26 Mar
2014
26 Mar
'14
4:18 p.m.
No. You can't route the RTP and RTCP traffic to Kamailio, by definition.
You keep asking questions that betray a lack of basic understanding of SIP network
elements. I think you should take Olle's suggestion and learn how it works.
On 26 March 2014 04:21:08 GMT-04:00, Cock Ootec <cockootec(a)gmail.com> wrote:
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:
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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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