private function validateHost($host, &$isWildcard)
{
global $config;
/* dnsmasq allows wildcard entries by prefixing a host with a
period. This constructor recognizes that and appends something
in front of the host during validation so that it passes. */
if (strpos($host, '.') === 0) {
$host = "a{$host}";
$isWildcard = TRUE;
} else {
$isWildcard = FALSE;
}
/* This is the most lazy solution yet to validate a
host, but who wants to deal with regular expression? */
if (filter_var("http://{$host}/index.htnl?q=1", FILTER_VALIDATE_URL) === FALSE) {
return FALSE;
}
/* Maybe exclude host */
if ($isWildcard === FALSE && $config['exclude_unresolved_hosts']) {
if (HostEntry::hostHasResolvableAddress($host, 'A') === FALSE && HostEntry::hostHasResolvableAddress($host, 'AAAA') === FALSE && HostEntry::hostHasResolvableAddress($host, 'CNAME') === FALSE) {
return FALSE;
}
}
return TRUE;
}
function domains_from_list($listUrl)
{
/* Perform request for contents. */
$curlHandle = curl_init();
curl_setopt($curlHandle, CURLOPT_URL, $listUrl);
curl_setopt($curlHandle, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curlHandle, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curlHandle, CURLOPT_SSL_VERIFYHOST, true);
curl_setopt($curlHandle, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($curlHandle, CURLOPT_TIMEOUT, 15);
curl_setopt($curlHandle, CURLOPT_USERAGENT, 'Mozilla/5.0 (X11; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0');
$listContents = curl_exec($curlHandle);
curl_close($curlHandle);
if ($listContents === FALSE) {
return FALSE;
}
/* Process returned result */
$final_result = array();
/* Have to use regular expression for splitting into
an array because of many different line endings. */
$lines = preg_split("/(\r\n|\n|\r)/", $listContents);
foreach ($lines as $line) {
$line = trim($line);
/* If string is empty or starts with # (comment),
then ignore this entry. */
if (strlen($line) === 0 || strpos($line, '#') === 0) {
continue;
}
/* Attempt to parse dnsmasq address= lists */
$isWildcardHost = FALSE;
if (strpos($line, 'address=/') === 0) {
$lineItems = explode('/', $line);
if ($lineItems && count($lineItems) === 3) {
$line = $lineItems[1];
goto validate_address;
}
}
/* Attempt to split up line using combinations of
tab and space characters. */
$lineItems = preg_split("/([\\s\t]+)/", $line);
/* If our string split up and we have 2 entries, then
the file was probably a hosts file. We validate the
first item to ensure that it was an IP address to
back this assumption. */
if ($lineItems && count($lineItems) === 2) {
if (filter_var($lineItems[0], FILTER_VALIDATE_IP)) {
$line = $lineItems[1];
}
}
validate_address:
/* Check wether the remainder is a host */
$hostEntry = HostEntry::newEntry($line);
if ($hostEntry !== NULL) {
$final_result[] = $hostEntry;
}
}
return $final_result;
}
