Re: [reSIProcate] Multiple provisional with the same SDP: bug or feature?
On 2010 September 15, Wednesday 18:43:18 Scott Godin wrote:
> There is a parameter to the provisional method, called earlyFlag, that
> specifies if you would like the SDP to be provided in the 18x response or
> not (if you happened to provide the SDP to resip before calling this).
My bad, I was sidetracked by the comments in the header and failed to realize
there's already a solution :(
Thank you for the answer!
br
Szo
> If you are not using PRACK then any SDP send in a 18x response must also be
> repeated in the 200 response, and it cannot be changed - this is an RFC
> requirement.
>
> Scott
>
> On Wed, Sep 15, 2010 at 10:31 AM, Robert Szokovacs <
>
> rszokovacs@xxxxxxxxxxxxxxx> wrote:
> > Hi,
> >
> > We have a B2BUA based on resiprocate and we noticed that if the "c" leg
> > (the
> > one we call out to) sends a 183 with SDP and then a 180 without, we pass
> > the
> > "a" leg (the one originated the call) the 180 with the SDP from the 183
> > included. This is not the desired behaviour, since there are some 3rd
> > party devices that doesn't seem to tolerate this.
> > This happens because we call ServerInviteSession's
> > provide[Answer|Offer]() before calling provisional() for the 183, and
> > then calling provisional() for
> > the 180, and have no way of telling resiprocate not to include the SDP.
> > The problem is that according to the comments in ServerInviteSession.hxx
> > it is not
> > necessary:
> > /** Called to set the offer that will be used in the next message that
> >
> > sends an offer. [...] */
> >
> > virtual void provideOffer(const SdpContents& offer);
> >
> > (same with provideAnswer)
> >
> > We interpreted it as "the next and only the next" message will include
> > the SDP, but the code doesn't do that way. Is that the correct
> > behaviour? If it's
> > a bug, which way should I look for solution? Should we empty the
> > mCurrentLocalSdp & mProposedLocalSdp after sending it? Should we
> > transition to
> > a state that doesn't call setSdp() in sendProvisional() (which state?)
> >
> > Any help is appreciated!
> >
> > TIA
> >
> > br
> >
> > Szo
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