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[NTOSKRNL]

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- Implement IoOpenDeviceInterfaceRegistryKey
- Dedicated to Janderwald

svn path=/trunk/; revision=46665
This commit is contained in:
Cameron Gutman 2010-04-02 07:29:54 +00:00
parent 2f60720f98
commit 66c160f1d6
1 changed files with 163 additions and 1 deletions
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164
reactos/ntoskrnl/io/iomgr/deviface.c
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@ -50,7 +50,169 @@ IoOpenDeviceInterfaceRegistryKey(IN PUNICODE_STRING SymbolicLinkName,
IN ACCESS_MASK DesiredAccess,
OUT PHANDLE DeviceInterfaceKey)
{
return STATUS_NOT_IMPLEMENTED;
WCHAR StrBuff[MAX_PATH], PathBuff[MAX_PATH];
PWCHAR Guid;
UNICODE_STRING EnumU = RTL_CONSTANT_STRING(ENUM_ROOT L"\\");
UNICODE_STRING DevParamU = RTL_CONSTANT_STRING(L"\\Device Parameters");
UNICODE_STRING PrefixU = RTL_CONSTANT_STRING(L"\\??\\");
UNICODE_STRING KeyPath, KeyName;
UNICODE_STRING MatchableGuid;
HANDLE GuidKey, ChildKey;
ULONG Index = 0;
PKEY_BASIC_INFORMATION KeyInformation;
ULONG KeyInformationLength;
PKEY_VALUE_PARTIAL_INFORMATION KeyValueInformation;
ULONG KeyValueInformationLength;
OBJECT_ATTRIBUTES ObjectAttributes;
NTSTATUS Status;
ULONG RequiredLength;
MatchableGuid.Length = 0;
MatchableGuid.Length += swprintf(StrBuff,
L"##?#%ls",
&SymbolicLinkName->Buffer[PrefixU.Length / sizeof(WCHAR)]);
StrBuff[++MatchableGuid.Length] = UNICODE_NULL;
MatchableGuid.Buffer = StrBuff;
MatchableGuid.MaximumLength = MAX_PATH * sizeof(WCHAR);
MatchableGuid.Length = (MatchableGuid.Length-1) * sizeof(WCHAR);
Guid = wcsstr(StrBuff, L"{");
if (!Guid)
return STATUS_OBJECT_NAME_NOT_FOUND;
KeyPath.Buffer = PathBuff;
KeyPath.Length = 0;
KeyPath.MaximumLength = MAX_PATH * sizeof(WCHAR);
RtlAppendUnicodeToString(&KeyPath, BaseKeyString);
RtlAppendUnicodeToString(&KeyPath, Guid);
InitializeObjectAttributes(&ObjectAttributes,
&KeyPath,
OBJ_CASE_INSENSITIVE,
0,
NULL);
Status = ZwOpenKey(&GuidKey, KEY_CREATE_SUB_KEY, &ObjectAttributes);
if (!NT_SUCCESS(Status))
return Status;
while (TRUE)
{
Status = ZwEnumerateKey(GuidKey,
Index,
KeyBasicInformation,
NULL,
0,
&RequiredLength);
if (Status == STATUS_NO_MORE_ENTRIES)
break;
else if (Status == STATUS_BUFFER_TOO_SMALL)
{
KeyInformationLength = RequiredLength;
KeyInformation = ExAllocatePool(PagedPool, KeyInformationLength);
if (!KeyInformation)
{
ZwClose(GuidKey);
return STATUS_INSUFFICIENT_RESOURCES;
}
Status = ZwEnumerateKey(GuidKey,
Index,
KeyBasicInformation,
KeyInformation,
KeyInformationLength,
&RequiredLength);
}
else
{
ZwClose(GuidKey);
return STATUS_OBJECT_PATH_NOT_FOUND;
}
Index++;
if (!NT_SUCCESS(Status))
{
ZwClose(GuidKey);
return Status;
}
KeyName.Length = KeyName.MaximumLength = KeyInformation->NameLength;
KeyName.Buffer = KeyInformation->Name;
if (!RtlEqualUnicodeString(&KeyName, &MatchableGuid, TRUE))
continue;
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE,
GuidKey,
NULL);
Status = ZwOpenKey(&ChildKey, KEY_QUERY_VALUE, &ObjectAttributes);
ZwClose(GuidKey);
if (!NT_SUCCESS(Status))
return Status;
RtlInitUnicodeString(&KeyName, L"DeviceInstance");
Status = ZwQueryValueKey(ChildKey,
&KeyName,
KeyValuePartialInformation,
NULL,
0,
&RequiredLength);
if (Status == STATUS_BUFFER_TOO_SMALL)
{
KeyValueInformationLength = RequiredLength;
KeyValueInformation = ExAllocatePool(PagedPool, KeyValueInformationLength);
if (!KeyValueInformation)
{
ZwClose(ChildKey);
return Status;
}
Status = ZwQueryValueKey(ChildKey,
&KeyName,
KeyValuePartialInformation,
KeyValueInformation,
KeyValueInformationLength,
&RequiredLength);
}
else
{
ZwClose(ChildKey);
return STATUS_OBJECT_PATH_NOT_FOUND;
}
ZwClose(ChildKey);
if (!NT_SUCCESS(Status))
return Status;
KeyPath.Length = 0;
KeyName.Length = KeyName.MaximumLength = KeyValueInformation->DataLength;
KeyName.Buffer = (PWCHAR)KeyValueInformation->Data;
RtlAppendUnicodeStringToString(&KeyPath, &EnumU);
RtlAppendUnicodeStringToString(&KeyPath, &KeyName);
RtlAppendUnicodeStringToString(&KeyPath, &DevParamU);
InitializeObjectAttributes(&ObjectAttributes,
&KeyPath,
OBJ_CASE_INSENSITIVE,
0,
NULL);
Status = ZwCreateKey(DeviceInterfaceKey,
DesiredAccess,
&ObjectAttributes,
0,
NULL,
REG_OPTION_NON_VOLATILE,
NULL);
return Status;
}
return STATUS_OBJECT_PATH_NOT_FOUND;
}
/*++