26 Mar
2014
26 Mar
'14
10:21 a.m.
Ok so if I explicitly route all my VoIP traffic (SIP, RTP, RTCP) to
Kamailio I can distinguish the streams (parse packets, edit packets) and
for example forward these streams to different ports? Thats perfect. Thanks
for all your responses they helped much.
On Wed, Mar 26, 2014 at 8:56 AM, Olle E. Johansson <oej(a)edvina.net> wrote:
On 26 Mar 2014, at 08:44, Cock Ootec <cockootec(a)gmail.com> wrote:
Thanks for your quick reply. So, Kamailio does nothing with RTP/RTCP
packets? I think I understand (now when I think about it) - Kamailio only
handles SIP messages by which in nested SDP two endpoints negotiate the
stream where media will go through?
Yes, that is how the SIP protocol works. Please update yourself on the
protocol which Kamailio is built around.
So RTP/RTCP media stream flow directly between two UA endpoints and
Kamailio has nothing to do with handling of these packets. Could you,
please confirm my thoughts?
Yes.
All right but what if for example we have special UA that sends to
Kamailio specially modified packet (non standard SIP). In my extension of
topoh module I have sanity_checks disabled so will Kamailio check this
packet before my module and drops it or I can receive, modify and forward
this packet? I mean modify this packet to standard SIP packet and forward
it to another UA. I am just asking theoretically because in the moment I
cant try this.
You can modify as much as you want.
/O
On Wed, Mar 26, 2014 at 7:41 AM, Olle E. Johansson <oej(a)edvina.net> wrote:
On 26 Mar 2014, at 01:06, Cock Ootec <cockootec(a)gmail.com> wrote:
Hi,
I'd like to develop module for Kamailio which will be working with
RTP/RTCP packets. Is there any way to capture and edit RTP packet in module
of Kamailio for example in module extended from *topoh*?
Kamailio in itself is a SIP server, often acting as a SIP proxy. The SIP
protocol doesn't handle media, it facilitates setup and management of a
media session. Adding a module for handling media in Kamailio doesn't
really make any sense.
We do have modules that talk to external media servers. Look into those -
like rtpproxy. The Kamailio module itself does not handle media, but
communicates with the other server that in fact manages media relaying.
Before you modify software, you need to understand the architecture :-)
/O
In topoh there are two events SREV_NET_DATA_IN and SREV_NET_DATA_OUT but
I didn't be able to capture any RTP packets by them.
Thanks in advance for any help or useful information.
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