+extern int vppcom_session_recvfrom (uint32_t session_index, void *buffer,
+ uint32_t buflen, int flags,
+ vppcom_endpt_t * ep);
+extern int vppcom_session_sendto (uint32_t session_index, void *buffer,
+ uint32_t buflen, int flags,
+ vppcom_endpt_t * ep);