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 com.cloud.network;
  
  import static com.cloud.utils.AutoCloseableUtil.closeAutoCloseable;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.net.URLConnection;
  import java.util.Map;
  
  import javax.inject.Inject;
  import javax.naming.ConfigurationException;
  
  
  import org.apache.cloudstack.framework.config.dao.ConfigurationDao;
  
  import com.cloud.dc.dao.VlanDao;
  import com.cloud.network.dao.IPAddressDao;
  import com.cloud.utils.component.AdapterBase;
  import com.cloud.utils.exception.CloudRuntimeException;
  
  public class ExternalIpAddressAllocator extends AdapterBase implements IpAddrAllocator {
      @Inject
      ConfigurationDao _configDao = null;
      @Inject
      IPAddressDao _ipAddressDao = null;
      @Inject
      VlanDao _vlanDao;
      private boolean _isExternalIpAllocatorEnabled = false;
      private String _externalIpAllocatorUrl = null;
  
      @Override
      public IpAddr getPrivateIpAddress(String macAddr, long dcId, long podId) {
          if (_externalIpAllocatorUrl == null || _externalIpAllocatorUrl.equalsIgnoreCase("")) {
              return new IpAddr();
          }
          String urlString = _externalIpAllocatorUrl + "?command=getIpAddr&mac=" + macAddr + "&dc=" + dcId + "&pod=" + podId;
          logger.debug("getIP:" + urlString);
  
          BufferedReader in = null;
          try {
              URL url = new URL(urlString);
              URLConnection conn = url.openConnection();
              conn.setReadTimeout(30000);
  
              in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
              String inputLine;
              while ((inputLine = in.readLine()) != null) {
                  logger.debug(inputLine);
                  String[] tokens = inputLine.split(",");
                  if (tokens.length != 3) {
                      logger.debug("the return value should be: mac,netmask,gateway");
                      return new IpAddr();
                  }
                  return new IpAddr(tokens[0], tokens[1], tokens[2]);
              }
  
              return new IpAddr();
          } catch (MalformedURLException e) {
              throw new CloudRuntimeException("URL is malformed " + urlString, e);
          } catch (IOException e) {
              return new IpAddr();
          } finally {
              closeAutoCloseable(in, "closing buffered reader");
          }
  
      }
  
      @Override
      public IpAddr getPublicIpAddress(String macAddr, long dcId, long podId) {
          /*TODO: call API to get  ip address from external DHCP server*/
          return getPrivateIpAddress(macAddr, dcId, podId);
      }
  
      @Override
      public boolean releasePrivateIpAddress(String ip, long dcId, long podId) {
          /*TODO: call API to release the ip address from external DHCP server*/
          if (_externalIpAllocatorUrl == null || _externalIpAllocatorUrl.equalsIgnoreCase("")) {
              return false;
          }
  
          String urlString = _externalIpAllocatorUrl + "?command=releaseIpAddr&ip=" + ip + "&dc=" + dcId + "&pod=" + podId;
  
          logger.debug("releaseIP:" + urlString);
          BufferedReader in = null;
          try {
              URL url = new URL(urlString);
              URLConnection conn = url.openConnection();
              conn.setReadTimeout(30000);
  
              in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
  
              return true;
          } catch (MalformedURLException e) {
              throw new CloudRuntimeException("URL is malformed " + urlString, e);
          } catch (IOException e) {
              return false;
          } finally {
              closeAutoCloseable(in, "buffered reader close");
          }
      }
  
      @Override
      public boolean releasePublicIpAddress(String ip, long dcId, long podId) {
          /*TODO: call API to release the ip address from external DHCP server*/
          return releasePrivateIpAddress(ip, dcId, podId);
      }
  
      @Override
      public boolean externalIpAddressAllocatorEnabled() {
          return _isExternalIpAllocatorEnabled;
      }
  
      @Override
      public boolean configure(String name, Map<String, Object> params) throws ConfigurationException {
          _isExternalIpAllocatorEnabled = Boolean.parseBoolean(_configDao.getValue("direct.attach.network.externalIpAllocator.enabled"));
          _externalIpAllocatorUrl = _configDao.getValue("direct.attach.network.externalIpAllocator.url");
          _name = name;
  
          return true;
      }
  
      @Override
      public String getName() {
          return _name;
      }
  
      @Override
      public boolean start() {
          return true;
      }
  
      @Override
      public boolean stop() {
          return true;
      }
  }
  