11 Oct
2016
11 Oct
'16
10:06 a.m.
We do have a strange behavior while using UACreg module and rtpengine.
So far we used uacreg to register to an external pbx and we are using rtpenginde since we
do not know if there is NAT on the far side. With an kamailio 4.4.2 there are no problems
doing this. Now we tried to update to 4.4.3 and 5 (latest) we do see an issue with this
two modules.
Problem we have is on an basic call while DA chellange. By using DA catching from uac
module and an updated SDP from rptengine the uac module seems to crash and the DA
chellange (unauth) gets forwarded to the calling side instead of answered by the uac
Module.
it seems the DA chellange is causeing the problem but only if the original invite was
modified by RTP engine.
in the logs i can see this happening:
```
f94ea564de0806c4a811bce674@xx.xx.120.5:5060 Status: <null> <null> F:user
T:123 R:123] Remote asked for authentication
Oct 11 16:02:11 gaudino /usr/sbin/kamailio[8342]: ERROR: <core>
[msg_translator.c:417]: clen_builder(): no message body found (missing crlf?)
Oct 11 16:02:11 gaudino /usr/sbin/kamailio[8342]: ERROR: <core>
[msg_translator.c:1963]: build_req_buf_from_sip_req(): Error while adjusting
Content-Length
Oct 11 16:02:11 gaudino /usr/sbin/kamailio[8342]: ERROR: tm [t_fwd.c:462]:
prepare_new_uac(): could not build request
Oct 11 16:02:11 gaudino /usr/sbin/kamailio[8342]: ERROR: tm [t_fwd.c:1723]:
t_forward_nonack(): ERROR: t_forward_nonack: failure to add branches
Oct 11 16:02:11 gaudino /usr/sbin/kamailio[8342]: ERROR: tm [tm.c:1415]: _w_t_relay_to():
ERROR: w_t_relay_to: t_relay_to failed
```
When i disable the rtpengine the problem does not occur as well as the kamailio 4.4.2 did
not have this issue.
I can provide config, traces and debug logs (via mail) please tell me where to send.
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