7 use vars qw($etcfile $where);
8 $etcfile= "/etc/bind/chiark-conf-gen.zones";
11 use vars qw($mode $verbosity $debug);
16 while (@ARGV && $ARGV[0] =~ m/^\-/) {
20 if (m/^quiet$/) { $verbosity=0; }
21 elsif (m/^verbose$/) { $verbosity=2; }
22 elsif (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
23 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
24 else { usageerr("unknown option --$_"); }
29 if (s/^[ynf]//) { $mode=$&; }
30 elsif (s/^v//) { $verbosity=2; }
31 elsif (s/^q//) { $verbosity=0; }
32 elsif (s/^D//) { $debug=1; }
33 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
34 else { usageerr("unknown option -$&"); }
39 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
40 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
42 usageerr("must specify either -f|-y|-n or zones (and not both)")
43 if !!$mode == !!@ARGV;
48 usage: named-conf-regen [-rvq] -f|-y|-n|<zone>...\n".
50 " -f --force install without checking\n".
51 " -y --yes check and install\n".
52 " -n --no check only\n".
53 "additional options:\n".
54 " -q --quiet no output for OK zones\n".
55 " -v --verbose extra verbose\n";
58 cfg_fail("config filename $etcfile should have been absolute path of a file")
59 unless $etcfile =~ m,^/, && $etcfile !~ m,/$,;
61 use vars qw($default_dir);
62 $default_dir= $etcfile;
63 $default_dir =~ s,/[^/]+$,,;
65 use vars qw($slave_dir $slave_prefix $slave_suffix);
70 use vars qw(@self_ns @self_soa);
71 @self_ns= @self_soa= ();
73 use vars qw(%zone_cfg @zone_cfg_list);
77 use vars qw($output $default_output %output_contents);
82 use vars qw($check $install);
83 $check= $mode !~ m/^n/;
84 $install= $mode =~ m/^[yf]/;
86 read_config($etcfile);
87 debug_dump('@zone_cfg_list %zone_cfg');
88 process_zones($mode ? @zone_cfg_list : @ARGV);
89 debug_dump('%output_contents');
92 #-------------------- configuration reading
94 sub cfg_fail ($) { die "$0: $where:\n $_[0]\n"; }
98 my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
101 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
103 if (!defined($_= <$fh>)) {
104 cfg_fail("read config file $if:\n $!") if $fh->error();
108 s/^\s+//; chomp; s/\s+$//;
112 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
113 @self= split /\s+/, $2;
114 @self_ns= @self if $1 ne '-soa';
115 @self_soa= @self if $1 ne '-ns';
116 } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
117 ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
118 $suffix= '_db' if !length $suffix;
119 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
120 $lprefix= length $prefix; $lsuffix= length $suffix;
121 while ($!=0, $_= readdir D) {
122 next if m/^\./ && !$lprefix;
123 next unless length > $lprefix+$lsuffix;
124 next unless substr($_,0,$lprefix) eq $prefix;
125 next unless substr($_,length($_)-$lsuffix) eq $suffix;
126 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
127 zone_conf($z,'primary',"$dir/$_");
129 $! and cfg_fail("read primary-dir $dir:\n $!");
130 closedir D or cfg_fail("close primary-dir $dir:\n $!");
131 } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
132 zone_conf($1,'primary',qualify($2));
133 } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
134 zone_conf($1,'secondary','',$2);
135 } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
136 zone_conf($1,'stealth','',split /\s+/, $2);
137 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
138 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
139 } elsif (m/^output\s+bind8\+(\S+)$/) {
140 cfg_fail("default output may not apply to only some zones")
141 if @zone_cfg_list && length $default_output;
142 set_output(qualify($1));
143 } elsif (m/^include\s+(\S+)$/) {
146 cfg_fail("unknown configuration directive".
147 " or incorrect syntax or arguments");
150 $fh->close or cfg_fail("close config file $if:\n $!");
155 $i= "$default_dir/$i" unless $i =~ m,^/,;
158 sub zone_conf ($$@) {
159 my ($zone,$style,$file,@servers) = @_;
160 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
162 if (!length $output) {
163 $default_output= qualify('chiark-conf-gen.bind8')
164 unless length $default_output;
165 set_output($default_output);
167 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
168 $zone_cfg{$zone}{'file'}= $file;
169 $zone_cfg{$zone}{'style'}= $style;
170 $zone_cfg{$zone}{'servers'}= [ @servers ];
171 $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
172 $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
173 $zone_cfg{$zone}{'output'}= $output;
174 push @zone_cfg_list, $zone;
180 $output_contents{$output}= '';
184 #-------------------- checking
186 use vars qw($zone $cfg $warnings);
190 return if !$verbosity;
194 sub process_zones (@) {
198 foreach $zone (@zones) {
199 $cfg= $zone_cfg{$zone} || {
200 'style' => 'foreign',
203 progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
205 eval { zone_check() };
206 zone_warning("checks failed: $@") if length $@;
208 zone_output() if $install;
212 sub zone_warning ($) {
216 print STDERR "$zone: warning: $w\n" or die $!;
220 sub zone_warnmore ($) {
221 print STDERR " $_[0]\n" or die $!;
224 use vars qw(%delgs # $delgs{$nameserver_list} = [ $whosaidandwhy ]
225 %auths # $auths{$nameserver_list} = [ $whosaidandwhy ]
226 %glue # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
227 %soas # $soa{"$origin $serial"} = [ $whosaidandwhy ]
228 @to_check # ($addr,$whyask,\%delgs_or_auths,$glueless_ok, ...)
229 @to_check_soa # ($addr,$whyask, ...)
234 my ($super_zone, @super_nsnames,
235 $super_ns, @super_ns_addrs, $super_ns_addr, $s, $wa, $zcr,
236 %nsrrset_checked, %soa_checked);
238 %delgs= %auths= %glue= ();
239 @to_check= @to_check_soa= ();
243 debug_trace("zone $zone superzone $super_zone");
244 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
245 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
248 for $super_ns (@super_nsnames) {
249 $super_ns= lc $super_ns;
250 ($rcode,@this_ns_addrs)= lookup($super_ns,'a','0');
251 foreach $super_ns_addr (@this_ns_addrs) {
254 "addr for $super_ns, server for $super_zone, parent"
259 # We do these in order so that we always do NS RRset checks on
260 # nameservers that came from other NS RRsets first; otherwise
261 # we might set nsrrset_checked due to a glueless_ok check,
262 # and then not check for gluefulness later.
263 if (($addr,$wa,$nsrrset_ref,$glueless_ok,@to_check) = @to_check) {
264 next if $nsrrset_checked{$ns}++;
265 push @to_check_soa, $addr, $why;
266 zone_check_nsrrset($super_ns_addr,"$addr, $wa",
267 %$delgs_or_auths,$glueless_ok);
268 } elsif (($addr,$wa) = @to_check_soa) {
269 next if !$soa_checked{$ns}++;
270 zone_check_soa($addr,"$addr, $wa");
276 sub zone_consistency() {
277 my ($d, $org_ser, $origin, $a, $showok);
278 zone_consistency_set('delegations',%delgs);
279 foreach $d (keys %delgs) { delete $auths{$d}; }
280 zone_consistency_set('zone nameserver rrset',%auths);
281 foreach $h (keys %glue) {
282 zone_consistency_set("glue for $h", %{ $glue{$h} });
284 zone_consistency_set("SOA ORIGIN and SERIAL",%soas);
285 if ($cfg->{'style'} eq 'primary') {
286 foreach $org_ser (keys %soas) {
287 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
289 next if grep { $_ eq $origin } @self_soa;
290 zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
291 " eg from ".((values %{ $soas{$org_ser} })[1]));
295 foreach $a (@{ $cfg->{'servers'} }) {
296 next if $addr_is_ok{$a};
297 zone_warning("we slave from $a"); $showok=1;
300 zone_warnmore("we must slave from one of ".
301 join ' ', keys %addr_is_ok);
305 sub zone_consistency_set ($\%) {
308 if (keys(%$set) != 1) {
309 zone_warning("inconsistent $msg:");
310 foreach $d (keys %$set) {
311 foreach $o (@$d) { zone_warnmore(" $d from $o"); }
316 sub zone_check_soa ($$) {
317 my ($uaddr,$ww) = @_;
318 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
319 $lame= 'dead or lame';
321 if ($dig::type eq 'flags:') {
322 $lame= $dig::rdata =~ m/ aa / ? 'lame' : '';
323 } elsif ($dig::type eq 'soa' && $dig::owner eq $zone && !$lame) {
324 die "several SOAs ? $why" if defined $origin;
326 $got =~ m/^(\S+) \d+/ or die "$got ?";
331 $lame= 'broken' if !$lame && !defined $origin;
332 if ($lame) { zone_warning("$lame server $ww"); return; }
333 push @{ $soas{$got} }, $why;
334 ($rcode,@soa_addrs)= lookup($origin,'a','0');
335 foreach $soa_addr (@soa_addrs) {
336 $addr_is_ok{$soa_addr}= 1;
339 "addr for $origin, SOA ORIGIN from $why";
343 sub zone_check_nsrrset ($$\%\%) {
344 my ($uaddr,$ww, $delgs_or_auths,$glueless_ok) = @_;
345 my (@s, $s, %s2g, @glue, $glue);
347 if ($dig::type eq 'ns' && $dig::owner eq $zone) {
348 $s2g{lc $dig::rdata} = [ ];
349 } elsif ($dig::type eq 'a' && exists $s2g{$dig::owner}) {
352 "glue for $dig::owner, from (eg) $why",
354 $addr_is_ok{$dig::rdata}= 1 if $cfg->{'style'} eq 'stealth';
355 push @{ $s2g{$dig::rdata} }, $dig::rdata;
361 @glue= @{ $s2g{$s} };
363 zone_warning("glueless NS $s, from $ww") unless $glueless_ok;
366 $glue= join ' ', sort @glue;
367 push @{ $glue{$s}{$glue} }, $why;
370 push @{ $nsrrset_ref->{$s} }, $why;
374 #-------------------- outputting
377 $output_contents{$$cfg{'output'}}.=
385 $$cfg{'style'} eq 'primary' ? 'master' : 'slave',
390 #-------------------- general utilities
394 return unless $debug;
395 local $Data::Dumper::Terse=1;
396 foreach $vn (split /\s+/, $_[0]) {
397 print "$vn := ", eval "Dumper(\\$vn)";
401 sub debug_trace ($) {
402 return unless $debug;
407 my ($type,$domain,$okrcodes) = @_;
409 defined($c= open ADH, "-|") or die "$0: fork adnshost:\n $!\n";
411 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
413 die "$0: exec adnshost:\n $!\n";
418 die "$0: lookup -t$type $domain $okrcodes failed $? $!\n"
419 if $! or $?>6 or index($okrcodes,$?)<0;
426 use vars $owner, $type, $rdata;
429 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
430 # also pseudo-rr with type `flags:'
435 defined($c= open $h, "-|") or die "$0: fork dig:\n $!\n";
438 '+nodef','+nosea','+nodebug','+norecurse',
439 "\@$qaddr",'-t',$qtype,$qowner);
440 die "$0: exec dig:\n $!\n";
444 if (!defined($_= $h->getline())) {
445 $h->error() and die "$0: read from dig:\n $!\n";
450 s/^\s+/ / or die "$inmid // $_ ?";
454 s/$/ \(/ unless s/\s*\)$//;
456 if (s/\s*\($//) { $inmid= $_; next; }
457 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
458 $owner=''; $type='flags:'; $rdata= "$1 ";
459 { package main; &$dig::eachrr; };
462 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+IN\s+([A-Z]+)\s+(\S.*)/) {
463 $owner=$1; $type=$2; $rdata=$3;
465 $rdata =~ m/^[.0-9]$/ or die;
466 } elsif ($type eq 'NS') {
467 $rdata =~ m/^[-.0-9a-z]+$/ or die "bad nameserver $rdata ?";
469 } elsif ($type eq 'SOA') {
470 $rdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/
471 or die "bad SOA $rdata ?";
474 debug_trace("ignoring uknown RR type $rtype");
477 { package mina; &$dig::eachrr; }
479 debug_trace("ignoring unknown dig output $_");
491 my ($type,$domain) = @_;
492 my (@result)= lookup($type,$domain);
493 @result==1 or die "$0: lookup -t$type $domain gave more than one RR\n";
498 return unless $check;
500 $soa= lookup1('soa',$zone);
501 $soa_origin=$soa; $soa_origin =~ s/ .*//;
502 $soa_origin_addr= lookup1('a',$soa_origin);
504 @zone_ns= lookup('ns-',$zone);
506 @ok_sources= ($soa_origin_addr);
507 $ok_sources_descr= "SOA ORIGIN $soa_origin [$soa_origin_addr]";
509 if ($style eq 'unoff' || $style eq 'backup') {
510 for $zone_ns (@zone_ns) {
511 @zone_ns_addrs= lookup('a',$zone_ns);
512 push @ok_sources, @zone_ns_addrs;
513 $ok_sources_descr.= ", NS $zone_ns [@zone_ns_addrs]";
517 for $server (@servers) {
518 grep { $server eq $_ } @ok_sources
519 or warn "secondarying from $server which is not ".
520 "$ok_sources_desc\n";
523 if ($style eq 'secondary') {
524 grep { $zone_ns=$_, grep { $myname eq $_ } @mynames } @zone_n
525 or warn "supposedly published secondary but we ".
526 "(@mynames) are not published ($@zone_ns)\n";
533 # $superzone= $zone; $superzone =~ s/^[^\.]+\.//;
534 # @super_ns= lookup('ns-',$zone);
539 for $super_ns (@super_ns) {
541 open DIG, "dig @$super_ns. -t ns +norecurse $zone."
542 or die "$0: fork for dig:\n $!\n";
552 warning "$myname unlisted NS $nsnames"
558 warning "$myname advertised NS $nsnames"
566 set -e; a="`host -t a \"$ns\".`"; set +e
567 taddrs="`echo \" $a\" | expand | sed -n '
569 s/^[^ ][^ ]* *A *\([0-9][.0-9]*\)/\1/p
571 equlines "A $ns" "$a" "$taddrs"
572 addrs="$addrs $taddrs"
582 for server in $servers
590 if [ "x$addr" = "x$server" ]
597 warning "server $server? but $rectype $names" $addrs
612 checkhostout -val localhost
618 chdir "$base/primary" or die "$0: chdir $base/primary:\n $!";
619 beginfile('primary.zones');
622 $zone= $f; $zone =~ s/_db$//;
627 zone="`echo $f | sed -e 's/_db$//'`"
636 $currentfile_opened= $install ? "$conf/$currentfile.new" : "/dev/null";
637 open CFF, "> $toopen" or die "$0: begin $currentfile_opened:\n $!\n";
641 close CFF or die "$0: close $currentfile_opened:\n $!\n";
642 push @files, $currentfile;
645 sub installfiles () {
646 return unless $install;
647 chdir $conf or die "$0: chdir $conf:\n $!\n";
649 rename "$f.new", $f or die "$0: install new $f:\n $!\n";
654 echo >&2 "$zone $style: $*"
655 warnings=$[$warnings+1]
659 if [ "x`echo \" $2\" | wc -l`" != "x`echo \" $3\" | wc -l`" ]
667 hostout="`host $1 \"$zone\" 2>&1 >/dev/null $2 | egrep -v \
668 '^ \!\!\! .* SOA primary .* is not advertised via NS$'`"
670 if [ "x$hostout" = x ]; then return; fi
673 warning "warnings from host:"
682 echo -n "$zone $style " >&2
689 if [ $warnings != 0 ]
691 echo >&2 "$warnings warnings "