I have a problem with DTLS-SRTP and I don’t know where to search. I tested two windows PCs with LinPhone 3.11.1 calling each other with DTLS active and the call works fine. The key exchange is ok and in wireshark everything works fine.
Now I have an external device with OpenSSL 1.0.2 and PjProject 2.9. I try to establish a call between the LinPhone and my external device. The LinPhone send the invite and the external device sends the following “client hello” message that
could not be processed by the LinPhone. There is also no SRTP communication between them. After a specific time the external device sends a bye because of a RTP underrun. So my question is now if this is a problem in LinPhone (Something is no supported) or
if the external device sends an incorrect message?!