All -
I use OpenBSD 4.1 and I use Net-Snmp version : 5.1.3
pgurumur-vm-openbsd (OpenBSD): [~/working/prog/python/snmp]
10.200.0.46: [384]$ net-snmp-config --version
5.1.3
I am trying to write a python module which will do tftp/snmp based backup of
Cisco routers (this currently works with bourne shell script and I want to
change that to python).
When I run this script, I get the following error:
pgurumur-vm-openbsd (OpenBSD): [~/working/prog/python/snmp]
10.200.0.46: [385]$ ./snmp.py -s 10.200.0.105 -v 1 -c "SECRET"
error: set: no type found for objectNone
Exception exceptions.TypeError: 'expected string or Unicode object, NoneType
found' in 'garbage collection' ignored
Fatal Python error: unexpected exception during garbage collection
Abort trap
I know that from test.py python script that I need to set the type to be either
INTEGER, OCTETSTR, GUAGE, etc depending on the OID. But I dont know how to set
the type. I even tried types module under python and it still does not help.
Can anybody give me pointers?
Thanks a lot
Prabhu
-
Here is the python script:
#!/usr/bin/env python2.4
# $Id: snmp.py,v 1.11 2007/06/20 00:51:57 pgurumur Exp $
import random, getopt, re, os, struct, sys, netsnmp, time, types
(dirname, program) = os.path.split(sys.argv[0])
argc = len(sys.argv)
class SNMPError(Exception):
pass
class Snmp:
def __init__(self, HostName, Version, Community):
self._snmpError = SNMPError()
self._host = ""
self._version = ""
self._community = ""
self._snmpSession = 0
self._count = 0
if HostName:
self._host = HostName
else:
raise SNMPError, "no hostname provided"
if Version:
self._version = Version
else:
raise SNMPError, "no version provided"
if Community:
self._community = Community
else:
raise SNMPError, "no community provided"
try:
self._snmpSession = netsnmp.Session(
Version=int(self._version),
DestHost=self._host,
Community=self._community)
except TypeError, message:
raise SNMPError, message
else:
self._snmpSession.UseEnums = 1
self._snmpSession.UseLongNames = 1
def Get(self, Oid, VarId = "0"):
response = ""
if Oid:
vars = netsnmp.VarList(netsnmp.Varbind(Oid, VarId))
if self._snmpSession:
retVal = self._snmpSession.get(vars)
response = retVal[0]
return response
def Set(self, Var):
if Var:
try:
retVal = self._snmpSession.set(Var)
except TypeError, message:
raise SNMPError, message
else:
print retVal
def doBackup(Server, Version, Community):
if Server and Version and Community:
try:
snmp = Snmp(Server, Version, Community)
except SNMPError, message:
error("%s: %s" %(program, message))
else:
randNum = str(random.randint(0, 65535))
# var = netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.14", randNum, 6)
varList = netsnmp.VarList(
netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.14", randNum, 6))
# netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.2", randNum, 1),
# netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.5", randNum,
# ipAddress),
# netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.6", randNum,
# backupFile),
# netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.3", randNum, 4),
# netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.4", randNum, 1),
# netsnmp.Varbind(".1.3.6.1.4.1.9.9.96.1.1.1.1.14", randNum, 1))
try:
snmp.Set(varList)
except SNMPError, message:
print "%s: %s" %(program, message)
sys.exit(1)
def parseCommandLine(Args):
if Args:
try:
opts, args = getopt.getopt(Args, "s:v:c:h",
["server=", "version=", "community=", "help"])
except getopt.GetoptError, message:
print "%s: %s" %(program, message)
usage()
else:
for optind, optarg in opts:
if optind in ("--server", "-s"):
Server = optarg
elif optind in ("--version", "-v"):
Version = optarg
elif optind in ("--community", "-c"):
Community = optarg
elif optind in ("--help", "-h"):
usage()
else:
usage()
doBackup(Server, Version, Community)
def usage():
global program
print "%s: options" %program
print "options: "
print " --server | -s [ name of the host ]"
print " --version | -v [ snmp version to use (1, 2c only) ]"
print " --community | -c [ snmp community ]"
print " --help | -h [ prints this help ]"
sys.exit(1)
def error(Message):
if Message:
global program
print "%s: %s" %(program, Message)
sys.exit(1)
if __name__ == "__main__":
if (argc <= 1):
usage()
else:
parseCommandLine(sys.argv[1:])
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