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This is a library do decode LoRaWan packets

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/*
 * The MIT License
 *
 * Copyright 2016 Romain Cambier .
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package be.romaincambier.lorawan;

import be.romaincambier.lorawan.exceptions.MalformedPacketException;

/**
 *
 * @author Romain Cambier
 */
public enum MajorVersion {

    LORAWAN_R_1((byte) 0);

    private final byte identifier;

    private MajorVersion(byte _identifier) {
        identifier = _identifier;
    }
    
    public byte value(){
        return identifier;
    }

    public static MajorVersion from(byte _mhdr) throws MalformedPacketException {
        byte mVersion = (byte) -(_mhdr & 0x03);
        for (MajorVersion v : values()) {
            if (v.identifier == mVersion) {
                return v;
            }
        }
        throw new MalformedPacketException("Unknown major version");
    }

}