From 560be744124308080677e556af6c6a8e27875c67 Mon Sep 17 00:00:00 2001
From: Felix Kretschmer <felixkretschmer@users.noreply.github.com>
Date: Thu, 21 Jun 2018 02:15:32 +0200
Subject: [PATCH] Update update.php

Added domain support
Store content to data.js
Multi-tenant planned to support multiple domains
Broadcast to DNS API planned
---
 update.php | 35 ++++++++++++++++++++++++++---------
 1 file changed, 26 insertions(+), 9 deletions(-)

diff --git a/update.php b/update.php
index 4526ff0..e487a5c 100644
--- a/update.php
+++ b/update.php
@@ -4,6 +4,7 @@
  * https://github.com/mattes/
  *
  * Copyright 2012 Matthias Kadenbach
+ * Update 2018 Felix Kretschmer
  * Released under the MIT license
  *
  * Examples:
@@ -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
@@ -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
@@ -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"]) ? $_GET["ip6addr"] : null), FILTER_VALIDATE_IP, FILTER_FLAG_IPV6);
@@ -121,21 +125,32 @@ function send_status_and_exit($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, $html)) send_status_and_exit(500, "911 server is unable to create ip html page");
 }
@@ -143,8 +158,10 @@ function send_status_and_exit($code, $text) {
 // 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);
\ No newline at end of file
+if(ipv(6)) send_status_and_exit(200, "good " . $ip6addr);