7 use vars qw($quis $mode
9 $debug $needglue $localonly $verbosity);
11 $quis= $0; $quis =~ s,.*/,,;
14 $etcfile= "/etc/bind/chiark-conf-gen.zones";
21 use vars qw($dig_owner $dig_type $dig_rdata);
23 while (@ARGV && $ARGV[0] =~ m/^\-/) {
27 if (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
28 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
29 elsif (m/^glueless$/) { $needglue=0; }
30 elsif (m/^localonly$/) { $localonly=1; }
31 elsif (m/^quiet$/) { $verbosity=0; }
32 elsif (m/^verbose$/) { $verbosity=2; }
33 else { usageerr("unknown option --$_"); }
38 if (s/^[ynf]//) { $mode=$&; }
39 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
40 elsif (s/^D//) { $debug++; }
41 elsif (s/^g//) { $needglue=0; }
42 elsif (s/^l//) { $localonly=1; }
43 elsif (s/^q//) { $verbosity=0; }
44 elsif (s/^v//) { $verbosity=2; }
45 else { usageerr("unknown option -$&"); }
50 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
51 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
53 usageerr("must specify either -f|-y|-n or zones (and not both)")
54 if !!$mode == !!@ARGV;
59 usage: named-conf-regen [-rvq] -f|-y|-n|<zone>...\n".
61 " -f --force install without checking\n".
62 " -y --yes check and install\n".
63 " -n --no check only\n".
64 "additional options:\n".
65 " -q --quiet no output for OK zones\n".
66 " -v --verbose extra verbose\n";
69 cfg_fail("config filename $etcfile should have been absolute path of a file")
70 unless $etcfile =~ m,^/, && $etcfile !~ m,/$,;
72 use vars qw($default_dir);
73 $default_dir= $etcfile;
74 $default_dir =~ s,/[^/]+$,,;
76 use vars qw($slave_dir $slave_prefix $slave_suffix);
81 use vars qw(@self_ns @self_soa);
82 @self_ns= @self_soa= ();
84 use vars qw(%zone_cfg @zone_cfg_list);
88 use vars qw($output $default_output %output_contents);
93 use vars qw($check $install);
94 $check= $mode !~ m/^f/;
95 $install= $mode =~ m/^[yf]/;
97 read_config($etcfile);
98 debug_dump('@zone_cfg_list %zone_cfg');
99 process_zones($mode ? @zone_cfg_list : @ARGV);
100 debug_dump('%output_contents');
104 #-------------------- configuration reading
106 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
108 sub read_config ($) {
110 my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
113 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
115 if (!defined($_= <$fh>)) {
116 cfg_fail("read config file $if:\n $!") if $fh->error();
120 s/^\s+//; chomp; s/\s+$//;
124 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
125 @self= split /\s+/, $2;
126 @self_ns= @self if $1 ne '-soa';
127 @self_soa= @self if $1 ne '-ns';
128 } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
129 ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
130 $suffix= '_db' if !length $suffix;
131 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
132 $lprefix= length $prefix; $lsuffix= length $suffix;
133 while ($!=0, $_= readdir D) {
134 next if m/^\./ && !$lprefix;
135 next unless length > $lprefix+$lsuffix;
136 next unless substr($_,0,$lprefix) eq $prefix;
137 next unless substr($_,length($_)-$lsuffix) eq $suffix;
138 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
139 zone_conf($z,'primary',"$dir/$_");
141 $! and cfg_fail("read primary-dir $dir:\n $!");
142 closedir D or cfg_fail("close primary-dir $dir:\n $!");
143 } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
144 zone_conf($1,'primary',qualify($2));
145 } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
146 zone_conf($1,'secondary','',$2);
147 } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
148 zone_conf($1,'stealth','',split /\s+/, $2);
149 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
150 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
151 } elsif (m/^output\s+bind8\+(\S+)$/) {
152 cfg_fail("default output may not apply to only some zones")
153 if @zone_cfg_list && length $default_output;
154 set_output(qualify($1));
155 } elsif (m/^include\s+(\S+)$/) {
158 cfg_fail("unknown configuration directive".
159 " or incorrect syntax or arguments");
162 $fh->close or cfg_fail("close config file $if:\n $!");
167 $i= "$default_dir/$i" unless $i =~ m,^/,;
170 sub zone_conf ($$@) {
171 my ($zone,$style,$file,@servers) = @_;
172 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
174 if (!length $output) {
175 $default_output= qualify('chiark-conf-gen.bind8')
176 unless length $default_output;
177 set_output($default_output);
179 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
180 $zone_cfg{$zone}{'file'}= $file;
181 $zone_cfg{$zone}{'style'}= $style;
182 $zone_cfg{$zone}{'servers'}= [ @servers ];
183 $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
184 $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
185 $zone_cfg{$zone}{'output'}= $output;
186 push @zone_cfg_list, $zone;
192 $output_contents{$output}= '';
196 #-------------------- checking
198 use vars qw($zone $cfg $warnings);
202 return if !$verbosity;
207 return if $verbosity<2;
211 sub process_zones (@) {
215 foreach $zone (@zones) {
216 $cfg= $zone_cfg{$zone} || {
217 'style' => 'foreign',
220 progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
223 if ($localonly && $cfg->{'style'} eq 'foreign') {
224 zone_warning("foreign zone specified with -l");
225 } elsif ($localonly && $cfg->{'style'} ne 'primary') {
231 zone_warning("checks failed: $@") if length $@;
233 zone_output() if $install;
235 print STDERR "$quis: $warnings warnings\n" or die $!
239 sub zone_warning ($) {
243 print STDERR "$zone: warning: $w\n" or die $!;
247 sub zone_warnmore ($) {
248 print STDERR " $_[0]\n" or die $!;
251 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
252 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
253 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
254 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
255 use vars qw(%addr_is_ok);
256 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
257 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
259 sub zone_check_full () {
267 %delgs= %auths= %glue= %soas= %addr_is_ok= ();
268 @to_check= @to_check_soa= ();
271 sub zone_investigate() {
272 my ($super_zone, @super_nsnames,
273 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
274 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
278 debug_trace("zone $zone superzone $super_zone");
279 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
280 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
283 for $super_ns (@super_nsnames) {
284 $super_ns= lc $super_ns;
285 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
286 foreach $addr (@super_ns_addrs) {
289 "$super_ns, server for $super_zone",
294 # We do these in order so that we always do NS RRset checks on
295 # nameservers that came from other NS RRsets first; otherwise
296 # we might set nsrrset_checked due to a glueless_ok check,
297 # and then not check for gluefulness later.
298 debug_dump('@to_check @to_check_soa');
299 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
300 push @to_check_soa, $addr, $wa if $is_auth;
301 next if $nsrrset_checked{$addr}++;
302 zone_check_nsrrset($addr, "[$addr] $wa",
303 $is_auth, $glueless_ok);
304 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
305 next if $soa_checked{$addr}++;
306 zone_check_soa($addr,"[$addr] $wa");
313 sub zone_check_nsrrset ($$$$) {
314 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
315 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
316 verbose("checking delegation by $ww");
318 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
319 $s2g{lc $dig_rdata} = [ ];
320 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
323 "$dig_owner, in glue from $ww",
325 $addr_is_ok{$dig_rdata}= "$dig_owner (NS [$uaddr])"
326 if $cfg->{'style'} eq 'stealth';
327 push @{ $s2g{$dig_owner} }, $dig_rdata;
331 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
332 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
335 @glue= @{ $s2g{$s} };
337 zone_warning("glueless NS $s, from $ww")
338 unless $glueless_ok || !$needglue;
341 $glue= join ' ', sort @glue;
342 push @{ $glue{$s}{$glue} }, $ww;
345 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
346 push @{ $delgs_or_auths->{$s} }, $ww;
349 sub zone_check_soa ($$) {
350 my ($uaddr,$ww) = @_;
351 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
352 verbose("checking service at $ww");
353 $lame= 'dead or lame';
355 if ($dig_type eq 'flags:') {
356 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
357 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
358 die "several SOAs ? $ww" if defined $origin;
360 $got =~ m/^(\S+) \d+/ or die "$got ?";
365 $lame= 'broken' if !$lame && !defined $origin;
366 if ($lame) { zone_warning("$lame server $ww"); return; }
367 push @{ $soas{$got} }, $ww;
368 ($rcode,@soa_addrs)= lookup($origin,'a','0');
369 foreach $soa_addr (@soa_addrs) {
370 $addr_is_ok{$soa_addr}= "$origin (SOA [$uaddr])";
373 "$origin, SOA ORIGIN from $ww";
377 sub zone_consistency() {
378 my ($d, $org_ser, $origin, $a, $h);
379 zone_consistency_set('delegations',\%delgs);
380 foreach $d (keys %delgs) { delete $auths{$d}; }
381 zone_consistency_set('zone nameserver rrset',\%auths);
382 foreach $h (keys %glue) {
383 zone_consistency_set("glue for $h", $glue{$h});
385 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
386 if ($cfg->{'style'} eq 'primary') {
387 foreach $org_ser (keys %soas) {
388 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
390 next if grep { $_ eq $origin } @self_soa;
391 zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
392 " eg from ".((values %{ $soas{$org_ser} })[1]));
397 sub zone_servers_ok () {
401 foreach $a (@{ $cfg->{'servers'} }) {
402 next if exists $addr_is_ok{$a};
403 zone_warning("we slave from $a"); $showok=1;
406 foreach $a (keys %addr_is_ok) {
407 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
413 sub zone_consistency_set ($%) {
416 if (keys(%$set) > 1) {
417 zone_warning("inconsistent $msg:");
418 foreach $d (keys %$set) {
419 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
424 sub zone_check_local () {
426 zone_servers_simplefind();
430 sub zone_servers_simplefind () {
431 my ($rcode,@nsnames,$ns,@soas,$origin);
432 if ($cfg->{'style'} eq 'stealth') {
433 ($rcode,@nsnames)= lookup($zone,'ns-','0');
434 foreach $ns (@nsnames) { zone_server_simple($ns,'NS'); }
436 ($rcode,@soas)= lookup($zone,'soa','0');
437 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
438 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
439 zone_server_simple(domain_canon($1),'SOA');
442 sub zone_server_simple ($$) {
443 my ($name,$why) = @_;
444 my ($rcode,@addrs,$addr);
445 ($rcode,@addrs)= lookup($name,'a','0');
446 foreach $addr (@addrs) { $addr_is_ok{$addr}= "$name ($why)"; }
449 #-------------------- outputting
452 $output_contents{$$cfg{'output'}}.=
460 $$cfg{'style'} eq 'primary' ? 'master' : 'slave',
465 #-------------------- general utilities
469 return unless $debug>1;
470 local $Data::Dumper::Terse=1;
471 foreach $vn (split /\s+/, $_[0]) {
472 print "$vn := ", eval "Dumper(\\$vn)";
476 sub debug_trace ($) {
477 return unless $debug;
482 my ($domain,$type,$okrcodes) = @_;
484 debug_trace("lookup ==> (->$okrcodes) $domain $type");
487 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
489 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
491 die "$quis: exec adnshost:\n $!\n";
493 @result= $h->getlines();
494 $h->error and die "$quis: read from adnshost:\n $!\n";
497 die "$quis: lookup -t$type $domain $okrcodes failed $? $!\n"
498 if $! or $?>6 or index($okrcodes,$?)<0;
499 debug_trace("lookup <== $? @result");
505 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
506 # also pseudo-rr with type `flags:'
507 my ($h,$inmid,$irdata,$c);
510 debug_trace("dig ==> \@$qaddr $qowner $qtype");
513 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
515 open STDERR, ">&STDOUT" or die $!;
517 '+nodef','+nosea','+nodebug','+norecurse',
518 "\@$qaddr",'-t',$qtype,$qowner);
519 die "$quis: exec dig:\n $!\n";
523 if (!defined($_= $h->getline())) {
524 $h->error() and die "$quis: read from dig:\n $!\n";
529 s/^\s+/ / or die "$inmid // $_ ?";
533 s/$/ \(/ unless s/\s*\)\s*$//;
535 if (s/\s*\(\s*$//) { $inmid= $_; next; }
536 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
537 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
538 debug_trace("dig f: $dig_rdata");
542 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
543 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
544 if ($dig_type eq 'a') {
545 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
547 } elsif ($dig_type eq 'ns') {
548 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
549 $dig_rdata= domain_canon($irdata);
550 } elsif ($dig_type eq 'soa') {
551 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
552 or die "bad SOA $irdata ?";
553 $dig_rdata= domain_canon($1).' '.$2;
555 debug_trace("ignoring uknown RR type $dig_type");
558 debug_trace("dig $dig_owner $dig_type $dig_rdata");
561 debug_trace("ignoring unknown dig output $_");
565 debug_trace("dig <== gave $?");
568 sub domain_canon ($) {
571 die "domain $_ ?" unless m/^[0-9a-z]/i;
581 my ($type,$domain) = @_;
582 my (@result)= lookup($type,$domain);
583 @result==1 or die "$quis: lookup -t$type $domain gave more than one RR\n";
588 return unless $check;
590 $soa= lookup1('soa',$zone);
591 $soa_origin=$soa; $soa_origin =~ s/ .*//;
592 $soa_origin_addr= lookup1('a',$soa_origin);
594 @zone_ns= lookup('ns-',$zone);
596 @ok_sources= ($soa_origin_addr);
597 $ok_sources_descr= "SOA ORIGIN $soa_origin [$soa_origin_addr]";
599 if ($style eq 'unoff' || $style eq 'backup') {
600 for $zone_ns (@zone_ns) {
601 @zone_ns_addrs= lookup('a',$zone_ns);
602 push @ok_sources, @zone_ns_addrs;
603 $ok_sources_descr.= ", NS $zone_ns [@zone_ns_addrs]";
607 for $server (@servers) {
608 grep { $server eq $_ } @ok_sources
609 or warn "secondarying from $server which is not ".
610 "$ok_sources_desc\n";
613 if ($style eq 'secondary') {
614 grep { $zone_ns=$_, grep { $myname eq $_ } @mynames } @zone_n
615 or warn "supposedly published secondary but we ".
616 "(@mynames) are not published ($@zone_ns)\n";
623 # $superzone= $zone; $superzone =~ s/^[^\.]+\.//;
624 # @super_ns= lookup('ns-',$zone);
629 for $super_ns (@super_ns) {
631 open DIG, "dig @$super_ns. -t ns +norecurse $zone."
632 or die "$quis: fork for dig:\n $!\n";
642 warning "$myname unlisted NS $nsnames"
648 warning "$myname advertised NS $nsnames"
656 set -e; a="`host -t a \"$ns\".`"; set +e
657 taddrs="`echo \" $a\" | expand | sed -n '
659 s/^[^ ][^ ]* *A *\([0-9][.0-9]*\)/\1/p
661 equlines "A $ns" "$a" "$taddrs"
662 addrs="$addrs $taddrs"
672 for server in $servers
680 if [ "x$addr" = "x$server" ]
687 warning "server $server? but $rectype $names" $addrs
702 checkhostout -val localhost
708 chdir "$base/primary" or die "$quis: chdir $base/primary:\n $!";
709 beginfile('primary.zones');
712 $zone= $f; $zone =~ s/_db$//;
717 zone="`echo $f | sed -e 's/_db$//'`"
726 $currentfile_opened= $install ? "$conf/$currentfile.new" : "/dev/null";
727 open CFF, "> $toopen" or die "$quis: begin $currentfile_opened:\n $!\n";
731 close CFF or die "$quis: close $currentfile_opened:\n $!\n";
732 push @files, $currentfile;
735 sub installfiles () {
736 return unless $install;
737 chdir $conf or die "$quis: chdir $conf:\n $!\n";
739 rename "$f.new", $f or die "$quis: install new $f:\n $!\n";
744 echo >&2 "$zone $style: $*"
745 warnings=$[$warnings+1]
749 if [ "x`echo \" $2\" | wc -l`" != "x`echo \" $3\" | wc -l`" ]
757 hostout="`host $1 \"$zone\" 2>&1 >/dev/null $2 | egrep -v \
758 '^ \!\!\! .* SOA primary .* is not advertised via NS$'`"
760 if [ "x$hostout" = x ]; then return; fi
763 warning "warnings from host:"
772 echo -n "$zone $style " >&2
779 if [ $warnings != 0 ]
781 echo >&2 "$warnings warnings "