/usr/lib/python3/dist-packages/pysnmp/proto/rfc1902.py is in python3-pysnmp4 4.2.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | from pyasn1.type import univ, tag, constraint, namedtype, namedval
from pysnmp.proto import rfc1155, error
class Integer(univ.Integer):
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
-2147483648, 2147483647
)
class Integer32(univ.Integer):
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
-2147483648, 2147483647
)
class OctetString(univ.OctetString):
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueSizeConstraint(
0, 65535
)
# rfc1902 uses a notion of "fixed length string" what might mean
# having zero-range size constraint applied. The following is
# supposed to be used for setting and querying this property.
fixedLength = None
def setFixedLength(self, value):
self.fixedLength = value
return self
def isFixedLength(self):
return self.fixedLength is not None
def getFixedLength(self):
return self.fixedLength
class IpAddress(univ.OctetString):
tagSet = univ.OctetString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x00)
)
subtypeSpec = univ.OctetString.subtypeSpec+constraint.ValueSizeConstraint(
4, 4
)
fixedLength = 4
def prettyIn(self, value):
if isinstance(value, str) and len(value) != 4:
try:
value = [ int(x) for x in value.split('.') ]
except:
raise error.ProtocolError('Bad IP address syntax %s' % value)
value = univ.OctetString.prettyIn(self, value)
if len(value) != 4:
raise error.ProtocolError('Bad IP address syntax')
return value
def prettyOut(self, value):
if value:
return '.'.join(
[ '%d' % x for x in self.__class__(value).asNumbers() ]
)
else:
return ''
class Counter32(univ.Integer):
tagSet = univ.Integer.tagSet.tagImplicitly(
tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x01)
)
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
0, 4294967295
)
class Gauge32(univ.Integer):
tagSet = univ.Integer.tagSet.tagImplicitly(
tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x02)
)
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
0, 4294967295
)
class Unsigned32(univ.Integer):
tagSet = univ.Integer.tagSet.tagImplicitly(
tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x02)
)
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
0, 4294967295
)
class TimeTicks(univ.Integer):
tagSet = univ.Integer.tagSet.tagImplicitly(
tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x03)
)
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
0, 4294967295
)
class Opaque(univ.OctetString):
tagSet = univ.OctetString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x04)
)
class Counter64(univ.Integer):
tagSet = univ.Integer.tagSet.tagImplicitly(
tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x06)
)
subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
0, 18446744073709551615
)
class Bits(univ.OctetString):
namedValues = namedval.NamedValues()
def __init__(self, value=None, tagSet=None, subtypeSpec=None,
namedValues=None):
if namedValues is None:
self.__namedValues = self.namedValues
else:
self.__namedValues = namedValues
univ.OctetString.__init__(
self, value, tagSet, subtypeSpec
)
def prettyIn(self, bits):
if not isinstance(bits, (tuple, list)):
return univ.OctetString.prettyIn(self, bits) # raw bitstring
octets = []
for bit in bits: # tuple of named bits
v = self.__namedValues.getValue(bit)
if v is None:
raise error.ProtocolError(
'Unknown named bit %s' % bit
)
d, m = divmod(v, 8)
if d >= len(octets):
octets.extend([0] * (d - len(octets) + 1))
octets[d] = octets[d] | 0x01 << (7-m)
return univ.OctetString.prettyIn(self, octets)
def prettyOut(self, value):
names = []
ints = self.__class__(value).asNumbers()
i = 0
while i < len(ints):
v = ints[i]
j = 7
while j >= 0:
if v & (0x01<<j):
name = self.__namedValues.getName(i*8+7-j)
if name is None:
raise error.ProtocolError(
'Unknown named value %s' % v
)
names.append(name)
j = j - 1
i = i + 1
return ', '.join([ str(x) for x in names ])
def clone(self, value=None, tagSet=None, subtypeSpec=None,
namedValues=None):
if value is None and tagSet is None and subtypeSpec is None \
and namedValues is None:
return self
if value is None:
value = self._value
if tagSet is None:
tagSet = self._tagSet
if subtypeSpec is None:
subtypeSpec = self._subtypeSpec
if namedValues is None:
namedValues = self.__namedValues
return self.__class__(value, tagSet, subtypeSpec, namedValues)
def subtype(self, value=None, implicitTag=None, explicitTag=None,
subtypeSpec=None, namedValues=None):
if value is None:
value = self._value
if implicitTag is not None:
tagSet = self._tagSet.tagImplicitly(implicitTag)
elif explicitTag is not None:
tagSet = self._tagSet.tagExplicitly(explicitTag)
else:
tagSet = self._tagSet
if subtypeSpec is None:
subtypeSpec = self._subtypeSpec
else:
subtypeSpec = subtypeSpec + self._subtypeSpec
if namedValues is None:
namedValues = self.__namedValues
else:
namedValues = namedValues + self.__namedValues
return self.__class__(value, tagSet, subtypeSpec, namedValues)
class ObjectName(univ.ObjectIdentifier): pass
class SimpleSyntax(rfc1155.TypeCoercionHackMixIn, univ.Choice):
componentType = namedtype.NamedTypes(
namedtype.NamedType('integer-value', Integer()),
namedtype.NamedType('string-value', OctetString()),
namedtype.NamedType('objectID-value', univ.ObjectIdentifier())
)
class ApplicationSyntax(rfc1155.TypeCoercionHackMixIn, univ.Choice):
componentType = namedtype.NamedTypes(
namedtype.NamedType('ipAddress-value', IpAddress()),
namedtype.NamedType('counter-value', Counter32()),
namedtype.NamedType('timeticks-value', TimeTicks()),
namedtype.NamedType('arbitrary-value', Opaque()),
namedtype.NamedType('big-counter-value', Counter64()),
# This conflicts with Counter32
# namedtype.NamedType('unsigned-integer-value', Unsigned32()),
namedtype.NamedType('gauge32-value', Gauge32())
) # BITS misplaced?
class ObjectSyntax(univ.Choice):
componentType = namedtype.NamedTypes(
namedtype.NamedType('simple', SimpleSyntax()),
namedtype.NamedType('application-wide', ApplicationSyntax())
)
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