Re: [pysnmp-users] ObjectIdentity.resolveWithMib() fails to resolve instance indices with InetAddre
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Re: [pysnmp-users] ObjectIdentity.resolveWithMib() fails to resolve instance indices with InetAddressIPv4 type
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From: <et...@gm...> - 2017-09-29 23:24:49
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Hi Kim,
Can you check out pysnmp master branch at GitHub please? There have been relevant changes lately.
Let me know if it helps or not.
Thanks!
> On 29 Sep 2017, at 03:06, Eugene Kim <eug...@nt...> wrote:
>
> Greetings,
>
> While walking TCP-MIB::tcpConnectionTable, I noticed that their table
> indices were left unresolved after calling resolveWithMib(); turning MIB
> instrumentation debugging on revealed that the size constraint checks
> were applied to the textual IP address value, and not to the raw
> (4-byte) value. The problem does not occur for non-IP-address table
> indices, such as ifIndex.
>
> To reproduce:
>
> from pysnmp.smi.rfc1902 import ObjectIdentity
> from pysnmp.smi.builder import MibBuilder
> from pysnmp.smi.compiler import addMibCompiler
> from pysnmp.smi.view import MibViewController
> from pysnmp.debug import Debug, setLogger
>
> builder = MibBuilder()
> addMibCompiler(builder)
> builder.loadModules('IF-MIB')
> builder.loadModules('TCP-MIB')
> view = MibViewController(builder)
>
> def doit(*poargs):
> print(ObjectIdentity(*poargs).resolveWithMib(view).getMibSymbol())
>
> setLogger(Debug('all'))
> doit('.1.3.6.1.2.1.2.2.1.1.1')
> doit('.1.3.6.1.2.1.6.19.1.7.1.9.49.48.46.48.46.48.46.49.49.22.1.14.49.57.50.46.49.54.57.46.50.48.46.49.53.52.2629')
>
>
> Returns:
>
> 2017-09-28 18:03:13,481 pysnmp: running pysnmp version 4.3.9
> 2017-09-28 18:03:13,481 pysnmp: debug category 'all' enabled
> 2017-09-28 18:03:13,482 pysnmp: resolving .1.3.6.1.2.1.2.2.1.2.1 as
> OID or label
> 2017-09-28 18:03:13,482 pysnmp: indexMib: re-indexing MIB view
> 2017-09-28 18:03:13,486 pysnmp: getNodeNameByOid: resolved
> :1.3.6.1.2.1.2.2.1.2.1 -> ('iso', 'org', 'dod', 'internet', 'mgmt',
> 'mib-2', 'interfaces', 'ifTable', 'ifEntry', 'ifDescr').1
> 2017-09-28 18:03:13,486 pysnmp: resolved ('.1.3.6.1.2.1.2.2.1.2.1',)
> into prefix ObjectName('1.3.6.1.2.1.2.2.1.2') and suffix ObjectName('1')
> 2017-09-28 18:03:13,486 pysnmp: getNodeNameByOid: resolved
> :1.3.6.1.2.1.2.2.1.2 -> ('iso', 'org', 'dod', 'internet', 'mgmt',
> 'mib-2', 'interfaces', 'ifTable', 'ifEntry', 'ifDescr').()
> 2017-09-28 18:03:13,486 pysnmp: resolved prefix
> ObjectName('1.3.6.1.2.1.2.2.1.2') into MIB node MibTableColumn((1,
> 3, 6, 1, 2, 1, 2, 2, 1, 2),
> DisplayString(subtypeSpec=ConstraintsIntersection(ValueSizeConstraint(0,
> 65535), ValueSizeConstraint(0, 255), ValueSizeConstraint(0, 255))))
> 2017-09-28 18:03:13,486 pysnmp: getNodeNameByOid: resolved :(1, 3,
> 6, 1, 2, 1, 2, 2, 1) -> ('iso', 'org', 'dod', 'internet', 'mgmt',
> 'mib-2', 'interfaces', 'ifTable', 'ifEntry').()
> 2017-09-28 18:03:13,487 pysnmp: resolved indices are
> (InterfaceIndex(1),)
> ('IF-MIB', 'ifDescr', (InterfaceIndex(1),))
> 2017-09-28 18:03:13,487 pysnmp: resolving
> .1.3.6.1.2.1.6.19.1.7.1.9.49.48.46.48.46.48.46.49.49.22.1.14.49.57.50.46.49.54.57.46.50.48.46.49.53.52.2629
> as OID or label
> 2017-09-28 18:03:13,490 pysnmp: getNodeNameByOid: resolved
> :1.3.6.1.2.1.6.19.1.7.1.9.49.48.46.48.46.48.46.49.49.22.1.14.49.57.50.46.49.54.57.46.50.48.46.49.53.52.2629
> -> ('iso', 'org', 'dod', 'internet', 'mgmt', 'mib-2', 'tcp',
> 'tcpConnectionTable', 'tcpConnectionEntry',
> 'tcpConnectionState').1.9.49.48.46.48.46.48.46.49.49.22.1.14.49.57.50.46.49.54.57.46.50.48.46.49.53.52.2629
> 2017-09-28 18:03:13,490 pysnmp: resolved
> ('.1.3.6.1.2.1.6.19.1.7.1.9.49.48.46.48.46.48.46.49.49.22.1.14.49.57.50.46.49.54.57.46.50.48.46.49.53.52.2629',)
> into prefix ObjectName('1.3.6.1.2.1.6.19.1.7') and suffix
> ObjectName('1.9.49.48.46.48.46.48.46.49.49.22.1.14.49.57.50.46.49.54.57.46.50.48.46.49.53.52.2629')
> 2017-09-28 18:03:13,490 pysnmp: getNodeNameByOid: resolved
> :1.3.6.1.2.1.6.19.1.7 -> ('iso', 'org', 'dod', 'internet', 'mgmt',
> 'mib-2', 'tcp', 'tcpConnectionTable', 'tcpConnectionEntry',
> 'tcpConnectionState').()
> 2017-09-28 18:03:13,490 pysnmp: resolved prefix
> ObjectName('1.3.6.1.2.1.6.19.1.7') into MIB node MibTableColumn((1,
> 3, 6, 1, 2, 1, 6, 19, 1, 7),
> Integer32(subtypeSpec=ConstraintsIntersection(ValueRangeConstraint(-2147483648,
> 2147483647), ConstraintsUnion(SingleValueConstraint(1, 2, 3, 4, 5,
> 6, 7, 8, 9, 10, 11, 12))), NamedValues((('synReceived', 4),
> ('established', 5), ('finWait2', 7), ('timeWait', 11), ('finWait1',
> 6), ('lastAck', 9), ('closeWait', 8), ('deleteTCB', 12), ('closed',
> 1), ('closing', 10), ('listen', 2), ('synSent', 3)))))
> 2017-09-28 18:03:13,490 pysnmp: getNodeNameByOid: resolved :(1, 3,
> 6, 1, 2, 1, 6, 19, 1) -> ('iso', 'org', 'dod', 'internet', 'mgmt',
> 'mib-2', 'tcp', 'tcpConnectionTable', 'tcpConnectionEntry').()
> 2017-09-28 18:03:13,491 pysnmp: error resolving table indices at
> MibTableRow, (9, 49, 48, 46, 48, 46, 48, 46, 49, 49, 22, 1, 14, 49,
> 57, 50, 46, 49, 54, 57, 46, 50, 48, 46, 49, 53, 52, 2629):
> ConstraintsIntersection(ValueSizeConstraint(0, 65535),
> ValueSizeConstraint(4, 4)) failed at:
> ValueConstraintError("ValueSizeConstraint(4, 4) failed at:
> ValueConstraintError('10.0.0.11',)",) at InetAddressIPv4
> 2017-09-28 18:03:13,491 pysnmp: resolved indices are ((9, 49, 48,
> 46, 48, 46, 48, 46, 49, 49, 22, 1, 14, 49, 57, 50, 46, 49, 54, 57,
> 46, 50, 48, 46, 49, 53, 52, 2629),)
> ('TCP-MIB', 'tcpConnectionState', ((9, 49, 48, 46, 48, 46, 48, 46,
> 49, 49, 22, 1, 14, 49, 57, 50, 46, 49, 54, 57, 46, 50, 48, 46, 49,
> 53, 52, 2629),))
>
>
> Note how IF-MIB::ifDescr's instance index was resolved correctly to
> (InterfaceIndex(1),), while TCP-MIB::tcpConnectionState's instance index
> was left unresolved as ((9, 49, 48, 46, ...),).
>
> How can I fix or work around this issue?
>
> Cheers,
> Eugene
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