11 $debug $needglue $localonly $repeat $verbosity);
13 $quis= $0; $quis =~ s,.*/,,;
17 $etcfile= "/etc/bind/chiark-conf-gen.zones";
25 use vars qw($dig_owner $dig_type $dig_rdata);
27 while (@ARGV && $ARGV[0] =~ m/^\-/) {
31 if (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
32 elsif (m/^all$/) { $doall=1; }
33 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
34 elsif (m/^glueless$/) { $needglue=0; }
35 elsif (m/^localonly$/) { $localonly=1; }
36 elsif (m/^quiet$/) { $verbosity--; }
37 elsif (m/^repeat$/) { $repeat=1; }
38 elsif (m/^verbose$/) { $verbosity++; }
39 else { usageerr("unknown option --$_"); }
44 if (s/^[ynf]//) { $mode=$&; }
45 elsif (s/^A//) { $doall=1; }
46 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
47 elsif (s/^D//) { $debug++; }
48 elsif (s/^g//) { $needglue=0; }
49 elsif (s/^l//) { $localonly=1; }
50 elsif (s/^q//) { $verbosity--; }
51 elsif (s/^r//) { $repeat=1; }
52 elsif (s/^v//) { $verbosity++; }
53 else { usageerr("unknown option -$&"); }
58 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
59 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
61 usageerr("-q may be specified at most twice") if $verbosity<0;
62 usageerr("-v may be specified at most once") if $verbosity>3;
63 usageerr("-D may be specified at most twice") if $debug>2;
64 usageerr("must specify either -f|-y|-n or zones (and not both)")
65 if !!$mode == !!@ARGV;
70 usage: named-conf-regen [options] -f|-y|-n|<zone>...\n".
72 " -f --force install without checking\n".
73 " -y --yes check and install\n".
74 " -n --no check only\n".
75 "additional options:\n".
76 " -A --all report on zones marked ? (ones we know are broken)\n".
77 " -D debug $quis (does not help debug your DNS config)\n".
78 " -g --glueless do not warn about any glueless referrals (not recommended)\n".
79 " -l --localonly full checks only on zones which we primary\n".
80 " -q --quiet no output for OK zones\n".
81 " -r --repeat repeat warnings for all sources of imperfect data\n".
82 " -v --verbose extra verbose info about each zone\n".
83 " -C|--config <DIR/FILE use FILE as default config and DIR as default dir\n";
86 cfg_fail("config filename $etcfile should not be directory")
89 use vars qw($default_dir);
90 $default_dir= $etcfile =~ m,^.*/, ? $& : './';
92 use vars qw($slave_dir $slave_prefix $slave_suffix);
97 use vars qw(@self_ns @self_soa @self_addr @forbid_addr @conv_glueless);
98 @self_ns= @self_soa= @self_addr= @forbid_addr= ();
99 @conv_glueless= qw(in-addr.arpa ip6.arpa ip6.int);
101 use vars qw(%zone_cfg @zone_cfg_list);
105 use vars qw($output $default_output %output_contents);
108 %output_contents= ();
110 use vars qw($check $install);
111 $check= $mode !~ m/^f/;
112 $install= $mode =~ m/^[yf]/;
114 read_config($etcfile);
115 debug_dump('@zone_cfg_list %zone_cfg');
116 process_zones($mode ? @zone_cfg_list : @ARGV);
117 debug_dump('%output_contents');
118 output_files() if $install;
122 #-------------------- configuration reading
124 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
126 sub read_config ($) {
128 my ($fh,$z,@self,$before,
129 $mod,$dir,$prefix,$suffix,$subfile,$lprefix,$lsuffix,$zf);
132 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
135 if (!defined($_= <$fh>)) {
136 cfg_fail("read config file $if:\n $!") if $fh->error();
140 if (s/\\$//) { $before.= $_; next; }
148 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
149 @self= split /\s+/, $2;
150 @self_ns= @self if $1 ne '-soa';
151 @self_soa= @self if $1 ne '-ns';
152 } elsif (m/^serverless\-glueless\s+(\S.*\S)/) {
153 @conv_glueless= split /\s+/, $1;
154 } elsif (m/^self\-addr\s+([0-9. \t]+)/) {
155 @self_addr= split /\s+/, $1;
156 } elsif (m/^forbid\-addr(?:\s+([0-9. \t]+))?/) {
157 @forbid_addr= defined $1 ? split /\s+/, $1 : ();
161 (?: \s+ ([^/ \t]*) (?: (/.+) )?
164 ($mod, $dir, $prefix, $suffix, $subfile) =
165 ($1,qualify($2),$3,$4,$5);
166 $suffix= '' if !defined $suffix;
167 $subfile= '' if !defined $subfile;
168 $suffix= '_db' if !length $suffix && !length $subfile;
169 if (-d "$dir/$prefix") { $dir.='/'; $dir.=$prefix; $prefix=''; }
170 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
171 $lprefix= length $prefix; $lsuffix= length $suffix;
172 while (defined($_= readdir D)) {
173 next if m/^\./ && !$lprefix;
174 next unless length > $lprefix+$lsuffix;
175 next unless substr($_,0,$lprefix) eq $prefix;
176 next unless substr($_,length($_)-$lsuffix) eq $suffix;
177 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
178 $zf= $dir.'/'.$prefix.$z.$suffix.$subfile;
180 next if length $subfile && $! == &ENOENT;
181 cfg_fail("cannot stat zonefile $zf:\n $!");
183 -f _ or cfg_fail("zonefile $zf is not a plain file");
184 zone_conf($z,'primary','p',$mod,$zf);
186 closedir D or cfg_fail("close primary-dir $dir:\n $!");
187 } elsif (m/^primary([*?]?)\s+(\S+)\s+(\S+)$/) {
188 zone_conf($2,'primary','p',$1,qualify($3));
189 } elsif (m/^published([*?]?)\s+(\S+)\s+([0-9.\t]+)$/) {
190 zone_conf($2,'published','s',$1,'',$3);
191 } elsif (m/^stealth([*?]?)\s+(\S+)\s+([0-9. \t]+)$/) {
192 zone_conf($2,'stealth','u',$1,'',split /\s+/, $3);
193 } elsif (m/^slave\-dir\s+(\S+)(?:(?:\s+(\S+))\s+(\S+))?$/) {
194 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
195 $slave_prefix='' if !defined $slave_prefix;
196 $slave_suffix='' if !defined $slave_suffix;
197 } elsif (m/^output\s+bind8\+(\S+)$/) {
198 cfg_fail("default output may not apply to only some zones")
199 if @zone_cfg_list && length $default_output;
200 set_output(qualify($1));
201 } elsif (m/^include\s+(\S+)$/) {
204 cfg_fail("unknown configuration directive".
205 " or incorrect syntax or arguments:\n".
209 $fh->close or cfg_fail("close config file $if:\n $!");
214 $i= "$default_dir$i" unless $i =~ m,^/,;
218 sub zone_conf ($$$$$@) {
219 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
221 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
223 if (!length $output) {
224 $default_output= qualify('chiark-conf-gen.bind8')
225 unless length $default_output;
226 set_output($default_output);
228 cfg_fail("redefined zone $zone\n".
229 " earlier definition $zone_cfg{$zone}{'where'}")
230 if exists $zone_cfg{$zone};
231 $zone_cfg{$zone}{'where'}= $where;
232 $zone_cfg{$zone}{'file'}= $file;
233 $zone_cfg{$zone}{'style_p'}= $style.$mod;
234 $zone_cfg{$zone}{'s'}= $sabbr.$mod; # p)rimary s)econdary u)npub f)oreign
235 $zone_cfg{$zone}{'servers'}= [ @servers ];
236 foreach $sfx (qw(self_soa self_ns self_addr forbid_addr conv_glueless)) {
237 { no strict 'refs'; $aref= [ @$sfx ]; }
238 @$aref or cfg_fail("failed to specify $sfx before zone")
240 $zone_cfg{$zone}{$sfx}= $aref;
242 $zone_cfg{$zone}{'output'}= $output;
243 push @zone_cfg_list, $zone;
249 $output_contents{$output}= '';
253 #-------------------- checking
255 use vars qw($zone $cfg $warnings %zone_warnings);
260 return if $verbosity < $minv;
264 sub verbose ($) { progress(3, ' ' . $_[0]); }
266 sub process_zones (@) {
270 foreach $zone (@zones) {
272 $cfg= $zone_cfg{$zone} || {
273 'style_p' => 'foreign',
277 progress(1, sprintf "%-20s %s", $zone, $$cfg{'style_p'});
278 if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) {
280 if ($localonly && $cfg->{'s'} =~ m/f/) {
281 zone_warning("foreign zone specified with -l",'');
282 } elsif ($cfg->{'s'} =~ m/\*/ ||
283 ($localonly && $cfg->{'s'} !~ m/p/)) {
289 zone_warning("checks failed: $@",'') if length $@;
291 $output_contents{$$cfg{'output'}} .= zone_output()
295 printf STDERR ("%s: %d warning(s) in %d zone(s);".
296 " %d zone(s) checked ok.\n",
299 scalar(keys %zone_warnings),
300 scalar(@zones - keys %zone_warnings));
302 progress(1, sprintf "%d zone(s) checked ok", scalar @zones);
306 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
307 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
308 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
309 use vars qw(%soas); # $soa{"$serial $origin"} = [ $whosaidandwhy ]
310 use vars qw(%addr_is_ok %warned);
311 use vars qw($delg_to_us);
312 use vars qw(@to_check); # ($addr,$whyask,$name_if_auth,$glueless_ok, ...)
313 use vars qw(@to_check_soa); # ($addr,$whyask,$name,$is_ns, ...)
315 sub zone_warning ($$) {
319 return 0 if !$repeat && $warned{$w}++;
324 $w .= " ($o)" if length $o;
325 print STDERR "$zone: warning: $w\n" or die $!;
327 $zone_warnings{$zone}++;
331 sub zone_warnmore ($) {
332 print STDERR "$zone: $_[0]\n" or die $!;
335 sub zone_check_full () {
342 %delgs= %auths= %glue= %soas= %warned= %addr_is_ok= ();
344 @to_check= @to_check_soa= ();
347 sub zone_investigate() {
348 my ($super_zone, @super_nsnames,
349 $super_ns, @super_ns_addrs, $s, $wa, $name_if_auth,
350 %nsrrset_checked, %soa_checked, $addr, $glueless_ok,
351 $rcode, $name, $is_ns);
355 debug_trace("zone $zone superzone $super_zone");
356 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
357 ($rcode,@super_nsnames)=
358 lookup($super_zone,'ns-','06',"superzone search");
361 for $super_ns (@super_nsnames) {
362 $super_ns= lc $super_ns;
363 ($rcode,@super_ns_addrs)=
364 lookup($super_ns,'a','0',"published nameserver");
365 foreach $addr (@super_ns_addrs) {
368 "$super_ns, server for $super_zone",
373 # We do these in order so that we always do NS RRset checks on
374 # nameservers that came from other NS RRsets first; otherwise
375 # we might set nsrrset_checked due to a glueless_ok check,
376 # and then not check for gluefulness later.
377 debug_dump('@to_check @to_check_soa');
378 if (($addr,$wa,$name_if_auth,$glueless_ok,@to_check) = @to_check) {
379 push @to_check_soa, $addr, $wa, $name_if_auth, 1,
380 if defined $name_if_auth;
381 next if $nsrrset_checked{$addr}++;
382 zone_check_nsrrset($addr, $wa, $name_if_auth, $glueless_ok);
383 } elsif (($addr,$wa,$name,$is_ns,@to_check_soa) = @to_check_soa) {
384 next if $soa_checked{$addr}++;
385 zone_check_soa($addr,$wa,$name,$is_ns);
392 sub zone_check_nsrrset ($$$$) {
393 my ($uaddr,$wa, $name_if_auth, $glueless_ok) = @_;
394 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths, $wwn, $ww);
397 verbose("checking delegation by $ww");
399 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
400 $s2g{lc $dig_rdata} = [ ];
401 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
402 $wwn= "in glue from $ww";
403 push @to_check, $dig_rdata, "$dig_owner, $wwn", $dig_owner, 0;
404 zone_server_addr($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
405 push @{ $s2g{$dig_owner} }, $dig_rdata;
410 zone_warning("unable to find NS RRset at [$uaddr]", $wa);
412 } elsif (keys %s2g == 1) {
413 zone_warning("only one nameserver ". (join '', keys %s2g),
418 zone_ns_name($s,$ww);
419 @glue= @{ $s2g{$s} };
421 zone_warning("glueless NS $s", $ww)
422 unless $glueless_ok || !$needglue ||
423 grep { has_suffix_of($s,".$_"); }
424 @{ $cfg->{'conv_glueless'} };
425 ($rcode,@glue)= lookup($s,'a','0',"glueless NS from $ww");
427 $glue= join ' ', sort @glue;
428 push @{ $glue{$s}{$glue} }, $ww;
431 $delgs_or_auths= defined($name_if_auth) ? \%auths : \%delgs;
432 push @{ $delgs_or_auths->{$s} }, $ww;
435 sub zone_ns_name ($$) {
438 $delg_to_us=1 if grep { $name eq $_ } @{ $cfg->{'self_ns'} };
439 foreach $cg (@{ $cfg->{'conv_glueless'} }) {
440 zone_warning("nameserver $name in serverless-glueless".
441 " namespace area $cg",
443 if has_suffix_of(".$name",".$cg");
445 zone_warning("published server, as $name, but configured as stealth",
447 if $cfg->{'s'} =~ m/u/ &&
449 @{ $cfg->{'self_ns'} }, @{ $cfg->{'self_soa'} };
452 sub zone_server_addr ($$$$$) {
453 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
454 debug_trace("zone_server_addr ".join '|',@_);
455 $addr_is_ok{$addr}= "$name ($wwq)"
456 if $is_soa || $cfg->{'s'} =~ m/u/;
457 zone_warning("forbidden nameserver address [$addr] $name",$ww)
458 if grep { $_ eq $addr } @{ $cfg->{'forbid_addr'} };
460 my ($name_is_self, $addr_is_self);
461 $name_is_self= grep { $_ eq $name }
462 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
463 $addr_is_self= grep { $_ eq $addr }
464 @{ $cfg->{'self_addr'} };
465 if ($name_is_self && !$addr_is_self) {
466 zone_warning("our $name supplied with wrong address [$addr]", $ww);
468 if (!$name_is_self && $addr_is_self) {
469 zone_warning("we [$addr] are named in ".
470 ($is_soa ? "SOA" : "NS").
471 " by wrong name $name",
474 if (!$name_is_self && !$addr_is_self &&
475 $is_soa && $cfg->{'s'} =~ m/p/) {
476 zone_warning("SOA ORIGIN $name is not us (".
477 (join ' ', @{ $cfg->{'self_soa'} }).")", $ww);
479 $delg_to_us=1 if $addr_is_self && !$is_soa;
482 sub zone_check_soa ($$$$) {
483 my ($uaddr,$wa,$name,$is_ns) = @_;
484 my ($lame,$serial,$origin,$got,$rcode,@soa_addrs,$soa_addr,$ww,$wwn);
485 verbose("checking service at [$uaddr] $name");
486 $lame= 'dead or lame';
489 if ($dig_type eq 'flags:') {
490 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
491 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
492 die "several SOAs ? $ww" if defined $origin;
494 $got =~ m/^(\d+) (\S+)$/ or die "$got ?";
495 ($serial,$origin) = ($1,$2);
499 $lame= 'broken' if !$lame && !defined $origin;
500 if ($lame) { zone_warning("$lame server [$uaddr]",$wa); return; }
501 progress(2, sprintf "%-22s %40s has %s%s",
502 $zone, $name, $serial, $is_ns ? '' : '*');
503 push @{ $soas{$got} }, $ww;
504 ($rcode,@soa_addrs)= lookup($origin,'a','0',"SOA ORIGIN");
505 $wwn= "SOA ORIGIN from $ww";
506 foreach $soa_addr (@soa_addrs) {
507 zone_server_addr($soa_addr,$origin,$wwn,"SOA [$uaddr]",1);
508 push @to_check, $soa_addr, "$origin, $wwn", $origin, 1;
512 sub zone_consistency() {
513 my ($d, $org_ser, $origin, $a, $h, $self_soa, $wa);
514 zone_consistency_set('delegations',\%delgs);
515 foreach $d (keys %delgs) { delete $auths{$d}; }
516 zone_consistency_set('zone nameserver rrset',\%auths);
517 foreach $h (keys %glue) {
518 zone_consistency_set("glue for $h", $glue{$h});
520 zone_consistency_set("serial number and/or SOA ORIGIN",\%soas);
521 $self_soa= $cfg->{'self_soa'};
524 sub zone_servers_ok () {
528 foreach $a (@{ $cfg->{'servers'} }) {
529 next if exists $addr_is_ok{$a};
530 zone_warning("we slave from [$a]",'')
534 foreach $a (keys %addr_is_ok) {
535 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
539 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
540 zone_warning("we are supposedly published secondary,".
541 " but not listed as a nameserver",'');
542 map { $fs{$_}=1 } keys(%delgs), keys(%auths);
543 zone_warnmore("servers are: ". join ' ', sort keys %fs);
547 sub zone_consistency_set ($%) {
550 if (keys(%$set) > 1) {
551 zone_warning("inconsistent $msg:",'');
552 foreach $d (keys %$set) {
553 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
558 sub zone_check_local () {
559 zone_servers_simplefind();
563 sub zone_servers_simplefind () {
564 my ($rcode,@nsnames,$ns,@soas,$origin);
566 ($rcode,@nsnames)= lookup($zone,'ns-','0',"zone's servers");
567 foreach $ns (@nsnames) {
568 zone_ns_name($ns,"NS");
569 zone_server_simple($ns,'NS',0);
572 ($rcode,@soas)= lookup($zone,'soa','0',"SOA ORIGIN");
573 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
574 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
575 zone_server_simple(domain_canon($1,"lookup $zone SOA"),'SOA',1);
578 sub zone_server_simple ($$$) {
579 my ($name,$ww,$is_soa) = @_;
580 my ($rcode,@addrs,$addr);
581 ($rcode,@addrs)= lookup($name,'a','0', "server - ".
582 ($is_soa ? "SOA ORIGIN" : "NS"));
583 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
586 #-------------------- outputting
591 $o= "zone \"$zone\" {\n";
592 if ($$cfg{'s'} =~ m/p/) {
593 $o.= " type master;\n";
595 $o.= " type slave;\n".
597 foreach $m (@{ $$cfg{'servers'} }) { $o.= " $m;\n"; }
600 $o.= " file \"$$cfg{'file'}\";\n";
605 sub output_files () {
606 my ($fn,$ofn,$mfn,$l,$dir, $maxmode,$h,@to_install);
608 foreach $ofn (keys %output_contents) {
609 $fn= $ofn; $mfn= "output file $fn";
612 $! == &ENOENT or die "$quis: stat $mfn:\n $!\n";
616 $maxmode= (stat _)[2];
619 defined($l= readlink $fn)
620 or die "$quis: readlink $mfn:\n $!\n";
621 $dir= $fn =~ m,^.*/, ? $& : './';
622 $fn= "$dir$l" unless $l =~ m,^/,;
623 $mfn= "output file $fn (symlink target of $ofn)";
625 die "$quis: output file $mfn exists but is not a file".
626 " (or symlink to one)";
629 unlink "$fn.new" or $! == &ENOENT or
630 die "$quis: cannot clear out old .new version of $mfn:\n $!";
631 $h= new IO::File "$fn.new",'w',$maxmode
632 or die("$quis: create .new version of $mfn:\n $!");
634 "# generated by $quis, do not edit\n",
635 $output_contents{$ofn}
636 or die "$quis: write data to .new version of $mfn:\n $!";
638 or die "$quis: close .new version of $mfn:\n $!";
639 push @to_install, $fn,$mfn;
642 while (($fn,$mfn, @to_install) = @to_install) {
644 or die "$quis: install new version of $mfn:\n $!";
648 #-------------------- general utilities
652 return unless $debug>1;
653 local $Data::Dumper::Terse=1;
654 foreach $vn (split /\s+/, $_[0]) {
655 print "$vn := ", eval "Dumper(\\$vn)";
659 sub debug_trace ($) {
660 return unless $debug;
664 sub has_suffix_of ($$) {
665 my ($whole,$suffix) = @_;
666 debug_trace("has_suffix_of $whole $suffix");
667 return 0 if length $whole < length $suffix;
668 return 0 if substr($whole, length($whole) - length($suffix)) ne $suffix;
669 debug_trace("has_suffix_of $whole $suffix YES");
674 my ($domain,$type,$okrcodes,$w) = @_;
676 debug_trace("lookup ==> (->$okrcodes) $domain $type");
679 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
681 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
683 die "$quis: exec adnshost:\n $!\n";
685 @result= $h->getlines();
686 $h->error and die "$quis: read from adnshost:\n $!\n";
689 die "$quis: lookup -t$type $domain $okrcodes ($w) failed $? $! @result\n"
690 if $! or $?&255 or $?>1536 or index($okrcodes,$?>>8)<0;
691 debug_trace("lookup <== $? @result");
696 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
697 # also pseudo-rr with type `flags:'
698 my ($h,$inmid,$irdata,$c,$digwhy);
701 debug_trace("dig ==> \@$qaddr $qowner $qtype");
704 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
706 open STDERR, ">&STDOUT" or die $!;
708 '+nodef','+nosea','+nodebug','+norecurse',
709 "\@$qaddr",'-t',$qtype,$qowner);
710 die "$quis: exec dig:\n $!\n";
714 if (!defined($_= $h->getline())) {
715 $h->error() and die "$quis: read from dig:\n $!\n";
720 s/^\s+/ / or die "$inmid // $_ ?";
724 s/$/ \(/ unless s/\s*\)\s*$//;
726 if (s/\s*\(\s*$//) { $inmid= $_; next; }
727 $digwhy= "dig $qowner $qtype $qaddr \`$_'";
728 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
729 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
730 debug_trace("dig f: $dig_rdata");
734 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
735 $dig_owner=domain_canon($1,$digwhy); $dig_type=lc $2; $irdata=$3;
736 if ($dig_type eq 'a') {
737 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
739 } elsif ($dig_type eq 'ns') {
740 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
741 $dig_rdata= domain_canon($irdata,$digwhy);
742 } elsif ($dig_type eq 'soa') {
743 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
744 or die "bad SOA $irdata ?";
745 $dig_rdata= $2.' '.domain_canon($1,$digwhy);
747 debug_trace("ignoring uknown RR type $dig_type");
750 debug_trace("dig $dig_owner $dig_type $dig_rdata");
753 debug_trace("ignoring unknown dig output $_");
757 debug_trace("dig <== gave $?");
760 sub domain_canon ($$) {
763 return '.' if $i eq '.';
764 die "domain $i ($w) ?" unless $i =~ m/^[0-9a-z]/i;