content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.hive.service.auth;
  
  import org.apache.hive.service.cli.thrift.TCLIService;
  import org.apache.hive.service.cli.thrift.TCLIService.Iface;
  import org.apache.thrift.TException;
  import org.apache.thrift.protocol.TProtocol;
  import org.apache.thrift.transport.TSaslClientTransport;
  import org.apache.thrift.transport.TSaslServerTransport;
  import org.apache.thrift.transport.TSocket;
  import org.apache.thrift.transport.TTransport;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * This class is responsible for setting the ipAddress for operations executed via HiveServer2.
   * <p>
   * <ul>
   * <li>IP address is only set for operations that calls listeners with hookContext</li>
   * <li>IP address is only set if the underlying transport mechanism is socket</li>
   * </ul>
   * </p>
   *
   * @see org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext
   */
  public class TSetIpAddressProcessor<I extends Iface> extends TCLIService.Processor<Iface> {
  
    private static final Logger LOGGER = LoggerFactory.getLogger(TSetIpAddressProcessor.class.getName());
  
    public TSetIpAddressProcessor(Iface iface) {
      super(iface);
    }
  
    @Override
    public boolean process(final TProtocol in, final TProtocol out) throws TException {
      setIpAddress(in);
      setUserName(in);
      try {
        return super.process(in, out);
      } finally {
        THREAD_LOCAL_USER_NAME.remove();
        THREAD_LOCAL_IP_ADDRESS.remove();
      }
    }
  
    private void setUserName(final TProtocol in) {
      TTransport transport = in.getTransport();
      if (transport instanceof TSaslServerTransport) {
        String userName = ((TSaslServerTransport) transport).getSaslServer().getAuthorizationID();
        THREAD_LOCAL_USER_NAME.set(userName);
      }
    }
  
    protected void setIpAddress(final TProtocol in) {
      TTransport transport = in.getTransport();
      TSocket tSocket = getUnderlyingSocketFromTransport(transport);
      if (tSocket == null) {
        LOGGER.warn("Unknown Transport, cannot determine ipAddress");
      } else {
        THREAD_LOCAL_IP_ADDRESS.set(tSocket.getSocket().getInetAddress().getHostAddress());
      }
    }
  
    private TSocket getUnderlyingSocketFromTransport(TTransport transport) {
      while (transport != null) {
        if (transport instanceof TSaslServerTransport) {
          transport = ((TSaslServerTransport) transport).getUnderlyingTransport();
        }
        if (transport instanceof TSaslClientTransport) {
          transport = ((TSaslClientTransport) transport).getUnderlyingTransport();
        }
        if (transport instanceof TSocket) {
          return (TSocket) transport;
        }
      }
      return null;
    }
  
    private static final ThreadLocal<String> THREAD_LOCAL_IP_ADDRESS = new ThreadLocal<String>() {
      @Override
      protected synchronized String initialValue() {
        return null;
      }
    };
  
    private static final ThreadLocal<String> THREAD_LOCAL_USER_NAME = new ThreadLocal<String>() {
      @Override
      protected synchronized String initialValue() {
        return null;
      }
    };
  
    public static String getUserIpAddress() {
      return THREAD_LOCAL_IP_ADDRESS.get();
    }
  
    public static String getUserName() {
      return THREAD_LOCAL_USER_NAME.get();
    }
  }
  