1#
2# SNMPv2c message syntax
3#
4# ASN.1 source from:
5# http://www.ietf.org/rfc/rfc1902.txt
6#
7from pyasn1.type import univ, namedtype, namedval, tag, constraint
8
9class Integer(univ.Integer):
10    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
11        -2147483648, 2147483647
12        )
13
14class Integer32(univ.Integer):
15    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
16        -2147483648, 2147483647
17        )
18
19class OctetString(univ.OctetString):
20    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueSizeConstraint(
21        0, 65535
22        )
23
24class IpAddress(univ.OctetString):
25    tagSet = univ.OctetString.tagSet.tagImplicitly(
26        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x00)
27        )
28    subtypeSpec = univ.OctetString.subtypeSpec+constraint.ValueSizeConstraint(
29        4, 4
30        )
31
32class Counter32(univ.Integer):
33    tagSet = univ.Integer.tagSet.tagImplicitly(
34        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x01)
35        )
36    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
37        0, 4294967295
38        )
39
40class Gauge32(univ.Integer):
41    tagSet = univ.Integer.tagSet.tagImplicitly(
42        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x02)
43        )
44    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
45        0, 4294967295
46        )
47
48class Unsigned32(univ.Integer):
49    tagSet = univ.Integer.tagSet.tagImplicitly(
50        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x02)
51        )
52    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
53        0, 4294967295
54        )
55
56class TimeTicks(univ.Integer):
57    tagSet = univ.Integer.tagSet.tagImplicitly(
58        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x03)
59        )
60    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
61        0, 4294967295
62        )
63
64class Opaque(univ.OctetString):
65    tagSet = univ.OctetString.tagSet.tagImplicitly(
66        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x04)
67        )
68
69class Counter64(univ.Integer):
70    tagSet = univ.Integer.tagSet.tagImplicitly(
71        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0x06)
72        )
73    subtypeSpec = univ.Integer.subtypeSpec+constraint.ValueRangeConstraint(
74        0, 18446744073709551615
75        )
76
77class Bits(univ.OctetString): pass
78
79class ObjectName(univ.ObjectIdentifier): pass
80
81class SimpleSyntax(univ.Choice):
82    componentType = namedtype.NamedTypes(
83        namedtype.NamedType('integer-value', Integer()),
84        namedtype.NamedType('string-value', OctetString()),
85        namedtype.NamedType('objectID-value', univ.ObjectIdentifier())
86        )
87
88class ApplicationSyntax(univ.Choice):
89    componentType = namedtype.NamedTypes(
90        namedtype.NamedType('ipAddress-value', IpAddress()),
91        namedtype.NamedType('counter-value', Counter32()),
92        namedtype.NamedType('timeticks-value', TimeTicks()),
93        namedtype.NamedType('arbitrary-value', Opaque()),
94        namedtype.NamedType('big-counter-value', Counter64()),
95# This conflicts with Counter32
96#        namedtype.NamedType('unsigned-integer-value', Unsigned32()),
97        namedtype.NamedType('gauge32-value', Gauge32())
98        ) # BITS misplaced?
99
100class ObjectSyntax(univ.Choice):
101    componentType = namedtype.NamedTypes(
102        namedtype.NamedType('simple', SimpleSyntax()),
103        namedtype.NamedType('application-wide', ApplicationSyntax())
104        )
105
106