联想天工 802.1x认证报文发送

package ZClient;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import jpcap.JpcapSender;
import jpcap.packet.EthernetPacket;
import jpcap.packet.Packet;
/**
 *  802.1x packet sender
 * @author Lingle<p>
 * Email: mea08@126.com<p>
 */
public class EAPSender {

    private final EthernetPacket etherpacket = new EthernetPacket();
    private byte[] localIp =null;
    private JpcapSender capSender =null;
    private byte[] username =null;
    private byte[] password =null;
    private final byte[] lenovoMAC = { 0x01, (byte) 0x80, (byte) 0xc2, 0x00, 0x00, 0x03 };

    public class EAPNameExcetion extends Exception {
        private static final long serialVersionUID = 4518311057238635826L;
        public EAPNameExcetion(String e) {
            super(e + ": No Name or Password!");
        }
    }

    public EAPSender() {}

    public void setSender(JpcapSender sender, byte[] ip, byte[] mac){
        etherpacket.frametype = (short) 0x888e;
        etherpacket.src_mac = mac;
        etherpacket.dst_mac = lenovoMAC;
        localIp = ip;
        capSender = sender;
    }
    
    public void setName(String name, String pass) {
        if (name!=null) username = name.getBytes();
        if (pass!=null) password = pass.getBytes();
    }

    public boolean ckeckName() {
        if (username==null || password==null) {
            return false;
        }
        if (username.length==0 || password.length==0) {
            return false;
        }
        return true;
    }

    private byte[] MD5PwFill(byte id, byte[] attachkey) {
        byte md5pw[] = new byte[16];
        byte pwkey[] = new byte[17 + password.length];
        pwkey[0] = id;
        System.arraycopy(password, 0, pwkey, 1, password.length);
        System.arraycopy(attachkey, 0, pwkey, 1 + password.length, 16);// MD5-Attach-KEY
        try {
            md5pw = MessageDigest.getInstance("MD5").digest(pwkey);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return md5pw;
    }
    
    public void sendEapStart() throws EAPNameExcetion {
        if (ckeckName()) {
        Packet EAP_start = new Packet();
        EAP_start.data = new byte[50];
        byte startdata[] = { 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x2f,(byte) 0xfc, 0x03, 0x01 };
        System.arraycopy(startdata, 0, EAP_start.data, 0, startdata.length);
        EAP_start.datalink = etherpacket;
        capSender.sendPacket(EAP_start);
        } else {
            throw new EAPNameExcetion("Error to send EAP_START");
        }
    }

    public void sendEapOnline() {
        Packet EAP_online = new Packet();
        EAP_online.data = new byte[50];// 64-14
        byte[] onlinedata = { 0x01, (byte) 0xfc, 0x00, 0x0c };// 0xfc=252
        System.arraycopy(onlinedata, 0, EAP_online.data, 0, onlinedata.length);
        System.arraycopy(localIp, 0, EAP_online.data, onlinedata.length + 8,
                localIp.length);// ip offset:8 byte
        EAP_online.datalink = etherpacket;
        capSender.sendPacket(EAP_online);
    }    

    public void sendEapLogOff() {
        Packet EAP_logoff = new Packet();
        EAP_logoff.data = new byte[50];// 64-14
        byte logoffdata[] = { 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, (byte) 0x2f,
                (byte) 0xfc, 0x00, 0x00 };
        System.arraycopy(logoffdata, 0, EAP_logoff.data, 0, logoffdata.length);
        EAP_logoff.datalink = etherpacket;
        capSender.sendPacket(EAP_logoff);
    }
    
    public void sendEapName(byte id) throws EAPNameExcetion {
        if (ckeckName()) {
            Packet EAP_UserName = new Packet();
            EAP_UserName.data = new byte[50];// 64-14
            short bodylen = (short) (username.length + 5);// Extensible Authentication Protocol Length
            byte[] namehead = { 0x01, 0x00, (byte) (bodylen >> 8),
                    (byte) bodylen, 0x02, id, (byte) (bodylen >> 8),
                    (byte) bodylen, 0x01 };

            System.arraycopy(namehead, 0, EAP_UserName.data, 0, namehead.length);
            System.arraycopy(username, 0, EAP_UserName.data, namehead.length,
                    username.length);

            EAP_UserName.datalink = etherpacket;
            capSender.sendPacket(EAP_UserName);
        } else {
            throw new EAPNameExcetion("Error to send EAP_USERNAME");
        }
    }

    public void sendEapPassWord(byte id, byte[] attachkey)throws EAPNameExcetion {
        if (ckeckName()) {
            Packet EAP_PassWord = new Packet();
            byte passtail[] = { 0x00, 0x00, 0x2f, (byte) 0xfc, 0x00, 0x15,
                    0x01, 0x01, 0x00 };
            short bodylen = (short) (username.length + 22);// Extensible Authentication  Protocol Length
            byte[] namehead = { 0x01, 0x00, (byte) (bodylen >> 8),
                    (byte) bodylen, 0x02, id, (byte) (bodylen >> 8),
                    (byte) bodylen, 0x04, 0x10 };
            byte[] md5 = MD5PwFill(id, attachkey);
            EAP_PassWord.data = new byte[bodylen + 35];
            System.arraycopy(namehead, 0, EAP_PassWord.data, 0, namehead.length);
            System.arraycopy(md5, 0, EAP_PassWord.data, namehead.length,
                    md5.length);
            System.arraycopy(username, 0, EAP_PassWord.data, namehead.length
                    + md5.length, username.length);
            System.arraycopy(localIp, 0, EAP_PassWord.data, namehead.length
                    + md5.length + username.length, localIp.length);
            System.arraycopy(passtail, 0, EAP_PassWord.data, namehead.length
                    + md5.length + username.length + localIp.length,
                    passtail.length);

            EAP_PassWord.datalink = etherpacket;
            capSender.sendPacket(EAP_PassWord);
        } else {
            throw new EAPNameExcetion(" Error to send EAP_PASSWORD");
        }
    }

}