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handle the case when gethostbynamel() returns false to act like gethostbyname() in support for multi homed name servers

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Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
This commit is contained in:
Michael Kaufmann (d00p)
2016-03-11 21:23:26 +01:00
parent 6b032839ce
commit 579854f5a5
1 changed files with 14 additions and 10 deletions
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14
scripts/jobs/cron_tasks.inc.dns.10.bind.php
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@@ -33,21 +33,25 @@ class bind {
if (Settings::Get('system.nameservers') != '') {
$nameservers = explode(',', Settings::Get('system.nameservers'));
foreach ($nameservers as $nameserver) {
$nameserver = trim($nameserver);
// DNS servers might be multi homed; allow transfer from all ip
// addresses of the DNS server
$nameserver_ips = gethostbynamel(trim($nameserver));
// ignore invalid responses
if (is_array($nameserver_ips)) {
$nameserver_ips = gethostbynamel($nameserver);
// append dot to hostname
if (substr($nameserver, -1, 1) != '.') {
$nameserver.= '.';
}
// ignore invalid responses
if (!is_array($nameserver_ips)) {
// act like gethostbyname() and return unmodified hostname on error
$nameserver_ips = array($nameserver);
}
$this->nameservers[] = array(
'hostname' => trim($nameserver),
'hostname' => $nameserver,
'ips' => $nameserver_ips
);
}
}
}
if (Settings::Get('system.mxservers') != '') {
$mxservers = explode(',', Settings::Get('system.mxservers'));