X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-utils.git;a=blobdiff_plain;f=scripts%2Fnamed-conf;h=ba36757a41a33b4504e38dbd4bd9b34a38c460d4;hp=1bd4792d038dc51498b843e62044cb9910d1d65e;hb=3bee7ab59141f811ec9bd2e41d5ae94ab8426055;hpb=4cf33858a3b94ad85a523f099e417d6e53cd06f0 diff --git a/scripts/named-conf b/scripts/named-conf index 1bd4792..ba36757 100755 --- a/scripts/named-conf +++ b/scripts/named-conf @@ -19,7 +19,7 @@ $where= ''; $debug= 0; $needglue= 1; $localonly= 0; -$verbosity= 1; +$verbosity= 2; $repeat= 0; use vars qw($dig_owner $dig_type $dig_rdata); @@ -33,9 +33,9 @@ while (@ARGV && $ARGV[0] =~ m/^\-/) { elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; } elsif (m/^glueless$/) { $needglue=0; } elsif (m/^localonly$/) { $localonly=1; } - elsif (m/^quiet$/) { $verbosity=0; } + elsif (m/^quiet$/) { $verbosity--; } elsif (m/^repeat$/) { $repeat=1; } - elsif (m/^verbose$/) { $verbosity=2; } + elsif (m/^verbose$/) { $verbosity++; } else { usageerr("unknown option --$_"); } } else { s/^\-//; @@ -47,9 +47,9 @@ while (@ARGV && $ARGV[0] =~ m/^\-/) { elsif (s/^D//) { $debug++; } elsif (s/^g//) { $needglue=0; } elsif (s/^l//) { $localonly=1; } - elsif (s/^q//) { $verbosity=0; } + elsif (s/^q//) { $verbosity--; } elsif (s/^r//) { $repeat=1; } - elsif (s/^v//) { $verbosity=2; } + elsif (s/^v//) { $verbosity++; } else { usageerr("unknown option -$&"); } } } @@ -58,27 +58,36 @@ while (@ARGV && $ARGV[0] =~ m/^\-/) { sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; } sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); } +usageerr("-q may be specified at most twice") if $verbosity<0; +usageerr("-v may be specified at most once") if $verbosity>3; usageerr("-D may be specified at most twice") if $debug>2; usageerr("must specify either -f|-y|-n or zones (and not both)") if !!$mode == !!@ARGV; sub usageerr ($) { - die -"$_[0] -usage: named-conf-regen [options] -f|-y|-n|...\n". -"operation modes:\n". -" -f --force install without checking\n". -" -y --yes check and install\n". -" -n --no check only\n". -"additional options:\n". -" -A --all report on zones marked ? (ones we know are broken)\n". -" -D debug $quis (does not help debug your DNS config)\n". -" -g --glueless do not warn about any glueless referrals (not recommended)\n". -" -l --localonly full checks only on zones which we primary\n". -" -q --quiet no output for OK zones\n". -" -r --repeat repeat warnings for all sources of imperfect data\n". -" -v --verbose extra verbose info about each zone\n". -" -C|--config ... +operation modes: + -f --force install without checking + -y --yes check and install + -n --no check only (configured zones) + ... check only (specified zones, even unconfigured ones) +additional options: + -A --all report on zones marked ? (ones we know are broken) + -D debug $quis (does not help debug your DNS config) + -g --glueless do not warn about any glueless referrals (not recommended) + -l --localonly full checks only on zones which we primary + -q --quiet no output for OK zones + -r --repeat repeat warnings for all sources of imperfect data + -v --verbose extra verbose info about each zone + -C|--config 'f', 'servers' => [ ], }; - progress(sprintf "%-40s %s", $zone, $$cfg{'style_p'}); + progress(1, sprintf "%-20s %s", $zone, $$cfg{'style_p'}); if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) { eval { if ($localonly && $cfg->{'s'} =~ m/f/) { zone_warning("foreign zone specified with -l",''); - } elsif ($cfg->{'s'} =~ m/\*/ || - ($localonly && $cfg->{'s'} !~ m/p/)) { + } elsif ($localonly && $cfg->{'s'} !~ m/p/) { zone_check_local(); } else { zone_check_full(); @@ -291,18 +297,26 @@ sub process_zones (@) { $output_contents{$$cfg{'output'}} .= zone_output() if $install; } - print STDERR "$quis: $warnings warnings\n" or die $! - if $warnings; + if ($warnings) { + printf STDERR ("%s: %d warning(s) in %d zone(s);". + " %d zone(s) checked ok.\n", + $quis, + $warnings, + scalar(keys %zone_warnings), + scalar(@zones - keys %zone_warnings)); + } else { + progress(1, sprintf "%d zone(s) checked ok", scalar @zones); + } } use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ] use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ] use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ] -use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ] +use vars qw(%soas); # $soa{"$serial $origin"} = [ $whosaidandwhy ] use vars qw(%addr_is_ok %warned); use vars qw($delg_to_us); -use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...) -use vars qw(@to_check_soa); # ($addr,$whyask, ...) +use vars qw(@to_check); # ($addr,$whyask,$name_if_auth,$glueless_ok, ...) +use vars qw(@to_check_soa); # ($addr,$whyask,$name,$is_ns, ...) sub zone_warning ($$) { my ($w,$o) = @_; @@ -316,6 +330,7 @@ sub zone_warning ($$) { $w .= " ($o)" if length $o; print STDERR "$zone: warning: $w\n" or die $!; $warnings++; + $zone_warnings{$zone}++; return 1; } @@ -336,25 +351,34 @@ sub zone_reset() { } 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); + my ($super_zone, @start_nsnames, $start_ww, + $start_ns, @start_ns_addrs, $s, $wa, $name_if_auth, + %nsrrset_checked, %soa_checked, $addr, $glueless_ok, + $rcode, $name, $is_ns); - $super_zone= $zone; - for (;;) { - debug_trace("zone $zone superzone $super_zone"); - $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n"; - ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06'); - last if !$rcode; + if ($cfg->{'s'} !~ m/\*/) { + $super_zone= $zone; + for (;;) { + debug_trace("zone $zone superzone $super_zone"); + $super_zone eq '.' + and die "no superzone ? ($super_zone)\n"; + $super_zone =~ s/^[^.]+\.// + or $super_zone= '.'; + ($rcode,@start_nsnames)= + lookup($super_zone,'ns-','06',"superzone search"); + last if !$rcode; + } + $start_ww= "server for $super_zone"; + } else { + ($rcode,@start_nsnames)= + lookup($zone,'ns-','0',"initial nameserver search"); + $start_ww= "nameserver for $zone"; } - for $super_ns (@super_nsnames) { - $super_ns= lc $super_ns; - ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0'); - foreach $addr (@super_ns_addrs) { - push @to_check, - $addr, - "$super_ns, server for $super_zone", - 0, 0; + for $start_ns (@start_nsnames) { + $start_ns= lc $start_ns; + ($rcode,@start_ns_addrs)= lookup($start_ns,'a','0',"$start_ww"); + foreach $addr (@start_ns_addrs) { + push @to_check, $addr, "$start_ns, $start_ww", undef, 0; } } for (;;) { @@ -363,13 +387,14 @@ sub zone_investigate() { # we might set nsrrset_checked due to a glueless_ok check, # and then not check for gluefulness later. 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; + if (($addr,$wa,$name_if_auth,$glueless_ok,@to_check) = @to_check) { + push @to_check_soa, $addr, $wa, $name_if_auth, 1, + if defined $name_if_auth; next if $nsrrset_checked{$addr}++; - zone_check_nsrrset($addr, $wa, $is_auth, $glueless_ok); - } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) { + zone_check_nsrrset($addr, $wa, $name_if_auth, $glueless_ok); + } elsif (($addr,$wa,$name,$is_ns,@to_check_soa) = @to_check_soa) { next if $soa_checked{$addr}++; - zone_check_soa($addr, $wa, "NS [$addr]"); + zone_check_soa($addr,$wa,$name,$is_ns); } else { last; } @@ -377,8 +402,9 @@ sub zone_investigate() { } sub zone_check_nsrrset ($$$$) { - my ($uaddr,$wa, $is_auth, $glueless_ok) = @_; - my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths, $wwn, $ww); + my ($uaddr,$wa, $name_if_auth, $glueless_ok) = @_; + my (@s, $s, $a, %s2g, @glue, $glue, $delgs_or_auths, $wwn, $ww); + my ($rcode); $ww= "[$uaddr] $wa"; verbose("checking delegation by $ww"); dig(sub { @@ -386,8 +412,7 @@ sub zone_check_nsrrset ($$$$) { $s2g{lc $dig_rdata} = [ ]; } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) { $wwn= "in glue from $ww"; - push @to_check, $dig_rdata, "$dig_owner, $wwn", 1, 0; - zone_server_addr($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0); + zone_server_queue($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0); push @{ $s2g{$dig_owner} }, $dig_rdata; } }, @@ -401,37 +426,55 @@ sub zone_check_nsrrset ($$$$) { } @s= sort keys %s2g; foreach $s (@s) { - $delg_to_us=1 if grep { $s eq $_ } @{ $cfg->{'self_ns'} }; + zone_ns_name($s,$ww); @glue= @{ $s2g{$s} }; if (!@glue) { zone_warning("glueless NS $s", $ww) unless $glueless_ok || !$needglue || - grep { has_suffix_of($s,".$_"); } @conv_glueless; - next; + grep { has_suffix_of($zone,".$_"); } + @{ $cfg->{'conv_glueless'} }; + ($rcode,@glue)= lookup($s,'a','0',"glueless NS from $ww"); + foreach $a (@glue) { + $wwn= "glueless NS from $ww"; + zone_server_queue($a,$s,$wwn,"NS [$uaddr]",0); + } } $glue= join ' ', sort @glue; push @{ $glue{$s}{$glue} }, $ww; } $s= join ' ', @s; - $delgs_or_auths= $is_auth ? \%auths : \%delgs; + $delgs_or_auths= defined($name_if_auth) ? \%auths : \%delgs; push @{ $delgs_or_auths->{$s} }, $ww; } +sub zone_ns_name ($$) { + my ($name,$ww) = @_; + my ($cg); + $delg_to_us=1 if grep { $name eq $_ } @{ $cfg->{'self_ns'} }; + foreach $cg (@{ $cfg->{'conv_glueless'} }) { + zone_warning("nameserver $name in serverless-glueless". + " namespace area $cg", + $ww) + if has_suffix_of(".$name",".$cg"); + } + zone_warning("published server, as $name, but configured as stealth", + $ww) + if $cfg->{'s'} =~ m/u/ && + grep { $_ eq $name } + @{ $cfg->{'self_ns'} }, @{ $cfg->{'self_soa'} }; +} + +sub zone_server_queue ($$$$$) { + my ($addr,$name,$wwn,$wwq,$is_soa) = @_; + zone_server_addr($addr,$name,$wwn,$wwq,$is_soa); + push @to_check, $addr, "$name, $wwn", $name, $is_soa; +} + sub zone_server_addr ($$$$$) { my ($addr,$name,$ww,$wwq,$is_soa) = @_; - my ($cg); debug_trace("zone_server_addr ".join '|',@_); $addr_is_ok{$addr}= "$name ($wwq)" if $is_soa || $cfg->{'s'} =~ m/u/; - foreach $cg (@conv_glueless) { - next unless has_suffix_of(".$name",".$cg"); - zone_warning("nameserver [$addr] $name in serverless-glueless". - " namespace area $cg", - $ww); - } - zone_warning("configured as stealth but we [$addr] $name are published", - $ww) - if $cfg->{'s'} =~ m/u/ && grep { $_ eq $addr } @self_addr; zone_warning("forbidden nameserver address [$addr] $name",$ww) if grep { $_ eq $addr } @{ $cfg->{'forbid_addr'} }; @@ -457,10 +500,10 @@ sub zone_server_addr ($$$$$) { $delg_to_us=1 if $addr_is_self && !$is_soa; } -sub zone_check_soa ($$$) { - my ($uaddr,$wa,$waq) = @_; - my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr,$ww,$wwn); - verbose("checking service at [$uaddr] $waq"); +sub zone_check_soa ($$$$) { + my ($uaddr,$wa,$name,$is_ns) = @_; + my ($lame,$serial,$origin,$got,$rcode,@soa_addrs,$soa_addr,$ww,$wwn); + verbose("checking service at [$uaddr] $name"); $lame= 'dead or lame'; $ww= "[$uaddr] $wa"; dig(sub { @@ -469,19 +512,20 @@ sub zone_check_soa ($$$) { } 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; + $got =~ m/^(\d+) (\S+)$/ or die "$got ?"; + ($serial,$origin) = ($1,$2); } }, $zone,'soa',$uaddr); $lame= 'broken' if !$lame && !defined $origin; if ($lame) { zone_warning("$lame server [$uaddr]",$wa); return; } + progress(2, sprintf "%-16s %46s has %s%s", + $zone, "$name [$uaddr]", $serial, $is_ns ? '' : '*'); push @{ $soas{$got} }, $ww; - ($rcode,@soa_addrs)= lookup($origin,'a','0'); + ($rcode,@soa_addrs)= lookup($origin,'a','0',"SOA ORIGIN"); $wwn= "SOA ORIGIN from $ww"; foreach $soa_addr (@soa_addrs) { - zone_server_addr($soa_addr,$origin,$wwn,"SOA [$uaddr]",1); - push @to_check, $soa_addr, "$origin, $wwn"; + zone_server_queue($soa_addr,$origin,$wwn,"SOA [$uaddr]",1); } } @@ -493,7 +537,7 @@ sub zone_consistency() { foreach $h (keys %glue) { zone_consistency_set("glue for $h", $glue{$h}); } - zone_consistency_set("SOA ORIGIN and SERIAL",\%soas); + zone_consistency_set("serial number and/or SOA ORIGIN",\%soas); $self_soa= $cfg->{'self_soa'}; } @@ -539,10 +583,14 @@ sub zone_check_local () { sub zone_servers_simplefind () { my ($rcode,@nsnames,$ns,@soas,$origin); - ($rcode,@nsnames)= lookup($zone,'ns-','0'); - foreach $ns (@nsnames) { zone_server_simple($ns,'NS',0); } + ($rcode,@nsnames)= lookup($zone,'ns-','0',"zone's servers"); + foreach $ns (@nsnames) { + zone_ns_name($ns,"NS"); + zone_server_simple($ns,'NS',0); + } + $delgs{join ' ', sort @nsnames} = [ "zone's servers" ]; - ($rcode,@soas)= lookup($zone,'soa','0'); + ($rcode,@soas)= lookup($zone,'soa','0',"SOA ORIGIN"); die "multiple SOA RRs in set! @soas ?" if @soas!=1; $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_"; zone_server_simple(domain_canon($1,"lookup $zone SOA"),'SOA',1); @@ -551,7 +599,8 @@ sub zone_servers_simplefind () { sub zone_server_simple ($$$) { my ($name,$ww,$is_soa) = @_; my ($rcode,@addrs,$addr); - ($rcode,@addrs)= lookup($name,'a','0'); + ($rcode,@addrs)= lookup($name,'a','0', "server - ". + ($is_soa ? "SOA ORIGIN" : "NS")); foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); } } @@ -635,13 +684,15 @@ sub debug_trace ($) { sub has_suffix_of ($$) { my ($whole,$suffix) = @_; + debug_trace("has_suffix_of $whole $suffix"); return 0 if length $whole < length $suffix; return 0 if substr($whole, length($whole) - length($suffix)) ne $suffix; + debug_trace("has_suffix_of $whole $suffix YES"); return 1; } -sub lookup ($$$) { - my ($domain,$type,$okrcodes) = @_; +sub lookup ($$$$) { + my ($domain,$type,$okrcodes,$w) = @_; my ($c,$h,@result); debug_trace("lookup ==> (->$okrcodes) $domain $type"); $h= new IO::Handle; @@ -649,20 +700,19 @@ sub lookup ($$$) { defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n"; if (!$c) { exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type", - '-',"$domain."; + '-',"$domain"; die "$quis: exec adnshost:\n $!\n"; } @result= $h->getlines(); $h->error and die "$quis: read from adnshost:\n $!\n"; chomp @result; $!=0; $h->close; - die "$quis: lookup -t$type $domain $okrcodes failed $? $! @result\n" + die "$quis: lookup -t$type $domain $okrcodes ($w) failed $? $! @result\n" if $! or $?&255 or $?>1536 or index($okrcodes,$?>>8)<0; debug_trace("lookup <== $? @result"); return ($?,@result); } - sub dig (&$$$) { my ($eachrr, $qowner,$qtype,$qaddr) = @_; # also pseudo-rr with type `flags:' @@ -713,7 +763,7 @@ sub dig (&$$$) { } 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($1,$digwhy).' '.$2; + $dig_rdata= $2.' '.domain_canon($1,$digwhy); } else { debug_trace("ignoring uknown RR type $dig_type"); next;