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|
package HaCi::SnmpUtils;
use warnings;
use strict;
use Net::SNMP qw(:snmp);
use HaCi::Log qw/warnl debug/;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(
getSNMPSession getSNMPTree getSNMPValue
);
our $conf; *conf = \$HaCi::Conf::conf;
sub getSNMPSession {
my $host = shift;
my $comm = shift;
my $opts = shift || {};
my $port = $opts->{port} || 161;
my $nBlocking = $opts->{nBlocking} || 1;
my $version = $opts->{version} || 'snmpv2';
my $timeout = $opts->{timeout} || 10;
$version = 'snmpv' . $version unless $version =~ /^snmpv/;
my ($session, $error) = Net::SNMP->session(
-hostname => $host,
-port => $port,
-community => $comm,
-version => $version,
-nonblocking => $nBlocking,
-timeout => $timeout
);
if (!defined($session)) {
&warnl("Cannot initiate Session for " . $host . ": $error! Abort...", 1);
return undef;
}
return $session;
}
sub getSNMPTree {
my $session = shift;
my $oid = shift;
my $results = {};
my $result = undef;
my $version = $session->version;
if ($version == 0) {
$result = $session->get_next_request(
-callback => [\&snmpCB, $results, $oid],
-delay => 0,
-varbindlist => [$oid]
);
}
elsif ($version == 1 || $version == 3) {
$result = $session->get_bulk_request(
-callback => [\&snmpCB, $results, $oid],
-maxrepetitions => 10,
-delay => 0,
-varbindlist => [$oid]
);
}
else {
&warnl("Bad SNMP Version '$version'!", 1);
return undef;
}
if (!defined($result)) {
&warnl("Cannot retrieve any Results for System: " . $session->hostname . ": " . $session->error, 1);
return undef;
}
snmp_dispatcher();
return $results;
}
sub snmpCB {
my ($session, $results, $query) = @_;
my $version = $session->version;
if (!defined($session->var_bind_list)) {
&warnl("SNMP-Error: " . $session->error, 1);
} else {
my $next = undef;
foreach my $oid (oid_lex_sort(keys(%{$session->var_bind_list}))) {
if (!oid_base_match($query, $oid)) {
$next = undef;
last;
}
$next = $oid;
my $value = $session->var_bind_list->{$oid};
$results->{$oid} = $value;
}
if (defined($next)) {
my $result = undef;
if ($version == 0) {
$result = $session->get_next_request(
-callback => [\&snmpCB, $results, $query],
-delay => 0,
-varbindlist => [$next]
);
}
elsif ($version == 1 || $version == 3) {
$result = $session->get_bulk_request(
-callback => [\&snmpCB, $results, $query],
-maxrepetitions => 10,
-delay => 0,
-varbindlist => [$next]
);
} else {
&warnl("Bad SNMP Version '$version'!", 1);
}
if (!defined($result)) {
&warnl("SNMP-Errro: " . $session->error, 1);
}
}
}
}
sub getSNMPValue {
my $session = shift;
my $snmpOID = shift;
my $result = $session->get_request(
-varbindlist => [$snmpOID]
);
if (!defined($result)) {
&warnl("SNMP-Error: " . $session->error, 1) unless $session->error =~ /noSuchName/;
return undef;
}
return (ref $result eq 'HASH') ? $result->{$snmpOID} : undef;
}
1;
|
