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4 | daniel-mar | 1 | <?php |
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3 | /* |
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4 | * IP functions |
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5 | * Copyright 2015-2022 Daniel Marschall, ViaThinkSoft |
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6 | * Version 2021-01-07 |
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7 | * |
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8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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9 | * you may not use this file except in compliance with the License. |
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10 | * You may obtain a copy of the License at |
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11 | * |
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12 | * http://www.apache.org/licenses/LICENSE-2.0 |
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13 | * |
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14 | * Unless required by applicable law or agreed to in writing, software |
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15 | * distributed under the License is distributed on an "AS IS" BASIS, |
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16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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17 | * See the License for the specific language governing permissions and |
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18 | * limitations under the License. |
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19 | */ |
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20 | |||
21 | // Attention in re $allow_proxy: It is not secure to use these, since they are not validated: http://www.thespanner.co.uk/2007/12/02/faking-the-unexpected/ |
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22 | function get_real_ip($allow_proxy=false) { |
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23 | /* Eindeutige IP Adresse erhalten, auch bei Proxies und (neu:) von SSH connections im CLI modus */ |
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24 | // http://lists.phpbar.de/pipermail/php/Week-of-Mon-20040322/007749.html |
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25 | // Modificated by VTS |
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26 | // Version: 2021-01-07 |
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27 | |||
28 | // TODO: ipv6 |
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29 | |||
30 | if (isset($_SERVER['SSH_CLIENT'])) { $ary = explode(' ', $_SERVER['SSH_CLIENT']); return $ary[0]; } |
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31 | if (isset($_SERVER['SSH_CONNECTION'])) { $ary = explode(' ', $_SERVER['SSH_CONNECTION']); return $ary[0]; } |
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32 | |||
33 | $client_ip = ($allow_proxy && isset($_SERVER['HTTP_CLIENT_IP'])) ? $_SERVER['HTTP_CLIENT_IP'] : ''; |
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34 | $x_forwarded_for = ($allow_proxy && isset($_SERVER['HTTP_X_FORWARDED_FOR'])) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : ''; |
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35 | $remote_addr = (isset($_SERVER['REMOTE_ADDR'])) ? $_SERVER['REMOTE_ADDR'] : ''; |
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36 | |||
37 | if (!empty($client_ip)) { |
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38 | $ip_expl = explode('.', $client_ip); |
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39 | $referer = explode('.', $remote_addr); |
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40 | if ($referer[0] != $ip_expl[0]) { |
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41 | $ip = array_reverse($ip_expl); |
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42 | $return = implode('.', $ip); |
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43 | } else { |
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44 | $return = $client_ip; |
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45 | } |
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46 | } else if (!empty($x_forwarded_for)) { |
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47 | if (strstr($x_forwarded_for, ',')) { |
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48 | $ip_expl = explode(',', $x_forwarded_for); |
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49 | $return = end($ip_expl); |
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50 | } else { |
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51 | $return = $x_forwarded_for; |
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52 | } |
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53 | } else { |
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54 | $return = $remote_addr; |
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55 | } |
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56 | unset ($client_ip, $x_forwarded_for, $remote_addr, $ip_expl); |
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57 | return $return; |
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2 | daniel-mar | 58 | } |