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raspap-webgui-mirror/includes/firewall.php
billz d5eb3c510e Update en_US locale w/ new messsages
2023-03-19 16:47:55 +01:00

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<?php
require_once 'includes/status_messages.php';
require_once 'includes/functions.php';
define('RASPAP_IPTABLES_SCRIPT', "/tmp/iptables_raspap.sh");
define('RASPAP_IP6TABLES_SCRIPT', "/tmp/ip6tables_raspap.sh");
/**
*
* @param array $rule
* @param array $conf
* @return array $don
*/
function getDependson(&$rule, &$conf)
{
if (isset($rule["dependson"][0]) ) {
$don = &$rule["dependson"];
if (!empty($don[0]) && isset($conf[$don[0]["var"]]) ) {
if (!isset($don[0]["type"]) ) { $don[0]["type"]="bool";
}
return $don;
}
}
return false;
}
/**
*
* @param array $sect
* @param array $conf
* @return boolean $active
*/
function isRuleEnabled(&$sect, &$conf)
{
$fw_on = isset($conf["firewall-enable"]) && $conf["firewall-enable"];
$active = isset($sect["fw-state"]) && $sect["fw-state"]==1;
$active = $fw_on ? $active : !$active;
$active = $active || !isset($sect["fw-state"]);
if (($don = getDependson($sect, $conf)) !== false
&& $don[0]["type"] == "bool" && !$conf[$don[0]["var"]]
) { $active = false;
}
return $active;
}
/**
*
* @param array $sect
* @param array $conf
* @return string $str
*/
function createRuleStr(&$sect, &$conf)
{
if (!is_array($sect["rules"]) ) { return "";
}
$rules = $sect["rules"];
$depon = getDependson($sect, $conf);
$rs = array();
foreach ( $rules as $rule ) {
if (preg_match('/\$[a-z0-9]*\$/i', $rule) ) {
$r = array($rule);
foreach ( $depon as $dep ) {
$rr = array();
$repl=$val="";
switch ( $dep["type"] ) {
case "list":
if (isset($dep["var"]) && !empty($conf[$dep["var"]]) ) { $val = explode(' ', $conf[$dep["var"]]);
}
if (!empty($val) && isset($dep["replace"]) ) { $repl=$dep["replace"];
}
break;
case "string":
if (isset($dep["var"]) ) { $val=$conf[$dep["var"]];
}
if (!empty($val) && isset($dep["replace"]) ) { $repl=$dep["replace"];
}
break;
default:
break;
}
if (!empty($repl) && !empty($val) ) {
if (is_array($val) ) {
foreach ( $val as $v ) { $rr = array_merge($rr, str_replace($repl, $v, $r));
}
}
else { $rr = array_merge($rr, str_replace($repl, $val, $r));
}
}
$r = !empty($rr) ? $rr : $r;
}
$rs = array_merge($rs, $rr);
} else {
$rs[] = $rule;
}
}
$str="";
foreach ( $rs as $r ) {
if (!preg_match('/\$[a-z0-9]*\$/i', $r) ) { $str .= '$IPT '.$r."\n";
}
}
return $str;
}
/**
*
* @param array $rule
* @return boolean
*/
function isIPv4(&$rule)
{
return !isset($rule["ip-version"]) || strstr($rule["ip-version"], "4") !== false;
}
/**
*
* @param array $rule
* @return boolean
*/
function isIPv6(&$rule)
{
return !isset($rule["ip-version"]) || strstr($rule["ip-version"], "6") !== false;
}
/**
*
* @return boolean
*/
function configureFirewall()
{
$json = file_get_contents(RASPI_IPTABLES_CONF);
$ipt = json_decode($json, true);
$conf = ReadFirewallConf();
$txt = "#!/bin/bash\n";
file_put_contents(RASPAP_IPTABLES_SCRIPT, $txt);
file_put_contents(RASPAP_IP6TABLES_SCRIPT, $txt);
file_put_contents(RASPAP_IPTABLES_SCRIPT, 'IPT="iptables"'."\n", FILE_APPEND);
file_put_contents(RASPAP_IP6TABLES_SCRIPT, 'IPT="ip6tables"'."\n", FILE_APPEND);
$txt = "\$IPT -F\n";
$txt .= "\$IPT -X\n";
$txt .= "\$IPT -t nat -F\n";
file_put_contents(RASPAP_IPTABLES_SCRIPT, $txt, FILE_APPEND);
file_put_contents(RASPAP_IP6TABLES_SCRIPT, $txt, FILE_APPEND);
if (empty($conf) || empty($ipt) ) { return false;
}
$count=0;
foreach ( $ipt["order"] as $idx ) {
if (isset($ipt[$idx]) ) {
foreach ( $ipt[$idx] as $i => $sect ) {
if (isRuleEnabled($sect, $conf) ) {
$str_rules= createRuleStr($sect, $conf);
if (!empty($str_rules) ) {
if (isIPv4($sect) ) { file_put_contents(RASPAP_IPTABLES_SCRIPT, $str_rules, FILE_APPEND);
}
if (isIPv6($sect) ) { file_put_contents(RASPAP_IP6TABLES_SCRIPT, $str_rules, FILE_APPEND);
}
++$count;
}
}
}
}
}
if ($count > 0 ) {
exec("chmod +x ".RASPAP_IPTABLES_SCRIPT);
exec("sudo ".RASPAP_IPTABLES_SCRIPT);
exec("sudo iptables-save | sudo tee /etc/iptables/rules.v4");
unlink(RASPAP_IPTABLES_SCRIPT);
exec("chmod +x ".RASPAP_IP6TABLES_SCRIPT);
exec("sudo ".RASPAP_IP6TABLES_SCRIPT);
exec("sudo ip6tables-save | sudo tee /etc/iptables/rules.v6");
unlink(RASPAP_IP6TABLES_SCRIPT);
}
return ($count > 0);
}
/**
*
* @param array $conf
* @return string $ret
*/
function WriteFirewallConf($conf)
{
$ret = false;
if (is_array($conf) ) { write_php_ini($conf, RASPI_FIREWALL_CONF);
}
return $ret;
}
/**
*
* @return array $conf
*/
function ReadFirewallConf()
{
$conf = array();
if (file_exists(RASPI_FIREWALL_CONF) ) {
$conf = parse_ini_file(RASPI_FIREWALL_CONF);
}
if ( !isset($conf["firewall-enable"]) ) {
$conf["firewall-enable"] = false;
$conf["ssh-enable"] = false;
$conf["http-enable"] = false;
$conf["excl-devices"] = "";
$conf["excluded-ips"] = "";
$conf["ap-device"] = "";
$conf["client-device"] = "";
$conf["restricted-ips"] = "";
}
exec('ifconfig | grep -E -i "^tun[0-9]"', $ret);
$conf["openvpn-enable"] = !empty($ret);
unset($ret);
exec('ifconfig | grep -E -i "^wg[0-9]"', $ret);
$conf["wireguard-enable"] = !empty($ret);
return $conf;
}
/**
*
* @return string $ips
*/
function getVPN_IPs()
{
$ips = "";
// get openvpn and wireguard server IPs
if (RASPI_OPENVPN_ENABLED && ($fconf = glob(RASPI_OPENVPN_CLIENT_PATH ."/*.conf")) !== false && !empty($fconf) ) {
foreach ( $fconf as $f ) {
unset($result);
exec('cat '.$f.' | sed -rn "s/^remote\s*([a-z0-9\.\-\_:]*)\s*([0-9]*)\s*$/\1 \2/ip" ', $result);
if (!empty($result) ) {
$result = explode(" ", $result[0]);
$ip = (isset($result[0])) ? $result[0] : "";
$port = (isset($result[1])) ? $result[1] : "";
if (!empty($ip) ) {
$ip = gethostbyname($ip);
if (filter_var($ip, FILTER_VALIDATE_IP) && strpos($ips, $ip) === false ) { $ips .= " $ip";
}
}
}
}
}
// get wireguard server IPs
if (RASPI_WIREGUARD_ENABLED && ($fconf = glob(RASPI_WIREGUARD_PATH ."/*.conf")) !== false && !empty($fconf) ) {
foreach ( $fconf as $f ) {
unset($result);
exec('sudo /bin/cat '.$f.' | sed -rn "s/^endpoint\s*=\s*\[?([a-z0-9\.\-\_:]*)\]?:([0-9]*)\s*$/\1 \2/ip" ', $result);
if (!empty($result) ) {
$result = explode(" ", $result[0]);
$ip = (isset($result[0])) ? $result[0] : "";
$port = (isset($result[1])) ? $result[1] : "";
if (!empty($ip) ) {
$ip = gethostbyname($ip);
if (filter_var($ip, FILTER_VALIDATE_IP) && strpos($ips, $ip) === false ) { $ips .= " $ip";
}
}
}
}
}
return trim($ips);
}
/**
*
* @return array $fw_conf
*/
function getFirewallConfiguration()
{
$fw_conf = ReadFirewallConf();
$json = file_get_contents(RASPI_IPTABLES_CONF);
getWifiInterface();
$ap_device = $_SESSION['ap_interface'];
$clients = getClients();
$str_clients = "";
foreach( $clients["device"] as $dev ) {
if (!$dev["isAP"] ) {
if (!empty($str_clients) ) { $str_clients .= ", ";
}
$str_clients .= $dev["name"];
}
}
$fw_conf["ap-device"] = $ap_device;
$fw_conf["client-list"] = $str_clients;
$id=findCurrentClientIndex($clients);
if ($id >= 0 ) { $fw_conf["client-device"] = $clients["device"][$id]["name"];
}
return $fw_conf;
}
/**
*
*/
function updateFirewall()
{
$fw_conf = getFirewallConfiguration();
if ( isset($fw_conf["firewall-enable"]) ) {
WriteFirewallConf($fw_conf);
configureFirewall();
}
return;
}
/**
*
*/
function DisplayFirewallConfig()
{
$status = new StatusMessages();
$fw_conf = getFirewallConfiguration();
$ap_device = $fw_conf["ap-device"];
$str_clients = $fw_conf["client-list"];
if (!empty($_POST)) {
$fw_conf["ssh-enable"] = isset($_POST['ssh-enable']);
$fw_conf["http-enable"] = isset($_POST['http-enable']);
$fw_conf["firewall-enable"] = isset($_POST['firewall-enable']) || isset($_POST['apply-firewall']);
if (isset($_POST['firewall-enable']) ) { $status->addMessage(_('Firewall is now enabled'), 'success');
}
if (isset($_POST['apply-firewall']) ) { $status->addMessage(_('Firewall settings changed'), 'success');
}
if (isset($_POST['firewall-disable']) ) { $status->addMessage(_('Firewall is now disabled'), 'warning');
}
if (isset($_POST['save-firewall']) ) { $status->addMessage(_('Firewall settings saved. Firewall is still disabled.'), 'success');
}
if (isset($_POST['excl-devices']) ) {
$excl = filter_var($_POST['excl-devices'], FILTER_SANITIZE_STRING);
$excl = str_replace(',', ' ', $excl);
$excl = trim(preg_replace('/\s+/', ' ', $excl));
if ($fw_conf["excl-devices"] != $excl ) {
$status->addMessage(_('Exclude devices '. $excl), 'success');
$fw_conf["excl-devices"] = $excl;
}
}
if (isset($_POST['excluded-ips']) ) {
$excl = filter_var($_POST['excluded-ips'], FILTER_SANITIZE_STRING);
$excl = str_replace(',', ' ', $excl);
$excl = trim(preg_replace('/\s+/', ' ', $excl));
if (!empty($excl) ) {
$excl = explode(' ', $excl);
$str_excl = "";
foreach ( $excl as $ip ) {
if (filter_var($ip, FILTER_VALIDATE_IP) ) { $str_excl .= "$ip ";
} else { $status->addMessage(_('Exclude IP address '. $ip . ' failed - not a valid IP address'), 'warning');
}
}
}
$str_excl = trim($str_excl);
if ($fw_conf["excluded-ips"] != $str_excl ) {
$status->addMessage(_('Exclude IP address(es) '. $str_excl), 'success');
$fw_conf["excluded-ips"] = $str_excl;
}
}
WriteFirewallConf($fw_conf);
configureFirewall();
}
$vpn_ips = getVPN_IPs();
echo renderTemplate(
"firewall", compact(
"status",
"ap_device",
"str_clients",
"fw_conf",
"vpn_ips"
)
);
}
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