snmpit_apc.pm 4.89 KB
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#!/usr/bin/perl -w
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#
# EMULAB-COPYRIGHT
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# Copyright (c) 2000-2003, 2006 University of Utah and the Flux Group.
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# All rights reserved.
#

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#
# snmpit module for APC MasterSwitch power controllers
#
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# supports new(ip), power(on|off|cyc[le],port), status
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#

package snmpit_apc;

$| = 1; # Turn off line buffering on output

use SNMP;
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use strict;

sub new($$;$) {

    # The next two lines are some voodoo taken from perltoot(1)
    my $proto = shift;
    my $class = ref($proto) || $proto;

    my $devicename = shift;
    my $debug = shift;

    if (!defined($debug)) {
	$debug = 0;
    }

    if ($debug) {
	print "snmpit_apm module initializing... debug level $debug\n";
    }
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    $SNMP::debugging = ($debug - 5) if $debug > 5;
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    my $mibpath = "/usr/local/share/snmp/mibs";
    &SNMP::addMibDirs($mibpath);
    &SNMP::addMibFiles("$mibpath/RFC1155-SMI.txt",
	"$mibpath/PowerNet-MIB.txt");

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    $SNMP::save_descriptions = 1; # must be set prior to mib initialization
    SNMP::initMib();              # parses default list of Mib modules
    $SNMP::use_enums = 1;         #use enum values instead of only ints
    print "Opening SNMP session to $devicename..." if $debug;
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    my $sess =new SNMP::Session(DestHost => $devicename, Community => 'private', Version => '1');
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    if (!defined($sess)) {
	warn("ERROR: Unable to connect to $devicename via SNMP\n");
	return undef;
    }

    my $self = {};

    $self->{SESS} = $sess;
    $self->{DEBUG} = $debug;
    $self->{DEVICENAME} = $devicename;

    bless($self,$class);
    return $self;
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}

sub power {
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    my $self = shift;
    my $op = shift;
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    my @ports = @_;

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    my $CtlOID = ".1.3.6.1.4.1.318.1.1.4.4.2.1.3";
    if    ($op eq "on")  { $op = "outletOn";    }
    elsif ($op eq "off") { $op = "outletOff";   }
    elsif ($op =~ /cyc/) { $op = "outletReboot";}
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    my $errors = 0;

    foreach my $port (@ports) {
	print STDERR "**** Controlling port $port\n" if ($self->{DEBUG} > 1);
	if ($self->UpdateField($CtlOID,$port,$op)) {
	    print STDERR "Outlet #$port control failed.\n";
	    $errors++;
	}
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    }
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    return $errors;
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}

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sub status {
    my $self = shift;
    my $statusp = shift;
    my %status;

    my $StatOID = ".1.3.6.1.4.1.318.1.1.4.2.2";
    my $Status = 0;

    $Status = $self->{SESS}->get([[$StatOID,0]]);
    if (!defined $Status) {
	print STDERR $self->{DEVICENAME}, ": no answer from device\n";
	return 1;
    }
    print("Status is '$Status'\n") if $self->{DEBUG};

    if ($statusp) {
	my @stats = split '\s+', $Status;
	my $o = 1;
	foreach my $ostat (@stats) {
	    my $outlet = "outlet$o";
	    $status{$outlet} = $ostat;
	    $o++;
	}
	%$statusp = %status;
    }
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    #
    # We can retrieve the total amperage in use (in tenths of amps) 
    # on an APC by retrieving the rPDULoadStatusLoad.  There are 
    # entries for each of the phases of power that the device supports,
    # and for each of the banks of power it provides.
    #
    # We could add either the phases or the banks, but since the phases
    # come first, we use them.  We grab the number of phases supported,
    # then use that as a limit on how many status load values we retrieve.
    #
    # The OID to retrieve the phases is:  ".1.3.6.1.4.1.318.1.1.12.2.1.2";
    # the load status table OID is:  ".1.3.6.1.4.1.318.1.1.12.2.3.1.1.2".
    #
    my $phases;

    $phases = $self->{SESS}->get([["rPDULoadDevNumPhases",0]]);
    if (!$phases) {
	# not all models support this MIB
	print STDERR "Query phase: No answer from device\n" if $self->{DEBUG};
	return 0;
    }

    print "Okay.\nPhase report was '$phases'\n" if $self->{DEBUG};
    my ($varname, $index, $power, $val, $done);
    my $oid = ["rPDULoadStatusLoad",1];

    $self->{SESS}->get($oid);
    while ($$oid[0] =~ /rPDULoad/) {
        ($varname, $index, $val) = @{$oid};
        if ($varname eq "rPDULoadStatusLoad") {
            if ($index <= $phases) {
    		print "Raw current value $val\n" if $self->{DEBUG};
                $status{current} += $val;
            }
        }
        $self->{SESS}->getnext($oid);
    }

    print "Total raw current is $status{current}\n" if $self->{DEBUG};
    $status{current} /= 10;

    if ($statusp) {
       %$statusp = %status;
    }

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    return 0;
}

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sub UpdateField {
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    my ($self,$OID,$port,$val) = @_;

    print "sess=$self->{SESS} $OID $port $val\n" if $self->{DEBUG} > 1;

    my $Status = 0;
    my $retval;

    print "Checking port $port of $self->{DEVICENAME} for $val..." if $self->{DEBUG};
    $Status = $self->{SESS}->get([[$OID,$port]]);
    if (!defined $Status) {
	print STDERR "Port $port, change to $val: No answer from device\n";
	return 1;
    } else {
	print "Okay.\nPort $port was $Status\n" if $self->{DEBUG};
	if ($Status ne $val) {
	    print "Setting $port to $val..." if $self->{DEBUG};
	    $retval = $self->{SESS}->set([[$OID,$port,$val,"INTEGER"]]);
	    print "Set returned '$retval'" if $self->{DEBUG};
	    if ($retval) { return 0; } else { return 1; }
	}
	return 0;
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    }
}

# End with true
1;