>Number: 160815
>Category: kern
>Synopsis: [patch] [iwn] Fix channel switching in monitor mode
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Sep 19 00:10:08 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator: Juergen Lock
>Release: FreeBSD 8.2-STABLE i386
>Organization:
me? organized??
>Environment:
System: FreeBSD enceladus.kn-bremen.de 9.0-BETA1 FreeBSD 9.0-BETA1 #1: Thu Sep
15 23:06:39 CEST 2011
[email protected]:/usr/obj/usr/src/sys/ENCELADUS amd64
>Description:
As mentioned earler on -current,
http://lists.freebsd.org/pipermail/freebsd-current/2011-September/027418.html
I have a "Centrino Advanced-N 6230" half-size mini-pcie
card and found channel switching didn't work in monitor
mode, the patch below seems to fix it.
>How-To-Repeat:
# ifconfig wlan0 create wlandev iwn0 wlanmode monitor ...
>Fix:
--- src/sys/dev/iwn/if_iwn.c.orig
+++ src/sys/dev/iwn/if_iwn.c
@@ -6984,12 +6984,24 @@ iwn_set_channel(struct ieee80211com *ic)
const struct ieee80211_channel *c = ic->ic_curchan;
struct ifnet *ifp = ic->ic_ifp;
struct iwn_softc *sc = ifp->if_softc;
+ int error;
IWN_LOCK(sc);
sc->sc_rxtap.wr_chan_freq = htole16(c->ic_freq);
sc->sc_rxtap.wr_chan_flags = htole16(c->ic_flags);
sc->sc_txtap.wt_chan_freq = htole16(c->ic_freq);
sc->sc_txtap.wt_chan_flags = htole16(c->ic_flags);
+
+ /*
+ * Only need to set the channel in Monitor mode. AP scanning and auth
+ * are already taken care of by their respective firmware commands.
+ */
+ if (ic->ic_opmode == IEEE80211_M_MONITOR) {
+ error = iwn_config(sc);
+ if (error != 0)
+ device_printf(sc->sc_dev,
+ "error %d settting channel\n", error);
+ }
IWN_UNLOCK(sc);
}
>Release-Note:
>Audit-Trail:
>Unformatted:
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