[reSIProcate] How to maintain SUBSCRIBE AppDialogSets?

["Dien Ba Quang" <dienbaquang@xxxxxxxxx>]

Hi,
In my soft phone, I implemented SUBSCRIBE and NOTIFY messages to maintain a buddy list. But I have some problems with the SUBSCRIBE AppDialogSets, it crashed sometimes. Below is my implementation:
After received 200 OK for REGISTER messages, send SUBSCRIBE messages for every contacts in my buddy list (code below). 

1. The problem is when I try to delete all the AppDialogSets (when closing soft phone), it crashed my app. So do you know how DUM deletes the AppDialogSet? and What's the good ways to maintain the SUBSCRIBE AppDialogSets?
2. When I repeated sending SUBSCRIBE messages from another instant (the same code) to the soft phone, it crashed (just sometime). I don't know what's the problem with DUM? It's always crash at line 775 in 
dialogset.cxx

AppDialog* appDialog = mAppDialogSet->createAppDialog(msg);

Best regards,
DBQ.

void SendSubscribe(char* contact, int exp_time)
{

    try {
        string validContact = validateSipAddress(contact);
        NameAddr uasAor(validContact.c_str());

        Data mevent("presence");

        //Check if the contact already has the AppDialogSet or not
        testAppDialogSet *m_pADS = uac.getSubscribeDialog(uasAor.uri());
        if (m_pADS == NULL) //if not -> create a new one and store into a list(contact, group, AppDialogSet)
        {
            testAppDialogSet *m_pADS = new testAppDialogSet(*(clientDum), "UAC(SUBSCRIBE)");
            uac.addBuddy(uasAor.uri(), "Friends", m_pADS);
        }

        SharedPtr<SipMessage> SubscribeMessage = clientDum->makeSubscription(uasAor, mevent, exp_time, m_pADS);        
        clientDum->send(SubscribeMessage);
    }

    catch (BaseException& e) {
        return;

    }

//delete all SUBSCRIBE AppDialogSets
void TestUac::deleteSubscribeDialog()

{
   TestUac::BuddyIterator i;
   i = mBuddies.begin

();    
   while ( i != mBuddies.end() )
   {

        if ( i->presDialog != NULL )
        {

            delete i->presDialog;
            i->presDialog = NULL;
        }
        i = mBuddies.erase

(i);
   }
}

//Subscription Callbacks
void TestUac::onUpdateActive(ClientSubscriptionHandle is, const SipMessage& notify, bool outOfOrder)
{
    if (notify.header(h_Event).value() == Data("message-summary"))
    {
        is->acceptUpdate();
        //TODO:check voice message

        return;
    }
    is->acceptUpdate();
    Contents *body = notify.getContents();
    //Received NOTIFY message event with no contents
    if (!body){
        return;
    }
    Pidf* pidf = dynamic_cast<Pidf*>(body);    
    Uri uri = pidf->getEntity();
    //update status of uri as Online
    PresenceNotify((char*)uri.user().c_str(), 1, 0);
}

void TestUac::onNewSubscription(ServerSubscriptionHandle is, const SipMessage& sub)
{
    SharedPtr<SipMessage> sipmsg = is->accept();
    is->send(sipmsg);
    Data fromAor(sub.header(h_From).uri().getAor());
    string name = str_get_username(fromAor.c_str());
    if (sub.header(h_Expires).value() != 0){
        Token state;
        
state.value() = Data("active");
        Pidf *doc = new Pidf(Mime("application", "pidf-xml"));
        doc->setEntity(myUri);
        doc->setSimpleStatus(true);
        sipmsg = is->update(doc);
        sipmsg->header(h_SubscriptionState) = state;
        is->send(sipmsg);
        delete doc;

        //check if the name is not online --> resend SUBSCRIBE message
        PresenceNotify((char*)name.c_str(), 1, 1);
    }
    else {
        //in case Unsubscribe expire = 0 
        PresenceNotify((char*)name.c_str(), 0, 0);
    }
}