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 BLUEKITCHEN 24 * GMBH 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_device.c" 39 40 /** 41 * Implementation of the GATT HIDS Device 42 * To use with your application, add '#import <hids.gatt>' to your .gatt file 43 */ 44 45 #include "hids_device.h" 46 47 #include "ble/att_db.h" 48 #include "ble/att_server.h" 49 #include "bluetooth_gatt.h" 50 #include "btstack_util.h" 51 #include "btstack_debug.h" 52 53 #define HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS 0x80 54 55 // storage for 'generic' HID Device with single Input, Output, and Feature Report 56 static hids_device_report_t hid_reports_generic_storage[3]; 57 58 typedef struct{ 59 uint16_t con_handle; 60 61 uint8_t hid_country_code; 62 const uint8_t * hid_descriptor; 63 uint16_t hid_descriptor_size; 64 65 uint16_t hid_report_map_handle; 66 uint8_t hid_protocol_mode; 67 uint16_t hid_protocol_mode_value_handle; 68 69 uint16_t hid_boot_mouse_input_value_handle; 70 uint16_t hid_boot_mouse_input_client_configuration_handle; 71 uint16_t hid_boot_mouse_input_client_configuration_value; 72 73 uint16_t hid_boot_keyboard_input_value_handle; 74 uint16_t hid_boot_keyboard_input_client_configuration_handle; 75 uint16_t hid_boot_keyboard_input_client_configuration_value; 76 77 hids_device_report_t * hid_reports; 78 79 uint8_t hid_input_reports_num; 80 uint8_t hid_output_reports_num; 81 uint8_t hid_feature_reports_num; 82 83 uint16_t hid_control_point_value_handle; 84 uint8_t hid_control_point_suspend; 85 86 btstack_context_callback_registration_t battery_callback; 87 } hids_device_t; 88 89 static hids_device_t hids_device; 90 91 static btstack_packet_handler_t packet_handler; 92 static att_service_handler_t hid_service; 93 94 // TODO: store hids device connection into list 95 static hids_device_t * hids_device_get_instance_for_con_handle(uint16_t con_handle){ 96 UNUSED(con_handle); 97 return &hids_device; 98 } 99 100 static hids_device_t * hids_device_create_instance(void){ 101 memset(&hids_device, 0, sizeof(hids_device_t)); 102 return &hids_device; 103 } 104 105 static hids_device_report_t * hids_device_get_report_for_client_configuration_handle(hids_device_t * device, uint16_t client_configuration_handle){ 106 uint8_t pos; 107 uint8_t total_reports = device->hid_input_reports_num + device->hid_output_reports_num + device->hid_feature_reports_num; 108 for (pos = 0 ; pos < total_reports ; pos++){ 109 if (device->hid_reports[pos].client_configuration_handle == client_configuration_handle){ 110 return &device->hid_reports[pos]; 111 } 112 } 113 return NULL; 114 } 115 116 static hids_device_report_t * hids_device_get_report_for_type_and_id(hids_device_t * device, hid_report_type_t type, uint16_t report_id){ 117 uint8_t pos; 118 uint8_t total_reports = device->hid_input_reports_num + device->hid_output_reports_num + device->hid_feature_reports_num; 119 for (pos = 0 ; pos < total_reports ; pos++){ 120 if ((device->hid_reports[pos].type == type) && (device->hid_reports[pos].id == report_id)){ 121 return &device->hid_reports[pos]; 122 } 123 } 124 return NULL; 125 } 126 127 static hids_device_report_t * hids_device_get_report_for_id(hids_device_t * device, uint16_t report_id){ 128 uint8_t pos; 129 uint8_t total_reports = device->hid_input_reports_num + device->hid_output_reports_num + device->hid_feature_reports_num; 130 for (pos = 0 ; pos < total_reports ; pos++){ 131 if (device->hid_reports[pos].id == report_id){ 132 return &device->hid_reports[pos]; 133 } 134 } 135 return NULL; 136 } 137 138 static void hids_device_emit_event_with_uint8(uint8_t event, hci_con_handle_t con_handle, uint8_t value){ 139 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 140 if (!instance){ 141 log_error("no instance for handle 0x%02x", con_handle); 142 return; 143 } 144 145 if (!packet_handler) return; 146 uint8_t buffer[6]; 147 buffer[0] = HCI_EVENT_HIDS_META; 148 buffer[1] = 4; 149 buffer[2] = event; 150 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 151 buffer[5] = value; 152 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 153 } 154 155 static void hids_device_emit_event(uint8_t event, hci_con_handle_t con_handle){ 156 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 157 if (!instance){ 158 log_error("no instance for handle 0x%02x", con_handle); 159 return; 160 } 161 162 if (!packet_handler) return; 163 uint8_t buffer[5]; 164 buffer[0] = HCI_EVENT_HIDS_META; 165 buffer[1] = 4; 166 buffer[2] = event; 167 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 168 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 169 } 170 171 static void hids_device_can_send_now(void * context){ 172 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) context; 173 // notify client 174 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 175 if (!instance){ 176 log_error("no instance for handle 0x%02x", con_handle); 177 return; 178 } 179 180 if (!packet_handler) return; 181 uint8_t buffer[5]; 182 buffer[0] = HCI_EVENT_HIDS_META; 183 buffer[1] = 3; 184 buffer[2] = HIDS_SUBEVENT_CAN_SEND_NOW; 185 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 186 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 187 } 188 189 // ATT Client Read Callback for Dynamic Data 190 // - if buffer == NULL, don't copy data, just return size of value 191 // - if buffer != NULL, copy data and return number bytes copied 192 static uint16_t att_read_callback(hci_con_handle_t con_handle, uint16_t att_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){ 193 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 194 if (!instance){ 195 log_error("no instance for handle 0x%02x", con_handle); 196 return HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS; 197 } 198 199 if (att_handle == instance->hid_protocol_mode_value_handle){ 200 log_info("Read protocol mode"); 201 return att_read_callback_handle_byte(instance->hid_protocol_mode, offset, buffer, buffer_size); 202 } 203 204 if (att_handle == instance->hid_report_map_handle){ 205 log_info("Read report map"); 206 return att_read_callback_handle_blob(instance->hid_descriptor, instance->hid_descriptor_size, offset, buffer, buffer_size); 207 } 208 209 if (att_handle == instance->hid_boot_mouse_input_client_configuration_handle){ 210 return att_read_callback_handle_little_endian_16(instance->hid_boot_mouse_input_client_configuration_value, offset, buffer, buffer_size); 211 } 212 213 if (att_handle == instance->hid_boot_keyboard_input_client_configuration_handle){ 214 return att_read_callback_handle_little_endian_16(instance->hid_boot_keyboard_input_client_configuration_value, offset, buffer, buffer_size); 215 } 216 217 if (att_handle == instance->hid_control_point_value_handle){ 218 if (buffer && (buffer_size >= 1u)){ 219 buffer[0] = instance->hid_control_point_suspend; 220 } 221 return 1; 222 } 223 224 hids_device_report_t * report = hids_device_get_report_for_client_configuration_handle(instance, att_handle); 225 if (report != NULL){ 226 return att_read_callback_handle_little_endian_16(report->client_configuration_value, offset, buffer, buffer_size); 227 } 228 return 0; 229 } 230 231 static int att_write_callback(hci_con_handle_t con_handle, uint16_t att_handle, uint16_t transaction_mode, uint16_t offset, uint8_t *buffer, uint16_t buffer_size){ 232 UNUSED(transaction_mode); 233 UNUSED(buffer_size); 234 UNUSED(offset); 235 236 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 237 if (!instance){ 238 log_error("no instance for handle 0x%02x", con_handle); 239 return HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS; 240 } 241 242 if (att_handle == instance->hid_boot_mouse_input_client_configuration_handle){ 243 uint16_t new_value = little_endian_read_16(buffer, 0); 244 instance->hid_boot_mouse_input_client_configuration_value = new_value; 245 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_BOOT_MOUSE_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 246 } 247 if (att_handle == instance->hid_boot_keyboard_input_client_configuration_handle){ 248 uint16_t new_value = little_endian_read_16(buffer, 0); 249 instance->hid_boot_keyboard_input_client_configuration_value = new_value; 250 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_BOOT_KEYBOARD_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 251 } 252 253 if (att_handle == instance->hid_protocol_mode_value_handle){ 254 instance->hid_protocol_mode = buffer[0]; 255 log_info("Set protocol mode: %u", instance->hid_protocol_mode); 256 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_PROTOCOL_MODE, con_handle, instance->hid_protocol_mode); 257 } 258 259 if (att_handle == instance->hid_control_point_value_handle){ 260 if (buffer_size < 1u){ 261 return ATT_ERROR_INVALID_OFFSET; 262 } 263 instance->hid_control_point_suspend = buffer[0]; 264 instance->con_handle = con_handle; 265 log_info("Set suspend tp: %u", instance->hid_control_point_suspend ); 266 if (instance->hid_control_point_suspend == 0u){ 267 hids_device_emit_event(HIDS_SUBEVENT_SUSPEND, con_handle); 268 } else if (instance->hid_control_point_suspend == 1u){ 269 hids_device_emit_event(HIDS_SUBEVENT_EXIT_SUSPEND, con_handle); 270 } 271 } 272 273 hids_device_report_t * report = hids_device_get_report_for_client_configuration_handle(instance, att_handle); 274 if (report != NULL){ 275 uint16_t new_value = little_endian_read_16(buffer, 0); 276 report->client_configuration_value = new_value; 277 log_info("Enable Report (type %u) notifications: %x", (uint8_t) report->type, new_value); 278 279 switch (report->type){ 280 case HID_REPORT_TYPE_INPUT: 281 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 282 break; 283 case HID_REPORT_TYPE_OUTPUT: 284 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_OUTPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 285 break; 286 case HID_REPORT_TYPE_FEATURE: 287 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_FEATURE_REPORT_ENABLE, con_handle, (uint8_t) new_value); 288 break; 289 default: 290 btstack_unreachable(); 291 break; 292 } 293 } 294 return 0; 295 } 296 297 void hids_device_init_with_storage(uint8_t hid_country_code, const uint8_t * hid_descriptor, uint16_t hid_descriptor_size, 298 uint16_t num_reports, hids_device_report_t * report_storage){ 299 300 hids_device_t * instance = hids_device_create_instance(); 301 302 btstack_assert(num_reports > 0); 303 btstack_assert(report_storage != NULL); 304 305 instance->hid_country_code = hid_country_code; 306 instance->hid_descriptor = hid_descriptor; 307 instance->hid_descriptor_size = hid_descriptor_size; 308 309 // default 310 instance->hid_protocol_mode = 1; 311 312 // get service handle range 313 uint16_t start_handle = 0; 314 uint16_t end_handle = 0xffff; 315 int service_found = gatt_server_get_handle_range_for_service_with_uuid16(ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE, &start_handle, &end_handle); 316 btstack_assert(service_found != 0); 317 UNUSED(service_found); 318 319 // get report map handle 320 instance->hid_report_map_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT_MAP); 321 322 // get report map handle 323 instance->hid_protocol_mode_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_PROTOCOL_MODE); 324 325 // get value and client configuration handles for boot mouse input, boot keyboard input and report input 326 instance->hid_boot_mouse_input_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT); 327 instance->hid_boot_mouse_input_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT); 328 329 instance->hid_boot_keyboard_input_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT); 330 instance->hid_boot_keyboard_input_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT); 331 332 instance->hid_control_point_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_HID_CONTROL_POINT); 333 334 log_info("hid_report_map_handle 0x%02x", instance->hid_report_map_handle); 335 log_info("hid_protocol_mode_value_handle 0x%02x", instance->hid_protocol_mode_value_handle); 336 log_info("hid_boot_mouse_input_value_handle 0x%02x", instance->hid_boot_mouse_input_value_handle); 337 log_info("hid_boot_mouse_input_client_configuration_handle 0x%02x", instance->hid_boot_mouse_input_client_configuration_handle); 338 log_info("hid_boot_keyboard_input_value_handle 0x%02x", instance->hid_boot_keyboard_input_value_handle); 339 log_info("hid_boot_keyboard_input_client_configuration_handle 0x%02x", instance->hid_boot_keyboard_input_client_configuration_handle); 340 log_info("hid_control_point_value_handle 0x%02x", instance->hid_control_point_value_handle); 341 342 instance->hid_reports = report_storage; 343 344 uint16_t hid_reports_num = num_reports; 345 uint16_t assigned_reports_num = 0; 346 uint16_t start_chr_handle = start_handle; 347 348 while ( (start_chr_handle < end_handle) && (assigned_reports_num < hid_reports_num)) { 349 uint16_t chr_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_chr_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT); 350 if (chr_value_handle == 0){ 351 break; 352 } 353 354 uint16_t chr_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_chr_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT); 355 uint16_t report_reference_handle = gatt_server_get_descriptor_handle_for_characteristic_with_uuid16(start_chr_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT, ORG_BLUETOOTH_DESCRIPTOR_REPORT_REFERENCE); 356 uint16_t report_reference_value_len; 357 const uint8_t * report_reference_value = gatt_server_get_const_value_for_handle(report_reference_handle, &report_reference_value_len); 358 359 if (report_reference_value == NULL){ 360 break; 361 } 362 if (report_reference_value_len != 2){ 363 break; 364 } 365 366 hids_device_report_t * report = &report_storage[assigned_reports_num]; 367 report->value_handle = chr_value_handle; 368 report->client_configuration_handle = chr_client_configuration_handle; 369 report->client_configuration_value = 0; 370 371 report->id = report_reference_value[0]; 372 report->type = (hid_report_type_t)report_reference_value[1]; 373 374 switch (report->type){ 375 case HID_REPORT_TYPE_INPUT: 376 instance->hid_input_reports_num++; 377 break; 378 case HID_REPORT_TYPE_OUTPUT: 379 instance->hid_output_reports_num++; 380 break; 381 case HID_REPORT_TYPE_FEATURE: 382 instance->hid_feature_reports_num++; 383 break; 384 default: 385 btstack_unreachable(); 386 return; 387 } 388 log_info("hid_report_value_handle 0x%02x, id %u, type %u", report->value_handle, report->id, (uint8_t)report->type); 389 log_info("hid_report_client_configuration_handle 0x%02x", report->client_configuration_handle); 390 391 assigned_reports_num++; 392 start_chr_handle = chr_client_configuration_handle + 1; 393 } 394 395 // register service with ATT Server 396 hid_service.start_handle = start_handle; 397 hid_service.end_handle = end_handle; 398 hid_service.read_callback = &att_read_callback; 399 hid_service.write_callback = &att_write_callback; 400 att_server_register_service_handler(&hid_service); 401 } 402 403 /** 404 * @brief Set up HIDS Device 405 */ 406 void hids_device_init(uint8_t country_code, const uint8_t * descriptor, uint16_t descriptor_size){ 407 uint16_t hid_reports_num = sizeof(hid_reports_generic_storage) / sizeof(hids_device_report_t); 408 hids_device_init_with_storage(country_code, descriptor, descriptor_size, hid_reports_num, hid_reports_generic_storage); 409 } 410 411 /** 412 * @brief Register callback for the HIDS Device client. 413 * @param callback 414 */ 415 void hids_device_register_packet_handler(btstack_packet_handler_t callback){ 416 packet_handler = callback; 417 } 418 419 /** 420 * @brief Request can send now event to send HID Report 421 * Generates an HIDS_SUBEVENT_CAN_SEND_NOW subevent 422 * @param hid_cid 423 */ 424 void hids_device_request_can_send_now_event(hci_con_handle_t con_handle){ 425 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 426 if (!instance){ 427 log_error("no instance for handle 0x%02x", con_handle); 428 return; 429 } 430 431 instance->battery_callback.callback = &hids_device_can_send_now; 432 instance->battery_callback.context = (void*) (uintptr_t) con_handle; 433 att_server_register_can_send_now_callback(&instance->battery_callback, con_handle); 434 } 435 436 uint8_t hids_device_send_input_report_for_id(hci_con_handle_t con_handle, uint16_t report_id, const uint8_t * report, uint16_t report_len){ 437 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 438 if (!instance){ 439 log_error("no instance for handle 0x%02x", con_handle); 440 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 441 } 442 443 hids_device_report_t * report_storage = hids_device_get_report_for_type_and_id(instance, HID_REPORT_TYPE_INPUT, report_id); 444 if (report_storage == NULL){ 445 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 446 } 447 448 return att_server_notify(con_handle, report_storage->value_handle, report, report_len); 449 } 450 451 uint8_t hids_device_send_input_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 452 hids_device_t * device = hids_device_get_instance_for_con_handle(con_handle); 453 if (!device){ 454 log_error("no instance for handle 0x%02x", con_handle); 455 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 456 } 457 458 uint8_t pos; 459 uint8_t total_reports = device->hid_input_reports_num + device->hid_output_reports_num + device->hid_feature_reports_num; 460 for (pos = 0 ; pos < total_reports ; pos++){ 461 hids_device_report_t * report_storage = &device->hid_reports[pos]; 462 if (report_storage->type == HID_REPORT_TYPE_INPUT){ 463 return att_server_notify(con_handle, report_storage->value_handle, report, report_len); 464 } 465 } 466 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 467 } 468 469 /** 470 * @brief Send HID Boot Mouse Input Report 471 */ 472 uint8_t hids_device_send_boot_mouse_input_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 473 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 474 if (!instance){ 475 log_error("no instance for handle 0x%02x", con_handle); 476 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 477 } 478 return att_server_notify(con_handle, instance->hid_boot_mouse_input_value_handle, report, report_len); 479 } 480 481 /** 482 * @brief Send HID Boot Mouse Input Report 483 */ 484 uint8_t hids_device_send_boot_keyboard_input_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 485 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 486 if (!instance){ 487 log_error("no instance for handle 0x%02x", con_handle); 488 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 489 } 490 return att_server_notify(con_handle, instance->hid_boot_keyboard_input_value_handle, report, report_len); 491 } 492