hello Sergey

yes i was using them with a IAM ISUP part inside the SIP response, so they were doing something, but it's not correct so it must be an ACM, ANM depending on the response.
i made some more tests and i saw the issue is not with append_body_part which seems it's doing ok.

it's with set_body_multipart when in responses seems cannot detect the body last boundary and close it by -- so the ISUP is malformed

i could workaround this by parsing the body and adding it

route[SIPISUP] {
    msg_apply_changes();
    set_body_multipart();
    msg_apply_changes();
    $var(isup) = "\x06\x12\x25\x01\x39\x02\x12\x01\x00";
    append_body_part("$var(isup)","application/isup;version=itu-t92+","signal;handling=optional");
    msg_apply_changes();
    $avp(s:xxxx) = $rb;
    $var(xxxx) = $(avp(s:xxxx){re.subst,/(.*)--unique-boundary-1(.*)/\1--unique-boundary-1--\2/sg});
    set_body("$var(xxxx)","multipart/mixed;boundary=\"unique-boundary-1\"");
}

this way at least we have a base ISUP part for a 1XX response

best regards
david




El lun, 07-11-2016 a las 23:08 +0200, Sergey Basov escribió: 
Hi David,

if you look at source code of the sipt module
https://github.com/kamailio/kamailio/blob/master/modules/sipt/sipt.c

functions sipt_destination & sipt_set_calling works only for ISUP_IAM.

But as I know from my tests ISUP encapsulation must be only in invite,
and is optional for other messages.
--
Best regards,
Sergey Basov                     e-mail: sergey.v.basov@gmail.com

tel: (+38067) 403-62-54


2016-11-07 19:19 GMT+02:00 david <descartin@bts.io>:
> hello all
>
> i'm using kam version 4.4.1 and i would like to generate an ISUP part on the
> 1xx,2xx responses to a remote carrier since the fsw i send the calls to
> cannot handle ISUP SDP.
> despite seeing in the doc that those functions cannot be used there and only
> in  REQUEST_ROUTE, FAILURE_ROUTE, BRANCH_ROUTE, i tried and it works....
> partially, because it seems it doesnt create the last boundary and it
> creates a next boundary with an empty "Encapsulated multipart part: "
>
> this the the route i call from onreply_route
>
> route[SIPISUP] {
>     set_body_multipart();
>     msg_apply_changes();
>     $var(isup) =
> "\x01\x12\x49\x01\x0a\x03\x02\x0a\x08\x84\x90\x33\x41\x72\x17\x01\x06\x0a\x08\x04\x13\x93\x70\x21\x73\x23\x10\x08\x01\x01\x00";
>
> append_body_part("$var(isup)","application/isup;version=itu-t92+","signal;handling=optional");
>     msg_apply_changes();
>     sipt_destination($rU, 31, 4);
>     sipt_set_calling($fU, 4, 0, 3);
>     msg_apply_changes();
> }
>
> am i doing something wrong? how can i set this to end the SDP with last
> boundary?
>
> thanks a lot and regards
> david
>
>
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