| 1 | # dns/trunk/DNSDB/ExportBIND.pm
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| 2 | # BIND data export/publication
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| 3 | # Call through DNSDB.pm's export() sub
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| 4 | ##
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| 5 | # $Id: ExportBIND.pm 901 2025-08-11 20:34:14Z kdeugau $
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| 6 | # Copyright 2022-2025 Kris Deugau <kdeugau@deepnet.cx>
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| 7 | #
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| 8 | # This program is free software: you can redistribute it and/or modify
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| 9 | # it under the terms of the GNU General Public License as published by
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| 10 | # the Free Software Foundation, either version 3 of the License, or
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| 11 | # (at your option) any later version.
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| 12 | #
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| 13 | # This program is distributed in the hope that it will be useful,
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| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | # GNU General Public License for more details.
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| 17 | #
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| 18 | # You should have received a copy of the GNU General Public License
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| 19 | # along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 | ##
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| 21 |
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| 22 | package DNSDB::ExportBIND;
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| 23 |
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| 24 | use strict;
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| 25 | use warnings;
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| 26 |
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| 27 | use DNSDB;
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| 28 |
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| 29 | sub export {
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| 30 | # expected to be a DNSDB object
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| 31 | my $dnsdb = shift;
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| 32 |
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| 33 | # to be a hash of views/locations, containing lists of zones
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| 34 | my %viewzones;
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| 35 |
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| 36 | # allow for future exports of subgroups of records
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| 37 | my $viewlist = $dnsdb->getLocList(curgroup => 1, full => 1);
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| 38 |
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| 39 |
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| 40 | ## export reverse zones
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| 41 |
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| 42 | my $soasth = $dnsdb->{dbh}->prepare("SELECT host,val,ttl,record_id,location FROM records WHERE rdns_id=? AND type=6");
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| 43 | # record order matters for reverse zones because we need to override larger templates with smaller ones.
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| 44 | my $recsth = $dnsdb->{dbh}->prepare(
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| 45 | "SELECT host,type,val,distance,weight,port,ttl,record_id,location,extract(epoch from stamp),expires,stampactive ".
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| 46 | "FROM records WHERE rdns_id=? AND NOT type=6 ".
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| 47 | "ORDER BY masklen(inetlazy(val)) DESC, inetlazy(val), record_id");
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| 48 |
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| 49 | # Fetch active zone list
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| 50 | my $revsth = $dnsdb->{dbh}->prepare("SELECT rdns_id,revnet,status,changed,default_location FROM revzones WHERE status=1 ".
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| 51 | "ORDER BY masklen(revnet),revnet DESC, rdns_id");
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| 52 | # Unflag changed zones, so we can maybe cache the export and not redo everything every time
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| 53 | my $zonesth = $dnsdb->{dbh}->prepare("UPDATE revzones SET changed='n' WHERE rdns_id=?");
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| 54 |
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| 55 | my %recflags; # need this to be independent for forward vs reverse zones, as they're not merged
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| 56 |
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| 57 | $revsth->execute();
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| 58 | while (my ($revid,$revzone,$revstat,$changed,$defloc) = $revsth->fetchrow_array) {
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| 59 | my $cidr = NetAddr::IP->new($revzone);
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| 60 |
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| 61 | ##fixme: convert logical revzone into .arpa name? maybe take a slice of showrev_arpa?
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| 62 | ##fixme: need to bodge logical non-octet-boundary revzones into octet-boundary revzones
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| 63 | ##fixme: do we do cache files? views balloon the file count stupidly
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| 64 | ## foreach $octetzone $cidr->split(octet-boundary)
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| 65 | ## loclist = SELECT DISTINCT location FROM records WHERE rdns_id = $zid AND inetlazy(val) <<= $octetzone
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| 66 |
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| 67 | #printf "non-octet? %s, %i\n", $cidr->masklen, $cidr->masklen % 8;
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| 68 |
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| 69 | # fetch a list of views/locations present in the zone. we need to publish a file for each one.
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| 70 | # in the event that no locations are present (~~ $viewlist is empty), /%view collapses to nothing in the zone path
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| 71 | my $tmplocs = $dnsdb->{dbh}->selectall_arrayref("SELECT DISTINCT location FROM records WHERE rdns_id = ?", undef, $revid);
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| 72 | my @loclist;
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| 73 | foreach my $tloc (@{$tmplocs}) {
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| 74 | push @loclist, ($tloc->[0] eq '' ? 'common' : $tloc->[0]);
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| 75 | }
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| 76 |
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| 77 | my %zonefiles; # zone file handles
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| 78 |
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| 79 | eval {
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| 80 |
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| 81 | ##fixme: use tmpfile module for more secure temp files? want the zone name at least in it anyway, not sure that works...
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| 82 | my $arpazone = DNSDB::_ZONE($cidr, 'ZONE', 'r', '.').($cidr->{isv6} ? '.ip6.arpa' : '.in-addr.arpa');
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| 83 | my $zfile = $cidr->network->addr."-".$cidr->masklen;
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| 84 | # my $cachefile = "$dnsdb->{exportcache}/$zfile";
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| 85 | # my $tmpcache = "$dnsdb->{exportcache}/tmp.$zfile.$$";
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| 86 | my $tmpcache = "tmp.$zfile.$$"; # safety net. don't overwrite a previous known-good file
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| 87 |
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| 88 | ##fixme: need to open separate zone files for aggregated metazones eg /22 or /14
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| 89 | foreach my $loc (@loclist) {
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| 90 | my $zfilepath = $dnsdb->{bind_export_reverse_zone_path};
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| 91 | $zfilepath =~ s/\%view/$loc/;
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| 92 | $zfilepath =~ s/\%zone/$zfile/;
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| 93 | $zfilepath =~ s/\%arpazone/$arpazone/;
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| 94 |
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| 95 | # Just In Case(TM)
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| 96 | $zfilepath =~ s,[^\w./-],_,g;
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| 97 |
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| 98 | # safety check, may need tweaking for race conditions
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| 99 | my $zpathbase = $zfilepath;
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| 100 | $zpathbase =~ s{/[^/]+$}{};
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| 101 | if (!-e $zpathbase) {
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| 102 | mkdir $zpathbase;
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| 103 | } else {
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| 104 | die "$zpathbase is not a directory\n" unless -d $zpathbase;
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| 105 | }
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| 106 |
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| 107 | # write fresh records if:
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| 108 | # - the zone contains records which expire in less than 10 minutes or became valid less than 10 minutes ago
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| 109 | # note, no need to multi-bump the serial
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| 110 | if ( ($dnsdb->{dbh}->selectrow_array("SELECT COUNT(*) FROM records WHERE rdns_id = ? AND ".
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| 111 | "stampactive='t' AND @(extract(epoch from stamp-now())) < 600", undef, $revid))[0] ) {
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| 112 | $changed = 1;
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| 113 | $dnsdb->_updateserial(rdns_id => $revid);
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| 114 | }
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| 115 | # - we are not using the cache
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| 116 | # if ($dnsdb->{usecache}
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| 117 | # - force_refresh is set
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| 118 | # - the zone has changed
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| 119 | # - the zone file does not exist
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| 120 | # - the zone file is empty
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| 121 | elsif ($dnsdb->{force_refresh} || $changed || !-e $zfilepath || -z $zfilepath) {
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| 122 | # if ($dnsdb->{usecache}) {
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| 123 | # open ZONECACHE, ">$tmpcache" or die "Error creating temporary file $tmpcache: $!\n";
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| 124 | # $zonefilehandle = *ZONECACHE;
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| 125 | # }
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| 126 | open $zonefiles{$loc}, ">", $zfilepath or die "Error creating temporary file $zfilepath: $!\n";
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| 127 |
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| 128 | # Header for human convenience
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| 129 | ##fixme? vary arpazone/cidr in header and error message per showrev_arpa, or possibly
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| 130 | # new dedicated setting, or possibly interact with with bind_export_fqdn?
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| 131 | printf {$zonefiles{$loc}} "; %s in view %s exported %s\n", $arpazone, $loc, scalar(localtime)
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| 132 | or die "Error writing header [$arpazone, '$loc']: $!\n";
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| 133 |
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| 134 | # Fetch the SOA separately as we publish it separately for each location with this loop,
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| 135 | # mainly because we want it first in the zone file
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| 136 | $soasth->execute($revid);
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| 137 | my ($soa_host, $soa_val, $soa_ttl, $soa_id, $soa_loc) = $soasth->fetchrow_array;
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| 138 |
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| 139 | ##fixme: do we even need @loclist passed in?
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| 140 | printrec_bind($dnsdb, \%zonefiles, \@loclist, $soa_id, 'y', \%recflags, $cidr,
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| 141 | $soa_host, 6, $soa_val, 0, 0, 0, $soa_ttl, $loc, '');
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| 142 |
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| 143 | } # if force_refresh etc
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| 144 |
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| 145 | # tag the zonefile for publication in the view
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| 146 | push @{$viewzones{$loc}}, $arpazone;
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| 147 |
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| 148 | } # foreach @loclist
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| 149 |
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| 150 | # now the meat of the records
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| 151 | $recsth->execute($revid);
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| 152 | while (my ($host, $type, $val, $dist, $weight, $port, $ttl, $recid, $loc, $stamp, $expires, $stampactive)
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| 153 | = $recsth->fetchrow_array) {
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| 154 | next if $recflags{$recid};
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| 155 |
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| 156 | # Spaces are evil.
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| 157 | $val =~ s/^\s+//;
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| 158 | $val =~ s/\s+$//;
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| 159 | if ($typemap{$type} ne 'TXT') {
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| 160 | # Leading or trailng spaces could be legit in TXT records.
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| 161 | $host =~ s/^\s+//;
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| 162 | $host =~ s/\s+$//;
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| 163 | }
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| 164 |
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| 165 | # Check for out-of-zone data
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| 166 | if ($val =~ /\.arpa$/) {
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| 167 | # val is non-IP
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| 168 | if ($val !~ /$arpazone$/) {
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| 169 | warn "Not exporting out-of-zone record $val $typemap{$type} $host, $ttl (zone $cidr)\n";
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| 170 | next;
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| 171 | }
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| 172 | } else {
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| 173 | my $ipval = new NetAddr::IP $val;
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| 174 | if (!$cidr->contains($ipval)) {
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| 175 | warn "Not exporting out-of-zone record $val $typemap{$type} $host, $ttl (zone $cidr)\n";
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| 176 | next;
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| 177 | }
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| 178 | } # is $val a raw .arpa name?
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| 179 |
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| 180 | printrec_bind($dnsdb, \%zonefiles, \@loclist, $recid, 'y', \%recflags, $revzone,
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| 181 | $host, $type, $val, $dist, $weight, $port, $ttl, $loc, $stamp, $expires, $stampactive);
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| 182 |
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| 183 | $recflags{$recid} = 1;
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| 184 |
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| 185 | } # while ($recsth)
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| 186 |
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| 187 | # if ($dnsdb->{usecache}) {
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| 188 | # close ZONECACHE; # force the file to be written
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| 189 | # # catch obvious write errors that leave an empty temp file
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| 190 | # if (-s $tmpcache) {
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| 191 | # rename $tmpcache, $cachefile
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| 192 | # or die "Error overwriting cache file $cachefile with temporary file: $!\n";
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| 193 | # }
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| 194 | # }
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| 195 |
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| 196 | };
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| 197 | if ($@) {
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| 198 | die "error writing ".($dnsdb->{usecache} ? 'new data for ' : '')."$revzone: $@\n";
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| 199 | # error! something borked, and we should be able to fall back on the old cache file
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| 200 | # report the error, somehow.
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| 201 | } else {
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| 202 | # mark zone as unmodified. Only do this if no errors, that way
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| 203 | # export failures should recover a little more automatically.
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| 204 | $zonesth->execute($revid);
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| 205 | }
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| 206 |
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| 207 | # if ($dnsdb->{usecache}) {
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| 208 | # # We've already made as sure as we can that a cached zone file is "good",
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| 209 | # # although possibly stale/obsolete due to errors creating a new one.
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| 210 | # eval {
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| 211 | # open CACHE, "<$cachefile" or die $!;
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| 212 | # print $datafile $_ or die "error copying cached $revzone to master file: $!" while <CACHE>;
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| 213 | # close CACHE;
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| 214 | # };
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| 215 | # die $@ if $@;
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| 216 | # }
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| 217 |
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| 218 | } # revsth->fetch
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| 219 |
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| 220 |
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| 221 |
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| 222 | ## and now the domains
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| 223 |
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| 224 | $soasth = $dnsdb->{dbh}->prepare("SELECT host,val,ttl,record_id,location FROM records WHERE domain_id=? AND type=6");
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| 225 | # record order needs to match reverse zone ordering for IP values, or A+PTR
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| 226 | # template records don't cascade/expand correctly to match the reverse zones.
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| 227 | # order by record_id at least makes the zone consistent from export to export,
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| 228 | # otherwise the records could (theoretically) be returned in any old order by
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| 229 | # the DB engine
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| 230 | # ordering by nominal parent-child label hierarchy (as actually found live
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| 231 | # in some AXFRed zone files) would take a lot of chewing on data
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| 232 | $recsth = $dnsdb->{dbh}->prepare(
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| 233 | "SELECT host,type,val,distance,weight,port,ttl,record_id,location,extract(epoch from stamp),expires,stampactive ".
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| 234 | "FROM records WHERE domain_id=? AND NOT type=6 ".
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| 235 | "ORDER BY masklen(inetlazy(val)) DESC, inetlazy(val), record_id");
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| 236 | # "FROM records WHERE domain_id=? AND type < 65280"); # Just exclude all types relating to rDNS
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| 237 |
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| 238 | # Fetch active zone list
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| 239 | my $domsth = $dnsdb->{dbh}->prepare("SELECT domain_id,domain,status,changed,default_location FROM domains WHERE status=1 ".
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| 240 | "ORDER BY domain_id");
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| 241 | # Unflag changed zones, so we can maybe cache the export and not redo everything every time
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| 242 | $zonesth = $dnsdb->{dbh}->prepare("UPDATE domains SET changed='n' WHERE domain_id=?");
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| 243 |
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| 244 | # Clear %reclfags, since we explicitly want to NOT carry "I've published this
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| 245 | # record" over from rDNS, since we have to regenerate any templates for forward
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| 246 | # zones. downside: small mismatches due to overridden entries. not sure how
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| 247 | # best to manage that. :/
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| 248 | ##fixme: selectively delete entries to allow template_always_publish_a to flag
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| 249 | # whether extra A records get published or not. should default to not (nb, of
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| 250 | # *course* that's the complex case) to match original tinydns template masking behaviour
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| 251 | # %recflags = ();
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| 252 |
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| 253 | $domsth->execute();
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| 254 | while (my ($domid,$domain,$domstat,$changed) = $domsth->fetchrow_array) {
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| 255 |
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| 256 | # fetch a list of views/locations present in the zone. we need to publish a file for each one.
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| 257 | # in the event that no locations are present (~~ $viewlist is empty), /%view collapses to nothing in the zone path
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| 258 | my $tmplocs = $dnsdb->{dbh}->selectall_arrayref("SELECT DISTINCT location FROM records WHERE domain_id = ?", undef, $domid);
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| 259 | my @loclist;
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| 260 | foreach my $tloc (@{$tmplocs}) {
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| 261 | push @loclist, ($tloc->[0] eq '' ? 'common' : $tloc->[0]);
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| 262 | }
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| 263 |
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| 264 | my %zonefiles; # zone file handles
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| 265 |
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| 266 | eval {
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| 267 |
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| 268 | ##fixme: use tmpfile module for more secure temp files? want the zone name at least in it anyway, not sure that works...
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| 269 | my $zfile = $domain; # can probably drop this intermediate
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| 270 | my $tmpcache = "tmp.$zfile.$$"; # safety net. don't overwrite a previous known-good file
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| 271 |
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| 272 | foreach my $loc (@loclist) {
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| 273 | my $zfilepath = $dnsdb->{bind_export_zone_path};
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| 274 | $zfilepath =~ s/\%view/$loc/;
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| 275 | $zfilepath =~ s/\%zone/$zfile/;
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| 276 |
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| 277 | # Just In Case(TM)
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| 278 | $zfilepath =~ s,[^\w./-],_,g;
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| 279 |
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| 280 | # safety check, may need tweaking for race conditions
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| 281 | my $zpathbase = $zfilepath;
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| 282 | $zpathbase =~ s{/[^/]+$}{};
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| 283 | if (!-e $zpathbase) {
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| 284 | mkdir $zpathbase;
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| 285 | } else {
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| 286 | die "$zpathbase is not a directory\n" unless -d $zpathbase;
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| 287 | }
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| 288 |
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| 289 | # write fresh records if:
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| 290 | # - the zone contains ALIAS pseudorecords, which need to cascade changes from the upstream CNAME farm at every opportunity
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| 291 | if ( ($dnsdb->{dbh}->selectrow_array("SELECT count(*) FROM records WHERE domain_id = ? AND type=65300", undef, $domid))[0] ) {
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| 292 | $changed = 1; # abuse this flag for zones with ALIAS records
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| 293 | # also update the serial number, because while it shouldn't matter purely for serving
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| 294 | # records, it WILL matter if AXFR becomes part of the publishing infrastructure
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| 295 | $dnsdb->_updateserial(domain_id => $domid);
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| 296 | }
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| 297 | # - the zone contains records which expire in less than 10 minutes or became valid less than 10 minutes ago
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| 298 | # note, no need to multi-bump the serial
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| 299 | elsif ( ($dnsdb->{dbh}->selectrow_array("SELECT COUNT(*) FROM records WHERE domain_id = ? AND ".
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| 300 | "stampactive='t' AND @(extract(epoch from stamp-now())) < 600", undef, $domid))[0] ) {
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| 301 | $changed = 1;
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| 302 | $dnsdb->_updateserial(domain_id => $domid);
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| 303 | }
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| 304 | # - we are not using the cache
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| 305 | # if ($dnsdb->{usecache}
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| 306 | # - force_refresh is set
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| 307 | # - the zone has changed
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| 308 | # - the zone file does not exist
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| 309 | # - the zone file is empty
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| 310 | # if (!$self->{usecache} || $self->{force_refresh} || $changed || !-e $cachefile || -z $cachefile) {
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| 311 | if ($dnsdb->{force_refresh} || $changed || !-e $zfilepath || -z $zfilepath) {
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| 312 | # if ($self->{usecache}) {
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| 313 | # open ZONECACHE, ">$tmpcache" or die "Error creating temporary file $tmpcache: $!\n";
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| 314 | # $zonefilehandle = *ZONECACHE;
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| 315 | # }
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| 316 | open $zonefiles{$loc}, ">", $zfilepath or die "Error creating temporary file $zfilepath: $!\n";
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| 317 |
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| 318 | # Header for human convenience
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| 319 | printf {$zonefiles{$loc}} "; %s in view %s exported %s\n", $domain, $loc, scalar(localtime)
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| 320 | or die "Error writing header [$domain, '$loc']: $!\n";
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| 321 |
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| 322 | # Fetch the SOA separately as we publish it separately for each location with this loop,
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| 323 | # mainly because we want it first in the zone file
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| 324 | $soasth->execute($domid);
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| 325 | my ($soa_host, $soa_val, $soa_ttl, $soa_id, $soa_loc) = $soasth->fetchrow_array;
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| 326 |
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| 327 | ##fixme: do we even need @loclist passed in?
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| 328 | printrec_bind($dnsdb, \%zonefiles, \@loclist, $soa_id, 'n', \%recflags, $domain,
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| 329 | $soa_host, 6, $soa_val, 0, 0, 0, $soa_ttl, $loc, '');
|
|---|
| 330 |
|
|---|
| 331 | } # if force_refresh etc
|
|---|
| 332 |
|
|---|
| 333 | # tag the zonefile for publication in the view
|
|---|
| 334 | push @{$viewzones{$loc}}, $domain;
|
|---|
| 335 |
|
|---|
| 336 | } # foreach @loclist
|
|---|
| 337 |
|
|---|
| 338 | # now the meat of the records
|
|---|
| 339 | $recsth->execute($domid);
|
|---|
| 340 | while (my ($host,$type,$val,$dist,$weight,$port,$ttl,$recid,$loc,$stamp,$expires,$stampactive) = $recsth->fetchrow_array) {
|
|---|
| 341 | ##work need more subtle check - $recflags{$val} eq 'ptr' maybe?
|
|---|
| 342 | next if $recflags{$recid};
|
|---|
| 343 | #next if $recflags{$val} && $type == 65280;# && !$dnsdb->{template_always_publish_a};
|
|---|
| 344 |
|
|---|
| 345 | # Spaces are evil.
|
|---|
| 346 | $host =~ s/^\s+//;
|
|---|
| 347 | $host =~ s/\s+$//;
|
|---|
| 348 | if ($typemap{$type} ne 'TXT') {
|
|---|
| 349 | # Leading or trailng spaces could be legit in TXT records.
|
|---|
| 350 | $val =~ s/^\s+//;
|
|---|
| 351 | $val =~ s/\s+$//;
|
|---|
| 352 | }
|
|---|
| 353 |
|
|---|
| 354 | # Check for out-of-zone data
|
|---|
| 355 | $host = $domain if $host eq '@';
|
|---|
| 356 | if ($domain !~ /\.rpz$/ && $host !~ /$domain$/i) {
|
|---|
| 357 | warn "Not exporting out-of-zone record $host $type $val, $ttl (zone $domain)\n";
|
|---|
| 358 | next;
|
|---|
| 359 | }
|
|---|
| 360 |
|
|---|
| 361 | printrec_bind($dnsdb, \%zonefiles, \@loclist, $recid, 'n', \%recflags, $domain,
|
|---|
| 362 | $host, $type, $val, $dist, $weight, $port, $ttl, $loc, $stamp, $expires, $stampactive);
|
|---|
| 363 |
|
|---|
| 364 | $recflags{$recid} = 1;
|
|---|
| 365 |
|
|---|
| 366 | } # while ($recsth)
|
|---|
| 367 |
|
|---|
| 368 | # retrieve NS records for subdomains. not strictly required in current production
|
|---|
| 369 | # context but may matter sometime down the road
|
|---|
| 370 | my $subnssth = $dnsdb->{dbh}->prepare("SELECT r.host,r.val,r.ttl,r.record_id,r.loc,r.stamp,r.expires,r.stampactive ".
|
|---|
| 371 | "FROM records r ".
|
|---|
| 372 | "JOIN domains d ON r.domain_id=d.domain_id ".
|
|---|
| 373 | "WHERE r.type=2 AND d.domain LIKE ?");
|
|---|
| 374 | $subnssth->execute('%.'.$domain);
|
|---|
| 375 | while (my ($host,$val,$ttl,$recid,$loc,$stamp,$expires,$stampactive) = $subnssth->fetchrow_array) {
|
|---|
| 376 | printrec_bind($dnsdb, \%zonefiles, \@loclist, $recid, 'n', \%recflags, $domain,
|
|---|
| 377 | $host, 2, $val, '', '', '', $ttl, $loc, $stamp, $expires, $stampactive);
|
|---|
| 378 | } # subdomain-ns-recsth
|
|---|
| 379 |
|
|---|
| 380 |
|
|---|
| 381 | # if ($self->{usecache}) {
|
|---|
| 382 | # close ZONECACHE; # force the file to be written
|
|---|
| 383 | # # catch obvious write errors that leave an empty temp file
|
|---|
| 384 | # if (-s $tmpcache) {
|
|---|
| 385 | # rename $tmpcache, $cachefile
|
|---|
| 386 | # or die "Error overwriting cache file $cachefile with temporary file: $!\n";
|
|---|
| 387 | # }
|
|---|
| 388 | # }
|
|---|
| 389 |
|
|---|
| 390 | # } # if $changed or cache filesize is 0
|
|---|
| 391 |
|
|---|
| 392 | };
|
|---|
| 393 | if ($@) {
|
|---|
| 394 | die "error writing ".($dnsdb->{usecache} ? 'new data for ' : '')."$domain: $@\n";
|
|---|
| 395 | # error! something borked, and we should be able to fall back on the old cache file
|
|---|
| 396 | # report the error, somehow.
|
|---|
| 397 | } else {
|
|---|
| 398 | # mark zone as unmodified. Only do this if no errors, that way
|
|---|
| 399 | # export failures should recover a little more automatically.
|
|---|
| 400 | $zonesth->execute($domid);
|
|---|
| 401 | }
|
|---|
| 402 |
|
|---|
| 403 | # if ($dnsdb->{usecache}) {
|
|---|
| 404 | # # We've already made as sure as we can that a cached zone file is "good",
|
|---|
| 405 | # # although possibly stale/obsolete due to errors creating a new one.
|
|---|
| 406 | # eval {
|
|---|
| 407 | # open CACHE, "<$cachefile" or die $!;
|
|---|
| 408 | # print $datafile $_ or die "error copying cached $revzone to master file: $!" while <CACHE>;
|
|---|
| 409 | # close CACHE;
|
|---|
| 410 | # };
|
|---|
| 411 | # die $@ if $@;
|
|---|
| 412 | # }
|
|---|
| 413 |
|
|---|
| 414 | } # domsth->fetch
|
|---|
| 415 |
|
|---|
| 416 |
|
|---|
| 417 |
|
|---|
| 418 | # Write the view configuration last, because otherwise we have to be horribly inefficient
|
|---|
| 419 | # at figuring out which zones are visible/present in which views
|
|---|
| 420 | if ($viewlist) {
|
|---|
| 421 | my $tmpconf = "$dnsdb->{bind_export_conf_path}.$$"; ##fixme: split filename for prefixing
|
|---|
| 422 | open BINDCONF, ">", $tmpconf;
|
|---|
| 423 |
|
|---|
| 424 | foreach my $view (@{$viewlist}, { location => 'common', iplist => '' }) {
|
|---|
| 425 | #print Dumper($view);
|
|---|
| 426 | print BINDCONF "view $view->{location} {\n";
|
|---|
| 427 | # print "view $view->{location} {\n";
|
|---|
| 428 | # could also use an acl { ... }; statement, then match-clients { aclname; };, but that gets hairy
|
|---|
| 429 | # note that some semantics of data visibility need to be handled by the record export, since it's
|
|---|
| 430 | # not 100% clear if the semantics of a tinydns view with an empty IP list (matches anyone) are the
|
|---|
| 431 | # same as a BIND view with match-clients { any; };
|
|---|
| 432 | if ($view->{iplist}) {
|
|---|
| 433 | print BINDCONF " match-clients { ".join("; ", $view->{iplist})."; };\n";
|
|---|
| 434 | # print " match-clients { ".join("; ", split(/[\s,]+/, $view->{iplist}))."; };\n";
|
|---|
| 435 | } else {
|
|---|
| 436 | print BINDCONF " match-clients { any; };\n";
|
|---|
| 437 | # print " match-clients { any; };\n";
|
|---|
| 438 | }
|
|---|
| 439 | foreach my $zone (@{$viewzones{$view->{location}}}) {
|
|---|
| 440 | ##fixme: notify settings, maybe per-zone?
|
|---|
| 441 | print BINDCONF qq( zone "$zone" IN {\n\ttype master;\n\tnotify no;\n\tfile "db.$zone";\n };\n);
|
|---|
| 442 | # print qq( zone "$zone" IN {\n\ttype master;\n\tnotify no;\n\tfile "db.$zone";\n };\n);
|
|---|
| 443 | }
|
|---|
| 444 | print BINDCONF "};\n\n";
|
|---|
| 445 | # print "};\n\n";
|
|---|
| 446 | } # foreach @$viewlist
|
|---|
| 447 | rename $tmpconf, $dnsdb->{bind_export_conf_path};
|
|---|
| 448 | } # if $viewlist
|
|---|
| 449 |
|
|---|
| 450 | } # export()
|
|---|
| 451 |
|
|---|
| 452 |
|
|---|
| 453 | # Print individual records in BIND format
|
|---|
| 454 | sub printrec_bind {
|
|---|
| 455 | my $dnsdb = shift;
|
|---|
| 456 |
|
|---|
| 457 | # my ($zonefiles, $recid, $revrec, $loclist, $zone, $host, $type, $val, $distance, $weight, $port, $ttl,
|
|---|
| 458 | my ($zonefiles, $loclist, $recid, $revrec, $recflags, $zone, $host, $type, $val, $distance, $weight, $port, $ttl,
|
|---|
| 459 | $loc, $stamp, $expires, $stampactive) = @_;
|
|---|
| 460 |
|
|---|
| 461 | # Just In Case something is lingering in the DB
|
|---|
| 462 | $loc = '' if !$loc;
|
|---|
| 463 |
|
|---|
| 464 | ## Records that are valid only before or after a set time
|
|---|
| 465 | # Note that BIND-style zone files fundamentally don't support this directly
|
|---|
| 466 | # unlike tinydns, as it's not a native feature/function. Dropping TTLs to
|
|---|
| 467 | # 15s or so is the best we can do for expiry. "Valid-after" is only as good
|
|---|
| 468 | # as the export cron job timing.
|
|---|
| 469 | if ($stampactive) {
|
|---|
| 470 | my $now = time();
|
|---|
| 471 | if ($expires) {
|
|---|
| 472 | # record expires at $stamp; decide if we need to keep the TTL on file
|
|---|
| 473 | # or set it to 15 so the record falls out of caches quickly sometime
|
|---|
| 474 | # around the nominal expiry time.
|
|---|
| 475 |
|
|---|
| 476 | # For weirdos who set huge TTLs, cap the TTL at one day. 30+ years ago
|
|---|
| 477 | # long TTLs made sense when even DNS had a measurable cost in small
|
|---|
| 478 | # networks; today DNS is below the noise floor in all but the largest
|
|---|
| 479 | # networks and systems.
|
|---|
| 480 | my $ahead = (86400 < $ttl*2 ? 86400 : $ttl*2);
|
|---|
| 481 | if (($now + $ahead) < $stamp) {
|
|---|
| 482 | # more than 2x TTL OR more than one day (whichever is less) from expiry time; publish normal record
|
|---|
| 483 | } elsif ($now > $stamp) {
|
|---|
| 484 | # record has expired; return early as we don't need to publish anything
|
|---|
| 485 | return;
|
|---|
| 486 | } else {
|
|---|
| 487 | # less than 2x TTL from expiry time, set a short TTL
|
|---|
| 488 | $ttl = $dnsdb->{bind_export_autoexpire_ttl};
|
|---|
| 489 | }
|
|---|
| 490 | } else {
|
|---|
| 491 | # record is "active after"; return unless it's now after the nominal validity timestamp.
|
|---|
| 492 | return unless $now >= $stamp;
|
|---|
| 493 | }
|
|---|
| 494 | } # if $stampactive
|
|---|
| 495 |
|
|---|
| 496 | ## And now to the records!
|
|---|
| 497 |
|
|---|
| 498 | if ($typemap{$type} eq 'SOA') {
|
|---|
| 499 | # host contains pri-ns:responsible
|
|---|
| 500 | # val is abused to contain refresh:retry:expire:minttl
|
|---|
| 501 | # let's be explicit about abusing $host and $val
|
|---|
| 502 | my ($email, $primary) = (split /:/, $host)[0,1];
|
|---|
| 503 | my ($refresh, $retry, $expire, $min_ttl) = (split /:/, $val)[0,1,2,3];
|
|---|
| 504 | my $serial = 0; # fail less horribly than leaving it empty?
|
|---|
| 505 | # just snarfing the right SOA serial for the zone type
|
|---|
| 506 | if ($revrec eq 'y') {
|
|---|
| 507 | ($serial) = $dnsdb->{dbh}->selectrow_array("SELECT zserial FROM revzones WHERE revnet=?", undef, $zone);
|
|---|
| 508 | } else {
|
|---|
| 509 | ($serial) = $dnsdb->{dbh}->selectrow_array("SELECT zserial FROM domains WHERE domain=?", undef, $zone);
|
|---|
| 510 | } # revrec <> 'y'
|
|---|
| 511 | # suppress a "uninitialized value" warning. should be impossible but...
|
|---|
| 512 | # abuse hours as the last digit pair of the serial for simplicity
|
|---|
| 513 | ##fixme?: alternate SOA serial schemes?
|
|---|
| 514 | $serial = strftime("%Y%m%d%H", localtime()) if !$serial;
|
|---|
| 515 | $primary .= "." if $primary !~ /\.$/;
|
|---|
| 516 | $email .= "." if $email !~ /\.$/;
|
|---|
| 517 | # print *{$zonefiles->{$loc}} "Z$zone:$primary:$email:$serial:$refresh:$retry:$expire:$min_ttl:$ttl:$stamp:$loc\n"
|
|---|
| 518 | # or die $!;
|
|---|
| 519 | # print *{$zonefiles->{$loc}} "$zone $ttl IN SOA $primary $email ( $serial $refresh $retry $expire $min_ttl )\n"
|
|---|
| 520 | # or die "couldn't write $zone SOA: $!";
|
|---|
| 521 |
|
|---|
| 522 | # Prepare the body of the record
|
|---|
| 523 | my $recdata = "$ttl IN SOA $primary $email ( $serial $refresh $retry $expire $min_ttl )\n";
|
|---|
| 524 |
|
|---|
| 525 | # ... and prepend the zone name FQDN
|
|---|
| 526 | if ($revrec eq 'y') {
|
|---|
| 527 | my $zone2 = DNSDB::_ZONE($zone, 'ZONE', 'r', '.').($zone->{isv6} ? '.ip6.arpa' : '.in-addr.arpa');
|
|---|
| 528 | $recdata = "$zone2. $recdata";
|
|---|
| 529 | } else {
|
|---|
| 530 | $recdata = "$zone. $recdata";
|
|---|
| 531 | }
|
|---|
| 532 |
|
|---|
| 533 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 534 | } # SOA
|
|---|
| 535 |
|
|---|
| 536 | elsif ($typemap{$type} eq 'A') {
|
|---|
| 537 | ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
|
|---|
| 538 | # print $datafile "+$host:$val:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 539 | # print {$zonefiles->{$loc}} "$host $ttl IN A $val\n" or die $!;
|
|---|
| 540 | my $recdata = "$host. $ttl IN A $val\n";
|
|---|
| 541 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 542 | } # A
|
|---|
| 543 |
|
|---|
| 544 | elsif ($typemap{$type} eq 'NS') {
|
|---|
| 545 | if ($revrec eq 'y') {
|
|---|
| 546 | $val = NetAddr::IP->new($val);
|
|---|
| 547 |
|
|---|
| 548 | ##fixme: conversion for sub-/24 delegations in reverse zones?
|
|---|
| 549 | # if (!$val->{isv6} && ($val->masklen > 24)) {
|
|---|
| 550 | # }
|
|---|
| 551 |
|
|---|
| 552 | my $val2 = DNSDB::_ZONE($val, 'ZONE', 'r', '.').($val->{isv6} ? '.ip6.arpa' : '.in-addr.arpa');
|
|---|
| 553 | $host .= "." if $host !~ /\.$/;
|
|---|
| 554 | my $recdata = "$val2. $ttl IN NS $host\n";
|
|---|
| 555 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 556 |
|
|---|
| 557 | } else {
|
|---|
| 558 | my $recdata = "$host. $ttl IN NS $val.\n";
|
|---|
| 559 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 560 | }
|
|---|
| 561 | } # NS
|
|---|
| 562 |
|
|---|
| 563 | elsif ($typemap{$type} eq 'AAAA') {
|
|---|
| 564 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
|
|---|
| 565 | # print {$zonefiles->{$loc}} "$host $ttl IN AAAA $val\n" or die $!;
|
|---|
| 566 | my $recdata = "$host. $ttl IN AAAA $val\n";
|
|---|
| 567 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 568 | } # AAAA
|
|---|
| 569 |
|
|---|
| 570 | elsif ($typemap{$type} eq 'MX') {
|
|---|
| 571 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
|
|---|
| 572 | # print {$zonefiles->{$loc}} "$host $ttl IN MX $distance $val\n" or die $!;
|
|---|
| 573 | # should arguably swap host and val first, but MX records really don't make any sense in reverse zones, so any silliness that results from finding one doesn't much matter.
|
|---|
| 574 | my $recdata = "$host. $ttl IN MX $distance $val.\n";
|
|---|
| 575 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 576 | } # MX
|
|---|
| 577 |
|
|---|
| 578 | elsif ($typemap{$type} eq 'TXT') {
|
|---|
| 579 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
|
|---|
| 580 | # print {$zonefiles->{$loc}} "$host $ttl IN TXT \"$val\"\n" or die $!;
|
|---|
| 581 | # Clean up some lingering tinydns/VegaDNSisms
|
|---|
| 582 | DNSDB::_deoctal(\$val);
|
|---|
| 583 | my $recdata = "$host. $ttl IN TXT \"$val\"\n";
|
|---|
| 584 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 585 | } # TXT
|
|---|
| 586 |
|
|---|
| 587 | elsif ($typemap{$type} eq 'CNAME') {
|
|---|
| 588 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
|
|---|
| 589 | # print {$zonefiles->{$loc}} "$host $ttl IN CNAME $val\n" or die $!;
|
|---|
| 590 | my $recdata;
|
|---|
| 591 | if ($zone =~ /\.rpz$/) {
|
|---|
| 592 | # RPZ data stored and published as-is
|
|---|
| 593 | $recdata = "$host $ttl IN CNAME $val\n";
|
|---|
| 594 | } else {
|
|---|
| 595 | $recdata = "$host. $ttl IN CNAME $val.\n";
|
|---|
| 596 | }
|
|---|
| 597 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 598 | } # CNAME
|
|---|
| 599 |
|
|---|
| 600 | elsif ($typemap{$type} eq 'SRV') {
|
|---|
| 601 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
|
|---|
| 602 | # print {$zonefiles->{$loc}} "$host $ttl IN SRV $distance $weight $port $val\n" or die $!;
|
|---|
| 603 | my $recdata = "$host. $ttl IN SRV $distance $weight $port $val.\n";
|
|---|
| 604 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 605 | } # SRV
|
|---|
| 606 |
|
|---|
| 607 | elsif ($typemap{$type} eq 'RP') {
|
|---|
| 608 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
|
|---|
| 609 | # print {$zonefiles->{$loc}} "$host $ttl IN RP $val\n" or die $!;
|
|---|
| 610 | my $recdata = "$host. $ttl IN RP $val\n";
|
|---|
| 611 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 612 | } # RP
|
|---|
| 613 |
|
|---|
| 614 | elsif ($typemap{$type} eq 'PTR') {
|
|---|
| 615 | # $$recflags{$val}++;
|
|---|
| 616 | # maybe track exclusions like this? so we can publish "all
|
|---|
| 617 | # A and/or PTR records" irrespective of template records
|
|---|
| 618 | $$recflags{$val} = 'ptr';
|
|---|
| 619 | return if $host eq '%blank%';
|
|---|
| 620 |
|
|---|
| 621 | if ($revrec eq 'y') {
|
|---|
| 622 |
|
|---|
| 623 | if ($val =~ /\.arpa$/) {
|
|---|
| 624 | # someone put in the formal .arpa name. humor them.
|
|---|
| 625 | my $recdata = "$val. $ttl IN PTR $host.\n";
|
|---|
| 626 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 627 | } else {
|
|---|
| 628 | $zone = NetAddr::IP->new($zone);
|
|---|
| 629 | if (!$zone->{isv6} && $zone->masklen > 24) {
|
|---|
| 630 | # sub-octet v4 zone
|
|---|
| 631 | ($val) = ($val =~ /\.(\d+)$/);
|
|---|
| 632 | my $recdata = "$val.".DNSDB::_ZONE($zone, 'ZONE', 'r', '.').".in-addr.arpa. $ttl IN PTR $host.\n";
|
|---|
| 633 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 634 | } else {
|
|---|
| 635 | # not going to care about strange results if $val is not an IP value and is resolveable in DNS
|
|---|
| 636 | $val = NetAddr::IP->new($val);
|
|---|
| 637 | my $recdata = DNSDB::_ZONE($val, 'ZONE', 'r', '.').($val->{isv6} ? '.ip6.arpa' : '.in-addr.arpa').
|
|---|
| 638 | ". $ttl IN PTR $host.\n";
|
|---|
| 639 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 640 | }
|
|---|
| 641 | } # non-".arpa" $val
|
|---|
| 642 |
|
|---|
| 643 | } else {
|
|---|
| 644 | # PTRs in forward zones are less bizarre and insane than some other record types
|
|---|
| 645 | # in reverse zones... OTOH we can't validate them any which way, so we cross our
|
|---|
| 646 | # fingers and close our eyes and make it Someone Else's Problem.
|
|---|
| 647 | # print {$zonefiles->{$loc}} "$host $ttl IN PTR $val\n" or die $!;
|
|---|
| 648 | my $recdata = "$host. $ttl IN PTR $val.\n";
|
|---|
| 649 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 650 | }
|
|---|
| 651 | } # PTR
|
|---|
| 652 |
|
|---|
| 653 | elsif ($type == 65280) { # A+PTR
|
|---|
| 654 | # Recurse to PTR or A as appropriate because BIND et al don't share
|
|---|
| 655 | # the tinydns concept of merged forward/reverse records
|
|---|
| 656 | # %recflags gets updated in the PTR branch just above
|
|---|
| 657 | # $$recflags{$val}++;
|
|---|
| 658 | if ($revrec eq 'y') {
|
|---|
| 659 | printrec_bind($dnsdb, $zonefiles, $loclist, $recid, $revrec, $recflags, $zone, $host, 12, $val,
|
|---|
| 660 | $distance, $weight, $port, $ttl, $loc, $stamp, $expires, $stampactive);
|
|---|
| 661 | # ... but we need to tweak it for this case? so the A record gets published...
|
|---|
| 662 | #$$recflags{$val} = 'a+ptr';
|
|---|
| 663 | #print {$zonefiles->{$loc}} "=$host:$val:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 664 | # printrec_bind($dnsdb, \%zonefiles, $recid, 'y', \@loclist, $revzone,
|
|---|
| 665 | # $host, $type, $val, $dist, $weight, $port, $ttl, $loc, $stamp, $expires, $stampactive);
|
|---|
| 666 | # my ($zonefiles, $recid, $revrec, $loclist, $zone, $host, $type, $val, $distance, $weight, $port, $ttl,
|
|---|
| 667 | # $loc, $stamp, $expires, $stampactive) = @_;
|
|---|
| 668 | } else {
|
|---|
| 669 | printrec_bind($dnsdb, $zonefiles, $loclist, $recid, $revrec, $recflags, $zone, $host, 1, $val,
|
|---|
| 670 | $distance, $weight, $port, $ttl, $loc, $stamp, $expires, $stampactive);
|
|---|
| 671 | # set a unique flag to skip template expansion for this IP in forward zones
|
|---|
| 672 | $$recflags{$val} = 'a';
|
|---|
| 673 | }
|
|---|
| 674 | } # A+PTR
|
|---|
| 675 |
|
|---|
| 676 | elsif ($type == 65282) { # PTR template
|
|---|
| 677 | # only useful for v4 with standard DNS software, since this expands all
|
|---|
| 678 | # IPs in $zone (or possibly $val?) with autogenerated records
|
|---|
| 679 | $val = NetAddr::IP->new($val);
|
|---|
| 680 | return if $val->{isv6};
|
|---|
| 681 |
|
|---|
| 682 | if ($val->masklen <= 16) {
|
|---|
| 683 | foreach my $sub ($val->split(16)) {
|
|---|
| 684 | __publish_template_bind($dnsdb, $sub, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 685 | }
|
|---|
| 686 | } else {
|
|---|
| 687 | __publish_template_bind($dnsdb, $val, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 688 | }
|
|---|
| 689 | } # PTR template
|
|---|
| 690 |
|
|---|
| 691 | elsif ($type == 65283) { # A+PTR template
|
|---|
| 692 | $val = NetAddr::IP->new($val);
|
|---|
| 693 | # Just In Case. An A+PTR should be impossible to add to a v6 revzone via API.
|
|---|
| 694 | return if $val->{isv6};
|
|---|
| 695 |
|
|---|
| 696 | if ($val->masklen < 16) {
|
|---|
| 697 | foreach my $sub ($val->split(16)) {
|
|---|
| 698 | __publish_template_bind($dnsdb, $sub, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 699 | }
|
|---|
| 700 | } else {
|
|---|
| 701 | __publish_template_bind($dnsdb, $val, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 702 | }
|
|---|
| 703 | } # A+PTR template
|
|---|
| 704 |
|
|---|
| 705 | elsif ($type == 65284) { # AAAA+PTR template
|
|---|
| 706 | # Stub for completeness. Could be exported to DNS software that supports
|
|---|
| 707 | # some degree of internal automagic in generic-record-creation
|
|---|
| 708 | # (eg http://search.cpan.org/dist/AllKnowingDNS/ )
|
|---|
| 709 | } # AAAA+PTR template
|
|---|
| 710 |
|
|---|
| 711 | elsif ($type == 65300) { # ALIAS
|
|---|
| 712 | # Implemented as a unique record in parallel with many other
|
|---|
| 713 | # management tools, for clarity VS formal behviour around CNAME
|
|---|
| 714 | # Mainly for "root CNAME" or "apex alias"; limited value for any
|
|---|
| 715 | # other use case since CNAME can generally be used elsewhere.
|
|---|
| 716 |
|
|---|
| 717 | # .arpa zones don't need this hack. shouldn't be allowed into
|
|---|
| 718 | # the DB in the first place, but Just In Case...
|
|---|
| 719 | return if $revrec eq 'y';
|
|---|
| 720 |
|
|---|
| 721 | my ($iplist) = $dnsdb->{dbh}->selectrow_array("SELECT auxdata FROM records WHERE record_id = ?", undef, $recid);
|
|---|
| 722 | $iplist = '' if !$iplist;
|
|---|
| 723 |
|
|---|
| 724 | # shared target-name-to-IP converter
|
|---|
| 725 | my $liveips = $dnsdb->_grab_65300($recid, $val);
|
|---|
| 726 | # only update the cache if the live lookup actually returned data
|
|---|
| 727 | if ($liveips && ($iplist ne $liveips)) {
|
|---|
| 728 | $dnsdb->{dbh}->do("UPDATE records SET auxdata = ? WHERE record_id = ?", undef, $liveips, $recid);
|
|---|
| 729 | $iplist = $liveips;
|
|---|
| 730 | }
|
|---|
| 731 |
|
|---|
| 732 | # slice the TTL we'll actually publish off the front
|
|---|
| 733 | my @asubs = split ';', $iplist;
|
|---|
| 734 | my $attl = shift @asubs;
|
|---|
| 735 |
|
|---|
| 736 | # output a plain old A or AAAA record for each IP the target name really points to.
|
|---|
| 737 | # in the event that, for whatever reason, no A/AAAA records are available for $val, nothing will be output.
|
|---|
| 738 | foreach my $subip (@asubs) {
|
|---|
| 739 | my $recdata;
|
|---|
| 740 | if ($subip =~ /\d+\.\d+\.\d+\.\d+/) {
|
|---|
| 741 | $recdata = "$host. $attl IN A $subip\n";
|
|---|
| 742 | } else {
|
|---|
| 743 | $recdata = "$host. $attl IN AAAA $subip\n";
|
|---|
| 744 | }
|
|---|
| 745 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 746 | }
|
|---|
| 747 |
|
|---|
| 748 | } # ALIAS
|
|---|
| 749 |
|
|---|
| 750 |
|
|---|
| 751 | } # printrec_bind()
|
|---|
| 752 |
|
|---|
| 753 |
|
|---|
| 754 | sub __publish_template_bind {
|
|---|
| 755 | my $dnsdb = shift;
|
|---|
| 756 | my $sub = shift;
|
|---|
| 757 | my $recflags = shift;
|
|---|
| 758 | my $hpat = shift;
|
|---|
| 759 | my $zonefiles = shift;
|
|---|
| 760 | my $loclist = shift;
|
|---|
| 761 | my $ttl = shift;
|
|---|
| 762 | my $stamp = shift;
|
|---|
| 763 | my $loc = shift;
|
|---|
| 764 | my $zpass = shift;
|
|---|
| 765 | my $zone = new NetAddr::IP $zpass;
|
|---|
| 766 | # my $zone = new NetAddr::IP shift;
|
|---|
| 767 | my $revrec = shift || 'y';
|
|---|
| 768 | # my $ptrflag = shift || 0; ##fixme: default to PTR instead of A record for the BIND variant of this sub?
|
|---|
| 769 |
|
|---|
| 770 | # do this conversion once, not (number-of-ips-in-subnet) times
|
|---|
| 771 | my $arpabase = DNSDB::_ZONE($zone, 'ZONE.in-addr.arpa.', 'r', '.');
|
|---|
| 772 |
|
|---|
| 773 | my $iplist = $sub->splitref(32);
|
|---|
| 774 | my $ipindex = -1;
|
|---|
| 775 | foreach (@$iplist) {
|
|---|
| 776 | my $ip = $_->addr;
|
|---|
| 777 | $ipindex++;
|
|---|
| 778 | # make as if we split the non-octet-aligned block into octet-aligned blocks as with SOA
|
|---|
| 779 | my $lastoct = (split /\./, $ip)[3];
|
|---|
| 780 |
|
|---|
| 781 | # Allow smaller entries to override longer ones, eg, a specific PTR will
|
|---|
| 782 | # always publish, overriding any template record containing that IP.
|
|---|
| 783 | # %blank% also needs to be per-IP here to properly cascade overrides with
|
|---|
| 784 | # multiple nested templates
|
|---|
| 785 | # next if $$recflags{$ip}; # && $self->{skip_bcast_255}
|
|---|
| 786 |
|
|---|
| 787 | # next if $$recflags{$ip} && ($$recflags{$ip} eq 'ptr' || $$recflags{$ip} eq 'a+ptr');
|
|---|
| 788 |
|
|---|
| 789 | if ($revrec eq 'y') {
|
|---|
| 790 | next if $$recflags{$ip}; # blanket exclusion; we do reverse records first
|
|---|
| 791 | } else {
|
|---|
| 792 | ##fixme: A record side templates not cascading correctly
|
|---|
| 793 | # excluding ptr does NOT work, as it excludes ALL previously covered A+PTR template entries.
|
|---|
| 794 | # we only want to exclude the singleton (A+)PTR ones
|
|---|
| 795 | #if ($$recflags{$ip} && ($$recflags{$ip} eq 'a' || $$recflags{$ip} eq 'ptr')) {
|
|---|
| 796 | if ($$recflags{$ip} && ($$recflags{$ip} eq 'a' || $$recflags{$ip} eq 'atemplate' || $$recflags{$ip} eq 'ptr')) {
|
|---|
| 797 | # default skip case
|
|---|
| 798 | next;
|
|---|
| 799 | }
|
|---|
| 800 | } # revrec branch for skipping template member expansion
|
|---|
| 801 |
|
|---|
| 802 | # set a forward/reverse-unique flag in %recflags
|
|---|
| 803 | $$recflags{$ip} = ($revrec eq 'y' ? 'ptrtemplate' : 'atemplate');
|
|---|
| 804 | next if $hpat eq '%blank%';
|
|---|
| 805 |
|
|---|
| 806 | my $rec = $hpat; # start fresh with the template for each IP
|
|---|
| 807 | ##fixme: there really isn't a good way to handle sub-/24 zones here. This way at least
|
|---|
| 808 | # seems less bad than some alternatives.
|
|---|
| 809 | $dnsdb->_template4_expand(\$rec, $ip, \$sub, $ipindex);
|
|---|
| 810 | # _template4_expand may blank $rec; if so, don't publish a record
|
|---|
| 811 | next if !$rec;
|
|---|
| 812 | ##fixme: trim merged record type voodoo. "if ($ptrflag) {} else {}" ?
|
|---|
| 813 | # if ($ptrflag || $zone->masklen > 24) {
|
|---|
| 814 | my $recdata;
|
|---|
| 815 | if ($revrec eq 'y') {
|
|---|
| 816 | # || $zone->masklen > 24) {
|
|---|
| 817 | # print $fh "^$lastoct.$arpabase:$rec:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 818 | ##fixme: use $ORIGIN instead? make the FQDN output switchable-optional?
|
|---|
| 819 | # print $fh "$lastoct.$arpabase $ttl IN PTR $rec\n" or die $!;
|
|---|
| 820 | # if ($revrec ne 'y') {
|
|---|
| 821 | # print a separate A record. Arguably we could use an = record here instead.
|
|---|
| 822 | # print $fh "+$rec:$ip:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 823 | # print $fh "$rec $ttl IN A $ip\n" or die $!;
|
|---|
| 824 | # }
|
|---|
| 825 | if ($dnsdb->{bind_export_fqdn}) {
|
|---|
| 826 | $recdata = "$lastoct.$arpabase $ttl IN PTR $rec.\n";
|
|---|
| 827 | } else {
|
|---|
| 828 | $recdata = "$lastoct $ttl IN PTR $rec.\n";
|
|---|
| 829 | }
|
|---|
| 830 |
|
|---|
| 831 | } else {
|
|---|
| 832 | # A record, not merged
|
|---|
| 833 | # print $fh "=$rec:$ip:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 834 | # print $fh "$rec $ttl IN A $ip\n" or die $!;
|
|---|
| 835 | $rec =~ s/\.$zone$// unless $dnsdb->{bind_export_fqdn};
|
|---|
| 836 | $recdata = "$rec. $ttl IN A $ip\n";
|
|---|
| 837 | }
|
|---|
| 838 | # and finally
|
|---|
| 839 | __recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 840 | } # foreach (@iplist)
|
|---|
| 841 | } # __publish_template_bind()
|
|---|
| 842 |
|
|---|
| 843 |
|
|---|
| 844 | # actual record printing sub
|
|---|
| 845 | # loop on the locations here so we don't end up with a huge pot of copypasta
|
|---|
| 846 | sub __recprint {
|
|---|
| 847 | my ($zonefiles, $loclist, $loc, $recdata) = @_;
|
|---|
| 848 | if ($loc eq '') {
|
|---|
| 849 | # "common" record visible in all locations
|
|---|
| 850 | foreach my $rloc (@{$loclist}) {
|
|---|
| 851 | print {$zonefiles->{$rloc}} $recdata or die $!;
|
|---|
| 852 | }
|
|---|
| 853 | } else {
|
|---|
| 854 | # record with specific location tagged
|
|---|
| 855 | print {$zonefiles->{$loc}} $recdata or die $!;
|
|---|
| 856 | }
|
|---|
| 857 | }
|
|---|
| 858 |
|
|---|
| 859 | 1;
|
|---|
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