kern/174722: [wlan] can't use channel 12 and 13 (14) with my wifi interface

Sat Dec 29 12:15:42 UTC 2012

Hi Adrian,

Just to make sure:
| ifconfig wlan0 regdomain DE

can't work. So I used:

| ifconfig wlan0 down
| ifconfig wlan0 ecm
| ifconfig wlan0 regdomain ETSI
| ifconfig wlan0 up
| ifconfig wlan0 list channel

But this also shows me not the channels 12/13.

BTW ath vs. iwi:
As you read in my first mail, I have the same issue if I use ndis for my device. If you can build a ndis driver for your interface (NDISulator), you should have the same issue.

Regards,
Carsten

-------- Original-Nachricht --------
> Datum: Fri, 28 Dec 2012 08:41:34 -0800
> Von: Adrian Chadd <adrian at freebsd.org>
> An: Carsten Wiedmann <carsten_sttgt at gmx.de>
> CC: freebsd-wireless at freebsd.org
> Betreff: Re: kern/174722: [wlan] can\'t use channel 12 and 13 (14) with my wifi interface

> Hi,
> 
> The problem is likely because the 'ecm' flag isn't set when it creates
> the channel list.
> 
> That's why I suggested setting the ecm flag, setting the regdomain or
> country, then checking the channel list.
> 
> The iwi code just uses the default net80211 regulatory domain code to
> populate the channel list. The ath(4) code sets things up based on its
> own internal channel assembly code.
> That's why I've not noticed this behaviour before.
> 
> The net80211 regulatory domain code doesn't check for channels >11 in
> 11b/g/bg mode if the ecm bit isn't set when the channel list is
> assembled.
> And that only gets done when you configure the regulatory domain -
> when setting/clearing the ecm flag, it doesn't trigger reinitialising
> the channel list.
> 
> Hence why I said "set ecm bit, reset channel list, let me know how it
> goes."
> 
> Thanks,
> 
> 
> Adrian
> 
> On 28 December 2012 07:17, Carsten Wiedmann <carsten_sttgt at gmx.de> wrote:
> > Hi Adrian,
> >
> > I guess you mean:
> > ifconfig wlan0 regdomain ETSI
> > or
> > ifconfig wlan0 country DE
> >
> > But this makes no difference. I only have the channels 1-11.
> >
> > And "ifconfig wlan0" is always showing the correct:
> > "regdomain ETSI country DE"
> >
> >
> > Of course, I don't understand why it isn't enough to set "country DE" in
> "/etc/rc.conf"?
> >
> >
> > From "man ifconfig" --> country:
> > | Set the country code to use in calculating the regulatory con-
> > | straints for operation.  In particular the set of available chan-
> > | nels, how the wireless device will operation on the channels, and
> >
> >
> > From "man regdomain" (The regdomain.xml file):
> > | This information is used by the ifconfig(8) program to construct
> regula-
> > | tory state for download to the system.
> >
> >
> > And in "/etc/regdomain.xml" I have:
> > | <rd id="etsi">
> > |   <name>ETSI</name>
> > |   <sku>0x30</sku>
> > |   <netband mode="11b">
> > |     <band>
> > |       <freqband ref="F1_2412_2472"/>
> > |       <maxpower>30</maxpower>
> > |       <flags>IEEE80211_CHAN_B</flags>
> > |     </band>
> > |   </netband>
> > |   <netband mode="11g">
> > |     <band>
> > |       <freqband ref="F1_2412_2472"/>
> > |       <maxpower>30</maxpower>
> > |       <flags>IEEE80211_CHAN_G</flags>
> > |     </band>
> > |   </netband>
> > | ...
> >
> > 2412 is channel 1
> > 2472 is channel 13
> >
> > Regards,
> > Carsten
> >
> > -------- Original-Nachricht --------
> >> Datum: Fri, 28 Dec 2012 06:29:19 -0800
> >> Von: Adrian Chadd <adrian at freebsd.org>
> >> An: Carsten Wiedmann <carsten_sttgt at gmx.de>
> >> CC: freebsd-wireless at freebsd.org
> >> Betreff: Re: kern/174722: [wlan] can\'t use channel 12 and 13 (14) with
> my wifi interface
> >
> >> Hm, ok, so try:
> >>
> >> ifconfig wlan0 down
> >> ifconfig wlan0 ecm
> >> ifconfig wlan0 regdomain DE
> >> ifconfig wlan0 up
> >> ifconfig wlan0 list channel
> >>
> >>
> >>
> >> Adrian
> >>
> >>
> >> On 28 December 2012 04:50, Carsten Wiedmann <carsten_sttgt at gmx.de>
> wrote:
> >> > The following reply was made to PR kern/174722; it has been noted by
> >> GNATS.
> >> >
> >> > From: "Carsten Wiedmann" <carsten_sttgt at gmx.de>
> >> > To: bug-followup at FreeBSD.org, carsten_sttgt at gmx.de
> >> > Cc:
> >> > Subject: Re: kern/174722: [wlan] can't use channel 12 and 13 (14)
> with
> >> my wifi
> >> >  interface
> >> > Date: Fri, 28 Dec 2012 13:47:59 +0100
> >> >
> >> >  Hmmm, doesn't work:
> >> >
> >> >  freebsd# ifconfig wlan0 list regdomain
> >> >  :regdomain ETSI country DE anywhere ecm
> >> >  Channel   1 : 2412      MHz 11b          Channel   6 : 2437      MHz
> >> 11g
> >> >  Channel   1 : 2412      MHz 11g          Channel   7 : 2442      MHz
> >> 11b
> >> >  Channel   2 : 2417      MHz 11b          Channel   7 : 2442      MHz
> >> 11g
> >> >  Channel   2 : 2417      MHz 11g          Channel   8 : 2447      MHz
> >> 11b
> >> >  Channel   3 : 2422      MHz 11b          Channel   8 : 2447      MHz
> >> 11g
> >> >  Channel   3 : 2422      MHz 11g          Channel   9 : 2452      MHz
> >> 11b
> >> >  Channel   4 : 2427      MHz 11b          Channel   9 : 2452      MHz
> >> 11g
> >> >  Channel   4 : 2427      MHz 11g          Channel  10 : 2457      MHz
> >> 11b
> >> >  Channel   5 : 2432      MHz 11b          Channel  10 : 2457      MHz
> >> 11g
> >> >  Channel   5 : 2432      MHz 11g          Channel  11 : 2462      MHz
> >> 11b
> >> >  Channel   6 : 2437      MHz 11b          Channel  11 : 2462      MHz
> >> 11g
> >> >
> >> >  BTW:
> >> >  Even "ifconfig wlan0 ecm" is changing this setting, I can't find
> "ecm"
> >> in "man ifconfig"?
> >> >
> >> > _______________________________________________
> >> > freebsd-wireless at freebsd.org mailing list
> >> > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless
> >> > To unsubscribe, send any mail to
> >> "freebsd-wireless-unsubscribe at freebsd.org"