/**
* Get the port of the current STUN server.
*
* @return the port of the STUN server
*/
public int getCurrentServerPort() {
if (!currentServer.isNull()) {
return currentServer.getPort();
} else {
return 0;
}
}
/**
* Get the name of the current STUN server.
*
* @return the name of the STUN server
*/
public String getCurrentServerName() {
if (!currentServer.isNull()) {
return currentServer.getHostname();
} else {
return null;
}
}
/**
* Initialize the resolver.
*
* @throws XMPPException
*/
@Override
public void initialize() throws XMPPException {
LOGGER.debug("Initialized");
if (!isResolving() && !isResolved()) {
// Get the best STUN server available
if (currentServer.isNull()) {
loadSTUNServers();
}
// We should have a valid STUN server by now...
if (!currentServer.isNull()) {
clearCandidates();
resolverThread =
new Thread(
new Runnable() {
@Override
public void run() {
// Iterate through the list of interfaces, and ask
// to the STUN server for our address.
try {
final Enumeration ifaces = NetworkInterface.getNetworkInterfaces();
String candAddress;
int candPort;
while (ifaces.hasMoreElements()) {
final NetworkInterface iface = (NetworkInterface) ifaces.nextElement();
final Enumeration iaddresses = iface.getInetAddresses();
while (iaddresses.hasMoreElements()) {
final InetAddress iaddress = (InetAddress) iaddresses.nextElement();
if (!iaddress.isLoopbackAddress() && !iaddress.isLinkLocalAddress()) {
// Reset the candidate
candAddress = null;
candPort = -1;
final DiscoveryTest test =
new DiscoveryTest(
iaddress, currentServer.getHostname(), currentServer.getPort());
try {
// Run the tests and get the
// discovery
// information, where all the
// info is stored...
final DiscoveryInfo di = test.test();
candAddress =
di.getPublicIP() != null
? di.getPublicIP().getHostAddress()
: null;
// Get a valid port
if (defaultPort == 0) {
candPort = getFreePort();
} else {
candPort = defaultPort;
}
// If we have a valid candidate,
// add it to the list.
if (candAddress != null && candPort >= 0) {
final TransportCandidate candidate =
new TransportCandidate.Fixed(candAddress, candPort);
candidate.setLocalIp(
iaddress.getHostAddress() != null
? iaddress.getHostAddress()
: iaddress.getHostName());
addCandidate(candidate);
resolvedPublicIP = candidate.getIp();
resolvedLocalIP = candidate.getLocalIp();
return;
}
} catch (final Exception e) {
LOGGER.error(e.getMessage(), e);
}
}
}
}
} catch (final SocketException e) {
LOGGER.error(e.getMessage(), e);
} finally {
setInitialized();
}
}
},
"Waiting for all the transport candidates checks...");
resolverThread.setName("STUN resolver");
resolverThread.start();
} else {
throw new IllegalStateException("No valid STUN server found.");
}
}
}
