Re: draft-ietf-sip-info-events-00: Content-Type vs Info-Package [was RE: draft-ietf-sip-info-events-00: multiple packages per INFO]

Hi, 

>For SDP, you find the part by looking for the one with 
>Content-Disposition:session. If there is a part with no C-D 
>header then one with a C-T of application/sdp defaults to 
>"session". So its all about C-D.

The C-D header gives you information about the body, yes, but I don't
think it helps you to FIND the body.

That's what the SIP and MIME ABNFs are for.

Regards,

Christer





> 
> 	Paul
> 
> Christer Holmberg wrote:
> > Hi,
> > 
> >> I do think there is something we haven't discussed: how do 
> we figure 
> >> out what part of the overall body is the part that carries the 
> >> package?
> >> Normally this is no issue, since it is the entire body of the INFO 
> >> message. But there are cases where it might not be. For 
> instance if 
> >> S/MIME is used, or if there is some header in the message 
> the needs 
> >> to reference a body part from a CID URI.
> >>
> >> The answer to this goes back to Content-Disposition. The body part 
> >> that contains the info package should have a unique C-D.
> >> That can be "render", or we could pick some other one.
> > 
> > I believe the mime rules are something like:
> > 
> > --boundary
> > Mime-headers
> > Empy-line
> > Content (SDP, info packet, etc)
> > --boundary--
> > 
> > 
> > For SIP, the ruleas are:
> > 
> > SIP-part
> > Empty-line
> > Message body (SDP, info packet - or one of more mimes).
> > 
> > 
> > I guess the question is whether we should define some 
> generic syntax 
> > for the info packages, e.g. Something which identifies the 
> beginning 
> > of an info package.
> > 
> > For SDP, you find the beginning by looking for the v= parameter.
> > 
> > Regards,
> > 
> > Christer
> > 
> 
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