<?php
/*
----------------------------------------------------------------------
LICENSE
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License (GPL)
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
To read the license please visit http://www.gnu.org/copyleft/gpl.html
----------------------------------------------------------------------
*/
/**
* Manages BIND 9+ zone management templates in AlternC 3.5+
*
* @copyright AlternC-Team 2000-2018 https://alternc.com/
*/
class m_bind {
var $shouldreload;
var $shouldreconfig;
var $ZONE_TEMPLATE ="/etc/alternc/templates/bind/templates/zone.template";
var $NAMED_TEMPLATE ="/etc/alternc/templates/bind/templates/named.template";
var $NAMED_CONF ="/var/lib/alternc/bind/automatic.conf";
var $RNDC ="/usr/sbin/rndc";
var $zone_file_directory = '/var/lib/alternc/bind/zones';
// ------------------------------------------------------------
/** Hook launched before any action by updatedomains
* initialize the reload/reconfig flags used by POST
* @NOTE launched as ROOT
*/
function hook_updatedomains_dns_pre() {
$this->shouldreload=false;
$this->shouldreconfig=false;
}
// ------------------------------------------------------------
/**
* Hook launched for each ZONE for which we want a zone update (or create)
* update the zone, create it if necessary,
* and ask for reload or reconfig of bind9 depending on what happened
* @NOTE launched as ROOT
*/
function hook_updatedomains_dns_add($dominfo) {
global $L_FQDN,$L_NS1_HOSTNAME,$L_NS2_HOSTNAME,$L_DEFAULT_MX,$L_DEFAULT_SECONDARY_MX,$L_PUBLIC_IP,$L_PUBLIC_IPV6;
$domain = $dominfo["domaine"];
$ttl = $dominfo["zonettl"];
// does it already exist?
if (file_exists($this->zone_file_directory."/".$domain)) {
list($islocked,$serial,$more)=$this->read_zone($domain);
$serial++; // only increment serial for new zones
} else {
$more="";
$serial=date("Ymd")."00";
$islocked=false;
}
if ($islocked) return;
// Prepare a new zonefile from a template
$zone = file_get_contents($this->ZONE_TEMPLATE);
// add the SUBDOMAIN entries
$zone .= $this->conf_from_db($domain);
// substitute ALTERNC & domain variables
$zone = strtr($zone, array(
"%%fqdn%%" => "$L_FQDN",
"%%ns1%%" => "$L_NS1_HOSTNAME",
"%%ns2%%" => "$L_NS2_HOSTNAME",
"%%DEFAULT_MX%%" => "$L_DEFAULT_MX",
"%%DEFAULT_SECONDARY_MX%%" => "$L_DEFAULT_SECONDARY_MX",
"@@fqdn@@" => "$L_FQDN",
"@@ns1@@" => "$L_NS1_HOSTNAME",
"@@ns2@@" => "$L_NS2_HOSTNAME",
"@@DEFAULT_MX@@" => "$L_DEFAULT_MX",
"@@DEFAULT_SECONDARY_MX@@" => "$L_DEFAULT_SECONDARY_MX",
"@@DOMAINE@@" => $domain,
"@@SERIAL@@" => $serial,
"@@PUBLIC_IP@@" => "$L_PUBLIC_IP",
"@@PUBLIC_IPV6@@" => "$L_PUBLIC_IPV6",
"@@ZONETTL@@" => $ttl,
));
// add the "END ALTERNC CONF line";
$zone .= ";;; END ALTERNC AUTOGENERATE CONFIGURATION\n";
// add the manually entered info:
$zone .= $more;
file_put_contents($this->zone_file_directory."/".$domain,$zone);
// add the line into bind9 conf:
if (add_line_to_file(
$this->NAMED_CONF,
trim(strtr(
file_get_contents($this->NAMED_TEMPLATE),
array(
"@@DOMAIN@@" => $domain,
"@@ZONE_FILE@@" => $this->zone_file_directory."/".$domain
)
)))
) {
$this->shouldreconfig=true;
} else {
$this->shouldreload=true;
}
}
// ------------------------------------------------------------
/**
* Hook launched for each ZONE for which we want a zone DELETE
* remove the zone and its file,
* and if any action happened, ask for bind RECONFIG at posttime
* @NOTE launched as ROOT
*/
function hook_updatedomains_dns_del($dominfo) {
$domain = $dominfo["domaine"];
if (del_line_from_file(
$this->NAMED_CONF,
trim(strtr(
file_get_contents($this->NAMED_TEMPLATE),
array(
"@@DOMAIN@@" => $domain,
"@@ZONE_FILE@@" => $this->zone_file_directory."/".$domain
)
)))
) {
$this->shouldreconfig=true;
} else {
return;
}
@unlink($this->zone_file_directory."/".$domain);
}
// ------------------------------------------------------------
/**
* Hook function launched at the very end of updatedomains
* here, we just reload OR reconfig (or both) bind9 depending
* on what happened before.
* @NOTE launched as ROOT
*/
function hook_updatedomains_dns_post() {
global $msg;
if ($this->shouldreload) {
$ret=0;
exec($this->RNDC." reload 2>&1",$out,$ret);
if ($ret!=0) {
$msg->raise("ERROR","bind","Error while reloading bind, error code is $ret\n".implode("\n",$out));
} else {
$msg->raise("INFO","bind","Bind reloaded");
}
}
if ($this->shouldreconfig) {
$ret=0;
exec($this->RNDC." reconfig 2>&1",$out,$ret);
if ($ret!=0) {
$msg->raise("ERROR","bind","Error while reconfiguring bind, error code is $ret\n".implode("\n",$out));
} else {
$msg->raise("INFO","bind","Bind reconfigured");
}
}
}
// ------------------------------------------------------------
/**
* read a zone file for $domain,
* @param $domain string the domain name
* @return array with 3 informations:
* is the domain locked? (boolean), what's the current serial (integer), the data after alternc conf (string of lines)
*/
function read_zone($domain) {
$f=fopen($this->zone_file_directory."/".$domain,"rb");
$islocked=false;
$more="";
$serial=date("Ymd")."00";
while ($s=fgets($f,4096)) {
if (preg_match("#\;\s*LOCKED:YES#i",$s)) {
$islocked=true;
}
if (preg_match("/\s*(\d{10})\s+\;\sserial\s?/", $s,$mat)) {
$serial=$mat[1];
}
if (preg_match('/\;\s*END\sALTERNC\sAUTOGENERATE\sCONFIGURATION(.*)/s', $s)) {
break;
}
}
while ($s=fgets($f,4096)) {
$more.=$s;
}
return array($islocked,$serial,$more);
}
// ------------------------------------------------------------
/**
* Return the part of the conf we got from the sub_domaines table
* @global m_mysql $db
* @param string $domain
* @return string a zonefile excerpt
*/
function conf_from_db($domain) {
global $db;
$db->query("
SELECT
REPLACE(REPLACE(dt.entry,'%TARGET%',sd.valeur), '%SUB%', if(length(sd.sub)>0,sd.sub,'@')) AS ENTRY
FROM
sub_domaines sd,
domaines_type dt
WHERE
sd.type=dt.name
AND sd.enable IN ('ENABLE', 'ENABLED')
ORDER BY ENTRY ;");
$t="";
while ($db->next_record()) {
$t.= $db->f('ENTRY')."\n";
}
return $t;
}
} // m_bind