On Fri, Dec 20, 2019 at 3:16 PM Miteshkumar Thakkar <mitesh.thakkar@plivo.com> wrote:

Hi,

After removing media using below code, I am sending offer to rtpengine. RTPEngine is receiving entire SDP. It is receiving media type "image" as well. I have tested again.

KSR.sdpops.remove_media("image")
logger.log("info", "SDP:" .. headers.get("$sdp(body)"))

SDP from RTPEngine log:

=0

o=zt 53655765 2353687637 IN IP4 xxx.xxx.xxx.xxx

s=-

c=IN IP4 xxx.xxx.xxx.xxx

t=0 0

m=image xxxx RTP/AVP udptl t38

a=sendrecv

a=T38FaxVersion:0

a=T38MaxBitRate:14400

a=T38FaxRateManagement:transferredTCF

a=T38FaxMaxBuffer:262

a=T38FaxMaxDatagram:176

a=T38FaxUdpEC:t38UDPRedundancy

m=audio xxxx RTP/AVP 0

a=rtpmap:0 PCMU/8000

On Thu, Dec 19, 2019 at 4:04 PM Henning Westerholt <hw@skalatan.de> wrote:

Hello,

from the logs it looks ok, no error etc..:

3(237) DEBUG: app_lua [app_lua_sr.c:1651]: sr_kemi_lua_exec_func_ex(): param[0] for: remove_media is str: image

3(237) DEBUG: sdpops [sdpops_mod.c:1037]: sdp_remove_media(): attempting to search for media type: [image]

3(237) DEBUG: sdpops [sdpops_mod.c:1053]: sdp_remove_media(): stream 0 of 0 - media [image]

3(237) DEBUG: sdpops [sdpops_mod.c:1061]: sdp_remove_media(): removing media stream: image

3(237) DEBUG: sdpops [sdpops_mod.c:1053]: sdp_remove_media(): stream 1 of 0 - media [audio]

This is probably a more frequest used function from the module. Can you double check if it’s really not removed on the network layer?

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

From: Miteshkumar Thakkar <mitesh.thakkar@plivo.com>
Sent: Thursday, December 19, 2019 11:16 AM
To: Henning Westerholt <hw@skalatan.de>
Cc: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: Re: [SR-Users] KSR.sdpops.remove_media is not working as expected

The log mentioned at https://pastebin.com/5JZmQUfq is by configuring "debug = 4" in kamailio.cfg. Please suggest other way if any, to get more debug logs.

Thank you,

Mitesh

On Thu, Dec 19, 2019 at 3:34 PM Henning Westerholt <hw@skalatan.de> wrote:

Hello,

I see – do you get any error message in the logs? Can you execute it with debug logging activated, the function should output some debug logs about its working.

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

From: Miteshkumar Thakkar <mitesh.thakkar@plivo.com>
Sent: Thursday, December 19, 2019 10:56 AM
To: Henning Westerholt <hw@skalatan.de>
Cc: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: Re: [SR-Users] KSR.sdpops.remove_media is not working as expected

Thank you for your response Henning!

Unfortunately, it is not removed from outgoing message.

True. I also believe that msg_apply_changes is not recommended, hence I am not using that.

Thank you,

Mitesh

On Thu, Dec 19, 2019 at 3:14 PM Henning Westerholt <hw@skalatan.de> wrote:

Hello,

does it actually remove the media after you send the message out? Usually the message altering functions will only be applied when you send out the message due to performance reasons.

You can force it in the cfg with the function “msg_apply_changes” – then you should be able to see it as well in the log. But using this function has other side effects and is not recommended if you don’t need it.

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

From: sr-users <sr-users-bounces@lists.kamailio.org> On Behalf Of Miteshkumar Thakkar
Sent: Tuesday, December 17, 2019 6:53 AM
To: sr-users@lists.kamailio.org
Subject: [SR-Users] KSR.sdpops.remove_media is not working as expected

Hi,

I wants to remove media type "image" from SDP. For that I have tried to use KSR.sdpops.remove_media but it is not working. Not working in the sense that there is no effect of that function on SDP. I am using lua. Kindly find more details below.

Kamailio version: kamailio 5.2.5 (x86_64/linux) 62d35f

SDP to process:

INVITE sip:xxxxxxxxxx@xxxxxxxxx.com:5060 SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK-60823-1-0
From: xxxxxxxxxx <sip: xxxxxxxxxx@ xxxxxxxxxx.com:5060>;tag=xxxxx
To: xxxxxxxxxx <sip: xxxxxxxxxx@ xxxxxxxxxx.com:5060>
Call-ID: 1-60823@172.16.19.64
CSeq: 1 INVITE
Contact: sip:xx@xxxxxxx:5060
Max-Forwards: 70
Content-Type: application/sdp
Content-Length: 337

v=0
o=zt 53655765 2353687637 IN IP4 xxx.xxx.xxx.xxx
s=-
c=IN IP4 xxx.xxx.xxx.xxx
t=0 0
m=image xxxx RTP/AVP udptl t38
a=sendrecv
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:262
a=T38FaxMaxDatagram:176
a=T38FaxUdpEC:t38UDPRedundancy
m=audio xxxx RTP/AVP 0
a=rtpmap:0 PCMU/8000

Code snippet:

KSR.sdpops.remove_media("image")
logger.log("info", "SDP:" .. headers.get("$sdp(body)"))

Log snippet:

https://pastebin.com/5JZmQUfq

One more thing I would like to mention that if I do not use dialog module then the function KSR.sdpops.remove_media works. But I can not avoid using dialog module.

Thanks in advance.

Mitesh