2 # This is chiark-named-conf, which is Copyright 2002 Ian Jackson.
4 # chiark-named-conf and its manpage are free software; you can
5 # redistribute it and/or modify them under the terms of the GNU
6 # General Public License as published by the Free Software Foundation;
7 # either version 3, or (at your option) any later version.
9 # chiark-named-conf and its manpage are distributed in the hope that
10 # it will be useful, but WITHOUT ANY WARRANTY; without even the
11 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12 # PURPOSE. See the GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License along
15 # with this program; if not, consult the Free Software Foundation's
16 # website at www.fsf.org, or the GNU Project website at www.gnu.org.
22 use Fcntl qw(:DEFAULT :flock);
24 # bastard Perl wants me to do this now !
31 sub bad_modifiers ($);
32 sub zone_conf ($$$$$@);
36 sub process_zones (@);
37 sub zone_warning ($$);
38 sub zone_warnmore ($);
39 sub zone_check_full ();
41 sub zone_investigate();
42 sub zone_check_nsrrset ($$$$);
43 sub zone_ns_name ($$);
44 sub zone_server_queue ($$$$$);
45 sub zone_server_addr ($$$$$);
46 sub zone_check_soa ($$$$);
47 sub zone_consistency();
48 sub zone_servers_ok ();
49 sub zone_consistency_set ($%);
50 sub zone_check_local ();
51 sub zone_servers_simplefind ();
52 sub zone_server_simple ($$$);
54 sub mail_zone_before ();
55 sub mail_zone_after ();
58 sub mail_zone_mail ();
63 sub has_suffix_of ($$);
66 sub domain_canon ($$);
68 use vars qw($quis $stdout_fh $stderr_fh
71 $debug $needglue $localonly $repeat $verbosity
72 $admin $mail_state_dir $mail_max_warnfreq
73 $progress_fh $warn_fh $modifiers
74 %group2modcmd %group2used);
77 $quis= $0; $quis =~ s,.*/,,;
81 $etcfile= "/etc/bind/chiark-conf-gen.zones";
87 $admin=''; $mail_state_dir=''; $mail_max_warnfreq= 50;
91 $group2modcmd{'foreign'}= '$!*@?';
92 $group2used{'foreign'}= 1;
94 ($progress_fh= $stdout_fh= new_from_fd IO::Handle(1,'w') and
95 $warn_fh= $stderr_fh = new_from_fd IO::Handle(2,'w'))
96 or die "$quis: setup standard filehandles: $!\n";
98 use vars qw($dig_owner $dig_type $dig_rdata);
100 while (@ARGV && $ARGV[0] =~ m/^\-/) {
104 if (m/^(yes|no|force)$/) { m/^./; $mode= $&; $domail=''; }
105 elsif (m/^nothing$/) { $mode= 'x'; $domail=''; }
106 elsif (m/^mail\-(first|middle|final|final\-test)$/) {
110 elsif (m/^all$/) { $doall=1; }
111 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
112 elsif (m/^glueless$/) { $needglue=0; }
113 elsif (m/^localonly$/) { $localonly=1; }
114 elsif (m/^quiet$/) { $verbosity--; }
115 elsif (m/^repeat$/) { $repeat=1; }
116 elsif (m/^verbose$/) { $verbosity++; }
117 else { usageerr("unknown option --$_"); }
122 if (s/^[ynf]//) { $mode=$&; $domail=''; }
123 elsif (s/^A//) { $doall=1; }
124 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
125 elsif (s/^D//) { $debug++; }
126 elsif (s/^g//) { $needglue=0; }
127 elsif (s/^l//) { $localonly=1; }
128 elsif (s/^m(\w+)(\W+)$//) {
129 my ($g,$m) = ($1,$2);
130 $group2modcmd{$g}=$m;
131 usageerr("modifiers $m for group $g: $@") if bad_modifiers($m);
133 elsif (s/^q//) { $verbosity--; }
134 elsif (s/^r//) { $repeat=1; }
135 elsif (s/^v//) { $verbosity++; }
136 else { usageerr("unknown option -$&"); }
141 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
142 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
144 usageerr("-q may be specified at most twice") if $verbosity<0;
145 usageerr("-v may be specified at most once") if $verbosity>3;
146 usageerr("-D may be specified at most twice") if $debug>2;
147 usageerr("must specify either -f|-y|-n or zones (and not both)")
148 if !!$mode == !!@ARGV && !$domail;
154 usage: chiark-named-conf [options] -f|-y|-n|<zone>...
156 -f --force install without checking
157 -y --yes check and install
158 -n --no check only (configured zones)
159 --nothing list zones only
160 --mail-* send mail about broken zones (see manpage)
161 <zone> ... check only (specified zones, even unconfigured ones)
163 -A --all report on zones marked ? (ones we know are broken)
164 -D debug $quis (does not help debug your DNS config)
165 -g --glueless do not warn about any glueless referrals (not recommended)
166 -l --localonly full checks only on zones which we primary
167 -q --quiet no output for OK zones
168 -r --repeat repeat warnings for all sources of imperfect data
169 -v --verbose extra verbose info about each zone
170 -C|--config <DIR/FILE use FILE as default config and DIR as default dir
172 chiark-named-conf is Copyright 2002 Ian Jackson. It is Free software, under
173 the GNU General Public License, and you are welcome to change it and/or
174 distribute copies under certain conditions. There is ABSOLUTELY NO WARRANTY.
178 cfg_fail("config filename $etcfile should not be directory")
179 if $etcfile =~ m,/$,;
181 use vars qw($default_dir);
182 $default_dir= $etcfile =~ m,^.*/, ? $& : './';
184 use vars qw($slave_dir $slave_prefix $slave_suffix);
189 use vars qw(@self_ns @self_soa @self_addr @forbid_addr @forbid_slave
190 @conv_glueless @indirect_glue);
191 @self_ns= @self_soa= @self_addr= @forbid_addr= @forbid_slave= @indirect_glue= ();
192 @conv_glueless= qw(in-addr.arpa ip6.arpa ip6.int);
194 use vars qw(%zone_cfg @zone_cfg_list);
198 use vars qw($output $default_output %output_contents);
201 %output_contents= ();
203 use vars qw($check $install);
204 $check= $mode !~ m/^[fx]/;
205 $install= $mode =~ m/^[yf]/;
207 read_config($etcfile);
208 debug_dump('@zone_cfg_list %zone_cfg');
209 process_zones(!@ARGV ? @zone_cfg_list : @ARGV);
210 debug_dump('%output_contents');
211 output_files() if $install;
213 $stdout_fh->close or die "$quis: write messages to stdout: $!\n";
214 $stderr_fh->close or die "$quis: write messages to stderr: $!\n";
217 #-------------------- configuration reading
219 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
221 sub read_config ($) {
223 my ($fh,$z,@self,$before,$group,
224 $mod,$dir,$prefix,$suffix,$subfile,$lprefix,$lsuffix,$zf);
227 $fh= new IO::File $if,'r';
229 return if $! == &ENOENT;
230 cfg_fail("open $if:\n $!");
234 if (!defined($_= <$fh>)) {
235 cfg_fail("read config file $if:\n $!") if $fh->error();
239 if (s/\\$//) { $before.= $_; next; }
247 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
248 @self= split /\s+/, $2;
249 @self_ns= @self if $1 ne '-soa';
250 @self_soa= @self if $1 ne '-ns';
251 } elsif (m/^serverless\-glueless\s+(\S.*\S)/) {
252 @conv_glueless= split /\s+/, $1;
253 } elsif (m/^allow\-indirect\-glue\s+(\S.*\S)/) {
254 @indirect_glue= split /\s+/, $1;
255 } elsif (m/^self\-addr\s+([0-9. \t]+)/) {
256 @self_addr= split /\s+/, $1;
257 } elsif (m/^forbid\-addr(?:\s+([0-9. \t]+))?/) {
258 @forbid_addr= defined $1 ? split /\s+/, $1 : ();
259 } elsif (m/^forbid\-slave(?:\s+([0-9. \t]+))?/) {
260 @forbid_slave= defined $1 ? split /\s+/, $1 : ();
264 (?: \s+ ([^/ \t]*) (?: (/.+) )?
267 ($mod, $dir, $prefix, $suffix, $subfile) =
268 ($1,qualify($2),$3,$4,$5);
269 cfg_fail("modifiers $mod for directory $dir: $@")
270 if bad_modifiers($mod);
271 $suffix= '' if !defined $suffix;
272 $subfile= '' if !defined $subfile;
273 $suffix= '_db' if !length $suffix && !length $subfile;
274 if (-d "$dir/$prefix") { $dir.='/'; $dir.=$prefix; $prefix=''; }
275 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
276 $lprefix= length $prefix; $lsuffix= length $suffix;
277 while (defined($_= readdir D)) {
278 next if m/^\./ && !$lprefix;
279 next unless length > $lprefix+$lsuffix;
280 next unless substr($_,0,$lprefix) eq $prefix;
281 next unless substr($_,length($_)-$lsuffix) eq $suffix;
282 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
283 $zf= $dir.'/'.$prefix.$z.$suffix.$subfile;
285 next if length $subfile && $! == &ENOENT;
286 cfg_fail("cannot stat zonefile $zf:\n $!");
288 -f _ or cfg_fail("zonefile $zf is not a plain file");
289 zone_conf($z,'primary','p',$mod,$zf);
291 closedir D or cfg_fail("close primary-dir $dir:\n $!");
292 } elsif (m/^primary(\W*)\s+(\S+)\s+(\S+)$/) {
293 zone_conf($2,'primary','p',$1,qualify($3));
294 } elsif (m/^published(\W*)\s+(\S+)\s+([0-9.\t]+)$/) {
295 zone_conf($2,'published','s',$1,'',$3);
296 } elsif (m/^stealth(\W*)\s+(\S+)\s+([0-9. \t]+)$/) {
297 zone_conf($2,'stealth','u',$1,'',split /\s+/, $3);
298 } elsif (m/^modifiers\s+(\W+)(?:\s+(\w+))$/) {
299 ($mod,$group) = ($1,$2);
300 cfg_fail("modifiers $mod for group $group: $@")
301 if bad_modifiers($mod);
302 if (exists $group2modcmd{$group}) {
303 $mod= $group2modcmd{$group};
304 $group2used{$group}++;
307 } elsif (m/^slave\-dir\s+(\S+)(?:(?:\s+(\S+))\s+(\S+))?$/) {
308 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
309 $slave_prefix='' if !defined $slave_prefix;
310 $slave_suffix='' if !defined $slave_suffix;
311 } elsif (m/^output\s+bind8\+(\S+)$/) {
312 cfg_fail("default output may not apply to only some zones")
313 if @zone_cfg_list && length $default_output;
314 set_output(qualify($1));
315 } elsif (m/^include\s+(\S+)$/) {
317 } elsif (m/^admin\s+(\S+)$/) {
319 } elsif (m/^mail\-state\-dir\s+(\S+)$/) {
321 } elsif (m/^mail\-max\-warnfreq\s+(\d{1,3}(?:\.\d{0,5})?)$/) {
322 cfg_fail("mail-max-warnfreq must be <=100") if $1>100;
323 $mail_max_warnfreq= $1;
325 cfg_fail("unknown configuration directive".
326 " or incorrect syntax or arguments:\n".
330 foreach $group (keys %group2modcmd) {
331 next if exists $group2used{$group};
332 cfg_fail("command line specifies modifier group $group".
333 " but missing in configuration file");
335 $fh->close or cfg_fail("close config file $if:\n $!");
340 $i= "$default_dir$i" unless $i =~ m,^/,;
344 sub bad_modifiers ($) {
347 die "bad modifier $&" if m/[^!*\$\@~?]/;
348 die "repeated modifier $1" if m/(.).*\1/;
357 sub zone_conf_settings ($$) {
358 my ($cfg,$zone) = @_;
360 foreach $sfx (qw(self_soa self_ns self_addr forbid_addr forbid_slave
361 conv_glueless indirect_glue)) {
362 { no strict 'refs'; $aref= [ @$sfx ]; }
363 @$aref or cfg_fail("failed to specify $sfx before zone")
367 foreach $sfx (qw(self_soa self_ns)) {
368 map { s/\*$/$zone/ } @{ $zone_cfg{$zone}{$sfx} };
372 sub zone_conf ($$$$$@) {
373 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
374 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
376 if (!length $output) {
377 $default_output= qualify('chiark-conf-gen.bind8')
378 unless length $default_output;
379 set_output($default_output);
381 cfg_fail("redefined zone $zone\n".
382 " earlier definition $zone_cfg{$zone}{'where'}")
383 if exists $zone_cfg{$zone};
384 $zone_cfg{$zone}{'where'}= $where;
385 $zone_cfg{$zone}{'file'}= $file;
386 $zone_cfg{$zone}{'style_p'}= $style.$mod;
387 $zone_cfg{$zone}{'s'}= "$sabbr $mod $modifiers";
388 # p)rimary s)econdary u)npub f)oreign
389 # followed by modifiers, first per-zone, then default
390 $zone_cfg{$zone}{'servers'}= [ @servers ];
392 length $admin && length $mail_state_dir or
393 cfg_fail("mailing but failed to specify admin".
394 " or mail-state-dir before zone");
395 $zone_cfg{$zone}{'admin'}= $admin;
396 $zone_cfg{$zone}{'maildir'}= qualify($mail_state_dir);
397 $zone_cfg{$zone}{'mailmwarn'}= $mail_max_warnfreq;
399 zone_conf_settings($zone_cfg{$zone}, $zone);
400 $zone_cfg{$zone}{'output'}= $output;
401 push @zone_cfg_list, $zone;
407 $output_contents{$output}= '';
410 #-------------------- checking
412 use vars qw($zone $cfg $warnings %zone_warnings);
417 return if $verbosity < $minv;
418 print $progress_fh "$m\n" or die "$quis: $zone: write log: $!\n";
421 sub verbose ($) { progress(3, ' ' . $_[0]); }
423 sub process_zones (@) {
427 foreach $zone (@zones) {
428 $cfg= $zone_cfg{$zone} || {
429 'style_p' => 'foreign',
430 's' => "f $group2modcmd{'foreign'}",
433 zone_conf_settings($cfg, $zone);
435 mail_zone_before() or next
438 progress(1, sprintf "%-20s %s", $zone, $$cfg{'style_p'});
439 if ($check && ($doall || !zone_style('?',0))) {
441 if ($localonly && $cfg->{'s'} =~ m/f/) {
442 zone_warning("foreign zone specified with -l",'');
443 } elsif ($localonly && $cfg->{'s'} !~ m/p/) {
449 zone_warning("checks failed: $@",'') if length $@;
451 $output_contents{$$cfg{'output'}} .= zone_output()
454 mail_zone_after() if $domail;
457 } elsif ($warnings) {
458 printf STDERR ("%s: %d warning(s) in %d zone(s);".
459 " %d zone(s) checked ok.\n",
462 scalar(keys %zone_warnings),
463 scalar(@zones - keys %zone_warnings));
465 progress(1, sprintf "%d zone(s) checked ok", scalar @zones);
469 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
470 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
471 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
472 use vars qw(%soas); # $soa{"$serial $mname"} = [ $whosaidandwhy ]
473 use vars qw(%addr_is_ok %warned);
474 use vars qw($delg_to_us);
475 use vars qw(@to_check); # ($addr,$whyask,$name_if_auth,$glueless_ok, ...)
476 use vars qw(@to_check_soa); # ($addr,$whyask,$name,$is_ns, ...)
478 sub zone_warning ($$) {
482 return 0 if !$repeat && $warned{$w}++;
487 $w .= " ($o)" if length $o;
488 print $warn_fh "$zone: warning: $w\n" or die $!;
490 $zone_warnings{$zone}++;
494 sub zone_warnmore ($) {
495 print $warn_fh "$zone: $_[0]\n" or die $!;
498 sub zone_check_full () {
505 %delgs= %auths= %glue= %soas= %warned= %addr_is_ok= ();
507 @to_check= @to_check_soa= ();
510 sub zone_investigate() {
511 my ($super_zone, @start_nsnames, $start_ww,
512 $start_ns, @start_ns_addrs, $s, $wa, $name_if_auth,
513 %nsrrset_checked, %soa_checked, $addr, $glueless_ok,
514 $rcode, $name, $is_ns);
516 if (!zone_style('*',0)) {
519 debug_trace("zone $zone superzone $super_zone");
521 and die "no superzone ? ($super_zone)\n";
522 $super_zone =~ s/^[^.]+\.//
524 ($rcode,@start_nsnames)=
525 lookup($super_zone,'ns-','06',"superzone search");
528 $start_ww= "server for $super_zone";
530 ($rcode,@start_nsnames)=
531 lookup($zone,'ns-','0',"initial nameserver search");
532 $start_ww= "nameserver for $zone";
534 for $start_ns (@start_nsnames) {
535 $start_ns= lc $start_ns;
536 ($rcode,@start_ns_addrs)= lookup($start_ns,'a','0',"$start_ww");
537 foreach $addr (@start_ns_addrs) {
538 push @to_check, $addr, "$start_ns, $start_ww", undef, 0;
542 # We do these in order so that we always do NS RRset checks on
543 # nameservers that came from other NS RRsets first; otherwise
544 # we might set nsrrset_checked due to a glueless_ok check,
545 # and then not check for gluefulness later.
546 debug_dump('@to_check @to_check_soa');
547 if (($addr,$wa,$name_if_auth,$glueless_ok,@to_check) = @to_check) {
548 push @to_check_soa, $addr, $wa, $name_if_auth, 1,
549 if defined $name_if_auth;
550 next if $nsrrset_checked{$addr}++;
551 zone_check_nsrrset($addr, $wa, $name_if_auth, $glueless_ok);
552 } elsif (($addr,$wa,$name,$is_ns,@to_check_soa) = @to_check_soa) {
553 next if $soa_checked{$addr}++;
554 zone_check_soa($addr,$wa,$name,$is_ns);
561 sub zone_check_nsrrset ($$$$) {
562 my ($uaddr,$wa, $name_if_auth, $glueless_ok) = @_;
563 my (@s, $s, $a, %s2g, @glue, $glue, $delgs_or_auths, $wwn, $ww, $cg);
566 verbose("checking delegation by $ww");
568 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
569 $s2g{lc $dig_rdata} = [ ];
570 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
571 $wwn= "in glue from $ww";
572 zone_server_queue($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
573 push @{ $s2g{$dig_owner} }, $dig_rdata;
578 zone_warning("unable to find NS RRset at [$uaddr]", $wa);
580 } elsif (keys %s2g == 1) {
581 zone_warning("only one nameserver ". (join '', keys %s2g),
586 zone_ns_name($s,$ww);
587 @glue= @{ $s2g{$s} };
589 zone_warning("glueless NS $s", $ww)
591 or zone_style('~',!$needglue)
592 or grep { has_suffix_of($zone,".$_"); }
593 @{ $cfg->{'conv_glueless'} }
594 or ((grep { has_suffix_of($s,".$_"); }
595 @{ $cfg->{'indirect_glue'} }) and
596 !(grep { has_suffix_of($zone,".$_"); }
597 @{ $cfg->{'indirect_glue'} }));
598 foreach $cg (@{ $cfg->{'conv_glueless'} }) {
599 zone_warning("nameserver $s (glueless) in".
600 " serverless-glueless namespace area $cg", $ww)
601 if has_suffix_of(".$s",".$cg");
603 ($rcode,@glue)= lookup($s,'a','0',"glueless NS from $ww");
605 $wwn= "glueless NS from $ww";
606 zone_server_queue($a,$s,$wwn,"NS [$uaddr]",0);
609 $glue= join ' ', sort @glue;
610 push @{ $glue{$s}{$glue} }, $ww;
613 $delgs_or_auths= defined($name_if_auth) ? \%auths : \%delgs;
614 push @{ $delgs_or_auths->{$s} }, $ww;
617 sub zone_ns_name ($$) {
619 $delg_to_us=1 if grep { $name eq $_ } @{ $cfg->{'self_ns'} };
620 zone_warning("published server, as $name, but configured as stealth",
622 if $cfg->{'s'} =~ m/u/ &&
624 @{ $cfg->{'self_ns'} }, @{ $cfg->{'self_soa'} };
627 sub zone_server_queue ($$$$$) {
628 my ($addr,$name,$wwn,$wwq,$is_soa) = @_;
629 zone_server_addr($addr,$name,$wwn,$wwq,$is_soa);
630 push @to_check, $addr, "$name, $wwn", $name, $is_soa;
633 sub zone_server_addr ($$$$$) {
634 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
635 debug_trace("zone_server_addr ".join('|',@_));
636 $addr_is_ok{$addr}= "$name ($wwq)"
637 if $is_soa || $cfg->{'s'} =~ m/u/;
638 zone_warning("forbidden nameserver address [$addr] $name",$ww)
639 if grep { $_ eq $addr } @{ $cfg->{'forbid_addr'} };
640 zone_warning("forbidden server address for our slave [$addr] $name",$ww)
641 if $cfg->{'s'} =~ m/p/ and
642 grep { $_ eq $addr } @{ $cfg->{'forbid_slave'} };
644 my ($name_is_self, $addr_is_self);
645 $name_is_self= grep { $_ eq $name }
646 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
647 $addr_is_self= grep { $_ eq $addr }
648 @{ $cfg->{'self_addr'} };
649 if ($name_is_self && !$addr_is_self) {
650 zone_warning("our $name supplied with wrong address [$addr]", $ww);
652 if (!$name_is_self && $addr_is_self) {
653 zone_warning("we [$addr] are named in ".
654 ($is_soa ? "SOA" : "NS").
655 " by wrong name $name",
658 if (!$name_is_self && !$addr_is_self &&
659 $is_soa && $cfg->{'s'} =~ m/p/) {
660 zone_warning("SOA MNAME $name is not us (".
661 (join ' ', @{ $cfg->{'self_soa'} }).")", $ww);
663 $delg_to_us=1 if $addr_is_self && !$is_soa;
666 sub zone_check_soa ($$$$) {
667 my ($uaddr,$wa,$name,$is_ns) = @_;
668 my ($lame,$serial,$mname,$got,$rcode,@soa_addrs,$soa_addr,$ww,$wwn);
669 verbose("checking service at [$uaddr] $name");
670 $lame= 'dead or lame';
673 if ($dig_type eq 'flags:') {
674 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
675 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
676 die "several SOAs ? $ww" if defined $mname;
678 $got =~ m/^(\d+) (\S+)$/ or die "$got ?";
679 ($serial,$mname) = ($1,$2);
683 $lame= 'broken' if !$lame && !defined $mname;
684 if ($lame) { zone_warning("$lame server [$uaddr]",$wa); return; }
685 progress(2, sprintf "%-16s %46s has %s%s",
686 $zone, "$name [$uaddr]", $serial, $is_ns ? '' : '*');
687 push @{ $soas{$got} }, $ww;
688 ($rcode,@soa_addrs)= lookup($mname,'a','0',"SOA MNAME");
689 $wwn= "SOA MNAME from $ww";
690 foreach $soa_addr (@soa_addrs) {
691 zone_server_queue($soa_addr,$mname,$wwn,"SOA [$uaddr]",1);
695 sub zone_consistency() {
696 my ($d, $org_ser, $mname, $a, $h, $self_soa, $wa);
697 zone_consistency_set('delegations',\%delgs);
698 foreach $d (keys %delgs) { delete $auths{$d}; }
699 zone_consistency_set('zone nameserver rrset',\%auths);
700 foreach $h (keys %glue) {
701 zone_consistency_set("glue for $h", $glue{$h});
703 zone_consistency_set("serial number and/or SOA MNAME",\%soas);
704 $self_soa= $cfg->{'self_soa'};
707 sub zone_servers_ok () {
711 foreach $a (@{ $cfg->{'servers'} }) {
712 next if exists $addr_is_ok{$a};
713 zone_warning("we slave from [$a]",'')
717 foreach $a (keys %addr_is_ok) {
718 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
722 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
723 zone_warning("we are supposedly published secondary,".
724 " but not listed as a nameserver",'');
725 map { $fs{$_}=1 } keys(%delgs), keys(%auths);
726 zone_warnmore("servers are: ". join ' ', sort keys %fs);
730 sub zone_consistency_set ($%) {
733 if (keys(%$set) > 1) {
734 zone_warning("inconsistent $msg:",'');
735 foreach $d (keys %$set) {
736 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
741 sub zone_check_local () {
742 zone_servers_simplefind();
746 sub zone_servers_simplefind () {
747 my ($rcode,@nsnames,$ns,@soas,$mname);
749 ($rcode,@nsnames)= lookup($zone,'ns-','0',"zone's servers");
750 foreach $ns (@nsnames) {
751 zone_ns_name($ns,"NS");
752 zone_server_simple($ns,'NS',0);
754 $delgs{join ' ', sort @nsnames} = [ "zone's servers" ];
756 ($rcode,@soas)= lookup($zone,'soa','0',"SOA MNAME");
757 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
758 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
759 zone_server_simple(domain_canon($1,"lookup $zone SOA"),'SOA',1);
762 sub zone_server_simple ($$$) {
763 my ($name,$ww,$is_soa) = @_;
764 my ($rcode,@addrs,$addr);
765 ($rcode,@addrs)= lookup($name,'a','0', "server - ".
766 ($is_soa ? "SOA MNAME" : "NS"));
767 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
770 sub zone_style ($$) {
771 my ($stylechar, $default) = @_;
772 local ($_) = $$cfg{'s'};
773 $stylechar =~ s/\W/\\$&/ or die;
774 return m/(\S*)$stylechar/ ? $1 !~ m/\!/ : $default;
777 #-------------------- mailing
779 use vars qw($m_base $m_lastok @m_ok @m_fail
780 $m_info $m_time $m_lock $m_m);
782 sub mail_zone_before () {
785 $m_base= $$cfg{'maildir'}.'/'.$zone;
791 $m_lock= new IO::File "${m_base}_lock", O_RDWR|O_CREAT, 0600
792 or die "$quis: create lockfile ${m_base}_lock: $!\n";
793 if (!flock($m_lock, LOCK_EX|LOCK_NB)) {
794 <$m_lock> =~ m/^\d+ /;
795 die "$quis: $zone: concurrrency? - flock $&$!\n";
799 (@s1= $m_lock->stat) or die "$quis: fstat ${m_base}_lock: $!\n";
800 (@s2= stat "${m_base}_lock") or
801 die "$quis: stat ${m_base}_lock: $!\n";
802 last if ($s1[0] eq $s2[0] && $s1[1] eq $s2[1]);
805 (print $m_lock "$$ \n" and $m_lock->flush)
806 or die "$quis: write pid to ${m_base}_lock: $!\n";
808 if ($m_info= new IO::File "${m_base}_info", 'r') {
810 $_ =~ m/\n/ or die "$quis: read ${m_base}_info: $!\n";
811 m/^\d+ (\d+|-) ([0-9:]*) ([0-9:]*) / or
812 die "$quis: ${m_base}_info malformed\n";
814 if ($domail ne 'first') {
815 if ($2 eq ':' && $3 eq ':') {
816 warn "$quis: $zone: mid/last run, but last".
817 "run already done, ignoring zone\n";
820 @m_ok= split /\:/, $2;
821 @m_fail= split /\:/, $3;
823 } elsif ($! != &ENOENT) {
824 die "$quis: open ${m_base}_info: $!\n";
825 } elsif ($domail ne 'first') {
826 warn "$quis: $zone: first run, but not --mail-first,".
830 if ($domail eq 'first') {
831 remove "${m_base}_history" or $!==&ENOENT
832 or die "$quis: remove ${m_base}_history: $!\n";
834 $progress_fh= $warn_fh= new IO::File "${m_base}_history",'a',0666
835 or die "$quis: open ${m_base}_history: $!\n";
836 $m_info= new IO::File "${m_base}_info.tmp",'w',0666
837 or die "$quis: open ${m_base}_info.tmp: $!\n";
840 progress(-1, "\n".('-'x70)."\n".ptime($m_time)."\n");
844 sub mail_zone_after () {
845 if ($zone_warnings{$zone}) {
846 push @m_fail, $m_time;
847 progress(-1,"failed - $zone_warnings{$zone} warnings");
851 progress(-1,"everything is fine");
853 close $progress_fh or die "$quis: close ${m_base}_history: $!\n";
854 $progress_fh= $warn_fh= $stderr_fh;
856 if ($domail =~ m/^final/) {
857 if (100*@m_fail <= $$cfg{'mailmwarn'}*(@m_fail + @m_ok)) {
858 printf " %-40s ok\n", $zone or die "$quis: mail ok report: $!\n";
859 } elsif (zone_style('@',0)) {
860 printf " %-40s mail suppressed\n", $zone
861 or die "$quis: mail suppress report: $!\n";
866 printf " %-40s %d warns. OK %s Fail %s\n",
868 defined $zone_warnings{$zone} ? $zone_warnings{$zone} : 0,
869 join(',', map { $_ - $m_time } @m_ok),
870 join(',', map { $_ - $m_time } @m_fail)
871 or die "$quis: checking progress report: $!\n";
874 @m_fail= @m_ok= ('','')
875 if $domail =~ m/^final/;
877 printf $m_info "%s %s %s %s \n",
878 $m_time, $m_lastok, join(':',@m_ok), join(':',@m_fail)
879 or die "$quis: write new ${m_base}_info: $!\n";
880 $m_info->close or die "$quis: close new ${m_base}_info: $!\n";
881 rename "${m_base}_info.tmp", "${m_base}_info"
882 or die "$quis: install new ${m_base}_info: $!\n";
889 or die "$quis: write ${m_base}_mail: $!\n";
893 return gmtime($time)." GMT ($time)";
896 sub mail_zone_mail () {
897 my ($log, $zone_to, $zterr, $c, $r, $t, @soas);
898 $m_m= new IO::File "${m_base}_mail", 'w', 0666
899 or die "$quis: create ${m_base}_mail: $!\n";
900 $zone_to=''; $zterr='';
901 if (!zone_style("\$", $$cfg{'s'} !~ m/[ps]/)) {
903 ($r,@soas)= lookup($zone,'soa','0','problem-addr');
904 @soas==1 or die "multiple soas\n";
905 $soas[0] =~ m/^\S+ (\S.*\@\S+) [0-9 ]+$/ or
906 die "bad soa \`$_'\n";
913 From: zone checker <$$cfg{'admin'}>
914 Subject: $zone - configuration problems report
918 pmail("(testing!) ") if $domail ne 'final';
919 pmail("SOA MNAME for $zone <$zone_to>\nCC: ") if length($zone_to);
920 pmail($$cfg{'admin'}."\n\n");
922 You are receiving this mail because your email address is listed
923 in the SOA (Start Of Authority) record for $zone
924 in the DNS, which means you are supposedly the DNS administrator
925 responsible for this zone. This report is generated automatically
926 on behalf of $$cfg{'admin'}, who
927 is the administrator for a server for the zone. Please contact
928 them if you have any problem with this report.
933 Sent to $$cfg{'admin'} since SOA MNAME unavailable:
939 The zone has had configuration errors or persistent operational
940 problems during recent checks. See the logs below for details.
942 Recent check history for $zone:
945 if ($m_lastok ne '-') {
946 pmail(" Last seen to be fine: ".ptime($m_lastok)."\n");
948 pmail(" No record of this zone ever being fine.\n");
951 pmail(" Zone had problems at: ".ptime($t)."\n");
954 pmail(" Everything in order at: ".ptime($t)."\n");
957 $log= new IO::File "${m_base}_history",'r'
958 or die "$quis: reopen ${m_base}_history: $!";
960 pmail($log->getline);
962 (!$log->error and $log->close)
963 or die "$quis: reread or close ${m_base}_log: $!\n";
965 $m_m->close or die "$quis: close ${m_base}_mail: $!\n";
966 $m_m= new IO::File "${m_base}_mail"
967 or die "$quis: reopen ${m_base}_mail: $!";
969 defined($c= fork) or die "$quis: fork for mail: $!\n";
971 defined dup2($m_m->fileno, 0)
972 or die "$quis - sendmail: dup for stdin: $!\n";
973 exec (qw(/usr/sbin/sendmail -odb -oee -oi),
974 ($domail eq 'final' ? '-t' : $$cfg{'admin'}));
975 die "$quis - sendmail: exec: $!\n";
978 $!=0; $r= waitpid $c,0;
979 $r == $c or die "$quis: waitpid sendmail ($c): $r $!";
980 $? and warn "$quis: sendmail failed: $?\n";
982 printf " %-40s %s\n", $zone,
983 length $zone_to ? $zone_to : 'reporting to admin'
984 or die "$quis: write mailing report: $!\n";
987 #-------------------- outputting
992 $o= "zone \"$zone\" {\n";
993 if ($$cfg{'s'} =~ m/p/) {
994 $o.= " type master;\n";
996 $o.= " type slave;\n".
998 foreach $m (@{ $$cfg{'servers'} }) { $o.= " $m;\n"; }
1001 $o.= " file \"$$cfg{'file'}\";\n";
1006 sub output_files () {
1007 my ($fn,$ofn,$mfn,$l,$dir, $maxmode,$h,@to_install);
1009 foreach $ofn (keys %output_contents) {
1010 $fn= $ofn; $mfn= "output file $fn";
1013 $! == &ENOENT or die "$quis: stat $mfn:\n $!\n";
1017 $maxmode= (stat _)[2];
1020 defined($l= readlink $fn)
1021 or die "$quis: readlink $mfn:\n $!\n";
1022 $dir= $fn =~ m,^.*/, ? $& : './';
1023 $fn= "$dir$l" unless $l =~ m,^/,;
1024 $mfn= "output file $fn (symlink target of $ofn)";
1026 die "$quis: output file $mfn exists but is not a file".
1027 " (or symlink to one)";
1030 unlink "$fn.new" or $! == &ENOENT or
1031 die "$quis: cannot clear out old .new version of $mfn:\n $!";
1032 $h= new IO::File "$fn.new",'w',$maxmode
1033 or die("$quis: create .new version of $mfn:\n $!");
1035 "# generated by $quis, do not edit\n",
1036 $output_contents{$ofn}
1037 or die "$quis: write data to .new version of $mfn:\n $!";
1039 or die "$quis: close .new version of $mfn:\n $!";
1040 push @to_install, $fn,$mfn;
1043 while (($fn,$mfn, @to_install) = @to_install) {
1044 rename "$fn.new",$fn
1045 or die "$quis: install new version of $mfn:\n $!";
1049 #-------------------- general utilities
1051 sub debug_dump ($) {
1053 return unless $debug>1;
1054 local $Data::Dumper::Terse=1;
1055 foreach $vn (split /\s+/, $_[0]) {
1056 print "$vn := ", eval "Dumper(\\$vn)";
1060 sub debug_trace ($) {
1061 return unless $debug;
1065 sub has_suffix_of ($$) {
1066 my ($whole,$suffix) = @_;
1067 debug_trace("has_suffix_of $whole $suffix");
1068 return 0 if length $whole < length $suffix;
1069 return 0 if substr($whole, length($whole) - length($suffix)) ne $suffix;
1070 debug_trace("has_suffix_of $whole $suffix YES");
1075 my ($domain,$type,$okrcodes,$w) = @_;
1077 debug_trace("lookup ==> (->$okrcodes) $domain $type");
1080 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
1082 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
1084 die "$quis: exec adnshost:\n $!\n";
1086 @result= $h->getlines();
1087 $h->error and die "$quis: read from adnshost:\n $!\n";
1090 die "$quis: lookup -t$type $domain $okrcodes ($w) failed $? $! @result\n"
1091 if $! or $?&255 or $?>1536 or index($okrcodes,$?>>8)<0;
1092 debug_trace("lookup <== $? @result");
1093 return ($?,@result);
1097 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
1098 # also pseudo-rr with type `flags:'
1099 my ($h,$inmid,$irdata,$c,$digwhy);
1102 debug_trace("dig ==> \@$qaddr $qowner $qtype");
1105 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
1107 open STDERR, ">&STDOUT" or die $!;
1109 '+nodef','+nosea','+nodebug','+norecurse',
1110 "\@$qaddr",'-t',$qtype,$qowner);
1111 die "$quis: exec dig:\n $!\n";
1115 if (!defined($_= $h->getline())) {
1116 $h->error() and die "$quis: read from dig:\n $!\n";
1120 if (length $inmid) {
1121 s/^\s+/ / or die "$inmid // $_ ?";
1125 s/$/ \(/ unless s/\s*\)\s*$//;
1127 if (s/\s*\(\s*$//) { $inmid= $_; next; }
1128 $digwhy= "dig $qowner $qtype $qaddr \`$_'";
1129 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
1130 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
1131 debug_trace("dig f: $dig_rdata");
1135 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
1136 $dig_owner=domain_canon($1,$digwhy); $dig_type=lc $2; $irdata=$3;
1137 if ($dig_type eq 'a') {
1138 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
1140 } elsif ($dig_type eq 'ns') {
1141 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
1142 $dig_rdata= domain_canon($irdata,$digwhy);
1143 } elsif ($dig_type eq 'soa') {
1144 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
1145 or die "bad SOA $irdata ?";
1146 $dig_rdata= $2.' '.domain_canon($1,$digwhy);
1148 debug_trace("ignoring uknown RR type $dig_type");
1151 debug_trace("dig $dig_owner $dig_type $dig_rdata");
1154 debug_trace("ignoring unknown dig output $_");
1158 debug_trace("dig <== gave $?");
1161 sub domain_canon ($$) {
1164 return '.' if $i eq '.';
1165 die "domain $i ($w) ?" unless $i =~ m/^[0-9a-z]/i;