[ros-dev] IoCheckEaBufferValidity

[netzimme at aim.com]

 Hallo
 
 Have a patch that implemented the function IoCheckEaBufferValidity in ntoskrnl\io\iomgr\util.c. 
 Tested with Windows 2000 and Vista Ultimate 64 Bit.
 Perhaps some one can comit it for me.
 
 Thanks 
 dz
 
 
 
  
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===================================================================
--- file.c	(revision 28441)
+++ file.c	(working copy)
@@ -1632,6 +1632,7 @@
              IN ULONG Options)
 {
     KPROCESSOR_MODE AccessMode;
+    ULONG EaErrorOffset;
     HANDLE LocalHandle = 0;
     LARGE_INTEGER SafeAllocationSize;
     PVOID SystemEaBuffer = NULL;
@@ -1732,10 +1733,10 @@
             /* 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);
             }
         }
     }
Index: util.c
===================================================================
--- util.c	(revision 28441)
+++ util.c	(working copy)
@@ -129,8 +129,9 @@
     return STATUS_SUCCESS;
 }
 
+
 /*
- * @unimplemented
+ * @implemented
  */
 NTSTATUS
 NTAPI
@@ -138,10 +139,58 @@
                         IN ULONG EaLength,
                         OUT PULONG ErrorOffset)
 {
-    UNIMPLEMENTED;
-    return STATUS_NOT_IMPLEMENTED;
+   PFILE_FULL_EA_INFORMATION EaBufferEnd;
+   ULONG LenOfEaBuffer;
+   UINT IntEaLength;
+
+   IntEaLength = EaLength;
+   EaBufferEnd = EaBuffer;
+
+   while (IntEaLength >= 8)
+   {
+      LenOfEaBuffer = EaBufferEnd->EaNameLength+EaBufferEnd->EaValueLength + 9;
+      if (IntEaLength >= LenOfEaBuffer)
+      {
+         if (EaBufferEnd->EaName[EaBufferEnd->EaNameLength]==0)
+         {
+            if (EaBufferEnd->NextEntryOffset == 0)
+            {
+               IntEaLength = IntEaLength - LenOfEaBuffer;
+               if (IntEaLength>=0)
+               {
+                  return STATUS_SUCCESS;
+               }
+            }
+            else
+            { 
+               LenOfEaBuffer = ((LenOfEaBuffer + 3) & 0xFFFFFFFC);
+               if (EaBufferEnd->NextEntryOffset == LenOfEaBuffer)
+               {
+                  if (EaBufferEnd->NextEntryOffset>0)
+                  {
+                     IntEaLength = IntEaLength - EaBufferEnd->NextEntryOffset;
+                     if (IntEaLength>=0)
+                     {
+                        LenOfEaBuffer = EaBufferEnd->NextEntryOffset;
+                        EaBufferEnd = (PFILE_FULL_EA_INFORMATION)((PBYTE)EaBufferEnd + LenOfEaBuffer);
+                        continue;
+                     }
+                  }
+               }
+            }
+         }
+      }
+      break;
+   }
+   if (ErrorOffset != NULL)
+   {
+      *ErrorOffset = (ULONG)((PBYTE)EaBufferEnd - (PBYTE)EaBuffer);
+   }
+   
+   return STATUS_EA_LIST_INCONSISTENT;
 }
 
+
 /*
  * @unimplemented
  */