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<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal">I’ve a use case where libnice client uses different path to send and receive data. The configuration is the following:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>One libnice client (client A) in the corporate intranet.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>One libnice client (client B) connected to big internet by a ADSL/NAT<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>One UDP TURN server reachable from the corporate intranet and from big internet<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Client A and B both allocate a TURN port. The TURN server allocates port 10000 for client A and port 20000 for client B.
<o:p></o:p></p>
<p class="MsoNormal">At the end of the ICE processing libnice select an asymmetric path:
<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>client A sends direct UDP data to port 20000 (port B) at the TURN server and receives data from the TURN server using STUN DataIndication<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>client B sends direct UDP data to port 10000 (port A) at the TURN server and receives data from TURN server using STUN DataIndication <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I don’t understand if asymmetric path is supported by the ICE protocol or is forbidden. What do you think?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The problem is that in this situation libnice doesn’t refresh the TURN CreatePermission because the client is receiving but is not transmitting using STUN/TURN .
<o:p></o:p></p>
<p class="MsoNormal">By the way, in this use case libnice doesn’t always select the same path. Sometimes a symmetrical path is selected, sometimes an asymmetric path is selected.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Livio<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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