1 files changed, 147 insertions, 0 deletions
diff --git a/lib/probes/DNS.pm b/lib/probes/DNS.pm
new file mode 100644
index 0000000..877ca97
--- /dev/null
+++ b/lib/probes/DNS.pm
@@ -0,0 +1,147 @@
+package probes::DNS;
+
+=head1 NAME
+
+probes::DNS - Name Service Probe for SmokePing
+
+=head1 SYNOPSIS
+
+ *** Probes ***
+ + DNS
+ binary = /usr/bin/dig
+
+ *** Targets *** 
+ probe = DNS
+ forks = 10
+
+ + First
+ menu = First
+ title = First Target
+ # .... 
+
+ ++ PROBE_CONF
+ lookup=www.mozilla.org
+
+=head1 DESCRIPTION
+
+Integrates dig as a probe into smokeping. The variable B<binary> must
+point to your copy of the dig program. If it is not installed on
+your system yet, you should install bind-utils >= 9.0.0.
+
+The Probe asks the given host n-times for it's name. Where n is
+the amount specified in the config File.
+
+Supported probe-specific variables:
+
+=over
+
+=item binary
+
+The location of your dig binary.
+
+=item forks
+
+The number of concurrent processes to be run. See probes::basefork(3pm)
+for details.
+
+=back
+
+Supported target-level probe variables:
+
+=over
+
+=item lookup
+
+Name of the host to look up in the dns.
+
+=back
+
+
+=head1 AUTHOR
+
+Igor Petrovski E<lt>pigor@myrealbox.comE<gt>,
+Carl Elkins E<lt>carl@celkins.org.ukE<gt>,
+Andre Stolze E<lt>stolze@uni-muenster.deE<gt>,
+Niko Tyni E<lt>ntyni@iki.fiE<gt>,
+Chris Poetzel<lt>cpoetzel@anl.gov<gt>
+
+
+=cut
+
+use strict;
+use base qw(probes::basefork);
+use IPC::Open3;
+use Symbol;
+use Carp;
+
+my $dig_re=qr/query time:\s+([0-9.]+)\smsec.*/i;
+
+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: DNS 'binary' not defined in FPing probe definition"
+            unless defined $self->{properties}{binary};
+
+        croak "ERROR: DNS 'binary' does not point to an executable"
+            unless -f $self->{properties}{binary} and -x $self->{properties}{binary};
+        my $call = "$self->{properties}{binary} localhost";
+        my $return = `$call 2>&1`;
+        if ($return =~ m/$dig_re/s){
+            $self->{pingfactor} = 1000;
+            print "### parsing dig output...OK\n";
+        } else {
+            croak "ERROR: output of '$call' does not match $dig_re\n";
+        }
+    };
+
+    return $self;
+}
+
+sub ProbeDesc($){
+    my $self = shift;
+    return "DNS requests";
+}
+
+sub pingone ($){
+    my $self = shift;
+    my $target = shift;
+
+    my $inh = gensym;
+    my $outh = gensym;
+    my $errh = gensym;
+
+    my $host = $target->{addr};
+    my $lookuphost = $target->{vars}{lookup};
+    $lookuphost = $target->{addr} unless defined $lookuphost;
+
+    #my $host = $target->{addr};
+    my $query = "$self->{properties}{binary} \@$host $lookuphost";
+    my @times;
+
+    $self->do_debug("query=$query\n");
+    for (my $run = 0; $run < $self->pings($target); $run++) {
+	my $pid = open3($inh,$outh,$errh, $query);
+	while (<$outh>) {
+	    if (/$dig_re/i) {
+		push @times, $1;
+		last;
+	    }
+	}
+	waitpid $pid,0;
+	close $errh;
+	close $inh;
+	close $outh;
+    }
+    @times = map {sprintf "%.10e", $_ / $self->{pingfactor}} sort {$a <=> $b} grep {$_ ne "-"} @times;
+
+#    $self->do_debug("time=@times\n");
+    return @times;
+}
+
+1;