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Update update.php #2

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Update update.php #2

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35 changes: 26 additions & 9 deletions update.php
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
* https://github.com/mattes/
*
* Copyright 2012 Matthias Kadenbach
* Update 2018 Felix Kretschmer
* Released under the MIT license
*
* Examples:
Expand Down Expand Up @@ -42,10 +43,10 @@
define("IP_HTML_PAGE", ROOT . "ip.html");

// set an username
define("USERNAME", "aladin");
define("USERNAME", "dyndns");

// set a secure password
define("PASSWORD", "magic");
define("PASSWORD", "magicKey");

// lock user after number of failed login attempts
// if user got locked empty data.json manually
Expand Down Expand Up @@ -87,7 +88,7 @@ function send_status_and_exit($code, $text) {
// load and restore values from data file
$data = json_decode(@file_get_contents(DATA_FILE_PATH), true);
if(!$data) {
$data = array("current_ip4addr" => null, "current_ip6addr" => null, "last_update_timestamp" => null, "failed_logins" => 0);
$data = array("domain" => null, "current_ip4addr" => null, "current_ip6addr" => null, "last_update_timestamp" => null, "failed_logins" => 0);
}

// check failed logins and if username or password are not correct
Expand All @@ -108,7 +109,10 @@ function send_status_and_exit($code, $text) {
$_GET["ip4addr"] = "0.0.0.0";
$_GET["ip6addr"] = "0:0:0:0:0:0:0:0";
}


// get the domain
$domain = $_GET["domain"];

// get ip4 and ip6 address
$ip4addr = filter_var((!empty($_GET["ip4addr"]) ? $_GET["ip4addr"] : null), FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
$ip6addr = filter_var((!empty($_GET["ip6addr"]) ? $_GET["ip6addr"] : null), FILTER_VALIDATE_IP, FILTER_FLAG_IPV6);
Expand All @@ -121,30 +125,43 @@ function send_status_and_exit($code, $text) {
if($ip4addr == $data["current_ip4addr"] && ipv(4)) send_status_and_exit(200, "nochg " . $ip4addr);
if($ip6addr == $data["current_ip6addr"] && ipv(6)) send_status_and_exit(200, "nochg " . $ip6addr);

// fritzbox sends $_GET["domain"], too. ignore it.

// write changes to data file
$data["last_update_timestamp"] = time();
$data["current_ip4addr"] = $ip4addr;
$data["current_ip6addr"] = $ip6addr;
$data["domain"] = $domain;

if(!@file_put_contents(DATA_FILE_PATH, json_encode($data))) send_status_and_exit(500, "911 server is unable to write data file");

// create ip html page
if(IP_HTML_PAGE) {
$html = @file_get_contents(ROOT . "ip.template.html");
if($html === false) send_status_and_exit(500, "911 server is unable to read ip.template.html");

$html = str_replace(array("%DOMAIN%"), array($domain), $html);
$html = str_replace(array("%TIME%"), array(date("Y-m-d H:i:s",$data["last_update_timestamp"])), $html);

if(ipv(4)) $html = str_replace(array("%IP%"), array($ip4addr), $html);
if(ipv(6)) $html = str_replace(array("%IP%"), array($ip6addr), $html);
if(ipv(4)) {
$html = str_replace(array("%IPv4%"), array($ip4addr), $html);
} else {
$html = str_replace(array("%IPv4%"), array("no IPv4"), $html);
}
if(ipv(6)) {
$html = str_replace(array("%IPv6%"), array($ip6addr), $html);
} else {
$html = str_replace(array("%IPv6%"), array("no IPv6"), $html);
}

if(!@file_put_contents(IP_HTML_PAGE, $html)) send_status_and_exit(500, "911 server is unable to create ip html page");
}

// ready to broadcast the ip somewhere else ...

// @todo
// multi-tenant
// fix v6 support


// success!
if(ipv(4)) send_status_and_exit(200, "good " . $ip4addr);
if(ipv(6)) send_status_and_exit(200, "good " . $ip6addr);
if(ipv(6)) send_status_and_exit(200, "good " . $ip6addr);