use strict;
use Net::DNS::Nameserver;
+use Net::DNS::Resolver;
use Data::Dump qw/dump/;
+use CouchDB;
+
+use server;
+our $debug = server::debug;
+
+my $res = Net::DNS::Resolver->new(
+# nameserver => [ '10.60.0.1' ],
+ recurse => 1,
+ debug => $debug,
+);
+
+our $ptr_cache;
+sub name_ip {
+ my ( $name, $ip ) = @_;
+ $ptr_cache->{ join('.', reverse split(/\./, $ip)) } = $name;
+ return $ip;
+}
sub reply_handler {
my ($qname, $qclass, $qtype, $peerhost,$query,$conn) = @_;
my ($rcode, @ans, @auth, @add);
- print "Received query from $peerhost to ". $conn->{"sockhost"}. "\n";
- $query->print;
+ server->refresh;
+ $debug = server::debug;
+
+ CouchDB::audit( 'request', {
+ qname => $qname,
+ qclass => $qclass,
+ qtype => $qtype,
+ peerhost => $peerhost,
+ sockhost => $conn->{"sockhost"}
+ });
+
+ $query->print if $debug;
+
+ my $local = $1 if $qname =~ m{^(.+)\.\Q$server::domain_name\E$};
+ $local = $qname if $qname !~ m{\.};
+
+ my $ttl = 3600;
-
- if ($qtype eq "A" && $qname eq "foo.example.com" ) {
- my ($ttl, $rdata) = (3600, "10.1.2.3");
- push @ans, Net::DNS::RR->new("$qname $ttl $qclass $qtype $rdata");
+ my $audit = { source => 'unknown' };
+
+ if ( $local ) {
+ warn "local[$local] $qname $qtype";
$rcode = "NOERROR";
- }elsif( $qname eq "foo.example.com" ) {
+ my $rdata;
+ if ( $qtype eq "A" && $local eq "server" ) {
+ $rdata = name_ip( $local, $server::ip );
+ $audit->{source} = 'local';
+ } else {
+ $rcode = "NXDOMAIN";
+ }
+
+ push @ans, Net::DNS::RR->new("$qname $ttl $qclass $qtype $rdata") if $ttl;
+
+ } elsif ( $qtype eq 'PTR' && $qname =~ m{^([0-9\.]*)\.in-addr\.arpa$} ) {
+ if ( my $rdata = $ptr_cache->{$1} ) {
+ $rdata .= '.' . $server::domain_name;
+ push @ans, Net::DNS::RR->new("$qname $ttl $qclass $qtype $rdata");
+ $audit->{source} = 'PTR';
+ } else {
+warn "## ",dump( $ptr_cache );
+ $rcode = "NXDOMAIN";
+ }
+ } elsif ( my $packet = $res->query( $qname, $qtype ) ) {
+
+ $audit->{source} = 'upstream';
+ $packet->print;
+ push @ans, $_ foreach $packet->answer;
$rcode = "NOERROR";
- }else{
- $rcode = "NXDOMAIN";
+ } else {
+ # not found
+ $rcode = "NXDOMAIN";
}
+ warn "rcode: $rcode ",dump( @ans );
+
+ $audit->{rcode} = $rcode;
+ $audit->{ans} = [ map {
+ my $data;
+ foreach my $n ( keys %$_ ) {
+ $data->{$n} = $_->{$n};
+ }
+ $data;
+ } @ans ];
+
+ CouchDB::audit( 'response', $audit );
+
# mark the answer as authoritive (by setting the 'aa' flag
return ($rcode, \@ans, \@auth, \@add, { aa => 1 });
}
my $ns = Net::DNS::Nameserver->new(
LocalPort => 53,
ReplyHandler => \&reply_handler,
- Verbose => 1,
+ Verbose => $debug,
) || die "couldn't create nameserver object\n";
- warn dump( $ns );
+ CouchDB::audit('start', { port => 53, domain_name => $server::domain_name });
+ warn "DNS $server::domain_name";
$ns->main_loop;
}
-1;
+1;