1 /* 2 * Copyright (C) 2021 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__ "hids_client.c" 39 40 #include "btstack_config.h" 41 42 #ifdef ENABLE_TESTING_SUPPORT 43 #include <stdio.h> 44 #endif 45 46 #include <stdint.h> 47 #include <string.h> 48 49 #include "ble/gatt-service/hids_client.h" 50 51 #include "btstack_memory.h" 52 #include "ble/att_db.h" 53 #include "ble/core.h" 54 #include "ble/gatt_client.h" 55 #include "ble/sm.h" 56 #include "bluetooth_gatt.h" 57 #include "btstack_debug.h" 58 #include "btstack_event.h" 59 #include "btstack_run_loop.h" 60 #include "gap.h" 61 62 #define HID_REPORT_MODE_REPORT_ID 3 63 #define HID_REPORT_MODE_REPORT_MAP_ID 4 64 #define HID_REPORT_MODE_HID_INFORMATION_ID 5 65 #define HID_REPORT_MODE_HID_CONTROL_POINT_ID 6 66 67 static btstack_linked_list_t clients; 68 static uint16_t hids_cid_counter = 0; 69 70 static uint8_t * hids_client_descriptor_storage; 71 static uint16_t hids_client_descriptor_storage_len; 72 73 static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 74 75 #ifdef ENABLE_TESTING_SUPPORT 76 static char * hid_characteristic_name(uint16_t uuid){ 77 switch (uuid){ 78 case ORG_BLUETOOTH_CHARACTERISTIC_PROTOCOL_MODE: 79 return "PROTOCOL_MODE"; 80 81 case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT: 82 return "BOOT_KEYBOARD_INPUT_REPORT"; 83 84 case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT: 85 return "BOOT_MOUSE_INPUT_REPORT"; 86 87 case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_OUTPUT_REPORT: 88 return "BOOT_KEYBOARD_OUTPUT_REPORT"; 89 90 case ORG_BLUETOOTH_CHARACTERISTIC_REPORT: 91 return "REPORT"; 92 93 case ORG_BLUETOOTH_CHARACTERISTIC_REPORT_MAP: 94 return "REPORT_MAP"; 95 96 case ORG_BLUETOOTH_CHARACTERISTIC_HID_INFORMATION: 97 return "HID_INFORMATION"; 98 99 case ORG_BLUETOOTH_CHARACTERISTIC_HID_CONTROL_POINT: 100 return "HID_CONTROL_POINT"; 101 default: 102 return "UKNOWN"; 103 } 104 } 105 #endif 106 107 static hids_client_t * hids_get_client_for_con_handle(hci_con_handle_t con_handle){ 108 btstack_linked_list_iterator_t it; 109 btstack_linked_list_iterator_init(&it, &clients); 110 while (btstack_linked_list_iterator_has_next(&it)){ 111 hids_client_t * client = (hids_client_t *)btstack_linked_list_iterator_next(&it); 112 if (client->con_handle != con_handle) continue; 113 return client; 114 } 115 return NULL; 116 } 117 118 static hids_client_t * hids_get_client_for_cid(uint16_t hids_cid){ 119 btstack_linked_list_iterator_t it; 120 btstack_linked_list_iterator_init(&it, &clients); 121 while (btstack_linked_list_iterator_has_next(&it)){ 122 hids_client_t * client = (hids_client_t *)btstack_linked_list_iterator_next(&it); 123 if (client->cid != hids_cid) continue; 124 return client; 125 } 126 return NULL; 127 } 128 129 130 // START Descriptor Storage Util 131 132 static uint16_t hids_client_descriptor_storage_get_available_space(void){ 133 // assumes all descriptors are back to back 134 uint16_t free_space = hids_client_descriptor_storage_len; 135 uint8_t i; 136 137 btstack_linked_list_iterator_t it; 138 btstack_linked_list_iterator_init(&it, &clients); 139 while (btstack_linked_list_iterator_has_next(&it)){ 140 hids_client_t * client = (hids_client_t *)btstack_linked_list_iterator_next(&it); 141 for (i = 0; i < client->num_instances; i++){ 142 free_space -= client->services[i].hid_descriptor_len; 143 } 144 } 145 return free_space; 146 } 147 148 static void hids_client_descriptor_storage_init(hids_client_t * client, uint8_t service_index){ 149 client->services[service_index].hid_descriptor_len = 0; 150 client->services[service_index].hid_descriptor_max_len = hids_client_descriptor_storage_get_available_space(); 151 client->services[service_index].hid_descriptor_offset = hids_client_descriptor_storage_len - client->services[service_index].hid_descriptor_max_len; 152 } 153 154 static bool hids_client_descriptor_storage_store(hids_client_t * client, uint8_t service_index, uint8_t byte){ 155 if (client->services[service_index].hid_descriptor_len >= client->services[service_index].hid_descriptor_max_len) return false; 156 157 hids_client_descriptor_storage[client->services[service_index].hid_descriptor_offset + client->services[service_index].hid_descriptor_len] = byte; 158 client->services[service_index].hid_descriptor_len++; 159 return true; 160 } 161 162 static void hids_client_descriptor_storage_delete(hids_client_t * client){ 163 uint8_t service_index = 0; 164 uint16_t next_offset = 0; 165 166 for (service_index = 0; service_index < client->num_instances; service_index++){ 167 next_offset += client->services[service_index].hid_descriptor_offset + client->services[service_index].hid_descriptor_len; 168 client->services[service_index].hid_descriptor_len = 0; 169 client->services[service_index].hid_descriptor_offset = 0; 170 } 171 172 memmove(&hids_client_descriptor_storage[client->services[0].hid_descriptor_offset], 173 &hids_client_descriptor_storage[next_offset], 174 hids_client_descriptor_storage_len - next_offset); 175 176 uint8_t i; 177 btstack_linked_list_iterator_t it; 178 btstack_linked_list_iterator_init(&it, &clients); 179 while (btstack_linked_list_iterator_has_next(&it)){ 180 hids_client_t * conn = (hids_client_t *)btstack_linked_list_iterator_next(&it); 181 for (i = 0; i < client->num_instances; i++){ 182 if (conn->services[i].hid_descriptor_offset >= next_offset){ 183 conn->services[i].hid_descriptor_offset = next_offset; 184 next_offset += conn->services[service_index].hid_descriptor_len; 185 } 186 } 187 } 188 } 189 190 const uint8_t * hids_client_descriptor_storage_get_descriptor_data(uint16_t hids_cid, uint8_t service_index){ 191 hids_client_t * client = hids_get_client_for_cid(hids_cid); 192 if (client == NULL){ 193 return NULL; 194 } 195 if (service_index >= client->num_instances){ 196 return NULL; 197 } 198 return &hids_client_descriptor_storage[client->services[service_index].hid_descriptor_offset]; 199 } 200 201 uint16_t hids_client_descriptor_storage_get_descriptor_len(uint16_t hids_cid, uint8_t service_index){ 202 hids_client_t * client = hids_get_client_for_cid(hids_cid); 203 if (client == NULL){ 204 return 0; 205 } 206 if (service_index >= client->num_instances){ 207 return 0; 208 } 209 return client->services[service_index].hid_descriptor_len; 210 } 211 212 // END Descriptor Storage Util 213 214 static uint16_t hids_get_next_cid(void){ 215 if (hids_cid_counter == 0xffff) { 216 hids_cid_counter = 1; 217 } else { 218 hids_cid_counter++; 219 } 220 return hids_cid_counter; 221 } 222 223 static uint8_t find_report_index_for_value_handle(hids_client_t * client, uint16_t value_handle){ 224 uint8_t i; 225 for (i = 0; i < client->num_reports; i++){ 226 if (client->reports[i].value_handle == value_handle){ 227 return i; 228 } 229 } 230 return HIDS_CLIENT_INVALID_REPORT_INDEX; 231 } 232 233 static uint8_t find_report_index_for_report_id_and_type(hids_client_t * client, uint8_t report_id, hid_report_type_t report_type){ 234 uint8_t i; 235 for (i = 0; i < client->num_reports; i++){ 236 if ( (client->reports[i].report_id == report_id) && (client->reports[i].report_type == report_type)){ 237 return i; 238 } 239 } 240 return HIDS_CLIENT_INVALID_REPORT_INDEX; 241 } 242 243 static uint8_t hids_client_add_characteristic(hids_client_t * client, gatt_client_characteristic_t * characteristic, uint8_t report_id, hid_report_type_t report_type, bool boot_report){ 244 245 uint8_t report_index = find_report_index_for_value_handle(client, characteristic->value_handle); 246 if (report_index != HIDS_CLIENT_INVALID_REPORT_INDEX){ 247 return report_index; 248 } 249 report_index = client->num_reports; 250 251 if (report_index < HIDS_CLIENT_NUM_REPORTS) { 252 client->reports[report_index].value_handle = characteristic->value_handle; 253 client->reports[report_index].end_handle = characteristic->end_handle; 254 client->reports[report_index].properties = characteristic->properties; 255 256 client->reports[report_index].service_index = client->service_index; 257 client->reports[report_index].report_id = report_id; 258 client->reports[report_index].report_type = report_type; 259 client->reports[report_index].boot_report = boot_report; 260 261 // log_info("add index %d, id %d, type %d, value handle 0x%02x", report_index, report_id, report_type, characteristic->value_handle); 262 log_info("add index %d, id %d, type %d, value handle 0x%02x, properties 0x%02x", report_index, report_id, report_type, characteristic->value_handle, characteristic->properties); 263 client->num_reports++; 264 return report_index; 265 } else { 266 log_info("not enough storage, increase HIDS_CLIENT_NUM_REPORTS"); 267 return HIDS_CLIENT_INVALID_REPORT_INDEX; 268 } 269 } 270 271 static uint8_t hids_client_add_external_characteristic(hids_client_t * client, gatt_client_characteristic_t * characteristic){ 272 uint8_t report_index = client->num_external_reports; 273 274 if (report_index < HIDS_CLIENT_NUM_REPORTS) { 275 client->external_reports[report_index].value_handle = characteristic->value_handle; 276 client->external_reports[report_index].end_handle = characteristic->end_handle; 277 client->external_reports[report_index].properties = characteristic->properties; 278 279 client->external_reports[report_index].service_index = client->service_index; 280 // log_info("add index %d, id %d, type %d, value handle 0x%02x", report_index, report_id, report_type, characteristic->value_handle); 281 printf("add external index %d, value handle 0x%02x, properties 0x%02x\n", report_index, characteristic->value_handle, characteristic->properties); 282 client->num_external_reports++; 283 return report_index; 284 } else { 285 log_info("not enough storage, increase HIDS_CLIENT_NUM_REPORTS"); 286 return HIDS_CLIENT_INVALID_REPORT_INDEX; 287 } 288 } 289 290 291 static bool hid_clients_has_reports_in_report_mode(hids_client_t * client){ 292 uint8_t i; 293 for (i = 0; i < client->num_reports; i++){ 294 if (!client->reports[i].boot_report){ 295 return true; 296 } 297 } 298 return false; 299 } 300 301 static bool hid_clients_has_reports_in_boot_mode(hids_client_t * client){ 302 uint8_t i; 303 for (i = 0; i < client->num_reports; i++){ 304 if (client->reports[i].boot_report){ 305 return true; 306 } 307 } 308 return false; 309 } 310 311 static uint8_t hids_client_get_next_active_report_map_index(hids_client_t * client){ 312 uint8_t i; 313 for (i = client->service_index; i < client->num_instances; i++){ 314 if (client->services[i].report_map_value_handle != 0){ 315 return i; 316 } 317 } 318 client->service_index = HIDS_CLIENT_INVALID_REPORT_INDEX; 319 return HIDS_CLIENT_INVALID_REPORT_INDEX; 320 } 321 322 static bool hids_client_report_query_next_report_map(hids_client_t * client){ 323 client->service_index++; 324 if (hids_client_get_next_active_report_map_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 325 client->state = HIDS_CLIENT_STATE_W2_READ_REPORT_MAP_HID_DESCRIPTOR; 326 return true; 327 } 328 return false; 329 } 330 331 static bool hids_client_report_map_query_init(hids_client_t * client){ 332 client->service_index = 0; 333 334 if (hids_client_get_next_active_report_map_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 335 client->state = HIDS_CLIENT_STATE_W2_READ_REPORT_MAP_HID_DESCRIPTOR; 336 return true; 337 } 338 return false; 339 } 340 341 342 static uint8_t hids_client_get_next_active_report_map_uuid_index(hids_client_t * client){ 343 uint8_t i; 344 for (i = client->report_index; i < client->num_reports; i++){ 345 hids_client_report_t report = client->external_reports[i]; 346 if (report.report_type == HID_REPORT_TYPE_RESERVED && report.report_id == HID_REPORT_MODE_REPORT_MAP_ID){ 347 client->service_index = report.service_index; 348 return i; 349 } 350 } 351 client->report_index = HIDS_CLIENT_INVALID_REPORT_INDEX; 352 return HIDS_CLIENT_INVALID_REPORT_INDEX; 353 } 354 355 static bool hids_client_report_query_next_report_map_uuid(hids_client_t * client){ 356 client->report_index++; 357 if (hids_client_get_next_active_report_map_uuid_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 358 client->state = HIDS_CLIENT_STATE_W2_REPORT_MAP_READ_EXTERNAL_REPORT_REFERENCE_UUID; 359 return true; 360 } 361 return false; 362 } 363 364 static bool hids_client_report_map_uuid_query_init(hids_client_t * client){ 365 client->report_index = 0; 366 367 if (hids_client_get_next_active_report_map_uuid_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 368 client->state = HIDS_CLIENT_STATE_W2_REPORT_MAP_READ_EXTERNAL_REPORT_REFERENCE_UUID; 369 return true; 370 } 371 return false; 372 } 373 374 static uint8_t hids_client_get_next_report_index(hids_client_t * client){ 375 uint8_t i; 376 uint8_t index = HIDS_CLIENT_INVALID_REPORT_INDEX; 377 switch (client->protocol_mode){ 378 case HID_PROTOCOL_MODE_REPORT: 379 for (i = client->report_index; i < client->num_reports && (index == HIDS_CLIENT_INVALID_REPORT_INDEX); i++){ 380 hids_client_report_t report = client->reports[i]; 381 if (report.report_type == HID_REPORT_TYPE_RESERVED && report.report_id == HID_REPORT_MODE_REPORT_ID){ 382 index = i; 383 client->service_index = report.service_index; 384 } 385 } 386 break; 387 case HID_PROTOCOL_MODE_BOOT: 388 for (i = client->report_index; i < client->num_reports && (index == HIDS_CLIENT_INVALID_REPORT_INDEX); i++){ 389 hids_client_report_t report = client->reports[i]; 390 if (report.boot_report){ 391 index = i; 392 client->service_index = report.service_index; 393 } 394 } 395 break; 396 default: 397 break; 398 } 399 400 client->report_index = index; 401 return index; 402 } 403 404 static bool hids_client_report_query_next_report(hids_client_t * client){ 405 client->report_index++; 406 if (hids_client_get_next_report_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 407 client->state = HIDS_CLIENT_STATE_W2_FIND_REPORT; 408 return true; 409 } 410 return false; 411 } 412 413 static bool hids_client_report_query_init(hids_client_t * client){ 414 client->report_index = 0; 415 416 if (hids_client_get_next_report_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 417 client->state = HIDS_CLIENT_STATE_W2_FIND_REPORT; 418 return true; 419 } 420 return false; 421 } 422 423 static uint8_t hids_client_get_next_notification_report_index(hids_client_t * client){ 424 uint8_t i; 425 uint8_t index = HIDS_CLIENT_INVALID_REPORT_INDEX; 426 427 switch (client->protocol_mode){ 428 case HID_PROTOCOL_MODE_REPORT: 429 for (i = client->report_index; i < client->num_reports && (index == HIDS_CLIENT_INVALID_REPORT_INDEX); i++){ 430 hids_client_report_t report = client->reports[i]; 431 if (report.report_type != HID_REPORT_TYPE_INPUT){ 432 continue; 433 } 434 if (!report.boot_report){ 435 index = i; 436 } 437 } 438 break; 439 440 case HID_PROTOCOL_MODE_BOOT: 441 for (i = client->report_index; i < client->num_reports && (index == HIDS_CLIENT_INVALID_REPORT_INDEX); i++){ 442 hids_client_report_t report = client->reports[i]; 443 if (report.report_type != HID_REPORT_TYPE_INPUT){ 444 continue; 445 } 446 if (report.boot_report){ 447 index = i; 448 } 449 } 450 break; 451 452 default: 453 break; 454 } 455 456 client->report_index = index; 457 return index; 458 } 459 460 static bool hids_client_report_next_notification_report_index(hids_client_t * client){ 461 client->report_index++; 462 if (hids_client_get_next_notification_report_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 463 client->state = HIDS_CLIENT_STATE_W2_ENABLE_INPUT_REPORTS; 464 return true; 465 } 466 return false; 467 } 468 469 static bool hids_client_report_notifications_init(hids_client_t * client){ 470 client->report_index = 0; 471 472 if (hids_client_get_next_notification_report_index(client) != HIDS_CLIENT_INVALID_REPORT_INDEX){ 473 client->state = HIDS_CLIENT_STATE_W2_ENABLE_INPUT_REPORTS; 474 return true; 475 } 476 return false; 477 } 478 479 static hids_client_t * hids_create_client(hci_con_handle_t con_handle, uint16_t cid){ 480 hids_client_t * client = btstack_memory_hids_client_get(); 481 if (!client){ 482 log_error("Not enough memory to create client"); 483 return NULL; 484 } 485 client->state = HIDS_CLIENT_STATE_IDLE; 486 client->cid = cid; 487 client->con_handle = con_handle; 488 489 btstack_linked_list_add(&clients, (btstack_linked_item_t *) client); 490 return client; 491 } 492 493 static void hids_finalize_client(hids_client_t * client){ 494 // stop listening 495 uint8_t i; 496 for (i = 0; i < client->num_reports; i++){ 497 gatt_client_stop_listening_for_characteristic_value_updates(&client->reports[i].notification_listener); 498 } 499 500 hids_client_descriptor_storage_delete(client); 501 btstack_linked_list_remove(&clients, (btstack_linked_item_t *) client); 502 btstack_memory_hids_client_free(client); 503 } 504 505 506 static void hids_emit_connection_established(hids_client_t * client, uint8_t status){ 507 uint8_t event[8]; 508 int pos = 0; 509 event[pos++] = HCI_EVENT_GATTSERVICE_META; 510 event[pos++] = sizeof(event) - 2; 511 event[pos++] = GATTSERVICE_SUBEVENT_HID_SERVICE_CONNECTED; 512 little_endian_store_16(event, pos, client->cid); 513 pos += 2; 514 event[pos++] = status; 515 event[pos++] = client->protocol_mode; 516 event[pos++] = client->num_instances; 517 (*client->client_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 518 } 519 520 static void hids_client_setup_report_event(hids_client_t * client, uint8_t report_index, uint8_t *buffer, uint16_t report_len){ 521 uint16_t pos = 0; 522 buffer[pos++] = HCI_EVENT_GATTSERVICE_META; 523 pos++; // skip len 524 buffer[pos++] = GATTSERVICE_SUBEVENT_HID_REPORT; 525 little_endian_store_16(buffer, pos, client->cid); 526 pos += 2; 527 buffer[pos++] = client->reports[report_index].service_index; 528 buffer[pos++] = client->reports[report_index].report_id; 529 little_endian_store_16(buffer, pos, report_len + 1); 530 pos += 2; 531 buffer[pos++] = client->reports[report_index].report_id; 532 buffer[1] = pos + report_len + 1 - 2; 533 } 534 535 static void handle_report_hid_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 536 UNUSED(packet_type); 537 UNUSED(channel); 538 UNUSED(size); 539 if (hci_event_packet_get_type(packet) != GATT_EVENT_NOTIFICATION) return; 540 541 hids_client_t * client = hids_get_client_for_con_handle(gatt_event_notification_get_handle(packet)); 542 btstack_assert(client != NULL); 543 544 uint8_t report_index = find_report_index_for_value_handle(client, gatt_event_notification_get_value_handle(packet)); 545 if (report_index == HIDS_CLIENT_INVALID_REPORT_INDEX){ 546 return; 547 } 548 549 uint8_t * in_place_event = &packet[-1]; 550 hids_client_setup_report_event(client, report_index, in_place_event, gatt_event_notification_get_value_length(packet)); 551 552 (*client->client_handler)(HCI_EVENT_GATTSERVICE_META, client->cid, in_place_event, size); 553 } 554 555 556 static void hids_run_for_client(hids_client_t * client){ 557 uint8_t att_status; 558 gatt_client_service_t service; 559 gatt_client_characteristic_t characteristic; 560 561 switch (client->state){ 562 case HIDS_CLIENT_STATE_W2_QUERY_SERVICE: 563 #ifdef ENABLE_TESTING_SUPPORT 564 printf("\n\nQuery Services:\n"); 565 #endif 566 client->state = HIDS_CLIENT_STATE_W4_SERVICE_RESULT; 567 att_status = gatt_client_discover_primary_services_by_uuid16(handle_gatt_client_event, client->con_handle, ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE); 568 // TODO handle status 569 UNUSED(att_status); 570 break; 571 572 case HIDS_CLIENT_STATE_W2_QUERY_CHARACTERISTIC: 573 #ifdef ENABLE_TESTING_SUPPORT 574 printf("\n\nQuery Characteristics of service %d:\n", client->service_index); 575 #endif 576 client->state = HIDS_CLIENT_STATE_W4_CHARACTERISTIC_RESULT; 577 578 service.start_group_handle = client->services[client->service_index].start_handle; 579 service.end_group_handle = client->services[client->service_index].end_handle; 580 att_status = gatt_client_discover_characteristics_for_service(&handle_gatt_client_event, client->con_handle, &service); 581 582 UNUSED(att_status); 583 break; 584 585 case HIDS_CLIENT_STATE_W2_SET_BOOT_PROTOCOL_MODE: 586 att_status = gatt_client_write_value_of_characteristic_without_response(client->con_handle, client->protocol_mode_value_handle, 1, (uint8_t *)&client->required_protocol_mode); 587 UNUSED(att_status); 588 589 client->protocol_mode = client->required_protocol_mode; 590 if (hids_client_report_query_init(client)){ 591 break; 592 } 593 594 hids_emit_connection_established(client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 595 hids_finalize_client(client); 596 break; 597 598 case HIDS_CLIENT_W2_SEND_REPORT:{ 599 client->state = HIDS_CLIENT_STATE_CONNECTED; 600 601 att_status = gatt_client_write_value_of_characteristic_without_response(client->con_handle, 602 client->reports[client->report_index].value_handle, 603 client->report_len, (uint8_t *)client->report); 604 UNUSED(att_status); 605 break; 606 } 607 608 case HIDS_CLIENT_STATE_W2_READ_REPORT_MAP_HID_DESCRIPTOR: 609 #ifdef ENABLE_TESTING_SUPPORT 610 printf("\n\nRead REPORT_MAP (Handle 0x%04X) HID Descriptor of service %d:\n", client->services[client->service_index].report_map_value_handle, client->service_index); 611 #endif 612 client->state = HIDS_CLIENT_STATE_W4_REPORT_MAP_HID_DESCRIPTOR; 613 att_status = gatt_client_read_value_of_characteristic_using_value_handle(&handle_gatt_client_event, client->con_handle, client->services[client->service_index].report_map_value_handle); 614 615 UNUSED(att_status); 616 break; 617 618 case HIDS_CLIENT_STATE_W2_REPORT_MAP_DISCOVER_CHARACTERISTIC_DESCRIPTORS: 619 #ifdef ENABLE_TESTING_SUPPORT 620 printf("\nDiscover REPORT_MAP (Handle 0x%04X) Characteristic Descriptors of service %d:\n", client->services[client->service_index].report_map_value_handle, client->service_index); 621 #endif 622 client->state = HIDS_CLIENT_STATE_W4_REPORT_MAP_CHARACTERISTIC_DESCRIPTORS_RESULT; 623 624 characteristic.value_handle = client->services[client->service_index].report_map_value_handle; 625 characteristic.end_handle = client->services[client->service_index].report_map_end_handle; 626 627 att_status = gatt_client_discover_characteristic_descriptors(&handle_gatt_client_event, client->con_handle, &characteristic); 628 UNUSED(att_status); 629 break; 630 631 case HIDS_CLIENT_STATE_W2_REPORT_MAP_READ_EXTERNAL_REPORT_REFERENCE_UUID: 632 #ifdef ENABLE_TESTING_SUPPORT 633 printf("\nRead external chr UUID (Handle 0x%04X) Characteristic Descriptors:\n", client->reports[client->report_index].value_handle); 634 #endif 635 client->state = HIDS_CLIENT_STATE_W4_REPORT_MAP_EXTERNAL_REPORT_REFERENCE_UUID; 636 637 att_status = gatt_client_read_characteristic_descriptor_using_descriptor_handle(&handle_gatt_client_event, client->con_handle, client->reports[client->report_index].value_handle); 638 UNUSED(att_status); 639 break; 640 641 case HIDS_CLIENT_STATE_W2_DISCOVER_EXTERNAL_REPORT_CHARACTERISTIC: 642 #ifdef ENABLE_TESTING_SUPPORT 643 printf("\nDiscover EXTERNAL_REPORT_CHARACTERISTIC:\n"); 644 #endif 645 client->state = HIDS_CLIENT_STATE_W4_EXTERNAL_REPORT_CHARACTERISTIC_RESULT; 646 647 service.start_group_handle = 0x0001; 648 service.end_group_handle = 0xffff; 649 att_status = gatt_client_discover_characteristics_for_service(&handle_gatt_client_event, client->con_handle, &service); 650 UNUSED(att_status); 651 break; 652 653 case HIDS_CLIENT_STATE_W2_FIND_REPORT: 654 #ifdef ENABLE_TESTING_SUPPORT 655 printf("\nQuery Report (Handle 0x%04X, index %d) Characteristic Descriptors of service %d:\n", 656 client->reports[client->report_index].value_handle, 657 client->report_index, 658 client->reports[client->report_index].service_index); 659 #endif 660 client->state = HIDS_CLIENT_STATE_W4_REPORT_FOUND; 661 client->descriptor_handle = 0; 662 663 characteristic.value_handle = client->reports[client->report_index].value_handle; 664 characteristic.end_handle = client->reports[client->report_index].end_handle; 665 characteristic.properties = client->reports[client->report_index].properties; 666 667 att_status = gatt_client_discover_characteristic_descriptors(&handle_gatt_client_event, client->con_handle, &characteristic); 668 UNUSED(att_status); 669 break; 670 671 case HIDS_CLIENT_STATE_W2_READ_REPORT_ID_AND_TYPE: 672 client->state = HIDS_CLIENT_STATE_W4_REPORT_ID_AND_TYPE; 673 674 att_status = gatt_client_read_characteristic_descriptor_using_descriptor_handle(&handle_gatt_client_event, client->con_handle, client->descriptor_handle); 675 client->descriptor_handle = 0; 676 UNUSED(att_status); 677 break; 678 679 case HIDS_CLIENT_STATE_W2_ENABLE_INPUT_REPORTS: 680 client->state = HIDS_CLIENT_STATE_W4_INPUT_REPORTS_ENABLED; 681 682 characteristic.value_handle = client->reports[client->report_index].value_handle; 683 characteristic.end_handle = client->reports[client->report_index].end_handle; 684 characteristic.properties = client->reports[client->report_index].properties; 685 686 att_status = gatt_client_write_client_characteristic_configuration(&handle_gatt_client_event, client->con_handle, &characteristic, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION); 687 688 if (att_status != ERROR_CODE_SUCCESS){ 689 if (hids_client_report_next_notification_report_index(client)){ 690 hids_run_for_client(client); 691 break; 692 } 693 client->state = HIDS_CLIENT_STATE_CONNECTED; 694 hids_emit_connection_established(client, ERROR_CODE_SUCCESS); 695 } else { 696 gatt_client_listen_for_characteristic_value_updates( 697 &client->reports[client->report_index].notification_listener, 698 &handle_report_hid_event, client->con_handle, &characteristic); 699 700 client->state = HIDS_CLIENT_STATE_CONNECTED; 701 hids_emit_connection_established(client, ERROR_CODE_SUCCESS); 702 } 703 UNUSED(att_status); 704 break; 705 706 default: 707 break; 708 } 709 } 710 711 static void hids_client_parse_characteristic(hids_client_t * client, gatt_client_characteristic_t characteristic){ 712 uint8_t report_index = HIDS_CLIENT_INVALID_REPORT_INDEX; 713 714 switch (characteristic.uuid16){ 715 case ORG_BLUETOOTH_CHARACTERISTIC_PROTOCOL_MODE: 716 client->protocol_mode_value_handle = characteristic.value_handle; 717 break; 718 719 case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT: 720 report_index = hids_client_add_characteristic(client, &characteristic, HID_BOOT_MODE_KEYBOARD_ID, HID_REPORT_TYPE_INPUT, true); 721 break; 722 723 case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT: 724 report_index = hids_client_add_characteristic(client, &characteristic, HID_BOOT_MODE_MOUSE_ID, HID_REPORT_TYPE_INPUT, true); 725 break; 726 727 case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_OUTPUT_REPORT: 728 report_index = hids_client_add_characteristic(client, &characteristic, HID_BOOT_MODE_KEYBOARD_ID, HID_REPORT_TYPE_OUTPUT, false); 729 break; 730 731 case ORG_BLUETOOTH_CHARACTERISTIC_REPORT: 732 report_index = hids_client_add_characteristic(client, &characteristic, HID_REPORT_MODE_REPORT_ID, HID_REPORT_TYPE_RESERVED, false); 733 break; 734 735 case ORG_BLUETOOTH_CHARACTERISTIC_REPORT_MAP: 736 client->services[client->service_index].report_map_value_handle = characteristic.value_handle; 737 client->services[client->service_index].report_map_end_handle = characteristic.end_handle; 738 break; 739 740 case ORG_BLUETOOTH_CHARACTERISTIC_HID_INFORMATION: 741 // printf("ORG_BLUETOOTH_CHARACTERISTIC_HID_INFORMATION\n"); 742 break; 743 744 case ORG_BLUETOOTH_CHARACTERISTIC_HID_CONTROL_POINT: 745 // printf("ORG_BLUETOOTH_CHARACTERISTIC_HID_CONTROL_POINT\n"); 746 break; 747 default: 748 printf("TODO: found CHR 0x%02x\n", characteristic.uuid16); 749 return; 750 } 751 #ifdef ENABLE_TESTING_SUPPORT 752 if (report_index == HIDS_CLIENT_INVALID_REPORT_INDEX){ 753 printf("HID Characteristic %s: \n Attribute Handle 0x%04X, Properties 0x%02X, Handle 0x%04X, UUID 0x%04X, service %d\n", 754 hid_characteristic_name(characteristic.uuid16), 755 characteristic.start_handle, 756 characteristic.properties, 757 characteristic.value_handle, characteristic.uuid16, 758 client->service_index); 759 } else { 760 printf("HID Characteristic %s: \n Attribute Handle 0x%04X, Properties 0x%02X, Handle 0x%04X, UUID 0x%04X, service %d, report index 0x%02X\n", 761 hid_characteristic_name(characteristic.uuid16), 762 characteristic.start_handle, 763 characteristic.properties, 764 characteristic.value_handle, characteristic.uuid16, 765 client->service_index, report_index); 766 } 767 #endif 768 } 769 770 static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 771 UNUSED(packet_type); 772 UNUSED(channel); 773 UNUSED(size); 774 775 hids_client_t * client = NULL; 776 uint8_t att_status; 777 gatt_client_service_t service; 778 gatt_client_characteristic_t characteristic; 779 gatt_client_characteristic_descriptor_t characteristic_descriptor; 780 781 // hids_client_report_t * boot_keyboard_report; 782 // hids_client_report_t * boot_mouse_report; 783 const uint8_t * characteristic_descriptor_value; 784 uint8_t i; 785 uint8_t report_index; 786 787 const uint8_t * descriptor; 788 uint16_t descriptor_len; 789 790 switch(hci_event_packet_get_type(packet)){ 791 case GATT_EVENT_SERVICE_QUERY_RESULT: 792 client = hids_get_client_for_con_handle(gatt_event_service_query_result_get_handle(packet)); 793 btstack_assert(client != NULL); 794 795 if (client->state != HIDS_CLIENT_STATE_W4_SERVICE_RESULT) { 796 hids_emit_connection_established(client, GATT_CLIENT_IN_WRONG_STATE); 797 hids_finalize_client(client); 798 break; 799 } 800 801 if (client->num_instances < MAX_NUM_HID_SERVICES){ 802 uint8_t index = client->num_instances; 803 gatt_event_service_query_result_get_service(packet, &service); 804 client->services[index].start_handle = service.start_group_handle; 805 client->services[index].end_handle = service.end_group_handle; 806 client->num_instances++; 807 808 #ifdef ENABLE_TESTING_SUPPORT 809 printf("HID Service: start handle 0x%04X, end handle 0x%04X\n", client->services[index].start_handle, client->services[index].end_handle); 810 #endif 811 hids_client_descriptor_storage_init(client, index); 812 } else { 813 log_info("%d hid services found, only first %d can be stored, increase MAX_NUM_HID_SERVICES", client->num_instances + 1, MAX_NUM_HID_SERVICES); 814 } 815 break; 816 817 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT: 818 client = hids_get_client_for_con_handle(gatt_event_characteristic_query_result_get_handle(packet)); 819 btstack_assert(client != NULL); 820 gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic); 821 hids_client_parse_characteristic(client, characteristic); 822 break; 823 824 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT: 825 // Map Report characteristic value == HID Descriptor 826 client = hids_get_client_for_con_handle(gatt_event_characteristic_value_query_result_get_handle(packet)); 827 btstack_assert(client != NULL); 828 829 descriptor_len = gatt_event_characteristic_value_query_result_get_value_length(packet); 830 descriptor = gatt_event_characteristic_value_query_result_get_value(packet); 831 #ifdef ENABLE_TESTING_SUPPORT 832 printf("Found HID Descriptor[%d] for service %d\n", descriptor_len, client->service_index); 833 #endif 834 for (i = 0; i < descriptor_len; i++){ 835 bool stored = hids_client_descriptor_storage_store(client, client->service_index, descriptor[i]); 836 if (!stored){ 837 client->services[client->service_index].hid_descriptor_status = ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 838 break; 839 } 840 } 841 break; 842 843 case GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 844 client = hids_get_client_for_con_handle(gatt_event_all_characteristic_descriptors_query_result_get_handle(packet)); 845 btstack_assert(client != NULL); 846 gatt_event_all_characteristic_descriptors_query_result_get_characteristic_descriptor(packet, &characteristic_descriptor); 847 848 switch (client->state) { 849 case HIDS_CLIENT_STATE_W4_REPORT_MAP_CHARACTERISTIC_DESCRIPTORS_RESULT: 850 // setup for descriptor value query 851 if (characteristic_descriptor.uuid16 == ORG_BLUETOOTH_DESCRIPTOR_EXTERNAL_REPORT_REFERENCE){ 852 report_index = hids_client_add_external_characteristic(client, &characteristic); 853 854 if (report_index != HIDS_CLIENT_INVALID_REPORT_INDEX){ 855 client->external_reports[report_index].value_handle = characteristic_descriptor.handle; 856 client->external_reports[report_index].service_index = client->service_index; 857 } 858 859 #ifdef ENABLE_TESTING_SUPPORT 860 if (report_index != HIDS_CLIENT_INVALID_REPORT_INDEX){ 861 printf(" External Report Reference Characteristic Descriptor: Handle 0x%04X, UUID 0x%04X, service %d, report index 0x%02X\n", 862 characteristic_descriptor.handle, 863 characteristic_descriptor.uuid16, 864 client->service_index, report_index); 865 } 866 #endif 867 } 868 break; 869 case HIDS_CLIENT_STATE_W4_REPORT_FOUND: 870 // setup for descriptor value query 871 if (characteristic_descriptor.uuid16 == ORG_BLUETOOTH_DESCRIPTOR_REPORT_REFERENCE){ 872 client->descriptor_handle = characteristic_descriptor.handle; 873 } 874 875 #ifdef ENABLE_TESTING_SUPPORT 876 if (characteristic_descriptor.uuid16 == ORG_BLUETOOTH_DESCRIPTOR_REPORT_REFERENCE){ 877 printf(" Report Characteristic Report Reference Characteristic Descriptor: Handle 0x%04X, UUID 0x%04X\n", 878 characteristic_descriptor.handle, 879 characteristic_descriptor.uuid16); 880 } 881 882 if (characteristic_descriptor.uuid16 == ORG_BLUETOOTH_DESCRIPTOR_GATT_CLIENT_CHARACTERISTIC_CONFIGURATION){ 883 printf(" Report Client Characteristic Configuration Descriptor: Handle 0x%04X, UUID 0x%04X\n", 884 characteristic_descriptor.handle, 885 characteristic_descriptor.uuid16); 886 } 887 #endif 888 break; 889 890 default: 891 break; 892 } 893 break; 894 895 case GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT: 896 client = hids_get_client_for_con_handle(gatt_event_characteristic_descriptor_query_result_get_handle(packet)); 897 btstack_assert(client != NULL); 898 899 if (gatt_event_characteristic_descriptor_query_result_get_descriptor_length(packet) != 2){ 900 break; 901 } 902 903 characteristic_descriptor_value = gatt_event_characteristic_descriptor_query_result_get_descriptor(packet); 904 switch (client->state) { 905 case HIDS_CLIENT_STATE_W4_REPORT_MAP_EXTERNAL_REPORT_REFERENCE_UUID: 906 // get external report characteristic uuid 907 report_index = find_report_index_for_value_handle(client, gatt_event_characteristic_descriptor_query_result_get_descriptor_handle(packet)); 908 if (report_index != HIDS_CLIENT_INVALID_REPORT_INDEX){ 909 client->reports[report_index].external_report_reference_uuid = little_endian_read_16(characteristic_descriptor_value, 0); 910 #ifdef ENABLE_TESTING_SUPPORT 911 printf("update external_report_reference_uuid report 0x%02X, index 0x%02X, handle 0%02X\n", 912 client->reports[report_index].external_report_reference_uuid, 913 report_index, 914 gatt_event_characteristic_descriptor_query_result_get_descriptor_handle(packet)); 915 #endif 916 } 917 break; 918 919 case HIDS_CLIENT_STATE_W4_REPORT_ID_AND_TYPE: 920 client->reports[client->report_index].report_id = characteristic_descriptor_value[0]; 921 client->reports[client->report_index].report_type = (hid_report_type_t)characteristic_descriptor_value[1]; 922 log_info("update index %d, id %d, type %d, value handle 0x%02x", 923 client->report_index, 924 client->reports[client->report_index].report_id, 925 client->reports[client->report_index].report_type, 926 client->reports[client->report_index].value_handle); 927 928 break; 929 930 default: 931 break; 932 } 933 break; 934 935 case GATT_EVENT_QUERY_COMPLETE: 936 client = hids_get_client_for_con_handle(gatt_event_query_complete_get_handle(packet)); 937 btstack_assert(client != NULL); 938 939 att_status = gatt_event_query_complete_get_att_status(packet); 940 941 switch (client->state){ 942 case HIDS_CLIENT_STATE_W4_SERVICE_RESULT: 943 if (att_status != ATT_ERROR_SUCCESS){ 944 hids_emit_connection_established(client, att_status); 945 hids_finalize_client(client); 946 break; 947 } 948 949 if (client->num_instances == 0){ 950 hids_emit_connection_established(client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 951 hids_finalize_client(client); 952 break; 953 } 954 955 client->state = HIDS_CLIENT_STATE_W2_QUERY_CHARACTERISTIC; 956 client->service_index = 0; 957 break; 958 959 case HIDS_CLIENT_STATE_W4_CHARACTERISTIC_RESULT: 960 if (att_status != ATT_ERROR_SUCCESS){ 961 hids_emit_connection_established(client, att_status); 962 hids_finalize_client(client); 963 break; 964 } 965 966 if ((client->service_index + 1) < client->num_instances){ 967 // discover characteristics of next service 968 client->service_index++; 969 client->state = HIDS_CLIENT_STATE_W2_QUERY_CHARACTERISTIC; 970 break; 971 } 972 973 switch (client->required_protocol_mode){ 974 case HID_PROTOCOL_MODE_REPORT: 975 client->protocol_mode = HID_PROTOCOL_MODE_REPORT; 976 if (hid_clients_has_reports_in_report_mode(client)){ 977 client->protocol_mode = HID_PROTOCOL_MODE_REPORT; 978 break; 979 } 980 hids_emit_connection_established(client, att_status); 981 hids_finalize_client(client); 982 return; 983 984 case HID_PROTOCOL_MODE_REPORT_WITH_FALLBACK_TO_BOOT: 985 if (hid_clients_has_reports_in_report_mode(client)){ 986 client->protocol_mode = HID_PROTOCOL_MODE_REPORT; 987 break; 988 } 989 if (hid_clients_has_reports_in_boot_mode(client)){ 990 if (client->protocol_mode_value_handle != 0){ 991 client->state = HIDS_CLIENT_STATE_W2_SET_BOOT_PROTOCOL_MODE; 992 break; 993 } 994 hids_emit_connection_established(client, att_status); 995 hids_finalize_client(client); 996 return; 997 } 998 break; 999 default: 1000 if (hid_clients_has_reports_in_boot_mode(client)){ 1001 if (client->protocol_mode_value_handle != 0){ 1002 client->state = HIDS_CLIENT_STATE_W2_SET_BOOT_PROTOCOL_MODE; 1003 break; 1004 } 1005 hids_emit_connection_established(client, att_status); 1006 hids_finalize_client(client); 1007 return; 1008 } 1009 break; 1010 } 1011 1012 if (client->state == HIDS_CLIENT_STATE_W2_SET_BOOT_PROTOCOL_MODE){ 1013 break; 1014 } 1015 1016 // 1. we need to get HID Descriptor and 1017 // 2. get external Report characteristics if referenced from Report Map 1018 if (hids_client_report_map_query_init(client)){ 1019 break; 1020 } 1021 hids_emit_connection_established(client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 1022 hids_finalize_client(client); 1023 break; 1024 1025 1026 // HID descriptor found 1027 case HIDS_CLIENT_STATE_W4_REPORT_MAP_HID_DESCRIPTOR: 1028 if (att_status != ATT_ERROR_SUCCESS){ 1029 hids_emit_connection_established(client, att_status); 1030 hids_finalize_client(client); 1031 break; 1032 } 1033 printf("HIDS_CLIENT_STATE_W2_REPORT_MAP_DISCOVER_CHARACTERISTIC_DESCRIPTORS for service %d\n", client->service_index); 1034 client->state = HIDS_CLIENT_STATE_W2_REPORT_MAP_DISCOVER_CHARACTERISTIC_DESCRIPTORS; 1035 break; 1036 1037 // found all descriptors, check if there is one with EXTERNAL_REPORT_REFERENCE 1038 case HIDS_CLIENT_STATE_W4_REPORT_MAP_CHARACTERISTIC_DESCRIPTORS_RESULT: 1039 // go for next report map 1040 if (hids_client_report_query_next_report_map(client)){ 1041 break; 1042 } 1043 1044 // read UUIDS for external characteristics 1045 if (hids_client_report_map_uuid_query_init(client)){ 1046 break; 1047 } 1048 1049 // discover characteristic descriptor for all Report characteristics, 1050 // then read value of characteristic descriptor to get Report ID 1051 if (hids_client_report_query_init(client)){ 1052 break; 1053 } 1054 1055 hids_emit_connection_established(client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 1056 hids_finalize_client(client); 1057 break; 1058 1059 case HIDS_CLIENT_STATE_W4_REPORT_MAP_EXTERNAL_REPORT_REFERENCE_UUID: 1060 // go for next map report 1061 if (hids_client_report_query_next_report_map_uuid(client)){ 1062 break; 1063 } 1064 1065 // update external characteristics with correct value handle and end handle 1066 client->state = HIDS_CLIENT_STATE_W2_DISCOVER_EXTERNAL_REPORT_CHARACTERISTIC; 1067 break; 1068 1069 case HIDS_CLIENT_STATE_W4_EXTERNAL_REPORT_CHARACTERISTIC_RESULT: 1070 // discover characteristic descriptor for all Report characteristics, 1071 // then read value of characteristic descriptor to get Report ID 1072 if (hids_client_report_query_init(client)){ 1073 break; 1074 } 1075 1076 hids_emit_connection_established(client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 1077 hids_finalize_client(client); 1078 break; 1079 1080 case HIDS_CLIENT_STATE_W4_REPORT_FOUND: 1081 if (client->descriptor_handle != 0){ 1082 // descriptor found 1083 client->state = HIDS_CLIENT_STATE_W2_READ_REPORT_ID_AND_TYPE; 1084 break; 1085 } 1086 1087 // go for next report 1088 if (hids_client_report_query_next_report(client)){ 1089 break; 1090 } 1091 1092 hids_emit_connection_established(client, ERROR_CODE_SUCCESS); 1093 break; 1094 1095 case HIDS_CLIENT_STATE_W4_REPORT_ID_AND_TYPE: 1096 // go for next report 1097 if (hids_client_report_query_next_report(client)){ 1098 break; 1099 } 1100 1101 if (hids_client_report_notifications_init(client)){ 1102 break; 1103 } 1104 hids_emit_connection_established(client, ERROR_CODE_SUCCESS); 1105 break; 1106 1107 case HIDS_CLIENT_STATE_W4_INPUT_REPORTS_ENABLED: 1108 if (hids_client_report_next_notification_report_index(client)){ 1109 break; 1110 } 1111 hids_emit_connection_established(client, ERROR_CODE_SUCCESS); 1112 break; 1113 1114 default: 1115 break; 1116 } 1117 break; 1118 1119 default: 1120 break; 1121 } 1122 1123 if (client != NULL){ 1124 hids_run_for_client(client); 1125 } 1126 } 1127 1128 uint8_t hids_client_connect(hci_con_handle_t con_handle, btstack_packet_handler_t packet_handler, hid_protocol_mode_t protocol_mode, uint16_t * hids_cid){ 1129 btstack_assert(packet_handler != NULL); 1130 1131 hids_client_t * client = hids_get_client_for_con_handle(con_handle); 1132 if (client != NULL){ 1133 return ERROR_CODE_COMMAND_DISALLOWED; 1134 } 1135 1136 uint16_t cid = hids_get_next_cid(); 1137 if (hids_cid != NULL) { 1138 *hids_cid = cid; 1139 } 1140 1141 client = hids_create_client(con_handle, cid); 1142 if (client == NULL) { 1143 return BTSTACK_MEMORY_ALLOC_FAILED; 1144 } 1145 1146 client->required_protocol_mode = protocol_mode; 1147 client->client_handler = packet_handler; 1148 client->state = HIDS_CLIENT_STATE_W2_QUERY_SERVICE; 1149 1150 hids_run_for_client(client); 1151 return ERROR_CODE_SUCCESS; 1152 } 1153 1154 uint8_t hids_client_disconnect(uint16_t hids_cid){ 1155 hids_client_t * client = hids_get_client_for_cid(hids_cid); 1156 if (client == NULL){ 1157 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1158 } 1159 // finalize connection 1160 hids_finalize_client(client); 1161 return ERROR_CODE_SUCCESS; 1162 } 1163 1164 uint8_t hids_client_send_report(uint16_t hids_cid, uint8_t report_id, const uint8_t * report, uint8_t report_len){ 1165 hids_client_t * client = hids_get_client_for_cid(hids_cid); 1166 if (client == NULL){ 1167 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1168 } 1169 1170 if (client->state != HIDS_CLIENT_STATE_CONNECTED) { 1171 return ERROR_CODE_COMMAND_DISALLOWED; 1172 } 1173 1174 uint8_t report_index = find_report_index_for_report_id_and_type(client, report_id, HID_REPORT_TYPE_OUTPUT); 1175 if (report_index == HIDS_CLIENT_INVALID_REPORT_INDEX){ 1176 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1177 } 1178 1179 uint16_t mtu; 1180 uint8_t status = gatt_client_get_mtu(client->con_handle, &mtu); 1181 1182 if (status != ERROR_CODE_SUCCESS){ 1183 return status; 1184 } 1185 1186 if (mtu - 2 < report_len){ 1187 return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; 1188 } 1189 1190 client->state = HIDS_CLIENT_W2_SEND_REPORT; 1191 client->report_index = report_index; 1192 client->report = report; 1193 client->report_len = report_len; 1194 1195 hids_run_for_client(client); 1196 return ERROR_CODE_SUCCESS; 1197 } 1198 1199 void hids_client_init(uint8_t * hid_descriptor_storage, uint16_t hid_descriptor_storage_len){ 1200 hids_client_descriptor_storage = hid_descriptor_storage; 1201 hids_client_descriptor_storage_len = hid_descriptor_storage_len; 1202 } 1203 1204 void hids_client_deinit(void){} 1205