 2, con_handle); 3108 pos += 2; 3109 event[pos++] = level; 3110 hci_emit_event(event, sizeof(event), 1); 3111 } 3112 3113 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3114 log_info("hci_emit_dedicated_bonding_result %u ", status); 3115 uint8_t event[9]; 3116 int pos = 0; 3117 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3118 event[pos++] = sizeof(event) - 2; 3119 event[pos++] = status; 3120 reverse_bd_addr(address, &event[pos]); 3121 hci_emit_event(event, sizeof(event), 1); 3122 } 3123 3124 // query if remote side supports eSCO 3125 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3126 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3127 if (!connection) return 0; 3128 return connection->remote_supported_feature_eSCO; 3129 } 3130 3131 // query if remote side supports SSP 3132 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3133 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3134 if (!connection) return 0; 3135 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3136 } 3137 3138 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3139 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3140 } 3141 3142 // GAP API 3143 /** 3144 * @bbrief enable/disable bonding. default is enabled 3145 * @praram enabled 3146 */ 3147 void gap_set_bondable_mode(int enable){ 3148 hci_stack->bondable = enable ? 1 : 0; 3149 } 3150 /** 3151 * @brief Get bondable mode. 3152 * @return 1 if bondable 3153 */ 3154 int gap_get_bondable_mode(void){ 3155 return hci_stack->bondable; 3156 } 3157 3158 /** 3159 * @brief map link keys to security levels 3160 */ 3161 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3162 switch (link_key_type){ 3163 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3164 return LEVEL_4; 3165 case COMBINATION_KEY: 3166 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3167 return LEVEL_3; 3168 default: 3169 return LEVEL_2; 3170 } 3171 } 3172 3173 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3174 if (!connection) return LEVEL_0; 3175 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3176 return gap_security_level_for_link_key_type(connection->link_key_type); 3177 } 3178 3179 3180 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3181 log_info("gap_mitm_protection_required_for_security_level %u", level); 3182 return level > LEVEL_2; 3183 } 3184 3185 /** 3186 * @brief get current security level 3187 */ 3188 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3189 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3190 if (!connection) return LEVEL_0; 3191 return gap_security_level_for_connection(connection); 3192 } 3193 3194 /** 3195 * @brief request connection to device to 3196 * @result GAP_AUTHENTICATION_RESULT 3197 */ 3198 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3199 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3200 if (!connection){ 3201 hci_emit_security_level(con_handle, LEVEL_0); 3202 return; 3203 } 3204 gap_security_level_t current_level = gap_security_level(con_handle); 3205 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3206 if (current_level >= requested_level){ 3207 hci_emit_security_level(con_handle, current_level); 3208 return; 3209 } 3210 3211 connection->requested_security_level = requested_level; 3212 3213 #if 0 3214 // sending encryption request without a link key results in an error. 3215 // TODO: figure out how to use it properly 3216 3217 // would enabling ecnryption suffice (>= LEVEL_2)? 3218 if (hci_stack->link_key_db){ 3219 link_key_type_t link_key_type; 3220 link_key_t link_key; 3221 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3222 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3223 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3224 return; 3225 } 3226 } 3227 } 3228 #endif 3229 3230 // try to authenticate connection 3231 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3232 hci_run(); 3233 } 3234 3235 /** 3236 * @brief start dedicated bonding with device. disconnect after bonding 3237 * @param device 3238 * @param request MITM protection 3239 * @result GAP_DEDICATED_BONDING_COMPLETE 3240 */ 3241 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3242 3243 // create connection state machine 3244 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3245 3246 if (!connection){ 3247 return BTSTACK_MEMORY_ALLOC_FAILED; 3248 } 3249 3250 // delete linkn key 3251 gap_drop_link_key_for_bd_addr(device); 3252 3253 // configure LEVEL_2/3, dedicated bonding 3254 connection->state = SEND_CREATE_CONNECTION; 3255 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3256 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3257 connection->bonding_flags = BONDING_DEDICATED; 3258 3259 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3260 3261 // handle: connnection failure (connection complete != ok) 3262 // handle: authentication failure 3263 // handle: disconnect on done 3264 3265 hci_run(); 3266 3267 return 0; 3268 } 3269 3270 void gap_set_local_name(const char * local_name){ 3271 hci_stack->local_name = local_name; 3272 } 3273 3274 void gap_start_scan(void){ 3275 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3276 hci_stack->le_scanning_state = LE_START_SCAN; 3277 hci_run(); 3278 } 3279 3280 void gap_stop_scan(void){ 3281 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3282 hci_stack->le_scanning_state = LE_STOP_SCAN; 3283 hci_run(); 3284 } 3285 3286 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3287 hci_stack->le_scan_type = scan_type; 3288 hci_stack->le_scan_interval = scan_interval; 3289 hci_stack->le_scan_window = scan_window; 3290 hci_run(); 3291 } 3292 3293 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3294 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3295 if (!conn){ 3296 log_info("gap_connect: no connection exists yet, creating context"); 3297 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3298 if (!conn){ 3299 // notify client that alloc failed 3300 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3301 log_info("gap_connect: failed to alloc hci_connection_t"); 3302 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3303 } 3304 conn->state = SEND_CREATE_CONNECTION; 3305 log_info("gap_connect: send create connection next"); 3306 hci_run(); 3307 return 0; 3308 } 3309 3310 if (!hci_is_le_connection(conn) || 3311 conn->state == SEND_CREATE_CONNECTION || 3312 conn->state == SENT_CREATE_CONNECTION) { 3313 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3314 log_error("gap_connect: classic connection or connect is already being created"); 3315 return GATT_CLIENT_IN_WRONG_STATE; 3316 } 3317 3318 log_info("gap_connect: context exists with state %u", conn->state); 3319 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3320 hci_run(); 3321 return 0; 3322 } 3323 3324 // @assumption: only a single outgoing LE Connection exists 3325 static hci_connection_t * gap_get_outgoing_connection(void){ 3326 btstack_linked_item_t *it; 3327 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3328 hci_connection_t * conn = (hci_connection_t *) it; 3329 if (!hci_is_le_connection(conn)) continue; 3330 switch (conn->state){ 3331 case SEND_CREATE_CONNECTION: 3332 case SENT_CREATE_CONNECTION: 3333 return conn; 3334 default: 3335 break; 3336 }; 3337 } 3338 return NULL; 3339 } 3340 3341 uint8_t gap_connect_cancel(void){ 3342 hci_connection_t * conn = gap_get_outgoing_connection(); 3343 if (!conn) return 0; 3344 switch (conn->state){ 3345 case SEND_CREATE_CONNECTION: 3346 // skip sending create connection and emit event instead 3347 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3348 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3349 btstack_memory_hci_connection_free( conn ); 3350 break; 3351 case SENT_CREATE_CONNECTION: 3352 // request to send cancel connection 3353 conn->state = SEND_CANCEL_CONNECTION; 3354 hci_run(); 3355 break; 3356 default: 3357 break; 3358 } 3359 return 0; 3360 } 3361 3362 /** 3363 * @brief Updates the connection parameters for a given LE connection 3364 * @param handle 3365 * @param conn_interval_min (unit: 1.25ms) 3366 * @param conn_interval_max (unit: 1.25ms) 3367 * @param conn_latency 3368 * @param supervision_timeout (unit: 10ms) 3369 * @returns 0 if ok 3370 */ 3371 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3372 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3373 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3374 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3375 connection->le_conn_interval_min = conn_interval_min; 3376 connection->le_conn_interval_max = conn_interval_max; 3377 connection->le_conn_latency = conn_latency; 3378 connection->le_supervision_timeout = supervision_timeout; 3379 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3380 hci_run(); 3381 return 0; 3382 } 3383 3384 /** 3385 * @brief Request an update of the connection parameter for a given LE connection 3386 * @param handle 3387 * @param conn_interval_min (unit: 1.25ms) 3388 * @param conn_interval_max (unit: 1.25ms) 3389 * @param conn_latency 3390 * @param supervision_timeout (unit: 10ms) 3391 * @returns 0 if ok 3392 */ 3393 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3394 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3395 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3396 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3397 connection->le_conn_interval_min = conn_interval_min; 3398 connection->le_conn_interval_max = conn_interval_max; 3399 connection->le_conn_latency = conn_latency; 3400 connection->le_supervision_timeout = supervision_timeout; 3401 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3402 hci_run(); 3403 return 0; 3404 } 3405 3406 static void gap_advertisments_changed(void){ 3407 // disable advertisements before updating adv, scan data, or adv params 3408 if (hci_stack->le_advertisements_active){ 3409 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3410 } 3411 hci_run(); 3412 } 3413 3414 /** 3415 * @brief Set Advertisement Data 3416 * @param advertising_data_length 3417 * @param advertising_data (max 31 octets) 3418 * @note data is not copied, pointer has to stay valid 3419 */ 3420 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3421 hci_stack->le_advertisements_data_len = advertising_data_length; 3422 hci_stack->le_advertisements_data = advertising_data; 3423 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3424 gap_advertisments_changed(); 3425 } 3426 3427 /** 3428 * @brief Set Scan Response Data 3429 * @param advertising_data_length 3430 * @param advertising_data (max 31 octets) 3431 * @note data is not copied, pointer has to stay valid 3432 */ 3433 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3434 hci_stack->le_scan_response_data_len = scan_response_data_length; 3435 hci_stack->le_scan_response_data = scan_response_data; 3436 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3437 gap_advertisments_changed(); 3438 } 3439 3440 /** 3441 * @brief Set Advertisement Parameters 3442 * @param adv_int_min 3443 * @param adv_int_max 3444 * @param adv_type 3445 * @param own_address_type 3446 * @param direct_address_type 3447 * @param direct_address 3448 * @param channel_map 3449 * @param filter_policy 3450 * 3451 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3452 */ 3453 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3454 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3455 uint8_t channel_map, uint8_t filter_policy) { 3456 3457 hci_stack->le_advertisements_interval_min = adv_int_min; 3458 hci_stack->le_advertisements_interval_max = adv_int_max; 3459 hci_stack->le_advertisements_type = adv_type; 3460 hci_stack->le_advertisements_own_address_type = own_address_type; 3461 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3462 hci_stack->le_advertisements_channel_map = channel_map; 3463 hci_stack->le_advertisements_filter_policy = filter_policy; 3464 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3465 3466 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3467 gap_advertisments_changed(); 3468 } 3469 3470 /** 3471 * @brief Enable/Disable Advertisements 3472 * @param enabled 3473 */ 3474 void gap_advertisements_enable(int enabled){ 3475 hci_stack->le_advertisements_enabled = enabled; 3476 if (enabled && !hci_stack->le_advertisements_active){ 3477 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3478 } 3479 if (!enabled && hci_stack->le_advertisements_active){ 3480 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3481 } 3482 hci_run(); 3483 } 3484 3485 3486 uint8_t gap_disconnect(hci_con_handle_t handle){ 3487 hci_connection_t * conn = hci_connection_for_handle(handle); 3488 if (!conn){ 3489 hci_emit_disconnection_complete(handle, 0); 3490 return 0; 3491 } 3492 conn->state = SEND_DISCONNECT; 3493 hci_run(); 3494 return 0; 3495 } 3496 3497 /** 3498 * @brief Get connection type 3499 * @param con_handle 3500 * @result connection_type 3501 */ 3502 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3503 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3504 if (!conn) return GAP_CONNECTION_INVALID; 3505 switch (conn->address_type){ 3506 case BD_ADDR_TYPE_LE_PUBLIC: 3507 case BD_ADDR_TYPE_LE_RANDOM: 3508 return GAP_CONNECTION_LE; 3509 case BD_ADDR_TYPE_SCO: 3510 return GAP_CONNECTION_SCO; 3511 case BD_ADDR_TYPE_CLASSIC: 3512 return GAP_CONNECTION_ACL; 3513 default: 3514 return GAP_CONNECTION_INVALID; 3515 } 3516 } 3517 3518 #ifdef ENABLE_BLE 3519 3520 /** 3521 * @brief Auto Connection Establishment - Start Connecting to device 3522 * @param address_typ 3523 * @param address 3524 * @returns 0 if ok 3525 */ 3526 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3527 // check capacity 3528 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3529 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3530 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3531 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3532 entry->address_type = address_type; 3533 memcpy(entry->address, address, 6); 3534 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3535 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3536 hci_run(); 3537 return 0; 3538 } 3539 3540 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3541 btstack_linked_list_iterator_t it; 3542 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3543 while (btstack_linked_list_iterator_has_next(&it)){ 3544 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3545 if (entry->address_type != address_type) continue; 3546 if (memcmp(entry->address, address, 6) != 0) continue; 3547 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3548 // remove from controller if already present 3549 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3550 continue; 3551 } 3552 // direclty remove entry from whitelist 3553 btstack_linked_list_iterator_remove(&it); 3554 btstack_memory_whitelist_entry_free(entry); 3555 } 3556 } 3557 3558 /** 3559 * @brief Auto Connection Establishment - Stop Connecting to device 3560 * @param address_typ 3561 * @param address 3562 * @returns 0 if ok 3563 */ 3564 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3565 hci_remove_from_whitelist(address_type, address); 3566 hci_run(); 3567 return 0; 3568 } 3569 3570 /** 3571 * @brief Auto Connection Establishment - Stop everything 3572 * @note Convenience function to stop all active auto connection attempts 3573 */ 3574 void gap_auto_connection_stop_all(void){ 3575 btstack_linked_list_iterator_t it; 3576 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3577 while (btstack_linked_list_iterator_has_next(&it)){ 3578 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3579 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3580 // remove from controller if already present 3581 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3582 continue; 3583 } 3584 // directly remove entry from whitelist 3585 btstack_linked_list_iterator_remove(&it); 3586 btstack_memory_whitelist_entry_free(entry); 3587 } 3588 hci_run(); 3589 } 3590 3591 #endif 3592 3593 /** 3594 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3595 * @param inquriy_mode see bluetooth_defines.h 3596 */ 3597 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3598 hci_stack->inquiry_mode = mode; 3599 } 3600 3601 /** 3602 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3603 */ 3604 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3605 hci_stack->sco_voice_setting = voice_setting; 3606 } 3607 3608 /** 3609 * @brief Get SCO Voice Setting 3610 * @return current voice setting 3611 */ 3612 uint16_t hci_get_sco_voice_setting(void){ 3613 return hci_stack->sco_voice_setting; 3614 } 3615 3616 /** @brief Get SCO packet length for current SCO Voice setting 3617 * @note Using SCO packets of the exact length is required for USB transfer 3618 * @return Length of SCO packets in bytes (not audio frames) 3619 */ 3620 int hci_get_sco_packet_length(void){ 3621 // see Core Spec for H2 USB Transfer. 3622 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3623 return 27; 3624 } 3625 3626 /** 3627 * @brief Set callback for Bluetooth Hardware Error 3628 */ 3629 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3630 hci_stack->hardware_error_callback = fn; 3631 } 3632 3633 /** 3634 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3635 * @note Can be used to select chipset driver dynamically during startup 3636 */ 3637 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3638 hci_stack->local_version_information_callback = fn; 3639 } 3640 3641 void hci_disconnect_all(void){ 3642 btstack_linked_list_iterator_t it; 3643 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3644 while (btstack_linked_list_iterator_has_next(&it)){ 3645 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3646 if (con->state == SENT_DISCONNECT) continue; 3647 con->state = SEND_DISCONNECT; 3648 } 3649 hci_run(); 3650 } 3651