7 use vars qw($etcfile $where);
8 $etcfile= "/etc/bind/chiark-conf-gen.zones";
11 use vars qw($mode $verbosity $debug $needglue $localonly);
18 use vars qw($dig_owner $dig_type $dig_rdata);
20 while (@ARGV && $ARGV[0] =~ m/^\-/) {
24 if (m/^quiet$/) { $verbosity=0; }
25 elsif (m/^verbose$/) { $verbosity=2; }
26 elsif (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
27 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
28 else { usageerr("unknown option --$_"); }
33 if (s/^[ynf]//) { $mode=$&; }
34 elsif (s/^v//) { $verbosity=2; }
35 elsif (s/^q//) { $verbosity=0; }
36 elsif (s/^D//) { $debug++; }
37 elsif (s/^g//) { $needglue=0; }
38 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
39 else { usageerr("unknown option -$&"); }
44 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
45 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
47 usageerr("must specify either -f|-y|-n or zones (and not both)")
48 if !!$mode == !!@ARGV;
53 usage: named-conf-regen [-rvq] -f|-y|-n|<zone>...\n".
55 " -f --force install without checking\n".
56 " -y --yes check and install\n".
57 " -n --no check only\n".
58 "additional options:\n".
59 " -q --quiet no output for OK zones\n".
60 " -v --verbose extra verbose\n";
63 cfg_fail("config filename $etcfile should have been absolute path of a file")
64 unless $etcfile =~ m,^/, && $etcfile !~ m,/$,;
66 use vars qw($default_dir);
67 $default_dir= $etcfile;
68 $default_dir =~ s,/[^/]+$,,;
70 use vars qw($slave_dir $slave_prefix $slave_suffix);
75 use vars qw(@self_ns @self_soa);
76 @self_ns= @self_soa= ();
78 use vars qw(%zone_cfg @zone_cfg_list);
82 use vars qw($output $default_output %output_contents);
87 use vars qw($check $install);
88 $check= $mode !~ m/^f/;
89 $install= $mode =~ m/^[yf]/;
91 read_config($etcfile);
92 debug_dump('@zone_cfg_list %zone_cfg');
93 process_zones($mode ? @zone_cfg_list : @ARGV);
94 debug_dump('%output_contents');
97 #-------------------- configuration reading
99 sub cfg_fail ($) { die "$0: $where:\n $_[0]\n"; }
101 sub read_config ($) {
103 my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
106 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
108 if (!defined($_= <$fh>)) {
109 cfg_fail("read config file $if:\n $!") if $fh->error();
113 s/^\s+//; chomp; s/\s+$//;
117 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
118 @self= split /\s+/, $2;
119 @self_ns= @self if $1 ne '-soa';
120 @self_soa= @self if $1 ne '-ns';
121 } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
122 ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
123 $suffix= '_db' if !length $suffix;
124 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
125 $lprefix= length $prefix; $lsuffix= length $suffix;
126 while ($!=0, $_= readdir D) {
127 next if m/^\./ && !$lprefix;
128 next unless length > $lprefix+$lsuffix;
129 next unless substr($_,0,$lprefix) eq $prefix;
130 next unless substr($_,length($_)-$lsuffix) eq $suffix;
131 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
132 zone_conf($z,'primary',"$dir/$_");
134 $! and cfg_fail("read primary-dir $dir:\n $!");
135 closedir D or cfg_fail("close primary-dir $dir:\n $!");
136 } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
137 zone_conf($1,'primary',qualify($2));
138 } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
139 zone_conf($1,'secondary','',$2);
140 } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
141 zone_conf($1,'stealth','',split /\s+/, $2);
142 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
143 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
144 } elsif (m/^output\s+bind8\+(\S+)$/) {
145 cfg_fail("default output may not apply to only some zones")
146 if @zone_cfg_list && length $default_output;
147 set_output(qualify($1));
148 } elsif (m/^include\s+(\S+)$/) {
151 cfg_fail("unknown configuration directive".
152 " or incorrect syntax or arguments");
155 $fh->close or cfg_fail("close config file $if:\n $!");
160 $i= "$default_dir/$i" unless $i =~ m,^/,;
163 sub zone_conf ($$@) {
164 my ($zone,$style,$file,@servers) = @_;
165 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
167 if (!length $output) {
168 $default_output= qualify('chiark-conf-gen.bind8')
169 unless length $default_output;
170 set_output($default_output);
172 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
173 $zone_cfg{$zone}{'file'}= $file;
174 $zone_cfg{$zone}{'style'}= $style;
175 $zone_cfg{$zone}{'servers'}= [ @servers ];
176 $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
177 $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
178 $zone_cfg{$zone}{'output'}= $output;
179 push @zone_cfg_list, $zone;
185 $output_contents{$output}= '';
189 #-------------------- checking
191 use vars qw($zone $cfg $warnings);
195 return if !$verbosity;
200 return if $verbosity<2;
204 sub process_zones (@) {
208 foreach $zone (@zones) {
209 $cfg= $zone_cfg{$zone} || {
210 'style' => 'foreign',
213 progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
215 eval { zone_check() };
216 zone_warning("checks failed: $@") if length $@;
218 zone_output() if $install;
222 sub zone_warning ($) {
226 print STDERR "$zone: warning: $w\n" or die $!;
230 sub zone_warnmore ($) {
231 print STDERR " $_[0]\n" or die $!;
234 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
235 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
236 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
237 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
238 use vars qw(%addr_is_ok);
239 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
240 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
243 my ($super_zone, @super_nsnames,
244 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
245 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
247 %delgs= %auths= %glue= %soas= %addr_is_ok= ();
248 @to_check= @to_check_soa= ();
252 debug_trace("zone $zone superzone $super_zone");
253 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
254 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
257 for $super_ns (@super_nsnames) {
258 $super_ns= lc $super_ns;
259 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
260 foreach $addr (@super_ns_addrs) {
263 "$super_ns, server for $super_zone",
268 # We do these in order so that we always do NS RRset checks on
269 # nameservers that came from other NS RRsets first; otherwise
270 # we might set nsrrset_checked due to a glueless_ok check,
271 # and then not check for gluefulness later.
272 debug_dump('@to_check @to_check_soa');
273 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
274 push @to_check_soa, $addr, $wa if $is_auth;
275 next if $nsrrset_checked{$addr}++;
276 zone_check_nsrrset($addr, "[$addr] $wa",
277 $is_auth, $glueless_ok);
278 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
279 next if $soa_checked{$addr}++;
280 zone_check_soa($addr,"[$addr] $wa");
288 sub zone_check_nsrrset ($$$$) {
289 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
290 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
291 verbose("checking delegation by $ww");
293 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
294 $s2g{lc $dig_rdata} = [ ];
295 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
298 "$dig_owner, in glue from $ww",
300 $addr_is_ok{$dig_rdata}= "$dig_owner (NS [$uaddr])"
301 if $cfg->{'style'} eq 'stealth';
302 push @{ $s2g{$dig_owner} }, $dig_rdata;
306 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
307 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
310 @glue= @{ $s2g{$s} };
312 zone_warning("glueless NS $s, from $ww") unless $glueless_ok;
315 $glue= join ' ', sort @glue;
316 push @{ $glue{$s}{$glue} }, $ww;
319 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
320 push @{ $delgs_or_auths->{$s} }, $ww;
323 sub zone_check_soa ($$) {
324 my ($uaddr,$ww) = @_;
325 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
326 verbose("checking service at $ww");
327 $lame= 'dead or lame';
329 if ($dig_type eq 'flags:') {
330 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
331 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
332 die "several SOAs ? $ww" if defined $origin;
334 $got =~ m/^(\S+) \d+/ or die "$got ?";
339 $lame= 'broken' if !$lame && !defined $origin;
340 if ($lame) { zone_warning("$lame server $ww"); return; }
341 push @{ $soas{$got} }, $ww;
342 ($rcode,@soa_addrs)= lookup($origin,'a','0');
343 foreach $soa_addr (@soa_addrs) {
344 $addr_is_ok{$soa_addr}= "$origin (SOA [$uaddr])";
347 "$origin, SOA ORIGIN from $ww";
351 sub zone_consistency() {
352 my ($d, $org_ser, $origin, $a, $showok, $h);
353 zone_consistency_set('delegations',\%delgs);
354 foreach $d (keys %delgs) { delete $auths{$d}; }
355 zone_consistency_set('zone nameserver rrset',\%auths);
356 foreach $h (keys %glue) {
357 zone_consistency_set("glue for $h", $glue{$h});
359 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
360 if ($cfg->{'style'} eq 'primary') {
361 foreach $org_ser (keys %soas) {
362 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
364 next if grep { $_ eq $origin } @self_soa;
365 zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
366 " eg from ".((values %{ $soas{$org_ser} })[1]));
371 foreach $a (@{ $cfg->{'servers'} }) {
372 next if exists $addr_is_ok{$a};
373 zone_warning("we slave from $a"); $showok=1;
376 foreach $a (keys %addr_is_ok) {
377 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
383 sub zone_consistency_set ($%) {
386 if (keys(%$set) > 1) {
387 zone_warning("inconsistent $msg:");
388 foreach $d (keys %$set) {
389 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
395 #-------------------- outputting
398 $output_contents{$$cfg{'output'}}.=
406 $$cfg{'style'} eq 'primary' ? 'master' : 'slave',
411 #-------------------- general utilities
415 return unless $debug>1;
416 local $Data::Dumper::Terse=1;
417 foreach $vn (split /\s+/, $_[0]) {
418 print "$vn := ", eval "Dumper(\\$vn)";
422 sub debug_trace ($) {
423 return unless $debug;
428 my ($domain,$type,$okrcodes) = @_;
430 debug_trace("lookup ==> (->$okrcodes) $domain $type");
433 defined($c= open $h, "-|") or die "$0: fork adnshost:\n $!\n";
435 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
437 die "$0: exec adnshost:\n $!\n";
439 @result= $h->getlines();
440 $h->error and die "$0: read from adnshost:\n $!\n";
443 die "$0: lookup -t$type $domain $okrcodes failed $? $!\n"
444 if $! or $?>6 or index($okrcodes,$?)<0;
445 debug_trace("lookup <== $? @result");
451 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
452 # also pseudo-rr with type `flags:'
453 my ($h,$inmid,$irdata,$c);
456 debug_trace("dig ==> \@$qaddr $qowner $qtype");
459 defined($c= open $h, "-|") or die "$0: fork dig:\n $!\n";
461 open STDERR, ">&STDOUT" or die $!;
463 '+nodef','+nosea','+nodebug','+norecurse',
464 "\@$qaddr",'-t',$qtype,$qowner);
465 die "$0: exec dig:\n $!\n";
469 if (!defined($_= $h->getline())) {
470 $h->error() and die "$0: read from dig:\n $!\n";
475 s/^\s+/ / or die "$inmid // $_ ?";
479 s/$/ \(/ unless s/\s*\)\s*$//;
481 if (s/\s*\(\s*$//) { $inmid= $_; next; }
482 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
483 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
484 debug_trace("dig f: $dig_rdata");
488 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
489 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
490 if ($dig_type eq 'a') {
491 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
493 } elsif ($dig_type eq 'ns') {
494 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
495 $dig_rdata= domain_canon($irdata);
496 } elsif ($dig_type eq 'soa') {
497 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
498 or die "bad SOA $irdata ?";
499 $dig_rdata= domain_canon($1).' '.$2;
501 debug_trace("ignoring uknown RR type $dig_type");
504 debug_trace("dig $dig_owner $dig_type $dig_rdata");
507 debug_trace("ignoring unknown dig output $_");
511 debug_trace("dig <== gave $?");
514 sub domain_canon ($) {
526 my ($type,$domain) = @_;
527 my (@result)= lookup($type,$domain);
528 @result==1 or die "$0: lookup -t$type $domain gave more than one RR\n";
533 return unless $check;
535 $soa= lookup1('soa',$zone);
536 $soa_origin=$soa; $soa_origin =~ s/ .*//;
537 $soa_origin_addr= lookup1('a',$soa_origin);
539 @zone_ns= lookup('ns-',$zone);
541 @ok_sources= ($soa_origin_addr);
542 $ok_sources_descr= "SOA ORIGIN $soa_origin [$soa_origin_addr]";
544 if ($style eq 'unoff' || $style eq 'backup') {
545 for $zone_ns (@zone_ns) {
546 @zone_ns_addrs= lookup('a',$zone_ns);
547 push @ok_sources, @zone_ns_addrs;
548 $ok_sources_descr.= ", NS $zone_ns [@zone_ns_addrs]";
552 for $server (@servers) {
553 grep { $server eq $_ } @ok_sources
554 or warn "secondarying from $server which is not ".
555 "$ok_sources_desc\n";
558 if ($style eq 'secondary') {
559 grep { $zone_ns=$_, grep { $myname eq $_ } @mynames } @zone_n
560 or warn "supposedly published secondary but we ".
561 "(@mynames) are not published ($@zone_ns)\n";
568 # $superzone= $zone; $superzone =~ s/^[^\.]+\.//;
569 # @super_ns= lookup('ns-',$zone);
574 for $super_ns (@super_ns) {
576 open DIG, "dig @$super_ns. -t ns +norecurse $zone."
577 or die "$0: fork for dig:\n $!\n";
587 warning "$myname unlisted NS $nsnames"
593 warning "$myname advertised NS $nsnames"
601 set -e; a="`host -t a \"$ns\".`"; set +e
602 taddrs="`echo \" $a\" | expand | sed -n '
604 s/^[^ ][^ ]* *A *\([0-9][.0-9]*\)/\1/p
606 equlines "A $ns" "$a" "$taddrs"
607 addrs="$addrs $taddrs"
617 for server in $servers
625 if [ "x$addr" = "x$server" ]
632 warning "server $server? but $rectype $names" $addrs
647 checkhostout -val localhost
653 chdir "$base/primary" or die "$0: chdir $base/primary:\n $!";
654 beginfile('primary.zones');
657 $zone= $f; $zone =~ s/_db$//;
662 zone="`echo $f | sed -e 's/_db$//'`"
671 $currentfile_opened= $install ? "$conf/$currentfile.new" : "/dev/null";
672 open CFF, "> $toopen" or die "$0: begin $currentfile_opened:\n $!\n";
676 close CFF or die "$0: close $currentfile_opened:\n $!\n";
677 push @files, $currentfile;
680 sub installfiles () {
681 return unless $install;
682 chdir $conf or die "$0: chdir $conf:\n $!\n";
684 rename "$f.new", $f or die "$0: install new $f:\n $!\n";
689 echo >&2 "$zone $style: $*"
690 warnings=$[$warnings+1]
694 if [ "x`echo \" $2\" | wc -l`" != "x`echo \" $3\" | wc -l`" ]
702 hostout="`host $1 \"$zone\" 2>&1 >/dev/null $2 | egrep -v \
703 '^ \!\!\! .* SOA primary .* is not advertised via NS$'`"
705 if [ "x$hostout" = x ]; then return; fi
708 warning "warnings from host:"
717 echo -n "$zone $style " >&2
724 if [ $warnings != 0 ]
726 echo >&2 "$warnings warnings "