Re: wlan can't discover known networks after relocating

From: Cy Schubert <Cy.Schubert_at_cschubert.com>
Date: Thu, 19 Sep 2019 18:25:41 -0700
In message <7938e5fa-67da-35fa-10d0-ee3004438df7_at_FreeBSD.org>, Johannes 
Lundber
g writes:
> 
> On 9/19/19 3:06 PM, Adrian Chadd wrote:
> > So roaming in ifconfig/net80211 is what's set to manual.
> >
> > wpa_supplicant right now does RSSI threshold based roaming. All of the
> > roaming and network preferences when wpa_supplicant is running is done
> > in wpa_supplicant. That's where you have to look. Ideally
> > wpa_supplicant would be triggering bgscan too periodically rather than
> > only when the RSSI is low.
> >
> >
> >
> > -adrian
> >
> >
> > On Thu, 19 Sep 2019 at 15:04, Cy Schubert <cy.schubert_at_gmail.com
> > <mailto:cy.schubert_at_gmail.com>> wrote:
> >
> >     On September 19, 2019 8:20:07 AM PDT, Adrian Chadd
> >     <adrian.chadd_at_gmail.com <mailto:adrian.chadd_at_gmail.com>> wrote:
> >     >Roaming is done in wpa_supplicant when it's running.That's where the
> >     >smarts
> >     >need to be. :(
> >     >
> >     >
> >     >
> >     >-adrian
> >     >
> >     >
> >     >On Thu, 19 Sep 2019 at 05:44, Bjoern A. Zeeb
> >     ><bzeeb-lists_at_lists.zabbadoz.net
> >     <mailto:bzeeb-lists_at_lists.zabbadoz.net>>
> >     >wrote:
> >     >
> >     >> On 19 Sep 2019, at 12:28, Tom Jones wrote:
> >     >>
> >     >> Hi,
> >     >>
> >     >> freebsd-wireless might be a better list for all this ..
> >     >>
> >     >>
> >     >> > On Tue, Sep 17, 2019 at 04:36:28PM +0000, Poul-Henning Kamp
> >     wrote:
> >     >> >> --------
> >     >> >> In message <707bcd3f-fa6b-82eb-fa8f-09c4b800f477_at_FreeBSD.org>,
> >     >> >> Johannes Lundber
> >     >> >> g writes:
> >     >> >>
> >     >> >>> For a long time now I have had this problem with iwm and wlan0.
> >     >> >>> Whenever
> >     >> >>> I move between work and home it won't reconnect
> >     automatically and
> >     >I
> >     >> >>> have
> >     >> >>> to do wlan0 scan manually for it to pick up the different
> >     >network.
> >     >> >>
> >     >> >> I suffer from the dreaded "reason=0" when I move inside my
> >     house:
> >     >> >>
> >     >> >>      > scan
> >     >> >>      OK
> >     >> >>      <3>CTRL-EVENT-SCAN-RESULTS
> >     >> >>      <3>Trying to associate with 6c:3b:6b:3d:a2:e9
> >     >(SSID='Palombia'
> >     >> >> freq=2452 MHz)
> >     >> >>      <3>CTRL-EVENT-DISCONNECTED bssid=6c:3b:6b:3d:a2:e9 reason
> =0
> >     >> >>      <3>CTRL-EVENT-SCAN-RESULTS
> >     >> >>      <3>Trying to associate with 6c:3b:6b:ab:ce:d4
> >     >(SSID='Palombia'
> >     >> >> freq=2412 MHz)
> >     >> >>      <3>Associated with 6c:3b:6b:ab:ce:d4
> >     >> >>
> >     >> >> a2:e9 is the loudest AP here in my office, but my I have been in
> >     >the
> >     >> >> other end of the house iwn consistently fails to associate
> >     with it
> >     >> >> and
> >     >> >> and keeps picking the weaker AP in the far end.
> >     >> >>
> >     >> >> Eventually (hours!) it disconnects from the weaker ap, also with
> >     >> >> "reason=0" and gets it right:
> >     >> >>
> >     >> >>      <3>WPA: Group rekeying completed with 6c:3b:6b:ab:ce:d4
> >     >[GTK=CCMP]
> >     >> >>      <3>CTRL-EVENT-DISCONNECTED bssid=6c:3b:6b:ab:ce:d4 reason
> =0
> >     >> >>      <3>CTRL-EVENT-SCAN-RESULTS
> >     >> >>      <3>Trying to associate with 6c:3b:6b:3d:a2:e9
> >     >(SSID='Palombia'
> >     >> >> freq=2452 MHz)
> >     >> >>      <3>Associated with 6c:3b:6b:3d:a2:e9
> >     >> >>      <3>WPA: Key negotiation completed with 6c:3b:6b:3d:a2:e9
> >     >[PTK=CCMP
> >     >> >> GTK=CCMP]
> >     >> >>      <3>CTRL-EVENT-CONNECTED - Connection to 6c:3b:6b:3d:a2:e9
> >     >> completed
> >     >> >> [id=3 id_str=]
> >     >> >>      <3>WPA: Group rekeying completed with 6c:3b:6b:3d:a2:e9
> >     >[GTK=CCMP]
> >     >> >>
> >     >> >> And yes, working roaming would be nice too...
> >     >> >
> >     >> > I have the problem that when roaming networks become disabled
> >     >> >
> >     >> >       $ wpa_cli
> >     >> >       Selected interface 'wlan0'
> >     >> >
> >     >> >       Interactive mode
> >     >> >
> >     >> >       > list_networks
> >     >> >       network id / ssid / bssid / flags
> >     >> >       0       network1        any     [CURRENT]
> >     >> >       1       network2 any    [DISABLED]
> >     >> >       2       network3 any    [DISABLED]
> >     >> >       3       network4 any    [DISABLED]
> >     >> >       4       network5 any    [DISABLED]
> >     >> >       Selected interface 'wlan0'
> >     >> >
> >     >> >
> >     >> > I address this by doing network_enable x in wpa_cli and it all
> >     >comes
> >     >> > back. I asked Adrian about this in the past, but it needs some
> >     >> > debugging
> >     >> > to pin down.
> >     >>
> >     >>
> >     >> Is this iwm(4) as well in your case or another card?
> >     >>
> >     >> /bz
> >     >> _______________________________________________
> >     >> freebsd-wireless_at_freebsd.org
> >     <mailto:freebsd-wireless_at_freebsd.org> mailing list
> >     >> https://lists.freebsd.org/mailman/listinfo/freebsd-wireless
> >     >> To unsubscribe, send any mail to
> >     >"freebsd-wireless-unsubscribe_at_freebsd.org
> >     <mailto:freebsd-wireless-unsubscribe_at_freebsd.org>
> >     >> "
> >     >>
> >     >_______________________________________________
> >     >freebsd-current_at_freebsd.org <mailto:freebsd-current_at_freebsd.org>
> >     mailing list
> >     >https://lists.freebsd.org/mailman/listinfo/freebsd-current
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> >     <mailto:freebsd-current-unsubscribe_at_freebsd.org>"
> >
> >     With wpa_supplicant running roaming is set to manual. Bgscan
> >     should be enabled. 
> >
> >     At home we have two n (and 2 g) wifi networks. When powering off
> >     one ap it connects to the other (in addition to using lagg to
> >     failover from ethernet to wifi and back).
> >
> >     Your wpa_supplicant should contain each ssid you intend to use. A
> >     wildcard can be used for open networks.
> >
> >     It's a while since I've tested this functionality but I can test
> >     again when I get home tonight.
> >
> >
> >     -- 
> >     Pardon the typos and autocorrect, small keyboard in use.
> >     Cheers,
> >     Cy Schubert <Cy.Schubert_at_cschubert.com
> >     <mailto:Cy.Schubert_at_cschubert.com>>
> >     FreeBSD UNIX: <cy_at_FreeBSD.org> Web: http://www.FreeBSD.org
> >
> >             The need of the many outweighs the greed of the few.
> >
>
> Hmm so in other words, you have to set bgscan for each network entry you
> want roaming? What are some good values for this?

Just tested here. It worked after a short delay, with a not-so-young laptop 
with iwn.

wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether 20:NN:NN:NN:NN:NN
	groups: wlan
	ssid "BBBBBBBB" channel 1 (2412 MHz 11g ht/20) bssid 78:BB:BB:BB:BB:BB
	regdomain FCC country US authmode WPA2/802.11i privacy ON
	deftxkey UNDEF AES-CCM 2:128-bit AES-CCM 3:128-bit txpower 30
	bmiss 120 scanvalid 16959 protmode CTS ampdulimit 64k -amsdutx amsdurx
	shortgi -stbc -ldpc wme roaming MANUAL
	media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
	status: associated
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

And the gory details:

Sep 19 17:21:35 slippy wpa_supplicant[381]: wlan0: CTRL-EVENT-DISCONNECTED 
bssid=a6:NN:NN:NN:NN:NN reason=0
Sep 19 17:21:35 slippy wpa_supplicant[381]: wlan0: Trying to associate with 
a6:NN:NN:NN:NN:NN (SSID='AAA' freq=2462 MHz)
Sep 19 17:21:35 slippy wpa_supplicant[381]: Failed to add supported 
operating classes IE
Sep 19 17:21:35 slippy wpa_supplicant[381]: wlan0: Associated with 
a6:NN:NN:NN:NN:NN
Sep 19 17:21:45 slippy wpa_supplicant[381]: wlan0: Authentication with 
a6:08:ea:9c:a0:84 timed out.
Sep 19 17:21:45 slippy wpa_supplicant[381]: wlan0: CTRL-EVENT-DISCONNECTED 
bssid=a6:NN:NN:NN:NN:NN reason=3 locally_generated=1
Sep 19 17:21:47 slippy wpa_supplicant[381]: wlan0: Trying to associate with 
78:NN:NN:NN:NN:NN (SSID='BBBBBBBBB' freq=2412 MHz)
Sep 19 17:21:47 slippy wpa_supplicant[381]: Failed to add supported 
operating classes IE
Sep 19 17:21:47 slippy wpa_supplicant[381]: wlan0: Associated with 
78:NN:NN:NN:NN:NN
Sep 19 17:21:48 slippy wpa_supplicant[381]: wlan0: WPA: Key negotiation 
completed with 78:NN:NN:NN:NN:NN [PTK=CCMP GTK=CCMP]
Sep 19 17:21:48 slippy wpa_supplicant[381]: wlan0: CTRL-EVENT-CONNECTED - 
Connection to 78:NN:NN:NN:NN:NN completed [id=7 id_str=]

AAA is my cell phone. the B's are $JOB.

The relevant parts of my wpa_supplicant.conf:

network={
	ssid="AAA"
	priority=6
	proto=RSN WPA
	key_mgmt=WPA-PSK
	pairwise=CCMP
	group=CCMP
	psk="x"
}

network={
	ssid="BBBBBBBBB"
	scan_ssid=1
	priority=5
	proto=RSN WPA
	key_mgmt=WPA-PSK
	pairwise=CCMP TKIP
	group=CCMP TKIP
	psk="y"
}

#Wildcard match for SSID (plaintext APs only). This example select any
#open AP regardless of its SSID.
network={
	priority=0
	disabled=1
	key_mgmt=NONE
}

Hope this helps.


-- 
Cheers,
Cy Schubert <Cy.Schubert_at_cschubert.com>
FreeBSD UNIX:  <cy_at_FreeBSD.org>   Web:  http://www.FreeBSD.org

	The need of the many outweighs the greed of the few.
Received on Thu Sep 19 2019 - 23:25:53 UTC

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