Currently two values are defined:
- NDDS_TRANSPORT_UDPV4_BLOCKING_ALWAYS: Sockets are blocking (default socket options for Operating System).
- NDDS_TRANSPORT_UDPV4_BLOCKING_NEVER: Sockets are modified to make them non-blocking. THIS MAY CAUSE SIGNIFICANT PERFORMANCE PROBLEMS.
[default] NDDS_TRANSPORT_UDPV4_BLOCKING_ALWAYS.