<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:10pt"><div><div><font face="times new roman, new york, times, serif" size="2">In the default FreeSWITCH configuration, I used the webrtc2sip proxy to connect a Chrome 23 client to user 1001. The SIP signaling is fine for REGISTER and INVITE, however FreeSWITCH returns 488 Not Acceptable Here.</font></div><div style="background-color: transparent;"><font size="2">I saw a post on the </font><a rel="nofollow" target="_blank" href="https://groups.google.com/forum/#!forum/doubango" style="color: rgb(102, 17, 204); outline: 0px; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; cursor: pointer; font-family: Arial, Helvetica, sans-serif; white-space: nowrap;">discuss-doubango</a> Google Groups list from July 20 that said:</div><div style="background-color: transparent;"><br></div><div
style="background-color: transparent; font-size: 16px;"><span class="yiv858504526Apple-tab-span" style="white-space: pre;"> </span>"<span style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: 13px;">The problem is not with the crypto its with the a=crypto being inside the AVP vs SAVP (denoting secure)</span></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;"><span class="yiv858504526Apple-tab-span" style="white-space: pre;"> </span>see <a rel="nofollow" target="_blank" href="http://jira.freeswitch.org/browse/FS-636" style="color: rgb(102, 17, 204); outline: 0px; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; cursor: pointer;">http://jira.freeswitch. org/browse/FS-636</a></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial,
Helvetica, sans-serif;"><br></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;"><span class="yiv858504526Apple-tab-span" style="white-space: pre;"> </span>I am willing to lift this restriction or at least make it configurable since the alternative is you must send a double sized sdp with AVP for non secure stuff and SAVP for the secure."</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;"><br></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;">Is there something that I need to configure on FreeSWITCH to remove this restriction? Or, what should be different in the SDP offer from webrtc2sip so that FreeSWITCH will accept it?</div><div
style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;">Below is the output from the FreeSWITCH version command, the SDP offer from webrtc2sip, and FreeSWITCH error message.</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;"><br></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;">Thanks,</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;">- Joel</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;"><br></div><div style="margin: 0px; padding: 0px; border: 0px;
vertical-align: baseline; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif;"><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">version</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"><br></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">FreeSWITCH Version 1.3.8b+git~20121205T191750Z~ 924c524197 (git 924c524 2012-12-05 19:17:50Z)</div></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">. . . . </div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> ----------------------------- ------------------------------ -------------</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">recv 1931 bytes from udp/[10.159.25.56]:10060 at 22:42:51.414083:</div><div
style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> ----------------------------- ------------------------------ -------------</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> INVITE sip:9195@ . . . </div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> . . . </div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> User-Agent: webrtc2sip Media Server 2.0<br></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> P-Preferred-Identity: <sip:webrtc2sip></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"><br></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> v=0</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">
o=doubango 1983 678901 IN IP4 10.159.25.56</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> s=-</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> c=IN IP4 10.159.25.56</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> t=0 0</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> m=audio 60326 RTP/AVP 0 8 101</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> c=IN IP4 10.159.25.56</div><div class="yiv858504526GFBTXDWBG5" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(80, 0, 80);"><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=ptime:20</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">
a=silenceSupp:off - - - -</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=rtpmap:0 PCMU/8000/1</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=rtpmap:8 PCMA/8000/1</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=rtpmap:101 telephone-event/8000/1</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=fmtp:101 0-16</div></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=tcap:1 RTP/SAVP</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=pcfg:1 t=1</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=sendrecv</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=crypto:1
AES_CM_128_HMAC_SHA1_80 inline: CG0ol5gUQjNxOXyMhXSIV2RltFltbx 99IkjHmXsT</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=crypto:2 AES_CM_128_HMAC_SHA1_32 inline:aiZ33ixxaTy5dX5iy72n/ OAORs8lIezYKhuzti6G</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=rtcp-mux</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=ssrc:2783445458 cname:ldjWoB60jbyQlR6e</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=ssrc:2783445458 mslabel:6994f7d1-6ce9-4fbd- acfd-84e5131ca2e2</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=ssrc:2783445458 label:Doubango</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=ice-ufrag:kWutfVwWe7bWeB4</div><div style="margin: 0px; padding: 0px;
border: 0px; vertical-align: baseline;"> a=ice-pwd: ziAr5WnKhzu1KsZsMinJw</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=mid:audio</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=candidate:35wALsfKp 1 udp 2130706431 10.159.25.56 60326 typ host</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=candidate:35wALsfKp 2 udp 2130706430 10.159.25.56 60327 typ host</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=candidate:srflx35wA 2 udp 1694498814 107.21.197.144 60327 typ srflx</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> a=candidate:srflx35wA 1 udp 1694498815 107.21.197.144 60326 typ srflx</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">
----------------------------- ------------------------------ -------------</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">send 400 bytes to udp/[10.159.25.56]:10060 at 22:42:51.414473:</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> ----------------------------- ------------------------------ -------------</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> SIP/2.0 100 Trying</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> . . . </div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> ----------------------------- ------------------------------ -------------</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">2012-12-11 22:42:51.734425 [INFO] mod_dialplan_xml.c:498 Processing 1001
<1001>->9195 in context default</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">-> 2012-12-11 22:42:51.894429 [ERR] sofia_glue.c:4922 a=crypto in RTP/AVP, refer to rfc3711</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">2012-12-11 22:42:51.894429 [NOTICE] switch_channel.c:3484 Hangup sofia/internal/1001@. . . </div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> [CS_EXECUTE] [INCOMPATIBLE_DESTINATION]</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">send 924 bytes to udp/[10.159.25.56]:10060 at 22:42:52.054746:</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> ----------------------------- ------------------------------ -------------</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> SIP/2.0 488 Not
Acceptable Here</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> Via: SIP/2.0/UDP 10.159.25.56:10060;branch= z9hG4bK1356314285436;rport= 10060</div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"><br></div><div style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">NOTE: I hacked the webrtc2sip to send "a=tcap:1 RTP/SAVP" rather than "a=tcap:1 RTP/SAVPF", but as you can see, no luck; same result either way.</div><div><br></div></div></div></div></body></html>