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<?php
require_once 'includes/status_messages.php';
require_once 'config.php';
/**
* Manage DHCP configuration
*/
function DisplayDHCPConfig()
{
$status = new StatusMessages();
if (!RASPI_MONITOR_ENABLED) {
if (isset($_POST['savedhcpdsettings'])) {
saveDHCPConfig($status);
}
}
exec('pidof dnsmasq | wc -l', $dnsmasq);
$dnsmasq_state = ($dnsmasq[0] > 0);
if (!RASPI_MONITOR_ENABLED) {
if (isset($_POST['startdhcpd'])) {
if ($dnsmasq_state) {
$status->addMessage('dnsmasq already running', 'info');
} else {
exec('sudo /bin/systemctl start dnsmasq.service', $dnsmasq, $return);
if ($return == 0) {
$status->addMessage('Successfully started dnsmasq', 'success');
$dnsmasq_state = true;
} else {
$status->addMessage('Failed to start dnsmasq', 'danger');
}
}
} elseif (isset($_POST['stopdhcpd'])) {
if ($dnsmasq_state) {
exec('sudo /bin/systemctl stop dnsmasq.service', $dnsmasq, $return);
if ($return == 0) {
$status->addMessage('Successfully stopped dnsmasq', 'success');
$dnsmasq_state = false;
} else {
$status->addMessage('Failed to stop dnsmasq', 'danger');
}
} else {
$status->addMessage('dnsmasq already stopped', 'info');
}
}
}
getWifiInterface();
$ap_iface = $_SESSION['ap_interface'];
$serviceStatus = $dnsmasq_state ? "up" : "down";
exec('cat '. RASPI_DNSMASQ_PREFIX.'raspap.conf', $return);
$conf = ParseConfig($return);
exec('cat '. RASPI_DNSMASQ_PREFIX.$ap_iface.'.conf', $return);
$conf = array_merge(ParseConfig($return));
$hosts = (array)$conf['dhcp-host'];
$upstreamServers = (array)$conf['server'];
exec("ip -o link show | awk -F': ' '{print $2}'", $interfaces);
exec('cat ' . RASPI_DNSMASQ_LEASES, $leases);
echo renderTemplate(
"dhcp", compact(
"status",
"serviceStatus",
"dnsmasq_state",
"ap_iface",
"conf",
"hosts",
"upstreamServers",
"interfaces",
"leases"
)
);
}
/**
* Saves a DHCP configuration
*
* @return object $status
*/
function saveDHCPConfig($status)
{
$iface = $_POST['interface'];
$return = 1;
// handle disable dhcp option
if (!isset($_POST['dhcp-iface']) && file_exists(RASPI_DNSMASQ_PREFIX.$iface.'.conf')) {
// remove dhcp + dnsmasq configs for selected interface
$return = removeDHCPConfig($iface,$status);
$return = removeDnsmasqConfig($iface,$status);
} else {
$errors = validateDHCPInput();
if (empty($errors)) {
$return = updateDHCPConfig($iface,$status);
} else {
$status->addMessage($errors, 'danger');
}
if ($return == 1) {
$status->addMessage('Dnsmasq configuration failed to be updated.', 'danger');
return false;
}
if (($_POST['dhcp-iface'] == "1")) {
$return = updateDnsmasqConfig($iface,$status);
}
if ($return == 0) {
$status->addMessage('Dnsmasq configuration updated successfully.', 'success');
} else {
$status->addMessage('Dnsmasq configuration failed to be updated.', 'danger');
return false;
}
return true;
}
}
/**
* Validates DHCP user input from the $_POST object
*
* @return string $errors
*/
function validateDHCPInput()
{
define('IFNAMSIZ', 16);
$iface = $_POST['interface'];
if (!preg_match('/^[^\s\/\\0]+$/', $iface)
|| strlen($iface) >= IFNAMSIZ
) {
$errors .= _('Invalid interface name.').'<br />'.PHP_EOL;
}
if (!filter_var($_POST['StaticIP'], FILTER_VALIDATE_IP) && !empty($_POST['StaticIP'])) {
$errors .= _('Invalid static IP address.').'<br />'.PHP_EOL;
}
if (!filter_var($_POST['SubnetMask'], FILTER_VALIDATE_IP) && !empty($_POST['SubnetMask'])) {
$errors .= _('Invalid subnet mask.').'<br />'.PHP_EOL;
}
if (!filter_var($_POST['DefaultGateway'], FILTER_VALIDATE_IP) && !empty($_POST['DefaultGateway'])) {
$errors .= _('Invalid default gateway.').'<br />'.PHP_EOL;
var_dump($_POST['DefaultGateway']);
die();
}
if (($_POST['dhcp-iface'] == "1")) {
if (!filter_var($_POST['RangeStart'], FILTER_VALIDATE_IP) && !empty($_POST['RangeStart'])) {
$errors .= _('Invalid DHCP range start.').'<br />'.PHP_EOL;
}
if (!filter_var($_POST['RangeEnd'], FILTER_VALIDATE_IP) && !empty($_POST['RangeEnd'])) {
$errors .= _('Invalid DHCP range end.').'<br />'.PHP_EOL;
}
if (!ctype_digit($_POST['RangeLeaseTime']) && $_POST['RangeLeaseTimeUnits'] !== 'infinite') {
$errors .= _('Invalid DHCP lease time, not a number.').'<br />'.PHP_EOL;
}
if (!in_array($_POST['RangeLeaseTimeUnits'], array('m', 'h', 'd', 'infinite'))) {
$errors .= _('Unknown DHCP lease time unit.').'<br />'.PHP_EOL;
}
if ($_POST['Metric'] !== '' && !ctype_digit($_POST['Metric'])) {
$errors .= _('Invalid metric value, not a number.').'<br />'.PHP_EOL;
}
}
return $errors;
}
/**
* Compares to string IPs
*
* @param string $ip1
* @param string $ip2
* @return boolean $result
*/
function compareIPs($ip1, $ip2)
{
$ipu1 = sprintf('%u', ip2long($ip1["ip"])) + 0;
$ipu2 = sprintf('%u', ip2long($ip2["ip"])) + 0;
return $ipu1 > $ipu2;
}
/**
* Updates a dnsmasq configuration
*
* @param string $iface
* @param object $status
* @return boolean $result
*/
function updateDnsmasqConfig($iface,$status)
{
$config = '# RaspAP '.$iface.' configuration'.PHP_EOL;
$config .= 'interface='.$iface.PHP_EOL.'dhcp-range='.$_POST['RangeStart'].','.$_POST['RangeEnd'].','.$_POST['SubnetMask'].',';
if ($_POST['RangeLeaseTimeUnits'] !== 'infinite') {
$config .= $_POST['RangeLeaseTime'];
}
$config .= $_POST['RangeLeaseTimeUnits'].PHP_EOL;
// Static leases
$staticLeases = array();
for ($i=0; $i < count($_POST["static_leases"]["mac"]); $i++) {
$mac = trim($_POST["static_leases"]["mac"][$i]);
$ip = trim($_POST["static_leases"]["ip"][$i]);
$comment = trim($_POST["static_leases"]["comment"][$i]);
if ($mac != "" && $ip != "") {
$staticLeases[] = array('mac' => $mac, 'ip' => $ip, 'comment' => $comment);
}
}
// Sort ascending by IPs
usort($staticLeases, "compareIPs");
// Update config
for ($i = 0; $i < count($staticLeases); $i++) {
$mac = $staticLeases[$i]['mac'];
$ip = $staticLeases[$i]['ip'];
$comment = $staticLeases[$i]['comment'];
$config .= "dhcp-host=$mac,$ip # $comment".PHP_EOL;
}
if ($_POST['no-resolv'] == "1") {
$config .= "no-resolv".PHP_EOL;
}
foreach ($_POST['server'] as $server) {
$config .= "server=$server".PHP_EOL;
}
if ($_POST['DNS1']) {
$config .= "dhcp-option=6," . $_POST['DNS1'];
if ($_POST['DNS2']) {
$config .= ','.$_POST['DNS2'];
}
$config .= PHP_EOL;
}
file_put_contents("/tmp/dnsmasqdata", $config);
$msg = file_exists(RASPI_DNSMASQ_PREFIX.$iface.'.conf') ? 'updated' : 'added';
system('sudo cp /tmp/dnsmasqdata '.RASPI_DNSMASQ_PREFIX.$iface.'.conf', $result);
if ($result == 0) {
$status->addMessage('Dnsmasq configuration for '.$iface.' '.$msg.'.', 'success');
}
// write default 090_raspap.conf
$config = '# RaspAP default config'.PHP_EOL;
$config .='log-facility='.RASPI_DHCPCD_LOG.PHP_EOL;
$config .='conf-dir=/etc/dnsmasq.d'.PHP_EOL;
// handle log option
if ($_POST['log-dhcp'] == "1") {
$config .= "log-dhcp".PHP_EOL;
}
if ($_POST['log-queries'] == "1") {
$config .= "log-queries".PHP_EOL;
}
$config .= PHP_EOL;
file_put_contents("/tmp/dnsmasqdata", $config);
system('sudo cp /tmp/dnsmasqdata '.RASPI_DNSMASQ_PREFIX.'raspap.conf', $result);
return $result;
}
/**
* Updates a dhcp configuration
*
* @param string $iface
* @param object $status
* @return boolean $result
*/
function updateDHCPConfig($iface,$status)
{
$cfg[] = '# RaspAP '.$iface.' configuration';
$cfg[] = 'interface '.$iface;
if (isset($_POST['StaticIP'])) {
$mask = ($_POST['SubnetMask'] !== '' && $_POST['SubnetMask'] !== '0.0.0.0') ? '/'.mask2cidr($_POST['SubnetMask']) : null;
$cfg[] = 'static ip_address='.$_POST['StaticIP'].$mask;
}
if (isset($_POST['DefaultGateway'])) {
$cfg[] = 'static routers='.$_POST['DefaultGateway'];
}
if ($_POST['DNS1'] !== '' || $_POST['DNS2'] !== '') {
$cfg[] = 'static domain_name_server='.$_POST['DNS1'].' '.$_POST['DNS2'];
}
if ($_POST['Metric'] !== '') {
$cfg[] = 'metric '.$_POST['Metric'];
}
if ($_POST['Fallback'] == 1) {
$cfg[] = 'profile static_'.$iface;
$cfg[] = 'fallback static_'.$iface;
}
$cfg[] = $_POST['DefaultRoute'] == '1' ? 'gateway' : 'nogateway';
$dhcp_cfg = file_get_contents(RASPI_DHCPCD_CONFIG);
if (!preg_match('/^interface\s'.$iface.'$/m', $dhcp_cfg)) {
$cfg[] = PHP_EOL;
$cfg = join(PHP_EOL, $cfg);
$dhcp_cfg .= $cfg;
$status->addMessage('DHCP configuration for '.$iface.' added.', 'success');
} else {
$cfg = join(PHP_EOL, $cfg);
$dhcp_cfg = preg_replace('/^#\sRaspAP\s'.$iface.'\s.*?(?=\s*^\s*$)/ms', $cfg, $dhcp_cfg, 1);
$status->addMessage('DHCP configuration for '.$iface.' updated.', 'success');
}
file_put_contents("/tmp/dhcpddata", $dhcp_cfg);
system('sudo cp /tmp/dhcpddata '.RASPI_DHCPCD_CONFIG, $result);
return $result;
}