Ranjit,
I see you cross posted this proposal to multiple lists. There is large
overlap in readership of those lists, so this creates a mess. I'm going
to reply here, because this is the best place for such a query.
Please see inline below.
On 10/29/19 12:05 AM, Ranjit Avasarala wrote:
Hello all
Many times I experienced scenarios where SIP requests (e.g. INVITE, PUBLISH
or PRACK or any other) have either invalid parameters in the header or a
particular header is missing in the request or the header value is
incomplete. Some e.gs are
- SIP Route header in INVITE contains additional "lr" parameter.
Ideally, "lr" parameter needs to be associated with a particular route -
i.e. sip URI
- the Accept header is missing in SIP PUBLISH
- the Allow header misses UPDATE method
- ..... many more
Currently, in all the above cases the SIP Proxy server that receives the
request, responds with a 400 Bad Request.
Though 400 Bad Request is acceptable given that there is some issue in the
SIP request, a more detailed error would be more useful - as sometimes
interpreting 400 Bad Request is harder
You can use the Reason-Phrase in the 400 response to clarify what you
are complaining about. This should be sufficient to help a developer to
diagnose the issue and fix it. It won't be sufficient to all a
preprogrammed reaction in the UAC, but I don't see that as a reasonable
expectation for problems like this.
Thanks,
Paul
E.g.
a 4xx Invalid header/parameter may be more appropriate with reason
E.g. if there is additional "lr" parameter in SIP INVITE, then the proxy
can return a 4xx Invalid Header/parameter with Reason: SIP code=4xx;
Text="Invalid lr parameter in Route header"
Let me know your thoughts on if this proposal can be taken forward as an
Internet draft.
Thank you
Ranjit
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
