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#!/usr/bin/perl -wT
# -----------------------------------------------------------------------------
# File Name: check_ircd.pl
#
# Author: Richard Mayhew - South Africa
#
# Date: 1999/09/20
#
#
# Description: This script will check to see if an IRCD is running
# about how many users it has
#
# Email: netsaint@splash.co.za
#
# -----------------------------------------------------------------------------
# Copyright 1999 (c) Richard Mayhew
#
# Credits go to Ethan Galstad for coding Nagios
#
# If any changes are made to this script, please mail me a copy of the
# changes :)
#
# Some code taken from Charlie Cook (check_disk.pl)
#
# License GPL
#
# -----------------------------------------------------------------------------
# Date Author Reason
# ---- ------ ------
#
# 1999/09/20 RM Creation
#
# 1999/09/20 TP Changed script to use strict, more secure by
# specifying $ENV variables. The bind command is
# still insecure through. Did most of my work
# with perl -wT and 'use strict'
#
# test using check_ircd.pl (irc-2.mit.edu|irc.erols.com|irc.core.com)
# 2002/05/02 SG Fixed for Embedded Perl
#
# ----------------------------------------------------------------[ Require ]--
require 5.004;
# -------------------------------------------------------------------[ Uses ]--
use Socket;
use strict;
use Getopt::Long;
use vars qw($opt_V $opt_h $opt_t $opt_p $opt_H $opt_w $opt_c $verbose);
use vars qw($PROGNAME);
use lib utils.pm;
use utils qw($TIMEOUT %ERRORS &print_revision &support &usage);
# ----------------------------------------------------[ Function Prototypes ]--
sub print_help ();
sub print_usage ();
sub connection ($$$$);
sub bindRemote ($$);
# -------------------------------------------------------------[ Enviroment ]--
$ENV{PATH} = "";
$ENV{ENV} = "";
$ENV{BASH_ENV} = "";
# -----------------------------------------------------------------[ Global ]--
$PROGNAME = "check_ircd";
my $NICK="ircd$$";
my $USER_INFO="monitor localhost localhost : ";
# -------------------------------------------------------------[ connection ]--
sub connection ($$$$)
{
my ($in_remotehost,$in_users,$in_warn,$in_crit) = @_;
my $state;
my $answer;
print "connection(debug): users = $in_users\n" if $verbose;
$in_users =~ s/\ //g;
if ($in_users >= 0) {
if ($in_users > $in_crit) {
$state = "CRITICAL";
$answer = "Critical Number Of Clients Connected : $in_users (Limit = $in_crit)\n";
} elsif ($in_users > $in_warn) {
$state = "WARNING";
$answer = "Warning Number Of Clients Connected : $in_users (Limit = $in_warn)\n";
} else {
$state = "OK";
$answer = "IRCD ok - Current Local Users: $in_users\n";
}
} else {
$state = "UNKNOWN";
$answer = "Server $in_remotehost has less than 0 users! Something is Really WRONG!\n";
}
print ClientSocket "quit\n";
print $answer;
exit $ERRORS{$state};
}
# ------------------------------------------------------------[ print_usage ]--
sub print_usage () {
print "Usage: $PROGNAME -H <host> [-w <warn>] [-c <crit>] [-p <port>]\n";
}
# -------------------------------------------------------------[ print_help ]--
sub print_help ()
{
print_revision($PROGNAME,'@NP_VERSION@');
print "Copyright (c) 2000 Richard Mayhew/Karl DeBisschop
Perl Check IRCD plugin for Nagios
";
print_usage();
print "
-H, --hostname=HOST
Name or IP address of host to check
-w, --warning=INTEGER
Number of connected users which generates a warning state (Default: 50)
-c, --critical=INTEGER
Number of connected users which generates a critical state (Default: 100)
-p, --port=INTEGER
Port that the ircd daemon is running on <host> (Default: 6667)
-v, --verbose
Print extra debugging information
";
}
# -------------------------------------------------------------[ bindRemote ]--
sub bindRemote ($$)
{
my ($in_remotehost, $in_remoteport) = @_;
my $proto = getprotobyname('tcp');
my $sockaddr;
my $that;
my ($name, $aliases,$type,$len,$thataddr) = gethostbyname($in_remotehost);
if (!socket(ClientSocket,AF_INET, SOCK_STREAM, $proto)) {
print "IRCD UNKNOWN: Could not start socket ($!)\n";
exit $ERRORS{"UNKNOWN"};
}
$sockaddr = 'S n a4 x8';
$that = pack($sockaddr, AF_INET, $in_remoteport, $thataddr);
if (!connect(ClientSocket, $that)) {
print "IRCD UNKNOWN: Could not connect socket ($!)\n";
exit $ERRORS{"UNKNOWN"};
}
select(ClientSocket); $| = 1; select(STDOUT);
return \*ClientSocket;
}
# ===================================================================[ MAIN ]==
MAIN:
{
my $hostname;
Getopt::Long::Configure('bundling');
GetOptions
("V" => \$opt_V, "version" => \$opt_V,
"h" => \$opt_h, "help" => \$opt_h,
"v" => \$verbose,"verbose" => \$verbose,
"t=i" => \$opt_t, "timeout=i" => \$opt_t,
"w=i" => \$opt_w, "warning=i" => \$opt_w,
"c=i" => \$opt_c, "critical=i" => \$opt_c,
"p=i" => \$opt_p, "port=i" => \$opt_p,
"H=s" => \$opt_H, "hostname=s" => \$opt_H);
if ($opt_V) {
print_revision($PROGNAME,'@NP_VERSION@');
exit $ERRORS{'OK'};
}
if ($opt_h) {print_help(); exit $ERRORS{'OK'};}
($opt_H) || ($opt_H = shift @ARGV) || usage("Host name/address not specified\n");
my $remotehost = $1 if ($opt_H =~ /([-.A-Za-z0-9]+)/);
($remotehost) || usage("Invalid host: $opt_H\n");
($opt_w) || ($opt_w = shift @ARGV) || ($opt_w = 50);
my $warn = $1 if ($opt_w =~ /^([0-9]+)$/);
($warn) || usage("Invalid warning threshold: $opt_w\n");
($opt_c) || ($opt_c = shift @ARGV) || ($opt_c = 100);
my $crit = $1 if ($opt_c =~ /^([0-9]+)$/);
($crit) || usage("Invalid critical threshold: $opt_c\n");
($opt_p) || ($opt_p = shift @ARGV) || ($opt_p = 6667);
my $remoteport = $1 if ($opt_p =~ /^([0-9]+)$/);
($remoteport) || usage("Invalid port: $opt_p\n");
if ($opt_t && $opt_t =~ /^([0-9]+)$/) { $TIMEOUT = $1; }
# Just in case of problems, let's not hang Nagios
$SIG{'ALRM'} = sub {
print "Somthing is Taking a Long Time, Increase Your TIMEOUT (Currently Set At $TIMEOUT Seconds)\n";
exit $ERRORS{"UNKNOWN"};
};
alarm($TIMEOUT);
my ($name, $alias, $proto) = getprotobyname('tcp');
print "MAIN(debug): binding to remote host: $remotehost -> $remoteport\n" if $verbose;
my $ClientSocket = &bindRemote($remotehost,$remoteport);
print ClientSocket "NICK $NICK\nUSER $USER_INFO\n";
while (<ClientSocket>) {
print "MAIN(debug): default var = $_\n" if $verbose;
# DALnet,LagNet,UnderNet etc. Require this!
# Replies with a PONG when presented with a PING query.
# If a server doesn't require it, it will be ignored.
if (m/^PING (.*)/) {print ClientSocket "PONG $1\n";}
alarm(0);
# Look for pattern in IRCD Output to gather Client Connections total.
connection($remotehost,$1,$warn,$crit) if (m/:I have\s+(\d+)/);
}
print "IRCD UNKNOWN: Unknown error - maybe could not authenticate\n";
exit $ERRORS{"UNKNOWN"};
}
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