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WSA_QOS_EFLOWCOUNT
NumFlowDesc must describe the exact FlowDescList supplied to RSVP
WSA_QOS_EFLOWCOUNT means the flow-descriptor count in the provider-specific reservation object is inconsistent with the list it references or with the selected style. Each FLOWDESCRIPTOR combines one FLOWSPEC with the filters that select traffic for that reservation branch.
Compare RSVP_RESERVE_INFO.NumFlowDesc with the allocated FlowDescList and inspect every descriptor before invoking Winsock. A zero count may be valid only in contexts where the provider supplies defaults; an oversized count can make the provider read beyond the array. In Shared Explicit or multiple Fixed Filter scenarios, preserve the intended grouping of filters by flowspec rather than flattening all senders into a single descriptor.
Flow-list consistency checks
- NumFlowDesc and allocated element count.
- FLOWSPEC associated with each descriptor.
- NumFilters and FilterList within each element.
- Reservation style and sender grouping.
References
- Microsoft: NumFlowDesc and FlowDescList
- Microsoft: structure of a flow descriptor
- Microsoft: how styles organize sender filters
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