Hi,
inline:
[EMAIL PROTECTED] wrote:
>
> Hi all,
>
> Had a couple of doubts regarding the QoS negotiation
> parameters defined in draft-ietf-sip-manyfolks-resource-07
>
> i) In the section 5.2 it is mentioned that:
>
> "An answerer may upgrade the desired strength in
> any entry of the transaction status table, but
> it must not downgrade it."
>
> By extrapolation, I guess, it should also be allowed
> to upgrade the direction-tag in the answer then. Please
> confirm... What I mean to ask is whether the following
> is valid -
>
> offer: m=audio 20000 RTP/AVP 0
> a=curr:qos e2e none
> a=des:qos optional e2e send
>
> answer: m=audio 20000 RTP/AVP 0
> a=curr:qos e2e none
> a=des:qos mandatory e2e sendrecv
What you are really doing in upgrading the desire strength in a
direction. In your example you would have:
offer: send: optional
recv: none
Answer: send: mandatory
recv: mandatory
You have upgraded the send direction from optional to mandatory and the
recv direction from none to mandatory.
>
> ii) In case the offer, contains a unknown precondition
> type (other than "qos"), the SDP answer should be
> of the form (using the example the draft mentions)
>
> m=audio 20000 RTP/AVP 0
> a=des:foo unknown e2e send
>
> What should be the SIP status code used for this response?
> Should we use "580" or "488" or some other code?
I would use 580.
Regards,
Gonzalo
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