10 $debug $needglue $localonly $verbosity);
12 $quis= $0; $quis =~ s,.*/,,;
16 $etcfile= "/etc/bind/chiark-conf-gen.zones";
23 use vars qw($dig_owner $dig_type $dig_rdata);
25 while (@ARGV && $ARGV[0] =~ m/^\-/) {
29 if (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
30 elsif (m/^all$/) { $doall=1; }
31 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
32 elsif (m/^glueless$/) { $needglue--; }
33 elsif (m/^localonly$/) { $localonly=1; }
34 elsif (m/^quiet$/) { $verbosity=0; }
35 elsif (m/^verbose$/) { $verbosity=2; }
36 else { usageerr("unknown option --$_"); }
41 if (s/^[ynf]//) { $mode=$&; }
42 elsif (s/^A//) { $doall=1; }
43 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
44 elsif (s/^D//) { $debug++; }
45 elsif (s/^g//) { $needglue--; }
46 elsif (s/^l//) { $localonly=1; }
47 elsif (s/^q//) { $verbosity=0; }
48 elsif (s/^v//) { $verbosity=2; }
49 else { usageerr("unknown option -$&"); }
54 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
55 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
57 usageerr("-g may be specified at most twice") if $needglue<0;
58 usageerr("-D may be specified at most twice") if $debug>2;
59 usageerr("must specify either -f|-y|-n or zones (and not both)")
60 if !!$mode == !!@ARGV;
65 usage: named-conf-regen [-rvq] -f|-y|-n|<zone>...\n".
67 " -f --force install without checking\n".
68 " -y --yes check and install\n".
69 " -n --no check only\n".
70 "additional options:\n".
71 " -q --quiet no output for OK zones\n".
72 " -v --verbose extra verbose\n";
75 cfg_fail("config filename $etcfile should have been absolute path of a file")
76 unless $etcfile =~ m,^/, && $etcfile !~ m,/$,;
78 use vars qw($default_dir);
79 $default_dir= $etcfile;
80 $default_dir =~ s,/[^/]+$,,;
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($mode ? @zone_cfg_list : @ARGV);
106 debug_dump('%output_contents');
110 #-------------------- configuration reading
112 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
114 sub read_config ($) {
116 my ($fh,$z,@self, $mod,$dir,$prefix,$suffix,$lprefix,$lsuffix);
119 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
122 if (!defined($_= <$fh>)) {
123 cfg_fail("read config file $if:\n $!") if $fh->error();
126 s/^\s+//; chomp; s/\s+$//;
127 if (m/\\$/) { $before.= $_; next; }
134 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
135 @self= split /\s+/, $2;
136 @self_ns= @self if $1 ne '-soa';
137 @self_soa= @self if $1 ne '-ns';
138 } elsif (m/^self\-addr\s+([0-9. \t]+)/) {
139 @self_addr= split /\s+/, $1;
140 } elsif (m/^primary\-dir([*?]?)\s+(\S+)((?:\s+(\S+))?:\s+(\S+))?$/) {
141 ($mod, $dir, $prefix, $suffix) = ($1,qualify($2),$3,$4);
142 $suffix= '_db' if !defined $suffix;
143 $prefix= '' if !defined $prefix;
144 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
145 $lprefix= length $prefix; $lsuffix= length $suffix;
146 while (defined($_= readdir D)) {
147 next if m/^\./ && !$lprefix;
148 next unless length > $lprefix+$lsuffix;
149 next unless substr($_,0,$lprefix) eq $prefix;
150 next unless substr($_,length($_)-$lsuffix) eq $suffix;
151 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
152 zone_conf($z,'primary','p',$mod,"$dir/$_");
154 closedir D or cfg_fail("close primary-dir $dir:\n $!");
155 } elsif (m/^primary([*?]?)\s+(\S+)\s+(\S+)$/) {
156 zone_conf($2,'primary','p',$1,qualify($3));
157 } elsif (m/^published([*?]?)\s+(\S+)\s+([0-9.\t]+)$/) {
158 zone_conf($2,'published','s',$1,'',$3);
159 } elsif (m/^stealth([*?]?)\s+(\S+)\s+([0-9. \t]+)$/) {
160 zone_conf($2,'stealth','u',$1,'',split /\s+/, $3);
161 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))?:\s+(\S+))?$/) {
162 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
163 } elsif (m/^output\s+bind8\+(\S+)$/) {
164 cfg_fail("default output may not apply to only some zones")
165 if @zone_cfg_list && length $default_output;
166 set_output(qualify($1));
167 } elsif (m/^include\s+(\S+)$/) {
170 cfg_fail("unknown configuration directive".
171 " or incorrect syntax or arguments");
174 $fh->close or cfg_fail("close config file $if:\n $!");
179 $i= "$default_dir/$i" unless $i =~ m,^/,;
183 sub zone_conf ($$$$$@) {
184 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
186 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
188 if (!length $output) {
189 $default_output= qualify('chiark-conf-gen.bind8')
190 unless length $default_output;
191 set_output($default_output);
193 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
194 $zone_cfg{$zone}{'file'}= $file;
195 $zone_cfg{$zone}{'style_p'}= $style.$mod;
196 $zone_cfg{$zone}{'s'}= $sabbr.$mod; # p)rimary s)econdary u)npub f)oreign
197 $zone_cfg{$zone}{'servers'}= [ @servers ];
198 foreach $sfx (qw(soa ns addr)) {
199 { no strict 'refs'; $aref= [ @{ "self_$sfx" } ]; }
200 @$aref or cfg_fail("failed to specify self-$sfx before zone");
201 $zone_cfg{$zone}{"self_$sfx"}= $aref;
203 $zone_cfg{$zone}{'output'}= $output;
204 push @zone_cfg_list, $zone;
210 $output_contents{$output}= '';
214 #-------------------- checking
216 use vars qw($zone $cfg $warnings);
220 return if !$verbosity;
225 return if $verbosity<2;
229 sub process_zones (@) {
233 foreach $zone (@zones) {
234 $cfg= $zone_cfg{$zone} || {
235 'style_p' => 'foreign',
239 progress(sprintf "%-40s %s", $zone, $$cfg{'style_p'});
240 if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) {
242 if ($localonly && $cfg->{'s'} =~ m/f/) {
243 zone_warning("foreign zone specified with -l");
244 } elsif ($cfg->{'s'} =~ m/\*/ ||
245 ($localonly && $cfg->{'s'} !~ m/p/)) {
251 zone_warning("checks failed: $@") if length $@;
253 zone_output() if $install;
255 print STDERR "$quis: $warnings warnings\n" or die $!
259 sub zone_warning ($) {
263 print STDERR "$zone: warning: $w\n" or die $!;
267 sub zone_warnmore ($) {
268 print STDERR " $_[0]\n" or die $!;
271 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
272 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
273 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
274 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
275 use vars qw(%addr_is_ok %warned_glueless %warned_mynameaddr);
276 use vars qw($delg_to_us);
277 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
278 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
280 sub zone_check_full () {
288 %delgs= %auths= %glue= %soas=
289 %warned_glueless= %warned_mynameaddr=
292 @to_check= @to_check_soa= ();
295 sub zone_investigate() {
296 my ($super_zone, @super_nsnames,
297 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
298 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
302 debug_trace("zone $zone superzone $super_zone");
303 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
304 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
307 for $super_ns (@super_nsnames) {
308 $super_ns= lc $super_ns;
309 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
310 foreach $addr (@super_ns_addrs) {
313 "$super_ns, server for $super_zone",
318 # We do these in order so that we always do NS RRset checks on
319 # nameservers that came from other NS RRsets first; otherwise
320 # we might set nsrrset_checked due to a glueless_ok check,
321 # and then not check for gluefulness later.
322 debug_dump('@to_check @to_check_soa');
323 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
324 push @to_check_soa, $addr, $wa if $is_auth;
325 next if $nsrrset_checked{$addr}++;
326 zone_check_nsrrset($addr, "[$addr] $wa",
327 $is_auth, $glueless_ok);
328 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
329 next if $soa_checked{$addr}++;
330 zone_check_soa($addr,"[$addr] $wa","[$addr] NS");
337 sub zone_check_nsrrset ($$$$) {
338 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
339 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths, $wwn);
340 verbose("checking delegation by $ww");
342 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
343 $s2g{lc $dig_rdata} = [ ];
344 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
345 $wwn= "in glue from $ww";
346 push @to_check, $dig_rdata, "$dig_owner, $wwn", 1, 0;
347 zone_server_addr($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
348 push @{ $s2g{$dig_owner} }, $dig_rdata;
352 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
353 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
356 @glue= @{ $s2g{$s} };
358 zone_warning("glueless NS $s,".
359 ($needglue<=1 ? " (eg)" : "").
361 unless $glueless_ok || !$needglue ||
362 ($needglue<=1 && $warned_glueless{$s}++);
365 $glue= join ' ', sort @glue;
366 push @{ $glue{$s}{$glue} }, $ww;
369 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
370 push @{ $delgs_or_auths->{$s} }, $ww;
373 sub zone_server_addr ($$$$$) {
374 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
375 $addr_is_ok{$addr}= "$name ($wwq)"
376 if $is_soa || $cfg->{'s'} =~ m/u/;
377 zone_warning("configured as stealth but we [$addr]".
378 " are published ($name $wwq)")
379 if $cfg->{'s'} =~ m/u/ && grep { $_ eq $addr } @self_addr;
381 my ($name_is_self, $addr_is_self);
382 $name_is_self= grep { $_ eq $name }
383 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
384 $addr_is_self= grep { $_ eq $addr }
385 @{ $cfg->{'self_addr'} };
386 if ($name_is_self && !$addr_is_self) {
387 zone_warning("our name $name with wrong address [$addr], (eg) $ww")
388 unless $warned_mynameaddr{$name}{$addr}++;
389 } elsif (!$name_is_self && $addr_is_self) {
390 zone_warning(($is_soa ? "SOA ORIGIN maps to" : "allegedly served by").
391 " us [$addr] with wrong name $name, (eg) $ww")
392 unless $warned_mynameaddr{$name}{$addr}++;
394 $delg_to_us=1 if $name_is_self;
397 sub zone_check_soa ($$$) {
398 my ($uaddr,$ww,$wwq) = @_;
399 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr,$wwn);
400 verbose("checking service at $wwq");
401 $lame= 'dead or lame';
403 if ($dig_type eq 'flags:') {
404 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
405 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
406 die "several SOAs ? $ww" if defined $origin;
408 $got =~ m/^(\S+) \d+/ or die "$got ?";
413 $lame= 'broken' if !$lame && !defined $origin;
414 if ($lame) { zone_warning("$lame server $ww"); return; }
415 push @{ $soas{$got} }, $ww;
416 ($rcode,@soa_addrs)= lookup($origin,'a','0');
417 foreach $soa_addr (@soa_addrs) {
418 $wwn= "SOA ORIGIN from $ww";
419 zone_server_addr($soa_addr,$origin,$wwn,"SOA [$uaddr]",1);
420 push @to_check, $soa_addr, "$origin, $wwn";
424 sub zone_consistency() {
425 my ($d, $org_ser, $origin, $a, $h, $self_soa);
426 zone_consistency_set('delegations',\%delgs);
427 foreach $d (keys %delgs) { delete $auths{$d}; }
428 zone_consistency_set('zone nameserver rrset',\%auths);
429 foreach $h (keys %glue) {
430 zone_consistency_set("glue for $h", $glue{$h});
432 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
433 $self_soa= $cfg->{'self_soa'};
434 if ($cfg->{'s'} =~ m/p/) {
435 foreach $org_ser (keys %soas) {
436 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
438 next if grep { $_ eq $origin } @$self_soa;
439 zone_warning("SOA ORIGIN $origin is not our name (@$self_soa),".
440 " eg from ".($soas{$org_ser}[0]));
445 sub zone_servers_ok () {
449 foreach $a (@{ $cfg->{'servers'} }) {
450 next if exists $addr_is_ok{$a};
451 zone_warning("we slave from $a"); $showok=1;
454 foreach $a (keys %addr_is_ok) {
455 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
459 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
460 zone_warnmore("we are supposedly published secondary,".
461 " but not listed as a nameserver");
465 sub zone_consistency_set ($%) {
468 if (keys(%$set) > 1) {
469 zone_warning("inconsistent $msg:");
470 foreach $d (keys %$set) {
471 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
476 sub zone_check_local () {
478 zone_servers_simplefind();
482 sub zone_servers_simplefind () {
483 my ($rcode,@nsnames,$ns,@soas,$origin);
485 ($rcode,@nsnames)= lookup($zone,'ns-','0');
486 foreach $ns (@nsnames) { zone_server_simple($ns,'NS',0); }
488 ($rcode,@soas)= lookup($zone,'soa','0');
489 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
490 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
491 zone_server_simple(domain_canon($1),'SOA',1);
494 sub zone_server_simple ($$$) {
495 my ($name,$ww,$is_soa) = @_;
496 my ($rcode,@addrs,$addr);
497 ($rcode,@addrs)= lookup($name,'a','0');
498 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
501 #-------------------- outputting
504 $output_contents{$$cfg{'output'}}.=
512 $$cfg{'s'} =~ m/p/ ? 'master' : 'slave',
517 #-------------------- general utilities
521 return unless $debug>1;
522 local $Data::Dumper::Terse=1;
523 foreach $vn (split /\s+/, $_[0]) {
524 print "$vn := ", eval "Dumper(\\$vn)";
528 sub debug_trace ($) {
529 return unless $debug;
534 my ($domain,$type,$okrcodes) = @_;
536 debug_trace("lookup ==> (->$okrcodes) $domain $type");
539 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
541 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
543 die "$quis: exec adnshost:\n $!\n";
545 @result= $h->getlines();
546 $h->error and die "$quis: read from adnshost:\n $!\n";
549 die "$quis: lookup -t$type $domain $okrcodes failed $? $!\n"
550 if $! or $?>6 or index($okrcodes,$?)<0;
551 debug_trace("lookup <== $? @result");
557 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
558 # also pseudo-rr with type `flags:'
559 my ($h,$inmid,$irdata,$c);
562 debug_trace("dig ==> \@$qaddr $qowner $qtype");
565 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
567 open STDERR, ">&STDOUT" or die $!;
569 '+nodef','+nosea','+nodebug','+norecurse',
570 "\@$qaddr",'-t',$qtype,$qowner);
571 die "$quis: exec dig:\n $!\n";
575 if (!defined($_= $h->getline())) {
576 $h->error() and die "$quis: read from dig:\n $!\n";
581 s/^\s+/ / or die "$inmid // $_ ?";
585 s/$/ \(/ unless s/\s*\)\s*$//;
587 if (s/\s*\(\s*$//) { $inmid= $_; next; }
588 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
589 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
590 debug_trace("dig f: $dig_rdata");
594 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
595 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
596 if ($dig_type eq 'a') {
597 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
599 } elsif ($dig_type eq 'ns') {
600 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
601 $dig_rdata= domain_canon($irdata);
602 } elsif ($dig_type eq 'soa') {
603 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
604 or die "bad SOA $irdata ?";
605 $dig_rdata= domain_canon($1).' '.$2;
607 debug_trace("ignoring uknown RR type $dig_type");
610 debug_trace("dig $dig_owner $dig_type $dig_rdata");
613 debug_trace("ignoring unknown dig output $_");
617 debug_trace("dig <== gave $?");
620 sub domain_canon ($) {
623 die "domain $_ ?" unless m/^[0-9a-z]/i;