Hello,
I tried to use sipdump, but I sniffs 0 packets always
---------------------------------------------------------------------
peter@asterisk-PBX:~/webrtc-sip-gw$ sudo sipdump -i ens18 test.txt
SIPdump 0.2 ---------------------------------------
* Using dev 'ens18' for sniffing * Starting to sniff with packet filter 'tcp or udp'
* Exiting, sniffed 0 logins
---------------------------------------------
with tcpdump I see SIP packets on this interface
--------------------------------------------------------
19:06:55.576860 IP asterisk-PBX.sip > _gateway.sip: SIP: INVITE sip:**72@speedport.ip SIP/2.0 19:06:55.576883 IP asterisk-PBX > _gateway: udp 19:06:55.627829 IP raspberrypi.netbios-ns > 192.168.2.255.netbios-ns: UDP, length 50 19:06:55.641900 IP asterisk-PBX.ssh > ..34892: Flags [P.], seq 397832:398476, ack 397, win 545, options [nop,nop,TS val 1148946433 ecr 1770360766], length 644 19:06:55.642356 IP ..34892 > asterisk-PBX.ssh: Flags [.], ack 398476, win 11040, options [nop,nop,TS val 1770360870 ecr 1148946433], length 0 19:06:55.746216 IP asterisk-PBX.ssh > ..34892: Flags [P.], seq 398476:398816, ack 397, win 545, options [nop,nop,TS val 1148946537 ecr 1770360870], length 340 19:06:55.746560 IP ..34892 > asterisk-PBX.ssh: Flags [.], ack 398816, win 11062, options [nop,nop,TS val 1770360974 ecr 1148946537], length 0 19:06:55.784725 ARP, Request who-has 192.168.2.203 tell _gateway, length 46
---------------------------------------------------------------
I also tried on the interface docker0, but the same result I run webrtc-sip-gw in a docker container
Regards
Peter Am 07.08.25 um 18:42 schrieb Fred Posner via sr-users:
Check out sipdump module to grab that traffic.
Regards,
Fred Posner
On Aug 7, 2025, at 11:35 AM, peter walber via sr-userssr-users@lists.kamailio.org 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
INVITEsip:**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:2http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time a=extmap:3http://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-userssr-users@lists.kamailio.org Sent: Donnerstag, 7. August 2025 09:56 To:sr-users@lists.kamailio.org Cc: Peter Walberpeter.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 fromsip:**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 fromsip:**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] tosip:**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 fromsip:**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 fromsip:**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 fromsip:**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] tosip:**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 fromsip:**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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