<div dir="ltr">Ok Marco,<div>Your concern is with hackers and not misuse! Really valid nowadays!</div><div><br></div><div>Patrick </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 22, 2015 at 8:32 AM, Marco Hierl <span dir="ltr"><<a href="mailto:marco.hierl@mrnetgroup.com" target="_blank">marco.hierl@mrnetgroup.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="DE" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi Patrik,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">thanks for this idea!<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I did not say clear enough: I’m afraid that anybody can cheat us. My intention is to assure that our interconnection partners (or their customers) do not have the possibility to make a conversation without being charged. <u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Sending the indication “a:sendonly” only means, that the client is told not to send RTP, but IF it send RTP anyway then the RTPproxy leads in on to the callee. So, it is not in my hands then!<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Best regards from Hamburg<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> Marco<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a> [mailto:<a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a>] <b>Im Auftrag von </b>Patrick Wakano<br><b>Gesendet:</b> Donnerstag, 22. Januar 2015 11:16<span class=""><br><b>An:</b> OpenSIPS users mailling list<br></span></span></p><div><div class="h5"><b>Betreff:</b> Re: [OpenSIPS-Users] rtpproxy sends rtp from caller to callee before 200OK<u></u><u></u></div></div><p></p><div><div class="h5"><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">Have you tried to insert a "a:sendonly" line in your SDP body when sending it to the caller?<br>If the client receives such line it should not send media...<u></u><u></u></p></div><div><p class="MsoNormal">Then in the 200Ok you can put an "a:sendrecv" line to establish full media path!<u></u><u></u></p></div><div><p class="MsoNormal">It's just an idea, I'm not sure if it will really work...<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Patrick<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div></div><div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">On Thu, Jan 22, 2015 at 6:51 AM, Marco Hierl <<a href="mailto:marco.hierl@mrnetgroup.com" target="_blank">marco.hierl@mrnetgroup.com</a>> wrote:<u></u><u></u></p><div><div><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi Răzvan,</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Ok, thanks for your answer! </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Unfortunately we are offering „early media“ to our customers (call center, radio station, and other companies) and lots of them like to play a free-of-charge announcement in the beginning. But if we started to get cheated, maybe we need to go for this workaround.</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">But apart from that: Mostly the SDP is NOT repeated in the 200OK. Can I call rtpproxy_answer() when receiving the 200OK anyway?</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks and best regards</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> Marco</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a> [mailto:<a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a>] <b>Im Auftrag von </b>Razvan Crainea<br><b>Gesendet:</b> Donners</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">tag, 22. Januar 2015 09:36<br><b>An:</b> <a href="mailto:users@lists.opensips.org" target="_blank">users@lists.opensips.org</a><br><b>Betreff:</b> Re: [OpenSIPS-Users] rtpproxy sends rtp from caller to callee before 200OK</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"> <u></u><u></u></p><div><p class="MsoNormal" style="margin-bottom:12.0pt"><tt><span style="font-size:10.0pt">Hi, Marco!</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br><br><tt>From RTPProxy point of view, you can't differentiate between SIP replies, because for all of them you call the same function - rtpproxy_answer().</tt><br><tt>Now, if the client decides to send RTP for 183 (and indeed, I've seen this several times), there's not that much that you can do. Although it's kind of a hack, all I can think of is to not call rtpproxy_answer() for 180/183 and strip the body to prevent the client from sending RTP directly to the callee.</tt><br><tt>I hope this works for you.</tt><br><br><tt>Best regards,</tt></span><u></u><u></u></p><pre>Răzvan Crainea<u></u><u></u></pre><pre>OpenSIPS Solutions<u></u><u></u></pre><pre><a href="http://www.opensips-solutions.com" target="_blank">www.opensips-solutions.com</a><u></u><u></u></pre><p class="MsoNormal">On 01/21/2015 04:07 PM, Marco Hierl wrote:<u></u><u></u></p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><div><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Dear all,</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">first of all I need to apologize that I was not able to find information about this issue although I’m sure that I’m not the first one complaining!</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The caller is sending an INVITE via OpenSIPS and rtpproxy_offer() is executed, callee answers with REPLY 180 or REPLY 183 (with SDP) and rtpproxy_answer() is made. In this status it should be ok that the rtp stream from callee to caller is transferred via the rtpproxy (e.g. for announcements), but I can see that rtp stream from caller to callee is transferred too!!! This means that there can be a conversation without receiving the 200OK and what is the real problem: that means (at least for me) they can talk to each other without any charging !! A timer will stop the conversion after the a while, but this can take time.</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">How can I overcome this problem? How can prevent RTP to be send to the callee before REPLY 200 is received?</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I can’t find any help in the RTPproxy protocol <a href="http://www.b2bua.org/wiki/RTPproxy/Protocol" target="_blank">http://www.b2bua.org/wiki/RTPproxy/Protocol</a>, nor in the rtpproxy module description in OpenSIPS.</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks for your ideas, and best regards</span><u></u><u></u></p><p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> Marco</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br><br><u></u><u></u></p><pre>_______________________________________________<u></u><u></u></pre><pre>Users mailing list<u></u><u></u></pre><pre><a href="mailto:Users@lists.opensips.org" target="_blank">Users@lists.opensips.org</a><u></u><u></u></pre><pre><a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users" target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><u></u><u></u></pre></blockquote><p class="MsoNormal"> <u></u><u></u></p></div></div></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>_______________________________________________<br>Users mailing list<br><a href="mailto:Users@lists.opensips.org" target="_blank">Users@lists.opensips.org</a><br><a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users" target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p></div></div></div></div></div><br>_______________________________________________<br>
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