Hi,


I can imagine that the problems come from the configuration within the docker container. IP address and ports are somehow automatically defined and  I'm not sure if these paramerts are correct. And I can not enter the routing scripts for HOMER intergration in the docker container.

Therefore , I want to install and run kamailio with rtpengine directly outside a docker container on my debian vm.

But I'm pretty much confused by the default kamailio configuration file with all the parameters, directives and loadmodules.

Can somebody send me a basic configuration file for kamailio with websockets, TLS Support and rtpengine.

Thanks and regards

Peter
Am 07.08.25 um 19:24 schrieb Richard Robson via sr-users:

Hi,

You could run up a Homer server and send the traffic to there from Kamailio with the sipcapture module. It should give you the ingress and egress packets unencrypted from the script.

Hope that helps

Richard

On 07/08/2025 17:35, peter walber via sr-users wrote:

Hello,


I can use wireshark to capture and filter packets now. But the payload ist encrypted and I don't know how to decrypt the app-data.

I can observe a lot of packets which are trevelling from the SIP Client to the webrtc-sip-gw. But can not decrypt the payload.


I have opened the network console of google chrom. I can see that the client starts the SIP request using JsSIP

**72 is my doorbird

**73 is my openhab SIP Client

---------------------------------------------------------


INVITE sip:**72@speedport.ip SIP/2.0
Via: SIP/2.0/WSS r64og133ol2n.invalid;branch=z9hG4bK2639027
Max-Forwards: 69
To: <sip:**72@speedport.ip>
From: <sip:**73@speedport.ip>;tag=0l5gn2o04p
Call-ID: k57isvj3jnib42sone96
CSeq: 6684 INVITE
Contact: <sip:gpmhi027@r64og133ol2n.invalid;transport=ws;ob>
Content-Type: application/sdp
Allow: INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY
Supported: ice,replaces,outbound
User-Agent: JsSIP 3.10.1
Content-Length: 1705
 v=0
o=- 8248900579316048806 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE 0
a=extmap-allow-mixed
a=msid-semantic: WMS c8e94492-8d01-4aa1-9023-497510a9054b
m=audio 43416 UDP/TLS/RTP/SAVPF 111 63 9 0 8 13 110 126
c=IN IP4 192.168.2.151
a=rtcp:9 IN IP4 0.0.0.0
a=candidate:1715666646 1 udp 2122260223 192.168.2.151 43416 typ host generation 0 network-id 1
a=candidate:2923572520 1 udp 2122194687 172.17.0.1 34664 typ host generation 0 network-id 2
a=candidate:2565352002 1 tcp 1518280447 192.168.2.151 9 typ host tcptype active generation 0 network-id 1
a=candidate:1357445564 1 tcp 1518214911 172.17.0.1 9 typ host tcptype active generation 0 network-id 2
a=ice-ufrag:vZWG
a=ice-pwd:NWYzQwxQ4nP4FdcL6XpCl66/
a=ice-options:trickle
a=fingerprint:sha-256 80:22:F4:1E:B4:94:EF:F8:44:FA:E9:CA:72:DA:75:F3:99:1F:10:8D:B4:11:B3:65:3D:F9:44:67:28:31:CB:E5
a=setup:actpass
a=mid:0
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid
a=sendrecv
a=msid:c8e94492-8d01-4aa1-9023-497510a9054b 8cd550e3-9b06-4e06-af55-f31b5392bafd
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:111 opus/48000/2
a=rtcp-fb:111 transport-cc
a=fmtp:111 minptime=10;useinbandfec=1
a=rtpmap:63 red/48000/2
a=fmtp:63 111/111
a=rtpmap:9 G722/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:13 CN/8000
a=rtpmap:110 telephone-event/48000
a=rtpmap:126 telephone-event/8000
a=ssrc:1295466586 cname:7i+lr9FQ7qgsLxhh
a=ssrc:1295466586 msid:c8e94492-8d01-4aa1-9023-497510a9054b 8cd550e3-9b06-4e06-af55-f31b5392bafd
---------------------------------------------

But I also see the obviously  kamilio responding with timeout

------------------------------------------------------------------------------------------

SIP/2.0 408 Request Timeout
Via: SIP/2.0/WSS r64og133ol2n.invalid;branch=z9hG4bK2315704;rport=58076;received=192.168.2.151
To: <sip:**73@speedport.ip>;tag=5532e97d005227a861814c798ae9fc63-c1c00000
From: <sip:**73@speedport.ip>;tag=kfjl6vah0u
Call-ID: p928jbnb7d2spbvdgoepjt
CSeq: 1 REGISTER
Server: kamailio (5.6.3 (x86_64/linux))
Content-Length: 0
 --------------------------------------------------------------------

does it help to analyse ?

Regards

Peter


Am 07.08.25 um 14:07 schrieb Henning Westerholt via sr-users:

Hello,

 

have a look e.g. with tcpdump and wireshark what exactly happens. Maybe the connection is closed from one party. Sometimes TCP keep-alive or SIP REGISTER time intervals needs to be adapted to keep a connection open, e.g. in NAT scenarios.

 

Cheers,

 

Henning

 

From: Peter Walber via sr-users <sr-users@lists.kamailio.org>
Sent: Donnerstag, 7. August 2025 09:56
To: sr-users@lists.kamailio.org
Cc: Peter Walber <peter.walber@t-online.de>
Subject: [SR-Users] problems using kamailio

 

Hello,

 

I try to use kamailio as webrtc-sip-gateway between my openhab smart home system and my doorbird doorbell with phone and camera.

I try to use the product of "https://github.com/florian-h05/webrtc-sip-gw". Which integrates kamailio together with rtpengine to the gateway.

I want to use openhab as SIP Client and have a Telekom Speedport Smart 4 Router on the other side. The webrtc-sip-gw from florian-h05 shall be the software between Openhab and the speedport smart 4. On the speedport smart router the SIP Server is enabled and configured. I can sucessfully call with zoiper extern phone numbers. The doorbird als is configured correctly. I can call the doorbird with my zioper softphone using the SIP interface of the doorbird. The runtime system is a  docker container on debian 12.  

I want to call the doorbird by SIP from my openhab SIP client.

I can initiate the call, but it doesn't establish

Here is the log from the docker container.

---------------------------------------------------------------------------------------------------
2025-08-07T07:46:57.384687165Z  9(52) INFO: <script>: HTTP Request Received
2025-08-07T07:46:57.391479050Z  9(52) INFO: <script>: START: REGISTER from sip:**73@speedport.ip (IP:192.168.2.185:39510)
2025-08-07T07:46:57.391516534Z  9(52) INFO: <script>: Current Contact header: <sip:v0fds0hl@fe8ojuo7pnkl.invalid;transport=ws>;+sip.ice;reg-id=1;+sip.instance="<urn:uuid:243e461d-f0cb-4c09-9a63-f57c9bba8d6b>";expires=600
2025-08-07T07:46:57.391526535Z  9(52) INFO: <script>: Setting new Contact header: <sip:**73@192.168.2.209:5060>
2025-08-07T07:47:00.195739350Z  9(52) INFO: <script>: START: INVITE from sip:**73@speedport.ip (IP:192.168.2.185:39510)
2025-08-07T07:47:00.195800424Z  9(52) INFO: <script>: Current Contact header: <sip:v0fds0hl@fe8ojuo7pnkl.invalid;transport=ws;ob>
2025-08-07T07:47:00.195811886Z  9(52) INFO: <script>: Setting new Contact header: <sip:v0fds0hl@fe8ojuo7pnkl.invalid;transport=ws;ob;alias=192.168.2.185~39510~6;alias=192.168.2.185~39510~6>
2025-08-07T07:47:00.196163528Z  9(52) INFO: <script>: MANAGE_BRANCH: New branch [0] to sip:**72@speedport.ip
2025-08-07T07:47:00.196181228Z  9(52) INFO: <script>: NATMANAGE branch_id:0 ruri: sip:**72@speedport.ip, method:INVITE, status:<null>, extra_id: z9hG4bK44082210, rtpengine_manage: replace-origin replace-session-connection via-branch=extra rtcp-mux-demux SDES-off ICE=remove RTP/AVP
2025-08-07T07:47:00.196608235Z INFO: [penvq8f06ehafutk9ivf]: [control] Received command 'offer' from 127.0.0.1:50790
2025-08-07T07:47:00.196625247Z NOTICE: [penvq8f06ehafutk9ivf]: [core] Creating new call
2025-08-07T07:47:00.198519843Z INFO: [penvq8f06ehafutk9ivf]: [control] Replying to 'offer' from 127.0.0.1:50790 (elapsed time 0.001979 sec)
2025-08-07T07:47:01.927528447Z  9(52) INFO: <script>: START: CANCEL from sip:**73@speedport.ip (IP:192.168.2.185:39510)
2025-08-07T07:47:01.927577111Z  9(52) INFO: <script>: Current Contact header: <null>
2025-08-07T07:47:01.927586439Z  9(52) INFO: <script>: Setting new Contact header: <null>
2025-08-07T07:47:09.169489716Z  7(50) INFO: <script>: WebSocket connection from 192.168.2.185:39510 has closed
2025-08-07T07:47:27.355185671Z  2(45) WARNING: tm [../../core/forward.h:203]: msg_send_buffer(): TCP/TLS connection for WebSocket could not be found
2025-08-07T07:47:27.914769340Z  9(52) INFO: <script>: HTTP Request Received
2025-08-07T07:47:27.951608347Z  9(52) INFO: <script>: START: REGISTER from sip:**73@speedport.ip (IP:192.168.2.185:44816)
2025-08-07T07:47:27.951663073Z  9(52) INFO: <script>: Current Contact header: <sip:lebth4eq@fe8ojuo7pnkl.invalid;transport=ws>;+sip.ice;reg-id=1;+sip.instance="<urn:uuid:39eac0ca-0aea-4526-a5c7-0516bc8a2d71>";expires=600
2025-08-07T07:47:27.951915520Z  9(52) INFO: <script>: Setting new Contact header: <sip:**73@192.168.2.209:5060>
2025-08-07T07:47:30.168546446Z  2(45) INFO: <script>: BRANCH FAILED: z9hG4bK4408221 + 0INFO: [penvq8f06ehafutk9ivf]: [control] Received command 'delete' from 127.0.0.1:36296
2025-08-07T07:47:30.168587880Z INFO: [penvq8f06ehafutk9ivf]: [core] Deleting call branch '' (via-branch 'z9hG4bK44082210')
2025-08-07T07:47:30.168597011Z INFO: [penvq8f06ehafutk9ivf]: [core] Call branch '' (via-branch 'z9hG4bK44082210') deleted, no more branches remaining
2025-08-07T07:47:30.168605215Z INFO: [penvq8f06ehafutk9ivf]: [core] Deleting entire call
2025-08-07T07:47:30.168612883Z INFO: [penvq8f06ehafutk9ivf]: [core] Final packet stats:
2025-08-07T07:47:30.168620604Z INFO: [penvq8f06ehafutk9ivf]: [core] --- Tag 'utenlull77', created 0:30 ago for branch ''
2025-08-07T07:47:30.168628359Z INFO: [penvq8f06ehafutk9ivf]: [core] ---     subscribed to ''
2025-08-07T07:47:30.168636445Z INFO: [penvq8f06ehafutk9ivf]: [core] ---     subscription for ''
2025-08-07T07:47:30.168645446Z INFO: [penvq8f06ehafutk9ivf]: [core] ------ Media #1 (audio over UDP/TLS/RTP/SAVPF) using unknown codec
2025-08-07T07:47:30.168653691Z INFO: [penvq8f06ehafutk9ivf]: [core] --------- Port   192.168.2.209:23484 <>   192.168.2.185:60650, SSRC 0, 0 p, 0 b, 0 e, 30 ts
2025-08-07T07:47:30.168661939Z INFO: [penvq8f06ehafutk9ivf]: [core] --- Tag '', created 0:30 ago for branch 'z9hG4bK44082210'
2025-08-07T07:47:30.168669844Z INFO: [penvq8f06ehafutk9ivf]: [core] ---     subscribed to 'utenlull77'
2025-08-07T07:47:30.168677713Z INFO: [penvq8f06ehafutk9ivf]: [core] ---     subscription for 'utenlull77'
2025-08-07T07:47:30.168685661Z INFO: [penvq8f06ehafutk9ivf]: [core] ------ Media #1 (audio over RTP/AVP) using unknown codec
2025-08-07T07:47:30.168693705Z INFO: [penvq8f06ehafutk9ivf]: [core] --------- Port   192.168.2.209:23472 <>                :0    , SSRC 0, 0 p, 0 b, 0 e, 30 ts
2025-08-07T07:47:30.168718608Z INFO: [penvq8f06ehafutk9ivf]: [core] --------- Port   192.168.2.209:23473 <>                :0     (RTCP), SSRC 0, 0 p, 0 b, 0 e, 30 ts
2025-08-07T07:47:30.168728065Z INFO: [penvq8f06ehafutk9ivf]: [control] Replying to 'delete' from 127.0.0.1:36296 (elapsed time 0.000505 sec)
2025-08-07T07:47:30.169042099Z  2(45) INFO: <script>: Failure: <null> 2(45) WARNING: tm [../../core/forward.h:203]: msg_send_buffer(): TCP/TLS connection for WebSocket could not be found
2025-08-07T07:47:30.265075785Z  9(52) INFO: <script>: START: INVITE from sip:**73@speedport.ip (IP:192.168.2.185:44816)
2025-08-07T07:47:30.265125134Z  9(52) INFO: <script>: Current Contact header: <sip:lebth4eq@fe8ojuo7pnkl.invalid;transport=ws;ob>
2025-08-07T07:47:30.265135557Z  9(52) INFO: <script>: Setting new Contact header: <sip:lebth4eq@fe8ojuo7pnkl.invalid;transport=ws;ob;alias=192.168.2.185~44816~6;alias=192.168.2.185~44816~6>
2025-08-07T07:47:30.265484502Z  9(52) INFO: <script>: MANAGE_BRANCH: New branch [0] to sip:**72@speedport.ip
2025-08-07T07:47:30.265664116Z  9(52) INFO: <script>: NATMANAGE branch_id:0 ruri: sip:**72@speedport.ip, method:INVITE, status:<null>, extra_id: z9hG4bK16860370, rtpengine_manage: replace-origin replace-session-connection via-branch=extra rtcp-mux-demux SDES-off ICE=remove RTP/AVP
2025-08-07T07:47:30.265819591Z INFO: [412n0o8dedgair81t70p]: [control] Received command 'offer' from 127.0.0.1:50790
2025-08-07T07:47:30.265979425Z NOTICE: [412n0o8dedgair81t70p]: [core] Creating new call
2025-08-07T07:47:30.267497852Z INFO: [412n0o8dedgair81t70p]: [control] Replying to 'offer' from 127.0.0.1:50790 (elapsed time 0.001599 sec)
2025-08-07T07:47:30.469565385Z  9(52) INFO: <script>: START: CANCEL from sip:**73@speedport.ip (IP:192.168.2.185:44816)
2025-08-07T07:47:30.469629711Z  9(52) INFO: <script>: Current Contact header: <null>
2025-08-07T07:47:30.469645116Z  9(52) INFO: <script>: Setting new Contact header: <null>
2025-08-07T07:47:41.207672567Z  7(50) INFO: <script>: WebSocket connection from 192.168.2.185:44816 has closed
2025-08-07T07:47:57.917754216Z  2(45) WARNING: tm [../../core/forward.h:203]: msg_send_buffer(): TCP/TLS connection for WebSocket could not be found
2025-08-07T07:48:00.230412646Z  2(45) INFO: <script>: BRANCH FAILED: z9hG4bK1686037 + 0INFO: [412n0o8dedgair81t70p]: [control] Received command 'delete' from 127.0.0.1:36296
2025-08-07T07:48:00.230457143Z INFO: [412n0o8dedgair81t70p]: [core] Deleting call branch '' (via-branch 'z9hG4bK16860370')
2025-08-07T07:48:00.230466718Z INFO: [412n0o8dedgair81t70p]: [core] Call branch '' (via-branch 'z9hG4bK16860370') deleted, no more branches remaining
2025-08-07T07:48:00.230475640Z INFO: [412n0o8dedgair81t70p]: [core] Deleting entire call
2025-08-07T07:48:00.230483968Z INFO: [412n0o8dedgair81t70p]: [core] Final packet stats:
2025-08-07T07:48:00.230491909Z INFO: [412n0o8dedgair81t70p]: [core] --- Tag 'hc7h5imu96', created 0:30 ago for branch ''
2025-08-07T07:48:00.230518917Z INFO: [412n0o8dedgair81t70p]: [core] ---     subscribed to ''
2025-08-07T07:48:00.230528302Z INFO: [412n0o8dedgair81t70p]: [core] ---     subscription for ''
2025-08-07T07:48:00.230537387Z INFO: [412n0o8dedgair81t70p]: [core] ------ Media #1 (audio over UDP/TLS/RTP/SAVPF) using unknown codec
2025-08-07T07:48:00.230545867Z INFO: [412n0o8dedgair81t70p]: [core] --------- Port   192.168.2.209:23400 <>   192.168.2.185:46431, SSRC 0, 0 p, 0 b, 0 e, 30 ts
2025-08-07T07:48:00.230554949Z INFO: [412n0o8dedgair81t70p]: [core] --- Tag '', created 0:30 ago for branch 'z9hG4bK16860370'
2025-08-07T07:48:00.230563124Z INFO: [412n0o8dedgair81t70p]: [core] ---     subscribed to 'hc7h5imu96'
2025-08-07T07:48:00.230570851Z INFO: [412n0o8dedgair81t70p]: [core] ---     subscription for 'hc7h5imu96'
2025-08-07T07:48:00.230578827Z INFO: [412n0o8dedgair81t70p]: [core] ------ Media #1 (audio over RTP/AVP) using unknown codec
2025-08-07T07:48:00.230587091Z INFO: [412n0o8dedgair81t70p]: [core] --------- Port   192.168.2.209:23494 <>                :0    , SSRC 0, 0 p, 0 b, 0 e, 30 ts
2025-08-07T07:48:00.230595631Z INFO: [412n0o8dedgair81t70p]: [core] --------- Port   192.168.2.209:23495 <>                :0     (RTCP), SSRC 0, 0 p, 0 b, 0 e, 30 ts
2025-08-07T07:48:00.230603868Z INFO: [412n0o8dedgair81t70p]: [control] Replying to 'delete' from 127.0.0.1:36296 (elapsed time 0.000253 sec)
2025-08-07T07:48:00.230753116Z  2(45) INFO: <script>: Failure: <null> 2(45) WARNING: tm [../../core/forward.h:203]: msg_send_buffer(): TCP/TLS connection for WebSocket could not be found

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

especially the bold lines  confuse me. Why is the TCP/TLS closed and can not be found ? Could that be the problem ?

 

Thanks for some help and best regards

Peter


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