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<span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">Hi everyone, </span><br>
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<br>
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I'm using Kamailio (Ver 5.5.1, Public IP X.X.X.11, Private IP 172.18.0.20) + RTPEngine
<span style="background-color:rgb(255,255,255); display:inline!important">(Ver 9.4.1.1, Public IP X.X.X.7, Private IP 172.18.0.50) </span>alongside Freeswitch <span style="background-color:rgb(255,255,255); display:inline!important">(Private IP 172.18.0.40)</span>
in my backend and delivering calls to a mobile application (call flow is Freeswitch -> Kamailio + RTPEngine -> Applicaiton). While calls made to NATted destination generally works fine - from time to time, we've experiencing one-sided audio due to the rtpengine
sending the media stream to the remote end's private IP instead of his public one. For instance, in the attached logs - media was sent towards 192.168.1.93 instead of 79.179.1.2, which is the expected destination. Problem appears almost randomly; I can make
20 fine calls in a row for the same destination until experiencing it, and I didn't find any difference as it comes to the SIP invite exchange between the two. Has anyone ever experienced the same behavior and can share some general instructions on how to
troubleshoot it?</div>
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Relevant Kamailio config section is attached.</div>
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<b>Invite Kamailio->Device</b></div>
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INVITE sip:972587102881@79.179.1.2:56308;transport=TLS;ob SIP/2.0
<div style="">Record-Route: <sip:X.X.X.11:443;transport=tls;r2=on;lr=on;ftag=cvcHy5UcS9pjj></div>
<div style="">Record-Route: <sip:172.18.0.20:5099;r2=on;lr=on;ftag=cvcHy5UcS9pjj></div>
<div style="">Via: SIP/2.0/TLS X.X.X.11:443;branch=z9hG4bK24bf.52b1dd68e26010ba103bd8d6fdb53cf4.0</div>
<div style="">Via: SIP/2.0/UDP 172.18.0.40;received=172.18.0.40;rport=5060;branch=z9hG4bKH234Q58HpHNKK</div>
<div style="">Max-Forwards: 66</div>
<div style="">From: "972522149596" <sip:FreeSWITCH@172.18.0.20:5099>;tag=cvcHy5UcS9pjj</div>
<div style="">To: <sip:972587102881@172.18.0.20:5099></div>
<div style="">Call-ID: be55bd1e-537d-123a-65a9-0242ac120028</div>
<div style="">CSeq: 37932220 INVITE</div>
<div style="">Contact: <sip:gw+kam-in@172.18.0.40:5060;transport=udp;gw=kam-in;alias=172.18.0.40~5060~1></div>
<div style="">User-Agent: FreeSWITCH-mod_sofia/1.10.6-release+git~20210325T131609Z~1ff9d0a60e~64bit</div>
<div style="">Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY</div>
<div style="">Supported: timer, path, replaces</div>
<div style="">Allow-Events: talk, hold, conference, refer</div>
<div style="">Content-Type: application/sdp</div>
<div style="">Content-Disposition: session</div>
<div style="">Content-Length: 567</div>
<div style="">X-SESSION-ID: 721533765</div>
<div style="">X-INCOMING: PSTN<br>
</div>
<div style="">X-from-freeswitch: +972522149596</div>
<div style="">X-FS-Support: update_display,send_info</div>
<div style="">Remote-Party-ID: "972522149596" <sip:972522149596@172.18.0.20:5099>;party=calling;screen=yes;privacy=off</div>
<div style=""><br>
</div>
<div style="">v=0</div>
<div style="">o=FreeSWITCH 1624937621 1624937622 IN IP4 X.X.X.7</div>
<div style="">s=FreeSWITCH</div>
<div style="">c=IN IP4 X.X.X.7</div>
<div style="">t=0 0</div>
<div style="">m=audio 30018 RTP/AVP 102 101</div>
<div style="">a=rtpmap:102 opus/48000/2</div>
<div style="">a=fmtp:102 useinbandfec=1; maxaveragebitrate=30000; maxplaybackrate=48000; ptime=20; minptime=10; maxptime=40</div>
<div style="">a=rtpmap:101 telephone-event/48000</div>
<div style="">a=fmtp:101 0-16</div>
<div style="">a=sendrecv</div>
<div style="">a=rtcp:30019</div>
<div style="">a=ptime:20</div>
<div style="">a=ice-ufrag:bKPZt0dW</div>
<div style="">a=ice-pwd:H4qyL7mPUOvoiAjosiLasXAdzj</div>
<div style="">a=candidate:41sXGEsTafxHi8ms 1 UDP 2130706431 X.X.X.7 30018 typ host</div>
a=candidate:41sXGEsTafxHi8ms 2 UDP 2130706430 X.X.X.7 30019 typ host<br>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><b>Response Device->Kamailio</b></span><br>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><b><br>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">SIP/2.0 200 OK
<div style="">Via: SIP/2.0/TLS X.X.X.11:443;received=X.X.X.11;branch=z9hG4bK24bf.52b1dd68e26010ba103bd8d6fdb53cf4.0</div>
<div style="">Via: SIP/2.0/UDP 172.18.0.40;rport=5060;received=172.18.0.40;branch=z9hG4bKH234Q58HpHNKK</div>
<div style="">Record-Route: <sip:X.X.X.11:443;transport=tls;lr;r2=on;ftag=cvcHy5UcS9pjj></div>
<div style="">Record-Route: <sip:172.18.0.20:5099;lr;r2=on;ftag=cvcHy5UcS9pjj></div>
<div style="">Call-ID: be55bd1e-537d-123a-65a9-0242ac120028</div>
<div style="">From: "972522149596" <sip:FreeSWITCH@172.18.0.20>;tag=cvcHy5UcS9pjj</div>
<div style="">To: <sip:972587102881@172.18.0.20>;tag=5f75877e-58c2-44f3-a5b3-43f8786c42a1</div>
<div style="">CSeq: 37932220 INVITE</div>
<div style="">Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS</div>
<div style="">Contact: <sip:972587102881@79.179.1.2:56308;transport=TLS;ob></div>
<div style="">Supported: replaces, 100rel, timer, norefersub</div>
<div style="">Content-Type: application/sdp</div>
<div style="">Content-Length: 348</div>
<div style=""><br>
</div>
<div style="">v=0</div>
<div style="">o=- 3833960833 3833960834 IN IP4 192.168.1.93</div>
<div style="">s=pjmedia</div>
<div style="">b=AS:117</div>
<div style="">t=0 0</div>
<div style="">a=X-nat:0</div>
<div style="">m=audio 4002 RTP/AVP 96 120</div>
<div style="">c=IN IP4 192.168.1.93</div>
<div style="">b=TIAS:96000</div>
<div style="">a=rtcp:4003 IN IP4 192.168.1.93</div>
<div style="">a=sendrecv</div>
<div style="">a=rtpmap:96 opus/48000/2</div>
<div style="">a=fmtp:96 useinbandfec=1</div>
<div style="">a=rtpmap:120 telephone-event/48000</div>
<div style="">a=fmtp:120 0-16</div>
a=ssrc:816694098 cname:72cdb5f53fc2e8fb<br>
</span></div>
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<b>Kamailio NAT Detect/Manage Routes</b></div>
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<b>
<pre style="background-color:#ffffff; color:#080808; font-family:'JetBrains Mono',monospace; font-size:9.8pt"><span style="color:#8c8c8c; font-style:italic"># Caller NAT detection<br></span><br>route[NATDETECT] {<br><span style="color:#8c8c8c; font-style:italic">#!ifdef WITH_NAT<br></span> xinfo(<span style="color:#067d17">"NATDETECT: Adding the rport parameter to the first Via header of the received message\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> force_rport()<span style="color:#8c8c8c; font-style:italic">;<br></span> xinfo(<span style="color:#067d17">"NATDETECT: Trying to guess if client's request originated behind a nat. Testing 19.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> if (nat_uac_test(<span style="color:#067d17">"19"</span>)) {<br> if (is_method(<span style="color:#067d17">"REGISTER"</span>)) {<br> xinfo(<span style="color:#067d17">"NATDETECT: REGISTER request. Creating a URI consisting of the source IP, port, and protocol and storing the URI in an Attribute-Value-Pair.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> fix_nated_register()<span style="color:#8c8c8c; font-style:italic">;<br></span> } else {<br> if(is_first_hop()) {<br> xinfo(<span style="color:#067d17">"NATDETECT: Adding an ;alias=ip~port~transport parameter to the contact URI containing the received ip, port, and transport protocol.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> set_contact_alias()<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br> }<br> xinfo(<span style="color:#067d17">"NATDETECT: Setting flag FLT_NATS.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> setflag(FLT_NATS)<span style="color:#8c8c8c; font-style:italic">;<br></span> } else {<br> xinfo(<span style="color:#067d17">"NATDETECT: Didn't detect natted request by any of the given heuristics\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br><span style="color:#8c8c8c; font-style:italic">#!endif<br></span> return<span style="color:#8c8c8c; font-style:italic">;<br></span>}<br><br><span style="color:#8c8c8c; font-style:italic"># RTPProxy control and signaling updates for NAT traversal<br></span>route[NATMANAGE] {<br><span style="color:#8c8c8c; font-style:italic">#!ifdef WITH_NAT<br></span> if (is_request()) {<br> if(has_totag()) {<br> if(check_route_param(<span style="color:#067d17">"nat=yes"</span>)) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: This is a request with to-tag that has 'nat=yes', setting branch flag FLB_NATB.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> setbflag(FLB_NATB)<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br> }<br> }<br><br> if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB))) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: No NAT flag detected for this request\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> return<span style="color:#8c8c8c; font-style:italic">;<br></span> } else {<br> xinfo(<span style="color:#067d17">"NATMANAGE: NAT flag detected for this request\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br><br> if(!is_present_hf(<span style="color:#067d17">"x-purpose"</span>)) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: x-purpose header does not appear in this request, SDP is searched for occurrence of RFC1918 or RFC6598 addresses.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> if(nat_uac_test(<span style="color:#067d17">"8"</span>)) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: Found occurrence of RFC1918 or RFC6598 addresses. Checking if there is a match of source address or uri with an address in the group of the dispatcher-list.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> if(ds_is_from_list()) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: There is a match with an address in the group of the dispatcher-list.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> rtpengine_manage(<span style="color:#067d17">"ICE=force replace-session-connection replace-origin direction=priv direction=pub"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> } else {<br> xinfo(<span style="color:#067d17">"NATMANAGE: No match with an address in the group of the dispatcher-list.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> rtpengine_manage(<span style="color:#067d17">"ICE=force replace-session-connection replace-origin direction=pub direction=priv"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br> } else {<br> xinfo(<span style="color:#067d17">"NATMANAGE: No occurrence of RFC1918 or RFC6598 addresses. Checking if there is a match of source address or uri with an address in the group of the dispatcher-list.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> if(ds_is_from_list()) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: There is a match with an address in the group of the dispatcher-list.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> rtpengine_manage(<span style="color:#067d17">"ICE=force replace-session-connection replace-origin trust-address direction=priv direction=pub"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> } else {<br> xinfo(<span style="color:#067d17">"NATMANAGE: No match with an address in the group of the dispatcher-list.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> rtpengine_manage(<span style="color:#067d17">"ICE=force replace-session-connection replace-origin trust-address direction=pub direction=priv"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br> }<br> }<br><br> if (is_request()) {<br> if (!has_totag()) {<br> if(t_is_branch_route()) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: This is a request without to-tag and top-executed route block is branch_route, adding record route param ;nat=yes.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> add_rr_param(<span style="color:#067d17">";nat=yes"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br> }<br> }<br><br> if (is_reply()) {<br> if(isbflagset(FLB_NATB)) {<br> if(is_first_hop()) {<br> xinfo(<span style="color:#067d17">"NATMANAGE: Adding an ;alias=ip~port~transport parameter to the contact URI containing the received ip, port, and transport protocol.\n"</span>)<span style="color:#8c8c8c; font-style:italic">;<br></span> set_contact_alias()<span style="color:#8c8c8c; font-style:italic">;<br></span> }<br> }<br> }<br><span style="color:#8c8c8c; font-style:italic">#!endif<br></span> return<span style="color:#8c8c8c; font-style:italic">;<br></span>}</pre>
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</b></div>
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<b>RTPEngine Logs</b></div>
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2021-06-29T13:07:05.440658779Z [1624972025.439547] INFO: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Received command 'offer' from 172.18.0.20:53880
<div style="">2021-06-29T13:07:05.440690853Z [1624972025.439641] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Dump for 'offer' from 172.18.0.20:53880: { "supports": [ "load limit" ], "sdp": "v=0</div>
<div style="">2021-06-29T13:07:05.440695330Z o=FreeSWITCH 1624937621 1624937622 IN IP4 172.18.0.40</div>
<div style="">2021-06-29T13:07:05.440698353Z s=FreeSWITCH</div>
<div style="">2021-06-29T13:07:05.440700926Z c=IN IP4 172.18.0.40</div>
<div style="">2021-06-29T13:07:05.440703539Z t=0 0</div>
<div style="">2021-06-29T13:07:05.440706179Z m=audio 34404 RTP/AVP 102 101</div>
<div style="">2021-06-29T13:07:05.440708722Z a=rtpmap:102 opus/48000/2</div>
<div style="">2021-06-29T13:07:05.440711294Z a=fmtp:102 useinbandfec=1; maxaveragebitrate=30000; maxplaybackrate=48000; ptime=20; minptime=10; maxptime=40</div>
<div style="">2021-06-29T13:07:05.440714053Z a=rtpmap:101 telephone-event/48000</div>
<div style="">2021-06-29T13:07:05.440716746Z a=fmtp:101 0-16</div>
<div style="">2021-06-29T13:07:05.440719258Z a=ptime:20</div>
<div style="">2021-06-29T13:07:05.440721823Z ", "ICE": "force", "direction": [ "priv", "pub" ], "replace": [ "session-connection", "origin" ], "call-id": "be55bd1e-537d-123a-65a9-0242ac120028", "received-from": [ "IP4", "172.18.0.40" ], "from-tag": "cvcHy5UcS9pjj",
"command": "offer" }</div>
<div style="">2021-06-29T13:07:05.441069790Z [1624972025.439694] NOTICE: [be55bd1e-537d-123a-65a9-0242ac120028]: [core] Creating new call</div>
<div style="">2021-06-29T13:07:05.441088698Z [1624972025.439809] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Default sink codec is opus/48000/2</div>
<div style="">2021-06-29T13:07:05.441091829Z [1624972025.439815] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Output DTMF payload type is 101</div>
<div style="">2021-06-29T13:07:05.441094966Z [1624972025.439821] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Creating codec handler for opus/48000/2</div>
<div style="">2021-06-29T13:07:05.441097777Z [1624972025.439828] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Sink supports codec opus/48000/2</div>
<div style="">2021-06-29T13:07:05.441100540Z [1624972025.439833] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Using passthrough handler for opus/48000/2</div>
<div style="">2021-06-29T13:07:05.441103390Z [1624972025.439839] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Creating codec handler for telephone-event/48000</div>
<div style="">2021-06-29T13:07:05.441106153Z [1624972025.439844] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Sink supports codec telephone-event/48000</div>
<div style="">2021-06-29T13:07:05.441108913Z [1624972025.439849] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Using passthrough handler for telephone-event/48000</div>
<div style="">2021-06-29T13:07:05.441111679Z [1624972025.440116] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [core] set FILLED flag for stream 172.18.0.40:34404</div>
<div style="">2021-06-29T13:07:05.441124990Z [1624972025.440124] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [core] set FILLED flag for stream 172.18.0.40:34405</div>
<div style="">2021-06-29T13:07:05.441663481Z [1624972025.441074] INFO: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Replying to 'offer' from 172.18.0.20:53880 (elapsed time 0.001414 sec)</div>
<div style="">2021-06-29T13:07:05.441694377Z [1624972025.441103] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Response dump for 'offer' to 172.18.0.20:53880: { "sdp": "v=0</div>
<div style="">2021-06-29T13:07:05.441701068Z o=FreeSWITCH 1624937621 1624937622 IN IP4 X.X.X.7</div>
<div style="">2021-06-29T13:07:05.441706421Z s=FreeSWITCH</div>
<div style="">2021-06-29T13:07:05.441711414Z c=IN IP4 X.X.X.7</div>
<div style="">2021-06-29T13:07:05.441716274Z t=0 0</div>
<div style="">2021-06-29T13:07:05.441721177Z m=audio 30018 RTP/AVP 102 101</div>
<div style="">2021-06-29T13:07:05.441726204Z a=rtpmap:102 opus/48000/2</div>
<div style="">2021-06-29T13:07:05.441731246Z a=fmtp:102 useinbandfec=1; maxaveragebitrate=30000; maxplaybackrate=48000; ptime=20; minptime=10; maxptime=40</div>
<div style="">2021-06-29T13:07:05.441736873Z a=rtpmap:101 telephone-event/48000</div>
<div style="">2021-06-29T13:07:05.441742017Z a=fmtp:101 0-16</div>
<div style="">2021-06-29T13:07:05.441827012Z a=sendrecv</div>
<div style="">2021-06-29T13:07:05.441844744Z a=rtcp:30019</div>
<div style="">2021-06-29T13:07:05.441848881Z a=ptime:20</div>
<div style="">2021-06-29T13:07:05.441852444Z a=ice-ufrag:bKPZt0dW</div>
<div style="">2021-06-29T13:07:05.441856394Z a=ice-pwd:H4qyL7mPUOvoiAjosiLasXAdzj</div>
<div style="">2021-06-29T13:07:05.441860642Z a=candidate:41sXGEsTafxHi8ms 1 UDP 2130706431 X.X.X.7 30018 typ host</div>
<div style="">2021-06-29T13:07:05.441864955Z a=candidate:41sXGEsTafxHi8ms 2 UDP 2130706430 X.X.X.7 30019 typ host</div>
<div style="">2021-06-29T13:07:05.441868967Z ", "result": "ok" }</div>
<div style="">2021-06-29T13:07:07.001082810Z [1624972027.000176] DEBUG: [core] timer run time = 0.000029 sec</div>
<div style="">2021-06-29T13:07:07.817899628Z [1624972027.816949] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] >>> in_ssrc changed for: :0 new: 30adc352
</div>
<div style="">2021-06-29T13:07:07.817932021Z [1624972027.816987] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] >>> out_ssrc changed for 172.18.0.40:34405 new: 30adc352
</div>
<div style="">2021-06-29T13:07:07.817936388Z [1624972027.816998] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [rtcp] Calling handler for RTCP packet type 201</div>
<div style="">2021-06-29T13:07:07.817939853Z [1624972027.817025] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] RR from 30adc352 about 0: FL 0 TL 0 HSR 0 J 0 LSR 0 DLSR 0</div>
<div style="">2021-06-29T13:07:07.817942689Z [1624972027.817030] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] No payload type known for RTCP RR, discarding</div>
<div style="">2021-06-29T13:07:07.817945696Z [1624972027.817036] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [rtcp] Calling handler for RTCP packet type 202</div>
<div style="">2021-06-29T13:07:07.817948500Z [1624972027.817124] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] Forward to sink endpoint: 172.18.0.40:34405</div>
<div style="">2021-06-29T13:07:07.818762433Z [1624972027.817995] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [rtcp] Calling handler for RTCP packet type 201</div>
<div style="">2021-06-29T13:07:07.818790347Z [1624972027.818031] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] RR from 30adc352 about 0: FL 0 TL 0 HSR 0 J 0 LSR 0 DLSR 0</div>
<div style="">2021-06-29T13:07:07.818794422Z [1624972027.818035] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] No payload type known for RTCP RR, discarding</div>
<div style="">2021-06-29T13:07:07.818797834Z [1624972027.818042] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [rtcp] Calling handler for RTCP packet type 202</div>
<div style="">2021-06-29T13:07:07.818801095Z [1624972027.818122] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30019]: [core] Forward to sink endpoint: 172.18.0.40:34405</div>
<div style="">2021-06-29T13:07:07.847992398Z [1624972027.846284] INFO: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Received command 'answer' from 172.18.0.20:47817</div>
<div style="">2021-06-29T13:07:07.848048472Z [1624972027.846325] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Dump for 'answer' from 172.18.0.20:47817: { "supports": [ "load limit" ], "sdp": "v=0</div>
<div style="">2021-06-29T13:07:07.848058346Z o=- 3833960833 3833960834 IN IP4 192.168.1.93</div>
<div style="">2021-06-29T13:07:07.848063378Z s=pjmedia</div>
<div style="">2021-06-29T13:07:07.848067785Z b=AS:117</div>
<div style="">2021-06-29T13:07:07.848071736Z t=0 0</div>
<div style="">2021-06-29T13:07:07.848075782Z a=X-nat:0</div>
<div style="">2021-06-29T13:07:07.848079588Z m=audio 4002 RTP/AVP 96 120</div>
<div style="">2021-06-29T13:07:07.848084210Z c=IN IP4 192.168.1.93</div>
<div style="">2021-06-29T13:07:07.848089110Z b=TIAS:96000</div>
<div style="">2021-06-29T13:07:07.848092756Z a=rtcp:4003 IN IP4 192.168.1.93</div>
<div style="">2021-06-29T13:07:07.848096578Z a=sendrecv</div>
<div style="">2021-06-29T13:07:07.848100173Z a=rtpmap:96 opus/48000/2</div>
<div style="">2021-06-29T13:07:07.848104153Z a=fmtp:96 useinbandfec=1</div>
<div style="">2021-06-29T13:07:07.848108660Z a=rtpmap:120 telephone-event/48000</div>
<div style="">2021-06-29T13:07:07.848112776Z a=fmtp:120 0-16</div>
<div style="">2021-06-29T13:07:07.848116856Z a=ssrc:816694098 cname:72cdb5f53fc2e8fb</div>
<div style="">2021-06-29T13:07:07.848120776Z ", "ICE": "force", "direction": [ "pub", "priv" ], "replace": [ "session-connection", "origin" ], "call-id": "be55bd1e-537d-123a-65a9-0242ac120028", "received-from": [ "IP4", "79.179.1.2" ], "from-tag": "cvcHy5UcS9pjj",
"to-tag": "5f75877e-58c2-44f3-a5b3-43f8786c42a1", "command": "answer" }</div>
<div style="">2021-06-29T13:07:07.848128079Z [1624972027.846411] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Default sink codec is opus/48000/2</div>
<div style="">2021-06-29T13:07:07.848132255Z [1624972027.846418] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Output DTMF payload type is 120</div>
<div style="">2021-06-29T13:07:07.848136164Z [1624972027.846424] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Creating codec handler for opus/48000/2</div>
<div style="">2021-06-29T13:07:07.848139819Z [1624972027.846429] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Sink supports codec opus/48000/2</div>
<div style="">2021-06-29T13:07:07.848143930Z [1624972027.846434] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Using passthrough handler for opus/48000/2</div>
<div style="">2021-06-29T13:07:07.848169208Z [1624972027.846441] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Creating codec handler for telephone-event/48000</div>
<div style="">2021-06-29T13:07:07.848174300Z [1624972027.846445] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Sink supports codec telephone-event/48000</div>
<div style="">2021-06-29T13:07:07.848178752Z [1624972027.846449] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [codec] Using passthrough handler for telephone-event/48000</div>
<div style="">2021-06-29T13:07:07.848183460Z [1624972027.846586] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [core] set FILLED flag for stream 192.168.1.93:4002</div>
<div style="">2021-06-29T13:07:07.848188805Z [1624972027.846593] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [core] set FILLED flag for stream 192.168.1.93:4003</div>
<div style="">2021-06-29T13:07:07.848193111Z [1624972027.846597] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [ice] Shutting down ICE agent (nothing to do)</div>
<div style="">2021-06-29T13:07:07.848197042Z [1624972027.847228] INFO: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Replying to 'answer' from 172.18.0.20:47817 (elapsed time 0.000890 sec)</div>
<div style="">2021-06-29T13:07:07.848201623Z [1624972027.847243] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028]: [control] Response dump for 'answer' to 172.18.0.20:47817: { "sdp": "v=0</div>
<div style="">2021-06-29T13:07:07.848205754Z o=- 3833960833 3833960834 IN IP4 172.18.0.50</div>
<div style="">2021-06-29T13:07:07.848209696Z s=pjmedia</div>
<div style="">2021-06-29T13:07:07.848213446Z b=AS:117</div>
<div style="">2021-06-29T13:07:07.848217361Z t=0 0</div>
<div style="">2021-06-29T13:07:07.848220816Z a=X-nat:0</div>
<div style="">2021-06-29T13:07:07.848224363Z m=audio 30018 RTP/AVP 96 120</div>
<div style="">2021-06-29T13:07:07.848228432Z c=IN IP4 172.18.0.50</div>
<div style="">2021-06-29T13:07:07.848232603Z b=TIAS:96000</div>
<div style="">2021-06-29T13:07:07.848235992Z a=ssrc:816694098 cname:72cdb5f53fc2e8fb</div>
<div style="">2021-06-29T13:07:07.848240381Z a=rtpmap:96 opus/48000/2</div>
<div style="">2021-06-29T13:07:07.848243923Z a=fmtp:96 useinbandfec=1</div>
<div style="">2021-06-29T13:07:07.848247725Z a=rtpmap:120 telephone-event/48000</div>
<div style="">2021-06-29T13:07:07.848386453Z a=fmtp:120 0-16</div>
<div style="">2021-06-29T13:07:07.848395759Z a=sendrecv</div>
<div style="">2021-06-29T13:07:07.848399822Z a=rtcp:30019</div>
<div style="">2021-06-29T13:07:07.848403748Z a=ptime:20</div>
<div style="">2021-06-29T13:07:07.848407203Z a=ice-ufrag:4Q9H38CE</div>
<div style="">2021-06-29T13:07:07.848410827Z a=ice-pwd:OR8EfUn5dCLbhZqyiwsTUOyUdW</div>
<div style="">2021-06-29T13:07:07.848414680Z a=candidate:f75EKiqnFiVfQdoZ 1 UDP 2130706431 172.18.0.50 30018 typ host</div>
<div style="">2021-06-29T13:07:07.848419247Z a=candidate:f75EKiqnFiVfQdoZ 2 UDP 2130706430 172.18.0.50 30019 typ host</div>
<div style="">2021-06-29T13:07:07.848432370Z ", "result": "ok" }</div>
<div style="">2021-06-29T13:07:07.872251466Z [1624972027.871342] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [ice] Created candidate pair f75EKiqnFiVfQdoZ:33d9f4832b3cc9a0:1 between 172.18.0.50 and 172.18.0.40:34404, type prflx</div>
<div style="">2021-06-29T13:07:07.872276197Z [1624972027.871381] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [ice] Triggering check for f75EKiqnFiVfQdoZ:33d9f4832b3cc9a0:1</div>
<div style="">2021-06-29T13:07:07.872286600Z [1624972027.871396] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [ice] ICE pair f75EKiqnFiVfQdoZ:33d9f4832b3cc9a0:1 has been nominated by peer</div>
<div style="">2021-06-29T13:07:07.872289762Z [1624972027.871401] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [ice] ICE not completed yet and no usable candidates</div>
<div style="">2021-06-29T13:07:07.872292668Z [1624972027.871407] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Successful STUN binding request from 172.18.0.40:34404</div>
<div style="">2021-06-29T13:07:07.919668940Z [1624972027.918862] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] >>> in_ssrc changed for: 172.18.0.40:34404 new: 70f328c1
</div>
<div style="">2021-06-29T13:07:07.919698433Z [1624972027.918897] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] >>> out_ssrc changed for 192.168.1.93:4002 new: 70f328c1
</div>
<div style="">2021-06-29T13:07:07.919703321Z [1624972027.918911] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64423 TS 2880)</div>
<div style="">2021-06-29T13:07:07.939554198Z [1624972027.938733] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64424 TS 3840)</div>
<div style="">2021-06-29T13:07:07.959769679Z [1624972027.959017] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64425 TS 4800)</div>
<div style="">2021-06-29T13:07:07.979861917Z [1624972027.979067] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64426 TS 5760)</div>
<div style="">2021-06-29T13:07:07.999566603Z [1624972027.998777] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64427 TS 6720)</div>
<div style="">2021-06-29T13:07:08.019668998Z [1624972028.018802] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64428 TS 7680)</div>
<div style="">2021-06-29T13:07:08.040856248Z [1624972028.039663] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64429 TS 8640)</div>
2021-06-29T13:07:08.061133612Z [1624972028.059847] DEBUG: [be55bd1e-537d-123a-65a9-0242ac120028 port 30018]: [core] Forward to sink endpoint: 192.168.1.93:4002 (RTP seq 64430 TS 9600)<br>
</div>
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