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LLC_READ_PARMS Overview  Group

The LLC_READ_PARMS structure is the DLC parameter table for the LLC_READ command. You pass a pointer to this structure using the pParameterTable member of the CCB_PARMS union.

typedef struct {

    USHORT usStationId;

    UCHAR uchOptionIndicator;

    UCHAR uchEventSet;

    UCHAR uchEvent;

    UCHAR uchCriticalSubset;

    ULONG ulNotificationFlag;

    union {

        struct {

            USHORT usCcbCount;

            PLLC_CCB pCcbCompletionList;

            USHORT usBufferCount;

            PLLC_BUFFER pFirstBuffer;

            USHORT usReceivedFrameCount;

            PLLC_BUFFER pReceivedFrame;

            USHORT usEventErrorCode;

            USHORT usEventErrorData[3];

        } Event;

        struct {

            USHORT usStationId;

            USHORT usDlcStatusCode;

            UCHAR uchFrmrData[5];

            UCHAR uchAccessPritority;

            UCHAR uchRemoteNodeAddress[6];

            UCHAR uchRemoteSap;

            UCHAR uchReserved;

            USHORT usUserStatusValue;

        } Status;

    } Type;



} LLC_READ_PARMS, *PLLC_READ_PARMS;

Members

usStationId
SAP station identifier.
uchOptionIndicator
Read option indicator. Specify one of the following values.

Value

Description

LLC_OPTION_READ_STATION

Match the read command using the station identifier.

LLC_OPTION_READ_SAP

Match the read command using the SAP number of the station identifier.

LLC_OPTION_READ_ALL

Match the read command using all events.

uchEventSet
Set of events for notification. Specify one of the following values.

Value

Description

LLC_READ_ALL_EVENTS

All events.

LLC_EVENT_SYSTEM_ACTION

System action events.

LLC_EVENT_NETWORK_STATUS

Network status events (non-critical).

LLC_EVENT_CRITICAL_EXCEPTION

Critical exception.

LLC_EVENT_STATUS_CHANGE

DLC status change.

LLC_EVENT_RECEIVE_DATA

Receive data.

LLC_EVENT_TRANSMIT_COMPLETION

Transmit completion.

LLC_EVENT_COMMAND_COMPLETION

Command completion.

uchEvent
Posting event. Receives one of the LLC_EVENT constants described in uchEventSet.
uchCriticalSubset
Critical event subset identifier. This member receives one of the following values.

Value

Description

1

Network status

2

Adapter check

3

System error

4

System action

ulNotificationFlag
Event user notification flag. This member receives the DLC status flag, as defined with the LLC_DLC_OPEN_SAP command, for the link station that experienced the change.
usCcbCount
Count of command control blocks chained to pCcbCompletionList.
pCcbCompletionList
Specifies the address of the command control blocks.
usBufferCount
Count of buffers chained to pFirstBuffer.
pFirstBuffer
Address of the first buffer of received data.
usReceivedFrameCount
Count of received frames chained to pReceivedFrame.
pReceivedFrame
Address of the received frame.
usEventErrorCode
Exception code.
usEventErrorData
Exception parameters.
usStationId
SAP or link station identifier.
usDlcStatusCode
DLC status code. This member receives one or more of the following values.

Code

Name

0x8000

LLC_INDICATE_LINK_LOST

0x4000

LLC_INDICATE_DM_DISC_RECEIVED

0x2000

LLC_INDICATE_FRMR_RECEIVED

0x1000

LLC_INDICATE_FRMR_SENT

0x0800

LLC_INDICATE_RESET

0x0400

LLC_INDICATE_CONNECT_REQUEST

0x0200

LLC_INDICATE_REMOTE_BUSY

0x0100

LLC_INDICATE_REMOTE_READY

0x0080

LLC_INDICATE_TI_TIMER_EXPIRED

0x0040

LLC_INDICATE_DLC_COUTNER_OVERFLOW

0x0020

LLC_INDICATE_ACCESS_PRTY_LOWERED

0x0001

LLC_INDICATE_LOCAL_STATION_BUSY

uchFrmrData
Frame data.
uchAccessPriority
The new Token-Ring access priority. This value is not recognized on other networks.
uchRemoteNodeAddress
Remote node address.
uchRemoteSap
Remote SAP address.
uchReserved
Reserved.
usUserStatusValue
User status value.

Remarks

The following table shows which members are used for each event.

Event

Members used

LLC_EVENT_SYSTEM_ACTION

ulNotificationFlag
usCcbCount
pCcbCompletionList
usBufferCount
pFirstBuffer
usReceivedFrameCount
pReceivedFrame
usEventErrorCode
usEventErrorData

LLC_EVENT_NETWORK_STATUS

ulNotificationFlag
usEventErrorCode

LLC_EVENT_CRITICAL_EXCEPTION

uchCriticalSubset
ulNotificationFlag
usCcbCount
pCcbCompletionList
usBufferCount
pFirstBuffer
usReceivedFrameCount
pReceivedFrame
usEventErrorCode
usEventErrorData

LLC_EVENT_STATUS_CHANGE

ulNotificationFlag
usStationId
usDlcStatusCode
uchFrmrData
uchAccessPriority
uchRemoteNodeAddress
uchRemoteSap
usUserStatusValue

LLC_EVENT_RECEIVE_DATA

usReceivedFrameCount
pReceivedFrame

LLC_EVENT_TRANSMIT_COMPLETION

usCcbCount
pCcbCompletionList

LLC_EVENT_COMMAND_COMPLETION

usCcbCount
pCcbCompletionList
usBufferCount
pFirstBuffer
usReceivedFrameCount
pReceivedFrame

See Also

AcsLan, CCB_PARMS


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