[OpenSIPS-Users] OpenSIPS does not reuse existing TLS-connections on outbound requests

[Franz Edler]

Hi all,

I have successfully setup the OpenSIPS v1.5.1 with TLS and registering my
two eyebeam clients for alice and bob is o.k.

The problem is now that on a session setup between both clients OpenSIPS
does not reuse the existing TLS connection for the outbound INVITE request
but sets up a new TCP connection which is terminated by the client.

I see the following logs on the console:
   ERROR:core:tls_connect: SSL_ERROR_SYSCALL err=Success(0)

   ERROR:core:tls_connect: something wrong in SSL: 5 (ret=0) err=Success(0)

   ERROR:core:tcp_send: failed to send

   ERROR:tm:msg_send: tcp_send failed

   ERROR:tm:t_forward_nonack: sending request failed

I have set the "tls_send_timeout" to 120sec and have also enabled SIP
keep-alives at the eyebeam clients. The clients send keep-alives every 30sec
via the TLS connections, but OpenSIPS does not reuse these connections.

Any hints what might be wrong?

Regards
Franz