+ // 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;