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The core module of Pcap4J.

There is a newer version: 2.0.0-alpha.6

/*_##########################################################################
  _##
  _##  Copyright (C) 2012 Pcap4J.org
  _##
  _##########################################################################
*/

package org.pcap4j.util;

import org.pcap4j.packet.Packet;

/**
 * @author Kaito Yamada
 * @since pcap4j 0.9.11
 */
public final class IcmpV4Helper {

  private IcmpV4Helper() { throw new AssertionError(); }

  /**
   *
   * @param packet an IPv4 Packet
   * @return a new Packet object.
   */
  public static Packet makePacketForInvokingPacketField(Packet packet) {
    if (
         packet == null
      || packet.getHeader() == null
      || packet.getPayload() == null
    ) {
      StringBuilder sb = new StringBuilder();
      sb.append("packet: ").append(packet)
        .append(" packet.getHeader(): ").append(packet.getHeader())
        .append(" packet.getPayload(): ").append(packet.getPayload());
      throw new NullPointerException(sb.toString());
    }

    return IcmpV6Helper.makePacketForInvokingPacketField(
             packet, 8 + packet.getHeader().length()
           );
  }

}