PYSNMP无法读取自定义windows MIB

Question

我尝试使用PYSNMP从Windows加载System32（HOST-Resources_MIB）中生成的自定义MIB文件

代码如下：

from pysnmp.hlapi import *
from pysmi import debug as pysmi_debug
pysmi_debug.setLogger(pysmi_debug.Debug('compiler'))

errorIndication, errorStatus, errorIndex, varBinds = next(
    getCmd(SnmpEngine(),
           CommunityData('public', mpModel=0),
           UdpTransportTarget(('localhost', 161)),
           ContextData(),
           ObjectType(ObjectIdentity('HOST-RESOURCES-MIB', 'hrSystemUptime', 0).addAsn1MibSource('file:C:/Users/Fusse/Desktop/SNMP/')))
)

if errorIndication:
    print(errorIndication)
elif errorStatus:
    print('%s at %s' % (errorStatus.prettyPrint(),
                        errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
else:
    for varBind in varBinds:
        print(' = '.join([x.prettyPrint() for x in varBind]))

我收到一个与无法读取的主机对象标识符相关的错误：

2020-06-10 13:06:22,601 pysmi: current MIB borrower(s):
2020-06-10 13:06:22,603 pysmi: trying source FileReader{"C:\Users\Fusse\Desktop\SNMP"}
2020-06-10 13:06:22,651 pysmi: failing on error Unknown parent symbol: mib_2 at MIB HOST-RESOURCES-MIB from FileReader{"C:\Users\Fusse\Desktop\SNMP"}
2020-06-10 13:06:22,651 pysmi: no HOST-RESOURCES-MIB found everywhere
2020-06-10 13:06:22,651 pysmi: MIBs analyzed 0, MIBs failed 1
2020-06-10 13:06:22,651 pysmi: MIBs parsed 0, MIBs failed 1
2020-06-10 13:06:22,651 pysmi: MIBs built 0, MIBs failed 1
2020-06-10 13:06:22,652 pysmi: MIBs available for borrowing 0, MIBs failed 1
2020-06-10 13:06:22,652 pysmi: MIBs built 0, MIBs failed 1
2020-06-10 13:06:22,652 pysmi: failing with problem MIBs HOST-RESOURCES-MIB

MIB文件的开头如下所示：

HOST-RESOURCES-MIB DEFINITIONS ::= BEGIN

IMPORTS
    DisplayString             FROM RFC1213-MIB
    TimeTicks, 
    OBJECT-TYPE,
    Counter, Gauge            FROM RFC1155-SMI;

host     OBJECT IDENTIFIER ::= { mib-2 25 }


hrSystem        OBJECT IDENTIFIER ::= { host 1 }
hrStorage       OBJECT IDENTIFIER ::= { host 2 }
hrDevice        OBJECT IDENTIFIER ::= { host 3 }
hrSWRun         OBJECT IDENTIFIER ::= { host 4 }
hrSWRunPerf     OBJECT IDENTIFIER ::= { host 5 }
hrSWInstalled   OBJECT IDENTIFIER ::= { host 6 }

似乎主机对象标识符是问题所在，但我找不到解决方案

是否存在允许pysnmp读取主机标识符的解决方法

Answer 1

1）待安装的模块

pip install pysnmp
pip install snmpclitools
pip install pyasn1
pip install pyasn1-modules
pip install pysmi
pip install pysnmpcrypto

2）编译mib：

rom pysmi.reader import FileReader
from pysmi.searcher import PyFileSearcher, PyPackageSearcher, StubSearcher
from pysmi.writer import PyFileWriter
from pysmi.parser import SmiStarParser
from pysmi.codegen import PySnmpCodeGen
from pysmi.compiler import MibCompiler

inputMibs = ['IF-MIB', 'IP-MIB']
srcDirectories = ['/usr/share/snmp/mibs']
dstDirectory = '.pysnmp-mibs'

# Initialize compiler infrastructure

mibCompiler = MibCompiler(SmiStarParser(),
                          PySnmpCodeGen(),
                          PyFileWriter(dstDirectory))

# search for source MIBs here
mibCompiler.addSources(*[FileReader(x) for x in srcDirectories])

# check compiled MIBs in our own productions
mibCompiler.addSearchers(PyFileSearcher(dstDirectory))
# ...and at default PySNMP MIBs packages
mibCompiler.addSearchers(*[PyPackageSearcher(x) for x in PySnmpCodeGen.defaultMibPackages])

# never recompile MIBs with MACROs
mibCompiler.addSearchers(StubSearcher(*PySnmpCodeGen.baseMibs))

# run [possibly recursive] MIB compilation
results = mibCompiler.compile(*inputMibs)  #, rebuild=True, genTexts=True)

print('Results: %s' % ', '.join(['%s:%s' % (x, results[x]) for x in results]))

3）检查文件mymib.my是否存在：

Python37\Lib\site-packages\pysnmp\smi\mibs\mymib.py