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unleashed-firmware/applications/main/bad_usb/helpers/ducky_script.c
Leo Smith efc52ab469
BdUSBadded WAIT_FOR_BUTTON_PRESS functionality (#2544) 
Co-authored-by: p4p1 <p4p1@vivaldi.net>
Co-authored-by: あく <alleteam@gmail.com>
2023-04-04 11:40:19 +08:00

662 lines
24 KiB
C
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#include <furi.h>
#include <furi_hal.h>
#include <gui/gui.h>
#include <input/input.h>
#include <lib/toolbox/args.h>
#include <furi_hal_usb_hid.h>
#include <storage/storage.h>
#include "ducky_script.h"
#include "ducky_script_i.h"
#include <dolphin/dolphin.h>
#define TAG "BadUSB"
#define WORKER_TAG TAG "Worker"
#define BADUSB_ASCII_TO_KEY(script, x) \
(((uint8_t)x < 128) ? (script->layout[(uint8_t)x]) : HID_KEYBOARD_NONE)
typedef enum {
WorkerEvtToggle = (1 << 0),
WorkerEvtEnd = (1 << 1),
WorkerEvtConnect = (1 << 2),
WorkerEvtDisconnect = (1 << 3),
} WorkerEvtFlags;
static const char ducky_cmd_id[] = {"ID"};
static const uint8_t numpad_keys[10] = {
HID_KEYPAD_0,
HID_KEYPAD_1,
HID_KEYPAD_2,
HID_KEYPAD_3,
HID_KEYPAD_4,
HID_KEYPAD_5,
HID_KEYPAD_6,
HID_KEYPAD_7,
HID_KEYPAD_8,
HID_KEYPAD_9,
};
uint32_t ducky_get_command_len(const char* line) {
uint32_t len = strlen(line);
for(uint32_t i = 0; i < len; i++) {
if(line[i] == ' ') return i;
}
return 0;
}
bool ducky_is_line_end(const char chr) {
return ((chr == ' ') || (chr == '\0') || (chr == '\r') || (chr == '\n'));
}
uint16_t ducky_get_keycode(BadUsbScript* bad_usb, const char* param, bool accept_chars) {
uint16_t keycode = ducky_get_keycode_by_name(param);
if(keycode != HID_KEYBOARD_NONE) {
return keycode;
}
if((accept_chars) && (strlen(param) > 0)) {
return (BADUSB_ASCII_TO_KEY(bad_usb, param[0]) & 0xFF);
}
return 0;
}
bool ducky_get_number(const char* param, uint32_t* val) {
uint32_t value = 0;
if(sscanf(param, "%lu", &value) == 1) {
*val = value;
return true;
}
return false;
}
void ducky_numlock_on() {
if((furi_hal_hid_get_led_state() & HID_KB_LED_NUM) == 0) {
furi_hal_hid_kb_press(HID_KEYBOARD_LOCK_NUM_LOCK);
furi_hal_hid_kb_release(HID_KEYBOARD_LOCK_NUM_LOCK);
}
}
bool ducky_numpad_press(const char num) {
if((num < '0') || (num > '9')) return false;
uint16_t key = numpad_keys[num - '0'];
furi_hal_hid_kb_press(key);
furi_hal_hid_kb_release(key);
return true;
}
bool ducky_altchar(const char* charcode) {
uint8_t i = 0;
bool state = false;
furi_hal_hid_kb_press(KEY_MOD_LEFT_ALT);
while(!ducky_is_line_end(charcode[i])) {
state = ducky_numpad_press(charcode[i]);
if(state == false) break;
i++;
}
furi_hal_hid_kb_release(KEY_MOD_LEFT_ALT);
return state;
}
bool ducky_altstring(const char* param) {
uint32_t i = 0;
bool state = false;
while(param[i] != '\0') {
if((param[i] < ' ') || (param[i] > '~')) {
i++;
continue; // Skip non-printable chars
}
char temp_str[4];
snprintf(temp_str, 4, "%u", param[i]);
state = ducky_altchar(temp_str);
if(state == false) break;
i++;
}
return state;
}
int32_t ducky_error(BadUsbScript* bad_usb, const char* text, ...) {
va_list args;
va_start(args, text);
vsnprintf(bad_usb->st.error, sizeof(bad_usb->st.error), text, args);
va_end(args);
return SCRIPT_STATE_ERROR;
}
bool ducky_string(BadUsbScript* bad_usb, const char* param) {
uint32_t i = 0;
while(param[i] != '\0') {
if(param[i] != '\n') {
uint16_t keycode = BADUSB_ASCII_TO_KEY(bad_usb, param[i]);
if(keycode != HID_KEYBOARD_NONE) {
furi_hal_hid_kb_press(keycode);
furi_hal_hid_kb_release(keycode);
}
} else {
furi_hal_hid_kb_press(HID_KEYBOARD_RETURN);
furi_hal_hid_kb_release(HID_KEYBOARD_RETURN);
}
i++;
}
bad_usb->stringdelay = 0;
return true;
}
static bool ducky_string_next(BadUsbScript* bad_usb) {
if(bad_usb->string_print_pos >= furi_string_size(bad_usb->string_print)) {
return true;
}
char print_char = furi_string_get_char(bad_usb->string_print, bad_usb->string_print_pos);
if(print_char != '\n') {
uint16_t keycode = BADUSB_ASCII_TO_KEY(bad_usb, print_char);
if(keycode != HID_KEYBOARD_NONE) {
furi_hal_hid_kb_press(keycode);
furi_hal_hid_kb_release(keycode);
}
} else {
furi_hal_hid_kb_press(HID_KEYBOARD_RETURN);
furi_hal_hid_kb_release(HID_KEYBOARD_RETURN);
}
bad_usb->string_print_pos++;
return false;
}
static int32_t ducky_parse_line(BadUsbScript* bad_usb, FuriString* line) {
uint32_t line_len = furi_string_size(line);
const char* line_tmp = furi_string_get_cstr(line);
if(line_len == 0) {
return SCRIPT_STATE_NEXT_LINE; // Skip empty lines
}
FURI_LOG_D(WORKER_TAG, "line:%s", line_tmp);
// Ducky Lang Functions
int32_t cmd_result = ducky_execute_cmd(bad_usb, line_tmp);
if(cmd_result != SCRIPT_STATE_CMD_UNKNOWN) {
return cmd_result;
}
// Special keys + modifiers
uint16_t key = ducky_get_keycode(bad_usb, line_tmp, false);
if(key == HID_KEYBOARD_NONE) {
return ducky_error(bad_usb, "No keycode defined for %s", line_tmp);
}
if((key & 0xFF00) != 0) {
// It's a modifier key
line_tmp = &line_tmp[ducky_get_command_len(line_tmp) + 1];
key |= ducky_get_keycode(bad_usb, line_tmp, true);
}
furi_hal_hid_kb_press(key);
furi_hal_hid_kb_release(key);
return 0;
}
static bool ducky_set_usb_id(BadUsbScript* bad_usb, const char* line) {
if(sscanf(line, "%lX:%lX", &bad_usb->hid_cfg.vid, &bad_usb->hid_cfg.pid) == 2) {
bad_usb->hid_cfg.manuf[0] = '\0';
bad_usb->hid_cfg.product[0] = '\0';
uint8_t id_len = ducky_get_command_len(line);
if(!ducky_is_line_end(line[id_len + 1])) {
sscanf(
&line[id_len + 1],
"%31[^\r\n:]:%31[^\r\n]",
bad_usb->hid_cfg.manuf,
bad_usb->hid_cfg.product);
}
FURI_LOG_D(
WORKER_TAG,
"set id: %04lX:%04lX mfr:%s product:%s",
bad_usb->hid_cfg.vid,
bad_usb->hid_cfg.pid,
bad_usb->hid_cfg.manuf,
bad_usb->hid_cfg.product);
return true;
}
return false;
}
static bool ducky_script_preload(BadUsbScript* bad_usb, File* script_file) {
uint8_t ret = 0;
uint32_t line_len = 0;
furi_string_reset(bad_usb->line);
do {
ret = storage_file_read(script_file, bad_usb->file_buf, FILE_BUFFER_LEN);
for(uint16_t i = 0; i < ret; i++) {
if(bad_usb->file_buf[i] == '\n' && line_len > 0) {
bad_usb->st.line_nb++;
line_len = 0;
} else {
if(bad_usb->st.line_nb == 0) { // Save first line
furi_string_push_back(bad_usb->line, bad_usb->file_buf[i]);
}
line_len++;
}
}
if(storage_file_eof(script_file)) {
if(line_len > 0) {
bad_usb->st.line_nb++;
break;
}
}
} while(ret > 0);
const char* line_tmp = furi_string_get_cstr(bad_usb->line);
bool id_set = false; // Looking for ID command at first line
if(strncmp(line_tmp, ducky_cmd_id, strlen(ducky_cmd_id)) == 0) {
id_set = ducky_set_usb_id(bad_usb, &line_tmp[strlen(ducky_cmd_id) + 1]);
}
if(id_set) {
furi_check(furi_hal_usb_set_config(&usb_hid, &bad_usb->hid_cfg));
} else {
furi_check(furi_hal_usb_set_config(&usb_hid, NULL));
}
storage_file_seek(script_file, 0, true);
furi_string_reset(bad_usb->line);
return true;
}
static int32_t ducky_script_execute_next(BadUsbScript* bad_usb, File* script_file) {
int32_t delay_val = 0;
if(bad_usb->repeat_cnt > 0) {
bad_usb->repeat_cnt--;
delay_val = ducky_parse_line(bad_usb, bad_usb->line_prev);
if(delay_val == SCRIPT_STATE_NEXT_LINE) { // Empty line
return 0;
} else if(delay_val == SCRIPT_STATE_STRING_START) { // Print string with delays
return delay_val;
} else if(delay_val == SCRIPT_STATE_WAIT_FOR_BTN) { // wait for button
return delay_val;
} else if(delay_val < 0) { // Script error
bad_usb->st.error_line = bad_usb->st.line_cur - 1;
FURI_LOG_E(WORKER_TAG, "Unknown command at line %u", bad_usb->st.line_cur - 1U);
return SCRIPT_STATE_ERROR;
} else {
return (delay_val + bad_usb->defdelay);
}
}
furi_string_set(bad_usb->line_prev, bad_usb->line);
furi_string_reset(bad_usb->line);
while(1) {
if(bad_usb->buf_len == 0) {
bad_usb->buf_len = storage_file_read(script_file, bad_usb->file_buf, FILE_BUFFER_LEN);
if(storage_file_eof(script_file)) {
if((bad_usb->buf_len < FILE_BUFFER_LEN) && (bad_usb->file_end == false)) {
bad_usb->file_buf[bad_usb->buf_len] = '\n';
bad_usb->buf_len++;
bad_usb->file_end = true;
}
}
bad_usb->buf_start = 0;
if(bad_usb->buf_len == 0) return SCRIPT_STATE_END;
}
for(uint8_t i = bad_usb->buf_start; i < (bad_usb->buf_start + bad_usb->buf_len); i++) {
if(bad_usb->file_buf[i] == '\n' && furi_string_size(bad_usb->line) > 0) {
bad_usb->st.line_cur++;
bad_usb->buf_len = bad_usb->buf_len + bad_usb->buf_start - (i + 1);
bad_usb->buf_start = i + 1;
furi_string_trim(bad_usb->line);
delay_val = ducky_parse_line(bad_usb, bad_usb->line);
if(delay_val == SCRIPT_STATE_NEXT_LINE) { // Empty line
return 0;
} else if(delay_val == SCRIPT_STATE_STRING_START) { // Print string with delays
return delay_val;
} else if(delay_val == SCRIPT_STATE_WAIT_FOR_BTN) { // wait for button
return delay_val;
} else if(delay_val < 0) {
bad_usb->st.error_line = bad_usb->st.line_cur;
FURI_LOG_E(WORKER_TAG, "Unknown command at line %u", bad_usb->st.line_cur);
return SCRIPT_STATE_ERROR;
} else {
return (delay_val + bad_usb->defdelay);
}
} else {
furi_string_push_back(bad_usb->line, bad_usb->file_buf[i]);
}
}
bad_usb->buf_len = 0;
if(bad_usb->file_end) return SCRIPT_STATE_END;
}
return 0;
}
static void bad_usb_hid_state_callback(bool state, void* context) {
furi_assert(context);
BadUsbScript* bad_usb = context;
if(state == true) {
furi_thread_flags_set(furi_thread_get_id(bad_usb->thread), WorkerEvtConnect);
} else {
furi_thread_flags_set(furi_thread_get_id(bad_usb->thread), WorkerEvtDisconnect);
}
}
static uint32_t bad_usb_flags_get(uint32_t flags_mask, uint32_t timeout) {
uint32_t flags = furi_thread_flags_get();
furi_check((flags & FuriFlagError) == 0);
if(flags == 0) {
flags = furi_thread_flags_wait(flags_mask, FuriFlagWaitAny, timeout);
furi_check(((flags & FuriFlagError) == 0) || (flags == (unsigned)FuriFlagErrorTimeout));
} else {
uint32_t state = furi_thread_flags_clear(flags);
furi_check((state & FuriFlagError) == 0);
}
return flags;
}
static int32_t bad_usb_worker(void* context) {
BadUsbScript* bad_usb = context;
BadUsbWorkerState worker_state = BadUsbStateInit;
int32_t delay_val = 0;
FURI_LOG_I(WORKER_TAG, "Init");
File* script_file = storage_file_alloc(furi_record_open(RECORD_STORAGE));
bad_usb->line = furi_string_alloc();
bad_usb->line_prev = furi_string_alloc();
bad_usb->string_print = furi_string_alloc();
furi_hal_hid_set_state_callback(bad_usb_hid_state_callback, bad_usb);
while(1) {
if(worker_state == BadUsbStateInit) { // State: initialization
if(storage_file_open(
script_file,
furi_string_get_cstr(bad_usb->file_path),
FSAM_READ,
FSOM_OPEN_EXISTING)) {
if((ducky_script_preload(bad_usb, script_file)) && (bad_usb->st.line_nb > 0)) {
if(furi_hal_hid_is_connected()) {
worker_state = BadUsbStateIdle; // Ready to run
} else {
worker_state = BadUsbStateNotConnected; // USB not connected
}
} else {
worker_state = BadUsbStateScriptError; // Script preload error
}
} else {
FURI_LOG_E(WORKER_TAG, "File open error");
worker_state = BadUsbStateFileError; // File open error
}
bad_usb->st.state = worker_state;
} else if(worker_state == BadUsbStateNotConnected) { // State: USB not connected
uint32_t flags = bad_usb_flags_get(
WorkerEvtEnd | WorkerEvtConnect | WorkerEvtToggle, FuriWaitForever);
if(flags & WorkerEvtEnd) {
break;
} else if(flags & WorkerEvtConnect) {
worker_state = BadUsbStateIdle; // Ready to run
} else if(flags & WorkerEvtToggle) {
worker_state = BadUsbStateWillRun; // Will run when USB is connected
}
bad_usb->st.state = worker_state;
} else if(worker_state == BadUsbStateIdle) { // State: ready to start
uint32_t flags = bad_usb_flags_get(
WorkerEvtEnd | WorkerEvtToggle | WorkerEvtDisconnect, FuriWaitForever);
if(flags & WorkerEvtEnd) {
break;
} else if(flags & WorkerEvtToggle) { // Start executing script
DOLPHIN_DEED(DolphinDeedBadUsbPlayScript);
delay_val = 0;
bad_usb->buf_len = 0;
bad_usb->st.line_cur = 0;
bad_usb->defdelay = 0;
bad_usb->stringdelay = 0;
bad_usb->repeat_cnt = 0;
bad_usb->key_hold_nb = 0;
bad_usb->file_end = false;
storage_file_seek(script_file, 0, true);
worker_state = BadUsbStateRunning;
} else if(flags & WorkerEvtDisconnect) {
worker_state = BadUsbStateNotConnected; // USB disconnected
}
bad_usb->st.state = worker_state;
} else if(worker_state == BadUsbStateWillRun) { // State: start on connection
uint32_t flags = bad_usb_flags_get(
WorkerEvtEnd | WorkerEvtConnect | WorkerEvtToggle, FuriWaitForever);
if(flags & WorkerEvtEnd) {
break;
} else if(flags & WorkerEvtConnect) { // Start executing script
DOLPHIN_DEED(DolphinDeedBadUsbPlayScript);
delay_val = 0;
bad_usb->buf_len = 0;
bad_usb->st.line_cur = 0;
bad_usb->defdelay = 0;
bad_usb->stringdelay = 0;
bad_usb->repeat_cnt = 0;
bad_usb->file_end = false;
storage_file_seek(script_file, 0, true);
// extra time for PC to recognize Flipper as keyboard
flags = furi_thread_flags_wait(
WorkerEvtEnd | WorkerEvtDisconnect | WorkerEvtToggle,
FuriFlagWaitAny | FuriFlagNoClear,
1500);
if(flags == (unsigned)FuriFlagErrorTimeout) {
// If nothing happened - start script execution
worker_state = BadUsbStateRunning;
} else if(flags & WorkerEvtToggle) {
worker_state = BadUsbStateIdle;
furi_thread_flags_clear(WorkerEvtToggle);
}
} else if(flags & WorkerEvtToggle) { // Cancel scheduled execution
worker_state = BadUsbStateNotConnected;
}
bad_usb->st.state = worker_state;
} else if(worker_state == BadUsbStateRunning) { // State: running
uint16_t delay_cur = (delay_val > 1000) ? (1000) : (delay_val);
uint32_t flags = furi_thread_flags_wait(
WorkerEvtEnd | WorkerEvtToggle | WorkerEvtDisconnect, FuriFlagWaitAny, delay_cur);
delay_val -= delay_cur;
if(!(flags & FuriFlagError)) {
if(flags & WorkerEvtEnd) {
break;
} else if(flags & WorkerEvtToggle) {
worker_state = BadUsbStateIdle; // Stop executing script
furi_hal_hid_kb_release_all();
} else if(flags & WorkerEvtDisconnect) {
worker_state = BadUsbStateNotConnected; // USB disconnected
furi_hal_hid_kb_release_all();
}
bad_usb->st.state = worker_state;
continue;
} else if(
(flags == (unsigned)FuriFlagErrorTimeout) ||
(flags == (unsigned)FuriFlagErrorResource)) {
if(delay_val > 0) {
bad_usb->st.delay_remain--;
continue;
}
bad_usb->st.state = BadUsbStateRunning;
delay_val = ducky_script_execute_next(bad_usb, script_file);
if(delay_val == SCRIPT_STATE_ERROR) { // Script error
delay_val = 0;
worker_state = BadUsbStateScriptError;
bad_usb->st.state = worker_state;
furi_hal_hid_kb_release_all();
} else if(delay_val == SCRIPT_STATE_END) { // End of script
delay_val = 0;
worker_state = BadUsbStateIdle;
bad_usb->st.state = BadUsbStateDone;
furi_hal_hid_kb_release_all();
continue;
} else if(delay_val == SCRIPT_STATE_STRING_START) { // Start printing string with delays
delay_val = bad_usb->defdelay;
bad_usb->string_print_pos = 0;
worker_state = BadUsbStateStringDelay;
} else if(delay_val == SCRIPT_STATE_WAIT_FOR_BTN) { // set state to wait for user input
worker_state = BadUsbStateWaitForBtn;
bad_usb->st.state = BadUsbStateWaitForBtn; // Show long delays
} else if(delay_val > 1000) {
bad_usb->st.state = BadUsbStateDelay; // Show long delays
bad_usb->st.delay_remain = delay_val / 1000;
}
} else {
furi_check((flags & FuriFlagError) == 0);
}
} else if(worker_state == BadUsbStateWaitForBtn) { // State: Wait for button Press
uint16_t delay_cur = (delay_val > 1000) ? (1000) : (delay_val);
uint32_t flags = furi_thread_flags_wait(
WorkerEvtEnd | WorkerEvtToggle | WorkerEvtDisconnect, FuriFlagWaitAny, delay_cur);
if(!(flags & FuriFlagError)) {
if(flags & WorkerEvtEnd) {
break;
} else if(flags & WorkerEvtToggle) {
delay_val = 0;
worker_state = BadUsbStateRunning;
} else if(flags & WorkerEvtDisconnect) {
worker_state = BadUsbStateNotConnected; // USB disconnected
furi_hal_hid_kb_release_all();
}
bad_usb->st.state = worker_state;
continue;
}
} else if(worker_state == BadUsbStateStringDelay) { // State: print string with delays
uint32_t flags = furi_thread_flags_wait(
WorkerEvtEnd | WorkerEvtToggle | WorkerEvtDisconnect,
FuriFlagWaitAny,
bad_usb->stringdelay);
if(!(flags & FuriFlagError)) {
if(flags & WorkerEvtEnd) {
break;
} else if(flags & WorkerEvtToggle) {
worker_state = BadUsbStateIdle; // Stop executing script
furi_hal_hid_kb_release_all();
} else if(flags & WorkerEvtDisconnect) {
worker_state = BadUsbStateNotConnected; // USB disconnected
furi_hal_hid_kb_release_all();
}
bad_usb->st.state = worker_state;
continue;
} else if(
(flags == (unsigned)FuriFlagErrorTimeout) ||
(flags == (unsigned)FuriFlagErrorResource)) {
bool string_end = ducky_string_next(bad_usb);
if(string_end) {
bad_usb->stringdelay = 0;
worker_state = BadUsbStateRunning;
}
} else {
furi_check((flags & FuriFlagError) == 0);
}
} else if(
(worker_state == BadUsbStateFileError) ||
(worker_state == BadUsbStateScriptError)) { // State: error
uint32_t flags =
bad_usb_flags_get(WorkerEvtEnd, FuriWaitForever); // Waiting for exit command
if(flags & WorkerEvtEnd) {
break;
}
}
}
furi_hal_hid_set_state_callback(NULL, NULL);
storage_file_close(script_file);
storage_file_free(script_file);
furi_string_free(bad_usb->line);
furi_string_free(bad_usb->line_prev);
furi_string_free(bad_usb->string_print);
FURI_LOG_I(WORKER_TAG, "End");
return 0;
}
static void bad_usb_script_set_default_keyboard_layout(BadUsbScript* bad_usb) {
furi_assert(bad_usb);
memset(bad_usb->layout, HID_KEYBOARD_NONE, sizeof(bad_usb->layout));
memcpy(bad_usb->layout, hid_asciimap, MIN(sizeof(hid_asciimap), sizeof(bad_usb->layout)));
}
BadUsbScript* bad_usb_script_open(FuriString* file_path) {
furi_assert(file_path);
BadUsbScript* bad_usb = malloc(sizeof(BadUsbScript));
bad_usb->file_path = furi_string_alloc();
furi_string_set(bad_usb->file_path, file_path);
bad_usb_script_set_default_keyboard_layout(bad_usb);
bad_usb->st.state = BadUsbStateInit;
bad_usb->st.error[0] = '\0';
bad_usb->thread = furi_thread_alloc_ex("BadUsbWorker", 2048, bad_usb_worker, bad_usb);
furi_thread_start(bad_usb->thread);
return bad_usb;
} //-V773
void bad_usb_script_close(BadUsbScript* bad_usb) {
furi_assert(bad_usb);
furi_thread_flags_set(furi_thread_get_id(bad_usb->thread), WorkerEvtEnd);
furi_thread_join(bad_usb->thread);
furi_thread_free(bad_usb->thread);
furi_string_free(bad_usb->file_path);
free(bad_usb);
}
void bad_usb_script_set_keyboard_layout(BadUsbScript* bad_usb, FuriString* layout_path) {
furi_assert(bad_usb);
if((bad_usb->st.state == BadUsbStateRunning) || (bad_usb->st.state == BadUsbStateDelay)) {
// do not update keyboard layout while a script is running
return;
}
File* layout_file = storage_file_alloc(furi_record_open(RECORD_STORAGE));
if(!furi_string_empty(layout_path)) { //-V1051
if(storage_file_open(
layout_file, furi_string_get_cstr(layout_path), FSAM_READ, FSOM_OPEN_EXISTING)) {
uint16_t layout[128];
if(storage_file_read(layout_file, layout, sizeof(layout)) == sizeof(layout)) {
memcpy(bad_usb->layout, layout, sizeof(layout));
}
}
storage_file_close(layout_file);
} else {
bad_usb_script_set_default_keyboard_layout(bad_usb);
}
storage_file_free(layout_file);
}
void bad_usb_script_toggle(BadUsbScript* bad_usb) {
furi_assert(bad_usb);
furi_thread_flags_set(furi_thread_get_id(bad_usb->thread), WorkerEvtToggle);
}
BadUsbState* bad_usb_script_get_state(BadUsbScript* bad_usb) {
furi_assert(bad_usb);
return &(bad_usb->st);
}
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