/**
* Dispatches the event received from a JAIN-SIP <tt>SipProvider</tt> to one of our "candidate
* recipient" listeners.
*
* @param event the event received for a <tt>SipProvider</tt>.
*/
public void processIOException(IOExceptionEvent event) {
try {
if (logger.isTraceEnabled()) logger.trace(event);
// impossible to dispatch, log here
if (logger.isDebugEnabled()) logger.debug("@todo implement processIOException()");
} catch (Throwable exc) {
// any exception thrown within our code should be caught here
// so that we could log it rather than interrupt stack activity with
// it.
this.logApplicationException(DialogTerminatedEvent.class, exc);
}
}
/**
* Logs exceptions that have occurred in the application while processing events originating from
* the stack.
*
* @param eventClass the class of the jain-sip event that we were handling when the exception was
* thrown.
* @param exc the exception that we need to log.
*/
private void logApplicationException(Class<DialogTerminatedEvent> eventClass, Throwable exc) {
String message = "An error occurred while processing event of type: " + eventClass.getName();
logger.error(message, exc);
if (logger.isDebugEnabled()) logger.debug(message, exc);
}
/**
* Find the <tt>ProtocolProviderServiceSipImpl</tt> (one of our "candidate recipient" listeners)
* which this <tt>request</tt> should be dispatched to. The strategy is to look first at the
* request URI, and then at the To field to find a matching candidate for dispatching. Note that
* this method takes a <tt>Request</tt> as param, and not a <tt>ServerTransaction</tt>, because
* sometimes <tt>RequestEvent</tt>s have no associated <tt>ServerTransaction</tt>.
*
* @param request the <tt>Request</tt> to find a recipient for.
* @return a suitable <tt>ProtocolProviderServiceSipImpl</tt>.
*/
private ProtocolProviderServiceSipImpl findTargetFor(Request request) {
if (request == null) {
logger.error("request shouldn't be null.");
return null;
}
List<ProtocolProviderServiceSipImpl> currentListenersCopy =
new ArrayList<ProtocolProviderServiceSipImpl>(this.getSipListeners());
// Let's first narrow down candidate choice by comparing
// addresses and ports (no point in delivering to a provider with a
// non matching IP address since they will reject it anyway).
filterByAddress(currentListenersCopy, request);
if (currentListenersCopy.size() == 0) {
logger.error("no listeners");
return null;
}
URI requestURI = request.getRequestURI();
if (requestURI.isSipURI()) {
String requestUser = ((SipURI) requestURI).getUser();
List<ProtocolProviderServiceSipImpl> candidates =
new ArrayList<ProtocolProviderServiceSipImpl>();
// check if the Request-URI username is
// one of ours usernames
for (ProtocolProviderServiceSipImpl listener : currentListenersCopy) {
String ourUserID = listener.getAccountID().getUserID();
// logger.trace(ourUserID + " *** " + requestUser);
if (ourUserID.equals(requestUser)) {
if (logger.isTraceEnabled())
logger.trace("suitable candidate found: " + listener.getAccountID());
candidates.add(listener);
}
}
// the perfect match
// every other case is approximation
if (candidates.size() == 1) {
ProtocolProviderServiceSipImpl perfectMatch = candidates.get(0);
if (logger.isTraceEnabled())
logger.trace("Will dispatch to \"" + perfectMatch.getAccountID() + "\"");
return perfectMatch;
}
// more than one account match
if (candidates.size() > 1) {
// check if a custom param exists in the contact
// address (set for registrar accounts)
for (ProtocolProviderServiceSipImpl candidate : candidates) {
String hostValue =
((SipURI) requestURI).getParameter(SipStackSharing.CONTACT_ADDRESS_CUSTOM_PARAM_NAME);
if (hostValue == null) continue;
if (hostValue.equals(candidate.getContactAddressCustomParamValue())) {
if (logger.isTraceEnabled())
logger.trace(
"Will dispatch to \""
+ candidate.getAccountID()
+ "\" because "
+ "\" the custom param was set");
return candidate;
}
}
// Past this point, our guess is not reliable. We try to find
// the "least worst" match based on parameters like the To field
// check if the To header field host part
// matches any of our SIP hosts
for (ProtocolProviderServiceSipImpl candidate : candidates) {
URI fromURI = ((FromHeader) request.getHeader(FromHeader.NAME)).getAddress().getURI();
if (fromURI.isSipURI() == false) continue;
SipURI ourURI = (SipURI) candidate.getOurSipAddress((SipURI) fromURI).getURI();
String ourHost = ourURI.getHost();
URI toURI = ((ToHeader) request.getHeader(ToHeader.NAME)).getAddress().getURI();
if (toURI.isSipURI() == false) continue;
String toHost = ((SipURI) toURI).getHost();
// logger.trace(toHost + "***" + ourHost);
if (toHost.equals(ourHost)) {
if (logger.isTraceEnabled())
logger.trace(
"Will dispatch to \""
+ candidate.getAccountID()
+ "\" because "
+ "host in the To: is the same as in our AOR");
return candidate;
}
}
// fallback on the first candidate
ProtocolProviderServiceSipImpl target = candidates.iterator().next();
logger.info(
"Will randomly dispatch to \""
+ target.getAccountID()
+ "\" because there is ambiguity on the username from"
+ " the Request-URI");
if (logger.isTraceEnabled()) logger.trace("\n" + request);
return target;
}
// fallback on any account
ProtocolProviderServiceSipImpl target = currentListenersCopy.iterator().next();
if (logger.isDebugEnabled())
logger.debug(
"Will randomly dispatch to \""
+ target.getAccountID()
+ "\" because the username in the Request-URI "
+ "is unknown or empty");
if (logger.isTraceEnabled()) logger.trace("\n" + request);
return target;
} else {
logger.error("Request-URI is not a SIP URI, dropping");
}
return null;
}
/**
* 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;
}
}
