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from __future__ import print_function
import re
from sys import stderr
import netsnmp
import netsnmp.client_intf
# control verbosity of error output
verbose = 1
secLevelMap = {'noAuthNoPriv':1, 'authNoPriv':2, 'authPriv':3}
def _parse_session_args(kargs):
sessArgs = {
'Version':3,
'DestHost':'localhost',
'Community':'public',
'Timeout':1000000,
'Retries':3,
'RemotePort':161,
'LocalPort':0,
'SecLevel':'noAuthNoPriv',
'SecName':'initial',
'PrivProto':'DEFAULT',
'PrivPass':'',
'AuthProto':'DEFAULT',
'AuthPass':'',
'ContextEngineId':'',
'SecEngineId':'',
'Context':'',
'Engineboots':0,
'Enginetime':0,
'UseNumeric':0,
'OurIdentity':'',
'TheirIdentity':'',
'TheirHostname':'',
'TrustCert':''
}
keys = list(kargs.keys())
for key in keys:
if key in sessArgs:
sessArgs[key] = kargs[key]
else:
print("ERROR: unknown key", key, file=stderr)
return sessArgs
def STR(obj):
if obj != None:
obj = str(obj)
return obj
def obj_to_str(obj):
return type(obj).__name__ + ":" + str(obj.__dict__)
class Varbind(object):
def __init__(self, tag=None, iid=None, val=None, type_arg=None):
self.tag = STR(tag)
self.iid = STR(iid)
self.val = STR(val)
self.type = STR(type_arg)
# parse iid out of tag if needed
if iid is None and tag is not None:
regex = re.compile(r'^((?:\.\d+)+|(?:\w+(?:[-:]*\w+)+))\.?(.*)$')
match = regex.match(tag)
if match:
(self.tag, self.iid) = match.group(1, 2)
def __setattr__(self, name, val):
self.__dict__[name] = STR(val)
def __str__(self):
return obj_to_str(self)
def print_str(self):
return self.tag, self.iid, self.val, self.type
class VarList(object):
def __init__(self, *vs):
self.varbinds = []
for var in vs:
if isinstance(var, netsnmp.client.Varbind):
self.varbinds.append(var)
else:
self.varbinds.append(Varbind(var))
def __len__(self):
return len(self.varbinds)
def __getitem__(self, index):
return self.varbinds[index]
def __setitem__(self, index, val):
if isinstance(val, netsnmp.client.Varbind):
self.varbinds[index] = val
else:
raise TypeError
def __iter__(self):
return iter(self.varbinds)
def __delitem__(self, index):
del self.varbinds[index]
def __repr__(self):
return repr(self.varbinds)
def __getslice__(self, i, j):
return self.varbinds[i:j]
def __str__(self):
return str([str(v) for v in self.varbinds])
def append(self, *varlist):
for var in varlist:
if isinstance(var, netsnmp.client.Varbind):
self.varbinds.append(var)
else:
raise TypeError
class Session(object):
def __init__(self, **args):
self.sess_ptr = None
self.UseLongNames = 0
self.UseNumeric = 0
self.UseSprintValue = 0
self.UseEnums = 0
self.BestGuess = 0
self.RetryNoSuch = 0
self._clear_error()
sess_args = _parse_session_args(args)
for k, v in list(sess_args.items()):
self.__dict__[k] = v
# check for transports that may be tunneled
transportCheck = re.compile('^(tls|dtls|ssh)')
match = transportCheck.match(sess_args['DestHost'])
if match:
self.sess_ptr = netsnmp.client_intf.session_tunneled(
sess_args['Version'],
sess_args['DestHost'],
sess_args['LocalPort'],
sess_args['Retries'],
sess_args['Timeout'],
sess_args['SecName'],
secLevelMap[sess_args['SecLevel']],
sess_args['ContextEngineId'],
sess_args['Context'],
sess_args['OurIdentity'],
sess_args['TheirIdentity'],
sess_args['TheirHostname'],
sess_args['TrustCert'],
)
elif sess_args['Version'] == 3:
self.sess_ptr = netsnmp.client_intf.session_v3(
sess_args['Version'],
sess_args['DestHost'],
sess_args['LocalPort'],
sess_args['Retries'],
sess_args['Timeout'],
sess_args['SecName'],
secLevelMap[sess_args['SecLevel']],
sess_args['SecEngineId'],
sess_args['ContextEngineId'],
sess_args['Context'],
sess_args['AuthProto'],
sess_args['AuthPass'],
sess_args['PrivProto'],
sess_args['PrivPass'],
sess_args['Engineboots'],
sess_args['Enginetime'])
else:
self.sess_ptr = netsnmp.client_intf.session(
sess_args['Version'],
sess_args['Community'],
sess_args['DestHost'],
sess_args['LocalPort'],
sess_args['Retries'],
sess_args['Timeout'])
def _clear_error(self):
self.ErrorStr = ''
self.ErrorNum = 0
self.ErrorInd = 0
def get(self, varlist):
self._clear_error()
res = netsnmp.client_intf.get(self, varlist)
return res
def set(self, varlist):
self._clear_error()
res = netsnmp.client_intf.set(self, varlist)
return res
def getnext(self, varlist):
self._clear_error()
res = netsnmp.client_intf.getnext(self, varlist)
return res
def getbulk(self, nonrepeaters, maxrepetitions, varlist):
self._clear_error()
if self.Version == 1:
return None
res = netsnmp.client_intf.getbulk(self, nonrepeaters, maxrepetitions, varlist)
return res
def walk(self, varlist):
self._clear_error()
res = netsnmp.client_intf.walk(self, varlist)
return res
def __del__(self):
res = netsnmp.client_intf.delete_session(self)
return res
def __str__(self):
return obj_to_str(self)
def snmpget(*args, **kargs):
sess = Session(**kargs)
var_list = VarList()
for arg in args:
if isinstance(arg, netsnmp.client.Varbind):
var_list.append(arg)
else:
var_list.append(Varbind(arg))
res = sess.get(var_list)
return res
def snmpset(*args, **kargs):
sess = Session(**kargs)
var_list = VarList()
for arg in args:
if isinstance(arg, netsnmp.client.Varbind):
var_list.append(arg)
else:
var_list.append(Varbind(arg))
res = sess.set(var_list)
return res
def snmpgetnext(*args, **kargs):
sess = Session(**kargs)
var_list = VarList()
for arg in args:
if isinstance(arg, netsnmp.client.Varbind):
var_list.append(arg)
else:
var_list.append(Varbind(arg))
res = sess.getnext(var_list)
return res
def snmpgetbulk(nonrepeaters, maxrepetitions, *args, **kargs):
sess = Session(**kargs)
var_list = VarList()
for arg in args:
if isinstance(arg, netsnmp.client.Varbind):
var_list.append(arg)
else:
var_list.append(Varbind(arg))
res = sess.getbulk(nonrepeaters, maxrepetitions, var_list)
return res
def snmpwalk(*args, **kargs):
sess = Session(**kargs)
if isinstance(args[0], netsnmp.client.VarList):
var_list = args[0]
else:
var_list = VarList()
for arg in args:
if isinstance(arg, netsnmp.client.Varbind):
var_list.append(arg)
else:
var_list.append(Varbind(arg))
res = sess.walk(var_list)
return res
|
