Format with black
This commit is contained in:
221
agentx/pdu.py
221
agentx/pdu.py
@ -12,10 +12,13 @@ import pprint
|
||||
import logging
|
||||
import agentx
|
||||
|
||||
|
||||
class NullHandler(logging.Handler):
|
||||
def emit(self, record):
|
||||
pass
|
||||
logger = logging.getLogger('agentx.pdu')
|
||||
|
||||
|
||||
logger = logging.getLogger("agentx.pdu")
|
||||
logger.addHandler(NullHandler())
|
||||
|
||||
|
||||
@ -27,34 +30,32 @@ class PDU(object):
|
||||
self.packet_id = 0
|
||||
self.error = agentx.ERROR_NOAGENTXERROR
|
||||
self.error_index = 0
|
||||
self.decode_buf = ''
|
||||
self.decode_buf = ""
|
||||
self.state = {}
|
||||
self.values = []
|
||||
|
||||
def dump(self):
|
||||
name = agentx.PDU_TYPE_NAME[self.type]
|
||||
logger.debug('PDU DUMP: New PDU')
|
||||
logger.debug("PDU DUMP: New PDU")
|
||||
logger.debug(
|
||||
'PDU DUMP: Meta : [%s: %d %d %d]' %
|
||||
(name, self.session_id, self.transaction_id, self.packet_id))
|
||||
if 'payload_length' in self.state:
|
||||
logger.debug('PDU DUMP: Length : %s' %
|
||||
self.state['payload_length'])
|
||||
if hasattr(self, 'response'):
|
||||
logger.debug('PDU DUMP: Response : %s' % self.response)
|
||||
if hasattr(self, 'values'):
|
||||
logger.debug('PDU DUMP: Values : %s' %
|
||||
pprint.pformat(self.values))
|
||||
if hasattr(self, 'range_list'):
|
||||
logger.debug('PDU DUMP: Range list: %s' %
|
||||
pprint.pformat(self.range_list))
|
||||
"PDU DUMP: Meta : [%s: %d %d %d]"
|
||||
% (name, self.session_id, self.transaction_id, self.packet_id)
|
||||
)
|
||||
if "payload_length" in self.state:
|
||||
logger.debug("PDU DUMP: Length : %s" % self.state["payload_length"])
|
||||
if hasattr(self, "response"):
|
||||
logger.debug("PDU DUMP: Response : %s" % self.response)
|
||||
if hasattr(self, "values"):
|
||||
logger.debug("PDU DUMP: Values : %s" % pprint.pformat(self.values))
|
||||
if hasattr(self, "range_list"):
|
||||
logger.debug("PDU DUMP: Range list: %s" % pprint.pformat(self.range_list))
|
||||
|
||||
# ====================================================
|
||||
# encode functions
|
||||
|
||||
def encode_oid(self, oid, include=0):
|
||||
oid = oid.strip()
|
||||
oid = oid.split('.')
|
||||
oid = oid.split(".")
|
||||
oid = [int(i) for i in oid]
|
||||
if len(oid) > 5 and oid[:4] == [1, 3, 6, 1]:
|
||||
# prefix
|
||||
@ -63,66 +64,70 @@ class PDU(object):
|
||||
else:
|
||||
# no prefix
|
||||
prefix = 0
|
||||
buf = struct.pack('BBBB', len(oid), prefix, include, 0)
|
||||
buf = struct.pack("BBBB", len(oid), prefix, include, 0)
|
||||
for i in range(len(oid)):
|
||||
buf += struct.pack('!L', oid[i])
|
||||
buf += struct.pack("!L", oid[i])
|
||||
return buf
|
||||
|
||||
def encode_octet(self, octet):
|
||||
octet = octet.encode("utf-8")
|
||||
buf = struct.pack('!L', len(octet))
|
||||
buf = struct.pack("!L", len(octet))
|
||||
buf += octet
|
||||
padding = (4 - (len(octet) % 4)) % 4
|
||||
buf += chr(0).encode() * padding
|
||||
return buf
|
||||
|
||||
def encode_value(self, type, name, value):
|
||||
buf = struct.pack('!HH', type, 0)
|
||||
buf = struct.pack("!HH", type, 0)
|
||||
buf += self.encode_oid(name)
|
||||
if type in [agentx.TYPE_INTEGER]:
|
||||
buf += struct.pack('!l', value)
|
||||
buf += struct.pack("!l", value)
|
||||
elif type in [
|
||||
agentx.TYPE_COUNTER32, agentx.TYPE_GAUGE32,
|
||||
agentx.TYPE_TIMETICKS
|
||||
agentx.TYPE_COUNTER32,
|
||||
agentx.TYPE_GAUGE32,
|
||||
agentx.TYPE_TIMETICKS,
|
||||
]:
|
||||
buf += struct.pack('!L', value)
|
||||
buf += struct.pack("!L", value)
|
||||
elif type in [agentx.TYPE_COUNTER64]:
|
||||
buf += struct.pack('!Q', value)
|
||||
buf += struct.pack("!Q", value)
|
||||
elif type in [agentx.TYPE_OBJECTIDENTIFIER]:
|
||||
buf += self.encode_oid(value)
|
||||
elif type in [
|
||||
agentx.TYPE_IPADDRESS, agentx.TYPE_OPAQUE,
|
||||
agentx.TYPE_OCTETSTRING
|
||||
agentx.TYPE_IPADDRESS,
|
||||
agentx.TYPE_OPAQUE,
|
||||
agentx.TYPE_OCTETSTRING,
|
||||
]:
|
||||
buf += self.encode_octet(value)
|
||||
elif type in [
|
||||
agentx.TYPE_NULL, agentx.TYPE_NOSUCHOBJECT,
|
||||
agentx.TYPE_NOSUCHINSTANCE, agentx.TYPE_ENDOFMIBVIEW
|
||||
agentx.TYPE_NULL,
|
||||
agentx.TYPE_NOSUCHOBJECT,
|
||||
agentx.TYPE_NOSUCHINSTANCE,
|
||||
agentx.TYPE_ENDOFMIBVIEW,
|
||||
]:
|
||||
# No data
|
||||
pass
|
||||
else:
|
||||
logger.error('Unknown Type:' % type)
|
||||
logger.error("Unknown Type:" % type)
|
||||
return buf
|
||||
|
||||
def encode_header(self, pdu_type, payload_length=0, flags=0):
|
||||
flags = flags | 0x10 # Bit 5 = all ints in NETWORK_BYTE_ORDER
|
||||
buf = struct.pack('BBBB', 1, pdu_type, flags, 0)
|
||||
buf += struct.pack('!L', self.session_id) # sessionID
|
||||
buf += struct.pack('!L', self.transaction_id) # transactionID
|
||||
buf += struct.pack('!L', self.packet_id) # packetID
|
||||
buf += struct.pack('!L', payload_length)
|
||||
buf = struct.pack("BBBB", 1, pdu_type, flags, 0)
|
||||
buf += struct.pack("!L", self.session_id) # sessionID
|
||||
buf += struct.pack("!L", self.transaction_id) # transactionID
|
||||
buf += struct.pack("!L", self.packet_id) # packetID
|
||||
buf += struct.pack("!L", payload_length)
|
||||
return buf
|
||||
|
||||
def encode(self):
|
||||
buf = b''
|
||||
buf = b""
|
||||
if self.type == agentx.AGENTX_OPEN_PDU:
|
||||
# timeout
|
||||
buf += struct.pack('!BBBB', 5, 0, 0, 0)
|
||||
buf += struct.pack("!BBBB", 5, 0, 0, 0)
|
||||
# agent OID
|
||||
buf += struct.pack('!L', 0)
|
||||
buf += struct.pack("!L", 0)
|
||||
# Agent Desc
|
||||
buf += self.encode_octet('MyAgent')
|
||||
buf += self.encode_octet("MyAgent")
|
||||
|
||||
elif self.type == agentx.AGENTX_PING_PDU:
|
||||
# No extra data
|
||||
@ -132,15 +137,14 @@ class PDU(object):
|
||||
range_subid = 0
|
||||
timeout = 5
|
||||
priority = 127
|
||||
buf += struct.pack('BBBB', timeout, priority, range_subid, 0)
|
||||
buf += struct.pack("BBBB", timeout, priority, range_subid, 0)
|
||||
# Sub Tree
|
||||
buf += self.encode_oid(self.oid)
|
||||
|
||||
elif self.type == agentx.AGENTX_RESPONSE_PDU:
|
||||
buf += struct.pack('!LHH', 0, self.error, self.error_index)
|
||||
buf += struct.pack("!LHH", 0, self.error, self.error_index)
|
||||
for value in self.values:
|
||||
buf += self.encode_value(value['type'], value['name'],
|
||||
value['value'])
|
||||
buf += self.encode_value(value["type"], value["name"], value["value"])
|
||||
|
||||
else:
|
||||
# Unsupported PDU type
|
||||
@ -156,27 +160,27 @@ class PDU(object):
|
||||
|
||||
def decode_oid(self):
|
||||
try:
|
||||
t = struct.unpack('!BBBB', self.decode_buf[:4])
|
||||
t = struct.unpack("!BBBB", self.decode_buf[:4])
|
||||
self.decode_buf = self.decode_buf[4:]
|
||||
ret = {
|
||||
'n_subid': t[0],
|
||||
'prefix': t[1],
|
||||
'include': t[2],
|
||||
'reserved': t[3],
|
||||
"n_subid": t[0],
|
||||
"prefix": t[1],
|
||||
"include": t[2],
|
||||
"reserved": t[3],
|
||||
}
|
||||
sub_ids = []
|
||||
if ret['prefix']:
|
||||
if ret["prefix"]:
|
||||
sub_ids = [1, 3, 6, 1]
|
||||
sub_ids.append(ret['prefix'])
|
||||
for i in range(ret['n_subid']):
|
||||
t = struct.unpack('!L', self.decode_buf[:4])
|
||||
sub_ids.append(ret["prefix"])
|
||||
for i in range(ret["n_subid"]):
|
||||
t = struct.unpack("!L", self.decode_buf[:4])
|
||||
self.decode_buf = self.decode_buf[4:]
|
||||
sub_ids.append(t[0])
|
||||
oid = '.'.join(str(i) for i in sub_ids)
|
||||
return oid, ret['include']
|
||||
oid = ".".join(str(i) for i in sub_ids)
|
||||
return oid, ret["include"]
|
||||
except Exception as e:
|
||||
logger.exception('Invalid packing OID header')
|
||||
logger.debug('%s' % pprint.pformat(self.decode_buf))
|
||||
logger.exception("Invalid packing OID header")
|
||||
logger.debug("%s" % pprint.pformat(self.decode_buf))
|
||||
|
||||
def decode_search_range(self):
|
||||
start_oid, include = self.decode_oid()
|
||||
@ -193,115 +197,122 @@ class PDU(object):
|
||||
|
||||
def decode_octet(self):
|
||||
try:
|
||||
t = struct.unpack('!L', self.decode_buf[:4])
|
||||
t = struct.unpack("!L", self.decode_buf[:4])
|
||||
l = t[0]
|
||||
self.decode_buf = self.decode_buf[4:]
|
||||
padding = 4 - (l % 4)
|
||||
buf = self.decode_buf[:l]
|
||||
self.decode_buf = self.decode_buf[l + padding:]
|
||||
self.decode_buf = self.decode_buf[l + padding :]
|
||||
return buf
|
||||
except Exception as e:
|
||||
logger.exception('Invalid packing octet header')
|
||||
logger.exception("Invalid packing octet header")
|
||||
|
||||
def decode_value(self):
|
||||
try:
|
||||
vtype, _ = struct.unpack('!HH', self.decode_buf[:4])
|
||||
vtype, _ = struct.unpack("!HH", self.decode_buf[:4])
|
||||
self.decode_buf = self.decode_buf[4:]
|
||||
except Exception as e:
|
||||
logger.exception('Invalid packing value header')
|
||||
logger.exception("Invalid packing value header")
|
||||
oid, _ = self.decode_oid()
|
||||
if vtype in [
|
||||
agentx.TYPE_INTEGER, agentx.TYPE_COUNTER32,
|
||||
agentx.TYPE_GAUGE32, agentx.TYPE_TIMETICKS
|
||||
agentx.TYPE_INTEGER,
|
||||
agentx.TYPE_COUNTER32,
|
||||
agentx.TYPE_GAUGE32,
|
||||
agentx.TYPE_TIMETICKS,
|
||||
]:
|
||||
data = struct.unpack('!L', self.decode_buf[:4])
|
||||
data = struct.unpack("!L", self.decode_buf[:4])
|
||||
data = data[0]
|
||||
self.decode_buf = self.decode_buf[4:]
|
||||
elif vtype in [agentx.TYPE_COUNTER64]:
|
||||
data = struct.unpack('!Q', self.decode_buf[:8])
|
||||
data = struct.unpack("!Q", self.decode_buf[:8])
|
||||
data = data[0]
|
||||
self.decode_buf = self.decode_buf[8:]
|
||||
elif vtype in [agentx.TYPE_OBJECTIDENTIFIER]:
|
||||
data, _ = self.decode_oid()
|
||||
elif vtype in [
|
||||
agentx.TYPE_IPADDRESS, agentx.TYPE_OPAQUE,
|
||||
agentx.TYPE_OCTETSTRING
|
||||
agentx.TYPE_IPADDRESS,
|
||||
agentx.TYPE_OPAQUE,
|
||||
agentx.TYPE_OCTETSTRING,
|
||||
]:
|
||||
data = self.decode_octet()
|
||||
elif vtype in [
|
||||
agentx.TYPE_NULL, agentx.TYPE_NOSUCHOBJECT,
|
||||
agentx.TYPE_NOSUCHINSTANCE, agentx.TYPE_ENDOFMIBVIEW
|
||||
agentx.TYPE_NULL,
|
||||
agentx.TYPE_NOSUCHOBJECT,
|
||||
agentx.TYPE_NOSUCHINSTANCE,
|
||||
agentx.TYPE_ENDOFMIBVIEW,
|
||||
]:
|
||||
# No data
|
||||
data = None
|
||||
else:
|
||||
logger.error('Unknown Type: %s' % vtype)
|
||||
return {'type': vtype, 'name': oid, 'data': data}
|
||||
logger.error("Unknown Type: %s" % vtype)
|
||||
return {"type": vtype, "name": oid, "data": data}
|
||||
|
||||
def decode_header(self):
|
||||
try:
|
||||
t = struct.unpack('!BBBBLLLL', self.decode_buf[:20])
|
||||
t = struct.unpack("!BBBBLLLL", self.decode_buf[:20])
|
||||
self.decode_buf = self.decode_buf[20:]
|
||||
ret = {
|
||||
'version': t[0],
|
||||
'pdu_type': t[1],
|
||||
'pdu_type_name': agentx.PDU_TYPE_NAME[t[1]],
|
||||
'flags': t[2],
|
||||
'reserved': t[3],
|
||||
'session_id': t[4],
|
||||
'transaction_id': t[5],
|
||||
'packet_id': t[6],
|
||||
'payload_length': t[7],
|
||||
"version": t[0],
|
||||
"pdu_type": t[1],
|
||||
"pdu_type_name": agentx.PDU_TYPE_NAME[t[1]],
|
||||
"flags": t[2],
|
||||
"reserved": t[3],
|
||||
"session_id": t[4],
|
||||
"transaction_id": t[5],
|
||||
"packet_id": t[6],
|
||||
"payload_length": t[7],
|
||||
}
|
||||
self.state = ret
|
||||
self.type = ret['pdu_type']
|
||||
self.session_id = ret['session_id']
|
||||
self.packet_id = ret['packet_id']
|
||||
self.transaction_id = ret['transaction_id']
|
||||
self.decode_buf = self.decode_buf[:ret['payload_length']]
|
||||
if ret['flags'] & 0x08: # content present
|
||||
self.type = ret["pdu_type"]
|
||||
self.session_id = ret["session_id"]
|
||||
self.packet_id = ret["packet_id"]
|
||||
self.transaction_id = ret["transaction_id"]
|
||||
self.decode_buf = self.decode_buf[: ret["payload_length"]]
|
||||
if ret["flags"] & 0x08: # content present
|
||||
context = self.decode_octet()
|
||||
logger.debug('Context: %s' % context)
|
||||
logger.debug("Context: %s" % context)
|
||||
return ret
|
||||
except Exception as e:
|
||||
logger.exception('Invalid packing: %d' % len(self.decode_buf))
|
||||
logger.debug('%s' % pprint.pformat(self.decode_buf))
|
||||
logger.exception("Invalid packing: %d" % len(self.decode_buf))
|
||||
logger.debug("%s" % pprint.pformat(self.decode_buf))
|
||||
|
||||
def decode(self, buf):
|
||||
self.set_decode_buf(buf)
|
||||
ret = self.decode_header()
|
||||
if ret['pdu_type'] == agentx.AGENTX_RESPONSE_PDU:
|
||||
if ret["pdu_type"] == agentx.AGENTX_RESPONSE_PDU:
|
||||
# Decode Response Header
|
||||
t = struct.unpack('!LHH', self.decode_buf[:8])
|
||||
t = struct.unpack("!LHH", self.decode_buf[:8])
|
||||
self.decode_buf = self.decode_buf[8:]
|
||||
self.response = {
|
||||
'sysUpTime': t[0],
|
||||
'error': t[1],
|
||||
'error_name': agentx.ERROR_NAMES[t[1]],
|
||||
'index': t[2],
|
||||
"sysUpTime": t[0],
|
||||
"error": t[1],
|
||||
"error_name": agentx.ERROR_NAMES[t[1]],
|
||||
"index": t[2],
|
||||
}
|
||||
# Decode VarBindList
|
||||
self.values = []
|
||||
while len(self.decode_buf):
|
||||
self.values.append(self.decode_value())
|
||||
|
||||
elif ret['pdu_type'] == agentx.AGENTX_GET_PDU:
|
||||
elif ret["pdu_type"] == agentx.AGENTX_GET_PDU:
|
||||
self.range_list = self.decode_search_range_list()
|
||||
|
||||
elif ret['pdu_type'] == agentx.AGENTX_GETNEXT_PDU:
|
||||
elif ret["pdu_type"] == agentx.AGENTX_GETNEXT_PDU:
|
||||
self.range_list = self.decode_search_range_list()
|
||||
|
||||
elif ret['pdu_type'] == agentx.AGENTX_TESTSET_PDU:
|
||||
elif ret["pdu_type"] == agentx.AGENTX_TESTSET_PDU:
|
||||
# Decode VarBindList
|
||||
self.values = []
|
||||
while len(self.decode_buf):
|
||||
self.values.append(self.decode_value())
|
||||
elif ret['pdu_type'] in [
|
||||
agentx.AGENTX_COMMITSET_PDU, agentx.AGENTX_UNDOSET_PDU,
|
||||
agentx.AGENTX_CLEANUPSET_PDU
|
||||
elif ret["pdu_type"] in [
|
||||
agentx.AGENTX_COMMITSET_PDU,
|
||||
agentx.AGENTX_UNDOSET_PDU,
|
||||
agentx.AGENTX_CLEANUPSET_PDU,
|
||||
]:
|
||||
pass
|
||||
else:
|
||||
pdu_type_str = agentx.PDU_TYPE_NAME.get(
|
||||
ret['pdu_type'], 'Unknown:' + str(ret['pdu_type']))
|
||||
logger.error('Unsupported PDU type:' + pdu_type_str)
|
||||
ret["pdu_type"], "Unknown:" + str(ret["pdu_type"])
|
||||
)
|
||||
logger.error("Unsupported PDU type:" + pdu_type_str)
|
||||
|
Reference in New Issue
Block a user