epixoip

#!/usr/bin/perl
# Tue Apr  3 16:42:08 PDT 2007 by epixoip <epixoip@hush.com>
# synping - a tcp syn ping utility

use Net::Ping;
use Time::HiRes;
use Getopt::Std;

my %options = ();
getopts("c:i:t:T",\%options);
our $host = $ARGV[0];
our $port = $ARGV[1];
our $seq = 0;

&usage unless defined($port);

sub usage {
        print "SYN Ping Utility - by epixoip <epixoip\@hush.com>\n";
        print "Usage:\t$0 [-citT] <host> <port>\n";
        print "\t-c\tStop after \$foo iterations\n";
        print "\t-i\tWait \$foo seconds between iterations\n";
        print "\t-t\tSet TTL to \$foo\n";
        print "\t-T\tTimestamp output\n\n";
        exit(1);
}

$p = Net::Ping->new("syn", $options{t});
$p->hires();
$p->{port_num} = $port;
while (1) {
        $p->ping($host);
        if (($hostn,$rtt,$ip) = $p->ack) {
                print "[", localtime(time), "] " if defined($options{T});
                printf("ack from $host ($ip) port=$port seq=$seq time=%.2f ms\n", $rtt * 1000);
        } else {
                my $reason = $p->nack($host);
                print "[", localtime(time), "] " if defined($options{T});
                print "seq $seq: no reply from $host: $reason\n";
        }
        if (defined($options{c})) {
                if ($seq == $options{c} - 1) {
                        exit(0);
                }
        }
        $seq++;
        if (defined($options{i})) {
                sleep($options{i});
        } else {
                sleep(1);
        }
}