You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
173 lines
3.9 KiB
173 lines
3.9 KiB
/*++
|
|
|
|
Copyright (c) 1989 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
rxtdi.c
|
|
|
|
Abstract:
|
|
|
|
This module implements the NT TDI related routines used by RXCE. The wrappers are necessary to
|
|
ensure that all the OS dependencies can be localized to select modules like this for
|
|
customization.
|
|
|
|
Revision History:
|
|
|
|
Balan Sethu Raman [SethuR] 15-Feb-1995
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
#pragma hdrstop
|
|
|
|
ULONG
|
|
ComputeTransportAddressLength(
|
|
PTRANSPORT_ADDRESS pTransportAddress)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
computes the length in bytes of a TRANSPORT_ADDRESS structure
|
|
|
|
Arguments:
|
|
|
|
pTransportAddress - TRANSPORT_ADDRESS instance
|
|
|
|
Return Value:
|
|
|
|
the length of the instance in bytes
|
|
|
|
Notes:
|
|
|
|
Since this structure is packed the arithmetic has to be done using unaligned pointers.
|
|
|
|
--*/
|
|
{
|
|
ULONG Size = 0;
|
|
|
|
if (pTransportAddress != NULL) {
|
|
LONG Index;
|
|
|
|
TA_ADDRESS *pTaAddress;
|
|
|
|
Size = FIELD_OFFSET(TRANSPORT_ADDRESS,Address) +
|
|
FIELD_OFFSET(TA_ADDRESS,Address) * pTransportAddress->TAAddressCount;
|
|
|
|
pTaAddress = (TA_ADDRESS *)pTransportAddress->Address;
|
|
|
|
for (Index = 0;Index <pTransportAddress->TAAddressCount;Index++) {
|
|
Size += pTaAddress->AddressLength;
|
|
pTaAddress = (TA_ADDRESS *)((PCHAR)pTaAddress +
|
|
FIELD_OFFSET(TA_ADDRESS,Address) +
|
|
pTaAddress->AddressLength);
|
|
}
|
|
}
|
|
|
|
return Size;
|
|
}
|
|
|
|
PIRP
|
|
RxCeAllocateIrpWithMDL(
|
|
IN CCHAR StackSize,
|
|
IN BOOLEAN ChargeQuota,
|
|
IN PMDL Buffer)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
computes the length in bytes of a TRANSPORT_ADDRESS structure
|
|
|
|
Arguments:
|
|
|
|
pTransportAddress - TRANSPORT_ADDRESS instance
|
|
|
|
Return Value:
|
|
|
|
the length of the instance in bytes
|
|
|
|
Notes:
|
|
|
|
Currently the RxCeAllocateIrp and RxCeFreeIrp are implemented as wrappers around the
|
|
IO calls. One possible optimization to consider would be to maintain a pool of IRP's
|
|
which can be reused.
|
|
|
|
--*/
|
|
{
|
|
PIRP pIrp = NULL;
|
|
PRX_IRP_LIST_ITEM pListItem = NULL;
|
|
|
|
pIrp = IoAllocateIrp(StackSize,ChargeQuota);
|
|
|
|
if (pIrp != NULL) {
|
|
pListItem = RxAllocatePoolWithTag(
|
|
NonPagedPool,
|
|
sizeof(RX_IRP_LIST_ITEM),
|
|
RX_IRPC_POOLTAG);
|
|
|
|
if (pListItem == NULL) {
|
|
IoFreeIrp(pIrp);
|
|
pIrp = NULL;
|
|
} else {
|
|
KIRQL SavedIrql;
|
|
|
|
pListItem->pIrp = pIrp;
|
|
pListItem->CopyDataBuffer = Buffer;
|
|
pListItem->Completed = 0;
|
|
InitializeListHead(&pListItem->IrpsList);
|
|
|
|
KeAcquireSpinLock(&RxIrpsListSpinLock,&SavedIrql);
|
|
InsertTailList(&RxIrpsList,&pListItem->IrpsList);
|
|
KeReleaseSpinLock(&RxIrpsListSpinLock,SavedIrql);
|
|
}
|
|
}
|
|
|
|
return pIrp;
|
|
}
|
|
|
|
VOID
|
|
RxCeFreeIrp(PIRP pIrp)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
frees an IRP
|
|
|
|
Arguments:
|
|
|
|
pIrp - IRP to be freed
|
|
|
|
--*/
|
|
{
|
|
KIRQL SavedIrql;
|
|
PLIST_ENTRY pListEntry;
|
|
BOOLEAN IrpFound = FALSE;
|
|
PRX_IRP_LIST_ITEM pListItem = NULL;
|
|
|
|
KeAcquireSpinLock(&RxIrpsListSpinLock,&SavedIrql);
|
|
|
|
pListEntry = RxIrpsList.Flink;
|
|
|
|
while (pListEntry != &RxIrpsList) {
|
|
pListItem = CONTAINING_RECORD(
|
|
pListEntry,
|
|
RX_IRP_LIST_ITEM,
|
|
IrpsList);
|
|
|
|
if (pListItem->pIrp == pIrp) {
|
|
IrpFound = TRUE;
|
|
//ASSERT(pListItem->Completed);
|
|
RemoveEntryList(pListEntry);
|
|
RxFreePool(pListItem);
|
|
break;
|
|
} else {
|
|
pListEntry = pListEntry->Flink;
|
|
}
|
|
}
|
|
|
|
KeReleaseSpinLock(&RxIrpsListSpinLock,SavedIrql);
|
|
|
|
ASSERT(IrpFound);
|
|
|
|
IoFreeIrp(pIrp);
|
|
}
|