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https://codeberg.org/Mercury-IM/Smack
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git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@11821 b35dd754-fafc-0310-a699-88a17e54d16e
118 lines
4.2 KiB
Java
118 lines
4.2 KiB
Java
/**
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.bytestreams.socks5;
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import java.io.IOException;
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import java.net.Socket;
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import java.util.concurrent.TimeoutException;
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import org.jivesoftware.smack.Connection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smackx.bytestreams.socks5.packet.Bytestream;
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import org.jivesoftware.smackx.bytestreams.socks5.packet.Bytestream.StreamHost;
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import org.jivesoftware.smackx.packet.SyncPacketSend;
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/**
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* Implementation of a SOCKS5 client used on the initiators side. This is needed because connecting
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* to the local SOCKS5 proxy differs form the regular way to connect to a SOCKS5 proxy. Additionally
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* a remote SOCKS5 proxy has to be activated by the initiator before data can be transferred between
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* the peers.
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*
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* @author Henning Staib
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*/
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class Socks5ClientForInitiator extends Socks5Client {
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/* the XMPP connection used to communicate with the SOCKS5 proxy */
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private Connection connection;
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/* the session ID used to activate SOCKS5 stream */
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private String sessionID;
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/* the target JID used to activate SOCKS5 stream */
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private String target;
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/**
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* Creates a new SOCKS5 client for the initiators side.
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*
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* @param streamHost containing network settings of the SOCKS5 proxy
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* @param digest identifying the SOCKS5 Bytestream
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* @param connection the XMPP connection
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* @param sessionID the session ID of the SOCKS5 Bytestream
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* @param target the target JID of the SOCKS5 Bytestream
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*/
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public Socks5ClientForInitiator(StreamHost streamHost, String digest, Connection connection,
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String sessionID, String target) {
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super(streamHost, digest);
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this.connection = connection;
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this.sessionID = sessionID;
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this.target = target;
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}
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public Socket getSocket(int timeout) throws IOException, XMPPException, InterruptedException,
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TimeoutException {
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Socket socket = null;
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// check if stream host is the local SOCKS5 proxy
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if (this.streamHost.getJID().equals(this.connection.getUser())) {
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Socks5Proxy socks5Server = Socks5Proxy.getSocks5Proxy();
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socket = socks5Server.getSocket(this.digest);
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if (socket == null) {
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throw new XMPPException("target is not connected to SOCKS5 proxy");
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}
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}
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else {
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socket = super.getSocket(timeout);
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try {
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activate();
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}
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catch (XMPPException e) {
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socket.close();
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throw new XMPPException("activating SOCKS5 Bytestream failed", e);
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}
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}
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return socket;
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}
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/**
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* Activates the SOCKS5 Bytestream by sending a XMPP SOCKS5 Bytestream activation packet to the
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* SOCKS5 proxy.
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*/
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private void activate() throws XMPPException {
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Bytestream activate = createStreamHostActivation();
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// if activation fails #getReply throws an exception
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SyncPacketSend.getReply(this.connection, activate);
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}
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/**
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* Returns a SOCKS5 Bytestream activation packet.
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*
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* @return SOCKS5 Bytestream activation packet
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*/
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private Bytestream createStreamHostActivation() {
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Bytestream activate = new Bytestream(this.sessionID);
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activate.setMode(null);
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activate.setType(IQ.Type.SET);
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activate.setTo(this.streamHost.getJID());
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activate.setToActivate(this.target);
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return activate;
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}
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}
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