mirror of
https://github.com/reactos/reactos.git
synced 2024-08-21 02:43:48 +00:00
843 lines
25 KiB
C
843 lines
25 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel Streaming
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* FILE: drivers/ksfilter/ks/connectivity.c
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* PURPOSE: KS Pin functions
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* PROGRAMMER: Johannes Anderwald
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*/
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#include "precomp.h"
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#define NDEBUG
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#include <debug.h>
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KSPIN_INTERFACE StandardPinInterface =
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{
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{STATIC_KSINTERFACESETID_Standard},
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KSINTERFACE_STANDARD_STREAMING,
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0
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};
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KSPIN_MEDIUM StandardPinMedium =
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{
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{STATIC_KSMEDIUMSETID_Standard},
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KSMEDIUM_TYPE_ANYINSTANCE,
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0
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};
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const GUID KSDATAFORMAT_SUBTYPE_BDA_MPEG2_TRANSPORT = {0xf4aeb342, 0x0329, 0x4fdd, {0xa8, 0xfd, 0x4a, 0xff, 0x49, 0x26, 0xc9, 0x78}};
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/*
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@implemented
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*/
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KSDDKAPI
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NTSTATUS
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NTAPI
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KsCreatePin(
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IN HANDLE FilterHandle,
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IN PKSPIN_CONNECT Connect,
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IN ACCESS_MASK DesiredAccess,
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OUT PHANDLE ConnectionHandle)
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{
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UINT ConnectSize = sizeof(KSPIN_CONNECT);
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PKSDATAFORMAT_WAVEFORMATEX Format = (PKSDATAFORMAT_WAVEFORMATEX)(Connect + 1);
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if (Format->DataFormat.FormatSize == sizeof(KSDATAFORMAT) ||
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Format->DataFormat.FormatSize == sizeof(KSDATAFORMAT) + sizeof(WAVEFORMATEX))
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{
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ConnectSize += Format->DataFormat.FormatSize;
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}
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return KspCreateObjectType(FilterHandle,
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KSSTRING_Pin,
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(PVOID)Connect,
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ConnectSize,
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DesiredAccess,
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ConnectionHandle);
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}
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NTSTATUS
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KspValidateConnectRequest(
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IN PIRP Irp,
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IN ULONG DescriptorsCount,
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IN PVOID Descriptors,
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IN ULONG DescriptorSize,
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OUT PKSPIN_CONNECT* Connect)
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{
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PKSPIN_CONNECT ConnectDetails;
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PKSPIN_INTERFACE Interface;
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PKSPIN_MEDIUM Medium;
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ULONG Size;
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NTSTATUS Status;
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ULONG Index;
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ULONG Count;
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BOOLEAN Found;
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PKSPIN_DESCRIPTOR Descriptor;
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UNICODE_STRING GuidString2;
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/* did the caller miss the connect parameter */
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if (!Connect)
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return STATUS_INVALID_PARAMETER;
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/* set create param size */
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Size = sizeof(KSPIN_CONNECT);
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/* fetch create parameters */
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Status = KspCopyCreateRequest(Irp,
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KSSTRING_Pin,
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&Size,
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(PVOID*)&ConnectDetails);
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/* check for success */
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if (!NT_SUCCESS(Status))
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return Status;
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/* is pin id out of bounds */
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if (ConnectDetails->PinId >= DescriptorsCount)
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{
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FreeItem(ConnectDetails);
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return STATUS_INVALID_PARAMETER;
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}
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if (DescriptorSize == sizeof(KSPIN_DESCRIPTOR))
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{
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/* standard pin descriptor */
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Descriptor = (PKSPIN_DESCRIPTOR)((ULONG_PTR)Descriptors + sizeof(KSPIN_DESCRIPTOR) * ConnectDetails->PinId);
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}
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else
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{
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/* extended / variable pin descriptor */
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Descriptor = &((PKSPIN_DESCRIPTOR_EX)((ULONG_PTR)Descriptors + DescriptorSize * ConnectDetails->PinId))->PinDescriptor;
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}
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/* does the pin have interface details filled in */
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if (Descriptor->InterfacesCount && Descriptor->Interfaces)
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{
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/* use provided pin interface count */
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Count = Descriptor->InterfacesCount;
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Interface = (PKSPIN_INTERFACE)Descriptor->Interfaces;
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}
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else
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{
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/* use standard pin interface */
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Count = 1;
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Interface = &StandardPinInterface;
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}
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/* now check the interface */
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Found = FALSE;
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Index = 0;
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RtlStringFromGUID(&ConnectDetails->Interface.Set, &GuidString2);
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do
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{
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UNICODE_STRING GuidString;
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RtlStringFromGUID(&Interface[Index].Set, &GuidString);
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DPRINT("Driver Interface %S Id %u\n", GuidString.Buffer, Interface[Index].Id);
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DPRINT("Connect Interface %S Id %u\n", GuidString2.Buffer, ConnectDetails->Interface.Id);
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RtlFreeUnicodeString(&GuidString);
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if (IsEqualGUIDAligned(&Interface[Index].Set, &ConnectDetails->Interface.Set) &&
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Interface[Index].Id == ConnectDetails->Interface.Id)
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{
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/* found a matching interface */
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Found = TRUE;
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break;
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}
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/* iterate to next interface */
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Index++;
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}while(Index < Count);
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RtlFreeUnicodeString(&GuidString2);
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if (!Found)
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{
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/* pin doesnt support this interface */
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FreeItem(ConnectDetails);
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return STATUS_NO_MATCH;
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}
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/* does the pin have medium details filled in */
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if (Descriptor->MediumsCount && Descriptor->Mediums)
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{
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/* use provided pin interface count */
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Count = Descriptor->MediumsCount;
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Medium = (PKSPIN_MEDIUM)Descriptor->Mediums;
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}
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else
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{
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/* use standard pin interface */
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Count = 1;
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Medium = &StandardPinMedium;
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}
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/* now check the interface */
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Found = FALSE;
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Index = 0;
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RtlStringFromGUID(&ConnectDetails->Medium.Set, &GuidString2);
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do
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{
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UNICODE_STRING GuidString;
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RtlStringFromGUID(&Medium[Index].Set, &GuidString);
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DPRINT("Driver Medium %S Id %u\n", GuidString.Buffer, Medium[Index].Id);
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DPRINT("Connect Medium %S Id %u\n", GuidString2.Buffer, ConnectDetails->Medium.Id);
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RtlFreeUnicodeString(&GuidString);
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if (IsEqualGUIDAligned(&Medium[Index].Set, &ConnectDetails->Medium.Set) &&
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Medium[Index].Id == ConnectDetails->Medium.Id)
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{
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/* found a matching interface */
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Found = TRUE;
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break;
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}
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/* iterate to next medium */
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Index++;
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}while(Index < Count);
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RtlFreeUnicodeString(&GuidString2);
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if (!Found)
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{
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/* pin doesnt support this medium */
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FreeItem(ConnectDetails);
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return STATUS_NO_MATCH;
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}
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/// FIXME
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/// implement format checking
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*Connect = ConnectDetails;
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return STATUS_SUCCESS;
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}
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/*
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@implemented
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*/
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KSDDKAPI
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NTSTATUS
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NTAPI
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KsValidateConnectRequest(
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IN PIRP Irp,
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IN ULONG DescriptorsCount,
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IN KSPIN_DESCRIPTOR* Descriptor,
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OUT PKSPIN_CONNECT* Connect)
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{
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return KspValidateConnectRequest(Irp, DescriptorsCount, Descriptor, sizeof(KSPIN_DESCRIPTOR), Connect);
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}
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NTSTATUS
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KspReadMediaCategory(
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IN LPGUID Category,
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PKEY_VALUE_PARTIAL_INFORMATION *OutInformation)
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{
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UNICODE_STRING MediaPath = RTL_CONSTANT_STRING(L"\\REGISTRY\\MACHINE\\SYSTEM\\CurrentControlSet\\Control\\MediaCategories\\");
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UNICODE_STRING Name = RTL_CONSTANT_STRING(L"Name");
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UNICODE_STRING GuidString, Path;
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NTSTATUS Status;
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OBJECT_ATTRIBUTES ObjectAttributes;
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HANDLE hKey;
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ULONG Size;
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PKEY_VALUE_PARTIAL_INFORMATION KeyInfo;
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/* convert the guid to string */
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Status = RtlStringFromGUID(Category, &GuidString);
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if (!NT_SUCCESS(Status))
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return Status;
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/* allocate buffer for the registry key */
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Path.Length = 0;
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Path.MaximumLength = MediaPath.MaximumLength + GuidString.MaximumLength;
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Path.Buffer = AllocateItem(NonPagedPool, Path.MaximumLength);
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if (!Path.Buffer)
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{
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/* not enough memory */
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RtlFreeUnicodeString(&GuidString);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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RtlAppendUnicodeStringToString(&Path, &MediaPath);
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RtlAppendUnicodeStringToString(&Path, &GuidString);
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/* free guid string */
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RtlFreeUnicodeString(&GuidString);
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/* initialize object attributes */
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InitializeObjectAttributes(&ObjectAttributes, &Path, OBJ_CASE_INSENSITIVE, NULL, NULL);
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/* open the key */
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Status = ZwOpenKey(&hKey, GENERIC_READ, &ObjectAttributes);
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DPRINT("ZwOpenKey() status 0x%08lx %wZ\n", Status, &Path);
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/* free path buffer */
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FreeItem(Path.Buffer);
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/* check for success */
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("ZwOpenKey() failed with status 0x%08lx\n", Status);
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return Status;
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}
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/* query the name size */
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Status = ZwQueryValueKey(hKey, &Name, KeyValuePartialInformation, NULL, 0, &Size);
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if (!NT_SUCCESS(Status) && Status != STATUS_BUFFER_TOO_SMALL)
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{
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/* failed to query for name key */
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ZwClose(hKey);
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return Status;
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}
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/* allocate buffer to read key info */
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KeyInfo = (PKEY_VALUE_PARTIAL_INFORMATION) AllocateItem(NonPagedPool, Size);
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if (!KeyInfo)
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{
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/* not enough memory */
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ZwClose(hKey);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/* now read the info */
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Status = ZwQueryValueKey(hKey, &Name, KeyValuePartialInformation, (PVOID)KeyInfo, Size, &Size);
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/* close the key */
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ZwClose(hKey);
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if (!NT_SUCCESS(Status))
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{
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/* failed to read key */
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FreeItem(KeyInfo);
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return Status;
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}
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/* store key information */
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*OutInformation = KeyInfo;
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return Status;
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}
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KSDDKAPI
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NTSTATUS
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NTAPI
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KspPinPropertyHandler(
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IN PIRP Irp,
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IN PKSPROPERTY Property,
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IN OUT PVOID Data,
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IN ULONG DescriptorsCount,
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IN const KSPIN_DESCRIPTOR* Descriptors,
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IN ULONG DescriptorSize)
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{
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KSP_PIN * Pin;
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KSMULTIPLE_ITEM * Item;
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PIO_STACK_LOCATION IoStack;
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ULONG Size, Index;
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PVOID Buffer;
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PKSDATARANGE_AUDIO *WaveFormatOut;
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PKSDATAFORMAT_WAVEFORMATEX WaveFormatIn;
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PKEY_VALUE_PARTIAL_INFORMATION KeyInfo;
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const KSPIN_DESCRIPTOR *Descriptor;
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NTSTATUS Status = STATUS_NOT_SUPPORTED;
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ULONG Count;
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const PKSDATARANGE* DataRanges;
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LPGUID Guid;
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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Buffer = Data;
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//DPRINT("KsPinPropertyHandler Irp %p Property %p Data %p DescriptorsCount %u Descriptor %p OutputLength %u Id %u\n", Irp, Property, Data, DescriptorsCount, Descriptor, IoStack->Parameters.DeviceIoControl.OutputBufferLength, Property->Id);
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/* convert to PKSP_PIN */
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Pin = (KSP_PIN*)Property;
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if (Property->Id != KSPROPERTY_PIN_CTYPES)
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{
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if (Pin->PinId >= DescriptorsCount)
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{
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/* invalid parameter */
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return STATUS_INVALID_PARAMETER;
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}
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}
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else
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{
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(*(PULONG)Buffer) = DescriptorsCount;
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Irp->IoStatus.Information = sizeof(ULONG);
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return STATUS_SUCCESS;
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}
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if (DescriptorSize == sizeof(KSPIN_DESCRIPTOR))
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{
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/* it is simple pin descriptor */
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Descriptor = &Descriptors[Pin->PinId];
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}
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else
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{
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/* get offset to pin descriptor */
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Descriptor = &(((PKSPIN_DESCRIPTOR_EX)((ULONG_PTR)Descriptors + Pin->PinId * DescriptorSize))->PinDescriptor);
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}
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switch(Property->Id)
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{
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case KSPROPERTY_PIN_DATAFLOW:
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Size = sizeof(KSPIN_DATAFLOW);
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < Size)
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{
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Irp->IoStatus.Information = Size;
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Status = STATUS_BUFFER_TOO_SMALL;
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break;
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}
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*((KSPIN_DATAFLOW*)Buffer) = Descriptor->DataFlow;
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Irp->IoStatus.Information = sizeof(KSPIN_DATAFLOW);
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Status = STATUS_SUCCESS;
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break;
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case KSPROPERTY_PIN_DATARANGES:
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case KSPROPERTY_PIN_CONSTRAINEDDATARANGES:
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Size = sizeof(KSMULTIPLE_ITEM);
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DPRINT("Id %lu PinId %lu DataRangesCount %lu ConstrainedDataRangesCount %lu\n", Property->Id, Pin->PinId, Descriptor->DataRangesCount, Descriptor->ConstrainedDataRangesCount);
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if (Property->Id == KSPROPERTY_PIN_DATARANGES || Descriptor->ConstrainedDataRangesCount == 0)
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{
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DataRanges = Descriptor->DataRanges;
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Count = Descriptor->DataRangesCount;
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}
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else
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{
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DataRanges = Descriptor->ConstrainedDataRanges;
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Count = Descriptor->ConstrainedDataRangesCount;
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}
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for (Index = 0; Index < Count; Index++)
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{
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Size += ((DataRanges[Index]->FormatSize + 0x7) & ~0x7);
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}
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength == 0)
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{
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/* buffer too small */
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Irp->IoStatus.Information = Size;
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Status = STATUS_BUFFER_OVERFLOW;
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break;
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}
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Item = (KSMULTIPLE_ITEM*)Buffer;
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength == sizeof(ULONG))
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{
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/* store the result size */
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Item->Size = Size;
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Irp->IoStatus.Information = sizeof(ULONG);
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Status = STATUS_SUCCESS;
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break;
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}
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/* store descriptor size */
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Item->Size = Size;
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Item->Count = Count;
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength == sizeof(KSMULTIPLE_ITEM))
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{
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Irp->IoStatus.Information = sizeof(KSMULTIPLE_ITEM);
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Status = STATUS_SUCCESS;
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break;
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}
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/* now copy all dataranges */
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Data = (PUCHAR)(Item +1);
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/* alignment assert */
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ASSERT(((ULONG_PTR)Data & 0x7) == 0);
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for (Index = 0; Index < Count; Index++)
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{
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UNICODE_STRING GuidString;
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/* convert the guid to string */
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RtlStringFromGUID(&DataRanges[Index]->MajorFormat, &GuidString);
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DPRINT("Index %lu MajorFormat %S\n", Index, GuidString.Buffer);
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RtlStringFromGUID(&DataRanges[Index]->SubFormat, &GuidString);
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DPRINT("Index %lu SubFormat %S\n", Index, GuidString.Buffer);
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RtlStringFromGUID(&DataRanges[Index]->Specifier, &GuidString);
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DPRINT("Index %lu Specifier %S\n", Index, GuidString.Buffer);
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RtlStringFromGUID(&DataRanges[Index]->Specifier, &GuidString);
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DPRINT("Index %lu FormatSize %lu Flags %lu SampleSize %lu Reserved %lu KSDATAFORMAT %lu\n", Index,
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DataRanges[Index]->FormatSize, DataRanges[Index]->Flags, DataRanges[Index]->SampleSize, DataRanges[Index]->Reserved, sizeof(KSDATAFORMAT));
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RtlMoveMemory(Data, DataRanges[Index], DataRanges[Index]->FormatSize);
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Data = ((PUCHAR)Data + DataRanges[Index]->FormatSize);
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/* alignment assert */
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ASSERT(((ULONG_PTR)Data & 0x7) == 0);
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Data = (PVOID)(((ULONG_PTR)Data + 0x7) & ~0x7);
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}
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Status = STATUS_SUCCESS;
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Irp->IoStatus.Information = Size;
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break;
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case KSPROPERTY_PIN_INTERFACES:
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if (Descriptor->Interfaces)
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{
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/* use mediums provided by driver */
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return KsHandleSizedListQuery(Irp, Descriptor->InterfacesCount, sizeof(KSPIN_MEDIUM), Descriptor->Interfaces);
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}
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else
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{
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/* use standard medium */
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return KsHandleSizedListQuery(Irp, 1, sizeof(KSPIN_INTERFACE), &StandardPinInterface);
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}
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break;
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case KSPROPERTY_PIN_MEDIUMS:
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if (Descriptor->MediumsCount)
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{
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/* use mediums provided by driver */
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return KsHandleSizedListQuery(Irp, Descriptor->MediumsCount, sizeof(KSPIN_MEDIUM), Descriptor->Mediums);
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}
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else
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{
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/* use standard medium */
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return KsHandleSizedListQuery(Irp, 1, sizeof(KSPIN_MEDIUM), &StandardPinMedium);
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}
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break;
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case KSPROPERTY_PIN_COMMUNICATION:
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Size = sizeof(KSPIN_COMMUNICATION);
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < Size)
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{
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Irp->IoStatus.Information = Size;
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Status = STATUS_BUFFER_TOO_SMALL;
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break;
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}
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*((KSPIN_COMMUNICATION*)Buffer) = Descriptor->Communication;
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Status = STATUS_SUCCESS;
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Irp->IoStatus.Information = Size;
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break;
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case KSPROPERTY_PIN_CATEGORY:
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if (!Descriptor->Category)
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{
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/* no pin category */
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return STATUS_NOT_FOUND;
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}
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/* check size */
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Size = sizeof(GUID);
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < Size)
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{
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/* buffer too small */
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Irp->IoStatus.Information = Size;
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Status = STATUS_BUFFER_TOO_SMALL;
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break;
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}
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/* copy category guid */
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RtlMoveMemory(Buffer, Descriptor->Category, sizeof(GUID));
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/* save result */
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Status = STATUS_SUCCESS;
|
|
Irp->IoStatus.Information = Size;
|
|
break;
|
|
|
|
case KSPROPERTY_PIN_NAME:
|
|
|
|
if (Descriptor->Name)
|
|
{
|
|
/* use pin name */
|
|
Guid = (LPGUID)Descriptor->Name;
|
|
}
|
|
else
|
|
{
|
|
/* use pin category as fallback */
|
|
Guid = (LPGUID)Descriptor->Category;
|
|
}
|
|
|
|
if (!Guid)
|
|
{
|
|
/* no friendly name available */
|
|
return STATUS_NOT_FOUND;
|
|
}
|
|
|
|
/* read friendly name category name */
|
|
Status = KspReadMediaCategory(Guid, &KeyInfo);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* failed to read category */
|
|
Irp->IoStatus.Information = 0;
|
|
break;
|
|
}
|
|
|
|
/* store required length */
|
|
Irp->IoStatus.Information = KeyInfo->DataLength + sizeof(WCHAR);
|
|
|
|
/* check if buffer is too small */
|
|
if (KeyInfo->DataLength + sizeof(WCHAR) > IoStack->Parameters.DeviceIoControl.OutputBufferLength)
|
|
{
|
|
/* buffer too small */
|
|
Status = STATUS_BUFFER_OVERFLOW;
|
|
FreeItem(KeyInfo);
|
|
break;
|
|
}
|
|
|
|
/* copy result */
|
|
RtlMoveMemory(Irp->AssociatedIrp.SystemBuffer, &KeyInfo->Data, KeyInfo->DataLength);
|
|
|
|
/* null terminate name */
|
|
((LPWSTR)Irp->AssociatedIrp.SystemBuffer)[KeyInfo->DataLength / sizeof(WCHAR)] = L'\0';
|
|
|
|
/* free key info */
|
|
FreeItem(KeyInfo);
|
|
break;
|
|
case KSPROPERTY_PIN_PROPOSEDATAFORMAT:
|
|
Size = sizeof(KSDATAFORMAT);
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < Size)
|
|
{
|
|
Irp->IoStatus.Information = Size;
|
|
Status = STATUS_BUFFER_TOO_SMALL;
|
|
break;
|
|
}
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength != sizeof(KSDATAFORMAT_WAVEFORMATEX))
|
|
{
|
|
UNIMPLEMENTED;
|
|
Status = STATUS_NOT_IMPLEMENTED;
|
|
Irp->IoStatus.Information = 0;
|
|
break;
|
|
}
|
|
|
|
WaveFormatIn = (PKSDATAFORMAT_WAVEFORMATEX)Buffer;
|
|
if (!Descriptor->DataRanges || !Descriptor->DataRangesCount)
|
|
{
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
Irp->IoStatus.Information = 0;
|
|
break;
|
|
}
|
|
WaveFormatOut = (PKSDATARANGE_AUDIO*)Descriptor->DataRanges;
|
|
for(Index = 0; Index < Descriptor->DataRangesCount; Index++)
|
|
{
|
|
if (WaveFormatOut[Index]->DataRange.FormatSize != sizeof(KSDATARANGE_AUDIO))
|
|
{
|
|
UNIMPLEMENTED;
|
|
continue;
|
|
}
|
|
|
|
if (WaveFormatOut[Index]->MinimumSampleFrequency > WaveFormatIn->WaveFormatEx.nSamplesPerSec ||
|
|
WaveFormatOut[Index]->MaximumSampleFrequency < WaveFormatIn->WaveFormatEx.nSamplesPerSec ||
|
|
WaveFormatOut[Index]->MinimumBitsPerSample > WaveFormatIn->WaveFormatEx.wBitsPerSample ||
|
|
WaveFormatOut[Index]->MaximumBitsPerSample < WaveFormatIn->WaveFormatEx.wBitsPerSample ||
|
|
WaveFormatOut[Index]->MaximumChannels < WaveFormatIn->WaveFormatEx.nChannels)
|
|
{
|
|
Irp->IoStatus.Status = STATUS_NO_MATCH;
|
|
Irp->IoStatus.Information = 0;
|
|
return STATUS_NO_MATCH;
|
|
}
|
|
else
|
|
{
|
|
Irp->IoStatus.Status = STATUS_SUCCESS;
|
|
Irp->IoStatus.Information = 0;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
}
|
|
Status = STATUS_NO_MATCH;
|
|
Irp->IoStatus.Information = 0;
|
|
break;
|
|
default:
|
|
DPRINT1("Unhandled property request %x\n", Property->Id);
|
|
Status = STATUS_NOT_IMPLEMENTED;
|
|
Irp->IoStatus.Information = 0;
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
@implemented
|
|
*/
|
|
KSDDKAPI
|
|
NTSTATUS
|
|
NTAPI
|
|
KsPinPropertyHandler(
|
|
IN PIRP Irp,
|
|
IN PKSPROPERTY Property,
|
|
IN OUT PVOID Data,
|
|
IN ULONG DescriptorsCount,
|
|
IN const KSPIN_DESCRIPTOR* Descriptor)
|
|
{
|
|
return KspPinPropertyHandler(Irp, Property, Data, DescriptorsCount, Descriptor, sizeof(KSPIN_DESCRIPTOR));
|
|
}
|
|
|
|
/*
|
|
@unimplemented
|
|
*/
|
|
KSDDKAPI NTSTATUS NTAPI
|
|
KsPinDataIntersectionEx(
|
|
IN PIRP Irp,
|
|
IN PKSP_PIN Pin,
|
|
OUT PVOID Data,
|
|
IN ULONG DescriptorsCount,
|
|
IN const KSPIN_DESCRIPTOR* Descriptor,
|
|
IN ULONG DescriptorSize,
|
|
IN PFNKSINTERSECTHANDLEREX IntersectHandler OPTIONAL,
|
|
IN PVOID HandlerContext OPTIONAL)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
/*
|
|
@implemented
|
|
*/
|
|
KSDDKAPI
|
|
NTSTATUS
|
|
NTAPI
|
|
KsPinDataIntersection(
|
|
IN PIRP Irp,
|
|
IN PKSP_PIN Pin,
|
|
OUT PVOID Data,
|
|
IN ULONG DescriptorsCount,
|
|
IN const KSPIN_DESCRIPTOR* Descriptor,
|
|
IN PFNKSINTERSECTHANDLER IntersectHandler)
|
|
{
|
|
KSMULTIPLE_ITEM * Item;
|
|
KSDATARANGE * DataRange;
|
|
PIO_STACK_LOCATION IoStack;
|
|
ULONG Size;
|
|
ULONG Index;
|
|
NTSTATUS Status;
|
|
|
|
/* get current irp stack location */
|
|
IoStack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* calculate minimum data size */
|
|
Size = sizeof(KSP_PIN) + sizeof(KSMULTIPLE_ITEM) + sizeof(KSDATARANGE);
|
|
if (IoStack->Parameters.DeviceIoControl.InputBufferLength < Size)
|
|
{
|
|
/* buffer too small */
|
|
Irp->IoStatus.Information = Size;
|
|
Irp->IoStatus.Status = STATUS_BUFFER_TOO_SMALL;
|
|
return STATUS_BUFFER_TOO_SMALL;
|
|
}
|
|
/* is pin id out of bounds */
|
|
if (Pin->PinId >= DescriptorsCount)
|
|
{
|
|
/* it is */
|
|
Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
|
|
Irp->IoStatus.Information = 0;
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* get start item */
|
|
Item = (KSMULTIPLE_ITEM*)(Pin + 1);
|
|
/* get first data range */
|
|
DataRange = (KSDATARANGE*)(Item + 1);
|
|
/* iterate through all data ranges */
|
|
for(Index = 0; Index < Item->Count; Index++, DataRange++)
|
|
{
|
|
/* call intersect handler */
|
|
Status = IntersectHandler(Irp, Pin, DataRange, Data);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < DataRange->FormatSize)
|
|
{
|
|
/* buffer is too small */
|
|
Irp->IoStatus.Information = DataRange->FormatSize;
|
|
Irp->IoStatus.Status = STATUS_BUFFER_TOO_SMALL;
|
|
return STATUS_BUFFER_TOO_SMALL;
|
|
}
|
|
RtlMoveMemory(Irp->UserBuffer, DataRange, sizeof(KSDATARANGE));
|
|
Irp->IoStatus.Information = sizeof(KSDATARANGE);
|
|
Irp->IoStatus.Status = STATUS_SUCCESS;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
}
|
|
|
|
Irp->IoStatus.Information = 0;
|
|
Irp->IoStatus.Status = STATUS_NO_MATCH;
|
|
return STATUS_NO_MATCH;
|
|
}
|
|
|
|
/*
|
|
@implemented
|
|
*/
|
|
|
|
KSDDKAPI
|
|
NTSTATUS
|
|
NTAPI
|
|
KsHandleSizedListQuery(
|
|
IN PIRP Irp,
|
|
IN ULONG DataItemsCount,
|
|
IN ULONG DataItemSize,
|
|
IN const VOID* DataItems)
|
|
{
|
|
ULONG Size;
|
|
PIO_STACK_LOCATION IoStack;
|
|
PKSMULTIPLE_ITEM Item;
|
|
|
|
/* get current irp stack location */
|
|
IoStack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* calculate size */
|
|
Size = DataItemSize * DataItemsCount + sizeof(KSMULTIPLE_ITEM);
|
|
|
|
/* get multiple item */
|
|
Item = (PKSMULTIPLE_ITEM)Irp->AssociatedIrp.SystemBuffer;
|
|
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength == 0)
|
|
{
|
|
/* buffer too small */
|
|
Irp->IoStatus.Information = Size;
|
|
|
|
return STATUS_BUFFER_OVERFLOW;
|
|
}
|
|
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength == sizeof(ULONG))
|
|
{
|
|
/* store just the size */
|
|
Item->Size = Size;
|
|
Irp->IoStatus.Information = sizeof(ULONG);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(KSMULTIPLE_ITEM))
|
|
{
|
|
/* buffer too small */
|
|
return STATUS_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
Item->Count = DataItemsCount;
|
|
Item->Size = DataItemSize;
|
|
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength == sizeof(KSMULTIPLE_ITEM))
|
|
{
|
|
/* buffer can only hold the length descriptor */
|
|
Irp->IoStatus.Information = sizeof(KSMULTIPLE_ITEM);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
if (IoStack->Parameters.DeviceIoControl.OutputBufferLength >= Size)
|
|
{
|
|
/* copy items */
|
|
RtlMoveMemory((PVOID)(Item + 1), DataItems, DataItemSize * DataItemsCount);
|
|
/* store result */
|
|
Irp->IoStatus.Information = Size;
|
|
/* done */
|
|
return STATUS_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
/* buffer too small */
|
|
return STATUS_BUFFER_TOO_SMALL;
|
|
}
|
|
}
|
|
|