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#
# This file is part of pyasn1-modules software.
#
# Copyright (c) 2005-2020, Ilya Etingof <etingof@gmail.com>
# License: https://www.pysnmp.com/pyasn1/license.html
#
# SNMPv2c PDU syntax
#
# ASN.1 source from:
# http://www.ietf.org/rfc/rfc1905.txt
#
from pyasn1.type import constraint, namedtype, namedval, tag, univ
from pyasn1_modules import rfc1902
max_bindings = rfc1902.Integer(2147483647)
class _BindValue(univ.Choice):
componentType = namedtype.NamedTypes(
namedtype.NamedType("value", rfc1902.ObjectSyntax()),
namedtype.NamedType("unSpecified", univ.Null()),
namedtype.NamedType(
"noSuchObject",
univ.Null().subtype(
implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0)
),
),
namedtype.NamedType(
"noSuchInstance",
univ.Null().subtype(
implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)
),
),
namedtype.NamedType(
"endOfMibView",
univ.Null().subtype(
implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)
),
),
)
class VarBind(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType("name", rfc1902.ObjectName()),
namedtype.NamedType("", _BindValue()),
)
class VarBindList(univ.SequenceOf):
componentType = VarBind()
sizeSpec = univ.SequenceOf.sizeSpec + constraint.ValueSizeConstraint(
0, max_bindings
)
class PDU(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType("request-id", rfc1902.Integer32()),
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),
)
),
),
namedtype.NamedType(
"error-index",
univ.Integer().subtype(
subtypeSpec=constraint.ValueRangeConstraint(0, max_bindings)
),
),
namedtype.NamedType("variable-bindings", VarBindList()),
)
class BulkPDU(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType("request-id", rfc1902.Integer32()),
namedtype.NamedType(
"non-repeaters",
univ.Integer().subtype(
subtypeSpec=constraint.ValueRangeConstraint(0, max_bindings)
),
),
namedtype.NamedType(
"max-repetitions",
univ.Integer().subtype(
subtypeSpec=constraint.ValueRangeConstraint(0, max_bindings)
),
),
namedtype.NamedType("variable-bindings", VarBindList()),
)
class GetRequestPDU(PDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)
)
class GetNextRequestPDU(PDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)
)
class ResponsePDU(PDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 2)
)
class SetRequestPDU(PDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3)
)
class GetBulkRequestPDU(BulkPDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 5)
)
class InformRequestPDU(PDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 6)
)
class SNMPv2TrapPDU(PDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 7)
)
class ReportPDU(PDU):
tagSet = PDU.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 8)
)
class PDUs(univ.Choice):
componentType = namedtype.NamedTypes(
namedtype.NamedType("get-request", GetRequestPDU()),
namedtype.NamedType("get-next-request", GetNextRequestPDU()),
namedtype.NamedType("get-bulk-request", GetBulkRequestPDU()),
namedtype.NamedType("response", ResponsePDU()),
namedtype.NamedType("set-request", SetRequestPDU()),
namedtype.NamedType("inform-request", InformRequestPDU()),
namedtype.NamedType("snmpV2-trap", SNMPv2TrapPDU()),
namedtype.NamedType("report", ReportPDU()),
)
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