irlapio.c

WinCE5.0部分核心源码

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// This source code is licensed under Microsoft Shared Source License
// Version 1.0 for Windows CE.
// For a copy of the license visit http://go.microsoft.com/fwlink/?LinkId=3223.
//
/*****************************************************************************
* 
*
*  File:   irlapio.c 
*
*  Description: IRLAP I/O routines 
*
*  Date:   4/25/95
*
*/
#include <irda.h>
#include <irlap.h>
#include <irlmp.h>
#include <irlapp.h>
#include <irlapio.h>
#include <irlaplog.h>

extern UCHAR IrlapBroadcastDevAddr[];

__inline
VOID
SendFrame(PIRLAP_CB pIrlapCb, PIRDA_MSG pMsg)
{
    pMsg->Prim = MAC_DATA_REQ;
  
	IrmacDown(pIrlapCb->pIrdaLinkCb, pMsg);

//    IRLAP_LOG_ACTION((pIrlapCb, TEXT("MAC_DATA_REQ: %s"), FrameToStr(pMsg)));

}

/*****************************************************************************
* 
*	@func	ret_type | func_name | funcdesc
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*	@parm	data_type | parm_name | description
*               
*	@comm 
*           comments
*/
VOID
ClearRxWindow(PIRLAP_CB pIrlapCb)
{
    UINT i;
    
    // Remove everything from Rx window
    for (i = pIrlapCb->Vr; i != pIrlapCb->RxWin.End; i = (i+1) % IRLAP_MOD)
    {   
        if (pIrlapCb->RxWin.pMsg[i] != NULL)
        {
            pIrlapCb->RxWin.pMsg[i]->Prim = MAC_DATA_RESP;
            IrmacDown(pIrlapCb->pIrdaLinkCb, pIrlapCb->RxWin.pMsg[i]);
            pIrlapCb->RxWin.pMsg[i] = NULL;     
        }
        pIrlapCb->RxWin.End = pIrlapCb->Vr;
    }
}
/*****************************************************************************
* 
*	@func	ret_type | func_name | funcdesc
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*	@parm	data_type | parm_name | description
*               
*	@comm 
*           comments
*/
VOID
SendDscvXIDCmd(PIRLAP_CB pIrlapCb)
{
	UINT                    rc = SUCCESS;
	IRLAP_XID_DSCV_FORMAT   XIDFormat;
	CHAR                    *DscvInfo;
    int                     DscvInfoLen;
    IRDA_MSG                *pIMsg;

	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);

	RtlCopyMemory(XIDFormat.SrcAddr, pIrlapCb->LocalDevice.DevAddr,
                  IRDA_DEV_ADDR_LEN);
	RtlCopyMemory(XIDFormat.DestAddr, IrlapBroadcastDevAddr,
                  IRDA_DEV_ADDR_LEN);

	XIDFormat.NoOfSlots = IRLAP_SLOT_FLAG(pIrlapCb->MaxSlot);
	XIDFormat.GenNewAddr = pIrlapCb->GenNewAddr;
    XIDFormat.Reserved = 0;
    
	if (pIrlapCb->SlotCnt == pIrlapCb->MaxSlot)
	{
		DscvInfo = pIrlapCb->LocalDevice.DscvInfo;
        DscvInfoLen = pIrlapCb->LocalDevice.DscvInfoLen;
		XIDFormat.SlotNo = IRLAP_END_DSCV_SLOT_NO;
	}
	else
	{
		DscvInfo = NULL;
        DscvInfoLen = 0;
		XIDFormat.SlotNo = pIrlapCb->SlotCnt;
	}
	XIDFormat.Version = pIrlapCb->LocalDevice.IRLAP_Version;		
	
	pIMsg->IRDA_MSG_pWrite = Format_DscvXID(pIMsg, 
                                              IRLAP_BROADCAST_CONN_ADDR,
                                              IRLAP_CMD, IRLAP_PFBIT_SET,
                                              &XIDFormat, DscvInfo, 
                                              DscvInfoLen);
    
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx DscvXidCmd")));
    
	SendFrame(pIrlapCb, pIMsg);
}
/****************************************************************************S*
* 
*	@func	ret_type | func_name | funcdesc
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*	@parm	data_type | parm_name | description
*               
*	@comm 
*           comments
*/
VOID
SendDscvXIDRsp(PIRLAP_CB pIrlapCb)
{
	IRLAP_XID_DSCV_FORMAT   XIDFormat;
    IRDA_MSG                *pIMsg;
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);

    XIDFormat.GenNewAddr = pIrlapCb->GenNewAddr;
	if (pIrlapCb->GenNewAddr)
	{
		StoreULAddr(pIrlapCb->LocalDevice.DevAddr, GetMyDevAddr(TRUE));
        pIrlapCb->GenNewAddr = FALSE;
	}
	RtlCopyMemory(XIDFormat.SrcAddr, pIrlapCb->LocalDevice.DevAddr,
                  IRDA_DEV_ADDR_LEN);
	RtlCopyMemory(XIDFormat.DestAddr, pIrlapCb->RemoteDevice.DevAddr,
                  IRDA_DEV_ADDR_LEN);
	XIDFormat.NoOfSlots = IRLAP_SLOT_FLAG(pIrlapCb->RemoteMaxSlot);
    XIDFormat.Reserved = 0;
	XIDFormat.SlotNo = pIrlapCb->RespSlot;
	XIDFormat.Version = pIrlapCb->LocalDevice.IRLAP_Version;

	pIMsg->IRDA_MSG_pWrite = Format_DscvXID(
        pIMsg, 
        IRLAP_BROADCAST_CONN_ADDR,
        IRLAP_RSP, IRLAP_PFBIT_SET,
        &XIDFormat, 
        pIrlapCb->LocalDevice.DscvInfo,
        pIrlapCb->LocalDevice.DscvInfoLen);
    
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx DscvXidRsp")));
        
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendSNRM | formats a SNRM frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*	@parm	UCHAR | ConnAddr | Connection address
*               
*	@comm 
*           The ConnAddr can be different than that in the control block.
*			For reset, its the same, but set to broadcast for initial 
*			connection.
*/
VOID
SendSNRM(PIRLAP_CB pIrlapCb, BOOLEAN SendQos)
{
    IRDA_QOS_PARMS *pQos    =   NULL;
    int            ConnAddr =   pIrlapCb->ConnAddr;
    IRDA_MSG                    *pIMsg;
    
    if (SendQos)
    {
        ConnAddr = IRLAP_BROADCAST_CONN_ADDR;
        pQos = &pIrlapCb->LocalQos;
    }
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);

	pIMsg->IRDA_MSG_pWrite = Format_SNRM(pIMsg, ConnAddr, 
                                         IRLAP_CMD, 
                                         IRLAP_PFBIT_SET, 
                                         pIrlapCb->LocalDevice.DevAddr,
                                         pIrlapCb->RemoteDevice.DevAddr,
                                         pIrlapCb->ConnAddr,
                                         pQos);
                                         	
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx SNRM")));
                                             
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendUA | formats a UA frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
*
*	@parm	BOOLEAN | SendQos | Send the Qos  
*               
*	@comm 
*           comments
*/
VOID
SendUA(PIRLAP_CB pIrlapCb, BOOLEAN SendQos)
{
	IRDA_QOS_PARMS NegQos;
    IRDA_QOS_PARMS *pNegQos = NULL;
    UCHAR *pSrcAddr = NULL;
    UCHAR *pDestAddr = NULL;
    IRDA_MSG *pIMsg;

	if (SendQos)
	{
		// Put all parms (type 0 and 1) in NegQos
		RtlCopyMemory(&NegQos, &pIrlapCb->LocalQos, sizeof(IRDA_QOS_PARMS));
		// Overwrite type 0 parameters that have already been negotiated
		NegQos.bfBaud = pIrlapCb->NegotiatedQos.bfBaud;
		NegQos.bfDisconnectTime = pIrlapCb->NegotiatedQos.bfDisconnectTime;
        pNegQos = &NegQos;
	}

    // This will be moved into the "if" above when the spec is clarified
    pSrcAddr = pIrlapCb->LocalDevice.DevAddr;
    pDestAddr = pIrlapCb->RemoteDevice.DevAddr;
    //------------------------------------------------------------------
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);

	pIMsg->IRDA_MSG_pWrite = Format_UA(pIMsg, 
                                       pIrlapCb->ConnAddr,
                                       IRLAP_RSP, 
                                       IRLAP_PFBIT_SET, 
                                       pSrcAddr, pDestAddr, pNegQos);

    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx UA")));
        
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendDM | formats a DM frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*               
*	@comm 
*           comments
*/
VOID
SendDM(PIRLAP_CB pIrlapCb)
{
    IRDA_MSG    *pIMsg;
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);

	pIMsg->IRDA_MSG_pWrite = Format_DM(pIMsg, 
                                       pIrlapCb->ConnAddr,
                                       IRLAP_RSP, 
                                       IRLAP_PFBIT_SET);
                                       
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx DM")));	
    
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendRD | formats a RD frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*               
*	@comm 
*           comments
*/
VOID
SendRD(PIRLAP_CB pIrlapCb)
{
    IRDA_MSG    *pIMsg;
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);

	pIMsg->IRDA_MSG_pWrite = Format_RD(pIMsg, 
                                       pIrlapCb->ConnAddr,
                                       IRLAP_RSP, 
                                       IRLAP_PFBIT_SET);
	
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx RD")));
        
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendRR | formats a RR frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*               
*	@comm 
*           comments
*/
VOID
SendRR(PIRLAP_CB pIrlapCb)
{
    IRDA_MSG *pIMsg;
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);
    ClearRxWindow(pIrlapCb);
    
    pIrlapCb->RxWin.Start = pIrlapCb->Vr; // RxWin.Start = what we've acked

	pIMsg->IRDA_MSG_pWrite = Format_RR(pIMsg, pIrlapCb->ConnAddr,
									   pIrlapCb->CRBit, IRLAP_PFBIT_SET,
									   pIrlapCb->Vr);
	
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx RR")));
        
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendRNR | formats a RNR frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*               
*	@comm 
*           comments
*/
VOID
SendRR_RNR(PIRLAP_CB pIrlapCb)
{
    IRDA_MSG *pIMsg;
    
    UCHAR    *(*pFormatRR_RNR)();
    
    if (pIrlapCb->LocalBusy)
    {
        pFormatRR_RNR = Format_RNR;
    }
    else
    {
        pFormatRR_RNR = Format_RR;
    }
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);
    ClearRxWindow(pIrlapCb);

    
    pIrlapCb->RxWin.Start = pIrlapCb->Vr; // RxWin.Start = what we've acked


    pIMsg->IRDA_MSG_pWrite = (*pFormatRR_RNR)(pIMsg, pIrlapCb->ConnAddr,
                                            pIrlapCb->CRBit, IRLAP_PFBIT_SET,
                                            pIrlapCb->Vr);	
    
    IRLAP_LOG_ACTION((pIrlapCb, (TEXT("Tx %s"), Format_RNR? TEXT("RNR"):TEXT("RR"))));
    
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendDISC | formats a DISC frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*               
*	@comm 
*           comments
*/
VOID
SendDISC(PIRLAP_CB pIrlapCb)
{
    IRDA_MSG *pIMsg;
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);
   
	pIMsg->IRDA_MSG_pWrite = Format_DISC(pIMsg, pIrlapCb->ConnAddr,
										 IRLAP_CMD, IRLAP_PFBIT_SET);
	
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx DISC")));
    
	SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendRNRM | formats a RNRM frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*               
*	@comm 
*           comments
*/
VOID
SendRNRM(PIRLAP_CB pIrlapCb)
{
    IRDA_MSG *pIMsg;
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);
   
	pIMsg->IRDA_MSG_pWrite = Format_RNRM(pIMsg, pIrlapCb->ConnAddr,
										 IRLAP_RSP, IRLAP_PFBIT_SET);
	    
    IRLAP_LOG_ACTION((pIrlapCb, TEXT("Tx RNRM")));
	
    SendFrame(pIrlapCb, pIMsg);
}
/*****************************************************************************
* 
*	@func	UINT | SendREJ | formats a REJ frame and sends it
*
*	@rdesc  SUCCESS, otherwise one of the following errors:
*   @flag   val | desc
* 
*               
*	@comm 
*           comments
*/
VOID
SendREJ(PIRLAP_CB pIrlapCb)
{
    IRDA_MSG *pIMsg;
    
	pIMsg = AllocTxMsg(pIrlapCb->pIrdaLinkCb);
    ClearRxWindow(pIrlapCb);
    
    pIrlapCb->RxWin.Start = pIrlapCb->Vr; // RxWin.Start = what we've acked

	pIMsg->IRDA_MSG_pWrite = Format_REJ(pIMsg, pIrlapCb->ConnAddr,
                                        pIrlapCb->CRBit, IRLAP_PFBIT_SET,
                                        pIrlapCb->Vr);