315 lines
8.6 KiB
Plaintext
315 lines
8.6 KiB
Plaintext
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## ########################################################################
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##
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## Config for generating modules for use in the embedded perl environmentg
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##
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## Copyright Tripleplay Services Limited 2005
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## All rights reserved.
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##
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## Use is subject to license terms specified in the COPYING file
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## distributed with the Net-SNMP package.
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##
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## ########################################################################
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##
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## Gotchas.
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## Any $ signs in the output will be snaffled and disappear. For this reason
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## lines that need to output perl variables use a printf line instead
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##
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## Comments that are for the use of documenting this config file
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## need to be double hashes
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##
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## Operation
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## 1. Creates a file called output.tmp which contains the main data structures
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## and a call to the agent startup function.
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## 2. Creates a file called skel.tmp with skeleton accessor functions.
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## This should be copied to functions.pl and edited to actually
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## do the work required for each leaf.
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## 3. Creates an output file with the OID name. This contains the bolierplate
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## and the data structures
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## This is the file to reference in the snmpd.conf file
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##
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## The user must fill in the functions.pl code as requried. This file is then
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## included at run time at the top of the generated perl code
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## (do 'functions.pl)
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##
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## The generated file needs the NetSNMP::agent::Support.pm module in the
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## system. This module contains the run-time support for the agent.
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##
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## The oidtable is a hash of hashes with the top level key an OID
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## There are two types of entry
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## 1. Scalars have the full OID plus the .0 index string
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## 2. Columnar data has the index fields set to 0. The NetSNMP::agent::Support
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## code will use zeros to locate the table specific handlers.
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##
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## #########################################################################
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## #########################################################################
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## Define the 'macros' used later in this config file
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## #########################################################################
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@define EMIT_INDEX_VARS@
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##
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## Calculate the number of index identifiers and then
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## for each identifier work out the offset in the oid
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##
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@eval $numindex=0@
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@eval $idxoffset = $c.oidlength@
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# The values of the oid elements for the indexes
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@foreach $i index@
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## my $$idx_$i = getOidElement($$idx, $idxoffset);
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@printf " my %sidx_$vars{'i'} = getOidElement(%soid, $vars{'idxoffset'});\n",$,$@
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@eval $idxoffset = $idxoffset + 1@
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@end@
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@enddefine@
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@define EMIT_GETARGS@
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##
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## Output the code the get the args for a function
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##
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# The OID is passed as a NetSNMP::OID object
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@printf " my (%soid) = shift;\n",$@
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@enddefine@
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@define EMIT_LOAD_DATA@
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##
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## Emit the code to load a data table
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##
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# Load the $t table data
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load_$t();
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@enddefine@
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@define EMIT_INDEX_INFO@
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##
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## Emit a list of indexes for a table as perl comments
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## To be used when generating the comment fields for a handler
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##
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# In Table: $t
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@foreach $i index@
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# Index: $i
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@end@
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@enddefine@
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@define EMIT_INDEX_WALKER@
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##
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## Output a skeleton index walker and index checker
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## for the table if it has not been done already
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##
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@if $needwalker@
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## Output skeleton index validator for table
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# -------------------------------------------------------
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# Index validation for table $t
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# Checks the supplied OID is in range
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# Returns 1 if it is and 0 if out of range
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@calldefine EMIT_INDEX_INFO@
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# -------------------------------------------------------
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sub check_$t {
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@calldefine EMIT_GETARGS@
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@calldefine EMIT_INDEX_VARS@
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@calldefine EMIT_LOAD_DATA@
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# Check the index is in range and valid
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return 1;
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}
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# -------------------------------------------------------
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# Index walker for table $t
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# Given an OID for a table, returns the next OID in range,
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# or if no more OIDs it returns 0.
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@calldefine EMIT_INDEX_INFO@
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# -------------------------------------------------------
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sub next_$t {
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@calldefine EMIT_GETARGS@
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@calldefine EMIT_INDEX_VARS@
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@calldefine EMIT_LOAD_DATA@
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# Return the next OID if there is one
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# or return 0 if no more OIDs in this table
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return 0;
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}
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@eval $needwalker = 0@ ## Dont need this again for the current table
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@end@
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@enddefine@
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@define EMIT_TABLE_LOAD@
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# -------------------------------------------------------
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# Loader for table $t
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# Edit this function to load the data needed for $t
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# This function gets called for every request to columnar
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# data in the $t table
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# -------------------------------------------------------
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sub load_$t {
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}
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@enddefine@
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@eval $date=scalar localtime; @
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## Open the output file and emit the perl startup bolierplate
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@open output.tmp@
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#!/usr/bin/perl -w
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#
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#
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# WARNING: DO NOT EDIT THIS FILE BY HAND.
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#
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# This file has been generated by mib2c using the mib2c.perl.conf file
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# This is intended to be used by the net-snmp agent with embedded perl
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# support. See perldoc NetSNMP::agent
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#
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# Created on $date
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#
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# To load this into a running agent with embedded perl support turned
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# on, simply put the following line (without the leading # mark) your
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# snmpd.conf file:
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#
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@printf "# perl do 'path/to/agent_%s.pl'\n",$oid@
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#
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# You will need a copy of NetSNMP installed. This has been developed using
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# NetSNMP version 5.2.2
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#
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##use strict;
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use NetSNMP::agent::Support;
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use NetSNMP::ASN (':all');
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# Include the functions to handle the nodes
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do 'functions.pl';
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## Create the skeleton file ready for the skeleton handlers later on
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@push@
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@open skel.tmp@
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# Skeleton accessor functions.
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# DO NOT EDIT
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# This file will be overwritten next time mib2c is run.
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# Copy this file to functions.pl and then edit it.
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@close skel.tmp@
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@pop@
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## Generate the hash of hashes with the oids and handlers for the tables
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# Hash for all OIDs
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@printf "my %soidtable={\n", $@
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# Table objects
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@foreach $t table@
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@print Processing table $t@
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@push@
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@append skel.tmp@
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## Output skeleton loader for this table
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@calldefine EMIT_TABLE_LOAD@
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@close skel.tmp@
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@pop@
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##
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@eval $needwalker = 1@ ## Need the walker and checker once this table
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@foreach $c nonindex@
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@if $c.accessible @
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##
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## Generate the entry for the hash table
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## We first calculate the number of index items for this table
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@eval $numindex = 0@
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@eval $idxelem = ""@
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@foreach $i index@
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@perleval $vars{'idxelem'} .= '.0'; 0; @
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@eval $numindex = $numindex+1@
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@end@
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"$c.objectID$idxelem"=>{func=>\&get_$c,type=>$c.type, check=>\&check_$t, nextoid=>\&next_$t, istable=>'1', next=>"", numindex=>$numindex},
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## Output skeleton handlers for this column object
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@push@
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@append skel.tmp@
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@calldefine EMIT_INDEX_WALKER@
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# -------------------------------------------------------
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# Handler for columnar object '$c'
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# OID: $c.objectID
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# Syntax: $c.type
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# From: $c.module
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@calldefine EMIT_INDEX_INFO@
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# -------------------------------------------------------
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sub get_$c {
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@calldefine EMIT_GETARGS@
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@calldefine EMIT_INDEX_VARS@
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@calldefine EMIT_LOAD_DATA@
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# Code here to read the required variable from the loaded table
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# using whatever indexing you need.
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# The index has already been checked and found to be valid
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## Add further types as required.
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@if $c.type eq "ASN_INTEGER"@
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return 32;
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@end@
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@if $c.type eq "ASN_OCTET_STR"@
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return "STR";
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@end@
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@if $c.type eq "ASN_COUNTER64"@
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return 64;
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@end@
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}
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@close skel.tmp@
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@pop@
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@end@
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@end@
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@end@
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@print Processing scalars@
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## output the hash with the OIDs and handlers
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## Scalars have a single index element
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# Scalars
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@foreach $s scalar@
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@if $s.accessible@
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'$s.objectID.0'=>{func=>\&get_$s,type=>$s.type,next=>"", numindex=>1},
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@end@
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@end@
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##End of the OID hash
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};
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## Emit code to register the top level oid with the agent
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## The $oid variable comes from mib2c as the last non option arg
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# Register the top oid with the agent
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@printf "registerAgent(%sagent, '$oid', %soidtable);",$,$@
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## Output skeleton handlers for the scalars
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@push@
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@append skel.tmp@
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@foreach $s scalar@
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@if $s.accessible@
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# -------------------------------------------------------
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# Handler for scalar object $s
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# OID: $s.objectID
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# Syntax: $s.type
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# From: $s.module
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# -------------------------------------------------------
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sub get_$s {
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# Add code here to read the value required and return it
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## Add further types as required.
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@if $s.type eq "ASN_INTEGER"@
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return 32;
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@end@
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@if $s.type eq "ASN_OCTET_STR"@
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return "STR";
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@end@
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@if $s.type eq "ASN_COUNTER64"@
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return 64;
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@end@
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}
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@end@
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@end@
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@close skel.tmp@
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@pop@
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@close output.tmp@
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##
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## Now create the code file from the outputfile
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##
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@startperl@
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my $oidname = $vars{'oid'};
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my $out = "agent_" . $oidname .".pl";
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system("cat output.tmp > $out");
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@endperl@
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@print Output code generated.@
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