25 May
2010
25 May
'10
7:44 a.m.
Am 25.05.2010 12:25, schrieb Anton Roman:
Hi all,
I'm trying to implement a Click2Dial service by using the dlg_bridge
command from the dialog module. Although it works in this case, I found
two problems in the scenario and I would like to read your opinion about
them.
1) Fisrt problem: the REFER generated by Kamailio doesn't contain a
contact header. As per RFC 3515, this request should have a Contact
header. This REFER is not being accepted by a proprietary device. This
is can be worked around with the append_hf() command from the textops
module, but I don know if it is a good solution.
2) The second one arises when the ACK generated by Kamailio, goes
through Kamailio (caller and calle involved in click2dial are registered
on the Kamailio server): the branch of the second via header is not
correctly populated. Its content is '0' when it must be tha same as in
the INVITE.
AFAIK if the ACK is an ACK to a 2xx response, then the ACK is a new
transaction and should have a new branch id.
If 0 is a proper branch id is another question (IIRC it is valid with
RFC2543 but not with 3261).
This is an often raised topic which you can find discussed in the archive.
regards
Klaus