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Code Issues Releases Wiki Activity

Improve Socks5 Bytestreams

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- determine all local IPv4 and IPv6 addresses
- prevent loopback addresses from appearing as streamhost

Some unit tests where changed because they assumed that a host only has
one local address. But nowadays hosts often have more, at least because
they are IPv4 and IPv6 multi-homed.
This commit is contained in:
Florian Schmaus 2014-08-19 18:21:07 +02:00
parent 650da55b23
commit b468a29881
5 changed files with 82 additions and 45 deletions
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32
smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5BytestreamManager.java
View file

@ -652,26 +652,36 @@ public final class Socks5BytestreamManager implements BytestreamManager {
// get local proxy singleton
Socks5Proxy socks5Server = Socks5Proxy.getSocks5Proxy();
if (socks5Server.isRunning()) {
if (!socks5Server.isRunning()) {
// server is not running
return null;
}
List<String> addresses = socks5Server.getLocalAddresses();
int port = socks5Server.getPort();
if (addresses.isEmpty()) {
// local address could not be determined
return null;
}
final int port = socks5Server.getPort();
if (addresses.size() >= 1) {
List<StreamHost> streamHosts = new ArrayList<StreamHost>();
for (String address : addresses) {
StreamHost streamHost = new StreamHost(this.connection.getUser(), address);
outerloop: for (String address : addresses) {
// Prevent loopback addresses from appearing as streamhost
final String[] loopbackAddresses = { "127.0.0.1", "0:0:0:0:0:0:0:1" };
for (String loopbackAddress : loopbackAddresses) {
// Use 'startsWith' here since IPv6 addresses may have scope ID,
// ie. the part after the '%' sign.
if (address.startsWith(loopbackAddress)) {
continue outerloop;
}
}
StreamHost streamHost = new StreamHost(this.connection.getUser(),
address);
streamHost.setPort(port);
streamHosts.add(streamHost);
}
return streamHosts;
}
}
// server is not running or local address could not be determined
return null;
}
/**
* Returns a SOCKS5 Bytestream initialization request packet with the given session ID
* containing the given stream hosts for the given target JID.

63
smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5Proxy.java
View file

@ -20,12 +20,14 @@ import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
@ -47,7 +49,7 @@ import org.jivesoftware.smack.SmackException;
* <p>
* If your application is running on a machine with multiple network interfaces or if you want to
* provide your public address in case you are behind a NAT router, invoke
* {@link #addLocalAddress(String)} or {@link #replaceLocalAddresses(List)} to modify the list of
* {@link #addLocalAddress(String)} or {@link #replaceLocalAddresses(Collection)} to modify the list of
* local network addresses used for outgoing SOCKS5 Bytestream requests.
* <p>
* The local SOCKS5 proxy server refuses all connections except the ones that are explicitly allowed
@ -95,7 +97,7 @@ public class Socks5Proxy {
/* list of digests connections should be stored */
private final List<String> allowedConnections = Collections.synchronizedList(new LinkedList<String>());
private final Set<String> localAddresses = Collections.synchronizedSet(new LinkedHashSet<String>());
private final Set<String> localAddresses = new LinkedHashSet<String>(4);
/**
* Private constructor.
@ -103,14 +105,27 @@ public class Socks5Proxy {
private Socks5Proxy() {
this.serverProcess = new Socks5ServerProcess();
// add default local address
Enumeration<NetworkInterface> networkInterfaces;
try {
this.localAddresses.add(InetAddress.getLocalHost().getHostAddress());
networkInterfaces = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
throw new IllegalStateException(e);
}
catch (UnknownHostException e) {
// do nothing
Set<String> localHostAddresses = new HashSet<String>();
for (NetworkInterface networkInterface : Collections.list(networkInterfaces)) {
// We can't use NetworkInterface.getInterfaceAddresses here, which
// would return a List instead the deprecated Enumeration, because
// it's Android API 9 and Smack currently uses 8. Change that when
// we raise Smack's minimum Android API.
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
for (InetAddress address : Collections.list(inetAddresses)) {
localHostAddresses.add(address.getHostAddress());
}
}
if (localHostAddresses.isEmpty()) {
throw new IllegalStateException("Could not determine any local host address");
}
replaceLocalAddresses(localHostAddresses);
}
/**
@ -243,35 +258,42 @@ public class Socks5Proxy {
* <p>
* Note that the list of addresses initially contains the address returned by
* <code>InetAddress.getLocalHost().getHostAddress()</code>. You can replace the list of
* addresses by invoking {@link #replaceLocalAddresses(List)}.
* addresses by invoking {@link #replaceLocalAddresses(Collection)}.
*
* @param address the local network address to add
*/
public void addLocalAddress(String address) {
if (address == null) {
throw new IllegalArgumentException("address may not be null");
return;
}
synchronized (localAddresses) {
this.localAddresses.add(address);
}
}
/**
* Removes the given address from the list of local network addresses. This address will then no
* longer be used of outgoing SOCKS5 Bytestream requests.
*
* @param address the local network address to remove
* @return true if the address was removed.
*/
public void removeLocalAddress(String address) {
this.localAddresses.remove(address);
public boolean removeLocalAddress(String address) {
synchronized(localAddresses) {
return localAddresses.remove(address);
}
}
/**
* Returns an unmodifiable list of the local network addresses that will be used for streamhost
* Returns an set of the local network addresses that will be used for streamhost
* candidates of outgoing SOCKS5 Bytestream requests.
*
* @return unmodifiable list of the local network addresses
* @return set of the local network addresses
*/
public List<String> getLocalAddresses() {
return Collections.unmodifiableList(new ArrayList<String>(this.localAddresses));
synchronized (localAddresses) {
return new LinkedList<String>(localAddresses);
}
}
/**
@ -284,13 +306,14 @@ public class Socks5Proxy {
*
* @param addresses the new list of local network addresses
*/
public void replaceLocalAddresses(List<String> addresses) {
public void replaceLocalAddresses(Collection<String> addresses) {
if (addresses == null) {
throw new IllegalArgumentException("list must not be null");
}
this.localAddresses.clear();
this.localAddresses.addAll(addresses);
synchronized(localAddresses) {
localAddresses.clear();
localAddresses.addAll(addresses);
}
}
/**

5
smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/packet/Bytestream.java
View file

@ -17,7 +17,6 @@
package org.jivesoftware.smackx.bytestreams.socks5.packet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
@ -145,8 +144,8 @@ public class Bytestream extends IQ {
*
* @return Returns the list of stream hosts contained in the packet.
*/
public Collection<StreamHost> getStreamHosts() {
return Collections.unmodifiableCollection(streamHosts);
public List<StreamHost> getStreamHosts() {
return Collections.unmodifiableList(streamHosts);
}
/**

5
smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5ByteStreamManagerTest.java
View file

@ -799,10 +799,9 @@ public class Socks5ByteStreamManagerTest {
public void verify(Bytestream request, Bytestream response) {
assertEquals(response.getSessionID(), request.getSessionID());
assertEquals(2, request.getStreamHosts().size());
StreamHost streamHost1 = (StreamHost) request.getStreamHosts().toArray()[0];
StreamHost streamHost1 = request.getStreamHosts().get(0);
assertEquals(response.getUsedHost().getJID(), streamHost1.getJID());
StreamHost streamHost2 = (StreamHost) request.getStreamHosts().toArray()[1];
StreamHost streamHost2 = request.getStreamHosts().get(request.getStreamHosts().size() - 1);
assertEquals(response.getUsedHost().getJID(), streamHost2.getJID());
assertEquals("localAddress", streamHost2.getAddress());
}

10
smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5ProxyTest.java
View file

@ -30,6 +30,7 @@ import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.After;
@ -144,7 +145,13 @@ public class Socks5ProxyTest {
proxy.addLocalAddress("same");
proxy.addLocalAddress("same");
assertEquals(2, proxy.getLocalAddresses().size());
int sameCount = 0;
for(String localAddress : proxy.getLocalAddresses()) {
if ("same".equals(localAddress)) {
sameCount++;
}
}
assertEquals(1, sameCount);
}
/**
@ -297,7 +304,6 @@ public class Socks5ProxyTest {
proxy.start();
assertTrue(proxy.isRunning());
String digest = new String(new byte[] { (byte) 0xAA });
// add digest to allow connection