/**
* Initializes and binds a socket that on a random port number. The method would try to bind on a
* random port and retry 5 times until a free port is found.
*
* @return the socket that we have initialized on a randomport number.
*/
private DatagramSocket initRandomPortSocket() {
DatagramSocket resultSocket = null;
String bindRetriesStr =
NetaddrActivator.getConfigurationService().getString(BIND_RETRIES_PROPERTY_NAME);
int bindRetries = 5;
if (bindRetriesStr != null) {
try {
bindRetries = Integer.parseInt(bindRetriesStr);
} catch (NumberFormatException ex) {
logger.error(
bindRetriesStr
+ " does not appear to be an integer. "
+ "Defaulting port bind retries to "
+ bindRetries,
ex);
}
}
int currentlyTriedPort = NetworkUtils.getRandomPortNumber();
// we'll first try to bind to a random port. if this fails we'll try
// again (bindRetries times in all) until we find a free local port.
for (int i = 0; i < bindRetries; i++) {
try {
resultSocket = new DatagramSocket(currentlyTriedPort);
// we succeeded - break so that we don't try to bind again
break;
} catch (SocketException exc) {
if (exc.getMessage().indexOf("Address already in use") == -1) {
logger.fatal(
"An exception occurred while trying to create" + "a local host discovery socket.",
exc);
resultSocket = null;
return null;
}
// port seems to be taken. try another one.
logger.debug("Port " + currentlyTriedPort + " seems in use.");
currentlyTriedPort = NetworkUtils.getRandomPortNumber();
logger.debug("Retrying bind on port " + currentlyTriedPort);
}
}
return resultSocket;
}
/**
* Sends local candidate addresses from the local peer to the remote peer using the
* <tt>candidates</tt> {@link SessionIQ}.
*
* @param candidates the local candidate addresses to be sent from the local peer to the remote
* peer using the <tt>candidates</tt> {@link SessionIQ}
*/
protected void sendCandidates(Iterable<GTalkCandidatePacketExtension> candidates) {
ProtocolProviderServiceJabberImpl protocolProvider = getProtocolProvider();
SessionIQ candidatesIQ = new SessionIQ();
candidatesIQ.setGTalkType(GTalkType.CANDIDATES);
candidatesIQ.setFrom(protocolProvider.getOurJID());
candidatesIQ.setInitiator(isInitiator() ? getAddress() : protocolProvider.getOurJID());
candidatesIQ.setID(getSID());
candidatesIQ.setTo(getAddress());
candidatesIQ.setType(IQ.Type.SET);
for (GTalkCandidatePacketExtension candidate : candidates) {
// Android phone and Google Talk client does not seems to like IPv6
// candidates since it reject the IQ candidates with an error
// so do not send IPv6 candidates to Android phone or Talk client
if (isAndroidOrVtokOrTalkClient(getAddress())
&& NetworkUtils.isIPv6Address(candidate.getAddress())) continue;
candidatesIQ.addExtension(candidate);
}
protocolProvider.getConnection().sendPacket(candidatesIQ);
}
/**
* Returns the Google Contacts connection.
*
* @return Google Contacts connection
*/
public GoogleContactsConnectionImpl getConnection() {
int s = login.indexOf('@');
boolean isGoogleAppsOrGmail = false;
if (s == -1) {
return null;
}
String domain = login.substring((s + 1));
try {
SRVRecord srvRecords[] = NetworkUtils.getSRVRecords("xmpp-client", "tcp", domain);
if (srvRecords != null) {
// To detect that account is a google ones, we try following:
// - lookup in SRV and see if it is google.com;
// - if the account has been created with GoogleTalk form;
// - if it is an "external" google contact.
// SRV checks
for (SRVRecord srv : srvRecords) {
if (srv.getTarget().endsWith("google.com") || srv.getTarget().endsWith("google.com.")) {
isGoogleAppsOrGmail = true;
break;
}
}
}
// GoogleTalk based account or external Google Contacts ?
if (!isGoogleAppsOrGmail) {
isGoogleAppsOrGmail = googleTalk;
}
if (isGoogleAppsOrGmail) {
if (cnx == null) {
cnx = new GoogleContactsConnectionImpl(login, password);
if (cnx.connect()
== GoogleContactsConnection.ConnectionStatus.ERROR_INVALID_CREDENTIALS) {
synchronized (this) {
if (settings != null) {
cnx = null;
return null;
} else {
settings = new AccountSettingsForm();
}
}
settings.setModal(true);
settings.loadData(cnx);
int ret = settings.showDialog();
if (ret == 1) {
cnx = settings.getConnection();
GoogleContactsActivator.getGoogleContactsService().saveConfig(cnx);
} else {
cnx = null;
}
}
} else if (cnx.connect()
== GoogleContactsConnection.ConnectionStatus.ERROR_INVALID_CREDENTIALS) {
synchronized (this) {
if (settings != null) {
cnx = null;
return null;
} else {
settings = new AccountSettingsForm();
}
}
settings.setModal(true);
settings.loadData(cnx);
int ret = settings.showDialog();
if (ret == 1) {
cnx = settings.getConnection();
GoogleContactsActivator.getGoogleContactsService().saveConfig(cnx);
} else {
cnx = null;
}
}
} else {
cnx = null;
}
} catch (Exception e) {
logger.info("GoogleContacts connection error", e);
return null;
}
return (GoogleContactsConnectionImpl) cnx;
}
/**
* Attach JAIN-SIP <tt>SipProvider</tt> and <tt>ListeningPoint</tt> to the stack either for clear
* communications or TLS. Clear UDP and TCP <tt>ListeningPoint</tt>s are not handled separately as
* the former is a fallback for the latter (depending on the size of the data transmitted). Both
* <tt>ListeningPoint</tt>s must be bound to the same address and port in order for the related
* <tt>SipProvider</tt> to be created. If a UDP or TCP <tt>ListeningPoint</tt> cannot bind, retry
* for both on another port.
*
* @param preferredPort which port to try first to bind.
* @param retries how many times should we try to find a free port to bind
* @param secure whether to create the TLS SipProvider. or the clear UDP/TCP one.
* @throws TransportNotSupportedException in case we try to create a provider for a transport not
* currently supported by jain-sip
* @throws InvalidArgumentException if we try binding to an illegal port (which we won't)
* @throws ObjectInUseException if another <tt>SipProvider</tt> is already associated with this
* <tt>ListeningPoint</tt>.
* @throws TransportAlreadySupportedException if there is already a ListeningPoint associated to
* this <tt>SipProvider</tt> with the same transport of the <tt>ListeningPoint</tt>.
* @throws TooManyListenersException if we try to add a new <tt>SipListener</tt> with a
* <tt>SipProvider</tt> when one was already registered.
*/
private void createProvider(int preferredPort, int retries, boolean secure)
throws TransportNotSupportedException, InvalidArgumentException, ObjectInUseException,
TransportAlreadySupportedException, TooManyListenersException {
String context = (secure ? "TLS: " : "clear UDP/TCP: ");
if (retries < 0) {
// very unlikely to happen with the default 50 retries
logger.error(context + "couldn't find free ports to listen on.");
return;
}
ListeningPoint tlsLP = null;
ListeningPoint udpLP = null;
ListeningPoint tcpLP = null;
try {
if (secure) {
tlsLP =
this.stack.createListeningPoint(
NetworkUtils.IN_ADDR_ANY, preferredPort, ListeningPoint.TLS);
if (logger.isTraceEnabled()) logger.trace("TLS secure ListeningPoint has been created.");
this.secureJainSipProvider = this.stack.createSipProvider(tlsLP);
this.secureJainSipProvider.addSipListener(this);
} else {
udpLP =
this.stack.createListeningPoint(
NetworkUtils.IN_ADDR_ANY, preferredPort, ListeningPoint.UDP);
tcpLP =
this.stack.createListeningPoint(
NetworkUtils.IN_ADDR_ANY, preferredPort, ListeningPoint.TCP);
if (logger.isTraceEnabled())
logger.trace("UDP and TCP clear ListeningPoints have " + "been created.");
this.clearJainSipProvider = this.stack.createSipProvider(udpLP);
this.clearJainSipProvider.addListeningPoint(tcpLP);
this.clearJainSipProvider.addSipListener(this);
}
if (logger.isTraceEnabled()) logger.trace(context + "SipProvider has been created.");
} catch (InvalidArgumentException ex) {
// makes sure we didn't leave an open listener
// as both UDP and TCP listener have to bind to the same port
if (tlsLP != null) this.stack.deleteListeningPoint(tlsLP);
if (udpLP != null) this.stack.deleteListeningPoint(udpLP);
if (tcpLP != null) this.stack.deleteListeningPoint(tcpLP);
// FIXME: "Address already in use" is not working
// as ex.getMessage() displays in the locale language in SC
// (getMessage() is always supposed to be English though)
// this should be a temporary workaround
// if (ex.getMessage().indexOf("Address already in use") != -1)
// another software is probably using the port
if (ex.getCause() instanceof java.io.IOException) {
if (logger.isDebugEnabled())
logger.debug("Port " + preferredPort + " seems in use for either TCP or UDP.");
// tries again on a new random port
int currentlyTriedPort = NetworkUtils.getRandomPortNumber();
if (logger.isDebugEnabled()) logger.debug("Retrying bind on port " + currentlyTriedPort);
this.createProvider(currentlyTriedPort, retries - 1, secure);
} else throw ex;
}
}