SNMP Subagent Programmer's Guide

Programming Tutorials
SNMP Subagent Programmer’s Guide—119728 2-7
Hello World Program
Include Statements
The include statement at the beginning of the MIB definition identifies a header file that
the MIB compiler, GDMOC, needs to resolve data types. The header file, named
typessmi, contains definitions of all the standard SNMP data types.
Note that this MIB also contains an IMPORT statement defining standard data types for
objects in the MIB. Although GDMOC ignores this statement, obtaining instead the
information it needs on types from typessmi, some managers need type definitions such
as these before a MIB can be compiled on the manager station. Refer to “Installing the
MIB,” later in this subsection, for more information on MIB definition changes for
manager stations.
helloFreqChange TRAP-TYPE
ENTERPRISE hello
VARIABLES { helloPrintFreq }
DESCRIPTION
"A helloFreqChange trap signifies that the
sending hello world entity has had its
'helloPrintFreq' variable modified."
::= 0
END
EXTEND OBJECT-TYPE helloOutputText
WITH C_VARIABLE helloText
IN C
EXTEND OBJECT-TYPE helloPrintFreq
WITH C_VARIABLE helloPrintFreq
IN C
EXTEND OBJECT-TYPE helloPrintCnt
WITH C_VARIABLE helloPrintCnt
IN C
Example 2-1. Hello World MIB Definition (page 2 of 2)