sip注册之后发起invite遇到的问题

[我是一个小胖子]

参考的自带的sip的例子。

注册成功之后发起invite，函数如下：

void CSIPExSIPIdleState::SendInviteL(
CSIPExSIPEngine& aEngine,
const TDesC8& aSipUri )
{
// Retrieve the active profile and connection
CSIPProfile& prof = aEngine.Profile();
CSIPConnection& conn = aEngine.ConnectionL();

// Create CUri8 from passed descriptor
CUri8* uri8 = aEngine.ConvertToUri8LC( aSipUri );

// Get dialog association, save for future use
// The ownership of uri8 is transferred
CSIPInviteDialogAssoc* dialogAssoc =
CSIPInviteDialogAssoc::NewL( conn, uri8, prof );
CleanupStack::Pop( uri8 );

aEngine.SetDialogAssoc( *dialogAssoc ); //Ownership is transferred!!

// Create the necessary message elements
CSIPMessageElements* msgElements = aEngine.CreateMessageElementsLC();

// Send the INVITE in the dialog
// The ownership of msgElements is transferred
CSIPClientTransaction* tx = dialogAssoc->SendInviteL( msgElements ); //执行到这里就没有反应了
CleanupStack::Pop( msgElements );

// Save the pointer to the transaction to the Engine
aEngine.SetClientTx( tx );

// Change machine state
aEngine.SetCurrentState( iClientEstablishingState );
}

我想要是出错也应该有个回复啊？
还有这个invite出去之后回调的那个函数？
是 MSIPConnectionObserver 的 IncomingResponse 或者 ErrorOccured 吗？
望指教，感谢！！

[qiu298]

很想知道你是怎么注册的，我连注册都没搞定