[OpenSIPS-Users] codec_delete_except_re() has no effect

[Răzvan Crainea]

Hi, Jeff!

Unfortunately you can't use both rtpengine and codec_delete_*, that's 
because each change different buffers. The codec_delete_* function runs 
on the initial SDP received, then rtpengine completely overwrites the 
SDP with whatever rtpengine replied.
The only way you can do something like this (although it may be very 
ugly) is to store the rtpengine reply in a pvar using the 3rd[1] 
parameter of the rtpengine_* functions and perform some text replaces[2] 
on it, then replace the body "manually".

[1] 
http://www.opensips.org/html/docs/modules/2.3.x/rtpengine.html#rtpengine.f.rtpengine_offer
[2] http://www.opensips.org/html/docs/modules/2.3.x/textops#idp5907728

Best regards,

Răzvan Crainea
OpenSIPS Solutions
www.opensips-solutions.com

On 04/18/2017 06:49 PM, Jeff Pyle wrote:
> Hello,
>
> This is on OpenSIPS 2.3, downloaded from git and compiled today.
>
> An INVITE arrives over TLS with the following SDP:
>
> v=0
> o=- 1492528621 1492528621 IN IP4 172.22.202.191
> s=Polycom IP Phone
> c=IN IP4 172.22.202.191
> t=0 0
> m=audio 16852 RTP/SAVP 115 9 0 8 110 18 127
> a=rtpmap:115 G7221/32000
> a=fmtp:115 bitrate=48000
> a=rtpmap:9 G722/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:110 iLBC/8000
> a=fmtp:110 mode=20
> a=rtpmap:18 G729/8000
> a=fmtp:18 annexb=no
> a=rtpmap:127 telephone-event/8000
> a=rtcp:16853
> a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:[stripped]
> a=setup:actpass
> a=fingerprint:sha-1 [stripped]
> m=audio 16888 RTP/AVP 115 9 0 8 110 18 127
> a=rtpmap:115 G7221/32000
> a=fmtp:115 bitrate=48000
> a=rtpmap:9 G722/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:110 iLBC/8000
> a=fmtp:110 mode=20
> a=rtpmap:18 G729/8000
> a=fmtp:18 annexb=no
> a=rtpmap:127 telephone-event/8000
> a=rtcp:16889
>
> I run
>   codec_delete_expect_re(PCMU|PCMA|telephone-event)
> but it doesn't have any effect.  The INVITE leaving after t_relay() 
> over UDP to localhost on a different port is the same as when it came 
> in (with the exception of the c= line because of rtpengine).
>
> At log_level=6 the only log entry I see is
>   DBG:sipmsgops:create_codec_lumps: creating 0 streams
>
> I'm not sure where to go from here.
>
>
> - Jeff
>
>
>
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