remove prior captive portal leftovers

src/opnsense/mvc/app/models/OPNsense/CaptivePortal/ARP.php

-<?php
-/**
- *    Copyright (C) 2015 Deciso B.V.
- *
- *    All rights reserved.
- *
- *    Redistribution and use in source and binary forms, with or without
- *    modification, are permitted provided that the following conditions are met:
- *
- *    1. Redistributions of source code must retain the above copyright notice,
- *       this list of conditions and the following disclaimer.
- *
- *    2. Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *
- *    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- *    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- *    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- *    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
- *    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- *    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- *    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- *    POSSIBILITY OF SUCH DAMAGE.
- *
- */
-namespace OPNsense\CaptivePortal;
-
-use \OPNsense\Core;
-
-/**
- * Class ARP  provides access to the systems ARP table
- * @package OPNsense\CaptivePortal
- */
-class ARP
-{
-
-    /**
-     * pointer to shell object
-     * @var \Core\Shell
-     */
-    private $shell;
-
-    /**
-     * construct new ARP table handlers
-     */
-    public function __construct()
-    {
-        $this->shell = new Core\Shell();
-    }
-
-    /**
-     * set static arp entry
-     * @param $ipaddress|string hosts ipaddress
-     * @param $mac|string hosts physical address
-     */
-    public function setStatic($ipaddress, $mac)
-    {
-        // validate input, only set static entries for valid addresses
-        if (preg_match('/^([a-fA-F0-9]{2}:){5}[a-fA-F0-9]{2}$/', trim($mac))) {
-            if (filter_var($ipaddress, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6)) {
-                $this->shell->exec("/usr/sbin/arp -s " . trim($ipaddress) . " " . trim($mac));
-            }
-        }
-    }
-
-    /**
-     * drop static arp entry
-     * @param $ipaddress|string hosts ipaddress
-     */
-    public function dropStatic($ipaddress)
-    {
-        // validate input, drop arp entry
-        if (filter_var($ipaddress, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6)) {
-            $this->shell->exec("/usr/sbin/arp -d " . trim($ipaddress));
-        }
-    }
-
-    /**
-     * Return arp table hashed by mac address
-     */
-    public function getMACs()
-    {
-        $result = array();
-        $shell_output = array();
-        // execute arp shell command and collect (only valid) info into named array
-        if ($this->shell->exec('arp -an', false, $shell_output) == 0) {
-            foreach ($shell_output as $line) {
-                $line_parts = explode(" ", $line);
-                if (sizeof($line_parts) >= 4) {
-                    $ipaddress = substr($line_parts[1], 1, strlen($line_parts[1]) - 2);
-                    // reformat mac addresses, sometimes arp return segments without trailing zero's
-                    $mac_raw = strtolower($line_parts[3]);
-                    $mac = "";
-                    foreach (explode(":", $mac_raw) as $segment) {
-                        if ($mac != "") {
-                            $mac .= ":";
-                        }
-                        if (strlen($segment) == 1) {
-                            $mac .= "0" . $segment;
-                        } else {
-                            $mac .= $segment;
-                        }
-                    }
-                    if (preg_match('/^([a-fA-F0-9]{2}:){5}[a-fA-F0-9]{2}$/', trim($mac))) {
-                        $result[$mac] = array('ip' => $ipaddress);
-                    }
-                }
-            }
-        }
-        return $result;
-    }
-}