pcap.codec.DataLinkLayer Maven / Gradle / Ivy
/** This code is licenced under the GPL version 2. */
package pcap.codec;
import java.util.HashMap;
import java.util.Map;
import pcap.common.annotation.Inclubating;
import pcap.common.memory.Memory;
import pcap.common.util.NamedNumber;
/** @author Ardika Rommy Sanjaya */
@Inclubating
public final class DataLinkLayer extends NamedNumber {
private static final Map REGISTRY = new HashMap<>();
private static final Map BUILDER = new HashMap<>();
/** Ethernet (10Mb, 100Mb, 1000Mb, and up): 1 */
public static final DataLinkLayer EN10MB = new DataLinkLayer((short) 1, "Ethernet");
public DataLinkLayer(int value, String name) {
super((short) value, name);
}
public Packet newInstance(Memory buffer) {
AbstractPacket.Builder packetBuilder = BUILDER.get(this.value());
if (packetBuilder == null) {
if (buffer == null || buffer.capacity() <= 0) {
return null;
}
return new UnknownPacket.Builder().build(buffer);
}
return packetBuilder.build(buffer);
}
/**
* @param value value.
* @return returns {@link DataLinkLayer} object.
*/
public static DataLinkLayer valueOf(short value) {
for (Map.Entry entry : REGISTRY.entrySet()) {
if (entry.getValue() == value) {
return entry.getKey();
}
}
return new DataLinkLayer((short) -1, "Unknown");
}
/**
* @param dataLinkLayer data link type.
* @param packetBuilder packet builder.
*/
public static synchronized void register(
DataLinkLayer dataLinkLayer, AbstractPacket.Builder packetBuilder) {
BUILDER.put(dataLinkLayer.value(), packetBuilder);
REGISTRY.put(dataLinkLayer, dataLinkLayer.value());
}
}
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