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;
71 usage: chiark-named-conf [options] -f|-y|-n|<zone>...
73 -f --force install without checking
74 -y --yes check and install
75 -n --no check only (configured zones)
76 <zone> ... check only (specified zones, even unconfigured ones)
78 -A --all report on zones marked ? (ones we know are broken)
79 -D debug $quis (does not help debug your DNS config)
80 -g --glueless do not warn about any glueless referrals (not recommended)
81 -l --localonly full checks only on zones which we primary
82 -q --quiet no output for OK zones
83 -r --repeat repeat warnings for all sources of imperfect data
84 -v --verbose extra verbose info about each zone
85 -C|--config <DIR/FILE use FILE as default config and DIR as default dir
87 chiark-named-conf is Copyright 2002 Ian Jackson. It is Free software, under
88 the GNU General Public License, and you are welcome to change it and/or
89 distribute copies under certain conditions. There is ABSOLUTELY NO WARRANTY.
93 cfg_fail("config filename $etcfile should not be directory")
96 use vars qw($default_dir);
97 $default_dir= $etcfile =~ m,^.*/, ? $& : './';
99 use vars qw($slave_dir $slave_prefix $slave_suffix);
104 use vars qw(@self_ns @self_soa @self_addr @forbid_addr @conv_glueless);
105 @self_ns= @self_soa= @self_addr= @forbid_addr= ();
106 @conv_glueless= qw(in-addr.arpa ip6.arpa ip6.int);
108 use vars qw(%zone_cfg @zone_cfg_list);
112 use vars qw($output $default_output %output_contents);
115 %output_contents= ();
117 use vars qw($check $install);
118 $check= $mode !~ m/^f/;
119 $install= $mode =~ m/^[yf]/;
121 read_config($etcfile);
122 debug_dump('@zone_cfg_list %zone_cfg');
123 process_zones($mode ? @zone_cfg_list : @ARGV);
124 debug_dump('%output_contents');
125 output_files() if $install;
129 #-------------------- configuration reading
131 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
133 sub read_config ($) {
135 my ($fh,$z,@self,$before,
136 $mod,$dir,$prefix,$suffix,$subfile,$lprefix,$lsuffix,$zf);
139 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
142 if (!defined($_= <$fh>)) {
143 cfg_fail("read config file $if:\n $!") if $fh->error();
147 if (s/\\$//) { $before.= $_; next; }
155 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
156 @self= split /\s+/, $2;
157 @self_ns= @self if $1 ne '-soa';
158 @self_soa= @self if $1 ne '-ns';
159 } elsif (m/^serverless\-glueless\s+(\S.*\S)/) {
160 @conv_glueless= split /\s+/, $1;
161 } elsif (m/^self\-addr\s+([0-9. \t]+)/) {
162 @self_addr= split /\s+/, $1;
163 } elsif (m/^forbid\-addr(?:\s+([0-9. \t]+))?/) {
164 @forbid_addr= defined $1 ? split /\s+/, $1 : ();
168 (?: \s+ ([^/ \t]*) (?: (/.+) )?
171 ($mod, $dir, $prefix, $suffix, $subfile) =
172 ($1,qualify($2),$3,$4,$5);
173 $suffix= '' if !defined $suffix;
174 $subfile= '' if !defined $subfile;
175 $suffix= '_db' if !length $suffix && !length $subfile;
176 if (-d "$dir/$prefix") { $dir.='/'; $dir.=$prefix; $prefix=''; }
177 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
178 $lprefix= length $prefix; $lsuffix= length $suffix;
179 while (defined($_= readdir D)) {
180 next if m/^\./ && !$lprefix;
181 next unless length > $lprefix+$lsuffix;
182 next unless substr($_,0,$lprefix) eq $prefix;
183 next unless substr($_,length($_)-$lsuffix) eq $suffix;
184 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
185 $zf= $dir.'/'.$prefix.$z.$suffix.$subfile;
187 next if length $subfile && $! == &ENOENT;
188 cfg_fail("cannot stat zonefile $zf:\n $!");
190 -f _ or cfg_fail("zonefile $zf is not a plain file");
191 zone_conf($z,'primary','p',$mod,$zf);
193 closedir D or cfg_fail("close primary-dir $dir:\n $!");
194 } elsif (m/^primary([*?]?)\s+(\S+)\s+(\S+)$/) {
195 zone_conf($2,'primary','p',$1,qualify($3));
196 } elsif (m/^published([*?]?)\s+(\S+)\s+([0-9.\t]+)$/) {
197 zone_conf($2,'published','s',$1,'',$3);
198 } elsif (m/^stealth([*?]?)\s+(\S+)\s+([0-9. \t]+)$/) {
199 zone_conf($2,'stealth','u',$1,'',split /\s+/, $3);
200 } elsif (m/^slave\-dir\s+(\S+)(?:(?:\s+(\S+))\s+(\S+))?$/) {
201 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
202 $slave_prefix='' if !defined $slave_prefix;
203 $slave_suffix='' if !defined $slave_suffix;
204 } elsif (m/^output\s+bind8\+(\S+)$/) {
205 cfg_fail("default output may not apply to only some zones")
206 if @zone_cfg_list && length $default_output;
207 set_output(qualify($1));
208 } elsif (m/^include\s+(\S+)$/) {
211 cfg_fail("unknown configuration directive".
212 " or incorrect syntax or arguments:\n".
216 $fh->close or cfg_fail("close config file $if:\n $!");
221 $i= "$default_dir$i" unless $i =~ m,^/,;
225 sub zone_conf ($$$$$@) {
226 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
228 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
230 if (!length $output) {
231 $default_output= qualify('chiark-conf-gen.bind8')
232 unless length $default_output;
233 set_output($default_output);
235 cfg_fail("redefined zone $zone\n".
236 " earlier definition $zone_cfg{$zone}{'where'}")
237 if exists $zone_cfg{$zone};
238 $zone_cfg{$zone}{'where'}= $where;
239 $zone_cfg{$zone}{'file'}= $file;
240 $zone_cfg{$zone}{'style_p'}= $style.$mod;
241 $zone_cfg{$zone}{'s'}= $sabbr.$mod; # p)rimary s)econdary u)npub f)oreign
242 $zone_cfg{$zone}{'servers'}= [ @servers ];
243 foreach $sfx (qw(self_soa self_ns self_addr forbid_addr conv_glueless)) {
244 { no strict 'refs'; $aref= [ @$sfx ]; }
245 @$aref or cfg_fail("failed to specify $sfx before zone")
247 $zone_cfg{$zone}{$sfx}= $aref;
249 $zone_cfg{$zone}{'output'}= $output;
250 push @zone_cfg_list, $zone;
256 $output_contents{$output}= '';
260 #-------------------- checking
262 use vars qw($zone $cfg $warnings %zone_warnings);
267 return if $verbosity < $minv;
271 sub verbose ($) { progress(3, ' ' . $_[0]); }
273 sub process_zones (@) {
277 foreach $zone (@zones) {
279 $cfg= $zone_cfg{$zone} || {
280 'style_p' => 'foreign',
284 progress(1, sprintf "%-20s %s", $zone, $$cfg{'style_p'});
285 if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) {
287 if ($localonly && $cfg->{'s'} =~ m/f/) {
288 zone_warning("foreign zone specified with -l",'');
289 } elsif ($localonly && $cfg->{'s'} !~ m/p/) {
295 zone_warning("checks failed: $@",'') if length $@;
297 $output_contents{$$cfg{'output'}} .= zone_output()
301 printf STDERR ("%s: %d warning(s) in %d zone(s);".
302 " %d zone(s) checked ok.\n",
305 scalar(keys %zone_warnings),
306 scalar(@zones - keys %zone_warnings));
308 progress(1, sprintf "%d zone(s) checked ok", scalar @zones);
312 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
313 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
314 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
315 use vars qw(%soas); # $soa{"$serial $origin"} = [ $whosaidandwhy ]
316 use vars qw(%addr_is_ok %warned);
317 use vars qw($delg_to_us);
318 use vars qw(@to_check); # ($addr,$whyask,$name_if_auth,$glueless_ok, ...)
319 use vars qw(@to_check_soa); # ($addr,$whyask,$name,$is_ns, ...)
321 sub zone_warning ($$) {
325 return 0 if !$repeat && $warned{$w}++;
330 $w .= " ($o)" if length $o;
331 print STDERR "$zone: warning: $w\n" or die $!;
333 $zone_warnings{$zone}++;
337 sub zone_warnmore ($) {
338 print STDERR "$zone: $_[0]\n" or die $!;
341 sub zone_check_full () {
348 %delgs= %auths= %glue= %soas= %warned= %addr_is_ok= ();
350 @to_check= @to_check_soa= ();
353 sub zone_investigate() {
354 my ($super_zone, @start_nsnames, $start_ww,
355 $start_ns, @start_ns_addrs, $s, $wa, $name_if_auth,
356 %nsrrset_checked, %soa_checked, $addr, $glueless_ok,
357 $rcode, $name, $is_ns);
359 if ($cfg->{'s'} !~ m/\*/) {
362 debug_trace("zone $zone superzone $super_zone");
363 $super_zone =~ s/^[^.]+\.//
364 or die "no superzone ? ($super_zone)\n";
365 ($rcode,@start_nsnames)=
366 lookup($super_zone,'ns-','06',"superzone search");
369 $start_ww= "server for $super_zone";
371 ($rcode,@start_nsnames)=
372 lookup($zone,'ns-','0',"initial nameserver search");
373 $start_ww= "nameserver for $zone";
375 for $start_ns (@start_nsnames) {
376 $start_ns= lc $start_ns;
377 ($rcode,@start_ns_addrs)= lookup($start_ns,'a','0',"$start_ww");
378 foreach $addr (@start_ns_addrs) {
379 push @to_check, $addr, "$start_ns, $start_ww", undef, 0;
383 # We do these in order so that we always do NS RRset checks on
384 # nameservers that came from other NS RRsets first; otherwise
385 # we might set nsrrset_checked due to a glueless_ok check,
386 # and then not check for gluefulness later.
387 debug_dump('@to_check @to_check_soa');
388 if (($addr,$wa,$name_if_auth,$glueless_ok,@to_check) = @to_check) {
389 push @to_check_soa, $addr, $wa, $name_if_auth, 1,
390 if defined $name_if_auth;
391 next if $nsrrset_checked{$addr}++;
392 zone_check_nsrrset($addr, $wa, $name_if_auth, $glueless_ok);
393 } elsif (($addr,$wa,$name,$is_ns,@to_check_soa) = @to_check_soa) {
394 next if $soa_checked{$addr}++;
395 zone_check_soa($addr,$wa,$name,$is_ns);
402 sub zone_check_nsrrset ($$$$) {
403 my ($uaddr,$wa, $name_if_auth, $glueless_ok) = @_;
404 my (@s, $s, $a, %s2g, @glue, $glue, $delgs_or_auths, $wwn, $ww);
407 verbose("checking delegation by $ww");
409 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
410 $s2g{lc $dig_rdata} = [ ];
411 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
412 $wwn= "in glue from $ww";
413 zone_server_queue($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
414 push @{ $s2g{$dig_owner} }, $dig_rdata;
419 zone_warning("unable to find NS RRset at [$uaddr]", $wa);
421 } elsif (keys %s2g == 1) {
422 zone_warning("only one nameserver ". (join '', keys %s2g),
427 zone_ns_name($s,$ww);
428 @glue= @{ $s2g{$s} };
430 zone_warning("glueless NS $s", $ww)
431 unless $glueless_ok || !$needglue ||
432 grep { has_suffix_of($s,".$_"); }
433 @{ $cfg->{'conv_glueless'} };
434 ($rcode,@glue)= lookup($s,'a','0',"glueless NS from $ww");
436 $wwn= "glueless NS from $ww";
437 zone_server_queue($a,$s,$wwn,"NS [$uaddr]",0);
440 $glue= join ' ', sort @glue;
441 push @{ $glue{$s}{$glue} }, $ww;
444 $delgs_or_auths= defined($name_if_auth) ? \%auths : \%delgs;
445 push @{ $delgs_or_auths->{$s} }, $ww;
448 sub zone_ns_name ($$) {
451 $delg_to_us=1 if grep { $name eq $_ } @{ $cfg->{'self_ns'} };
452 foreach $cg (@{ $cfg->{'conv_glueless'} }) {
453 zone_warning("nameserver $name in serverless-glueless".
454 " namespace area $cg",
456 if has_suffix_of(".$name",".$cg");
458 zone_warning("published server, as $name, but configured as stealth",
460 if $cfg->{'s'} =~ m/u/ &&
462 @{ $cfg->{'self_ns'} }, @{ $cfg->{'self_soa'} };
465 sub zone_server_queue ($$$$$) {
466 my ($addr,$name,$wwn,$wwq,$is_soa) = @_;
467 zone_server_addr($addr,$name,$wwn,$wwq,$is_soa);
468 push @to_check, $addr, "$name, $wwn", $name, $is_soa;
471 sub zone_server_addr ($$$$$) {
472 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
473 debug_trace("zone_server_addr ".join '|',@_);
474 $addr_is_ok{$addr}= "$name ($wwq)"
475 if $is_soa || $cfg->{'s'} =~ m/u/;
476 zone_warning("forbidden nameserver address [$addr] $name",$ww)
477 if grep { $_ eq $addr } @{ $cfg->{'forbid_addr'} };
479 my ($name_is_self, $addr_is_self);
480 $name_is_self= grep { $_ eq $name }
481 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
482 $addr_is_self= grep { $_ eq $addr }
483 @{ $cfg->{'self_addr'} };
484 if ($name_is_self && !$addr_is_self) {
485 zone_warning("our $name supplied with wrong address [$addr]", $ww);
487 if (!$name_is_self && $addr_is_self) {
488 zone_warning("we [$addr] are named in ".
489 ($is_soa ? "SOA" : "NS").
490 " by wrong name $name",
493 if (!$name_is_self && !$addr_is_self &&
494 $is_soa && $cfg->{'s'} =~ m/p/) {
495 zone_warning("SOA ORIGIN $name is not us (".
496 (join ' ', @{ $cfg->{'self_soa'} }).")", $ww);
498 $delg_to_us=1 if $addr_is_self && !$is_soa;
501 sub zone_check_soa ($$$$) {
502 my ($uaddr,$wa,$name,$is_ns) = @_;
503 my ($lame,$serial,$origin,$got,$rcode,@soa_addrs,$soa_addr,$ww,$wwn);
504 verbose("checking service at [$uaddr] $name");
505 $lame= 'dead or lame';
508 if ($dig_type eq 'flags:') {
509 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
510 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
511 die "several SOAs ? $ww" if defined $origin;
513 $got =~ m/^(\d+) (\S+)$/ or die "$got ?";
514 ($serial,$origin) = ($1,$2);
518 $lame= 'broken' if !$lame && !defined $origin;
519 if ($lame) { zone_warning("$lame server [$uaddr]",$wa); return; }
520 progress(2, sprintf "%-16s %46s has %s%s",
521 $zone, "$name [$uaddr]", $serial, $is_ns ? '' : '*');
522 push @{ $soas{$got} }, $ww;
523 ($rcode,@soa_addrs)= lookup($origin,'a','0',"SOA ORIGIN");
524 $wwn= "SOA ORIGIN from $ww";
525 foreach $soa_addr (@soa_addrs) {
526 zone_server_queue($soa_addr,$origin,$wwn,"SOA [$uaddr]",1);
530 sub zone_consistency() {
531 my ($d, $org_ser, $origin, $a, $h, $self_soa, $wa);
532 zone_consistency_set('delegations',\%delgs);
533 foreach $d (keys %delgs) { delete $auths{$d}; }
534 zone_consistency_set('zone nameserver rrset',\%auths);
535 foreach $h (keys %glue) {
536 zone_consistency_set("glue for $h", $glue{$h});
538 zone_consistency_set("serial number and/or SOA ORIGIN",\%soas);
539 $self_soa= $cfg->{'self_soa'};
542 sub zone_servers_ok () {
546 foreach $a (@{ $cfg->{'servers'} }) {
547 next if exists $addr_is_ok{$a};
548 zone_warning("we slave from [$a]",'')
552 foreach $a (keys %addr_is_ok) {
553 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
557 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
558 zone_warning("we are supposedly published secondary,".
559 " but not listed as a nameserver",'');
560 map { $fs{$_}=1 } keys(%delgs), keys(%auths);
561 zone_warnmore("servers are: ". join ' ', sort keys %fs);
565 sub zone_consistency_set ($%) {
568 if (keys(%$set) > 1) {
569 zone_warning("inconsistent $msg:",'');
570 foreach $d (keys %$set) {
571 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
576 sub zone_check_local () {
577 zone_servers_simplefind();
581 sub zone_servers_simplefind () {
582 my ($rcode,@nsnames,$ns,@soas,$origin);
584 ($rcode,@nsnames)= lookup($zone,'ns-','0',"zone's servers");
585 foreach $ns (@nsnames) {
586 zone_ns_name($ns,"NS");
587 zone_server_simple($ns,'NS',0);
589 $delgs{join ' ', sort @nsnames} = [ "zone's servers" ];
591 ($rcode,@soas)= lookup($zone,'soa','0',"SOA ORIGIN");
592 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
593 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
594 zone_server_simple(domain_canon($1,"lookup $zone SOA"),'SOA',1);
597 sub zone_server_simple ($$$) {
598 my ($name,$ww,$is_soa) = @_;
599 my ($rcode,@addrs,$addr);
600 ($rcode,@addrs)= lookup($name,'a','0', "server - ".
601 ($is_soa ? "SOA ORIGIN" : "NS"));
602 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
605 #-------------------- outputting
610 $o= "zone \"$zone\" {\n";
611 if ($$cfg{'s'} =~ m/p/) {
612 $o.= " type master;\n";
614 $o.= " type slave;\n".
616 foreach $m (@{ $$cfg{'servers'} }) { $o.= " $m;\n"; }
619 $o.= " file \"$$cfg{'file'}\";\n";
624 sub output_files () {
625 my ($fn,$ofn,$mfn,$l,$dir, $maxmode,$h,@to_install);
627 foreach $ofn (keys %output_contents) {
628 $fn= $ofn; $mfn= "output file $fn";
631 $! == &ENOENT or die "$quis: stat $mfn:\n $!\n";
635 $maxmode= (stat _)[2];
638 defined($l= readlink $fn)
639 or die "$quis: readlink $mfn:\n $!\n";
640 $dir= $fn =~ m,^.*/, ? $& : './';
641 $fn= "$dir$l" unless $l =~ m,^/,;
642 $mfn= "output file $fn (symlink target of $ofn)";
644 die "$quis: output file $mfn exists but is not a file".
645 " (or symlink to one)";
648 unlink "$fn.new" or $! == &ENOENT or
649 die "$quis: cannot clear out old .new version of $mfn:\n $!";
650 $h= new IO::File "$fn.new",'w',$maxmode
651 or die("$quis: create .new version of $mfn:\n $!");
653 "# generated by $quis, do not edit\n",
654 $output_contents{$ofn}
655 or die "$quis: write data to .new version of $mfn:\n $!";
657 or die "$quis: close .new version of $mfn:\n $!";
658 push @to_install, $fn,$mfn;
661 while (($fn,$mfn, @to_install) = @to_install) {
663 or die "$quis: install new version of $mfn:\n $!";
667 #-------------------- general utilities
671 return unless $debug>1;
672 local $Data::Dumper::Terse=1;
673 foreach $vn (split /\s+/, $_[0]) {
674 print "$vn := ", eval "Dumper(\\$vn)";
678 sub debug_trace ($) {
679 return unless $debug;
683 sub has_suffix_of ($$) {
684 my ($whole,$suffix) = @_;
685 debug_trace("has_suffix_of $whole $suffix");
686 return 0 if length $whole < length $suffix;
687 return 0 if substr($whole, length($whole) - length($suffix)) ne $suffix;
688 debug_trace("has_suffix_of $whole $suffix YES");
693 my ($domain,$type,$okrcodes,$w) = @_;
695 debug_trace("lookup ==> (->$okrcodes) $domain $type");
698 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
700 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
702 die "$quis: exec adnshost:\n $!\n";
704 @result= $h->getlines();
705 $h->error and die "$quis: read from adnshost:\n $!\n";
708 die "$quis: lookup -t$type $domain $okrcodes ($w) failed $? $! @result\n"
709 if $! or $?&255 or $?>1536 or index($okrcodes,$?>>8)<0;
710 debug_trace("lookup <== $? @result");
715 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
716 # also pseudo-rr with type `flags:'
717 my ($h,$inmid,$irdata,$c,$digwhy);
720 debug_trace("dig ==> \@$qaddr $qowner $qtype");
723 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
725 open STDERR, ">&STDOUT" or die $!;
727 '+nodef','+nosea','+nodebug','+norecurse',
728 "\@$qaddr",'-t',$qtype,$qowner);
729 die "$quis: exec dig:\n $!\n";
733 if (!defined($_= $h->getline())) {
734 $h->error() and die "$quis: read from dig:\n $!\n";
739 s/^\s+/ / or die "$inmid // $_ ?";
743 s/$/ \(/ unless s/\s*\)\s*$//;
745 if (s/\s*\(\s*$//) { $inmid= $_; next; }
746 $digwhy= "dig $qowner $qtype $qaddr \`$_'";
747 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
748 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
749 debug_trace("dig f: $dig_rdata");
753 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
754 $dig_owner=domain_canon($1,$digwhy); $dig_type=lc $2; $irdata=$3;
755 if ($dig_type eq 'a') {
756 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
758 } elsif ($dig_type eq 'ns') {
759 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
760 $dig_rdata= domain_canon($irdata,$digwhy);
761 } elsif ($dig_type eq 'soa') {
762 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
763 or die "bad SOA $irdata ?";
764 $dig_rdata= $2.' '.domain_canon($1,$digwhy);
766 debug_trace("ignoring uknown RR type $dig_type");
769 debug_trace("dig $dig_owner $dig_type $dig_rdata");
772 debug_trace("ignoring unknown dig output $_");
776 debug_trace("dig <== gave $?");
779 sub domain_canon ($$) {
782 return '.' if $i eq '.';
783 die "domain $i ($w) ?" unless $i =~ m/^[0-9a-z]/i;