Windows error 11019 (WSA_QOS_EFILTERSTYLE): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: the reservation uses an invalid RSVP filter style.

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WSA_QOS_EPROVSPECBUF	WSA_QOS_EFILTERTYPE

WSA_QOS_EFILTERSTYLE

Filter style determines sender selection and reservation sharing

WSA_QOS_EFILTERSTYLE is returned when the provider cannot interpret the requested filter-style value. RSVP reservation style combines sender selection with resource sharing: Fixed Filter reserves separately for explicit senders, Shared Explicit shares one reservation among a listed set, and Wildcard Filter shares resources without enumerating individual senders.

Read the style from RSVP_RESERVE_INFO and verify it against the socket topology and flow-descriptor list. Do not confuse reservation style with the FilterType inside each FILTERSPEC; they are separate fields with separate validation. Legacy Windows documentation also limits some explicit style control to the Windows 2000 RSVP implementation, which matters when diagnosing old binaries on later systems.

Inputs that establish a legal style

Style constant and raw numeric value.
Unicast or multicast session type.
Explicit sender list, if required.
Existing reservation style for the same session.

References

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