#!/usr/bin/perl -Tw
#
# LMS version 1.4.0rc4 Evalla
#
#  (C) 2001-2004 LMS Developers
#
#  Please, see the doc/AUTHORS for more information about authors!
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License Version 2 as
#  published by the Free Software Foundation.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
#  USA.
#
#  $Id: lms-fping,v 1.4.2.1 2004/09/18 19:14:46 alec Exp $

use strict;
use DBI;
use Config::IniFiles;
use Getopt::Long;
use vars qw($configfile $quiet $help $version);

$ENV{'PATH'}='/sbin:/usr/sbin:/usr/local/sbin:/bin:/usr/bin:/usr/local/bin';

my $_version = '1.4.0rc4 Evalla';

my %options = (
	"--config-file|C=s"	=>	\$configfile,
	"--quiet|q"		=>	\$quiet,
	"--help|h"		=>	\$help,
	"--version|v"		=>	\$version
);

Getopt::Long::config("no_ignore_case");
GetOptions(%options);

my @adresyip;

sub u32todotquad($)
{
	my $p = shift @_;
	return sprintf "%d.%d.%d.%d", ($p>>24)&0xff,($p>>16)&0xff, ($p>>8)&0xff,$p&0xff;
}

sub dotquad2u32($)
{
	my $dq = shift||'0.0.0.0';
	my @dq = split('\.',$dq,4);
	return ((($dq[0] << 8) + $dq[1] << 8) + $dq[2] << 8) + $dq[3];
}

sub mask2prefix($)
{
        my $mask = shift @_;
        my @tmp = split('\.',$mask,4);
        my $q = sprintf("%b%b%b%b",$tmp[0],$tmp[1],$tmp[2],$tmp[3]);
        $q =~ s/0*$//;
        if ($q =~ /0/) {
                print " You idiot. error in mask\n";
        }
        my $len = length($q) ;
        return $len;
}

if($help)
{
	print STDERR <<EOF;
lms-fping, version $_version
(C) 2001-2004 LMS Developers

-C, --config-file=/etc/lms/lms.ini	alternate config file (default: /etc/lms/lms.ini);
-h, --help			print this help and exit;
-v, --version			print version info and exit;
-q, --quiet			suppress any output, except errors;

EOF
	exit 0;
}

if($version)
{
	print STDERR <<EOF;
lms-fping, version $_version
(C) 2001-2004 LMS Developers

EOF
	exit 0;
}

if(!$configfile)
{
	$configfile = "/etc/lms/lms.ini";
}

if(!$quiet)
{
	print STDOUT "lms-fping, version $_version\n";
	print STDOUT "(C) 2001-2004 LMS Developers\n";
	print STDOUT "Using file $configfile as config.\n";
}

if(! -r $configfile)
{
	print STDERR "Fatal error: Unable to read configuration file $configfile, exiting.\n";
	exit 1;
}

my $ini = new Config::IniFiles -file => $configfile;
print @Config::IniFiles::errors;

my $networks_list = $ini->val('fping','networks') || '';
my $fping = $ini->val('fping','fping_binary') || '/usr/sbin/fping';
my $tmpfile = $ini->val('fping','temp_file') || '/tmp/fping_hosts';

my $dbtype = $ini->val('database', 'type') || 'mysql';
my $dbhost = $ini->val('database', 'host') || 'localhost';
my $dbuser = $ini->val('database', 'user') || 'root';
my $dbpasswd = $ini->val('database', 'password') || '';
my $dbname = $ini->val('database', 'database') || 'lms';

my $dbase;
my $utsfmt;

if($dbtype eq "mysql")
{
	$dbase = DBI->connect("DBI:mysql:database=$dbname;host=$dbhost","$dbuser","$dbpasswd", { RaiseError => 1 });
	$utsfmt = "UNIX_TIMESTAMP()";
}
elsif($dbtype eq "postgres")
{
	$dbase = DBI->connect("DBI:Pg:dbname=$dbname;host=$dbhost","$dbuser","$dbpasswd", { RaiseError => 1 });
	$utsfmt = "EXTRACT(EPOCH FROM CURRENT_TIMESTAMP(0))";
}
elsif($dbtype eq "sqlite")
{
	$dbase = DBI->connect("DBI:SQLite:dbname=$dbname;host=$dbhost","$dbuser","$dbpasswd", { RaiseError => 1 });
	$utsfmt = "strftime('%s','now')";
	$dbase->func('inet_ntoa',1,'u32todotquad','create_function');
	$dbase->func('inet_aton',1,'dotquad2u32','create_function');	

}
else
{
	print STDERR "Fatal error: unsupported database type: $dbtype, exiting.\n";
	exit 1;
}

if(!$networks_list)
{
	my $dbq = $dbase->prepare("SELECT name FROM networks");
	$dbq->execute();
	while (my $row = $dbq->fetchrow_hashref()) {
		$networks_list = "$networks_list $row->{'name'}";
	}
}

my @networks = split ' ', $networks_list;

# create temporary file with list of hosts

foreach my $network (@networks)
{
	my $dbq = $dbase->prepare("SELECT name, INET_NTOA(address) AS address, mask FROM networks WHERE UPPER(name) = UPPER('$network')");
	$dbq->execute();
	
	if(my $row = $dbq->fetchrow_hashref())
	{
    		my $netsize = 2**(32 - mask2prefix($row->{'mask'}));

		my $ndbq = $dbase->prepare("SELECT INET_NTOA(ipaddr) AS ipaddr FROM nodes WHERE ipaddr>INET_ATON('$row->{'address'}') AND ipaddr<INET_ATON('$row->{'address'}')+$netsize");
		$ndbq->execute();
		
		while(my $nodrow = $ndbq->fetchrow_hashref())
		{
			push(@adresyip, "$nodrow->{'ipaddr'}");
		}
	}
}

my @lines;
foreach my $adres (@adresyip) {
	system "/usr/sbin/arping -i eth1 $adres -c1 -q -d";
	if ( "$?" == "0" ) { 
		push(@lines, "$adres");
	}

}


foreach my $line (@lines)
{
	$line =~ s/^\s+//;
	$line =~ s/\s+$//;
	my $idbq = $dbase->prepare("UPDATE nodes SET lastonline=$utsfmt WHERE ipaddr=INET_ATON('$line')");
	$idbq->execute();
	if(!$quiet)
	{
		print "$line\n";
	}
}

$dbase->disconnect();
system("rm $tmpfile");