librenms-librenms/html/includes/table/arp-search.inc.php

<?php

$param = array();

$sql .= ' FROM `ipv4_mac` AS M, `ports` AS P, `devices` AS D ';

if (is_admin() === false && is_read() === false) {
    $sql    .= ' LEFT JOIN `devices_perms` AS `DP` ON `D`.`device_id` = `DP`.`device_id`';
    $where  .= ' AND `DP`.`user_id`=?';
    $param[] = $_SESSION['user_id'];
}

$sql .= " WHERE M.port_id = P.port_id AND P.device_id = D.device_id $where ";

if (isset($_POST['searchby']) && $_POST['searchby'] == 'ip') {
    $sql    .= ' AND `ipv4_address` LIKE ?';
    $param[] = '%'.trim($_POST['address']).'%';
}
else if (isset($_POST['searchby']) && $_POST['searchby'] == 'mac') {
    $sql    .= ' AND `mac_address` LIKE ?';
    $param[] = '%'.str_replace(array(':', ' ', '-', '.', '0x'), '', mres($_POST['address'])).'%';
}

if (is_numeric($_POST['device_id'])) {
    $sql    .= ' AND P.device_id = ?';
    $param[] = $_POST['device_id'];
}

$count_sql = "SELECT COUNT(`M`.`port_id`) $sql";

$total = dbFetchCell($count_sql, $param);
if (empty($total)) {
    $total = 0;
}

if (!isset($sort) || empty($sort)) {
    $sort = '`hostname` ASC';
}

$sql .= " ORDER BY $sort";

if (isset($current)) {
    $limit_low  = (($current * $rowCount) - ($rowCount));
    $limit_high = $rowCount;
}

if ($rowCount != -1) {
    $sql .= " LIMIT $limit_low,$limit_high";
}

$sql = "SELECT *,`P`.`ifDescr` AS `interface` $sql";

foreach (dbFetchRows($sql, $param) as $entry) {
    if (!$ignore) {
        if ($entry['ifInErrors'] > 0 || $entry['ifOutErrors'] > 0) {
            $error_img = generate_port_link($entry, "<img src='images/16/chart_curve_error.png' alt='Interface Errors' border=0>", port_errors);
        }
        else {
            $error_img = '';
        }

        $arp_host = dbFetchRow('SELECT * FROM ipv4_addresses AS A, ports AS I, devices AS D WHERE A.ipv4_address = ? AND I.port_id = A.port_id AND D.device_id = I.device_id', array($entry['ipv4_address']));
        if ($arp_host) {
            $arp_name = generate_device_link($arp_host);
        }
        else {
            unset($arp_name);
        }

        if ($arp_host) {
            $arp_if = generate_port_link($arp_host);
        }
        else {
            unset($arp_if);
        }

        if ($arp_host['device_id'] == $entry['device_id']) {
            $arp_name = 'Localhost';
        }

        if ($arp_host['port_id'] == $entry['port_id']) {
            $arp_if = 'Local port';
        }

        $response[] = array(
            'mac_address'      => formatMac($entry['mac_address']),
            'ipv4_address'     => $entry['ipv4_address'],
            'hostname'         => generate_device_link($entry),
            'interface'        => generate_port_link($entry, makeshortif(fixifname(ifLabel($entry['label'])))).' '.$error_img,
            'remote_device'    => $arp_name,
            'remote_interface' => $arp_if,
        );
    }//end if

    unset($ignore);
}//end foreach

$output = array(
    'current'  => $current,
    'rowCount' => $rowCount,
    'rows'     => $response,
    'total'    => $total,
);
echo _json_encode($output);