--- libaitio/inc/aitio.h	2016/08/11 12:25:51	1.41.2.3
+++ libaitio/inc/aitio.h	2016/08/11 13:31:51	1.41.2.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: aitio.h,v 1.41.2.3 2016/08/11 12:25:51 misho Exp $
+* $Id: aitio.h,v 1.41.2.4 2016/08/11 13:31:51 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -642,7 +642,7 @@ int io_dumbFile(const char *csFile, int mode, off_t si
  * @csIface = interface name
  * @flags = open flags
  * @whdr = with complete headers
- * @wdlt = with data link type
+ * @wdlt = with data link type, on Linux is protocol number
  * @buflen = buffer length
  * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
  * return: -1 error or >-1 bpf handle