SNMP Variable classes

The ancestor of all SNMP variable classes is an abstract class called SnmpVar. This class contains abstract methods for printing, ASN encoding, ASN decoding, etc.

The SnmpVar class has five direct sub-classes. They are:

SnmpInt

This class is used to represent SNMP Integer syntax variables.

SnmpNull

This class is used to represent SNMP Null variables.

SnmpOID

The SNMP Object Identifier variable class. In addition to the usual SNMP variable class methods, this class has special constructors and methods to help interface to the MIB related classes described below.

SnmpString

Used for SNMP Octet Strings.
The following two classes are subclasses of SnmpString:

SnmpOpaque

Used for SNMP Opaque variable types.

SnmpIpAddress

Used for SNMP IpAddress variable types.

SnmpUnsignedInt

This class is not used directly but is a super-class of some of the SNMP application variable types. SnmpUnsignedInt has the following sub-classes.

SnmpCounter

For SNMP Counter variable types.

SnmpGauge

For SNMP Gauge variable types.

SnmpTimeticks

For SNMP Timeticks variable types.

A variable binding is a combination of an object identifier and an SNMP variable that's commonly used in SNMP manager - agent interactions. The SnmpVarBind class is used for variables and methods needed for variable bindings. ASNTypes contains some utility functions and constants, needed in encoding and decoding SNMP variables. It is not needed for developers of applications.