Mohammed,
The SIP OPTIONS request can be used to query capabilities of a UA.
Section 11 of RFC 3261 describes this method.
You can form a 'basic' OPTIONS message to receive the 200 OK
response and look at the Allow and Supported header fields (for example)
to understand the capabilities of the other UA - eg. the presence of
"timer" in the Supported header indicates that the UA is capable of
negotiating SIP Session Expires feature, currently a draft.
Or you may wish to target a specifc query - by including a Require
header and token in the request or including a SDP offer to gauge the UA's
ability to support a certain codec.
Regards,
Wayne Davies
Mohammed Smadi <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
02/09/2004 04:06 AM
To: [EMAIL PROTECTED]
cc:
Subject: [Sip-implementors] newbie question
hi;
i just signed up with this list. Is there an easy way of knowing if a
certain sip UA has implemented a given RFC or method?
_______________________________________________
Sip-implementors mailing list
[EMAIL PROTECTED]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
******************************************************************************
- NOTICE FROM DIMENSION DATA AUSTRALIA
This message is confidential, and may contain proprietary or legally privileged
information. If you have received this email in error, please notify the sender and
delete it immediately.
Internet communications are not secure. You should scan this message and any
attachments for viruses. Under no circumstances do we accept liability for any loss
or damage which may result from your receipt of this message or any attachments.
******************************************************************************
_______________________________________________
Sip-implementors mailing list
[EMAIL PROTECTED]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
