11 $debug $needglue $localonly $verbosity);
13 $quis= $0; $quis =~ s,.*/,,;
17 $etcfile= "/etc/bind/chiark-conf-gen.zones";
24 use vars qw($dig_owner $dig_type $dig_rdata);
26 while (@ARGV && $ARGV[0] =~ m/^\-/) {
30 if (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
31 elsif (m/^all$/) { $doall=1; }
32 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
33 elsif (m/^glueless$/) { $needglue--; }
34 elsif (m/^localonly$/) { $localonly=1; }
35 elsif (m/^quiet$/) { $verbosity=0; }
36 elsif (m/^verbose$/) { $verbosity=2; }
37 else { usageerr("unknown option --$_"); }
42 if (s/^[ynf]//) { $mode=$&; }
43 elsif (s/^A//) { $doall=1; }
44 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
45 elsif (s/^D//) { $debug++; }
46 elsif (s/^g//) { $needglue--; }
47 elsif (s/^l//) { $localonly=1; }
48 elsif (s/^q//) { $verbosity=0; }
49 elsif (s/^v//) { $verbosity=2; }
50 else { usageerr("unknown option -$&"); }
55 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
56 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
58 usageerr("-g may be specified at most twice") if $needglue<0;
59 usageerr("-D may be specified at most twice") if $debug>2;
60 usageerr("must specify either -f|-y|-n or zones (and not both)")
61 if !!$mode == !!@ARGV;
66 usage: named-conf-regen [-rvq] -f|-y|-n|<zone>...\n".
68 " -f --force install without checking\n".
69 " -y --yes check and install\n".
70 " -n --no check only\n".
71 "additional options:\n".
72 " -q --quiet no output for OK zones\n".
73 " -v --verbose extra verbose\n";
76 cfg_fail("config filename $etcfile should not be directory")
79 use vars qw($default_dir);
80 $default_dir= $etcfile =~ m,^.*/, ? $& : './';
82 use vars qw($slave_dir $slave_prefix $slave_suffix);
87 use vars qw(@self_ns @self_soa @self_addr);
88 @self_ns= @self_soa= @self_addr= ();
90 use vars qw(%zone_cfg @zone_cfg_list);
94 use vars qw($output $default_output %output_contents);
99 use vars qw($check $install);
100 $check= $mode !~ m/^f/;
101 $install= $mode =~ m/^[yf]/;
103 read_config($etcfile);
104 debug_dump('@zone_cfg_list %zone_cfg');
105 process_zones($mode ? @zone_cfg_list : @ARGV);
106 debug_dump('%output_contents');
107 output_files() if $install;
111 #-------------------- configuration reading
113 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
115 sub read_config ($) {
117 my ($fh,$z,@self,$before,
118 $mod,$dir,$prefix,$suffix,$subfile,$lprefix,$lsuffix,$zf);
121 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
124 if (!defined($_= <$fh>)) {
125 cfg_fail("read config file $if:\n $!") if $fh->error();
129 if (m/\\$/) { $before.= $_; next; }
137 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
138 @self= split /\s+/, $2;
139 @self_ns= @self if $1 ne '-soa';
140 @self_soa= @self if $1 ne '-ns';
141 } elsif (m/^self\-addr\s+([0-9. \t]+)/) {
142 @self_addr= split /\s+/, $1;
146 (?: \s+ ([^/ \t]*) (?: (/.+) )?
149 ($mod, $dir, $prefix, $suffix, $subfile) =
150 ($1,qualify($2),$3,$4,$5);
151 $suffix= '' if !defined $suffix;
152 $subfile= '' if !defined $subfile;
153 $suffix= '_db' if !length $suffix && !length $subfile;
154 if (-d "$dir/$prefix") { $dir.='/'; $dir.=$prefix; $prefix=''; }
155 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
156 $lprefix= length $prefix; $lsuffix= length $suffix;
157 while (defined($_= readdir D)) {
158 next if m/^\./ && !$lprefix;
159 next unless length > $lprefix+$lsuffix;
160 next unless substr($_,0,$lprefix) eq $prefix;
161 next unless substr($_,length($_)-$lsuffix) eq $suffix;
162 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
163 $zf= $dir.'/'.$prefix.$z.$suffix.$subfile;
165 next if length $subfile && $! == &ENOENT;
166 cfg_fail("cannot stat zonefile $zf:\n $!");
168 -f _ or cfg_fail("zonefile $zf is not a plain file");
169 zone_conf($z,'primary','p',$mod,$zf);
171 closedir D or cfg_fail("close primary-dir $dir:\n $!");
172 } elsif (m/^primary([*?]?)\s+(\S+)\s+(\S+)$/) {
173 zone_conf($2,'primary','p',$1,qualify($3));
174 } elsif (m/^published([*?]?)\s+(\S+)\s+([0-9.\t]+)$/) {
175 zone_conf($2,'published','s',$1,'',$3);
176 } elsif (m/^stealth([*?]?)\s+(\S+)\s+([0-9. \t]+)$/) {
177 zone_conf($2,'stealth','u',$1,'',split /\s+/, $3);
178 } elsif (m/^slave\-dir\s+(\S+)(?:(?:\s+(\S+))\s+(\S+))?$/) {
179 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
180 $slave_prefix='' if !defined $slave_prefix;
181 $slave_suffix='' if !defined $slave_suffix;
182 } elsif (m/^output\s+bind8\+(\S+)$/) {
183 cfg_fail("default output may not apply to only some zones")
184 if @zone_cfg_list && length $default_output;
185 set_output(qualify($1));
186 } elsif (m/^include\s+(\S+)$/) {
189 cfg_fail("unknown configuration directive".
190 " or incorrect syntax or arguments");
193 $fh->close or cfg_fail("close config file $if:\n $!");
198 $i= "$default_dir$i" unless $i =~ m,^/,;
202 sub zone_conf ($$$$$@) {
203 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
205 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
207 if (!length $output) {
208 $default_output= qualify('chiark-conf-gen.bind8')
209 unless length $default_output;
210 set_output($default_output);
212 cfg_fail("redefined zone $zone\n".
213 " earlier definition $zone_cfg{$zone}{'where'}")
214 if exists $zone_cfg{$zone};
215 $zone_cfg{$zone}{'where'}= $where;
216 $zone_cfg{$zone}{'file'}= $file;
217 $zone_cfg{$zone}{'style_p'}= $style.$mod;
218 $zone_cfg{$zone}{'s'}= $sabbr.$mod; # p)rimary s)econdary u)npub f)oreign
219 $zone_cfg{$zone}{'servers'}= [ @servers ];
220 foreach $sfx (qw(soa ns addr)) {
221 { no strict 'refs'; $aref= [ @{ "self_$sfx" } ]; }
222 @$aref or cfg_fail("failed to specify self-$sfx before zone");
223 $zone_cfg{$zone}{"self_$sfx"}= $aref;
225 $zone_cfg{$zone}{'output'}= $output;
226 push @zone_cfg_list, $zone;
232 $output_contents{$output}= '';
236 #-------------------- checking
238 use vars qw($zone $cfg $warnings);
242 return if !$verbosity;
247 return if $verbosity<2;
251 sub process_zones (@) {
255 foreach $zone (@zones) {
256 $cfg= $zone_cfg{$zone} || {
257 'style_p' => 'foreign',
261 progress(sprintf "%-40s %s", $zone, $$cfg{'style_p'});
262 if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) {
264 if ($localonly && $cfg->{'s'} =~ m/f/) {
265 zone_warning("foreign zone specified with -l");
266 } elsif ($cfg->{'s'} =~ m/\*/ ||
267 ($localonly && $cfg->{'s'} !~ m/p/)) {
273 zone_warning("checks failed: $@") if length $@;
275 $output_contents{$$cfg{'output'}} .= zone_output()
278 print STDERR "$quis: $warnings warnings\n" or die $!
282 sub zone_warning ($) {
286 print STDERR "$zone: warning: $w\n" or die $!;
290 sub zone_warnmore ($) {
291 print STDERR "$zone: $_[0]\n" or die $!;
294 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
295 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
296 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
297 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
298 use vars qw(%addr_is_ok %warned_glueless %warned_mynameaddr);
299 use vars qw($delg_to_us);
300 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
301 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
303 sub zone_check_full () {
311 %delgs= %auths= %glue= %soas=
312 %warned_glueless= %warned_mynameaddr=
315 @to_check= @to_check_soa= ();
318 sub zone_investigate() {
319 my ($super_zone, @super_nsnames,
320 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
321 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
325 debug_trace("zone $zone superzone $super_zone");
326 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
327 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
330 for $super_ns (@super_nsnames) {
331 $super_ns= lc $super_ns;
332 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
333 foreach $addr (@super_ns_addrs) {
336 "$super_ns, server for $super_zone",
341 # We do these in order so that we always do NS RRset checks on
342 # nameservers that came from other NS RRsets first; otherwise
343 # we might set nsrrset_checked due to a glueless_ok check,
344 # and then not check for gluefulness later.
345 debug_dump('@to_check @to_check_soa');
346 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
347 push @to_check_soa, $addr, $wa if $is_auth;
348 next if $nsrrset_checked{$addr}++;
349 zone_check_nsrrset($addr, "[$addr] $wa",
350 $is_auth, $glueless_ok);
351 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
352 next if $soa_checked{$addr}++;
353 zone_check_soa($addr,"[$addr] $wa","[$addr] NS");
360 sub zone_check_nsrrset ($$$$) {
361 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
362 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths, $wwn);
363 verbose("checking delegation by $ww");
365 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
366 $s2g{lc $dig_rdata} = [ ];
367 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
368 $wwn= "in glue from $ww";
369 push @to_check, $dig_rdata, "$dig_owner, $wwn", 1, 0;
370 zone_server_addr($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
371 push @{ $s2g{$dig_owner} }, $dig_rdata;
375 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
376 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
379 @glue= @{ $s2g{$s} };
381 zone_warning("glueless NS $s,".
382 ($needglue<=1 ? " (eg)" : "").
384 unless $glueless_ok || !$needglue ||
385 ($needglue<=1 && $warned_glueless{$s}++);
388 $glue= join ' ', sort @glue;
389 push @{ $glue{$s}{$glue} }, $ww;
392 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
393 push @{ $delgs_or_auths->{$s} }, $ww;
396 sub zone_server_addr ($$$$$) {
397 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
398 $addr_is_ok{$addr}= "$name ($wwq)"
399 if $is_soa || $cfg->{'s'} =~ m/u/;
400 zone_warning("configured as stealth but we [$addr]".
401 " are published ($name $wwq)")
402 if $cfg->{'s'} =~ m/u/ && grep { $_ eq $addr } @self_addr;
404 my ($name_is_self, $addr_is_self);
405 $name_is_self= grep { $_ eq $name }
406 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
407 $addr_is_self= grep { $_ eq $addr }
408 @{ $cfg->{'self_addr'} };
409 if ($name_is_self && !$addr_is_self) {
410 zone_warning("our name $name with wrong address [$addr], (eg) $ww")
411 unless $warned_mynameaddr{$name}{$addr}++;
412 } elsif (!$name_is_self && $addr_is_self) {
413 zone_warning(($is_soa ? "SOA ORIGIN maps to" : "allegedly served by").
414 " us [$addr] with wrong name $name, (eg) $ww")
415 unless $warned_mynameaddr{$name}{$addr}++;
417 $delg_to_us=1 if $name_is_self;
420 sub zone_check_soa ($$$) {
421 my ($uaddr,$ww,$wwq) = @_;
422 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr,$wwn);
423 verbose("checking service at $wwq");
424 $lame= 'dead or lame';
426 if ($dig_type eq 'flags:') {
427 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
428 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
429 die "several SOAs ? $ww" if defined $origin;
431 $got =~ m/^(\S+) \d+/ or die "$got ?";
436 $lame= 'broken' if !$lame && !defined $origin;
437 if ($lame) { zone_warning("$lame server $ww"); return; }
438 push @{ $soas{$got} }, $ww;
439 ($rcode,@soa_addrs)= lookup($origin,'a','0');
440 foreach $soa_addr (@soa_addrs) {
441 $wwn= "SOA ORIGIN from $ww";
442 zone_server_addr($soa_addr,$origin,$wwn,"SOA [$uaddr]",1);
443 push @to_check, $soa_addr, "$origin, $wwn";
447 sub zone_consistency() {
448 my ($d, $org_ser, $origin, $a, $h, $self_soa);
449 zone_consistency_set('delegations',\%delgs);
450 foreach $d (keys %delgs) { delete $auths{$d}; }
451 zone_consistency_set('zone nameserver rrset',\%auths);
452 foreach $h (keys %glue) {
453 zone_consistency_set("glue for $h", $glue{$h});
455 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
456 $self_soa= $cfg->{'self_soa'};
457 if ($cfg->{'s'} =~ m/p/) {
458 foreach $org_ser (keys %soas) {
459 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
461 next if grep { $_ eq $origin } @$self_soa;
462 zone_warning("SOA ORIGIN $origin is not our name (@$self_soa),".
463 " eg from ".($soas{$org_ser}[0]));
468 sub zone_servers_ok () {
472 foreach $a (@{ $cfg->{'servers'} }) {
473 next if exists $addr_is_ok{$a};
474 zone_warning("we slave from $a"); $showok=1;
477 foreach $a (keys %addr_is_ok) {
478 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
482 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
483 zone_warning("we are supposedly published secondary,".
484 " but not listed as a nameserver");
488 sub zone_consistency_set ($%) {
491 if (keys(%$set) > 1) {
492 zone_warning("inconsistent $msg:");
493 foreach $d (keys %$set) {
494 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
499 sub zone_check_local () {
501 zone_servers_simplefind();
505 sub zone_servers_simplefind () {
506 my ($rcode,@nsnames,$ns,@soas,$origin);
508 ($rcode,@nsnames)= lookup($zone,'ns-','0');
509 foreach $ns (@nsnames) { zone_server_simple($ns,'NS',0); }
511 ($rcode,@soas)= lookup($zone,'soa','0');
512 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
513 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
514 zone_server_simple(domain_canon($1),'SOA',1);
517 sub zone_server_simple ($$$) {
518 my ($name,$ww,$is_soa) = @_;
519 my ($rcode,@addrs,$addr);
520 ($rcode,@addrs)= lookup($name,'a','0');
521 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
524 #-------------------- outputting
529 $o= "zone \"$zone\" {\n";
530 if ($$cfg{'s'} =~ m/p/) {
531 $o.= " type master;\n";
533 $o.= " type slave;\n".
535 foreach $m (@{ $$cfg{'servers'} }) { $o.= " $m;\n"; }
538 $o.= " file \"$$cfg{'file'}\";\n";
543 sub output_files () {
544 my ($fn,$ofn,$mfn,$l,$dir, $maxmode,$h,@to_install);
546 foreach $ofn (keys %output_contents) {
547 $fn= $ofn; $mfn= "output file $fn";
550 $! == &ENOENT or die "$quis: stat $mfn:\n $!\n";
554 $maxmode= (stat _)[2];
557 defined($l= readlink $fn)
558 or die "$quis: readlink $mfn:\n $!\n";
559 $dir= $fn =~ m,^.*/, ? $& : './';
560 $fn= "$dir$l" unless $l =~ m,^/,;
561 $mfn= "output file $fn (symlink target of $ofn)";
563 die "$quis: output file $mfn exists but is not a file".
564 " (or symlink to one)";
567 unlink "$fn.new" or $! == &ENOENT or
568 die "$quis: cannot clear out old .new version of $mfn:\n $!";
569 $h= new IO::File "$fn.new",'w',$maxmode
570 or die("$quis: create .new version of $mfn:\n $!");
572 "# generated by $quis, do not edit\n",
573 $output_contents{$ofn}
574 or die "$quis: write data to .new version of $mfn:\n $!";
576 or die "$quis: close .new version of $mfn:\n $!";
577 push @to_install, $fn,$mfn;
580 while (($fn,$mfn, @to_install) = @to_install) {
582 or die "$quis: install new version of $mfn:\n $!";
586 #-------------------- general utilities
590 return unless $debug>1;
591 local $Data::Dumper::Terse=1;
592 foreach $vn (split /\s+/, $_[0]) {
593 print "$vn := ", eval "Dumper(\\$vn)";
597 sub debug_trace ($) {
598 return unless $debug;
603 my ($domain,$type,$okrcodes) = @_;
605 debug_trace("lookup ==> (->$okrcodes) $domain $type");
608 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
610 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
612 die "$quis: exec adnshost:\n $!\n";
614 @result= $h->getlines();
615 $h->error and die "$quis: read from adnshost:\n $!\n";
618 die "$quis: lookup -t$type $domain $okrcodes failed $? $! @result\n"
619 if $! or $?>6 or index($okrcodes,$?)<0;
620 debug_trace("lookup <== $? @result");
626 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
627 # also pseudo-rr with type `flags:'
628 my ($h,$inmid,$irdata,$c);
631 debug_trace("dig ==> \@$qaddr $qowner $qtype");
634 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
636 open STDERR, ">&STDOUT" or die $!;
638 '+nodef','+nosea','+nodebug','+norecurse',
639 "\@$qaddr",'-t',$qtype,$qowner);
640 die "$quis: exec dig:\n $!\n";
644 if (!defined($_= $h->getline())) {
645 $h->error() and die "$quis: read from dig:\n $!\n";
650 s/^\s+/ / or die "$inmid // $_ ?";
654 s/$/ \(/ unless s/\s*\)\s*$//;
656 if (s/\s*\(\s*$//) { $inmid= $_; next; }
657 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
658 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
659 debug_trace("dig f: $dig_rdata");
663 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
664 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
665 if ($dig_type eq 'a') {
666 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
668 } elsif ($dig_type eq 'ns') {
669 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
670 $dig_rdata= domain_canon($irdata);
671 } elsif ($dig_type eq 'soa') {
672 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
673 or die "bad SOA $irdata ?";
674 $dig_rdata= domain_canon($1).' '.$2;
676 debug_trace("ignoring uknown RR type $dig_type");
679 debug_trace("dig $dig_owner $dig_type $dig_rdata");
682 debug_trace("ignoring unknown dig output $_");
686 debug_trace("dig <== gave $?");
689 sub domain_canon ($) {
692 die "domain $_ ?" unless m/^[0-9a-z]/i;