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diff --git a/lib/probes/FPing.pm b/lib/probes/FPing.pm
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+package probes::FPing;
+
+=head1 NAME
+
+probes::FPing - FPing Probe for SmokePing
+
+=head1 SYNOPSIS
+
+ *** Probes ***
+ + FPing
+ binary = /usr/sepp/bin/fping
+ packetsize = 1024
+
+=head1 DESCRIPTION
+
+Integrates FPing as a probe into smokeping. The variable B<binary> must
+point to your copy of the FPing program. If it is not installed on
+your system yet, you can get it from http://www.fping.com/.
+
+The (optional) packetsize option lets you configure the packetsize for the pings sent.
+The FPing manpage has the following to say on this topic:
+
+Number of bytes of ping data to send.  The minimum size (normally 12) allows
+room for the data that fping needs to do its work (sequence number,
+timestamp).  The reported received data size includes the IP header
+(normally 20 bytes) and ICMP header (8 bytes), so the minimum total size is
+40 bytes.  Default is 56, as in ping. Maximum is the theoretical maximum IP
+datagram size (64K), though most systems limit this to a smaller,
+system-dependent number.
+
+=head1 AUTHOR
+
+Tobias Oetiker <tobi@oetiker.ch>
+
+=cut
+
+use strict;
+use base qw(probes::base);
+use IPC::Open3;
+use Symbol;
+use Carp;
+
+sub new($$$)
+{
+    my $proto = shift;
+    my $class = ref($proto) || $proto;
+    my $self = $class->SUPER::new(@_);
+
+    # no need for this if we run as a cgi
+    unless ( $ENV{SERVER_SOFTWARE} ) {
+        croak "ERROR: FPing packetsize must be between 12 and 64000"
+           if $self->{properties}{packetsize} and 
+              ( $self->{properties}{packetsize} < 12 or $self->{properties}{packetsize} > 64000 ); 
+
+        croak "ERROR: FPing 'binary' not defined in FPing probe definition"
+            unless defined $self->{properties}{binary};
+
+        croak "ERROR: FPing 'binary' does not point to an executable"
+            unless -f $self->{properties}{binary} and -x $self->{properties}{binary};
+    
+        my $return = `$self->{properties}{binary} -C 1 localhost 2>&1`;
+        croak "ERROR: FPing must be installed setuid root or it will not work\n" 
+            if $return =~ m/only.+root/;
+
+        if ($return =~ m/bytes, ([0-9.]+)\sms\s+.*\n.*\n.*:\s+([0-9.]+)/ and $1 > 0){
+            $self->{pingfactor} = 1000 * $2/$1;
+            print "### fping seems to report in ", $1/$2, " milliseconds\n";
+        } else {
+            $self->{pingfactor} = 1000; # Gives us a good-guess default
+            print "### assuming you are using an fping copy reporting in milliseconds\n";
+        }
+    };
+
+    return $self;
+}
+
+sub ProbeDesc($){
+    my $self = shift;
+    my $bytes = $self->{properties}{packetsize} || 56;
+    return "ICMP Echo Pings ($bytes Bytes)";
+}
+
+sub ping ($){
+    my $self = shift;
+    # do NOT call superclass ... the ping method MUST be overwriten
+    my %upd;
+    my $inh = gensym;
+    my $outh = gensym;
+    my $errh = gensym;
+    # pinging nothing is pointless
+    return unless @{$self->addresses};
+    my @bytes = () ;
+    push @bytes, "-b$self->{properties}{packetsize}" if $self->{properties}{packetsize};
+    my @cmd = (
+                    $self->{properties}{binary}, @bytes,
+                    '-C', $self->pings, '-q','-B1','-i10','-r1',
+                    @{$self->addresses});
+    $self->do_debug("Executing @cmd");
+    my $pid = open3($inh,$outh,$errh, @cmd);
+    $self->{rtts}={};
+    while (<$errh>){
+        chomp;
+        next unless /^\S+\s+:\s+[\d\.]/; #filter out error messages from fping
+        my @times = split /\s+/;
+        my $ip = shift @times;
+        next unless ':' eq shift @times; #drop the colon
+
+        @times = map {sprintf "%.10e", $_ / $self->{pingfactor}} sort {$a <=> $b} grep /^\d/, @times;
+        map { $self->{rtts}{$_} = [@times] } @{$self->{addrlookup}{$ip}} ;
+    }
+    waitpid $pid,0;
+    close $inh;
+    close $outh;
+    close $errh;
+}
+
+1;