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(); $where= '--config option'; }
29 elsif (m/^glueless$/) { $needglue--; }
30 elsif (m/^localonly$/) { $localonly=1; }
31 elsif (m/^quiet$/) { $verbosity=0; }
32 elsif (m/^verbose$/) { $verbosity=2; }
33 else { usageerr("unknown option --$_"); }
38 if (s/^[ynf]//) { $mode=$&; }
39 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
40 elsif (s/^D//) { $debug++; }
41 elsif (s/^g//) { $needglue--; }
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("-g may be specified at most twice") if $needglue<0;
54 usageerr("-D may be specified at most twice") if $debug>2;
55 usageerr("must specify either -f|-y|-n or zones (and not both)")
56 if !!$mode == !!@ARGV;
61 usage: named-conf-regen [-rvq] -f|-y|-n|<zone>...\n".
63 " -f --force install without checking\n".
64 " -y --yes check and install\n".
65 " -n --no check only\n".
66 "additional options:\n".
67 " -q --quiet no output for OK zones\n".
68 " -v --verbose extra verbose\n";
71 cfg_fail("config filename $etcfile should have been absolute path of a file")
72 unless $etcfile =~ m,^/, && $etcfile !~ m,/$,;
74 use vars qw($default_dir);
75 $default_dir= $etcfile;
76 $default_dir =~ s,/[^/]+$,,;
78 use vars qw($slave_dir $slave_prefix $slave_suffix);
83 use vars qw(@self_ns @self_soa);
84 @self_ns= @self_soa= ();
86 use vars qw(%zone_cfg @zone_cfg_list);
90 use vars qw($output $default_output %output_contents);
95 use vars qw($check $install);
96 $check= $mode !~ m/^f/;
97 $install= $mode =~ m/^[yf]/;
99 read_config($etcfile);
100 debug_dump('@zone_cfg_list %zone_cfg');
101 process_zones($mode ? @zone_cfg_list : @ARGV);
102 debug_dump('%output_contents');
106 #-------------------- configuration reading
108 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
110 sub read_config ($) {
112 my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
115 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
117 if (!defined($_= <$fh>)) {
118 cfg_fail("read config file $if:\n $!") if $fh->error();
122 s/^\s+//; chomp; s/\s+$//;
126 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
127 @self= split /\s+/, $2;
128 @self_ns= @self if $1 ne '-soa';
129 @self_soa= @self if $1 ne '-ns';
130 } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))?:\s+(\S+))?$/) {
131 ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
132 $suffix= '_db' if !defined $suffix;
133 $prefix= '' if !defined $prefix;
134 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
135 $lprefix= length $prefix; $lsuffix= length $suffix;
136 while (defined($_= readdir D)) {
137 next if m/^\./ && !$lprefix;
138 next unless length > $lprefix+$lsuffix;
139 next unless substr($_,0,$lprefix) eq $prefix;
140 next unless substr($_,length($_)-$lsuffix) eq $suffix;
141 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
142 zone_conf($z,'primary',"$dir/$_");
144 closedir D or cfg_fail("close primary-dir $dir:\n $!");
145 } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
146 zone_conf($1,'primary',qualify($2));
147 } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
148 zone_conf($1,'secondary','',$2);
149 } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
150 zone_conf($1,'stealth','',split /\s+/, $2);
151 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))?:\s+(\S+))?$/) {
152 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
153 } elsif (m/^output\s+bind8\+(\S+)$/) {
154 cfg_fail("default output may not apply to only some zones")
155 if @zone_cfg_list && length $default_output;
156 set_output(qualify($1));
157 } elsif (m/^include\s+(\S+)$/) {
160 cfg_fail("unknown configuration directive".
161 " or incorrect syntax or arguments");
164 $fh->close or cfg_fail("close config file $if:\n $!");
169 $i= "$default_dir/$i" unless $i =~ m,^/,;
173 sub zone_conf ($$@) {
174 my ($zone,$style,$file,@servers) = @_;
175 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
177 if (!length $output) {
178 $default_output= qualify('chiark-conf-gen.bind8')
179 unless length $default_output;
180 set_output($default_output);
182 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
183 $zone_cfg{$zone}{'file'}= $file;
184 $zone_cfg{$zone}{'style'}= $style;
185 $zone_cfg{$zone}{'servers'}= [ @servers ];
186 $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
187 $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
188 $zone_cfg{$zone}{'output'}= $output;
189 push @zone_cfg_list, $zone;
195 $output_contents{$output}= '';
199 #-------------------- checking
201 use vars qw($zone $cfg $warnings);
205 return if !$verbosity;
210 return if $verbosity<2;
214 sub process_zones (@) {
218 foreach $zone (@zones) {
219 $cfg= $zone_cfg{$zone} || {
220 'style' => 'foreign',
223 progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
226 if ($localonly && $cfg->{'style'} eq 'foreign') {
227 zone_warning("foreign zone specified with -l");
228 } elsif ($localonly && $cfg->{'style'} ne 'primary') {
234 zone_warning("checks failed: $@") if length $@;
236 zone_output() if $install;
238 print STDERR "$quis: $warnings warnings\n" or die $!
242 sub zone_warning ($) {
246 print STDERR "$zone: warning: $w\n" or die $!;
250 sub zone_warnmore ($) {
251 print STDERR " $_[0]\n" or die $!;
254 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
255 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
256 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
257 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
258 use vars qw(%addr_is_ok %gluelesswarned);
259 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
260 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
262 sub zone_check_full () {
270 %delgs= %auths= %glue= %soas= %gluelesswarned= %addr_is_ok= ();
271 @to_check= @to_check_soa= ();
274 sub zone_investigate() {
275 my ($super_zone, @super_nsnames,
276 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
277 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
281 debug_trace("zone $zone superzone $super_zone");
282 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
283 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
286 for $super_ns (@super_nsnames) {
287 $super_ns= lc $super_ns;
288 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
289 foreach $addr (@super_ns_addrs) {
292 "$super_ns, server for $super_zone",
297 # We do these in order so that we always do NS RRset checks on
298 # nameservers that came from other NS RRsets first; otherwise
299 # we might set nsrrset_checked due to a glueless_ok check,
300 # and then not check for gluefulness later.
301 debug_dump('@to_check @to_check_soa');
302 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
303 push @to_check_soa, $addr, $wa if $is_auth;
304 next if $nsrrset_checked{$addr}++;
305 zone_check_nsrrset($addr, "[$addr] $wa",
306 $is_auth, $glueless_ok);
307 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
308 next if $soa_checked{$addr}++;
309 zone_check_soa($addr,"[$addr] $wa");
316 sub zone_check_nsrrset ($$$$) {
317 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
318 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
319 verbose("checking delegation by $ww");
321 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
322 $s2g{lc $dig_rdata} = [ ];
323 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
326 "$dig_owner, in glue from $ww",
328 $addr_is_ok{$dig_rdata}= "$dig_owner (NS [$uaddr])"
329 if $cfg->{'style'} eq 'stealth';
330 push @{ $s2g{$dig_owner} }, $dig_rdata;
334 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
335 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
338 @glue= @{ $s2g{$s} };
340 zone_warning("glueless NS $s,".
341 ($needglue<=1 ? " (eg)" : "").
343 unless $glueless_ok || !$needglue ||
344 ($needglue<=1 && $gluelesswarned{$s}++);
347 $glue= join ' ', sort @glue;
348 push @{ $glue{$s}{$glue} }, $ww;
351 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
352 push @{ $delgs_or_auths->{$s} }, $ww;
355 sub zone_check_soa ($$) {
356 my ($uaddr,$ww) = @_;
357 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
358 verbose("checking service at $ww");
359 $lame= 'dead or lame';
361 if ($dig_type eq 'flags:') {
362 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
363 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
364 die "several SOAs ? $ww" if defined $origin;
366 $got =~ m/^(\S+) \d+/ or die "$got ?";
371 $lame= 'broken' if !$lame && !defined $origin;
372 if ($lame) { zone_warning("$lame server $ww"); return; }
373 push @{ $soas{$got} }, $ww;
374 ($rcode,@soa_addrs)= lookup($origin,'a','0');
375 foreach $soa_addr (@soa_addrs) {
376 $addr_is_ok{$soa_addr}= "$origin (SOA [$uaddr])";
379 "$origin, SOA ORIGIN from $ww";
383 sub zone_consistency() {
384 my ($d, $org_ser, $origin, $a, $h);
385 zone_consistency_set('delegations',\%delgs);
386 foreach $d (keys %delgs) { delete $auths{$d}; }
387 zone_consistency_set('zone nameserver rrset',\%auths);
388 foreach $h (keys %glue) {
389 zone_consistency_set("glue for $h", $glue{$h});
391 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
392 if ($cfg->{'style'} eq 'primary') {
393 foreach $org_ser (keys %soas) {
394 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
396 next if grep { $_ eq $origin } @self_soa;
397 zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
398 " eg from ".((values %{ $soas{$org_ser} })[1]));
403 sub zone_servers_ok () {
407 foreach $a (@{ $cfg->{'servers'} }) {
408 next if exists $addr_is_ok{$a};
409 zone_warning("we slave from $a"); $showok=1;
412 foreach $a (keys %addr_is_ok) {
413 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
419 sub zone_consistency_set ($%) {
422 if (keys(%$set) > 1) {
423 zone_warning("inconsistent $msg:");
424 foreach $d (keys %$set) {
425 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
430 sub zone_check_local () {
432 zone_servers_simplefind();
436 sub zone_servers_simplefind () {
437 my ($rcode,@nsnames,$ns,@soas,$origin);
438 if ($cfg->{'style'} eq 'stealth') {
439 ($rcode,@nsnames)= lookup($zone,'ns-','0');
440 foreach $ns (@nsnames) { zone_server_simple($ns,'NS'); }
442 ($rcode,@soas)= lookup($zone,'soa','0');
443 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
444 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
445 zone_server_simple(domain_canon($1),'SOA');
448 sub zone_server_simple ($$) {
449 my ($name,$why) = @_;
450 my ($rcode,@addrs,$addr);
451 ($rcode,@addrs)= lookup($name,'a','0');
452 foreach $addr (@addrs) { $addr_is_ok{$addr}= "$name ($why)"; }
455 #-------------------- outputting
458 $output_contents{$$cfg{'output'}}.=
466 $$cfg{'style'} eq 'primary' ? 'master' : 'slave',
471 #-------------------- general utilities
475 return unless $debug>1;
476 local $Data::Dumper::Terse=1;
477 foreach $vn (split /\s+/, $_[0]) {
478 print "$vn := ", eval "Dumper(\\$vn)";
482 sub debug_trace ($) {
483 return unless $debug;
488 my ($domain,$type,$okrcodes) = @_;
490 debug_trace("lookup ==> (->$okrcodes) $domain $type");
493 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
495 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
497 die "$quis: exec adnshost:\n $!\n";
499 @result= $h->getlines();
500 $h->error and die "$quis: read from adnshost:\n $!\n";
503 die "$quis: lookup -t$type $domain $okrcodes failed $? $!\n"
504 if $! or $?>6 or index($okrcodes,$?)<0;
505 debug_trace("lookup <== $? @result");
511 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
512 # also pseudo-rr with type `flags:'
513 my ($h,$inmid,$irdata,$c);
516 debug_trace("dig ==> \@$qaddr $qowner $qtype");
519 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
521 open STDERR, ">&STDOUT" or die $!;
523 '+nodef','+nosea','+nodebug','+norecurse',
524 "\@$qaddr",'-t',$qtype,$qowner);
525 die "$quis: exec dig:\n $!\n";
529 if (!defined($_= $h->getline())) {
530 $h->error() and die "$quis: read from dig:\n $!\n";
535 s/^\s+/ / or die "$inmid // $_ ?";
539 s/$/ \(/ unless s/\s*\)\s*$//;
541 if (s/\s*\(\s*$//) { $inmid= $_; next; }
542 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
543 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
544 debug_trace("dig f: $dig_rdata");
548 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
549 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
550 if ($dig_type eq 'a') {
551 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
553 } elsif ($dig_type eq 'ns') {
554 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
555 $dig_rdata= domain_canon($irdata);
556 } elsif ($dig_type eq 'soa') {
557 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
558 or die "bad SOA $irdata ?";
559 $dig_rdata= domain_canon($1).' '.$2;
561 debug_trace("ignoring uknown RR type $dig_type");
564 debug_trace("dig $dig_owner $dig_type $dig_rdata");
567 debug_trace("ignoring unknown dig output $_");
571 debug_trace("dig <== gave $?");
574 sub domain_canon ($) {
577 die "domain $_ ?" unless m/^[0-9a-z]/i;
587 my ($type,$domain) = @_;
588 my (@result)= lookup($type,$domain);
589 @result==1 or die "$quis: lookup -t$type $domain gave more than one RR\n";
594 return unless $check;
596 $soa= lookup1('soa',$zone);
597 $soa_origin=$soa; $soa_origin =~ s/ .*//;
598 $soa_origin_addr= lookup1('a',$soa_origin);
600 @zone_ns= lookup('ns-',$zone);
602 @ok_sources= ($soa_origin_addr);
603 $ok_sources_descr= "SOA ORIGIN $soa_origin [$soa_origin_addr]";
605 if ($style eq 'unoff' || $style eq 'backup') {
606 for $zone_ns (@zone_ns) {
607 @zone_ns_addrs= lookup('a',$zone_ns);
608 push @ok_sources, @zone_ns_addrs;
609 $ok_sources_descr.= ", NS $zone_ns [@zone_ns_addrs]";
613 for $server (@servers) {
614 grep { $server eq $_ } @ok_sources
615 or warn "secondarying from $server which is not ".
616 "$ok_sources_desc\n";
619 if ($style eq 'secondary') {
620 grep { $zone_ns=$_, grep { $myname eq $_ } @mynames } @zone_n
621 or warn "supposedly published secondary but we ".
622 "(@mynames) are not published ($@zone_ns)\n";
629 # $superzone= $zone; $superzone =~ s/^[^\.]+\.//;
630 # @super_ns= lookup('ns-',$zone);
635 for $super_ns (@super_ns) {
637 open DIG, "dig @$super_ns. -t ns +norecurse $zone."
638 or die "$quis: fork for dig:\n $!\n";
648 warning "$myname unlisted NS $nsnames"
654 warning "$myname advertised NS $nsnames"
662 set -e; a="`host -t a \"$ns\".`"; set +e
663 taddrs="`echo \" $a\" | expand | sed -n '
665 s/^[^ ][^ ]* *A *\([0-9][.0-9]*\)/\1/p
667 equlines "A $ns" "$a" "$taddrs"
668 addrs="$addrs $taddrs"
678 for server in $servers
686 if [ "x$addr" = "x$server" ]
693 warning "server $server? but $rectype $names" $addrs
708 checkhostout -val localhost
714 chdir "$base/primary" or die "$quis: chdir $base/primary:\n $!";
715 beginfile('primary.zones');
718 $zone= $f; $zone =~ s/_db$//;
723 zone="`echo $f | sed -e 's/_db$//'`"
732 $currentfile_opened= $install ? "$conf/$currentfile.new" : "/dev/null";
733 open CFF, "> $toopen" or die "$quis: begin $currentfile_opened:\n $!\n";
737 close CFF or die "$quis: close $currentfile_opened:\n $!\n";
738 push @files, $currentfile;
741 sub installfiles () {
742 return unless $install;
743 chdir $conf or die "$quis: chdir $conf:\n $!\n";
745 rename "$f.new", $f or die "$quis: install new $f:\n $!\n";
750 echo >&2 "$zone $style: $*"
751 warnings=$[$warnings+1]
755 if [ "x`echo \" $2\" | wc -l`" != "x`echo \" $3\" | wc -l`" ]
763 hostout="`host $1 \"$zone\" 2>&1 >/dev/null $2 | egrep -v \
764 '^ \!\!\! .* SOA primary .* is not advertised via NS$'`"
766 if [ "x$hostout" = x ]; then return; fi
769 warning "warnings from host:"
778 echo -n "$zone $style " >&2
785 if [ $warnings != 0 ]
787 echo >&2 "$warnings warnings "