[SR-Users] Decrypting SRTP with Kamailio + rtpengine

[Alex Balashov]

They can...

On 8/18/20 1:25 PM, Sergey Safarov wrote:
> Thinks 180 Ringing messages do not contain SDP.
> Some misunderstanding present here
> 
> Sergey
> 
> On Tue, Aug 18, 2020 at 9:51 AM Ildar Mukhametzhanov <im at voice-on.de 
> <mailto:im at voice-on.de>> wrote:
> 
>     Hello!
> 
>     __ __
> 
>     Decrypting SRTP with Kamailio + rtpengine.____
> 
>     Hello! I have a task to decrypt SRTP for a legacy switch which
>     doesn’t support it.____
> 
>     Simply adding rtpengine_manage("RTP/AVP") didn’t help. SDP converted
>     from SRTP to RTP while proxying INVITE to legacy switch, but 180
>     Ringing wasn’t converted back to SRTP.____
> 
>     Little more detailed config snippet:
> 
>     __ __
> 
>     route[RELAY] {____
> 
>     ...____
> 
>     if (is_method("INVITE")) {
> 
>     __ __
> 
>     if ($rd=~$var(switch_ip_mask)) {____
> 
>     rtpengine_manage("RTP/AVP");____
> 
>     } else {____
> 
>     rtpengine_manage();____
> 
>     }____
> 
>     ...____
> 
>     }
> 
>     __ __
> 
>     Could someone please advise typical scenarios to achieve it, I
>     suppose the task is pretty standard.
> 
>     __ __
> 
>     Thank you in advance!
> 
>     __ __
> 
>     __ __
> 
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> 
> 
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Alex Balashov | Principal | Evariste Systems LLC

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