How to extract expires time from SIP 200 OK message

[miikkis]

Hi,

does anyone know howto extract expires field from 200 OK message

I send publish to server and it answers

SIP/2.0 200 OK
Record-Route: <sip:xxx.xxx.xxx.xxx;lr;ftag=k3gdejv31dhc7j6lq98u;nat=yes>
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;rport=56487;received=xxx.xxx.xxx.xxx;branch=z9hG4bK34hdejpvi1hc7p54q98s86k
To: <sip:joujou@man.com>;tag=c3adb321b3e3ffca4d8376d5ed5c7440.24d2
From: <sip:jou@man.com>;tag=k3gdejv31dhc7j6lq98u
CSeq: 36741 PUBLISH
Call-ID: TWznjULCoId_MZ9h5XNGfv7F_5l3WM
Contact: <sip:xxx.xxx.xxx.xxx:5070>
Expires: 585
SIP-ETag: a.1205157372.31036.15861
Server: OpenSER (1.2.2-notls (i386/linux))
Content-Length: 0

So there is Expires: 585 what I need to get out of that message.
My application should send publish again before that time is reached. Any ideas?
I have looked SDPDoc->ConnectionField(); and SDPDoc->AttributeFields(); but cant find howto get that expires time.

Thanks for helping again

[tkot]

Hi miikkis!

The element of message that you are interested of is not SDP, but SIP -> using SDP API does no good.

What you need, is to use SIP API. I assume you are using build-in SIP to send PUBLISH request into network. When 200 OK response is received, use CSIPMessageElements class (UserHeaders() there to be more specific) to read that header you are interested of.

Hope that helps!
tkot

[jcaradec]

Hi Miikkis,

tkot is right please use the following code when you are decoding the 200 ok response. this is valid for all the user headers, just change the label.

CSIPRequestElements* reqElem = CONST_CAST( CSIPRequestElements*,aTransaction->RequestElements() );
const RPointerArray<CSIPHeaderBase>& userHeaders = reqElem->MessageElements().UserHeaders();
//
// try to decode the contact header //
for( TInt a = 0; a < userHeaders.Count(); a++ )
{
#ifdef __SERIES60_3X__
if ( userHeaders[a]->Name().DesC().Compare(_L8("Expires")) == 0 )
#else
if ( userHeaders[a]->FullName().Compare(_L8("Expires")) == 0 )
#endif
{
userHeaders[a]->ToTextValueL()->Des() is where you retrieve the conatct information
}
}// for


Jean-philippe

[miikkis]

    
void CSIPEngine::IncomingRequest(CSIPServerTransaction* aTransaction,
	CSIPDialog& aDialog )
else if ( aTransaction->Type() == 
    SIPStrings::StringF( SipStrConsts::EPhraseOk ))
    	{
    	CSIPRequestElements* reqElem = CONST_CAST( CSIPRequestElements*,aTransaction->RequestElements() );
    	const RPointerArray<CSIPHeaderBase>& userHeaders = reqElem->MessageElements().UserHeaders();
    	//
    	// try to decode the contact header //
    	for( TInt a = 0; a < userHeaders.Count(); a++ )
    		{
    		if ( userHeaders[a]->Name().DesC().Compare(_L8("Expires")) == 0 )
    			{
    			iExpiresTime.Copy(userHeaders[a]->ToTextValueL()->Des());
    			}
    		}
    	}

I tried that and iExpiresTime is empty after receiving 200 ok.
There is so many IncomingRequest() in example sip engine so I dont know where is should put that code

I think it is time for some debugging

[jcaradec]

Miikkis,

the publish 200 ok is received via the following callback method

IncomingResponse( CSIPClientTransaction& aTransaction )

don't forget to handle the etag header.

Hope that it's gonna solve your problem.

Jean-philippe

[miikkis]

Thanks very much for helping me out of this

// -----------------------------------------------------------------------------
// CSIPEngine::IncomingResponse - No implementation needed
// -----------------------------------------------------------------------------
void CSIPEngine::IncomingResponse( 
    CSIPClientTransaction&  aTransaction  )
	{
    if ( aTransaction.Type() == 
    SIPStrings::StringF( SipStrConsts::EPhraseOk ))
    	{
    	CSIPResponseElements* reqElem = CONST_CAST( CSIPResponseElements*, aTransaction.ResponseElements() );
    	const RPointerArray<CSIPHeaderBase>& userHeaders = reqElem->MessageElements().UserHeaders();
    	//
    	// try to decode the contact header //
    	for( TInt a = 0; a < userHeaders.Count(); a++ )
    		{
    		if ( userHeaders[a]->Name().DesC().Compare(_L8("Expires")) == 0 )
    			{
    			iExpiresTime.Copy(userHeaders[a]->ToTextValueL()->Des());
    			}
    		}
    	}
	}

I did this and tried to debug, anyway when server sends 200 ok debug doest go to that callback method. (and I looked all other IncomingResponse methods) so where is problem

I changed ur code a little, there was

CSIPRequestElements* reqElem = CONST_CAST( CSIPRequestElements*,aTransaction->RequestElements() );

and there isnt RequestElements, but there was ResponseElements. I think that is correct?

edit1
I send now iObserver->WriteLog to my main application and when 200 OK is received writelog doesnt get notify. I put that writelog call to every response received and requestreceived funktion and still nothing

edit2
Do I use sip engine wrong?
in UI

constructL()
iSipEngine = CSIPEngine::NewL(KUidSIPExApp, this );

sendpublish()
iSipEngine->EnableProfile;
iSipEngine->Publish(writeBuffer);

SipEngine

EXPORT_C void CSIPEngine::Publish(const TDesC8& aData)
	{
	 
	//get aor from the profile
	 
	// Create the From header value using info from the profile
    const TDesC8* aor = NULL;
    iProfile->GetParameter( KSIPUserAor, aor );
	
	 
	 
	CSIPAddress* toAddress =CSIPAddress::DecodeL(*aor);
	CleanupStack::PushL(toAddress);
	 
	CSIPToHeader* toHeader = CSIPToHeader::NewL(toAddress);
	CleanupStack::Pop(toAddress);
	CleanupStack::PushL(toHeader);
	CUri8* uri = ConvertToUri8LC(*aor);
	CSIPRequestElements* reqElems = CSIPRequestElements::NewL(uri); 
	CSIPMessageElements& MessageElements1=reqElems->MessageElements();
	 
	
	MessageElements1.SetContentL(aData.AllocL(),
	    CSIPContentTypeHeader::NewL(_L8("application"),_L8("pidf+xml")));
	 
	RPointerArray <CSIPHeaderBase> myheader1(1);
	 
	CSIPEventHeader* EventHeader1=CSIPEventHeader::NewL ( _L8("presence")); 
	myheader1.Append(EventHeader1);
	 
	MessageElements1.SetUserHeadersL(myheader1);
	 
	CleanupStack::Pop(); //toHeader
	 
	CleanupStack::PushL(reqElems);
	RStringPool pool = SIPStrings::Pool();
	
	RStringF str = pool.OpenFStringL(_L8("PUBLISH"));
	reqElems->SetMethodL(str);
	 
	 
	
	// Get the current connection
	CSIPConnection& conn = ConnectionL();

	// Send the request using the connection (ownership of the
	// request elements object is transferred)
	//CSIPClientTransaction* ctx = conn.SendRequestL( reqElem );
	CSIPClientTransaction* ctx = conn.SendRequestL( reqElems, *iProfile );
	CleanupStack::Pop( reqElems );

	delete ctx;
	 
	 
	}

is there something missing what causes that I dont get server responses?

[jcaradec]

Miikkis,

you need to use
const RPointerArray<CSIPHeaderBase>& userHeaders = aTransaction.ResponseElements()->MessageElements().UserHeaders();

when decoding the response.

you should study carefully the sip example.

when iSipEngine->EnableProfile; is used the phone sends a register and teh server sends back a 200 ok which triggers ProfileRegistrationStatusChanged() with a iProfile->Status() = CSIPProfile::ERegistered status

at that time you can retrieve the connection object and send request. Before i think you can't

so you cannot chain enableprofile and send publish (unless the phone is already registered with the selected profile)

Jean-philippe

[miikkis]

ok I find reason why my app didnt get responses.

When I do this in

TBuf8<128> buf;
	if ( statusCode == 200 )
   	{
    	const RPointerArray<CSIPHeaderBase>& userHeaders = respElem->MessageElements().UserHeaders();
    	//
    	// try to decode the contact header //
    	for( TInt a = 0; a < userHeaders.Count(); a++ )
    		{
    		buf.Copy(userHeaders[a]->Name().DesC());
    		if ( buf.Compare(_L8("Expires")) == 0 )
    			{
    			iExpiresTime.Copy(userHeaders[a]->ToTextValueL()->Des());
    			}
    		}

buf is empty every time. anyway userHeaders.Count(); returns 4.
I think that there is somekind problem on line
const RPointerArray<CSIPHeaderBase>& userHeaders = respElem->MessageElements().UserHeaders();

any ideas?

[miikkis]

wohoo now it works

here is code if some1 else needs it sometime

void CSIPEngine::IncomingResponse( 
    CSIPClientTransaction&  aTransaction  )
	{
const CSIPResponseElements* respElem = CONST_CAST( CSIPResponseElements*, aTransaction.ResponseElements() );

	TUint statusCode = respElem->StatusCode();
	
	if ( statusCode == 200 )
   	{
    	const RPointerArray<CSIPHeaderBase>& userHeaders = respElem->MessageElements().UserHeaders();
    	//
    	// try to decode the contact header //
    	for( TInt a = 0; a < userHeaders.Count(); a++ )
    		{
    		const CSIPHeaderBase* header = userHeaders[ a ];
    	
    		if ( header->Name() == SIPStrings::StringF( SipStrConsts::EExpiresHeader ) )
    			{
    			iExpiresTime.Copy(userHeaders[a]->ToTextValueL()->Des());
    			}
    		}
    	iObserver->WriteLog( iExpiresTime );
    	}
 }

many thanks to jcaradec helping me on this