| 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 871 2022-09-28 21:51:26Z kdeugau $
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| 6 | # Copyright 2022 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 | sub export {
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| 28 | # expected to be a DNSDB object
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| 29 | my $dnsdb = shift;
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| 30 |
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| 31 | # to be a hash of views/locations, containing lists of zones
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| 32 | my %viewzones;
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| 33 |
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| 34 | # allow for future exports of subgroups of records
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| 35 | my $viewlist = $dnsdb->getLocList(curgroup => 1);
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| 36 |
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| 37 |
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| 38 | ## export reverse zones
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| 39 |
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| 40 | my $soasth = $dnsdb->{dbh}->prepare("SELECT host,type,val,distance,weight,port,ttl,record_id,location ".
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| 41 | "FROM records WHERE rdns_id=? AND type=6");
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| 42 | my $recsth = $dnsdb->{dbh}->prepare("SELECT host,type,val,distance,weight,port,ttl,record_id,location,extract(epoch from stamp),expires,stampactive ".
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| 43 | "FROM records WHERE rdns_id=? AND NOT type=6 ".
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| 44 | "ORDER BY masklen(inetlazy(val)) DESC, inetlazy(val)");
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| 45 |
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| 46 | # Fetch active zone list
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| 47 | my $revsth = $dnsdb->{dbh}->prepare("SELECT rdns_id,revnet,status,changed,default_location FROM revzones WHERE status=1 ".
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| 48 | "ORDER BY masklen(revnet),revnet DESC, rdns_id");
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| 49 | # Unflag changed zones, so we can maybe cache the export and not redo everything every time
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| 50 | my $zonesth = $dnsdb->{dbh}->prepare("UPDATE revzones SET changed='n' WHERE rdns_id=?");
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| 51 | $revsth->execute();
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| 52 |
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| 53 | my %recflags; # need this to be independent for forward vs reverse zones, as they're not merged
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| 54 |
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| 55 | while (my ($revid,$revzone,$revstat,$changed,$defloc) = $revsth->fetchrow_array) {
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| 56 | my $cidr = NetAddr::IP->new($revzone);
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| 57 | my $zfile = $cidr->network->addr."-".$cidr->masklen;
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| 58 | # my $cachefile = "$dnsdb->{exportcache}/$zfile";
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| 59 | # my $tmpcache = "$dnsdb->{exportcache}/tmp.$zfile.$$";
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| 60 | my $tmpcache = "tmp.$zfile.$$"; # safety net. don't overwrite a previous known-good file
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| 61 |
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| 62 | ##fixme: convert logical revzone into .arpa name? maybe take a slice of showrev_arpa?
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| 63 | ##fixme: need to bodge logical non-octet-boundary revzones into octet-boundary revzones
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| 64 | ##fixme: do we do cache files? views balloon the file count stupidly
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| 65 | ## foreach $octetzone $cidr->split(octet-boundary)
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| 66 | ## loclist = SELECT DISTINCT location FROM records WHERE rdns_id = $zid AND inetlazy(val) <<= $octetzone
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| 67 |
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| 68 | #printf "non-octet? %s, %i\n", $cidr->masklen, $cidr->masklen % 8;
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| 69 |
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| 70 | # fetch a list of views/locations present in the zone. we need to publish a file for each one.
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| 71 | # in the event that no locations are present (~~ $viewlist is empty), /%view collapses to nothing in the zone path
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| 72 | # my (@loclist) = $dnsdb->{dbh}->selectrow_array("SELECT DISTINCT location FROM records WHERE rdns_id = ?", undef, $revid);
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| 73 | my $tmplocs = $dnsdb->{dbh}->selectall_arrayref("SELECT DISTINCT location FROM records WHERE rdns_id = ?", undef, $revid);
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| 74 | my @loclist;
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| 75 | foreach my $tloc (@{$tmplocs}) {
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| 76 | push @loclist, ($tloc->[0] eq '' ? 'common' : $tloc->[0]);
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| 77 | }
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| 78 |
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| 79 | my %zonefiles; # zone file handles
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| 80 |
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| 81 | eval {
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| 82 |
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| 83 | my $arpazone = DNSDB::_ZONE($cidr, 'ZONE', 'r', '.').($cidr->{isv6} ? '.ip6.arpa' : '.in-addr.arpa');
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| 84 |
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| 85 | ##fixme: need to open separate zone files for aggregated metazones eg /22 or /14
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| 86 | foreach my $loc (@loclist) {
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| 87 | my $zfilepath = $dnsdb->bind_export_reverse_zone_path};
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| 88 | $zfilepath =~ s/\%view/$loc/;
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| 89 | $zfilepath =~ s/\%zone/$revzone/;
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| 90 | $zfilepath =~ s/\%arpazone/$arpazone/;
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| 91 |
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| 92 | # Just In Case(TM)
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| 93 | $zfilepath =~ s,[^\w./-],_,g;
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| 94 |
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| 95 | # open $zonefiles{$loc}, ">", $zfilepath;
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| 96 |
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| 97 | # write fresh records if:
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| 98 | # - we are not using the cache
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| 99 | # - force_refresh is set
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| 100 | # - the zone has changed
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| 101 | # - the cache file does not exist
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| 102 | # - the cache file is empty
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| 103 | if ($dnsdb->{force_refresh} || $changed || !-e $zfilepath || -z $zfilepath) {
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| 104 | # if (!$dnsdb->{usecache} || $dnsdb->{force_refresh} || $changed || !-e $cachefile || -z $cachefile) {
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| 105 | # if ($dnsdb->{usecache}) {
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| 106 | # open ZONECACHE, ">$tmpcache" or die "Error creating temporary file $tmpcache: $!\n";
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| 107 | # $zonefilehandle = *ZONECACHE;
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| 108 | # }
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| 109 | open $zonefiles{$loc}, ">", $zfilepath or die "Error creating temporary file $zfilepath: $!\n";
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| 110 |
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| 111 | printf {$zonefiles{$loc}} "; %s in view %s exported %s\n", $arpazone, $loc, scalar(localtime)
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| 112 | or die "Error writing header [$zone, '$loc']: $!\n";;
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| 113 |
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| 114 | # need to fetch this separately since the rest of the records all (should) have real IPs in val
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| 115 | $soasth->execute($revid);
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| 116 | my (@zsoa) = $soasth->fetchrow_array();
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| 117 | ##fixme: do we even need @loclist passed in?
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| 118 | publishrec_bind(\%zonefiles, \@loclist, $zsoa[7], 'y', \%recflags, $revzone,
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| 119 | $zsoa[0], $zsoa[1], $zsoa[2], $zsoa[3], $zsoa[4], $zsoa[5], $zsoa[6], $loc, '');
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| 120 | } # if force_refresh etc
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| 121 |
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| 122 | # tag the zonefile for publication in the view
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| 123 | push @{$viewzones{$loc}}, $arpazone;
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| 124 | } # foreach @loclist
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| 125 |
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| 126 | # now the meat of the records
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| 127 | $recsth->execute($revid);
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| 128 | my $fullzone = _ZONE($tmpzone, 'ZONE', 'r', '.').($tmpzone->{isv6} ? '.ip6.arpa' : '.in-addr.arpa');
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| 129 |
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| 130 | while (my ($host, $type, $val, $dist, $weight, $port, $ttl, $recid, $loc, $stamp, $expires, $stampactive)
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| 131 | = $recsth->fetchrow_array) {
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| 132 | next if $recflags{$recid};
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| 133 |
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| 134 | # Check for out-of-zone data
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| 135 | if ($val =~ /\.arpa$/) {
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| 136 | # val is non-IP
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| 137 | if ($val !~ /$fullzone$/) {
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| 138 | warn "Not exporting out-of-zone record $val $typemap{$type} $host, $ttl (zone $tmpzone)\n";
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| 139 | next;
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| 140 | }
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| 141 | } else {
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| 142 | my $ipval = new NetAddr::IP $val;
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| 143 | if (!$tmpzone->contains($ipval)) {
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| 144 | warn "Not exporting out-of-zone record $val $typemap{$type} $host, $ttl (zone $tmpzone)\n";
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| 145 | next;
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| 146 | }
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| 147 | } # is $val a raw .arpa name?
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| 148 |
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| 149 | # Spaces are evil.
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| 150 | $val =~ s/^\s+//;
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| 151 | $val =~ s/\s+$//;
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| 152 | if ($typemap{$type} ne 'TXT') {
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| 153 | # Leading or trailng spaces could be legit in TXT records.
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| 154 | $host =~ s/^\s+//;
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| 155 | $host =~ s/\s+$//;
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| 156 | }
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| 157 |
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| 158 | publishrec_bind(\%zonefiles, \@loclist, $recid, 'y', \%recflags, $revzone,
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| 159 | $host, $type, $val, $dist, $weight, $port, $ttl, $loc, $stamp, $expires, $stampactive);
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| 160 |
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| 161 | $recflags{$recid} = 1;
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| 162 |
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| 163 | } # while ($recsth)
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| 164 |
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| 165 | # if ($dnsdb->{usecache}) {
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| 166 | # close ZONECACHE; # force the file to be written
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| 167 | # # catch obvious write errors that leave an empty temp file
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| 168 | # if (-s $tmpcache) {
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| 169 | # rename $tmpcache, $cachefile
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| 170 | # or die "Error overwriting cache file $cachefile with temporary file: $!\n";
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| 171 | # }
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| 172 | # }
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| 173 |
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| 174 | };
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| 175 | if ($@) {
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| 176 | die "error writing ".($dnsdb->{usecache} ? 'new data for ' : '')."$revzone: $@\n";
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| 177 | # error! something borked, and we should be able to fall back on the old cache file
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| 178 | # report the error, somehow.
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| 179 | } else {
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| 180 | # mark zone as unmodified. Only do this if no errors, that way
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| 181 | # export failures should recover a little more automatically.
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| 182 | $zonesth->execute($revid);
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| 183 | }
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| 184 |
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| 185 | # if ($dnsdb->{usecache}) {
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| 186 | # # We've already made as sure as we can that a cached zone file is "good",
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| 187 | # # although possibly stale/obsolete due to errors creating a new one.
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| 188 | # eval {
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| 189 | # open CACHE, "<$cachefile" or die $!;
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| 190 | # print $datafile $_ or die "error copying cached $revzone to master file: $!" while <CACHE>;
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| 191 | # close CACHE;
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| 192 | # };
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| 193 | # die $@ if $@;
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| 194 | # }
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| 195 |
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| 196 | } # revsth->fetch
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| 197 |
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| 198 |
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| 199 |
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| 200 | # Write the view configuration last, because otherwise we have to be horribly inefficient
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| 201 | # at figuring out which zones are visible/present in which views
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| 202 | if ($viewlist) {
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| 203 | my $tmpconf = "$dnsdb->{bind_zone_conf}.$$"; ##fixme: split filename for prefixing
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| 204 | open BINDCONF, ">", $tmpconf;
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| 205 |
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| 206 | foreach my $view (@{$viewlist}, 'common') {
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| 207 | #print Dumper($view);
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| 208 | print BINDCONF "view $view->{location} {\n";
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| 209 | # print "view $view->{location} {\n";
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| 210 | # could also use an acl { ... }; statement, then match-clients { aclname; };, but that gets hairy
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| 211 | # note that some semantics of data visibility need to be handled by the record export, since it's
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| 212 | # not 100% clear if the semantics of a tinydns view with an empty IP list (matches anyone) are the
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| 213 | # same as a BIND view with match-clients { any; };
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| 214 | if ($view->{iplist}) {
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| 215 | print BINDCONF " match-clients { ".join("; ", $view->{iplist})."; };\n";
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| 216 | # print " match-clients { ".join("; ", split(/[\s,]+/, $view->{iplist}))."; };\n";
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| 217 | } else {
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| 218 | print BINDCONF " match-clients { any; };\n";
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| 219 | # print " match-clients { any; };\n";
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| 220 | }
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| 221 | foreach my $zone (@{$viewzones{$view->{location}}}) {
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| 222 | ##fixme: notify settings, maybe per-zone?
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| 223 | print qq( zone "$zone" IN {\n\ttype master;\n\tnotify no;\n\tfile "db.$zone";\n };\n);
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| 224 | }
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| 225 | print BINDCONF "};\n\n";
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| 226 | print "};\n\n";
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| 227 | } # foreach @$viewlist
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| 228 | rename $tmpconf, $dnsdb->{bind_zone_conf};
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| 229 | } # if $viewlist
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| 230 |
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| 231 | } # export()
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| 232 |
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| 233 |
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| 234 | # Print individual records in BIND format
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| 235 | sub publishrec_bind {
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| 236 | my $dnsdb = shift;
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| 237 |
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| 238 | # my ($zonefiles, $recid, $revrec, $loclist, $zone, $host, $type, $val, $distance, $weight, $port, $ttl,
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| 239 | my ($zonefiles, $loclist, $recid, $revrec, $recflags, $zone, $host, $type, $val, $distance, $weight, $port, $ttl,
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| 240 | $loc, $stamp, $expires, $stampactive) = @_;
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| 241 |
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| 242 | # make sure "global" records get into all the right per-view zone files, without having to do this loop in each record-print location
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| 243 | ##fixme: maybe exclude the template types? those may be more expensive to export
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| 244 | ## *ponder* may be more efficient to loop in each record print due to substitution and manipulation from stored data to formal
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| 245 | ## record for .arpa zones for all records
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| 246 | if ($loc eq '') {
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| 247 | foreach my $subloc (@{$loclist}) {
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| 248 | publishrec_bind($zonefiles, $loclist, $recid, $revrec, $recflags, $zone, $host, $type, $val, $distance, $weight, $port, $ttl,
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| 249 | $subloc, $stamp, $expires, $stampactive);
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| 250 | }
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| 251 | }
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| 252 |
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| 253 | # Just In Case something is lingering in the DB
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| 254 | $loc = '' if !$loc;
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| 255 |
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| 256 | ## And now to the records!
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| 257 |
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| 258 | if ($typemap{$type} eq 'SOA') {
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| 259 | # host contains pri-ns:responsible
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| 260 | # val is abused to contain refresh:retry:expire:minttl
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| 261 | # let's be explicit about abusing $host and $val
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| 262 | my ($email, $primary) = (split /:/, $host)[0,1];
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| 263 | my ($refresh, $retry, $expire, $min_ttl) = (split /:/, $val)[0,1,2,3];
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| 264 | my $serial = 0; # fail less horribly than leaving it empty?
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| 265 | # just snarfing the right SOA serial for the zone type
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| 266 | if ($revrec eq 'y') {
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| 267 | ($serial) = $dnsdb->{dbh}->selectrow_array("SELECT zserial FROM revzones WHERE revnet=?", undef, $zone);
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| 268 | } else {
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| 269 | ($serial) = $dnsdb->{dbh}->selectrow_array("SELECT zserial FROM domains WHERE domain=?", undef, $zone);
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| 270 | } # revrec <> 'y'
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| 271 | # suppress a "uninitialized value" warning. should be impossible but...
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| 272 | # abuse hours as the last digit pair of the serial for simplicity
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| 273 | ##fixme?: alternate SOA serial schemes?
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| 274 | $serial = strftime("%Y%m%d%H", localtime()) if !$serial;
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| 275 | $primary .= "." if $primary !~ /\.$/;
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| 276 | $email .= "." if $email !~ /\.$/;
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| 277 | # print *{$zonefiles->{$loc}} "Z$zone:$primary:$email:$serial:$refresh:$retry:$expire:$min_ttl:$ttl:$stamp:$loc\n"
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| 278 | # or die $!;
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| 279 | # print *{$zonefiles->{$loc}} "$zone $ttl IN SOA $primary $email ( $serial $refresh $retry $expire $min_ttl )\n"
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| 280 | # or die "couldn't write $zone SOA: $!";
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| 281 | my $recdata = "$zone $ttl IN SOA $primary $email ( $serial $refresh $retry $expire $min_ttl )\n";
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| 282 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 283 | } # SOA
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| 284 |
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| 285 | elsif ($typemap{$type} eq 'A') {
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| 286 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
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| 287 | # print $datafile "+$host:$val:$ttl:$stamp:$loc\n" or die $!;
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| 288 | # print {$zonefiles->{$loc}} "$host $ttl IN A $val\n" or die $!;
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| 289 | my $recdata = "$host $ttl IN A $val\n";
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| 290 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 291 | } # A
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| 292 |
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| 293 | elsif ($typemap{$type} eq 'NS') {
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| 294 | if ($revrec eq 'y') {
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| 295 | $val = NetAddr::IP->new($val);
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| 296 |
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| 297 | ##fixme: conversion for sub-/24 delegations in reverse zones?
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| 298 | # if (!$val->{isv6} && ($val->masklen > 24)) {
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| 299 | # }
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| 300 |
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| 301 | # print {$zonefiles->{$loc}} "$zone $ttl IN NS $host\n";
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| 302 | # print "$zone $ttl IN NS $host\n" or die $!;
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| 303 | my $recdata = "$zone $ttl IN NS $host\n";
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| 304 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 305 |
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| 306 | } else {
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| 307 | # print $datafile "\&$host"."::$val:$ttl:$stamp:$loc\n" or die $!;
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| 308 | }
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| 309 | } # NS
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| 310 |
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| 311 | elsif ($typemap{$type} eq 'AAAA') {
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| 312 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
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| 313 | # print {$zonefiles->{$loc}} "$host $ttl IN AAAA $val\n" or die $!;
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| 314 | my $recdata = "$host $ttl IN AAAA $val\n";
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| 315 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 316 | } # AAAA
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| 317 |
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| 318 | elsif ($typemap{$type} eq 'TXT') {
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| 319 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
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| 320 | # print {$zonefiles->{$loc}} "$host $ttl IN TXT \"$val\"\n" or die $!;
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| 321 | my $recdata = "$host $ttl IN TXT \"$val\"\n";
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| 322 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 323 | } # TXT
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| 324 |
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| 325 | elsif ($typemap{$type} eq 'CNAME') {
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| 326 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
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| 327 | # print {$zonefiles->{$loc}} "$host $ttl IN CNAME $val\n" or die $!;
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| 328 | my $recdata = "$host $ttl IN CNAME $val\n";
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| 329 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 330 | } # CNAME
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| 331 |
|
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| 332 | elsif ($typemap{$type} eq 'SRV') {
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| 333 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
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| 334 | # print {$zonefiles->{$loc}} "$host $ttl IN SRV $distance $weight $port $val\n" or die $!;
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| 335 | my $recdata = "$host $ttl IN SRV $distance $weight $port $val\n";
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| 336 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 337 | } # SRV
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| 338 |
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| 339 | elsif ($typemap{$type} eq 'RP') {
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| 340 | # ($host,$val) = __revswap($host,$val) if $revrec eq 'y';
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| 341 | # print {$zonefiles->{$loc}} "$host $ttl IN RP $val\n" or die $!;
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| 342 | my $recdata = "$host $ttl IN RP $val\n";
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| 343 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 344 | } # RP
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| 345 |
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| 346 |
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| 347 | elsif ($typemap{$type} eq 'PTR') {
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| 348 | $$recflags{$val}++;
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| 349 | if ($revrec eq 'y') {
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| 350 |
|
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| 351 | if ($val =~ /\.arpa$/) {
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| 352 | # someone put in the formal .arpa name. humor them.
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| 353 | # print {$zonefiles->{$loc}} "$val $ttl IN PTR $host\n" or die $!;
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| 354 | my $recdata = "$val $ttl IN PTR $host\n";
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| 355 | recprint($zonefiles, $loclist, $loc, $recdata);
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| 356 | } else {
|
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| 357 | $zone = NetAddr::IP->new($zone);
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| 358 | if (!$zone->{isv6} && $zone->masklen > 24) {
|
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| 359 | # sub-octet v4 zone
|
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| 360 | ($val) = ($val =~ /\.(\d+)$/);
|
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| 361 | # print {$zonefiles->{$loc}} "$val.".DNSDB::_ZONE($zone, 'ZONE', 'r', '.').'.in-addr.arpa'.
|
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| 362 | # " $ttl IN PTR $host\n"
|
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| 363 | # or die $!;
|
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| 364 | my $recdata = "$val.".DNSDB::_ZONE($zone, 'ZONE', 'r', '.').".in-addr.arpa $ttl IN PTR $host\n";
|
|---|
| 365 | recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 366 | } else {
|
|---|
| 367 | # not going to care about strange results if $val is not an IP value and is resolveable in DNS
|
|---|
| 368 | $val = NetAddr::IP->new($val);
|
|---|
| 369 | # print {$zonefiles->{$loc}} DNSDB::_ZONE($val, 'ZONE', 'r', '.').($val->{isv6} ? '.ip6.arpa' : '.in-addr.arpa').
|
|---|
| 370 | # " $ttl IN PTR $host\n"
|
|---|
| 371 | # or die $!;
|
|---|
| 372 | my $recdata = DNSDB::_ZONE($val, 'ZONE', 'r', '.').($val->{isv6} ? '.ip6.arpa' : '.in-addr.arpa').
|
|---|
| 373 | " $ttl IN PTR $host\n";
|
|---|
| 374 | recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 375 | }
|
|---|
| 376 | } # non-".arpa" $val
|
|---|
| 377 |
|
|---|
| 378 | } else {
|
|---|
| 379 | # PTRs in forward zones are less bizarre and insane than some other record types
|
|---|
| 380 | # in reverse zones... OTOH we can't validate them any which way, so we cross our
|
|---|
| 381 | # fingers and close our eyes and make it Someone Else's Problem.
|
|---|
| 382 | # print {$zonefiles->{$loc}} "$host $ttl IN PTR $val\n" or die $!;
|
|---|
| 383 | my $recdata = "$host $ttl IN PTR $val\n";
|
|---|
| 384 | recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 385 | }
|
|---|
| 386 | } # PTR
|
|---|
| 387 |
|
|---|
| 388 | elsif ($type == 65280) { # A+PTR
|
|---|
| 389 | # Recurse to PTR or A as appropriate because BIND et al don't share
|
|---|
| 390 | # the tinydns concept of merged forward/reverse records
|
|---|
| 391 | $$recflags{$val}++;
|
|---|
| 392 | if ($revrec eq 'y') {
|
|---|
| 393 | publishrec_bind($zonefiles, $loclist, $recid, $revrec, $recflags, $zone, $host, 12, $val, $distance, $weight, $port, $ttl,
|
|---|
| 394 | $loc, $stamp, $expires, $stampactive);
|
|---|
| 395 | #print {$zonefiles->{$loc}} "=$host:$val:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 396 | # publishrec_bind(\%zonefiles, $recid, 'y', \@loclist, $revzone,
|
|---|
| 397 | # $host, $type, $val, $dist, $weight, $port, $ttl, $loc, $stamp, $expires, $stampactive);
|
|---|
| 398 | # my ($zonefiles, $recid, $revrec, $loclist, $zone, $host, $type, $val, $distance, $weight, $port, $ttl,
|
|---|
| 399 | # $loc, $stamp, $expires, $stampactive) = @_;
|
|---|
| 400 | } else {
|
|---|
| 401 | publishrec_bind($zonefiles, $loclist, $recid, $revrec, $recflags, $zone, $host, 1, $val, $distance, $weight, $port, $ttl,
|
|---|
| 402 | $loc, $stamp, $expires, $stampactive);
|
|---|
| 403 | }
|
|---|
| 404 | } # A+PTR
|
|---|
| 405 |
|
|---|
| 406 | elsif ($type == 65282) { # PTR template
|
|---|
| 407 | # only useful for v4 with standard DNS software, since this expands all
|
|---|
| 408 | # IPs in $zone (or possibly $val?) with autogenerated records
|
|---|
| 409 | $val = NetAddr::IP->new($val);
|
|---|
| 410 | return if $val->{isv6};
|
|---|
| 411 |
|
|---|
| 412 | if ($val->masklen <= 16) {
|
|---|
| 413 | foreach my $sub ($val->split(16)) {
|
|---|
| 414 | __publish_template_bind($sub, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 415 | }
|
|---|
| 416 | } else {
|
|---|
| 417 | __publish_template_bind($sub, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 418 | }
|
|---|
| 419 | } # PTR template
|
|---|
| 420 |
|
|---|
| 421 | elsif ($type == 65283) { # A+PTR template
|
|---|
| 422 | $val = NetAddr::IP->new($val);
|
|---|
| 423 | # Just In Case. An A+PTR should be impossible to add to a v6 revzone via API.
|
|---|
| 424 | return if $val->{isv6};
|
|---|
| 425 |
|
|---|
| 426 | if ($val->masklen < 16) {
|
|---|
| 427 | foreach my $sub ($val->split(16)) {
|
|---|
| 428 | __publish_template_bind($sub, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 429 | }
|
|---|
| 430 | } else {
|
|---|
| 431 | __publish_template_bind($sub, $recflags, $host, $zonefiles, $loclist, $ttl, $stamp, $loc, $zone, $revrec);
|
|---|
| 432 | }
|
|---|
| 433 | } # A+PTR template
|
|---|
| 434 |
|
|---|
| 435 | elsif ($type == 65284) { # AAAA+PTR template
|
|---|
| 436 | # Stub for completeness. Could be exported to DNS software that supports
|
|---|
| 437 | # some degree of internal automagic in generic-record-creation
|
|---|
| 438 | # (eg http://search.cpan.org/dist/AllKnowingDNS/ )
|
|---|
| 439 | } # AAAA+PTR template
|
|---|
| 440 |
|
|---|
| 441 | } # publishrec_bind()
|
|---|
| 442 |
|
|---|
| 443 |
|
|---|
| 444 | sub __publish_template_bind {
|
|---|
| 445 | my $sub = shift;
|
|---|
| 446 | my $recflags = shift;
|
|---|
| 447 | my $hpat = shift;
|
|---|
| 448 | my $zonefiles = shift;
|
|---|
| 449 | my $loclist = shift;
|
|---|
| 450 | my $ttl = shift;
|
|---|
| 451 | my $stamp = shift;
|
|---|
| 452 | my $loc = shift;
|
|---|
| 453 | my $zone = new NetAddr::IP shift;
|
|---|
| 454 | my $revrec = shift || 'y';
|
|---|
| 455 | # my $ptrflag = shift || 0; ##fixme: default to PTR instead of A record for the BIND variant of this sub?
|
|---|
| 456 |
|
|---|
| 457 | # do this conversion once, not (number-of-ips-in-subnet) times
|
|---|
| 458 | my $arpabase = DNSDB::_ZONE($zone, 'ZONE.in-addr.arpa', 'r', '.');
|
|---|
| 459 |
|
|---|
| 460 | my $iplist = $sub->splitref(32);
|
|---|
| 461 | my $ipindex = -1;
|
|---|
| 462 | foreach (@$iplist) {
|
|---|
| 463 | my $ip = $_->addr;
|
|---|
| 464 | $ipindex++;
|
|---|
| 465 | # make as if we split the non-octet-aligned block into octet-aligned blocks as with SOA
|
|---|
| 466 | my $lastoct = (split /\./, $ip)[3];
|
|---|
| 467 |
|
|---|
| 468 | # Allow smaller entries to override longer ones, eg, a specific PTR will
|
|---|
| 469 | # always publish, overriding any template record containing that IP.
|
|---|
| 470 | # %blank% also needs to be per-IP here to properly cascade overrides with
|
|---|
| 471 | # multiple nested templates
|
|---|
| 472 | next if $$recflags{$ip}; # && $self->{skip_bcast_255}
|
|---|
| 473 | $$recflags{$ip}++;
|
|---|
| 474 | next if $hpat eq '%blank%';
|
|---|
| 475 |
|
|---|
| 476 | my $rec = $hpat; # start fresh with the template for each IP
|
|---|
| 477 | ##fixme: there really isn't a good way to handle sub-/24 zones here. This way at least
|
|---|
| 478 | # seems less bad than some alternatives.
|
|---|
| 479 | $dnsdb->_template4_expand(\$rec, $ip, \$sub, $ipindex);
|
|---|
| 480 | # _template4_expand may blank $rec; if so, don't publish a record
|
|---|
| 481 | next if !$rec;
|
|---|
| 482 | ##fixme: trim merged record type voodoo. "if ($ptrflag) {} else {}" ?
|
|---|
| 483 | # if ($ptrflag || $zone->masklen > 24) {
|
|---|
| 484 | my $recdata;
|
|---|
| 485 | if ($revrec eq 'y') {
|
|---|
| 486 | # || $zone->masklen > 24) {
|
|---|
| 487 | # print $fh "^$lastoct.$arpabase:$rec:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 488 | ##fixme: use $ORIGIN instead? make the FQDN output switchable-optional?
|
|---|
| 489 | # print $fh "$lastoct.$arpabase $ttl IN PTR $rec\n" or die $!;
|
|---|
| 490 | # if ($revrec ne 'y') {
|
|---|
| 491 | # print a separate A record. Arguably we could use an = record here instead.
|
|---|
| 492 | # print $fh "+$rec:$ip:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 493 | # print $fh "$rec $ttl IN A $ip\n" or die $!;
|
|---|
| 494 | # }
|
|---|
| 495 | $recdata = "$lastoct.$arpabase $ttl IN PTR $rec\n";
|
|---|
| 496 | } else {
|
|---|
| 497 | # A record, not merged
|
|---|
| 498 | # print $fh "=$rec:$ip:$ttl:$stamp:$loc\n" or die $!;
|
|---|
| 499 | # print $fh "$rec $ttl IN A $ip\n" or die $!;
|
|---|
| 500 | $recdata = "$rec $ttl IN A $ip\n";
|
|---|
| 501 | }
|
|---|
| 502 | # and finally
|
|---|
| 503 | recprint($zonefiles, $loclist, $loc, $recdata);
|
|---|
| 504 | } # foreach (@iplist)
|
|---|
| 505 | } # __publish_template_bind()
|
|---|
| 506 |
|
|---|
| 507 |
|
|---|
| 508 | # actual record printing sub
|
|---|
| 509 | # loop on the locations here so we don't end up with a huge pot of copypasta
|
|---|
| 510 | sub recprint {
|
|---|
| 511 | my ($zonefiles, $loclist, $loc, $recdata) = @_;
|
|---|
| 512 | if ($loc eq '') {
|
|---|
| 513 | # "common" record visible in all locations
|
|---|
| 514 | foreach my $rloc (@{$loclist}) {
|
|---|
| 515 | print {$zonefiles->{$rloc}} $recdata or die $!;
|
|---|
| 516 | }
|
|---|
| 517 | } else {
|
|---|
| 518 | # record with specific location tagged
|
|---|
| 519 | print {$zonefiles->{$loc}} $recdata or die $!;
|
|---|
| 520 | }
|
|---|
| 521 | }
|
|---|
| 522 |
|
|---|
| 523 | 1;
|
|---|
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