Hi,

True, I was thinking only about the "Via" and "Record-Route" added by Kamailio. Didn't know Record-Route had no short form (I was thinking of something like "rr" due to rr module I guess). In this case I suppose there is not much to gain, only from "Via".

I'm facing some fragmentation issues. My goal is to make the SIP packet as small as possible while removing as less SIP headers as I can. I'd still like to use UDP.

Thanks,

Stefan

On Wed, Jul 6, 2016 at 12:48 PM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Record-Route has no compact name variant, afaik -- also quickly checking
the iana assignments, shows the same:

-
http://www.iana.org/assignments/sip-parameters/sip-parameters.xhtml#sip-parameters-2

If smaller size is the target, then Via makes no big difference, so it
was never a goal -- the changes in code should not be big.

A quick option is to redefine MY_VIA in config.h to use the compact form.

A proper option could be introducing a core parameter, adding a new
define for the short version and use the normal or short form a matter
of the parameter value. The function that needs to be changed is
via_builder().

Cheers,
Daniel

On 06/07/16 11:40, Olle E. Johansson wrote:
>> On 06 Jul 2016, at 11:38, Alex Balashov <abalashov@evaristesys.com> wrote:
>>
>> Stefan,
>>
>> The construction of headers is generally the province of the UAs/endpoints of the call. Kamailio understands compact headers, as all compliant SIP stacks do, but it can't singlehandedly reformat them.
> I think the question was about the headers added by Kamailio - Via and Record-Route. Which makes the question perfectly valid :-)
> I can’t remember such a setting anywhere and am curious on why it’s needed.
> /O
>
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--
Daniel-Constantin Mierla
http://www.asipto.com - http://www.kamailio.org
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