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 $slave_suffix);
87 use vars qw(@self_ns @self_soa);
88 @self_ns= @self_soa= ();
90 use vars qw(%zone_cfg @zone_cfg_list);
94 use vars qw($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, $dir,$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+/, $2;
136 } elsif (m/^primary\-dir([*?]?)\s+(\S+)((?:\s+(\S+))?:\s+(\S+))?$/) {
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 ($$$@) {
180 my ($zone,$style,$s,$file,@servers) = @_;
181 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
183 if (!length $output) {
184 $default_output= qualify('chiark-conf-gen.bind8')
185 unless length $default_output;
186 set_output($default_output);
188 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
189 $zone_cfg{$zone}{'file'}= $file;
190 $zone_cfg{$zone}{'style_p'}= $style.$mod;
191 $zone_cfg{$zone}{'s'}= $s; # p)rimary s)econdary u)npublished f)oreign
192 $zone_cfg{$zone}{'servers'}= [ @servers ];
193 $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
194 $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
195 $zone_cfg{$zone}{'output'}= $output;
196 push @zone_cfg_list, $zone;
202 $output_contents{$output}= '';
206 #-------------------- checking
208 use vars qw($zone $cfg $warnings);
212 return if !$verbosity;
217 return if $verbosity<2;
221 sub process_zones (@) {
225 foreach $zone (@zones) {
226 $cfg= $zone_cfg{$zone} || {
227 'style_p' => 'foreign',
231 progress(sprintf "%-40s %s", $zone, $$cfg{'style_p'});
232 if ($check && ($doall || $cfg{'s'} !~ m/\?/)) {
234 if ($localonly && $cfg->{'s'} =~ m/f/) {
235 zone_warning("foreign zone specified with -l");
236 } elsif ($cfg->{'s'} =~ m/\*/ ||
237 ($localonly && $cfg->{'s'} !~ m/p/)) {
243 zone_warning("checks failed: $@") if length $@;
245 zone_output() if $install;
247 print STDERR "$quis: $warnings warnings\n" or die $!
251 sub zone_warning ($) {
255 print STDERR "$zone: warning: $w\n" or die $!;
259 sub zone_warnmore ($) {
260 print STDERR " $_[0]\n" or die $!;
263 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
264 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
265 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
266 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
267 use vars qw(%addr_is_ok %gluelesswarned);
268 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
269 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
271 sub zone_check_full () {
279 %delgs= %auths= %glue= %soas= %gluelesswarned= %addr_is_ok= ();
280 @to_check= @to_check_soa= ();
283 sub zone_investigate() {
284 my ($super_zone, @super_nsnames,
285 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
286 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
290 debug_trace("zone $zone superzone $super_zone");
291 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
292 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
295 for $super_ns (@super_nsnames) {
296 $super_ns= lc $super_ns;
297 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
298 foreach $addr (@super_ns_addrs) {
301 "$super_ns, server for $super_zone",
306 # We do these in order so that we always do NS RRset checks on
307 # nameservers that came from other NS RRsets first; otherwise
308 # we might set nsrrset_checked due to a glueless_ok check,
309 # and then not check for gluefulness later.
310 debug_dump('@to_check @to_check_soa');
311 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
312 push @to_check_soa, $addr, $wa if $is_auth;
313 next if $nsrrset_checked{$addr}++;
314 zone_check_nsrrset($addr, "[$addr] $wa",
315 $is_auth, $glueless_ok);
316 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
317 next if $soa_checked{$addr}++;
318 zone_check_soa($addr,"[$addr] $wa");
325 sub zone_check_nsrrset ($$$$) {
326 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
327 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
328 verbose("checking delegation by $ww");
330 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
331 $s2g{lc $dig_rdata} = [ ];
332 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
335 "$dig_owner, in glue from $ww",
337 zone_server_addr($dig_rdata,$dig_owner,"NS [$uaddr]");
338 push @{ $s2g{$dig_owner} }, $dig_rdata;
342 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
343 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
346 @glue= @{ $s2g{$s} };
348 zone_warning("glueless NS $s,".
349 ($needglue<=1 ? " (eg)" : "").
351 unless $glueless_ok || !$needglue ||
352 ($needglue<=1 && $gluelesswarned{$s}++);
355 $glue= join ' ', sort @glue;
356 push @{ $glue{$s}{$glue} }, $ww;
359 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
360 push @{ $delgs_or_auths->{$s} }, $ww;
363 sub zone_server_addr ($$$$) {
364 my ($addr,$name,$ww,$is_soa) = @_;
365 $addr_is_ok{$addr}= "$name ($ww)"
366 if $is_soa || $cfg{'s'} =~ m/u/;
367 zone_warning("configured as stealth but we [$addr]".
368 " are published ($name $ww)")
369 if $cfg->{'s'} =~ m/u/ && grep { $_ eq $addr } @self_addr;
372 sub zone_check_soa ($$) {
373 my ($uaddr,$ww) = @_;
374 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
375 verbose("checking service at $ww");
376 $lame= 'dead or lame';
378 if ($dig_type eq 'flags:') {
379 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
380 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
381 die "several SOAs ? $ww" if defined $origin;
383 $got =~ m/^(\S+) \d+/ or die "$got ?";
388 $lame= 'broken' if !$lame && !defined $origin;
389 if ($lame) { zone_warning("$lame server $ww"); return; }
390 push @{ $soas{$got} }, $ww;
391 ($rcode,@soa_addrs)= lookup($origin,'a','0');
392 foreach $soa_addr (@soa_addrs) {
393 zone_server_addr($addr,$origin,"SOA [$uaddr]"
396 "$origin, SOA ORIGIN from $ww";
400 sub zone_consistency() {
401 my ($d, $org_ser, $origin, $a, $h);
402 zone_consistency_set('delegations',\%delgs);
403 foreach $d (keys %delgs) { delete $auths{$d}; }
404 zone_consistency_set('zone nameserver rrset',\%auths);
405 foreach $h (keys %glue) {
406 zone_consistency_set("glue for $h", $glue{$h});
408 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
409 if ($cfg->{'s'} =~ m/p/) {
410 foreach $org_ser (keys %soas) {
411 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
413 next if grep { $_ eq $origin } @self_soa;
414 zone_warning("our name (@self_soa) not in SOA ORIGIN $origin,".
415 " eg from ".((values %{ $soas{$org_ser} })[1]));
420 sub zone_servers_ok () {
424 foreach $a (@{ $cfg->{'servers'} }) {
425 next if exists $addr_is_ok{$a};
426 zone_warning("we slave from $a"); $showok=1;
429 foreach $a (keys %addr_is_ok) {
430 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
436 sub zone_consistency_set ($%) {
439 if (keys(%$set) > 1) {
440 zone_warning("inconsistent $msg:");
441 foreach $d (keys %$set) {
442 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
447 sub zone_check_local () {
449 zone_servers_simplefind();
453 sub zone_servers_simplefind () {
454 my ($rcode,@nsnames,$ns,@soas,$origin);
456 ($rcode,@nsnames)= lookup($zone,'ns-','0');
457 foreach $ns (@nsnames) { zone_server_simple($ns,'NS'); }
459 ($rcode,@soas)= lookup($zone,'soa','0');
460 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
461 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
462 zone_server_simple(domain_canon($1),'SOA');
465 sub zone_server_simple ($$) {
466 my ($name,$why) = @_;
467 my ($rcode,@addrs,$addr);
468 ($rcode,@addrs)= lookup($name,'a','0');
469 foreach $addr (@addrs) { zone_server_addr($addr,$name,$why); }
472 #-------------------- outputting
475 $output_contents{$$cfg{'output'}}.=
483 $$cfg{'s'} =~ m/p/ ? 'master' : 'slave',
488 #-------------------- general utilities
492 return unless $debug>1;
493 local $Data::Dumper::Terse=1;
494 foreach $vn (split /\s+/, $_[0]) {
495 print "$vn := ", eval "Dumper(\\$vn)";
499 sub debug_trace ($) {
500 return unless $debug;
505 my ($domain,$type,$okrcodes) = @_;
507 debug_trace("lookup ==> (->$okrcodes) $domain $type");
510 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
512 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
514 die "$quis: exec adnshost:\n $!\n";
516 @result= $h->getlines();
517 $h->error and die "$quis: read from adnshost:\n $!\n";
520 die "$quis: lookup -t$type $domain $okrcodes failed $? $!\n"
521 if $! or $?>6 or index($okrcodes,$?)<0;
522 debug_trace("lookup <== $? @result");
528 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
529 # also pseudo-rr with type `flags:'
530 my ($h,$inmid,$irdata,$c);
533 debug_trace("dig ==> \@$qaddr $qowner $qtype");
536 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
538 open STDERR, ">&STDOUT" or die $!;
540 '+nodef','+nosea','+nodebug','+norecurse',
541 "\@$qaddr",'-t',$qtype,$qowner);
542 die "$quis: exec dig:\n $!\n";
546 if (!defined($_= $h->getline())) {
547 $h->error() and die "$quis: read from dig:\n $!\n";
552 s/^\s+/ / or die "$inmid // $_ ?";
556 s/$/ \(/ unless s/\s*\)\s*$//;
558 if (s/\s*\(\s*$//) { $inmid= $_; next; }
559 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
560 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
561 debug_trace("dig f: $dig_rdata");
565 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
566 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
567 if ($dig_type eq 'a') {
568 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
570 } elsif ($dig_type eq 'ns') {
571 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
572 $dig_rdata= domain_canon($irdata);
573 } elsif ($dig_type eq 'soa') {
574 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
575 or die "bad SOA $irdata ?";
576 $dig_rdata= domain_canon($1).' '.$2;
578 debug_trace("ignoring uknown RR type $dig_type");
581 debug_trace("dig $dig_owner $dig_type $dig_rdata");
584 debug_trace("ignoring unknown dig output $_");
588 debug_trace("dig <== gave $?");
591 sub domain_canon ($) {
594 die "domain $_ ?" unless m/^[0-9a-z]/i;