eSNMP API Routines

*_get Routine

*_get Routine

The *_get routine is a method routine for the specified MIB item, which is typically a MIB group (for example, system in MIB II) or a table entry (for example, ifEntry in MIB II).

Format

int mib-group_get ( METHOD *method ) ;

Arguments

method

A pointer to a METHOD structure that contains the following fields:

Field Name

Description

 

 

action

One of ESNMP_ACT_GET, ESNMP_ACT_

 

GETNEXT, or ESNMP_ACT_GETBULK.

serial_num

An integer number that is unique to this SNMP

 

request. Each method routine called while

 

servicing a single SNMP request receives the

 

same value of serial_num. New SNMP requests

 

are indicated by a new value of serial_num.

repeat_cnt

Used for GetBulk only. This value indicates

 

the current iteration number of a repeating

 

VARBIND. This number increments from 1 to

 

max_repetitions and is 0 (zero) for nonrepeating

 

VARBIND structures.

max_repetitions

The maximum number of repetitions to

 

perform. Used for GetBulk only. This will be 0

 

(zero) for nonrepeating VARBIND structures.

 

You can optimize subsequent processing by

 

knowing the maximum number repeat calls will

 

be made.

varbind

A pointer to the VARBIND structure for

 

which you must fill in the OID and data

 

fields. Upon entry of the method routine,

 

the method->varbind->name field is the OID

 

that was requested.

 

Upon exit of the method routine, the

 

method->varbindfield contains the requested

 

data, and the method->varbind->name field is

 

updated to reflect the actual instance OID for

 

the returned VARBIND structure.

 

The support routines (o_integer, o_string,

 

o_oid, and o_octet) are generally used

 

to load data. The libsnmp instance2oid

 

routine is used to update the OID in the

 

method->varbind->name field.

5–20eSNMP API Routines

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Compaq AAR04BCTE manual ESNMP API Routines Get Routine, Method

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