Currently two values are defined:

• NDDS_TRANSPORT_UDPV6_BLOCKING_ALWAYS: Sockets are blocking (default socket options for the operating system).

• NDDS_TRANSPORT_UDPV6_BLOCKING_NEVER: Sockets are modified to make them non-blocking. THIS MAY CAUSE SIGNIFICANT PERFORMANCE PROBLEMS.

[default] NDDS_TRANSPORT_UDPV6_BLOCKING_ALWAYS.