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<?php
/*
* Looking Glass - An easy to deploy Looking Glass
* Copyright (C) 2014 Guillaume Mazoyer <gmazoyer@gravitons.in>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
require_once 'config.php';
/**
* Test if a given parameter is an IPv4 or not.
*
* @param string $ip the parameter to test.
* @param boolean $ip_only optional parameter, if omitted or set to true, it
* will ensure that the first parameter is an IPv4
* address without mask, if set to false the IP/MASK
* form is considered as valid.
* @return boolean true if the parameter matches an IPv4 address, false
* otherwise.
*/
function match_ipv4($ip, $ip_only = true) {
if (strrpos($ip, '/') && !$ip_only) {
$ip_and_mask = explode('/', $ip, 2);
return filter_var($ip_and_mask[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) &&
filter_var($ip_and_mask[1], FILTER_VALIDATE_INT);
} else {
return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
}
}
/**
* Test if a given parameter is an IPv6 or not.
*
* @param string $ip the parameter to test.
* @param boolean $ip_only optional parameter, if omitted or set to true, it
* will ensure that the first parameter is an IPv6
* address without mask, if set to false the IP/MASK
* form is considered as valid.
* @return boolean true if the parameter matches an IPv6 address, false
* otherwise.
*/
function match_ipv6($ip, $ip_only = true) {
if (strrpos($ip, '/') && !$ip_only) {
$ip_and_mask = explode('/', $ip, 2);
return filter_var($ip_and_mask[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) &&
filter_var($ip_and_mask[1], FILTER_VALIDATE_INT);
} else {
return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6);
}
}
/**
* Test if a given parameter is a valid FQDN or not.
*
* @param string $fqdn the parameter to test.
* @return boolean true if the parameter matches a valid FQDN, false otherwise.
*/
function match_fqdn($fqdn) {
$regex = '/(?=^.{4,255}$)(^((?!-)[a-zA-Z0-9-]{1,63}(?<!-)\.)+[a-zA-Z]{2,63}$)/';
if ((preg_match($regex, $fqdn) === false) ||
(preg_match($regex, $fqdn) === 0)) {
return false;
} else {
return true;
}
}
/**
* Test if a given parameter is a valid AS number or not.
*
* @param integer $as the parameter to test.
* @return boolean true if the parameter matches a valid ASN, false otherwise.
*/
function match_as($as) {
global $config;
$options_wide_range = array(
'options' => array('min_range' => 1, 'max_range' => 4294967294)
);
$options_16bit_private = array(
'options' => array( 'min_range' => 64512, 'max_range' => 65534)
);
$options_32bit_private = array(
'options' => array('min_range' => 4200000000, 'max_range' => 4294967294)
);
if (!filter_var($as, FILTER_VALIDATE_INT, $options_wide_range)) {
return false;
}
if (filter_var($as, FILTER_VALIDATE_INT, $options_16bit_private)) {
return isset($config['misc']['allow_private_asn']) &&
$config['misc']['allow_private_asn'] == true;
}
if (filter_var($as, FILTER_VALIDATE_INT, $options_32bit_private)) {
return isset($config['misc']['allow_private_asn']) &&
$config['misc']['allow_private_asn'] == true;
}
return true;
}
function match_aspath_regex($aspath_regex) {
// TODO: validate a regex with a regex?
return true;
}
/**
* For a given FQDN try to find the corresponding IPv4 or IPv6 address.
*
* If there is multiple addresses attached to the same FQDN it will give the
* first IPv4 or IPv6 found.
*
* If the FQDN have both IPv4 and IPv6 addresses it will give the first IPv6
* address found.
*
* @param string $fqdn the FQDN to use to search in the DNS databases.
* @return string an IPv4 or IPv6 address based on the DNS records.
*/
function fqdn_to_ip_address($fqdn) {
$dns_record = dns_get_record($fqdn, DNS_A + DNS_AAAA);
// No DNS record found
if (!$dns_record) {
return false;
}
$records_nb = count($dns_record);
// Only one record found
if ($records_nb == 1) {
if ($dns_record[0]['type'] == 'AAAA') {
return $dns_record[0]['ipv6'];
} else if ($dns_record[0]['type'] == 'A') {
return $dns_record[0]['ip'];
} else {
return false;
}
}
// Several records found
if ($records_nb > 1) {
// TODO: this could probably be more optimal
foreach ($dns_record as $record) {
if ($record['type'] == 'AAAA') {
return $record['ipv6'];
}
}
foreach ($dns_record as $record) {
if ($record['type'] == 'AAA') {
return $record['ipv4'];
}
}
return false;
}
}
/**
* Send the given parameter to the logs file.
*
* @param string $log the log to be recorded in the logs file.
*/
function log_to_file($log) {
global $config;
$log = '['.date("Y-m-d H:i:s").'] '.$log."\n";
file_put_contents($config['misc']['logs'], $log, FILE_APPEND | LOCK_EX);
}
// End of utils.php
|
