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,$3);
180 } elsif (m/^output\s+bind8\+(\S+)$/) {
181 cfg_fail("default output may not apply to only some zones")
182 if @zone_cfg_list && length $default_output;
183 set_output(qualify($1));
184 } elsif (m/^include\s+(\S+)$/) {
187 cfg_fail("unknown configuration directive".
188 " or incorrect syntax or arguments");
191 $fh->close or cfg_fail("close config file $if:\n $!");
196 $i= "$default_dir$i" unless $i =~ m,^/,;
200 sub zone_conf ($$$$$@) {
201 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
203 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
205 if (!length $output) {
206 $default_output= qualify('chiark-conf-gen.bind8')
207 unless length $default_output;
208 set_output($default_output);
210 cfg_fail("redefined zone $zone\n".
211 " earlier definition $zone_cfg{$zone}{'where'}")
212 if exists $zone_cfg{$zone};
213 $zone_cfg{$zone}{'where'}= $where;
214 $zone_cfg{$zone}{'file'}= $file;
215 $zone_cfg{$zone}{'style_p'}= $style.$mod;
216 $zone_cfg{$zone}{'s'}= $sabbr.$mod; # p)rimary s)econdary u)npub f)oreign
217 $zone_cfg{$zone}{'servers'}= [ @servers ];
218 foreach $sfx (qw(soa ns addr)) {
219 { no strict 'refs'; $aref= [ @{ "self_$sfx" } ]; }
220 @$aref or cfg_fail("failed to specify self-$sfx before zone");
221 $zone_cfg{$zone}{"self_$sfx"}= $aref;
223 $zone_cfg{$zone}{'output'}= $output;
224 push @zone_cfg_list, $zone;
230 $output_contents{$output}= '';
234 #-------------------- checking
236 use vars qw($zone $cfg $warnings);
240 return if !$verbosity;
245 return if $verbosity<2;
249 sub process_zones (@) {
253 foreach $zone (@zones) {
254 $cfg= $zone_cfg{$zone} || {
255 'style_p' => 'foreign',
259 progress(sprintf "%-40s %s", $zone, $$cfg{'style_p'});
260 if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) {
262 if ($localonly && $cfg->{'s'} =~ m/f/) {
263 zone_warning("foreign zone specified with -l");
264 } elsif ($cfg->{'s'} =~ m/\*/ ||
265 ($localonly && $cfg->{'s'} !~ m/p/)) {
271 zone_warning("checks failed: $@") if length $@;
273 $output_contents{$$cfg{'output'}} .= zone_output()
276 print STDERR "$quis: $warnings warnings\n" or die $!
280 sub zone_warning ($) {
284 print STDERR "$zone: warning: $w\n" or die $!;
288 sub zone_warnmore ($) {
289 print STDERR "$zone: $_[0]\n" or die $!;
292 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
293 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
294 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
295 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
296 use vars qw(%addr_is_ok %warned_glueless %warned_mynameaddr);
297 use vars qw($delg_to_us);
298 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
299 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
301 sub zone_check_full () {
309 %delgs= %auths= %glue= %soas=
310 %warned_glueless= %warned_mynameaddr=
313 @to_check= @to_check_soa= ();
316 sub zone_investigate() {
317 my ($super_zone, @super_nsnames,
318 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
319 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
323 debug_trace("zone $zone superzone $super_zone");
324 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
325 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
328 for $super_ns (@super_nsnames) {
329 $super_ns= lc $super_ns;
330 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
331 foreach $addr (@super_ns_addrs) {
334 "$super_ns, server for $super_zone",
339 # We do these in order so that we always do NS RRset checks on
340 # nameservers that came from other NS RRsets first; otherwise
341 # we might set nsrrset_checked due to a glueless_ok check,
342 # and then not check for gluefulness later.
343 debug_dump('@to_check @to_check_soa');
344 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
345 push @to_check_soa, $addr, $wa if $is_auth;
346 next if $nsrrset_checked{$addr}++;
347 zone_check_nsrrset($addr, "[$addr] $wa",
348 $is_auth, $glueless_ok);
349 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
350 next if $soa_checked{$addr}++;
351 zone_check_soa($addr,"[$addr] $wa","[$addr] NS");
358 sub zone_check_nsrrset ($$$$) {
359 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
360 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths, $wwn);
361 verbose("checking delegation by $ww");
363 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
364 $s2g{lc $dig_rdata} = [ ];
365 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
366 $wwn= "in glue from $ww";
367 push @to_check, $dig_rdata, "$dig_owner, $wwn", 1, 0;
368 zone_server_addr($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
369 push @{ $s2g{$dig_owner} }, $dig_rdata;
373 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
374 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
377 @glue= @{ $s2g{$s} };
379 zone_warning("glueless NS $s,".
380 ($needglue<=1 ? " (eg)" : "").
382 unless $glueless_ok || !$needglue ||
383 ($needglue<=1 && $warned_glueless{$s}++);
386 $glue= join ' ', sort @glue;
387 push @{ $glue{$s}{$glue} }, $ww;
390 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
391 push @{ $delgs_or_auths->{$s} }, $ww;
394 sub zone_server_addr ($$$$$) {
395 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
396 $addr_is_ok{$addr}= "$name ($wwq)"
397 if $is_soa || $cfg->{'s'} =~ m/u/;
398 zone_warning("configured as stealth but we [$addr]".
399 " are published ($name $wwq)")
400 if $cfg->{'s'} =~ m/u/ && grep { $_ eq $addr } @self_addr;
402 my ($name_is_self, $addr_is_self);
403 $name_is_self= grep { $_ eq $name }
404 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
405 $addr_is_self= grep { $_ eq $addr }
406 @{ $cfg->{'self_addr'} };
407 if ($name_is_self && !$addr_is_self) {
408 zone_warning("our name $name with wrong address [$addr], (eg) $ww")
409 unless $warned_mynameaddr{$name}{$addr}++;
410 } elsif (!$name_is_self && $addr_is_self) {
411 zone_warning(($is_soa ? "SOA ORIGIN maps to" : "allegedly served by").
412 " us [$addr] with wrong name $name, (eg) $ww")
413 unless $warned_mynameaddr{$name}{$addr}++;
415 $delg_to_us=1 if $name_is_self;
418 sub zone_check_soa ($$$) {
419 my ($uaddr,$ww,$wwq) = @_;
420 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr,$wwn);
421 verbose("checking service at $wwq");
422 $lame= 'dead or lame';
424 if ($dig_type eq 'flags:') {
425 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
426 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
427 die "several SOAs ? $ww" if defined $origin;
429 $got =~ m/^(\S+) \d+/ or die "$got ?";
434 $lame= 'broken' if !$lame && !defined $origin;
435 if ($lame) { zone_warning("$lame server $ww"); return; }
436 push @{ $soas{$got} }, $ww;
437 ($rcode,@soa_addrs)= lookup($origin,'a','0');
438 foreach $soa_addr (@soa_addrs) {
439 $wwn= "SOA ORIGIN from $ww";
440 zone_server_addr($soa_addr,$origin,$wwn,"SOA [$uaddr]",1);
441 push @to_check, $soa_addr, "$origin, $wwn";
445 sub zone_consistency() {
446 my ($d, $org_ser, $origin, $a, $h, $self_soa);
447 zone_consistency_set('delegations',\%delgs);
448 foreach $d (keys %delgs) { delete $auths{$d}; }
449 zone_consistency_set('zone nameserver rrset',\%auths);
450 foreach $h (keys %glue) {
451 zone_consistency_set("glue for $h", $glue{$h});
453 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
454 $self_soa= $cfg->{'self_soa'};
455 if ($cfg->{'s'} =~ m/p/) {
456 foreach $org_ser (keys %soas) {
457 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
459 next if grep { $_ eq $origin } @$self_soa;
460 zone_warning("SOA ORIGIN $origin is not our name (@$self_soa),".
461 " eg from ".($soas{$org_ser}[0]));
466 sub zone_servers_ok () {
470 foreach $a (@{ $cfg->{'servers'} }) {
471 next if exists $addr_is_ok{$a};
472 zone_warning("we slave from $a"); $showok=1;
475 foreach $a (keys %addr_is_ok) {
476 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
480 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
481 zone_warning("we are supposedly published secondary,".
482 " but not listed as a nameserver");
486 sub zone_consistency_set ($%) {
489 if (keys(%$set) > 1) {
490 zone_warning("inconsistent $msg:");
491 foreach $d (keys %$set) {
492 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
497 sub zone_check_local () {
499 zone_servers_simplefind();
503 sub zone_servers_simplefind () {
504 my ($rcode,@nsnames,$ns,@soas,$origin);
506 ($rcode,@nsnames)= lookup($zone,'ns-','0');
507 foreach $ns (@nsnames) { zone_server_simple($ns,'NS',0); }
509 ($rcode,@soas)= lookup($zone,'soa','0');
510 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
511 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
512 zone_server_simple(domain_canon($1),'SOA',1);
515 sub zone_server_simple ($$$) {
516 my ($name,$ww,$is_soa) = @_;
517 my ($rcode,@addrs,$addr);
518 ($rcode,@addrs)= lookup($name,'a','0');
519 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
522 #-------------------- outputting
527 $o= "zone \"$zone\" {\n";
528 if ($$cfg{'s'} =~ m/p/) {
529 $o.= " type master\n";
531 $o.= " type slave\n".
533 foreach $m (@{ $cfg{'servers'} }) { $o.= " $m;\n"; }
539 sub output_files () {
540 my ($fn,$ofn,$mfn,$l,$dir, $maxmode,$h,@to_install);
542 foreach $ofn (keys %output_contents) {
543 $fn= $ofn; $mfn= "output file $fn";
546 $! == &ENOENT or die "$quis: stat $mfn:\n $!\n";
550 $maxmode= (stat _)[2];
553 defined($l= readlink $fn)
554 or die "$quis: readlink $mfn:\n $!\n";
555 $dir= $fn =~ m,^.*/, ? $& : './';
556 $fn= "$dir$l" unless $l =~ m,^/,;
557 $mfn= "output file $fn (symlink target of $ofn)";
559 die "$quis: output file $mfn exists but is not a file".
560 " (or symlink to one)";
563 unlink "$fn.new" or $! == &ENOENT or
564 die "$quis: cannot clear out old .new version of $mfn:\n $!";
565 $h= new IO::File "$fn.new",'w',$maxmode
566 or die("$quis: create .new version of $mfn:\n $!");
568 "# generated by $quis, do not edit\n",
569 $output_contents{$ofn}
570 or die "$quis: write data to .new version of $mfn:\n $!";
572 or die "$quis: close .new version of $mfn:\n $!";
573 push @to_install, $fn,$mfn;
576 while (($fn,$mfn, @to_install) = @to_install) {
578 or die "$quis: install new version of $mfn:\n $!";
582 #-------------------- general utilities
586 return unless $debug>1;
587 local $Data::Dumper::Terse=1;
588 foreach $vn (split /\s+/, $_[0]) {
589 print "$vn := ", eval "Dumper(\\$vn)";
593 sub debug_trace ($) {
594 return unless $debug;
599 my ($domain,$type,$okrcodes) = @_;
601 debug_trace("lookup ==> (->$okrcodes) $domain $type");
604 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
606 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
608 die "$quis: exec adnshost:\n $!\n";
610 @result= $h->getlines();
611 $h->error and die "$quis: read from adnshost:\n $!\n";
614 die "$quis: lookup -t$type $domain $okrcodes failed $? $! @result\n"
615 if $! or $?>6 or index($okrcodes,$?)<0;
616 debug_trace("lookup <== $? @result");
622 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
623 # also pseudo-rr with type `flags:'
624 my ($h,$inmid,$irdata,$c);
627 debug_trace("dig ==> \@$qaddr $qowner $qtype");
630 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
632 open STDERR, ">&STDOUT" or die $!;
634 '+nodef','+nosea','+nodebug','+norecurse',
635 "\@$qaddr",'-t',$qtype,$qowner);
636 die "$quis: exec dig:\n $!\n";
640 if (!defined($_= $h->getline())) {
641 $h->error() and die "$quis: read from dig:\n $!\n";
646 s/^\s+/ / or die "$inmid // $_ ?";
650 s/$/ \(/ unless s/\s*\)\s*$//;
652 if (s/\s*\(\s*$//) { $inmid= $_; next; }
653 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
654 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
655 debug_trace("dig f: $dig_rdata");
659 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
660 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
661 if ($dig_type eq 'a') {
662 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
664 } elsif ($dig_type eq 'ns') {
665 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
666 $dig_rdata= domain_canon($irdata);
667 } elsif ($dig_type eq 'soa') {
668 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
669 or die "bad SOA $irdata ?";
670 $dig_rdata= domain_canon($1).' '.$2;
672 debug_trace("ignoring uknown RR type $dig_type");
675 debug_trace("dig $dig_owner $dig_type $dig_rdata");
678 debug_trace("ignoring unknown dig output $_");
682 debug_trace("dig <== gave $?");
685 sub domain_canon ($) {
688 die "domain $_ ?" unless m/^[0-9a-z]/i;