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===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/sys/mbuf.h,v
retrieving revision 1.30
retrieving revision 1.31
diff -u -p -r1.30 -r1.31
--- src/sys/sys/mbuf.h	1997/10/05 18:43:24	1.30
+++ src/sys/sys/mbuf.h	1998/02/06 20:53:47	1.31
@@ -1,4 +1,4 @@
-/*	$NetBSD: mbuf.h,v 1.30 1997/10/05 18:43:24 thorpej Exp $	*/
+/*	$NetBSD: mbuf.h,v 1.31 1998/02/06 20:53:47 matt Exp $	*/
 
 /*-
  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
@@ -467,6 +467,13 @@ union mcluster {
 #define  m_copy(m, o, l)	m_copym((m), (o), (l), M_DONTWAIT)
 
 /*
+ * Allow drivers and/or protocols to use the rcvif member of
+ * PKTHDR mbufs to store private context information.
+ */
+#define	M_GETCTX(m, t)		((t) (m)->m_pkthdr.rcvif + 0)
+#define	M_SETCTX(m, c)		((void) ((m)->m_pkthdr.rcvif = (void *) (c)))
+
+/*
  * Mbuf statistics.
  */
 struct mbstat {