Yes you are correct.
Refer to RFC 3261 section 16.3
1. Reasonable syntax check
This protocol is designed to be extended. Future extensions may
define new methods and header fields at any time. An element MUST
NOT refuse to proxy a request because it contains a method or
header field it does not know about.
16.6 Request Forwarding
1. Copy request
The proxy starts with a copy of the received request. The copy
MUST initially contain all of the header fields from the
received request. Fields not detailed in the processing
described below MUST NOT be removed.
Regards,
Ravi Kumar
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-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Vineet
Menon
Sent: Monday, February 06, 2012 8:31 PM
To: Brett Tate
Cc: [email protected]
Subject: Re: [Sip-implementors] Custom Header fields
Hi Mahudeswaran,
Doesn't SIP recommends all proxies to make the custom headers pass i.e
headers which proxies cannot understand!! I have read it a couple of
reputed papers where the authors have implemented their custom enhancement
to SIP using custom headers.
Regards,
Vineet Menon
On 6 February 2012 18:01, Brett Tate <[email protected]> wrote:
> See RFC 5727; it obsoletes or updates some of the related prior RFCs.
>
> > -----Original Message-----
> > From: [email protected] [mailto:sip-
> > [email protected]] On Behalf Of Vineet Menon
> > Sent: Monday, February 06, 2012 2:42 AM
> > To: [email protected]
> > Subject: [Sip-implementors] Custom Header fields
> >
> > Hi All,
> >
> > Can I add any custom headers to extend SIP, if it doesn't interfere
> > with
> > the existing protocol? is there any protocol/procedure to do so?
> >
> > Regards,
> >
> > Vineet Menon
>
>
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