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//
// The LLC struct in the Link Data :
//
typdef union _LLC_HDR {
struct _LLC_I {
// C compilers should allocate the bits from lo to high
UINT fDSAP:7; // Destination SAP
UINT fGI:1; // Group / Indivual SAP
UINT fSSAP:7; // Source SAP
UINT fCr:1; // Command/Response
UINT fNs:7; // Transmitter send sequence number
UINT fType:1; // Set always to 0
UINT fNr:7; // Transmitter receive sequence number
UINT fPF:1; // Poll/Final Bit
} I; // Information frame
struct LLC_S {
UINT fDSAP:7; // Destination SAP
UINT fGI:1; // Group / Indivual SAP
UINT fSSAP:7; // Source SAP
UINT fCr:1; // Command/Response
UINT fCmd:8; // 0x80, 0x90, 0xA0, 0xB0
UINT fNr:7; // Transmitter receive sequence number
UINT fPF:1; // Poll/Final Bit
} S; // Supervisory frame
struct _LLC_U {
UINT fDSAP:7; // Destination SAP
UINT fGI:1; // Group / Indivual SAP
UINT fSSAP:7; // Source SAP
UINT fCr:1; // Command/Response
UINT fCmd1:3; // U- commands
UINT fPF:1; // Poll/Final Bit
UINT fCmd2:2; // U- commands
UINT fRes:2; // the topmouts bits are always 11
} U; // U command frame
struct _LLC_U_RAW {
UINT fDSAP:7; // Destination SAP
UINT fGI:1; // Group / Indivual SAP
UINT fSSAP:7; // Source SAP
UINT fCr:1; // Command/Response
UINT fCmd:8; // U- command (OR THIS!!!)
UINT fPadding:8; // this is already data
} rawU; // U command frame
//
struct _LLC_TYPE {
UINT fDSAP:7; // Destination SAP
UINT fGI:1; // Group / Indivual SAP
UINT fSSAP:7; // Source SAP
UINT fCr:1; // Command/Response
UINT fCmd:6; // the command or Ns bits
UINT fIsUFrame:1; // 1 => U, 0 => S frame (if not I frame)
UINT fIsNotI:1; // 0 => I frame
UINT fNr:7; // Transmitter receive seq number for I/S
UINT fPF:1; // Poll/Final Bit for I/S frames
} type;
ULONG ulRawLLc;
} LLC_HDR;
// ... somewhere in the link struct
LLCHDR xmtLcc; // the next transmitted frame, set to 0 when done
LLCHDR rvcLcc; // the last received frame
//
// The first index select the conditon, usActionId is returned if the
// condition is true, otherwise the next element is executed
typedef struct _COND_ACTS {
USHORT usConditionId;
USHORT usActionId;
} COND_ACTS, FAR *PCOND_ACTS;
//
// Structure includes all
typedef struct _FSM {
{
PCOND_ACTS pActionSelectIds; // condition-action pairs
PUSHORT pusActionPrimtives; // action primitive procedures
(USHORT *ActionSelect)(VOID *, PUSHORT, USHORT); // selects the action
(UINT *ExecPrimitives)(VOID *, PUSHORT, USHORT); // execs selected action
struct {
BOOL boolStateProcExists;
(UINT * StateProcedure)( VOID *pContext, USHORT );
PUSHORT pusInputs; // returns action selection id
#if sizeof(INT) == 4
INT iReserved; // makes element 16 bytes even if 32 bit word
#endif
} aStates[1]; // for all states
} FSM, FAR *PFSM;
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