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 $warnings;
+exit 0;
#-------------------- configuration reading
print "$_[0]\n";
}
+sub verbose ($) {
+ return if $verbosity<2;
+ print " $_[0]\n";
+}
+
sub process_zones (@) {
my (@zones) = @_;
local ($zone,$cfg);
};
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, ...)
- %addr_is_ok
- );
-
-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_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");
+ $lame= 'dead or lame';
+ dig(sub {
+ if ($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;
+ }
+ },
+ $zone,'soa',$uaddr);
+ $lame= 'broken' if !$lame && !defined $origin;
+ if ($lame) { zone_warning("$lame server $ww"); return; }
+ 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,
+ $soa_addr,
+ "$origin, SOA ORIGIN from $ww";
+ }
}
sub zone_consistency() {
- my ($d, $org_ser, $origin, $a, $showok);
- zone_consistency_set('delegations',%delgs);
+ my ($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);
+ zone_consistency_set('zone nameserver rrset',\%auths);
foreach $h (keys %glue) {
- zone_consistency_set("glue for $h", %{ $glue{$h} });
+ zone_consistency_set("glue for $h", $glue{$h});
}
- zone_consistency_set("SOA ORIGIN and SERIAL",%soas);
+ 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 ?";
" eg from ".((values %{ $soas{$org_ser} })[1]));
}
}
- $showok= 0;
- foreach $a (@{ $cfg->{'servers'} }) {
- next if $addr_is_ok{$a};
- zone_warning("we slave from $a"); $showok=1;
- }
- if ($showok) {
- zone_warnmore("we must slave from one of ".
- join ' ', keys %addr_is_ok);
+}
+
+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}");
+ }
+ }
}
}
-sub zone_consistency_set ($\%) {
+sub zone_consistency_set ($%) {
my ($msg,$set) = @_;
my ($d,$o);
- if (keys(%$set) != 1) {
+ if (keys(%$set) > 1) {
zone_warning("inconsistent $msg:");
foreach $d (keys %$set) {
- foreach $o (@$d) { zone_warnmore(" $d from $o"); }
+ foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
}
}
}
-sub zone_check_soa ($$) {
- my ($uaddr,$ww) = @_;
- my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr);
- $lame= 'dead or lame';
- dig::dig({
- if ($dig::type eq 'flags:') {
- $lame= $dig::rdata =~ m/ aa / ? 'lame' : '';
- } elsif ($dig::type eq 'soa' && $dig::owner eq $zone && !$lame) {
- die "several SOAs ? $why" if defined $origin;
- $got= $dig::rdata;
- $got =~ m/^(\S+) \d+/ or die "$got ?";
- $origin= $1;
- }
- },
- $zone,'soa',$uaddr);
- $lame= 'broken' if !$lame && !defined $origin;
- if ($lame) { zone_warning("$lame server $ww"); return; }
- push @{ $soas{$got} }, $why;
- ($rcode,@soa_addrs)= lookup($origin,'a','0');
- foreach $soa_addr (@soa_addrs) {
- $addr_is_ok{$soa_addr}= 1;
- push @to_check,
- $soa_addr,
- "addr for $origin, SOA ORIGIN from $why";
- }
+sub zone_check_local () {
+ zone_reset();
+ zone_servers_simplefind();
+ zone_servers_ok();
}
-sub zone_check_nsrrset ($$\%\%) {
- 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;
- $addr_is_ok{$dig::rdata}= 1 if $cfg->{'style'} eq 'stealth';
- push @{ $s2g{$dig::rdata} }, $dig::rdata;
- }
- },
- $zone,'ns',$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;
- }
- $glue= join ' ', sort @glue;
- push @{ $glue{$s}{$glue} }, $why;
+sub zone_servers_simplefind () {
+ my ($rcode,@nsnames,$ns,@soas,$origin);
+ if ($cfg->{'style'} eq 'stealth') {
+ ($rcode,@nsnames)= lookup($zone,'ns-','0');
+ foreach $ns (@nsnames) { zone_server_simple($ns,'NS'); }
}
- $s= join ' ', @s;
- push @{ $nsrrset_ref->{$s} }, $why;
+ ($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 ($$) {
+ my ($name,$why) = @_;
+ my ($rcode,@addrs,$addr);
+ ($rcode,@addrs)= lookup($name,'a','0');
+ foreach $addr (@addrs) { $addr_is_ok{$addr}= "$name ($why)"; }
+}
#-------------------- outputting
sub debug_dump ($) {
my ($vn);
- return unless $debug;
+ return unless $debug>1;
local $Data::Dumper::Terse=1;
foreach $vn (split /\s+/, $_[0]) {
print "$vn := ", eval "Dumper(\\$vn)";
}
sub lookup ($$$) {
- 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);
}
-package dig;
-
-use vars $owner, $type, $rdata;
-
sub dig (&$$$) {
my ($eachrr, $qowner,$qtype,$qaddr) = @_;
# also pseudo-rr with type `flags:'
- my ($h,$inmid);
+ my ($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);
s/\;.*$//;
$_= $inmid.$_;
$inmid='';
- s/$/ \(/ unless s/\s*\)$//;
+ s/$/ \(/ unless s/\s*\)\s*$//;
}
- if (s/\s*\($//) { $inmid= $_; next; }
+ if (s/\s*\(\s*$//) { $inmid= $_; next; }
if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
- $owner=''; $type='flags:'; $rdata= "$1 ";
- { package main; &$dig::eachrr; };
+ $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.*)/) {
- $owner=$1; $type=$2; $rdata=$3;
- if ($type eq 'A') {
- $rdata =~ m/^[.0-9]$/ or die;
- } elsif ($type eq 'NS') {
- $rdata =~ m/^[-.0-9a-z]+$/ or die "bad nameserver $rdata ?";
- $rdata= lc $rdata;
- } elsif ($type eq 'SOA') {
- $rdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/
- or die "bad SOA $rdata ?";
- $rdata= (lc $1).$2;
+ } 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 $rtype");
+ debug_trace("ignoring uknown RR type $dig_type");
next;
}
- { package mina; &$dig::eachrr; }
+ debug_trace("dig $dig_owner $dig_type $dig_rdata");
+ &$eachrr;
} else {
debug_trace("ignoring unknown dig output $_");
}
}
- $h->close or die $!;
+ $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