me.xingrz.prox.tcp.tunnel.OutgoingTunnel.java Source code

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Here is the source code for me.xingrz.prox.tcp.tunnel.OutgoingTunnel.java

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/*
 * Copyright (C) 2015 XiNGRZ <chenxingyu92@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package me.xingrz.prox.tcp.tunnel;

import org.apache.commons.io.IOUtils;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.Selector;

import me.xingrz.prox.logging.FormattingLogger;
import me.xingrz.prox.logging.FormattingLoggers;

public class OutgoingTunnel extends RemoteTunnel {

    private ProxyHandler proxy;

    public OutgoingTunnel(Selector selector, String sessionKey) throws IOException {
        super(selector, sessionKey);
    }

    @Override
    protected FormattingLogger getLogger(String sessionKey) {
        return FormattingLoggers.getContextLogger(sessionKey);
    }

    public void setProxy(ProxyHandler proxy) {
        this.proxy = proxy;
    }

    @Override
    protected void onConnected() {
    }

    @Override
    protected void handshake() {
        if (proxy == null) {
            super.handshake();
            return;
        }

        ByteBuffer handshake = proxy.handshake();
        if (handshake == null || !handshake.hasRemaining()) {
            super.handshake();
            return;
        }

        if (!writeInternal(handshake)) {
            logger.w("Failed to handshake");
            IOUtils.closeQuietly(this);
        }
    }

    @Override
    protected boolean afterReceived(ByteBuffer buffer) {
        if (proxy == null) {
            return false;
        }

        if (proxy.isEstablished()) {
            return false;
        }

        if (proxy.establish(buffer)) {
            establish();
        }

        return true;
    }

    @Override
    public boolean isEstablished() {
        return super.isEstablished() && (proxy == null || proxy.isEstablished());
    }

    @Override
    protected void onEstablished() {
    }

    @Override
    protected void beforeSending(ByteBuffer buffer) {
        if (proxy != null) {
            proxy.beforeSending(buffer);
        }
    }

    @Override
    protected void onClose() {
        if (proxy != null) {
            proxy.onClose();
        }
    }

}