DtDNS: Plugin 2
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DtDNS: Introduction | Crude Updater | WhatsMyIP | PHP cURL 1 | PHP cURL 2 | IP Tracker | Plugin 1 | Plugin 2
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| DtDNS and automatic update |
A Twist
While writing this tutorial it became apparent two functions were ideal candidates for adding to the core functionality.
The two functions now integrated provide additional diagnostics. A side effect concept of a plugin faded away and no longer made sense. Hence the DtDNS automatic IP updater is included as a standard component within the plugin's folder. It requires configuring and enabling for CRON operation.
This page details how to configure and enable CRON operation.
Script
The final script shown below:
UniServer\plugins\dtdns_updater\dtdns_updater.php
<?php
/*
###############################################################################
# Name: The Uniform Server DtDNS Updater v 1.0
# Developed By: The Uniform Server Development Team
# Modified Last By: Mike Gleaves (Ric)
# Web: http://www.uniformserver.com
###############################################################################
*/
//error_reporting(0); // Disable PHP errors and warnings
// Comment to Enable for testing
chdir(dirname(__FILE__)); // Change wd to this files location
include_once "../../unicon/main/includes/config.inc.php";
include_once "../../unicon/main/includes/functions.php";
run_location_tracker(); // Have servers moved if moved update configuration
print"\n";
//######################## User Configuration #################################
// Add as many lines as required with the following format:
// $id_pw[] = "hostname,password";
// For example:
// $id_pw[] = "books.effers.com,fred123";
// $id_pw[] = "power.dtdns.net,gun22powder";
//-----------------------------------------------------------------------------
$id_pw[] = "books.effers.com,fred123"; // Change
$id_pw[] = "books.effers.com,fred123"; // Change or delete
$id_pw[] = "books.effers.com,fred123"; // Change or delete
//###################### END User Configuration ###############################
$test = false; // Test true = display IP address and host names
// false = no display
foreach ($id_pw as $value) { // Iteratate through array
$idpw_array = explode(",",$value); // Split id pw pairs
if(get_ip_dns($idpw_array[0])){ // Was IP from DNS returned
if(get_ip_current()){ // Yes: Current IP returned
if($test){ // Test code
print "DNS IP = $ip_dns CURRENT IP = $ip_current $idpw_array[0]<br/>\n";
}
if($ip_dns != $ip_current){ // Are IP's different
dtdns_update($idpw_array[0],$idpw_array[1]);// yes: Update required
}
}
}
}// End foreach
//=== Get IP from DNS server ==================================================
// Input: ID = Hostname:
// Output: Return value true = IP was obtained
// Output: Return value false = IP not obtained or error
// Output: $ip_dns either IP address or host name
function get_ip_dns($hostname){
global $ip_dns; // IP address saved from DNS server
$ip_dns = gethostbyname($hostname); // Get IP address of hostname
if($ip_dns == $hostname){ // Is hostname returned (not IP address)
return false; // yes: failed to get IP address
}
else{ // no: IP obtained
return true; // set success
}
}
//============================================== END Get IP from DNS server ===
//=== DtDNS Host Update Page ==================================================
// Input: $id = Hostname:
// Input: $pw = User password
// Output: Return value true = sucess false = failed
function dtdns_update($id,$pw){
$id_val = urlencode($id); // User Host on DtDNS
$pw_val = urlencode($pw); // User password
$client_val = urlencode('UniServerV1'); // Optional - But added it
$url = 'https://www.dtdns.com/api/autodns.cfm'; // DtDNS update page
// Build complete URL
$str= $url."?id=".$id_val."&pw=".$pw_val."&client=".$client_val;
// Access page using Curl SSL
$ch=curl_init(); // Initialize Curl get handle
curl_setopt($ch,CURLOPT_URL,$str); // Set Curl URL option
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // no verify
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,10); // timeout set to 10 sceonds
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); // curl_exec ouputs a string
$buffer = curl_exec($ch); // run above, save to buffer
curl_close($ch); // Close Curl frees memory
// Test returned page
if(preg_match("/now\spoints\sto/",$buffer)){// Is returne value "now points to"
return true; // yes: update OK
}
else{ // no: Failed
return false;
}
}
//============================================== END DtDNS Host Update Page ===
?>
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Manual Update
You can run this batch file to manually force an update, remember to leave around ten minuets before performing another update.
The final batch script shown below:
UniServer\plugins\dtdns_updater\Run_dtdns_updater.bat
COLOR B0 @echo off cls rem ### working directory current folder pushd %~dp0 ..\..\usr\local\php\php.exe dtdns_updater.php rem ### restore original working directory pause popd EXIT
Cron
Cron provides a periodic tick Uniform Server's default is every ten minutes.
DtDNS automatic updater has been pre-configured however it is disabled by default.
To enable Cron edit file UniServer\unicon\main\run_cron.php
Locate these two line in section List of scripts to be run
// $cmd = 'start ..\..\usr\local\php\php-win.exe ..\..\plugins\dtdns_updater\dtdns_updater.php'; // pclose(popen($cmd,'r')); // Start detatched process
and uncomment as shown below
$cmd = 'start ..\..\usr\local\php\php-win.exe ..\..\plugins\dtdns_updater\dtdns_updater.php'; pclose(popen($cmd,'r')); // Start detatched process
Notes:
- When the server is first started Cron is run and the IP addreess updated if different
- Every ten minuets Cron is run and the IP address are checked if different are updated.
- Cron only runs when the servers are running however you can force an update using the batch file mentioned above.
Summary
Interesting twist to this tutorial started life as a plugin only to become an integrated component.
Thought I would leave the tutorial as is it contains useful information should you want to design an IP updater for another provider.