// convertClass converts the encoding of values in SNMP response from
// "custom" class to the corresponding "universal" class, thus enabling
// use of the asn1 parser from the encoding/asn1 package.
func convertClass(v *asn1.RawValue) {
if v.Class != 1 {
// Not a custom type.
return
}
switch v.Tag {
case 0, 4:
// IpAddress ::= [APPLICATION 0] IMPLICIT OCTET STRING (SIZE (4))
// Opaque ::= [APPLICATION 4] IMPLICIT OCTET STRING
v.FullBytes[0] = 0x04
v.Class = 0
v.Tag = 4
case 1, 2, 3, 6:
// Counter32 ::= [APPLICATION 1] IMPLICIT INTEGER (0..4294967295)
// Unsigned32 ::= [APPLICATION 2] IMPLICIT INTEGER (0..4294967295)
// TimeTicks ::= [APPLICATION 3] IMPLICIT INTEGER (0..4294967295)
// Counter64 ::= [APPLICATION 6] IMPLICIT INTEGER (0..18446744073709551615)
v.FullBytes[0] = 0x02
v.Class = 0
v.Tag = 2
}
}
