#!/usr/bin/perl -w
+use strict;
use IO::File;
use Data::Dumper;
+use vars qw($etcfile $where);
$etcfile= "/etc/bind/chiark-conf-gen.zones";
$where= '<built-in>';
+use vars qw($mode $verbosity $debug);
$mode= '';
$verbosity= 1;
-$fromroot= 0;
+$debug= 0;
+
+use vars qw($dig_owner $dig_type $dig_rdata);
while (@ARGV && $ARGV[0] =~ m/^\-/) {
$_= shift @ARGV;
last if m/^$/;
if (m/^quiet$/) { $verbosity=0; }
elsif (m/^verbose$/) { $verbosity=2; }
- elsif (m/^root$/) { $fromroot=1; }
elsif (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
else { usageerr("unknown option --$_"); }
last if m/^$/;
while (m/^./) {
if (s/^[ynf]//) { $mode=$&; }
- elsif (s/^r//) { $fromroot=1; }
elsif (s/^v//) { $verbosity=2; }
elsif (s/^q//) { $verbosity=0; }
+ elsif (s/^D//) { $debug++; }
elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
else { usageerr("unknown option -$&"); }
}
" -y --yes check and install\n".
" -n --no check only\n".
"additional options:\n".
-" -r --root check all the way back to the root\n".
" -q --quiet no output for OK zones\n".
" -v --verbose extra verbose\n";
}
cfg_fail("config filename $etcfile should have been absolute path of a file")
unless $etcfile =~ m,^/, && $etcfile !~ m,/$,;
+use vars qw($default_dir);
$default_dir= $etcfile;
$default_dir =~ s,/[^/]+$,,;
+use vars qw($slave_dir $slave_prefix $slave_suffix);
$slave_dir= 'slave';
$slave_prefix= '';
$slave_suffix= '';
+
+use vars qw(@self_ns @self_soa);
@self_ns= @self_soa= ();
+
+use vars qw(%zone_cfg @zone_cfg_list);
%zone_cfg= ();
@zone_cfg_list= ();
+
+use vars qw($output $default_output %output_contents);
$output= '';
$default_output= '';
%output_contents= ();
+use vars qw($check $install);
+$check= $mode !~ m/^f/;
+$install= $mode =~ m/^[yf]/;
+
read_config($etcfile);
+debug_dump('@zone_cfg_list %zone_cfg');
+process_zones($mode ? @zone_cfg_list : @ARGV);
+debug_dump('%output_contents');
+
-print Dumper(@zone_cfg_list), Dumper(%zone_cfg);
+#-------------------- configuration reading
sub cfg_fail ($) { die "$0: $where:\n $_[0]\n"; }
sub read_config ($) {
my ($if) = @_;
my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
- local ($_,$1,$2,$3);
+ local ($_);
$fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
for (;;) {
cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
$zone_cfg{$zone}{'file'}= $file;
$zone_cfg{$zone}{'style'}= $style;
- $zone_cfg{$zone}{'servers'}= @servers;
+ $zone_cfg{$zone}{'servers'}= [ @servers ];
+ $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
+ $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
$zone_cfg{$zone}{'output'}= $output;
push @zone_cfg_list, $zone;
}
$output_contents{$output}= '';
}
-__DATA__
+#-------------------- checking
+use vars qw($zone $cfg $warnings);
+$warnings= 0;
-sub lookup ($$) {
- my ($type,$domain) = @_;
- my ($c,@result);
- defined($c=open ADH, "-|") or die "$0: fork adnshost:\n $!\n";
+sub progress ($) {
+ return if !$verbosity;
+ print "$_[0]\n";
+}
+
+sub verbose ($) {
+ return if $verbosity<2;
+ print " $_[0]\n";
+}
+
+sub process_zones (@) {
+ my (@zones) = @_;
+ local ($zone,$cfg);
+
+ foreach $zone (@zones) {
+ $cfg= $zone_cfg{$zone} || {
+ 'style' => 'foreign',
+ 'servers' => [ ],
+ };
+ progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
+ if ($check) {
+ eval { zone_check() };
+ zone_warning("checks failed: $@") if length $@;
+ }
+ zone_output() if $install;
+ }
+}
+
+sub zone_warning ($) {
+ my ($w) = @_;
+ $w =~ s/\n$//;
+ $w =~ s,\n, // ,g;
+ print STDERR "$zone: warning: $w\n" or die $!;
+ $warnings++;
+}
+
+sub zone_warnmore ($) {
+ print STDERR " $_[0]\n" or die $!;
+}
+
+use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
+use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
+use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
+use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
+use vars qw(%addr_is_ok);
+use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
+use vars qw(@to_check_soa); # ($addr,$whyask, ...)
+
+sub zone_check () {
+ my ($super_zone, @super_nsnames,
+ $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
+ %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
+
+ %delgs= %auths= %glue= %soas= %addr_is_ok= ();
+ @to_check= @to_check_soa= ();
+
+ $super_zone= $zone;
+ for (;;) {
+ debug_trace("zone $zone superzone $super_zone");
+ $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
+ ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
+ last if !$rcode;
+ }
+ for $super_ns (@super_nsnames) {
+ $super_ns= lc $super_ns;
+ ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
+ foreach $addr (@super_ns_addrs) {
+ push @to_check,
+ $addr,
+ "$super_ns, server for $super_zone",
+ 0, 0;
+ }
+ }
+ for (;;) {
+ # We do these in order so that we always do NS RRset checks on
+ # nameservers that came from other NS RRsets first; otherwise
+ # we might set nsrrset_checked due to a glueless_ok check,
+ # and then not check for gluefulness later.
+ debug_dump('@to_check @to_check_soa');
+ if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
+ push @to_check_soa, $addr, $wa if $is_auth;
+ next if $nsrrset_checked{$addr}++;
+ zone_check_nsrrset($addr, "[$addr] $wa",
+ $is_auth, $glueless_ok);
+ } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
+ next if $soa_checked{$addr}++;
+ zone_check_soa($addr,"[$addr] $wa");
+ } else {
+ last;
+ }
+ }
+ zone_consistency();
+}
+
+sub zone_check_nsrrset ($$$$) {
+ my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
+ my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
+ verbose("checking delegation by $ww");
+ dig(sub {
+ if ($dig_type eq 'ns' && $dig_owner eq $zone) {
+ $s2g{lc $dig_rdata} = [ ];
+ } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
+ push @to_check,
+ $dig_rdata,
+ "$dig_owner, in glue from $ww",
+ 1, 0;
+ $addr_is_ok{$dig_rdata}= "$dig_owner (NS [$uaddr])"
+ if $cfg->{'style'} eq 'stealth';
+ push @{ $s2g{$dig_owner} }, $dig_rdata;
+ }
+ },
+ $zone,'ns',$uaddr);
+ if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
+ elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
+ @s= sort keys %s2g;
+ foreach $s (@s) {
+ @glue= @{ $s2g{$s} };
+ if (!@glue) {
+ zone_warning("glueless NS $s, from $ww") unless $glueless_ok;
+ next;
+ }
+ $glue= join ' ', sort @glue;
+ push @{ $glue{$s}{$glue} }, $ww;
+ }
+ $s= join ' ', @s;
+ $delgs_or_auths= $is_auth ? \%auths : \%delgs;
+ push @{ $delgs_or_auths->{$s} }, $ww;
+}
+
+sub zone_check_soa ($$) {
+ my ($uaddr,$ww) = @_;
+ my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
+ verbose("checking service at $ww");
+ $lame= 'dead or lame';
+ dig(sub {
+ if ($dig_type eq 'flags:') {
+ $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
+ } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
+ die "several SOAs ? $ww" if defined $origin;
+ $got= $dig_rdata;
+ $got =~ m/^(\S+) \d+/ or die "$got ?";
+ $origin= $1;
+ }
+ },
+ $zone,'soa',$uaddr);
+ $lame= 'broken' if !$lame && !defined $origin;
+ if ($lame) { zone_warning("$lame server $ww"); return; }
+ push @{ $soas{$got} }, $ww;
+ ($rcode,@soa_addrs)= lookup($origin,'a','0');
+ foreach $soa_addr (@soa_addrs) {
+ $addr_is_ok{$soa_addr}= "$origin (SOA [$uaddr])";
+ push @to_check,
+ $soa_addr,
+ "$origin, SOA ORIGIN from $ww";
+ }
+}
+
+sub zone_consistency() {
+ my ($d, $org_ser, $origin, $a, $showok, $h);
+ zone_consistency_set('delegations',\%delgs);
+ foreach $d (keys %delgs) { delete $auths{$d}; }
+ zone_consistency_set('zone nameserver rrset',\%auths);
+ foreach $h (keys %glue) {
+ zone_consistency_set("glue for $h", $glue{$h});
+ }
+ zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
+ if ($cfg->{'style'} eq 'primary') {
+ foreach $org_ser (keys %soas) {
+ $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
+ $origin= $1;
+ next if grep { $_ eq $origin } @self_soa;
+ zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
+ " eg from ".((values %{ $soas{$org_ser} })[1]));
+ }
+ }
+ if (%addr_is_ok) {
+ $showok= 0;
+ foreach $a (@{ $cfg->{'servers'} }) {
+ next if exists $addr_is_ok{$a};
+ zone_warning("we slave from $a"); $showok=1;
+ }
+ if ($showok) {
+ foreach $a (keys %addr_is_ok) {
+ zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
+ }
+ }
+ }
+}
+
+sub zone_consistency_set ($%) {
+ my ($msg,$set) = @_;
+ my ($d,$o);
+ if (keys(%$set) > 1) {
+ zone_warning("inconsistent $msg:");
+ foreach $d (keys %$set) {
+ foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
+ }
+ }
+}
+
+
+#-------------------- outputting
+
+sub zone_output () {
+ $output_contents{$$cfg{'output'}}.=
+ sprintf(<<'END',
+zone "%s" {
+ type %s;
+ file "%s";
+};
+END
+ $zone,
+ $$cfg{'style'} eq 'primary' ? 'master' : 'slave',
+ $$cfg{'file'});
+}
+
+
+#-------------------- general utilities
+
+sub debug_dump ($) {
+ my ($vn);
+ return unless $debug>1;
+ local $Data::Dumper::Terse=1;
+ foreach $vn (split /\s+/, $_[0]) {
+ print "$vn := ", eval "Dumper(\\$vn)";
+ }
+}
+
+sub debug_trace ($) {
+ return unless $debug;
+ print "D $_[0]\n";
+}
+
+sub lookup ($$$) {
+ my ($domain,$type,$okrcodes) = @_;
+ my ($c,$h,@result);
+ debug_trace("lookup ==> (->$okrcodes) $domain $type");
+ $h= new IO::Handle;
+
+ defined($c= open $h, "-|") or die "$0: fork adnshost:\n $!\n";
if (!$c) {
- exec 'adnshost','+Do','+Dt','+Dc','-Cf',"-t$type",
+ exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
'-',"$domain.";
die "$0: exec adnshost:\n $!\n";
}
- @result= <ADH>;
+ @result= $h->getlines();
+ $h->error and die "$0: read from adnshost:\n $!\n";
chomp @result;
- $!=0; close ADH;
- die "$0: lookup -t$type $domain failed $? $!\n" if $? or $!;
- return @result;
+ $!=0; $h->close;
+ die "$0: lookup -t$type $domain $okrcodes failed $? $!\n"
+ if $! or $?>6 or index($okrcodes,$?)<0;
+ debug_trace("lookup <== $? @result");
+ return ($?,@result);
}
+
+sub dig (&$$$) {
+ my ($eachrr, $qowner,$qtype,$qaddr) = @_;
+ # also pseudo-rr with type `flags:'
+ my ($h,$inmid,$irdata,$c);
+ local ($_);
+
+ debug_trace("dig ==> \@$qaddr $qowner $qtype");
+
+ $h= new IO::Handle;
+ defined($c= open $h, "-|") or die "$0: fork dig:\n $!\n";
+ if (!$c) {
+ open STDERR, ">&STDOUT" or die $!;
+ exec ('dig',
+ '+nodef','+nosea','+nodebug','+norecurse',
+ "\@$qaddr",'-t',$qtype,$qowner);
+ die "$0: exec dig:\n $!\n";
+ }
+ $inmid='';
+ for (;;) {
+ if (!defined($_= $h->getline())) {
+ $h->error() and die "$0: read from dig:\n $!\n";
+ last;
+ }
+ chomp;
+ if (length $inmid) {
+ s/^\s+/ / or die "$inmid // $_ ?";
+ s/\;.*$//;
+ $_= $inmid.$_;
+ $inmid='';
+ s/$/ \(/ unless s/\s*\)\s*$//;
+ }
+ if (s/\s*\(\s*$//) { $inmid= $_; next; }
+ if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
+ $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
+ debug_trace("dig f: $dig_rdata");
+ &$eachrr;
+ } elsif (m/^\;/) {
+ } elsif (!m/\S/) {
+ } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
+ $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
+ if ($dig_type eq 'a') {
+ $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
+ $dig_rdata= $&;
+ } elsif ($dig_type eq 'ns') {
+ $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
+ $dig_rdata= domain_canon($irdata);
+ } elsif ($dig_type eq 'soa') {
+ $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
+ or die "bad SOA $irdata ?";
+ $dig_rdata= domain_canon($1).' '.$2;
+ } else {
+ debug_trace("ignoring uknown RR type $dig_type");
+ next;
+ }
+ debug_trace("dig $dig_owner $dig_type $dig_rdata");
+ &$eachrr;
+ } else {
+ debug_trace("ignoring unknown dig output $_");
+ }
+ }
+ $h->close;
+ debug_trace("dig <== gave $?");
+}
+
+sub domain_canon ($) {
+ local ($_) = @_;
+ s/(.)\.$/$1/;
+ return lc $_;
+}
+
+__DATA__
+
+
+
+
sub lookup1 ($$) {
my ($type,$domain) = @_;
my (@result)= lookup($type,$domain);
for f in $zones
do
zone="`echo $f | sed -e 's/_db$//'`"
- cat <<END
-zone "$zone" {
- type master;
- file "primary/$f";
-};
END
done
endfile
~ian / chiark-utils.git / blobdiff