使用Pysnmp使用SNMP获取打印机状态

Question

I try to get status from my printer using SNMP protocol The problem is, I've never used the SNMP and I have trouble understanding how can I get my status like ( PAPER OUT, RIBBON OUT, etc... ).

I configured my printer to enable the SNMP protocol using the community name "public"
I presume SNMP messages are sent on the port 161

I'm using Pysnmp because I want to integrate the python script in my program to listen to my printer and display status if there is a problem with the printer.

For now I've tried this code :

import socket
import random
from struct import pack, unpack
from datetime import datetime as dt
from pysnmp.entity.rfc3413.oneliner import cmdgen
from pysnmp.proto.rfc1902 import Integer, IpAddress, OctetString


ip = '172.20.0.229'
community = 'public'
value = (1,3,6,1,2,1,25,3,5,1,2)

generator = cmdgen.CommandGenerator()
comm_data = cmdgen.CommunityData('server', community, 1)  # 1 means version SNMP v2c
transport = cmdgen.UdpTransportTarget((ip, 161))

real_fun = getattr(generator, 'getCmd')
res = (errorIndication, errorStatus, errorIndex, varBinds) \
    = real_fun(comm_data, transport, value)

if not errorIndication is None or errorStatus is True:
    print "Error: %s %s %s %s" % res
else:
    print "%s" % varBinds

The IP address is the IP of my printer The problem is the OID: I don't know what to put in the OID field because I have trouble understanding how does OID work.

I found this page but I'm not sure it fits with all printers ==> click here

Answer 1

You need your printer specific MIB file in common case. Eg, printer in my office seems to be not support both oids by your link. Also you can use snmpwalk to get available oids and values on your printer and if you somehow understand which values you need, you can use it for specific instance of your printer.