diff options
| author | Stuart Henderson <sthen@cvs.openbsd.org> | 2015-04-08 21:44:17 +0000 |
|---|---|---|
| committer | Stuart Henderson <sthen@cvs.openbsd.org> | 2015-04-08 21:44:17 +0000 |
| commit | 59e80e2eddd2aee933fab8de3f45708ef6273e9c (patch) | |
| tree | b454e858843e90109c5f61d7aa20a3d2871bb05c /usr.sbin/tcpdump | |
| parent | aa19282ca46f957f314eb7149767e0c9a7b26c92 (diff) | |
Teach the 802.11 printer about Channel Switch Announcements (advertised by
an AP in beacons in the run-up to a channel switch, either for radar avoidance,
or for frequency management). ok stsp@
We don't support these in net80211 yet (as pointed out by stsp a few days ago)
but it's useful to at least have a way to debug why your connection is getting
knocked down!
Diffstat (limited to 'usr.sbin/tcpdump')
| -rw-r--r-- | usr.sbin/tcpdump/print-802_11.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/usr.sbin/tcpdump/print-802_11.c b/usr.sbin/tcpdump/print-802_11.c index 5f81f45ebca..73b949eef3f 100644 --- a/usr.sbin/tcpdump/print-802_11.c +++ b/usr.sbin/tcpdump/print-802_11.c @@ -1,4 +1,4 @@ -/* $OpenBSD: print-802_11.c,v 1.16 2015/01/16 06:40:21 deraadt Exp $ */ +/* $OpenBSD: print-802_11.c,v 1.17 2015/04/08 21:44:16 sthen Exp $ */ /* * Copyright (c) 2005 Reyk Floeter <reyk@openbsd.org> @@ -323,6 +323,10 @@ ieee80211_elements(struct ieee80211_frame *wh, u_int flen) if (vflag) ieee80211_print_element(data, len); break; + case IEEE80211_ELEMID_CSA: + printf(", csa (chan %u count %u%s)", data[1], data[2], + (data[0] == 1) ? " noTX" : ""); + break; case IEEE80211_ELEMID_ERP: printf(", erp"); if (vflag) |