public static boolean isAllowed(Connection connection) {
if (!allowedIPs.isEmpty()) {
// The server is using a whitelist so check that the IP address of the client
// is authorized to connect to the server
boolean forbidAccess = false;
try {
if (!allowedIPs.containsKey(connection.getHostAddress())) {
byte[] address = connection.getAddress();
String range1 =
(address[0] & 0xff) + "." + (address[1] & 0xff) + "." + (address[2] & 0xff) + ".*";
String range2 = (address[0] & 0xff) + "." + (address[1] & 0xff) + ".*.*";
String range3 = (address[0] & 0xff) + ".*.*.*";
if (!allowedIPs.containsKey(range1)
&& !allowedIPs.containsKey(range2)
&& !allowedIPs.containsKey(range3)) {
forbidAccess = true;
}
}
} catch (UnknownHostException e) {
forbidAccess = true;
}
return !forbidAccess;
}
return true;
}
/**
* Creates a new client session that was established to the specified connection manager. The new
* session will not be findable through its stream ID.
*
* @param connectionManagerDomain the connection manager that is handling the connection of the
* session.
* @param streamID the stream ID created by the connection manager for the new session.
* @param hostName the address's hostname of the client or null if using old connection manager.
* @param hostAddress the textual representation of the address of the client or null if using old
* CM.
* @return true if a session was created or false if the client should disconnect.
*/
public boolean createClientSession(
String connectionManagerDomain, String streamID, String hostName, String hostAddress) {
Connection connection =
new ClientSessionConnection(connectionManagerDomain, hostName, hostAddress);
// Check if client is allowed to connect from the specified IP address. Ignore the checking if
// connection
// manager is old version and is not passing client's address
byte[] address = null;
try {
address = connection.getAddress();
} catch (UnknownHostException e) {
// Ignore
}
if (address == null || LocalClientSession.isAllowed(connection)) {
LocalClientSession session =
SessionManager.getInstance().createClientSession(connection, new BasicStreamID(streamID));
// Register that this streamID belongs to the specified connection manager
streamIDs.put(streamID, connectionManagerDomain);
// Register which sessions are being hosted by the speicifed connection manager
Map<String, LocalClientSession> sessions = sessionsByManager.get(connectionManagerDomain);
if (sessions == null) {
synchronized (connectionManagerDomain.intern()) {
sessions = sessionsByManager.get(connectionManagerDomain);
if (sessions == null) {
sessions = new ConcurrentHashMap<>();
sessionsByManager.put(connectionManagerDomain, sessions);
}
}
}
sessions.put(streamID, session);
return true;
}
return false;
}