Configure UDP Transport ======================= .. highlight:: c You may need to configure the UDP transport component that is pre-registered by |rti_me|. To change the properties of the UDP transport, first the UDP component has be unregistered, then the properties have to be updated, and finally the component must be re-registered with the updated properties. Example code: - Unregister the pre-registered UDP component: :: /* Unregister the pre-registered UDP component */ if (!RT_Registry_unregister(registry, "_udp", NULL, NULL)) { /* failure */ } - Configure UDP transport properties: :: struct UDP_InterfaceFactoryProperty *udp_property = NULL; udp_property = (struct UDP_InterfaceFactoryProperty *) malloc(sizeof(struct UDP_InterfaceFactoryProperty)); if (udp_property != NULL) { *udp_property = UDP_INTERFACE_FACTORY_PROPERTY_DEFAULT; /* allow_interface: Names of network interfaces allowed to send/receive. * Allow one loopback (lo) and one NIC (eth0). */ REDA_StringSeq_set_maximum(&udp_property->allow_interface,2); REDA_StringSeq_set_length(&udp_property->allow_interface,2); *REDA_StringSeq_get_reference(&udp_property->allow_interface,0) = DDS_String_dup("lo"); *REDA_StringSeq_get_reference(&udp_property->allow_interface,1) = DDS_String_dup("eth0"); } else { /* failure */ } - Re-register UDP component with updated properties: :: if (!RT_Registry_register(registry, "_udp", UDP_InterfaceFactory_get_interface(), (struct RT_ComponentFactoryProperty*)udp_property, NULL)) { /* failure */ } For more details, see the :doc:`../usersmanual/transports/index` section in the User's Manual.