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Francisco Vives 2007-05-17 22:07:20 +00:00 committed by francisco
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commit 51272c823d
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189
source/org/jivesoftware/smackx/filetransfer/CopyOffiletransfer/FaultTolerantNegotiator.java Normal file
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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.SmackConfiguration;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.filter.OrFilter;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smackx.packet.StreamInitiation;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.*;
import java.util.List;
import java.util.ArrayList;
/**
* The fault tolerant negotiator takes two stream negotiators, the primary and the secondary
* negotiator. If the primary negotiator fails during the stream negotiaton process, the second
* negotiator is used.
*/
public class FaultTolerantNegotiator extends StreamNegotiator {
private StreamNegotiator primaryNegotiator;
private StreamNegotiator secondaryNegotiator;
private XMPPConnection connection;
private PacketFilter primaryFilter;
private PacketFilter secondaryFilter;
public FaultTolerantNegotiator(XMPPConnection connection, StreamNegotiator primary,
StreamNegotiator secondary) {
this.primaryNegotiator = primary;
this.secondaryNegotiator = secondary;
this.connection = connection;
}
public PacketFilter getInitiationPacketFilter(String from, String streamID) {
if (primaryFilter == null || secondaryFilter == null) {
primaryFilter = primaryNegotiator.getInitiationPacketFilter(from, streamID);
secondaryFilter = secondaryNegotiator.getInitiationPacketFilter(from, streamID);
}
return new OrFilter(primaryFilter, secondaryFilter);
}
InputStream negotiateIncomingStream(Packet streamInitiation) throws XMPPException {
throw new UnsupportedOperationException("Negotiation only handled by create incoming " +
"stream method.");
}
final Packet initiateIncomingStream(XMPPConnection connection, StreamInitiation initiation) {
throw new UnsupportedOperationException("Initiation handled by createIncomingStream " +
"method");
}
public InputStream createIncomingStream(StreamInitiation initiation) throws XMPPException {
PacketCollector collector = connection.createPacketCollector(
getInitiationPacketFilter(initiation.getFrom(), initiation.getSessionID()));
System.out.println(new java.util.Date().toString() + ": FaultTolerantNegotiator>createIncomingStream:80");
connection.sendPacket(super.createInitiationAccept(initiation, getNamespaces()));
System.out.println(new java.util.Date().toString() + ": FaultTolerantNegotiator>createIncomingStream:82");
CompletionService<InputStream> service
= new ExecutorCompletionService<InputStream>(Executors.newFixedThreadPool(2));
List<Future<InputStream>> futures = new ArrayList<Future<InputStream>>();
InputStream stream = null;
XMPPException exception = null;
try {
futures.add(service.submit(new NegotiatorService(collector)));
futures.add(service.submit(new NegotiatorService(collector)));
System.out.println(new java.util.Date().toString() + ": FaultTolerantNegotiator>createIncomingStream:92");
int i = 0;
while (stream == null && i < futures.size()) {
Future<InputStream> future;
try {
i++;
System.out.println(new java.util.Date().toString() + ": FaultTolerantNegotiator>createIncomingStream:99");
future = service.poll(10, TimeUnit.SECONDS);
System.out.println(new java.util.Date().toString() + ": FaultTolerantNegotiator>createIncomingStream:101");
}
catch (InterruptedException e) {
continue;
}
if (future == null) {
continue;
}
try {
stream = future.get();
}
catch (InterruptedException e) {
/* Do Nothing */
}
catch (ExecutionException e) {
exception = new XMPPException(e.getCause());
}
}
}
finally {
for (Future<InputStream> future : futures) {
future.cancel(true);
}
collector.cancel();
}
if (stream == null) {
if (exception != null) {
throw exception;
}
else {
throw new XMPPException("File transfer negotiation failed.");
}
}
return stream;
}
private StreamNegotiator determineNegotiator(Packet streamInitiation) {
return primaryFilter.accept(streamInitiation) ? primaryNegotiator : secondaryNegotiator;
}
public OutputStream createOutgoingStream(String streamID, String initiator, String target)
throws XMPPException {
OutputStream stream;
try {
stream = primaryNegotiator.createOutgoingStream(streamID, initiator, target);
}
catch (XMPPException ex) {
stream = secondaryNegotiator.createOutgoingStream(streamID, initiator, target);
}
return stream;
}
public String[] getNamespaces() {
String[] primary = primaryNegotiator.getNamespaces();
String[] secondary = secondaryNegotiator.getNamespaces();
String[] namespaces = new String[primary.length + secondary.length];
System.arraycopy(primary, 0, namespaces, 0, primary.length);
System.arraycopy(secondary, 0, namespaces, primary.length, secondary.length);
return namespaces;
}
public void cleanup() {
}
private class NegotiatorService implements Callable<InputStream> {
private PacketCollector collector;
NegotiatorService(PacketCollector collector) {
this.collector = collector;
}
public InputStream call() throws Exception {
Packet streamInitiation = collector.nextResult(
SmackConfiguration.getPacketReplyTimeout() * 2);
if (streamInitiation == null) {
throw new XMPPException("No response from remote client");
}
StreamNegotiator negotiator = determineNegotiator(streamInitiation);
return negotiator.negotiateIncomingStream(streamInitiation);
}
}
}

376
source/org/jivesoftware/smackx/filetransfer/CopyOffiletransfer/FileTransfer.java Normal file
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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.jivesoftware.smack.XMPPException;
/**
* Contains the generic file information and progress related to a particular
* file transfer.
*
* @author Alexander Wenckus
*
*/
public abstract class FileTransfer {
private String fileName;
private String filePath;
private long fileSize;
private String peer;
private Status status = Status.initial;
private final Object statusMonitor = new Object();
protected FileTransferNegotiator negotiator;
protected String streamID;
protected long amountWritten = -1;
private Error error;
private Exception exception;
/**
* Buffer size between input and output
*/
private static final int BUFFER_SIZE = 8192;
protected FileTransfer(String peer, String streamID,
FileTransferNegotiator negotiator) {
this.peer = peer;
this.streamID = streamID;
this.negotiator = negotiator;
}
protected void setFileInfo(String fileName, long fileSize) {
this.fileName = fileName;
this.fileSize = fileSize;
}
protected void setFileInfo(String path, String fileName, long fileSize) {
this.filePath = path;
this.fileName = fileName;
this.fileSize = fileSize;
}
/**
* Returns the size of the file being transfered.
*
* @return Returns the size of the file being transfered.
*/
public long getFileSize() {
return fileSize;
}
/**
* Returns the name of the file being transfered.
*
* @return Returns the name of the file being transfered.
*/
public String getFileName() {
return fileName;
}
/**
* Returns the local path of the file.
*
* @return Returns the local path of the file.
*/
public String getFilePath() {
return filePath;
}
/**
* Returns the JID of the peer for this file transfer.
*
* @return Returns the JID of the peer for this file transfer.
*/
public String getPeer() {
return peer;
}
/**
* Returns the progress of the file transfer as a number between 0 and 1.
*
* @return Returns the progress of the file transfer as a number between 0
* and 1.
*/
public double getProgress() {
if (amountWritten <= 0 || fileSize <= 0) {
return 0;
}
return (double) amountWritten / (double) fileSize;
}
/**
* Returns true if the transfer has been cancelled, if it has stopped because
* of a an error, or the transfer completed succesfully.
*
* @return Returns true if the transfer has been cancelled, if it has stopped
* because of a an error, or the transfer completed succesfully.
*/
public boolean isDone() {
return status == Status.cancelled || status == Status.error
|| status == Status.complete || status == Status.refused;
}
/**
* Retuns the current status of the file transfer.
*
* @return Retuns the current status of the file transfer.
*/
public Status getStatus() {
return status;
}
protected void setError(Error type) {
this.error = type;
}
/**
* When {@link #getStatus()} returns that there was an {@link Status#error}
* during the transfer, the type of error can be retrieved through this
* method.
*
* @return Returns the type of error that occured if one has occured.
*/
public Error getError() {
return error;
}
/**
* If an exception occurs asynchronously it will be stored for later
* retrival. If there is an error there maybe an exception set.
*
* @return The exception that occured or null if there was no exception.
* @see #getError()
*/
public Exception getException() {
return exception;
}
/**
* Cancels the file transfer.
*/
public abstract void cancel();
protected void setException(Exception exception) {
this.exception = exception;
}
protected void setStatus(Status status) {
synchronized (statusMonitor) {
this.status = status;
}
}
protected boolean updateStatus(Status oldStatus, Status newStatus) {
synchronized (statusMonitor) {
if (oldStatus != status) {
return false;
}
status = newStatus;
return true;
}
}
protected void writeToStream(final InputStream in, final OutputStream out)
throws XMPPException
{
final byte[] b = new byte[BUFFER_SIZE];
int count = 0;
amountWritten = 0;
do {
// write to the output stream
try {
out.write(b, 0, count);
} catch (IOException e) {
throw new XMPPException("error writing to output stream", e);
}
amountWritten += count;
// read more bytes from the input stream
try {
count = in.read(b);
} catch (IOException e) {
throw new XMPPException("error reading from input stream", e);
}
} while (count != -1 && !getStatus().equals(Status.cancelled));
// the connection was likely terminated abrubtly if these are not equal
if (!getStatus().equals(Status.cancelled) && getError() == Error.none
&& amountWritten != fileSize) {
setStatus(Status.error);
this.error = Error.connection;
}
}
/**
* A class to represent the current status of the file transfer.
*
* @author Alexander Wenckus
*
*/
public enum Status {
/**
* An error occured during the transfer.
*
* @see FileTransfer#getError()
*/
error("Error"),
/**
* The initial status of the file transfer.
*/
initial("Initial"),
/**
* The file transfer is being negotiated with the peer. The party
* recieving the file has the option to accept or refuse a file transfer
* request. If they accept, then the process of stream negotiation will
* begin. If they refuse the file will not be transfered.
*
* @see #negotiating_stream
*/
negotiating_transfer("Negotiating Transfer"),
/**
* The peer has refused the file transfer request halting the file
* transfer negotiation process.
*/
refused("Refused"),
/**
* The stream to transfer the file is being negotiated over the chosen
* stream type. After the stream negotiating process is complete the
* status becomes negotiated.
*
* @see #negotiated
*/
negotiating_stream("Negotiating Stream"),
/**
* After the stream negotitation has completed the intermediate state
* between the time when the negotiation is finished and the actual
* transfer begins.
*/
negotiated("Negotiated"),
/**
* The transfer is in progress.
*
* @see FileTransfer#getProgress()
*/
in_progress("In Progress"),
/**
* The transfer has completed successfully.
*/
complete("Complete"),
/**
* The file transfer was canceled
*/
cancelled("Cancelled");
private String status;
private Status(String status) {
this.status = status;
}
public String toString() {
return status;
}
}
/**
* Return the length of bytes written out to the stream.
* @return the amount in bytes written out.
*/
public long getAmountWritten(){
return amountWritten;
}
public enum Error {
/**
* No error
*/
none("No error"),
/**
* The peer did not find any of the provided stream mechanisms
* acceptable.
*/
not_acceptable("The peer did not find any of the provided stream mechanisms acceptable."),
/**
* The provided file to transfer does not exist or could not be read.
*/
bad_file("The provided file to transfer does not exist or could not be read."),
/**
* The remote user did not respond or the connection timed out.
*/
no_response("The remote user did not respond or the connection timed out."),
/**
* An error occured over the socket connected to send the file.
*/
connection("An error occured over the socket connected to send the file."),
/**
* An error occured while sending or recieving the file
*/
stream("An error occured while sending or recieving the file.");
private final String msg;
private Error(String msg) {
this.msg = msg;
}
/**
* Returns a String representation of this error.
*
* @return Returns a String representation of this error.
*/
public String getMessage() {
return msg;
}
public String toString() {
return msg;
}
}
}

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source/org/jivesoftware/smackx/filetransfer/CopyOffiletransfer/FileTransferListener.java Normal file
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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
/**
* File transfers can cause several events to be raised. These events can be
* monitored through this interface.
*
* @author Alexander Wenckus
*/
public interface FileTransferListener {
/**
* A request to send a file has been recieved from another user.
*
* @param request
* The request from the other user.
*/
public void fileTransferRequest(final FileTransferRequest request);
}

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source/org/jivesoftware/smackx/filetransfer/CopyOffiletransfer/FileTransferManager.java Normal file
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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import java.util.ArrayList;
import java.util.List;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.filter.AndFilter;
import org.jivesoftware.smack.filter.IQTypeFilter;
import org.jivesoftware.smack.filter.PacketTypeFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.XMPPError;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smackx.packet.StreamInitiation;
/**
* The file transfer manager class handles the sending and recieving of files.
* To send a file invoke the {@link #createOutgoingFileTransfer(String)} method.
* <p>
* And to recieve a file add a file transfer listener to the manager. The
* listener will notify you when there is a new file transfer request. To create
* the {@link IncomingFileTransfer} object accept the transfer, or, if the
* transfer is not desirable reject it.
*
* @author Alexander Wenckus
*
*/
public class FileTransferManager {
private final FileTransferNegotiator fileTransferNegotiator;
private List listeners;
private XMPPConnection connection;
/**
* Creates a file transfer manager to initiate and receive file transfers.
*
* @param connection
* The XMPPConnection that the file transfers will use.
*/
public FileTransferManager(XMPPConnection connection) {
this.connection = connection;
this.fileTransferNegotiator = FileTransferNegotiator
.getInstanceFor(connection);
}
/**
* Add a file transfer listener to listen to incoming file transfer
* requests.
*
* @param li
* The listener
* @see #removeFileTransferListener(FileTransferListener)
* @see FileTransferListener
*/
public void addFileTransferListener(final FileTransferListener li) {
if (listeners == null) {
initListeners();
}
synchronized (this.listeners) {
listeners.add(li);
}
}
private void initListeners() {
listeners = new ArrayList();
connection.addPacketListener(new PacketListener() {
public void processPacket(Packet packet) {
fireNewRequest((StreamInitiation) packet);
}
}, new AndFilter(new PacketTypeFilter(StreamInitiation.class),
new IQTypeFilter(IQ.Type.SET)));
}
protected void fireNewRequest(StreamInitiation initiation) {
FileTransferListener[] listeners = null;
synchronized (this.listeners) {
listeners = new FileTransferListener[this.listeners.size()];
this.listeners.toArray(listeners);
}
FileTransferRequest request = new FileTransferRequest(this, initiation);
for (int i = 0; i < listeners.length; i++) {
listeners[i].fileTransferRequest(request);
}
}
/**
* Removes a file transfer listener.
*
* @param li
* The file transfer listener to be removed
* @see FileTransferListener
*/
public void removeFileTransferListener(final FileTransferListener li) {
if (listeners == null) {
return;
}
synchronized (this.listeners) {
listeners.remove(li);
}
}
/**
* Creates an OutgoingFileTransfer to send a file to another user.
*
* @param userID
* The fully qualified jabber ID with resource of the user to
* send the file to.
* @return The send file object on which the negotiated transfer can be run.
*/
public OutgoingFileTransfer createOutgoingFileTransfer(String userID) {
if (userID == null || StringUtils.parseName(userID).length() <= 0
|| StringUtils.parseServer(userID).length() <= 0
|| StringUtils.parseResource(userID).length() <= 0) {
throw new IllegalArgumentException(
"The provided user id was not fully qualified");
}
return new OutgoingFileTransfer(connection.getUser(), userID,
fileTransferNegotiator.getNextStreamID(),
fileTransferNegotiator);
}
/**
* When the file transfer request is acceptable, this method should be
* invoked. It will create an IncomingFileTransfer which allows the
* transmission of the file to procede.
*
* @param request
* The remote request that is being accepted.
* @return The IncomingFileTransfer which manages the download of the file
* from the transfer initiator.
*/
protected IncomingFileTransfer createIncomingFileTransfer(
FileTransferRequest request) {
if (request == null) {
throw new NullPointerException("RecieveRequest cannot be null");
}
IncomingFileTransfer transfer = new IncomingFileTransfer(request,
fileTransferNegotiator);
transfer.setFileInfo(request.getFileName(), request.getFileSize());
return transfer;
}
protected void rejectIncomingFileTransfer(FileTransferRequest request) {
StreamInitiation initiation = request.getStreamInitiation();
IQ rejection = FileTransferNegotiator.createIQ(
initiation.getPacketID(), initiation.getFrom(), initiation
.getTo(), IQ.Type.ERROR);
rejection.setError(new XMPPError(XMPPError.Condition.forbidden));
connection.sendPacket(rejection);
}
}

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source/org/jivesoftware/smackx/filetransfer/CopyOffiletransfer/FileTransferNegotiator.java Normal file
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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.filter.PacketIDFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.XMPPError;
import org.jivesoftware.smackx.Form;
import org.jivesoftware.smackx.FormField;
import org.jivesoftware.smackx.ServiceDiscoveryManager;
import org.jivesoftware.smackx.packet.DataForm;
import org.jivesoftware.smackx.packet.StreamInitiation;
import java.net.URLConnection;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
/**
* Manages the negotiation of file transfers according to JEP-0096. If a file is
* being sent the remote user chooses the type of stream under which the file
* will be sent.
*
* @author Alexander Wenckus
* @see <a href=http://www.jabber.org/jeps/jep-0096.html>JEP-0096: File Transfer</a>
*/
public class FileTransferNegotiator {
// Static
/**
* The XMPP namespace of the SOCKS5 bytestream
*/
public static final String BYTE_STREAM = "http://jabber.org/protocol/bytestreams";
/**
* The XMPP namespace of the In-Band bytestream
*/
public static final String INBAND_BYTE_STREAM = "http://jabber.org/protocol/ibb";
private static final String[] NAMESPACE = {
"http://jabber.org/protocol/si/profile/file-transfer",
"http://jabber.org/protocol/si", BYTE_STREAM, INBAND_BYTE_STREAM};
private static final String[] PROTOCOLS = {BYTE_STREAM, INBAND_BYTE_STREAM};
private static final Map<XMPPConnection, FileTransferNegotiator> transferObject =
new ConcurrentHashMap<XMPPConnection, FileTransferNegotiator>();
private static final String STREAM_INIT_PREFIX = "jsi_";
protected static final String STREAM_DATA_FIELD_NAME = "stream-method";
private static final Random randomGenerator = new Random();
/**
* A static variable to use only offer IBB for file transfer. It is generally recommend to only
* set this variable to true for testing purposes as IBB is the backup file transfer method
* and shouldn't be used as the only transfer method in production systems.
*/
public static boolean IBB_ONLY = false;
/**
* Returns the file transfer negotiator related to a particular connection.
* When this class is requested on a particular connection the file transfer
* service is automatically enabled.
*
* @param connection The connection for which the transfer manager is desired
* @return The IMFileTransferManager
*/
public static FileTransferNegotiator getInstanceFor(
final XMPPConnection connection) {
if (connection == null) {
throw new IllegalArgumentException("Connection cannot be null");
}
if (!connection.isConnected()) {
return null;
}
if (transferObject.containsKey(connection)) {
return transferObject.get(connection);
}
else {
FileTransferNegotiator transfer = new FileTransferNegotiator(
connection);
setServiceEnabled(connection, true);
transferObject.put(connection, transfer);
return transfer;
}
}
/**
* Enable the Jabber services related to file transfer on the particular
* connection.
*
* @param connection The connection on which to enable or disable the services.
* @param isEnabled True to enable, false to disable.
*/
public static void setServiceEnabled(final XMPPConnection connection,
final boolean isEnabled) {
ServiceDiscoveryManager manager = ServiceDiscoveryManager
.getInstanceFor(connection);
for (String ns : NAMESPACE) {
if (isEnabled) {
manager.addFeature(ns);
}
else {
manager.removeFeature(ns);
}
}
}
/**
* Checks to see if all file transfer related services are enabled on the
* connection.
*
* @param connection The connection to check
* @return True if all related services are enabled, false if they are not.
*/
public static boolean isServiceEnabled(final XMPPConnection connection) {
for (String ns : NAMESPACE) {
if (!ServiceDiscoveryManager.getInstanceFor(connection).includesFeature(ns))
return false;
}
return true;
}
/**
* A convience method to create an IQ packet.
*
* @param ID The packet ID of the
* @param to To whom the packet is addressed.
* @param from From whom the packet is sent.
* @param type The iq type of the packet.
* @return The created IQ packet.
*/
public static IQ createIQ(final String ID, final String to,
final String from, final IQ.Type type) {
IQ iqPacket = new IQ() {
public String getChildElementXML() {
return null;
}
};
iqPacket.setPacketID(ID);
iqPacket.setTo(to);
iqPacket.setFrom(from);
iqPacket.setType(type);
return iqPacket;
}
/**
* Returns a collection of the supported transfer protocols.
*
* @return Returns a collection of the supported transfer protocols.
*/
public static Collection getSupportedProtocols() {
return Collections.unmodifiableList(Arrays.asList(PROTOCOLS));
}
// non-static
private final XMPPConnection connection;
private final Socks5TransferNegotiatorManager byteStreamTransferManager;
private final StreamNegotiator inbandTransferManager;
private FileTransferNegotiator(final XMPPConnection connection) {
configureConnection(connection);
this.connection = connection;
byteStreamTransferManager = new Socks5TransferNegotiatorManager(connection);
inbandTransferManager = new IBBTransferNegotiator(connection);
}
private void configureConnection(final XMPPConnection connection) {
connection.addConnectionListener(new ConnectionListener() {
public void connectionClosed() {
cleanup(connection);
}
public void connectionClosedOnError(Exception e) {
cleanup(connection);
}
public void reconnectionFailed(Exception e) {
// ignore
}
public void reconnectionSuccessful() {
// ignore
}
public void reconnectingIn(int seconds) {
// ignore
}
});
}
private void cleanup(final XMPPConnection connection) {
if (transferObject.remove(connection) != null) {
byteStreamTransferManager.cleanup();
inbandTransferManager.cleanup();
}
}
/**
* Selects an appropriate stream negotiator after examining the incoming file transfer request.
*
* @param request The related file transfer request.
* @return The file transfer object that handles the transfer
* @throws XMPPException If there are either no stream methods contained in the packet, or
* there is not an appropriate stream method.
*/
public StreamNegotiator selectStreamNegotiator(
FileTransferRequest request) throws XMPPException {
StreamInitiation si = request.getStreamInitiation();
FormField streamMethodField = getStreamMethodField(si
.getFeatureNegotiationForm());
if (streamMethodField == null) {
String errorMessage = "No stream methods contained in packet.";
XMPPError error = new XMPPError(XMPPError.Condition.bad_request, errorMessage);
IQ iqPacket = createIQ(si.getPacketID(), si.getFrom(), si.getTo(),
IQ.Type.ERROR);
iqPacket.setError(error);
connection.sendPacket(iqPacket);
throw new XMPPException(errorMessage, error);
}
// select the appropriate protocol
StreamNegotiator selectedStreamNegotiator;
try {
selectedStreamNegotiator = getNegotiator(streamMethodField);
}
catch (XMPPException e) {
IQ iqPacket = createIQ(si.getPacketID(), si.getFrom(), si.getTo(),
IQ.Type.ERROR);
iqPacket.setError(e.getXMPPError());
connection.sendPacket(iqPacket);
throw e;
}
// return the appropriate negotiator
return selectedStreamNegotiator;
}
private FormField getStreamMethodField(DataForm form) {
FormField field = null;
for (Iterator it = form.getFields(); it.hasNext();) {
field = (FormField) it.next();
if (field.getVariable().equals(STREAM_DATA_FIELD_NAME)) {
break;
}
field = null;
}
return field;
}
private StreamNegotiator getNegotiator(final FormField field)
throws XMPPException {
String variable;
boolean isByteStream = false;
boolean isIBB = false;
for (Iterator it = field.getOptions(); it.hasNext();) {
variable = ((FormField.Option) it.next()).getValue();
if (variable.equals(BYTE_STREAM) && !IBB_ONLY) {
isByteStream = true;
}
else if (variable.equals(INBAND_BYTE_STREAM)) {
isIBB = true;
}
}
if (!isByteStream && !isIBB) {
XMPPError error = new XMPPError(XMPPError.Condition.bad_request,
"No acceptable transfer mechanism");
throw new XMPPException(error.getMessage(), error);
}
if (isByteStream && isIBB && field.getType().equals(FormField.TYPE_LIST_MULTI)) {
return new FaultTolerantNegotiator(connection,
byteStreamTransferManager.createNegotiator(),
inbandTransferManager);
}
else if (isByteStream) {
return byteStreamTransferManager.createNegotiator();
}
else {
return inbandTransferManager;
}
}
/**
* Reject a stream initiation request from a remote user.
*
* @param si The Stream Initiation request to reject.
*/
public void rejectStream(final StreamInitiation si) {
XMPPError error = new XMPPError(XMPPError.Condition.forbidden, "Offer Declined");
IQ iqPacket = createIQ(si.getPacketID(), si.getFrom(), si.getTo(),
IQ.Type.ERROR);
iqPacket.setError(error);
connection.sendPacket(iqPacket);
}
/**
* Returns a new, unique, stream ID to identify a file transfer.
*
* @return Returns a new, unique, stream ID to identify a file transfer.
*/
public String getNextStreamID() {
StringBuilder buffer = new StringBuilder();
buffer.append(STREAM_INIT_PREFIX);
buffer.append(Math.abs(randomGenerator.nextLong()));
return buffer.toString();
}
/**
* Send a request to another user to send them a file. The other user has
* the option of, accepting, rejecting, or not responding to a received file
* transfer request.
* <p/>
* If they accept, the packet will contain the other user's choosen stream
* type to send the file across. The two choices this implementation
* provides to the other user for file transfer are <a
* href="http://www.jabber.org/jeps/jep-0065.html">SOCKS5 Bytestreams</a>,
* which is the prefered method of transfer, and <a
* href="http://www.jabber.org/jeps/jep-0047.html">In-Band Bytestreams</a>,
* which is the fallback mechanism.
* <p/>
* The other user may choose to decline the file request if they do not
* desire the file, their client does not support JEP-0096, or if there are
* no acceptable means to transfer the file.
* <p/>
* Finally, if the other user does not respond this method will return null
* after the specified timeout.
*
* @param userID The userID of the user to whom the file will be sent.
* @param streamID The unique identifier for this file transfer.
* @param fileName The name of this file. Preferably it should include an
* extension as it is used to determine what type of file it is.
* @param size The size, in bytes, of the file.
* @param desc A description of the file.
* @param responseTimeout The amount of time, in milliseconds, to wait for the remote
* user to respond. If they do not respond in time, this
* @return Returns the stream negotiator selected by the peer.
* @throws XMPPException Thrown if there is an error negotiating the file transfer.
*/
public StreamNegotiator negotiateOutgoingTransfer(final String userID,
final String streamID, final String fileName, final long size,
final String desc, int responseTimeout) throws XMPPException {
StreamInitiation si = new StreamInitiation();
si.setSesssionID(streamID);
si.setMimeType(URLConnection.guessContentTypeFromName(fileName));
StreamInitiation.File siFile = new StreamInitiation.File(fileName, size);
siFile.setDesc(desc);
si.setFile(siFile);
si.setFeatureNegotiationForm(createDefaultInitiationForm());
si.setFrom(connection.getUser());
si.setTo(userID);
si.setType(IQ.Type.SET);
PacketCollector collector = connection
.createPacketCollector(new PacketIDFilter(si.getPacketID()));
connection.sendPacket(si);
Packet siResponse = collector.nextResult(responseTimeout);
collector.cancel();
if (siResponse instanceof IQ) {
IQ iqResponse = (IQ) siResponse;
if (iqResponse.getType().equals(IQ.Type.RESULT)) {
StreamInitiation response = (StreamInitiation) siResponse;
return getOutgoingNegotiator(getStreamMethodField(response
.getFeatureNegotiationForm()));
}
else if (iqResponse.getType().equals(IQ.Type.ERROR)) {
throw new XMPPException(iqResponse.getError());
}
else {
throw new XMPPException("File transfer response unreadable");
}
}
else {
return null;
}
}
private StreamNegotiator getOutgoingNegotiator(final FormField field)
throws XMPPException {
String variable;
boolean isByteStream = false;
boolean isIBB = false;
for (Iterator<String> it = field.getValues(); it.hasNext();) {
variable = it.next();
if (variable.equals(BYTE_STREAM) && !IBB_ONLY) {
isByteStream = true;
}
else if (variable.equals(INBAND_BYTE_STREAM)) {
isIBB = true;
}
}
if (!isByteStream && !isIBB) {
XMPPError error = new XMPPError(XMPPError.Condition.bad_request,
"No acceptable transfer mechanism");
throw new XMPPException(error.getMessage(), error);
}
if (isByteStream && isIBB) {
return new FaultTolerantNegotiator(connection,
byteStreamTransferManager.createNegotiator(), inbandTransferManager);
}
else if (isByteStream) {
return byteStreamTransferManager.createNegotiator();
}
else {
return inbandTransferManager;
}
}
private DataForm createDefaultInitiationForm() {
DataForm form = new DataForm(Form.TYPE_FORM);
FormField field = new FormField(STREAM_DATA_FIELD_NAME);
field.setType(FormField.TYPE_LIST_MULTI);
if (!IBB_ONLY) {
field.addOption(new FormField.Option(BYTE_STREAM));
}
field.addOption(new FormField.Option(INBAND_BYTE_STREAM));
form.addField(field);
return form;
}
}

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/**
* $Revision:$
* $Date:$
*
* Copyright 2003-2007 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
/**
*
*/
public interface FileTransferNegotiatorManager {
StreamNegotiator createNegotiator();
}

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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smackx.packet.StreamInitiation;
/**
* A request to send a file recieved from another user.
*
* @author Alexander Wenckus
*
*/
public class FileTransferRequest {
private final StreamInitiation streamInitiation;
private final FileTransferManager manager;
/**
* A recieve request is constructed from the Stream Initiation request
* received from the initator.
*
* @param manager
* The manager handling this file transfer
*
* @param si
* The Stream initiaton recieved from the initiator.
*/
public FileTransferRequest(FileTransferManager manager, StreamInitiation si) {
this.streamInitiation = si;
this.manager = manager;
}
/**
* Returns the name of the file.
*
* @return Returns the name of the file.
*/
public String getFileName() {
return streamInitiation.getFile().getName();
}
/**
* Returns the size in bytes of the file.
*
* @return Returns the size in bytes of the file.
*/
public long getFileSize() {
return streamInitiation.getFile().getSize();
}
/**
* Returns the description of the file provided by the requestor.
*
* @return Returns the description of the file provided by the requestor.
*/
public String getDescription() {
return streamInitiation.getFile().getDesc();
}
/**
* Returns the mime-type of the file.
*
* @return Returns the mime-type of the file.
*/
public String getMimeType() {
return streamInitiation.getMimeType();
}
/**
* Returns the fully-qualified jabber ID of the user that requested this
* file transfer.
*
* @return Returns the fully-qualified jabber ID of the user that requested
* this file transfer.
*/
public String getRequestor() {
return streamInitiation.getFrom();
}
/**
* Returns the stream ID that uniquely identifies this file transfer.
*
* @return Returns the stream ID that uniquely identifies this file
* transfer.
*/
public String getStreamID() {
return streamInitiation.getSessionID();
}
/**
* Returns the stream initiation packet that was sent by the requestor which
* contains the parameters of the file transfer being transfer and also the
* methods available to transfer the file.
*
* @return Returns the stream initiation packet that was sent by the
* requestor which contains the parameters of the file transfer
* being transfer and also the methods available to transfer the
* file.
*/
protected StreamInitiation getStreamInitiation() {
return streamInitiation;
}
/**
* Accepts this file transfer and creates the incoming file transfer.
*
* @return Returns the <b><i>IncomingFileTransfer</b></i> on which the
* file transfer can be carried out.
*/
public IncomingFileTransfer accept() {
return manager.createIncomingFileTransfer(this);
}
/**
* Rejects the file transfer request.
*/
public void reject() {
manager.rejectIncomingFileTransfer(this);
}
}

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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.*;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smack.filter.*;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.XMPPError;
import org.jivesoftware.smackx.packet.IBBExtensions;
import org.jivesoftware.smackx.packet.IBBExtensions.Open;
import org.jivesoftware.smackx.packet.StreamInitiation;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* The in-band bytestream file transfer method, or IBB for short, transfers the
* file over the same XML Stream used by XMPP. It is the fall-back mechanism in
* case the SOCKS5 bytestream method of transfering files is not available.
*
* @author Alexander Wenckus
* @see <a href="http://www.jabber.org/jeps/jep-0047.html">JEP-0047: In-Band
* Bytestreams (IBB)</a>
*/
public class IBBTransferNegotiator extends StreamNegotiator {
protected static final String NAMESPACE = "http://jabber.org/protocol/ibb";
public static final int DEFAULT_BLOCK_SIZE = 4096;
private XMPPConnection connection;
/**
* The default constructor for the In-Band Bystream Negotiator.
*
* @param connection The connection which this negotiator works on.
*/
protected IBBTransferNegotiator(XMPPConnection connection) {
this.connection = connection;
}
public PacketFilter getInitiationPacketFilter(String from, String streamID) {
return new AndFilter(new FromContainsFilter(
from), new IBBOpenSidFilter(streamID));
}
InputStream negotiateIncomingStream(Packet streamInitiation) throws XMPPException {
Open openRequest = (Open) streamInitiation;
if (openRequest.getType().equals(IQ.Type.ERROR)) {
throw new XMPPException(openRequest.getError());
}
PacketFilter dataFilter = new IBBMessageSidFilter(openRequest.getFrom(),
openRequest.getSessionID());
PacketFilter closeFilter = new AndFilter(new PacketTypeFilter(
IBBExtensions.Close.class), new FromMatchesFilter(openRequest
.getFrom()));
InputStream stream = new IBBInputStream(openRequest.getSessionID(),
dataFilter, closeFilter);
initInBandTransfer(openRequest);
return stream;
}
public InputStream createIncomingStream(StreamInitiation initiation) throws XMPPException {
Packet openRequest = initiateIncomingStream(connection, initiation);
return negotiateIncomingStream(openRequest);
}
/**
* Creates and sends the response for the open request.
*
* @param openRequest The open request recieved from the peer.
*/
private void initInBandTransfer(final Open openRequest) {
connection.sendPacket(FileTransferNegotiator.createIQ(openRequest
.getPacketID(), openRequest.getFrom(), openRequest.getTo(),
IQ.Type.RESULT));
}
public OutputStream createOutgoingStream(String streamID, String initiator,
String target) throws XMPPException {
Open openIQ = new Open(streamID, DEFAULT_BLOCK_SIZE);
openIQ.setTo(target);
openIQ.setType(IQ.Type.SET);
// wait for the result from the peer
PacketCollector collector = connection
.createPacketCollector(new PacketIDFilter(openIQ.getPacketID()));
connection.sendPacket(openIQ);
// We don't want to wait forever for the result
IQ openResponse = (IQ) collector.nextResult(SmackConfiguration.getPacketReplyTimeout());
collector.cancel();
if (openResponse == null) {
throw new XMPPException("No response from peer on IBB open");
}
IQ.Type type = openResponse.getType();
if (!type.equals(IQ.Type.RESULT)) {
if (type.equals(IQ.Type.ERROR)) {
throw new XMPPException("Target returned an error",
openResponse.getError());
}
else {
throw new XMPPException("Target returned unknown response");
}
}
return new IBBOutputStream(target, streamID, DEFAULT_BLOCK_SIZE);
}
public String[] getNamespaces() {
return new String[]{NAMESPACE};
}
public void cleanup() {
}
private class IBBOutputStream extends OutputStream {
protected byte[] buffer;
protected int count = 0;
protected int seq = 0;
final String userID;
final private IQ closePacket;
private String messageID;
private String sid;
IBBOutputStream(String userID, String sid, int blockSize) {
if (blockSize <= 0) {
throw new IllegalArgumentException("Buffer size <= 0");
}
buffer = new byte[blockSize];
this.userID = userID;
Message template = new Message(userID);
messageID = template.getPacketID();
this.sid = sid;
closePacket = createClosePacket(userID, sid);
}
private IQ createClosePacket(String userID, String sid) {
IQ packet = new IBBExtensions.Close(sid);
packet.setTo(userID);
packet.setType(IQ.Type.SET);
return packet;
}
public void write(int b) throws IOException {
if (count >= buffer.length) {
flushBuffer();
}
buffer[count++] = (byte) b;
}
public synchronized void write(byte b[], int off, int len)
throws IOException {
if (len >= buffer.length) {
// "byte" off the first chunck to write out
writeOut(b, off, buffer.length);
// recursivly call this method again with the lesser amount subtracted.
write(b, off + buffer.length, len - buffer.length);
} else {
writeOut(b, off, len);
}
}
private void writeOut(byte b[], int off, int len) {
if (len > buffer.length - count) {
flushBuffer();
}
System.arraycopy(b, off, buffer, count, len);
count += len;
}
private void flushBuffer() {
writeToXML(buffer, 0, count);
count = 0;
}
private synchronized void writeToXML(byte[] buffer, int offset, int len) {
Message template = createTemplate(messageID + "_" + seq);
IBBExtensions.Data ext = new IBBExtensions.Data(sid);
template.addExtension(ext);
String enc = StringUtils.encodeBase64(buffer, offset, len, false);
ext.setData(enc);
ext.setSeq(seq);
synchronized (this) {
try {
this.wait(100);
}
catch (InterruptedException e) {
/* Do Nothing */
}
}
connection.sendPacket(template);
seq = (seq + 1 == 65535 ? 0 : seq + 1);
}
public void close() throws IOException {
connection.sendPacket(closePacket);
}
public void flush() throws IOException {
flushBuffer();
}
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
public Message createTemplate(String messageID) {
Message template = new Message(userID);
template.setPacketID(messageID);
return template;
}
}
private class IBBInputStream extends InputStream implements PacketListener {
private String streamID;
private PacketCollector dataCollector;
private byte[] buffer;
private int bufferPointer;
private int seq = -1;
private boolean isDone;
private boolean isEOF;
private boolean isClosed;
private IQ closeConfirmation;
private Message lastMess;
private IBBInputStream(String streamID, PacketFilter dataFilter,
PacketFilter closeFilter) {
this.streamID = streamID;
this.dataCollector = connection.createPacketCollector(dataFilter);
connection.addPacketListener(this, closeFilter);
this.bufferPointer = -1;
}
public synchronized int read() throws IOException {
if (isEOF || isClosed) {
return -1;
}
if (bufferPointer == -1 || bufferPointer >= buffer.length) {
loadBufferWait();
}
return (int) buffer[bufferPointer++];
}
public synchronized int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
public synchronized int read(byte[] b, int off, int len)
throws IOException {
if (isEOF || isClosed) {
return -1;
}
if (bufferPointer == -1 || bufferPointer >= buffer.length) {
if (!loadBufferWait()) {
isEOF = true;
return -1;
}
}
if (len - off > buffer.length - bufferPointer) {
len = buffer.length - bufferPointer;
}
System.arraycopy(buffer, bufferPointer, b, off, len);
bufferPointer += len;
return len;
}
private boolean loadBufferWait() throws IOException {
IBBExtensions.Data data;
Message mess = null;
while (mess == null) {
if (isDone) {
mess = (Message) dataCollector.pollResult();
if (mess == null) {
return false;
}
}
else {
mess = (Message) dataCollector.nextResult(1000);
}
}
lastMess = mess;
data = (IBBExtensions.Data) mess.getExtension(
IBBExtensions.Data.ELEMENT_NAME,
IBBExtensions.NAMESPACE);
checkSequence(mess, (int) data.getSeq());
buffer = StringUtils.decodeBase64(data.getData());
bufferPointer = 0;
return true;
}
private void checkSequence(Message mess, int seq) throws IOException {
if (this.seq == 65535) {
this.seq = -1;
}
if (seq - 1 != this.seq) {
cancelTransfer(mess);
throw new IOException("Packets out of sequence");
}
else {
this.seq = seq;
}
}
private void cancelTransfer(Message mess) {
cleanup();
sendCancelMessage(mess);
}
private void cleanup() {
dataCollector.cancel();
connection.removePacketListener(this);
}
private void sendCancelMessage(Message message) {
IQ error = FileTransferNegotiator.createIQ(message.getPacketID(), message.getFrom(), message.getTo(),
IQ.Type.ERROR);
error.setError(new XMPPError(XMPPError.Condition.remote_server_timeout, "Cancel Message Transfer"));
connection.sendPacket(error);
}
public boolean markSupported() {
return false;
}
public void processPacket(Packet packet) {
IBBExtensions.Close close = (IBBExtensions.Close) packet;
if (close.getSessionID().equals(streamID)) {
isDone = true;
closeConfirmation = FileTransferNegotiator.createIQ(packet
.getPacketID(), packet.getFrom(), packet.getTo(),
IQ.Type.RESULT);
}
}
public synchronized void close() throws IOException {
if (isClosed) {
return;
}
cleanup();
if (isEOF) {
sendCloseConfirmation();
}
else if (lastMess != null) {
sendCancelMessage(lastMess);
}
isClosed = true;
}
private void sendCloseConfirmation() {
connection.sendPacket(closeConfirmation);
}
}
private static class IBBOpenSidFilter implements PacketFilter {
private String sessionID;
public IBBOpenSidFilter(String sessionID) {
if (sessionID == null) {
throw new IllegalArgumentException("StreamID cannot be null");
}
this.sessionID = sessionID;
}
public boolean accept(Packet packet) {
if (!IBBExtensions.Open.class.isInstance(packet)) {
return false;
}
IBBExtensions.Open open = (IBBExtensions.Open) packet;
String sessionID = open.getSessionID();
return (sessionID != null && sessionID.equals(this.sessionID));
}
}
private static class IBBMessageSidFilter implements PacketFilter {
private final String sessionID;
private String from;
public IBBMessageSidFilter(String from, String sessionID) {
this.from = from;
this.sessionID = sessionID;
}
public boolean accept(Packet packet) {
if (!(packet instanceof Message)) {
return false;
}
if (!packet.getFrom().equalsIgnoreCase(from)) {
return false;
}
IBBExtensions.Data data = (IBBExtensions.Data) packet.
getExtension(IBBExtensions.Data.ELEMENT_NAME, IBBExtensions.NAMESPACE);
return data != null && data.getSessionID() != null
&& data.getSessionID().equalsIgnoreCase(sessionID);
}
}
}

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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.XMPPException;
import java.io.*;
import java.util.concurrent.*;
/**
* An incoming file transfer is created when the
* {@link FileTransferManager#createIncomingFileTransfer(FileTransferRequest)}
* method is invoked. It is a file being sent to the local user from another
* user on the jabber network. There are two stages of the file transfer to be
* concerned with and they can be handled in different ways depending upon the
* method that is invoked on this class.
* <p/>
* The first way that a file is recieved is by calling the
* {@link #recieveFile()} method. This method, negotiates the appropriate stream
* method and then returns the <b><i>InputStream</b></i> to read the file
* data from.
* <p/>
* The second way that a file can be recieved through this class is by invoking
* the {@link #recieveFile(File)} method. This method returns immediatly and
* takes as its parameter a file on the local file system where the file
* recieved from the transfer will be put.
*
* @author Alexander Wenckus
*/
public class IncomingFileTransfer extends FileTransfer {
private FileTransferRequest recieveRequest;
private InputStream inputStream;
protected IncomingFileTransfer(FileTransferRequest request,
FileTransferNegotiator transferNegotiator) {
super(request.getRequestor(), request.getStreamID(), transferNegotiator);
this.recieveRequest = request;
}
/**
* Negotiates the stream method to transfer the file over and then returns
* the negotiated stream.
*
* @return The negotiated InputStream from which to read the data.
* @throws XMPPException If there is an error in the negotiation process an exception
* is thrown.
*/
public InputStream recieveFile() throws XMPPException {
if (inputStream != null) {
throw new IllegalStateException("Transfer already negotiated!");
}
try {
inputStream = negotiateStream();
}
catch (XMPPException e) {
setException(e);
throw e;
}
return inputStream;
}
/**
* This method negotitates the stream and then transfer's the file over the
* negotiated stream. The transfered file will be saved at the provided
* location.
* <p/>
* This method will return immedialtly, file transfer progress can be
* monitored through several methods:
* <p/>
* <UL>
* <LI>{@link FileTransfer#getStatus()}
* <LI>{@link FileTransfer#getProgress()}
* <LI>{@link FileTransfer#isDone()}
* </UL>
*
* @param file The location to save the file.
* @throws XMPPException when the file transfer fails
* @throws IllegalArgumentException This exception is thrown when the the provided file is
* either null, or cannot be written to.
*/
public void recieveFile(final File file) throws XMPPException {
if (file != null) {
if (!file.exists()) {
try {
file.createNewFile();
}
catch (IOException e) {
throw new XMPPException(
"Could not create file to write too", e);
}
}
if (!file.canWrite()) {
throw new IllegalArgumentException("Cannot write to provided file");
}
}
else {
throw new IllegalArgumentException("File cannot be null");
}
Thread transferThread = new Thread(new Runnable() {
public void run() {
try {
inputStream = negotiateStream();
}
catch (XMPPException e) {
handleXMPPException(e);
return;
}
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
setStatus(Status.in_progress);
writeToStream(inputStream, outputStream);
}
catch (XMPPException e) {
setStatus(Status.error);
setError(Error.stream);
setException(e);
}
catch (FileNotFoundException e) {
setStatus(Status.error);
setError(Error.bad_file);
setException(e);
}
if (getStatus().equals(Status.in_progress)) {
setStatus(Status.complete);
}
if (inputStream != null) {
try {
inputStream.close();
}
catch (Throwable io) {
/* Ignore */
}
}
if (outputStream != null) {
try {
outputStream.close();
}
catch (Throwable io) {
/* Ignore */
}
}
}
}, "File Transfer " + streamID);
transferThread.start();
}
private void handleXMPPException(XMPPException e) {
setStatus(FileTransfer.Status.error);
setException(e);
}
private InputStream negotiateStream() throws XMPPException {
setStatus(Status.negotiating_transfer);
final StreamNegotiator streamNegotiator = negotiator
.selectStreamNegotiator(recieveRequest);
setStatus(Status.negotiating_stream);
FutureTask<InputStream> streamNegotiatorTask = new FutureTask<InputStream>(
new Callable<InputStream>() {
public InputStream call() throws Exception {
System.out.println(new java.util.Date().toString() + ": IncomingFileTransfer>negotiateStream:186");
return streamNegotiator
.createIncomingStream(recieveRequest.getStreamInitiation());
}
});
streamNegotiatorTask.run();
InputStream inputStream = null;
try {
System.out.println(new java.util.Date().toString() + ": IncomingFileTransfer>negotiateStream:194");
inputStream = streamNegotiatorTask.get(15, TimeUnit.SECONDS);
System.out.println(new java.util.Date().toString() + ": IncomingFileTransfer>negotiateStream:196");
}
catch (InterruptedException e) {
// throw new XMPPException("Interruption while executing", e);
}
catch (ExecutionException e) {
System.out.println(new java.util.Date().toString() + ": IncomingFileTransfer>negotiateStream:202 Error in execution");
// throw new XMPPException("Error in execution", e);
}
catch (TimeoutException e) {
// throw new XMPPException("Request timed out", e);
}
finally {
streamNegotiatorTask.cancel(true);
}
setStatus(Status.negotiated);
return inputStream;
}
public void cancel() {
setStatus(Status.cancelled);
}
}

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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.XMPPError;
import java.io.*;
/**
* Handles the sending of a file to another user. File transfer's in jabber have
* several steps and there are several methods in this class that handle these
* steps differently.
*
* @author Alexander Wenckus
*
*/
public class OutgoingFileTransfer extends FileTransfer {
private static int RESPONSE_TIMEOUT = 60 * 1000;
private NegotiationProgress callback;
/**
* Returns the time in milliseconds after which the file transfer
* negotiation process will timeout if the other user has not responded.
*
* @return Returns the time in milliseconds after which the file transfer
* negotiation process will timeout if the remote user has not
* responded.
*/
public static int getResponseTimeout() {
return RESPONSE_TIMEOUT;
}
/**
* Sets the time in milliseconds after which the file transfer negotiation
* process will timeout if the other user has not responded.
*
* @param responseTimeout
* The timeout time in milliseconds.
*/
public static void setResponseTimeout(int responseTimeout) {
RESPONSE_TIMEOUT = responseTimeout;
}
private OutputStream outputStream;
private String initiator;
private Thread transferThread;
protected OutgoingFileTransfer(String initiator, String target,
String streamID, FileTransferNegotiator transferNegotiator) {
super(target, streamID, transferNegotiator);
this.initiator = initiator;
}
protected void setOutputStream(OutputStream stream) {
if (outputStream == null) {
this.outputStream = stream;
}
}
/**
* Returns the output stream connected to the peer to transfer the file. It
* is only available after it has been succesfully negotiated by the
* {@link StreamNegotiator}.
*
* @return Returns the output stream connected to the peer to transfer the
* file.
*/
protected OutputStream getOutputStream() {
if (getStatus().equals(FileTransfer.Status.negotiated)) {
return outputStream;
} else {
return null;
}
}
/**
* This method handles the negotiation of the file transfer and the stream,
* it only returns the created stream after the negotiation has been completed.
*
* @param fileName
* The name of the file that will be transmitted. It is
* preferable for this name to have an extension as it will be
* used to determine the type of file it is.
* @param fileSize
* The size in bytes of the file that will be transmitted.
* @param description
* A description of the file that will be transmitted.
* @return The OutputStream that is connected to the peer to transmit the
* file.
* @throws XMPPException
* Thrown if an error occurs during the file transfer
* negotiation process.
*/
public synchronized OutputStream sendFile(String fileName, long fileSize,
String description) throws XMPPException {
if (isDone() || outputStream != null) {
throw new IllegalStateException(
"The negotation process has already"
+ " been attempted on this file transfer");
}
try {
this.outputStream = negotiateStream(fileName, fileSize, description);
} catch (XMPPException e) {
handleXMPPException(e);
throw e;
}
return outputStream;
}
/**
* This methods handles the transfer and stream negotiation process. It
* returns immediately and its progress will be updated through the
* {@link NegotiationProgress} callback.
*
* @param fileName
* The name of the file that will be transmitted. It is
* preferable for this name to have an extension as it will be
* used to determine the type of file it is.
* @param fileSize
* The size in bytes of the file that will be transmitted.
* @param description
* A description of the file that will be transmitted.
* @param progress
* A callback to monitor the progress of the file transfer
* negotiation process and to retrieve the OutputStream when it
* is complete.
*/
public synchronized void sendFile(final String fileName,
final long fileSize, final String description,
final NegotiationProgress progress)
{
if(progress == null) {
throw new IllegalArgumentException("Callback progress cannot be null.");
}
checkTransferThread();
if (isDone() || outputStream != null) {
throw new IllegalStateException(
"The negotation process has already"
+ " been attempted for this file transfer");
}
this.callback = progress;
transferThread = new Thread(new Runnable() {
public void run() {
try {
OutgoingFileTransfer.this.outputStream = negotiateStream(
fileName, fileSize, description);
progress.outputStreamEstablished(OutgoingFileTransfer.this.outputStream);
}
catch (XMPPException e) {
handleXMPPException(e);
}
}
}, "File Transfer Negotiation " + streamID);
transferThread.start();
}
private void checkTransferThread() {
if (transferThread != null && transferThread.isAlive() || isDone()) {
throw new IllegalStateException(
"File transfer in progress or has already completed.");
}
}
/**
* This method handles the stream negotiation process and transmits the file
* to the remote user. It returns immediatly and the progress of the file
* transfer can be monitored through several methods:
*
* <UL>
* <LI>{@link FileTransfer#getStatus()}
* <LI>{@link FileTransfer#getProgress()}
* <LI>{@link FileTransfer#isDone()}
* </UL>
*
* @param file the file to transfer to the remote entity.
* @param description a description for the file to transfer.
* @throws XMPPException
* If there is an error during the negotiation process or the
* sending of the file.
*/
public synchronized void sendFile(final File file, final String description)
throws XMPPException {
checkTransferThread();
if (file == null || !file.exists() || !file.canRead()) {
throw new IllegalArgumentException("Could not read file");
} else {
setFileInfo(file.getAbsolutePath(), file.getName(), file.length());
}
transferThread = new Thread(new Runnable() {
public void run() {
try {
outputStream = negotiateStream(file.getName(), file
.length(), description);
} catch (XMPPException e) {
handleXMPPException(e);
return;
}
if (outputStream == null) {
return;
}
if (!updateStatus(Status.negotiated, Status.in_progress)) {
return;
}
InputStream inputStream = null;
try {
inputStream = new FileInputStream(file);
writeToStream(inputStream, outputStream);
} catch (FileNotFoundException e) {
setStatus(FileTransfer.Status.error);
setError(Error.bad_file);
setException(e);
} catch (XMPPException e) {
setStatus(FileTransfer.Status.error);
setException(e);
} finally {
try {
if (inputStream != null) {
inputStream.close();
}
outputStream.flush();
outputStream.close();
} catch (IOException e) {
/* Do Nothing */
}
}
updateStatus(Status.in_progress, FileTransfer.Status.complete);
}
}, "File Transfer " + streamID);
transferThread.start();
}
private void handleXMPPException(XMPPException e) {
XMPPError error = e.getXMPPError();
if (error != null) {
int code = error.getCode();
if (code == 403) {
setStatus(Status.refused);
return;
}
else if (code == 400) {
setStatus(Status.error);
setError(Error.not_acceptable);
}
else {
setStatus(FileTransfer.Status.error);
}
}
setException(e);
}
/**
* Returns the amount of bytes that have been sent for the file transfer. Or
* -1 if the file transfer has not started.
* <p>
* Note: This method is only useful when the {@link #sendFile(File, String)}
* method is called, as it is the only method that actualy transmits the
* file.
*
* @return Returns the amount of bytes that have been sent for the file
* transfer. Or -1 if the file transfer has not started.
*/
public long getBytesSent() {
return amountWritten;
}
private OutputStream negotiateStream(String fileName, long fileSize,
String description) throws XMPPException {
// Negotiate the file transfer profile
if (!updateStatus(Status.initial, Status.negotiating_transfer)) {
throw new XMPPException("Illegal state change");
}
StreamNegotiator streamNegotiator = negotiator.negotiateOutgoingTransfer(
getPeer(), streamID, fileName, fileSize, description,
RESPONSE_TIMEOUT);
if (streamNegotiator == null) {
setStatus(Status.error);
setError(Error.no_response);
return null;
}
// Negotiate the stream
if (!updateStatus(Status.negotiating_transfer, Status.negotiating_stream)) {
throw new XMPPException("Illegal state change");
}
outputStream = streamNegotiator.createOutgoingStream(streamID,
initiator, getPeer());
if (!updateStatus(Status.negotiating_stream, Status.negotiated)) {
throw new XMPPException("Illegal state change");
}
return outputStream;
}
public void cancel() {
setStatus(Status.cancelled);
}
@Override
protected boolean updateStatus(Status oldStatus, Status newStatus) {
boolean isUpdated = super.updateStatus(oldStatus, newStatus);
if(callback != null && isUpdated) {
callback.statusUpdated(oldStatus, newStatus);
}
return isUpdated;
}
@Override
protected void setStatus(Status status) {
Status oldStatus = getStatus();
super.setStatus(status);
if(callback != null) {
callback.statusUpdated(oldStatus, status);
}
}
@Override
protected void setException(Exception exception) {
super.setException(exception);
if(callback != null) {
callback.errorEstablishingStream(exception);
}
}
/**
* A callback class to retrive the status of an outgoing transfer
* negotiation process.
*
* @author Alexander Wenckus
*
*/
public interface NegotiationProgress {
/**
* Called when the status changes
*
* @param oldStatus the previous status of the file transfer.
* @param newStatus the new status of the file transfer.
*/
void statusUpdated(Status oldStatus, Status newStatus);
/**
* Once the negotiation process is completed the output stream can be
* retrieved.
*
* @param stream the established stream which can be used to transfer the file to the remote
* entity
*/
void outputStreamEstablished(OutputStream stream);
/**
* Called when an exception occurs during the negotiation progress.
*
* @param e the exception that occured.
*/
void errorEstablishingStream(Exception e);
}
}

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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.SmackConfiguration;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.filter.AndFilter;
import org.jivesoftware.smack.filter.FromMatchesFilter;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.filter.PacketIDFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.XMPPError;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smackx.packet.Bytestream;
import org.jivesoftware.smackx.packet.Bytestream.StreamHost;
import org.jivesoftware.smackx.packet.Bytestream.StreamHostUsed;
import org.jivesoftware.smackx.packet.StreamInitiation;
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Collection;
import java.util.Iterator;
import java.util.Date;
/**
* A SOCKS5 bytestream is negotiated partly over the XMPP XML stream and partly
* over a seperate socket. The actual transfer though takes place over a
* seperatly created socket.
* <p/>
* A SOCKS5 file transfer generally has three parites, the initiator, the
* target, and the stream host. The stream host is a specialized SOCKS5 proxy
* setup on the server, or, the Initiator can act as the Stream Host if the
* proxy is not available.
* <p/>
* The advantage of having a seperate proxy over directly connecting to
* eachother is if the Initator and the Target are not on the same LAN and are
* operating behind NAT, the proxy allows for a common location for both parties
* to connect to and transfer the file.
* <p/>
* Smack will attempt to automatically discover any proxies present on your
* server. If any are detected they will be forwarded to any user attempting to
* recieve files from you.
*
* @author Alexander Wenckus
* @see <a href="http://www.jabber.org/jeps/jep-0065.html">JEP-0065: SOCKS5
* Bytestreams</a>
*/
public class Socks5TransferNegotiator extends StreamNegotiator {
protected static final String NAMESPACE = "http://jabber.org/protocol/bytestreams";
/**
* The number of connection failures it takes to a streamhost for that particular streamhost
* to be blacklisted. When a host is blacklisted no more connection attempts will be made to
* it for a period of 2 hours.
*/
private static final int CONNECT_FAILURE_THRESHOLD = 2;
public static boolean isAllowLocalProxyHost = true;
private final XMPPConnection connection;
private Socks5TransferNegotiatorManager transferNegotiatorManager;
public Socks5TransferNegotiator(Socks5TransferNegotiatorManager transferNegotiatorManager,
final XMPPConnection connection)
{
this.connection = connection;
this.transferNegotiatorManager = transferNegotiatorManager;
}
public PacketFilter getInitiationPacketFilter(String from, String sessionID) {
return new AndFilter(new FromMatchesFilter(from),
new BytestreamSIDFilter(sessionID));
}
/*
* (non-Javadoc)
*
* @see org.jivesoftware.smackx.filetransfer.StreamNegotiator#initiateDownload(
* org.jivesoftware.smackx.packet.StreamInitiation, java.io.File)
*/
InputStream negotiateIncomingStream(Packet streamInitiation)
throws XMPPException {
Bytestream streamHostsInfo = (Bytestream) streamInitiation;
if (streamHostsInfo.getType().equals(IQ.Type.ERROR)) {
throw new XMPPException(streamHostsInfo.getError());
}
SelectedHostInfo selectedHost;
try {
// select appropriate host
System.out.println(new java.util.Date().toString() + ": Socks5TransferNegotiator>negotiateIncomingStream:115");
selectedHost = selectHost(streamHostsInfo);
System.out.println(new java.util.Date().toString() + ": Socks5TransferNegotiator>negotiateIncomingStream:117");
}
catch (XMPPException ex) {
if (ex.getXMPPError() != null) {
IQ errorPacket = super.createError(streamHostsInfo.getTo(),
streamHostsInfo.getFrom(), streamHostsInfo.getPacketID(),
ex.getXMPPError());
connection.sendPacket(errorPacket);
}
throw (ex);
}
// send used-host confirmation
Bytestream streamResponse = createUsedHostConfirmation(
selectedHost.selectedHost, streamHostsInfo.getFrom(),
streamHostsInfo.getTo(), streamHostsInfo.getPacketID());
connection.sendPacket(streamResponse);
try {
PushbackInputStream stream = new PushbackInputStream(
selectedHost.establishedSocket.getInputStream());
int firstByte = stream.read();
stream.unread(firstByte);
return stream;
}
catch (IOException e) {
throw new XMPPException("Error establishing input stream", e);
}
}
public InputStream createIncomingStream(StreamInitiation initiation) throws XMPPException {
Packet streamInitiation = initiateIncomingStream(connection, initiation);
return negotiateIncomingStream(streamInitiation);
}
/**
* The used host confirmation is sent to the initiator to indicate to them
* which of the hosts they provided has been selected and successfully
* connected to.
*
* @param selectedHost The selected stream host.
* @param initiator The initiator of the stream.
* @param target The target of the stream.
* @param packetID The of the packet being responded to.
* @return The packet that was created to send to the initiator.
*/
private Bytestream createUsedHostConfirmation(StreamHost selectedHost,
String initiator, String target, String packetID) {
Bytestream streamResponse = new Bytestream();
streamResponse.setTo(initiator);
streamResponse.setFrom(target);
streamResponse.setType(IQ.Type.RESULT);
streamResponse.setPacketID(packetID);
streamResponse.setUsedHost(selectedHost.getJID());
return streamResponse;
}
/**
* Selects a host to connect to over which the file will be transmitted.
*
* @param streamHostsInfo the packet recieved from the initiator containing the available hosts
* to transfer the file
* @return the selected host and socket that were created.
* @throws XMPPException when there is no appropriate host.
*/
private SelectedHostInfo selectHost(Bytestream streamHostsInfo)
throws XMPPException {
Iterator it = streamHostsInfo.getStreamHosts().iterator();
StreamHost selectedHost = null;
Socket socket = null;
while (it.hasNext()) {
selectedHost = (StreamHost) it.next();
String address = selectedHost.getAddress();
// Check to see if this address has been blacklisted
int failures = getConnectionFailures(address);
if (failures >= CONNECT_FAILURE_THRESHOLD) {
continue;
}
// establish socket
try {
socket = new Socket(address, selectedHost
.getPort());
establishSOCKS5ConnectionToProxy(socket, createDigest(
streamHostsInfo.getSessionID(), streamHostsInfo
.getFrom(), streamHostsInfo.getTo()));
break;
}
catch (IOException e) {
e.printStackTrace();
incrementConnectionFailures(address);
selectedHost = null;
socket = null;
}
}
if (selectedHost == null || socket == null || !socket.isConnected()) {
String errorMessage = "Could not establish socket with any provided host";
throw new XMPPException(errorMessage, new XMPPError(
XMPPError.Condition.no_acceptable, errorMessage));
}
return new SelectedHostInfo(selectedHost, socket);
}
private void incrementConnectionFailures(String address) {
transferNegotiatorManager.incrementConnectionFailures(address);
}
private int getConnectionFailures(String address) {
return transferNegotiatorManager.getConnectionFailures(address);
}
/**
* Creates the digest needed for a byte stream. It is the SHA1(sessionID +
* initiator + target).
*
* @param sessionID The sessionID of the stream negotiation
* @param initiator The inititator of the stream negotiation
* @param target The target of the stream negotiation
* @return SHA-1 hash of the three parameters
*/
private String createDigest(final String sessionID, final String initiator,
final String target) {
return StringUtils.hash(sessionID + StringUtils.parseName(initiator)
+ "@" + StringUtils.parseServer(initiator) + "/"
+ StringUtils.parseResource(initiator)
+ StringUtils.parseName(target) + "@"
+ StringUtils.parseServer(target) + "/"
+ StringUtils.parseResource(target));
}
/*
* (non-Javadoc)
*
* @see org.jivesoftware.smackx.filetransfer.StreamNegotiator#initiateUpload(java.lang.String,
* org.jivesoftware.smackx.packet.StreamInitiation, java.io.File)
*/
public OutputStream createOutgoingStream(String streamID, String initiator,
String target) throws XMPPException
{
Socket socket;
try {
socket = initBytestreamSocket(streamID, initiator, target);
}
catch (Exception e) {
throw new XMPPException("Error establishing transfer socket", e);
}
if (socket != null) {
try {
return new BufferedOutputStream(socket.getOutputStream());
}
catch (IOException e) {
throw new XMPPException("Error establishing output stream", e);
}
}
return null;
}
private Socket initBytestreamSocket(final String sessionID,
String initiator, String target) throws Exception {
Socks5TransferNegotiatorManager.ProxyProcess process;
try {
process = establishListeningSocket();
}
catch (IOException io) {
process = null;
}
Socket conn;
try {
String localIP;
try {
localIP = discoverLocalIP();
}
catch (UnknownHostException e1) {
localIP = null;
}
Bytestream query = createByteStreamInit(initiator, target, sessionID,
localIP, (process != null ? process.getPort() : 0));
// if the local host is one of the options we need to wait for the
// remote connection.
conn = waitForUsedHostResponse(sessionID, process, createDigest(
sessionID, initiator, target), query).establishedSocket;
}
finally {
cleanupListeningSocket();
}
return conn;
}
/**
* Waits for the peer to respond with which host they chose to use.
*
* @param sessionID The session id of the stream.
* @param proxy The server socket which will listen locally for remote
* connections.
* @param digest the digest of the userids and the session id
* @param query the query which the response is being awaited
* @return the selected host
* @throws XMPPException when the response from the peer is an error or doesn't occur
* @throws IOException when there is an error establishing the local socket
*/
private SelectedHostInfo waitForUsedHostResponse(String sessionID,
final Socks5TransferNegotiatorManager.ProxyProcess proxy, final String digest,
final Bytestream query) throws XMPPException, IOException
{
SelectedHostInfo info = new SelectedHostInfo();
PacketCollector collector = connection
.createPacketCollector(new PacketIDFilter(query.getPacketID()));
connection.sendPacket(query);
Packet packet = collector.nextResult(SmackConfiguration.getPacketReplyTimeout());
collector.cancel();
Bytestream response;
if (packet != null && packet instanceof Bytestream) {
response = (Bytestream) packet;
}
else {
throw new XMPPException("Unexpected response from remote user");
}
// check for an error
if (response.getType().equals(IQ.Type.ERROR)) {
throw new XMPPException("Remote client returned error, stream hosts expected",
response.getError());
}
StreamHostUsed used = response.getUsedHost();
StreamHost usedHost = query.getStreamHost(used.getJID());
if (usedHost == null) {
throw new XMPPException("Remote user responded with unknown host");
}
// The local computer is acting as the proxy
if (used.getJID().equals(query.getFrom())) {
info.establishedSocket = proxy.getSocket(digest);
info.selectedHost = usedHost;
return info;
}
else {
info.establishedSocket = new Socket(usedHost.getAddress(), usedHost
.getPort());
establishSOCKS5ConnectionToProxy(info.establishedSocket, digest);
Bytestream activate = createByteStreamActivate(sessionID, response
.getTo(), usedHost.getJID(), response.getFrom());
collector = connection.createPacketCollector(new PacketIDFilter(
activate.getPacketID()));
connection.sendPacket(activate);
IQ serverResponse = (IQ) collector.nextResult(SmackConfiguration
.getPacketReplyTimeout());
collector.cancel();
if (!serverResponse.getType().equals(IQ.Type.RESULT)) {
info.establishedSocket.close();
return null;
}
return info;
}
}
private Socks5TransferNegotiatorManager.ProxyProcess establishListeningSocket()
throws IOException {
return transferNegotiatorManager.addTransfer();
}
private void cleanupListeningSocket() {
transferNegotiatorManager.removeTransfer();
}
private String discoverLocalIP() throws UnknownHostException {
return InetAddress.getLocalHost().getHostAddress();
}
/**
* The bytestream init looks like this:
* <p/>
* <pre>
* &lt;iq type='set'
* from='initiator@host1/foo'
* to='target@host2/bar'
* id='initiate'&gt;
* &lt;query xmlns='http://jabber.org/protocol/bytestreams'
* sid='mySID'
* mode='tcp'&gt;
* &lt;streamhost
* jid='initiator@host1/foo'
* host='192.168.4.1'
* port='5086'/&gt;
* &lt;streamhost
* jid='proxy.host3'
* host='24.24.24.1'
* zeroconf='_jabber.bytestreams'/&gt;
* &lt;/query&gt;
* &lt;/iq&gt;
* </pre>
*
* @param from initiator@host1/foo - the file transfer initiator.
* @param to target@host2/bar - the file transfer target.
* @param sid 'mySID' - the unique identifier for this file transfer
* @param localIP the IP of the local machine if it is being provided, null otherwise.
* @param port the port of the local mahine if it is being provided, null otherwise.
* @return the created <b><i>Bytestream</b></i> packet
*/
private Bytestream createByteStreamInit(final String from, final String to,
final String sid, final String localIP, final int port)
{
Bytestream bs = new Bytestream();
bs.setTo(to);
bs.setFrom(from);
bs.setSessionID(sid);
bs.setType(IQ.Type.SET);
bs.setMode(Bytestream.Mode.tcp);
if (localIP != null && port > 0) {
bs.addStreamHost(from, localIP, port);
}
// make sure the proxies have been initialized completely
Collection<Bytestream.StreamHost> streamHosts = transferNegotiatorManager.getStreamHosts();
if (streamHosts != null) {
for (StreamHost host : streamHosts) {
bs.addStreamHost(host);
}
}
return bs;
}
/**
* Returns the packet to send notification to the stream host to activate
* the stream.
*
* @param sessionID the session ID of the file transfer to activate.
* @param from the sender of the bytestreeam
* @param to the JID of the stream host
* @param target the JID of the file transfer target.
* @return the packet to send notification to the stream host to
* activate the stream.
*/
private static Bytestream createByteStreamActivate(final String sessionID,
final String from, final String to, final String target)
{
Bytestream activate = new Bytestream(sessionID);
activate.setMode(null);
activate.setToActivate(target);
activate.setFrom(from);
activate.setTo(to);
activate.setType(IQ.Type.SET);
return activate;
}
public String[] getNamespaces() {
return new String[]{NAMESPACE};
}
private void establishSOCKS5ConnectionToProxy(Socket socket, String digest)
throws IOException {
byte[] cmd = new byte[3];
cmd[0] = (byte) 0x05;
cmd[1] = (byte) 0x01;
cmd[2] = (byte) 0x00;
OutputStream out = new DataOutputStream(socket.getOutputStream());
out.write(cmd);
InputStream in = new DataInputStream(socket.getInputStream());
byte[] response = new byte[2];
in.read(response);
cmd = createOutgoingSocks5Message(1, digest);
out.write(cmd);
createIncomingSocks5Message(in);
}
static String createIncomingSocks5Message(InputStream in)
throws IOException {
byte[] cmd = new byte[5];
in.read(cmd, 0, 5);
byte[] addr = new byte[cmd[4]];
in.read(addr, 0, addr.length);
String digest = new String(addr);
in.read();
in.read();
return digest;
}
static byte[] createOutgoingSocks5Message(int cmd, String digest) {
byte addr[] = digest.getBytes();
byte[] data = new byte[7 + addr.length];
data[0] = (byte) 5;
data[1] = (byte) cmd;
data[2] = (byte) 0;
data[3] = (byte) 0x3;
data[4] = (byte) addr.length;
System.arraycopy(addr, 0, data, 5, addr.length);
data[data.length - 2] = (byte) 0;
data[data.length - 1] = (byte) 0;
return data;
}
public void cleanup() {
}
private static class SelectedHostInfo {
protected XMPPException exception;
protected StreamHost selectedHost;
protected Socket establishedSocket;
SelectedHostInfo(StreamHost selectedHost, Socket establishedSocket) {
this.selectedHost = selectedHost;
this.establishedSocket = establishedSocket;
}
public SelectedHostInfo() {
}
}
private static class BytestreamSIDFilter implements PacketFilter {
private String sessionID;
public BytestreamSIDFilter(String sessionID) {
if (sessionID == null) {
throw new IllegalArgumentException("StreamID cannot be null");
}
this.sessionID = sessionID;
}
public boolean accept(Packet packet) {
if (!Bytestream.class.isInstance(packet)) {
return false;
}
Bytestream bytestream = (Bytestream) packet;
String sessionID = bytestream.getSessionID();
return (sessionID != null && sessionID.equals(this.sessionID));
}
}
}

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/**
* $Revision:$
* $Date:$
*
* Copyright 2003-2007 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.util.Cache;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.SmackConfiguration;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.filter.PacketIDFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smackx.ServiceDiscoveryManager;
import org.jivesoftware.smackx.packet.DiscoverItems;
import org.jivesoftware.smackx.packet.Bytestream;
import org.jivesoftware.smackx.packet.DiscoverInfo;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.SocketTimeoutException;
import java.util.*;
import java.io.*;
/**
*
*/
public class Socks5TransferNegotiatorManager implements FileTransferNegotiatorManager {
private static final long BLACKLIST_LIFETIME = 60 * 1000 * 120;
// locks the proxies during their initialization process
private final Object proxyLock = new Object();
private static ProxyProcess proxyProcess;
// locks on the proxy process during its initiatilization process
private final Object processLock = new Object();
private final Cache<String, Integer> addressBlacklist
= new Cache<String, Integer>(100, BLACKLIST_LIFETIME);
private XMPPConnection connection;
private List<String> proxies;
private List<Bytestream.StreamHost> streamHosts;
public Socks5TransferNegotiatorManager(XMPPConnection connection) {
this.connection = connection;
}
public StreamNegotiator createNegotiator() {
return new Socks5TransferNegotiator(this, connection);
}
public void incrementConnectionFailures(String address) {
Integer count = addressBlacklist.get(address);
if (count == null) {
count = 1;
}
else {
count += 1;
}
addressBlacklist.put(address, count);
}
public int getConnectionFailures(String address) {
Integer count = addressBlacklist.get(address);
return count != null ? count : 0;
}
public ProxyProcess addTransfer() throws IOException {
synchronized (processLock) {
if (proxyProcess == null) {
proxyProcess = new ProxyProcess(new ServerSocket(7777));
proxyProcess.start();
}
}
proxyProcess.addTransfer();
return proxyProcess;
}
public void removeTransfer() {
if (proxyProcess == null) {
return;
}
proxyProcess.removeTransfer();
}
public Collection<Bytestream.StreamHost> getStreamHosts() {
synchronized (proxyLock) {
if (proxies == null) {
initProxies();
}
}
return Collections.unmodifiableCollection(streamHosts);
}
/**
* Checks the service discovery item returned from a server component to verify if it is
* a File Transfer proxy or not.
*
* @param manager the service discovery manager which will be used to query the component
* @param item the discovered item on the server relating
* @return returns the JID of the proxy if it is a proxy or null if the item is not a proxy.
*/
private String checkIsProxy(ServiceDiscoveryManager manager, DiscoverItems.Item item) {
DiscoverInfo info;
try {
info = manager.discoverInfo(item.getEntityID());
}
catch (XMPPException e) {
return null;
}
Iterator itx = info.getIdentities();
while (itx.hasNext()) {
DiscoverInfo.Identity identity = (DiscoverInfo.Identity) itx.next();
if ("proxy".equalsIgnoreCase(identity.getCategory())
&& "bytestreams".equalsIgnoreCase(
identity.getType())) {
return info.getFrom();
}
}
return null;
}
private void initProxies() {
proxies = new ArrayList<String>();
ServiceDiscoveryManager manager = ServiceDiscoveryManager
.getInstanceFor(connection);
try {
DiscoverItems discoItems = manager.discoverItems(connection.getServiceName());
Iterator it = discoItems.getItems();
while (it.hasNext()) {
DiscoverItems.Item item = (DiscoverItems.Item) it.next();
String proxy = checkIsProxy(manager, item);
if (proxy != null) {
proxies.add(proxy);
}
}
}
catch (XMPPException e) {
return;
}
if (proxies.size() > 0) {
initStreamHosts();
}
}
/**
* Loads streamhost address and ports from the proxies on the local server.
*/
private void initStreamHosts() {
List<Bytestream.StreamHost> streamHosts = new ArrayList<Bytestream.StreamHost>();
Iterator it = proxies.iterator();
IQ query;
PacketCollector collector;
Bytestream response;
while (it.hasNext()) {
String jid = it.next().toString();
query = new IQ() {
public String getChildElementXML() {
return "<query xmlns=\"http://jabber.org/protocol/bytestreams\"/>";
}
};
query.setType(IQ.Type.GET);
query.setTo(jid);
collector = connection.createPacketCollector(new PacketIDFilter(
query.getPacketID()));
connection.sendPacket(query);
response = (Bytestream) collector.nextResult(SmackConfiguration
.getPacketReplyTimeout());
if (response != null) {
streamHosts.addAll(response.getStreamHosts());
}
collector.cancel();
}
this.streamHosts = streamHosts;
}
public void cleanup() {
synchronized (processLock) {
if (proxyProcess != null) {
proxyProcess.stop();
proxyProcess = null;
}
}
}
class ProxyProcess implements Runnable {
private final ServerSocket listeningSocket;
private final Map<String, Socket> connectionMap = new HashMap<String, Socket>();
private boolean done = false;
private Thread thread;
private int transfers;
public void run() {
try {
try {
listeningSocket.setSoTimeout(10000);
}
catch (SocketException e) {
// There was a TCP error, lets print the stack trace
e.printStackTrace();
return;
}
while (!done) {
Socket conn = null;
synchronized (ProxyProcess.this) {
while (transfers <= 0 && !done) {
transfers = -1;
try {
ProxyProcess.this.wait();
}
catch (InterruptedException e) {
/* Do nothing */
}
}
}
if (done) {
break;
}
try {
synchronized (listeningSocket) {
conn = listeningSocket.accept();
}
if (conn == null) {
continue;
}
String digest = establishSocks5UploadConnection(conn);
synchronized (connectionMap) {
connectionMap.put(digest, conn);
}
}
catch (SocketTimeoutException e) {
/* Do Nothing */
}
catch (IOException e) {
/* Do Nothing */
}
catch (XMPPException e) {
e.printStackTrace();
if (conn != null) {
try {
conn.close();
}
catch (IOException e1) {
/* Do Nothing */
}
}
}
}
}
finally {
try {
listeningSocket.close();
}
catch (IOException e) {
/* Do Nothing */
}
}
}
/**
* Negotiates the Socks 5 bytestream when the local computer is acting as
* the proxy.
*
* @param connection the socket connection with the peer.
* @return the SHA-1 digest that is used to uniquely identify the file
* transfer.
* @throws XMPPException
* @throws IOException
*/
private String establishSocks5UploadConnection(Socket connection) throws XMPPException, IOException {
OutputStream out = new DataOutputStream(connection.getOutputStream());
InputStream in = new DataInputStream(connection.getInputStream());
// first byte is version should be 5
int b = in.read();
if (b != 5) {
throw new XMPPException("Only SOCKS5 supported");
}
// second byte number of authentication methods supported
b = in.read();
int[] auth = new int[b];
for (int i = 0; i < b; i++) {
auth[i] = in.read();
}
int authMethod = -1;
for (int anAuth : auth) {
authMethod = (anAuth == 0 ? 0 : -1); // only auth method
// 0, no
// authentication,
// supported
if (authMethod == 0) {
break;
}
}
if (authMethod != 0) {
throw new XMPPException("Authentication method not supported");
}
byte[] cmd = new byte[2];
cmd[0] = (byte) 0x05;
cmd[1] = (byte) 0x00;
out.write(cmd);
String responseDigest = Socks5TransferNegotiator.createIncomingSocks5Message(in);
cmd = Socks5TransferNegotiator.createOutgoingSocks5Message(0, responseDigest);
if (!connection.isConnected()) {
throw new XMPPException("Socket closed by remote user");
}
out.write(cmd);
return responseDigest;
}
public void start() {
thread.start();
}
public void stop() {
done = true;
synchronized (this) {
this.notify();
}
synchronized (listeningSocket) {
listeningSocket.notify();
}
}
public int getPort() {
return listeningSocket.getLocalPort();
}
ProxyProcess(ServerSocket listeningSocket) {
thread = new Thread(this, "File Transfer Connection Listener");
this.listeningSocket = listeningSocket;
}
public Socket getSocket(String digest) {
synchronized (connectionMap) {
return connectionMap.get(digest);
}
}
public void addTransfer() {
synchronized (this) {
if (transfers == -1) {
transfers = 1;
this.notify();
}
else {
transfers++;
}
}
}
public void removeTransfer() {
synchronized (this) {
transfers--;
}
}
}
}

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/**
* $RCSfile$
* $Revision: $
* $Date: $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.SmackConfiguration;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.XMPPError;
import org.jivesoftware.smackx.Form;
import org.jivesoftware.smackx.FormField;
import org.jivesoftware.smackx.packet.DataForm;
import org.jivesoftware.smackx.packet.StreamInitiation;
import java.io.InputStream;
import java.io.OutputStream;
/**
* After the file transfer negotiation process is completed according to
* JEP-0096, the negotation process is passed off to a particular stream
* negotiator. The stream negotiator will then negotiate the chosen stream and
* return the stream to transfer the file.
*
* @author Alexander Wenckus
*/
public abstract class StreamNegotiator {
/**
* Creates the initiation acceptance packet to forward to the stream
* initiator.
*
* @param streamInitiationOffer The offer from the stream initatior to connect for a stream.
* @param namespaces The namespace that relates to the accepted means of transfer.
* @return The response to be forwarded to the initator.
*/
public StreamInitiation createInitiationAccept(
StreamInitiation streamInitiationOffer, String[] namespaces)
{
StreamInitiation response = new StreamInitiation();
response.setTo(streamInitiationOffer.getFrom());
response.setFrom(streamInitiationOffer.getTo());
response.setType(IQ.Type.RESULT);
response.setPacketID(streamInitiationOffer.getPacketID());
DataForm form = new DataForm(Form.TYPE_SUBMIT);
FormField field = new FormField(
FileTransferNegotiator.STREAM_DATA_FIELD_NAME);
for (String namespace : namespaces) {
field.addValue(namespace);
}
form.addField(field);
response.setFeatureNegotiationForm(form);
return response;
}
public IQ createError(String from, String to, String packetID, XMPPError xmppError) {
IQ iq = FileTransferNegotiator.createIQ(packetID, to, from, IQ.Type.ERROR);
iq.setError(xmppError);
return iq;
}
Packet initiateIncomingStream(XMPPConnection connection, StreamInitiation initiation) throws XMPPException {
StreamInitiation response = createInitiationAccept(initiation,
getNamespaces());
// establish collector to await response
PacketCollector collector = connection
.createPacketCollector(getInitiationPacketFilter(initiation.getFrom(), initiation.getSessionID()));
connection.sendPacket(response);
Packet streamMethodInitiation = collector
.nextResult(SmackConfiguration.getPacketReplyTimeout());
collector.cancel();
if (streamMethodInitiation == null) {
throw new XMPPException("No response from file transfer initiator");
}
return streamMethodInitiation;
}
/**
* Returns the packet filter that will return the initiation packet for the appropriate stream
* initiation.
*
* @param from The initiatior of the file transfer.
* @param streamID The stream ID related to the transfer.
* @return The <b><i>PacketFilter</b></i> that will return the packet relatable to the stream
* initiation.
*/
public abstract PacketFilter getInitiationPacketFilter(String from, String streamID);
abstract InputStream negotiateIncomingStream(Packet streamInitiation) throws XMPPException;
/**
* This method handles the file stream download negotiation process. The
* appropriate stream negotiator's initiate incoming stream is called after
* an appropriate file transfer method is selected. The manager will respond
* to the initatior with the selected means of transfer, then it will handle
* any negotation specific to the particular transfer method. This method
* returns the InputStream, ready to transfer the file.
*
* @param initiation The initation that triggered this download.
* @return After the negotation process is complete, the InputStream to
* write a file to is returned.
* @throws XMPPException If an error occurs during this process an XMPPException is
* thrown.
*/
public abstract InputStream createIncomingStream(StreamInitiation initiation) throws XMPPException;
/**
* This method handles the file upload stream negotiation process. The
* particular stream negotiator is determined during the file transfer
* negotiation process. This method returns the OutputStream to transmit the
* file to the remote user.
*
* @param streamID The streamID that uniquely identifies the file transfer.
* @param initiator The fully-qualified JID of the initiator of the file transfer.
* @param target The fully-qualified JID of the target or reciever of the file
* transfer.
* @return The negotiated stream ready for data.
* @throws XMPPException If an error occurs during the negotiation process an
* exception will be thrown.
*/
public abstract OutputStream createOutgoingStream(String streamID,
String initiator, String target) throws XMPPException;
/**
* Returns the XMPP namespace reserved for this particular type of file
* transfer.
*
* @return Returns the XMPP namespace reserved for this particular type of
* file transfer.
*/
public abstract String[] getNamespaces();
/**
* Cleanup any and all resources associated with this negotiator.
*/
public abstract void cleanup();
}