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($mode ? @zone_cfg_list : @ARGV);
98 debug_dump('%output_contents');
101 #-------------------- configuration reading
103 sub cfg_fail ($) { die "$0: $where:\n $_[0]\n"; }
105 sub read_config ($) {
107 my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
110 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
112 if (!defined($_= <$fh>)) {
113 cfg_fail("read config file $if:\n $!") if $fh->error();
117 s/^\s+//; chomp; s/\s+$//;
121 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
122 @self= split /\s+/, $2;
123 @self_ns= @self if $1 ne '-soa';
124 @self_soa= @self if $1 ne '-ns';
125 } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
126 ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
127 $suffix= '_db' if !length $suffix;
128 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
129 $lprefix= length $prefix; $lsuffix= length $suffix;
130 while ($!=0, $_= readdir D) {
131 next if m/^\./ && !$lprefix;
132 next unless length > $lprefix+$lsuffix;
133 next unless substr($_,0,$lprefix) eq $prefix;
134 next unless substr($_,length($_)-$lsuffix) eq $suffix;
135 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
136 zone_conf($z,'primary',"$dir/$_");
138 $! and cfg_fail("read primary-dir $dir:\n $!");
139 closedir D or cfg_fail("close primary-dir $dir:\n $!");
140 } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
141 zone_conf($1,'primary',qualify($2));
142 } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
143 zone_conf($1,'secondary','',$2);
144 } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
145 zone_conf($1,'stealth','',split /\s+/, $2);
146 } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
147 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
148 } elsif (m/^output\s+bind8\+(\S+)$/) {
149 cfg_fail("default output may not apply to only some zones")
150 if @zone_cfg_list && length $default_output;
151 set_output(qualify($1));
152 } elsif (m/^include\s+(\S+)$/) {
155 cfg_fail("unknown configuration directive".
156 " or incorrect syntax or arguments");
159 $fh->close or cfg_fail("close config file $if:\n $!");
164 $i= "$default_dir/$i" unless $i =~ m,^/,;
167 sub zone_conf ($$@) {
168 my ($zone,$style,$file,@servers) = @_;
169 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
171 if (!length $output) {
172 $default_output= qualify('chiark-conf-gen.bind8')
173 unless length $default_output;
174 set_output($default_output);
176 cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
177 $zone_cfg{$zone}{'file'}= $file;
178 $zone_cfg{$zone}{'style'}= $style;
179 $zone_cfg{$zone}{'servers'}= [ @servers ];
180 $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
181 $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
182 $zone_cfg{$zone}{'output'}= $output;
183 push @zone_cfg_list, $zone;
189 $output_contents{$output}= '';
193 #-------------------- checking
195 use vars qw($zone $cfg $warnings);
199 return if !$verbosity;
204 return if $verbosity<2;
208 sub process_zones (@) {
212 foreach $zone (@zones) {
213 $cfg= $zone_cfg{$zone} || {
214 'style' => 'foreign',
217 progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
220 if ($localonly && $cfg->{'style'} eq 'foreign') {
221 zone_warning("foreign zone specified with -l");
222 } elsif ($localonly && $cfg->{'style'} ne 'primary') {
228 zone_warning("checks failed: $@") if length $@;
230 zone_output() if $install;
234 sub zone_warning ($) {
238 print STDERR "$zone: warning: $w\n" or die $!;
242 sub zone_warnmore ($) {
243 print STDERR " $_[0]\n" or die $!;
246 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
247 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
248 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
249 use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
250 use vars qw(%addr_is_ok);
251 use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
252 use vars qw(@to_check_soa); # ($addr,$whyask, ...)
254 sub zone_check_full () {
262 %delgs= %auths= %glue= %soas= %addr_is_ok= ();
263 @to_check= @to_check_soa= ();
266 sub zone_investigate() {
267 my ($super_zone, @super_nsnames,
268 $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
269 %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
273 debug_trace("zone $zone superzone $super_zone");
274 $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n";
275 ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06');
278 for $super_ns (@super_nsnames) {
279 $super_ns= lc $super_ns;
280 ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
281 foreach $addr (@super_ns_addrs) {
284 "$super_ns, server for $super_zone",
289 # We do these in order so that we always do NS RRset checks on
290 # nameservers that came from other NS RRsets first; otherwise
291 # we might set nsrrset_checked due to a glueless_ok check,
292 # and then not check for gluefulness later.
293 debug_dump('@to_check @to_check_soa');
294 if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
295 push @to_check_soa, $addr, $wa if $is_auth;
296 next if $nsrrset_checked{$addr}++;
297 zone_check_nsrrset($addr, "[$addr] $wa",
298 $is_auth, $glueless_ok);
299 } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
300 next if $soa_checked{$addr}++;
301 zone_check_soa($addr,"[$addr] $wa");
308 sub zone_check_nsrrset ($$$$) {
309 my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
310 my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
311 verbose("checking delegation by $ww");
313 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
314 $s2g{lc $dig_rdata} = [ ];
315 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
318 "$dig_owner, in glue from $ww",
320 $addr_is_ok{$dig_rdata}= "$dig_owner (NS [$uaddr])"
321 if $cfg->{'style'} eq 'stealth';
322 push @{ $s2g{$dig_owner} }, $dig_rdata;
326 if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
327 elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
330 @glue= @{ $s2g{$s} };
332 zone_warning("glueless NS $s, from $ww")
333 unless $glueless_ok || !$needglue;
336 $glue= join ' ', sort @glue;
337 push @{ $glue{$s}{$glue} }, $ww;
340 $delgs_or_auths= $is_auth ? \%auths : \%delgs;
341 push @{ $delgs_or_auths->{$s} }, $ww;
344 sub zone_check_soa ($$) {
345 my ($uaddr,$ww) = @_;
346 my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
347 verbose("checking service at $ww");
348 $lame= 'dead or lame';
350 if ($dig_type eq 'flags:') {
351 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
352 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
353 die "several SOAs ? $ww" if defined $origin;
355 $got =~ m/^(\S+) \d+/ or die "$got ?";
360 $lame= 'broken' if !$lame && !defined $origin;
361 if ($lame) { zone_warning("$lame server $ww"); return; }
362 push @{ $soas{$got} }, $ww;
363 ($rcode,@soa_addrs)= lookup($origin,'a','0');
364 foreach $soa_addr (@soa_addrs) {
365 $addr_is_ok{$soa_addr}= "$origin (SOA [$uaddr])";
368 "$origin, SOA ORIGIN from $ww";
372 sub zone_consistency() {
373 my ($d, $org_ser, $origin, $a, $h);
374 zone_consistency_set('delegations',\%delgs);
375 foreach $d (keys %delgs) { delete $auths{$d}; }
376 zone_consistency_set('zone nameserver rrset',\%auths);
377 foreach $h (keys %glue) {
378 zone_consistency_set("glue for $h", $glue{$h});
380 zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
381 if ($cfg->{'style'} eq 'primary') {
382 foreach $org_ser (keys %soas) {
383 $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
385 next if grep { $_ eq $origin } @self_soa;
386 zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
387 " eg from ".((values %{ $soas{$org_ser} })[1]));
392 sub zone_servers_ok () {
396 foreach $a (@{ $cfg->{'servers'} }) {
397 next if exists $addr_is_ok{$a};
398 zone_warning("we slave from $a"); $showok=1;
401 foreach $a (keys %addr_is_ok) {
402 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
408 sub zone_consistency_set ($%) {
411 if (keys(%$set) > 1) {
412 zone_warning("inconsistent $msg:");
413 foreach $d (keys %$set) {
414 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
419 sub zone_check_local () {
421 zone_servers_simplefind();
425 sub zone_servers_simplefind () {
426 my ($rcode,@nsnames,$ns,@soas,$origin);
427 if ($cfg->{'style'} eq 'stealth') {
428 ($rcode,@nsnames)= lookup($zone,'ns-','0');
429 foreach $ns (@nsnames) { zone_server_simple($ns,'NS'); }
431 ($rcode,@soas)= lookup($zone,'soa','0');
432 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
433 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
434 zone_server_simple(domain_canon($1),'SOA');
437 sub zone_server_simple ($$) {
438 my ($name,$why) = @_;
439 my ($rcode,@addrs,$addr);
440 ($rcode,@addrs)= lookup($name,'a','0');
441 foreach $addr (@addrs) { $addr_is_ok{$addr}= "$name ($why)"; }
444 #-------------------- outputting
447 $output_contents{$$cfg{'output'}}.=
455 $$cfg{'style'} eq 'primary' ? 'master' : 'slave',
460 #-------------------- general utilities
464 return unless $debug>1;
465 local $Data::Dumper::Terse=1;
466 foreach $vn (split /\s+/, $_[0]) {
467 print "$vn := ", eval "Dumper(\\$vn)";
471 sub debug_trace ($) {
472 return unless $debug;
477 my ($domain,$type,$okrcodes) = @_;
479 debug_trace("lookup ==> (->$okrcodes) $domain $type");
482 defined($c= open $h, "-|") or die "$0: fork adnshost:\n $!\n";
484 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
486 die "$0: exec adnshost:\n $!\n";
488 @result= $h->getlines();
489 $h->error and die "$0: read from adnshost:\n $!\n";
492 die "$0: lookup -t$type $domain $okrcodes failed $? $!\n"
493 if $! or $?>6 or index($okrcodes,$?)<0;
494 debug_trace("lookup <== $? @result");
500 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
501 # also pseudo-rr with type `flags:'
502 my ($h,$inmid,$irdata,$c);
505 debug_trace("dig ==> \@$qaddr $qowner $qtype");
508 defined($c= open $h, "-|") or die "$0: fork dig:\n $!\n";
510 open STDERR, ">&STDOUT" or die $!;
512 '+nodef','+nosea','+nodebug','+norecurse',
513 "\@$qaddr",'-t',$qtype,$qowner);
514 die "$0: exec dig:\n $!\n";
518 if (!defined($_= $h->getline())) {
519 $h->error() and die "$0: read from dig:\n $!\n";
524 s/^\s+/ / or die "$inmid // $_ ?";
528 s/$/ \(/ unless s/\s*\)\s*$//;
530 if (s/\s*\(\s*$//) { $inmid= $_; next; }
531 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
532 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
533 debug_trace("dig f: $dig_rdata");
537 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
538 $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
539 if ($dig_type eq 'a') {
540 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
542 } elsif ($dig_type eq 'ns') {
543 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
544 $dig_rdata= domain_canon($irdata);
545 } elsif ($dig_type eq 'soa') {
546 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
547 or die "bad SOA $irdata ?";
548 $dig_rdata= domain_canon($1).' '.$2;
550 debug_trace("ignoring uknown RR type $dig_type");
553 debug_trace("dig $dig_owner $dig_type $dig_rdata");
556 debug_trace("ignoring unknown dig output $_");
560 debug_trace("dig <== gave $?");
563 sub domain_canon ($) {
566 die "domain $_ ?" unless m/^[0-9a-z]/i;
576 my ($type,$domain) = @_;
577 my (@result)= lookup($type,$domain);
578 @result==1 or die "$0: lookup -t$type $domain gave more than one RR\n";
583 return unless $check;
585 $soa= lookup1('soa',$zone);
586 $soa_origin=$soa; $soa_origin =~ s/ .*//;
587 $soa_origin_addr= lookup1('a',$soa_origin);
589 @zone_ns= lookup('ns-',$zone);
591 @ok_sources= ($soa_origin_addr);
592 $ok_sources_descr= "SOA ORIGIN $soa_origin [$soa_origin_addr]";
594 if ($style eq 'unoff' || $style eq 'backup') {
595 for $zone_ns (@zone_ns) {
596 @zone_ns_addrs= lookup('a',$zone_ns);
597 push @ok_sources, @zone_ns_addrs;
598 $ok_sources_descr.= ", NS $zone_ns [@zone_ns_addrs]";
602 for $server (@servers) {
603 grep { $server eq $_ } @ok_sources
604 or warn "secondarying from $server which is not ".
605 "$ok_sources_desc\n";
608 if ($style eq 'secondary') {
609 grep { $zone_ns=$_, grep { $myname eq $_ } @mynames } @zone_n
610 or warn "supposedly published secondary but we ".
611 "(@mynames) are not published ($@zone_ns)\n";
618 # $superzone= $zone; $superzone =~ s/^[^\.]+\.//;
619 # @super_ns= lookup('ns-',$zone);
624 for $super_ns (@super_ns) {
626 open DIG, "dig @$super_ns. -t ns +norecurse $zone."
627 or die "$0: fork for dig:\n $!\n";
637 warning "$myname unlisted NS $nsnames"
643 warning "$myname advertised NS $nsnames"
651 set -e; a="`host -t a \"$ns\".`"; set +e
652 taddrs="`echo \" $a\" | expand | sed -n '
654 s/^[^ ][^ ]* *A *\([0-9][.0-9]*\)/\1/p
656 equlines "A $ns" "$a" "$taddrs"
657 addrs="$addrs $taddrs"
667 for server in $servers
675 if [ "x$addr" = "x$server" ]
682 warning "server $server? but $rectype $names" $addrs
697 checkhostout -val localhost
703 chdir "$base/primary" or die "$0: chdir $base/primary:\n $!";
704 beginfile('primary.zones');
707 $zone= $f; $zone =~ s/_db$//;
712 zone="`echo $f | sed -e 's/_db$//'`"
721 $currentfile_opened= $install ? "$conf/$currentfile.new" : "/dev/null";
722 open CFF, "> $toopen" or die "$0: begin $currentfile_opened:\n $!\n";
726 close CFF or die "$0: close $currentfile_opened:\n $!\n";
727 push @files, $currentfile;
730 sub installfiles () {
731 return unless $install;
732 chdir $conf or die "$0: chdir $conf:\n $!\n";
734 rename "$f.new", $f or die "$0: install new $f:\n $!\n";
739 echo >&2 "$zone $style: $*"
740 warnings=$[$warnings+1]
744 if [ "x`echo \" $2\" | wc -l`" != "x`echo \" $3\" | wc -l`" ]
752 hostout="`host $1 \"$zone\" 2>&1 >/dev/null $2 | egrep -v \
753 '^ \!\!\! .* SOA primary .* is not advertised via NS$'`"
755 if [ "x$hostout" = x ]; then return; fi
758 warning "warnings from host:"
767 echo -n "$zone $style " >&2
774 if [ $warnings != 0 ]
776 echo >&2 "$warnings warnings "