| Platform SDK: Quality of Service |
Traffic control uses GUIDs to convey information about the status of packet shaper interfaces, to report errors, and to provide statistics.
The GUID_QOS_STATISTICS_BUFFER structure is actually an array of PS_COMPONENT_STATS structures, which in turn serve as a container structure, holding one of the five following structures in its Stats member:
The following table lists GUIDs used with packet shaper on Windows 2000 QOS-enabled computers. In the scope column, P/I indicates that the GUID is based per-interface, and P/F indicates it is based per-flow.
| GUID | Size | Scope | Settable? | Notification? | Description |
|---|---|---|---|---|---|
| GUID_QOS_REMAINING_ BANDWIDTH |
ULONG | P/I | No | Yes | The remaining amount of reservable bandwidth on this interface. |
| GUID_QOS_LATENCY | ULONG | P/I | No | No | The latency of this interface. |
| GUID_QOS_FLOW_COUNT | ULONG | P/I | No | Yes | Number of active flows. |
| GUID_QOS_NON_ BESTEFFORT_LIMIT |
ULONG | P/I | No | No | The total amount of reservable bandwidth. |
| GUID_QOS_MAX_ OUTSTANDING_SENDS |
ULONG | P/I | No | No | Maximum number of sends that can be outstanding on this interface. |
| GUID_QOS_STATISTICS_ BUFFER |
See the following. | P/I, P/F | Yes | No | Statistics collected for flow or interface. The GUID_QOS_STATISTICS_BUFFER structure is actually an array of PS_COMPONENT_STATS structures, as described in the preceding. |
| GUID_QOS_FLOW_MODE | ULONG | P/I | Yes | No | Mode of operation for this interface: STANDARD or DIFFSERV. Note that you must specify the constants rather than Standard or Diffserv when using this GUID. |
| GUID_QOS_ISSLOW_FLOW | ULONG | P/F | No | No | Indicates an ISSLOW flow. |
| GUID_QOS_TIMER_ RESOLUTION |
ULONG | none | No | No | Timer resolution, in microseconds. |
| GUID_QOS_FLOW_IP_ CONFORMING |
ULONG | P/F | No | No | The conforming DSCP value for this flow. |
| GUID_QOS_FLOW_IP_ NONCONFORMING |
ULONG | P/F | No | No | The nonconforming SCP value for this flow. |
| GUID_QOS_FLOW_8021P_ CONFORMING |
ULONG | P/F | No | No | The conforming 802.1p value for this flow |
| GUID_QOS_FLOW_8021P_ NONCONFORMING |
ULONG | P/F | No | No | The nonconforming 802.1p value for this flow. |
In the GUID_QOS_STATISTICS_BUFFER GUID described in the table above, you must pass in a buffer that is large enough to hold all returned PS_COMPONENT_STATS structures.
Version: Requires MAPI 1.0 or later.
Header: Declared in Mapiguid.h.