6 |
use Net::DNS::Nameserver; |
use Net::DNS::Nameserver; |
7 |
use Net::DNS::Resolver; |
use Net::DNS::Resolver; |
8 |
use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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use CouchDB; |
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|
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use server; |
use server; |
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our $debug = server::debug; |
our $debug = server::debug; |
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debug => $debug, |
debug => $debug, |
18 |
); |
); |
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|
20 |
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our $ptr_cache; |
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sub name_ip { |
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my ( $name, $ip ) = @_; |
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$ptr_cache->{ join('.', reverse split(/\./, $ip)) } = $name; |
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return $ip; |
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} |
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|
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sub reply_handler { |
sub reply_handler { |
28 |
my ($qname, $qclass, $qtype, $peerhost,$query,$conn) = @_; |
my ($qname, $qclass, $qtype, $peerhost,$query,$conn) = @_; |
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my ($rcode, @ans, @auth, @add); |
my ($rcode, @ans, @auth, @add); |
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|
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server->refresh; |
server->refresh; |
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$debug = server::debug; |
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|
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print "Received query from $peerhost to ". $conn->{"sockhost"}. "\n"; |
CouchDB::audit( 'request', { |
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$query->print; |
qname => $qname, |
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qclass => $qclass, |
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qtype => $qtype, |
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peerhost => $peerhost, |
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sockhost => $conn->{"sockhost"} |
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}); |
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|
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if ( $qtype eq "A" && $qname eq "pxelator" ) { |
$query->print if $debug; |
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my ($ttl, $rdata) = (3600, "172.16.10.1"); |
|
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push @ans, Net::DNS::RR->new("$qname $ttl $qclass $qtype $rdata"); |
my $local = $1 if $qname =~ m{^(.+)\.\Q$server::domain_name\E$}; |
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$rcode = "NOERROR"; |
$local = $qname if $qname !~ m{\.}; |
46 |
} elsif ( $qname eq "foo.example.com" ) { |
|
47 |
$rcode = "NOERROR"; |
my $ttl = 3600; |
48 |
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|
49 |
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my $audit = { source => 'unknown' }; |
50 |
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|
51 |
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if ( $local ) { |
52 |
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warn "local[$local] $qname $qtype"; |
53 |
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$rcode = "NOERROR"; |
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my $rdata; |
55 |
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if ( $qtype eq "A" && $local eq "server" ) { |
56 |
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$rdata = name_ip( $local, $server::ip ); |
57 |
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$audit->{source} = 'local'; |
58 |
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} else { |
59 |
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$rcode = "NXDOMAIN"; |
60 |
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} |
61 |
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|
62 |
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push @ans, Net::DNS::RR->new("$qname $ttl $qclass $qtype $rdata") if $ttl; |
63 |
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|
64 |
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} elsif ( $qtype eq 'PTR' && $qname =~ m{^([0-9\.]*)\.in-addr\.arpa$} ) { |
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if ( my $rdata = $ptr_cache->{$1} ) { |
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$rdata .= '.' . $server::domain_name; |
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push @ans, Net::DNS::RR->new("$qname $ttl $qclass $qtype $rdata"); |
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$audit->{source} = 'PTR'; |
69 |
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} else { |
70 |
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warn "## ",dump( $ptr_cache ); |
71 |
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$rcode = "NXDOMAIN"; |
72 |
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} |
73 |
} elsif ( my $packet = $res->query( $qname, $qtype ) ) { |
} elsif ( my $packet = $res->query( $qname, $qtype ) ) { |
74 |
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|
75 |
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$audit->{source} = 'upstream'; |
76 |
$packet->print; |
$packet->print; |
77 |
push @ans, $_ foreach $packet->answer; |
push @ans, $_ foreach $packet->answer; |
78 |
$rcode = "NOERROR"; |
$rcode = "NOERROR"; |
82 |
$rcode = "NXDOMAIN"; |
$rcode = "NXDOMAIN"; |
83 |
} |
} |
84 |
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|
85 |
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warn "rcode: $rcode ",dump( @ans ); |
86 |
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|
87 |
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$audit->{rcode} = $rcode; |
88 |
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$audit->{ans} = [ map { |
89 |
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my $data; |
90 |
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foreach my $n ( keys %$_ ) { |
91 |
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$data->{$n} = $_->{$n}; |
92 |
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} |
93 |
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$data; |
94 |
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} @ans ]; |
95 |
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|
96 |
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CouchDB::audit( 'response', $audit ); |
97 |
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|
98 |
# mark the answer as authoritive (by setting the 'aa' flag |
# mark the answer as authoritive (by setting the 'aa' flag |
99 |
return ($rcode, \@ans, \@auth, \@add, { aa => 1 }); |
return ($rcode, \@ans, \@auth, \@add, { aa => 1 }); |
100 |
} |
} |
106 |
Verbose => $debug, |
Verbose => $debug, |
107 |
) || die "couldn't create nameserver object\n"; |
) || die "couldn't create nameserver object\n"; |
108 |
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|
109 |
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CouchDB::audit('start', { port => 53, domain_name => $server::domain_name }); |
110 |
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warn "DNS $server::domain_name"; |
111 |
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|
112 |
$ns->main_loop; |
$ns->main_loop; |
113 |
} |
} |
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|
115 |
1; |
1; |