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 $!");
121 if (!defined($_= <$fh>)) {
122 cfg_fail("read config file $if:\n $!") if $fh->error();
126 s/^\s+//; chomp; s/\s+$//;
130 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
131 @self= split /\s+/, $2;
132 @self_ns= @self if $1 ne '-soa';
133 @self_soa= @self if $1 ne '-ns';
134 } elsif (m/^self\-addr\s+([0-9. \t]+)/) {
135 @self_addr= split /\s+/, $1;
136 } elsif (m/^primary\-dir([*?]?)\s+(\S+)((?:\s+(\S+))?:\s+(\S+))?$/) {
137 ($mod, $dir, $prefix, $suffix) = ($1,qualify($2),$3,$4);
138 $suffix= '_db' if !defined $suffix;
139 $prefix= '' if !defined $prefix;
140 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
141 $lprefix= length $prefix; $lsuffix= length $suffix;
142 while (defined($_= readdir D)) {
143 next if m/^\./ && !$lprefix;
144 next unless length > $lprefix+$lsuffix;
145 next unless substr($_,0,$lprefix) eq $prefix;
146 next unless substr($_,length($_)-$lsuffix) eq $suffix;
147 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
148 zone_conf($z,'primary','p',$mod,"$dir/$_");
150 closedir D or cfg_fail("close primary-dir $dir:\n $!");
151 } elsif (m/^primary([*?]?)\s+(\S+)\s+(\S+)$/) {
152 zone_conf($2,'primary','p',$1,qualify($3));
153 } elsif (m/^published([*?]?)\s+(\S+)\s+([0-9.\t]+)$/) {
154 zone_conf($2,'published','s',$1,'',$3);
155 } elsif (m/^stealth([*?]?)\s+(\S+)\s+([0-9. \t]+)$/) {
156 zone_conf($2,'stealth','u',$1,'',split /\s+/, $3);
157 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))?:\s+(\S+))?$/) {
158 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
159 } elsif (m/^output\s+bind8\+(\S+)$/) {
160 cfg_fail("default output may not apply to only some zones")
161 if @zone_cfg_list && length $default_output;
162 set_output(qualify($1));
163 } elsif (m/^include\s+(\S+)$/) {
166 cfg_fail("unknown configuration directive".
167 " or incorrect syntax or arguments");
170 $fh->close or cfg_fail("close config file $if:\n $!");
175 $i= "$default_dir/$i" unless $i =~ m,^/,;
179 sub zone_conf ($$$$$@) {
180 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
182 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
184 if (!length $output) {
185 $default_output= qualify('chiark-conf-gen.bind8')
186 unless length $default_output;
187 set_output($default_output);
189 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
190 $zone_cfg{$zone}{'file'}= $file;
191 $zone_cfg{$zone}{'style_p'}= $style.$mod;
192 $zone_cfg{$zone}{'s'}= $sabbr.$mod; # p)rimary s)econdary u)npub f)oreign
193 $zone_cfg{$zone}{'servers'}= [ @servers ];
194 foreach $sfx (qw(soa ns addr)) {
195 { no strict 'refs'; $aref= [ @{ "self_$sfx" } ]; }
196 @$aref or cfg_fail("failed to specify self-$sfx before zone");
197 $zone_cfg{$zone}{"self_$sfx"}= $aref;
199 $zone_cfg{$zone}{'output'}= $output;
200 push @zone_cfg_list, $zone;
206 $output_contents{$output}= '';
210 #-------------------- checking
212 use vars qw($zone $cfg $warnings);
216 return if !$verbosity;
221 return if $verbosity<2;
225 sub process_zones (@) {
229 foreach $zone (@zones) {
230 $cfg= $zone_cfg{$zone} || {
231 'style_p' => 'foreign',
235 progress(sprintf "%-40s %s", $zone, $$cfg{'style_p'});
236 if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) {
238 if ($localonly && $cfg->{'s'} =~ m/f/) {
239 zone_warning("foreign zone specified with -l");
240 } elsif ($cfg->{'s'} =~ m/\*/ ||
241 ($localonly && $cfg->{'s'} !~ m/p/)) {
247 zone_warning("checks failed: $@") if length $@;
249 zone_output() if $install;
251 print STDERR "$quis: $warnings warnings\n" or die $!
255 sub zone_warning ($) {
259 print STDERR "$zone: warning: $w\n" or die $!;
263 sub zone_warnmore ($) {
264 print STDERR " $_[0]\n" or die $!;
267 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
268 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
269 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
270 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
271 use vars qw(%addr_is_ok %warned_glueless %warned_mynameaddr);
272 use vars qw($delg_to_us);
273 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
274 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
276 sub zone_check_full () {
284 %delgs= %auths= %glue= %soas=
285 %warned_glueless= %warned_mynameaddr=
288 @to_check= @to_check_soa= ();
291 sub zone_investigate() {
292 my ($super_zone, @super_nsnames,
293 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
294 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
298 debug_trace("zone $zone superzone $super_zone");
299 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
300 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
303 for $super_ns (@super_nsnames) {
304 $super_ns= lc $super_ns;
305 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
306 foreach $addr (@super_ns_addrs) {
309 "$super_ns, server for $super_zone",
314 # We do these in order so that we always do NS RRset checks on
315 # nameservers that came from other NS RRsets first; otherwise
316 # we might set nsrrset_checked due to a glueless_ok check,
317 # and then not check for gluefulness later.
318 debug_dump('@to_check @to_check_soa');
319 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
320 push @to_check_soa, $addr, $wa if $is_auth;
321 next if $nsrrset_checked{$addr}++;
322 zone_check_nsrrset($addr, "[$addr] $wa",
323 $is_auth, $glueless_ok);
324 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
325 next if $soa_checked{$addr}++;
326 zone_check_soa($addr,"[$addr] $wa","[$addr] NS");
333 sub zone_check_nsrrset ($$$$) {
334 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
335 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths, $wwn);
336 verbose("checking delegation by $ww");
338 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
339 $s2g{lc $dig_rdata} = [ ];
340 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
341 $wwn= "in glue from $ww";
342 push @to_check, $dig_rdata, "$dig_owner, $wwn", 1, 0;
343 zone_server_addr($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
344 push @{ $s2g{$dig_owner} }, $dig_rdata;
348 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
349 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
352 @glue= @{ $s2g{$s} };
354 zone_warning("glueless NS $s,".
355 ($needglue<=1 ? " (eg)" : "").
357 unless $glueless_ok || !$needglue ||
358 ($needglue<=1 && $warned_glueless{$s}++);
361 $glue= join ' ', sort @glue;
362 push @{ $glue{$s}{$glue} }, $ww;
365 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
366 push @{ $delgs_or_auths->{$s} }, $ww;
369 sub zone_server_addr ($$$$$) {
370 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
371 $addr_is_ok{$addr}= "$name ($wwq)"
372 if $is_soa || $cfg->{'s'} =~ m/u/;
373 zone_warning("configured as stealth but we [$addr]".
374 " are published ($name $wwq)")
375 if $cfg->{'s'} =~ m/u/ && grep { $_ eq $addr } @self_addr;
377 my ($name_is_self, $addr_is_self);
378 $name_is_self= grep { $_ eq $name }
379 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
380 $addr_is_self= grep { $_ eq $addr }
381 @{ $cfg->{'self_addr'} };
382 if ($name_is_self && !$addr_is_self) {
383 zone_warning("our name $name with wrong address [$addr], (eg) $ww")
384 unless $warned_mynameaddr{$name}{$addr}++;
385 } elsif (!$name_is_self && $addr_is_self) {
386 zone_warning(($is_soa ? "SOA ORIGIN maps to" : "allegedly served by").
387 " us [$addr] with wrong name $name, (eg) $ww")
388 unless $warned_mynameaddr{$name}{$addr}++;
390 $delg_to_us=1 if $name_is_self;
393 sub zone_check_soa ($$$) {
394 my ($uaddr,$ww,$wwq) = @_;
395 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr,$wwn);
396 verbose("checking service at $wwq");
397 $lame= 'dead or lame';
399 if ($dig_type eq 'flags:') {
400 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
401 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
402 die "several SOAs ? $ww" if defined $origin;
404 $got =~ m/^(\S+) \d+/ or die "$got ?";
409 $lame= 'broken' if !$lame && !defined $origin;
410 if ($lame) { zone_warning("$lame server $ww"); return; }
411 push @{ $soas{$got} }, $ww;
412 ($rcode,@soa_addrs)= lookup($origin,'a','0');
413 foreach $soa_addr (@soa_addrs) {
414 $wwn= "SOA ORIGIN from $ww";
415 zone_server_addr($soa_addr,$origin,$wwn,"SOA [$uaddr]",1);
416 push @to_check, $soa_addr, "$origin, $wwn";
420 sub zone_consistency() {
421 my ($d, $org_ser, $origin, $a, $h, $self_soa);
422 zone_consistency_set('delegations',\%delgs);
423 foreach $d (keys %delgs) { delete $auths{$d}; }
424 zone_consistency_set('zone nameserver rrset',\%auths);
425 foreach $h (keys %glue) {
426 zone_consistency_set("glue for $h", $glue{$h});
428 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
429 $self_soa= $cfg->{'self_soa'};
430 if ($cfg->{'s'} =~ m/p/) {
431 foreach $org_ser (keys %soas) {
432 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
434 next if grep { $_ eq $origin } @$self_soa;
435 zone_warning("SOA ORIGIN $origin is not our name (@$self_soa),".
436 " eg from ".($soas{$org_ser}[0]));
441 sub zone_servers_ok () {
445 foreach $a (@{ $cfg->{'servers'} }) {
446 next if exists $addr_is_ok{$a};
447 zone_warning("we slave from $a"); $showok=1;
450 foreach $a (keys %addr_is_ok) {
451 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
455 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
456 zone_warnmore("we are supposedly published secondary,".
457 " but not listed as a nameserver");
461 sub zone_consistency_set ($%) {
464 if (keys(%$set) > 1) {
465 zone_warning("inconsistent $msg:");
466 foreach $d (keys %$set) {
467 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
472 sub zone_check_local () {
474 zone_servers_simplefind();
478 sub zone_servers_simplefind () {
479 my ($rcode,@nsnames,$ns,@soas,$origin);
481 ($rcode,@nsnames)= lookup($zone,'ns-','0');
482 foreach $ns (@nsnames) { zone_server_simple($ns,'NS',0); }
484 ($rcode,@soas)= lookup($zone,'soa','0');
485 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
486 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
487 zone_server_simple(domain_canon($1),'SOA',1);
490 sub zone_server_simple ($$$) {
491 my ($name,$ww,$is_soa) = @_;
492 my ($rcode,@addrs,$addr);
493 ($rcode,@addrs)= lookup($name,'a','0');
494 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
497 #-------------------- outputting
500 $output_contents{$$cfg{'output'}}.=
508 $$cfg{'s'} =~ m/p/ ? 'master' : 'slave',
513 #-------------------- general utilities
517 return unless $debug>1;
518 local $Data::Dumper::Terse=1;
519 foreach $vn (split /\s+/, $_[0]) {
520 print "$vn := ", eval "Dumper(\\$vn)";
524 sub debug_trace ($) {
525 return unless $debug;
530 my ($domain,$type,$okrcodes) = @_;
532 debug_trace("lookup ==> (->$okrcodes) $domain $type");
535 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
537 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
539 die "$quis: exec adnshost:\n $!\n";
541 @result= $h->getlines();
542 $h->error and die "$quis: read from adnshost:\n $!\n";
545 die "$quis: lookup -t$type $domain $okrcodes failed $? $!\n"
546 if $! or $?>6 or index($okrcodes,$?)<0;
547 debug_trace("lookup <== $? @result");
553 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
554 # also pseudo-rr with type `flags:'
555 my ($h,$inmid,$irdata,$c);
558 debug_trace("dig ==> \@$qaddr $qowner $qtype");
561 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
563 open STDERR, ">&STDOUT" or die $!;
565 '+nodef','+nosea','+nodebug','+norecurse',
566 "\@$qaddr",'-t',$qtype,$qowner);
567 die "$quis: exec dig:\n $!\n";
571 if (!defined($_= $h->getline())) {
572 $h->error() and die "$quis: read from dig:\n $!\n";
577 s/^\s+/ / or die "$inmid // $_ ?";
581 s/$/ \(/ unless s/\s*\)\s*$//;
583 if (s/\s*\(\s*$//) { $inmid= $_; next; }
584 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
585 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
586 debug_trace("dig f: $dig_rdata");
590 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
591 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
592 if ($dig_type eq 'a') {
593 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
595 } elsif ($dig_type eq 'ns') {
596 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
597 $dig_rdata= domain_canon($irdata);
598 } elsif ($dig_type eq 'soa') {
599 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
600 or die "bad SOA $irdata ?";
601 $dig_rdata= domain_canon($1).' '.$2;
603 debug_trace("ignoring uknown RR type $dig_type");
606 debug_trace("dig $dig_owner $dig_type $dig_rdata");
609 debug_trace("ignoring unknown dig output $_");
613 debug_trace("dig <== gave $?");
616 sub domain_canon ($) {
619 die "domain $_ ?" unless m/^[0-9a-z]/i;