Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-07-06 20:55:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

Daniel Zimmerman <netzimme@aim.com>:

Browse source 
- Implement IoCheckEaBufferValidity()

svn path=/trunk/; revision=28506
This commit is contained in:
Aleksey Bragin 2007-08-24 07:55:14 +00:00
parent e6b469c9c0
commit 262a6322c1
2 changed files with 77 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
reactos/ntoskrnl/io/iomgr/file.c
View file

@ -1637,6 +1637,8 @@ IoCreateFile(OUT PHANDLE FileHandle,
PVOID SystemEaBuffer = NULL;
NTSTATUS Status = STATUS_SUCCESS;
OPEN_PACKET OpenPacket;
ULONG EaErrorOffset;
PAGED_CODE();
IOTRACE(IO_FILE_DEBUG, "FileName: %wZ\n", ObjectAttributes->ObjectName);
@ -1732,10 +1734,11 @@ IoCreateFile(OUT PHANDLE FileHandle,
/* Validate the buffer */
Status = IoCheckEaBufferValidity(SystemEaBuffer,
EaLength,
NULL);
&EaErrorOffset);
if (!NT_SUCCESS(Status))
{
/* FIXME: Fail once function is implemented */
DPRINT1("FIXME: IoCheckEaBufferValidity() failed with "
"Status: %lx\n",Status);
}
}
}

75
reactos/ntoskrnl/io/iomgr/util.c
View file

@ -130,7 +130,7 @@ IoCheckDesiredAccess(IN OUT PACCESS_MASK DesiredAccess,
}
/*
* @unimplemented
* @implemented
*/
NTSTATUS
NTAPI
@ -138,8 +138,77 @@ IoCheckEaBufferValidity(IN PFILE_FULL_EA_INFORMATION EaBuffer,
IN ULONG EaLength,
OUT PULONG ErrorOffset)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
PFILE_FULL_EA_INFORMATION EaBufferEnd;
ULONG NextEaBufferOffset, IntEaLength;
/* Lenght of the rest. Inital equal to EaLength */
IntEaLength = EaLength;
/* Inital EaBuffer equal to EaBuffer */
EaBufferEnd = EaBuffer;
/* The rest length of the buffer */
while (IntEaLength >= FIELD_OFFSET(FILE_FULL_EA_INFORMATION, EaName[0]))
{
/* rest of buffer must greater then the
sizeof(FILE_FULL_EA_INFORMATION) + buffer */
NextEaBufferOffset =
EaBufferEnd->EaNameLength + EaBufferEnd->EaValueLength +
FIELD_OFFSET(FILE_FULL_EA_INFORMATION, EaName[0]) + 1;
if (IntEaLength >= NextEaBufferOffset)
{
/* is the EaBufferName terminated with zero? */
if (EaBufferEnd->EaName[EaBufferEnd->EaNameLength]==0)
{
/* more EaBuffers ahead */
if (EaBufferEnd->NextEntryOffset == 0)
{
/* test the rest buffersize */
IntEaLength = IntEaLength - NextEaBufferOffset;
if (IntEaLength >= 0)
{
return STATUS_SUCCESS;
}
}
else
{
/* From the MSDN
http://msdn2.microsoft.com/en-us/library/ms795740.aspx
For all entries except the last, the value of
NextEntryOffset must be greater than zero and
must fall on a ULONG boundary
*/
NextEaBufferOffset = ((NextEaBufferOffset + 3) & ~3);
if ((EaBufferEnd->NextEntryOffset == NextEaBufferOffset) &&
(EaBufferEnd->NextEntryOffset>0))
{
/* Rest of buffer must be greater then the
next offset */
IntEaLength =
IntEaLength - EaBufferEnd->NextEntryOffset;
if (IntEaLength >= 0)
{
EaBufferEnd = (PFILE_FULL_EA_INFORMATION)
((ULONG_PTR)EaBufferEnd +
EaBufferEnd->NextEntryOffset);
continue;
}
}
}
}
}
break;
}
if (ErrorOffset != NULL)
{
/* Calculate the error offset */
*ErrorOffset = (ULONG)((ULONG_PTR)EaBufferEnd - (ULONG_PTR)EaBuffer);
}
return STATUS_EA_LIST_INCONSISTENT;
}
/*