1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef HAVE_EMBEDDED_TICK 49 #include "btstack_run_loop_embedded.h" 50 #endif 51 52 #ifdef HAVE_PLATFORM_IPHONE_OS 53 #include "../port/ios/src/btstack_control_iphone.h" 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #endif 59 60 #include <stdarg.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "gap.h" 70 #include "hci.h" 71 #include "hci_cmd.h" 72 #include "hci_dump.h" 73 74 75 #define HCI_CONNECTION_TIMEOUT_MS 10000 76 #define HCI_RESET_RESEND_TIMEOUT_MS 200 77 78 // prototypes 79 static void hci_update_scan_enable(void); 80 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 81 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 82 static void hci_connection_timestamp(hci_connection_t *connection); 83 static int hci_power_control_on(void); 84 static void hci_power_control_off(void); 85 static void hci_state_reset(void); 86 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 87 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 88 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 89 static void hci_emit_nr_connections_changed(void); 90 static void hci_emit_hci_open_failed(void); 91 static void hci_emit_discoverable_enabled(uint8_t enabled); 92 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 93 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 94 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 95 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 96 static void hci_notify_if_sco_can_send_now(void); 97 static void hci_run(void); 98 static int hci_is_le_connection(hci_connection_t * connection); 99 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 100 static int hci_local_ssp_activated(void); 101 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 102 103 #ifdef ENABLE_BLE 104 // called from test/ble_client/advertising_data_parser.c 105 void le_handle_advertisement_report(uint8_t *packet, int size); 106 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 107 #endif 108 109 // the STACK is here 110 #ifndef HAVE_MALLOC 111 static hci_stack_t hci_stack_static; 112 #endif 113 static hci_stack_t * hci_stack = NULL; 114 115 // test helper 116 static uint8_t disable_l2cap_timeouts = 0; 117 118 /** 119 * create connection for given address 120 * 121 * @return connection OR NULL, if no memory left 122 */ 123 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 124 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 125 hci_connection_t * conn = btstack_memory_hci_connection_get(); 126 if (!conn) return NULL; 127 memset(conn, 0, sizeof(hci_connection_t)); 128 bd_addr_copy(conn->address, addr); 129 conn->address_type = addr_type; 130 conn->con_handle = 0xffff; 131 conn->authentication_flags = AUTH_FLAGS_NONE; 132 conn->bonding_flags = 0; 133 conn->requested_security_level = LEVEL_0; 134 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 135 btstack_run_loop_set_timer_context(&conn->timeout, conn); 136 hci_connection_timestamp(conn); 137 conn->acl_recombination_length = 0; 138 conn->acl_recombination_pos = 0; 139 conn->num_acl_packets_sent = 0; 140 conn->num_sco_packets_sent = 0; 141 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 142 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 143 return conn; 144 } 145 146 147 /** 148 * get le connection parameter range 149 * 150 * @return le connection parameter range struct 151 */ 152 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 153 *range = hci_stack->le_connection_parameter_range; 154 } 155 156 /** 157 * set le connection parameter range 158 * 159 */ 160 161 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 162 hci_stack->le_connection_parameter_range = *range; 163 } 164 165 /** 166 * get hci connections iterator 167 * 168 * @return hci connections iterator 169 */ 170 171 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 172 btstack_linked_list_iterator_init(it, &hci_stack->connections); 173 } 174 175 /** 176 * get connection for a given handle 177 * 178 * @return connection OR NULL, if not found 179 */ 180 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 181 btstack_linked_list_iterator_t it; 182 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 183 while (btstack_linked_list_iterator_has_next(&it)){ 184 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 185 if ( item->con_handle == con_handle ) { 186 return item; 187 } 188 } 189 return NULL; 190 } 191 192 /** 193 * get connection for given address 194 * 195 * @return connection OR NULL, if not found 196 */ 197 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 198 btstack_linked_list_iterator_t it; 199 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 200 while (btstack_linked_list_iterator_has_next(&it)){ 201 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 202 if (connection->address_type != addr_type) continue; 203 if (memcmp(addr, connection->address, 6) != 0) continue; 204 return connection; 205 } 206 return NULL; 207 } 208 209 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 210 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 211 #ifdef HAVE_EMBEDDED_TICK 212 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 213 // connections might be timed out 214 hci_emit_l2cap_check_timeout(connection); 215 } 216 #else 217 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 218 // connections might be timed out 219 hci_emit_l2cap_check_timeout(connection); 220 } 221 #endif 222 } 223 224 static void hci_connection_timestamp(hci_connection_t *connection){ 225 #ifdef HAVE_EMBEDDED_TICK 226 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 227 #else 228 connection->timestamp = btstack_run_loop_get_time_ms(); 229 #endif 230 } 231 232 233 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 234 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 235 } 236 237 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 238 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 239 } 240 241 242 /** 243 * add authentication flags and reset timer 244 * @note: assumes classic connection 245 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 246 */ 247 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 248 bd_addr_t addr; 249 reverse_bd_addr(bd_addr, addr); 250 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 251 if (conn) { 252 connectionSetAuthenticationFlags(conn, flags); 253 hci_connection_timestamp(conn); 254 } 255 } 256 257 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 258 hci_connection_t * conn = hci_connection_for_handle(handle); 259 if (!conn) return 0; 260 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 261 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 262 return 0; 263 } 264 265 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 266 if (!hci_stack->link_key_db) return; 267 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 268 hci_stack->link_key_db->delete_link_key(addr); 269 } 270 271 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 272 if (!hci_stack->link_key_db) return; 273 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 274 hci_stack->link_key_db->put_link_key(addr, link_key, type); 275 } 276 277 static int hci_is_le_connection(hci_connection_t * connection){ 278 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 279 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 280 } 281 282 /** 283 * count connections 284 */ 285 static int nr_hci_connections(void){ 286 int count = 0; 287 btstack_linked_item_t *it; 288 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 289 return count; 290 } 291 292 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 293 294 int num_packets_sent_classic = 0; 295 int num_packets_sent_le = 0; 296 297 btstack_linked_item_t *it; 298 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 299 hci_connection_t * connection = (hci_connection_t *) it; 300 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 301 num_packets_sent_classic += connection->num_acl_packets_sent; 302 } else { 303 num_packets_sent_le += connection->num_acl_packets_sent; 304 } 305 } 306 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 307 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 308 int free_slots_le = 0; 309 310 if (free_slots_classic < 0){ 311 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 312 return 0; 313 } 314 315 if (hci_stack->le_acl_packets_total_num){ 316 // if we have LE slots, they are used 317 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 318 if (free_slots_le < 0){ 319 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 320 return 0; 321 } 322 } else { 323 // otherwise, classic slots are used for LE, too 324 free_slots_classic -= num_packets_sent_le; 325 if (free_slots_classic < 0){ 326 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 327 return 0; 328 } 329 } 330 331 switch (address_type){ 332 case BD_ADDR_TYPE_UNKNOWN: 333 log_error("hci_number_free_acl_slots: unknown address type"); 334 return 0; 335 336 case BD_ADDR_TYPE_CLASSIC: 337 return free_slots_classic; 338 339 default: 340 if (hci_stack->le_acl_packets_total_num){ 341 return free_slots_le; 342 } 343 return free_slots_classic; 344 } 345 } 346 347 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 348 // get connection type 349 hci_connection_t * connection = hci_connection_for_handle(con_handle); 350 if (!connection){ 351 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 352 return 0; 353 } 354 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 355 } 356 357 static int hci_number_free_sco_slots(void){ 358 int num_sco_packets_sent = 0; 359 btstack_linked_item_t *it; 360 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 361 hci_connection_t * connection = (hci_connection_t *) it; 362 num_sco_packets_sent += connection->num_sco_packets_sent; 363 } 364 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 365 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 366 return 0; 367 } 368 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 369 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 370 } 371 372 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 373 int hci_can_send_command_packet_now(void){ 374 if (hci_stack->hci_packet_buffer_reserved) return 0; 375 376 // check for async hci transport implementations 377 if (hci_stack->hci_transport->can_send_packet_now){ 378 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 379 return 0; 380 } 381 } 382 383 return hci_stack->num_cmd_packets > 0; 384 } 385 386 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 387 // check for async hci transport implementations 388 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 389 return hci_stack->hci_transport->can_send_packet_now(packet_type); 390 } 391 392 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 393 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 394 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 395 } 396 397 int hci_can_send_acl_classic_packet_now(void){ 398 if (hci_stack->hci_packet_buffer_reserved) return 0; 399 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 400 } 401 402 int hci_can_send_acl_le_packet_now(void){ 403 if (hci_stack->hci_packet_buffer_reserved) return 0; 404 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 405 } 406 407 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 408 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 409 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 410 } 411 412 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 413 if (hci_stack->hci_packet_buffer_reserved) return 0; 414 return hci_can_send_prepared_acl_packet_now(con_handle); 415 } 416 417 int hci_can_send_prepared_sco_packet_now(void){ 418 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 419 if (!hci_stack->synchronous_flow_control_enabled) return 1; 420 return hci_number_free_sco_slots() > 0; 421 } 422 423 int hci_can_send_sco_packet_now(void){ 424 if (hci_stack->hci_packet_buffer_reserved) return 0; 425 return hci_can_send_prepared_sco_packet_now(); 426 } 427 428 void hci_request_sco_can_send_now_event(void){ 429 hci_stack->sco_waiting_for_can_send_now = 1; 430 hci_notify_if_sco_can_send_now(); 431 } 432 433 // used for internal checks in l2cap.c 434 int hci_is_packet_buffer_reserved(void){ 435 return hci_stack->hci_packet_buffer_reserved; 436 } 437 438 // reserves outgoing packet buffer. @returns 1 if successful 439 int hci_reserve_packet_buffer(void){ 440 if (hci_stack->hci_packet_buffer_reserved) { 441 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 442 return 0; 443 } 444 hci_stack->hci_packet_buffer_reserved = 1; 445 return 1; 446 } 447 448 void hci_release_packet_buffer(void){ 449 hci_stack->hci_packet_buffer_reserved = 0; 450 } 451 452 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 453 static int hci_transport_synchronous(void){ 454 return hci_stack->hci_transport->can_send_packet_now == NULL; 455 } 456 457 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 458 459 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 460 461 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 462 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 463 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 464 max_acl_data_packet_length = hci_stack->le_data_packets_length; 465 } 466 467 // testing: reduce buffer to minimum 468 // max_acl_data_packet_length = 52; 469 470 log_debug("hci_send_acl_packet_fragments entered"); 471 472 int err; 473 // multiple packets could be send on a synchronous HCI transport 474 while (1){ 475 476 log_debug("hci_send_acl_packet_fragments loop entered"); 477 478 // get current data 479 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 480 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 481 int more_fragments = 0; 482 483 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 484 if (current_acl_data_packet_length > max_acl_data_packet_length){ 485 more_fragments = 1; 486 current_acl_data_packet_length = max_acl_data_packet_length; 487 } 488 489 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 490 if (acl_header_pos > 0){ 491 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 492 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 493 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 494 } 495 496 // update header len 497 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 498 499 // count packet 500 connection->num_acl_packets_sent++; 501 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %u)", more_fragments); 502 503 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 504 if (more_fragments){ 505 // update start of next fragment to send 506 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 507 } else { 508 // done 509 hci_stack->acl_fragmentation_pos = 0; 510 hci_stack->acl_fragmentation_total_size = 0; 511 } 512 513 // send packet 514 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 515 const int size = current_acl_data_packet_length + 4; 516 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 517 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 518 519 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %u)", more_fragments); 520 521 // done yet? 522 if (!more_fragments) break; 523 524 // can send more? 525 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 526 } 527 528 log_debug("hci_send_acl_packet_fragments loop over"); 529 530 // release buffer now for synchronous transport 531 if (hci_transport_synchronous()){ 532 hci_release_packet_buffer(); 533 // notify upper stack that it might be possible to send again 534 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 535 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 536 } 537 538 return err; 539 } 540 541 // pre: caller has reserved the packet buffer 542 int hci_send_acl_packet_buffer(int size){ 543 544 // log_info("hci_send_acl_packet_buffer size %u", size); 545 546 if (!hci_stack->hci_packet_buffer_reserved) { 547 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 548 return 0; 549 } 550 551 uint8_t * packet = hci_stack->hci_packet_buffer; 552 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 553 554 // check for free places on Bluetooth module 555 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 556 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 557 hci_release_packet_buffer(); 558 return BTSTACK_ACL_BUFFERS_FULL; 559 } 560 561 hci_connection_t *connection = hci_connection_for_handle( con_handle); 562 if (!connection) { 563 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 564 hci_release_packet_buffer(); 565 return 0; 566 } 567 hci_connection_timestamp(connection); 568 569 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 570 571 // setup data 572 hci_stack->acl_fragmentation_total_size = size; 573 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 574 575 return hci_send_acl_packet_fragments(connection); 576 } 577 578 // pre: caller has reserved the packet buffer 579 int hci_send_sco_packet_buffer(int size){ 580 581 // log_info("hci_send_acl_packet_buffer size %u", size); 582 583 if (!hci_stack->hci_packet_buffer_reserved) { 584 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 585 return 0; 586 } 587 588 uint8_t * packet = hci_stack->hci_packet_buffer; 589 590 // skip checks in loopback mode 591 if (!hci_stack->loopback_mode){ 592 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 593 594 // check for free places on Bluetooth module 595 if (!hci_can_send_prepared_sco_packet_now()) { 596 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 597 hci_release_packet_buffer(); 598 return BTSTACK_ACL_BUFFERS_FULL; 599 } 600 601 // track send packet in connection struct 602 hci_connection_t *connection = hci_connection_for_handle( con_handle); 603 if (!connection) { 604 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 605 hci_release_packet_buffer(); 606 return 0; 607 } 608 connection->num_sco_packets_sent++; 609 } 610 611 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 612 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 613 614 if (hci_transport_synchronous()){ 615 hci_release_packet_buffer(); 616 // notify upper stack that it might be possible to send again 617 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 618 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 619 } 620 621 return err; 622 } 623 624 static void acl_handler(uint8_t *packet, int size){ 625 626 // log_info("acl_handler: size %u", size); 627 628 // get info 629 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 630 hci_connection_t *conn = hci_connection_for_handle(con_handle); 631 uint8_t acl_flags = READ_ACL_FLAGS(packet); 632 uint16_t acl_length = READ_ACL_LENGTH(packet); 633 634 // ignore non-registered handle 635 if (!conn){ 636 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 637 return; 638 } 639 640 // assert packet is complete 641 if (acl_length + 4 != size){ 642 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 643 return; 644 } 645 646 // update idle timestamp 647 hci_connection_timestamp(conn); 648 649 // handle different packet types 650 switch (acl_flags & 0x03) { 651 652 case 0x01: // continuation fragment 653 654 // sanity checks 655 if (conn->acl_recombination_pos == 0) { 656 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 657 return; 658 } 659 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 660 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 661 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 662 conn->acl_recombination_pos = 0; 663 return; 664 } 665 666 // append fragment payload (header already stored) 667 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 668 conn->acl_recombination_pos += acl_length; 669 670 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 671 // conn->acl_recombination_pos, conn->acl_recombination_length); 672 673 // forward complete L2CAP packet if complete. 674 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 675 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 676 // reset recombination buffer 677 conn->acl_recombination_length = 0; 678 conn->acl_recombination_pos = 0; 679 } 680 break; 681 682 case 0x02: { // first fragment 683 684 // sanity check 685 if (conn->acl_recombination_pos) { 686 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 687 conn->acl_recombination_pos = 0; 688 } 689 690 // peek into L2CAP packet! 691 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 692 693 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 694 695 // compare fragment size to L2CAP packet size 696 if (acl_length >= l2cap_length + 4){ 697 // forward fragment as L2CAP packet 698 hci_emit_acl_packet(packet, acl_length + 4); 699 } else { 700 701 if (acl_length > HCI_ACL_BUFFER_SIZE){ 702 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 703 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 704 return; 705 } 706 707 // store first fragment and tweak acl length for complete package 708 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 709 conn->acl_recombination_pos = acl_length + 4; 710 conn->acl_recombination_length = l2cap_length; 711 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 712 } 713 break; 714 715 } 716 default: 717 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 718 return; 719 } 720 721 // execute main loop 722 hci_run(); 723 } 724 725 static void hci_shutdown_connection(hci_connection_t *conn){ 726 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 727 728 btstack_run_loop_remove_timer(&conn->timeout); 729 730 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 731 btstack_memory_hci_connection_free( conn ); 732 733 // now it's gone 734 hci_emit_nr_connections_changed(); 735 } 736 737 static const uint16_t packet_type_sizes[] = { 738 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 739 HCI_ACL_DH1_SIZE, 0, 0, 0, 740 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 741 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 742 }; 743 static const uint8_t packet_type_feature_requirement_bit[] = { 744 0, // 3 slot packets 745 1, // 5 slot packets 746 25, // EDR 2 mpbs 747 26, // EDR 3 mbps 748 39, // 3 slot EDR packts 749 40, // 5 slot EDR packet 750 }; 751 static const uint16_t packet_type_feature_packet_mask[] = { 752 0x0f00, // 3 slot packets 753 0xf000, // 5 slot packets 754 0x1102, // EDR 2 mpbs 755 0x2204, // EDR 3 mbps 756 0x0300, // 3 slot EDR packts 757 0x3000, // 5 slot EDR packet 758 }; 759 760 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 761 // enable packet types based on size 762 uint16_t packet_types = 0; 763 unsigned int i; 764 for (i=0;i<16;i++){ 765 if (packet_type_sizes[i] == 0) continue; 766 if (packet_type_sizes[i] <= buffer_size){ 767 packet_types |= 1 << i; 768 } 769 } 770 // disable packet types due to missing local supported features 771 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 772 int bit_idx = packet_type_feature_requirement_bit[i]; 773 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 774 if (feature_set) continue; 775 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 776 packet_types &= ~packet_type_feature_packet_mask[i]; 777 } 778 // flip bits for "may not be used" 779 packet_types ^= 0x3306; 780 return packet_types; 781 } 782 783 uint16_t hci_usable_acl_packet_types(void){ 784 return hci_stack->packet_types; 785 } 786 787 uint8_t* hci_get_outgoing_packet_buffer(void){ 788 // hci packet buffer is >= acl data packet length 789 return hci_stack->hci_packet_buffer; 790 } 791 792 uint16_t hci_max_acl_data_packet_length(void){ 793 return hci_stack->acl_data_packet_length; 794 } 795 796 int hci_extended_sco_link_supported(void){ 797 // No. 31, byte 3, bit 7 798 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 799 } 800 801 int hci_non_flushable_packet_boundary_flag_supported(void){ 802 // No. 54, byte 6, bit 6 803 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 804 } 805 806 static int gap_ssp_supported(void){ 807 // No. 51, byte 6, bit 3 808 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 809 } 810 811 static int hci_classic_supported(void){ 812 // No. 37, byte 4, bit 5, = No BR/EDR Support 813 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 814 } 815 816 static int hci_le_supported(void){ 817 #ifdef ENABLE_BLE 818 // No. 37, byte 4, bit 6 = LE Supported (Controller) 819 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 820 #else 821 return 0; 822 #endif 823 } 824 825 // get addr type and address used in advertisement packets 826 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 827 *addr_type = hci_stack->adv_addr_type; 828 if (hci_stack->adv_addr_type){ 829 memcpy(addr, hci_stack->adv_address, 6); 830 } else { 831 memcpy(addr, hci_stack->local_bd_addr, 6); 832 } 833 } 834 835 #ifdef ENABLE_BLE 836 void le_handle_advertisement_report(uint8_t *packet, int size){ 837 int offset = 3; 838 int num_reports = packet[offset]; 839 offset += 1; 840 841 int i; 842 // log_info("HCI: handle adv report with num reports: %d", num_reports); 843 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 844 for (i=0; i<num_reports;i++){ 845 uint8_t data_length = packet[offset + 8]; 846 uint8_t event_size = 10 + data_length; 847 int pos = 0; 848 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 849 event[pos++] = event_size; 850 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 851 offset += 8; 852 pos += 8; 853 event[pos++] = packet[offset + 1 + data_length]; // rssi 854 event[pos++] = packet[offset++]; //data_length; 855 memcpy(&event[pos], &packet[offset], data_length); 856 pos += data_length; 857 offset += data_length + 1; // rssi 858 hci_emit_event(event, pos, 1); 859 } 860 } 861 #endif 862 863 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 864 if (!hci_stack->config) return 0; 865 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 866 // Limit baud rate for Broadcom chipsets to 3 mbps 867 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 868 baud_rate = 3000000; 869 } 870 return baud_rate; 871 } 872 873 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 874 switch (hci_stack->substate){ 875 case HCI_INIT_W4_SEND_RESET: 876 log_info("Resend HCI Reset"); 877 hci_stack->substate = HCI_INIT_SEND_RESET; 878 hci_stack->num_cmd_packets = 1; 879 hci_run(); 880 break; 881 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 882 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 883 if (hci_stack->hci_transport->reset_link){ 884 hci_stack->hci_transport->reset_link(); 885 } 886 // NOTE: explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 887 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 888 log_info("Resend HCI Reset - CSR Warm Boot"); 889 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 890 hci_stack->num_cmd_packets = 1; 891 hci_run(); 892 break; 893 case HCI_INIT_W4_SEND_BAUD_CHANGE: 894 if (hci_stack->hci_transport->set_baudrate){ 895 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 896 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 897 hci_stack->hci_transport->set_baudrate(baud_rate); 898 } 899 // For CSR, HCI Reset is sent on new baud rate 900 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 901 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 902 hci_run(); 903 } 904 break; 905 default: 906 break; 907 } 908 } 909 910 static void hci_initializing_next_state(void){ 911 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 912 } 913 914 // assumption: hci_can_send_command_packet_now() == true 915 static void hci_initializing_run(void){ 916 log_info("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 917 switch (hci_stack->substate){ 918 case HCI_INIT_SEND_RESET: 919 hci_state_reset(); 920 921 #ifndef HAVE_PLATFORM_IPHONE_OS 922 // prepare reset if command complete not received in 100ms 923 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 924 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 925 btstack_run_loop_add_timer(&hci_stack->timeout); 926 #endif 927 // send command 928 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 929 hci_send_cmd(&hci_reset); 930 break; 931 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 932 hci_send_cmd(&hci_read_local_version_information); 933 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 934 break; 935 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 936 hci_state_reset(); 937 // prepare reset if command complete not received in 100ms 938 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 939 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 940 btstack_run_loop_add_timer(&hci_stack->timeout); 941 // send command 942 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 943 hci_send_cmd(&hci_reset); 944 break; 945 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 946 hci_state_reset(); 947 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 948 hci_send_cmd(&hci_reset); 949 break; 950 case HCI_INIT_SEND_BAUD_CHANGE: { 951 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 952 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 953 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 954 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 955 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 956 // STLC25000D: baudrate change happens within 0.5 s after command was send, 957 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 958 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 959 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 960 btstack_run_loop_add_timer(&hci_stack->timeout); 961 } 962 break; 963 } 964 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 965 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 966 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 967 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 968 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 969 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 970 break; 971 } 972 case HCI_INIT_CUSTOM_INIT: 973 log_info("Custom init"); 974 // Custom initialization 975 if (hci_stack->chipset && hci_stack->chipset->next_command){ 976 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 977 if (valid_cmd){ 978 int size = 3 + hci_stack->hci_packet_buffer[2]; 979 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 980 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 981 switch (valid_cmd) { 982 case 1: 983 default: 984 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 985 break; 986 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 987 log_info("CSR Warm Boot"); 988 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 989 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 990 btstack_run_loop_add_timer(&hci_stack->timeout); 991 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 992 && hci_stack->config 993 && hci_stack->chipset 994 // && hci_stack->chipset->set_baudrate_command -- there's no such command 995 && hci_stack->hci_transport->set_baudrate 996 && hci_transport_uart_get_main_baud_rate()){ 997 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 998 } else { 999 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1000 } 1001 break; 1002 } 1003 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1004 break; 1005 } 1006 log_info("hci_run: init script done"); 1007 1008 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1009 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1010 int need_baud_change = hci_stack->config 1011 && hci_stack->chipset 1012 && hci_stack->chipset->set_baudrate_command 1013 && hci_stack->hci_transport->set_baudrate 1014 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1015 if (need_baud_change) { 1016 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1017 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1018 hci_stack->hci_transport->set_baudrate(baud_rate); 1019 } 1020 } 1021 } 1022 // otherwise continue 1023 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1024 hci_send_cmd(&hci_read_local_supported_commands); 1025 break; 1026 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1027 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1028 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1029 hci_send_cmd(&hci_read_local_supported_commands); 1030 break; 1031 case HCI_INIT_SET_BD_ADDR: 1032 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1033 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1034 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1035 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1036 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1037 break; 1038 case HCI_INIT_READ_BD_ADDR: 1039 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1040 hci_send_cmd(&hci_read_bd_addr); 1041 break; 1042 case HCI_INIT_READ_BUFFER_SIZE: 1043 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1044 hci_send_cmd(&hci_read_buffer_size); 1045 break; 1046 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1047 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1048 hci_send_cmd(&hci_read_local_supported_features); 1049 break; 1050 case HCI_INIT_SET_EVENT_MASK: 1051 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1052 if (hci_le_supported()){ 1053 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1054 } else { 1055 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1056 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1057 } 1058 break; 1059 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1060 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1061 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1062 break; 1063 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1064 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1065 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1066 break; 1067 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1068 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1069 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1070 break; 1071 case HCI_INIT_WRITE_LOCAL_NAME: 1072 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1073 if (hci_stack->local_name){ 1074 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1075 } else { 1076 char local_name[8+17+1]; 1077 // BTstack 11:22:33:44:55:66 1078 memcpy(local_name, "BTstack ", 8); 1079 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1080 local_name[8+17] = '\0'; 1081 log_info("---> Name %s", local_name); 1082 hci_send_cmd(&hci_write_local_name, local_name); 1083 } 1084 break; 1085 case HCI_INIT_WRITE_EIR_DATA: 1086 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1087 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1088 break; 1089 case HCI_INIT_WRITE_INQUIRY_MODE: 1090 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1091 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1092 break; 1093 case HCI_INIT_WRITE_SCAN_ENABLE: 1094 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1095 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1096 break; 1097 // only sent if ENABLE_SCO_OVER_HCI is defined 1098 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1099 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1100 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1101 break; 1102 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1103 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1104 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1105 break; 1106 #ifdef ENABLE_BLE 1107 // LE INIT 1108 case HCI_INIT_LE_READ_BUFFER_SIZE: 1109 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1110 hci_send_cmd(&hci_le_read_buffer_size); 1111 break; 1112 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1113 // LE Supported Host = 1, Simultaneous Host = 0 1114 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1115 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1116 break; 1117 case HCI_INIT_READ_WHITE_LIST_SIZE: 1118 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1119 hci_send_cmd(&hci_le_read_white_list_size); 1120 break; 1121 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1122 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1123 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1124 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1125 break; 1126 #endif 1127 default: 1128 return; 1129 } 1130 } 1131 1132 static void hci_init_done(void){ 1133 // done. tell the app 1134 log_info("hci_init_done -> HCI_STATE_WORKING"); 1135 hci_stack->state = HCI_STATE_WORKING; 1136 hci_emit_state(); 1137 hci_run(); 1138 } 1139 1140 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1141 uint8_t command_completed = 0; 1142 1143 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1144 uint16_t opcode = little_endian_read_16(packet,3); 1145 if (opcode == hci_stack->last_cmd_opcode){ 1146 command_completed = 1; 1147 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1148 } else { 1149 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1150 } 1151 } 1152 1153 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1154 uint8_t status = packet[2]; 1155 uint16_t opcode = little_endian_read_16(packet,4); 1156 if (opcode == hci_stack->last_cmd_opcode){ 1157 if (status){ 1158 command_completed = 1; 1159 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1160 } else { 1161 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1162 } 1163 } else { 1164 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1165 } 1166 } 1167 1168 // Vendor == CSR 1169 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1170 // TODO: track actual command 1171 command_completed = 1; 1172 } 1173 1174 // Vendor == Toshiba 1175 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1176 // TODO: track actual command 1177 command_completed = 1; 1178 } 1179 1180 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1181 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1182 // 1183 // HCI Reset 1184 // Timeout 100 ms 1185 // HCI Reset 1186 // Command Complete Reset 1187 // HCI Read Local Version Information 1188 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1189 // hang... 1190 // 1191 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1192 if (!command_completed 1193 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1194 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1195 1196 uint16_t opcode = little_endian_read_16(packet,3); 1197 if (opcode == hci_reset.opcode){ 1198 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1199 return; 1200 } 1201 } 1202 1203 // CSR & H5 1204 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1205 if (!command_completed 1206 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1207 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1208 1209 uint16_t opcode = little_endian_read_16(packet,3); 1210 if (opcode == hci_reset.opcode){ 1211 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1212 return; 1213 } 1214 } 1215 1216 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1217 // fix: Correct substate and behave as command below 1218 if (command_completed){ 1219 switch (hci_stack->substate){ 1220 case HCI_INIT_SEND_RESET: 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 break; 1223 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1224 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1225 break; 1226 default: 1227 break; 1228 } 1229 } 1230 1231 1232 if (!command_completed) return; 1233 1234 int need_baud_change = hci_stack->config 1235 && hci_stack->chipset 1236 && hci_stack->chipset->set_baudrate_command 1237 && hci_stack->hci_transport->set_baudrate 1238 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1239 1240 int need_addr_change = hci_stack->custom_bd_addr_set 1241 && hci_stack->chipset 1242 && hci_stack->chipset->set_bd_addr_command; 1243 1244 switch(hci_stack->substate){ 1245 case HCI_INIT_SEND_RESET: 1246 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1247 // fix: just correct substate and behave as command below 1248 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1249 btstack_run_loop_remove_timer(&hci_stack->timeout); 1250 break; 1251 case HCI_INIT_W4_SEND_RESET: 1252 btstack_run_loop_remove_timer(&hci_stack->timeout); 1253 break; 1254 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1255 log_info("Received local version info, need baud change %u", need_baud_change); 1256 if (need_baud_change){ 1257 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1258 return; 1259 } 1260 // skip baud change 1261 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1262 return; 1263 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1264 // for STLC2500D, baud rate change already happened. 1265 // for others, baud rate gets changed now 1266 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1267 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1268 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1269 hci_stack->hci_transport->set_baudrate(baud_rate); 1270 } 1271 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1272 return; 1273 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1274 btstack_run_loop_remove_timer(&hci_stack->timeout); 1275 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1276 return; 1277 case HCI_INIT_W4_CUSTOM_INIT: 1278 // repeat custom init 1279 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1280 return; 1281 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1282 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1283 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1284 return; 1285 } 1286 if (need_addr_change){ 1287 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1288 return; 1289 } 1290 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1291 return; 1292 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1293 if (need_baud_change){ 1294 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1295 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1296 hci_stack->hci_transport->set_baudrate(baud_rate); 1297 } 1298 if (need_addr_change){ 1299 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1300 return; 1301 } 1302 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1303 return; 1304 case HCI_INIT_W4_SET_BD_ADDR: 1305 // for STLC2500D, bd addr change only gets active after sending reset command 1306 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1307 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1308 return; 1309 } 1310 // skipping st warm boot 1311 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1312 return; 1313 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1314 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1315 return; 1316 case HCI_INIT_W4_READ_BD_ADDR: 1317 // only read buffer size if supported 1318 if (hci_stack->local_supported_commands[0] & 0x01) { 1319 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1320 return; 1321 } 1322 // skipping read buffer size 1323 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1324 return; 1325 case HCI_INIT_W4_SET_EVENT_MASK: 1326 // skip Classic init commands for LE only chipsets 1327 if (!hci_classic_supported()){ 1328 if (hci_le_supported()){ 1329 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1330 return; 1331 } else { 1332 log_error("Neither BR/EDR nor LE supported"); 1333 hci_init_done(); 1334 return; 1335 } 1336 } 1337 if (!gap_ssp_supported()){ 1338 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1339 return; 1340 } 1341 break; 1342 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1343 break; 1344 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1345 // skip write le host if not supported (e.g. on LE only EM9301) 1346 if (hci_stack->local_supported_commands[0] & 0x02) break; 1347 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1348 return; 1349 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1350 // skip write eir data if no eir data set 1351 if (hci_stack->eir_data) break; 1352 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1353 return; 1354 1355 #ifdef ENABLE_SCO_OVER_HCI 1356 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1357 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1358 break; 1359 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1360 if (!hci_le_supported()){ 1361 // SKIP LE init for Classic only configuration 1362 hci_init_done(); 1363 return; 1364 } 1365 break; 1366 #else 1367 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1368 if (!hci_le_supported()){ 1369 // SKIP LE init for Classic only configuration 1370 hci_init_done(); 1371 return; 1372 } 1373 #endif 1374 break; 1375 // Response to command before init done state -> init done 1376 case (HCI_INIT_DONE-1): 1377 hci_init_done(); 1378 return; 1379 1380 default: 1381 break; 1382 } 1383 hci_initializing_next_state(); 1384 } 1385 1386 static void event_handler(uint8_t *packet, int size){ 1387 1388 uint16_t event_length = packet[1]; 1389 1390 // assert packet is complete 1391 if (size != event_length + 2){ 1392 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1393 return; 1394 } 1395 1396 bd_addr_t addr; 1397 bd_addr_type_t addr_type; 1398 uint8_t link_type; 1399 hci_con_handle_t handle; 1400 hci_connection_t * conn; 1401 int i; 1402 1403 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1404 1405 switch (hci_event_packet_get_type(packet)) { 1406 1407 case HCI_EVENT_COMMAND_COMPLETE: 1408 // get num cmd packets 1409 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1410 hci_stack->num_cmd_packets = packet[2]; 1411 1412 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1413 // from offset 5 1414 // status 1415 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1416 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1417 hci_stack->sco_data_packet_length = packet[8]; 1418 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1419 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1420 1421 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1422 // determine usable ACL payload size 1423 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1424 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1425 } 1426 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1427 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1428 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1429 } 1430 } 1431 #ifdef ENABLE_BLE 1432 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1433 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1434 hci_stack->le_acl_packets_total_num = packet[8]; 1435 // determine usable ACL payload size 1436 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1437 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1438 } 1439 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1440 } 1441 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1442 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1443 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1444 } 1445 #endif 1446 // Dump local address 1447 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1448 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1449 hci_stack->local_bd_addr); 1450 log_info("Local Address, Status: 0x%02x: Addr: %s", 1451 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1452 if (hci_stack->link_key_db){ 1453 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1454 } 1455 } 1456 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1457 hci_emit_discoverable_enabled(hci_stack->discoverable); 1458 } 1459 // Note: HCI init checks 1460 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1461 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1462 1463 // determine usable ACL packet types based on host buffer size and supported features 1464 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1465 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1466 1467 // Classic/LE 1468 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1469 } 1470 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1471 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1472 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1473 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1474 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1475 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1476 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1477 // notify app 1478 if (hci_stack->local_version_information_callback){ 1479 hci_stack->local_version_information_callback(packet); 1480 } 1481 } 1482 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1483 hci_stack->local_supported_commands[0] = 1484 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1485 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1486 } 1487 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1488 if (packet[5] == 0){ 1489 hci_stack->synchronous_flow_control_enabled = 1; 1490 } 1491 } 1492 break; 1493 1494 case HCI_EVENT_COMMAND_STATUS: 1495 // get num cmd packets 1496 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1497 hci_stack->num_cmd_packets = packet[3]; 1498 break; 1499 1500 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1501 int offset = 3; 1502 for (i=0; i<packet[2];i++){ 1503 handle = little_endian_read_16(packet, offset); 1504 offset += 2; 1505 uint16_t num_packets = little_endian_read_16(packet, offset); 1506 offset += 2; 1507 1508 conn = hci_connection_for_handle(handle); 1509 if (!conn){ 1510 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1511 continue; 1512 } 1513 1514 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1515 if (conn->num_sco_packets_sent >= num_packets){ 1516 conn->num_sco_packets_sent -= num_packets; 1517 } else { 1518 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1519 conn->num_sco_packets_sent = 0; 1520 } 1521 hci_notify_if_sco_can_send_now(); 1522 } else { 1523 if (conn->num_acl_packets_sent >= num_packets){ 1524 conn->num_acl_packets_sent -= num_packets; 1525 } else { 1526 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1527 conn->num_acl_packets_sent = 0; 1528 } 1529 } 1530 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1531 } 1532 break; 1533 } 1534 case HCI_EVENT_CONNECTION_REQUEST: 1535 reverse_bd_addr(&packet[2], addr); 1536 // TODO: eval COD 8-10 1537 link_type = packet[11]; 1538 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1539 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1540 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1541 if (!conn) { 1542 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1543 } 1544 if (!conn) { 1545 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1546 hci_stack->decline_reason = 0x0d; 1547 bd_addr_copy(hci_stack->decline_addr, addr); 1548 break; 1549 } 1550 conn->role = HCI_ROLE_SLAVE; 1551 conn->state = RECEIVED_CONNECTION_REQUEST; 1552 // store info about eSCO 1553 if (link_type == 0x02){ 1554 conn->remote_supported_feature_eSCO = 1; 1555 } 1556 hci_run(); 1557 break; 1558 1559 case HCI_EVENT_CONNECTION_COMPLETE: 1560 // Connection management 1561 reverse_bd_addr(&packet[5], addr); 1562 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1563 addr_type = BD_ADDR_TYPE_CLASSIC; 1564 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1565 if (conn) { 1566 if (!packet[2]){ 1567 conn->state = OPEN; 1568 conn->con_handle = little_endian_read_16(packet, 3); 1569 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1570 1571 // restart timer 1572 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1573 btstack_run_loop_add_timer(&conn->timeout); 1574 1575 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1576 1577 hci_emit_nr_connections_changed(); 1578 } else { 1579 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1580 uint8_t status = packet[2]; 1581 bd_addr_t bd_address; 1582 memcpy(&bd_address, conn->address, 6); 1583 1584 // connection failed, remove entry 1585 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1586 btstack_memory_hci_connection_free( conn ); 1587 1588 // notify client if dedicated bonding 1589 if (notify_dedicated_bonding_failed){ 1590 log_info("hci notify_dedicated_bonding_failed"); 1591 hci_emit_dedicated_bonding_result(bd_address, status); 1592 } 1593 1594 // if authentication error, also delete link key 1595 if (packet[2] == 0x05) { 1596 gap_drop_link_key_for_bd_addr(addr); 1597 } 1598 } 1599 } 1600 break; 1601 1602 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1603 reverse_bd_addr(&packet[5], addr); 1604 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1605 if (packet[2]){ 1606 // connection failed 1607 break; 1608 } 1609 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1610 if (!conn) { 1611 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1612 } 1613 if (!conn) { 1614 break; 1615 } 1616 conn->state = OPEN; 1617 conn->con_handle = little_endian_read_16(packet, 3); 1618 break; 1619 1620 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1621 handle = little_endian_read_16(packet, 3); 1622 conn = hci_connection_for_handle(handle); 1623 if (!conn) break; 1624 if (!packet[2]){ 1625 uint8_t * features = &packet[5]; 1626 if (features[6] & (1 << 3)){ 1627 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1628 } 1629 if (features[3] & (1<<7)){ 1630 conn->remote_supported_feature_eSCO = 1; 1631 } 1632 } 1633 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1634 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1635 if (conn->bonding_flags & BONDING_DEDICATED){ 1636 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1637 } 1638 break; 1639 1640 case HCI_EVENT_LINK_KEY_REQUEST: 1641 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1643 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1644 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1645 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1646 hci_run(); 1647 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1648 return; 1649 1650 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1651 reverse_bd_addr(&packet[2], addr); 1652 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1653 if (!conn) break; 1654 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1655 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1656 // Change Connection Encryption keeps link key type 1657 if (link_key_type != CHANGED_COMBINATION_KEY){ 1658 conn->link_key_type = link_key_type; 1659 } 1660 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1661 // still forward event to allow dismiss of pairing dialog 1662 break; 1663 } 1664 1665 case HCI_EVENT_PIN_CODE_REQUEST: 1666 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1667 // non-bondable mode: pin code negative reply will be sent 1668 if (!hci_stack->bondable){ 1669 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1670 hci_run(); 1671 return; 1672 } 1673 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1674 if (!hci_stack->link_key_db) break; 1675 hci_event_pin_code_request_get_bd_addr(packet, addr); 1676 hci_stack->link_key_db->delete_link_key(addr); 1677 break; 1678 1679 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1680 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1681 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1682 break; 1683 1684 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1685 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1686 if (!hci_stack->ssp_auto_accept) break; 1687 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1688 break; 1689 1690 case HCI_EVENT_USER_PASSKEY_REQUEST: 1691 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1692 if (!hci_stack->ssp_auto_accept) break; 1693 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1694 break; 1695 1696 case HCI_EVENT_ENCRYPTION_CHANGE: 1697 handle = little_endian_read_16(packet, 3); 1698 conn = hci_connection_for_handle(handle); 1699 if (!conn) break; 1700 if (packet[2] == 0) { 1701 if (packet[5]){ 1702 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1703 } else { 1704 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1705 } 1706 } 1707 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1708 break; 1709 1710 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1711 handle = little_endian_read_16(packet, 3); 1712 conn = hci_connection_for_handle(handle); 1713 if (!conn) break; 1714 1715 // dedicated bonding: send result and disconnect 1716 if (conn->bonding_flags & BONDING_DEDICATED){ 1717 conn->bonding_flags &= ~BONDING_DEDICATED; 1718 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1719 conn->bonding_status = packet[2]; 1720 break; 1721 } 1722 1723 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1724 // link key sufficient for requested security 1725 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1726 break; 1727 } 1728 // not enough 1729 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1730 break; 1731 1732 // HCI_EVENT_DISCONNECTION_COMPLETE 1733 // has been split, to first notify stack before shutting connection down 1734 // see end of function, too. 1735 case HCI_EVENT_DISCONNECTION_COMPLETE: 1736 if (packet[2]) break; // status != 0 1737 handle = little_endian_read_16(packet, 3); 1738 // drop outgoing ACL fragments if it is for closed connection 1739 if (hci_stack->acl_fragmentation_total_size > 0) { 1740 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1741 log_info("hci: drop fragmented ACL data for closed connection"); 1742 hci_stack->acl_fragmentation_total_size = 0; 1743 hci_stack->acl_fragmentation_pos = 0; 1744 } 1745 } 1746 // re-enable advertisements for le connections if active 1747 conn = hci_connection_for_handle(handle); 1748 if (!conn) break; 1749 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1750 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1751 } 1752 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1753 break; 1754 1755 case HCI_EVENT_HARDWARE_ERROR: 1756 log_error("Hardware Error: 0x%02x", packet[2]); 1757 if (hci_stack->hardware_error_callback){ 1758 (*hci_stack->hardware_error_callback)(packet[2]); 1759 } else { 1760 // if no special requests, just reboot stack 1761 hci_power_control_off(); 1762 hci_power_control_on(); 1763 } 1764 break; 1765 1766 case HCI_EVENT_ROLE_CHANGE: 1767 if (packet[2]) break; // status != 0 1768 handle = little_endian_read_16(packet, 3); 1769 conn = hci_connection_for_handle(handle); 1770 if (!conn) break; // no conn 1771 conn->role = packet[9]; 1772 break; 1773 1774 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1775 // release packet buffer only for asynchronous transport and if there are not further fragements 1776 if (hci_transport_synchronous()) { 1777 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1778 return; // instead of break: to avoid re-entering hci_run() 1779 } 1780 if (hci_stack->acl_fragmentation_total_size) break; 1781 hci_release_packet_buffer(); 1782 1783 // L2CAP receives this event via the hci_emit_event below 1784 1785 // For SCO, we do the can_send_now_check here 1786 hci_notify_if_sco_can_send_now(); 1787 break; 1788 1789 case HCI_EVENT_SCO_CAN_SEND_NOW: 1790 // For SCO, we do the can_send_now_check here 1791 hci_notify_if_sco_can_send_now(); 1792 return; 1793 1794 #ifdef ENABLE_BLE 1795 case HCI_EVENT_LE_META: 1796 switch (packet[2]){ 1797 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1798 // log_info("advertising report received"); 1799 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1800 le_handle_advertisement_report(packet, size); 1801 break; 1802 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1803 // Connection management 1804 reverse_bd_addr(&packet[8], addr); 1805 addr_type = (bd_addr_type_t)packet[7]; 1806 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1807 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1808 // if auto-connect, remove from whitelist in both roles 1809 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1810 hci_remove_from_whitelist(addr_type, addr); 1811 } 1812 // handle error: error is reported only to the initiator -> outgoing connection 1813 if (packet[3]){ 1814 // outgoing connection establishment is done 1815 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1816 // remove entry 1817 if (conn){ 1818 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1819 btstack_memory_hci_connection_free( conn ); 1820 } 1821 break; 1822 } 1823 // on success, both hosts receive connection complete event 1824 if (packet[6] == HCI_ROLE_MASTER){ 1825 // if we're master, it was an outgoing connection and we're done with it 1826 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1827 } else { 1828 // if we're slave, it was an incoming connection, advertisements have stopped 1829 hci_stack->le_advertisements_active = 0; 1830 } 1831 // LE connections are auto-accepted, so just create a connection if there isn't one already 1832 if (!conn){ 1833 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1834 } 1835 // no memory, sorry. 1836 if (!conn){ 1837 break; 1838 } 1839 1840 conn->state = OPEN; 1841 conn->role = packet[6]; 1842 conn->con_handle = little_endian_read_16(packet, 4); 1843 1844 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1845 1846 // restart timer 1847 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1848 // btstack_run_loop_add_timer(&conn->timeout); 1849 1850 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1851 1852 hci_emit_nr_connections_changed(); 1853 break; 1854 1855 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1856 1857 default: 1858 break; 1859 } 1860 break; 1861 #endif 1862 default: 1863 break; 1864 } 1865 1866 // handle BT initialization 1867 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1868 hci_initializing_event_handler(packet, size); 1869 } 1870 1871 // help with BT sleep 1872 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1873 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1874 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1875 hci_initializing_next_state(); 1876 } 1877 1878 // notify upper stack 1879 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1880 1881 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1882 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1883 if (!packet[2]){ 1884 handle = little_endian_read_16(packet, 3); 1885 hci_connection_t * aConn = hci_connection_for_handle(handle); 1886 if (aConn) { 1887 uint8_t status = aConn->bonding_status; 1888 uint16_t flags = aConn->bonding_flags; 1889 bd_addr_t bd_address; 1890 memcpy(&bd_address, aConn->address, 6); 1891 hci_shutdown_connection(aConn); 1892 // connection struct is gone, don't access anymore 1893 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1894 hci_emit_dedicated_bonding_result(bd_address, status); 1895 } 1896 } 1897 } 1898 } 1899 1900 // execute main loop 1901 hci_run(); 1902 } 1903 1904 static void sco_handler(uint8_t * packet, uint16_t size){ 1905 if (!hci_stack->sco_packet_handler) return; 1906 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1907 } 1908 1909 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1910 hci_dump_packet(packet_type, 1, packet, size); 1911 switch (packet_type) { 1912 case HCI_EVENT_PACKET: 1913 event_handler(packet, size); 1914 break; 1915 case HCI_ACL_DATA_PACKET: 1916 acl_handler(packet, size); 1917 break; 1918 case HCI_SCO_DATA_PACKET: 1919 sco_handler(packet, size); 1920 default: 1921 break; 1922 } 1923 } 1924 1925 /** 1926 * @brief Add event packet handler. 1927 */ 1928 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1929 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1930 } 1931 1932 1933 /** Register HCI packet handlers */ 1934 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 1935 hci_stack->acl_packet_handler = handler; 1936 } 1937 1938 /** 1939 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1940 */ 1941 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 1942 hci_stack->sco_packet_handler = handler; 1943 } 1944 1945 static void hci_state_reset(void){ 1946 // no connections yet 1947 hci_stack->connections = NULL; 1948 1949 // keep discoverable/connectable as this has been requested by the client(s) 1950 // hci_stack->discoverable = 0; 1951 // hci_stack->connectable = 0; 1952 // hci_stack->bondable = 1; 1953 1954 // buffer is free 1955 hci_stack->hci_packet_buffer_reserved = 0; 1956 1957 // no pending cmds 1958 hci_stack->decline_reason = 0; 1959 hci_stack->new_scan_enable_value = 0xff; 1960 1961 // LE 1962 hci_stack->adv_addr_type = 0; 1963 memset(hci_stack->adv_address, 0, 6); 1964 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1965 hci_stack->le_scan_type = 0xff; 1966 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1967 hci_stack->le_whitelist = 0; 1968 hci_stack->le_whitelist_capacity = 0; 1969 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1970 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1971 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1972 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1973 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1974 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1975 } 1976 1977 /** 1978 * @brief Configure Bluetooth hardware control. Has to be called before power on. 1979 */ 1980 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 1981 // store and open remote device db 1982 hci_stack->link_key_db = link_key_db; 1983 if (hci_stack->link_key_db) { 1984 hci_stack->link_key_db->open(); 1985 } 1986 } 1987 1988 void hci_init(const hci_transport_t *transport, const void *config){ 1989 1990 #ifdef HAVE_MALLOC 1991 if (!hci_stack) { 1992 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1993 } 1994 #else 1995 hci_stack = &hci_stack_static; 1996 #endif 1997 memset(hci_stack, 0, sizeof(hci_stack_t)); 1998 1999 // reference to use transport layer implementation 2000 hci_stack->hci_transport = transport; 2001 2002 // reference to used config 2003 hci_stack->config = config; 2004 2005 // setup pointer for outgoing packet buffer 2006 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2007 2008 // max acl payload size defined in config.h 2009 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2010 2011 // register packet handlers with transport 2012 transport->register_packet_handler(&packet_handler); 2013 2014 hci_stack->state = HCI_STATE_OFF; 2015 2016 // class of device 2017 hci_stack->class_of_device = 0x007a020c; // Smartphone 2018 2019 // bondable by default 2020 hci_stack->bondable = 1; 2021 2022 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2023 hci_stack->ssp_enable = 1; 2024 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2025 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2026 hci_stack->ssp_auto_accept = 1; 2027 2028 // voice setting - signed 8 bit pcm data with CVSD over the air 2029 hci_stack->sco_voice_setting = 0x40; 2030 2031 hci_state_reset(); 2032 } 2033 2034 /** 2035 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2036 */ 2037 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2038 hci_stack->chipset = chipset_driver; 2039 2040 // reset chipset driver - init is also called on power_up 2041 if (hci_stack->chipset && hci_stack->chipset->init){ 2042 hci_stack->chipset->init(hci_stack->config); 2043 } 2044 } 2045 2046 /** 2047 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2048 */ 2049 void hci_set_control(const btstack_control_t *hardware_control){ 2050 // references to used control implementation 2051 hci_stack->control = hardware_control; 2052 // init with transport config 2053 hardware_control->init(hci_stack->config); 2054 } 2055 2056 void hci_close(void){ 2057 // close remote device db 2058 if (hci_stack->link_key_db) { 2059 hci_stack->link_key_db->close(); 2060 } 2061 2062 btstack_linked_list_iterator_t lit; 2063 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2064 while (btstack_linked_list_iterator_has_next(&lit)){ 2065 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2066 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2067 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2068 hci_shutdown_connection(connection); 2069 } 2070 2071 hci_power_control(HCI_POWER_OFF); 2072 2073 #ifdef HAVE_MALLOC 2074 free(hci_stack); 2075 #endif 2076 hci_stack = NULL; 2077 } 2078 2079 void gap_set_class_of_device(uint32_t class_of_device){ 2080 hci_stack->class_of_device = class_of_device; 2081 } 2082 2083 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2084 void hci_set_bd_addr(bd_addr_t addr){ 2085 memcpy(hci_stack->custom_bd_addr, addr, 6); 2086 hci_stack->custom_bd_addr_set = 1; 2087 } 2088 2089 void hci_disable_l2cap_timeout_check(void){ 2090 disable_l2cap_timeouts = 1; 2091 } 2092 // State-Module-Driver overview 2093 // state module low-level 2094 // HCI_STATE_OFF off close 2095 // HCI_STATE_INITIALIZING, on open 2096 // HCI_STATE_WORKING, on open 2097 // HCI_STATE_HALTING, on open 2098 // HCI_STATE_SLEEPING, off/sleep close 2099 // HCI_STATE_FALLING_ASLEEP on open 2100 2101 static int hci_power_control_on(void){ 2102 2103 // power on 2104 int err = 0; 2105 if (hci_stack->control && hci_stack->control->on){ 2106 err = (*hci_stack->control->on)(); 2107 } 2108 if (err){ 2109 log_error( "POWER_ON failed"); 2110 hci_emit_hci_open_failed(); 2111 return err; 2112 } 2113 2114 // int chipset driver 2115 if (hci_stack->chipset && hci_stack->chipset->init){ 2116 hci_stack->chipset->init(hci_stack->config); 2117 } 2118 2119 // init transport 2120 if (hci_stack->hci_transport->init){ 2121 hci_stack->hci_transport->init(hci_stack->config); 2122 } 2123 2124 // open transport 2125 err = hci_stack->hci_transport->open(); 2126 if (err){ 2127 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2128 if (hci_stack->control && hci_stack->control->off){ 2129 (*hci_stack->control->off)(); 2130 } 2131 hci_emit_hci_open_failed(); 2132 return err; 2133 } 2134 return 0; 2135 } 2136 2137 static void hci_power_control_off(void){ 2138 2139 log_info("hci_power_control_off"); 2140 2141 // close low-level device 2142 hci_stack->hci_transport->close(); 2143 2144 log_info("hci_power_control_off - hci_transport closed"); 2145 2146 // power off 2147 if (hci_stack->control && hci_stack->control->off){ 2148 (*hci_stack->control->off)(); 2149 } 2150 2151 log_info("hci_power_control_off - control closed"); 2152 2153 hci_stack->state = HCI_STATE_OFF; 2154 } 2155 2156 static void hci_power_control_sleep(void){ 2157 2158 log_info("hci_power_control_sleep"); 2159 2160 #if 0 2161 // don't close serial port during sleep 2162 2163 // close low-level device 2164 hci_stack->hci_transport->close(hci_stack->config); 2165 #endif 2166 2167 // sleep mode 2168 if (hci_stack->control && hci_stack->control->sleep){ 2169 (*hci_stack->control->sleep)(); 2170 } 2171 2172 hci_stack->state = HCI_STATE_SLEEPING; 2173 } 2174 2175 static int hci_power_control_wake(void){ 2176 2177 log_info("hci_power_control_wake"); 2178 2179 // wake on 2180 if (hci_stack->control && hci_stack->control->wake){ 2181 (*hci_stack->control->wake)(); 2182 } 2183 2184 #if 0 2185 // open low-level device 2186 int err = hci_stack->hci_transport->open(hci_stack->config); 2187 if (err){ 2188 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2189 if (hci_stack->control && hci_stack->control->off){ 2190 (*hci_stack->control->off)(); 2191 } 2192 hci_emit_hci_open_failed(); 2193 return err; 2194 } 2195 #endif 2196 2197 return 0; 2198 } 2199 2200 static void hci_power_transition_to_initializing(void){ 2201 // set up state machine 2202 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2203 hci_stack->hci_packet_buffer_reserved = 0; 2204 hci_stack->state = HCI_STATE_INITIALIZING; 2205 hci_stack->substate = HCI_INIT_SEND_RESET; 2206 } 2207 2208 int hci_power_control(HCI_POWER_MODE power_mode){ 2209 2210 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2211 2212 int err = 0; 2213 switch (hci_stack->state){ 2214 2215 case HCI_STATE_OFF: 2216 switch (power_mode){ 2217 case HCI_POWER_ON: 2218 err = hci_power_control_on(); 2219 if (err) { 2220 log_error("hci_power_control_on() error %u", err); 2221 return err; 2222 } 2223 hci_power_transition_to_initializing(); 2224 break; 2225 case HCI_POWER_OFF: 2226 // do nothing 2227 break; 2228 case HCI_POWER_SLEEP: 2229 // do nothing (with SLEEP == OFF) 2230 break; 2231 } 2232 break; 2233 2234 case HCI_STATE_INITIALIZING: 2235 switch (power_mode){ 2236 case HCI_POWER_ON: 2237 // do nothing 2238 break; 2239 case HCI_POWER_OFF: 2240 // no connections yet, just turn it off 2241 hci_power_control_off(); 2242 break; 2243 case HCI_POWER_SLEEP: 2244 // no connections yet, just turn it off 2245 hci_power_control_sleep(); 2246 break; 2247 } 2248 break; 2249 2250 case HCI_STATE_WORKING: 2251 switch (power_mode){ 2252 case HCI_POWER_ON: 2253 // do nothing 2254 break; 2255 case HCI_POWER_OFF: 2256 // see hci_run 2257 hci_stack->state = HCI_STATE_HALTING; 2258 break; 2259 case HCI_POWER_SLEEP: 2260 // see hci_run 2261 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2262 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2263 break; 2264 } 2265 break; 2266 2267 case HCI_STATE_HALTING: 2268 switch (power_mode){ 2269 case HCI_POWER_ON: 2270 hci_power_transition_to_initializing(); 2271 break; 2272 case HCI_POWER_OFF: 2273 // do nothing 2274 break; 2275 case HCI_POWER_SLEEP: 2276 // see hci_run 2277 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2278 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2279 break; 2280 } 2281 break; 2282 2283 case HCI_STATE_FALLING_ASLEEP: 2284 switch (power_mode){ 2285 case HCI_POWER_ON: 2286 2287 #ifdef HAVE_PLATFORM_IPHONE_OS 2288 // nothing to do, if H4 supports power management 2289 if (btstack_control_iphone_power_management_enabled()){ 2290 hci_stack->state = HCI_STATE_INITIALIZING; 2291 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2292 break; 2293 } 2294 #endif 2295 hci_power_transition_to_initializing(); 2296 break; 2297 case HCI_POWER_OFF: 2298 // see hci_run 2299 hci_stack->state = HCI_STATE_HALTING; 2300 break; 2301 case HCI_POWER_SLEEP: 2302 // do nothing 2303 break; 2304 } 2305 break; 2306 2307 case HCI_STATE_SLEEPING: 2308 switch (power_mode){ 2309 case HCI_POWER_ON: 2310 2311 #ifdef HAVE_PLATFORM_IPHONE_OS 2312 // nothing to do, if H4 supports power management 2313 if (btstack_control_iphone_power_management_enabled()){ 2314 hci_stack->state = HCI_STATE_INITIALIZING; 2315 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2316 hci_update_scan_enable(); 2317 break; 2318 } 2319 #endif 2320 err = hci_power_control_wake(); 2321 if (err) return err; 2322 hci_power_transition_to_initializing(); 2323 break; 2324 case HCI_POWER_OFF: 2325 hci_stack->state = HCI_STATE_HALTING; 2326 break; 2327 case HCI_POWER_SLEEP: 2328 // do nothing 2329 break; 2330 } 2331 break; 2332 } 2333 2334 // create internal event 2335 hci_emit_state(); 2336 2337 // trigger next/first action 2338 hci_run(); 2339 2340 return 0; 2341 } 2342 2343 static void hci_update_scan_enable(void){ 2344 // 2 = page scan, 1 = inq scan 2345 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2346 hci_run(); 2347 } 2348 2349 void gap_discoverable_control(uint8_t enable){ 2350 if (enable) enable = 1; // normalize argument 2351 2352 if (hci_stack->discoverable == enable){ 2353 hci_emit_discoverable_enabled(hci_stack->discoverable); 2354 return; 2355 } 2356 2357 hci_stack->discoverable = enable; 2358 hci_update_scan_enable(); 2359 } 2360 2361 void gap_connectable_control(uint8_t enable){ 2362 if (enable) enable = 1; // normalize argument 2363 2364 // don't emit event 2365 if (hci_stack->connectable == enable) return; 2366 2367 hci_stack->connectable = enable; 2368 hci_update_scan_enable(); 2369 } 2370 2371 void gap_local_bd_addr(bd_addr_t address_buffer){ 2372 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2373 } 2374 2375 static void hci_run(void){ 2376 2377 // log_info("hci_run: entered"); 2378 btstack_linked_item_t * it; 2379 2380 // send continuation fragments first, as they block the prepared packet buffer 2381 if (hci_stack->acl_fragmentation_total_size > 0) { 2382 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2383 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2384 if (connection) { 2385 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2386 hci_send_acl_packet_fragments(connection); 2387 return; 2388 } 2389 } else { 2390 // connection gone -> discard further fragments 2391 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2392 hci_stack->acl_fragmentation_total_size = 0; 2393 hci_stack->acl_fragmentation_pos = 0; 2394 } 2395 } 2396 2397 if (!hci_can_send_command_packet_now()) return; 2398 2399 // global/non-connection oriented commands 2400 2401 // decline incoming connections 2402 if (hci_stack->decline_reason){ 2403 uint8_t reason = hci_stack->decline_reason; 2404 hci_stack->decline_reason = 0; 2405 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2406 return; 2407 } 2408 2409 // send scan enable 2410 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2411 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2412 hci_stack->new_scan_enable_value = 0xff; 2413 return; 2414 } 2415 2416 #ifdef ENABLE_BLE 2417 if (hci_stack->state == HCI_STATE_WORKING){ 2418 // handle le scan 2419 switch(hci_stack->le_scanning_state){ 2420 case LE_START_SCAN: 2421 hci_stack->le_scanning_state = LE_SCANNING; 2422 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2423 return; 2424 2425 case LE_STOP_SCAN: 2426 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2427 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2428 return; 2429 default: 2430 break; 2431 } 2432 if (hci_stack->le_scan_type != 0xff){ 2433 // defaults: active scanning, accept all advertisement packets 2434 int scan_type = hci_stack->le_scan_type; 2435 hci_stack->le_scan_type = 0xff; 2436 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); 2437 return; 2438 } 2439 // le advertisement control 2440 if (hci_stack->le_advertisements_todo){ 2441 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2442 } 2443 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2444 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2445 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2446 return; 2447 } 2448 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2449 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2450 hci_send_cmd(&hci_le_set_advertising_parameters, 2451 hci_stack->le_advertisements_interval_min, 2452 hci_stack->le_advertisements_interval_max, 2453 hci_stack->le_advertisements_type, 2454 hci_stack->le_advertisements_own_address_type, 2455 hci_stack->le_advertisements_direct_address_type, 2456 hci_stack->le_advertisements_direct_address, 2457 hci_stack->le_advertisements_channel_map, 2458 hci_stack->le_advertisements_filter_policy); 2459 return; 2460 } 2461 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2462 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2463 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2464 hci_stack->le_advertisements_data); 2465 return; 2466 } 2467 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2468 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2469 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2470 hci_stack->le_scan_response_data); 2471 return; 2472 } 2473 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2474 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2475 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2476 return; 2477 } 2478 2479 // 2480 // LE Whitelist Management 2481 // 2482 2483 // check if whitelist needs modification 2484 btstack_linked_list_iterator_t lit; 2485 int modification_pending = 0; 2486 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2487 while (btstack_linked_list_iterator_has_next(&lit)){ 2488 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2489 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2490 modification_pending = 1; 2491 break; 2492 } 2493 } 2494 2495 if (modification_pending){ 2496 // stop connnecting if modification pending 2497 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2498 hci_send_cmd(&hci_le_create_connection_cancel); 2499 return; 2500 } 2501 2502 // add/remove entries 2503 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2504 while (btstack_linked_list_iterator_has_next(&lit)){ 2505 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2506 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2507 entry->state = LE_WHITELIST_ON_CONTROLLER; 2508 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2509 return; 2510 2511 } 2512 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2513 bd_addr_t address; 2514 bd_addr_type_t address_type = entry->address_type; 2515 memcpy(address, entry->address, 6); 2516 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2517 btstack_memory_whitelist_entry_free(entry); 2518 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2519 return; 2520 } 2521 } 2522 } 2523 2524 // start connecting 2525 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2526 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2527 bd_addr_t null_addr; 2528 memset(null_addr, 0, 6); 2529 hci_send_cmd(&hci_le_create_connection, 2530 0x0060, // scan interval: 60 ms 2531 0x0030, // scan interval: 30 ms 2532 1, // use whitelist 2533 0, // peer address type 2534 null_addr, // peer bd addr 2535 hci_stack->adv_addr_type, // our addr type: 2536 0x0008, // conn interval min 2537 0x0018, // conn interval max 2538 0, // conn latency 2539 0x0048, // supervision timeout 2540 0x0001, // min ce length 2541 0x0001 // max ce length 2542 ); 2543 return; 2544 } 2545 } 2546 #endif 2547 2548 // send pending HCI commands 2549 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2550 hci_connection_t * connection = (hci_connection_t *) it; 2551 2552 switch(connection->state){ 2553 case SEND_CREATE_CONNECTION: 2554 switch(connection->address_type){ 2555 case BD_ADDR_TYPE_CLASSIC: 2556 log_info("sending hci_create_connection"); 2557 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2558 break; 2559 default: 2560 #ifdef ENABLE_BLE 2561 log_info("sending hci_le_create_connection"); 2562 hci_send_cmd(&hci_le_create_connection, 2563 0x0060, // scan interval: 60 ms 2564 0x0030, // scan interval: 30 ms 2565 0, // don't use whitelist 2566 connection->address_type, // peer address type 2567 connection->address, // peer bd addr 2568 hci_stack->adv_addr_type, // our addr type: 2569 0x0008, // conn interval min 2570 0x0018, // conn interval max 2571 0, // conn latency 2572 0x0048, // supervision timeout 2573 0x0001, // min ce length 2574 0x0001 // max ce length 2575 ); 2576 2577 connection->state = SENT_CREATE_CONNECTION; 2578 #endif 2579 break; 2580 } 2581 return; 2582 2583 case RECEIVED_CONNECTION_REQUEST: 2584 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2585 connection->state = ACCEPTED_CONNECTION_REQUEST; 2586 connection->role = HCI_ROLE_SLAVE; 2587 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2588 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2589 } 2590 return; 2591 2592 #ifdef ENABLE_BLE 2593 case SEND_CANCEL_CONNECTION: 2594 connection->state = SENT_CANCEL_CONNECTION; 2595 hci_send_cmd(&hci_le_create_connection_cancel); 2596 return; 2597 #endif 2598 case SEND_DISCONNECT: 2599 connection->state = SENT_DISCONNECT; 2600 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2601 return; 2602 2603 default: 2604 break; 2605 } 2606 2607 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2608 log_info("responding to link key request"); 2609 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2610 link_key_t link_key; 2611 link_key_type_t link_key_type; 2612 if ( hci_stack->link_key_db 2613 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2614 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2615 connection->link_key_type = link_key_type; 2616 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2617 } else { 2618 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2619 } 2620 return; 2621 } 2622 2623 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2624 log_info("denying to pin request"); 2625 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2626 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2627 return; 2628 } 2629 2630 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2631 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2632 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2633 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2634 // tweak authentication requirements 2635 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2636 if (connection->bonding_flags & BONDING_DEDICATED){ 2637 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2638 } 2639 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2640 authreq |= 1; 2641 } 2642 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2643 } else { 2644 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2645 } 2646 return; 2647 } 2648 2649 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2650 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2651 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2652 return; 2653 } 2654 2655 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2656 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2657 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2658 return; 2659 } 2660 2661 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2662 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2663 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2664 return; 2665 } 2666 2667 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2668 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2669 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2670 return; 2671 } 2672 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2673 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2674 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2675 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2676 return; 2677 } 2678 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2679 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2680 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2681 return; 2682 } 2683 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2684 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2685 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2686 return; 2687 } 2688 2689 #ifdef ENABLE_BLE 2690 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2691 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2692 2693 uint16_t connection_interval_min = connection->le_conn_interval_min; 2694 connection->le_conn_interval_min = 0; 2695 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2696 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2697 0x0000, 0xffff); 2698 } 2699 #endif 2700 } 2701 2702 hci_connection_t * connection; 2703 switch (hci_stack->state){ 2704 case HCI_STATE_INITIALIZING: 2705 hci_initializing_run(); 2706 break; 2707 2708 case HCI_STATE_HALTING: 2709 2710 log_info("HCI_STATE_HALTING"); 2711 2712 // free whitelist entries 2713 #ifdef ENABLE_BLE 2714 { 2715 btstack_linked_list_iterator_t lit; 2716 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2717 while (btstack_linked_list_iterator_has_next(&lit)){ 2718 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2719 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2720 btstack_memory_whitelist_entry_free(entry); 2721 } 2722 } 2723 #endif 2724 // close all open connections 2725 connection = (hci_connection_t *) hci_stack->connections; 2726 if (connection){ 2727 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2728 if (!hci_can_send_command_packet_now()) return; 2729 2730 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2731 2732 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2733 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2734 2735 // ... which would be ignored anyway as we shutdown (free) the connection now 2736 hci_shutdown_connection(connection); 2737 2738 // finally, send the disconnect command 2739 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2740 return; 2741 } 2742 log_info("HCI_STATE_HALTING, calling off"); 2743 2744 // switch mode 2745 hci_power_control_off(); 2746 2747 log_info("HCI_STATE_HALTING, emitting state"); 2748 hci_emit_state(); 2749 log_info("HCI_STATE_HALTING, done"); 2750 break; 2751 2752 case HCI_STATE_FALLING_ASLEEP: 2753 switch(hci_stack->substate) { 2754 case HCI_FALLING_ASLEEP_DISCONNECT: 2755 log_info("HCI_STATE_FALLING_ASLEEP"); 2756 // close all open connections 2757 connection = (hci_connection_t *) hci_stack->connections; 2758 2759 #ifdef HAVE_PLATFORM_IPHONE_OS 2760 // don't close connections, if H4 supports power management 2761 if (btstack_control_iphone_power_management_enabled()){ 2762 connection = NULL; 2763 } 2764 #endif 2765 if (connection){ 2766 2767 // send disconnect 2768 if (!hci_can_send_command_packet_now()) return; 2769 2770 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2771 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2772 2773 // send disconnected event right away - causes higher layer connections to get closed, too. 2774 hci_shutdown_connection(connection); 2775 return; 2776 } 2777 2778 if (hci_classic_supported()){ 2779 // disable page and inquiry scan 2780 if (!hci_can_send_command_packet_now()) return; 2781 2782 log_info("HCI_STATE_HALTING, disabling inq scans"); 2783 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2784 2785 // continue in next sub state 2786 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2787 break; 2788 } 2789 // fall through for ble-only chips 2790 2791 case HCI_FALLING_ASLEEP_COMPLETE: 2792 log_info("HCI_STATE_HALTING, calling sleep"); 2793 #ifdef HAVE_PLATFORM_IPHONE_OS 2794 // don't actually go to sleep, if H4 supports power management 2795 if (btstack_control_iphone_power_management_enabled()){ 2796 // SLEEP MODE reached 2797 hci_stack->state = HCI_STATE_SLEEPING; 2798 hci_emit_state(); 2799 break; 2800 } 2801 #endif 2802 // switch mode 2803 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2804 hci_emit_state(); 2805 break; 2806 2807 default: 2808 break; 2809 } 2810 break; 2811 2812 default: 2813 break; 2814 } 2815 } 2816 2817 int hci_send_cmd_packet(uint8_t *packet, int size){ 2818 bd_addr_t addr; 2819 hci_connection_t * conn; 2820 // house-keeping 2821 2822 // create_connection? 2823 if (IS_COMMAND(packet, hci_create_connection)){ 2824 reverse_bd_addr(&packet[3], addr); 2825 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2826 2827 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2828 if (!conn){ 2829 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2830 if (!conn){ 2831 // notify client that alloc failed 2832 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2833 return 0; // don't sent packet to controller 2834 } 2835 conn->state = SEND_CREATE_CONNECTION; 2836 } 2837 log_info("conn state %u", conn->state); 2838 switch (conn->state){ 2839 // if connection active exists 2840 case OPEN: 2841 // and OPEN, emit connection complete command, don't send to controller 2842 hci_emit_connection_complete(addr, conn->con_handle, 0); 2843 return 0; 2844 case SEND_CREATE_CONNECTION: 2845 // connection created by hci, e.g. dedicated bonding 2846 break; 2847 default: 2848 // otherwise, just ignore as it is already in the open process 2849 return 0; 2850 } 2851 conn->state = SENT_CREATE_CONNECTION; 2852 } 2853 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2854 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2855 } 2856 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2857 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2858 } 2859 2860 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2861 if (hci_stack->link_key_db){ 2862 reverse_bd_addr(&packet[3], addr); 2863 hci_stack->link_key_db->delete_link_key(addr); 2864 } 2865 } 2866 2867 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2868 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2869 reverse_bd_addr(&packet[3], addr); 2870 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2871 if (conn){ 2872 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2873 } 2874 } 2875 2876 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2877 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2878 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2879 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2880 reverse_bd_addr(&packet[3], addr); 2881 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2882 if (conn){ 2883 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2884 } 2885 } 2886 2887 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2888 hci_stack->loopback_mode = packet[3]; 2889 } 2890 2891 #ifdef ENABLE_BLE 2892 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2893 hci_stack->adv_addr_type = packet[8]; 2894 } 2895 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2896 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2897 } 2898 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2899 hci_stack->le_advertisements_active = packet[3]; 2900 } 2901 if (IS_COMMAND(packet, hci_le_create_connection)){ 2902 // white list used? 2903 uint8_t initiator_filter_policy = packet[7]; 2904 switch (initiator_filter_policy){ 2905 case 0: 2906 // whitelist not used 2907 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2908 break; 2909 case 1: 2910 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2911 break; 2912 default: 2913 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2914 break; 2915 } 2916 } 2917 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2918 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2919 } 2920 #endif 2921 2922 hci_stack->num_cmd_packets--; 2923 2924 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2925 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2926 2927 // release packet buffer for synchronous transport implementations 2928 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2929 hci_stack->hci_packet_buffer_reserved = 0; 2930 } 2931 2932 return err; 2933 } 2934 2935 // disconnect because of security block 2936 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2937 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2938 if (!connection) return; 2939 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2940 } 2941 2942 2943 // Configure Secure Simple Pairing 2944 2945 // enable will enable SSP during init 2946 void gap_ssp_set_enable(int enable){ 2947 hci_stack->ssp_enable = enable; 2948 } 2949 2950 static int hci_local_ssp_activated(void){ 2951 return gap_ssp_supported() && hci_stack->ssp_enable; 2952 } 2953 2954 // if set, BTstack will respond to io capability request using authentication requirement 2955 void gap_ssp_set_io_capability(int io_capability){ 2956 hci_stack->ssp_io_capability = io_capability; 2957 } 2958 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 2959 hci_stack->ssp_authentication_requirement = authentication_requirement; 2960 } 2961 2962 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2963 void gap_ssp_set_auto_accept(int auto_accept){ 2964 hci_stack->ssp_auto_accept = auto_accept; 2965 } 2966 2967 /** 2968 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2969 */ 2970 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2971 2972 if (!hci_can_send_command_packet_now()){ 2973 log_error("hci_send_cmd called but cannot send packet now"); 2974 return 0; 2975 } 2976 2977 // for HCI INITIALIZATION 2978 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2979 hci_stack->last_cmd_opcode = cmd->opcode; 2980 2981 hci_reserve_packet_buffer(); 2982 uint8_t * packet = hci_stack->hci_packet_buffer; 2983 2984 va_list argptr; 2985 va_start(argptr, cmd); 2986 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 2987 va_end(argptr); 2988 2989 return hci_send_cmd_packet(packet, size); 2990 } 2991 2992 // Create various non-HCI events. 2993 // TODO: generalize, use table similar to hci_create_command 2994 2995 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 2996 // dump packet 2997 if (dump) { 2998 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 2999 } 3000 3001 // dispatch to all event handlers 3002 btstack_linked_list_iterator_t it; 3003 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3004 while (btstack_linked_list_iterator_has_next(&it)){ 3005 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3006 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3007 } 3008 } 3009 3010 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3011 if (!hci_stack->acl_packet_handler) return; 3012 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3013 } 3014 3015 static void hci_notify_if_sco_can_send_now(void){ 3016 // notify SCO sender if waiting 3017 if (!hci_stack->sco_waiting_for_can_send_now) return; 3018 if (hci_can_send_sco_packet_now()){ 3019 hci_stack->sco_waiting_for_can_send_now = 0; 3020 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3021 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3022 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3023 } 3024 } 3025 3026 void hci_emit_state(void){ 3027 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3028 uint8_t event[3]; 3029 event[0] = BTSTACK_EVENT_STATE; 3030 event[1] = sizeof(event) - 2; 3031 event[2] = hci_stack->state; 3032 hci_emit_event(event, sizeof(event), 1); 3033 } 3034 3035 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3036 uint8_t event[13]; 3037 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3038 event[1] = sizeof(event) - 2; 3039 event[2] = status; 3040 little_endian_store_16(event, 3, con_handle); 3041 reverse_bd_addr(address, &event[5]); 3042 event[11] = 1; // ACL connection 3043 event[12] = 0; // encryption disabled 3044 hci_emit_event(event, sizeof(event), 1); 3045 } 3046 3047 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3048 uint8_t event[21]; 3049 event[0] = HCI_EVENT_LE_META; 3050 event[1] = sizeof(event) - 2; 3051 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3052 event[3] = status; 3053 little_endian_store_16(event, 4, con_handle); 3054 event[6] = 0; // TODO: role 3055 event[7] = address_type; 3056 reverse_bd_addr(address, &event[8]); 3057 little_endian_store_16(event, 14, 0); // interval 3058 little_endian_store_16(event, 16, 0); // latency 3059 little_endian_store_16(event, 18, 0); // supervision timeout 3060 event[20] = 0; // master clock accuracy 3061 hci_emit_event(event, sizeof(event), 1); 3062 } 3063 3064 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3065 uint8_t event[6]; 3066 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3067 event[1] = sizeof(event) - 2; 3068 event[2] = 0; // status = OK 3069 little_endian_store_16(event, 3, con_handle); 3070 event[5] = reason; 3071 hci_emit_event(event, sizeof(event), 1); 3072 } 3073 3074 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3075 if (disable_l2cap_timeouts) return; 3076 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3077 uint8_t event[4]; 3078 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3079 event[1] = sizeof(event) - 2; 3080 little_endian_store_16(event, 2, conn->con_handle); 3081 hci_emit_event(event, sizeof(event), 1); 3082 } 3083 3084 static void hci_emit_nr_connections_changed(void){ 3085 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3086 uint8_t event[3]; 3087 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3088 event[1] = sizeof(event) - 2; 3089 event[2] = nr_hci_connections(); 3090 hci_emit_event(event, sizeof(event), 1); 3091 } 3092 3093 static void hci_emit_hci_open_failed(void){ 3094 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3095 uint8_t event[2]; 3096 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3097 event[1] = sizeof(event) - 2; 3098 hci_emit_event(event, sizeof(event), 1); 3099 } 3100 3101 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3102 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3103 uint8_t event[3]; 3104 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3105 event[1] = sizeof(event) - 2; 3106 event[2] = enabled; 3107 hci_emit_event(event, sizeof(event), 1); 3108 } 3109 3110 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3111 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3112 uint8_t event[5]; 3113 int pos = 0; 3114 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3115 event[pos++] = sizeof(event) - 2; 3116 little_endian_store_16(event, 2, con_handle); 3117 pos += 2; 3118 event[pos++] = level; 3119 hci_emit_event(event, sizeof(event), 1); 3120 } 3121 3122 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3123 log_info("hci_emit_dedicated_bonding_result %u ", status); 3124 uint8_t event[9]; 3125 int pos = 0; 3126 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3127 event[pos++] = sizeof(event) - 2; 3128 event[pos++] = status; 3129 reverse_bd_addr(address, &event[pos]); 3130 hci_emit_event(event, sizeof(event), 1); 3131 } 3132 3133 // query if remote side supports eSCO 3134 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3135 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3136 if (!connection) return 0; 3137 return connection->remote_supported_feature_eSCO; 3138 } 3139 3140 // query if remote side supports SSP 3141 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3142 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3143 if (!connection) return 0; 3144 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3145 } 3146 3147 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3148 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3149 } 3150 3151 // GAP API 3152 /** 3153 * @bbrief enable/disable bonding. default is enabled 3154 * @praram enabled 3155 */ 3156 void gap_set_bondable_mode(int enable){ 3157 hci_stack->bondable = enable ? 1 : 0; 3158 } 3159 /** 3160 * @brief Get bondable mode. 3161 * @return 1 if bondable 3162 */ 3163 int gap_get_bondable_mode(void){ 3164 return hci_stack->bondable; 3165 } 3166 3167 /** 3168 * @brief map link keys to security levels 3169 */ 3170 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3171 switch (link_key_type){ 3172 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3173 return LEVEL_4; 3174 case COMBINATION_KEY: 3175 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3176 return LEVEL_3; 3177 default: 3178 return LEVEL_2; 3179 } 3180 } 3181 3182 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3183 if (!connection) return LEVEL_0; 3184 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3185 return gap_security_level_for_link_key_type(connection->link_key_type); 3186 } 3187 3188 3189 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3190 log_info("gap_mitm_protection_required_for_security_level %u", level); 3191 return level > LEVEL_2; 3192 } 3193 3194 /** 3195 * @brief get current security level 3196 */ 3197 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3198 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3199 if (!connection) return LEVEL_0; 3200 return gap_security_level_for_connection(connection); 3201 } 3202 3203 /** 3204 * @brief request connection to device to 3205 * @result GAP_AUTHENTICATION_RESULT 3206 */ 3207 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3208 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3209 if (!connection){ 3210 hci_emit_security_level(con_handle, LEVEL_0); 3211 return; 3212 } 3213 gap_security_level_t current_level = gap_security_level(con_handle); 3214 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3215 if (current_level >= requested_level){ 3216 hci_emit_security_level(con_handle, current_level); 3217 return; 3218 } 3219 3220 connection->requested_security_level = requested_level; 3221 3222 #if 0 3223 // sending encryption request without a link key results in an error. 3224 // TODO: figure out how to use it properly 3225 3226 // would enabling ecnryption suffice (>= LEVEL_2)? 3227 if (hci_stack->link_key_db){ 3228 link_key_type_t link_key_type; 3229 link_key_t link_key; 3230 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3231 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3232 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3233 return; 3234 } 3235 } 3236 } 3237 #endif 3238 3239 // try to authenticate connection 3240 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3241 hci_run(); 3242 } 3243 3244 /** 3245 * @brief start dedicated bonding with device. disconnect after bonding 3246 * @param device 3247 * @param request MITM protection 3248 * @result GAP_DEDICATED_BONDING_COMPLETE 3249 */ 3250 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3251 3252 // create connection state machine 3253 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3254 3255 if (!connection){ 3256 return BTSTACK_MEMORY_ALLOC_FAILED; 3257 } 3258 3259 // delete linkn key 3260 gap_drop_link_key_for_bd_addr(device); 3261 3262 // configure LEVEL_2/3, dedicated bonding 3263 connection->state = SEND_CREATE_CONNECTION; 3264 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3265 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3266 connection->bonding_flags = BONDING_DEDICATED; 3267 3268 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3269 3270 // handle: connnection failure (connection complete != ok) 3271 // handle: authentication failure 3272 // handle: disconnect on done 3273 3274 hci_run(); 3275 3276 return 0; 3277 } 3278 3279 void gap_set_local_name(const char * local_name){ 3280 hci_stack->local_name = local_name; 3281 } 3282 3283 void gap_start_scan(void){ 3284 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3285 hci_stack->le_scanning_state = LE_START_SCAN; 3286 hci_run(); 3287 } 3288 3289 void gap_stop_scan(void){ 3290 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3291 hci_stack->le_scanning_state = LE_STOP_SCAN; 3292 hci_run(); 3293 } 3294 3295 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3296 hci_stack->le_scan_type = scan_type; 3297 hci_stack->le_scan_interval = scan_interval; 3298 hci_stack->le_scan_window = scan_window; 3299 hci_run(); 3300 } 3301 3302 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3303 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3304 if (!conn){ 3305 log_info("gap_connect: no connection exists yet, creating context"); 3306 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3307 if (!conn){ 3308 // notify client that alloc failed 3309 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3310 log_info("gap_connect: failed to alloc hci_connection_t"); 3311 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3312 } 3313 conn->state = SEND_CREATE_CONNECTION; 3314 log_info("gap_connect: send create connection next"); 3315 hci_run(); 3316 return 0; 3317 } 3318 3319 if (!hci_is_le_connection(conn) || 3320 conn->state == SEND_CREATE_CONNECTION || 3321 conn->state == SENT_CREATE_CONNECTION) { 3322 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3323 log_error("gap_connect: classic connection or connect is already being created"); 3324 return GATT_CLIENT_IN_WRONG_STATE; 3325 } 3326 3327 log_info("gap_connect: context exists with state %u", conn->state); 3328 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3329 hci_run(); 3330 return 0; 3331 } 3332 3333 // @assumption: only a single outgoing LE Connection exists 3334 static hci_connection_t * gap_get_outgoing_connection(void){ 3335 btstack_linked_item_t *it; 3336 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3337 hci_connection_t * conn = (hci_connection_t *) it; 3338 if (!hci_is_le_connection(conn)) continue; 3339 switch (conn->state){ 3340 case SEND_CREATE_CONNECTION: 3341 case SENT_CREATE_CONNECTION: 3342 return conn; 3343 default: 3344 break; 3345 }; 3346 } 3347 return NULL; 3348 } 3349 3350 uint8_t gap_connect_cancel(void){ 3351 hci_connection_t * conn = gap_get_outgoing_connection(); 3352 if (!conn) return 0; 3353 switch (conn->state){ 3354 case SEND_CREATE_CONNECTION: 3355 // skip sending create connection and emit event instead 3356 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3357 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3358 btstack_memory_hci_connection_free( conn ); 3359 break; 3360 case SENT_CREATE_CONNECTION: 3361 // request to send cancel connection 3362 conn->state = SEND_CANCEL_CONNECTION; 3363 hci_run(); 3364 break; 3365 default: 3366 break; 3367 } 3368 return 0; 3369 } 3370 3371 /** 3372 * @brief Updates the connection parameters for a given LE connection 3373 * @param handle 3374 * @param conn_interval_min (unit: 1.25ms) 3375 * @param conn_interval_max (unit: 1.25ms) 3376 * @param conn_latency 3377 * @param supervision_timeout (unit: 10ms) 3378 * @returns 0 if ok 3379 */ 3380 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3381 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3382 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3383 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3384 connection->le_conn_interval_min = conn_interval_min; 3385 connection->le_conn_interval_max = conn_interval_max; 3386 connection->le_conn_latency = conn_latency; 3387 connection->le_supervision_timeout = supervision_timeout; 3388 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3389 hci_run(); 3390 return 0; 3391 } 3392 3393 /** 3394 * @brief Request an update of the connection parameter for a given LE connection 3395 * @param handle 3396 * @param conn_interval_min (unit: 1.25ms) 3397 * @param conn_interval_max (unit: 1.25ms) 3398 * @param conn_latency 3399 * @param supervision_timeout (unit: 10ms) 3400 * @returns 0 if ok 3401 */ 3402 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3403 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3404 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3405 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3406 connection->le_conn_interval_min = conn_interval_min; 3407 connection->le_conn_interval_max = conn_interval_max; 3408 connection->le_conn_latency = conn_latency; 3409 connection->le_supervision_timeout = supervision_timeout; 3410 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3411 hci_run(); 3412 return 0; 3413 } 3414 3415 static void gap_advertisments_changed(void){ 3416 // disable advertisements before updating adv, scan data, or adv params 3417 if (hci_stack->le_advertisements_active){ 3418 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3419 } 3420 hci_run(); 3421 } 3422 3423 /** 3424 * @brief Set Advertisement Data 3425 * @param advertising_data_length 3426 * @param advertising_data (max 31 octets) 3427 * @note data is not copied, pointer has to stay valid 3428 */ 3429 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3430 hci_stack->le_advertisements_data_len = advertising_data_length; 3431 hci_stack->le_advertisements_data = advertising_data; 3432 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3433 gap_advertisments_changed(); 3434 } 3435 3436 /** 3437 * @brief Set Scan Response Data 3438 * @param advertising_data_length 3439 * @param advertising_data (max 31 octets) 3440 * @note data is not copied, pointer has to stay valid 3441 */ 3442 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3443 hci_stack->le_scan_response_data_len = scan_response_data_length; 3444 hci_stack->le_scan_response_data = scan_response_data; 3445 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3446 gap_advertisments_changed(); 3447 } 3448 3449 /** 3450 * @brief Set Advertisement Parameters 3451 * @param adv_int_min 3452 * @param adv_int_max 3453 * @param adv_type 3454 * @param own_address_type 3455 * @param direct_address_type 3456 * @param direct_address 3457 * @param channel_map 3458 * @param filter_policy 3459 * 3460 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3461 */ 3462 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3463 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3464 uint8_t channel_map, uint8_t filter_policy) { 3465 3466 hci_stack->le_advertisements_interval_min = adv_int_min; 3467 hci_stack->le_advertisements_interval_max = adv_int_max; 3468 hci_stack->le_advertisements_type = adv_type; 3469 hci_stack->le_advertisements_own_address_type = own_address_type; 3470 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3471 hci_stack->le_advertisements_channel_map = channel_map; 3472 hci_stack->le_advertisements_filter_policy = filter_policy; 3473 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3474 3475 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3476 gap_advertisments_changed(); 3477 } 3478 3479 /** 3480 * @brief Enable/Disable Advertisements 3481 * @param enabled 3482 */ 3483 void gap_advertisements_enable(int enabled){ 3484 hci_stack->le_advertisements_enabled = enabled; 3485 if (enabled && !hci_stack->le_advertisements_active){ 3486 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3487 } 3488 if (!enabled && hci_stack->le_advertisements_active){ 3489 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3490 } 3491 hci_run(); 3492 } 3493 3494 3495 uint8_t gap_disconnect(hci_con_handle_t handle){ 3496 hci_connection_t * conn = hci_connection_for_handle(handle); 3497 if (!conn){ 3498 hci_emit_disconnection_complete(handle, 0); 3499 return 0; 3500 } 3501 conn->state = SEND_DISCONNECT; 3502 hci_run(); 3503 return 0; 3504 } 3505 3506 /** 3507 * @brief Get connection type 3508 * @param con_handle 3509 * @result connection_type 3510 */ 3511 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3512 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3513 if (!conn) return GAP_CONNECTION_INVALID; 3514 switch (conn->address_type){ 3515 case BD_ADDR_TYPE_LE_PUBLIC: 3516 case BD_ADDR_TYPE_LE_RANDOM: 3517 return GAP_CONNECTION_LE; 3518 case BD_ADDR_TYPE_SCO: 3519 return GAP_CONNECTION_SCO; 3520 case BD_ADDR_TYPE_CLASSIC: 3521 return GAP_CONNECTION_ACL; 3522 default: 3523 return GAP_CONNECTION_INVALID; 3524 } 3525 } 3526 3527 #ifdef ENABLE_BLE 3528 3529 /** 3530 * @brief Auto Connection Establishment - Start Connecting to device 3531 * @param address_typ 3532 * @param address 3533 * @returns 0 if ok 3534 */ 3535 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3536 // check capacity 3537 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3538 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3539 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3540 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3541 entry->address_type = address_type; 3542 memcpy(entry->address, address, 6); 3543 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3544 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3545 hci_run(); 3546 return 0; 3547 } 3548 3549 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3550 btstack_linked_list_iterator_t it; 3551 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3552 while (btstack_linked_list_iterator_has_next(&it)){ 3553 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3554 if (entry->address_type != address_type) continue; 3555 if (memcmp(entry->address, address, 6) != 0) continue; 3556 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3557 // remove from controller if already present 3558 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3559 continue; 3560 } 3561 // direclty remove entry from whitelist 3562 btstack_linked_list_iterator_remove(&it); 3563 btstack_memory_whitelist_entry_free(entry); 3564 } 3565 } 3566 3567 /** 3568 * @brief Auto Connection Establishment - Stop Connecting to device 3569 * @param address_typ 3570 * @param address 3571 * @returns 0 if ok 3572 */ 3573 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3574 hci_remove_from_whitelist(address_type, address); 3575 hci_run(); 3576 return 0; 3577 } 3578 3579 /** 3580 * @brief Auto Connection Establishment - Stop everything 3581 * @note Convenience function to stop all active auto connection attempts 3582 */ 3583 void gap_auto_connection_stop_all(void){ 3584 btstack_linked_list_iterator_t it; 3585 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3586 while (btstack_linked_list_iterator_has_next(&it)){ 3587 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3588 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3589 // remove from controller if already present 3590 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3591 continue; 3592 } 3593 // directly remove entry from whitelist 3594 btstack_linked_list_iterator_remove(&it); 3595 btstack_memory_whitelist_entry_free(entry); 3596 } 3597 hci_run(); 3598 } 3599 3600 #endif 3601 3602 /** 3603 * @brief Set Extended Inquiry Response data 3604 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3605 * @note has to be done before stack starts up 3606 */ 3607 void gap_set_extended_inquiry_response(const uint8_t * data){ 3608 hci_stack->eir_data = data; 3609 } 3610 3611 /** 3612 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3613 * @param inquriy_mode see bluetooth_defines.h 3614 */ 3615 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3616 hci_stack->inquiry_mode = mode; 3617 } 3618 3619 /** 3620 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3621 */ 3622 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3623 hci_stack->sco_voice_setting = voice_setting; 3624 } 3625 3626 /** 3627 * @brief Get SCO Voice Setting 3628 * @return current voice setting 3629 */ 3630 uint16_t hci_get_sco_voice_setting(void){ 3631 return hci_stack->sco_voice_setting; 3632 } 3633 3634 /** @brief Get SCO packet length for current SCO Voice setting 3635 * @note Using SCO packets of the exact length is required for USB transfer 3636 * @return Length of SCO packets in bytes (not audio frames) 3637 */ 3638 int hci_get_sco_packet_length(void){ 3639 // see Core Spec for H2 USB Transfer. 3640 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3641 return 27; 3642 } 3643 3644 /** 3645 * @brief Set callback for Bluetooth Hardware Error 3646 */ 3647 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3648 hci_stack->hardware_error_callback = fn; 3649 } 3650 3651 /** 3652 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3653 * @note Can be used to select chipset driver dynamically during startup 3654 */ 3655 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3656 hci_stack->local_version_information_callback = fn; 3657 } 3658 3659 void hci_disconnect_all(void){ 3660 btstack_linked_list_iterator_t it; 3661 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3662 while (btstack_linked_list_iterator_has_next(&it)){ 3663 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3664 if (con->state == SENT_DISCONNECT) continue; 3665 con->state = SEND_DISCONNECT; 3666 } 3667 hci_run(); 3668 } 3669