Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

- u -

• unacknowledged_sample_count : DDS_ReliableWriterCacheChangedStatus
• unacknowledged_sample_count_peak : DDS_ReliableWriterCacheChangedStatus
• uncommitted_sample_count : DDS_DataReaderProtocolStatus
• unicast : DDS_DataWriterQos , DDS_DataReaderQos
• unicast_enabled : NDDS_Transport_UDPv4_Property_t , NDDS_Transport_UDPv6_Property_t
• unicast_locators : DDS_PublicationBuiltinTopicData , DDS_SubscriptionBuiltinTopicData
• url_profile : DDS_ProfileQosPolicy
• use_42e_compatible_alignment : DDS_DynamicDataTypeSerializationProperty_t
• use_shared_exclusive_area : DDS_ExclusiveAreaQosPolicy
• user_data : DDS_ParticipantBuiltinTopicData , DDS_DataReaderQos , DDS_DataWriterQos , RTI_Connext_ReplierListener , DDS_DomainParticipantQos , DDS_PublicationBuiltinTopicData , RTI_Connext_SimpleReplierListener , DDS_SubscriptionBuiltinTopicData
• user_multicast_port_offset : DDS_RtpsWellKnownPorts_t
• user_unicast_port_offset : DDS_RtpsWellKnownPorts_t