| Previous | Next |
| WSANO_DATA | WSA_QOS_SENDERS |
WSA_QOS_RECEIVERS
A receiver has created reservation state for traffic from this sender
WSA_QOS_RECEIVERS is a QoS status notification rather than a socket failure. It reports that at least one downstream receiver has sent an RSVP RESV request that reached the sender-side path state. In RSVP, receivers request resources and the reservation travels upstream toward the data source, so this event can appear after PATH state was already established.
Use the event to update flow state, not to assume that every receiver has identical service. Multicast sessions may merge reservations, and different branches can request different flowspecs. Inspect the RSVP_STATUS_INFO object in the event-associated QOS.ProviderSpecific buffer and correlate it with the sender, session, interface, and reservation style. Modern Windows systems do not provide the old RSVP signaling stack, so current sightings often come from legacy software or compatibility components.
Evidence that identifies the arriving reservation
- Socket and RSVP session tuple.
- StatusCode plus both extended status fields.
- Reservation style and receiving FLOWSPEC.
- Time of the earlier PATH notification.
References
- Microsoft: RSVP_STATUS_INFO event details
- Microsoft: RSVP PATH and RESV message roles
- IETF RFC 2205: receiver-initiated reservations
Looking for a different code? Search another status or error code.