<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">Hello,</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">Until now we had a working audio and page based chat solution with NAT traversal and ICE support. </div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">Now we installed the MSRPRelay on the same machine and we were able to run successful the msrp test application (file tranfer demo) from inside the machine.</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">But trying from outside doesn't work and we see "failure route at sip:test1@192.168.4.182:53481;transport=udp#012 with rcode=0 rreason="</div><div style="font-family: arial, helvetica,
sans-serif; font-size: 10pt; ">error message in the opensips.log. We were trying from outside with Blink Lite and Boghe.</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">The question is: should we modify/update the opensips.cfg for have the MSRPRelay working?</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">See below the relevant fragments from our .cfg file </div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">Thank you,</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">Liviu</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family:
arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space: pre; "> </span>#---- NAT Detection ----#</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><br></font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>force_rport();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (nat_uac_test("19")) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (method=="REGISTER") {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span
class="Apple-tab-span" style="white-space:pre"> </span>fix_nated_register();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>} else {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>append_hf("P-Hint:fix_nated_contact applied\r\n");</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># change the contact information from the private address to the </font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># public address when a request is behind NAT</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif"
size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>fix_nated_contact();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>setflag(5); # caller behind NAT</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><br></font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (has_totag()) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span
class="Apple-tab-span" style="white-space:pre"> </span># sequential request withing a dialog should</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># take the path determined by record-routing</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (loose_route()) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (is_method("BYE")) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>setflag(1); # do accounting ...</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span"
style="white-space:pre"> </span>setflag(3); # ... even if the transaction fails</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>} else if (is_method("INVITE")) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># even if in most of the cases is useless, do RR for</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># re-INVITEs alos, as some buggy clients do change route set</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># during the dialog.</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif"
size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>record_route();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># route it out to whatever destination was set by loose_route()</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># in $du (destination URI).</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>route(1);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre">
</span>} else {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>/* uncomment the following lines if you want to enable presence */</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (is_method("SUBSCRIBE")) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># in-dialog subscribe requests</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>route(2);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>exit;</font></div><div><font
class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if ( is_method("ACK") ) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if ( t_check_trans() ) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># non loose-route, but stateful ACK; must be an ACK after </font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># a 487 or e.g. 404 from upstream server</font></div><div><font class="Apple-style-span"
face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>t_relay();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>exit;</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>} else {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># ACK without matching transaction -></font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># ignore and discard</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span"
style="white-space:pre"> </span>exit;</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>sl_send_reply("404","Not here");</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>exit;</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span
class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2">#Route for user lookups</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2">route[3]{</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (!lookup("location", "m")) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>switch ($retcode) {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre">
</span>case -1:</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>case -3:</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>t_newtran();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>t_reply("404", "Not Found");</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>exit;</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>case -2:</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span
class="Apple-tab-span" style="white-space:pre"> </span>sl_send_reply("405", "Method Not Allowed");</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>exit;</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span># when routing via usrloc, log the missed calls also</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre">
</span>setflag(2);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>route(1);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2">}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><br></font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2">#Route[6] is for NAT</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2">route[6] {</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>#---- RTP Proxy handling ---#</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if (is_method("BYE|CANCEL"))
{</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>end_media_session();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>} else if (is_method("INVITE")){</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>#---- Activates the RTP Proxy for the CALLEE ---#</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>$var(ret) = use_media_proxy();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>if(!($var(ret) == 1)){</font></div><div><font
class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"> log("use_media_proxy returned $var(ret)");</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>}</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>t_on_failure("1");</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>};</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2">}</font></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div></div></div></div></body></html>