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Re: [osip-dev] 101 Dialog Established

From: Aymeric Moizard
Subject: Re: [osip-dev] 101 Dialog Established
Date: Thu, 8 Oct 2015 14:53:39 +0200

Le 8 oct. 2015 2:16 PM, "FEICHTER Christoph" <address@hidden> a écrit :
> hi aymeric,

Hi Christoph,

> I have a question regarding the 101 message.
> in a former eXosip the user could configure wether 101 shall
> be sent automatically, or not.
> now this parameter has been removed.
> and I found the suspicious lines in function _eXosip_snd_message:
>   if (sip->status_code == 101)
>     return OSIP_SUCCESS;
> is it right, that the 101 is created as dummy-response, just for establishing the dialog,
> but it is never sent ?

This is correct: the 101 has been removed for interoperability purpose with non compliant app! ;)

But internally, exosip requires the creation of dialog (and did), so I kept it and discard it before it is sent.

> and my second issue is regarding ist_rcv_invite:
> ist->orig_request  seems to be set to the 101 response, which has never been sent.

I guess orig_request contains the INVITE...

> but:
> in case the UAS receives an INVITE-retransmission, the 100 Trying should be retransmitted !
> but since the  ist->orig_request  is set to the 101 response, nothing is sent !
> do you agree that this is a bug in eXosip ?

Yes... Seems to be. Usually, sending a 180 is made as soon as you receive the invite. That's most probably the reason why I've never hit the issue.


> br,
> christoph
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