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import struct
import sys
import win32wnet
# Constants generated by h2py from nb30.h
NCBNAMSZ = 16
MAX_LANA = 254
NAME_FLAGS_MASK = 0x87
GROUP_NAME = 0x80
UNIQUE_NAME = 0x00
REGISTERING = 0x00
REGISTERED = 0x04
DEREGISTERED = 0x05
DUPLICATE = 0x06
DUPLICATE_DEREG = 0x07
LISTEN_OUTSTANDING = 0x01
CALL_PENDING = 0x02
SESSION_ESTABLISHED = 0x03
HANGUP_PENDING = 0x04
HANGUP_COMPLETE = 0x05
SESSION_ABORTED = 0x06
ALL_TRANSPORTS = "M\0\0\0"
MS_NBF = "MNBF"
NCBCALL = 0x10
NCBLISTEN = 0x11
NCBHANGUP = 0x12
NCBSEND = 0x14
NCBRECV = 0x15
NCBRECVANY = 0x16
NCBCHAINSEND = 0x17
NCBDGSEND = 0x20
NCBDGRECV = 0x21
NCBDGSENDBC = 0x22
NCBDGRECVBC = 0x23
NCBADDNAME = 0x30
NCBDELNAME = 0x31
NCBRESET = 0x32
NCBASTAT = 0x33
NCBSSTAT = 0x34
NCBCANCEL = 0x35
NCBADDGRNAME = 0x36
NCBENUM = 0x37
NCBUNLINK = 0x70
NCBSENDNA = 0x71
NCBCHAINSENDNA = 0x72
NCBLANSTALERT = 0x73
NCBACTION = 0x77
NCBFINDNAME = 0x78
NCBTRACE = 0x79
ASYNCH = 0x80
NRC_GOODRET = 0x00
NRC_BUFLEN = 0x01
NRC_ILLCMD = 0x03
NRC_CMDTMO = 0x05
NRC_INCOMP = 0x06
NRC_BADDR = 0x07
NRC_SNUMOUT = 0x08
NRC_NORES = 0x09
NRC_SCLOSED = 0x0A
NRC_CMDCAN = 0x0B
NRC_DUPNAME = 0x0D
NRC_NAMTFUL = 0x0E
NRC_ACTSES = 0x0F
NRC_LOCTFUL = 0x11
NRC_REMTFUL = 0x12
NRC_ILLNN = 0x13
NRC_NOCALL = 0x14
NRC_NOWILD = 0x15
NRC_INUSE = 0x16
NRC_NAMERR = 0x17
NRC_SABORT = 0x18
NRC_NAMCONF = 0x19
NRC_IFBUSY = 0x21
NRC_TOOMANY = 0x22
NRC_BRIDGE = 0x23
NRC_CANOCCR = 0x24
NRC_CANCEL = 0x26
NRC_DUPENV = 0x30
NRC_ENVNOTDEF = 0x34
NRC_OSRESNOTAV = 0x35
NRC_MAXAPPS = 0x36
NRC_NOSAPS = 0x37
NRC_NORESOURCES = 0x38
NRC_INVADDRESS = 0x39
NRC_INVDDID = 0x3B
NRC_LOCKFAIL = 0x3C
NRC_OPENERR = 0x3F
NRC_SYSTEM = 0x40
NRC_PENDING = 0xFF
UCHAR = "B"
WORD = "H"
DWORD = "I"
USHORT = "H"
ULONG = "I"
ADAPTER_STATUS_ITEMS = [
("6s", "adapter_address"),
(UCHAR, "rev_major"),
(UCHAR, "reserved0"),
(UCHAR, "adapter_type"),
(UCHAR, "rev_minor"),
(WORD, "duration"),
(WORD, "frmr_recv"),
(WORD, "frmr_xmit"),
(WORD, "iframe_recv_err"),
(WORD, "xmit_aborts"),
(DWORD, "xmit_success"),
(DWORD, "recv_success"),
(WORD, "iframe_xmit_err"),
(WORD, "recv_buff_unavail"),
(WORD, "t1_timeouts"),
(WORD, "ti_timeouts"),
(DWORD, "reserved1"),
(WORD, "free_ncbs"),
(WORD, "max_cfg_ncbs"),
(WORD, "max_ncbs"),
(WORD, "xmit_buf_unavail"),
(WORD, "max_dgram_size"),
(WORD, "pending_sess"),
(WORD, "max_cfg_sess"),
(WORD, "max_sess"),
(WORD, "max_sess_pkt_size"),
(WORD, "name_count"),
]
NAME_BUFFER_ITEMS = [
(str(NCBNAMSZ) + "s", "name"),
(UCHAR, "name_num"),
(UCHAR, "name_flags"),
]
SESSION_HEADER_ITEMS = [
(UCHAR, "sess_name"),
(UCHAR, "num_sess"),
(UCHAR, "rcv_dg_outstanding"),
(UCHAR, "rcv_any_outstanding"),
]
SESSION_BUFFER_ITEMS = [
(UCHAR, "lsn"),
(UCHAR, "state"),
(str(NCBNAMSZ) + "s", "local_name"),
(str(NCBNAMSZ) + "s", "remote_name"),
(UCHAR, "rcvs_outstanding"),
(UCHAR, "sends_outstanding"),
]
LANA_ENUM_ITEMS = [
("B", "length"), # Number of valid entries in lana[]
(str(MAX_LANA + 1) + "s", "lana"),
]
FIND_NAME_HEADER_ITEMS = [
(WORD, "node_count"),
(UCHAR, "reserved"),
(UCHAR, "unique_group"),
]
FIND_NAME_BUFFER_ITEMS = [
(UCHAR, "length"),
(UCHAR, "access_control"),
(UCHAR, "frame_control"),
("6s", "destination_addr"),
("6s", "source_addr"),
("18s", "routing_info"),
]
ACTION_HEADER_ITEMS = [
(ULONG, "transport_id"),
(USHORT, "action_code"),
(USHORT, "reserved"),
]
del UCHAR, WORD, DWORD, USHORT, ULONG
NCB = win32wnet.NCB
def Netbios(ncb):
ob = ncb.Buffer
is_ours = hasattr(ob, "_pack")
if is_ours:
ob._pack()
try:
return win32wnet.Netbios(ncb)
finally:
if is_ours:
ob._unpack()
class NCBStruct:
def __init__(self, items):
self._format = "".join([item[0] for item in items])
self._items = items
self._buffer_ = win32wnet.NCBBuffer(struct.calcsize(self._format))
for format, name in self._items:
if len(format) == 1:
if format == "c":
val = "\0"
else:
val = 0
else:
l = int(format[:-1])
val = "\0" * l
self.__dict__[name] = val
def _pack(self):
vals = []
for format, name in self._items:
try:
vals.append(self.__dict__[name])
except KeyError:
vals.append(None)
self._buffer_[:] = struct.pack(*(self._format,) + tuple(vals))
def _unpack(self):
items = struct.unpack(self._format, self._buffer_)
assert len(items) == len(self._items), "unexpected number of items to unpack!"
for (format, name), val in zip(self._items, items):
self.__dict__[name] = val
def __setattr__(self, attr, val):
if attr not in self.__dict__ and attr[0] != "_":
for format, attr_name in self._items:
if attr == attr_name:
break
else:
raise AttributeError(attr)
self.__dict__[attr] = val
def ADAPTER_STATUS():
return NCBStruct(ADAPTER_STATUS_ITEMS)
def NAME_BUFFER():
return NCBStruct(NAME_BUFFER_ITEMS)
def SESSION_HEADER():
return NCBStruct(SESSION_HEADER_ITEMS)
def SESSION_BUFFER():
return NCBStruct(SESSION_BUFFER_ITEMS)
def LANA_ENUM():
return NCBStruct(LANA_ENUM_ITEMS)
def FIND_NAME_HEADER():
return NCBStruct(FIND_NAME_HEADER_ITEMS)
def FIND_NAME_BUFFER():
return NCBStruct(FIND_NAME_BUFFER_ITEMS)
def ACTION_HEADER():
return NCBStruct(ACTION_HEADER_ITEMS)
def byte_to_int(b):
"""Given an element in a binary buffer, return its integer value"""
if sys.version_info >= (3, 0):
# a byte is already an int in py3k
return b
return ord(b) # its a char from a string in py2k.
if __name__ == "__main__":
# code ported from "HOWTO: Get the MAC Address for an Ethernet Adapter"
# MS KB ID: Q118623
ncb = NCB()
ncb.Command = NCBENUM
la_enum = LANA_ENUM()
ncb.Buffer = la_enum
rc = Netbios(ncb)
if rc != 0:
raise RuntimeError("Unexpected result %d" % (rc,))
for i in range(la_enum.length):
ncb.Reset()
ncb.Command = NCBRESET
ncb.Lana_num = byte_to_int(la_enum.lana[i])
rc = Netbios(ncb)
if rc != 0:
raise RuntimeError("Unexpected result %d" % (rc,))
ncb.Reset()
ncb.Command = NCBASTAT
ncb.Lana_num = byte_to_int(la_enum.lana[i])
ncb.Callname = "* ".encode("ascii") # ensure bytes on py2x and 3k
adapter = ADAPTER_STATUS()
ncb.Buffer = adapter
Netbios(ncb)
print("Adapter address:", end=" ")
for ch in adapter.adapter_address:
print("%02x" % (byte_to_int(ch),), end=" ")
print()