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101 lines
4.1 KiB
Python
101 lines
4.1 KiB
Python
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#
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# SNMPv2c PDU syntax
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#
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# ASN.1 source from:
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# http://www.ietf.org/rfc/rfc1905.txt
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#
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from pyasn1.type import univ, namedtype, namedval, tag, constraint
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from pyasn1_modules import rfc1902
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max_bindings = rfc1902.Integer(2147483647)
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class _BindValue(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('value', rfc1902.ObjectSyntax()),
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namedtype.NamedType('unSpecified', univ.Null()),
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namedtype.NamedType('noSuchObject', univ.Null().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
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namedtype.NamedType('noSuchInstance', univ.Null().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
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namedtype.NamedType('endOfMibView', univ.Null().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
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)
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class VarBind(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('name', rfc1902.ObjectName()),
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namedtype.NamedType('', _BindValue())
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)
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class VarBindList(univ.SequenceOf):
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componentType = VarBind()
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subtypeSpec = univ.SequenceOf.subtypeSpec + constraint.ValueSizeConstraint(
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0, max_bindings
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)
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class PDU(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('request-id', rfc1902.Integer32()),
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namedtype.NamedType('error-status', univ.Integer(namedValues=namedval.NamedValues(('noError', 0), ('tooBig', 1), ('noSuchName', 2), ('badValue', 3), ('readOnly', 4), ('genErr', 5), ('noAccess', 6), ('wrongType', 7), ('wrongLength', 8), ('wrongEncoding', 9), ('wrongValue', 10), ('noCreation', 11), ('inconsistentValue', 12), ('resourceUnavailable', 13), ('commitFailed', 14), ('undoFailed', 15), ('authorizationError', 16), ('notWritable', 17), ('inconsistentName', 18)))),
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namedtype.NamedType('error-index', univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(0, max_bindings))),
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namedtype.NamedType('variable-bindings', VarBindList())
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)
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class BulkPDU(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('request-id', rfc1902.Integer32()),
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namedtype.NamedType('non-repeaters', univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(0, max_bindings))),
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namedtype.NamedType('max-repetitions', univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(0, max_bindings))),
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namedtype.NamedType('variable-bindings', VarBindList())
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)
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class GetRequestPDU(PDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)
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)
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class GetNextRequestPDU(PDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)
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)
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class ResponsePDU(PDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 2)
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)
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class SetRequestPDU(PDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3)
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)
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class GetBulkRequestPDU(BulkPDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 5)
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)
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class InformRequestPDU(PDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 6)
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)
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class SNMPv2TrapPDU(PDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 7)
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)
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class ReportPDU(PDU):
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tagSet = PDU.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 8)
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)
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class PDUs(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('get-request', GetRequestPDU()),
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namedtype.NamedType('get-next-request', GetNextRequestPDU()),
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namedtype.NamedType('get-bulk-request', GetBulkRequestPDU()),
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namedtype.NamedType('response', ResponsePDU()),
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namedtype.NamedType('set-request', SetRequestPDU()),
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namedtype.NamedType('inform-request', InformRequestPDU()),
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namedtype.NamedType('snmpV2-trap', SNMPv2TrapPDU()),
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namedtype.NamedType('report', ReportPDU())
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)
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