[SR-Users] can't assign values to $fU

[Karthik Srinivasan]

or rather a list of the pseudo vars that fall under the special case;
 assuming this list is smaller.

On Wed, Jun 13, 2018 at 4:05 PM, Karthik Srinivasan <ksriniva2002 at gmail.com>
wrote:

> Henning,
>
> Thanks for the explanation.  This does clear it up for me.
>
> Do you happen to know if there is a list of pseudo vars that fall under
> the non special case?   (a list for those psedo vars where
> msg_apply_changes needs to be called for the update to be reflected while
> in routing file processing that is.)
>
> Thanks,
>
> Karthik
>
> On Wed, Jun 13, 2018 at 1:39 PM, Henning Westerholt <hw at kamailio.org>
> wrote:
>
>> Am Mittwoch, 13. Juni 2018, 20:28:13 CEST schrieb Alex Balashov:
>> > On Wed, Jun 13, 2018 at 01:26:07PM -0500, Karthik Srinivasan wrote:
>> > > Could you explain why we need to call this function when manipulating
>> $fU
>> > > ?
>> >
>> > Some PV manipulations work that way, others don't. :-) "Because
>> > Kamailio".
>>
>> Don't want to dig into to much technical details here..
>>
>> But to give a bit more context, the Kamailio architecture related to SIP
>> message processing is optimized to avoid re-parsing of the message during
>> configuration processing. This works with so called "lumps" which are
>> more or
>> less like a programming patch file (e.g. change, delete parts). This
>> lumps are
>> applied shortly before sending the message out or if you call
>> msg_apply_changes().
>>
>> Some parts of the SIP message are accessed directly, because they are
>> "more
>> important" (like the request URI) are handled specially, some like the
>> From
>> user are done like a normal SIP header part as described above.
>>
>> For a bit more details and to look into the details, have a look to the
>> dbg_sip_msg([log_level], [facility]) function in the debugger module.
>>
>> Best regards,
>>
>> Henning
>>
>>
>
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