Re: [Bug 25579] New: State transitions are missing in RTCPeerConnections state transition diagram.

It seems good to add theses states. Otherwise it is tedious to maintain
sync between application state machine and browser state machine.


On Wed, May 7, 2014 at 10:06 AM, Harald Alvestrand <harald@alvestrand.no>wrote:

> On 05/06/2014 04:05 PM, bugzilla@jessica.w3.org wrote:
> > https://www.w3.org/Bugs/Public/show_bug.cgi?id=25579
> >
> >             Bug ID: 25579
> >            Summary: State transitions are missing in RTCPeerConnections
> >                     state transition diagram.
> >            Product: WebRTC Working Group
> >            Version: unspecified
> >           Hardware: All
> >                 OS: All
> >             Status: NEW
> >           Severity: normal
> >           Priority: P2
> >          Component: WebRTC API
> >           Assignee: public-webrtc@w3.org
> >           Reporter: kiran.guduru@samsung.com
> >                 CC: public-webrtc@w3.org
> >
> > Created attachment 1472
> >   --> https://www.w3.org/Bugs/Public/attachment.cgi?id=1472&action=edit
> > The attachment gives the updated state transition diagram for
> > RTCPeerConnection.
> >
> > RTCPeerConnection's state transition diagram, specified in spec [1], is
> missing
> > to indicate following state transitions state transitions.
> >
> > 1. have-remote-pranswer to have-local-offer
> >
> > 2. Have-local-pranswer to have-remtoe-offer
>
> Those two transitions are intended to be impossible. If you want to go
> from have-pranswer to have-offer, you need to go via the idle state.
>
> >
> > The same is applicable for statemachine defined in section 3.2 of JSEP
> draft
> > [2].
> >
> > This state transitions are MUST to support section 5 of RFC 3262 [3]
> prack
> > case.
> >
> > "If the UAC receives a reliable provisional response with an answer, it
> MAY
> > generate an additional offer in the PRACK."
>
> You can achieve the effect by re-applying the last PRANSWER transition
> as an ANSWER.
>
> People who understand PRACK can comment further.
>
> >
> > Please find the attachment for the proposed state transition diagram,
> which
> > includes these state.
> >
> > [1] http://dev.w3.org/2011/webrtc/editor/webrtc.html#state-definitions
> >
> > [2] http://tools.ietf.org/html/draft-ietf-rtcweb-jsep-06#page-7
> >
> > [3] http://www.ietf.org/rfc/rfc3262.txt
> >
>
>
> --
> Surveillance is pervasive. Go Dark.
>
>
>