我的python代码如下
#!/usr/bin/env python
from __future__ import print_function
import argparse
import string
import struct
import sys
import win32api
import win32file
import pywintypes
def CTL_CODE(DeviceType, Function, Method, Access):
return (DeviceType << 16) | (Access << 14) | (Function << 2) | Method
def USB_CTL(id):
# CTL_CODE(FILE_DEVICE_USB, (id), METHOD_BUFFERED, FILE_ANY_ACCESS)
return CTL_CODE(0x22, id, 0, 0)
IOCTL_USB_GET_ROOT_HUB_NAME = USB_CTL(258) # HCD_GET_ROOT_HUB_NAME
IOCTL_USB_GET_NODE_INFORMATION = USB_CTL(258) # USB_GET_NODE_INFORMATION
IOCTL_USB_GET_NODE_CONNECTION_INFORMATION = USB_CTL(259) # USB_GET_NODE_CONNECTION_INFORMATION
IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME = USB_CTL(264) # USB_GET_NODE_CONNECTION_DRIVERKEY_NAME
IOCTL_USB_GET_NODE_CONNECTION_NAME = USB_CTL(261) # USB_GET_NODE_CONNECTION_NAME
IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION = USB_CTL(260) # USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION
USB_CONFIGURATION_DESCRIPTOR_TYPE = 2
USB_STRING_DESCRIPTOR_TYPE = 3
USB_INTERFACE_DESCRIPTOR_TYPE = 4
MAXIMUM_USB_STRING_LENGTH = 255
def open_dev(name):
try:
handle = win32file.CreateFile(name,
win32file.GENERIC_WRITE,
win32file.FILE_SHARE_WRITE,
None,
win32file.OPEN_EXISTING,
0,
None)
except pywintypes.error as e:
return None
return handle
def get_root_hub_name(handle):
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_ROOT_HUB_NAME,
None,
6,
None)
act_len, _ = struct.unpack('LH', buf)
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_ROOT_HUB_NAME,
None,
act_len,
None)
return buf[4:].decode('utf-16le')
def get_driverkey_name(handle, index):
key_name = chr(index) + '\0'*9
try:
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME,
key_name,
10,
None)
except pywintypes.error as e:
print(e.strerror, index)
sys.exit(1)
_, act_len, _ = struct.unpack('LLH', buf)
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME,
key_name,
act_len,
None)
return buf[8:].decode('utf-16le')
def get_ext_hub_name(handle, index):
hub_name = chr(index) + '\0'*9
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_NODE_CONNECTION_NAME,
hub_name,
10,
None)
_, act_len, _ = struct.unpack('LLH', buf)
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_NODE_CONNECTION_NAME,
hub_name,
act_len,
None)
return buf[8:].decode('utf-16le')
def get_str_desc(handle, conn_idx, str_idx):
req = struct.pack('LBBHHH',
conn_idx,
0,
0,
(USB_STRING_DESCRIPTOR_TYPE<<8) | str_idx,
win32api.GetSystemDefaultLangID(),
12+MAXIMUM_USB_STRING_LENGTH)
try:
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
req,
12+MAXIMUM_USB_STRING_LENGTH,
None)
except pywintypes.error as e:
return 'ERROR: no String Descriptor for index {}'.format(str_idx)
if len(buf) > 16:
return buf[14:].decode('utf-16le')
return ''
def exam_hub(name, verbose, level):
handle = open_dev(r'\\.\{}'.format(name))
if not handle:
print('Failed to open device {}'.format(name))
return
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_NODE_INFORMATION,
None,
76,
None)
print_hub_ports(handle, ord(buf[6]), verbose, level)
handle.close()
def print_str_or_hex(to_be_print):
if all(c in string.printable for c in to_be_print):
print('"{}"'.format(to_be_print))
return
print('Hex: ', end='')
for x in to_be_print:
print('{:02x} '.format(ord(x)), end='')
print('')
def print_hub_ports(handle, num_ports, verbose, level):
for idx in range(1, num_ports+1):
info = chr(idx) + '\0'*34
try:
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_NODE_CONNECTION_INFORMATION,
info,
34 + 11*30,
None)
except pywintypes.error as e:
print(e.winerror, e.funcname, e.strerror)
return
_, vid, pid, vers, manu, prod, seri, _, ishub, _, stat = struct.unpack('=12sHHHBBB3s?6sL', buf[:35])
if ishub:
if verbose:
print('{} [Port{}] {}'.format(' '*level, idx, 'USB Hub'))
exam_hub(get_ext_hub_name(handle, idx), verbose, level)
elif stat == 0 and verbose:
print('{} [Port{}] {}'.format(' '*level, idx, 'NoDeviceConnected'))
elif stat == 1:
if verbose or (manu != 0 or prod != 0 or seri != 0):
print('{} [Port{}] {}'.format(' '*level, idx, get_driverkey_name(handle, idx)))
print('{} Vendor ID: 0x{:04X}'.format(' '*level, vid))
print('{} Product ID: 0x{:04X}'.format(' '*level, pid))
print('{} Device BCD: 0x{:04X}'.format(' '*level, vers))
if manu != 0:
print('{} Manufacturer (0x{:x}) -> '.format(' '*level, manu), end='')
print_str_or_hex(get_str_desc(handle, idx, manu))
if prod != 0:
print('{} Product (0x{:x}) -> '.format(' '*level, prod), end='')
print_str_or_hex(get_str_desc(handle, idx, prod))
if seri != 0:
print('{} Serial No (0x{:x}) -> '.format(' '*level, seri), end='')
print_str_or_hex(get_str_desc(handle, idx, seri))
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-v', '--verbose', action='store_true',
help="Increase output verbosity.")
args = parser.parse_args()
for i in range(10):
name = r"\\.\HCD{}".format(i)
handle = open_dev(name)
if not handle:
continue
root = get_root_hub_name(handle)
print('{}RootHub: {}'.format('\n' if i != 0 else '', root))
dev_name = r'\\.\{}'.format(root)
dev_handle = open_dev(dev_name)
if not dev_handle:
print('Failed to open device {}'.format(dev_name))
continue
buf = win32file.DeviceIoControl(dev_handle,
IOCTL_USB_GET_NODE_INFORMATION,
None,
76,
None)
print_hub_ports(dev_handle, ord(buf[6]), args.verbose, 0)
dev_handle.close()
handle.close()
if __name__ == '__main__':
main()
并且返回：
RootHub：USB＃ROOT_HUB20＃4＆amp; 2c86c80d＆amp; 0＃{f18a0e88-c30c-11d0-8815-00a0c906bed8}
[Port2] {36fc9e60-c465-11cf-8056-444553540000} \ 0009
供应商ID：0x2232
产品编号：0x6001
设备BCD：0x0002
制造商（0x1） - ＆gt; “错误：索引1没有字符串描述符”
产品（0x2） - ＆gt; “错误：索引2没有字符串描述符”
问题是：我如何获得制造商和产品编号？
答案 0 :(得分：0)
此设备可能不提供任何字符串描述符。
尽管字符串描述符（iManufacturer，iProduct，iSerialNumber）的索引应为零以显示没有字符串，但很多设备都会报告错误（非零）索引，就像您所看到的那样。我相信除了要求供应商帮助升级其固件之外，你无能为力。
但是，供应商ID和产品ID正在提供您所需的信息。 供应商ID 0x2232将是Silicon Motion和产品ID 0x6001我不确定它是什么，也许你需要与供应商核实这一点。
答案 1 :(得分：0)
您的代码非常接近于您想要的（以及我需要的）。问题在于打包的iocontrolcode结构中传递的缓冲区长度。它必须是MAXIMUM_USB_STRING_LENGTH而不是12+MAXIMUM_USB_STRING_LENGTH，如下所示
请注意，我在代码中留下了注释掉的print(e)语句。这指出了问题，因为生成的错误消息抱怨缓冲区大小不正确。
def get_str_desc(handle, conn_idx, str_idx):
req = struct.pack('LBBHHH',
conn_idx,
0,
0,
(USB_STRING_DESCRIPTOR_TYPE<<8) | str_idx,
win32api.GetSystemDefaultLangID(),
MAXIMUM_USB_STRING_LENGTH)
try:
buf = win32file.DeviceIoControl(handle,
IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
req,
12+MAXIMUM_USB_STRING_LENGTH,
None)
except pywintypes.error as e:
#print(e)
return 'ERROR: no String Descriptor for index {}'.format(str_idx)
if len(buf) > 16:
return buf[14:].decode('utf-16le')
return ''
通过此更改，现在将显示制造商，产品和串行字符串（如果可用）。