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 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // prototypes 113 #ifdef ENABLE_CLASSIC 114 static void hci_update_scan_enable(void); 115 static void hci_emit_discoverable_enabled(uint8_t enabled); 116 static int hci_local_ssp_activated(void); 117 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 118 static void hci_notify_if_sco_can_send_now(void); 119 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 120 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 121 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 122 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 123 static void hci_connection_timestamp(hci_connection_t *connection); 124 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 125 static void gap_inquiry_explode(uint8_t * packet); 126 #endif 127 128 static int hci_power_control_on(void); 129 static void hci_power_control_off(void); 130 static void hci_state_reset(void); 131 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 132 static void hci_emit_nr_connections_changed(void); 133 static void hci_emit_hci_open_failed(void); 134 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 135 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 136 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 137 static void hci_run(void); 138 static int hci_is_le_connection(hci_connection_t * connection); 139 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 140 141 #ifdef ENABLE_BLE 142 #ifdef ENABLE_LE_CENTRAL 143 // called from test/ble_client/advertising_data_parser.c 144 void le_handle_advertisement_report(uint8_t *packet, int size); 145 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 146 #endif 147 #endif 148 149 // the STACK is here 150 #ifndef HAVE_MALLOC 151 static hci_stack_t hci_stack_static; 152 #endif 153 static hci_stack_t * hci_stack = NULL; 154 155 #ifdef ENABLE_CLASSIC 156 // test helper 157 static uint8_t disable_l2cap_timeouts = 0; 158 #endif 159 160 /** 161 * create connection for given address 162 * 163 * @return connection OR NULL, if no memory left 164 */ 165 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 166 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 167 hci_connection_t * conn = btstack_memory_hci_connection_get(); 168 if (!conn) return NULL; 169 memset(conn, 0, sizeof(hci_connection_t)); 170 bd_addr_copy(conn->address, addr); 171 conn->address_type = addr_type; 172 conn->con_handle = 0xffff; 173 conn->authentication_flags = AUTH_FLAGS_NONE; 174 conn->bonding_flags = 0; 175 conn->requested_security_level = LEVEL_0; 176 #ifdef ENABLE_CLASSIC 177 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 178 btstack_run_loop_set_timer_context(&conn->timeout, conn); 179 hci_connection_timestamp(conn); 180 #endif 181 conn->acl_recombination_length = 0; 182 conn->acl_recombination_pos = 0; 183 conn->num_acl_packets_sent = 0; 184 conn->num_sco_packets_sent = 0; 185 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 186 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 187 return conn; 188 } 189 190 191 /** 192 * get le connection parameter range 193 * 194 * @return le connection parameter range struct 195 */ 196 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 197 *range = hci_stack->le_connection_parameter_range; 198 } 199 200 /** 201 * set le connection parameter range 202 * 203 */ 204 205 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 206 hci_stack->le_connection_parameter_range = *range; 207 } 208 209 /** 210 * get hci connections iterator 211 * 212 * @return hci connections iterator 213 */ 214 215 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 216 btstack_linked_list_iterator_init(it, &hci_stack->connections); 217 } 218 219 /** 220 * get connection for a given handle 221 * 222 * @return connection OR NULL, if not found 223 */ 224 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 225 btstack_linked_list_iterator_t it; 226 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 227 while (btstack_linked_list_iterator_has_next(&it)){ 228 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 229 if ( item->con_handle == con_handle ) { 230 return item; 231 } 232 } 233 return NULL; 234 } 235 236 /** 237 * get connection for given address 238 * 239 * @return connection OR NULL, if not found 240 */ 241 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 242 btstack_linked_list_iterator_t it; 243 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 244 while (btstack_linked_list_iterator_has_next(&it)){ 245 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 246 if (connection->address_type != addr_type) continue; 247 if (memcmp(addr, connection->address, 6) != 0) continue; 248 return connection; 249 } 250 return NULL; 251 } 252 253 254 #ifdef ENABLE_CLASSIC 255 256 #ifdef ENABLE_SCO_OVER_HCI 257 static int hci_number_sco_connections(void){ 258 int connections = 0; 259 btstack_linked_list_iterator_t it; 260 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 261 while (btstack_linked_list_iterator_has_next(&it)){ 262 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 263 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 264 connections++; 265 } 266 return connections; 267 } 268 #endif 269 270 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 271 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 272 #ifdef HAVE_EMBEDDED_TICK 273 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 274 // connections might be timed out 275 hci_emit_l2cap_check_timeout(connection); 276 } 277 #else 278 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 279 // connections might be timed out 280 hci_emit_l2cap_check_timeout(connection); 281 } 282 #endif 283 } 284 285 static void hci_connection_timestamp(hci_connection_t *connection){ 286 #ifdef HAVE_EMBEDDED_TICK 287 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 288 #else 289 connection->timestamp = btstack_run_loop_get_time_ms(); 290 #endif 291 } 292 293 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 294 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 295 } 296 297 298 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 299 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 300 } 301 302 /** 303 * add authentication flags and reset timer 304 * @note: assumes classic connection 305 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 306 */ 307 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 308 bd_addr_t addr; 309 reverse_bd_addr(bd_addr, addr); 310 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 311 if (conn) { 312 connectionSetAuthenticationFlags(conn, flags); 313 hci_connection_timestamp(conn); 314 } 315 } 316 317 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 318 hci_connection_t * conn = hci_connection_for_handle(handle); 319 if (!conn) return 0; 320 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 321 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 322 return 0; 323 } 324 325 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 326 if (!hci_stack->link_key_db) return; 327 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 328 hci_stack->link_key_db->delete_link_key(addr); 329 } 330 331 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 332 if (!hci_stack->link_key_db) return; 333 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 334 hci_stack->link_key_db->put_link_key(addr, link_key, type); 335 } 336 #endif 337 338 static int hci_is_le_connection(hci_connection_t * connection){ 339 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 340 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 341 } 342 343 /** 344 * count connections 345 */ 346 static int nr_hci_connections(void){ 347 int count = 0; 348 btstack_linked_item_t *it; 349 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 350 return count; 351 } 352 353 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 354 355 unsigned int num_packets_sent_classic = 0; 356 unsigned int num_packets_sent_le = 0; 357 358 btstack_linked_item_t *it; 359 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 360 hci_connection_t * connection = (hci_connection_t *) it; 361 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 362 num_packets_sent_classic += connection->num_acl_packets_sent; 363 } else { 364 num_packets_sent_le += connection->num_acl_packets_sent; 365 } 366 } 367 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 368 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 369 int free_slots_le = 0; 370 371 if (free_slots_classic < 0){ 372 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); 373 return 0; 374 } 375 376 if (hci_stack->le_acl_packets_total_num){ 377 // if we have LE slots, they are used 378 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 379 if (free_slots_le < 0){ 380 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); 381 return 0; 382 } 383 } else { 384 // otherwise, classic slots are used for LE, too 385 free_slots_classic -= num_packets_sent_le; 386 if (free_slots_classic < 0){ 387 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); 388 return 0; 389 } 390 } 391 392 switch (address_type){ 393 case BD_ADDR_TYPE_UNKNOWN: 394 log_error("hci_number_free_acl_slots: unknown address type"); 395 return 0; 396 397 case BD_ADDR_TYPE_CLASSIC: 398 return free_slots_classic; 399 400 default: 401 if (hci_stack->le_acl_packets_total_num){ 402 return free_slots_le; 403 } 404 return free_slots_classic; 405 } 406 } 407 408 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 409 // get connection type 410 hci_connection_t * connection = hci_connection_for_handle(con_handle); 411 if (!connection){ 412 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 413 return 0; 414 } 415 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 416 } 417 418 #ifdef ENABLE_CLASSIC 419 static int hci_number_free_sco_slots(void){ 420 unsigned int num_sco_packets_sent = 0; 421 btstack_linked_item_t *it; 422 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 423 hci_connection_t * connection = (hci_connection_t *) it; 424 num_sco_packets_sent += connection->num_sco_packets_sent; 425 } 426 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 427 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 428 return 0; 429 } 430 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 431 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 432 } 433 #endif 434 435 // only used to send HCI Host Number Completed Packets 436 static int hci_can_send_comand_packet_transport(void){ 437 if (hci_stack->hci_packet_buffer_reserved) return 0; 438 439 // check for async hci transport implementations 440 if (hci_stack->hci_transport->can_send_packet_now){ 441 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 442 return 0; 443 } 444 } 445 return 1; 446 } 447 448 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 449 int hci_can_send_command_packet_now(void){ 450 if (hci_can_send_comand_packet_transport() == 0) return 0; 451 return hci_stack->num_cmd_packets > 0; 452 } 453 454 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 455 // check for async hci transport implementations 456 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 457 return hci_stack->hci_transport->can_send_packet_now(packet_type); 458 } 459 460 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 461 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 462 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 463 } 464 465 int hci_can_send_acl_le_packet_now(void){ 466 if (hci_stack->hci_packet_buffer_reserved) return 0; 467 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 468 } 469 470 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 471 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 472 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 473 } 474 475 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 476 if (hci_stack->hci_packet_buffer_reserved) return 0; 477 return hci_can_send_prepared_acl_packet_now(con_handle); 478 } 479 480 #ifdef ENABLE_CLASSIC 481 int hci_can_send_acl_classic_packet_now(void){ 482 if (hci_stack->hci_packet_buffer_reserved) return 0; 483 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 484 } 485 486 int hci_can_send_prepared_sco_packet_now(void){ 487 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 488 if (!hci_stack->synchronous_flow_control_enabled) return 1; 489 return hci_number_free_sco_slots() > 0; 490 } 491 492 int hci_can_send_sco_packet_now(void){ 493 if (hci_stack->hci_packet_buffer_reserved) return 0; 494 return hci_can_send_prepared_sco_packet_now(); 495 } 496 497 void hci_request_sco_can_send_now_event(void){ 498 hci_stack->sco_waiting_for_can_send_now = 1; 499 hci_notify_if_sco_can_send_now(); 500 } 501 #endif 502 503 // used for internal checks in l2cap.c 504 int hci_is_packet_buffer_reserved(void){ 505 return hci_stack->hci_packet_buffer_reserved; 506 } 507 508 // reserves outgoing packet buffer. @returns 1 if successful 509 int hci_reserve_packet_buffer(void){ 510 if (hci_stack->hci_packet_buffer_reserved) { 511 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 512 return 0; 513 } 514 hci_stack->hci_packet_buffer_reserved = 1; 515 return 1; 516 } 517 518 void hci_release_packet_buffer(void){ 519 hci_stack->hci_packet_buffer_reserved = 0; 520 } 521 522 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 523 static int hci_transport_synchronous(void){ 524 return hci_stack->hci_transport->can_send_packet_now == NULL; 525 } 526 527 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 528 529 // 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); 530 531 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 532 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 533 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 534 max_acl_data_packet_length = hci_stack->le_data_packets_length; 535 } 536 537 // testing: reduce buffer to minimum 538 // max_acl_data_packet_length = 52; 539 540 log_debug("hci_send_acl_packet_fragments entered"); 541 542 int err; 543 // multiple packets could be send on a synchronous HCI transport 544 while (1){ 545 546 log_debug("hci_send_acl_packet_fragments loop entered"); 547 548 // get current data 549 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 550 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 551 int more_fragments = 0; 552 553 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 554 if (current_acl_data_packet_length > max_acl_data_packet_length){ 555 more_fragments = 1; 556 current_acl_data_packet_length = max_acl_data_packet_length; 557 } 558 559 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 560 if (acl_header_pos > 0){ 561 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 562 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 563 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 564 } 565 566 // update header len 567 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 568 569 // count packet 570 connection->num_acl_packets_sent++; 571 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 572 573 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 574 if (more_fragments){ 575 // update start of next fragment to send 576 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 577 } else { 578 // done 579 hci_stack->acl_fragmentation_pos = 0; 580 hci_stack->acl_fragmentation_total_size = 0; 581 } 582 583 // send packet 584 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 585 const int size = current_acl_data_packet_length + 4; 586 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 587 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 588 589 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 590 591 // done yet? 592 if (!more_fragments) break; 593 594 // can send more? 595 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 596 } 597 598 log_debug("hci_send_acl_packet_fragments loop over"); 599 600 // release buffer now for synchronous transport 601 if (hci_transport_synchronous()){ 602 hci_release_packet_buffer(); 603 // notify upper stack that it might be possible to send again 604 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 605 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 606 } 607 608 return err; 609 } 610 611 // pre: caller has reserved the packet buffer 612 int hci_send_acl_packet_buffer(int size){ 613 614 // log_info("hci_send_acl_packet_buffer size %u", size); 615 616 if (!hci_stack->hci_packet_buffer_reserved) { 617 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 618 return 0; 619 } 620 621 uint8_t * packet = hci_stack->hci_packet_buffer; 622 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 623 624 // check for free places on Bluetooth module 625 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 626 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 627 hci_release_packet_buffer(); 628 return BTSTACK_ACL_BUFFERS_FULL; 629 } 630 631 hci_connection_t *connection = hci_connection_for_handle( con_handle); 632 if (!connection) { 633 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 634 hci_release_packet_buffer(); 635 return 0; 636 } 637 638 #ifdef ENABLE_CLASSIC 639 hci_connection_timestamp(connection); 640 #endif 641 642 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 643 644 // setup data 645 hci_stack->acl_fragmentation_total_size = size; 646 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 647 648 return hci_send_acl_packet_fragments(connection); 649 } 650 651 #ifdef ENABLE_CLASSIC 652 // pre: caller has reserved the packet buffer 653 int hci_send_sco_packet_buffer(int size){ 654 655 // log_info("hci_send_acl_packet_buffer size %u", size); 656 657 if (!hci_stack->hci_packet_buffer_reserved) { 658 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 659 return 0; 660 } 661 662 uint8_t * packet = hci_stack->hci_packet_buffer; 663 664 // skip checks in loopback mode 665 if (!hci_stack->loopback_mode){ 666 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 667 668 // check for free places on Bluetooth module 669 if (!hci_can_send_prepared_sco_packet_now()) { 670 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 671 hci_release_packet_buffer(); 672 return BTSTACK_ACL_BUFFERS_FULL; 673 } 674 675 // track send packet in connection struct 676 hci_connection_t *connection = hci_connection_for_handle( con_handle); 677 if (!connection) { 678 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 679 hci_release_packet_buffer(); 680 return 0; 681 } 682 connection->num_sco_packets_sent++; 683 } 684 685 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 686 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 687 688 if (hci_transport_synchronous()){ 689 hci_release_packet_buffer(); 690 // notify upper stack that it might be possible to send again 691 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 692 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 693 } 694 695 return err; 696 } 697 #endif 698 699 static void acl_handler(uint8_t *packet, int size){ 700 701 // log_info("acl_handler: size %u", size); 702 703 // get info 704 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 705 hci_connection_t *conn = hci_connection_for_handle(con_handle); 706 uint8_t acl_flags = READ_ACL_FLAGS(packet); 707 uint16_t acl_length = READ_ACL_LENGTH(packet); 708 709 // ignore non-registered handle 710 if (!conn){ 711 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 712 return; 713 } 714 715 // assert packet is complete 716 if (acl_length + 4 != size){ 717 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 718 return; 719 } 720 721 #ifdef ENABLE_CLASSIC 722 // update idle timestamp 723 hci_connection_timestamp(conn); 724 #endif 725 726 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 727 hci_stack->host_completed_packets = 1; 728 conn->num_packets_completed++; 729 #endif 730 731 // handle different packet types 732 switch (acl_flags & 0x03) { 733 734 case 0x01: // continuation fragment 735 736 // sanity checks 737 if (conn->acl_recombination_pos == 0) { 738 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 739 return; 740 } 741 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 742 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 743 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 744 conn->acl_recombination_pos = 0; 745 return; 746 } 747 748 // append fragment payload (header already stored) 749 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 750 conn->acl_recombination_pos += acl_length; 751 752 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 753 // conn->acl_recombination_pos, conn->acl_recombination_length); 754 755 // forward complete L2CAP packet if complete. 756 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 757 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 758 // reset recombination buffer 759 conn->acl_recombination_length = 0; 760 conn->acl_recombination_pos = 0; 761 } 762 break; 763 764 case 0x02: { // first fragment 765 766 // sanity check 767 if (conn->acl_recombination_pos) { 768 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 769 conn->acl_recombination_pos = 0; 770 } 771 772 // peek into L2CAP packet! 773 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 774 775 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 776 777 // compare fragment size to L2CAP packet size 778 if (acl_length >= l2cap_length + 4){ 779 // forward fragment as L2CAP packet 780 hci_emit_acl_packet(packet, acl_length + 4); 781 } else { 782 783 if (acl_length > HCI_ACL_BUFFER_SIZE){ 784 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 785 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 786 return; 787 } 788 789 // store first fragment and tweak acl length for complete package 790 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 791 conn->acl_recombination_pos = acl_length + 4; 792 conn->acl_recombination_length = l2cap_length; 793 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 794 } 795 break; 796 797 } 798 default: 799 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 800 return; 801 } 802 803 // execute main loop 804 hci_run(); 805 } 806 807 static void hci_shutdown_connection(hci_connection_t *conn){ 808 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 809 810 #ifdef ENABLE_CLASSIC 811 #ifdef ENABLE_SCO_OVER_HCI 812 int addr_type = conn->address_type; 813 #endif 814 #endif 815 816 btstack_run_loop_remove_timer(&conn->timeout); 817 818 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 819 btstack_memory_hci_connection_free( conn ); 820 821 // now it's gone 822 hci_emit_nr_connections_changed(); 823 824 #ifdef ENABLE_CLASSIC 825 #ifdef ENABLE_SCO_OVER_HCI 826 // update SCO 827 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 828 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 829 } 830 #endif 831 #endif 832 } 833 834 #ifdef ENABLE_CLASSIC 835 836 static const uint16_t packet_type_sizes[] = { 837 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 838 HCI_ACL_DH1_SIZE, 0, 0, 0, 839 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 840 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 841 }; 842 static const uint8_t packet_type_feature_requirement_bit[] = { 843 0, // 3 slot packets 844 1, // 5 slot packets 845 25, // EDR 2 mpbs 846 26, // EDR 3 mbps 847 39, // 3 slot EDR packts 848 40, // 5 slot EDR packet 849 }; 850 static const uint16_t packet_type_feature_packet_mask[] = { 851 0x0f00, // 3 slot packets 852 0xf000, // 5 slot packets 853 0x1102, // EDR 2 mpbs 854 0x2204, // EDR 3 mbps 855 0x0300, // 3 slot EDR packts 856 0x3000, // 5 slot EDR packet 857 }; 858 859 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 860 // enable packet types based on size 861 uint16_t packet_types = 0; 862 unsigned int i; 863 for (i=0;i<16;i++){ 864 if (packet_type_sizes[i] == 0) continue; 865 if (packet_type_sizes[i] <= buffer_size){ 866 packet_types |= 1 << i; 867 } 868 } 869 // disable packet types due to missing local supported features 870 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 871 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 872 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 873 if (feature_set) continue; 874 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 875 packet_types &= ~packet_type_feature_packet_mask[i]; 876 } 877 // flip bits for "may not be used" 878 packet_types ^= 0x3306; 879 return packet_types; 880 } 881 882 uint16_t hci_usable_acl_packet_types(void){ 883 return hci_stack->packet_types; 884 } 885 #endif 886 887 uint8_t* hci_get_outgoing_packet_buffer(void){ 888 // hci packet buffer is >= acl data packet length 889 return hci_stack->hci_packet_buffer; 890 } 891 892 uint16_t hci_max_acl_data_packet_length(void){ 893 return hci_stack->acl_data_packet_length; 894 } 895 896 #ifdef ENABLE_CLASSIC 897 int hci_extended_sco_link_supported(void){ 898 // No. 31, byte 3, bit 7 899 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 900 } 901 #endif 902 903 int hci_non_flushable_packet_boundary_flag_supported(void){ 904 // No. 54, byte 6, bit 6 905 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 906 } 907 908 static int gap_ssp_supported(void){ 909 // No. 51, byte 6, bit 3 910 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 911 } 912 913 static int hci_classic_supported(void){ 914 #ifdef ENABLE_CLASSIC 915 // No. 37, byte 4, bit 5, = No BR/EDR Support 916 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 917 #else 918 return 0; 919 #endif 920 } 921 922 static int hci_le_supported(void){ 923 #ifdef ENABLE_BLE 924 // No. 37, byte 4, bit 6 = LE Supported (Controller) 925 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 926 #else 927 return 0; 928 #endif 929 } 930 931 #ifdef ENABLE_BLE 932 933 /** 934 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 935 */ 936 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 937 *addr_type = hci_stack->le_own_addr_type; 938 if (hci_stack->le_own_addr_type){ 939 memcpy(addr, hci_stack->le_random_address, 6); 940 } else { 941 memcpy(addr, hci_stack->local_bd_addr, 6); 942 } 943 } 944 945 #ifdef ENABLE_LE_CENTRAL 946 void le_handle_advertisement_report(uint8_t *packet, int size){ 947 948 UNUSED(size); 949 950 int offset = 3; 951 int num_reports = packet[offset]; 952 offset += 1; 953 954 int i; 955 // log_info("HCI: handle adv report with num reports: %d", num_reports); 956 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 957 for (i=0; i<num_reports;i++){ 958 uint8_t data_length = packet[offset + 8]; 959 uint8_t event_size = 10 + data_length; 960 int pos = 0; 961 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 962 event[pos++] = event_size; 963 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 964 offset += 8; 965 pos += 8; 966 event[pos++] = packet[offset + 1 + data_length]; // rssi 967 event[pos++] = packet[offset++]; //data_length; 968 memcpy(&event[pos], &packet[offset], data_length); 969 pos += data_length; 970 offset += data_length + 1; // rssi 971 hci_emit_event(event, pos, 1); 972 } 973 } 974 #endif 975 #endif 976 977 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 978 979 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 980 if (!hci_stack->config) return 0; 981 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 982 // Limit baud rate for Broadcom chipsets to 3 mbps 983 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 984 baud_rate = 3000000; 985 } 986 return baud_rate; 987 } 988 989 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 990 UNUSED(ds); 991 992 switch (hci_stack->substate){ 993 case HCI_INIT_W4_SEND_RESET: 994 log_info("Resend HCI Reset"); 995 hci_stack->substate = HCI_INIT_SEND_RESET; 996 hci_stack->num_cmd_packets = 1; 997 hci_run(); 998 break; 999 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1000 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1001 if (hci_stack->hci_transport->reset_link){ 1002 hci_stack->hci_transport->reset_link(); 1003 } 1004 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1005 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1006 log_info("Resend HCI Reset - CSR Warm Boot"); 1007 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1008 hci_stack->num_cmd_packets = 1; 1009 hci_run(); 1010 break; 1011 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1012 if (hci_stack->hci_transport->set_baudrate){ 1013 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1014 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1015 hci_stack->hci_transport->set_baudrate(baud_rate); 1016 } 1017 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1018 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1019 if (hci_stack->hci_transport->reset_link){ 1020 log_info("Link Reset"); 1021 hci_stack->hci_transport->reset_link(); 1022 } 1023 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1024 hci_run(); 1025 } 1026 break; 1027 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1028 // otherwise continue 1029 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1030 hci_send_cmd(&hci_read_local_supported_commands); 1031 break; 1032 default: 1033 break; 1034 } 1035 } 1036 #endif 1037 1038 static void hci_initializing_next_state(void){ 1039 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1040 } 1041 1042 // assumption: hci_can_send_command_packet_now() == true 1043 static void hci_initializing_run(void){ 1044 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1045 switch (hci_stack->substate){ 1046 case HCI_INIT_SEND_RESET: 1047 hci_state_reset(); 1048 1049 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1050 // prepare reset if command complete not received in 100ms 1051 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1052 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1053 btstack_run_loop_add_timer(&hci_stack->timeout); 1054 #endif 1055 // send command 1056 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1057 hci_send_cmd(&hci_reset); 1058 break; 1059 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1060 hci_send_cmd(&hci_read_local_version_information); 1061 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1062 break; 1063 case HCI_INIT_SEND_READ_LOCAL_NAME: 1064 hci_send_cmd(&hci_read_local_name); 1065 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1066 break; 1067 1068 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1069 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1070 hci_state_reset(); 1071 // prepare reset if command complete not received in 100ms 1072 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1073 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1074 btstack_run_loop_add_timer(&hci_stack->timeout); 1075 // send command 1076 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1077 hci_send_cmd(&hci_reset); 1078 break; 1079 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1080 hci_state_reset(); 1081 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1082 hci_send_cmd(&hci_reset); 1083 break; 1084 case HCI_INIT_SEND_BAUD_CHANGE: { 1085 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1086 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1087 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1088 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1089 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1090 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1091 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1092 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1093 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1094 btstack_run_loop_add_timer(&hci_stack->timeout); 1095 } 1096 break; 1097 } 1098 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1099 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1100 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1101 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1102 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1103 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1104 break; 1105 } 1106 case HCI_INIT_CUSTOM_INIT: 1107 // Custom initialization 1108 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1109 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1110 if (valid_cmd){ 1111 int size = 3 + hci_stack->hci_packet_buffer[2]; 1112 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1113 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1114 switch (valid_cmd) { 1115 case 1: 1116 default: 1117 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1118 break; 1119 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1120 log_info("CSR Warm Boot"); 1121 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1122 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1123 btstack_run_loop_add_timer(&hci_stack->timeout); 1124 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1125 && hci_stack->config 1126 && hci_stack->chipset 1127 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1128 && hci_stack->hci_transport->set_baudrate 1129 && hci_transport_uart_get_main_baud_rate()){ 1130 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1131 } else { 1132 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1133 } 1134 break; 1135 } 1136 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1137 break; 1138 } 1139 log_info("Init script done"); 1140 1141 // Init script download on Broadcom chipsets causes: 1142 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1143 // - baud rate to reset, restore UART baud rate if needed 1144 int need_baud_change = hci_stack->config 1145 && hci_stack->chipset 1146 && hci_stack->chipset->set_baudrate_command 1147 && hci_stack->hci_transport->set_baudrate 1148 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1149 if (need_baud_change) { 1150 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1151 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1152 hci_stack->hci_transport->set_baudrate(baud_rate); 1153 } 1154 1155 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1156 // -> Work around: wait a few milliseconds here. 1157 log_info("BCM delay after init script"); 1158 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1159 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1160 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1161 btstack_run_loop_add_timer(&hci_stack->timeout); 1162 break; 1163 } 1164 } 1165 // otherwise continue 1166 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1167 hci_send_cmd(&hci_read_local_supported_commands); 1168 break; 1169 case HCI_INIT_SET_BD_ADDR: 1170 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1171 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1172 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1173 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1174 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1175 break; 1176 #endif 1177 1178 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1179 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1180 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1181 hci_send_cmd(&hci_read_local_supported_commands); 1182 break; 1183 case HCI_INIT_READ_BD_ADDR: 1184 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1185 hci_send_cmd(&hci_read_bd_addr); 1186 break; 1187 case HCI_INIT_READ_BUFFER_SIZE: 1188 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1189 hci_send_cmd(&hci_read_buffer_size); 1190 break; 1191 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1192 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1193 hci_send_cmd(&hci_read_local_supported_features); 1194 break; 1195 1196 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1197 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1198 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1199 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1200 break; 1201 case HCI_INIT_HOST_BUFFER_SIZE: 1202 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1203 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1204 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1205 break; 1206 #endif 1207 1208 case HCI_INIT_SET_EVENT_MASK: 1209 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1210 if (hci_le_supported()){ 1211 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1212 } else { 1213 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1214 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1215 } 1216 break; 1217 1218 #ifdef ENABLE_CLASSIC 1219 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1220 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1221 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1222 break; 1223 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1224 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1225 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1226 break; 1227 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1228 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1229 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1230 break; 1231 case HCI_INIT_WRITE_LOCAL_NAME: 1232 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1233 if (hci_stack->local_name){ 1234 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1235 } else { 1236 char local_name[8+17+1]; 1237 // BTstack 11:22:33:44:55:66 1238 memcpy(local_name, "BTstack ", 8); 1239 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1240 local_name[8+17] = '\0'; 1241 log_info("---> Name %s", local_name); 1242 hci_send_cmd(&hci_write_local_name, local_name); 1243 } 1244 break; 1245 case HCI_INIT_WRITE_EIR_DATA: 1246 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1247 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1248 break; 1249 case HCI_INIT_WRITE_INQUIRY_MODE: 1250 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1251 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1252 break; 1253 case HCI_INIT_WRITE_SCAN_ENABLE: 1254 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1255 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1256 break; 1257 // only sent if ENABLE_SCO_OVER_HCI is defined 1258 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1259 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1260 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1261 break; 1262 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1263 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1264 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1265 break; 1266 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1267 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1268 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1269 log_info("BCM: Route SCO data via HCI transport"); 1270 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1271 break; 1272 1273 #endif 1274 #ifdef ENABLE_BLE 1275 // LE INIT 1276 case HCI_INIT_LE_READ_BUFFER_SIZE: 1277 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1278 hci_send_cmd(&hci_le_read_buffer_size); 1279 break; 1280 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1281 // LE Supported Host = 1, Simultaneous Host = 0 1282 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1283 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1284 break; 1285 #ifdef ENABLE_LE_CENTRAL 1286 case HCI_INIT_READ_WHITE_LIST_SIZE: 1287 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1288 hci_send_cmd(&hci_le_read_white_list_size); 1289 break; 1290 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1291 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1292 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1293 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1294 break; 1295 #endif 1296 #endif 1297 default: 1298 return; 1299 } 1300 } 1301 1302 static void hci_init_done(void){ 1303 // done. tell the app 1304 log_info("hci_init_done -> HCI_STATE_WORKING"); 1305 hci_stack->state = HCI_STATE_WORKING; 1306 hci_emit_state(); 1307 hci_run(); 1308 } 1309 1310 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1311 UNUSED(size); 1312 1313 uint8_t command_completed = 0; 1314 1315 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1316 uint16_t opcode = little_endian_read_16(packet,3); 1317 if (opcode == hci_stack->last_cmd_opcode){ 1318 command_completed = 1; 1319 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1320 } else { 1321 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1322 } 1323 } 1324 1325 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1326 uint8_t status = packet[2]; 1327 uint16_t opcode = little_endian_read_16(packet,4); 1328 if (opcode == hci_stack->last_cmd_opcode){ 1329 if (status){ 1330 command_completed = 1; 1331 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1332 } else { 1333 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1334 } 1335 } else { 1336 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1337 } 1338 } 1339 1340 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1341 1342 // Vendor == CSR 1343 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1344 // TODO: track actual command 1345 command_completed = 1; 1346 } 1347 1348 // Vendor == Toshiba 1349 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1350 // TODO: track actual command 1351 command_completed = 1; 1352 } 1353 1354 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1355 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1356 // 1357 // HCI Reset 1358 // Timeout 100 ms 1359 // HCI Reset 1360 // Command Complete Reset 1361 // HCI Read Local Version Information 1362 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1363 // hang... 1364 // 1365 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1366 if (!command_completed 1367 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1368 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1369 1370 uint16_t opcode = little_endian_read_16(packet,3); 1371 if (opcode == hci_reset.opcode){ 1372 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1373 return; 1374 } 1375 } 1376 1377 // CSR & H5 1378 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1379 if (!command_completed 1380 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1381 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1382 1383 uint16_t opcode = little_endian_read_16(packet,3); 1384 if (opcode == hci_reset.opcode){ 1385 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1386 return; 1387 } 1388 } 1389 1390 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1391 // fix: Correct substate and behave as command below 1392 if (command_completed){ 1393 switch (hci_stack->substate){ 1394 case HCI_INIT_SEND_RESET: 1395 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1396 break; 1397 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1398 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1399 break; 1400 default: 1401 break; 1402 } 1403 } 1404 1405 #endif 1406 1407 if (!command_completed) return; 1408 1409 int need_baud_change = 0; 1410 int need_addr_change = 0; 1411 1412 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1413 need_baud_change = hci_stack->config 1414 && hci_stack->chipset 1415 && hci_stack->chipset->set_baudrate_command 1416 && hci_stack->hci_transport->set_baudrate 1417 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1418 1419 need_addr_change = hci_stack->custom_bd_addr_set 1420 && hci_stack->chipset 1421 && hci_stack->chipset->set_bd_addr_command; 1422 #endif 1423 1424 switch(hci_stack->substate){ 1425 1426 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1427 case HCI_INIT_SEND_RESET: 1428 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1429 // fix: just correct substate and behave as command below 1430 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1431 btstack_run_loop_remove_timer(&hci_stack->timeout); 1432 break; 1433 case HCI_INIT_W4_SEND_RESET: 1434 btstack_run_loop_remove_timer(&hci_stack->timeout); 1435 break; 1436 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1437 log_info("Received local name, need baud change %d", need_baud_change); 1438 if (need_baud_change){ 1439 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1440 return; 1441 } 1442 // skip baud change 1443 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1444 return; 1445 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1446 // for STLC2500D, baud rate change already happened. 1447 // for others, baud rate gets changed now 1448 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1449 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1450 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1451 hci_stack->hci_transport->set_baudrate(baud_rate); 1452 } 1453 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1454 return; 1455 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1456 btstack_run_loop_remove_timer(&hci_stack->timeout); 1457 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1458 return; 1459 case HCI_INIT_W4_CUSTOM_INIT: 1460 // repeat custom init 1461 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1462 return; 1463 #else 1464 case HCI_INIT_W4_SEND_RESET: 1465 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1466 return ; 1467 #endif 1468 1469 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1470 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1471 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1472 return; 1473 } 1474 if (need_addr_change){ 1475 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1476 return; 1477 } 1478 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1479 return; 1480 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1481 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1482 if (need_baud_change){ 1483 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1484 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1485 hci_stack->hci_transport->set_baudrate(baud_rate); 1486 } 1487 if (need_addr_change){ 1488 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1489 return; 1490 } 1491 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1492 return; 1493 case HCI_INIT_W4_SET_BD_ADDR: 1494 // for STLC2500D, bd addr change only gets active after sending reset command 1495 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1496 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1497 return; 1498 } 1499 // skipping st warm boot 1500 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1501 return; 1502 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1503 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1504 return; 1505 #endif 1506 case HCI_INIT_W4_READ_BD_ADDR: 1507 // only read buffer size if supported 1508 if (hci_stack->local_supported_commands[0] & 0x01) { 1509 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1510 return; 1511 } 1512 // skipping read buffer size 1513 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1514 return; 1515 case HCI_INIT_W4_SET_EVENT_MASK: 1516 // skip Classic init commands for LE only chipsets 1517 if (!hci_classic_supported()){ 1518 #ifdef ENABLE_BLE 1519 if (hci_le_supported()){ 1520 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1521 return; 1522 } 1523 #endif 1524 log_error("Neither BR/EDR nor LE supported"); 1525 hci_init_done(); 1526 return; 1527 } 1528 if (!gap_ssp_supported()){ 1529 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1530 return; 1531 } 1532 break; 1533 #ifdef ENABLE_BLE 1534 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1535 // skip write le host if not supported (e.g. on LE only EM9301) 1536 if (hci_stack->local_supported_commands[0] & 0x02) break; 1537 #ifdef ENABLE_LE_CENTRAL 1538 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1539 #else 1540 hci_init_done(); 1541 #endif 1542 return; 1543 #endif 1544 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1545 // skip write eir data if no eir data set 1546 if (hci_stack->eir_data) break; 1547 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1548 return; 1549 1550 #ifdef ENABLE_SCO_OVER_HCI 1551 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1552 // skip write synchronous flow control if not supported 1553 if (hci_stack->local_supported_commands[0] & 0x04) break; 1554 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1555 // explicit fall through to reduce repetitions 1556 1557 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1558 // skip write default erroneous data reporting if not supported 1559 if (hci_stack->local_supported_commands[0] & 0x08) break; 1560 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1561 // explicit fall through to reduce repetitions 1562 1563 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1564 // skip bcm set sco pcm config on non-Broadcom chipsets 1565 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1566 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1567 // explicit fall through to reduce repetitions 1568 1569 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1570 if (!hci_le_supported()){ 1571 // SKIP LE init for Classic only configuration 1572 hci_init_done(); 1573 return; 1574 } 1575 break; 1576 1577 #else /* !ENABLE_SCO_OVER_HCI */ 1578 1579 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1580 #ifdef ENABLE_BLE 1581 if (hci_le_supported()){ 1582 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1583 return; 1584 } 1585 #endif 1586 // SKIP LE init for Classic only configuration 1587 hci_init_done(); 1588 return; 1589 #endif /* ENABLE_SCO_OVER_HCI */ 1590 1591 // Response to command before init done state -> init done 1592 case (HCI_INIT_DONE-1): 1593 hci_init_done(); 1594 return; 1595 1596 default: 1597 break; 1598 } 1599 hci_initializing_next_state(); 1600 } 1601 1602 static void event_handler(uint8_t *packet, int size){ 1603 1604 uint16_t event_length = packet[1]; 1605 1606 // assert packet is complete 1607 if (size != event_length + 2){ 1608 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1609 return; 1610 } 1611 1612 bd_addr_t addr; 1613 bd_addr_type_t addr_type; 1614 hci_con_handle_t handle; 1615 hci_connection_t * conn; 1616 int i; 1617 #ifdef ENABLE_CLASSIC 1618 uint8_t link_type; 1619 #endif 1620 1621 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1622 1623 switch (hci_event_packet_get_type(packet)) { 1624 1625 case HCI_EVENT_COMMAND_COMPLETE: 1626 // get num cmd packets - limit to 1 to reduce complexity 1627 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1628 1629 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1630 if (packet[5]) break; 1631 // terminate, name 248 chars 1632 packet[6+248] = 0; 1633 log_info("local name: %s", &packet[6]); 1634 } 1635 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1636 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1637 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1638 uint16_t acl_len = little_endian_read_16(packet, 6); 1639 uint16_t sco_len = packet[8]; 1640 1641 // determine usable ACL/SCO payload size 1642 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1643 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1644 1645 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1646 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1647 1648 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1649 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1650 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1651 } 1652 } 1653 #ifdef ENABLE_BLE 1654 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1655 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1656 hci_stack->le_acl_packets_total_num = packet[8]; 1657 // determine usable ACL payload size 1658 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1659 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1660 } 1661 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1662 } 1663 #ifdef ENABLE_LE_CENTRAL 1664 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1665 hci_stack->le_whitelist_capacity = packet[6]; 1666 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1667 } 1668 #endif 1669 #endif 1670 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1671 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1672 hci_stack->local_bd_addr); 1673 log_info("Local Address, Status: 0x%02x: Addr: %s", 1674 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1675 #ifdef ENABLE_CLASSIC 1676 if (hci_stack->link_key_db){ 1677 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1678 } 1679 #endif 1680 } 1681 #ifdef ENABLE_CLASSIC 1682 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1683 hci_emit_discoverable_enabled(hci_stack->discoverable); 1684 } 1685 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1686 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1687 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1688 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1689 hci_emit_event(event, sizeof(event), 1); 1690 } 1691 } 1692 #endif 1693 1694 // Note: HCI init checks 1695 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1696 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1697 1698 #ifdef ENABLE_CLASSIC 1699 // determine usable ACL packet types based on host buffer size and supported features 1700 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1701 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1702 #endif 1703 // Classic/LE 1704 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1705 } 1706 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1707 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1708 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1709 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1710 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1711 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1712 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1713 } 1714 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1715 hci_stack->local_supported_commands[0] = 1716 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1717 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1718 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1719 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1720 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1721 } 1722 #ifdef ENABLE_CLASSIC 1723 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1724 if (packet[5] == 0){ 1725 hci_stack->synchronous_flow_control_enabled = 1; 1726 } 1727 } 1728 #endif 1729 break; 1730 1731 case HCI_EVENT_COMMAND_STATUS: 1732 // get num cmd packets - limit to 1 to reduce complexity 1733 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1734 break; 1735 1736 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1737 int offset = 3; 1738 for (i=0; i<packet[2];i++){ 1739 handle = little_endian_read_16(packet, offset); 1740 offset += 2; 1741 uint16_t num_packets = little_endian_read_16(packet, offset); 1742 offset += 2; 1743 1744 conn = hci_connection_for_handle(handle); 1745 if (!conn){ 1746 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1747 continue; 1748 } 1749 1750 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1751 #ifdef ENABLE_CLASSIC 1752 if (conn->num_sco_packets_sent >= num_packets){ 1753 conn->num_sco_packets_sent -= num_packets; 1754 } else { 1755 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1756 conn->num_sco_packets_sent = 0; 1757 } 1758 hci_notify_if_sco_can_send_now(); 1759 #endif 1760 } else { 1761 if (conn->num_acl_packets_sent >= num_packets){ 1762 conn->num_acl_packets_sent -= num_packets; 1763 } else { 1764 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1765 conn->num_acl_packets_sent = 0; 1766 } 1767 } 1768 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1769 } 1770 break; 1771 } 1772 1773 #ifdef ENABLE_CLASSIC 1774 case HCI_EVENT_INQUIRY_COMPLETE: 1775 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1776 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1777 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1778 hci_emit_event(event, sizeof(event), 1); 1779 } 1780 break; 1781 case HCI_EVENT_CONNECTION_REQUEST: 1782 reverse_bd_addr(&packet[2], addr); 1783 // TODO: eval COD 8-10 1784 link_type = packet[11]; 1785 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1786 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1787 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1788 if (!conn) { 1789 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1790 } 1791 if (!conn) { 1792 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1793 hci_stack->decline_reason = 0x0d; 1794 bd_addr_copy(hci_stack->decline_addr, addr); 1795 break; 1796 } 1797 conn->role = HCI_ROLE_SLAVE; 1798 conn->state = RECEIVED_CONNECTION_REQUEST; 1799 // store info about eSCO 1800 if (link_type == 0x02){ 1801 conn->remote_supported_feature_eSCO = 1; 1802 } 1803 hci_run(); 1804 break; 1805 1806 case HCI_EVENT_CONNECTION_COMPLETE: 1807 // Connection management 1808 reverse_bd_addr(&packet[5], addr); 1809 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1810 addr_type = BD_ADDR_TYPE_CLASSIC; 1811 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1812 if (conn) { 1813 if (!packet[2]){ 1814 conn->state = OPEN; 1815 conn->con_handle = little_endian_read_16(packet, 3); 1816 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1817 1818 // restart timer 1819 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1820 btstack_run_loop_add_timer(&conn->timeout); 1821 1822 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1823 1824 hci_emit_nr_connections_changed(); 1825 } else { 1826 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1827 uint8_t status = packet[2]; 1828 bd_addr_t bd_address; 1829 memcpy(&bd_address, conn->address, 6); 1830 1831 // connection failed, remove entry 1832 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1833 btstack_memory_hci_connection_free( conn ); 1834 1835 // notify client if dedicated bonding 1836 if (notify_dedicated_bonding_failed){ 1837 log_info("hci notify_dedicated_bonding_failed"); 1838 hci_emit_dedicated_bonding_result(bd_address, status); 1839 } 1840 1841 // if authentication error, also delete link key 1842 if (packet[2] == 0x05) { 1843 gap_drop_link_key_for_bd_addr(addr); 1844 } 1845 } 1846 } 1847 break; 1848 1849 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1850 reverse_bd_addr(&packet[5], addr); 1851 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1852 if (packet[2]){ 1853 // connection failed 1854 break; 1855 } 1856 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1857 if (!conn) { 1858 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1859 } 1860 if (!conn) { 1861 break; 1862 } 1863 conn->state = OPEN; 1864 conn->con_handle = little_endian_read_16(packet, 3); 1865 1866 #ifdef ENABLE_SCO_OVER_HCI 1867 // update SCO 1868 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1869 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1870 } 1871 #endif 1872 break; 1873 1874 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1875 handle = little_endian_read_16(packet, 3); 1876 conn = hci_connection_for_handle(handle); 1877 if (!conn) break; 1878 if (!packet[2]){ 1879 uint8_t * features = &packet[5]; 1880 if (features[6] & (1 << 3)){ 1881 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1882 } 1883 if (features[3] & (1<<7)){ 1884 conn->remote_supported_feature_eSCO = 1; 1885 } 1886 } 1887 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1888 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1889 if (conn->bonding_flags & BONDING_DEDICATED){ 1890 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1891 } 1892 break; 1893 1894 case HCI_EVENT_LINK_KEY_REQUEST: 1895 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1896 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1897 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1898 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1899 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1900 hci_run(); 1901 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1902 return; 1903 1904 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1905 reverse_bd_addr(&packet[2], addr); 1906 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1907 if (!conn) break; 1908 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1909 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1910 // Change Connection Encryption keeps link key type 1911 if (link_key_type != CHANGED_COMBINATION_KEY){ 1912 conn->link_key_type = link_key_type; 1913 } 1914 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1915 // still forward event to allow dismiss of pairing dialog 1916 break; 1917 } 1918 1919 case HCI_EVENT_PIN_CODE_REQUEST: 1920 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1921 // non-bondable mode: pin code negative reply will be sent 1922 if (!hci_stack->bondable){ 1923 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1924 hci_run(); 1925 return; 1926 } 1927 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1928 if (!hci_stack->link_key_db) break; 1929 hci_event_pin_code_request_get_bd_addr(packet, addr); 1930 hci_stack->link_key_db->delete_link_key(addr); 1931 break; 1932 1933 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1934 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1935 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1936 break; 1937 1938 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1939 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1940 if (!hci_stack->ssp_auto_accept) break; 1941 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1942 break; 1943 1944 case HCI_EVENT_USER_PASSKEY_REQUEST: 1945 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1946 if (!hci_stack->ssp_auto_accept) break; 1947 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1948 break; 1949 #endif 1950 1951 case HCI_EVENT_ENCRYPTION_CHANGE: 1952 handle = little_endian_read_16(packet, 3); 1953 conn = hci_connection_for_handle(handle); 1954 if (!conn) break; 1955 if (packet[2] == 0) { 1956 if (packet[5]){ 1957 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1958 } else { 1959 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1960 } 1961 } 1962 #ifdef ENABLE_CLASSIC 1963 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1964 #endif 1965 break; 1966 1967 #ifdef ENABLE_CLASSIC 1968 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1969 handle = little_endian_read_16(packet, 3); 1970 conn = hci_connection_for_handle(handle); 1971 if (!conn) break; 1972 1973 // dedicated bonding: send result and disconnect 1974 if (conn->bonding_flags & BONDING_DEDICATED){ 1975 conn->bonding_flags &= ~BONDING_DEDICATED; 1976 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1977 conn->bonding_status = packet[2]; 1978 break; 1979 } 1980 1981 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1982 // link key sufficient for requested security 1983 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1984 break; 1985 } 1986 // not enough 1987 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1988 break; 1989 #endif 1990 1991 // HCI_EVENT_DISCONNECTION_COMPLETE 1992 // has been split, to first notify stack before shutting connection down 1993 // see end of function, too. 1994 case HCI_EVENT_DISCONNECTION_COMPLETE: 1995 if (packet[2]) break; // status != 0 1996 handle = little_endian_read_16(packet, 3); 1997 // drop outgoing ACL fragments if it is for closed connection 1998 if (hci_stack->acl_fragmentation_total_size > 0) { 1999 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2000 log_info("hci: drop fragmented ACL data for closed connection"); 2001 hci_stack->acl_fragmentation_total_size = 0; 2002 hci_stack->acl_fragmentation_pos = 0; 2003 } 2004 } 2005 2006 // re-enable advertisements for le connections if active 2007 conn = hci_connection_for_handle(handle); 2008 if (!conn) break; 2009 #ifdef ENABLE_BLE 2010 #ifdef ENABLE_LE_PERIPHERAL 2011 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2012 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2013 } 2014 #endif 2015 #endif 2016 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2017 break; 2018 2019 case HCI_EVENT_HARDWARE_ERROR: 2020 log_error("Hardware Error: 0x%02x", packet[2]); 2021 if (hci_stack->hardware_error_callback){ 2022 (*hci_stack->hardware_error_callback)(packet[2]); 2023 } else { 2024 // if no special requests, just reboot stack 2025 hci_power_control_off(); 2026 hci_power_control_on(); 2027 } 2028 break; 2029 2030 #ifdef ENABLE_CLASSIC 2031 case HCI_EVENT_ROLE_CHANGE: 2032 if (packet[2]) break; // status != 0 2033 handle = little_endian_read_16(packet, 3); 2034 conn = hci_connection_for_handle(handle); 2035 if (!conn) break; // no conn 2036 conn->role = packet[9]; 2037 break; 2038 #endif 2039 2040 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2041 // release packet buffer only for asynchronous transport and if there are not further fragements 2042 if (hci_transport_synchronous()) { 2043 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2044 return; // instead of break: to avoid re-entering hci_run() 2045 } 2046 if (hci_stack->acl_fragmentation_total_size) break; 2047 hci_release_packet_buffer(); 2048 2049 // L2CAP receives this event via the hci_emit_event below 2050 2051 #ifdef ENABLE_CLASSIC 2052 // For SCO, we do the can_send_now_check here 2053 hci_notify_if_sco_can_send_now(); 2054 #endif 2055 break; 2056 2057 #ifdef ENABLE_CLASSIC 2058 case HCI_EVENT_SCO_CAN_SEND_NOW: 2059 // For SCO, we do the can_send_now_check here 2060 hci_notify_if_sco_can_send_now(); 2061 return; 2062 2063 // explode inquriy results for easier consumption 2064 case HCI_EVENT_INQUIRY_RESULT: 2065 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2066 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2067 gap_inquiry_explode(packet); 2068 break; 2069 #endif 2070 2071 #ifdef ENABLE_BLE 2072 case HCI_EVENT_LE_META: 2073 switch (packet[2]){ 2074 #ifdef ENABLE_LE_CENTRAL 2075 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2076 // log_info("advertising report received"); 2077 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2078 le_handle_advertisement_report(packet, size); 2079 break; 2080 #endif 2081 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2082 // Connection management 2083 reverse_bd_addr(&packet[8], addr); 2084 addr_type = (bd_addr_type_t)packet[7]; 2085 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2086 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2087 #ifdef ENABLE_LE_CENTRAL 2088 // if auto-connect, remove from whitelist in both roles 2089 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2090 hci_remove_from_whitelist(addr_type, addr); 2091 } 2092 // handle error: error is reported only to the initiator -> outgoing connection 2093 if (packet[3]){ 2094 // outgoing connection establishment is done 2095 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2096 // remove entry 2097 if (conn){ 2098 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2099 btstack_memory_hci_connection_free( conn ); 2100 } 2101 break; 2102 } 2103 #endif 2104 // on success, both hosts receive connection complete event 2105 if (packet[6] == HCI_ROLE_MASTER){ 2106 #ifdef ENABLE_LE_CENTRAL 2107 // if we're master, it was an outgoing connection and we're done with it 2108 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2109 #endif 2110 } else { 2111 #ifdef ENABLE_LE_PERIPHERAL 2112 // if we're slave, it was an incoming connection, advertisements have stopped 2113 hci_stack->le_advertisements_active = 0; 2114 // try to re-enable them 2115 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2116 #endif 2117 } 2118 // LE connections are auto-accepted, so just create a connection if there isn't one already 2119 if (!conn){ 2120 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2121 } 2122 // no memory, sorry. 2123 if (!conn){ 2124 break; 2125 } 2126 2127 conn->state = OPEN; 2128 conn->role = packet[6]; 2129 conn->con_handle = little_endian_read_16(packet, 4); 2130 2131 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2132 2133 // restart timer 2134 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2135 // btstack_run_loop_add_timer(&conn->timeout); 2136 2137 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2138 2139 hci_emit_nr_connections_changed(); 2140 break; 2141 2142 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2143 2144 default: 2145 break; 2146 } 2147 break; 2148 #endif 2149 default: 2150 break; 2151 } 2152 2153 // handle BT initialization 2154 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2155 hci_initializing_event_handler(packet, size); 2156 } 2157 2158 // help with BT sleep 2159 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2160 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2161 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2162 hci_initializing_next_state(); 2163 } 2164 2165 // notify upper stack 2166 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2167 2168 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2169 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2170 if (!packet[2]){ 2171 handle = little_endian_read_16(packet, 3); 2172 hci_connection_t * aConn = hci_connection_for_handle(handle); 2173 if (aConn) { 2174 uint8_t status = aConn->bonding_status; 2175 uint16_t flags = aConn->bonding_flags; 2176 bd_addr_t bd_address; 2177 memcpy(&bd_address, aConn->address, 6); 2178 hci_shutdown_connection(aConn); 2179 // connection struct is gone, don't access anymore 2180 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2181 hci_emit_dedicated_bonding_result(bd_address, status); 2182 } 2183 } 2184 } 2185 } 2186 2187 // execute main loop 2188 hci_run(); 2189 } 2190 2191 #ifdef ENABLE_CLASSIC 2192 static void sco_handler(uint8_t * packet, uint16_t size){ 2193 if (!hci_stack->sco_packet_handler) return; 2194 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2195 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2196 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2197 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2198 if (conn){ 2199 conn->num_packets_completed++; 2200 hci_stack->host_completed_packets = 1; 2201 hci_run(); 2202 } 2203 #endif 2204 } 2205 #endif 2206 2207 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2208 hci_dump_packet(packet_type, 1, packet, size); 2209 switch (packet_type) { 2210 case HCI_EVENT_PACKET: 2211 event_handler(packet, size); 2212 break; 2213 case HCI_ACL_DATA_PACKET: 2214 acl_handler(packet, size); 2215 break; 2216 #ifdef ENABLE_CLASSIC 2217 case HCI_SCO_DATA_PACKET: 2218 sco_handler(packet, size); 2219 break; 2220 #endif 2221 default: 2222 break; 2223 } 2224 } 2225 2226 /** 2227 * @brief Add event packet handler. 2228 */ 2229 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2230 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2231 } 2232 2233 2234 /** Register HCI packet handlers */ 2235 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2236 hci_stack->acl_packet_handler = handler; 2237 } 2238 2239 #ifdef ENABLE_CLASSIC 2240 /** 2241 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2242 */ 2243 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2244 hci_stack->sco_packet_handler = handler; 2245 } 2246 #endif 2247 2248 static void hci_state_reset(void){ 2249 // no connections yet 2250 hci_stack->connections = NULL; 2251 2252 // keep discoverable/connectable as this has been requested by the client(s) 2253 // hci_stack->discoverable = 0; 2254 // hci_stack->connectable = 0; 2255 // hci_stack->bondable = 1; 2256 // hci_stack->own_addr_type = 0; 2257 2258 // buffer is free 2259 hci_stack->hci_packet_buffer_reserved = 0; 2260 2261 // no pending cmds 2262 hci_stack->decline_reason = 0; 2263 hci_stack->new_scan_enable_value = 0xff; 2264 2265 // LE 2266 #ifdef ENABLE_BLE 2267 memset(hci_stack->le_random_address, 0, 6); 2268 hci_stack->le_random_address_set = 0; 2269 #endif 2270 #ifdef ENABLE_LE_CENTRAL 2271 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2272 hci_stack->le_scan_type = 0xff; 2273 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2274 hci_stack->le_whitelist = 0; 2275 hci_stack->le_whitelist_capacity = 0; 2276 #endif 2277 2278 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2279 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2280 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2281 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2282 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2283 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2284 } 2285 2286 #ifdef ENABLE_CLASSIC 2287 /** 2288 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2289 */ 2290 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2291 // store and open remote device db 2292 hci_stack->link_key_db = link_key_db; 2293 if (hci_stack->link_key_db) { 2294 hci_stack->link_key_db->open(); 2295 } 2296 } 2297 #endif 2298 2299 void hci_init(const hci_transport_t *transport, const void *config){ 2300 2301 #ifdef HAVE_MALLOC 2302 if (!hci_stack) { 2303 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2304 } 2305 #else 2306 hci_stack = &hci_stack_static; 2307 #endif 2308 memset(hci_stack, 0, sizeof(hci_stack_t)); 2309 2310 // reference to use transport layer implementation 2311 hci_stack->hci_transport = transport; 2312 2313 // reference to used config 2314 hci_stack->config = config; 2315 2316 // setup pointer for outgoing packet buffer 2317 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2318 2319 // max acl payload size defined in config.h 2320 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2321 2322 // register packet handlers with transport 2323 transport->register_packet_handler(&packet_handler); 2324 2325 hci_stack->state = HCI_STATE_OFF; 2326 2327 // class of device 2328 hci_stack->class_of_device = 0x007a020c; // Smartphone 2329 2330 // bondable by default 2331 hci_stack->bondable = 1; 2332 2333 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2334 hci_stack->ssp_enable = 1; 2335 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2336 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2337 hci_stack->ssp_auto_accept = 1; 2338 2339 // voice setting - signed 16 bit pcm data with CVSD over the air 2340 hci_stack->sco_voice_setting = 0x60; 2341 2342 hci_state_reset(); 2343 } 2344 2345 /** 2346 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2347 */ 2348 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2349 hci_stack->chipset = chipset_driver; 2350 2351 // reset chipset driver - init is also called on power_up 2352 if (hci_stack->chipset && hci_stack->chipset->init){ 2353 hci_stack->chipset->init(hci_stack->config); 2354 } 2355 } 2356 2357 /** 2358 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2359 */ 2360 void hci_set_control(const btstack_control_t *hardware_control){ 2361 // references to used control implementation 2362 hci_stack->control = hardware_control; 2363 // init with transport config 2364 hardware_control->init(hci_stack->config); 2365 } 2366 2367 void hci_close(void){ 2368 // close remote device db 2369 if (hci_stack->link_key_db) { 2370 hci_stack->link_key_db->close(); 2371 } 2372 2373 btstack_linked_list_iterator_t lit; 2374 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2375 while (btstack_linked_list_iterator_has_next(&lit)){ 2376 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2377 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2378 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2379 hci_shutdown_connection(connection); 2380 } 2381 2382 hci_power_control(HCI_POWER_OFF); 2383 2384 #ifdef HAVE_MALLOC 2385 free(hci_stack); 2386 #endif 2387 hci_stack = NULL; 2388 } 2389 2390 #ifdef ENABLE_CLASSIC 2391 void gap_set_class_of_device(uint32_t class_of_device){ 2392 hci_stack->class_of_device = class_of_device; 2393 } 2394 2395 void hci_disable_l2cap_timeout_check(void){ 2396 disable_l2cap_timeouts = 1; 2397 } 2398 #endif 2399 2400 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2401 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2402 void hci_set_bd_addr(bd_addr_t addr){ 2403 memcpy(hci_stack->custom_bd_addr, addr, 6); 2404 hci_stack->custom_bd_addr_set = 1; 2405 } 2406 #endif 2407 2408 // State-Module-Driver overview 2409 // state module low-level 2410 // HCI_STATE_OFF off close 2411 // HCI_STATE_INITIALIZING, on open 2412 // HCI_STATE_WORKING, on open 2413 // HCI_STATE_HALTING, on open 2414 // HCI_STATE_SLEEPING, off/sleep close 2415 // HCI_STATE_FALLING_ASLEEP on open 2416 2417 static int hci_power_control_on(void){ 2418 2419 // power on 2420 int err = 0; 2421 if (hci_stack->control && hci_stack->control->on){ 2422 err = (*hci_stack->control->on)(); 2423 } 2424 if (err){ 2425 log_error( "POWER_ON failed"); 2426 hci_emit_hci_open_failed(); 2427 return err; 2428 } 2429 2430 // int chipset driver 2431 if (hci_stack->chipset && hci_stack->chipset->init){ 2432 hci_stack->chipset->init(hci_stack->config); 2433 } 2434 2435 // init transport 2436 if (hci_stack->hci_transport->init){ 2437 hci_stack->hci_transport->init(hci_stack->config); 2438 } 2439 2440 // open transport 2441 err = hci_stack->hci_transport->open(); 2442 if (err){ 2443 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2444 if (hci_stack->control && hci_stack->control->off){ 2445 (*hci_stack->control->off)(); 2446 } 2447 hci_emit_hci_open_failed(); 2448 return err; 2449 } 2450 return 0; 2451 } 2452 2453 static void hci_power_control_off(void){ 2454 2455 log_info("hci_power_control_off"); 2456 2457 // close low-level device 2458 hci_stack->hci_transport->close(); 2459 2460 log_info("hci_power_control_off - hci_transport closed"); 2461 2462 // power off 2463 if (hci_stack->control && hci_stack->control->off){ 2464 (*hci_stack->control->off)(); 2465 } 2466 2467 log_info("hci_power_control_off - control closed"); 2468 2469 hci_stack->state = HCI_STATE_OFF; 2470 } 2471 2472 static void hci_power_control_sleep(void){ 2473 2474 log_info("hci_power_control_sleep"); 2475 2476 #if 0 2477 // don't close serial port during sleep 2478 2479 // close low-level device 2480 hci_stack->hci_transport->close(hci_stack->config); 2481 #endif 2482 2483 // sleep mode 2484 if (hci_stack->control && hci_stack->control->sleep){ 2485 (*hci_stack->control->sleep)(); 2486 } 2487 2488 hci_stack->state = HCI_STATE_SLEEPING; 2489 } 2490 2491 static int hci_power_control_wake(void){ 2492 2493 log_info("hci_power_control_wake"); 2494 2495 // wake on 2496 if (hci_stack->control && hci_stack->control->wake){ 2497 (*hci_stack->control->wake)(); 2498 } 2499 2500 #if 0 2501 // open low-level device 2502 int err = hci_stack->hci_transport->open(hci_stack->config); 2503 if (err){ 2504 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2505 if (hci_stack->control && hci_stack->control->off){ 2506 (*hci_stack->control->off)(); 2507 } 2508 hci_emit_hci_open_failed(); 2509 return err; 2510 } 2511 #endif 2512 2513 return 0; 2514 } 2515 2516 static void hci_power_transition_to_initializing(void){ 2517 // set up state machine 2518 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2519 hci_stack->hci_packet_buffer_reserved = 0; 2520 hci_stack->state = HCI_STATE_INITIALIZING; 2521 hci_stack->substate = HCI_INIT_SEND_RESET; 2522 } 2523 2524 int hci_power_control(HCI_POWER_MODE power_mode){ 2525 2526 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2527 2528 int err = 0; 2529 switch (hci_stack->state){ 2530 2531 case HCI_STATE_OFF: 2532 switch (power_mode){ 2533 case HCI_POWER_ON: 2534 err = hci_power_control_on(); 2535 if (err) { 2536 log_error("hci_power_control_on() error %d", err); 2537 return err; 2538 } 2539 hci_power_transition_to_initializing(); 2540 break; 2541 case HCI_POWER_OFF: 2542 // do nothing 2543 break; 2544 case HCI_POWER_SLEEP: 2545 // do nothing (with SLEEP == OFF) 2546 break; 2547 } 2548 break; 2549 2550 case HCI_STATE_INITIALIZING: 2551 switch (power_mode){ 2552 case HCI_POWER_ON: 2553 // do nothing 2554 break; 2555 case HCI_POWER_OFF: 2556 // no connections yet, just turn it off 2557 hci_power_control_off(); 2558 break; 2559 case HCI_POWER_SLEEP: 2560 // no connections yet, just turn it off 2561 hci_power_control_sleep(); 2562 break; 2563 } 2564 break; 2565 2566 case HCI_STATE_WORKING: 2567 switch (power_mode){ 2568 case HCI_POWER_ON: 2569 // do nothing 2570 break; 2571 case HCI_POWER_OFF: 2572 // see hci_run 2573 hci_stack->state = HCI_STATE_HALTING; 2574 break; 2575 case HCI_POWER_SLEEP: 2576 // see hci_run 2577 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2578 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2579 break; 2580 } 2581 break; 2582 2583 case HCI_STATE_HALTING: 2584 switch (power_mode){ 2585 case HCI_POWER_ON: 2586 hci_power_transition_to_initializing(); 2587 break; 2588 case HCI_POWER_OFF: 2589 // do nothing 2590 break; 2591 case HCI_POWER_SLEEP: 2592 // see hci_run 2593 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2594 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2595 break; 2596 } 2597 break; 2598 2599 case HCI_STATE_FALLING_ASLEEP: 2600 switch (power_mode){ 2601 case HCI_POWER_ON: 2602 2603 #ifdef HAVE_PLATFORM_IPHONE_OS 2604 // nothing to do, if H4 supports power management 2605 if (btstack_control_iphone_power_management_enabled()){ 2606 hci_stack->state = HCI_STATE_INITIALIZING; 2607 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2608 break; 2609 } 2610 #endif 2611 hci_power_transition_to_initializing(); 2612 break; 2613 case HCI_POWER_OFF: 2614 // see hci_run 2615 hci_stack->state = HCI_STATE_HALTING; 2616 break; 2617 case HCI_POWER_SLEEP: 2618 // do nothing 2619 break; 2620 } 2621 break; 2622 2623 case HCI_STATE_SLEEPING: 2624 switch (power_mode){ 2625 case HCI_POWER_ON: 2626 2627 #ifdef HAVE_PLATFORM_IPHONE_OS 2628 // nothing to do, if H4 supports power management 2629 if (btstack_control_iphone_power_management_enabled()){ 2630 hci_stack->state = HCI_STATE_INITIALIZING; 2631 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2632 hci_update_scan_enable(); 2633 break; 2634 } 2635 #endif 2636 err = hci_power_control_wake(); 2637 if (err) return err; 2638 hci_power_transition_to_initializing(); 2639 break; 2640 case HCI_POWER_OFF: 2641 hci_stack->state = HCI_STATE_HALTING; 2642 break; 2643 case HCI_POWER_SLEEP: 2644 // do nothing 2645 break; 2646 } 2647 break; 2648 } 2649 2650 // create internal event 2651 hci_emit_state(); 2652 2653 // trigger next/first action 2654 hci_run(); 2655 2656 return 0; 2657 } 2658 2659 2660 #ifdef ENABLE_CLASSIC 2661 2662 static void hci_update_scan_enable(void){ 2663 // 2 = page scan, 1 = inq scan 2664 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2665 hci_run(); 2666 } 2667 2668 void gap_discoverable_control(uint8_t enable){ 2669 if (enable) enable = 1; // normalize argument 2670 2671 if (hci_stack->discoverable == enable){ 2672 hci_emit_discoverable_enabled(hci_stack->discoverable); 2673 return; 2674 } 2675 2676 hci_stack->discoverable = enable; 2677 hci_update_scan_enable(); 2678 } 2679 2680 void gap_connectable_control(uint8_t enable){ 2681 if (enable) enable = 1; // normalize argument 2682 2683 // don't emit event 2684 if (hci_stack->connectable == enable) return; 2685 2686 hci_stack->connectable = enable; 2687 hci_update_scan_enable(); 2688 } 2689 #endif 2690 2691 void gap_local_bd_addr(bd_addr_t address_buffer){ 2692 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2693 } 2694 2695 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2696 static void hci_host_num_completed_packets(void){ 2697 2698 // create packet manually as arrays are not supported and num_commands should not get reduced 2699 hci_reserve_packet_buffer(); 2700 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2701 2702 uint16_t size = 0; 2703 uint16_t num_handles = 0; 2704 packet[size++] = 0x35; 2705 packet[size++] = 0x0c; 2706 size++; // skip param len 2707 size++; // skip num handles 2708 2709 // add { handle, packets } entries 2710 btstack_linked_item_t * it; 2711 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2712 hci_connection_t * connection = (hci_connection_t *) it; 2713 if (connection->num_packets_completed){ 2714 little_endian_store_16(packet, size, connection->con_handle); 2715 size += 2; 2716 little_endian_store_16(packet, size, connection->num_packets_completed); 2717 size += 2; 2718 // 2719 num_handles++; 2720 connection->num_packets_completed = 0; 2721 } 2722 } 2723 2724 packet[2] = size - 3; 2725 packet[3] = num_handles; 2726 2727 hci_stack->host_completed_packets = 0; 2728 2729 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2730 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2731 2732 // release packet buffer for synchronous transport implementations 2733 if (hci_transport_synchronous()){ 2734 hci_stack->hci_packet_buffer_reserved = 0; 2735 } 2736 } 2737 #endif 2738 2739 static void hci_run(void){ 2740 2741 // log_info("hci_run: entered"); 2742 btstack_linked_item_t * it; 2743 2744 // send continuation fragments first, as they block the prepared packet buffer 2745 if (hci_stack->acl_fragmentation_total_size > 0) { 2746 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2747 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2748 if (connection) { 2749 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2750 hci_send_acl_packet_fragments(connection); 2751 return; 2752 } 2753 } else { 2754 // connection gone -> discard further fragments 2755 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2756 hci_stack->acl_fragmentation_total_size = 0; 2757 hci_stack->acl_fragmentation_pos = 0; 2758 } 2759 } 2760 2761 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2762 // send host num completed packets next as they don't require num_cmd_packets > 0 2763 if (!hci_can_send_comand_packet_transport()) return; 2764 if (hci_stack->host_completed_packets){ 2765 hci_host_num_completed_packets(); 2766 return; 2767 } 2768 #endif 2769 2770 if (!hci_can_send_command_packet_now()) return; 2771 2772 // global/non-connection oriented commands 2773 2774 #ifdef ENABLE_CLASSIC 2775 // decline incoming connections 2776 if (hci_stack->decline_reason){ 2777 uint8_t reason = hci_stack->decline_reason; 2778 hci_stack->decline_reason = 0; 2779 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2780 return; 2781 } 2782 // send scan enable 2783 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2784 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2785 hci_stack->new_scan_enable_value = 0xff; 2786 return; 2787 } 2788 // start/stop inquiry 2789 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2790 uint8_t duration = hci_stack->inquiry_state; 2791 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2792 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2793 return; 2794 } 2795 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2796 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2797 hci_send_cmd(&hci_inquiry_cancel); 2798 return; 2799 } 2800 #endif 2801 2802 #ifdef ENABLE_BLE 2803 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2804 if ((hci_stack->state == HCI_STATE_WORKING) 2805 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2806 2807 #ifdef ENABLE_LE_CENTRAL 2808 // handle le scan 2809 switch(hci_stack->le_scanning_state){ 2810 case LE_START_SCAN: 2811 hci_stack->le_scanning_state = LE_SCANNING; 2812 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2813 return; 2814 2815 case LE_STOP_SCAN: 2816 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2817 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2818 return; 2819 default: 2820 break; 2821 } 2822 if (hci_stack->le_scan_type != 0xff){ 2823 // defaults: active scanning, accept all advertisement packets 2824 int scan_type = hci_stack->le_scan_type; 2825 hci_stack->le_scan_type = 0xff; 2826 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 2827 return; 2828 } 2829 #endif 2830 #ifdef ENABLE_LE_PERIPHERAL 2831 // le advertisement control 2832 if (hci_stack->le_advertisements_todo){ 2833 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2834 } 2835 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2836 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2837 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2838 return; 2839 } 2840 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2841 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2842 hci_send_cmd(&hci_le_set_advertising_parameters, 2843 hci_stack->le_advertisements_interval_min, 2844 hci_stack->le_advertisements_interval_max, 2845 hci_stack->le_advertisements_type, 2846 hci_stack->le_own_addr_type, 2847 hci_stack->le_advertisements_direct_address_type, 2848 hci_stack->le_advertisements_direct_address, 2849 hci_stack->le_advertisements_channel_map, 2850 hci_stack->le_advertisements_filter_policy); 2851 return; 2852 } 2853 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2854 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2855 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2856 return; 2857 } 2858 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2859 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2860 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2861 hci_stack->le_scan_response_data); 2862 return; 2863 } 2864 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2865 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2866 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2867 return; 2868 } 2869 #endif 2870 2871 #ifdef ENABLE_LE_CENTRAL 2872 // 2873 // LE Whitelist Management 2874 // 2875 2876 // check if whitelist needs modification 2877 btstack_linked_list_iterator_t lit; 2878 int modification_pending = 0; 2879 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2880 while (btstack_linked_list_iterator_has_next(&lit)){ 2881 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2882 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2883 modification_pending = 1; 2884 break; 2885 } 2886 } 2887 2888 if (modification_pending){ 2889 // stop connnecting if modification pending 2890 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2891 hci_send_cmd(&hci_le_create_connection_cancel); 2892 return; 2893 } 2894 2895 // add/remove entries 2896 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2897 while (btstack_linked_list_iterator_has_next(&lit)){ 2898 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2899 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2900 entry->state = LE_WHITELIST_ON_CONTROLLER; 2901 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2902 return; 2903 2904 } 2905 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2906 bd_addr_t address; 2907 bd_addr_type_t address_type = entry->address_type; 2908 memcpy(address, entry->address, 6); 2909 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2910 btstack_memory_whitelist_entry_free(entry); 2911 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2912 return; 2913 } 2914 } 2915 } 2916 2917 // start connecting 2918 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2919 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2920 bd_addr_t null_addr; 2921 memset(null_addr, 0, 6); 2922 hci_send_cmd(&hci_le_create_connection, 2923 0x0060, // scan interval: 60 ms 2924 0x0030, // scan interval: 30 ms 2925 1, // use whitelist 2926 0, // peer address type 2927 null_addr, // peer bd addr 2928 hci_stack->le_own_addr_type, // our addr type: 2929 0x0008, // conn interval min 2930 0x0018, // conn interval max 2931 0, // conn latency 2932 0x0048, // supervision timeout 2933 0x0001, // min ce length 2934 0x0001 // max ce length 2935 ); 2936 return; 2937 } 2938 #endif 2939 } 2940 #endif 2941 2942 // send pending HCI commands 2943 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2944 hci_connection_t * connection = (hci_connection_t *) it; 2945 2946 switch(connection->state){ 2947 case SEND_CREATE_CONNECTION: 2948 switch(connection->address_type){ 2949 #ifdef ENABLE_CLASSIC 2950 case BD_ADDR_TYPE_CLASSIC: 2951 log_info("sending hci_create_connection"); 2952 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2953 break; 2954 #endif 2955 default: 2956 #ifdef ENABLE_BLE 2957 #ifdef ENABLE_LE_CENTRAL 2958 log_info("sending hci_le_create_connection"); 2959 hci_send_cmd(&hci_le_create_connection, 2960 0x0060, // scan interval: 60 ms 2961 0x0030, // scan interval: 30 ms 2962 0, // don't use whitelist 2963 connection->address_type, // peer address type 2964 connection->address, // peer bd addr 2965 hci_stack->le_own_addr_type, // our addr type: 2966 0x0008, // conn interval min 2967 0x0018, // conn interval max 2968 0, // conn latency 2969 0x0048, // supervision timeout 2970 0x0001, // min ce length 2971 0x0001 // max ce length 2972 ); 2973 2974 connection->state = SENT_CREATE_CONNECTION; 2975 #endif 2976 #endif 2977 break; 2978 } 2979 return; 2980 2981 #ifdef ENABLE_CLASSIC 2982 case RECEIVED_CONNECTION_REQUEST: 2983 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2984 connection->state = ACCEPTED_CONNECTION_REQUEST; 2985 connection->role = HCI_ROLE_SLAVE; 2986 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2987 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2988 } 2989 return; 2990 #endif 2991 2992 #ifdef ENABLE_BLE 2993 #ifdef ENABLE_LE_CENTRAL 2994 case SEND_CANCEL_CONNECTION: 2995 connection->state = SENT_CANCEL_CONNECTION; 2996 hci_send_cmd(&hci_le_create_connection_cancel); 2997 return; 2998 #endif 2999 #endif 3000 case SEND_DISCONNECT: 3001 connection->state = SENT_DISCONNECT; 3002 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3003 return; 3004 3005 default: 3006 break; 3007 } 3008 3009 #ifdef ENABLE_CLASSIC 3010 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3011 log_info("responding to link key request"); 3012 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3013 link_key_t link_key; 3014 link_key_type_t link_key_type; 3015 if ( hci_stack->link_key_db 3016 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3017 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3018 connection->link_key_type = link_key_type; 3019 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3020 } else { 3021 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3022 } 3023 return; 3024 } 3025 3026 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3027 log_info("denying to pin request"); 3028 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3029 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3030 return; 3031 } 3032 3033 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3034 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3035 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3036 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3037 // tweak authentication requirements 3038 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3039 if (connection->bonding_flags & BONDING_DEDICATED){ 3040 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3041 } 3042 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3043 authreq |= 1; 3044 } 3045 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3046 } else { 3047 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3048 } 3049 return; 3050 } 3051 3052 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3053 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3054 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3055 return; 3056 } 3057 3058 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3059 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3060 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3061 return; 3062 } 3063 3064 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3065 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3066 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3067 return; 3068 } 3069 3070 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3071 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3072 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3073 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3074 return; 3075 } 3076 3077 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3078 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3079 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3080 return; 3081 } 3082 3083 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3084 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3085 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3086 return; 3087 } 3088 #endif 3089 3090 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3091 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3092 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3093 return; 3094 } 3095 3096 #ifdef ENABLE_BLE 3097 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3098 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3099 3100 uint16_t connection_interval_min = connection->le_conn_interval_min; 3101 connection->le_conn_interval_min = 0; 3102 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3103 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3104 0x0000, 0xffff); 3105 } 3106 #endif 3107 } 3108 3109 hci_connection_t * connection; 3110 switch (hci_stack->state){ 3111 case HCI_STATE_INITIALIZING: 3112 hci_initializing_run(); 3113 break; 3114 3115 case HCI_STATE_HALTING: 3116 3117 log_info("HCI_STATE_HALTING"); 3118 3119 // free whitelist entries 3120 #ifdef ENABLE_BLE 3121 #ifdef ENABLE_LE_CENTRAL 3122 { 3123 btstack_linked_list_iterator_t lit; 3124 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3125 while (btstack_linked_list_iterator_has_next(&lit)){ 3126 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3127 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3128 btstack_memory_whitelist_entry_free(entry); 3129 } 3130 } 3131 #endif 3132 #endif 3133 // close all open connections 3134 connection = (hci_connection_t *) hci_stack->connections; 3135 if (connection){ 3136 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3137 if (!hci_can_send_command_packet_now()) return; 3138 3139 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3140 3141 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3142 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3143 3144 // ... which would be ignored anyway as we shutdown (free) the connection now 3145 hci_shutdown_connection(connection); 3146 3147 // finally, send the disconnect command 3148 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3149 return; 3150 } 3151 log_info("HCI_STATE_HALTING, calling off"); 3152 3153 // switch mode 3154 hci_power_control_off(); 3155 3156 log_info("HCI_STATE_HALTING, emitting state"); 3157 hci_emit_state(); 3158 log_info("HCI_STATE_HALTING, done"); 3159 break; 3160 3161 case HCI_STATE_FALLING_ASLEEP: 3162 switch(hci_stack->substate) { 3163 case HCI_FALLING_ASLEEP_DISCONNECT: 3164 log_info("HCI_STATE_FALLING_ASLEEP"); 3165 // close all open connections 3166 connection = (hci_connection_t *) hci_stack->connections; 3167 3168 #ifdef HAVE_PLATFORM_IPHONE_OS 3169 // don't close connections, if H4 supports power management 3170 if (btstack_control_iphone_power_management_enabled()){ 3171 connection = NULL; 3172 } 3173 #endif 3174 if (connection){ 3175 3176 // send disconnect 3177 if (!hci_can_send_command_packet_now()) return; 3178 3179 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3180 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3181 3182 // send disconnected event right away - causes higher layer connections to get closed, too. 3183 hci_shutdown_connection(connection); 3184 return; 3185 } 3186 3187 if (hci_classic_supported()){ 3188 // disable page and inquiry scan 3189 if (!hci_can_send_command_packet_now()) return; 3190 3191 log_info("HCI_STATE_HALTING, disabling inq scans"); 3192 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3193 3194 // continue in next sub state 3195 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3196 break; 3197 } 3198 // no break - fall through for ble-only chips 3199 3200 case HCI_FALLING_ASLEEP_COMPLETE: 3201 log_info("HCI_STATE_HALTING, calling sleep"); 3202 #ifdef HAVE_PLATFORM_IPHONE_OS 3203 // don't actually go to sleep, if H4 supports power management 3204 if (btstack_control_iphone_power_management_enabled()){ 3205 // SLEEP MODE reached 3206 hci_stack->state = HCI_STATE_SLEEPING; 3207 hci_emit_state(); 3208 break; 3209 } 3210 #endif 3211 // switch mode 3212 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3213 hci_emit_state(); 3214 break; 3215 3216 default: 3217 break; 3218 } 3219 break; 3220 3221 default: 3222 break; 3223 } 3224 } 3225 3226 int hci_send_cmd_packet(uint8_t *packet, int size){ 3227 // house-keeping 3228 3229 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3230 hci_stack->loopback_mode = packet[3]; 3231 } 3232 3233 #ifdef ENABLE_CLASSIC 3234 bd_addr_t addr; 3235 hci_connection_t * conn; 3236 3237 // create_connection? 3238 if (IS_COMMAND(packet, hci_create_connection)){ 3239 reverse_bd_addr(&packet[3], addr); 3240 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3241 3242 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3243 if (!conn){ 3244 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3245 if (!conn){ 3246 // notify client that alloc failed 3247 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3248 return 0; // don't sent packet to controller 3249 } 3250 conn->state = SEND_CREATE_CONNECTION; 3251 } 3252 log_info("conn state %u", conn->state); 3253 switch (conn->state){ 3254 // if connection active exists 3255 case OPEN: 3256 // and OPEN, emit connection complete command, don't send to controller 3257 hci_emit_connection_complete(addr, conn->con_handle, 0); 3258 return 0; 3259 case SEND_CREATE_CONNECTION: 3260 // connection created by hci, e.g. dedicated bonding 3261 break; 3262 default: 3263 // otherwise, just ignore as it is already in the open process 3264 return 0; 3265 } 3266 conn->state = SENT_CREATE_CONNECTION; 3267 } 3268 3269 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3270 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3271 } 3272 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3273 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3274 } 3275 3276 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3277 if (hci_stack->link_key_db){ 3278 reverse_bd_addr(&packet[3], addr); 3279 hci_stack->link_key_db->delete_link_key(addr); 3280 } 3281 } 3282 3283 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3284 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3285 reverse_bd_addr(&packet[3], addr); 3286 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3287 if (conn){ 3288 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3289 } 3290 } 3291 3292 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3293 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3294 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3295 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3296 reverse_bd_addr(&packet[3], addr); 3297 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3298 if (conn){ 3299 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3300 } 3301 } 3302 3303 #ifdef ENABLE_SCO_OVER_HCI 3304 // setup_synchronous_connection? Voice setting at offset 22 3305 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3306 // TODO: compare to current setting if sco connection already active 3307 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3308 } 3309 // accept_synchronus_connection? Voice setting at offset 18 3310 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3311 // TODO: compare to current setting if sco connection already active 3312 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3313 } 3314 #endif 3315 #endif 3316 3317 #ifdef ENABLE_BLE 3318 #ifdef ENABLE_LE_PERIPHERAL 3319 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3320 hci_stack->le_random_address_set = 1; 3321 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3322 } 3323 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3324 hci_stack->le_advertisements_active = packet[3]; 3325 } 3326 #endif 3327 #ifdef ENABLE_LE_CENTRAL 3328 if (IS_COMMAND(packet, hci_le_create_connection)){ 3329 // white list used? 3330 uint8_t initiator_filter_policy = packet[7]; 3331 switch (initiator_filter_policy){ 3332 case 0: 3333 // whitelist not used 3334 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3335 break; 3336 case 1: 3337 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3338 break; 3339 default: 3340 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3341 break; 3342 } 3343 } 3344 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3345 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3346 } 3347 #endif 3348 #endif 3349 3350 hci_stack->num_cmd_packets--; 3351 3352 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3353 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3354 3355 // release packet buffer for synchronous transport implementations 3356 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3357 hci_stack->hci_packet_buffer_reserved = 0; 3358 } 3359 3360 return err; 3361 } 3362 3363 // disconnect because of security block 3364 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3365 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3366 if (!connection) return; 3367 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3368 } 3369 3370 3371 // Configure Secure Simple Pairing 3372 3373 #ifdef ENABLE_CLASSIC 3374 3375 // enable will enable SSP during init 3376 void gap_ssp_set_enable(int enable){ 3377 hci_stack->ssp_enable = enable; 3378 } 3379 3380 static int hci_local_ssp_activated(void){ 3381 return gap_ssp_supported() && hci_stack->ssp_enable; 3382 } 3383 3384 // if set, BTstack will respond to io capability request using authentication requirement 3385 void gap_ssp_set_io_capability(int io_capability){ 3386 hci_stack->ssp_io_capability = io_capability; 3387 } 3388 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3389 hci_stack->ssp_authentication_requirement = authentication_requirement; 3390 } 3391 3392 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3393 void gap_ssp_set_auto_accept(int auto_accept){ 3394 hci_stack->ssp_auto_accept = auto_accept; 3395 } 3396 #endif 3397 3398 // va_list part of hci_send_cmd 3399 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3400 if (!hci_can_send_command_packet_now()){ 3401 log_error("hci_send_cmd called but cannot send packet now"); 3402 return 0; 3403 } 3404 3405 // for HCI INITIALIZATION 3406 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3407 hci_stack->last_cmd_opcode = cmd->opcode; 3408 3409 hci_reserve_packet_buffer(); 3410 uint8_t * packet = hci_stack->hci_packet_buffer; 3411 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3412 return hci_send_cmd_packet(packet, size); 3413 } 3414 3415 /** 3416 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3417 */ 3418 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3419 va_list argptr; 3420 va_start(argptr, cmd); 3421 int res = hci_send_cmd_va_arg(cmd, argptr); 3422 va_end(argptr); 3423 return res; 3424 } 3425 3426 // Create various non-HCI events. 3427 // TODO: generalize, use table similar to hci_create_command 3428 3429 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3430 // dump packet 3431 if (dump) { 3432 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3433 } 3434 3435 // dispatch to all event handlers 3436 btstack_linked_list_iterator_t it; 3437 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3438 while (btstack_linked_list_iterator_has_next(&it)){ 3439 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3440 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3441 } 3442 } 3443 3444 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3445 if (!hci_stack->acl_packet_handler) return; 3446 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3447 } 3448 3449 #ifdef ENABLE_CLASSIC 3450 static void hci_notify_if_sco_can_send_now(void){ 3451 // notify SCO sender if waiting 3452 if (!hci_stack->sco_waiting_for_can_send_now) return; 3453 if (hci_can_send_sco_packet_now()){ 3454 hci_stack->sco_waiting_for_can_send_now = 0; 3455 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3456 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3457 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3458 } 3459 } 3460 3461 // parsing end emitting has been merged to reduce code size 3462 static void gap_inquiry_explode(uint8_t * packet){ 3463 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3464 3465 uint8_t * eir_data; 3466 ad_context_t context; 3467 const uint8_t * name; 3468 uint8_t name_len; 3469 3470 int event_type = hci_event_packet_get_type(packet); 3471 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3472 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3473 3474 // event[1] is set at the end 3475 int i; 3476 for (i=0; i<num_responses;i++){ 3477 memset(event, 0, sizeof(event)); 3478 event[0] = GAP_EVENT_INQUIRY_RESULT; 3479 uint8_t event_size = 18; // if name is not set by EIR 3480 3481 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3482 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3483 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3484 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3485 3486 switch (event_type){ 3487 case HCI_EVENT_INQUIRY_RESULT: 3488 // 14,15,16,17 = 0, size 18 3489 break; 3490 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3491 event[14] = 1; 3492 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3493 // 16,17 = 0, size 18 3494 break; 3495 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3496 event[14] = 1; 3497 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3498 // for EIR packets, there is only one reponse in it 3499 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3500 name = NULL; 3501 // EIR data is 240 bytes in EIR event 3502 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3503 uint8_t data_type = ad_iterator_get_data_type(&context); 3504 uint8_t data_size = ad_iterator_get_data_len(&context); 3505 const uint8_t * data = ad_iterator_get_data(&context); 3506 // Prefer Complete Local Name over Shortend Local Name 3507 switch (data_type){ 3508 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3509 if (name) continue; 3510 /* explicit fall-through */ 3511 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3512 name = data; 3513 name_len = data_size; 3514 break; 3515 default: 3516 break; 3517 } 3518 } 3519 if (name){ 3520 event[16] = 1; 3521 // truncate name if needed 3522 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3523 event[17] = len; 3524 memcpy(&event[18], name, len); 3525 event_size += len; 3526 } 3527 break; 3528 } 3529 event[1] = event_size - 2; 3530 hci_emit_event(event, event_size, 1); 3531 } 3532 } 3533 #endif 3534 3535 void hci_emit_state(void){ 3536 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3537 uint8_t event[3]; 3538 event[0] = BTSTACK_EVENT_STATE; 3539 event[1] = sizeof(event) - 2; 3540 event[2] = hci_stack->state; 3541 hci_emit_event(event, sizeof(event), 1); 3542 } 3543 3544 #ifdef ENABLE_CLASSIC 3545 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3546 uint8_t event[13]; 3547 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3548 event[1] = sizeof(event) - 2; 3549 event[2] = status; 3550 little_endian_store_16(event, 3, con_handle); 3551 reverse_bd_addr(address, &event[5]); 3552 event[11] = 1; // ACL connection 3553 event[12] = 0; // encryption disabled 3554 hci_emit_event(event, sizeof(event), 1); 3555 } 3556 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3557 if (disable_l2cap_timeouts) return; 3558 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3559 uint8_t event[4]; 3560 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3561 event[1] = sizeof(event) - 2; 3562 little_endian_store_16(event, 2, conn->con_handle); 3563 hci_emit_event(event, sizeof(event), 1); 3564 } 3565 #endif 3566 3567 #ifdef ENABLE_BLE 3568 #ifdef ENABLE_LE_CENTRAL 3569 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3570 uint8_t event[21]; 3571 event[0] = HCI_EVENT_LE_META; 3572 event[1] = sizeof(event) - 2; 3573 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3574 event[3] = status; 3575 little_endian_store_16(event, 4, con_handle); 3576 event[6] = 0; // TODO: role 3577 event[7] = address_type; 3578 reverse_bd_addr(address, &event[8]); 3579 little_endian_store_16(event, 14, 0); // interval 3580 little_endian_store_16(event, 16, 0); // latency 3581 little_endian_store_16(event, 18, 0); // supervision timeout 3582 event[20] = 0; // master clock accuracy 3583 hci_emit_event(event, sizeof(event), 1); 3584 } 3585 #endif 3586 #endif 3587 3588 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3589 uint8_t event[6]; 3590 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3591 event[1] = sizeof(event) - 2; 3592 event[2] = 0; // status = OK 3593 little_endian_store_16(event, 3, con_handle); 3594 event[5] = reason; 3595 hci_emit_event(event, sizeof(event), 1); 3596 } 3597 3598 static void hci_emit_nr_connections_changed(void){ 3599 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3600 uint8_t event[3]; 3601 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3602 event[1] = sizeof(event) - 2; 3603 event[2] = nr_hci_connections(); 3604 hci_emit_event(event, sizeof(event), 1); 3605 } 3606 3607 static void hci_emit_hci_open_failed(void){ 3608 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3609 uint8_t event[2]; 3610 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3611 event[1] = sizeof(event) - 2; 3612 hci_emit_event(event, sizeof(event), 1); 3613 } 3614 3615 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3616 log_info("hci_emit_dedicated_bonding_result %u ", status); 3617 uint8_t event[9]; 3618 int pos = 0; 3619 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3620 event[pos++] = sizeof(event) - 2; 3621 event[pos++] = status; 3622 reverse_bd_addr(address, &event[pos]); 3623 hci_emit_event(event, sizeof(event), 1); 3624 } 3625 3626 3627 #ifdef ENABLE_CLASSIC 3628 3629 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3630 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3631 uint8_t event[5]; 3632 int pos = 0; 3633 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3634 event[pos++] = sizeof(event) - 2; 3635 little_endian_store_16(event, 2, con_handle); 3636 pos += 2; 3637 event[pos++] = level; 3638 hci_emit_event(event, sizeof(event), 1); 3639 } 3640 3641 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3642 if (!connection) return LEVEL_0; 3643 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3644 return gap_security_level_for_link_key_type(connection->link_key_type); 3645 } 3646 3647 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3648 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3649 uint8_t event[3]; 3650 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3651 event[1] = sizeof(event) - 2; 3652 event[2] = enabled; 3653 hci_emit_event(event, sizeof(event), 1); 3654 } 3655 3656 #ifdef ENABLE_CLASSIC 3657 // query if remote side supports eSCO 3658 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3659 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3660 if (!connection) return 0; 3661 return connection->remote_supported_feature_eSCO; 3662 } 3663 3664 // query if remote side supports SSP 3665 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3666 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3667 if (!connection) return 0; 3668 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3669 } 3670 3671 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3672 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3673 } 3674 #endif 3675 3676 // GAP API 3677 /** 3678 * @bbrief enable/disable bonding. default is enabled 3679 * @praram enabled 3680 */ 3681 void gap_set_bondable_mode(int enable){ 3682 hci_stack->bondable = enable ? 1 : 0; 3683 } 3684 /** 3685 * @brief Get bondable mode. 3686 * @return 1 if bondable 3687 */ 3688 int gap_get_bondable_mode(void){ 3689 return hci_stack->bondable; 3690 } 3691 3692 /** 3693 * @brief map link keys to security levels 3694 */ 3695 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3696 switch (link_key_type){ 3697 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3698 return LEVEL_4; 3699 case COMBINATION_KEY: 3700 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3701 return LEVEL_3; 3702 default: 3703 return LEVEL_2; 3704 } 3705 } 3706 3707 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3708 log_info("gap_mitm_protection_required_for_security_level %u", level); 3709 return level > LEVEL_2; 3710 } 3711 3712 /** 3713 * @brief get current security level 3714 */ 3715 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3716 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3717 if (!connection) return LEVEL_0; 3718 return gap_security_level_for_connection(connection); 3719 } 3720 3721 /** 3722 * @brief request connection to device to 3723 * @result GAP_AUTHENTICATION_RESULT 3724 */ 3725 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3726 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3727 if (!connection){ 3728 hci_emit_security_level(con_handle, LEVEL_0); 3729 return; 3730 } 3731 gap_security_level_t current_level = gap_security_level(con_handle); 3732 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3733 if (current_level >= requested_level){ 3734 hci_emit_security_level(con_handle, current_level); 3735 return; 3736 } 3737 3738 connection->requested_security_level = requested_level; 3739 3740 #if 0 3741 // sending encryption request without a link key results in an error. 3742 // TODO: figure out how to use it properly 3743 3744 // would enabling ecnryption suffice (>= LEVEL_2)? 3745 if (hci_stack->link_key_db){ 3746 link_key_type_t link_key_type; 3747 link_key_t link_key; 3748 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3749 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3750 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3751 return; 3752 } 3753 } 3754 } 3755 #endif 3756 3757 // try to authenticate connection 3758 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3759 hci_run(); 3760 } 3761 3762 /** 3763 * @brief start dedicated bonding with device. disconnect after bonding 3764 * @param device 3765 * @param request MITM protection 3766 * @result GAP_DEDICATED_BONDING_COMPLETE 3767 */ 3768 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3769 3770 // create connection state machine 3771 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3772 3773 if (!connection){ 3774 return BTSTACK_MEMORY_ALLOC_FAILED; 3775 } 3776 3777 // delete linkn key 3778 gap_drop_link_key_for_bd_addr(device); 3779 3780 // configure LEVEL_2/3, dedicated bonding 3781 connection->state = SEND_CREATE_CONNECTION; 3782 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3783 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3784 connection->bonding_flags = BONDING_DEDICATED; 3785 3786 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3787 3788 // handle: connnection failure (connection complete != ok) 3789 // handle: authentication failure 3790 // handle: disconnect on done 3791 3792 hci_run(); 3793 3794 return 0; 3795 } 3796 #endif 3797 3798 void gap_set_local_name(const char * local_name){ 3799 hci_stack->local_name = local_name; 3800 } 3801 3802 3803 #ifdef ENABLE_BLE 3804 3805 #ifdef ENABLE_LE_CENTRAL 3806 void gap_start_scan(void){ 3807 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3808 hci_stack->le_scanning_state = LE_START_SCAN; 3809 hci_run(); 3810 } 3811 3812 void gap_stop_scan(void){ 3813 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3814 hci_stack->le_scanning_state = LE_STOP_SCAN; 3815 hci_run(); 3816 } 3817 3818 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3819 hci_stack->le_scan_type = scan_type; 3820 hci_stack->le_scan_interval = scan_interval; 3821 hci_stack->le_scan_window = scan_window; 3822 hci_run(); 3823 } 3824 3825 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3826 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3827 if (!conn){ 3828 log_info("gap_connect: no connection exists yet, creating context"); 3829 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3830 if (!conn){ 3831 // notify client that alloc failed 3832 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3833 log_info("gap_connect: failed to alloc hci_connection_t"); 3834 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3835 } 3836 conn->state = SEND_CREATE_CONNECTION; 3837 log_info("gap_connect: send create connection next"); 3838 hci_run(); 3839 return 0; 3840 } 3841 3842 if (!hci_is_le_connection(conn) || 3843 conn->state == SEND_CREATE_CONNECTION || 3844 conn->state == SENT_CREATE_CONNECTION) { 3845 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3846 log_error("gap_connect: classic connection or connect is already being created"); 3847 return GATT_CLIENT_IN_WRONG_STATE; 3848 } 3849 3850 log_info("gap_connect: context exists with state %u", conn->state); 3851 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3852 hci_run(); 3853 return 0; 3854 } 3855 3856 // @assumption: only a single outgoing LE Connection exists 3857 static hci_connection_t * gap_get_outgoing_connection(void){ 3858 btstack_linked_item_t *it; 3859 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3860 hci_connection_t * conn = (hci_connection_t *) it; 3861 if (!hci_is_le_connection(conn)) continue; 3862 switch (conn->state){ 3863 case SEND_CREATE_CONNECTION: 3864 case SENT_CREATE_CONNECTION: 3865 return conn; 3866 default: 3867 break; 3868 }; 3869 } 3870 return NULL; 3871 } 3872 3873 uint8_t gap_connect_cancel(void){ 3874 hci_connection_t * conn = gap_get_outgoing_connection(); 3875 if (!conn) return 0; 3876 switch (conn->state){ 3877 case SEND_CREATE_CONNECTION: 3878 // skip sending create connection and emit event instead 3879 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3880 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3881 btstack_memory_hci_connection_free( conn ); 3882 break; 3883 case SENT_CREATE_CONNECTION: 3884 // request to send cancel connection 3885 conn->state = SEND_CANCEL_CONNECTION; 3886 hci_run(); 3887 break; 3888 default: 3889 break; 3890 } 3891 return 0; 3892 } 3893 #endif 3894 3895 /** 3896 * @brief Updates the connection parameters for a given LE connection 3897 * @param handle 3898 * @param conn_interval_min (unit: 1.25ms) 3899 * @param conn_interval_max (unit: 1.25ms) 3900 * @param conn_latency 3901 * @param supervision_timeout (unit: 10ms) 3902 * @returns 0 if ok 3903 */ 3904 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3905 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3906 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3907 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3908 connection->le_conn_interval_min = conn_interval_min; 3909 connection->le_conn_interval_max = conn_interval_max; 3910 connection->le_conn_latency = conn_latency; 3911 connection->le_supervision_timeout = supervision_timeout; 3912 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3913 hci_run(); 3914 return 0; 3915 } 3916 3917 /** 3918 * @brief Request an update of the connection parameter for a given LE connection 3919 * @param handle 3920 * @param conn_interval_min (unit: 1.25ms) 3921 * @param conn_interval_max (unit: 1.25ms) 3922 * @param conn_latency 3923 * @param supervision_timeout (unit: 10ms) 3924 * @returns 0 if ok 3925 */ 3926 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3927 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3928 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3929 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3930 connection->le_conn_interval_min = conn_interval_min; 3931 connection->le_conn_interval_max = conn_interval_max; 3932 connection->le_conn_latency = conn_latency; 3933 connection->le_supervision_timeout = supervision_timeout; 3934 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3935 hci_run(); 3936 return 0; 3937 } 3938 3939 #ifdef ENABLE_LE_PERIPHERAL 3940 3941 static void gap_advertisments_changed(void){ 3942 // disable advertisements before updating adv, scan data, or adv params 3943 if (hci_stack->le_advertisements_active){ 3944 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3945 } 3946 hci_run(); 3947 } 3948 3949 /** 3950 * @brief Set Advertisement Data 3951 * @param advertising_data_length 3952 * @param advertising_data (max 31 octets) 3953 * @note data is not copied, pointer has to stay valid 3954 */ 3955 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3956 hci_stack->le_advertisements_data_len = advertising_data_length; 3957 hci_stack->le_advertisements_data = advertising_data; 3958 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3959 gap_advertisments_changed(); 3960 } 3961 3962 /** 3963 * @brief Set Scan Response Data 3964 * @param advertising_data_length 3965 * @param advertising_data (max 31 octets) 3966 * @note data is not copied, pointer has to stay valid 3967 */ 3968 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3969 hci_stack->le_scan_response_data_len = scan_response_data_length; 3970 hci_stack->le_scan_response_data = scan_response_data; 3971 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3972 gap_advertisments_changed(); 3973 } 3974 3975 /** 3976 * @brief Set Advertisement Parameters 3977 * @param adv_int_min 3978 * @param adv_int_max 3979 * @param adv_type 3980 * @param direct_address_type 3981 * @param direct_address 3982 * @param channel_map 3983 * @param filter_policy 3984 * 3985 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3986 */ 3987 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3988 uint8_t direct_address_typ, bd_addr_t direct_address, 3989 uint8_t channel_map, uint8_t filter_policy) { 3990 3991 hci_stack->le_advertisements_interval_min = adv_int_min; 3992 hci_stack->le_advertisements_interval_max = adv_int_max; 3993 hci_stack->le_advertisements_type = adv_type; 3994 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3995 hci_stack->le_advertisements_channel_map = channel_map; 3996 hci_stack->le_advertisements_filter_policy = filter_policy; 3997 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3998 3999 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4000 gap_advertisments_changed(); 4001 } 4002 4003 /** 4004 * @brief Enable/Disable Advertisements 4005 * @param enabled 4006 */ 4007 void gap_advertisements_enable(int enabled){ 4008 hci_stack->le_advertisements_enabled = enabled; 4009 if (enabled && !hci_stack->le_advertisements_active){ 4010 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4011 } 4012 if (!enabled && hci_stack->le_advertisements_active){ 4013 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4014 } 4015 hci_run(); 4016 } 4017 4018 #endif 4019 4020 void hci_le_set_own_address_type(uint8_t own_address_type){ 4021 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4022 if (own_address_type == hci_stack->le_own_addr_type) return; 4023 hci_stack->le_own_addr_type = own_address_type; 4024 4025 #ifdef ENABLE_LE_PERIPHERAL 4026 // update advertisement parameters, too 4027 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4028 gap_advertisments_changed(); 4029 #endif 4030 #ifdef ENABLE_LE_CENTRAL 4031 // note: we don't update scan parameters or modify ongoing connection attempts 4032 #endif 4033 } 4034 4035 #endif 4036 4037 uint8_t gap_disconnect(hci_con_handle_t handle){ 4038 hci_connection_t * conn = hci_connection_for_handle(handle); 4039 if (!conn){ 4040 hci_emit_disconnection_complete(handle, 0); 4041 return 0; 4042 } 4043 conn->state = SEND_DISCONNECT; 4044 hci_run(); 4045 return 0; 4046 } 4047 4048 /** 4049 * @brief Get connection type 4050 * @param con_handle 4051 * @result connection_type 4052 */ 4053 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4054 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4055 if (!conn) return GAP_CONNECTION_INVALID; 4056 switch (conn->address_type){ 4057 case BD_ADDR_TYPE_LE_PUBLIC: 4058 case BD_ADDR_TYPE_LE_RANDOM: 4059 return GAP_CONNECTION_LE; 4060 case BD_ADDR_TYPE_SCO: 4061 return GAP_CONNECTION_SCO; 4062 case BD_ADDR_TYPE_CLASSIC: 4063 return GAP_CONNECTION_ACL; 4064 default: 4065 return GAP_CONNECTION_INVALID; 4066 } 4067 } 4068 4069 #ifdef ENABLE_BLE 4070 4071 #ifdef ENABLE_LE_CENTRAL 4072 /** 4073 * @brief Auto Connection Establishment - Start Connecting to device 4074 * @param address_typ 4075 * @param address 4076 * @returns 0 if ok 4077 */ 4078 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4079 // check capacity 4080 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4081 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4082 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4083 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4084 entry->address_type = address_type; 4085 memcpy(entry->address, address, 6); 4086 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4087 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4088 hci_run(); 4089 return 0; 4090 } 4091 4092 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4093 btstack_linked_list_iterator_t it; 4094 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4095 while (btstack_linked_list_iterator_has_next(&it)){ 4096 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4097 if (entry->address_type != address_type) continue; 4098 if (memcmp(entry->address, address, 6) != 0) continue; 4099 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4100 // remove from controller if already present 4101 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4102 continue; 4103 } 4104 // direclty remove entry from whitelist 4105 btstack_linked_list_iterator_remove(&it); 4106 btstack_memory_whitelist_entry_free(entry); 4107 } 4108 } 4109 4110 /** 4111 * @brief Auto Connection Establishment - Stop Connecting to device 4112 * @param address_typ 4113 * @param address 4114 * @returns 0 if ok 4115 */ 4116 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4117 hci_remove_from_whitelist(address_type, address); 4118 hci_run(); 4119 return 0; 4120 } 4121 4122 /** 4123 * @brief Auto Connection Establishment - Stop everything 4124 * @note Convenience function to stop all active auto connection attempts 4125 */ 4126 void gap_auto_connection_stop_all(void){ 4127 btstack_linked_list_iterator_t it; 4128 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4129 while (btstack_linked_list_iterator_has_next(&it)){ 4130 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4131 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4132 // remove from controller if already present 4133 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4134 continue; 4135 } 4136 // directly remove entry from whitelist 4137 btstack_linked_list_iterator_remove(&it); 4138 btstack_memory_whitelist_entry_free(entry); 4139 } 4140 hci_run(); 4141 } 4142 #endif 4143 #endif 4144 4145 #ifdef ENABLE_CLASSIC 4146 /** 4147 * @brief Set Extended Inquiry Response data 4148 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4149 * @note has to be done before stack starts up 4150 */ 4151 void gap_set_extended_inquiry_response(const uint8_t * data){ 4152 hci_stack->eir_data = data; 4153 } 4154 4155 /** 4156 * @brief Start GAP Classic Inquiry 4157 * @param duration in 1.28s units 4158 * @return 0 if ok 4159 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4160 */ 4161 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4162 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4163 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4164 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4165 } 4166 hci_stack->inquiry_state = duration_in_1280ms_units; 4167 hci_run(); 4168 return 0; 4169 } 4170 4171 /** 4172 * @brief Stop GAP Classic Inquiry 4173 * @returns 0 if ok 4174 */ 4175 int gap_inquiry_stop(void){ 4176 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4177 // emit inquiry complete event, before it even started 4178 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4179 hci_emit_event(event, sizeof(event), 1); 4180 return 0; 4181 } 4182 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4183 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4184 hci_run(); 4185 return 0; 4186 } 4187 4188 /** 4189 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4190 * @param inquiry_mode see bluetooth_defines.h 4191 */ 4192 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4193 hci_stack->inquiry_mode = mode; 4194 } 4195 4196 /** 4197 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4198 */ 4199 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4200 hci_stack->sco_voice_setting = voice_setting; 4201 } 4202 4203 /** 4204 * @brief Get SCO Voice Setting 4205 * @return current voice setting 4206 */ 4207 uint16_t hci_get_sco_voice_setting(void){ 4208 return hci_stack->sco_voice_setting; 4209 } 4210 4211 /** @brief Get SCO packet length for current SCO Voice setting 4212 * @note Using SCO packets of the exact length is required for USB transfer 4213 * @return Length of SCO packets in bytes (not audio frames) 4214 */ 4215 int hci_get_sco_packet_length(void){ 4216 // see Core Spec for H2 USB Transfer. 4217 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4218 return 27; 4219 } 4220 #endif 4221 4222 /** 4223 * @brief Set callback for Bluetooth Hardware Error 4224 */ 4225 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4226 hci_stack->hardware_error_callback = fn; 4227 } 4228 4229 void hci_disconnect_all(void){ 4230 btstack_linked_list_iterator_t it; 4231 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4232 while (btstack_linked_list_iterator_has_next(&it)){ 4233 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4234 if (con->state == SENT_DISCONNECT) continue; 4235 con->state = SEND_DISCONNECT; 4236 } 4237 hci_run(); 4238 } 4239 4240 uint16_t hci_get_manufacturer(void){ 4241 return hci_stack->manufacturer; 4242 } 4243