Hi Fuad, without going too far in kamailio's internals, a resume route is equivalent to a failure route and, as such, it operates on a "fake" fresh message. One solution is to use msg_apply_changes() but my general advice is that all headers and sdp mangling (aka rtpengine invocations) should be done in branch routes, especially if your routing logic includes async routes/failure routes.

Federico

On Mon, Mar 28, 2022 at 1:20 PM Fuad Trle trle.fuad@gmail.com wrote:

Hi Henning,

I have tried this, but without success. *This function can be used from REQUEST_ROUTE or core REPLY_ROUTE.* t_newtrans & http_async_query force me to enter a new routing block and call fail with "500 I'm terribly sorry, server error occurred (1/TM)". There is no explicit exit at the end of route(HTTP) but for some reason execution stopped and did not continue in request_route.

I don't think I can fulfil those requirements (call function in request route and before record_route). Suspend is the last option (after location lookup and parallel forking).

On Sun, Mar 27, 2022 at 10:51 PM Henning Westerholt hw@gilawa.com wrote:

...

Hello,

if you are not seeing them in the configuration later on directly, this is expected: https://www.kamailio.org/wiki/tutorials/faq/main#why_changes_made_to_headers...

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

*From:* sr-users sr-users-bounces@lists.kamailio.org *On Behalf Of *Fuad Trle *Sent:* Friday, March 25, 2022 4:08 PM *To:* sr-users@lists.kamailio.org *Subject:* [SR-Users] t_suspend / t_continue & insert_hf

Hello,

I'm inserting some headers after getting value from http_async_query. If a call is relayed, I see them. But If I t_suspend and t_continue call (before time out), I do not see added headers. Here is flow:

route(START)

t_newtran();

#.. prep for query

http_async_query("url","HTTP");

route(HTTP)

#.. collect and using data from query

insert_hf("$var(key): $var(value)\r\n");

t_store();

if (registered("location") {

route(RELAY);

} else {

t_suspend();

exit;

}

route(AWAKE)

t_continue();

I see that the branch index ($T_branch_idx) is 0 at start. 1 after http query, +1 if there is forking or location. +1 after t_suspend. It looks like t_continue uses a branch with index after t_suspend. I tried with t_save_lumps() to carry over changes.

Any idea how to do this?

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