Yes,
Proxies should respect ALL headers.
Or more generally, if a proxy doesn't understand a header
it should forward it on.
This is the only way for SIP to work for future headers.
Regards,
Attila
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Avasarala
Ranjit-A20990
Sent: 09 February 2009 10:16
To: Iñaki Baz Castillo
Cc: [email protected]
Subject: Re: [Sip-implementors] "Reason-Header" in CANCEL throughvariousproxies
True it is not specified in the RFC 3326, but I feel the behavior of proxies
should be such that they respect the custom headers in a BYE or CANCEL, unless
privacy issues forbid them.
Regards
Ranjit
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Iñaki Baz
Castillo
Sent: Monday, February 09, 2009 3:43 PM
Cc: [email protected]
Subject: Re: [Sip-implementors] "Reason-Header" in CANCEL through variousproxies
2009/2/9 Avasarala Ranjit-A20990 <[email protected]>:
> When pbx generates a CANCEL towards proxy_B, it should insert the Reason
> header as Reason:SIP; cause=200;text="Call completed at alice phone". So here
> proxy_B should respect Reason header in CANCEL - so proxy_B should copy the
> Reason header when it generates CANCEL to bob's phone - This way Bob's phone
> will understand that call completed elsewhere - not sure where though!!
>
> So ideally if an incoming CANCEL request contains Reason header, it should
> not be stripped off and carried by intermediate proxies till the final
> destination.
Thanks, but I wonder: where is it specified? I've never read that a proxy
should respect "custom" headers in a CANCEL (note that CANCEL is hop by hop, so
there is no theoricall requeriment to respect custom headers).
Thanks.
--
Iñaki Baz Castillo
<[email protected]>
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