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diff --git a/private/ntos/tdi/isn/rip/utils.h b/private/ntos/tdi/isn/rip/utils.h
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+++ b/private/ntos/tdi/isn/rip/utils.h
@@ -0,0 +1,77 @@
+/*******************************************************************/
+/*	      Copyright(c)  1993 Microsoft Corporation		   */
+/*******************************************************************/
+
+//***
+//
+// Filename:	utils.h
+//
+// Description: Contains miscellaneous utilities
+//
+// Author:	Stefan Solomon (stefans)    October 4, 1993.
+//
+// Revision History:
+//
+//***
+
+#ifndef _UTILS_
+#define _UTILS_
+
+//*** General Spin Lock Utilities ***
+
+#define INITIALIZE_SPIN_LOCK(lockp)  \
+	NdisAllocateSpinLock(lockp)
+
+#define DEINITIALIZE_SPIN_LOCK(lock)  \
+        NdisFreeSpinLock(lock)
+
+#define ACQUIRE_SPIN_LOCK(lockp)  \
+	NdisAcquireSpinLock(lockp)
+
+#define RELEASE_SPIN_LOCK(lockp)  \
+	NdisReleaseSpinLock(lockp)
+
+//*** Routing Table Spin Locks ***
+
+#define ACQUIRE_RTSEGMENT_SPIN_LOCK(segment, oldirqlp)	\
+	ExAcquireSpinLock(SegmentLocksTable + segment, oldirqlp)
+
+#define RELEASE_RTSEGEMENT_SPIN_LOCK(segment, oldirqlp) \
+	ExReleaseSpinLock(SegmentLocksTable + segment, oldirqlp)
+
+/*
+ * The following macros deal with on-the-wire short and long values
+ *
+ * On the wire format is big-endian i.e. a long value of 0x01020304 is
+ * represented as 01 02 03 04.
+ * Similarly a short value of 0x0102 is represented as 01 02.
+ *
+ * The host format is not assumed since it will vary from processor to
+ * processor.
+ */
+
+// Get a short from on-the-wire format to a USHORT in the host format
+#define GETSHORT2USHORT(DstPtr, SrcPtr)	\
+		*(PUSHORT)(DstPtr) = ((*((PUCHAR)(SrcPtr)+0) << 8) +	\
+					  (*((PUCHAR)(SrcPtr)+1)		))
+
+// Get a long from on-the-wire format to a ULONG in the host format
+#define GETLONG2ULONG(DstPtr, SrcPtr)	\
+		*(PULONG)(DstPtr) = ((*((PUCHAR)(SrcPtr)+0) << 24) + \
+					  (*((PUCHAR)(SrcPtr)+1) << 16) + \
+					  (*((PUCHAR)(SrcPtr)+2) << 8)	+ \
+					  (*((PUCHAR)(SrcPtr)+3)	))
+
+// Put a USHORT from the host format to a short to on-the-wire format
+#define PUTUSHORT2SHORT(DstPtr, Src)   \
+		*((PUCHAR)(DstPtr)+0) = (UCHAR) ((USHORT)(Src) >> 8), \
+		*((PUCHAR)(DstPtr)+1) = (UCHAR)(Src)
+
+// Put a ULONG from the host format to an array of 4 UCHARs on-the-wire format
+#define PUTULONG2LONG(DstPtr, Src)   \
+		*((PUCHAR)(DstPtr)+0) = (UCHAR) ((ULONG)(Src) >> 24), \
+		*((PUCHAR)(DstPtr)+1) = (UCHAR) ((ULONG)(Src) >> 16), \
+		*((PUCHAR)(DstPtr)+2) = (UCHAR) ((ULONG)(Src) >>	8), \
+		*((PUCHAR)(DstPtr)+3) = (UCHAR) (Src)
+
+#endif	// _UTILS_