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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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qos.h
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1998-04-25
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/*++
Copyright 1997 - 1998 Microsoft Corporation
Module Name:
qos.h - QoS definitions for NDIS components.
Abstract:
This module defines the Quality of Service structures and types used
by Winsock applications.
Revision History:
--*/
#ifndef __QOS_H_
#define __QOS_H_
/*
* Definitions for Service Type for each direction of data flow.
*/
typedef ULONG SERVICETYPE;
#define SERVICETYPE_NOTRAFFIC 0x00000000 /* No data in this
* direction */
#define SERVICETYPE_BESTEFFORT 0x00000001 /* Best Effort */
#define SERVICETYPE_CONTROLLEDLOAD 0x00000002 /* Controlled Load */
#define SERVICETYPE_GUARANTEED 0x00000003 /* Guaranteed */
#define SERVICETYPE_NETWORK_UNAVAILABLE 0x00000004 /* Used to notify
* change to user */
#define SERVICETYPE_GENERAL_INFORMATION 0x00000005 /* corresponds to
* "General Parameters"
* defined by IntServ */
#define SERVICETYPE_NOCHANGE 0x00000006 /* used to indicate
* that the flow spec
* contains no change
* from any previous
* one */
/*
* to turn on immediate traffic control, OR ( | ) this flag with the
* ServiceType field in the FLOWSPEC
*/
#define SERVICE_IMMEDIATE_TRAFFIC_CONTROL 0x80000000
/*
* this flag can be used with the immediate traffic control flag above to
* prevent any rsvp signaling messages from being sent. Local traffic
* control will be invoked, but no RSVP Path messages will be sent.This flag
* can also be used in conjunction with a receiving flowspec to suppress
* the automatic generation of a Reserve message. The application would
* receive notification that a Path message had arrived and would then need
* to alter the QOS by issuing WSAIoctl( SIO_SET_QOS ), to unset this flag
* and thereby cause Reserve messages to go out.
*/
#define SERVICE_NO_QOS_SIGNALING 0x40000000
/*
* Flow Specifications for each direction of data flow.
*/
typedef struct _flowspec
{
ULONG TokenRate; /* In Bytes/sec */
ULONG TokenBucketSize; /* In Bytes */
ULONG PeakBandwidth; /* In Bytes/sec */
ULONG Latency; /* In microseconds */
ULONG DelayVariation; /* In microseconds */
SERVICETYPE ServiceType;
ULONG MaxSduSize; /* In Bytes */
ULONG MinimumPolicedSize; /* In Bytes */
} FLOWSPEC, *PFLOWSPEC, * LPFLOWSPEC;
/*
* the provider specific structure can have a number of objects in it.
* Each next structure in the
* ProviderSpecific will be the QOS_OBJECT_HDR struct that prefaces the actual
* data with a type and length for that object. This QOS_OBJECT struct can
* repeat several times if there are several objects. This list of objects
* terminates either when the buffer length has been reached ( WSABUF ) or
* an object of type QOS_END_OF_LIST is encountered.
*/
/*
* define the type of objects that can go into the ProviderSpecific buffer
* in the QOS structure
*/
typedef struct {
ULONG ObjectType;
ULONG ObjectLength; /* the length of object buffer INCLUDING
* this header */
} QOS_OBJECT_HDR, *LPQOS_OBJECT_HDR;
/*
* Definition of object Types
*
*
* define the values for ObjectType above - RSVP Objects ids start at an
* offset from zero to allow for ATM objects that might be defined in the
* lower number range.
*/
#define RSVP_OBJECT_ID_BASE 1000
#define RSVP_OBJECT_STATUS_INFO (0x00000000 + RSVP_OBJECT_ID_BASE)
/* RSVP_STATUS_INFO structure passed */
#define RSVP_OBJECT_RESERVE_INFO (0x00000001 + RSVP_OBJECT_ID_BASE)
/* RSVP_RESERVE_INFO structure passed */
#define RSVP_OBJECT_ADSPEC (0x00000002 + RSVP_OBJECT_ID_BASE)
/* RSVP_ADSPEC structure passed */
/*
* general QOS objects start at this offset from the base and have a range
* of 1000
*/
#define QOS_GENERAL_ID_BASE 2000
#define QOS_OBJECT_PRIORITY (0x00000000 + QOS_GENERAL_ID_BASE)
/* QOS_PRIORITY structure passed */
#define QOS_OBJECT_END_OF_LIST (0x00000001 + QOS_GENERAL_ID_BASE)
/* QOS_End_of_list structure passed */
#define QOS_OBJECT_SD_MODE (0x00000002 + QOS_GENERAL_ID_BASE)
/* QOS_ShapeDiscard structure passed */
#define QOS_OBJECT_TRAFFIC_CLASS (0x00000003 + QOS_GENERAL_ID_BASE)
/* QOS_Traffic class structure passed */
/*
* this value can be used in the FLOWSPEC structure to instruct the Rsvp Service
* provider to derive the appropriate default value for the parameter. Note
* that not all values in the FLOWSPEC structure can be defaults. In the
* ReceivingFlowspec, all parameters can be defaulted except the ServiceType.
* In the SendingFlowspec, the MaxSduSize and MinimumPolicedSize can be
* defaulted. Other defaults may be possible. Refer to the appropriate
* documentation.
*/
#define QOS_NOT_SPECIFIED 0xFFFFFFFF
/*
* define a value that can be used for the PeakBandwidth, which will map into
* positive infinity when the FLOWSPEC is converted into IntServ floating point
* format. We can't use (-1) because that value was previously defined to mean
* "select the default".
*/
#define POSITIVE_INFINITY_RATE 0xFFFFFFFE
/*
* IPV6 addressing for RSVP FILTERSPECS
*/
typedef union _IN_ADDR_IPV4 {
ULONG Addr;
UCHAR AddrBytes[4];
} IN_ADDR_IPV4, *LPIN_ADDR_IPV4;
/*
* IPV6 addressing for RSVP FILTERSPECS
*/
typedef struct _IN_ADDR_IPV6 {
UCHAR Addr[16]; //IPV6 address
} IN_ADDR_IPV6, *LPIN_ADDR_IPV6;
typedef const IN_ADDR_IPV6 *LPCIN_ADDR_IPV6;
/*
* IPV4 addressing for RSVP FILTERSPECS
*/
typedef struct _RSVP_FILTERSPEC_V4 {
IN_ADDR_IPV4 Address;
USHORT Unused;
USHORT Port;
} RSVP_FILTERSPEC_V4, *LPRSVP_FILTERSPEC_V4;
typedef struct _RSVP_FILTERSPEC_V6 {
IN_ADDR_IPV6 Address;
USHORT UnUsed;
USHORT Port;
} RSVP_FILTERSPEC_V6, *LPRSVP_FILTERSPEC_V6;
typedef struct _RSVP_FILTERSPEC_V6_FLOW {
IN_ADDR_IPV6 Address;
UCHAR UnUsed;
UCHAR FlowLabel[3];
} RSVP_FILTERSPEC_V6_FLOW, *LPRSVP_FILTERSPEC_V6_FLOW;
typedef struct _RSVP_FILTERSPEC_V4_GPI {
IN_ADDR_IPV4 Address;
ULONG GeneralPortId;
} RSVP_FILTERSPEC_V4_GPI, *LPRSVP_FILTERSPEC_V4_GPI;
typedef struct _RSVP_FILTERSPEC_V6_GPI {
IN_ADDR_IPV6 Address;
ULONG GeneralPortId;
} RSVP_FILTERSPEC_V6_GPI, *LPRSVP_FILTERSPEC_V6_GPI;
/*
* FILTERSPEC TYPES used in making reservations.
*/
typedef enum {
FILTERSPECV4 = 1,
FILTERSPECV6,
FILTERSPECV6_FLOW,
FILTERSPECV4_GPI,
FILTERSPECV6_GPI,
FILTERSPEC_END
} FilterType;
typedef struct _RSVP_FILTERSPEC {
FilterType Type;
union {
RSVP_FILTERSPEC_V4 FilterSpecV4;
RSVP_FILTERSPEC_V6 FilterSpecV6;
RSVP_FILTERSPEC_V6_FLOW FilterSpecV6Flow;
RSVP_FILTERSPEC_V4_GPI FilterSpecV4Gpi;
RSVP_FILTERSPEC_V6_GPI FilterSpecV6Gpi;
};
} RSVP_FILTERSPEC, *LPRSVP_FILTERSPEC;
/*
* FLOWDESCRIPTOR Structure used for specifying one or more
* Filters per Flowspec.
*/
typedef struct _FLOWDESCRIPTOR {
FLOWSPEC FlowSpec;
ULONG NumFilters;
LPRSVP_FILTERSPEC FilterList;
} FLOWDESCRIPTOR, *LPFLOWDESCRIPTOR;
/*
* RSVP_POLICY contains undefined policy data. RSVP transports this
* data on behalf of the Policy Control component.
*/
typedef struct _RSVP_POLICY {
HANDLE Type; /* Pointer to structure: TBD */
} RSVP_POLICY, *LPRSVP_POLICY;
typedef const RSVP_POLICY *LPCRSVP_POLICY;
/*
* RSVP_RESERVE_INFO Structure used for storing RSVP specific
* information for fine tuning interaction via the Winsock2
* Generic QoS API via the provider specific buffer. This structure
* includes the QOS_OBJECT_HDR structure directly
*/
typedef struct _RSVP_RESERVE_INFO {
QOS_OBJECT_HDR ObjectHdr; /* type and length of this object */
ULONG Style; /* RSVP Style (FF,WF,SE) */
ULONG ConfirmRequest; /* Non Zero for Confirm Request */
LPRSVP_POLICY Policy; /* Optional policy data */
ULONG NumFlowDesc; /* Number of FlowDesc */
LPFLOWDESCRIPTOR FlowDescList; /* FlowDesc list */
} RSVP_RESERVE_INFO, *LPRSVP_RESERVE_INFO;
typedef const RSVP_RESERVE_INFO *LPCRSVP_RESERVE_INFO;
/*
* definitions for the ulStyle in the previous structure
*/
#define RSVP_WILDCARD_STYLE 0x00000001
#define RSVP_FIXED_FILTER_STYLE 0x00000002
#define RSVP_SHARED_EXPLICIT_STYLE 0x00000003
/*
* RSVP_STATUS_INFO Structure used for storing RSVP specific
* error of status indications. This also serves as a header
* for additional objects in the provider specific buffer when
* interacting via Winsock2 Generic QoS API. This structure includes
* the QOS_OBJECT_COUNT and QOS_OBJECT_HDR structures directly It is
* expected to be the first structure in the provider specific structure
* since it includes the QOS_OBJECT_COUNT
*/
typedef struct _RSVP_STATUS_INFO {
QOS_OBJECT_HDR ObjectHdr; /* Object Hdr */
ULONG StatusCode; /* Error or Status Information see
* Winsock2.h */
ULONG ExtendedStatus1;/* Provider specific status extension */
ULONG ExtendedStatus2;/* Provider specific status extension */
} RSVP_STATUS_INFO, *LPRSVP_STATUS_INFO;
typedef const RSVP_STATUS_INFO *LPCRSVP_STATUS_INFO;
/*
* This structure defines the absolute priorty of the flow. Priorities in the
* range of 0-7 are currently defined. Receive Priority is not currently used,
* but may at some point in the future.
*/
typedef struct _QOS_PRIORITY {
QOS_OBJECT_HDR ObjectHdr;
UCHAR SendPriority; /* this gets mapped to layer 2 priority.*/
UCHAR SendFlags; /* there are none currently defined.*/
UCHAR ReceivePriority; /* this could be used to decide who
* gets forwarded up the stack first
* - not used now */
UCHAR Unused;
} QOS_PRIORITY, *LPQOS_PRIORITY;
/*
* This structure is used to define the behaviour that the traffic
* control packet shaper will apply to the flow.
*
* PS_NONCONF_BORROW - the flow will receive resources remaining
* after all higher priority flows have been serviced. If a
* TokenRate is specified, packets may be non-conforming and
* will be demoted to less than best-effort priority.
*
* PS_NONCONF_SHAPE - TokenRate must be specified. Non-conforming
* packets will be retianed in the packet shaper until they become
* conforming.
*
* PS_NONCONF_DISCARD - TokenRate must be specified. Non-conforming
* packets will be discarded.
*
*/
typedef struct _QOS_SD_MODE {
QOS_OBJECT_HDR ObjectHdr;
ULONG ShapeDiscardMode;
} QOS_SD_MODE, *LPQOS_SD_MODE;
#define TC_NONCONF_BORROW 0
#define TC_NONCONF_SHAPE 1
#define TC_NONCONF_DISCARD 2
/*
* This structure may carry an 802.1 TrafficClass parameter which
* has been provided to the host by a layer 2 network, for example,
* in an 802.1 extended RSVP RESV message. If this object is obtained
* from the network, hosts will stamp the MAC headers of corresponding
* transmitted packets, with the value in the object. Otherwise, hosts
* may select a value based on the standard Intserv mapping of
* ServiceType to 802.1 TrafficClass.
*
*/
typedef struct _QOS_TRAFFIC_CLASS {
QOS_OBJECT_HDR ObjectHdr;
ULONG TrafficClass;
} QOS_TRAFFIC_CLASS, *LPQOS_TRAFFIC_CLASS;
/*
* this structure defines the "General Characterization Parameters" contained in
* the RSVP Adspec object
*/
typedef struct _AD_GENERAL_PARAMS{
ULONG IntServAwareHopCount; /* number of hops that conform to
* Integrated Services requirements */
ULONG PathBandwidthEstimate; /* minimum bandwidth available from
* sender to receiver */
ULONG MinimumLatency; /* sum of minimum latency of the packet
* forwarding process in routers
* (in usec)*/
ULONG PathMTU; /* max transmission unit end to end that
* will not incur fragmentation */
ULONG Flags; /* used to hold break bits.*/
} AD_GENERAL_PARAMS, *LPAD_GENERAL_PARAMS;
/*
* Minimum Latency may be set to this "undefined" value
*/
#define INDETERMINATE_LATENCY 0xFFFFFFFF;
/*
* This Flag is used to indicate the existence of a network element not
* supporting QoS control services somewhere in the data path. If this bit
* is set in the specific service override then it indicates that that
* service was not supported at at least one hop.
*/
#define AD_FLAG_BREAK_BIT 0x00000001
/*
* this structure describes the Guaranteed service parameters
*/
typedef struct _AD_GUARANTEED {
ULONG CTotal;
ULONG DTotal;
ULONG CSum;
ULONG DSum;
} AD_GUARANTEED, *LPAD_GUARANTEED;
/*
* this structure describes the format of the parameter buffer that can be
* included in the Service_Type structure below. This structure allows an
* application to include any valid Int Serv service parameter in the Buffer
* value, after providing the Int Serv parameter id in the ParameterId field.
*/
typedef struct _PARAM_BUFFER {
ULONG ParameterId; /* Int Server parameter ID */
ULONG Length; /* total length of this structure
* ( 8 bytes + length of Buffer ) */
UCHAR Buffer[1]; /* Paramter itself */
} PARAM_BUFFER, *LPPARAM_BUFFER;
/*
* this structure contains the service types supported
*/
typedef struct _CONTROL_SERVICE {
/*
* the length of this entire structure including the following buffer.
* This length value can be added to the ptr to the structure to get the ptr
* to the next SERVICE_TYPE structure in the list, until the
* NumberOfServices count has been exhausted.
*/
ULONG Length;
SERVICETYPE Service;
AD_GENERAL_PARAMS Overrides;
/*
* service specific information ( controlled load has no service specific
* info here )
*/
union {
AD_GUARANTEED Guaranteed;
PARAM_BUFFER ParamBuffer[1]; /* allows for other services down
* the road */
};
} CONTROL_SERVICE, *LPCONTROL_SERVICE;
/*
* This structure defines the information which is carried in the Rsvp
* Adspec. This Rsvp object typically indicates which service types are
* available ( Controlled Load and/or Guaranteed Service ), if a non-Rsvp
* hop has been encountered by the Path message, and the minumum MTU along
* the path. The services array indicates which services are supported
*/
typedef struct _RSVP_ADSPEC {
QOS_OBJECT_HDR ObjectHdr;
AD_GENERAL_PARAMS GeneralParams; /* contains the general
* characterization paramters */
ULONG NumberOfServices; /* count of the number of services */
CONTROL_SERVICE Services[1]; /* a list of the services
* supported/requested */
} RSVP_ADSPEC, *LPRSVP_ADSPEC;
#endif /* __QOS_H_ */