UndocCall.py

import ctypes
from ctypes.wintypes import DWORD, HANDLE, LPWSTR

k_handle = ctypes.WinDLL("Kernel32.dll")
d_handle = ctypes.WinDLL("DNSAPI.dll")

class DNS_CACHE_ENTRY(ctypes.Structure):
    _fields_ = [
        ("pNext", HANDLE),
        ("recName", LPWSTR),
        ("wType", DWORD),
        ("wDataLength", DWORD),
        ("dwFlags", DWORD),
    ]

print("INFO: Pulling DNS Cache Data from System")
DNS_Entry = DNS_CACHE_ENTRY()
DNS_Entry.wDataLength = 1024
response = d_handle.DnsGetCacheDataTable(ctypes.byref(DNS_Entry))

if response == 0:
    print("Error code: {0}".format(k_handle.GetLastError()))

DNS_Entry = ctypes.cast(DNS_Entry.pNext, ctypes.POINTER(DNS_CACHE_ENTRY))

while True:
    try:
        print("DNS Entry {0} - Type {1}".format(DNS_Entry.contents.recName, DNS_Entry.contents.wType))
        DNS_Entry = ctypes.cast(DNS_Entry.contents.pNext, ctypes.pointer(DNS_CACHE_ENTRY))

    except:
        break