content: /*
   * Copyright (c) 2011, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * 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, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj.protocol;
  
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  import java.net.UnknownHostException;
  
  import com.mysql.cj.Messages;
  import com.mysql.cj.Session;
  
  public interface SocketMetadata {
  
      default boolean isLocallyConnected(Session sess) {
          String processHost = sess.getProcessHost();
          return isLocallyConnected(sess, processHost);
      }
  
      default boolean isLocallyConnected(Session sess, String processHost) {
          if (processHost != null) {
              sess.getLog().logDebug(Messages.getString("SocketMetadata.0", new Object[] { processHost }));
  
              int endIndex = processHost.lastIndexOf(":");
              if (endIndex != -1) {
                  processHost = processHost.substring(0, endIndex);
              }
  
              try {
  
                  InetAddress[] whereMysqlThinksIConnectedFrom = InetAddress.getAllByName(processHost);
  
                  SocketAddress remoteSocketAddr = sess.getRemoteSocketAddress();
  
                  if (remoteSocketAddr instanceof InetSocketAddress) {
                      InetAddress whereIConnectedTo = ((InetSocketAddress) remoteSocketAddr).getAddress();
  
                      for (InetAddress hostAddr : whereMysqlThinksIConnectedFrom) {
                          if (hostAddr.equals(whereIConnectedTo)) {
                              sess.getLog().logDebug(Messages.getString("SocketMetadata.1", new Object[] { hostAddr, whereIConnectedTo }));
                              return true;
                          }
                          sess.getLog().logDebug(Messages.getString("SocketMetadata.2", new Object[] { hostAddr, whereIConnectedTo }));
                      }
  
                  } else {
                      sess.getLog().logDebug(Messages.getString("SocketMetadata.3", new Object[] { remoteSocketAddr }));
                  }
  
                  return false;
              } catch (UnknownHostException e) {
                  sess.getLog().logWarn(Messages.getString("Connection.CantDetectLocalConnect", new Object[] { processHost }), e);
  
                  return false;
              }
  
          }
  
          return false;
      }
  
  }
  