Re: [Sip] Passing added call information in the SIP packet

[todd.d.binns at l-3com.com]

Hi,
   Yes, it (security) does mean a lot to a lot of different people.
Thanks for all the responses.  I am reading the different suggested RFC
& drafts.  My question was more on how can one UA inform another UA that
it wants to make changes to their session/dialog.  In my case the
security will be different, but I want to have one UA initiate the
secure call (change to session/dialog), and the other UA to confirm.  As
stated I can use the X- header since both clients will be custom.  Is
there any other defined way that 2 UA should have this conversation, is
it only defined in the RFC3264? (An offer/answer model with the session
description protocol)

Thanks Again to everyone that made comments,
Todd

-----Original Message-----
From: Dean Willis [mailto:dean.willis at softarmor.com] 
Sent: Wednesday, 23 April, 2008 11:24 PM
To: Binns, Todd D @ HENSCHEL
Cc: sip at ietf.org
Subject: Re: [Sip] Passing added call information in the SIP packet


On Apr 23, 2008, at 12:29 PM, todd.d.binns at l-3com.com wrote:

> Hi,
>    I have been an user of SIP for a while, but never got into the  
> need to extend it.  I have tried to do an extensive research to see  
> if there are any draft or RFC that handles the requirements that I  
> am requested to do.  Here is the scenario that I am trying to fulfill.
>
> A UA (custom hardware/software) wants to place or change the call  
> into a secure call.  It notifies the other participant by an INVITE  
> or NOTIFY and both UA agree on the change and the details of the  
> security.  There are several different method of securing the call,  
> and that would be included in the parameter passed between the UA.   
> If this is not possible is there a way to embed the parameters into  
> the header of the INVITE or NOTIFY so at least both UA know of the  
> request?
>

What do you mean, "secured call"? This term means many different  
things to even more different people.

You might look at:

  http://www.ietf.org/internet-drafts/draft-ietf-sip-sips-08.txt

which has completed working group last call and I'm about to send to  
the IESG, and at:

http://www.ietf.org/internet-drafts/draft-ietf-sip-media-security-requir
ements-04.txt

and

http://www.ietf.org/internet-drafts/draft-ietf-sip-dtls-srtp-framework-0
1.txt

which, if I recall aright, are currently in working group last call.

--
Dean


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