raspap-webgui/includes/dhcp.php

<?php

require_once 'config.php';

use RaspAP\Networking\Hotspot\DhcpcdManager;
use RaspAP\Networking\Hotspot\DnsmasqManager;
use RaspAP\Networking\Hotspot\WiFiManager;
use RaspAP\Messages\StatusMessage;

/**
 * Displays DHCP configuration
 */
function DisplayDHCPConfig()
{
    $status = new StatusMessage();
    $wifi = new WiFiManager();
    $wifi->getWifiInterface();

    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');
            }
        }
    }
    $ap_iface = $_SESSION['ap_interface'];
    $serviceStatus = $dnsmasq_state ? "up" : "down";
    exec('cat '. RASPI_DNSMASQ_PREFIX.'raspap.conf', $return);
    $log_dhcp = (preg_grep('/log-dhcp/', $return));
    $log_queries = (preg_grep('/log-queries/', $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);

    count($log_dhcp) > 0 ? $conf['log-dhcp'] = true : false ;
    count($log_queries) > 0 ? $conf['log-queries'] = true : false ;

    exec('sudo /bin/chmod o+r '.RASPI_DHCPCD_LOG);
    $logdata = getLogLimited(RASPI_DHCPCD_LOG);

    echo renderTemplate(
        "dhcp", compact(
            "status",
            "serviceStatus",
            "dnsmasq_state",
            "ap_iface",
            "conf",
            "hosts",
            "upstreamServers",
            "interfaces",
            "leases",
            "logdata"
        )
    );
}

/**
 * Saves a DHCP configuration
 *
 * @return object $status
 */
function saveDHCPConfig($status)
{
    $dhcpcd = new DhcpcdManager();
    $dnsmasq = new DnsmasqManager();
    $iface = $_POST['interface'];
    $return = 1;

    // dhcp
    if (!isset($_POST['dhcp-iface']) && file_exists(RASPI_DNSMASQ_PREFIX.$iface.'.conf')) {
        // remove dhcp + dnsmasq configs for selected interface
        $return = $dhcpcd->remove($iface, $status);
        $return = $dnsmasq->remove($iface, $status);
    } else {
        $errors = $dhcpcd->validate($_POST);
        if (empty($errors)) {
            $return = updateDHCPConfig($iface, $status);
        } else {
            foreach ($errors as $error) {
                $status->addMessage($error, 'danger');
            }
        }
        if ($return == 1) {
            $status->addMessage('DHCP configuration failed to be updated.', 'danger');
            return false;
        }

        // dnsmasq
        if (($_POST['dhcp-iface'] == "1") || (isset($_POST['mac']))) {
            $errors = $dnsmasq->validate($_POST);
            if (empty($errors)) {
                $config = $dnsmasq->buildEx($iface, $_POST);
                $return = $dnsmasq->saveConfig($config, $iface);
                $config = $dnsmasq->buildDefault();
                $return = $dnsmasq->saveConfigDefault($config);
            } else {
                foreach ($errors as $error) {
                    $status->addMessage($error, 'danger');
                }
                $return = 1;
            }
        }
        return true;
    }
}

/**
 * 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']) && $_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']) && $_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'] ?? 0) == 1) {
        $cfg[] = 'profile static_'.$iface;
        $cfg[] = 'fallback static_'.$iface;
    }
    $cfg[] = ($_POST['DefaultRoute'] ?? '') == '1' ? 'gateway' : 'nogateway';
    if (substr($iface, 0, 2) === "wl" && ($_POST['NoHookWPASupplicant'] ?? '') == '1') {
        $cfg[] = 'nohook wpa_supplicant';
    }
    $dhcp_cfg = file_get_contents(RASPI_DHCPCD_CONFIG);
    if (!preg_match('/^interface\s'.$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;
}