Actually Yuriy's..sorry...I see what you are saying.
So my question should be, this means I don't have a choice but to use the ICE candidate between client and kamailio?
On Fri, Dec 4, 2020 at 9:11 AM Andrew Chen achen@fuze.com wrote:
So for Yuriy's comment:
I did issue ICE=force parameter but, as you can see my paste, it's still sending RTP sequence packets to the ICE candidate, which is not what I want to do.
Richard,
So our current setup is this:
SIP client -> kamailio -> freeswitch RTP client -> freeswitch
What I want to accomplish is this:
SIP client -> kamailio -> freeswitch RTP (bypass ICE) client -> rtpengine -> freeswitch
On Fri, Dec 4, 2020 at 3:34 AM Yuriy Gorlichenko ovoshlook@gmail.com wrote:
Hello 2020-12-03T18:05:46.456106+00:00 ashmainkama51 kamailio[22147]: a=candidate:2274611867 1 tcp 1518283007 2001:8a0:78fc:7000:e1d7:e93:3c50:ee71 9 typ host tcptype active generation 0 network-id 2 network-cost 10 is a local candidate sent in the offer from the client ICE=force just says rtpengine: "when you will resend this offer to the receiver, remove all candidates sent by sender and put yourself as the only candidate" But rtpengine still has to follow the ICE check for the received candidates as in that case rtpengine is the receiver and it can't just not check local candidates. That is why you facing this behaviour from the rtpengine, which is totally correct.
In other terms Sender -----------> rtpengine : rtpengine must follow ice procedure and check availability of these local candidates to establish connection between Sender and rtpengine rtpengine ---------> Receiver: rtpengine pretends to be a Sender for the ICE agent of the receiver. but in this term, RTPengine will be the only candidate for this part of the call, so this part is establishing a connection between rtpengine and Receiver
чт, 3 дек. 2020 г. в 23:40, Richard Fuchs rfuchs@sipwise.com:
On 03/12/2020 13.39, Andrew Chen wrote:
Hi all,
I was wondering if someone can help me understand how the ICE parameter works in the rtpengine module works.
So basically our client does an ICE candidate lookup and grabs a list of them and applies it to the INVITE that gets sent to the Kamailio. The list looks like this:
2020-12-03T18:05:46.456030+00:00 ashmainkama51 kamailio[22147]: a=candidate:3373280875 1 udp 2122262783 2001:8a0:78fc:7000:e1d7:e93:3c50:ee71 59827 typ host generation 0 network-id 2 network-cost 10 2020-12-03T18:05:46.456057+00:00 ashmainkama51 kamailio[22147]: a=candidate:3040609428 1 udp 2122197247 2001:8a0:78fc:7000:d979:bf75:dbc0:69f 59828 typ host generation 0 network-id 3 network-cost 10 2020-12-03T18:05:46.456081+00:00 ashmainkama51 kamailio[22147]: a=candidate:1681997092 1 udp 2122129151 192.168.1.66 59829 typ host generation 0 network-id 1 network-cost 10 2020-12-03T18:05:46.456106+00:00 ashmainkama51 kamailio[22147]: a=candidate:2274611867 1 tcp 1518283007 2001:8a0:78fc:7000:e1d7:e93:3c50:ee71 9 typ host tcptype active generation 0 network-id 2 network-cost 10 2020-12-03T18:05:46.456131+00:00 ashmainkama51 kamailio[22147]: a=candidate:4223662180 1 tcp 1518217471 2001:8a0:78fc:7000:d979:bf75:dbc0:69f 9 typ host tcptype active generation 0 network-id 3 network-cost 10 2020-12-03T18:05:46.456155+00:00 ashmainkama51 kamailio[22147]: a=candidate:717406676 1 tcp 1518149375 192.168.1.66 9 typ host tcptype active generation 0 network-id 1 network-cost 10 2020-12-03T18:05:46.456180+00:00 ashmainkama51 kamailio[22147]: a=candidate:2130547417 1 udp 8199935 206.81.191.27 61165 typ relay raddr 85.247.0.121 rport 53091 generation 0 network-id 1 network-cost
10
In the rtpengine_offer, I have this:
rtpengine_offer("ICE=force DTLS=passive replace-session-connection replace-origin external internal");
What i am trying to do is to tell the freeswitch endpoint to use rtpengine as ICE candidate and I see in the SDP this is happening:
a=candidate:6296910676 1 udp 659136 206.81.191.52 52766 typ host generation 0
Btw..206.81.191.52 is a separate AWS instance running rtpengine binary.
On the rtpengine_answer, I tell the remote client side the same thing..use rtpengine as your ICE candidate:
rtpengine_answer("ICE=force DTLS=passive replace-session-connection replace-origin internal external");
and this is snippet from 200 OK:
a=candidate:6296910676 1 udp 659136 206.81.191.52 52766 typ host generation 0
Question:
Why does the rtpengine logs still show that it's trying to use 2001:8a0:78fc:7000:e1d7:e93:3c50:ee71 as RTP candidate in this
scenario?
Dec 3 18:05:47 ashmainrtpe42 rtpengine[8505]: DEBUG: [ep1sbnkk9tikhg4kpmot]: Forward to sink endpoint: 2001:8a0:78fc:7000:e1d7:e93:3c50:ee71:59827 (RTP seq 25423 TS 0)
I thought ICE=force will handle such adjustments so that all rtp is handled by the rtpengine to our client and bypass the STUN server?
Isn't that what's happening? Rtpengine receives media from one peer and forwards it to one of the ICE candidates (presumably the primary one that was negotiated) of the other peer. Or am I misunderstanding what you posted?
Cheers
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-- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ achen@thinkingphones.comfuze.com