* @version 0.0.0
* @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 Core Developer Team
* @license GNU GPL 3.0 or any newer version
* @link http://www.ship-simu.org
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
class ConsoleTools extends BaseFrameworkSystem {
/**
* Protected constructor
*
* @return void
*/
protected function __construct () {
// Call parent constructor
parent::__construct(__CLASS__);
}
/**
* Tries to resolve an IP address from given hostname. Currently only IPv
* addresses are resolved.
*
* @param $hostname Host name we shall resolve
* @return $ip IP address resolved from host name
* @todo We should connect this to a caching class to cache DNS requests
*/
protected function resolveIpAddress ($hostname) {
// Debug message
$this->debugOutput(sprintf("[%s:] Our host name is: %s",
$this->__toString(),
$hostname
));
// Default is an invalid one
$ip = '0.0.0.0';
// Resolve it
// @TODO Here should the cacher be implemented
$ipResolved = gethostbyname($hostname);
// Was it fine?
if (($ipResolved !== false) && ($ipResolved != $hostname)) {
// Okay, this works!
$ip = $ipResolved;
// Debug message
$this->debugOutput(sprintf("[%s:] Resolved IP address is: %s\n",
$this->__toString(),
$ip
));
} else {
// Problem while resolving IP address
$this->debugOutput(sprintf("[%s:] Problem resolving IP address for host %s. Please check your /etc/hosts file.",
$this->__toString(),
$hostname
));
}
// Return resolved IP
return $ip;
}
/**
* Aquires the IP address of this host by reading the /etc/hostname file
* and solving it. It is now stored in configuration
*
* @return void
*/
public static function acquireSelfIPAddress () {
// Local IP by default
$ip = '127.0.0.1';
// Get a new instance
$helper = new ConsoleTools();
try {
// Get a file pointer
$io = FrameworkFileInputPointer::createFrameworkFileInputPointer('/etc/hostname');
// Read the file
$hostname = trim($io->readFromFile());
// Close the file
$io->closeFile();
// Resolve the IP number
$ip = $helper->resolveIpAddress($hostname);
} catch (FileNotFoundException $e) {
// Fall-back to 'SESSION_SVR' which found on my Sun Station
if (isset($_SERVER['SESSION_SVR'])) {
// Resolve it
$ip = $helper->resolveIpAddress($_SERVER['SESSION_SVR']);
} else {
// Could not find our hostname
$helper->debugOutput(sprintf("[%s:] WARNING: Cannot resolve my own IP address.",
$helper->__toString()
));
}
} catch (FrameworkException $e) {
// Output debug message
$helper->debugOutput(sprintf("[%s:] Problem while resolving own IP address: [%s|%s]:%s",
$helper->__toString(),
$e->__toString(),
$e->getHexCode(),
$e->getMessage()
));
}
// Set it in configuration
FrameworkConfiguration::getInstance()->setServerAddress($ip);
}
/**
* Determines own remote IP address (e.g. can be used to probe if we are
* reachable from outside by determining external IP and then connect to it.
* This is accomblished by connecting to the IP of www.ship-simu.org which
* should default to 217.172.186.31.
*
* This method is taken and lightly rewritten from a user comment on php.net:
* http://de.php.net/manual/en/function.socket-create.php#49368
*
* @param $dest IP destination we should connect to
* @param $port Port destination we should connect to
* @return $externalAddress The determined external IP address
* @throws InvalidSocketException If socket initialization wents wrong
*/
public function determineExternalIp ($dest = '217.172.186.31', $port = 80) {
// First get a socket
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
if (!is_resource($socket)) {
// Throw InvalidSocketException
throw new InvalidSocketException (array($this, gettype($socket), 0, 'unknown'));
} // END - if
// Connect to the destination
socket_connect($socket, $dest, $port);
// Get the socket address (our external IP) and port (ignored)
socket_getsockname($socket, $externalAddress, $ourPort);
// Close the socket
socket_close($socket);
// Return determined external IP
return $externalAddress;
}
}
// [EOF]
?>