438 lines
9.1 KiB
Perl
Executable File
438 lines
9.1 KiB
Perl
Executable File
#!/usr/bin/perl -Tw
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# $Id: ns.pl,v 1.6 2005/10/11 11:44:28 olaf Exp $
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use Net::DNS;
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use Net::DNS::Nameserver;
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use Net::DNS::SEC;
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use strict;
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use Math::RPN;
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my $versionstring='"BSRPDNSC version 0.2.4"';
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my $rpdomain=lc "rp.secret-wg.org.";
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my $rp_ns_name=lc "ns.rp.secret-wg.org";
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my $rp_ns_address="213.154.224.43";
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my $rp_ns_bind_address="213.154.224.43";
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my $rp_ns_port="53";
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my $reply_ttl=10;
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my $sig_val=60;
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my $keypath="/home/olaf/RPNS/Krp.secret-wg.org.+001+27900.private";
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my $www_address="193.0.4.49";
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my $timeout=$sig_val*60-3*$reply_ttl; # resigns itself after so often
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print "Using Net::DNS version ".$Net::DNS::VERSION."\n";
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print "Using Net::DNS::SEC version ".$Net::DNS::SEC::VERSION."\n";
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my %sigargs;
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$sigargs{"ttl"} = $reply_ttl;
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$sigargs{"sigval"}= $sig_val;
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my ( @keyRR, $keySIGRR,@versionRR,$nsASIGRR,@nsARR,$nsSIGRR,@nsRR,@apexNSECRR,$apexNSECSIGRR,@nsNSECRR,$nsNSECSIGRR,$soaSIGRR,@soaRR );
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my $private=Net::DNS::SEC::Private->new($keypath);
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use Tie::Syslog;
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my $x=tie *STDOUT, 'Tie::Syslog', 'daemon.info','RPNS','pid','unix';
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print "Restarting the server";
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resign();
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alarm $timeout;
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my $ns = Net::DNS::Nameserver->new(
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LocalAddr => $rp_ns_bind_address,
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LocalPort => $rp_ns_port,
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ReplyHandler => \&reply_handler,
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Verbose => 1
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);
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$SIG{ALRM} = sub { print "alarm after $timeout seconds (to regenerate SIGs)\n";
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resign () };
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sub resign {
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@keyRR= (
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Net::DNS::RR->new( "rp.secret-wg.org. 10 IN DNSKEY 256 3 1 AQPkQwQiwlTBYvK8xOx18oOqSpLjuTDmDlfcVUd2Oy5ZWyG2PxN+jDW3 0PQo9Tme337mJfG4s/1m72FjK7xHbPyX")
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)
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;
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$keySIGRR= create Net::DNS::RR::RRSIG(\@keyRR,
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$private,
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%sigargs,
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);
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@versionRR=(
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Net::DNS::RR->new('version.bind 0 CH TXT '.$versionstring),
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Net::DNS::RR->new('version.bind 0 CH TXT "http://bert.secret-wg.org/Tools tool 3"')
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);
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@nsARR=
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(Net::DNS::RR->new("$rp_ns_name $reply_ttl IN A $rp_ns_address"),
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);
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$nsASIGRR= create Net::DNS::RR::RRSIG(\@nsARR,
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$private,
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%sigargs,
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);
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@nsRR=
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(Net::DNS::RR->new("$rpdomain $reply_ttl IN NS $rp_ns_name"),
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);
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$nsSIGRR= create Net::DNS::RR::RRSIG(\@nsRR,
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$private,
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%sigargs,
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);
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@apexNSECRR=
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(Net::DNS::RR->new("$rpdomain $reply_ttl IN NSEC $rpdomain NSEC RRSIG SOA DNSKEY"),
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);
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$apexNSECSIGRR= create Net::DNS::RR::RRSIG(\@apexNSECRR,
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$private,
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%sigargs,
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);
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@nsNSECRR=
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(Net::DNS::RR->new("$rp_ns_name $reply_ttl IN NSEC $rpdomain NSEC RRSIG A"),
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);
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$nsNSECSIGRR= create Net::DNS::RR::RRSIG(\@nsNSECRR,
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$private,
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%sigargs,
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);
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@soaRR=
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( Net::DNS::RR->new("$rpdomain $reply_ttl IN SOA $rp_ns_name bert.secret-wg.org 1 20000 20000 100000 10")
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);
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$soaSIGRR= create Net::DNS::RR::RRSIG(\@soaRR,
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$private,
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%sigargs,
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);
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}
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my $runas = 'nobody';
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# Change effective id
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$> = getpwnam($runas);
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sub reply_handler {
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my ($qname, $qclass, $qtype,$peerhost, $query ) = @_;
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my ($rcode, @ans, @auth, @add,);
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$query->print;
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my $opt;
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$opt= ($query->additional)[0] if ( $query->additional &&
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(($query->additional)[0]->type eq "OPT")
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);
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if ($qclass eq "CH"){
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if (lc($qname) eq "version.bind" && $qtype eq "TXT" ){
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push @ans, @versionRR;
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$rcode="NOERROR";
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}else{
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$rcode="REFUSED";
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}
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}elsif (lc($qname) eq $rp_ns_name){
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if ($qtype eq "A"){
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push @ans, @nsARR;
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push @ans, $nsASIGRR if $opt;
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push @add, @keyRR if $opt;
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}elsif($qtype eq "ANY"){
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push @ans, @nsARR;
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push @ans, $nsASIGRR;
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push @ans, @nsNSECRR;
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push @ans, $nsNSECSIGRR;
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push @add, @keyRR if $opt;
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}else{
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my $ttl = $reply_ttl;
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push @auth, @soaRR;
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push @auth, $soaSIGRR if $opt;
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push @auth, @apexNSECRR if $opt;
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push @auth, $apexNSECSIGRR if $opt;
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push @add, @keyRR if $opt;
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}
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$rcode = "NOERROR";
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}elsif (lc($qname)."." eq $rpdomain){
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if ($qtype eq "NS"){
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push @ans, @nsRR;
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push @ans, $nsSIGRR if $opt;
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push @add, @nsARR;
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push @add, $nsASIGRR if $opt;
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}elsif ($qtype eq "SOA"){
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push @ans, @soaRR;
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push @ans, $soaSIGRR if $opt;
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push @auth, @nsRR;
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push @auth, $nsSIGRR if $opt;
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push @add, @nsARR;
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push @add, $nsASIGRR if $opt;
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push @add, @keyRR if $opt;
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}elsif ($qtype eq "DNSKEY"){
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push @ans, @keyRR;
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push @ans, $keySIGRR if $opt;
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} elsif ($qtype eq "ANY"){
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push @ans, @soaRR;
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push @ans, $soaSIGRR;
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push @ans, @apexNSECRR;
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push @ans, $apexNSECSIGRR;
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push @ans, @keyRR;
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push @ans, $keySIGRR;
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}else{
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my $ttl = $reply_ttl;
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push @auth, @soaRR;
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push @auth, $soaSIGRR if $opt;
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push @auth, @apexNSECRR if $opt;
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push @auth, $apexNSECSIGRR if $opt;
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push @add, @keyRR if $opt;
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}
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$rcode = "NOERROR";
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}elsif ($qtype eq "NSEC" ){
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my @nxtRR=(
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Net::DNS::RR->new("$qname $reply_ttl IN NSEC $rpdomain A NSEC TXT RRSIG ")
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);
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push @ans, @nxtRR ;
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if ($opt){
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my $nxtSIGRR= create Net::DNS::RR::RRSIG(\@nxtRR,
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$private,
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%sigargs,
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) ;
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push @ans, $nxtSIGRR;
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}
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$rcode = "NOERROR";
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}elsif ( $qtype eq "A" ) {
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my $ARR=Net::DNS::RR->new("$qname $reply_ttl IN A $www_address");
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my @ARR = (
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$ARR
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);
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push @ans, @ARR ;
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my $ASIGRR;
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if ($opt ) {
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$ASIGRR= create Net::DNS::RR::RRSIG(\@ARR,
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$private,
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%sigargs,
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) ;
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push @ans, $ASIGRR;
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}
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$rcode="NOERROR";
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} elsif ($qtype eq "TXT" || $qtype eq "ANY") { # Any name not the origin or the NS RR.
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if ($qname =~ /666\.666\.\+\.rp\.secret-wg\.org$/ ){
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if ($qname eq "666.666.+.rp.secret-wg.org"){
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my @nsRR=
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(Net::DNS::RR->new("$rpdomain $reply_ttl IN NS $rp_ns_name"),
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);
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my $nsSIGRR= create Net::DNS::RR::RRSIG(\@nsRR,
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$private,
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%sigargs,
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);
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my @nxtRR=(
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Net::DNS::RR->new("666.666.+.rp.secret-wg.org $reply_ttl IN NSEC 666.666.+.rp.secret-wg.org NS NSEC RRSIG ")
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);
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my $nxtSIGRR= create Net::DNS::RR::RRSIG(\@nxtRR,
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$private,
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%sigargs,
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) ;
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push @auth, @nsRR;
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push @auth, $nsSIGRR;
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push @auth, @nxtRR;
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push @auth, $nxtSIGRR;
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push @add, @keyRR if $opt;
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$rcode = "NOERROR";
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}else{ # Anything below 666.666
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my @nxtRR=(
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Net::DNS::RR->new("666.666.+.rp.secret-wg.org $reply_ttl IN NSEC 666.666.+.rp.secret-wg.org DS NSEC RRSIG ")
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);
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my $nxtSIGRR= create Net::DNS::RR::RRSIG(\@nxtRR,
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$private,
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%sigargs,
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) ;
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push @auth, @soaRR;
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push @auth, $soaSIGRR if $opt;
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push @auth, @nxtRR if $opt;
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push @auth, $nxtSIGRR if $opt;
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push @add, @keyRR if $opt;
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$rcode = "NXDOMAIN";
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}
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}else{ # end special processing 666.666.rp.secret-wg.org
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my $param=$qname;
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$param=~s/rp\.secret-wg\.org$//;
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$param=~s/\,/---deciMalPoiNt---/g;
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$param=~s/\\\./---deciMalPoiNt---/g;
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$param=~s/\./\,/g;
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$param=~s/---deciMalPoiNt---/\./g;
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my $answer=rpn($param);
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if (!defined($answer)){
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$rcode="SERVFAIL";
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}else{
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my $ttl = $reply_ttl;
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my $answerRR=Net::DNS::RR->new("$qname $ttl IN TXT \'$answer\'");
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my @answerRR = (
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$answerRR
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);
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push @ans, @answerRR ;
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my $answerSIGRR;
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if ($opt || $qtype eq "ANY" ) {
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$answerSIGRR= create Net::DNS::RR::RRSIG(\@answerRR,
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$private,
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%sigargs,
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) ;
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push @ans, $answerSIGRR;
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}
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if ($qtype eq "ANY" ){
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my $ARR=Net::DNS::RR->new("$qname $ttl IN A $www_address");
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my @ARR = (
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$ARR
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);
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push @ans, @ARR ;
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my $ASIGRR= create Net::DNS::RR::RRSIG(\@ARR,
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$private,
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%sigargs,
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) ;
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push @ans, $ASIGRR;
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my @nxtRR=(
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Net::DNS::RR->new("$qname $reply_ttl IN NSEC $rpdomain A NSEC TXT RRSIG ")
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);
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push @ans, @nxtRR ;
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my $nxtSIGRR= create Net::DNS::RR::RRSIG(\@nxtRR,
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$private,
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%sigargs,
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) ;
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push @ans, $nxtSIGRR;
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}
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}
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$rcode = "NOERROR";
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} # END of processing anything that is not 666.666
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} else {
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my $ttl = $reply_ttl;
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my @nxtRR=(
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Net::DNS::RR->new("$qname $reply_ttl IN NSEC $rpdomain NSEC TXT RRSIG ")
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);
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my $nxtSIGRR= create Net::DNS::RR::RRSIG(\@nxtRR,
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$private,
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%sigargs,
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) if $opt;
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push @auth, @soaRR;
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push @auth, $soaSIGRR if $opt;
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push @auth, @nxtRR if $opt;
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push @auth, $nxtSIGRR if $opt;
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push @add, @keyRR if $opt;
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$rcode = "NOERROR";
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}
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push @add,$opt if $opt;
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return ($rcode, \@ans, \@auth, \@add, {aa=>1}) if $rcode eq "NXDOMAIN";
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return ($rcode, \@ans, \@auth, \@add, {aa=>1}) if $rcode eq "NOERROR";
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return ($rcode, \@ans, \@auth, \@add);
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}
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if ($ns) {
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$ns->main_loop;
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}
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else {
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die "couldn't create nameserver object\n";
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}
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