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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();
$serviceStatus = $dnsmasq_state ? "up" : "down";
exec("ip -o link show | awk -F': ' '{print $2}'", $interfaces);
exec('cat ' . RASPI_DNSMASQ_LEASES, $leases);
$ap_iface = $_SESSION['ap_interface'];
echo renderTemplate(
"dhcp", compact(
"status",
"serviceStatus",
"dnsmasq_state",
"ap_iface",
"dhcpHost",
"interfaces",
"leases"
)
);
}
function SaveDHCPConfig($status)
{
$iface = $_POST['interface'];
$return = 1;
if (($_POST['dhcp-iface'] == "1")) {
$errors = ValidateDHCPInput();
if (empty($errors)) {
$return = UpdateDnsmasqCfg($iface,$status);
} else {
$status->addMessage($errors, 'danger');
}
if ($return == 1) {
$status->addMessage('Dnsmasq configuration failed to be updated.', 'danger');
return false;
}
$return = UpdateDHCPCfg($iface,$status);
// process disable dhcp option
} elseif (($_POST['dhcp-iface'] == "0") && file_exists(RASPI_DNSMASQ_PREFIX.$iface.'.conf')) {
// remove dhcp conf for selected interface
$return = RemoveDHCPCfg($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;
}
function ValidateDHCPInput()
{
define('IFNAMSIZ', 16);
$iface = $_POST['interface'];
if (!preg_match('/^[a-zA-Z0-9]+$/', $iface)
|| strlen($iface) >= IFNAMSIZ
) {
$errors .= _('Invalid interface name.').'<br />'.PHP_EOL;
}
if (!preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\z/', $_POST['RangeStart'])
&& !empty($_POST['RangeStart'])
) { // allow ''/null ?
$errors .= _('Invalid DHCP range start.').'<br />'.PHP_EOL;
}
if (!preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\z/', $_POST['RangeEnd'])
&& !empty($_POST['RangeEnd'])
) { // allow ''/null ?
$errors .= _('Invalid DHCP range end.').'<br />'.PHP_EOL;
}
if (!ctype_digit($_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;
}
return $errors;
}
function UpdateDnsmasqCfg($iface,$status)
{
$config = 'interface='.$iface.PHP_EOL.
'dhcp-range='.$_POST['RangeStart'].','.$_POST['RangeEnd'].
',255.255.255.0,';
if ($_POST['RangeLeaseTimeUnits'] !== 'infinite') {
$config .= $_POST['RangeLeaseTime'];
}
$config .= $_POST['RangeLeaseTimeUnits'].PHP_EOL;
for ($i=0; $i < count($_POST["static_leases"]["mac"]); $i++) {
$mac = trim($_POST["static_leases"]["mac"][$i]);
$ip = trim($_POST["static_leases"]["ip"][$i]);
if ($mac != "" && $ip != "") {
$config .= "dhcp-host=$mac,$ip".PHP_EOL;
}
}
if ($_POST['no-resolv'] == "1") {
$config .= "no-resolv".PHP_EOL;
}
foreach ($_POST['server'] as $server) {
$config .= "server=$server".PHP_EOL;
}
if ($_POST['log-dhcp'] == "1") {
$config .= "log-dhcp".PHP_EOL;
}
if ($_POST['log-queries'] == "1") {
$config .= "log-queries".PHP_EOL;
}
if ($_POST['DNS1']) {
$config .= "dhcp-option=6," . $_POST['DNS1'];
if ($_POST['DNS2']) {
$config .= ','.$_POST['DNS2'];
}
$config .= PHP_EOL;
}
// enable these settings on the default interface
if ($iface == "wlan0") {
$config .= "log-facility=/tmp/dnsmasq.log".PHP_EOL;
$config .= "conf-dir=/etc/dnsmasq.d".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');
}
return $result;
}
function UpdateDHCPCfg($iface,$status)
{
$net_cfg = RASPI_CONFIG_NETWORKING.'/'.$iface.'.ini';
if (!file_exists($net_cfg) || filesize($net_cfg) ==0 ) {
$status->addMessage('Static IP address for '.$iface.' not found.', 'danger');
$status->addMessage('Configure this interface in Networking > '.$iface.'.', 'danger');
$return = 1;
} else {
$dhcp_cfg = file_get_contents(RASPI_DHCPCD_CONFIG);
if (!preg_match('/^interface\s'.$iface.'$/m', $dhcp_cfg)) {
// set dhcp values from ini
$iface_cfg = parse_ini_file($net_cfg, false, INI_SCANNER_RAW);
$ip_address = $iface_cfg['ip_address'];
$domain_name_server = ($iface_cfg['domain_name_server'] =='') ? '1.1.1.1 8.8.8.8' : $iface_cfg['domain_name_server'];
// append interface config to dhcpcd.conf
$cfg = $dhcp_conf;
$cfg[] = '# RaspAP '.$iface.' configuration';
$cfg[] = 'interface '.$iface;
$cfg[] = 'static ip_address='.$ip_address;
$cfg[] = 'static domain_name_server='.$domain_name_server;
$cfg[] = PHP_EOL;
$cfg = join(PHP_EOL, $cfg);
$dhcp_cfg .= $cfg;
file_put_contents("/tmp/dhcpddata", $dhcp_cfg);
system('sudo cp /tmp/dhcpddata '.RASPI_DHCPCD_CONFIG, $result);
$status->addMessage('DHCP configuration for '.$iface.' added.', 'success');
} else {
$status->addMessage('DHCP for '.$iface.' already enabled.', 'success');
}
}
return $result;
}
function RemoveDHCPCfg($iface,$status)
{
$dhcp_cfg = file_get_contents(RASPI_DHCPCD_CONFIG);
$dhcp_cfg = preg_replace('/^#\sRaspAP\s'.$iface.'.*\n(.*\n){3}/m', '', $dhcp_cfg);
file_put_contents("/tmp/dhcpddata", rtrim($dhcp_cfg).PHP_EOL);
system('sudo cp /tmp/dhcpddata '.RASPI_DHCPCD_CONFIG, $result);
if ($result == 0) {
$status->addMessage('DHCP configuration for '.$iface.' removed.', 'success');
} else {
$status->addMessage('Failed to remove DHCP configuration for '.$iface.'.', 'danger');
return $result;
}
// remove dnsmasq eth0 conf
system('sudo rm '.RASPI_DNSMASQ_PREFIX.$iface.'.conf', $result);
if ($result == 0) {
$status->addMessage('Dnsmasq configuration for '.$iface.' removed.', 'success');
} else {
$status->addMessage('Failed to remove dnsmasq configuration for '.$iface.'.', 'danger');
}
return $result;
}