1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef HAVE_EMBEDDED_TICK 49 #include "btstack_run_loop_embedded.h" 50 #endif 51 52 #ifdef HAVE_PLATFORM_IPHONE_OS 53 #include "../port/ios/src/btstack_control_iphone.h" 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #endif 59 60 #include <stdarg.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "gap.h" 70 #include "hci.h" 71 #include "hci_cmd.h" 72 #include "hci_dump.h" 73 74 75 #define HCI_CONNECTION_TIMEOUT_MS 10000 76 #define HCI_RESET_RESEND_TIMEOUT_MS 200 77 78 // prototypes 79 #ifdef ENABLE_CLASSIC 80 static void hci_update_scan_enable(void); 81 static void hci_emit_discoverable_enabled(uint8_t enabled); 82 static int hci_local_ssp_activated(void); 83 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 84 static void hci_notify_if_sco_can_send_now(void); 85 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 86 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 87 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 88 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 89 static void hci_connection_timestamp(hci_connection_t *connection); 90 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 91 #endif 92 static int hci_power_control_on(void); 93 static void hci_power_control_off(void); 94 static void hci_state_reset(void); 95 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 96 static void hci_emit_nr_connections_changed(void); 97 static void hci_emit_hci_open_failed(void); 98 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 99 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 100 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 101 static void hci_run(void); 102 static int hci_is_le_connection(hci_connection_t * connection); 103 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 104 105 #ifdef ENABLE_BLE 106 // called from test/ble_client/advertising_data_parser.c 107 void le_handle_advertisement_report(uint8_t *packet, int size); 108 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 109 #endif 110 111 // the STACK is here 112 #ifndef HAVE_MALLOC 113 static hci_stack_t hci_stack_static; 114 #endif 115 static hci_stack_t * hci_stack = NULL; 116 117 // test helper 118 static uint8_t disable_l2cap_timeouts = 0; 119 120 /** 121 * create connection for given address 122 * 123 * @return connection OR NULL, if no memory left 124 */ 125 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 126 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 127 hci_connection_t * conn = btstack_memory_hci_connection_get(); 128 if (!conn) return NULL; 129 memset(conn, 0, sizeof(hci_connection_t)); 130 bd_addr_copy(conn->address, addr); 131 conn->address_type = addr_type; 132 conn->con_handle = 0xffff; 133 conn->authentication_flags = AUTH_FLAGS_NONE; 134 conn->bonding_flags = 0; 135 conn->requested_security_level = LEVEL_0; 136 #ifdef ENABLE_CLASSIC 137 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 138 btstack_run_loop_set_timer_context(&conn->timeout, conn); 139 hci_connection_timestamp(conn); 140 #endif 141 conn->acl_recombination_length = 0; 142 conn->acl_recombination_pos = 0; 143 conn->num_acl_packets_sent = 0; 144 conn->num_sco_packets_sent = 0; 145 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 146 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 147 return conn; 148 } 149 150 151 /** 152 * get le connection parameter range 153 * 154 * @return le connection parameter range struct 155 */ 156 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 157 *range = hci_stack->le_connection_parameter_range; 158 } 159 160 /** 161 * set le connection parameter range 162 * 163 */ 164 165 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 166 hci_stack->le_connection_parameter_range = *range; 167 } 168 169 /** 170 * get hci connections iterator 171 * 172 * @return hci connections iterator 173 */ 174 175 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 176 btstack_linked_list_iterator_init(it, &hci_stack->connections); 177 } 178 179 /** 180 * get connection for a given handle 181 * 182 * @return connection OR NULL, if not found 183 */ 184 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 185 btstack_linked_list_iterator_t it; 186 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 187 while (btstack_linked_list_iterator_has_next(&it)){ 188 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 189 if ( item->con_handle == con_handle ) { 190 return item; 191 } 192 } 193 return NULL; 194 } 195 196 /** 197 * get connection for given address 198 * 199 * @return connection OR NULL, if not found 200 */ 201 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 202 btstack_linked_list_iterator_t it; 203 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 204 while (btstack_linked_list_iterator_has_next(&it)){ 205 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 206 if (connection->address_type != addr_type) continue; 207 if (memcmp(addr, connection->address, 6) != 0) continue; 208 return connection; 209 } 210 return NULL; 211 } 212 213 214 #ifdef ENABLE_CLASSIC 215 216 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 217 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 218 #ifdef HAVE_EMBEDDED_TICK 219 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 220 // connections might be timed out 221 hci_emit_l2cap_check_timeout(connection); 222 } 223 #else 224 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 225 // connections might be timed out 226 hci_emit_l2cap_check_timeout(connection); 227 } 228 #endif 229 } 230 231 static void hci_connection_timestamp(hci_connection_t *connection){ 232 #ifdef HAVE_EMBEDDED_TICK 233 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 234 #else 235 connection->timestamp = btstack_run_loop_get_time_ms(); 236 #endif 237 } 238 239 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 240 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 241 } 242 243 244 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 245 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 246 } 247 248 /** 249 * add authentication flags and reset timer 250 * @note: assumes classic connection 251 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 252 */ 253 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 254 bd_addr_t addr; 255 reverse_bd_addr(bd_addr, addr); 256 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 257 if (conn) { 258 connectionSetAuthenticationFlags(conn, flags); 259 hci_connection_timestamp(conn); 260 } 261 } 262 263 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 264 hci_connection_t * conn = hci_connection_for_handle(handle); 265 if (!conn) return 0; 266 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 267 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 268 return 0; 269 } 270 271 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 272 if (!hci_stack->link_key_db) return; 273 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 274 hci_stack->link_key_db->delete_link_key(addr); 275 } 276 277 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 278 if (!hci_stack->link_key_db) return; 279 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 280 hci_stack->link_key_db->put_link_key(addr, link_key, type); 281 } 282 #endif 283 284 static int hci_is_le_connection(hci_connection_t * connection){ 285 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 286 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 287 } 288 289 /** 290 * count connections 291 */ 292 static int nr_hci_connections(void){ 293 int count = 0; 294 btstack_linked_item_t *it; 295 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 296 return count; 297 } 298 299 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 300 301 unsigned int num_packets_sent_classic = 0; 302 unsigned int num_packets_sent_le = 0; 303 304 btstack_linked_item_t *it; 305 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 306 hci_connection_t * connection = (hci_connection_t *) it; 307 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 308 num_packets_sent_classic += connection->num_acl_packets_sent; 309 } else { 310 num_packets_sent_le += connection->num_acl_packets_sent; 311 } 312 } 313 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 314 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 315 int free_slots_le = 0; 316 317 if (free_slots_classic < 0){ 318 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 319 return 0; 320 } 321 322 if (hci_stack->le_acl_packets_total_num){ 323 // if we have LE slots, they are used 324 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 325 if (free_slots_le < 0){ 326 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 327 return 0; 328 } 329 } else { 330 // otherwise, classic slots are used for LE, too 331 free_slots_classic -= num_packets_sent_le; 332 if (free_slots_classic < 0){ 333 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 334 return 0; 335 } 336 } 337 338 switch (address_type){ 339 case BD_ADDR_TYPE_UNKNOWN: 340 log_error("hci_number_free_acl_slots: unknown address type"); 341 return 0; 342 343 case BD_ADDR_TYPE_CLASSIC: 344 return free_slots_classic; 345 346 default: 347 if (hci_stack->le_acl_packets_total_num){ 348 return free_slots_le; 349 } 350 return free_slots_classic; 351 } 352 } 353 354 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 355 // get connection type 356 hci_connection_t * connection = hci_connection_for_handle(con_handle); 357 if (!connection){ 358 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 359 return 0; 360 } 361 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 362 } 363 364 #ifdef ENABLE_CLASSIC 365 static int hci_number_free_sco_slots(void){ 366 unsigned int num_sco_packets_sent = 0; 367 btstack_linked_item_t *it; 368 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 369 hci_connection_t * connection = (hci_connection_t *) it; 370 num_sco_packets_sent += connection->num_sco_packets_sent; 371 } 372 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 373 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 374 return 0; 375 } 376 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 377 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 378 } 379 #endif 380 381 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 382 int hci_can_send_command_packet_now(void){ 383 if (hci_stack->hci_packet_buffer_reserved) return 0; 384 385 // check for async hci transport implementations 386 if (hci_stack->hci_transport->can_send_packet_now){ 387 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 388 return 0; 389 } 390 } 391 392 return hci_stack->num_cmd_packets > 0; 393 } 394 395 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 396 // check for async hci transport implementations 397 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 398 return hci_stack->hci_transport->can_send_packet_now(packet_type); 399 } 400 401 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 402 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 403 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 404 } 405 406 int hci_can_send_acl_le_packet_now(void){ 407 if (hci_stack->hci_packet_buffer_reserved) return 0; 408 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 409 } 410 411 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 412 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 413 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 414 } 415 416 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 417 if (hci_stack->hci_packet_buffer_reserved) return 0; 418 return hci_can_send_prepared_acl_packet_now(con_handle); 419 } 420 421 #ifdef ENABLE_CLASSIC 422 int hci_can_send_acl_classic_packet_now(void){ 423 if (hci_stack->hci_packet_buffer_reserved) return 0; 424 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 425 } 426 427 int hci_can_send_prepared_sco_packet_now(void){ 428 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 429 if (!hci_stack->synchronous_flow_control_enabled) return 1; 430 return hci_number_free_sco_slots() > 0; 431 } 432 433 int hci_can_send_sco_packet_now(void){ 434 if (hci_stack->hci_packet_buffer_reserved) return 0; 435 return hci_can_send_prepared_sco_packet_now(); 436 } 437 438 void hci_request_sco_can_send_now_event(void){ 439 hci_stack->sco_waiting_for_can_send_now = 1; 440 hci_notify_if_sco_can_send_now(); 441 } 442 #endif 443 444 // used for internal checks in l2cap.c 445 int hci_is_packet_buffer_reserved(void){ 446 return hci_stack->hci_packet_buffer_reserved; 447 } 448 449 // reserves outgoing packet buffer. @returns 1 if successful 450 int hci_reserve_packet_buffer(void){ 451 if (hci_stack->hci_packet_buffer_reserved) { 452 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 453 return 0; 454 } 455 hci_stack->hci_packet_buffer_reserved = 1; 456 return 1; 457 } 458 459 void hci_release_packet_buffer(void){ 460 hci_stack->hci_packet_buffer_reserved = 0; 461 } 462 463 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 464 static int hci_transport_synchronous(void){ 465 return hci_stack->hci_transport->can_send_packet_now == NULL; 466 } 467 468 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 469 470 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 471 472 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 473 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 474 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 475 max_acl_data_packet_length = hci_stack->le_data_packets_length; 476 } 477 478 // testing: reduce buffer to minimum 479 // max_acl_data_packet_length = 52; 480 481 log_debug("hci_send_acl_packet_fragments entered"); 482 483 int err; 484 // multiple packets could be send on a synchronous HCI transport 485 while (1){ 486 487 log_debug("hci_send_acl_packet_fragments loop entered"); 488 489 // get current data 490 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 491 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 492 int more_fragments = 0; 493 494 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 495 if (current_acl_data_packet_length > max_acl_data_packet_length){ 496 more_fragments = 1; 497 current_acl_data_packet_length = max_acl_data_packet_length; 498 } 499 500 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 501 if (acl_header_pos > 0){ 502 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 503 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 504 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 505 } 506 507 // update header len 508 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 509 510 // count packet 511 connection->num_acl_packets_sent++; 512 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 513 514 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 515 if (more_fragments){ 516 // update start of next fragment to send 517 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 518 } else { 519 // done 520 hci_stack->acl_fragmentation_pos = 0; 521 hci_stack->acl_fragmentation_total_size = 0; 522 } 523 524 // send packet 525 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 526 const int size = current_acl_data_packet_length + 4; 527 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 528 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 529 530 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 531 532 // done yet? 533 if (!more_fragments) break; 534 535 // can send more? 536 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 537 } 538 539 log_debug("hci_send_acl_packet_fragments loop over"); 540 541 // release buffer now for synchronous transport 542 if (hci_transport_synchronous()){ 543 hci_release_packet_buffer(); 544 // notify upper stack that it might be possible to send again 545 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 546 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 547 } 548 549 return err; 550 } 551 552 // pre: caller has reserved the packet buffer 553 int hci_send_acl_packet_buffer(int size){ 554 555 // log_info("hci_send_acl_packet_buffer size %u", size); 556 557 if (!hci_stack->hci_packet_buffer_reserved) { 558 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 559 return 0; 560 } 561 562 uint8_t * packet = hci_stack->hci_packet_buffer; 563 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 564 565 // check for free places on Bluetooth module 566 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 567 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 568 hci_release_packet_buffer(); 569 return BTSTACK_ACL_BUFFERS_FULL; 570 } 571 572 hci_connection_t *connection = hci_connection_for_handle( con_handle); 573 if (!connection) { 574 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 575 hci_release_packet_buffer(); 576 return 0; 577 } 578 579 #ifdef ENABLE_CLASSIC 580 hci_connection_timestamp(connection); 581 #endif 582 583 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 584 585 // setup data 586 hci_stack->acl_fragmentation_total_size = size; 587 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 588 589 return hci_send_acl_packet_fragments(connection); 590 } 591 592 #ifdef ENABLE_CLASSIC 593 // pre: caller has reserved the packet buffer 594 int hci_send_sco_packet_buffer(int size){ 595 596 // log_info("hci_send_acl_packet_buffer size %u", size); 597 598 if (!hci_stack->hci_packet_buffer_reserved) { 599 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 600 return 0; 601 } 602 603 uint8_t * packet = hci_stack->hci_packet_buffer; 604 605 // skip checks in loopback mode 606 if (!hci_stack->loopback_mode){ 607 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 608 609 // check for free places on Bluetooth module 610 if (!hci_can_send_prepared_sco_packet_now()) { 611 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 612 hci_release_packet_buffer(); 613 return BTSTACK_ACL_BUFFERS_FULL; 614 } 615 616 // track send packet in connection struct 617 hci_connection_t *connection = hci_connection_for_handle( con_handle); 618 if (!connection) { 619 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 620 hci_release_packet_buffer(); 621 return 0; 622 } 623 connection->num_sco_packets_sent++; 624 } 625 626 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 627 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 628 629 if (hci_transport_synchronous()){ 630 hci_release_packet_buffer(); 631 // notify upper stack that it might be possible to send again 632 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 633 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 634 } 635 636 return err; 637 } 638 #endif 639 640 static void acl_handler(uint8_t *packet, int size){ 641 642 // log_info("acl_handler: size %u", size); 643 644 // get info 645 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 646 hci_connection_t *conn = hci_connection_for_handle(con_handle); 647 uint8_t acl_flags = READ_ACL_FLAGS(packet); 648 uint16_t acl_length = READ_ACL_LENGTH(packet); 649 650 // ignore non-registered handle 651 if (!conn){ 652 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 653 return; 654 } 655 656 // assert packet is complete 657 if (acl_length + 4 != size){ 658 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 659 return; 660 } 661 662 #ifdef ENABLE_CLASSIC 663 // update idle timestamp 664 hci_connection_timestamp(conn); 665 #endif 666 667 // handle different packet types 668 switch (acl_flags & 0x03) { 669 670 case 0x01: // continuation fragment 671 672 // sanity checks 673 if (conn->acl_recombination_pos == 0) { 674 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 675 return; 676 } 677 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 678 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 679 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 680 conn->acl_recombination_pos = 0; 681 return; 682 } 683 684 // append fragment payload (header already stored) 685 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 686 conn->acl_recombination_pos += acl_length; 687 688 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 689 // conn->acl_recombination_pos, conn->acl_recombination_length); 690 691 // forward complete L2CAP packet if complete. 692 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 693 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 694 // reset recombination buffer 695 conn->acl_recombination_length = 0; 696 conn->acl_recombination_pos = 0; 697 } 698 break; 699 700 case 0x02: { // first fragment 701 702 // sanity check 703 if (conn->acl_recombination_pos) { 704 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 705 conn->acl_recombination_pos = 0; 706 } 707 708 // peek into L2CAP packet! 709 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 710 711 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 712 713 // compare fragment size to L2CAP packet size 714 if (acl_length >= l2cap_length + 4){ 715 // forward fragment as L2CAP packet 716 hci_emit_acl_packet(packet, acl_length + 4); 717 } else { 718 719 if (acl_length > HCI_ACL_BUFFER_SIZE){ 720 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 721 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 722 return; 723 } 724 725 // store first fragment and tweak acl length for complete package 726 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 727 conn->acl_recombination_pos = acl_length + 4; 728 conn->acl_recombination_length = l2cap_length; 729 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 730 } 731 break; 732 733 } 734 default: 735 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 736 return; 737 } 738 739 // execute main loop 740 hci_run(); 741 } 742 743 static void hci_shutdown_connection(hci_connection_t *conn){ 744 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 745 746 btstack_run_loop_remove_timer(&conn->timeout); 747 748 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 749 btstack_memory_hci_connection_free( conn ); 750 751 // now it's gone 752 hci_emit_nr_connections_changed(); 753 } 754 755 #ifdef ENABLE_CLASSIC 756 757 static const uint16_t packet_type_sizes[] = { 758 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 759 HCI_ACL_DH1_SIZE, 0, 0, 0, 760 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 761 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 762 }; 763 static const uint8_t packet_type_feature_requirement_bit[] = { 764 0, // 3 slot packets 765 1, // 5 slot packets 766 25, // EDR 2 mpbs 767 26, // EDR 3 mbps 768 39, // 3 slot EDR packts 769 40, // 5 slot EDR packet 770 }; 771 static const uint16_t packet_type_feature_packet_mask[] = { 772 0x0f00, // 3 slot packets 773 0xf000, // 5 slot packets 774 0x1102, // EDR 2 mpbs 775 0x2204, // EDR 3 mbps 776 0x0300, // 3 slot EDR packts 777 0x3000, // 5 slot EDR packet 778 }; 779 780 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 781 // enable packet types based on size 782 uint16_t packet_types = 0; 783 unsigned int i; 784 for (i=0;i<16;i++){ 785 if (packet_type_sizes[i] == 0) continue; 786 if (packet_type_sizes[i] <= buffer_size){ 787 packet_types |= 1 << i; 788 } 789 } 790 // disable packet types due to missing local supported features 791 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 792 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 793 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 794 if (feature_set) continue; 795 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 796 packet_types &= ~packet_type_feature_packet_mask[i]; 797 } 798 // flip bits for "may not be used" 799 packet_types ^= 0x3306; 800 return packet_types; 801 } 802 803 uint16_t hci_usable_acl_packet_types(void){ 804 return hci_stack->packet_types; 805 } 806 #endif 807 808 uint8_t* hci_get_outgoing_packet_buffer(void){ 809 // hci packet buffer is >= acl data packet length 810 return hci_stack->hci_packet_buffer; 811 } 812 813 uint16_t hci_max_acl_data_packet_length(void){ 814 return hci_stack->acl_data_packet_length; 815 } 816 817 int hci_extended_sco_link_supported(void){ 818 // No. 31, byte 3, bit 7 819 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 820 } 821 822 int hci_non_flushable_packet_boundary_flag_supported(void){ 823 // No. 54, byte 6, bit 6 824 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 825 } 826 827 static int gap_ssp_supported(void){ 828 // No. 51, byte 6, bit 3 829 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 830 } 831 832 static int hci_classic_supported(void){ 833 #ifdef ENABLE_CLASSIC 834 // No. 37, byte 4, bit 5, = No BR/EDR Support 835 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 836 #else 837 return 0; 838 #endif 839 } 840 841 static int hci_le_supported(void){ 842 #ifdef ENABLE_BLE 843 // No. 37, byte 4, bit 6 = LE Supported (Controller) 844 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 845 #else 846 return 0; 847 #endif 848 } 849 850 // get addr type and address used in advertisement packets 851 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 852 *addr_type = hci_stack->adv_addr_type; 853 if (hci_stack->adv_addr_type){ 854 memcpy(addr, hci_stack->adv_address, 6); 855 } else { 856 memcpy(addr, hci_stack->local_bd_addr, 6); 857 } 858 } 859 860 #ifdef ENABLE_BLE 861 void le_handle_advertisement_report(uint8_t *packet, int size){ 862 int offset = 3; 863 int num_reports = packet[offset]; 864 offset += 1; 865 866 int i; 867 // log_info("HCI: handle adv report with num reports: %d", num_reports); 868 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 869 for (i=0; i<num_reports;i++){ 870 uint8_t data_length = packet[offset + 8]; 871 uint8_t event_size = 10 + data_length; 872 int pos = 0; 873 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 874 event[pos++] = event_size; 875 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 876 offset += 8; 877 pos += 8; 878 event[pos++] = packet[offset + 1 + data_length]; // rssi 879 event[pos++] = packet[offset++]; //data_length; 880 memcpy(&event[pos], &packet[offset], data_length); 881 pos += data_length; 882 offset += data_length + 1; // rssi 883 hci_emit_event(event, pos, 1); 884 } 885 } 886 #endif 887 888 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 889 if (!hci_stack->config) return 0; 890 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 891 // Limit baud rate for Broadcom chipsets to 3 mbps 892 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 893 baud_rate = 3000000; 894 } 895 return baud_rate; 896 } 897 898 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 899 switch (hci_stack->substate){ 900 case HCI_INIT_W4_SEND_RESET: 901 log_info("Resend HCI Reset"); 902 hci_stack->substate = HCI_INIT_SEND_RESET; 903 hci_stack->num_cmd_packets = 1; 904 hci_run(); 905 break; 906 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 907 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 908 if (hci_stack->hci_transport->reset_link){ 909 hci_stack->hci_transport->reset_link(); 910 } 911 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 912 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 913 log_info("Resend HCI Reset - CSR Warm Boot"); 914 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 915 hci_stack->num_cmd_packets = 1; 916 hci_run(); 917 break; 918 case HCI_INIT_W4_SEND_BAUD_CHANGE: 919 if (hci_stack->hci_transport->set_baudrate){ 920 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 921 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 922 hci_stack->hci_transport->set_baudrate(baud_rate); 923 } 924 // For CSR, HCI Reset is sent on new baud rate 925 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 926 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 927 hci_run(); 928 } 929 break; 930 default: 931 break; 932 } 933 } 934 935 static void hci_initializing_next_state(void){ 936 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 937 } 938 939 // assumption: hci_can_send_command_packet_now() == true 940 static void hci_initializing_run(void){ 941 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 942 switch (hci_stack->substate){ 943 case HCI_INIT_SEND_RESET: 944 hci_state_reset(); 945 946 #ifndef HAVE_PLATFORM_IPHONE_OS 947 // prepare reset if command complete not received in 100ms 948 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 949 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 950 btstack_run_loop_add_timer(&hci_stack->timeout); 951 #endif 952 // send command 953 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 954 hci_send_cmd(&hci_reset); 955 break; 956 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 957 hci_send_cmd(&hci_read_local_version_information); 958 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 959 break; 960 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 961 hci_state_reset(); 962 // prepare reset if command complete not received in 100ms 963 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 964 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 965 btstack_run_loop_add_timer(&hci_stack->timeout); 966 // send command 967 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 968 hci_send_cmd(&hci_reset); 969 break; 970 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 971 hci_state_reset(); 972 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 973 hci_send_cmd(&hci_reset); 974 break; 975 case HCI_INIT_SEND_BAUD_CHANGE: { 976 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 977 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 978 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 979 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 980 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 981 // STLC25000D: baudrate change happens within 0.5 s after command was send, 982 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 983 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 984 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 985 btstack_run_loop_add_timer(&hci_stack->timeout); 986 } 987 break; 988 } 989 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 990 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 991 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 992 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 993 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 994 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 995 break; 996 } 997 case HCI_INIT_CUSTOM_INIT: 998 // Custom initialization 999 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1000 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1001 if (valid_cmd){ 1002 int size = 3 + hci_stack->hci_packet_buffer[2]; 1003 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1004 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1005 switch (valid_cmd) { 1006 case 1: 1007 default: 1008 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1009 break; 1010 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1011 log_info("CSR Warm Boot"); 1012 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1013 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1014 btstack_run_loop_add_timer(&hci_stack->timeout); 1015 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1016 && hci_stack->config 1017 && hci_stack->chipset 1018 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1019 && hci_stack->hci_transport->set_baudrate 1020 && hci_transport_uart_get_main_baud_rate()){ 1021 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1022 } else { 1023 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1024 } 1025 break; 1026 } 1027 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1028 break; 1029 } 1030 log_info("Init script done"); 1031 1032 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1033 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1034 int need_baud_change = hci_stack->config 1035 && hci_stack->chipset 1036 && hci_stack->chipset->set_baudrate_command 1037 && hci_stack->hci_transport->set_baudrate 1038 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1039 if (need_baud_change) { 1040 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1041 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1042 hci_stack->hci_transport->set_baudrate(baud_rate); 1043 } 1044 } 1045 } 1046 // otherwise continue 1047 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1048 hci_send_cmd(&hci_read_local_supported_commands); 1049 break; 1050 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1051 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1052 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1053 hci_send_cmd(&hci_read_local_supported_commands); 1054 break; 1055 case HCI_INIT_SET_BD_ADDR: 1056 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1057 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1058 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1059 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1060 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1061 break; 1062 case HCI_INIT_READ_BD_ADDR: 1063 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1064 hci_send_cmd(&hci_read_bd_addr); 1065 break; 1066 case HCI_INIT_READ_BUFFER_SIZE: 1067 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1068 hci_send_cmd(&hci_read_buffer_size); 1069 break; 1070 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1071 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1072 hci_send_cmd(&hci_read_local_supported_features); 1073 break; 1074 case HCI_INIT_SET_EVENT_MASK: 1075 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1076 if (hci_le_supported()){ 1077 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1078 } else { 1079 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1080 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1081 } 1082 break; 1083 #ifdef ENABLE_CLASSIC 1084 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1085 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1086 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1087 break; 1088 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1089 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1090 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1091 break; 1092 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1093 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1094 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1095 break; 1096 case HCI_INIT_WRITE_LOCAL_NAME: 1097 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1098 if (hci_stack->local_name){ 1099 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1100 } else { 1101 char local_name[8+17+1]; 1102 // BTstack 11:22:33:44:55:66 1103 memcpy(local_name, "BTstack ", 8); 1104 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1105 local_name[8+17] = '\0'; 1106 log_info("---> Name %s", local_name); 1107 hci_send_cmd(&hci_write_local_name, local_name); 1108 } 1109 break; 1110 case HCI_INIT_WRITE_EIR_DATA: 1111 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1112 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1113 break; 1114 case HCI_INIT_WRITE_INQUIRY_MODE: 1115 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1116 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1117 break; 1118 case HCI_INIT_WRITE_SCAN_ENABLE: 1119 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1120 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1121 break; 1122 // only sent if ENABLE_SCO_OVER_HCI is defined 1123 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1124 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1125 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1126 break; 1127 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1128 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1129 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1130 break; 1131 #endif 1132 #ifdef ENABLE_BLE 1133 // LE INIT 1134 case HCI_INIT_LE_READ_BUFFER_SIZE: 1135 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1136 hci_send_cmd(&hci_le_read_buffer_size); 1137 break; 1138 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1139 // LE Supported Host = 1, Simultaneous Host = 0 1140 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1141 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1142 break; 1143 case HCI_INIT_READ_WHITE_LIST_SIZE: 1144 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1145 hci_send_cmd(&hci_le_read_white_list_size); 1146 break; 1147 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1148 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1149 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1150 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1151 break; 1152 #endif 1153 default: 1154 return; 1155 } 1156 } 1157 1158 static void hci_init_done(void){ 1159 // done. tell the app 1160 log_info("hci_init_done -> HCI_STATE_WORKING"); 1161 hci_stack->state = HCI_STATE_WORKING; 1162 hci_emit_state(); 1163 hci_run(); 1164 } 1165 1166 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1167 uint8_t command_completed = 0; 1168 1169 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1170 uint16_t opcode = little_endian_read_16(packet,3); 1171 if (opcode == hci_stack->last_cmd_opcode){ 1172 command_completed = 1; 1173 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1174 } else { 1175 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1176 } 1177 } 1178 1179 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1180 uint8_t status = packet[2]; 1181 uint16_t opcode = little_endian_read_16(packet,4); 1182 if (opcode == hci_stack->last_cmd_opcode){ 1183 if (status){ 1184 command_completed = 1; 1185 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1186 } else { 1187 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1188 } 1189 } else { 1190 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1191 } 1192 } 1193 1194 // Vendor == CSR 1195 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1196 // TODO: track actual command 1197 command_completed = 1; 1198 } 1199 1200 // Vendor == Toshiba 1201 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1202 // TODO: track actual command 1203 command_completed = 1; 1204 } 1205 1206 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1207 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1208 // 1209 // HCI Reset 1210 // Timeout 100 ms 1211 // HCI Reset 1212 // Command Complete Reset 1213 // HCI Read Local Version Information 1214 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1215 // hang... 1216 // 1217 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1218 if (!command_completed 1219 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1220 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1221 1222 uint16_t opcode = little_endian_read_16(packet,3); 1223 if (opcode == hci_reset.opcode){ 1224 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1225 return; 1226 } 1227 } 1228 1229 // CSR & H5 1230 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1231 if (!command_completed 1232 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1233 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1234 1235 uint16_t opcode = little_endian_read_16(packet,3); 1236 if (opcode == hci_reset.opcode){ 1237 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1238 return; 1239 } 1240 } 1241 1242 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1243 // fix: Correct substate and behave as command below 1244 if (command_completed){ 1245 switch (hci_stack->substate){ 1246 case HCI_INIT_SEND_RESET: 1247 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1248 break; 1249 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1250 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1251 break; 1252 default: 1253 break; 1254 } 1255 } 1256 1257 1258 if (!command_completed) return; 1259 1260 int need_baud_change = hci_stack->config 1261 && hci_stack->chipset 1262 && hci_stack->chipset->set_baudrate_command 1263 && hci_stack->hci_transport->set_baudrate 1264 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1265 1266 int need_addr_change = hci_stack->custom_bd_addr_set 1267 && hci_stack->chipset 1268 && hci_stack->chipset->set_bd_addr_command; 1269 1270 switch(hci_stack->substate){ 1271 case HCI_INIT_SEND_RESET: 1272 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1273 // fix: just correct substate and behave as command below 1274 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1275 btstack_run_loop_remove_timer(&hci_stack->timeout); 1276 break; 1277 case HCI_INIT_W4_SEND_RESET: 1278 btstack_run_loop_remove_timer(&hci_stack->timeout); 1279 break; 1280 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1281 log_info("Received local version info, need baud change %d", need_baud_change); 1282 if (need_baud_change){ 1283 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1284 return; 1285 } 1286 // skip baud change 1287 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1288 return; 1289 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1290 // for STLC2500D, baud rate change already happened. 1291 // for others, baud rate gets changed now 1292 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1293 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1294 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1295 hci_stack->hci_transport->set_baudrate(baud_rate); 1296 } 1297 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1298 return; 1299 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1300 btstack_run_loop_remove_timer(&hci_stack->timeout); 1301 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1302 return; 1303 case HCI_INIT_W4_CUSTOM_INIT: 1304 // repeat custom init 1305 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1306 return; 1307 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1308 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1309 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1310 return; 1311 } 1312 if (need_addr_change){ 1313 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1314 return; 1315 } 1316 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1317 return; 1318 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1319 if (need_baud_change){ 1320 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1321 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1322 hci_stack->hci_transport->set_baudrate(baud_rate); 1323 } 1324 if (need_addr_change){ 1325 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1326 return; 1327 } 1328 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1329 return; 1330 case HCI_INIT_W4_SET_BD_ADDR: 1331 // for STLC2500D, bd addr change only gets active after sending reset command 1332 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1333 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1334 return; 1335 } 1336 // skipping st warm boot 1337 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1338 return; 1339 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1340 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1341 return; 1342 case HCI_INIT_W4_READ_BD_ADDR: 1343 // only read buffer size if supported 1344 if (hci_stack->local_supported_commands[0] & 0x01) { 1345 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1346 return; 1347 } 1348 // skipping read buffer size 1349 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1350 return; 1351 case HCI_INIT_W4_SET_EVENT_MASK: 1352 // skip Classic init commands for LE only chipsets 1353 if (!hci_classic_supported()){ 1354 if (hci_le_supported()){ 1355 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1356 return; 1357 } else { 1358 log_error("Neither BR/EDR nor LE supported"); 1359 hci_init_done(); 1360 return; 1361 } 1362 } 1363 if (!gap_ssp_supported()){ 1364 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1365 return; 1366 } 1367 break; 1368 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1369 // skip write le host if not supported (e.g. on LE only EM9301) 1370 if (hci_stack->local_supported_commands[0] & 0x02) break; 1371 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1372 return; 1373 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1374 // skip write eir data if no eir data set 1375 if (hci_stack->eir_data) break; 1376 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1377 return; 1378 1379 #ifdef ENABLE_SCO_OVER_HCI 1380 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1381 // skip write synchronous flow control if not supported 1382 if (hci_stack->local_supported_commands[0] & 0x04) break; 1383 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1384 // explicit fall through to reduce repetitions 1385 1386 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1387 // skip write default erroneous data reporting if not supported 1388 if (hci_stack->local_supported_commands[0] & 0x08) break; 1389 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1390 // explicit fall through to reduce repetitions 1391 1392 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1393 if (!hci_le_supported()){ 1394 // SKIP LE init for Classic only configuration 1395 hci_init_done(); 1396 return; 1397 } 1398 break; 1399 #else 1400 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1401 if (!hci_le_supported()){ 1402 // SKIP LE init for Classic only configuration 1403 hci_init_done(); 1404 return; 1405 } 1406 #endif 1407 break; 1408 // Response to command before init done state -> init done 1409 case (HCI_INIT_DONE-1): 1410 hci_init_done(); 1411 return; 1412 1413 default: 1414 break; 1415 } 1416 hci_initializing_next_state(); 1417 } 1418 1419 static void event_handler(uint8_t *packet, int size){ 1420 1421 uint16_t event_length = packet[1]; 1422 1423 // assert packet is complete 1424 if (size != event_length + 2){ 1425 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1426 return; 1427 } 1428 1429 bd_addr_t addr; 1430 bd_addr_type_t addr_type; 1431 uint8_t link_type; 1432 hci_con_handle_t handle; 1433 hci_connection_t * conn; 1434 int i; 1435 1436 // warnings 1437 (void) link_type; 1438 1439 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1440 1441 switch (hci_event_packet_get_type(packet)) { 1442 1443 case HCI_EVENT_COMMAND_COMPLETE: 1444 // get num cmd packets 1445 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1446 hci_stack->num_cmd_packets = packet[2]; 1447 1448 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1449 // from offset 5 1450 // status 1451 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1452 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1453 hci_stack->sco_data_packet_length = packet[8]; 1454 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1455 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1456 1457 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1458 // determine usable ACL payload size 1459 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1460 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1461 } 1462 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1463 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1464 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1465 } 1466 } 1467 #ifdef ENABLE_BLE 1468 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1469 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1470 hci_stack->le_acl_packets_total_num = packet[8]; 1471 // determine usable ACL payload size 1472 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1473 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1474 } 1475 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1476 } 1477 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1478 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1479 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1480 } 1481 #endif 1482 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1483 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1484 hci_stack->local_bd_addr); 1485 log_info("Local Address, Status: 0x%02x: Addr: %s", 1486 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1487 #ifdef ENABLE_CLASSIC 1488 if (hci_stack->link_key_db){ 1489 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1490 } 1491 #endif 1492 } 1493 #ifdef ENABLE_CLASSIC 1494 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1495 hci_emit_discoverable_enabled(hci_stack->discoverable); 1496 } 1497 #endif 1498 1499 // Note: HCI init checks 1500 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1501 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1502 1503 #ifdef ENABLE_CLASSIC 1504 // determine usable ACL packet types based on host buffer size and supported features 1505 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1506 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1507 #endif 1508 // Classic/LE 1509 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1510 } 1511 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1512 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1513 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1514 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1515 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1516 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1517 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1518 // notify app 1519 if (hci_stack->local_version_information_callback){ 1520 hci_stack->local_version_information_callback(packet); 1521 } 1522 } 1523 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1524 hci_stack->local_supported_commands[0] = 1525 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1526 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1527 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1528 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1529 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1530 } 1531 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1532 if (packet[5] == 0){ 1533 hci_stack->synchronous_flow_control_enabled = 1; 1534 } 1535 } 1536 break; 1537 1538 case HCI_EVENT_COMMAND_STATUS: 1539 // get num cmd packets 1540 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1541 hci_stack->num_cmd_packets = packet[3]; 1542 break; 1543 1544 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1545 int offset = 3; 1546 for (i=0; i<packet[2];i++){ 1547 handle = little_endian_read_16(packet, offset); 1548 offset += 2; 1549 uint16_t num_packets = little_endian_read_16(packet, offset); 1550 offset += 2; 1551 1552 conn = hci_connection_for_handle(handle); 1553 if (!conn){ 1554 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1555 continue; 1556 } 1557 1558 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1559 #ifdef ENABLE_CLASSIC 1560 if (conn->num_sco_packets_sent >= num_packets){ 1561 conn->num_sco_packets_sent -= num_packets; 1562 } else { 1563 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1564 conn->num_sco_packets_sent = 0; 1565 } 1566 hci_notify_if_sco_can_send_now(); 1567 #endif 1568 } else { 1569 if (conn->num_acl_packets_sent >= num_packets){ 1570 conn->num_acl_packets_sent -= num_packets; 1571 } else { 1572 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1573 conn->num_acl_packets_sent = 0; 1574 } 1575 } 1576 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1577 } 1578 break; 1579 } 1580 1581 #ifdef ENABLE_CLASSIC 1582 case HCI_EVENT_CONNECTION_REQUEST: 1583 reverse_bd_addr(&packet[2], addr); 1584 // TODO: eval COD 8-10 1585 link_type = packet[11]; 1586 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1587 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1588 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1589 if (!conn) { 1590 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1591 } 1592 if (!conn) { 1593 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1594 hci_stack->decline_reason = 0x0d; 1595 bd_addr_copy(hci_stack->decline_addr, addr); 1596 break; 1597 } 1598 conn->role = HCI_ROLE_SLAVE; 1599 conn->state = RECEIVED_CONNECTION_REQUEST; 1600 // store info about eSCO 1601 if (link_type == 0x02){ 1602 conn->remote_supported_feature_eSCO = 1; 1603 } 1604 hci_run(); 1605 break; 1606 1607 case HCI_EVENT_CONNECTION_COMPLETE: 1608 // Connection management 1609 reverse_bd_addr(&packet[5], addr); 1610 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1611 addr_type = BD_ADDR_TYPE_CLASSIC; 1612 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1613 if (conn) { 1614 if (!packet[2]){ 1615 conn->state = OPEN; 1616 conn->con_handle = little_endian_read_16(packet, 3); 1617 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1618 1619 // restart timer 1620 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1621 btstack_run_loop_add_timer(&conn->timeout); 1622 1623 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1624 1625 hci_emit_nr_connections_changed(); 1626 } else { 1627 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1628 uint8_t status = packet[2]; 1629 bd_addr_t bd_address; 1630 memcpy(&bd_address, conn->address, 6); 1631 1632 // connection failed, remove entry 1633 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1634 btstack_memory_hci_connection_free( conn ); 1635 1636 // notify client if dedicated bonding 1637 if (notify_dedicated_bonding_failed){ 1638 log_info("hci notify_dedicated_bonding_failed"); 1639 hci_emit_dedicated_bonding_result(bd_address, status); 1640 } 1641 1642 // if authentication error, also delete link key 1643 if (packet[2] == 0x05) { 1644 gap_drop_link_key_for_bd_addr(addr); 1645 } 1646 } 1647 } 1648 break; 1649 1650 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1651 reverse_bd_addr(&packet[5], addr); 1652 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1653 if (packet[2]){ 1654 // connection failed 1655 break; 1656 } 1657 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1658 if (!conn) { 1659 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1660 } 1661 if (!conn) { 1662 break; 1663 } 1664 conn->state = OPEN; 1665 conn->con_handle = little_endian_read_16(packet, 3); 1666 break; 1667 1668 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1669 handle = little_endian_read_16(packet, 3); 1670 conn = hci_connection_for_handle(handle); 1671 if (!conn) break; 1672 if (!packet[2]){ 1673 uint8_t * features = &packet[5]; 1674 if (features[6] & (1 << 3)){ 1675 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1676 } 1677 if (features[3] & (1<<7)){ 1678 conn->remote_supported_feature_eSCO = 1; 1679 } 1680 } 1681 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1682 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1683 if (conn->bonding_flags & BONDING_DEDICATED){ 1684 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1685 } 1686 break; 1687 1688 case HCI_EVENT_LINK_KEY_REQUEST: 1689 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1690 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1691 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1692 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1693 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1694 hci_run(); 1695 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1696 return; 1697 1698 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1699 reverse_bd_addr(&packet[2], addr); 1700 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1701 if (!conn) break; 1702 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1703 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1704 // Change Connection Encryption keeps link key type 1705 if (link_key_type != CHANGED_COMBINATION_KEY){ 1706 conn->link_key_type = link_key_type; 1707 } 1708 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1709 // still forward event to allow dismiss of pairing dialog 1710 break; 1711 } 1712 1713 case HCI_EVENT_PIN_CODE_REQUEST: 1714 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1715 // non-bondable mode: pin code negative reply will be sent 1716 if (!hci_stack->bondable){ 1717 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1718 hci_run(); 1719 return; 1720 } 1721 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1722 if (!hci_stack->link_key_db) break; 1723 hci_event_pin_code_request_get_bd_addr(packet, addr); 1724 hci_stack->link_key_db->delete_link_key(addr); 1725 break; 1726 1727 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1728 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1729 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1730 break; 1731 1732 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1733 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1734 if (!hci_stack->ssp_auto_accept) break; 1735 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1736 break; 1737 1738 case HCI_EVENT_USER_PASSKEY_REQUEST: 1739 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1740 if (!hci_stack->ssp_auto_accept) break; 1741 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1742 break; 1743 #endif 1744 1745 case HCI_EVENT_ENCRYPTION_CHANGE: 1746 handle = little_endian_read_16(packet, 3); 1747 conn = hci_connection_for_handle(handle); 1748 if (!conn) break; 1749 if (packet[2] == 0) { 1750 if (packet[5]){ 1751 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1752 } else { 1753 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1754 } 1755 } 1756 #ifdef ENABLE_CLASSIC 1757 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1758 #endif 1759 break; 1760 1761 #ifdef ENABLE_CLASSIC 1762 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1763 handle = little_endian_read_16(packet, 3); 1764 conn = hci_connection_for_handle(handle); 1765 if (!conn) break; 1766 1767 // dedicated bonding: send result and disconnect 1768 if (conn->bonding_flags & BONDING_DEDICATED){ 1769 conn->bonding_flags &= ~BONDING_DEDICATED; 1770 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1771 conn->bonding_status = packet[2]; 1772 break; 1773 } 1774 1775 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1776 // link key sufficient for requested security 1777 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1778 break; 1779 } 1780 // not enough 1781 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1782 break; 1783 #endif 1784 1785 // HCI_EVENT_DISCONNECTION_COMPLETE 1786 // has been split, to first notify stack before shutting connection down 1787 // see end of function, too. 1788 case HCI_EVENT_DISCONNECTION_COMPLETE: 1789 if (packet[2]) break; // status != 0 1790 handle = little_endian_read_16(packet, 3); 1791 // drop outgoing ACL fragments if it is for closed connection 1792 if (hci_stack->acl_fragmentation_total_size > 0) { 1793 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1794 log_info("hci: drop fragmented ACL data for closed connection"); 1795 hci_stack->acl_fragmentation_total_size = 0; 1796 hci_stack->acl_fragmentation_pos = 0; 1797 } 1798 } 1799 1800 // re-enable advertisements for le connections if active 1801 conn = hci_connection_for_handle(handle); 1802 if (!conn) break; 1803 #ifdef ENABLE_BLE 1804 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1805 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1806 } 1807 #endif 1808 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1809 break; 1810 1811 case HCI_EVENT_HARDWARE_ERROR: 1812 log_error("Hardware Error: 0x%02x", packet[2]); 1813 if (hci_stack->hardware_error_callback){ 1814 (*hci_stack->hardware_error_callback)(packet[2]); 1815 } else { 1816 // if no special requests, just reboot stack 1817 hci_power_control_off(); 1818 hci_power_control_on(); 1819 } 1820 break; 1821 1822 case HCI_EVENT_ROLE_CHANGE: 1823 if (packet[2]) break; // status != 0 1824 handle = little_endian_read_16(packet, 3); 1825 conn = hci_connection_for_handle(handle); 1826 if (!conn) break; // no conn 1827 conn->role = packet[9]; 1828 break; 1829 1830 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1831 // release packet buffer only for asynchronous transport and if there are not further fragements 1832 if (hci_transport_synchronous()) { 1833 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1834 return; // instead of break: to avoid re-entering hci_run() 1835 } 1836 if (hci_stack->acl_fragmentation_total_size) break; 1837 hci_release_packet_buffer(); 1838 1839 // L2CAP receives this event via the hci_emit_event below 1840 1841 #ifdef ENABLE_CLASSIC 1842 // For SCO, we do the can_send_now_check here 1843 hci_notify_if_sco_can_send_now(); 1844 #endif 1845 break; 1846 1847 #ifdef ENABLE_CLASSIC 1848 case HCI_EVENT_SCO_CAN_SEND_NOW: 1849 // For SCO, we do the can_send_now_check here 1850 hci_notify_if_sco_can_send_now(); 1851 return; 1852 #endif 1853 1854 #ifdef ENABLE_BLE 1855 case HCI_EVENT_LE_META: 1856 switch (packet[2]){ 1857 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1858 // log_info("advertising report received"); 1859 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1860 le_handle_advertisement_report(packet, size); 1861 break; 1862 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1863 // Connection management 1864 reverse_bd_addr(&packet[8], addr); 1865 addr_type = (bd_addr_type_t)packet[7]; 1866 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1867 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1868 // if auto-connect, remove from whitelist in both roles 1869 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1870 hci_remove_from_whitelist(addr_type, addr); 1871 } 1872 // handle error: error is reported only to the initiator -> outgoing connection 1873 if (packet[3]){ 1874 // outgoing connection establishment is done 1875 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1876 // remove entry 1877 if (conn){ 1878 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1879 btstack_memory_hci_connection_free( conn ); 1880 } 1881 break; 1882 } 1883 // on success, both hosts receive connection complete event 1884 if (packet[6] == HCI_ROLE_MASTER){ 1885 // if we're master, it was an outgoing connection and we're done with it 1886 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1887 } else { 1888 // if we're slave, it was an incoming connection, advertisements have stopped 1889 hci_stack->le_advertisements_active = 0; 1890 } 1891 // LE connections are auto-accepted, so just create a connection if there isn't one already 1892 if (!conn){ 1893 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1894 } 1895 // no memory, sorry. 1896 if (!conn){ 1897 break; 1898 } 1899 1900 conn->state = OPEN; 1901 conn->role = packet[6]; 1902 conn->con_handle = little_endian_read_16(packet, 4); 1903 1904 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1905 1906 // restart timer 1907 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1908 // btstack_run_loop_add_timer(&conn->timeout); 1909 1910 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1911 1912 hci_emit_nr_connections_changed(); 1913 break; 1914 1915 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1916 1917 default: 1918 break; 1919 } 1920 break; 1921 #endif 1922 default: 1923 break; 1924 } 1925 1926 // handle BT initialization 1927 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1928 hci_initializing_event_handler(packet, size); 1929 } 1930 1931 // help with BT sleep 1932 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1933 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1934 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1935 hci_initializing_next_state(); 1936 } 1937 1938 // notify upper stack 1939 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 1940 1941 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1942 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 1943 if (!packet[2]){ 1944 handle = little_endian_read_16(packet, 3); 1945 hci_connection_t * aConn = hci_connection_for_handle(handle); 1946 if (aConn) { 1947 uint8_t status = aConn->bonding_status; 1948 uint16_t flags = aConn->bonding_flags; 1949 bd_addr_t bd_address; 1950 memcpy(&bd_address, aConn->address, 6); 1951 hci_shutdown_connection(aConn); 1952 // connection struct is gone, don't access anymore 1953 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1954 hci_emit_dedicated_bonding_result(bd_address, status); 1955 } 1956 } 1957 } 1958 } 1959 1960 // execute main loop 1961 hci_run(); 1962 } 1963 1964 #ifdef ENABLE_CLASSIC 1965 static void sco_handler(uint8_t * packet, uint16_t size){ 1966 if (!hci_stack->sco_packet_handler) return; 1967 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 1968 } 1969 #endif 1970 1971 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1972 hci_dump_packet(packet_type, 1, packet, size); 1973 switch (packet_type) { 1974 case HCI_EVENT_PACKET: 1975 event_handler(packet, size); 1976 break; 1977 case HCI_ACL_DATA_PACKET: 1978 acl_handler(packet, size); 1979 break; 1980 #ifdef ENABLE_CLASSIC 1981 case HCI_SCO_DATA_PACKET: 1982 sco_handler(packet, size); 1983 break; 1984 #endif 1985 default: 1986 break; 1987 } 1988 } 1989 1990 /** 1991 * @brief Add event packet handler. 1992 */ 1993 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 1994 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 1995 } 1996 1997 1998 /** Register HCI packet handlers */ 1999 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2000 hci_stack->acl_packet_handler = handler; 2001 } 2002 2003 #ifdef ENABLE_CLASSIC 2004 /** 2005 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2006 */ 2007 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2008 hci_stack->sco_packet_handler = handler; 2009 } 2010 #endif 2011 2012 static void hci_state_reset(void){ 2013 // no connections yet 2014 hci_stack->connections = NULL; 2015 2016 // keep discoverable/connectable as this has been requested by the client(s) 2017 // hci_stack->discoverable = 0; 2018 // hci_stack->connectable = 0; 2019 // hci_stack->bondable = 1; 2020 2021 // buffer is free 2022 hci_stack->hci_packet_buffer_reserved = 0; 2023 2024 // no pending cmds 2025 hci_stack->decline_reason = 0; 2026 hci_stack->new_scan_enable_value = 0xff; 2027 2028 // LE 2029 hci_stack->adv_addr_type = 0; 2030 hci_stack->le_advertisements_random_address_set = 0; 2031 memset(hci_stack->adv_address, 0, 6); 2032 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2033 hci_stack->le_scan_type = 0xff; 2034 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2035 hci_stack->le_whitelist = 0; 2036 hci_stack->le_whitelist_capacity = 0; 2037 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2038 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2039 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2040 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2041 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2042 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2043 } 2044 2045 #ifdef ENABLE_CLASSIC 2046 /** 2047 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2048 */ 2049 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2050 // store and open remote device db 2051 hci_stack->link_key_db = link_key_db; 2052 if (hci_stack->link_key_db) { 2053 hci_stack->link_key_db->open(); 2054 } 2055 } 2056 #endif 2057 2058 void hci_init(const hci_transport_t *transport, const void *config){ 2059 2060 #ifdef HAVE_MALLOC 2061 if (!hci_stack) { 2062 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2063 } 2064 #else 2065 hci_stack = &hci_stack_static; 2066 #endif 2067 memset(hci_stack, 0, sizeof(hci_stack_t)); 2068 2069 // reference to use transport layer implementation 2070 hci_stack->hci_transport = transport; 2071 2072 // reference to used config 2073 hci_stack->config = config; 2074 2075 // setup pointer for outgoing packet buffer 2076 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2077 2078 // max acl payload size defined in config.h 2079 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2080 2081 // register packet handlers with transport 2082 transport->register_packet_handler(&packet_handler); 2083 2084 hci_stack->state = HCI_STATE_OFF; 2085 2086 // class of device 2087 hci_stack->class_of_device = 0x007a020c; // Smartphone 2088 2089 // bondable by default 2090 hci_stack->bondable = 1; 2091 2092 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2093 hci_stack->ssp_enable = 1; 2094 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2095 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2096 hci_stack->ssp_auto_accept = 1; 2097 2098 // voice setting - signed 8 bit pcm data with CVSD over the air 2099 hci_stack->sco_voice_setting = 0x40; 2100 2101 hci_state_reset(); 2102 } 2103 2104 /** 2105 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2106 */ 2107 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2108 hci_stack->chipset = chipset_driver; 2109 2110 // reset chipset driver - init is also called on power_up 2111 if (hci_stack->chipset && hci_stack->chipset->init){ 2112 hci_stack->chipset->init(hci_stack->config); 2113 } 2114 } 2115 2116 /** 2117 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2118 */ 2119 void hci_set_control(const btstack_control_t *hardware_control){ 2120 // references to used control implementation 2121 hci_stack->control = hardware_control; 2122 // init with transport config 2123 hardware_control->init(hci_stack->config); 2124 } 2125 2126 void hci_close(void){ 2127 // close remote device db 2128 if (hci_stack->link_key_db) { 2129 hci_stack->link_key_db->close(); 2130 } 2131 2132 btstack_linked_list_iterator_t lit; 2133 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2134 while (btstack_linked_list_iterator_has_next(&lit)){ 2135 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2136 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2137 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2138 hci_shutdown_connection(connection); 2139 } 2140 2141 hci_power_control(HCI_POWER_OFF); 2142 2143 #ifdef HAVE_MALLOC 2144 free(hci_stack); 2145 #endif 2146 hci_stack = NULL; 2147 } 2148 2149 #ifdef ENABLE_CLASSIC 2150 void gap_set_class_of_device(uint32_t class_of_device){ 2151 hci_stack->class_of_device = class_of_device; 2152 } 2153 #endif 2154 2155 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2156 void hci_set_bd_addr(bd_addr_t addr){ 2157 memcpy(hci_stack->custom_bd_addr, addr, 6); 2158 hci_stack->custom_bd_addr_set = 1; 2159 } 2160 2161 void hci_disable_l2cap_timeout_check(void){ 2162 disable_l2cap_timeouts = 1; 2163 } 2164 // State-Module-Driver overview 2165 // state module low-level 2166 // HCI_STATE_OFF off close 2167 // HCI_STATE_INITIALIZING, on open 2168 // HCI_STATE_WORKING, on open 2169 // HCI_STATE_HALTING, on open 2170 // HCI_STATE_SLEEPING, off/sleep close 2171 // HCI_STATE_FALLING_ASLEEP on open 2172 2173 static int hci_power_control_on(void){ 2174 2175 // power on 2176 int err = 0; 2177 if (hci_stack->control && hci_stack->control->on){ 2178 err = (*hci_stack->control->on)(); 2179 } 2180 if (err){ 2181 log_error( "POWER_ON failed"); 2182 hci_emit_hci_open_failed(); 2183 return err; 2184 } 2185 2186 // int chipset driver 2187 if (hci_stack->chipset && hci_stack->chipset->init){ 2188 hci_stack->chipset->init(hci_stack->config); 2189 } 2190 2191 // init transport 2192 if (hci_stack->hci_transport->init){ 2193 hci_stack->hci_transport->init(hci_stack->config); 2194 } 2195 2196 // open transport 2197 err = hci_stack->hci_transport->open(); 2198 if (err){ 2199 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2200 if (hci_stack->control && hci_stack->control->off){ 2201 (*hci_stack->control->off)(); 2202 } 2203 hci_emit_hci_open_failed(); 2204 return err; 2205 } 2206 return 0; 2207 } 2208 2209 static void hci_power_control_off(void){ 2210 2211 log_info("hci_power_control_off"); 2212 2213 // close low-level device 2214 hci_stack->hci_transport->close(); 2215 2216 log_info("hci_power_control_off - hci_transport closed"); 2217 2218 // power off 2219 if (hci_stack->control && hci_stack->control->off){ 2220 (*hci_stack->control->off)(); 2221 } 2222 2223 log_info("hci_power_control_off - control closed"); 2224 2225 hci_stack->state = HCI_STATE_OFF; 2226 } 2227 2228 static void hci_power_control_sleep(void){ 2229 2230 log_info("hci_power_control_sleep"); 2231 2232 #if 0 2233 // don't close serial port during sleep 2234 2235 // close low-level device 2236 hci_stack->hci_transport->close(hci_stack->config); 2237 #endif 2238 2239 // sleep mode 2240 if (hci_stack->control && hci_stack->control->sleep){ 2241 (*hci_stack->control->sleep)(); 2242 } 2243 2244 hci_stack->state = HCI_STATE_SLEEPING; 2245 } 2246 2247 static int hci_power_control_wake(void){ 2248 2249 log_info("hci_power_control_wake"); 2250 2251 // wake on 2252 if (hci_stack->control && hci_stack->control->wake){ 2253 (*hci_stack->control->wake)(); 2254 } 2255 2256 #if 0 2257 // open low-level device 2258 int err = hci_stack->hci_transport->open(hci_stack->config); 2259 if (err){ 2260 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2261 if (hci_stack->control && hci_stack->control->off){ 2262 (*hci_stack->control->off)(); 2263 } 2264 hci_emit_hci_open_failed(); 2265 return err; 2266 } 2267 #endif 2268 2269 return 0; 2270 } 2271 2272 static void hci_power_transition_to_initializing(void){ 2273 // set up state machine 2274 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2275 hci_stack->hci_packet_buffer_reserved = 0; 2276 hci_stack->state = HCI_STATE_INITIALIZING; 2277 hci_stack->substate = HCI_INIT_SEND_RESET; 2278 } 2279 2280 int hci_power_control(HCI_POWER_MODE power_mode){ 2281 2282 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2283 2284 int err = 0; 2285 switch (hci_stack->state){ 2286 2287 case HCI_STATE_OFF: 2288 switch (power_mode){ 2289 case HCI_POWER_ON: 2290 err = hci_power_control_on(); 2291 if (err) { 2292 log_error("hci_power_control_on() error %d", err); 2293 return err; 2294 } 2295 hci_power_transition_to_initializing(); 2296 break; 2297 case HCI_POWER_OFF: 2298 // do nothing 2299 break; 2300 case HCI_POWER_SLEEP: 2301 // do nothing (with SLEEP == OFF) 2302 break; 2303 } 2304 break; 2305 2306 case HCI_STATE_INITIALIZING: 2307 switch (power_mode){ 2308 case HCI_POWER_ON: 2309 // do nothing 2310 break; 2311 case HCI_POWER_OFF: 2312 // no connections yet, just turn it off 2313 hci_power_control_off(); 2314 break; 2315 case HCI_POWER_SLEEP: 2316 // no connections yet, just turn it off 2317 hci_power_control_sleep(); 2318 break; 2319 } 2320 break; 2321 2322 case HCI_STATE_WORKING: 2323 switch (power_mode){ 2324 case HCI_POWER_ON: 2325 // do nothing 2326 break; 2327 case HCI_POWER_OFF: 2328 // see hci_run 2329 hci_stack->state = HCI_STATE_HALTING; 2330 break; 2331 case HCI_POWER_SLEEP: 2332 // see hci_run 2333 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2334 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2335 break; 2336 } 2337 break; 2338 2339 case HCI_STATE_HALTING: 2340 switch (power_mode){ 2341 case HCI_POWER_ON: 2342 hci_power_transition_to_initializing(); 2343 break; 2344 case HCI_POWER_OFF: 2345 // do nothing 2346 break; 2347 case HCI_POWER_SLEEP: 2348 // see hci_run 2349 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2350 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2351 break; 2352 } 2353 break; 2354 2355 case HCI_STATE_FALLING_ASLEEP: 2356 switch (power_mode){ 2357 case HCI_POWER_ON: 2358 2359 #ifdef HAVE_PLATFORM_IPHONE_OS 2360 // nothing to do, if H4 supports power management 2361 if (btstack_control_iphone_power_management_enabled()){ 2362 hci_stack->state = HCI_STATE_INITIALIZING; 2363 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2364 break; 2365 } 2366 #endif 2367 hci_power_transition_to_initializing(); 2368 break; 2369 case HCI_POWER_OFF: 2370 // see hci_run 2371 hci_stack->state = HCI_STATE_HALTING; 2372 break; 2373 case HCI_POWER_SLEEP: 2374 // do nothing 2375 break; 2376 } 2377 break; 2378 2379 case HCI_STATE_SLEEPING: 2380 switch (power_mode){ 2381 case HCI_POWER_ON: 2382 2383 #ifdef HAVE_PLATFORM_IPHONE_OS 2384 // nothing to do, if H4 supports power management 2385 if (btstack_control_iphone_power_management_enabled()){ 2386 hci_stack->state = HCI_STATE_INITIALIZING; 2387 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2388 hci_update_scan_enable(); 2389 break; 2390 } 2391 #endif 2392 err = hci_power_control_wake(); 2393 if (err) return err; 2394 hci_power_transition_to_initializing(); 2395 break; 2396 case HCI_POWER_OFF: 2397 hci_stack->state = HCI_STATE_HALTING; 2398 break; 2399 case HCI_POWER_SLEEP: 2400 // do nothing 2401 break; 2402 } 2403 break; 2404 } 2405 2406 // create internal event 2407 hci_emit_state(); 2408 2409 // trigger next/first action 2410 hci_run(); 2411 2412 return 0; 2413 } 2414 2415 2416 #ifdef ENABLE_CLASSIC 2417 2418 static void hci_update_scan_enable(void){ 2419 // 2 = page scan, 1 = inq scan 2420 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2421 hci_run(); 2422 } 2423 2424 void gap_discoverable_control(uint8_t enable){ 2425 if (enable) enable = 1; // normalize argument 2426 2427 if (hci_stack->discoverable == enable){ 2428 hci_emit_discoverable_enabled(hci_stack->discoverable); 2429 return; 2430 } 2431 2432 hci_stack->discoverable = enable; 2433 hci_update_scan_enable(); 2434 } 2435 2436 void gap_connectable_control(uint8_t enable){ 2437 if (enable) enable = 1; // normalize argument 2438 2439 // don't emit event 2440 if (hci_stack->connectable == enable) return; 2441 2442 hci_stack->connectable = enable; 2443 hci_update_scan_enable(); 2444 } 2445 #endif 2446 2447 void gap_local_bd_addr(bd_addr_t address_buffer){ 2448 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2449 } 2450 2451 static void hci_run(void){ 2452 2453 // log_info("hci_run: entered"); 2454 btstack_linked_item_t * it; 2455 2456 // send continuation fragments first, as they block the prepared packet buffer 2457 if (hci_stack->acl_fragmentation_total_size > 0) { 2458 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2459 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2460 if (connection) { 2461 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2462 hci_send_acl_packet_fragments(connection); 2463 return; 2464 } 2465 } else { 2466 // connection gone -> discard further fragments 2467 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2468 hci_stack->acl_fragmentation_total_size = 0; 2469 hci_stack->acl_fragmentation_pos = 0; 2470 } 2471 } 2472 2473 if (!hci_can_send_command_packet_now()) return; 2474 2475 // global/non-connection oriented commands 2476 2477 #ifdef ENABLE_CLASSIC 2478 // decline incoming connections 2479 if (hci_stack->decline_reason){ 2480 uint8_t reason = hci_stack->decline_reason; 2481 hci_stack->decline_reason = 0; 2482 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2483 return; 2484 } 2485 2486 // send scan enable 2487 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2488 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2489 hci_stack->new_scan_enable_value = 0xff; 2490 return; 2491 } 2492 #endif 2493 2494 #ifdef ENABLE_BLE 2495 if (hci_stack->state == HCI_STATE_WORKING){ 2496 // handle le scan 2497 switch(hci_stack->le_scanning_state){ 2498 case LE_START_SCAN: 2499 hci_stack->le_scanning_state = LE_SCANNING; 2500 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2501 return; 2502 2503 case LE_STOP_SCAN: 2504 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2505 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2506 return; 2507 default: 2508 break; 2509 } 2510 if (hci_stack->le_scan_type != 0xff){ 2511 // defaults: active scanning, accept all advertisement packets 2512 int scan_type = hci_stack->le_scan_type; 2513 hci_stack->le_scan_type = 0xff; 2514 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); 2515 return; 2516 } 2517 // le advertisement control 2518 if (hci_stack->le_advertisements_todo){ 2519 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2520 } 2521 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2522 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2523 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2524 return; 2525 } 2526 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2527 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2528 hci_send_cmd(&hci_le_set_advertising_parameters, 2529 hci_stack->le_advertisements_interval_min, 2530 hci_stack->le_advertisements_interval_max, 2531 hci_stack->le_advertisements_type, 2532 hci_stack->le_advertisements_own_address_type, 2533 hci_stack->le_advertisements_direct_address_type, 2534 hci_stack->le_advertisements_direct_address, 2535 hci_stack->le_advertisements_channel_map, 2536 hci_stack->le_advertisements_filter_policy); 2537 return; 2538 } 2539 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2540 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2541 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2542 hci_stack->le_advertisements_data); 2543 return; 2544 } 2545 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2546 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2547 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2548 hci_stack->le_scan_response_data); 2549 return; 2550 } 2551 // Random address needs to be set before enabling advertisements 2552 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE) 2553 && (hci_stack->le_advertisements_own_address_type == 0 || hci_stack->le_advertisements_random_address_set)){ 2554 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2555 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2556 return; 2557 } 2558 2559 // 2560 // LE Whitelist Management 2561 // 2562 2563 // check if whitelist needs modification 2564 btstack_linked_list_iterator_t lit; 2565 int modification_pending = 0; 2566 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2567 while (btstack_linked_list_iterator_has_next(&lit)){ 2568 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2569 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2570 modification_pending = 1; 2571 break; 2572 } 2573 } 2574 2575 if (modification_pending){ 2576 // stop connnecting if modification pending 2577 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2578 hci_send_cmd(&hci_le_create_connection_cancel); 2579 return; 2580 } 2581 2582 // add/remove entries 2583 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2584 while (btstack_linked_list_iterator_has_next(&lit)){ 2585 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2586 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2587 entry->state = LE_WHITELIST_ON_CONTROLLER; 2588 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2589 return; 2590 2591 } 2592 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2593 bd_addr_t address; 2594 bd_addr_type_t address_type = entry->address_type; 2595 memcpy(address, entry->address, 6); 2596 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2597 btstack_memory_whitelist_entry_free(entry); 2598 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2599 return; 2600 } 2601 } 2602 } 2603 2604 // start connecting 2605 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2606 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2607 bd_addr_t null_addr; 2608 memset(null_addr, 0, 6); 2609 hci_send_cmd(&hci_le_create_connection, 2610 0x0060, // scan interval: 60 ms 2611 0x0030, // scan interval: 30 ms 2612 1, // use whitelist 2613 0, // peer address type 2614 null_addr, // peer bd addr 2615 hci_stack->adv_addr_type, // our addr type: 2616 0x0008, // conn interval min 2617 0x0018, // conn interval max 2618 0, // conn latency 2619 0x0048, // supervision timeout 2620 0x0001, // min ce length 2621 0x0001 // max ce length 2622 ); 2623 return; 2624 } 2625 } 2626 #endif 2627 2628 // send pending HCI commands 2629 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2630 hci_connection_t * connection = (hci_connection_t *) it; 2631 2632 switch(connection->state){ 2633 case SEND_CREATE_CONNECTION: 2634 switch(connection->address_type){ 2635 #ifdef ENABLE_CLASSIC 2636 case BD_ADDR_TYPE_CLASSIC: 2637 log_info("sending hci_create_connection"); 2638 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2639 break; 2640 #endif 2641 default: 2642 #ifdef ENABLE_BLE 2643 log_info("sending hci_le_create_connection"); 2644 hci_send_cmd(&hci_le_create_connection, 2645 0x0060, // scan interval: 60 ms 2646 0x0030, // scan interval: 30 ms 2647 0, // don't use whitelist 2648 connection->address_type, // peer address type 2649 connection->address, // peer bd addr 2650 hci_stack->adv_addr_type, // our addr type: 2651 0x0008, // conn interval min 2652 0x0018, // conn interval max 2653 0, // conn latency 2654 0x0048, // supervision timeout 2655 0x0001, // min ce length 2656 0x0001 // max ce length 2657 ); 2658 2659 connection->state = SENT_CREATE_CONNECTION; 2660 #endif 2661 break; 2662 } 2663 return; 2664 2665 #ifdef ENABLE_CLASSIC 2666 case RECEIVED_CONNECTION_REQUEST: 2667 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2668 connection->state = ACCEPTED_CONNECTION_REQUEST; 2669 connection->role = HCI_ROLE_SLAVE; 2670 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2671 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2672 } 2673 return; 2674 #endif 2675 2676 #ifdef ENABLE_BLE 2677 case SEND_CANCEL_CONNECTION: 2678 connection->state = SENT_CANCEL_CONNECTION; 2679 hci_send_cmd(&hci_le_create_connection_cancel); 2680 return; 2681 #endif 2682 case SEND_DISCONNECT: 2683 connection->state = SENT_DISCONNECT; 2684 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2685 return; 2686 2687 default: 2688 break; 2689 } 2690 2691 #ifdef ENABLE_CLASSIC 2692 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2693 log_info("responding to link key request"); 2694 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2695 link_key_t link_key; 2696 link_key_type_t link_key_type; 2697 if ( hci_stack->link_key_db 2698 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2699 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2700 connection->link_key_type = link_key_type; 2701 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2702 } else { 2703 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2704 } 2705 return; 2706 } 2707 2708 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2709 log_info("denying to pin request"); 2710 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2711 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2712 return; 2713 } 2714 2715 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2716 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2717 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2718 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2719 // tweak authentication requirements 2720 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2721 if (connection->bonding_flags & BONDING_DEDICATED){ 2722 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2723 } 2724 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2725 authreq |= 1; 2726 } 2727 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2728 } else { 2729 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2730 } 2731 return; 2732 } 2733 2734 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2735 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2736 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2737 return; 2738 } 2739 2740 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2741 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2742 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2743 return; 2744 } 2745 #endif 2746 2747 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2748 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2749 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2750 return; 2751 } 2752 2753 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2754 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2755 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2756 return; 2757 } 2758 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2759 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2760 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2761 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2762 return; 2763 } 2764 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2765 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2766 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2767 return; 2768 } 2769 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2770 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2771 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2772 return; 2773 } 2774 2775 #ifdef ENABLE_BLE 2776 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2777 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2778 2779 uint16_t connection_interval_min = connection->le_conn_interval_min; 2780 connection->le_conn_interval_min = 0; 2781 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2782 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2783 0x0000, 0xffff); 2784 } 2785 #endif 2786 } 2787 2788 hci_connection_t * connection; 2789 switch (hci_stack->state){ 2790 case HCI_STATE_INITIALIZING: 2791 hci_initializing_run(); 2792 break; 2793 2794 case HCI_STATE_HALTING: 2795 2796 log_info("HCI_STATE_HALTING"); 2797 2798 // free whitelist entries 2799 #ifdef ENABLE_BLE 2800 { 2801 btstack_linked_list_iterator_t lit; 2802 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2803 while (btstack_linked_list_iterator_has_next(&lit)){ 2804 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2805 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2806 btstack_memory_whitelist_entry_free(entry); 2807 } 2808 } 2809 #endif 2810 // close all open connections 2811 connection = (hci_connection_t *) hci_stack->connections; 2812 if (connection){ 2813 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2814 if (!hci_can_send_command_packet_now()) return; 2815 2816 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2817 2818 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2819 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2820 2821 // ... which would be ignored anyway as we shutdown (free) the connection now 2822 hci_shutdown_connection(connection); 2823 2824 // finally, send the disconnect command 2825 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2826 return; 2827 } 2828 log_info("HCI_STATE_HALTING, calling off"); 2829 2830 // switch mode 2831 hci_power_control_off(); 2832 2833 log_info("HCI_STATE_HALTING, emitting state"); 2834 hci_emit_state(); 2835 log_info("HCI_STATE_HALTING, done"); 2836 break; 2837 2838 case HCI_STATE_FALLING_ASLEEP: 2839 switch(hci_stack->substate) { 2840 case HCI_FALLING_ASLEEP_DISCONNECT: 2841 log_info("HCI_STATE_FALLING_ASLEEP"); 2842 // close all open connections 2843 connection = (hci_connection_t *) hci_stack->connections; 2844 2845 #ifdef HAVE_PLATFORM_IPHONE_OS 2846 // don't close connections, if H4 supports power management 2847 if (btstack_control_iphone_power_management_enabled()){ 2848 connection = NULL; 2849 } 2850 #endif 2851 if (connection){ 2852 2853 // send disconnect 2854 if (!hci_can_send_command_packet_now()) return; 2855 2856 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2857 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2858 2859 // send disconnected event right away - causes higher layer connections to get closed, too. 2860 hci_shutdown_connection(connection); 2861 return; 2862 } 2863 2864 if (hci_classic_supported()){ 2865 // disable page and inquiry scan 2866 if (!hci_can_send_command_packet_now()) return; 2867 2868 log_info("HCI_STATE_HALTING, disabling inq scans"); 2869 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2870 2871 // continue in next sub state 2872 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2873 break; 2874 } 2875 // no break - fall through for ble-only chips 2876 2877 case HCI_FALLING_ASLEEP_COMPLETE: 2878 log_info("HCI_STATE_HALTING, calling sleep"); 2879 #ifdef HAVE_PLATFORM_IPHONE_OS 2880 // don't actually go to sleep, if H4 supports power management 2881 if (btstack_control_iphone_power_management_enabled()){ 2882 // SLEEP MODE reached 2883 hci_stack->state = HCI_STATE_SLEEPING; 2884 hci_emit_state(); 2885 break; 2886 } 2887 #endif 2888 // switch mode 2889 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2890 hci_emit_state(); 2891 break; 2892 2893 default: 2894 break; 2895 } 2896 break; 2897 2898 default: 2899 break; 2900 } 2901 } 2902 2903 int hci_send_cmd_packet(uint8_t *packet, int size){ 2904 // house-keeping 2905 2906 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2907 hci_stack->loopback_mode = packet[3]; 2908 } 2909 2910 #ifdef ENABLE_CLASSIC 2911 bd_addr_t addr; 2912 hci_connection_t * conn; 2913 2914 // create_connection? 2915 if (IS_COMMAND(packet, hci_create_connection)){ 2916 reverse_bd_addr(&packet[3], addr); 2917 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2918 2919 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2920 if (!conn){ 2921 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2922 if (!conn){ 2923 // notify client that alloc failed 2924 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2925 return 0; // don't sent packet to controller 2926 } 2927 conn->state = SEND_CREATE_CONNECTION; 2928 } 2929 log_info("conn state %u", conn->state); 2930 switch (conn->state){ 2931 // if connection active exists 2932 case OPEN: 2933 // and OPEN, emit connection complete command, don't send to controller 2934 hci_emit_connection_complete(addr, conn->con_handle, 0); 2935 return 0; 2936 case SEND_CREATE_CONNECTION: 2937 // connection created by hci, e.g. dedicated bonding 2938 break; 2939 default: 2940 // otherwise, just ignore as it is already in the open process 2941 return 0; 2942 } 2943 conn->state = SENT_CREATE_CONNECTION; 2944 } 2945 2946 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2947 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2948 } 2949 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2950 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2951 } 2952 2953 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2954 if (hci_stack->link_key_db){ 2955 reverse_bd_addr(&packet[3], addr); 2956 hci_stack->link_key_db->delete_link_key(addr); 2957 } 2958 } 2959 2960 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2961 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2962 reverse_bd_addr(&packet[3], addr); 2963 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2964 if (conn){ 2965 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2966 } 2967 } 2968 2969 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2970 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2971 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2972 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2973 reverse_bd_addr(&packet[3], addr); 2974 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2975 if (conn){ 2976 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2977 } 2978 } 2979 #endif 2980 2981 #ifdef ENABLE_BLE 2982 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2983 hci_stack->adv_addr_type = packet[8]; 2984 } 2985 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2986 hci_stack->le_advertisements_random_address_set = 1; 2987 reverse_bd_addr(&packet[3], hci_stack->adv_address); 2988 } 2989 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2990 hci_stack->le_advertisements_active = packet[3]; 2991 } 2992 if (IS_COMMAND(packet, hci_le_create_connection)){ 2993 // white list used? 2994 uint8_t initiator_filter_policy = packet[7]; 2995 switch (initiator_filter_policy){ 2996 case 0: 2997 // whitelist not used 2998 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2999 break; 3000 case 1: 3001 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3002 break; 3003 default: 3004 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3005 break; 3006 } 3007 } 3008 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3009 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3010 } 3011 #endif 3012 3013 hci_stack->num_cmd_packets--; 3014 3015 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3016 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3017 3018 // release packet buffer for synchronous transport implementations 3019 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3020 hci_stack->hci_packet_buffer_reserved = 0; 3021 } 3022 3023 return err; 3024 } 3025 3026 // disconnect because of security block 3027 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3028 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3029 if (!connection) return; 3030 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3031 } 3032 3033 3034 // Configure Secure Simple Pairing 3035 3036 #ifdef ENABLE_CLASSIC 3037 3038 // enable will enable SSP during init 3039 void gap_ssp_set_enable(int enable){ 3040 hci_stack->ssp_enable = enable; 3041 } 3042 3043 static int hci_local_ssp_activated(void){ 3044 return gap_ssp_supported() && hci_stack->ssp_enable; 3045 } 3046 3047 // if set, BTstack will respond to io capability request using authentication requirement 3048 void gap_ssp_set_io_capability(int io_capability){ 3049 hci_stack->ssp_io_capability = io_capability; 3050 } 3051 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3052 hci_stack->ssp_authentication_requirement = authentication_requirement; 3053 } 3054 3055 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3056 void gap_ssp_set_auto_accept(int auto_accept){ 3057 hci_stack->ssp_auto_accept = auto_accept; 3058 } 3059 #endif 3060 3061 /** 3062 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3063 */ 3064 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3065 3066 if (!hci_can_send_command_packet_now()){ 3067 log_error("hci_send_cmd called but cannot send packet now"); 3068 return 0; 3069 } 3070 3071 // for HCI INITIALIZATION 3072 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3073 hci_stack->last_cmd_opcode = cmd->opcode; 3074 3075 hci_reserve_packet_buffer(); 3076 uint8_t * packet = hci_stack->hci_packet_buffer; 3077 3078 va_list argptr; 3079 va_start(argptr, cmd); 3080 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3081 va_end(argptr); 3082 3083 return hci_send_cmd_packet(packet, size); 3084 } 3085 3086 // Create various non-HCI events. 3087 // TODO: generalize, use table similar to hci_create_command 3088 3089 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3090 // dump packet 3091 if (dump) { 3092 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3093 } 3094 3095 // dispatch to all event handlers 3096 btstack_linked_list_iterator_t it; 3097 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3098 while (btstack_linked_list_iterator_has_next(&it)){ 3099 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3100 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3101 } 3102 } 3103 3104 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3105 if (!hci_stack->acl_packet_handler) return; 3106 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3107 } 3108 3109 #ifdef ENABLE_CLASSIC 3110 static void hci_notify_if_sco_can_send_now(void){ 3111 // notify SCO sender if waiting 3112 if (!hci_stack->sco_waiting_for_can_send_now) return; 3113 if (hci_can_send_sco_packet_now()){ 3114 hci_stack->sco_waiting_for_can_send_now = 0; 3115 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3116 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3117 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3118 } 3119 } 3120 #endif 3121 3122 void hci_emit_state(void){ 3123 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3124 uint8_t event[3]; 3125 event[0] = BTSTACK_EVENT_STATE; 3126 event[1] = sizeof(event) - 2; 3127 event[2] = hci_stack->state; 3128 hci_emit_event(event, sizeof(event), 1); 3129 } 3130 3131 #ifdef ENABLE_CLASSIC 3132 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3133 uint8_t event[13]; 3134 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3135 event[1] = sizeof(event) - 2; 3136 event[2] = status; 3137 little_endian_store_16(event, 3, con_handle); 3138 reverse_bd_addr(address, &event[5]); 3139 event[11] = 1; // ACL connection 3140 event[12] = 0; // encryption disabled 3141 hci_emit_event(event, sizeof(event), 1); 3142 } 3143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3144 if (disable_l2cap_timeouts) return; 3145 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3146 uint8_t event[4]; 3147 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3148 event[1] = sizeof(event) - 2; 3149 little_endian_store_16(event, 2, conn->con_handle); 3150 hci_emit_event(event, sizeof(event), 1); 3151 } 3152 #endif 3153 3154 #ifdef ENABLE_BLE 3155 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3156 uint8_t event[21]; 3157 event[0] = HCI_EVENT_LE_META; 3158 event[1] = sizeof(event) - 2; 3159 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3160 event[3] = status; 3161 little_endian_store_16(event, 4, con_handle); 3162 event[6] = 0; // TODO: role 3163 event[7] = address_type; 3164 reverse_bd_addr(address, &event[8]); 3165 little_endian_store_16(event, 14, 0); // interval 3166 little_endian_store_16(event, 16, 0); // latency 3167 little_endian_store_16(event, 18, 0); // supervision timeout 3168 event[20] = 0; // master clock accuracy 3169 hci_emit_event(event, sizeof(event), 1); 3170 } 3171 #endif 3172 3173 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3174 uint8_t event[6]; 3175 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3176 event[1] = sizeof(event) - 2; 3177 event[2] = 0; // status = OK 3178 little_endian_store_16(event, 3, con_handle); 3179 event[5] = reason; 3180 hci_emit_event(event, sizeof(event), 1); 3181 } 3182 3183 static void hci_emit_nr_connections_changed(void){ 3184 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3185 uint8_t event[3]; 3186 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3187 event[1] = sizeof(event) - 2; 3188 event[2] = nr_hci_connections(); 3189 hci_emit_event(event, sizeof(event), 1); 3190 } 3191 3192 static void hci_emit_hci_open_failed(void){ 3193 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3194 uint8_t event[2]; 3195 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3196 event[1] = sizeof(event) - 2; 3197 hci_emit_event(event, sizeof(event), 1); 3198 } 3199 3200 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3201 log_info("hci_emit_dedicated_bonding_result %u ", status); 3202 uint8_t event[9]; 3203 int pos = 0; 3204 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3205 event[pos++] = sizeof(event) - 2; 3206 event[pos++] = status; 3207 reverse_bd_addr(address, &event[pos]); 3208 hci_emit_event(event, sizeof(event), 1); 3209 } 3210 3211 3212 #ifdef ENABLE_CLASSIC 3213 3214 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3215 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3216 uint8_t event[5]; 3217 int pos = 0; 3218 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3219 event[pos++] = sizeof(event) - 2; 3220 little_endian_store_16(event, 2, con_handle); 3221 pos += 2; 3222 event[pos++] = level; 3223 hci_emit_event(event, sizeof(event), 1); 3224 } 3225 3226 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3227 if (!connection) return LEVEL_0; 3228 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3229 return gap_security_level_for_link_key_type(connection->link_key_type); 3230 } 3231 3232 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3233 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3234 uint8_t event[3]; 3235 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3236 event[1] = sizeof(event) - 2; 3237 event[2] = enabled; 3238 hci_emit_event(event, sizeof(event), 1); 3239 } 3240 3241 // query if remote side supports eSCO 3242 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3243 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3244 if (!connection) return 0; 3245 return connection->remote_supported_feature_eSCO; 3246 } 3247 3248 // query if remote side supports SSP 3249 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3250 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3251 if (!connection) return 0; 3252 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3253 } 3254 3255 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3256 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3257 } 3258 3259 // GAP API 3260 /** 3261 * @bbrief enable/disable bonding. default is enabled 3262 * @praram enabled 3263 */ 3264 void gap_set_bondable_mode(int enable){ 3265 hci_stack->bondable = enable ? 1 : 0; 3266 } 3267 /** 3268 * @brief Get bondable mode. 3269 * @return 1 if bondable 3270 */ 3271 int gap_get_bondable_mode(void){ 3272 return hci_stack->bondable; 3273 } 3274 3275 /** 3276 * @brief map link keys to security levels 3277 */ 3278 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3279 switch (link_key_type){ 3280 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3281 return LEVEL_4; 3282 case COMBINATION_KEY: 3283 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3284 return LEVEL_3; 3285 default: 3286 return LEVEL_2; 3287 } 3288 } 3289 3290 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3291 log_info("gap_mitm_protection_required_for_security_level %u", level); 3292 return level > LEVEL_2; 3293 } 3294 3295 /** 3296 * @brief get current security level 3297 */ 3298 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3299 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3300 if (!connection) return LEVEL_0; 3301 return gap_security_level_for_connection(connection); 3302 } 3303 3304 /** 3305 * @brief request connection to device to 3306 * @result GAP_AUTHENTICATION_RESULT 3307 */ 3308 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3309 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3310 if (!connection){ 3311 hci_emit_security_level(con_handle, LEVEL_0); 3312 return; 3313 } 3314 gap_security_level_t current_level = gap_security_level(con_handle); 3315 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3316 if (current_level >= requested_level){ 3317 hci_emit_security_level(con_handle, current_level); 3318 return; 3319 } 3320 3321 connection->requested_security_level = requested_level; 3322 3323 #if 0 3324 // sending encryption request without a link key results in an error. 3325 // TODO: figure out how to use it properly 3326 3327 // would enabling ecnryption suffice (>= LEVEL_2)? 3328 if (hci_stack->link_key_db){ 3329 link_key_type_t link_key_type; 3330 link_key_t link_key; 3331 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3332 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3333 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3334 return; 3335 } 3336 } 3337 } 3338 #endif 3339 3340 // try to authenticate connection 3341 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3342 hci_run(); 3343 } 3344 3345 /** 3346 * @brief start dedicated bonding with device. disconnect after bonding 3347 * @param device 3348 * @param request MITM protection 3349 * @result GAP_DEDICATED_BONDING_COMPLETE 3350 */ 3351 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3352 3353 // create connection state machine 3354 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3355 3356 if (!connection){ 3357 return BTSTACK_MEMORY_ALLOC_FAILED; 3358 } 3359 3360 // delete linkn key 3361 gap_drop_link_key_for_bd_addr(device); 3362 3363 // configure LEVEL_2/3, dedicated bonding 3364 connection->state = SEND_CREATE_CONNECTION; 3365 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3366 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3367 connection->bonding_flags = BONDING_DEDICATED; 3368 3369 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3370 3371 // handle: connnection failure (connection complete != ok) 3372 // handle: authentication failure 3373 // handle: disconnect on done 3374 3375 hci_run(); 3376 3377 return 0; 3378 } 3379 #endif 3380 3381 void gap_set_local_name(const char * local_name){ 3382 hci_stack->local_name = local_name; 3383 } 3384 3385 3386 #ifdef ENABLE_BLE 3387 3388 void gap_start_scan(void){ 3389 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3390 hci_stack->le_scanning_state = LE_START_SCAN; 3391 hci_run(); 3392 } 3393 3394 void gap_stop_scan(void){ 3395 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3396 hci_stack->le_scanning_state = LE_STOP_SCAN; 3397 hci_run(); 3398 } 3399 3400 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3401 hci_stack->le_scan_type = scan_type; 3402 hci_stack->le_scan_interval = scan_interval; 3403 hci_stack->le_scan_window = scan_window; 3404 hci_run(); 3405 } 3406 3407 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3408 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3409 if (!conn){ 3410 log_info("gap_connect: no connection exists yet, creating context"); 3411 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3412 if (!conn){ 3413 // notify client that alloc failed 3414 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3415 log_info("gap_connect: failed to alloc hci_connection_t"); 3416 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3417 } 3418 conn->state = SEND_CREATE_CONNECTION; 3419 log_info("gap_connect: send create connection next"); 3420 hci_run(); 3421 return 0; 3422 } 3423 3424 if (!hci_is_le_connection(conn) || 3425 conn->state == SEND_CREATE_CONNECTION || 3426 conn->state == SENT_CREATE_CONNECTION) { 3427 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3428 log_error("gap_connect: classic connection or connect is already being created"); 3429 return GATT_CLIENT_IN_WRONG_STATE; 3430 } 3431 3432 log_info("gap_connect: context exists with state %u", conn->state); 3433 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3434 hci_run(); 3435 return 0; 3436 } 3437 3438 // @assumption: only a single outgoing LE Connection exists 3439 static hci_connection_t * gap_get_outgoing_connection(void){ 3440 btstack_linked_item_t *it; 3441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3442 hci_connection_t * conn = (hci_connection_t *) it; 3443 if (!hci_is_le_connection(conn)) continue; 3444 switch (conn->state){ 3445 case SEND_CREATE_CONNECTION: 3446 case SENT_CREATE_CONNECTION: 3447 return conn; 3448 default: 3449 break; 3450 }; 3451 } 3452 return NULL; 3453 } 3454 3455 uint8_t gap_connect_cancel(void){ 3456 hci_connection_t * conn = gap_get_outgoing_connection(); 3457 if (!conn) return 0; 3458 switch (conn->state){ 3459 case SEND_CREATE_CONNECTION: 3460 // skip sending create connection and emit event instead 3461 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3462 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3463 btstack_memory_hci_connection_free( conn ); 3464 break; 3465 case SENT_CREATE_CONNECTION: 3466 // request to send cancel connection 3467 conn->state = SEND_CANCEL_CONNECTION; 3468 hci_run(); 3469 break; 3470 default: 3471 break; 3472 } 3473 return 0; 3474 } 3475 3476 /** 3477 * @brief Updates the connection parameters for a given LE connection 3478 * @param handle 3479 * @param conn_interval_min (unit: 1.25ms) 3480 * @param conn_interval_max (unit: 1.25ms) 3481 * @param conn_latency 3482 * @param supervision_timeout (unit: 10ms) 3483 * @returns 0 if ok 3484 */ 3485 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3486 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3487 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3488 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3489 connection->le_conn_interval_min = conn_interval_min; 3490 connection->le_conn_interval_max = conn_interval_max; 3491 connection->le_conn_latency = conn_latency; 3492 connection->le_supervision_timeout = supervision_timeout; 3493 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3494 hci_run(); 3495 return 0; 3496 } 3497 3498 /** 3499 * @brief Request an update of the connection parameter for a given LE connection 3500 * @param handle 3501 * @param conn_interval_min (unit: 1.25ms) 3502 * @param conn_interval_max (unit: 1.25ms) 3503 * @param conn_latency 3504 * @param supervision_timeout (unit: 10ms) 3505 * @returns 0 if ok 3506 */ 3507 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3508 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3509 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3510 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3511 connection->le_conn_interval_min = conn_interval_min; 3512 connection->le_conn_interval_max = conn_interval_max; 3513 connection->le_conn_latency = conn_latency; 3514 connection->le_supervision_timeout = supervision_timeout; 3515 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3516 hci_run(); 3517 return 0; 3518 } 3519 3520 static void gap_advertisments_changed(void){ 3521 // disable advertisements before updating adv, scan data, or adv params 3522 if (hci_stack->le_advertisements_active){ 3523 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3524 } 3525 hci_run(); 3526 } 3527 3528 /** 3529 * @brief Set Advertisement Data 3530 * @param advertising_data_length 3531 * @param advertising_data (max 31 octets) 3532 * @note data is not copied, pointer has to stay valid 3533 */ 3534 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3535 hci_stack->le_advertisements_data_len = advertising_data_length; 3536 hci_stack->le_advertisements_data = advertising_data; 3537 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3538 gap_advertisments_changed(); 3539 } 3540 3541 /** 3542 * @brief Set Scan Response Data 3543 * @param advertising_data_length 3544 * @param advertising_data (max 31 octets) 3545 * @note data is not copied, pointer has to stay valid 3546 */ 3547 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3548 hci_stack->le_scan_response_data_len = scan_response_data_length; 3549 hci_stack->le_scan_response_data = scan_response_data; 3550 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3551 gap_advertisments_changed(); 3552 } 3553 3554 /** 3555 * @brief Set Advertisement Parameters 3556 * @param adv_int_min 3557 * @param adv_int_max 3558 * @param adv_type 3559 * @param own_address_type 3560 * @param direct_address_type 3561 * @param direct_address 3562 * @param channel_map 3563 * @param filter_policy 3564 * 3565 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3566 */ 3567 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3568 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3569 uint8_t channel_map, uint8_t filter_policy) { 3570 3571 hci_stack->le_advertisements_interval_min = adv_int_min; 3572 hci_stack->le_advertisements_interval_max = adv_int_max; 3573 hci_stack->le_advertisements_type = adv_type; 3574 hci_stack->le_advertisements_own_address_type = own_address_type; 3575 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3576 hci_stack->le_advertisements_channel_map = channel_map; 3577 hci_stack->le_advertisements_filter_policy = filter_policy; 3578 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3579 3580 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3581 gap_advertisments_changed(); 3582 } 3583 3584 void hci_le_advertisements_set_own_address_type(uint8_t own_address_type){ 3585 hci_stack->le_advertisements_own_address_type = own_address_type; 3586 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3587 gap_advertisments_changed(); 3588 } 3589 3590 /** 3591 * @brief Enable/Disable Advertisements 3592 * @param enabled 3593 */ 3594 void gap_advertisements_enable(int enabled){ 3595 hci_stack->le_advertisements_enabled = enabled; 3596 if (enabled && !hci_stack->le_advertisements_active){ 3597 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3598 } 3599 if (!enabled && hci_stack->le_advertisements_active){ 3600 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3601 } 3602 hci_run(); 3603 } 3604 3605 #endif 3606 3607 uint8_t gap_disconnect(hci_con_handle_t handle){ 3608 hci_connection_t * conn = hci_connection_for_handle(handle); 3609 if (!conn){ 3610 hci_emit_disconnection_complete(handle, 0); 3611 return 0; 3612 } 3613 conn->state = SEND_DISCONNECT; 3614 hci_run(); 3615 return 0; 3616 } 3617 3618 /** 3619 * @brief Get connection type 3620 * @param con_handle 3621 * @result connection_type 3622 */ 3623 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3624 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3625 if (!conn) return GAP_CONNECTION_INVALID; 3626 switch (conn->address_type){ 3627 case BD_ADDR_TYPE_LE_PUBLIC: 3628 case BD_ADDR_TYPE_LE_RANDOM: 3629 return GAP_CONNECTION_LE; 3630 case BD_ADDR_TYPE_SCO: 3631 return GAP_CONNECTION_SCO; 3632 case BD_ADDR_TYPE_CLASSIC: 3633 return GAP_CONNECTION_ACL; 3634 default: 3635 return GAP_CONNECTION_INVALID; 3636 } 3637 } 3638 3639 #ifdef ENABLE_BLE 3640 3641 /** 3642 * @brief Auto Connection Establishment - Start Connecting to device 3643 * @param address_typ 3644 * @param address 3645 * @returns 0 if ok 3646 */ 3647 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3648 // check capacity 3649 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3650 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3651 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3652 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3653 entry->address_type = address_type; 3654 memcpy(entry->address, address, 6); 3655 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3656 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3657 hci_run(); 3658 return 0; 3659 } 3660 3661 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3662 btstack_linked_list_iterator_t it; 3663 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3664 while (btstack_linked_list_iterator_has_next(&it)){ 3665 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3666 if (entry->address_type != address_type) continue; 3667 if (memcmp(entry->address, address, 6) != 0) continue; 3668 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3669 // remove from controller if already present 3670 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3671 continue; 3672 } 3673 // direclty remove entry from whitelist 3674 btstack_linked_list_iterator_remove(&it); 3675 btstack_memory_whitelist_entry_free(entry); 3676 } 3677 } 3678 3679 /** 3680 * @brief Auto Connection Establishment - Stop Connecting to device 3681 * @param address_typ 3682 * @param address 3683 * @returns 0 if ok 3684 */ 3685 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3686 hci_remove_from_whitelist(address_type, address); 3687 hci_run(); 3688 return 0; 3689 } 3690 3691 /** 3692 * @brief Auto Connection Establishment - Stop everything 3693 * @note Convenience function to stop all active auto connection attempts 3694 */ 3695 void gap_auto_connection_stop_all(void){ 3696 btstack_linked_list_iterator_t it; 3697 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3698 while (btstack_linked_list_iterator_has_next(&it)){ 3699 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3700 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3701 // remove from controller if already present 3702 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3703 continue; 3704 } 3705 // directly remove entry from whitelist 3706 btstack_linked_list_iterator_remove(&it); 3707 btstack_memory_whitelist_entry_free(entry); 3708 } 3709 hci_run(); 3710 } 3711 3712 #endif 3713 3714 #ifdef ENABLE_CLASSIC 3715 /** 3716 * @brief Set Extended Inquiry Response data 3717 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3718 * @note has to be done before stack starts up 3719 */ 3720 void gap_set_extended_inquiry_response(const uint8_t * data){ 3721 hci_stack->eir_data = data; 3722 } 3723 3724 /** 3725 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3726 * @param inquriy_mode see bluetooth_defines.h 3727 */ 3728 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3729 hci_stack->inquiry_mode = mode; 3730 } 3731 3732 /** 3733 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3734 */ 3735 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3736 hci_stack->sco_voice_setting = voice_setting; 3737 } 3738 3739 /** 3740 * @brief Get SCO Voice Setting 3741 * @return current voice setting 3742 */ 3743 uint16_t hci_get_sco_voice_setting(void){ 3744 return hci_stack->sco_voice_setting; 3745 } 3746 3747 /** @brief Get SCO packet length for current SCO Voice setting 3748 * @note Using SCO packets of the exact length is required for USB transfer 3749 * @return Length of SCO packets in bytes (not audio frames) 3750 */ 3751 int hci_get_sco_packet_length(void){ 3752 // see Core Spec for H2 USB Transfer. 3753 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3754 return 27; 3755 } 3756 #endif 3757 3758 /** 3759 * @brief Set callback for Bluetooth Hardware Error 3760 */ 3761 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3762 hci_stack->hardware_error_callback = fn; 3763 } 3764 3765 /** 3766 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 3767 * @note Can be used to select chipset driver dynamically during startup 3768 */ 3769 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)){ 3770 hci_stack->local_version_information_callback = fn; 3771 } 3772 3773 void hci_disconnect_all(void){ 3774 btstack_linked_list_iterator_t it; 3775 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3776 while (btstack_linked_list_iterator_has_next(&it)){ 3777 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3778 if (con->state == SENT_DISCONNECT) continue; 3779 con->state = SEND_DISCONNECT; 3780 } 3781 hci_run(); 3782 } 3783 3784 uint16_t hci_get_manufacturer(void){ 3785 return hci_stack->manufacturer; 3786 } 3787