9 $debug $needglue $localonly $verbosity);
12 $etcfile= "/etc/bind/chiark-conf-gen.zones";
19 use vars qw($dig_owner $dig_type $dig_rdata);
21 while (@ARGV && $ARGV[0] =~ m/^\-/) {
25 if (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
26 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
27 elsif (m/^glueless$/) { $needglue=0; }
28 elsif (m/^localonly$/) { $localonly=1; }
29 elsif (m/^quiet$/) { $verbosity=0; }
30 elsif (m/^verbose$/) { $verbosity=2; }
31 else { usageerr("unknown option --$_"); }
36 if (s/^[ynf]//) { $mode=$&; }
37 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
38 elsif (s/^D//) { $debug++; }
39 elsif (s/^g//) { $needglue=0; }
40 elsif (s/^l//) { $localonly=1; }
41 elsif (s/^q//) { $verbosity=0; }
42 elsif (s/^v//) { $verbosity=2; }
43 else { usageerr("unknown option -$&"); }
48 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
49 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
51 usageerr("must specify either -f|-y|-n or zones (and not both)")
52 if !!$mode == !!@ARGV;
57 usage: named-conf-regen [-rvq] -f|-y|-n|<zone>...\n".
59 " -f --force install without checking\n".
60 " -y --yes check and install\n".
61 " -n --no check only\n".
62 "additional options:\n".
63 " -q --quiet no output for OK zones\n".
64 " -v --verbose extra verbose\n";
67 cfg_fail("config filename $etcfile should have been absolute path of a file")
68 unless $etcfile =~ m,^/, && $etcfile !~ m,/$,;
70 use vars qw($default_dir);
71 $default_dir= $etcfile;
72 $default_dir =~ s,/[^/]+$,,;
74 use vars qw($slave_dir $slave_prefix $slave_suffix);
79 use vars qw(@self_ns @self_soa);
80 @self_ns= @self_soa= ();
82 use vars qw(%zone_cfg @zone_cfg_list);
86 use vars qw($output $default_output %output_contents);
91 use vars qw($check $install);
92 $check= $mode !~ m/^f/;
93 $install= $mode =~ m/^[yf]/;
95 read_config($etcfile);
96 debug_dump('@zone_cfg_list %zone_cfg');
97 process_zones($mode ? @zone_cfg_list : @ARGV);
98 debug_dump('%output_contents');
100 print STDERR "$0: $warnings warnings\n" if $warnings;
103 #-------------------- configuration reading
105 sub cfg_fail ($) { die "$0: $where:\n $_[0]\n"; }
107 sub read_config ($) {
109 my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
112 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
114 if (!defined($_= <$fh>)) {
115 cfg_fail("read config file $if:\n $!") if $fh->error();
119 s/^\s+//; chomp; s/\s+$//;
123 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
124 @self= split /\s+/, $2;
125 @self_ns= @self if $1 ne '-soa';
126 @self_soa= @self if $1 ne '-ns';
127 } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
128 ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
129 $suffix= '_db' if !length $suffix;
130 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
131 $lprefix= length $prefix; $lsuffix= length $suffix;
132 while ($!=0, $_= readdir D) {
133 next if m/^\./ && !$lprefix;
134 next unless length > $lprefix+$lsuffix;
135 next unless substr($_,0,$lprefix) eq $prefix;
136 next unless substr($_,length($_)-$lsuffix) eq $suffix;
137 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
138 zone_conf($z,'primary',"$dir/$_");
140 $! and cfg_fail("read primary-dir $dir:\n $!");
141 closedir D or cfg_fail("close primary-dir $dir:\n $!");
142 } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
143 zone_conf($1,'primary',qualify($2));
144 } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
145 zone_conf($1,'secondary','',$2);
146 } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
147 zone_conf($1,'stealth','',split /\s+/, $2);
148 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
149 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
150 } elsif (m/^output\s+bind8\+(\S+)$/) {
151 cfg_fail("default output may not apply to only some zones")
152 if @zone_cfg_list && length $default_output;
153 set_output(qualify($1));
154 } elsif (m/^include\s+(\S+)$/) {
157 cfg_fail("unknown configuration directive".
158 " or incorrect syntax or arguments");
161 $fh->close or cfg_fail("close config file $if:\n $!");
166 $i= "$default_dir/$i" unless $i =~ m,^/,;
169 sub zone_conf ($$@) {
170 my ($zone,$style,$file,@servers) = @_;
171 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
173 if (!length $output) {
174 $default_output= qualify('chiark-conf-gen.bind8')
175 unless length $default_output;
176 set_output($default_output);
178 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
179 $zone_cfg{$zone}{'file'}= $file;
180 $zone_cfg{$zone}{'style'}= $style;
181 $zone_cfg{$zone}{'servers'}= [ @servers ];
182 $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
183 $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
184 $zone_cfg{$zone}{'output'}= $output;
185 push @zone_cfg_list, $zone;
191 $output_contents{$output}= '';
195 #-------------------- checking
197 use vars qw($zone $cfg $warnings);
201 return if !$verbosity;
206 return if $verbosity<2;
210 sub process_zones (@) {
214 foreach $zone (@zones) {
215 $cfg= $zone_cfg{$zone} || {
216 'style' => 'foreign',
219 progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
222 if ($localonly && $cfg->{'style'} eq 'foreign') {
223 zone_warning("foreign zone specified with -l");
224 } elsif ($localonly && $cfg->{'style'} ne 'primary') {
230 zone_warning("checks failed: $@") if length $@;
232 zone_output() if $install;
236 sub zone_warning ($) {
240 print STDERR "$zone: warning: $w\n" or die $!;
244 sub zone_warnmore ($) {
245 print STDERR " $_[0]\n" or die $!;
248 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
249 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
250 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
251 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
252 use vars qw(%addr_is_ok);
253 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
254 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
256 sub zone_check_full () {
264 %delgs= %auths= %glue= %soas= %addr_is_ok= ();
265 @to_check= @to_check_soa= ();
268 sub zone_investigate() {
269 my ($super_zone, @super_nsnames,
270 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
271 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
275 debug_trace("zone $zone superzone $super_zone");
276 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
277 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
280 for $super_ns (@super_nsnames) {
281 $super_ns= lc $super_ns;
282 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
283 foreach $addr (@super_ns_addrs) {
286 "$super_ns, server for $super_zone",
291 # We do these in order so that we always do NS RRset checks on
292 # nameservers that came from other NS RRsets first; otherwise
293 # we might set nsrrset_checked due to a glueless_ok check,
294 # and then not check for gluefulness later.
295 debug_dump('@to_check @to_check_soa');
296 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
297 push @to_check_soa, $addr, $wa if $is_auth;
298 next if $nsrrset_checked{$addr}++;
299 zone_check_nsrrset($addr, "[$addr] $wa",
300 $is_auth, $glueless_ok);
301 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
302 next if $soa_checked{$addr}++;
303 zone_check_soa($addr,"[$addr] $wa");
310 sub zone_check_nsrrset ($$$$) {
311 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
312 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
313 verbose("checking delegation by $ww");
315 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
316 $s2g{lc $dig_rdata} = [ ];
317 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
320 "$dig_owner, in glue from $ww",
322 $addr_is_ok{$dig_rdata}= "$dig_owner (NS [$uaddr])"
323 if $cfg->{'style'} eq 'stealth';
324 push @{ $s2g{$dig_owner} }, $dig_rdata;
328 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
329 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
332 @glue= @{ $s2g{$s} };
334 zone_warning("glueless NS $s, from $ww")
335 unless $glueless_ok || !$needglue;
338 $glue= join ' ', sort @glue;
339 push @{ $glue{$s}{$glue} }, $ww;
342 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
343 push @{ $delgs_or_auths->{$s} }, $ww;
346 sub zone_check_soa ($$) {
347 my ($uaddr,$ww) = @_;
348 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
349 verbose("checking service at $ww");
350 $lame= 'dead or lame';
352 if ($dig_type eq 'flags:') {
353 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
354 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
355 die "several SOAs ? $ww" if defined $origin;
357 $got =~ m/^(\S+) \d+/ or die "$got ?";
362 $lame= 'broken' if !$lame && !defined $origin;
363 if ($lame) { zone_warning("$lame server $ww"); return; }
364 push @{ $soas{$got} }, $ww;
365 ($rcode,@soa_addrs)= lookup($origin,'a','0');
366 foreach $soa_addr (@soa_addrs) {
367 $addr_is_ok{$soa_addr}= "$origin (SOA [$uaddr])";
370 "$origin, SOA ORIGIN from $ww";
374 sub zone_consistency() {
375 my ($d, $org_ser, $origin, $a, $h);
376 zone_consistency_set('delegations',\%delgs);
377 foreach $d (keys %delgs) { delete $auths{$d}; }
378 zone_consistency_set('zone nameserver rrset',\%auths);
379 foreach $h (keys %glue) {
380 zone_consistency_set("glue for $h", $glue{$h});
382 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
383 if ($cfg->{'style'} eq 'primary') {
384 foreach $org_ser (keys %soas) {
385 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
387 next if grep { $_ eq $origin } @self_soa;
388 zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
389 " eg from ".((values %{ $soas{$org_ser} })[1]));
394 sub zone_servers_ok () {
398 foreach $a (@{ $cfg->{'servers'} }) {
399 next if exists $addr_is_ok{$a};
400 zone_warning("we slave from $a"); $showok=1;
403 foreach $a (keys %addr_is_ok) {
404 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
410 sub zone_consistency_set ($%) {
413 if (keys(%$set) > 1) {
414 zone_warning("inconsistent $msg:");
415 foreach $d (keys %$set) {
416 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
421 sub zone_check_local () {
423 zone_servers_simplefind();
427 sub zone_servers_simplefind () {
428 my ($rcode,@nsnames,$ns,@soas,$origin);
429 if ($cfg->{'style'} eq 'stealth') {
430 ($rcode,@nsnames)= lookup($zone,'ns-','0');
431 foreach $ns (@nsnames) { zone_server_simple($ns,'NS'); }
433 ($rcode,@soas)= lookup($zone,'soa','0');
434 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
435 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
436 zone_server_simple(domain_canon($1),'SOA');
439 sub zone_server_simple ($$) {
440 my ($name,$why) = @_;
441 my ($rcode,@addrs,$addr);
442 ($rcode,@addrs)= lookup($name,'a','0');
443 foreach $addr (@addrs) { $addr_is_ok{$addr}= "$name ($why)"; }
446 #-------------------- outputting
449 $output_contents{$$cfg{'output'}}.=
457 $$cfg{'style'} eq 'primary' ? 'master' : 'slave',
462 #-------------------- general utilities
466 return unless $debug>1;
467 local $Data::Dumper::Terse=1;
468 foreach $vn (split /\s+/, $_[0]) {
469 print "$vn := ", eval "Dumper(\\$vn)";
473 sub debug_trace ($) {
474 return unless $debug;
479 my ($domain,$type,$okrcodes) = @_;
481 debug_trace("lookup ==> (->$okrcodes) $domain $type");
484 defined($c= open $h, "-|") or die "$0: fork adnshost:\n $!\n";
486 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
488 die "$0: exec adnshost:\n $!\n";
490 @result= $h->getlines();
491 $h->error and die "$0: read from adnshost:\n $!\n";
494 die "$0: lookup -t$type $domain $okrcodes failed $? $!\n"
495 if $! or $?>6 or index($okrcodes,$?)<0;
496 debug_trace("lookup <== $? @result");
502 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
503 # also pseudo-rr with type `flags:'
504 my ($h,$inmid,$irdata,$c);
507 debug_trace("dig ==> \@$qaddr $qowner $qtype");
510 defined($c= open $h, "-|") or die "$0: fork dig:\n $!\n";
512 open STDERR, ">&STDOUT" or die $!;
514 '+nodef','+nosea','+nodebug','+norecurse',
515 "\@$qaddr",'-t',$qtype,$qowner);
516 die "$0: exec dig:\n $!\n";
520 if (!defined($_= $h->getline())) {
521 $h->error() and die "$0: read from dig:\n $!\n";
526 s/^\s+/ / or die "$inmid // $_ ?";
530 s/$/ \(/ unless s/\s*\)\s*$//;
532 if (s/\s*\(\s*$//) { $inmid= $_; next; }
533 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
534 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
535 debug_trace("dig f: $dig_rdata");
539 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
540 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
541 if ($dig_type eq 'a') {
542 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
544 } elsif ($dig_type eq 'ns') {
545 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
546 $dig_rdata= domain_canon($irdata);
547 } elsif ($dig_type eq 'soa') {
548 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
549 or die "bad SOA $irdata ?";
550 $dig_rdata= domain_canon($1).' '.$2;
552 debug_trace("ignoring uknown RR type $dig_type");
555 debug_trace("dig $dig_owner $dig_type $dig_rdata");
558 debug_trace("ignoring unknown dig output $_");
562 debug_trace("dig <== gave $?");
565 sub domain_canon ($) {
568 die "domain $_ ?" unless m/^[0-9a-z]/i;
578 my ($type,$domain) = @_;
579 my (@result)= lookup($type,$domain);
580 @result==1 or die "$0: lookup -t$type $domain gave more than one RR\n";
585 return unless $check;
587 $soa= lookup1('soa',$zone);
588 $soa_origin=$soa; $soa_origin =~ s/ .*//;
589 $soa_origin_addr= lookup1('a',$soa_origin);
591 @zone_ns= lookup('ns-',$zone);
593 @ok_sources= ($soa_origin_addr);
594 $ok_sources_descr= "SOA ORIGIN $soa_origin [$soa_origin_addr]";
596 if ($style eq 'unoff' || $style eq 'backup') {
597 for $zone_ns (@zone_ns) {
598 @zone_ns_addrs= lookup('a',$zone_ns);
599 push @ok_sources, @zone_ns_addrs;
600 $ok_sources_descr.= ", NS $zone_ns [@zone_ns_addrs]";
604 for $server (@servers) {
605 grep { $server eq $_ } @ok_sources
606 or warn "secondarying from $server which is not ".
607 "$ok_sources_desc\n";
610 if ($style eq 'secondary') {
611 grep { $zone_ns=$_, grep { $myname eq $_ } @mynames } @zone_n
612 or warn "supposedly published secondary but we ".
613 "(@mynames) are not published ($@zone_ns)\n";
620 # $superzone= $zone; $superzone =~ s/^[^\.]+\.//;
621 # @super_ns= lookup('ns-',$zone);
626 for $super_ns (@super_ns) {
628 open DIG, "dig @$super_ns. -t ns +norecurse $zone."
629 or die "$0: fork for dig:\n $!\n";
639 warning "$myname unlisted NS $nsnames"
645 warning "$myname advertised NS $nsnames"
653 set -e; a="`host -t a \"$ns\".`"; set +e
654 taddrs="`echo \" $a\" | expand | sed -n '
656 s/^[^ ][^ ]* *A *\([0-9][.0-9]*\)/\1/p
658 equlines "A $ns" "$a" "$taddrs"
659 addrs="$addrs $taddrs"
669 for server in $servers
677 if [ "x$addr" = "x$server" ]
684 warning "server $server? but $rectype $names" $addrs
699 checkhostout -val localhost
705 chdir "$base/primary" or die "$0: chdir $base/primary:\n $!";
706 beginfile('primary.zones');
709 $zone= $f; $zone =~ s/_db$//;
714 zone="`echo $f | sed -e 's/_db$//'`"
723 $currentfile_opened= $install ? "$conf/$currentfile.new" : "/dev/null";
724 open CFF, "> $toopen" or die "$0: begin $currentfile_opened:\n $!\n";
728 close CFF or die "$0: close $currentfile_opened:\n $!\n";
729 push @files, $currentfile;
732 sub installfiles () {
733 return unless $install;
734 chdir $conf or die "$0: chdir $conf:\n $!\n";
736 rename "$f.new", $f or die "$0: install new $f:\n $!\n";
741 echo >&2 "$zone $style: $*"
742 warnings=$[$warnings+1]
746 if [ "x`echo \" $2\" | wc -l`" != "x`echo \" $3\" | wc -l`" ]
754 hostout="`host $1 \"$zone\" 2>&1 >/dev/null $2 | egrep -v \
755 '^ \!\!\! .* SOA primary .* is not advertised via NS$'`"
757 if [ "x$hostout" = x ]; then return; fi
760 warning "warnings from host:"
769 echo -n "$zone $style " >&2
776 if [ $warnings != 0 ]
778 echo >&2 "$warnings warnings "