Add an example about showing wireless frames with tcpdump(8).

Apparently sniffing wifi frames isn't a very popular addiction?!?
Requested by David Hill.
ok aja phessler mpi

1 files changed, 5 insertions, 2 deletions

diff --git a/usr.sbin/tcpdump/tcpdump.8 b/usr.sbin/tcpdump/tcpdump.8
index fa1f194674d..cc9ce31027c 100644
--- a/usr.sbin/tcpdump/tcpdump.8
+++ b/usr.sbin/tcpdump/tcpdump.8
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: tcpdump.8,v 1.84 2015/02/28 21:51:57 bentley Exp $
+.\"	$OpenBSD: tcpdump.8,v 1.85 2015/07/18 16:55:31 stsp Exp $
 .\"
 .\" Copyright (c) 1987, 1988, 1989, 1990, 1991, 1992, 1994, 1995, 1996
 .\"	The Regents of the University of California.  All rights reserved.
@@ -19,7 +19,7 @@
 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 .\"
-.Dd $Mdocdate: February 28 2015 $
+.Dd $Mdocdate: July 18 2015 $
 .Dt TCPDUMP 8
 .Os
 .Sh NAME
@@ -1053,6 +1053,9 @@ To print only echo request ICMP packets:
 To print and decrypt all ESP packets with SPI 0x00001234:
 .Pp
 .Dl # tcpdump -E des3-hmac96:ab...def 'ip[20:4] = 0x00001234'
+.Pp
+To print raw wireless frames passing the iwn0 interface:
+.Dl # tcpdump -i iwn0 -y IEEE802_11_RADIO -v
 .Sh OUTPUT FORMAT
 The output of
 .Nm