*
* @author Roland Haeder <webmaster@ship-simu.org>
* @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 Core Developer Team
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Core Developer Team
* @license GNU GPL 3.0 or any newer version
* @link http://www.ship-simu.org
*
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class ConsoleTools extends BaseFrameworkSystem {
+ // Constants
+ const HTTP_EOL = "\r\n";
+ const HTTP_USER_AGENT = 'ConsoleTools/1.0';
+
/**
* Protected constructor
*
*
* @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: <span class=\"data\">%s</span>",
+ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:] Host name to resolve is: %s',
$this->__toString(),
$hostname
));
$ip = '0.0.0.0';
// Resolve it
+ // @TODO Here should the cacher be implemented
$ipResolved = gethostbyname($hostname);
// Was it fine?
$ip = $ipResolved;
// Debug message
- $this->debugOutput(sprintf("[%s:] Resolved IP address is: <span class=\"data\">%s</span>\n",
+ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:] Resolved IP address is: %s',
$this->__toString(),
$ip
));
- } // END - if
+ } else {
+ // Problem while resolving IP address
+ self::createDebugInstance(__CLASS__)->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
+ * Checks wether proxy configuration is used
+ *
+ * @return $isUsed Wether proxy is used
+ */
+ protected function isProxyUsed () {
+ // Do we have cache?
+ if (!isset($GLOBALS[__METHOD__])) {
+ // Determine it
+ $GLOBALS[__METHOD__] = (($this->getConfigInstance()->getConfigEntry('proxy_host') != '') && ($this->getConfigInstance()->getConfigEntry('proxy_port') > 0));
+ } // END - if
+
+ // Return cache
+ return $GLOBALS[__METHOD__];
+ }
+
+ /**
+ * Sets up a proxy tunnel for given hostname and through resource
*
- * @return $ip The resolved IP address
+ * @param $host Host to connect to
+ * @param $port Port number to connect to
+ * @param $socketResource Resource of a socket
+ * @return $response Response array
+ */
+ protected function setupProxyTunnel ($host, $port, $socketResource) {
+ // Initialize array
+ $response = array('', '', '');
+ $proxyTunnel = '';
+
+ // Generate CONNECT request header
+ $proxyTunnel .= 'CONNECT ' . $host . ':' . $port . ' HTTP/1.1' . self::HTTP_EOL;
+ $proxyTunnel .= 'Host: ' . $host . ':' . $port . self::HTTP_EOL;
+ $proxyTunnel .= 'Proxy-Connection: Keep-Alive' . self::HTTP_EOL;
+
+ // Use login data to proxy? (username at least!)
+ if ($this->getConfigInstance()->getConfigEntry('proxy_username') != '') {
+ // Add it as well
+ $encodedAuth = base64_encode($this->getConfigInstance()->getConfigEntry('proxy_username') . ':' . $this->getConfigInstance()->getConfigEntry('proxy_password'));
+ $proxyTunnel .= 'Proxy-Authorization: Basic ' . $encodedAuth . self::HTTP_EOL;
+ } // END - if
+
+ // Add last new-line
+ $proxyTunnel .= self::HTTP_EOL;
+ //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONSOLE-TOOLS: proxyTunnel=' . $proxyTunnel);
+
+ // Write request
+ fwrite($socketResource, $proxyTunnel);
+
+ // Got response?
+ if (feof($socketResource)) {
+ // No response received
+ return $response;
+ } // END - if
+
+ // Read the first line
+ $resp = trim(fgets($socketResource, 10240));
+ $respArray = explode(' ', $resp);
+ if (((strtolower($respArray[0]) !== 'http/1.0') && (strtolower($respArray[0]) !== 'http/1.1')) || ($respArray[1] != '200')) {
+ // Invalid response!
+ return $response;
+ } // END - if
+
+ // All fine!
+ return $respArray;
+ }
+
+ /**
+ * Aquires the IP address of this host by reading the /etc/hostname file
+ * and solving it. It is now stored in configuration
+ *
+ * @return $ip Aquired IP address
*/
public static function acquireSelfIPAddress () {
// Local IP by default
$ip = '127.0.0.1';
// Get a new instance
- $helper = new ConsoleTools();
+ $helperInstance = new ConsoleTools();
try {
// Get a file pointer
- $io = FrameworkFileInputPointer::createFrameworkFileInputPointer('/etc/hostname');
+ $io = FrameworkFileInputPointer::createFrameworkFileInputPointer($helperInstance->getConfigInstance()->getConfigEntry('hostname_file'));
// Read the file
$hostname = trim($io->readFromFile());
$io->closeFile();
// Resolve the IP number
- $ip = $helper->resolveIpAddress($hostname);
- } catch (FileNotFoundException $e) {
+ $ip = $helperInstance->resolveIpAddress($hostname);
+ } catch (FileIoException $e) {
// Fall-back to 'SESSION_SVR' which found on my Sun Station
if (isset($_SERVER['SESSION_SVR'])) {
// Resolve it
- $ip = $helper->resolveIpAddress($_SERVER['SESSION_SVR']);
+ $ip = $helperInstance->resolveIpAddress($_SERVER['SESSION_SVR']);
+ } elseif (isset($_SERVER['COMPUTERNAME'])) {
+ // May happen on some XP systems, so also try this
+ $ip = $helperInstance->resolveIpAddress($_SERVER['COMPUTERNAME']);
} else {
// Could not find our hostname
- $helper->debugOutput(sprintf("[%s:] WARNING: Cannot resolve my own IP address.",
- $helper->__toString()
+ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:] WARNING: Cannot resolve my own IP address.',
+ $helperInstance->__toString()
));
}
} catch (FrameworkException $e) {
// Output debug message
- $helper->debugOutput(sprintf("[%s:] Problem while resolving own IP address: [%s|%s]:%s",
- $helper->__toString(),
+ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:] Problem while resolving own IP address: [%s|%s]:%s',
+ $helperInstance->__toString(),
$e->__toString(),
$e->getHexCode(),
$e->getMessage()
));
}
- // Return the IP address
+ // Set it in configuration
+ FrameworkConfiguration::getSelfInstance()->setServerAddress($ip);
+
+ // Return it
return $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.
+ * should default to 188.138.90.169 and requesting /ip.php which does only
+ * return the content of $_SERVER['REMOTE_ADDR']. Of course, this method
+ * requires a working Internet connection.
*
- * This method is taken and lightly rewritten from a user comment on php.net:
+ * This method is taken from a user comment on php.net and heavily rewritten.
+ * Compare to following link:
* 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 $externalAddress The determined external IP address
- * @throws InvalidSocketException If socket initialization wents wrong
+ * @throws InvalidSocketException If socket initialization wents wrong or if an errors occurs
+ * @todo This should be moved out to an external class, e.g. HttpClient
+ * @todo Make IP, host name, port and script name configurable
*/
- public function determineExternalIp ($dest = '217.172.186.31', $port = 80) {
+ public static function determineExternalIp () {
+ // Get helper instance
+ $helperInstance = new ConsoleTools();
+
// 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'));
+ // @TODO Add some DNS caching here
+
+ // Open connection
+ if ($helperInstance->isProxyUsed() === true) {
+ // Resolve hostname into IP address
+ $ip = $helperInstance->resolveIpAddress($helperInstance->getConfigInstance()->getConfigEntry('proxy_host'));
+
+ // Connect to host through proxy connection
+ $socketResource = fsockopen($ip, $helperInstance->getConfigInstance()->getConfigEntry('proxy_port'), $errorNo, $errorStr, 30);
+ } else {
+ // Connect to host directly
+ $socketResource = fsockopen('188.138.90.169', 80, $errorNo, $errorStr, 30);
+ }
+
+ // Check if there was an error else
+ if ($errorNo > 0) {
+ // Then throw again
+ throw new InvalidSocketException(array($helperInstance, $socketResource, $errorNo, $errorStr), BaseListener::EXCEPTION_INVALID_SOCKET);
+ } // END - if
+
+ // Prepare the GET request
+ $request = 'GET ' . ($helperInstance->isProxyUsed() === true ? 'http://ship-simu.org' : '') . '/ip.php HTTP/1.0' . self::HTTP_EOL;
+ $request .= 'Host: ship-simu.org' . self::HTTP_EOL;
+ $request .= 'User-Agent: ' . self::HTTP_USER_AGENT . self::HTTP_EOL;
+ $request .= 'Connection: close' . self::HTTP_EOL;
+
+ // Do we use proxy?
+ if ($helperInstance->isProxyUsed() === true) {
+ // CONNECT method?
+ if ($helperInstance->getConfigInstance()->getConfigEntry('proxy_connect_method') == 'Y') {
+ // Setup proxy tunnel
+ $response = $helperInstance->setupProxyTunnel('ship-simu.org', 80, $socketResource);
+
+ // If the response is invalid, abort
+ if ((count($response) == 3) && (empty($response[0])) && (empty($response[1])) && (empty($response[2]))) {
+ // Invalid response!
+ $helperInstance->debugBackTrace('Proxy tunnel not working: response=' . print_r($response, true));
+ } // END - if
+ } else {
+ // Add header for proxy
+ $request .= 'Proxy-Connection: Keep-Alive' . self::HTTP_EOL;
+ }
} // END - if
- // Connect to the destination
- socket_connect($socket, $dest, $port);
+ // Add last HTTP_EOL
+ $request .= self::HTTP_EOL;
- // Get the socket address (our external IP) and port (ignored)
- socket_getsockname($socket, $externalAddress, $ourPort);
+ // Send it to the socket
+ fwrite($socketResource, $request);
- // Close the socket
- socket_close($socket);
+ // Init IP (this will always be the last line)
+ $externalAddress = 'invalid';
+
+ // And read the reply
+ while (!feof($socketResource)) {
+ // Get line
+ $externalAddress = trim(fgets($socketResource, 128));
+
+ // Detect HTTP response
+ if ((substr($externalAddress, 0, 7) == 'HTTP/1.') && (substr($externalAddress, -6, 6) != '200 OK')) {
+ // Stop processing
+ break;
+ } // END - if
+ } // END - while
+
+ // Close socket
+ fclose($socketResource);
+
+
+ // Debug message
+ /* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONSOLE-TOOLS: Resolved external address: ' . $externalAddress);
// Return determined external IP
return $externalAddress;
}
+
+ /**
+ * Analyzes the 'environment', mostly $_SERVER, for presence of elements
+ * which indicates clearly that e.g. this script has been executed from
+ * console or web.
+ *
+ * @return $type The analyzed type, can be 'http' or 'console'
+ */
+ public static function analyzeEnvironmentForType () {
+ // Default is the console
+ $type = 'console';
+
+ // Now, do we have a request method, or query string set?
+ if ((isset($_SERVER['REQUEST_METHOD'])) || (isset($_SERVER['QUERY_STRING']))) {
+ // Possibly HTTP request
+ $type = 'http';
+ } // END - if
+
+ // Return it
+ return $type;
+ }
+
+ /**
+ * Analyzes the 'environment', mostly $_SERVER, for presence of elements
+ * which indicates clearly that e.g. this script has been executed from
+ * console or web. This method should be used for class names, they
+ * currently are named differently. Here is a list to clarify this:
+ *
+ * Request type | Class type
+ * -----------------------------
+ * http | web
+ * console | console
+ *
+ * @return $type The analyzed type, can be 'http' or 'console'
+ */
+ public static function analyzeEnvironmentForClassType () {
+ // Default is the console
+ $type = 'console';
+
+ // Now, do we have a request method, or query string set?
+ if ((isset($_SERVER['REQUEST_METHOD'])) || (isset($_SERVER['QUERY_STRING']))) {
+ // Possibly HTTP request
+ $type = 'web';
+ } // END - if
+
+ // Return it
+ return $type;
+ }
}
// [EOF]
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