[OpenSIPS-Users] SRTP to RTP

Thu Aug 1 08:57:48 EDT 2019

Can you please share a pcap?

On Thu, 1 Aug 2019 at 13:40, Dragomir Haralambiev <goup2010 at gmail.com>
wrote:

> Hi,
>
> I check this. All like OK. Here is SIP flow
>
> 1. tpengine_offer
>
> UAC1 SRTP ---INVITE ---->  Opensips+rtpengine
> *audio 4004 RTP/SAVP 8 0 18 101*
> $var(rtpengine_flags) = "RTP/AVP replace-session-connection replace-origin
> ICE=remove";
> tpengine_offer("$var(rtpengine_flags)");
> Opensips+rtpengine ----- INVITE --> UAC2 RTP
> *audio 50190 RTP/AVP 8 0 18 101 *
>
> 2. rtpengine_answer when receive 183 (Early Media)
> *audio 15612 RTP/AVP 0 8 18 101*
> Opensips+rtpengine <---- 183 Early Media ---- UAC2 RTP
> $var(rtpengine_flags) = "RTP/SAVP replace-session-connection
> replace-origin ICE=force";
> rtpengine_answer("$var(rtpengine_flags)");
>
> 3. rtpengine_answer when receive 200 OK
> *audio 15612 RTP/AVP 0 8 18 101*
> Opensips+rtpengine <---- 200 OK---- UAC2 RTP
> $var(rtpengine_flags) = "RTP/SAVP replace-session-connection
> replace-origin ICE=force";
> rtpengine_answer("$var(rtpengine_flags)");
> UAC1 <----- 200 OK ----- Opensips+rtpengine
> *audio 50208 RTP/SAVP 0 8 18 101*
>
>
> 4. tpengine_offer when receive re-INVITE
> UAC1 SRTP ---INVITE ---->  Opensips+rtpengine
> *audio 4004 RTP/SAVP 0 101*
> $var(rtpengine_flags) = "RTP/AVP replace-session-connection replace-origin
> ICE=remove";
> tpengine_offer("$var(rtpengine_flags)");
> Opensips+rtpengine ----- INVITE --> UAC2 RTP
> *audio 50190 RTP/AVP 0 101*
>
> На чт, 1.08.2019 г. в 15:16 ч. David Villasmil <
> david.villasmil.work at gmail.com> написа:
>
>> You must check your SDPs, verify all going to srtp is indeed SRTP SDP.
>> And all going to UAC is not SRTP
>>
>> On Thu, 1 Aug 2019 at 11:59, Dragomir Haralambiev <goup2010 at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> 1. tpengine_offer
>>>
>>> UAC1 SRTP ---INVITE ---->  Opensips+rtpengine
>>> $var(rtpengine_flags) = "RTP/AVP replace-session-connection
>>> replace-origin ICE=remove";
>>> tpengine_offer("$var(rtpengine_flags)");
>>> Opensips+rtpengine ----- INVITE --> UAC2 RTP
>>>
>>>
>>> 2. rtpengine_answer when receive 183 (Early Media)
>>> Opensips+rtpengine <---- 183 Early Media ---- UAC2 RTP
>>> $var(rtpengine_flags) = "RTP/SAVP replace-session-connection
>>> replace-origin ICE=force";
>>> rtpengine_answer("$var(rtpengine_flags)");
>>>
>>> 3. rtpengine_answer when receive 200 OK
>>> Opensips+rtpengine <---- 200 OK---- UAC2 RTP
>>> $var(rtpengine_flags) = "RTP/SAVP replace-session-connection
>>> replace-origin ICE=force";
>>> rtpengine_answer("$var(rtpengine_flags)");
>>>
>>> 4. tpengine_offer when receive re-INVITE
>>> UAC1 SRTP ---INVITE ---->  Opensips+rtpengine
>>> $var(rtpengine_flags) = "RTP/AVP replace-session-connection
>>> replace-origin ICE=remove";
>>> tpengine_offer("$var(rtpengine_flags)");
>>> Opensips+rtpengine ----- INVITE --> UAC2 RTP
>>>
>>>
>>> In this case UAC1 SRTP not receive voice.
>>>
>>> Best regards,
>>> Dragomir
>>>
>>> On Wed, Jul 31, 2019, 16:15 David Villasmil <
>>> david.villasmil.work at gmail.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> You need to do this for every leg of the call. This means:
>>>>
>>>> Call from SRTP client TO non-SRTP:
>>>> Remove the ICE, etc.
>>>>
>>>> When the REPLY with the 200 SDP comes back FROM the non-SRTP, you need
>>>> to ADD ICE, etc.
>>>>
>>>> Hope that makes sense
>>>>
>>>> David
>>>>
>>>> On Wed, 31 Jul 2019 at 14:03, Dragomir Haralambiev <goup2010 at gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>> When change the answer flag to
>>>>>
>>>>> $var(rtpengine_flags) = " RTP/SAVP  rtcp-mux-offer ICE=force";
>>>>>  rtpengine_answer("$var(rtpengine_flags)");
>>>>>
>>>>> Call is connected but UAC1 not send and receive voices.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Dragomir
>>>>>
>>>>> На ср, 31.07.2019 г. в 15:53 ч. Sasmita Panda <spanda at 3clogic.com>
>>>>> написа:
>>>>>
>>>>>> Hi Dragomir,
>>>>>>
>>>>>> I had mentioned to modify this according to your requirement .   If
>>>>>> your phone only support RTP/SAVP then change the flag what I have
>>>>>> mentioned  while answering .
>>>>>>
>>>>>>
>>>>>> *Thanks & Regards*
>>>>>> *Sasmita Panda*
>>>>>> *Senior Network Testing and Software Engineer*
>>>>>> *3CLogic , ph:07827611765*
>>>>>>
>>>>>>
>>>>>> On Wed, Jul 31, 2019 at 6:17 PM Johan De Clercq <Johan at democon.be>
>>>>>> wrote:
>>>>>>
>>>>>>> Use rtp/savp
>>>>>>>
>>>>>>> On Wed, 31 Jul 2019, 14:40 Dragomir Haralambiev, <goup2010 at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> Thanks for your replay, but this not working.
>>>>>>>>
>>>>>>>> UAC1 receive 183 session progress with:
>>>>>>>> receive audio 50106 UDP/TLS/RTP/SAVP 0 8 18 101
>>>>>>>>
>>>>>>>> UAC1   send to Opensips CANCEL.
>>>>>>>>
>>>>>>>> I make test with MicroSips latest version.
>>>>>>>>
>>>>>>>> Best regards,
>>>>>>>> Dragomir
>>>>>>>>
>>>>>>>> На ср, 31.07.2019 г. в 15:04 ч. Sasmita Panda <spanda at 3clogic.com>
>>>>>>>> написа:
>>>>>>>>
>>>>>>>>> Hi ,
>>>>>>>>>
>>>>>>>>> You have to do something like below  wherever you are calling
>>>>>>>>> rtpengine_offer/rtpengine_answer.
>>>>>>>>>
>>>>>>>>> $var(rtpengine_flags) = "RTP/AVP replace-session-connection
>>>>>>>>> replace-origin ICE=remove";
>>>>>>>>>  rtpengine_offer("$var(rtpengine_flags)");
>>>>>>>>>
>>>>>>>>> $var(rtpengine_flags) = "UDP/TLS/RTP/SAVP rtcp-mux-offer
>>>>>>>>> ICE=force";
>>>>>>>>>  rtpengine_answer("$var(rtpengine_flags)");
>>>>>>>>>
>>>>>>>>> You can modify this according to your requirement .
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> *Thanks & Regards*
>>>>>>>>> *Sasmita Panda*
>>>>>>>>> *Senior Network Testing and Software Engineer*
>>>>>>>>> *3CLogic , ph:07827611765*
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Wed, Jul 31, 2019 at 5:16 PM Dragomir Haralambiev <
>>>>>>>>> goup2010 at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> Hello,
>>>>>>>>>>
>>>>>>>>>> I have 2 applications connected to Opensips+rtpengine:
>>>>>>>>>> UAC1 -use encryption always. SRTP (RTP/SAVP)
>>>>>>>>>> UAC2 - never use encryption  . RTP (RTP/AVP)
>>>>>>>>>>
>>>>>>>>>> How to setup Opensips to make follow call:
>>>>>>>>>> UAC1 SRTP -----> Opensips+rtpengine -------> UAC2 RTP
>>>>>>>>>>
>>>>>>>>>> Thanks,
>>>>>>>>>> Dragomir
>>>>>>>>>> _______________________________________________
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>>>>>>>>>>
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>>>>>>>>>
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>>>>>
>>>> --
>>>> Regards,
>>>>
>>>> David Villasmil
>>>> email: david.villasmil.work at gmail.com
>>>> phone: +34669448337
>>>> _______________________________________________
>>>> Users mailing list
>>>> Users at lists.opensips.org
>>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>>
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>>>
>> --
>> Regards,
>>
>> David Villasmil
>> email: david.villasmil.work at gmail.com
>> phone: +34669448337
>> _______________________________________________
>> Users mailing list
>> Users at lists.opensips.org
>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
-- 
Regards,

David Villasmil
email: david.villasmil.work at gmail.com
phone: +34669448337
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