Re: [SR-Users] RTPEngine Intermittent One Way Audio Issue SRTP => RTP

The following is from the logfile showing a successful call ##### Call 1 - Normal ##### Feb 6 16:15:52 kamailio rtpengine[22145]: [1449147586-14407-219(a)BJC.BGI.B.BAF port 47732] Confirmed peer address as 172.16.52.4:18678 Feb 6 16:15:52 kamailio rtpengine[22145]: [1449147586-14407-219(a)BJC.BGI.B.BAF port 47742] Confirmed peer address as 86.188.176.25:49570 Feb 6 16:15:54 kamailio rtpengine[22145]: Got valid command from 127.0.0.1:42444: offer - { "sdp": "v=0 o=TimDesk1 8000 8000 IN IP4 192.168.1.105 s=SIP Call c=IN IP4 192.168.1.105 t=0 0 m=audio 12508 RTP/SAVP 8 13 0 9 2 101 a=sendrecv a=rtpmap:8 PCMA/8000 a=ptime:20 a=rtpmap:13 CN/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:9 G722/8000 a=rtpmap:2 G726-32/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:juFBDXlbHNk9v4q7MZgFyBeBueoCqrqYI+6B4NX6|2^32 a=crypto:2 AES_CM_128_HMAC_SHA1_32 inline:zGPcDnBVaYwupku4YXxQZkVo6P5S6qkMgsz7BKzQ|2^32 ", "direction": [ "external", "internal" ], "replace": [ "origin", "session-connection" ], "transport-protocol": "RTP/AVP", "call-id": "1251269203-14407-220@BJC.BGI.B.BAF<mailto:1251269203-14407-220@BJC.BGI.B.BAF>", "received-from": [ "IP4", "86.188.176.25" ], "from-tag": "822158480", "command": "offer" } Feb 6 16:15:54 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF] Creating new call Feb 6 16:15:54 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF] Opened ports 47752..47753 for media relay Feb 6 16:15:54 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF] Opened ports 47768..47769 for media relay Feb 6 16:15:54 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF] Returning to SIP proxy: d3:sdp553:v=0 o=TimDesk1 8000 8000 IN IP4 172.16.52.71 s=SIP Call c=IN IP4 172.16.52.71 t=0 0 a=ice-lite m=audio 47752 RTP/AVP 8 13 0 9 2 101 a=rtpmap:8 PCMA/8000 a=ptime:20 a=rtpmap:13 CN/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:9 G722/8000 a=rtpmap:2 G726-32/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=sendrecv a=rtcp:47753 a=ice-ufrag:0iPdqfhF a=ice-pwd:jcloLJi39nobxVX7HtpKtTMt9zFA a=candidate:hgovvroVet3HALus 1 UDP 2130706431 172.16.52.71 47752 typ host a=candidate:hgovvroVet3HALus 2 UDP 2130706430 172.16.52.71 47753 typ host 6:result2:oke Feb 6 16:16:00 kamailio rtpengine[22145]: Got valid command from 127.0.0.1:37264: answer - { "sdp": "v=0 o=CiscoSystemsSIP-GW-UserAgent 556 4215 IN IP4 172.16.52.4 s=SIP Call c=IN IP4 172.16.52.4 t=0 0 m=audio 18682 RTP/AVP 8 101 c=IN IP4 172.16.52.4 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 ", "direction": [ "internal", "external" ], "replace": [ "origin", "session-connection" ], "transport-protocol": "RTP/SAVP", "call-id": "1251269203-14407-220@BJC.BGI.B.BAF<mailto:1251269203-14407-220@BJC.BGI.B.BAF>", "received-from": [ "IP4", "172.16.52.4" ], "from-tag": "822158480", "to-tag": "9019F813-2671", "command": "answer" } Feb 6 16:16:00 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF] Returning to SIP proxy: d3:sdp586:v=0 o=CiscoSystemsSIP-GW-UserAgent 556 4215 IN IP4 123.123.123.123 s=SIP Call c=IN IP4 123.123.123.123 t=0 0 a=ice-lite m=audio 47768 RTP/SAVP 8 101 c=IN IP4 123.123.123.123 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 a=sendrecv a=rtcp:47769 a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:s8Q/XEjCiBU7AA7yo5P9KFYhiZrcs1RPUpV/cArM a=ice-ufrag:ILsVPyrj a=ice-pwd:nE1g27xxJH0rzWwamuxbAtHid9b2 a=candidate:TUErwQDNDzRhCQkj 1 UDP 2130706431 123.123.123.123 47768 typ host a=candidate:TUErwQDNDzRhCQkj 2 UDP 2130706430 123.123.123.123 47769 typ host 6:result2:oke Feb 6 16:16:02 kamailio rtpengine[22145]: Got valid command from 127.0.0.1:39817: answer - { "sdp": "v=0 o=CiscoSystemsSIP-GW-UserAgent 556 4215 IN IP4 172.16.52.4 s=SIP Call c=IN IP4 172.16.52.4 t=0 0 m=audio 18682 RTP/AVP 8 101 c=IN IP4 172.16.52.4 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 ", "direction": [ "internal", "external" ], "replace": [ "origin", "session-connection" ], "transport-protocol": "RTP/SAVP", "call-id": "1251269203-14407-220@BJC.BGI.B.BAF<mailto:1251269203-14407-220@BJC.BGI.B.BAF>", "received-from": [ "IP4", "172.16.52.4" ], "from-tag": "822158480", "to-tag": "9019F813-2671", "command": "answer" } Feb 6 16:16:02 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF] Returning to SIP proxy: d3:sdp586:v=0 o=CiscoSystemsSIP-GW-UserAgent 556 4215 IN IP4 123.123.123.123 s=SIP Call c=IN IP4 123.123.123.123 t=0 0 a=ice-lite m=audio 47768 RTP/SAVP 8 101 c=IN IP4 123.123.123.123 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 a=sendrecv a=rtcp:47769 a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:s8Q/XEjCiBU7AA7yo5P9KFYhiZrcs1RPUpV/cArM a=ice-ufrag:ILsVPyrj a=ice-pwd:nE1g27xxJH0rzWwamuxbAtHid9b2 a=candidate:TUErwQDNDzRhCQkj 1 UDP 2130706431 123.123.123.123 47768 typ host a=candidate:TUErwQDNDzRhCQkj 2 UDP 2130706430 123.123.123.123 47769 typ host 6:result2:oke Feb 6 16:16:06 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF port 47752] Confirmed peer address as 172.16.52.4:18682 Feb 6 16:16:06 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF port 47768] Confirmed peer address as 86.188.176.25:12508 Feb 6 16:16:06 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF port 47768] No support for kernel packet forwarding available Feb 6 16:16:06 kamailio rtpengine[22145]: [1251269203-14407-220(a)BJC.BGI.B.BAF port 47752] No support for kernel packet forwarding available From: sr-users [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Tim Chubb Sent: 07 February 2015 08:10 To: Kamailio (SER) - Users Mailing List Subject: [SR-Users] RTPEngine Intermittent One Way Audio Issue SRTP => RTP Hi, I am currently experiencing an intermittent one way audio issue, when using RTPEngine and proxying between srtp and rtp. There is no apparent pattern, I have managed to repeat the on the 7th, 23rd, and 63rd calls to a test number, where upon connection only audio in the RTP => SRTP direction was working. All other test calls worked as normal. Digging through the RTPEngine log file the only abnormalities I can see are: Discarded invalid SRTP packet: authentication failed entries on the calls that had the one way audio issue. What could be causing this? Thanks Tim.