Another option is to put the uac_replace_from() calls into a branch_route, or a request-route subroutine that is called from a branch_route. The lump changes will then be made on a per-branch basis only and reverted on the next branch.

-- Alex

On 8/7/20 4:41 PM, Sergiu Pojoga wrote:
Calling t_save_lumps() before the changes are made and before t_relay() might help, so that upon failure, Kam restores the SIP message to the original state and then further apply desired changes.

Cheers,
--Sergiu

On Fri, Aug 7, 2020 at 3:39 PM Ilie Soltanici <[email protected] <mailto:[email protected]>> wrote:

    Hello,

    We are using a few carries where we are sending calls to, each of
    them is using a special prefix in the From header in order to manage
    the callerid. Some of them are not recognizing headers like
    P-Asserted-Identity or Remote-Party-ID, so for them we have to
    replace the From header with the corresponding prefix. The way we do
    - it's by using the uac_replace_from function, which works fine.
    The problem is when we are sending the same call to the failover
    trunk, and that trunk is using a different prefix. We have to call
    again the uac_replace_from function which is appending the new
    prefix to the existing one, something like:

    From: <sip:[email protected]:[email protected]>;tag=as404cb50c

    I was trying to use uac_restore_from() function and call again
    uac_replace_from, but the result is the same.

    Is there any way to call the uac_restore_from function twice for the
    same call?
    Thank you.
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Alex Balashov | Principal | Evariste Systems LLC

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