心动冒险岛原创核心技术,防万能网关源码

LoginPasswordHandler.java
handlePacket函数，封包前6位就是客户端发来的mac

        int[] bytes = new int[6];
        for (int i = 0; i < bytes.length; i++) {
            bytes[i] = slea.readByteAsInt();
        }
        StringBuilder sps = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            sps.append(StringUtil.getLeftPaddedStr(Integer.toHexString(bytes[i]).toUpperCase(), '0', 2));
            sps.append("-");
        }
        String macData = sps.toString();
        macData = macData.substring(0, macData.length() - 1);
        c.setMac(macData);

        if (LoginServer.isCheckMacs() && CheckLandersMac.checkMac(macData) || isBanned) {
            c.clearInformation();
            c.getSession().write(MaplePacketCreator.serverNotice(1, "无法进入游戏."));
            c.getSession().write(LoginPacket.getLoginFailed(16));
            return;
        }

StringUtil.getLeftPaddedStr

    public static String getLeftPaddedStr(String in, char padchar, int length) { //左
        StringBuilder builder = new StringBuilder(length);
        for (int x = in.getBytes().length; x < length; x++) {
            builder.append(padchar);
        }
        builder.append(in);
        return builder.toString();
    }

CheckLandersMac.checkMac

/*
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 */
package handling.login.handler;

import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.net.Socket;

/**
 *
 * @author qhms
 */
public class CheckLandersMac {

    public static boolean checkMac(String mac) {
        String host = "127.0.0.1";
        int port = 20130;
        StringBuffer sb = new StringBuffer();
        try {
            //与服务端建立连接
            Socket client = new Socket(host, port);
            //建立连接后就可以往服务端写数据了 
            Writer writer = new OutputStreamWriter(client.getOutputStream());
            final String wrms = "100|" + mac + "\r\n";
            writer.write(wrms);
            writer.flush();
            //写完以后进行读操作 
            Reader reader = new InputStreamReader(client.getInputStream());
            char chars[] = new char[64];
            int len;
            String temp;
            int index;
            while ((len = reader.read(chars)) != -1) {
                temp = new String(chars, 0, len);
                if ((index = temp.indexOf("eof")) != -1) { 
                   sb.append(temp.substring(0, index)); 
                   break; 
                } 
                sb.append(temp);
            }
            writer.close();
            reader.close();
            client.close();
        } catch (Exception e) {
            System.err.println(e);
        }
        return sb.toString().endsWith("no");
    }
}