javax.jmdns.impl.constants.DNSOptionCode Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jmdns Show documentation

JmDNS is a Java implementation of multi-cast DNS and can be used for service registration and discovery in local area networks. JmDNS is fully compatible with Apple's Bonjour. The project was originally started in December 2002 by Arthur van Hoff at Strangeberry. In November 2003 the project was moved to SourceForge, and the name was changed from JRendezvous to JmDNS for legal reasons. Many thanks to Stuart Cheshire for help and moral support.

The newest version!

/**
 *
 */
package javax.jmdns.impl.constants;

/**
 * DNS option code.
 * 
 * @author Arthur van Hoff, Pierre Frisch, Rick Blair
 */
public enum DNSOptionCode {

    /**
     * Token
     */
    Unknown("Unknown", 65535),
    /**
     * Long-Lived Queries Option [http://files.dns-sd.org/draft-sekar-dns-llq.txt]
     */
    LLQ("LLQ", 1),
    /**
     * Update Leases Option [http://files.dns-sd.org/draft-sekar-dns-ul.txt]
     */
    UL("UL", 2),
    /**
     * Name Server Identifier Option [RFC5001]
     */
    NSID("NSID", 3),
    /**
     * Owner Option [draft-cheshire-edns0-owner-option]
     */
    Owner("Owner", 4);

    private final String _externalName;

    private final int    _index;

    DNSOptionCode(String name, int index) {
        _externalName = name;
        _index = index;
    }

    /**
     * Return the string representation of this type
     * 
     * @return String
     */
    public String externalName() {
        return _externalName;
    }

    /**
     * Return the numeric value of this type
     * 
     * @return String
     */
    public int indexValue() {
        return _index;
    }

    /**
     * @param optioncode
     * @return label
     */
    public static DNSOptionCode resultCodeForFlags(int optioncode) {
        int maskedIndex = optioncode;
        for (DNSOptionCode aCode : DNSOptionCode.values()) {
            if (aCode._index == maskedIndex) return aCode;
        }
        return Unknown;
    }

    @Override
    public String toString() {
        return this.name() + " index " + this.indexValue();
    }

}