auto import from //depot/cupcake/@135843
diff --git a/atm.h b/atm.h
new file mode 100644
index 0000000..c6ac53e
--- /dev/null
+++ b/atm.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2002 Guy Harris.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code
+ * distributions retain the above copyright notice and this paragraph
+ * in its entirety, and (2) distributions including binary code include
+ * the above copyright notice and this paragraph in its entirety in
+ * the documentation or other materials provided with the distribution.
+ * The name of Guy Harris may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#) $Header: /tcpdump/master/tcpdump/atm.h,v 1.1.4.1 2005/06/20 07:45:05 hannes Exp $
+ */
+
+/*
+ * Traffic types for ATM.
+ */
+#define ATM_UNKNOWN 0 /* Unknown */
+#define ATM_LANE 1 /* LANE */
+#define ATM_LLC 2 /* LLC encapsulation */
+
+/*
+ * some OAM cell captures (most notably Juniper's)
+ * do not deliver a heading HEC byte
+ */
+#define ATM_OAM_NOHEC 0
+#define ATM_OAM_HEC 1