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(hci_connection_t *conn, 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) { 267 hci_stack->link_key_db->delete_link_key(addr); 268 } 269 } 270 271 static int hci_is_le_connection(hci_connection_t * connection){ 272 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 273 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 274 } 275 276 277 /** 278 * count connections 279 */ 280 static int nr_hci_connections(void){ 281 int count = 0; 282 btstack_linked_item_t *it; 283 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 284 return count; 285 } 286 287 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 288 289 int num_packets_sent_classic = 0; 290 int num_packets_sent_le = 0; 291 292 btstack_linked_item_t *it; 293 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 294 hci_connection_t * connection = (hci_connection_t *) it; 295 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 296 num_packets_sent_classic += connection->num_acl_packets_sent; 297 } else { 298 num_packets_sent_le += connection->num_acl_packets_sent; 299 } 300 } 301 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 302 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 303 int free_slots_le = 0; 304 305 if (free_slots_classic < 0){ 306 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); 307 return 0; 308 } 309 310 if (hci_stack->le_acl_packets_total_num){ 311 // if we have LE slots, they are used 312 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 313 if (free_slots_le < 0){ 314 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); 315 return 0; 316 } 317 } else { 318 // otherwise, classic slots are used for LE, too 319 free_slots_classic -= num_packets_sent_le; 320 if (free_slots_classic < 0){ 321 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); 322 return 0; 323 } 324 } 325 326 switch (address_type){ 327 case BD_ADDR_TYPE_UNKNOWN: 328 log_error("hci_number_free_acl_slots: unknown address type"); 329 return 0; 330 331 case BD_ADDR_TYPE_CLASSIC: 332 return free_slots_classic; 333 334 default: 335 if (hci_stack->le_acl_packets_total_num){ 336 return free_slots_le; 337 } 338 return free_slots_classic; 339 } 340 } 341 342 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 343 // get connection type 344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 345 if (!connection){ 346 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 347 return 0; 348 } 349 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 350 } 351 352 static int hci_number_free_sco_slots(void){ 353 int num_sco_packets_sent = 0; 354 btstack_linked_item_t *it; 355 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 356 hci_connection_t * connection = (hci_connection_t *) it; 357 num_sco_packets_sent += connection->num_sco_packets_sent; 358 } 359 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 360 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 361 return 0; 362 } 363 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 364 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 365 } 366 367 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 368 int hci_can_send_command_packet_now(void){ 369 if (hci_stack->hci_packet_buffer_reserved) return 0; 370 371 // check for async hci transport implementations 372 if (hci_stack->hci_transport->can_send_packet_now){ 373 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 374 return 0; 375 } 376 } 377 378 return hci_stack->num_cmd_packets > 0; 379 } 380 381 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 382 // check for async hci transport implementations 383 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 384 return hci_stack->hci_transport->can_send_packet_now(packet_type); 385 } 386 387 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 388 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 389 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 390 } 391 392 int hci_can_send_acl_classic_packet_now(void){ 393 if (hci_stack->hci_packet_buffer_reserved) return 0; 394 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 395 } 396 397 int hci_can_send_acl_le_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_LE_PUBLIC); 400 } 401 402 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 403 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 404 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 405 } 406 407 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 408 if (hci_stack->hci_packet_buffer_reserved) return 0; 409 return hci_can_send_prepared_acl_packet_now(con_handle); 410 } 411 412 int hci_can_send_prepared_sco_packet_now(void){ 413 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 414 if (!hci_stack->synchronous_flow_control_enabled) return 1; 415 return hci_number_free_sco_slots() > 0; 416 } 417 418 int hci_can_send_sco_packet_now(void){ 419 if (hci_stack->hci_packet_buffer_reserved) return 0; 420 return hci_can_send_prepared_sco_packet_now(); 421 } 422 423 void hci_request_sco_can_send_now_event(void){ 424 hci_stack->sco_waiting_for_can_send_now = 1; 425 hci_notify_if_sco_can_send_now(); 426 } 427 428 // used for internal checks in l2cap.c 429 int hci_is_packet_buffer_reserved(void){ 430 return hci_stack->hci_packet_buffer_reserved; 431 } 432 433 // reserves outgoing packet buffer. @returns 1 if successful 434 int hci_reserve_packet_buffer(void){ 435 if (hci_stack->hci_packet_buffer_reserved) { 436 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 437 return 0; 438 } 439 hci_stack->hci_packet_buffer_reserved = 1; 440 return 1; 441 } 442 443 void hci_release_packet_buffer(void){ 444 hci_stack->hci_packet_buffer_reserved = 0; 445 } 446 447 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 448 static int hci_transport_synchronous(void){ 449 return hci_stack->hci_transport->can_send_packet_now == NULL; 450 } 451 452 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 453 454 // 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); 455 456 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 457 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 458 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 459 max_acl_data_packet_length = hci_stack->le_data_packets_length; 460 } 461 462 // testing: reduce buffer to minimum 463 // max_acl_data_packet_length = 52; 464 465 log_debug("hci_send_acl_packet_fragments entered"); 466 467 int err; 468 // multiple packets could be send on a synchronous HCI transport 469 while (1){ 470 471 log_debug("hci_send_acl_packet_fragments loop entered"); 472 473 // get current data 474 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 475 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 476 int more_fragments = 0; 477 478 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 479 if (current_acl_data_packet_length > max_acl_data_packet_length){ 480 more_fragments = 1; 481 current_acl_data_packet_length = max_acl_data_packet_length; 482 } 483 484 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 485 if (acl_header_pos > 0){ 486 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 487 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 488 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 489 } 490 491 // update header len 492 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 493 494 // count packet 495 connection->num_acl_packets_sent++; 496 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %u)", more_fragments); 497 498 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 499 if (more_fragments){ 500 // update start of next fragment to send 501 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 502 } else { 503 // done 504 hci_stack->acl_fragmentation_pos = 0; 505 hci_stack->acl_fragmentation_total_size = 0; 506 } 507 508 // send packet 509 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 510 const int size = current_acl_data_packet_length + 4; 511 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 512 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 513 514 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %u)", more_fragments); 515 516 // done yet? 517 if (!more_fragments) break; 518 519 // can send more? 520 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 521 } 522 523 log_debug("hci_send_acl_packet_fragments loop over"); 524 525 // release buffer now for synchronous transport 526 if (hci_transport_synchronous()){ 527 hci_release_packet_buffer(); 528 // notify upper stack that it might be possible to send again 529 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 530 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 531 } 532 533 return err; 534 } 535 536 // pre: caller has reserved the packet buffer 537 int hci_send_acl_packet_buffer(int size){ 538 539 // log_info("hci_send_acl_packet_buffer size %u", size); 540 541 if (!hci_stack->hci_packet_buffer_reserved) { 542 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 543 return 0; 544 } 545 546 uint8_t * packet = hci_stack->hci_packet_buffer; 547 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 548 549 // check for free places on Bluetooth module 550 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 551 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 552 hci_release_packet_buffer(); 553 return BTSTACK_ACL_BUFFERS_FULL; 554 } 555 556 hci_connection_t *connection = hci_connection_for_handle( con_handle); 557 if (!connection) { 558 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 559 hci_release_packet_buffer(); 560 return 0; 561 } 562 hci_connection_timestamp(connection); 563 564 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 565 566 // setup data 567 hci_stack->acl_fragmentation_total_size = size; 568 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 569 570 return hci_send_acl_packet_fragments(connection); 571 } 572 573 // pre: caller has reserved the packet buffer 574 int hci_send_sco_packet_buffer(int size){ 575 576 // log_info("hci_send_acl_packet_buffer size %u", size); 577 578 if (!hci_stack->hci_packet_buffer_reserved) { 579 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 580 return 0; 581 } 582 583 uint8_t * packet = hci_stack->hci_packet_buffer; 584 585 // skip checks in loopback mode 586 if (!hci_stack->loopback_mode){ 587 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 588 589 // check for free places on Bluetooth module 590 if (!hci_can_send_prepared_sco_packet_now()) { 591 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 592 hci_release_packet_buffer(); 593 return BTSTACK_ACL_BUFFERS_FULL; 594 } 595 596 // track send packet in connection struct 597 hci_connection_t *connection = hci_connection_for_handle( con_handle); 598 if (!connection) { 599 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 600 hci_release_packet_buffer(); 601 return 0; 602 } 603 connection->num_sco_packets_sent++; 604 } 605 606 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 607 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 608 609 if (hci_transport_synchronous()){ 610 hci_release_packet_buffer(); 611 // notify upper stack that it might be possible to send again 612 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 613 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 614 } 615 616 return err; 617 } 618 619 static void acl_handler(uint8_t *packet, int size){ 620 621 // log_info("acl_handler: size %u", size); 622 623 // get info 624 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 625 hci_connection_t *conn = hci_connection_for_handle(con_handle); 626 uint8_t acl_flags = READ_ACL_FLAGS(packet); 627 uint16_t acl_length = READ_ACL_LENGTH(packet); 628 629 // ignore non-registered handle 630 if (!conn){ 631 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 632 return; 633 } 634 635 // assert packet is complete 636 if (acl_length + 4 != size){ 637 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 638 return; 639 } 640 641 // update idle timestamp 642 hci_connection_timestamp(conn); 643 644 // handle different packet types 645 switch (acl_flags & 0x03) { 646 647 case 0x01: // continuation fragment 648 649 // sanity checks 650 if (conn->acl_recombination_pos == 0) { 651 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 652 return; 653 } 654 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 655 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 656 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 657 conn->acl_recombination_pos = 0; 658 return; 659 } 660 661 // append fragment payload (header already stored) 662 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 663 conn->acl_recombination_pos += acl_length; 664 665 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 666 // conn->acl_recombination_pos, conn->acl_recombination_length); 667 668 // forward complete L2CAP packet if complete. 669 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 670 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 671 // reset recombination buffer 672 conn->acl_recombination_length = 0; 673 conn->acl_recombination_pos = 0; 674 } 675 break; 676 677 case 0x02: { // first fragment 678 679 // sanity check 680 if (conn->acl_recombination_pos) { 681 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 682 conn->acl_recombination_pos = 0; 683 } 684 685 // peek into L2CAP packet! 686 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 687 688 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 689 690 // compare fragment size to L2CAP packet size 691 if (acl_length >= l2cap_length + 4){ 692 // forward fragment as L2CAP packet 693 hci_emit_acl_packet(packet, acl_length + 4); 694 } else { 695 696 if (acl_length > HCI_ACL_BUFFER_SIZE){ 697 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 698 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 699 return; 700 } 701 702 // store first fragment and tweak acl length for complete package 703 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 704 conn->acl_recombination_pos = acl_length + 4; 705 conn->acl_recombination_length = l2cap_length; 706 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 707 } 708 break; 709 710 } 711 default: 712 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 713 return; 714 } 715 716 // execute main loop 717 hci_run(); 718 } 719 720 static void hci_shutdown_connection(hci_connection_t *conn){ 721 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 722 723 btstack_run_loop_remove_timer(&conn->timeout); 724 725 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 726 btstack_memory_hci_connection_free( conn ); 727 728 // now it's gone 729 hci_emit_nr_connections_changed(); 730 } 731 732 static const uint16_t packet_type_sizes[] = { 733 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 734 HCI_ACL_DH1_SIZE, 0, 0, 0, 735 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 736 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 737 }; 738 static const uint8_t packet_type_feature_requirement_bit[] = { 739 0, // 3 slot packets 740 1, // 5 slot packets 741 25, // EDR 2 mpbs 742 26, // EDR 3 mbps 743 39, // 3 slot EDR packts 744 40, // 5 slot EDR packet 745 }; 746 static const uint16_t packet_type_feature_packet_mask[] = { 747 0x0f00, // 3 slot packets 748 0xf000, // 5 slot packets 749 0x1102, // EDR 2 mpbs 750 0x2204, // EDR 3 mbps 751 0x0300, // 3 slot EDR packts 752 0x3000, // 5 slot EDR packet 753 }; 754 755 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 756 // enable packet types based on size 757 uint16_t packet_types = 0; 758 unsigned int i; 759 for (i=0;i<16;i++){ 760 if (packet_type_sizes[i] == 0) continue; 761 if (packet_type_sizes[i] <= buffer_size){ 762 packet_types |= 1 << i; 763 } 764 } 765 // disable packet types due to missing local supported features 766 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 767 int bit_idx = packet_type_feature_requirement_bit[i]; 768 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 769 if (feature_set) continue; 770 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 771 packet_types &= ~packet_type_feature_packet_mask[i]; 772 } 773 // flip bits for "may not be used" 774 packet_types ^= 0x3306; 775 return packet_types; 776 } 777 778 uint16_t hci_usable_acl_packet_types(void){ 779 return hci_stack->packet_types; 780 } 781 782 uint8_t* hci_get_outgoing_packet_buffer(void){ 783 // hci packet buffer is >= acl data packet length 784 return hci_stack->hci_packet_buffer; 785 } 786 787 uint16_t hci_max_acl_data_packet_length(void){ 788 return hci_stack->acl_data_packet_length; 789 } 790 791 int hci_non_flushable_packet_boundary_flag_supported(void){ 792 // No. 54, byte 6, bit 6 793 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 794 } 795 796 static int gap_ssp_supported(void){ 797 // No. 51, byte 6, bit 3 798 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 799 } 800 801 static int hci_classic_supported(void){ 802 // No. 37, byte 4, bit 5, = No BR/EDR Support 803 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 804 } 805 806 static int hci_le_supported(void){ 807 #ifdef ENABLE_BLE 808 // No. 37, byte 4, bit 6 = LE Supported (Controller) 809 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 810 #else 811 return 0; 812 #endif 813 } 814 815 // get addr type and address used in advertisement packets 816 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 817 *addr_type = hci_stack->adv_addr_type; 818 if (hci_stack->adv_addr_type){ 819 memcpy(addr, hci_stack->adv_address, 6); 820 } else { 821 memcpy(addr, hci_stack->local_bd_addr, 6); 822 } 823 } 824 825 #ifdef ENABLE_BLE 826 void le_handle_advertisement_report(uint8_t *packet, int size){ 827 int offset = 3; 828 int num_reports = packet[offset]; 829 offset += 1; 830 831 int i; 832 // log_info("HCI: handle adv report with num reports: %d", num_reports); 833 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 834 for (i=0; i<num_reports;i++){ 835 uint8_t data_length = packet[offset + 8]; 836 uint8_t event_size = 10 + data_length; 837 int pos = 0; 838 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 839 event[pos++] = event_size; 840 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 841 offset += 8; 842 pos += 8; 843 event[pos++] = packet[offset + 1 + data_length]; // rssi 844 event[pos++] = packet[offset++]; //data_length; 845 memcpy(&event[pos], &packet[offset], data_length); 846 pos += data_length; 847 offset += data_length + 1; // rssi 848 hci_emit_event(event, pos, 1); 849 } 850 } 851 #endif 852 853 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 854 if (!hci_stack->config) return 0; 855 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 856 // Limit baud rate for Broadcom chipsets to 3 mbps 857 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 858 baud_rate = 3000000; 859 } 860 return baud_rate; 861 } 862 863 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 864 switch (hci_stack->substate){ 865 case HCI_INIT_W4_SEND_RESET: 866 log_info("Resend HCI Reset"); 867 hci_stack->substate = HCI_INIT_SEND_RESET; 868 hci_stack->num_cmd_packets = 1; 869 hci_run(); 870 break; 871 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 872 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 873 if (hci_stack->hci_transport->reset_link){ 874 hci_stack->hci_transport->reset_link(); 875 } 876 // NOTE: explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 877 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 878 log_info("Resend HCI Reset - CSR Warm Boot"); 879 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 880 hci_stack->num_cmd_packets = 1; 881 hci_run(); 882 break; 883 case HCI_INIT_W4_SEND_BAUD_CHANGE: { 884 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 885 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 886 hci_stack->hci_transport->set_baudrate(baud_rate); 887 // For CSR, HCI Reset is sent on new baud rate 888 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 889 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 890 hci_run(); 891 } 892 break; 893 } 894 default: 895 break; 896 } 897 } 898 899 static void hci_initializing_next_state(void){ 900 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 901 } 902 903 // assumption: hci_can_send_command_packet_now() == true 904 static void hci_initializing_run(void){ 905 log_info("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 906 switch (hci_stack->substate){ 907 case HCI_INIT_SEND_RESET: 908 hci_state_reset(); 909 910 #ifndef HAVE_PLATFORM_IPHONE_OS 911 // prepare reset if command complete not received in 100ms 912 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 913 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 914 btstack_run_loop_add_timer(&hci_stack->timeout); 915 #endif 916 // send command 917 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 918 hci_send_cmd(&hci_reset); 919 break; 920 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 921 hci_send_cmd(&hci_read_local_version_information); 922 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 923 break; 924 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 925 hci_state_reset(); 926 // prepare reset if command complete not received in 100ms 927 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 928 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 929 btstack_run_loop_add_timer(&hci_stack->timeout); 930 // send command 931 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 932 hci_send_cmd(&hci_reset); 933 break; 934 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 935 hci_state_reset(); 936 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 937 hci_send_cmd(&hci_reset); 938 break; 939 case HCI_INIT_SEND_BAUD_CHANGE: { 940 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 941 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 942 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 943 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 944 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 945 // STLC25000D: baudrate change happens within 0.5 s after command was send, 946 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 947 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 948 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 949 btstack_run_loop_add_timer(&hci_stack->timeout); 950 } 951 break; 952 } 953 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 954 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 955 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 956 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 957 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 958 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 959 break; 960 } 961 case HCI_INIT_CUSTOM_INIT: 962 log_info("Custom init"); 963 // Custom initialization 964 if (hci_stack->chipset && hci_stack->chipset->next_command){ 965 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 966 if (valid_cmd){ 967 int size = 3 + hci_stack->hci_packet_buffer[2]; 968 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 969 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 970 switch (valid_cmd) { 971 case 1: 972 default: 973 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 974 break; 975 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 976 log_info("CSR Warm Boot"); 977 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 978 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 979 btstack_run_loop_add_timer(&hci_stack->timeout); 980 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 981 && hci_stack->config 982 && hci_stack->chipset 983 // && hci_stack->chipset->set_baudrate_command -- there's no such command 984 && hci_stack->hci_transport->set_baudrate 985 && hci_transport_uart_get_main_baud_rate()){ 986 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 987 } else { 988 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 989 } 990 break; 991 } 992 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 993 break; 994 } 995 log_info("hci_run: init script done"); 996 997 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 998 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 999 int need_baud_change = hci_stack->config 1000 && hci_stack->chipset 1001 && hci_stack->chipset->set_baudrate_command 1002 && hci_stack->hci_transport->set_baudrate 1003 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1004 if (need_baud_change) { 1005 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1006 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1007 hci_stack->hci_transport->set_baudrate(baud_rate); 1008 } 1009 } 1010 } 1011 // otherwise continue 1012 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1013 hci_send_cmd(&hci_read_local_supported_commands); 1014 break; 1015 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1016 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1017 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1018 hci_send_cmd(&hci_read_local_supported_commands); 1019 break; 1020 case HCI_INIT_SET_BD_ADDR: 1021 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1022 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1023 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1024 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1025 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1026 break; 1027 case HCI_INIT_READ_BD_ADDR: 1028 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1029 hci_send_cmd(&hci_read_bd_addr); 1030 break; 1031 case HCI_INIT_READ_BUFFER_SIZE: 1032 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1033 hci_send_cmd(&hci_read_buffer_size); 1034 break; 1035 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1036 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1037 hci_send_cmd(&hci_read_local_supported_features); 1038 break; 1039 case HCI_INIT_SET_EVENT_MASK: 1040 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1041 if (hci_le_supported()){ 1042 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1043 } else { 1044 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1045 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1046 } 1047 break; 1048 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1049 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1050 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1051 break; 1052 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1053 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1054 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1055 break; 1056 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1057 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1058 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1059 break; 1060 case HCI_INIT_WRITE_LOCAL_NAME: 1061 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1062 if (hci_stack->local_name){ 1063 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1064 } else { 1065 char local_name[30]; 1066 // BTstack-11:22:33:44:55:66 1067 strcpy(local_name, "BTstack "); 1068 strcat(local_name, bd_addr_to_str(hci_stack->local_bd_addr)); 1069 log_info("---> Name %s", local_name); 1070 hci_send_cmd(&hci_write_local_name, local_name); 1071 } 1072 break; 1073 case HCI_INIT_WRITE_SCAN_ENABLE: 1074 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1075 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1076 break; 1077 // only sent if ENABLE_SCO_OVER_HCI is defined 1078 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1079 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1080 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1081 break; 1082 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1083 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1084 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1085 break; 1086 #ifdef ENABLE_BLE 1087 // LE INIT 1088 case HCI_INIT_LE_READ_BUFFER_SIZE: 1089 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1090 hci_send_cmd(&hci_le_read_buffer_size); 1091 break; 1092 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1093 // LE Supported Host = 1, Simultaneous Host = 0 1094 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1095 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1096 break; 1097 case HCI_INIT_READ_WHITE_LIST_SIZE: 1098 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1099 hci_send_cmd(&hci_le_read_white_list_size); 1100 break; 1101 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1102 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1103 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1104 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1105 break; 1106 #endif 1107 default: 1108 return; 1109 } 1110 } 1111 1112 static void hci_init_done(void){ 1113 // done. tell the app 1114 log_info("hci_init_done -> HCI_STATE_WORKING"); 1115 hci_stack->state = HCI_STATE_WORKING; 1116 hci_emit_state(); 1117 hci_run(); 1118 } 1119 1120 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1121 uint8_t command_completed = 0; 1122 1123 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1124 uint16_t opcode = little_endian_read_16(packet,3); 1125 if (opcode == hci_stack->last_cmd_opcode){ 1126 command_completed = 1; 1127 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1128 } else { 1129 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1130 } 1131 } 1132 1133 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1134 uint8_t status = packet[2]; 1135 uint16_t opcode = little_endian_read_16(packet,4); 1136 if (opcode == hci_stack->last_cmd_opcode){ 1137 if (status){ 1138 command_completed = 1; 1139 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1140 } else { 1141 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1142 } 1143 } else { 1144 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1145 } 1146 } 1147 1148 // Vendor == CSR 1149 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1150 // TODO: track actual command 1151 command_completed = 1; 1152 } 1153 1154 // Vendor == Toshiba 1155 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1156 // TODO: track actual command 1157 command_completed = 1; 1158 } 1159 1160 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1161 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1162 // 1163 // HCI Reset 1164 // Timeout 100 ms 1165 // HCI Reset 1166 // Command Complete Reset 1167 // HCI Read Local Version Information 1168 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1169 // hang... 1170 // 1171 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1172 if (!command_completed 1173 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1174 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1175 1176 uint16_t opcode = little_endian_read_16(packet,3); 1177 if (opcode == hci_reset.opcode){ 1178 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1179 return; 1180 } 1181 } 1182 1183 // CSR & H5 1184 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1185 if (!command_completed 1186 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1187 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1188 1189 uint16_t opcode = little_endian_read_16(packet,3); 1190 if (opcode == hci_reset.opcode){ 1191 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1192 return; 1193 } 1194 } 1195 1196 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1197 // fix: Correct substate and behave as command below 1198 if (command_completed){ 1199 switch (hci_stack->substate){ 1200 case HCI_INIT_SEND_RESET: 1201 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1202 break; 1203 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1204 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1205 break; 1206 default: 1207 break; 1208 } 1209 } 1210 1211 1212 if (!command_completed) return; 1213 1214 int need_baud_change = hci_stack->config 1215 && hci_stack->chipset 1216 && hci_stack->chipset->set_baudrate_command 1217 && hci_stack->hci_transport->set_baudrate 1218 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1219 1220 int need_addr_change = hci_stack->custom_bd_addr_set 1221 && hci_stack->chipset 1222 && hci_stack->chipset->set_bd_addr_command; 1223 1224 switch(hci_stack->substate){ 1225 case HCI_INIT_SEND_RESET: 1226 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1227 // fix: just correct substate and behave as command below 1228 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1229 btstack_run_loop_remove_timer(&hci_stack->timeout); 1230 break; 1231 case HCI_INIT_W4_SEND_RESET: 1232 btstack_run_loop_remove_timer(&hci_stack->timeout); 1233 break; 1234 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1235 log_info("Received local version info, need baud change %u", need_baud_change); 1236 if (need_baud_change){ 1237 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1238 return; 1239 } 1240 // skip baud change 1241 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1242 return; 1243 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1244 // for STLC2500D, baud rate change already happened. 1245 // for others, baud rate gets changed now 1246 if (hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS){ 1247 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1248 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1249 hci_stack->hci_transport->set_baudrate(baud_rate); 1250 } 1251 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1252 return; 1253 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1254 btstack_run_loop_remove_timer(&hci_stack->timeout); 1255 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1256 return; 1257 case HCI_INIT_W4_CUSTOM_INIT: 1258 // repeat custom init 1259 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1260 return; 1261 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1262 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1263 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1264 return; 1265 } 1266 if (need_addr_change){ 1267 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1268 return; 1269 } 1270 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1271 return; 1272 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: { 1273 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1274 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1275 hci_stack->hci_transport->set_baudrate(baud_rate); 1276 if (need_addr_change){ 1277 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1278 return; 1279 } 1280 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1281 return; 1282 } 1283 case HCI_INIT_W4_SET_BD_ADDR: 1284 // for STLC2500D, bd addr change only gets active after sending reset command 1285 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1286 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1287 return; 1288 } 1289 // skipping st warm boot 1290 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1291 return; 1292 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1293 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1294 return; 1295 case HCI_INIT_W4_READ_BD_ADDR: 1296 // only read buffer size if supported 1297 if (hci_stack->local_supported_commands[0] & 0x01) { 1298 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1299 return; 1300 } 1301 // skipping read buffer size 1302 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1303 return; 1304 case HCI_INIT_W4_SET_EVENT_MASK: 1305 // skip Classic init commands for LE only chipsets 1306 if (!hci_classic_supported()){ 1307 if (hci_le_supported()){ 1308 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1309 return; 1310 } else { 1311 log_error("Neither BR/EDR nor LE supported"); 1312 hci_init_done(); 1313 return; 1314 } 1315 } 1316 if (!gap_ssp_supported()){ 1317 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1318 return; 1319 } 1320 break; 1321 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1322 break; 1323 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1324 // skip write le host if not supported (e.g. on LE only EM9301) 1325 if (hci_stack->local_supported_commands[0] & 0x02) break; 1326 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1327 return; 1328 1329 #ifdef ENABLE_SCO_OVER_HCI 1330 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1331 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1332 break; 1333 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1334 if (!hci_le_supported()){ 1335 // SKIP LE init for Classic only configuration 1336 hci_init_done(); 1337 return; 1338 } 1339 break; 1340 #else 1341 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1342 if (!hci_le_supported()){ 1343 // SKIP LE init for Classic only configuration 1344 hci_init_done(); 1345 return; 1346 } 1347 #endif 1348 break; 1349 // Response to command before init done state -> init done 1350 case (HCI_INIT_DONE-1): 1351 hci_init_done(); 1352 return; 1353 1354 default: 1355 break; 1356 } 1357 hci_initializing_next_state(); 1358 } 1359 1360 static void event_handler(uint8_t *packet, int size){ 1361 1362 uint16_t event_length = packet[1]; 1363 1364 // assert packet is complete 1365 if (size != event_length + 2){ 1366 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1367 return; 1368 } 1369 1370 bd_addr_t addr; 1371 bd_addr_type_t addr_type; 1372 uint8_t link_type; 1373 hci_con_handle_t handle; 1374 hci_connection_t * conn; 1375 int i; 1376 1377 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1378 1379 switch (hci_event_packet_get_type(packet)) { 1380 1381 case HCI_EVENT_COMMAND_COMPLETE: 1382 // get num cmd packets 1383 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1384 hci_stack->num_cmd_packets = packet[2]; 1385 1386 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1387 // from offset 5 1388 // status 1389 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1390 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1391 hci_stack->sco_data_packet_length = packet[8]; 1392 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1393 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1394 1395 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1396 // determine usable ACL payload size 1397 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1398 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1399 } 1400 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1401 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1402 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1403 } 1404 } 1405 #ifdef ENABLE_BLE 1406 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1407 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1408 hci_stack->le_acl_packets_total_num = packet[8]; 1409 // determine usable ACL payload size 1410 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1411 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1412 } 1413 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1414 } 1415 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1416 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1417 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1418 } 1419 #endif 1420 // Dump local address 1421 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1422 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1423 hci_stack->local_bd_addr); 1424 log_info("Local Address, Status: 0x%02x: Addr: %s", 1425 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1426 } 1427 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1428 hci_emit_discoverable_enabled(hci_stack->discoverable); 1429 } 1430 // Note: HCI init checks 1431 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1432 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1433 1434 // determine usable ACL packet types based on host buffer size and supported features 1435 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1436 log_info("packet types %04x", hci_stack->packet_types); 1437 1438 // Classic/LE 1439 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1440 } 1441 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1442 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1443 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1444 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1445 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1446 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1447 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1448 // notify app 1449 if (hci_stack->local_version_information_callback){ 1450 hci_stack->local_version_information_callback(packet); 1451 } 1452 } 1453 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1454 hci_stack->local_supported_commands[0] = 1455 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1456 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1457 } 1458 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1459 if (packet[5] == 0){ 1460 hci_stack->synchronous_flow_control_enabled = 1; 1461 } 1462 } 1463 break; 1464 1465 case HCI_EVENT_COMMAND_STATUS: 1466 // get num cmd packets 1467 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1468 hci_stack->num_cmd_packets = packet[3]; 1469 break; 1470 1471 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1472 int offset = 3; 1473 for (i=0; i<packet[2];i++){ 1474 handle = little_endian_read_16(packet, offset); 1475 offset += 2; 1476 uint16_t num_packets = little_endian_read_16(packet, offset); 1477 offset += 2; 1478 1479 conn = hci_connection_for_handle(handle); 1480 if (!conn){ 1481 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1482 continue; 1483 } 1484 1485 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1486 if (conn->num_sco_packets_sent >= num_packets){ 1487 conn->num_sco_packets_sent -= num_packets; 1488 } else { 1489 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1490 conn->num_sco_packets_sent = 0; 1491 } 1492 hci_notify_if_sco_can_send_now(); 1493 } else { 1494 if (conn->num_acl_packets_sent >= num_packets){ 1495 conn->num_acl_packets_sent -= num_packets; 1496 } else { 1497 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1498 conn->num_acl_packets_sent = 0; 1499 } 1500 } 1501 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1502 } 1503 break; 1504 } 1505 case HCI_EVENT_CONNECTION_REQUEST: 1506 reverse_bd_addr(&packet[2], addr); 1507 // TODO: eval COD 8-10 1508 link_type = packet[11]; 1509 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1510 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1511 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1512 if (!conn) { 1513 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1514 } 1515 if (!conn) { 1516 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1517 hci_stack->decline_reason = 0x0d; 1518 bd_addr_copy(hci_stack->decline_addr, addr); 1519 break; 1520 } 1521 conn->role = HCI_ROLE_SLAVE; 1522 conn->state = RECEIVED_CONNECTION_REQUEST; 1523 // store info about eSCO 1524 if (link_type == 0x02){ 1525 conn->remote_supported_feature_eSCO = 1; 1526 } 1527 hci_run(); 1528 break; 1529 1530 case HCI_EVENT_CONNECTION_COMPLETE: 1531 // Connection management 1532 reverse_bd_addr(&packet[5], addr); 1533 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1534 addr_type = BD_ADDR_TYPE_CLASSIC; 1535 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1536 if (conn) { 1537 if (!packet[2]){ 1538 conn->state = OPEN; 1539 conn->con_handle = little_endian_read_16(packet, 3); 1540 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1541 1542 // restart timer 1543 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1544 btstack_run_loop_add_timer(&conn->timeout); 1545 1546 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1547 1548 hci_emit_nr_connections_changed(); 1549 } else { 1550 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1551 uint8_t status = packet[2]; 1552 bd_addr_t bd_address; 1553 memcpy(&bd_address, conn->address, 6); 1554 1555 // connection failed, remove entry 1556 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1557 btstack_memory_hci_connection_free( conn ); 1558 1559 // notify client if dedicated bonding 1560 if (notify_dedicated_bonding_failed){ 1561 log_info("hci notify_dedicated_bonding_failed"); 1562 hci_emit_dedicated_bonding_result(bd_address, status); 1563 } 1564 1565 // if authentication error, also delete link key 1566 if (packet[2] == 0x05) { 1567 gap_drop_link_key_for_bd_addr(addr); 1568 } 1569 } 1570 } 1571 break; 1572 1573 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1574 reverse_bd_addr(&packet[5], addr); 1575 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1576 if (packet[2]){ 1577 // connection failed 1578 break; 1579 } 1580 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1581 if (!conn) { 1582 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1583 } 1584 if (!conn) { 1585 break; 1586 } 1587 conn->state = OPEN; 1588 conn->con_handle = little_endian_read_16(packet, 3); 1589 break; 1590 1591 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1592 handle = little_endian_read_16(packet, 3); 1593 conn = hci_connection_for_handle(handle); 1594 if (!conn) break; 1595 if (!packet[2]){ 1596 uint8_t * features = &packet[5]; 1597 if (features[6] & (1 << 3)){ 1598 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1599 } 1600 if (features[3] & (1<<7)){ 1601 conn->remote_supported_feature_eSCO = 1; 1602 } 1603 } 1604 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1605 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1606 if (conn->bonding_flags & BONDING_DEDICATED){ 1607 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1608 } 1609 break; 1610 1611 case HCI_EVENT_LINK_KEY_REQUEST: 1612 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1613 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1614 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1615 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1616 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1617 hci_run(); 1618 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1619 return; 1620 1621 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1622 reverse_bd_addr(&packet[2], addr); 1623 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1624 if (!conn) break; 1625 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1626 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1627 // Change Connection Encryption keeps link key type 1628 if (link_key_type != CHANGED_COMBINATION_KEY){ 1629 conn->link_key_type = link_key_type; 1630 } 1631 if (!hci_stack->link_key_db) break; 1632 hci_stack->link_key_db->put_link_key(addr, &packet[8], conn->link_key_type); 1633 // still forward event to allow dismiss of pairing dialog 1634 break; 1635 } 1636 1637 case HCI_EVENT_PIN_CODE_REQUEST: 1638 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1639 // non-bondable mode: pin code negative reply will be sent 1640 if (!hci_stack->bondable){ 1641 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1642 hci_run(); 1643 return; 1644 } 1645 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1646 if (!hci_stack->link_key_db) break; 1647 hci_event_pin_code_request_get_bd_addr(packet, addr); 1648 hci_stack->link_key_db->delete_link_key(addr); 1649 break; 1650 1651 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1652 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1653 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1654 break; 1655 1656 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1657 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1658 if (!hci_stack->ssp_auto_accept) break; 1659 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1660 break; 1661 1662 case HCI_EVENT_USER_PASSKEY_REQUEST: 1663 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1664 if (!hci_stack->ssp_auto_accept) break; 1665 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1666 break; 1667 1668 case HCI_EVENT_ENCRYPTION_CHANGE: 1669 handle = little_endian_read_16(packet, 3); 1670 conn = hci_connection_for_handle(handle); 1671 if (!conn) break; 1672 if (packet[2] == 0) { 1673 if (packet[5]){ 1674 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1675 } else { 1676 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1677 } 1678 } 1679 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1680 break; 1681 1682 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1683 handle = little_endian_read_16(packet, 3); 1684 conn = hci_connection_for_handle(handle); 1685 if (!conn) break; 1686 1687 // dedicated bonding: send result and disconnect 1688 if (conn->bonding_flags & BONDING_DEDICATED){ 1689 conn->bonding_flags &= ~BONDING_DEDICATED; 1690 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1691 conn->bonding_status = packet[2]; 1692 break; 1693 } 1694 1695 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1696 // link key sufficient for requested security 1697 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1698 break; 1699 } 1700 // not enough 1701 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1702 break; 1703 1704 // HCI_EVENT_DISCONNECTION_COMPLETE 1705 // has been split, to first notify stack before shutting connection down 1706 // see end of function, too. 1707 case HCI_EVENT_DISCONNECTION_COMPLETE: 1708 if (packet[2]) break; // status != 0 1709 handle = little_endian_read_16(packet, 3); 1710 conn = hci_connection_for_handle(handle); 1711 if (!conn) break; // no conn struct anymore 1712 // re-enable advertisements for le connections if active 1713 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1714 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1715 } 1716 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1717 break; 1718 1719 case HCI_EVENT_HARDWARE_ERROR: 1720 if (hci_stack->hardware_error_callback){ 1721 (*hci_stack->hardware_error_callback)(); 1722 } else { 1723 // if no special requests, just reboot stack 1724 hci_power_control_off(); 1725 hci_power_control_on(); 1726 } 1727 break; 1728 1729 case HCI_EVENT_ROLE_CHANGE: 1730 if (packet[2]) break; // status != 0 1731 handle = little_endian_read_16(packet, 3); 1732 conn = hci_connection_for_handle(handle); 1733 if (!conn) break; // no conn 1734 conn->role = packet[9]; 1735 break; 1736 1737 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1738 // release packet buffer only for asynchronous transport and if there are not further fragements 1739 if (hci_transport_synchronous()) { 1740 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1741 return; // instead of break: to avoid re-entering hci_run() 1742 } 1743 if (hci_stack->acl_fragmentation_total_size) break; 1744 hci_release_packet_buffer(); 1745 1746 // L2CAP receives this event via the hci_emit_event below 1747 1748 // For SCO, we do the can_send_now_check here 1749 hci_notify_if_sco_can_send_now(); 1750 break; 1751 1752 case HCI_EVENT_SCO_CAN_SEND_NOW: 1753 // For SCO, we do the can_send_now_check here 1754 hci_notify_if_sco_can_send_now(); 1755 return; 1756 1757 #ifdef ENABLE_BLE 1758 case HCI_EVENT_LE_META: 1759 switch (packet[2]){ 1760 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1761 // log_info("advertising report received"); 1762 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1763 le_handle_advertisement_report(packet, size); 1764 break; 1765 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1766 // Connection management 1767 reverse_bd_addr(&packet[8], addr); 1768 addr_type = (bd_addr_type_t)packet[7]; 1769 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1770 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1771 // if auto-connect, remove from whitelist in both roles 1772 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1773 hci_remove_from_whitelist(addr_type, addr); 1774 } 1775 // handle error: error is reported only to the initiator -> outgoing connection 1776 if (packet[3]){ 1777 // outgoing connection establishment is done 1778 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1779 // remove entry 1780 if (conn){ 1781 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1782 btstack_memory_hci_connection_free( conn ); 1783 } 1784 break; 1785 } 1786 // on success, both hosts receive connection complete event 1787 if (packet[6] == HCI_ROLE_MASTER){ 1788 // if we're master, it was an outgoing connection and we're done with it 1789 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1790 } else { 1791 // if we're slave, it was an incoming connection, advertisements have stopped 1792 hci_stack->le_advertisements_active = 0; 1793 } 1794 // LE connections are auto-accepted, so just create a connection if there isn't one already 1795 if (!conn){ 1796 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1797 } 1798 // no memory, sorry. 1799 if (!conn){ 1800 break; 1801 } 1802 1803 conn->state = OPEN; 1804 conn->role = packet[6]; 1805 conn->con_handle = little_endian_read_16(packet, 4); 1806 1807 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1808 1809 // restart timer 1810 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1811 // btstack_run_loop_add_timer(&conn->timeout); 1812 1813 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1814 1815 hci_emit_nr_connections_changed(); 1816 break; 1817 1818 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1819 1820 default: 1821 break; 1822 } 1823 break; 1824 #endif 1825 default: 1826 break; 1827 } 1828 1829 // handle BT initialization 1830 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1831 hci_initializing_event_handler(packet, size); 1832 } 1833 1834 // help with BT sleep 1835 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1836 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1837 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1838 hci_initializing_next_state(); 1839 } 1840 1841 // notify upper stack 1842 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1843 1844 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1845 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1846 if (!packet[2]){ 1847 handle = little_endian_read_16(packet, 3); 1848 hci_connection_t * aConn = hci_connection_for_handle(handle); 1849 if (aConn) { 1850 uint8_t status = aConn->bonding_status; 1851 uint16_t flags = aConn->bonding_flags; 1852 bd_addr_t bd_address; 1853 memcpy(&bd_address, aConn->address, 6); 1854 hci_shutdown_connection(aConn); 1855 // connection struct is gone, don't access anymore 1856 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1857 hci_emit_dedicated_bonding_result(bd_address, status); 1858 } 1859 } 1860 } 1861 } 1862 1863 // execute main loop 1864 hci_run(); 1865 } 1866 1867 static void sco_handler(uint8_t * packet, uint16_t size){ 1868 if (!hci_stack->sco_packet_handler) return; 1869 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1870 } 1871 1872 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1873 hci_dump_packet(packet_type, 1, packet, size); 1874 switch (packet_type) { 1875 case HCI_EVENT_PACKET: 1876 event_handler(packet, size); 1877 break; 1878 case HCI_ACL_DATA_PACKET: 1879 acl_handler(packet, size); 1880 break; 1881 case HCI_SCO_DATA_PACKET: 1882 sco_handler(packet, size); 1883 default: 1884 break; 1885 } 1886 } 1887 1888 /** 1889 * @brief Add event packet handler. 1890 */ 1891 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1892 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1893 } 1894 1895 1896 /** Register HCI packet handlers */ 1897 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 1898 hci_stack->acl_packet_handler = handler; 1899 } 1900 1901 /** 1902 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1903 */ 1904 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 1905 hci_stack->sco_packet_handler = handler; 1906 } 1907 1908 static void hci_state_reset(void){ 1909 // no connections yet 1910 hci_stack->connections = NULL; 1911 1912 // keep discoverable/connectable as this has been requested by the client(s) 1913 // hci_stack->discoverable = 0; 1914 // hci_stack->connectable = 0; 1915 // hci_stack->bondable = 1; 1916 1917 // buffer is free 1918 hci_stack->hci_packet_buffer_reserved = 0; 1919 1920 // no pending cmds 1921 hci_stack->decline_reason = 0; 1922 hci_stack->new_scan_enable_value = 0xff; 1923 1924 // LE 1925 hci_stack->adv_addr_type = 0; 1926 memset(hci_stack->adv_address, 0, 6); 1927 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1928 hci_stack->le_scan_type = 0xff; 1929 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1930 hci_stack->le_whitelist = 0; 1931 hci_stack->le_whitelist_capacity = 0; 1932 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1933 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1934 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1935 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1936 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1937 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1938 } 1939 1940 /** 1941 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1942 */ 1943 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1944 // store and open remote device db 1945 hci_stack->link_key_db = link_key_db; 1946 if (hci_stack->link_key_db) { 1947 hci_stack->link_key_db->open(); 1948 } 1949 } 1950 1951 void hci_init(const hci_transport_t *transport, const void *config){ 1952 1953 #ifdef HAVE_MALLOC 1954 if (!hci_stack) { 1955 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1956 } 1957 #else 1958 hci_stack = &hci_stack_static; 1959 #endif 1960 memset(hci_stack, 0, sizeof(hci_stack_t)); 1961 1962 // reference to use transport layer implementation 1963 hci_stack->hci_transport = transport; 1964 1965 // reference to used config 1966 hci_stack->config = config; 1967 1968 // max acl payload size defined in config.h 1969 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1970 1971 // register packet handlers with transport 1972 transport->register_packet_handler(&packet_handler); 1973 1974 hci_stack->state = HCI_STATE_OFF; 1975 1976 // class of device 1977 hci_stack->class_of_device = 0x007a020c; // Smartphone 1978 1979 // bondable by default 1980 hci_stack->bondable = 1; 1981 1982 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1983 hci_stack->ssp_enable = 1; 1984 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1985 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1986 hci_stack->ssp_auto_accept = 1; 1987 1988 // voice setting - signed 8 bit pcm data with CVSD over the air 1989 hci_stack->sco_voice_setting = 0x40; 1990 1991 hci_state_reset(); 1992 } 1993 1994 /** 1995 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 1996 */ 1997 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 1998 hci_stack->chipset = chipset_driver; 1999 2000 // reset chipset driver - init is also called on power_up 2001 if (hci_stack->chipset && hci_stack->chipset->init){ 2002 hci_stack->chipset->init(hci_stack->config); 2003 } 2004 } 2005 2006 /** 2007 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2008 */ 2009 void hci_set_control(const btstack_control_t *hardware_control){ 2010 // references to used control implementation 2011 hci_stack->control = hardware_control; 2012 // init with transport config 2013 hardware_control->init(hci_stack->config); 2014 } 2015 2016 void hci_close(void){ 2017 // close remote device db 2018 if (hci_stack->link_key_db) { 2019 hci_stack->link_key_db->close(); 2020 } 2021 while (hci_stack->connections) { 2022 // cancel all l2cap connections 2023 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 2024 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 2025 } 2026 hci_power_control(HCI_POWER_OFF); 2027 2028 #ifdef HAVE_MALLOC 2029 free(hci_stack); 2030 #endif 2031 hci_stack = NULL; 2032 } 2033 2034 void gap_set_class_of_device(uint32_t class_of_device){ 2035 hci_stack->class_of_device = class_of_device; 2036 } 2037 2038 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2039 void hci_set_bd_addr(bd_addr_t addr){ 2040 memcpy(hci_stack->custom_bd_addr, addr, 6); 2041 hci_stack->custom_bd_addr_set = 1; 2042 } 2043 2044 void hci_disable_l2cap_timeout_check(void){ 2045 disable_l2cap_timeouts = 1; 2046 } 2047 // State-Module-Driver overview 2048 // state module low-level 2049 // HCI_STATE_OFF off close 2050 // HCI_STATE_INITIALIZING, on open 2051 // HCI_STATE_WORKING, on open 2052 // HCI_STATE_HALTING, on open 2053 // HCI_STATE_SLEEPING, off/sleep close 2054 // HCI_STATE_FALLING_ASLEEP on open 2055 2056 static int hci_power_control_on(void){ 2057 2058 // power on 2059 int err = 0; 2060 if (hci_stack->control && hci_stack->control->on){ 2061 err = (*hci_stack->control->on)(); 2062 } 2063 if (err){ 2064 log_error( "POWER_ON failed"); 2065 hci_emit_hci_open_failed(); 2066 return err; 2067 } 2068 2069 // int chipset driver 2070 if (hci_stack->chipset && hci_stack->chipset->init){ 2071 hci_stack->chipset->init(hci_stack->config); 2072 } 2073 2074 // init transport 2075 if (hci_stack->hci_transport->init){ 2076 hci_stack->hci_transport->init(hci_stack->config); 2077 } 2078 2079 // open transport 2080 err = hci_stack->hci_transport->open(); 2081 if (err){ 2082 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2083 if (hci_stack->control && hci_stack->control->off){ 2084 (*hci_stack->control->off)(); 2085 } 2086 hci_emit_hci_open_failed(); 2087 return err; 2088 } 2089 return 0; 2090 } 2091 2092 static void hci_power_control_off(void){ 2093 2094 log_info("hci_power_control_off"); 2095 2096 // close low-level device 2097 hci_stack->hci_transport->close(); 2098 2099 log_info("hci_power_control_off - hci_transport closed"); 2100 2101 // power off 2102 if (hci_stack->control && hci_stack->control->off){ 2103 (*hci_stack->control->off)(); 2104 } 2105 2106 log_info("hci_power_control_off - control closed"); 2107 2108 hci_stack->state = HCI_STATE_OFF; 2109 } 2110 2111 static void hci_power_control_sleep(void){ 2112 2113 log_info("hci_power_control_sleep"); 2114 2115 #if 0 2116 // don't close serial port during sleep 2117 2118 // close low-level device 2119 hci_stack->hci_transport->close(hci_stack->config); 2120 #endif 2121 2122 // sleep mode 2123 if (hci_stack->control && hci_stack->control->sleep){ 2124 (*hci_stack->control->sleep)(); 2125 } 2126 2127 hci_stack->state = HCI_STATE_SLEEPING; 2128 } 2129 2130 static int hci_power_control_wake(void){ 2131 2132 log_info("hci_power_control_wake"); 2133 2134 // wake on 2135 if (hci_stack->control && hci_stack->control->wake){ 2136 (*hci_stack->control->wake)(); 2137 } 2138 2139 #if 0 2140 // open low-level device 2141 int err = hci_stack->hci_transport->open(hci_stack->config); 2142 if (err){ 2143 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2144 if (hci_stack->control && hci_stack->control->off){ 2145 (*hci_stack->control->off)(); 2146 } 2147 hci_emit_hci_open_failed(); 2148 return err; 2149 } 2150 #endif 2151 2152 return 0; 2153 } 2154 2155 static void hci_power_transition_to_initializing(void){ 2156 // set up state machine 2157 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2158 hci_stack->hci_packet_buffer_reserved = 0; 2159 hci_stack->state = HCI_STATE_INITIALIZING; 2160 hci_stack->substate = HCI_INIT_SEND_RESET; 2161 } 2162 2163 int hci_power_control(HCI_POWER_MODE power_mode){ 2164 2165 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2166 2167 int err = 0; 2168 switch (hci_stack->state){ 2169 2170 case HCI_STATE_OFF: 2171 switch (power_mode){ 2172 case HCI_POWER_ON: 2173 err = hci_power_control_on(); 2174 if (err) { 2175 log_error("hci_power_control_on() error %u", err); 2176 return err; 2177 } 2178 hci_power_transition_to_initializing(); 2179 break; 2180 case HCI_POWER_OFF: 2181 // do nothing 2182 break; 2183 case HCI_POWER_SLEEP: 2184 // do nothing (with SLEEP == OFF) 2185 break; 2186 } 2187 break; 2188 2189 case HCI_STATE_INITIALIZING: 2190 switch (power_mode){ 2191 case HCI_POWER_ON: 2192 // do nothing 2193 break; 2194 case HCI_POWER_OFF: 2195 // no connections yet, just turn it off 2196 hci_power_control_off(); 2197 break; 2198 case HCI_POWER_SLEEP: 2199 // no connections yet, just turn it off 2200 hci_power_control_sleep(); 2201 break; 2202 } 2203 break; 2204 2205 case HCI_STATE_WORKING: 2206 switch (power_mode){ 2207 case HCI_POWER_ON: 2208 // do nothing 2209 break; 2210 case HCI_POWER_OFF: 2211 // see hci_run 2212 hci_stack->state = HCI_STATE_HALTING; 2213 break; 2214 case HCI_POWER_SLEEP: 2215 // see hci_run 2216 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2217 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2218 break; 2219 } 2220 break; 2221 2222 case HCI_STATE_HALTING: 2223 switch (power_mode){ 2224 case HCI_POWER_ON: 2225 hci_power_transition_to_initializing(); 2226 break; 2227 case HCI_POWER_OFF: 2228 // do nothing 2229 break; 2230 case HCI_POWER_SLEEP: 2231 // see hci_run 2232 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2233 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2234 break; 2235 } 2236 break; 2237 2238 case HCI_STATE_FALLING_ASLEEP: 2239 switch (power_mode){ 2240 case HCI_POWER_ON: 2241 2242 #ifdef HAVE_PLATFORM_IPHONE_OS 2243 // nothing to do, if H4 supports power management 2244 if (btstack_control_iphone_power_management_enabled()){ 2245 hci_stack->state = HCI_STATE_INITIALIZING; 2246 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2247 break; 2248 } 2249 #endif 2250 hci_power_transition_to_initializing(); 2251 break; 2252 case HCI_POWER_OFF: 2253 // see hci_run 2254 hci_stack->state = HCI_STATE_HALTING; 2255 break; 2256 case HCI_POWER_SLEEP: 2257 // do nothing 2258 break; 2259 } 2260 break; 2261 2262 case HCI_STATE_SLEEPING: 2263 switch (power_mode){ 2264 case HCI_POWER_ON: 2265 2266 #ifdef HAVE_PLATFORM_IPHONE_OS 2267 // nothing to do, if H4 supports power management 2268 if (btstack_control_iphone_power_management_enabled()){ 2269 hci_stack->state = HCI_STATE_INITIALIZING; 2270 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2271 hci_update_scan_enable(); 2272 break; 2273 } 2274 #endif 2275 err = hci_power_control_wake(); 2276 if (err) return err; 2277 hci_power_transition_to_initializing(); 2278 break; 2279 case HCI_POWER_OFF: 2280 hci_stack->state = HCI_STATE_HALTING; 2281 break; 2282 case HCI_POWER_SLEEP: 2283 // do nothing 2284 break; 2285 } 2286 break; 2287 } 2288 2289 // create internal event 2290 hci_emit_state(); 2291 2292 // trigger next/first action 2293 hci_run(); 2294 2295 return 0; 2296 } 2297 2298 static void hci_update_scan_enable(void){ 2299 // 2 = page scan, 1 = inq scan 2300 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2301 hci_run(); 2302 } 2303 2304 void gap_discoverable_control(uint8_t enable){ 2305 if (enable) enable = 1; // normalize argument 2306 2307 if (hci_stack->discoverable == enable){ 2308 hci_emit_discoverable_enabled(hci_stack->discoverable); 2309 return; 2310 } 2311 2312 hci_stack->discoverable = enable; 2313 hci_update_scan_enable(); 2314 } 2315 2316 void gap_connectable_control(uint8_t enable){ 2317 if (enable) enable = 1; // normalize argument 2318 2319 // don't emit event 2320 if (hci_stack->connectable == enable) return; 2321 2322 hci_stack->connectable = enable; 2323 hci_update_scan_enable(); 2324 } 2325 2326 void gap_local_bd_addr(bd_addr_t address_buffer){ 2327 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2328 } 2329 2330 static void hci_run(void){ 2331 2332 // log_info("hci_run: entered"); 2333 btstack_linked_item_t * it; 2334 2335 // send continuation fragments first, as they block the prepared packet buffer 2336 if (hci_stack->acl_fragmentation_total_size > 0) { 2337 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2338 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2339 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2340 if (connection) { 2341 hci_send_acl_packet_fragments(connection); 2342 return; 2343 } 2344 // connection gone -> discard further fragments 2345 hci_stack->acl_fragmentation_total_size = 0; 2346 hci_stack->acl_fragmentation_pos = 0; 2347 } 2348 } 2349 2350 if (!hci_can_send_command_packet_now()) return; 2351 2352 // global/non-connection oriented commands 2353 2354 // decline incoming connections 2355 if (hci_stack->decline_reason){ 2356 uint8_t reason = hci_stack->decline_reason; 2357 hci_stack->decline_reason = 0; 2358 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2359 return; 2360 } 2361 2362 // send scan enable 2363 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2364 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2365 hci_stack->new_scan_enable_value = 0xff; 2366 return; 2367 } 2368 2369 #ifdef ENABLE_BLE 2370 if (hci_stack->state == HCI_STATE_WORKING){ 2371 // handle le scan 2372 switch(hci_stack->le_scanning_state){ 2373 case LE_START_SCAN: 2374 hci_stack->le_scanning_state = LE_SCANNING; 2375 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2376 return; 2377 2378 case LE_STOP_SCAN: 2379 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2380 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2381 return; 2382 default: 2383 break; 2384 } 2385 if (hci_stack->le_scan_type != 0xff){ 2386 // defaults: active scanning, accept all advertisement packets 2387 int scan_type = hci_stack->le_scan_type; 2388 hci_stack->le_scan_type = 0xff; 2389 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); 2390 return; 2391 } 2392 // le advertisement control 2393 if (hci_stack->le_advertisements_todo){ 2394 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2395 } 2396 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2397 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2398 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2399 return; 2400 } 2401 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2402 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2403 hci_send_cmd(&hci_le_set_advertising_parameters, 2404 hci_stack->le_advertisements_interval_min, 2405 hci_stack->le_advertisements_interval_max, 2406 hci_stack->le_advertisements_type, 2407 hci_stack->le_advertisements_own_address_type, 2408 hci_stack->le_advertisements_direct_address_type, 2409 hci_stack->le_advertisements_direct_address, 2410 hci_stack->le_advertisements_channel_map, 2411 hci_stack->le_advertisements_filter_policy); 2412 return; 2413 } 2414 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2415 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2416 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2417 hci_stack->le_advertisements_data); 2418 return; 2419 } 2420 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2421 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2422 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2423 hci_stack->le_scan_response_data); 2424 return; 2425 } 2426 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2427 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2428 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2429 return; 2430 } 2431 2432 // 2433 // LE Whitelist Management 2434 // 2435 2436 // check if whitelist needs modification 2437 btstack_linked_list_iterator_t lit; 2438 int modification_pending = 0; 2439 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2440 while (btstack_linked_list_iterator_has_next(&lit)){ 2441 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2442 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2443 modification_pending = 1; 2444 break; 2445 } 2446 } 2447 2448 if (modification_pending){ 2449 // stop connnecting if modification pending 2450 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2451 hci_send_cmd(&hci_le_create_connection_cancel); 2452 return; 2453 } 2454 2455 // add/remove entries 2456 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2457 while (btstack_linked_list_iterator_has_next(&lit)){ 2458 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2459 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2460 entry->state = LE_WHITELIST_ON_CONTROLLER; 2461 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2462 return; 2463 2464 } 2465 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2466 bd_addr_t address; 2467 bd_addr_type_t address_type = entry->address_type; 2468 memcpy(address, entry->address, 6); 2469 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2470 btstack_memory_whitelist_entry_free(entry); 2471 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2472 return; 2473 } 2474 } 2475 } 2476 2477 // start connecting 2478 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2479 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2480 bd_addr_t null_addr; 2481 memset(null_addr, 0, 6); 2482 hci_send_cmd(&hci_le_create_connection, 2483 0x0060, // scan interval: 60 ms 2484 0x0030, // scan interval: 30 ms 2485 1, // use whitelist 2486 0, // peer address type 2487 null_addr, // peer bd addr 2488 hci_stack->adv_addr_type, // our addr type: 2489 0x0008, // conn interval min 2490 0x0018, // conn interval max 2491 0, // conn latency 2492 0x0048, // supervision timeout 2493 0x0001, // min ce length 2494 0x0001 // max ce length 2495 ); 2496 return; 2497 } 2498 } 2499 #endif 2500 2501 // send pending HCI commands 2502 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2503 hci_connection_t * connection = (hci_connection_t *) it; 2504 2505 switch(connection->state){ 2506 case SEND_CREATE_CONNECTION: 2507 switch(connection->address_type){ 2508 case BD_ADDR_TYPE_CLASSIC: 2509 log_info("sending hci_create_connection"); 2510 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2511 break; 2512 default: 2513 #ifdef ENABLE_BLE 2514 log_info("sending hci_le_create_connection"); 2515 hci_send_cmd(&hci_le_create_connection, 2516 0x0060, // scan interval: 60 ms 2517 0x0030, // scan interval: 30 ms 2518 0, // don't use whitelist 2519 connection->address_type, // peer address type 2520 connection->address, // peer bd addr 2521 hci_stack->adv_addr_type, // our addr type: 2522 0x0008, // conn interval min 2523 0x0018, // conn interval max 2524 0, // conn latency 2525 0x0048, // supervision timeout 2526 0x0001, // min ce length 2527 0x0001 // max ce length 2528 ); 2529 2530 connection->state = SENT_CREATE_CONNECTION; 2531 #endif 2532 break; 2533 } 2534 return; 2535 2536 case RECEIVED_CONNECTION_REQUEST: 2537 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2538 connection->state = ACCEPTED_CONNECTION_REQUEST; 2539 connection->role = HCI_ROLE_SLAVE; 2540 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2541 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2542 } else { 2543 // remote supported feature eSCO is set if link type is eSCO 2544 uint16_t max_latency; 2545 uint8_t retransmission_effort; 2546 uint16_t packet_types; 2547 // remote supported feature eSCO is set if link type is eSCO 2548 if (connection->remote_supported_feature_eSCO){ 2549 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 2550 max_latency = 0x000c; 2551 retransmission_effort = 0x02; 2552 packet_types = 0x388; 2553 } else { 2554 // SCO: max latency, retransmission interval: N/A. any packet type 2555 max_latency = 0xffff; 2556 retransmission_effort = 0xff; 2557 packet_types = 0x003f; 2558 } 2559 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, max_latency, hci_stack->sco_voice_setting, retransmission_effort, packet_types); 2560 } 2561 return; 2562 2563 #ifdef ENABLE_BLE 2564 case SEND_CANCEL_CONNECTION: 2565 connection->state = SENT_CANCEL_CONNECTION; 2566 hci_send_cmd(&hci_le_create_connection_cancel); 2567 return; 2568 #endif 2569 case SEND_DISCONNECT: 2570 connection->state = SENT_DISCONNECT; 2571 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2572 return; 2573 2574 default: 2575 break; 2576 } 2577 2578 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2579 log_info("responding to link key request"); 2580 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2581 link_key_t link_key; 2582 link_key_type_t link_key_type; 2583 if ( hci_stack->link_key_db 2584 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2585 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2586 connection->link_key_type = link_key_type; 2587 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2588 } else { 2589 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2590 } 2591 return; 2592 } 2593 2594 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2595 log_info("denying to pin request"); 2596 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2597 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2598 return; 2599 } 2600 2601 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2602 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2603 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2604 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2605 // tweak authentication requirements 2606 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2607 if (connection->bonding_flags & BONDING_DEDICATED){ 2608 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2609 } 2610 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2611 authreq |= 1; 2612 } 2613 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2614 } else { 2615 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2616 } 2617 return; 2618 } 2619 2620 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2621 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2622 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2623 return; 2624 } 2625 2626 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2627 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2628 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2629 return; 2630 } 2631 2632 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2633 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2634 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2635 return; 2636 } 2637 2638 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2639 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2640 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2641 return; 2642 } 2643 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2644 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2645 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2646 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2647 return; 2648 } 2649 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2650 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2651 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2652 return; 2653 } 2654 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2655 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2656 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2657 return; 2658 } 2659 2660 #ifdef ENABLE_BLE 2661 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2662 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2663 2664 uint16_t connection_interval_min = connection->le_conn_interval_min; 2665 connection->le_conn_interval_min = 0; 2666 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2667 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2668 0x0000, 0xffff); 2669 } 2670 #endif 2671 } 2672 2673 hci_connection_t * connection; 2674 switch (hci_stack->state){ 2675 case HCI_STATE_INITIALIZING: 2676 hci_initializing_run(); 2677 break; 2678 2679 case HCI_STATE_HALTING: 2680 2681 log_info("HCI_STATE_HALTING"); 2682 2683 // free whitelist entries 2684 #ifdef ENABLE_BLE 2685 { 2686 btstack_linked_list_iterator_t lit; 2687 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2688 while (btstack_linked_list_iterator_has_next(&lit)){ 2689 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2690 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2691 btstack_memory_whitelist_entry_free(entry); 2692 } 2693 } 2694 #endif 2695 // close all open connections 2696 connection = (hci_connection_t *) hci_stack->connections; 2697 if (connection){ 2698 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2699 if (!hci_can_send_command_packet_now()) return; 2700 2701 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2702 2703 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2704 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2705 2706 // ... which would be ignored anyway as we shutdown (free) the connection now 2707 hci_shutdown_connection(connection); 2708 2709 // finally, send the disconnect command 2710 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2711 return; 2712 } 2713 log_info("HCI_STATE_HALTING, calling off"); 2714 2715 // switch mode 2716 hci_power_control_off(); 2717 2718 log_info("HCI_STATE_HALTING, emitting state"); 2719 hci_emit_state(); 2720 log_info("HCI_STATE_HALTING, done"); 2721 break; 2722 2723 case HCI_STATE_FALLING_ASLEEP: 2724 switch(hci_stack->substate) { 2725 case HCI_FALLING_ASLEEP_DISCONNECT: 2726 log_info("HCI_STATE_FALLING_ASLEEP"); 2727 // close all open connections 2728 connection = (hci_connection_t *) hci_stack->connections; 2729 2730 #ifdef HAVE_PLATFORM_IPHONE_OS 2731 // don't close connections, if H4 supports power management 2732 if (btstack_control_iphone_power_management_enabled()){ 2733 connection = NULL; 2734 } 2735 #endif 2736 if (connection){ 2737 2738 // send disconnect 2739 if (!hci_can_send_command_packet_now()) return; 2740 2741 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2742 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2743 2744 // send disconnected event right away - causes higher layer connections to get closed, too. 2745 hci_shutdown_connection(connection); 2746 return; 2747 } 2748 2749 if (hci_classic_supported()){ 2750 // disable page and inquiry scan 2751 if (!hci_can_send_command_packet_now()) return; 2752 2753 log_info("HCI_STATE_HALTING, disabling inq scans"); 2754 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2755 2756 // continue in next sub state 2757 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2758 break; 2759 } 2760 // fall through for ble-only chips 2761 2762 case HCI_FALLING_ASLEEP_COMPLETE: 2763 log_info("HCI_STATE_HALTING, calling sleep"); 2764 #ifdef HAVE_PLATFORM_IPHONE_OS 2765 // don't actually go to sleep, if H4 supports power management 2766 if (btstack_control_iphone_power_management_enabled()){ 2767 // SLEEP MODE reached 2768 hci_stack->state = HCI_STATE_SLEEPING; 2769 hci_emit_state(); 2770 break; 2771 } 2772 #endif 2773 // switch mode 2774 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2775 hci_emit_state(); 2776 break; 2777 2778 default: 2779 break; 2780 } 2781 break; 2782 2783 default: 2784 break; 2785 } 2786 } 2787 2788 int hci_send_cmd_packet(uint8_t *packet, int size){ 2789 bd_addr_t addr; 2790 hci_connection_t * conn; 2791 // house-keeping 2792 2793 // create_connection? 2794 if (IS_COMMAND(packet, hci_create_connection)){ 2795 reverse_bd_addr(&packet[3], addr); 2796 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2797 2798 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2799 if (!conn){ 2800 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2801 if (!conn){ 2802 // notify client that alloc failed 2803 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2804 return 0; // don't sent packet to controller 2805 } 2806 conn->state = SEND_CREATE_CONNECTION; 2807 } 2808 log_info("conn state %u", conn->state); 2809 switch (conn->state){ 2810 // if connection active exists 2811 case OPEN: 2812 // and OPEN, emit connection complete command, don't send to controller 2813 hci_emit_connection_complete(conn, 0); 2814 return 0; 2815 case SEND_CREATE_CONNECTION: 2816 // connection created by hci, e.g. dedicated bonding 2817 break; 2818 default: 2819 // otherwise, just ignore as it is already in the open process 2820 return 0; 2821 } 2822 conn->state = SENT_CREATE_CONNECTION; 2823 } 2824 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2825 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2826 } 2827 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2828 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2829 } 2830 2831 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2832 if (hci_stack->link_key_db){ 2833 reverse_bd_addr(&packet[3], addr); 2834 hci_stack->link_key_db->delete_link_key(addr); 2835 } 2836 } 2837 2838 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2839 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2840 reverse_bd_addr(&packet[3], addr); 2841 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2842 if (conn){ 2843 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2844 } 2845 } 2846 2847 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2848 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2849 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2850 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2851 reverse_bd_addr(&packet[3], addr); 2852 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2853 if (conn){ 2854 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2855 } 2856 } 2857 2858 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2859 hci_stack->loopback_mode = packet[3]; 2860 } 2861 2862 #ifdef ENABLE_BLE 2863 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2864 hci_stack->adv_addr_type = packet[8]; 2865 } 2866 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2867 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2868 } 2869 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2870 hci_stack->le_advertisements_active = packet[3]; 2871 } 2872 if (IS_COMMAND(packet, hci_le_create_connection)){ 2873 // white list used? 2874 uint8_t initiator_filter_policy = packet[7]; 2875 switch (initiator_filter_policy){ 2876 case 0: 2877 // whitelist not used 2878 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2879 break; 2880 case 1: 2881 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2882 break; 2883 default: 2884 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2885 break; 2886 } 2887 } 2888 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2889 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2890 } 2891 #endif 2892 2893 hci_stack->num_cmd_packets--; 2894 2895 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2896 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2897 2898 // release packet buffer for synchronous transport implementations 2899 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2900 hci_stack->hci_packet_buffer_reserved = 0; 2901 } 2902 2903 return err; 2904 } 2905 2906 // disconnect because of security block 2907 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2908 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2909 if (!connection) return; 2910 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2911 } 2912 2913 2914 // Configure Secure Simple Pairing 2915 2916 // enable will enable SSP during init 2917 void gap_ssp_set_enable(int enable){ 2918 hci_stack->ssp_enable = enable; 2919 } 2920 2921 static int hci_local_ssp_activated(void){ 2922 return gap_ssp_supported() && hci_stack->ssp_enable; 2923 } 2924 2925 // if set, BTstack will respond to io capability request using authentication requirement 2926 void gap_ssp_set_io_capability(int io_capability){ 2927 hci_stack->ssp_io_capability = io_capability; 2928 } 2929 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 2930 hci_stack->ssp_authentication_requirement = authentication_requirement; 2931 } 2932 2933 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2934 void gap_ssp_set_auto_accept(int auto_accept){ 2935 hci_stack->ssp_auto_accept = auto_accept; 2936 } 2937 2938 /** 2939 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2940 */ 2941 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2942 2943 if (!hci_can_send_command_packet_now()){ 2944 log_error("hci_send_cmd called but cannot send packet now"); 2945 return 0; 2946 } 2947 2948 // for HCI INITIALIZATION 2949 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2950 hci_stack->last_cmd_opcode = cmd->opcode; 2951 2952 hci_reserve_packet_buffer(); 2953 uint8_t * packet = hci_stack->hci_packet_buffer; 2954 2955 va_list argptr; 2956 va_start(argptr, cmd); 2957 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 2958 va_end(argptr); 2959 2960 return hci_send_cmd_packet(packet, size); 2961 } 2962 2963 // Create various non-HCI events. 2964 // TODO: generalize, use table similar to hci_create_command 2965 2966 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 2967 // dump packet 2968 if (dump) { 2969 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 2970 } 2971 2972 // dispatch to all event handlers 2973 btstack_linked_list_iterator_t it; 2974 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 2975 while (btstack_linked_list_iterator_has_next(&it)){ 2976 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 2977 entry->callback(HCI_EVENT_PACKET, 0, event, size); 2978 } 2979 } 2980 2981 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 2982 if (!hci_stack->acl_packet_handler) return; 2983 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 2984 } 2985 2986 static void hci_notify_if_sco_can_send_now(void){ 2987 // notify SCO sender if waiting 2988 if (!hci_stack->sco_waiting_for_can_send_now) return; 2989 if (hci_can_send_sco_packet_now()){ 2990 hci_stack->sco_waiting_for_can_send_now = 0; 2991 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 2992 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 2993 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2994 } 2995 } 2996 2997 void hci_emit_state(void){ 2998 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2999 uint8_t event[3]; 3000 event[0] = BTSTACK_EVENT_STATE; 3001 event[1] = sizeof(event) - 2; 3002 event[2] = hci_stack->state; 3003 hci_emit_event(event, sizeof(event), 1); 3004 } 3005 3006 static void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 3007 uint8_t event[13]; 3008 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3009 event[1] = sizeof(event) - 2; 3010 event[2] = status; 3011 little_endian_store_16(event, 3, conn->con_handle); 3012 reverse_bd_addr(conn->address, &event[5]); 3013 event[11] = 1; // ACL connection 3014 event[12] = 0; // encryption disabled 3015 hci_emit_event(event, sizeof(event), 1); 3016 } 3017 3018 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3019 uint8_t event[21]; 3020 event[0] = HCI_EVENT_LE_META; 3021 event[1] = sizeof(event) - 2; 3022 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3023 event[3] = status; 3024 little_endian_store_16(event, 4, con_handle); 3025 event[6] = 0; // TODO: role 3026 event[7] = address_type; 3027 reverse_bd_addr(address, &event[8]); 3028 little_endian_store_16(event, 14, 0); // interval 3029 little_endian_store_16(event, 16, 0); // latency 3030 little_endian_store_16(event, 18, 0); // supervision timeout 3031 event[20] = 0; // master clock accuracy 3032 hci_emit_event(event, sizeof(event), 1); 3033 } 3034 3035 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3036 uint8_t event[6]; 3037 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3038 event[1] = sizeof(event) - 2; 3039 event[2] = 0; // status = OK 3040 little_endian_store_16(event, 3, con_handle); 3041 event[5] = reason; 3042 hci_emit_event(event, sizeof(event), 1); 3043 } 3044 3045 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3046 if (disable_l2cap_timeouts) return; 3047 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3048 uint8_t event[4]; 3049 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3050 event[1] = sizeof(event) - 2; 3051 little_endian_store_16(event, 2, conn->con_handle); 3052 hci_emit_event(event, sizeof(event), 1); 3053 } 3054 3055 static void hci_emit_nr_connections_changed(void){ 3056 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3057 uint8_t event[3]; 3058 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3059 event[1] = sizeof(event) - 2; 3060 event[2] = nr_hci_connections(); 3061 hci_emit_event(event, sizeof(event), 1); 3062 } 3063 3064 static void hci_emit_hci_open_failed(void){ 3065 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3066 uint8_t event[2]; 3067 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3068 event[1] = sizeof(event) - 2; 3069 hci_emit_event(event, sizeof(event), 1); 3070 } 3071 3072 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3073 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3074 uint8_t event[3]; 3075 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3076 event[1] = sizeof(event) - 2; 3077 event[2] = enabled; 3078 hci_emit_event(event, sizeof(event), 1); 3079 } 3080 3081 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3082 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3083 uint8_t event[5]; 3084 int pos = 0; 3085 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3086 event[pos++] = sizeof(event) - 2; 3087 little_endian_store_16(event, 2, con_handle); 3088 pos += 2; 3089 event[pos++] = level; 3090 hci_emit_event(event, sizeof(event), 1); 3091 } 3092 3093 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3094 log_info("hci_emit_dedicated_bonding_result %u ", status); 3095 uint8_t event[9]; 3096 int pos = 0; 3097 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3098 event[pos++] = sizeof(event) - 2; 3099 event[pos++] = status; 3100 reverse_bd_addr(address, &event[pos]); 3101 pos += 6; 3102 hci_emit_event(event, sizeof(event), 1); 3103 } 3104 3105 // query if remote side supports eSCO 3106 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3107 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3108 if (!connection) return 0; 3109 return connection->remote_supported_feature_eSCO; 3110 } 3111 3112 // query if remote side supports SSP 3113 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3114 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3115 if (!connection) return 0; 3116 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3117 } 3118 3119 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3120 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3121 } 3122 3123 // GAP API 3124 /** 3125 * @bbrief enable/disable bonding. default is enabled 3126 * @praram enabled 3127 */ 3128 void gap_set_bondable_mode(int enable){ 3129 hci_stack->bondable = enable ? 1 : 0; 3130 } 3131 /** 3132 * @brief Get bondable mode. 3133 * @return 1 if bondable 3134 */ 3135 int gap_get_bondable_mode(void){ 3136 return hci_stack->bondable; 3137 } 3138 3139 /** 3140 * @brief map link keys to security levels 3141 */ 3142 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3143 switch (link_key_type){ 3144 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3145 return LEVEL_4; 3146 case COMBINATION_KEY: 3147 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3148 return LEVEL_3; 3149 default: 3150 return LEVEL_2; 3151 } 3152 } 3153 3154 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3155 if (!connection) return LEVEL_0; 3156 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3157 return gap_security_level_for_link_key_type(connection->link_key_type); 3158 } 3159 3160 3161 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3162 log_info("gap_mitm_protection_required_for_security_level %u", level); 3163 return level > LEVEL_2; 3164 } 3165 3166 /** 3167 * @brief get current security level 3168 */ 3169 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3170 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3171 if (!connection) return LEVEL_0; 3172 return gap_security_level_for_connection(connection); 3173 } 3174 3175 /** 3176 * @brief request connection to device to 3177 * @result GAP_AUTHENTICATION_RESULT 3178 */ 3179 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3180 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3181 if (!connection){ 3182 hci_emit_security_level(con_handle, LEVEL_0); 3183 return; 3184 } 3185 gap_security_level_t current_level = gap_security_level(con_handle); 3186 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3187 if (current_level >= requested_level){ 3188 hci_emit_security_level(con_handle, current_level); 3189 return; 3190 } 3191 3192 connection->requested_security_level = requested_level; 3193 3194 #if 0 3195 // sending encryption request without a link key results in an error. 3196 // TODO: figure out how to use it properly 3197 3198 // would enabling ecnryption suffice (>= LEVEL_2)? 3199 if (hci_stack->link_key_db){ 3200 link_key_type_t link_key_type; 3201 link_key_t link_key; 3202 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3203 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3204 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3205 return; 3206 } 3207 } 3208 } 3209 #endif 3210 3211 // try to authenticate connection 3212 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3213 hci_run(); 3214 } 3215 3216 /** 3217 * @brief start dedicated bonding with device. disconnect after bonding 3218 * @param device 3219 * @param request MITM protection 3220 * @result GAP_DEDICATED_BONDING_COMPLETE 3221 */ 3222 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3223 3224 // create connection state machine 3225 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3226 3227 if (!connection){ 3228 return BTSTACK_MEMORY_ALLOC_FAILED; 3229 } 3230 3231 // delete linkn key 3232 gap_drop_link_key_for_bd_addr(device); 3233 3234 // configure LEVEL_2/3, dedicated bonding 3235 connection->state = SEND_CREATE_CONNECTION; 3236 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3237 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3238 connection->bonding_flags = BONDING_DEDICATED; 3239 3240 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3241 3242 // handle: connnection failure (connection complete != ok) 3243 // handle: authentication failure 3244 // handle: disconnect on done 3245 3246 hci_run(); 3247 3248 return 0; 3249 } 3250 3251 void gap_set_local_name(const char * local_name){ 3252 hci_stack->local_name = local_name; 3253 } 3254 3255 void gap_start_scan(void){ 3256 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3257 hci_stack->le_scanning_state = LE_START_SCAN; 3258 hci_run(); 3259 } 3260 3261 void gap_stop_scan(void){ 3262 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3263 hci_stack->le_scanning_state = LE_STOP_SCAN; 3264 hci_run(); 3265 } 3266 3267 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3268 hci_stack->le_scan_type = scan_type; 3269 hci_stack->le_scan_interval = scan_interval; 3270 hci_stack->le_scan_window = scan_window; 3271 hci_run(); 3272 } 3273 3274 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3275 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3276 if (!conn){ 3277 log_info("gap_connect: no connection exists yet, creating context"); 3278 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3279 if (!conn){ 3280 // notify client that alloc failed 3281 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3282 log_info("gap_connect: failed to alloc hci_connection_t"); 3283 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3284 } 3285 conn->state = SEND_CREATE_CONNECTION; 3286 log_info("gap_connect: send create connection next"); 3287 hci_run(); 3288 return 0; 3289 } 3290 3291 if (!hci_is_le_connection(conn) || 3292 conn->state == SEND_CREATE_CONNECTION || 3293 conn->state == SENT_CREATE_CONNECTION) { 3294 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3295 log_error("gap_connect: classic connection or connect is already being created"); 3296 return GATT_CLIENT_IN_WRONG_STATE; 3297 } 3298 3299 log_info("gap_connect: context exists with state %u", conn->state); 3300 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3301 hci_run(); 3302 return 0; 3303 } 3304 3305 // @assumption: only a single outgoing LE Connection exists 3306 static hci_connection_t * gap_get_outgoing_connection(void){ 3307 btstack_linked_item_t *it; 3308 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3309 hci_connection_t * conn = (hci_connection_t *) it; 3310 if (!hci_is_le_connection(conn)) continue; 3311 switch (conn->state){ 3312 case SEND_CREATE_CONNECTION: 3313 case SENT_CREATE_CONNECTION: 3314 return conn; 3315 default: 3316 break; 3317 }; 3318 } 3319 return NULL; 3320 } 3321 3322 uint8_t gap_connect_cancel(void){ 3323 hci_connection_t * conn = gap_get_outgoing_connection(); 3324 if (!conn) return 0; 3325 switch (conn->state){ 3326 case SEND_CREATE_CONNECTION: 3327 // skip sending create connection and emit event instead 3328 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3329 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3330 btstack_memory_hci_connection_free( conn ); 3331 break; 3332 case SENT_CREATE_CONNECTION: 3333 // request to send cancel connection 3334 conn->state = SEND_CANCEL_CONNECTION; 3335 hci_run(); 3336 break; 3337 default: 3338 break; 3339 } 3340 return 0; 3341 } 3342 3343 /** 3344 * @brief Updates the connection parameters for a given LE connection 3345 * @param handle 3346 * @param conn_interval_min (unit: 1.25ms) 3347 * @param conn_interval_max (unit: 1.25ms) 3348 * @param conn_latency 3349 * @param supervision_timeout (unit: 10ms) 3350 * @returns 0 if ok 3351 */ 3352 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3353 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3354 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3355 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3356 connection->le_conn_interval_min = conn_interval_min; 3357 connection->le_conn_interval_max = conn_interval_max; 3358 connection->le_conn_latency = conn_latency; 3359 connection->le_supervision_timeout = supervision_timeout; 3360 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3361 hci_run(); 3362 return 0; 3363 } 3364 3365 /** 3366 * @brief Request an update of the connection parameter for a given LE connection 3367 * @param handle 3368 * @param conn_interval_min (unit: 1.25ms) 3369 * @param conn_interval_max (unit: 1.25ms) 3370 * @param conn_latency 3371 * @param supervision_timeout (unit: 10ms) 3372 * @returns 0 if ok 3373 */ 3374 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3375 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3376 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3377 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3378 connection->le_conn_interval_min = conn_interval_min; 3379 connection->le_conn_interval_max = conn_interval_max; 3380 connection->le_conn_latency = conn_latency; 3381 connection->le_supervision_timeout = supervision_timeout; 3382 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3383 hci_run(); 3384 return 0; 3385 } 3386 3387 static void gap_advertisments_changed(void){ 3388 // disable advertisements before updating adv, scan data, or adv params 3389 if (hci_stack->le_advertisements_active){ 3390 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3391 } 3392 hci_run(); 3393 } 3394 3395 /** 3396 * @brief Set Advertisement Data 3397 * @param advertising_data_length 3398 * @param advertising_data (max 31 octets) 3399 * @note data is not copied, pointer has to stay valid 3400 */ 3401 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3402 hci_stack->le_advertisements_data_len = advertising_data_length; 3403 hci_stack->le_advertisements_data = advertising_data; 3404 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3405 gap_advertisments_changed(); 3406 } 3407 3408 /** 3409 * @brief Set Scan Response Data 3410 * @param advertising_data_length 3411 * @param advertising_data (max 31 octets) 3412 * @note data is not copied, pointer has to stay valid 3413 */ 3414 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3415 hci_stack->le_scan_response_data_len = scan_response_data_length; 3416 hci_stack->le_scan_response_data = scan_response_data; 3417 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3418 gap_advertisments_changed(); 3419 } 3420 3421 /** 3422 * @brief Set Advertisement Parameters 3423 * @param adv_int_min 3424 * @param adv_int_max 3425 * @param adv_type 3426 * @param own_address_type 3427 * @param direct_address_type 3428 * @param direct_address 3429 * @param channel_map 3430 * @param filter_policy 3431 * 3432 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3433 */ 3434 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3435 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3436 uint8_t channel_map, uint8_t filter_policy) { 3437 3438 hci_stack->le_advertisements_interval_min = adv_int_min; 3439 hci_stack->le_advertisements_interval_max = adv_int_max; 3440 hci_stack->le_advertisements_type = adv_type; 3441 hci_stack->le_advertisements_own_address_type = own_address_type; 3442 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3443 hci_stack->le_advertisements_channel_map = channel_map; 3444 hci_stack->le_advertisements_filter_policy = filter_policy; 3445 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3446 3447 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3448 gap_advertisments_changed(); 3449 } 3450 3451 /** 3452 * @brief Enable/Disable Advertisements 3453 * @param enabled 3454 */ 3455 void gap_advertisements_enable(int enabled){ 3456 hci_stack->le_advertisements_enabled = enabled; 3457 if (enabled && !hci_stack->le_advertisements_active){ 3458 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3459 } 3460 if (!enabled && hci_stack->le_advertisements_active){ 3461 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3462 } 3463 hci_run(); 3464 } 3465 3466 3467 uint8_t gap_disconnect(hci_con_handle_t handle){ 3468 hci_connection_t * conn = hci_connection_for_handle(handle); 3469 if (!conn){ 3470 hci_emit_disconnection_complete(handle, 0); 3471 return 0; 3472 } 3473 conn->state = SEND_DISCONNECT; 3474 hci_run(); 3475 return 0; 3476 } 3477 3478 /** 3479 * @brief Get connection type 3480 * @param con_handle 3481 * @result connection_type 3482 */ 3483 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3484 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3485 if (!conn) return GAP_CONNECTION_INVALID; 3486 switch (conn->address_type){ 3487 case BD_ADDR_TYPE_LE_PUBLIC: 3488 case BD_ADDR_TYPE_LE_RANDOM: 3489 return GAP_CONNECTION_LE; 3490 case BD_ADDR_TYPE_SCO: 3491 return GAP_CONNECTION_SCO; 3492 case BD_ADDR_TYPE_CLASSIC: 3493 return GAP_CONNECTION_ACL; 3494 default: 3495 return GAP_CONNECTION_INVALID; 3496 } 3497 } 3498 3499 #ifdef ENABLE_BLE 3500 3501 /** 3502 * @brief Auto Connection Establishment - Start Connecting to device 3503 * @param address_typ 3504 * @param address 3505 * @returns 0 if ok 3506 */ 3507 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3508 // check capacity 3509 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3510 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3511 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3512 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3513 entry->address_type = address_type; 3514 memcpy(entry->address, address, 6); 3515 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3516 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3517 hci_run(); 3518 return 0; 3519 } 3520 3521 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3522 btstack_linked_list_iterator_t it; 3523 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3524 while (btstack_linked_list_iterator_has_next(&it)){ 3525 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3526 if (entry->address_type != address_type) continue; 3527 if (memcmp(entry->address, address, 6) != 0) continue; 3528 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3529 // remove from controller if already present 3530 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3531 continue; 3532 } 3533 // direclty remove entry from whitelist 3534 btstack_linked_list_iterator_remove(&it); 3535 btstack_memory_whitelist_entry_free(entry); 3536 } 3537 } 3538 3539 /** 3540 * @brief Auto Connection Establishment - Stop Connecting to device 3541 * @param address_typ 3542 * @param address 3543 * @returns 0 if ok 3544 */ 3545 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3546 hci_remove_from_whitelist(address_type, address); 3547 hci_run(); 3548 return 0; 3549 } 3550 3551 /** 3552 * @brief Auto Connection Establishment - Stop everything 3553 * @note Convenience function to stop all active auto connection attempts 3554 */ 3555 void gap_auto_connection_stop_all(void){ 3556 btstack_linked_list_iterator_t it; 3557 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3558 while (btstack_linked_list_iterator_has_next(&it)){ 3559 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3560 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3561 // remove from controller if already present 3562 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3563 continue; 3564 } 3565 // directly remove entry from whitelist 3566 btstack_linked_list_iterator_remove(&it); 3567 btstack_memory_whitelist_entry_free(entry); 3568 } 3569 hci_run(); 3570 } 3571 3572 #endif 3573 3574 /** 3575 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3576 */ 3577 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3578 hci_stack->sco_voice_setting = voice_setting; 3579 } 3580 3581 /** 3582 * @brief Get SCO Voice Setting 3583 * @return current voice setting 3584 */ 3585 uint16_t hci_get_sco_voice_setting(void){ 3586 return hci_stack->sco_voice_setting; 3587 } 3588 3589 /** @brief Get SCO packet length for current SCO Voice setting 3590 * @note Using SCO packets of the exact length is required for USB transfer 3591 * @return Length of SCO packets in bytes (not audio frames) 3592 */ 3593 int hci_get_sco_packet_length(void){ 3594 // see Core Spec for H2 USB Transfer. 3595 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3596 return 27; 3597 } 3598 3599 /** 3600 * @brief Set callback for Bluetooth Hardware Error 3601 */ 3602 void hci_set_hardware_error_callback(void (*fn)(void)){ 3603 hci_stack->hardware_error_callback = fn; 3604 } 3605 3606 /** 3607 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3608 * @note Can be used to select chipset driver dynamically during startup 3609 */ 3610 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3611 hci_stack->local_version_information_callback = fn; 3612 } 3613 3614 void hci_disconnect_all(void){ 3615 btstack_linked_list_iterator_t it; 3616 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3617 while (btstack_linked_list_iterator_has_next(&it)){ 3618 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3619 if (con->state == SENT_DISCONNECT) continue; 3620 con->state = SEND_DISCONNECT; 3621 } 3622 hci_run(); 3623 } 3624