Hello, I am sending in attach a pcap with a call between two webrtc clients, that reproduces this scenario. I am using as example the configuration at https://github.com/havfo/WEBRTC-to-SIP . I apply this change on the kamailio configuration to reproduce this scenario:
@@ -350,6 +350,8 @@ request_route {
# authentication
route(AUTH);
+ sdp_keep_codecs_by_name("VP8","video");
+ msg_apply_changes();
# record routing for dialog forming requests (in case they are
routed)
# - remove preloaded route headers
remove_hf("Route");
Without this change, I can make calls between two webrtc clients.
Thanks for your help, so far.
Best regards,
Jose Lopes
On Mon, May 11, 2020 at 10:21 AM José Lopes <[email protected]>
wrote:
> Hello,
>
> Sorry, I forgot to mention that, between the call of the two webrtc
> clients, there is a B2BUA that only supports SIP UDP and RTP, so I need to
> use rtpengine to translate from DTLS/SRTP to RTP.
> I will try to make a call between the two webrtc clients and only use
> kamailio without rtpengine to limit the issue.
>
> Os melhores cumprimentos / Best regards,
>
> *José Lopes*
> Research and Development Technician
>
> Phone: +351 256 370 980
> Email: [email protected]
>
>
> On Tue, May 5, 2020 at 5:15 PM Juha Heinanen <[email protected]> wrote:
>
>> This 488 think reminds me that SIP over webrtc is broken.
>>
>> Webrtc UAS (at least JsSIP) cannot issue 488 before the UAS has started
>> to ring. It is very frustrating for the callee to get such a spam ring.
>>
>> RFC3261 section "8.2 UAS Behavior" tells:
>>
>> Note that request processing is atomic. If a request is accepted,
>> all state changes associated with it MUST be performed. If it is
>> rejected, all state changes MUST NOT be performed.
>>
>> So it is against the standard to issue 180 and after that reject the
>> request with 488.
>>
>> -- Juha
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> [email protected]
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>
Zlk2u0KrhbeJJ0F69FYWe5Plv.pcap
Description: application/vnd.tcpdump.pcap
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