[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Rohit Kumar]

Hello,

how can i configure hostapd build with nl80211 driver support.
currenty when i run hostapd, it says
>nl80211 driver initialization failed.
With Regards,

Rohit Kumar
+82 1073149173
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[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Gustavo Zacarias]

On 07/30/2014 10:48 PM, Rohit Kumar wrote:

> Hello,
> 
> how can i configure hostapd build with nl80211 driver support.
> currenty when i run hostapd, it says
>>nl80211 driver initialization failed.
> With Regards,

Hi.
That error message is terribly generic, how about a little more
information on what hostapd says before that and your hostapd config?
A dump of the wlan card information would be useful too, typically via
the iw package "iw phy0 info" since it's possible you're trying to do
master mode on a device that doesn't support it.
Regards.

[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Rohit Kumar]

Hello,
On Thu, Jul 31, 2014 at 11:39 AM, Gustavo Zacarias <gustavo@zacarias.com.ar>
wrote:

> On 07/30/2014 10:48 PM, Rohit Kumar wrote:
>
> > Hello,
> >
> > how can i configure hostapd build with nl80211 driver support.
> > currenty when i run hostapd, it says
> >>nl80211 driver initialization failed.
> > With Regards,
>
> Hi.
> That error message is terribly generic, how about a little more
> information on what hostapd says before that and your hostapd config?
>
hostapd.conf is very basic :
interface=wlan0
driver=nl80211
ssid=test
channel=1

hostapd hostapd.conf -dd

generates following output

 random: Trying to read entropy from
/dev/random
Configuration file:
/root/hostapd-test.conf

nl80211: Could not add multicast membership for vendor events: -2 (No such
file or directory)
rfkill: Cannot open RFKILL control
device
nl80211: RFKILL status not
available
nl80211: Remove monitor interface:
refcount=0
netlink: Operstate: ifindex=3 linkmode=0 (kernel-control), operstate=6
(IF_OPER_UP)
nl80211: Set mode ifindex 3 iftype 2
(STATION)
nl80211: Failed to set interface 3 to mode 2: -19 (No such
device)
nl80211 driver initialization
failed.
hostapd_interface_deinit_free(0xe78b8)

hostapd_interface_deinit_free: num_bss=1
conf->num_bss=1
hostapd_interface_deinit(0xe78b8)

hostapd_bss_deinit: deinit bss
wlan0
hostapd_cleanup(hapd=0xe8518
(wlan0))
hostapd_free_hapd_data: Interface wlan0 wasn't
started
hostapd_interface_deinit_free: driver=(nil) drv_priv=(nil) ->
hapd_deinit
hostapd_interface_free(0xe78b8)

hostapd_interface_free: free hapd
0xe8518
hostapd_cleanup_iface(0xe78b8)

hostapd_cleanup_iface_partial(0xe78b8)

hostapd_cleanup_iface: free iface=0xe78b8

A dump of the wlan card information would be useful too, typically via
> the iw package "iw phy0 info" since it's possible you're trying to do
> master mode on a device that doesn't support it.
>

iw wlan0 info
command failed: No such device (-19)

but iwconfig works fine even when i run
iwconfig wlan0 mode master
it does not show error.

the USB wifi device works well on PC, so device supports master mode

> Regards.
>
> with regards,
Rohit Kumar
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[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Baruch Siach]

Hi Rohit,

On Thu, Jul 31, 2014 at 12:40:30PM +0900, Rohit Kumar wrote:
> On Thu, Jul 31, 2014 at 11:39 AM, Gustavo Zacarias <gustavo@zacarias.com.ar>
> wrote:
> > On 07/30/2014 10:48 PM, Rohit Kumar wrote:
> > > how can i configure hostapd build with nl80211 driver support.
> > > currenty when i run hostapd, it says
> > >>nl80211 driver initialization failed.
> >
> > That error message is terribly generic, how about a little more
> > information on what hostapd says before that and your hostapd config?
> >
> hostapd.conf is very basic :
> interface=wlan0
> driver=nl80211
> ssid=test
> channel=1

[...]

> > A dump of the wlan card information would be useful too, typically via
> > the iw package "iw phy0 info" since it's possible you're trying to do
> > master mode on a device that doesn't support it.
> 
> iw wlan0 info
> command failed: No such device (-19)
> 
> but iwconfig works fine even when i run
> iwconfig wlan0 mode master
> it does not show error.
> 
> the USB wifi device works well on PC, so device supports master mode

It seems that your driver only support the old deprecated wireless extension 
API. You may have better luck if you enable CONFIG_DRIVER_WEXT in 
hostapd/defconfig. You'll also need 'driver=wext' in you hostapd.conf.

baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
   - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -

[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Rohit Kumar]

On Thu, Jul 31, 2014 at 12:51 PM, Baruch Siach <baruch@tkos.co.il> wrote:

> Hi Rohit,
>
> On Thu, Jul 31, 2014 at 12:40:30PM +0900, Rohit Kumar wrote:
> > On Thu, Jul 31, 2014 at 11:39 AM, Gustavo Zacarias <
> gustavo at zacarias.com.ar>
> > wrote:
> > > On 07/30/2014 10:48 PM, Rohit Kumar wrote:
> > > > how can i configure hostapd build with nl80211 driver support.
> > > > currenty when i run hostapd, it says
> > > >>nl80211 driver initialization failed.
> > >
> > > That error message is terribly generic, how about a little more
> > > information on what hostapd says before that and your hostapd config?
> > >
> > hostapd.conf is very basic :
> > interface=wlan0
> > driver=nl80211
> > ssid=test
> > channel=1
>
> [...]
>
> > > A dump of the wlan card information would be useful too, typically via
> > > the iw package "iw phy0 info" since it's possible you're trying to do
> > > master mode on a device that doesn't support it.
> >
> > iw wlan0 info
> > command failed: No such device (-19)
> >
> > but iwconfig works fine even when i run
> > iwconfig wlan0 mode master
> > it does not show error.
> >
> > the USB wifi device works well on PC, so device supports master mode
>
> It seems that your driver only support the old deprecated wireless
> extension
> API. You may have better luck if you enable CONFIG_DRIVER_WEXT in
> hostapd/defconfig. You'll also need 'driver=wext' in you hostapd.conf.
>
> i tried to edit defconfig at buildroot/output/build/hostapd-2.2/hoatapd
but "CONFIG_DRIVER_WEXT" parameter does not exist in the file.
how do i do it?

i also have the source for wifi driver which i am using, can i change
something in driver to make it support new API?

>  baruch
>
> --
>


With Regards,

Rohit Kumar
+82 1073149173

>       http://baruch.siach.name/blog/                  ~. .~   Tk Open
> Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
>
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[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Baruch Siach]

Hi Rohit,

On Thu, Jul 31, 2014 at 01:07:08PM +0900, Rohit Kumar wrote:
> On Thu, Jul 31, 2014 at 12:51 PM, Baruch Siach <baruch@tkos.co.il> wrote:
> > On Thu, Jul 31, 2014 at 12:40:30PM +0900, Rohit Kumar wrote:
> > > On Thu, Jul 31, 2014 at 11:39 AM, Gustavo Zacarias <
> > gustavo at zacarias.com.ar>
> > > wrote:
> > > > On 07/30/2014 10:48 PM, Rohit Kumar wrote:
> > > > > how can i configure hostapd build with nl80211 driver support.
> > > > > currenty when i run hostapd, it says
> > > > >>nl80211 driver initialization failed.
> > > >
> > > > That error message is terribly generic, how about a little more
> > > > information on what hostapd says before that and your hostapd config?
> > > >
> > > hostapd.conf is very basic :
> > > interface=wlan0
> > > driver=nl80211
> > > ssid=test
> > > channel=1
> >
> > [...]
> >
> > > > A dump of the wlan card information would be useful too, typically via
> > > > the iw package "iw phy0 info" since it's possible you're trying to do
> > > > master mode on a device that doesn't support it.
> > >
> > > iw wlan0 info
> > > command failed: No such device (-19)
> > >
> > > but iwconfig works fine even when i run
> > > iwconfig wlan0 mode master
> > > it does not show error.
> > >
> > > the USB wifi device works well on PC, so device supports master mode
> >
> > It seems that your driver only support the old deprecated wireless
> > extension
> > API. You may have better luck if you enable CONFIG_DRIVER_WEXT in
> > hostapd/defconfig. You'll also need 'driver=wext' in you hostapd.conf.
> >
> > i tried to edit defconfig at buildroot/output/build/hostapd-2.2/hoatapd
> but "CONFIG_DRIVER_WEXT" parameter does not exist in the file.
> how do i do it?

You can just add it. Not all driver options appear in this file.

> i also have the source for wifi driver which i am using, can i change
> something in driver to make it support new API?

As far as I know this is not a trivial change, but you should better ask at 
the linux-wireless mailing list.

What hardware do you use? Maybe your device already has a nl80211 driver. Most 
commercially available devices have.

baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
   - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -

[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Rohit Kumar]

Hello,

On Thu, Jul 31, 2014 at 1:13 PM, Baruch Siach <baruch@tkos.co.il> wrote:

> Hi Rohit,
>
> On Thu, Jul 31, 2014 at 01:07:08PM +0900, Rohit Kumar wrote:
> > On Thu, Jul 31, 2014 at 12:51 PM, Baruch Siach <baruch@tkos.co.il>
> wrote:
> > > On Thu, Jul 31, 2014 at 12:40:30PM +0900, Rohit Kumar wrote:
> > > > On Thu, Jul 31, 2014 at 11:39 AM, Gustavo Zacarias <
> > > gustavo at zacarias.com.ar>
> > > > wrote:
> > > > > On 07/30/2014 10:48 PM, Rohit Kumar wrote:
> > > > > > how can i configure hostapd build with nl80211 driver support.
> > > > > > currenty when i run hostapd, it says
> > > > > >>nl80211 driver initialization failed.
> > > > >
> > > > > That error message is terribly generic, how about a little more
> > > > > information on what hostapd says before that and your hostapd
> config?
> > > > >
> > > > hostapd.conf is very basic :
> > > > interface=wlan0
> > > > driver=nl80211
> > > > ssid=test
> > > > channel=1
> > >
> > > [...]
> > >
> > > > > A dump of the wlan card information would be useful too, typically
> via
> > > > > the iw package "iw phy0 info" since it's possible you're trying to
> do
> > > > > master mode on a device that doesn't support it.
> > > >
> > > > iw wlan0 info
> > > > command failed: No such device (-19)
> > > >
> > > > but iwconfig works fine even when i run
> > > > iwconfig wlan0 mode master
> > > > it does not show error.
> > > >
> > > > the USB wifi device works well on PC, so device supports master mode
> > >
> > > It seems that your driver only support the old deprecated wireless
> > > extension
> > > API. You may have better luck if you enable CONFIG_DRIVER_WEXT in
> > > hostapd/defconfig. You'll also need 'driver=wext' in you hostapd.conf.
> > >
> > > i tried to edit defconfig at buildroot/output/build/hostapd-2.2/hoatapd
> > but "CONFIG_DRIVER_WEXT" parameter does not exist in the file.
> > how do i do it?
>
> You can just add it. Not all driver options appear in this file.
>
i will try it
do i need "make clean" after changes or i can just do "make" ?

>
> > i also have the source for wifi driver which i am using, can i change
> > something in driver to make it support new API?
>
> As far as I know this is not a trivial change, but you should better ask at
> the linux-wireless mailing list.
>
> What hardware do you use? Maybe your device already has a nl80211 driver.
> Most
> commercially available devices have.
>
i am using IPtime USB wifi  dongle it uses realtek 8188 chipset

>
> baruch
>
> --
>


With Regards,

Rohit Kumar
+82 1073149173

>       http://baruch.siach.name/blog/                  ~. .~   Tk Open
> Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
>
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[Buildroot] configure HOSTAPD build to enable nl80211 driver support

[Baruch Siach]

Hi Rohit,

On Thu, Jul 31, 2014 at 01:16:57PM +0900, Rohit Kumar wrote:
> On Thu, Jul 31, 2014 at 1:13 PM, Baruch Siach <baruch@tkos.co.il> wrote:
> > On Thu, Jul 31, 2014 at 01:07:08PM +0900, Rohit Kumar wrote:
> > > but "CONFIG_DRIVER_WEXT" parameter does not exist in the file.
> > > how do i do it?
> >
> > You can just add it. Not all driver options appear in this file.
>
> i will try it
> do i need "make clean" after changes or i can just do "make" ?

I'm not sure about that. Just try out.

> > > i also have the source for wifi driver which i am using, can i change
> > > something in driver to make it support new API?
> >
> > As far as I know this is not a trivial change, but you should better ask at
> > the linux-wireless mailing list.
> >
> > What hardware do you use? Maybe your device already has a nl80211 driver.
> > Most
> > commercially available devices have.
>
> i am using IPtime USB wifi  dongle it uses realtek 8188 chipset

You are out of luck, it seems. There is a driver for this chipset in the 
staging area of the kernel but its TODO file (drivers/staging/rtl8188eu/TODO) 
contains:

- switch to use LIB80211
- switch to use MAC80211

baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
   - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -