Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

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Wilkins, Steve

12 Dec 2017 12 Dec '17

2:38 p.m.

Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

I am unable to get Asterisk to find the correct registered clients, which are registered in Kamailio and am hoping verifying the flow will help give me a clue as to what is going on. E.g. Using chrome and tryit-pjsip I have Client1, and Client2 registered in Kamailio. However when I try to connect Client1 to Client2 (make a call), Asterisk has no clue where Client1 and Cleint2 are registered to.

Thank you!

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Joel Serrano

14 Dec 14 Dec

2:29 p.m.

Hi, can you share with us the asterisk dialplan part where you call the Dial() application?

On Tue, Dec 12, 2017 at 06:38 Wilkins, Steve swwilkins@mitre.org wrote:

...

Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

I am unable to get Asterisk to find the correct registered clients, which are registered in Kamailio and am hoping verifying the flow will help give me a clue as to what is going on. E.g. Using chrome and tryit-pjsip I have Client1, and Client2 registered in Kamailio. However when I try to connect Client1 to Client2 (make a call), Asterisk has no clue where Client1 and Cleint2 are registered to.

Thank you! _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Wilkins, Steve

4:59 p.m.

Hello,

Here is my extentions.conf exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(PJSIP/${EXTEN},30,t) same => n,HangUp()

I have 90001,90002 in pjsip.conf with a webrtc endpoint.

Thank you, -Steve

From: sr-users [mailto:sr-users-bounces@lists.kamailio.org] On Behalf Of Joel Serrano Sent: Thursday, December 14, 2017 9:29 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi, can you share with us the asterisk dialplan part where you call the Dial() application?

On Tue, Dec 12, 2017 at 06:38 Wilkins, Steve <swwilkins@mitre.orgmailto:swwilkins@mitre.org> wrote: Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

Thank you! _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Joel Serrano

15 Dec 15 Dec

6:43 p.m.

Hi Steve,

You mentioned that Kamailio was handling the registration of the clients...

Therefor, you want to do something like this if you want to be able to bridge calls:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/${EXTEN}@<<kamailio-peer>>,30,t) same => n,HangUp()

Another valid format:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/<<kamailio-peer>>/${EXTEN},30,t) same => n,HangUp()

Where "<<kamailio-peer>>" == the name of the peer you configured in sip.conf for Kamailio.

At the end, the key here is that you are calling SIP/XXXX which is not local, if you call PJSIP/XXXX (per your example) you are trying to reach a local endpoint (in this case, the device that would have to be directly registered with Asterisk).

Give a try and let me know how it goes.

Cheers, Joel.

On Thu, Dec 14, 2017 at 8:59 AM, Wilkins, Steve swwilkins@mitre.org wrote:

...

Hello,

Here is my extentions.conf

exten => _900XX,1,Answer()
    same => n,DumpChan()

    same => n,Dial(PJSIP/${EXTEN},30,t)

    same => n,HangUp()
I have 90001,90002 in pjsip.conf with a webrtc endpoint.

Thank you,

-Steve

*From:* sr-users [mailto:sr-users-bounces@lists.kamailio.org] *On Behalf Of *Joel Serrano *Sent:* Thursday, December 14, 2017 9:29 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi, can you share with us the asterisk dialplan part where you call the Dial() application?

On Tue, Dec 12, 2017 at 06:38 Wilkins, Steve swwilkins@mitre.org wrote:

Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

I am unable to get Asterisk to find the correct registered clients, which are registered in Kamailio and am hoping verifying the flow will help give me a clue as to what is going on. E.g. Using chrome and tryit-pjsip I have Client1, and Client2 registered in Kamailio. However when I try to connect Client1 to Client2 (make a call), Asterisk has no clue where Client1 and Cleint2 are registered to.

Thank you!

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Joel Serrano

7:22 p.m.

Hi Steve,

Sorry, I was replying at the same time in another thread and I mixed responses.

Let me correct myself:

You are using:

same => n,Dial(PJSIP/${EXTEN},30,t)

So if someone dials "client1" you would try to reach PJSIP/client1 and that would fail because client1 is not registered with Asterisk.

Let's say your trunk with Kamailio si called "kamailio" in pjsip.conf...

If "client1" is registered with Kamailio instead of Asterisk, you want to send that call to Kamailio:

same => n,Dial(PJSIP/${EXTEN}@kamailio-trunk,30,t)

same => n,Dial(PJSIP/kamailio-trunk/${EXTEN},30,t)

That way, you are sending the call to Kamailio instead of trying to keep it local.

Sorry for the confusion, let me know if you have any doubts.

Joel.

On Fri, Dec 15, 2017 at 10:43 AM, Joel Serrano joel@gogii.net wrote:

...

Hi Steve,

You mentioned that Kamailio was handling the registration of the clients...

Therefor, you want to do something like this if you want to be able to bridge calls:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/${EXTEN}@<<kamailio-peer>>,30,t) same => n,HangUp()

Another valid format:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/<<kamailio-peer>>/${EXTEN},30,t) same => n,HangUp()

Where "<<kamailio-peer>>" == the name of the peer you configured in sip.conf for Kamailio.

At the end, the key here is that you are calling SIP/XXXX which is not local, if you call PJSIP/XXXX (per your example) you are trying to reach a local endpoint (in this case, the device that would have to be directly registered with Asterisk).

Give a try and let me know how it goes.

Cheers, Joel.

On Thu, Dec 14, 2017 at 8:59 AM, Wilkins, Steve swwilkins@mitre.org wrote:

...
Hello,

Here is my extentions.conf

exten => _900XX,1,Answer()
    same => n,DumpChan()

    same => n,Dial(PJSIP/${EXTEN},30,t)

    same => n,HangUp()
I have 90001,90002 in pjsip.conf with a webrtc endpoint.

Thank you,

-Steve

*From:* sr-users [mailto:sr-users-bounces@lists.kamailio.org] *On Behalf Of *Joel Serrano *Sent:* Thursday, December 14, 2017 9:29 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi, can you share with us the asterisk dialplan part where you call the Dial() application?

On Tue, Dec 12, 2017 at 06:38 Wilkins, Steve swwilkins@mitre.org wrote:

Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

I am unable to get Asterisk to find the correct registered clients, which are registered in Kamailio and am hoping verifying the flow will help give me a clue as to what is going on. E.g. Using chrome and tryit-pjsip I have Client1, and Client2 registered in Kamailio. However when I try to connect Client1 to Client2 (make a call), Asterisk has no clue where Client1 and Cleint2 are registered to.

Thank you!

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Wilkins, Steve

8:43 p.m.

Hi Joel,

I have tried this along with setting outbound_proxy. Client2 sees the call from Client1, I click on “Answer” and the call eventually just drops, although the camera showing myself does come on after I click on “Answer”. Others on this board have given it a real try to help, but I fear I am missing some deep concept. Note: I have looked at tcpdumps and asterisk logs for a few weeks now!

Just for grins, here are my test cases.

For the sake of making things a little easier to read I will define – Asterisk Server: AS Kamailio Server KS WebRTC Client1 and Client2 are WebRTC (tryit) instances both using chrome

Test1 (tryit configured to go to AS via wss): Client1 can call Client2; Client2 answers and I can see Audio/Video on both Client1 and Client2 (Success!); The tcpdump (AS) shows no SIP, RTP, SRTP activity, but a lot of UDP activity.

Test2 (tryit configured to go KS via wss): Client1 calls Client2, Client2 rings and show’s “ANSWER” and after I answer Client1 hangs up (Failure!)

Test3 (tryit configured to go KS via wss): Client1 calls an Asterisk Dial-Plan which plays audio and video (Success!)

From: sr-users [mailto:sr-users-bounces@lists.kamailio.org] On Behalf Of Joel Serrano Sent: Friday, December 15, 2017 2:22 PM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi Steve,

Sorry, I was replying at the same time in another thread and I mixed responses.

Let me correct myself:

You are using:

same => n,Dial(PJSIP/${EXTEN},30,t)

So if someone dials "client1" you would try to reach PJSIP/client1 and that would fail because client1 is not registered with Asterisk.

Let's say your trunk with Kamailio si called "kamailio" in pjsip.conf...

If "client1" is registered with Kamailio instead of Asterisk, you want to send that call to Kamailio:

same => n,Dial(PJSIP/${EXTEN}@kamailio-trunk,30,t) same => n,Dial(PJSIP/kamailio-trunk/${EXTEN},30,t)

That way, you are sending the call to Kamailio instead of trying to keep it local.

Sorry for the confusion, let me know if you have any doubts.

Joel.

On Fri, Dec 15, 2017 at 10:43 AM, Joel Serrano <joel@gogii.netmailto:joel@gogii.net> wrote: Hi Steve,

You mentioned that Kamailio was handling the registration of the clients...

Therefor, you want to do something like this if you want to be able to bridge calls:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/${EXTEN}@<<kamailio-peer>>,30,t) same => n,HangUp()

Another valid format:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/<<kamailio-peer>>/${EXTEN},30,t) same => n,HangUp()

Where "<<kamailio-peer>>" == the name of the peer you configured in sip.conf for Kamailio.

Give a try and let me know how it goes.

Cheers, Joel.

On Thu, Dec 14, 2017 at 8:59 AM, Wilkins, Steve <swwilkins@mitre.orgmailto:swwilkins@mitre.org> wrote: Hello,

Here is my extentions.conf exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(PJSIP/${EXTEN},30,t) same => n,HangUp()

I have 90001,90002 in pjsip.conf with a webrtc endpoint.

Thank you, -Steve

From: sr-users [mailto:sr-users-bounces@lists.kamailio.orgmailto:sr-users-bounces@lists.kamailio.org] On Behalf Of Joel Serrano Sent: Thursday, December 14, 2017 9:29 AM To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org> Subject: Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi, can you share with us the asterisk dialplan part where you call the Dial() application?

On Tue, Dec 12, 2017 at 06:38 Wilkins, Steve <swwilkins@mitre.orgmailto:swwilkins@mitre.org> wrote: Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Joel Serrano

9:32 p.m.

Can you send over some captures for test #2?

Well, I’d need the private key to see anything, is this a lab env where you can mess around? If so, share the capture + private key of the certificate used for wss pls. If you cannot, please share the signaling in plain text (you can hide any sensible info, just don’t alter the formats)

Is by any chance the call dropping around 30-32secs after answering?

Is NAT involved anywhere in the test?

On Fri, Dec 15, 2017 at 12:44 Wilkins, Steve swwilkins@mitre.org wrote:

...

Hi Joel,

I have tried this along with setting outbound_proxy. Client2 sees the call from Client1, I click on “Answer” and the call eventually just drops, although the camera showing myself does come on after I click on “Answer”. Others on this board have given it a real try to help, but I fear I am missing some deep concept. Note: I have looked at tcpdumps and asterisk logs for a few weeks now!

Just for grins, here are my test cases.

For the sake of making things a little easier to read I will define –

Asterisk Server: AS

Kamailio Server KS

WebRTC Client1 and Client2 are WebRTC (tryit) instances both using chrome

*Test1* (tryit configured to go to AS via wss): Client1 can call Client2; Client2 answers and I can see Audio/Video on both Client1 and Client2 (*Success*!);

The tcpdump (AS) shows *no* SIP, RTP, SRTP activity, but a lot of UDP activity.

*Test2* (tryit configured to go KS via wss): Client1 calls Client2, Client2 rings and show’s “ANSWER” and after I answer Client1 hangs up ( *Failure*!)

*Test3* (tryit configured to go KS via wss): Client1 calls an Asterisk Dial-Plan which plays audio and video (*Success*!)

*From:* sr-users [mailto:sr-users-bounces@lists.kamailio.org] *On Behalf Of *Joel Serrano

*Sent:* Friday, December 15, 2017 2:22 PM

*To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi Steve,

Sorry, I was replying at the same time in another thread and I mixed responses.

Let me correct myself:

You are using:
    same => n,Dial(PJSIP/${EXTEN},30,t)
So if someone dials "client1" you would try to reach PJSIP/client1 and that would fail because client1 is not registered with Asterisk.

Let's say your trunk with Kamailio si called "kamailio" in pjsip.conf...

If "client1" is registered with Kamailio instead of Asterisk, you want to send that call to Kamailio:
    same => n,Dial(PJSIP/${EXTEN}@kamailio-trunk,30,t)

    same => n,Dial(PJSIP/kamailio-trunk/${EXTEN},30,t)
That way, you are sending the call to Kamailio instead of trying to keep it local.

Sorry for the confusion, let me know if you have any doubts.

Joel.

On Fri, Dec 15, 2017 at 10:43 AM, Joel Serrano joel@gogii.net wrote:

Hi Steve,

You mentioned that Kamailio was handling the registration of the clients...

Therefor, you want to do something like this if you want to be able to bridge calls:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/${EXTEN}@<<kamailio-peer>>,30,t) same => n,HangUp()

Another valid format:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/<<kamailio-peer>>/${EXTEN},30,t) same => n,HangUp()

Where "<<kamailio-peer>>" == the name of the peer you configured in sip.conf for Kamailio.

At the end, the key here is that you are calling SIP/XXXX which is not local, if you call PJSIP/XXXX (per your example) you are trying to reach a local endpoint (in this case, the device that would have to be directly registered with Asterisk).

Give a try and let me know how it goes.

Cheers,

Joel.

On Thu, Dec 14, 2017 at 8:59 AM, Wilkins, Steve swwilkins@mitre.org wrote:

Hello,

Here is my extentions.conf

exten => _900XX,1,Answer()
    same => n,DumpChan()

    same => n,Dial(PJSIP/${EXTEN},30,t)

    same => n,HangUp()
I have 90001,90002 in pjsip.conf with a webrtc endpoint.

Thank you,

-Steve

*From:* sr-users [mailto:sr-users-bounces@lists.kamailio.org] *On Behalf Of *Joel Serrano *Sent:* Thursday, December 14, 2017 9:29 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi, can you share with us the asterisk dialplan part where you call the Dial() application?

On Tue, Dec 12, 2017 at 06:38 Wilkins, Steve swwilkins@mitre.org wrote:

Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

I am unable to get Asterisk to find the correct registered clients, which are registered in Kamailio and am hoping verifying the flow will help give me a clue as to what is going on. E.g. Using chrome and tryit-pjsip I have Client1, and Client2 registered in Kamailio. However when I try to connect Client1 to Client2 (make a call), Asterisk has no clue where Client1 and Cleint2 are registered to.

Thank you!

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Wilkins, Steve

9:49 p.m.

Hi Joel,

When you say signaling, which file/log are you referring too.

I would say the call drops in about 5 -11 seconds.

I do use #!define WITH_NAT in my Kamailio config file. Kamailio and Asterisk are on different servers on the same private network.

Thank you!

From: sr-users [mailto:sr-users-bounces@lists.kamailio.org] On Behalf Of Joel Serrano Sent: Friday, December 15, 2017 4:33 PM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Can you send over some captures for test #2?

Is by any chance the call dropping around 30-32secs after answering?

Is NAT involved anywhere in the test?

On Fri, Dec 15, 2017 at 12:44 Wilkins, Steve <swwilkins@mitre.orgmailto:swwilkins@mitre.org> wrote: Hi Joel,

Just for grins, here are my test cases.

For the sake of making things a little easier to read I will define – Asterisk Server: AS Kamailio Server KS WebRTC Client1 and Client2 are WebRTC (tryit) instances both using chrome

Test2 (tryit configured to go KS via wss): Client1 calls Client2, Client2 rings and show’s “ANSWER” and after I answer Client1 hangs up (Failure!)

Test3 (tryit configured to go KS via wss): Client1 calls an Asterisk Dial-Plan which plays audio and video (Success!)

From: sr-users [mailto:sr-users-bounces@lists.kamailio.orgmailto:sr-users-bounces@lists.kamailio.org] On Behalf Of Joel Serrano Sent: Friday, December 15, 2017 2:22 PM

To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org> Subject: Re: [SR-Users] Flow Diagram for WebRTC Client1 => WebRTC Client2 (via Kamailio and Asterisk)

Hi Steve,

Sorry, I was replying at the same time in another thread and I mixed responses.

Let me correct myself:

You are using:

same => n,Dial(PJSIP/${EXTEN},30,t)

So if someone dials "client1" you would try to reach PJSIP/client1 and that would fail because client1 is not registered with Asterisk.

Let's say your trunk with Kamailio si called "kamailio" in pjsip.conf...

If "client1" is registered with Kamailio instead of Asterisk, you want to send that call to Kamailio:

same => n,Dial(PJSIP/${EXTEN}@kamailio-trunk,30,t) same => n,Dial(PJSIP/kamailio-trunk/${EXTEN},30,t)

That way, you are sending the call to Kamailio instead of trying to keep it local.

Sorry for the confusion, let me know if you have any doubts.

Joel.

On Fri, Dec 15, 2017 at 10:43 AM, Joel Serrano <joel@gogii.netmailto:joel@gogii.net> wrote: Hi Steve,

You mentioned that Kamailio was handling the registration of the clients...

Therefor, you want to do something like this if you want to be able to bridge calls:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/${EXTEN}@<<kamailio-peer>>,30,t) same => n,HangUp()

Another valid format:

exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(SIP/<<kamailio-peer>>/${EXTEN},30,t) same => n,HangUp()

Where "<<kamailio-peer>>" == the name of the peer you configured in sip.conf for Kamailio.

Give a try and let me know how it goes.

Cheers, Joel.

On Thu, Dec 14, 2017 at 8:59 AM, Wilkins, Steve <swwilkins@mitre.orgmailto:swwilkins@mitre.org> wrote: Hello,

Here is my extentions.conf exten => _900XX,1,Answer() same => n,DumpChan() same => n,Dial(PJSIP/${EXTEN},30,t) same => n,HangUp()

I have 90001,90002 in pjsip.conf with a webrtc endpoint.

Thank you, -Steve

Hi, can you share with us the asterisk dialplan part where you call the Dial() application?

On Tue, Dec 12, 2017 at 06:38 Wilkins, Steve <swwilkins@mitre.orgmailto:swwilkins@mitre.org> wrote: Hello All,

I am looking for a Diagram or such that shows the flow of SIP traffic for a WebRTC Client1 => WebRTC Client2 call using Kamailio in front of Asterisk.

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Joel Serrano
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