Re: [OpenSIPStack] FW: FW: OpenSBC as Forking Proxy
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Re: [OpenSIPStack] FW: FW: OpenSBC as Forking Proxy
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From: Gustavo C. <cur...@ho...> - 2007-07-11 17:47:19
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Hi Joegen:
=20
I made changes in the code to avoid that the invite continue being sent whe=
n sesion is being cancelled.
When a cancel is received, after cancelling the Invite Server Transaction, =
I terminate the Invite Client Transaction:
=20
BOOL ProxySession::ValidateRequest(SIPMessage & request)
{
....
}else if( request.IsCancel() ) { m_SessionManager.GetUserAgent().GetS=
tack().CancelInviteServerTransaction(m_Request); m_SessionManager.GetUse=
rAgent().GetStack().TerminateInviteClientTransaction(m_CurrentUACRequest); =
}
}
=20
BOOL SIPTransactionManager::TerminateInviteClientTransaction(const SIPMessa=
ge & invite){ if( m_IsTerminating ) return FALSE;
=20
PAssert( invite.IsInvite(), PLogicError );
=20
PWaitAndSignal lock( m_TransactionPoolMutex );
=20
TransactionId id =3D invite.GetTransactionId();
=20
if( id.AsString().IsEmpty() ) { LOG_IF_DEBUG( LogInfo(), "TerminateIn=
viteClientTransaction() - Unable to match transaction because transaction-i=
d is empty" ); return FALSE; }
=20
id.SetStateMachine( "ICT" );
=20
SIPTransaction * transaction =3D m_TransactionPool.GetAt( id.AsString() )=
; if( transaction =3D=3D NULL ) { return FALSE; } transaction->Ter=
minate();
=20
return TRUE;}
=20
And in ProxySession::OnDNSFailOver(), the m_CurrentUACRequest is actualized=
:
=20
void ProxySession::OnDNSFailOver(SIPDNSFailOver & failOverEvent){ SIPMessag=
e msg =3D failOverEvent.GetMessage();
=20
if( msg.IsInvite() ) { m_CurrentUACRequest =3D msg.AsString(); SIPURI ta=
rgetURI; msg.GetRequestURI(targetURI); SetDialogPeerAddress( targetURI.As=
String() ); }}
First, I tried:m_CurrentUACRequest =3D msg;But the m_CurrentUACRequest was =
not actualized, because the=20
m_InternalId was the same for both messages and:
=20
SIPMessage & SIPMessage::operator=3D(const SIPMessage & msg)
{
if( msg.m_InternalId =3D=3D m_InternalId )
return *this;
...
}
=20
Then i used the AsString():
=20
m_CurrentUACRequest =3D msg.AsString();
=20
I know this is not the best solution, then if you could suggest a better on=
e please let me know. Maybe in=20
SIPTransaction::DoDNSFailover(), changing :
=20
SIPMessage request =3D m_OpeningRequest;
=20
I attach the sip flows before and after the changes in the code, the second=
sip flow is more normal.
=20
Thanks for your help.
=20
Gustavo
=20
=20
> Date: Wed, 4 Jul 2007 15:06:09 +0800> To: cur...@gm...> From=
: joe...@gm...> CC: ope...@li...> Su=
bject: Re: [OpenSIPStack] FW: FW: OpenSBC as Forking Proxy> > Gustavo Curet=
ti wrote:> > Hi Joegen:> > > > I don't have a call sesion, i have a proxy s=
ession. The cancel is sent > > to the m_DialogPeerAddress for a proxy sessi=
on. I have added the > > following code:> > > > void ProxySession::OnDNSFai=
lOver(> > SIPDNSFailOver & failOverEvent> > )> > {> > SIPMessage msg =3D fa=
ilOverEvent.GetMessage();> > if( msg.IsInvite() )> > {> > SIPURI targetURI;=
> > msg.GetRequestURI(targetURI);> > SetDialogPeerAddress( targetURI.AsStri=
ng() );> > }> > }> > I have patched CVS accordingly.> > > > > > Then the ca=
ncel is sent to the actual target of the ICT transaction, > > but if the ac=
tual target is not answering, the ICT continue trying > > with the actual t=
arget and with the followings. The ICT transaction > > must stop trying. Co=
uld you give some directions, please?> > I think this is a compliant behavi=
or. Don't you want the UA to know > that the UAS is actually down? I have c=
hecked 3261 again and paragraph > indicates that a proxy MAY send a respons=
e to the CANCEL and generate a > new transaction towards the UAS. This is n=
ot a MUST and is left to the > implementors to decide on. I am open to disc=
uss this further if you > think it is a better approach to handle extra sta=
te in the proxy for > cancelling transaction. My main reason for doing this=
is to make proxy > transactions light and I would favor to let it stay tha=
t way.> > 9.2 Server Behavior> > The CANCEL method requests that the TU at =
the server side cancel a> pending transaction. The TU determines the transa=
ction to be> cancelled by taking the CANCEL request, and then assuming that=
the> request method is anything but CANCEL or ACK and applying the> transa=
ction matching procedures of Section 17.2.3. The matching> transaction is t=
he one to be cancelled.> > The processing of a CANCEL request at a server d=
epends on the type of> server. A stateless proxy will forward it, a statefu=
l proxy might> respond to it and generate some CANCEL requests of its own, =
and a UAS> will respond to it. See Section 16.10 for proxy treatment of CAN=
CEL.> > > > > >> > Thanks for your help.> > Gustavo.> > > > ---------------=
---------------------------------------------------------> >> > > Date: Tue=
, 26 Jun 2007 15:23:39 +0800> > > From: jb...@so...> > > To: =
jb...@so...; ope...@li...> > > CC=
: cur...@gm...> > > Subject: Re: [OpenSIPStack] FW: FW: OpenSB=
C as Forking Proxy> > >> > > Hi Gustavo,> > >> > > I have committed a fix o=
f this. It's very simple actually. I just> > > propagated a SIPDNSFailOver =
stack event to the call session and made> > > sure that m_CurrentUACInvite =
is replaced. Can you check if this is a> > > safe change? Thanks.> > >> > >=
Joegen> > >> > >> > > Joegen E. Baclor wrote:> > > > Hmmmn thats TRUE. Lem=
me dig further. I'll let you know once a fix is> > > > available.> > > >> >=
> >> > > > Gustavo Curetti wrote:> > > >> > > >> Joegen:> > > >>> > > >> T=
he fix works fine. But i have the following problem: When i hang up> > > >>=
and send a Cancel to OpenSBC, the OpenSBC respond with> > > >> Code487_Req=
uestCancelled but the Cancel is not been send to the > > actual> > > >> tar=
get, the Cancel is just routed again.> > > >>> > > >> Thanks for your help.=
> > > >>> > > >> Gustavo> > > >>> > > >> > > ------------------------------=
------------------------------------------> > > >>> > > >>> > > >>> Date: W=
ed, 13 Jun 2007 22:15:14 +0800> > > >>> To: cur...@gm...; > > =
ope...@li...> > > >>> Subject: Re: [OpenSIPStac=
k] FW: FW: OpenSBC as Forking Proxy> > > >>> From: joe...@gm...>=
> > >>>> > > >>> I've just checked in a fix for this in CVS.> > > >>>> > >=
>>> Gustavo Curetti wrote:> > > >>>> > > >>>> Joegen,> > > >>>>> > > >>>> =
I tried the DoDNSFailover's code but i have the following behavior:> > > >>=
>>> > > >>>> When DoDNSFailover() is called for the first time > > m_FailOv=
erAttempts> > > >>>> is increased from 0 to 1.> > > >>>>> > > >>>> Then the=
via is changed (+ "-") and with this change when> > > >>>> FindTransaction=
AndAddEvent() is called a new transaction is > > created.> > > >>>> In SIPT=
ransaction::SIPTransaction() m_FailOverAttempts is > > initialized> > > >>>=
> to 0. Then when DoDNSFailover() is called again, the same target> > > >>>=
>> > > >> is used.> > > >>> > > >>>> Gustavo> > > >>>>> > > >>>>> > > >>>>>=
> > >> > > ---------------------------------------------------------------=
---------> > > >>> > > >>>> From: cur...@ho...> > > >>>> To:=
jb...@so...> > > >>>> Subject: RE: [OpenSIPStack] FW: OpenSB=
C as Forking Proxy> > > >>>> Date: Wed, 30 May 2007 14:43:32 +0200> > > >>>=
>> > > >>>> Joegen,> > > >>>>> > > >>>> Thanks a lot. I will try to change =
the behavior.> > > >>>>> > > >>>> Gustavo> > > >>>>> > > >>>>> > > >>>>> > =
> >>>>> > > >> > > --------------------------------------------------------=
----------------> > > >>> > > >>>>> Date: Fri, 18 May 2007 08:15:20 +0800> =
> > >>>>> From: jb...@so...> > > >>>>> To: curetti.gustavo@gm=
ail.com;> > > >>>>>> > > >>>> ope...@li...> > >=
>>>>> > > >>>>> Subject: Re: [OpenSIPStack] FW: OpenSBC as Forking Proxy> =
> > >>>>>> > > >>>>> Gustavo,> > > >>>>>> > > >>>>> Sorry, I forgot to get =
back to you. If you have the latest CVS > > head> > > >>>>> code, check out=
BOOL SIPTransaction::DoDNSFailover() in> > > >>>>> SIPTransaction.cxx. I h=
ave committed this a few days ago to> > > >>>>> demonstrate fail-over by fo=
rking using DNS/SRV records. New> > > >>>>> transactions are created by cal=
ling> > > >>>>>> > > >>>> FindTransactionAndAddEvent(). You> > > >>>>> > > =
>>>>> can just change its behavior a bit and get the fail-over routes> > > =
>>>>> somewhere instead of DNS/SRV queries.> > > >>>>>> > > >>>>> Joegen> >=
> >>>>>> > > >>>>>> > > >>>>> Gustavo Curetti wrote:> > > >>>>>> > > >>>>>=
> Joegen:> > > >>>>>>> > > >>>>>> I don't understand how to create a new cl=
ient transaction when> > > >>>>>>> > > >>>> the> > > >>>>> > > >>>>>> first=
invite fail in the FSM layer. Could you give some> > > >>>>>>> > > >>>> di=
rections,> > > >>>>> > > >>>>>> please?> > > >>>>>>> > > >>>>>> Thanks for =
your help.> > > >>>>>>> > > >>>>>> Gustavo.> > > >>>>>>> > > >>>>>>> > > >>=
>>>>> > > >>>>>>> > > >>>>>>> > > >> > > ----------------------------------=
--------------------------------------> > > >>> > > >>>>>> From: curetti_gu=
st...@ho...> > > >>>>>> To: jb...@so...> > > >>>>>> Sub=
ject: RE: [OpenSIPStack] OpenSBC as Forking Proxy> > > >>>>>> Date: Mon, 14=
May 2007 16:18:57 +0200> > > >>>>>>> > > >>>>>> Joegen:> > > >>>>>>> > > >=
>>>>> Thanks for your help. Do you suggest to do the serial forking in> > >=
>>>>>> FSM layer with a custom header?.Must each new try create a new> > >=
>>>>>> client transaction?> > > >>>>>>> > > >>>>>> Thanks> > > >>>>>> Gust=
avo> > > >>>>>>> > > >>>>>>> > > >>>>>>> > > >> > > -----------------------=
-------------------------------------------------> > > >>> > > >>>>>>> Date=
: Thu, 10 May 2007 13:28:29 +0800> > > >>>>>>> From: jbaclor@solegysystems.=
com> > > >>>>>>> To: cur...@gm...> > > >>>>>>> Subject: Re: [O=
penSIPStack] OpenSBC as Forking Proxy> > > >>>>>>>> > > >>>>>>> Gustavo,> >=
> >>>>>>>> > > >>>>>>> This will be a bit tricky. It is not as simple as s=
pawning an> > > >>>>>>>> > > >>>>>> outbound> > > >>>>>>> > > >>>>>>> invit=
e. There should be a clean mechanism to clone> > > >>>>>>>> > > >>>> transa=
ctions and> > > >>>>> > > >>>>>>> this is not present in the FSM currently.=
Forking should be done> > > >>>>>>>> > > >>>>>> in the> > > >>>>>>> > > >>=
>>>>> FSM layer, not in the UACore layer. I will see what I can do to> > > =
>>>>>>>> > > >>>>>> help> > > >>>>>>> > > >>>>>>> you. I will let you know =
when I have something you can use> > > >>>>>>>> > > >>>>>> cleanly to> > > =
>>>>>>> > > >>>>>>> fork your calls. Perhaps over the weekend, but that isn=
't a> > > >>>>>>>> > > >>>> promise.> > > >>>>> > > >>>>>>> Joegen> > > >>>=
>>>>> > > >>>>>>> Gustavo Curetti wrote:> > > >>>>>>>> > > >>>>>>>> Joegen:=
> > > >>>>>>>>> > > >>>>>>>> What I want to do is a very simple sequential =
search. When one> > > >>>>>>>> destination don't answer or reject the call =
I want the OpenSBC> > > >>>>>>>>> > > >>>>>> try> > > >>>>>>> > > >>>>>>>> =
another.> > > >>>>>>>>> > > >>>>>>>> I made the following changes in the co=
de for timer B> > > >>>>>>>>> > > >>>>>> expiration just> > > >>>>>>> > > >=
>>>>>>> for do some tests:> > > >>>>>>>>> > > >>>>>>>> void ProxySessionMan=
ager::OnTimerExpire(> > > >>>>>>>> SIPTimerExpire & timerEvent,> > > >>>>>>=
>> SIPSession * session> > > >>>>>>>> )> > > >>>>>>>> {> > > >>>>>>>> if( s=
ession !=3D NULL )> > > >>>>>>>> {> > > >>>>>>>> LOG_IF_DEBUG( LogWarning()=
, "*** TIMER EXPIRATION *** for SIP> > > >>>>>>>> Session " << session->Get=
SessionId() );> > > >>>>>>>> if( timerEvent.GetTimer() =3D=3D> > > >>>>>>>>=
> > > >>>> SIPTransactions::SIPTimerEvent::B)> > > >>>>> > > >>>>>>>> {> > =
> >>>>>>>> SIPMessage msg =3D ((ProxySession> > > >>>>>>>>> > > >>>> *)sess=
ion)->GetOriginalInvite();> > > >>>>> > > >>>>>>>> session->EnqueueSessionE=
vent( new SIPSessionEvent(> > > >>>>>>>>> > > >>>> *session, 1,> > > >>>>> =
> > >>>>>>>> msg ) );> > > >>>>>>>> }> > > >>>>>>>> session->OnTimerExpire(=
timerEvent );> > > >>>>>>>> }> > > >>>>>>>> }> > > >>>>>>>>> > > >>>>>>>> =
and> > > >>>>>>>>> > > >>>>>>>> void ProxySession::OnTimerExpire(> > > >>>>=
>>>> SIPTimerExpire & timerEvent> > > >>>>>>>> )> > > >>>>>>>> {> > > >>>>>=
>>> GCREF( "SIPSession::OnTimerExpire" );> > > >>>>>>>> if( timerEvent.GetT=
imer() =3D=3D> > > >>>>>>>>> > > >>>> SIPTransactions::SIPTimerEvent::B ||>=
> > >>>>> > > >>>>>>>> timerEvent.GetTimer() =3D=3D SIPTransactions::SIPTi=
merEvent::F )> > > >>>>>>>> {> > > >>>>>>>> ///this is an ICT timeout> > > =
>>>>>>>> SIPMessage timeout;> > > >>>>>>>> GetCurrentUASRequest().CreateRes=
ponse( timeout,> > > >>>>>>>> SIPMessage::Code480_TemporarilyNotAvailable )=
;> > > >>>>>>>> SendRequest( timeout );> > > >>>>>>>> }> > > >>>>>>>>> > > =
>>>>>>>> //Destroy();> > > >>>>>>>> }> > > >>>>>>>>> > > >>>>>>>> With thes=
e changes and a relay route:> > > >>>>>>>>> > > >>>>>>>> [sip:*@192.168.0.2=
07:*] sip:192.168.0.1:5060,> > > >>>>>>>>> > > >>>>>> sip:192.168.0.60:5060=
> > > >>>>>>> > > >>>>>>>> the OpenSBC made the second invite successfully.=
But what i> > > >>>>>>>>> > > >>>>>> really> > > >>>>>>> > > >>>>>>>> want=
is to use some custom headers with a list destination> > > >>>>>>>>> > > >=
>>>>> addresses> > > >>>>>>> > > >>>>>>>> instead of the relay routes and t=
o do the same in case of a> > > >>>>>>>>> > > >>>>>> reject. Do> > > >>>>>>=
> > > >>>>>>>> you have any suggestions?> > > >>>>>>>>> > > >>>>>>>> Other =
question: Can i have two active ICT for a session?> > > >>>>>>>>> > > >>>>>=
> Because in> > > >>>>>>> > > >>>>>>>> the case of reject, I must start a n=
ew ICT for trying the next> > > >>>>>>>> destination but canceling throw th=
e first ICT at the same> > > >>>>>>>>> > > >>>> time.> > > >>>>> > > >>>>>>=
>> Thanks for your help.> > > >>>>>>>>> > > >>>>>>>> Gustavo> > > >>>>>>>>>=
> > >>>>>>>>> > > >>>>>>>>> > > >> > > -----------------------------------=
-------------------------------------> > > >>> > > >>>>>>>>> Date: Sat, 5 M=
ay 2007 13:50:44 +0800> > > >>>>>>>>> From: jb...@so...> > > =
>>>>>>>>> To: cur...@gm...;> > > >>>>>>>>>> > > >>>>>> opensip=
sta...@li...> > > >>>>>>> > > >>>>>>>>> Subject: Re: [=
OpenSIPStack] OpenSBC as Forking Proxy> > > >>>>>>>>>> > > >>>>>>>>> Gustav=
o,> > > >>>>>>>>>> > > >>>>>>>>> Forking is not supported yet in OpenSBC.> =
> > >>>>>>>>>> > > >>>>>>>>> Joegen> > > >>>>>>>>>> > > >>>>>>>>> Gustavo C=
uretti wrote:> > > >>>>>>>>>> > > >>>>>>>>>> Hi Joegen:> > > >>>>>>>>>>> > =
> >>>>>>>>>> I want to use the OpenSBC as a Forking Proxy. I want> > > >>>>=
>>>>>>> > > >>>> that the> > > >>>>> > > >>>>>>>>>> OpenSBC try the differe=
nts Relays Routes one by one. Could> > > >>>>>>>>>>> > > >>>>>> you give> >=
> >>>>>>> > > >>>>>>>>>> some directions, please?> > > >>>>>>>>>>> > > >>>=
>>>>>>> Thanks for your help.> > > >>>>>>>>>>> > > >>>>>>>>>> Gustavo.> > >=
>>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>> > > >> > > -------------------=
-----------------------------------------------------> > > >>> > > >>>>>>>>=
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> >>>>>>>>>> _______________________________________________> > > >>>>>>>>>=
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_______________________________________________> > > >>>>> opensipstack-dev=
el mailing list> > > >>>>> ope...@li...> > > >>=
>>> https://lists.sourceforge.net/lists/listinfo/opensipstack-devel> > > >>=
>>>> > > >>>>> > > >>>>> > > >> > > ---------------------------------------=
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orge.net> > > >>>> https://lists.sourceforge.net/lists/listinfo/opensipstac=
k-devel> > > >>>>> > > >>>>> > > >>> --> > > >>> Joegen E. Baclor> > > >>> =
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___________> > > > opensipstack-devel mailing list> > > > opensipstack-deve=
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