RE: [Sip] Questions on Max-Forwards

["manoj mallik" <m.manoj@ipnetfusion.com>]

inline

-----Original Message-----
From: sip-admin@ietf.org [mailto:sip-admin@ietf.org]On Behalf Of Loh Kok
Jeng
Sent: Wednesday, October 23, 2002 7:10 AM
To: Krishna, Samaga; sip@ietf.org
Subject: RE: [Sip] Questions on Max-Forwards


Hi,

Thanks for your reply.  Section 11 says:

   Alternatively, a server receiving an OPTIONS request with a Max-
   Forwards header field value of 0 MAY respond to the request
   regardless of the Request-URI.

Does it mean that a proxy may send 483 instead of 200?

>>>>Manoj: It indicates that if the Request is OPTIONS with Max-Forwards 0,
then it MAY act as final receiptant and respond to the Request irrespective
of the target in Request-URI. i.e even if the Request-URI is not meant for
him, it will respond to that OPTIONS request. It doesn't say about the kind
of Response. However RFC-3261, sec 11.2 Processing of OPTIONS Request, says
that

   "If the response to an OPTIONS is generated by a proxy server, the
   proxy returns a 200 (OK), listing the capabilities of the server.
   The response does not contain a message body."

What if the value of Max-Forwards is outside the permitted range
0-255?  Should a 400 response be sent?

Manoj>>>> This is a good question. I think nothing is mentioned in the RFC
if Max-Forwards is outside the permitted range 0-255. So it is really hard
to say what should be the response, may be it is implementation dependent.

regards,
KJ Loh

> -----Original Message-----
> From: Krishna, Samaga [mailto:samaga.krishna@intel.com]
> Sent: Wednesday, October 23, 2002 5:53 PM
> To: 'Loh Kok Jeng'; sip@ietf.org
> Subject: RE: [Sip] Questions on Max-Forwards
>
>
> Hi Loh,
>  If proxy receives a request with Max-Forward : 1, the proxy
> will decrement
> the count and forward the message.
> If proxy receives the request with Max-Forward: 0, it should
> not forward the
> request. It shall send 483 response. If the request is for
> OPTIONS, proxy
> will act as final recipient and respond to it as in the RFC
> 3261 section 11.
>
>
> have a nice day
> Prasanna
>
>
>
> -----Original Message-----
> From: Loh Kok Jeng [mailto:kokjeng.loh@siemens.com]
> Sent: Wednesday, October 23, 2002 1:00 PM
> To: sip@ietf.org
> Subject: [Sip] Questions on Max-Forwards
>
>
> Dear all,
>
> If a valid SIP message with "Max-Forwards: 1" is received by
> a proxy, should
>
> the proxy decrement Max-Forwards and forward it, or should it
> respond with
> 483?
>
> Likewise, how should the proxy handle a message with with
> Max-Forwards: 0
> or a negative value?
>
> regards,
> KJ Loh
> _______________________________________________
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> This list is for NEW development of the core SIP Protocol
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>
_______________________________________________
Sip mailing list  https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip

_______________________________________________
Sip mailing list  https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip