use IO::File;
use Data::Dumper;
-use vars qw($etcfile $where);
-$etcfile= "/etc/bind/chiark-conf-gen.zones";
-$where= '<built-in>';
+use vars qw($mode
+ $etcfile $where
+ $debug $needglue $localonly $verbosity);
-use vars qw($mode $verbosity $debug);
$mode= '';
-$verbosity= 1;
+$etcfile= "/etc/bind/chiark-conf-gen.zones";
+$where= '<built-in>';
$debug= 0;
+$needglue= 1;
+$localonly= 0;
+$verbosity= 1;
+
+use vars qw($dig_owner $dig_type $dig_rdata);
while (@ARGV && $ARGV[0] =~ m/^\-/) {
$_= shift @ARGV;
if (s/^\-\-//) {
last if m/^$/;
- if (m/^quiet$/) { $verbosity=0; }
- elsif (m/^verbose$/) { $verbosity=2; }
- elsif (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
+ if (m/^(yes|no|force)$/) { m/^./; $mode= $&; }
elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
+ elsif (m/^glueless$/) { $needglue=0; }
+ elsif (m/^localonly$/) { $localonly=1; }
+ elsif (m/^quiet$/) { $verbosity=0; }
+ elsif (m/^verbose$/) { $verbosity=2; }
else { usageerr("unknown option --$_"); }
} else {
s/^\-//;
last if m/^$/;
while (m/^./) {
if (s/^[ynf]//) { $mode=$&; }
- elsif (s/^v//) { $verbosity=2; }
- elsif (s/^q//) { $verbosity=0; }
- elsif (s/^D//) { $debug=1; }
elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
+ elsif (s/^D//) { $debug++; }
+ elsif (s/^g//) { $needglue=0; }
+ elsif (s/^l//) { $localonly=1; }
+ elsif (s/^q//) { $verbosity=0; }
+ elsif (s/^v//) { $verbosity=2; }
else { usageerr("unknown option -$&"); }
}
}
%output_contents= ();
use vars qw($check $install);
-$check= $mode !~ m/^n/;
+$check= $mode !~ m/^f/;
$install= $mode =~ m/^[yf]/;
read_config($etcfile);
process_zones($mode ? @zone_cfg_list : @ARGV);
debug_dump('%output_contents');
+print STDERR "$0: $warnings warnings\n" if $warnings;
+exit 0;
+
+#-------------------- configuration reading
+
+sub cfg_fail ($) { die "$0: $where:\n $_[0]\n"; }
+
+sub read_config ($) {
+ my ($if) = @_;
+ my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
+ local ($_);
+
+ $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
+ for (;;) {
+ if (!defined($_= <$fh>)) {
+ cfg_fail("read config file $if:\n $!") if $fh->error();
+ last;
+ }
+ $where= "$if:$.";
+ s/^\s+//; chomp; s/\s+$//;
+ next if m/^\#/;
+ last if m/^end$/;
+ next unless m/\S/;
+ if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
+ @self= split /\s+/, $2;
+ @self_ns= @self if $1 ne '-soa';
+ @self_soa= @self if $1 ne '-ns';
+ } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
+ ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
+ $suffix= '_db' if !length $suffix;
+ opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
+ $lprefix= length $prefix; $lsuffix= length $suffix;
+ while ($!=0, $_= readdir D) {
+ next if m/^\./ && !$lprefix;
+ next unless length > $lprefix+$lsuffix;
+ next unless substr($_,0,$lprefix) eq $prefix;
+ next unless substr($_,length($_)-$lsuffix) eq $suffix;
+ $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
+ zone_conf($z,'primary',"$dir/$_");
+ }
+ $! and cfg_fail("read primary-dir $dir:\n $!");
+ closedir D or cfg_fail("close primary-dir $dir:\n $!");
+ } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
+ zone_conf($1,'primary',qualify($2));
+ } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
+ zone_conf($1,'secondary','',$2);
+ } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
+ zone_conf($1,'stealth','',split /\s+/, $2);
+ } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
+ ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
+ } elsif (m/^output\s+bind8\+(\S+)$/) {
+ cfg_fail("default output may not apply to only some zones")
+ if @zone_cfg_list && length $default_output;
+ set_output(qualify($1));
+ } elsif (m/^include\s+(\S+)$/) {
+ read_config($1);
+ } else {
+ cfg_fail("unknown configuration directive".
+ " or incorrect syntax or arguments");
+ }
+ }
+ $fh->close or cfg_fail("close config file $if:\n $!");
+}
+
+sub qualify ($) {
+ my ($i) = @_;
+ $i= "$default_dir/$i" unless $i =~ m,^/,;
+}
+
+sub zone_conf ($$@) {
+ my ($zone,$style,$file,@servers) = @_;
+ $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
+ unless length $file;
+ if (!length $output) {
+ $default_output= qualify('chiark-conf-gen.bind8')
+ unless length $default_output;
+ set_output($default_output);
+ }
+ cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
+ $zone_cfg{$zone}{'file'}= $file;
+ $zone_cfg{$zone}{'style'}= $style;
+ $zone_cfg{$zone}{'servers'}= [ @servers ];
+ $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
+ $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
+ $zone_cfg{$zone}{'output'}= $output;
+ push @zone_cfg_list, $zone;
+}
+
+sub set_output($) {
+ my ($newout) = @_;
+ $output= $newout;
+ $output_contents{$output}= '';
+}
+
+
+#-------------------- checking
+
use vars qw($zone $cfg $warnings);
$warnings= 0;
print "$_[0]\n";
}
+sub verbose ($) {
+ return if $verbosity<2;
+ print " $_[0]\n";
+}
+
sub process_zones (@) {
my (@zones) = @_;
local ($zone,$cfg);
foreach $zone (@zones) {
- $cfg= $zone_cfg{$zone} || { 'style' => 'foreign' };
+ $cfg= $zone_cfg{$zone} || {
+ 'style' => 'foreign',
+ 'servers' => [ ],
+ };
progress(sprintf "%-40s %s", $zone, $$cfg{'style'});
if ($check) {
- eval { zone_check() };
+ eval {
+ if ($localonly && $cfg->{'style'} eq 'foreign') {
+ zone_warning("foreign zone specified with -l");
+ } elsif ($localonly && $cfg->{'style'} ne 'primary') {
+ zone_check_local();
+ } else {
+ zone_check_full();
+ }
+ };
zone_warning("checks failed: $@") if length $@;
}
zone_output() if $install;
print STDERR " $_[0]\n" or die $!;
}
-use vars qw(%delgs # $delgs{$nameserver_list} = [ $whosaidandwhy ]
- %auths # $auths{$nameserver_list} = [ $whosaidandwhy ]
- %glue # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
- %soas # $soa{"$origin $serial"} = [ $whosaidandwhy ]
- @to_check # ($addr,$whyask,\%delgs_or_auths,$glueless_ok, ...)
- @to_check_soa # ($addr,$whyask, ...)
- );
-
-sub zone_check () {
- my ($super_zone, @super_nsnames,
- $super_ns, @super_ns_addrs, $super_ns_addr, $s, $wa, $zcr,
- %nsrrset_checked, %soa_checked);
+use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
+use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
+use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
+use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ]
+use vars qw(%addr_is_ok);
+use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...)
+use vars qw(@to_check_soa); # ($addr,$whyask, ...)
+
+sub zone_check_full () {
+ zone_reset();
+ zone_investigate();
+ zone_consistency();
+ zone_servers_ok();
+}
- %delgs= %auths= %glue= ();
+sub zone_reset() {
+ %delgs= %auths= %glue= %soas= %addr_is_ok= ();
@to_check= @to_check_soa= ();
+}
+
+sub zone_investigate() {
+ my ($super_zone, @super_nsnames,
+ $super_ns, @super_ns_addrs, $s, $wa, $is_auth,
+ %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode);
$super_zone= $zone;
for (;;) {
}
for $super_ns (@super_nsnames) {
$super_ns= lc $super_ns;
- ($rcode,@this_ns_addrs)= lookup($super_ns,'a','0');
- foreach $super_ns_addr (@this_ns_addrs) {
+ ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0');
+ foreach $addr (@super_ns_addrs) {
push @to_check,
- $super_ns_addr,
- "addr for $super_ns, server for $super_zone, parent"
- \%delgs, 0;
+ $addr,
+ "$super_ns, server for $super_zone",
+ 0, 0;
}
}
for (;;) {
# nameservers that came from other NS RRsets first; otherwise
# we might set nsrrset_checked due to a glueless_ok check,
# and then not check for gluefulness later.
- if (($addr,$wa,$nsrrset_ref,$glueless_ok,@to_check) = @to_check) {
- next if $nsrrset_checked{$ns}++;
- push @to_check_soa, $addr, $why;
- zone_check_nsrrset($super_ns_addr,"$addr, $wa",
- %$delgs_or_auths,$glueless_ok);
- } elsif (($addr,$wa) = @to_check_soa) {
- next if !$soa_checked{$ns}++;
- zone_check_soa($addr,"$addr, $wa");
+ debug_dump('@to_check @to_check_soa');
+ if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) {
+ push @to_check_soa, $addr, $wa if $is_auth;
+ next if $nsrrset_checked{$addr}++;
+ zone_check_nsrrset($addr, "[$addr] $wa",
+ $is_auth, $glueless_ok);
+ } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) {
+ next if $soa_checked{$addr}++;
+ zone_check_soa($addr,"[$addr] $wa");
+ } else {
+ last;
}
}
- zone_consistency();
-}
-
-sub zone_consistency() {
- my ($d);
- zone_consistency_set('delegations',%delgs);
- foreach $d (keys %delgs) { delete $auths{$d}; }
- zone_consistency_set('zone nameserver rrset',%auths);
- foreach $h (keys %glue) {
- zone_consistency_set("glue for $h", %{ $glue{$h} });
- }
}
-sub zone_consistency_set ($\%) {
- my ($msg,$set) = @_;
- my ($d,$o);
- if (keys(%$set) != 1) {
- zone_warning("inconsistent $msg:");
- foreach $d (keys %$set) {
- foreach $o (@$d) { zone_warnmore(" $d from $o"); }
+sub zone_check_nsrrset ($$$$) {
+ my ($uaddr,$ww, $is_auth, $glueless_ok) = @_;
+ my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths);
+ verbose("checking delegation by $ww");
+ dig(sub {
+ if ($dig_type eq 'ns' && $dig_owner eq $zone) {
+ $s2g{lc $dig_rdata} = [ ];
+ } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
+ push @to_check,
+ $dig_rdata,
+ "$dig_owner, in glue from $ww",
+ 1, 0;
+ $addr_is_ok{$dig_rdata}= "$dig_owner (NS [$uaddr])"
+ if $cfg->{'style'} eq 'stealth';
+ push @{ $s2g{$dig_owner} }, $dig_rdata;
}
+ },
+ $zone,'ns',$uaddr);
+ if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; }
+ elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); }
+ @s= sort keys %s2g;
+ foreach $s (@s) {
+ @glue= @{ $s2g{$s} };
+ if (!@glue) {
+ zone_warning("glueless NS $s, from $ww")
+ unless $glueless_ok || !$needglue;
+ next;
+ }
+ $glue= join ' ', sort @glue;
+ push @{ $glue{$s}{$glue} }, $ww;
}
+ $s= join ' ', @s;
+ $delgs_or_auths= $is_auth ? \%auths : \%delgs;
+ push @{ $delgs_or_auths->{$s} }, $ww;
}
sub zone_check_soa ($$) {
my ($uaddr,$ww) = @_;
my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
+ verbose("checking service at $ww");
$lame= 'dead or lame';
- dig::dig({
- if ($dig::type eq 'flags:') {
- $lame= $dig::rdata =~ m/ aa / ? 'lame' : '';
- } elsif ($dig::type eq 'soa' && $dig::owner eq $zone && !$lame) {
- die "several SOAs ? $why" if defined $origin;
- $dig::rdata =~ m/^(\S+) \S+ (\d+) /
- or die "soa $dig::rdata ? $why";
+ dig(sub {
+ if ($dig_type eq 'flags:') {
+ $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
+ } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
+ die "several SOAs ? $ww" if defined $origin;
+ $got= $dig_rdata;
+ $got =~ m/^(\S+) \d+/ or die "$got ?";
$origin= $1;
- $got= "$1 $2";
}
},
$zone,'soa',$uaddr);
$lame= 'broken' if !$lame && !defined $origin;
if ($lame) { zone_warning("$lame server $ww"); return; }
- push @{ $soas{$got} }, $why;
+ push @{ $soas{$got} }, $ww;
($rcode,@soa_addrs)= lookup($origin,'a','0');
foreach $soa_addr (@soa_addrs) {
+ $addr_is_ok{$soa_addr}= "$origin (SOA [$uaddr])";
push @to_check,
$soa_addr,
- "addr for $origin, SOA ORIGIN from $why";
+ "$origin, SOA ORIGIN from $ww";
}
}
-sub zone_check_nsrrset ($$\%\%) {
- my ($uaddr,$ww, $delgs_or_auths,$glueless_ok) = @_;
- my (@s, $s, %s2g, @glue, $glue);
- dig::dig({
- if ($dig::type eq 'ns' && $dig::owner eq $zone) {
- $s2g{lc $dig::rdata} = [ ];
- } elsif ($dig::type eq 'a' && exists $s2g{$dig::owner}) {
- push @to_check,
- $dig::rdata,
- "glue for $dig::owner, from (eg) $why",
- \%auths, 0;
- push @{ $s2g{$dig::rdata} }, $dig::rdata;
+sub zone_consistency() {
+ my ($d, $org_ser, $origin, $a, $h);
+ zone_consistency_set('delegations',\%delgs);
+ foreach $d (keys %delgs) { delete $auths{$d}; }
+ zone_consistency_set('zone nameserver rrset',\%auths);
+ foreach $h (keys %glue) {
+ zone_consistency_set("glue for $h", $glue{$h});
+ }
+ zone_consistency_set("SOA ORIGIN and SERIAL",\%soas);
+ if ($cfg->{'style'} eq 'primary') {
+ foreach $org_ser (keys %soas) {
+ $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?";
+ $origin= $1;
+ next if grep { $_ eq $origin } @self_soa;
+ zone_warning("our name(s) @self_soa not in SOA ORIGIN $origin,".
+ " eg from ".((values %{ $soas{$org_ser} })[1]));
}
- },
- $zone,'ns',$uaddr);
- @s= sort keys %s2g;
- foreach $s (@s) {
- @glue= @{ $s2g{$s} };
- if (!length @glue) {
- zone_warning("glueless NS $s, from $ww") unless $glueless_ok;
- next;
+ }
+}
+
+sub zone_servers_ok () {
+ my ($showok);
+ if (%addr_is_ok) {
+ $showok= 0;
+ foreach $a (@{ $cfg->{'servers'} }) {
+ next if exists $addr_is_ok{$a};
+ zone_warning("we slave from $a"); $showok=1;
+ }
+ if ($showok) {
+ foreach $a (keys %addr_is_ok) {
+ zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
+ }
}
- $glue= join ' ', sort @glue;
- push @{ $glue{$s}{$glue} }, $why;
}
- $s= join ' ', @s;
- push @{ $nsrrset_ref->{$s} }, $why;
}
+sub zone_consistency_set ($%) {
+ my ($msg,$set) = @_;
+ my ($d,$o);
+ if (keys(%$set) > 1) {
+ zone_warning("inconsistent $msg:");
+ foreach $d (keys %$set) {
+ foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
+ }
+ }
+}
+
+sub zone_check_local () {
+ zone_reset();
+ zone_servers_simplefind();
+ zone_servers_ok();
+}
+
+sub zone_servers_simplefind () {
+ my ($rcode,@nsnames,$ns,@soas,$origin);
+ if ($cfg->{'style'} eq 'stealth') {
+ ($rcode,@nsnames)= lookup($zone,'ns-','0');
+ foreach $ns (@nsnames) { zone_server_simple($ns,'NS'); }
+ }
+ ($rcode,@soas)= lookup($zone,'soa','0');
+ die "multiple SOA RRs in set! @soas ?" if @soas!=1;
+ $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
+ zone_server_simple(domain_canon($1),'SOA');
+}
+
+sub zone_server_simple ($$) {
+ my ($name,$why) = @_;
+ my ($rcode,@addrs,$addr);
+ ($rcode,@addrs)= lookup($name,'a','0');
+ foreach $addr (@addrs) { $addr_is_ok{$addr}= "$name ($why)"; }
+}
+
+#-------------------- outputting
+
sub zone_output () {
$output_contents{$$cfg{'output'}}.=
sprintf(<<'END',
$$cfg{'file'});
}
+
+#-------------------- general utilities
+
sub debug_dump ($) {
my ($vn);
- return unless $debug;
+ return unless $debug>1;
local $Data::Dumper::Terse=1;
foreach $vn (split /\s+/, $_[0]) {
print "$vn := ", eval "Dumper(\\$vn)";
}
}
-sub cfg_fail ($) { die "$0: $where:\n $_[0]\n"; }
-
-sub read_config ($) {
- my ($if) = @_;
- my ($fh,$z,@self, $dir,$prefix,$suffix,$lprefix,$lsuffix);
- local ($_,$1,$2,$3);
-
- $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
- for (;;) {
- if (!defined($_= <$fh>)) {
- cfg_fail("read config file $if:\n $!") if $fh->error();
- last;
- }
- $where= "$if:$.";
- s/^\s+//; chomp; s/\s+$//;
- next if m/^\#/;
- last if m/^end$/;
- next unless m/\S/;
- if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
- @self= split /\s+/, $2;
- @self_ns= @self if $1 ne '-soa';
- @self_soa= @self if $1 ne '-ns';
- } elsif (m/^primary\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
- ($dir, $prefix, $suffix) = (qualify($1),$2,$3);
- $suffix= '_db' if !length $suffix;
- opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
- $lprefix= length $prefix; $lsuffix= length $suffix;
- while ($!=0, $_= readdir D) {
- next if m/^\./ && !$lprefix;
- next unless length > $lprefix+$lsuffix;
- next unless substr($_,0,$lprefix) eq $prefix;
- next unless substr($_,length($_)-$lsuffix) eq $suffix;
- $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
- zone_conf($z,'primary',"$dir/$_");
- }
- $! and cfg_fail("read primary-dir $dir:\n $!");
- closedir D or cfg_fail("close primary-dir $dir:\n $!");
- } elsif (m/^primary\s+(\S+)\s+(\S+)$/) {
- zone_conf($1,'primary',qualify($2));
- } elsif (m/^secondary\s+(\S+)\s+([0-9.\t]+)$/) {
- zone_conf($1,'secondary','',$2);
- } elsif (m/^stealth\s+(\S+)\s+([0-9. \t]+)$/) {
- zone_conf($1,'stealth','',split /\s+/, $2);
- } elsif (m/^slave\-dir\s+(\S+)((?:\s+(\S+))??:\s+(\S+))?$/) {
- ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
- } elsif (m/^output\s+bind8\+(\S+)$/) {
- cfg_fail("default output may not apply to only some zones")
- if @zone_cfg_list && length $default_output;
- set_output(qualify($1));
- } elsif (m/^include\s+(\S+)$/) {
- read_config($1);
- } else {
- cfg_fail("unknown configuration directive".
- " or incorrect syntax or arguments");
- }
- }
- $fh->close or cfg_fail("close config file $if:\n $!");
-}
-
-sub qualify ($) {
- my ($i) = @_;
- $i= "$default_dir/$i" unless $i =~ m,^/,;
-}
-
-sub zone_conf ($$@) {
- my ($zone,$style,$file,@servers) = @_;
- $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
- unless length $file;
- if (!length $output) {
- $default_output= qualify('chiark-conf-gen.bind8')
- unless length $default_output;
- set_output($default_output);
- }
- cfg_fail("redefined zone $zone") if exists $zone_cfg{$zone};
- $zone_cfg{$zone}{'file'}= $file;
- $zone_cfg{$zone}{'style'}= $style;
- $zone_cfg{$zone}{'servers'}= [ @servers ];
- $zone_cfg{$zone}{'self_soa'}= [ @self_soa ];
- $zone_cfg{$zone}{'self_ns'}= [ @self_ns ];
- $zone_cfg{$zone}{'output'}= $output;
- push @zone_cfg_list, $zone;
-}
-
-sub set_output($) {
- my ($newout) = @_;
- $output= $newout;
- $output_contents{$output}= '';
+sub debug_trace ($) {
+ return unless $debug;
+ print "D $_[0]\n";
}
sub lookup ($$$) {
- my ($type,$domain,$okrcodes) = @_;
- my ($c,@result);
- defined($c= open ADH, "-|") or die "$0: fork adnshost:\n $!\n";
+ my ($domain,$type,$okrcodes) = @_;
+ my ($c,$h,@result);
+ debug_trace("lookup ==> (->$okrcodes) $domain $type");
+ $h= new IO::Handle;
+
+ defined($c= open $h, "-|") or die "$0: fork adnshost:\n $!\n";
if (!$c) {
exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
'-',"$domain.";
die "$0: exec adnshost:\n $!\n";
}
- @result= <ADH>;
+ @result= $h->getlines();
+ $h->error and die "$0: read from adnshost:\n $!\n";
chomp @result;
- $!=0; close ADH;
+ $!=0; $h->close;
die "$0: lookup -t$type $domain $okrcodes failed $? $!\n"
if $! or $?>6 or index($okrcodes,$?)<0;
+ debug_trace("lookup <== $? @result");
return ($?,@result);
}
+
+sub dig (&$$$) {
+ my ($eachrr, $qowner,$qtype,$qaddr) = @_;
+ # also pseudo-rr with type `flags:'
+ my ($h,$inmid,$irdata,$c);
+ local ($_);
+
+ debug_trace("dig ==> \@$qaddr $qowner $qtype");
+
+ $h= new IO::Handle;
+ defined($c= open $h, "-|") or die "$0: fork dig:\n $!\n";
+ if (!$c) {
+ open STDERR, ">&STDOUT" or die $!;
+ exec ('dig',
+ '+nodef','+nosea','+nodebug','+norecurse',
+ "\@$qaddr",'-t',$qtype,$qowner);
+ die "$0: exec dig:\n $!\n";
+ }
+ $inmid='';
+ for (;;) {
+ if (!defined($_= $h->getline())) {
+ $h->error() and die "$0: read from dig:\n $!\n";
+ last;
+ }
+ chomp;
+ if (length $inmid) {
+ s/^\s+/ / or die "$inmid // $_ ?";
+ s/\;.*$//;
+ $_= $inmid.$_;
+ $inmid='';
+ s/$/ \(/ unless s/\s*\)\s*$//;
+ }
+ if (s/\s*\(\s*$//) { $inmid= $_; next; }
+ if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
+ $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
+ debug_trace("dig f: $dig_rdata");
+ &$eachrr;
+ } elsif (m/^\;/) {
+ } elsif (!m/\S/) {
+ } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
+ $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3;
+ if ($dig_type eq 'a') {
+ $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
+ $dig_rdata= $&;
+ } elsif ($dig_type eq 'ns') {
+ $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
+ $dig_rdata= domain_canon($irdata);
+ } elsif ($dig_type eq 'soa') {
+ $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
+ or die "bad SOA $irdata ?";
+ $dig_rdata= domain_canon($1).' '.$2;
+ } else {
+ debug_trace("ignoring uknown RR type $dig_type");
+ next;
+ }
+ debug_trace("dig $dig_owner $dig_type $dig_rdata");
+ &$eachrr;
+ } else {
+ debug_trace("ignoring unknown dig output $_");
+ }
+ }
+ $h->close;
+ debug_trace("dig <== gave $?");
+}
+
+sub domain_canon ($) {
+ local ($_) = @_;
+ s/(.)\.$/$1/;
+ die "domain $_ ?" unless m/^[0-9a-z]/i;
+ return lc $_;
+}
+
__DATA__
~ian / chiark-utils.git / blobdiff