Re: [reSIProcate-users] 200OK with Offer in UAC "EarlyWithAnswer" state
PRACK support in dum is only completed for the client side (ie.
responding to a PRACK request). Support for sending a PRACK via dum has
not yet been completed.
Scott
> -----Original Message-----
> From: resiprocate-users-bounces@xxxxxxxxxxxxxxxxxxxx
> [mailto:resiprocate-users-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of
> Michael Trank
> Sent: Friday, August 31, 2007 10:34 AM
> To: resiprocate-users@xxxxxxxxxxxxxxxxxxxx
> Subject: [reSIProcate-users] 200OK with Offer in UAC "EarlyWithAnswer"
> state
>
>
>
> Friends:
>
> I am having a problem with sessions using DUM connecting to a gateway
> manufactured by Sonus. Not sure of the model number, but the SDP
> packets
> say "Sonus_UAC".
>
> My sessions look like the following:
>
> DUM GATEWAY
> INVITE ( no sdp, Supported: 100rel ) ------->>
> 100 Trying <<-------
> 180 Ringing ( with sdp offer, Requires 100rel ) <<-------
> PRACK ( with sdp answer ) ------->>
> 200 OK ( for the prack, no sdp ) <<-------
>
> At this point i hear the ringback from the telephone network through
> the
> gateway.
>
> But the next thing that happens is the remote telephone gets answered.
>
> 200 OK (for the invite, *with* sdp offer ) <<-------
>
> When the GW sends this 200 OK with a new offer, DUM shuts everything
> down,
> and the onFailure callback gets called.
>
> ACK ( no sdp ) -------->>
> BYE -------->>
>
>
> I looked at the state machine, and I think the relevant state
> transition
> for that 200 OK with the offer is the following:
>
> EarlyWithAnswer -> Terminated [ label =
> "on2XX-sdp/send::ACK,send::BYE,app::onFailure,app::onTerminated" ];
>
> So, DUM is doing what is documented. DUM seems to think that what the
> gateway is doing is *bad* SIP. But it seems to me that DUM could
> transition to
> the "Answered" state, and send a new answer in the ACK with
> provideAnswer(),
> and all would be well. Does anyone have any idea why
> DUM shuts down for on2XX-sdp in the EarlyWithAnswer state?
>
>
>
>
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