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Code Issues Releases Wiki Activity

Fix Carbon Listener setup

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We can't always setup the carbons listener in the constructor of the
manager, as the our local XMPP address may not be available yet. So
setup the carbons listener on a connection listener *and* in the
constructor.
This commit is contained in:
Florian Schmaus 2017-02-01 10:59:44 +01:00
parent 872b254db5
commit 684d33b773
1 changed files with 48 additions and 27 deletions
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75
smack-experimental/src/main/java/org/jivesoftware/smackx/carbons/CarbonManager.java
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@ -21,15 +21,15 @@ import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
import org.jivesoftware.smack.ExceptionCallback;
import org.jivesoftware.smack.AbstractConnectionListener;
import org.jivesoftware.smack.ConnectionCreationListener;
import org.jivesoftware.smack.ExceptionCallback;
import org.jivesoftware.smack.Manager;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.ConnectionCreationListener;
import org.jivesoftware.smack.Manager;
import org.jivesoftware.smack.StanzaListener;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPConnectionRegistry;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
@ -42,12 +42,13 @@ import org.jivesoftware.smack.filter.StanzaTypeFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smackx.carbons.packet.CarbonExtension;
import org.jivesoftware.smackx.carbons.packet.Carbon;
import org.jivesoftware.smackx.carbons.packet.CarbonExtension;
import org.jivesoftware.smackx.carbons.packet.CarbonExtension.Direction;
import org.jivesoftware.smackx.carbons.packet.CarbonExtension.Private;
import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
import org.jivesoftware.smackx.forward.packet.Forwarded;
import org.jxmpp.jid.EntityFullJid;
/**
* Manager for XEP-0280: Message Carbons. This class implements the manager for registering {@link CarbonExtension}
@ -92,28 +93,14 @@ public final class CarbonManager extends Manager {
private volatile boolean enabled_state = false;
private final StanzaListener carbonsListener;
private CarbonManager(XMPPConnection connection) {
super(connection);
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
sdm.addFeature(CarbonExtension.NAMESPACE);
connection.addConnectionListener(new AbstractConnectionListener() {
@Override
public void connectionClosed() {
// Reset the state if the connection was cleanly closed. Note that this is not strictly necessary,
// because we also reset in authenticated() if the stream got not resumed, but for maximum correctness,
// also reset here.
enabled_state = false;
}
@Override
public void authenticated(XMPPConnection connection, boolean resumed) {
if (!resumed) {
// Non-resumed XMPP sessions always start with disabled carbons
enabled_state = false;
}
}
});
connection.addSyncStanzaListener(new StanzaListener() {
carbonsListener = new StanzaListener() {
@Override
public void processStanza(final Stanza stanza) throws NotConnectedException, InterruptedException {
final Message wrappingMessage = (Message) stanza;
@ -125,11 +112,45 @@ public final class CarbonManager extends Manager {
listener.onCarbonCopyReceived(direction, carbonCopy, wrappingMessage);
}
}
// XEP-0280 § 11. Security Considerations "Any forwarded copies received by a Carbons-enabled client MUST be
// from that user's bare JID; any copies that do not meet this requirement MUST be ignored." Otherwise, if
// those copies do not get ignored, malicious users may be able to impersonate other users. That is why the
// 'from' matcher is important here.
}, new AndFilter(CARBON_EXTENSION_FILTER, FromMatchesFilter.createBare(connection.getUser())));
};
connection.addConnectionListener(new AbstractConnectionListener() {
@Override
public void connectionClosed() {
// Reset the state if the connection was cleanly closed. Note that this is not strictly necessary,
// because we also reset in authenticated() if the stream got not resumed, but for maximum correctness,
// also reset here.
enabled_state = false;
boolean removed = connection().removeSyncStanzaListener(carbonsListener);
assert(removed);
}
@Override
public void authenticated(XMPPConnection connection, boolean resumed) {
if (!resumed) {
// Non-resumed XMPP sessions always start with disabled carbons
enabled_state = false;
}
addCarbonsListener(connection);
}
});
addCarbonsListener(connection);
}
private void addCarbonsListener(XMPPConnection connection) {
EntityFullJid localAddress = connection.getUser();
if (localAddress == null) {
// We where not connected yet and thus we don't know our XMPP address at the moment, which we need to match incoming
// carbons securely. Abort here. The ConnectionListener above will eventually setup the carbons listener.
return;
}
// XEP-0280 § 11. Security Considerations "Any forwarded copies received by a Carbons-enabled client MUST be
// from that user's bare JID; any copies that do not meet this requirement MUST be ignored." Otherwise, if
// those copies do not get ignored, malicious users may be able to impersonate other users. That is why the
// 'from' matcher is important here.
connection.addSyncStanzaListener(carbonsListener, new AndFilter(CARBON_EXTENSION_FILTER,
FromMatchesFilter.createBare(localAddress)));
}
/**