[cgutman] 43664: - Don't allocate a buffer if we don't have any neighbors

Author: cgutman
Date: Wed Oct 21 05:49:44 2009
New Revision: 43664

URL: http://svn.reactos.org/svn/reactos?rev=43664&view=rev
Log:
 - Don't allocate a buffer if we don't have any neighbors

Modified:
    trunk/reactos/drivers/network/tcpip/tcpip/iinfo.c

Modified: trunk/reactos/drivers/network/tcpip/tcpip/iinfo.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/tcpip/tcpi…
==============================================================================
--- trunk/reactos/drivers/network/tcpip/tcpip/iinfo.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/tcpip/tcpip/iinfo.c [iso-8859-1] Wed Oct 21 05:49:44
2009
@@ -113,16 +113,23 @@
     NTSTATUS Status;
     ULONG NumNeighbors = NBCopyNeighbors( Interface, NULL );
     ULONG MemSize = NumNeighbors * sizeof(IPARP_ENTRY);
-    PIPARP_ENTRY ArpEntries =
-	exAllocatePoolWithTag
-	( NonPagedPool, MemSize, FOURCC('A','R','P','t') );
-
-    if( !ArpEntries ) return STATUS_NO_MEMORY;
-    NBCopyNeighbors( Interface, ArpEntries );
-
-    Status = InfoCopyOut( (PVOID)ArpEntries, MemSize, Buffer, BufferSize );
-
-    exFreePool( ArpEntries );
+    PIPARP_ENTRY ArpEntries;
+
+    if (MemSize != 0)
+    {
+        ArpEntries = exAllocatePoolWithTag( NonPagedPool, MemSize,
FOURCC('A','R','P','t') );
+        if( !ArpEntries ) return STATUS_NO_MEMORY;
+
+        NBCopyNeighbors( Interface, ArpEntries );
+
+        Status = InfoCopyOut( (PVOID)ArpEntries, MemSize, Buffer, BufferSize );
+
+        exFreePool( ArpEntries );
+    }
+    else
+    {
+        Status = InfoCopyOut(NULL, 0, NULL, BufferSize);
+    }
 
     return Status;
 }