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The core module of Pcap4J.
There is a newer version: 2.0.0-alpha.6
/*_##########################################################################
  _##
  _##  Copyright (C) 2011-2013  Pcap4J.org
  _##
  _##########################################################################
*/

package org.pcap4j.packet;

import org.pcap4j.util.PropertiesLoader;

/**
 * @author Kaito Yamada
 * @since pcap4j 0.9.1
 */
public final class PacketPropertiesLoader {

  /**
   *
   */
  public static final String PACKET_PROPERTIES_PATH_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".properties";

  /**
   *
   */
  public static final String ICMPV4_CALC_CHECKSUM_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".icmpV4.calcChecksumAtBuild";

  /**
   *
   */
  public static final String ICMPV6_CALC_CHECKSUM_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".icmpV6.calcChecksumAtBuild";

  /**
   *
   */
  public static final String IPV4_CALC_CHECKSUM_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".ipV4.calcChecksumAtBuild";

  /**
   *
   */
  public static final String TCPV4_CALC_CHECKSUM_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".tcpV4.calcChecksumAtBuild";

  /**
   *
   */
  public static final String TCPV6_CALC_CHECKSUM_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".tcpV6.calcChecksumAtBuild";

  /**
   *
   */
  public static final String UDPV4_CALC_CHECKSUM_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".udpV4.calcChecksumAtBuild";

  /**
   *
   */
  public static final String UDPV6_CALC_CHECKSUM_KEY
    = PacketPropertiesLoader.class.getPackage().getName()
        + ".udpV6.calcChecksumAtBuild";

  private static final PacketPropertiesLoader INSTANCE
    = new PacketPropertiesLoader();

  private PropertiesLoader loader
    = new PropertiesLoader(
        System.getProperty(
          PACKET_PROPERTIES_PATH_KEY,
          PacketPropertiesLoader.class.getPackage().getName()
            .replace('.', '/') + "/packet.properties"
        ),
        true,
        true
      );

  private PacketPropertiesLoader() {}

  /**
   *
   * @return the singleton instance of PacketPropertiesLoader.
   */
  public static PacketPropertiesLoader getInstance() {
    return INSTANCE;
  }

  /**
   *
   * @return a value of the property.
   */
  public boolean icmpV4CalcChecksum() {
    return loader.getBoolean(
             ICMPV4_CALC_CHECKSUM_KEY,
             Boolean.FALSE
           ).booleanValue();
  }

  /**
   *
   * @return a value of the property.
   */
  public boolean icmpV6CalcChecksum() {
    return loader.getBoolean(
             ICMPV6_CALC_CHECKSUM_KEY,
             Boolean.FALSE
           ).booleanValue();
  }

  /**
   *
   * @return a value of the property.
   */
  public boolean ipV4CalcChecksum() {
    return loader.getBoolean(
             IPV4_CALC_CHECKSUM_KEY,
             Boolean.FALSE
           ).booleanValue();
  }

  /**
   *
   * @return a value of the property.
   */
  public boolean tcpV4CalcChecksum() {
    return loader.getBoolean(
             TCPV4_CALC_CHECKSUM_KEY,
             Boolean.FALSE
           ).booleanValue();
  }

  /**
   *
   * @return a value of the property.
   */
  public boolean tcpV6CalcChecksum() {
    return loader.getBoolean(
             TCPV6_CALC_CHECKSUM_KEY,
             Boolean.FALSE
           ).booleanValue();
  }

  /**
   *
   * @return a value of the property.
   */
  public boolean udpV4CalcChecksum() {
    return loader.getBoolean(
             UDPV4_CALC_CHECKSUM_KEY,
             Boolean.FALSE
           ).booleanValue();
  }

  /**
   *
   * @return a value of the property.
   */
  public boolean udpV6CalcChecksum() {
    return loader.getBoolean(
             UDPV6_CALC_CHECKSUM_KEY,
             Boolean.FALSE
           ).booleanValue();
  }

}