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Virtual Interfaces; using hostapd AND wpa_supplicant on the same physical device

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Hi List,

I'd like to create a temporary hotspot using an other wireless network which is already there. My kids have some devices (like Nintendo DS) which are only capable using WEP.
So I want to create a temporary hotspot which I can filter on my own.

Years ago I was able to do such a configuration, but this was before mac80211 (I was then often on trade fairs, with very costly wlan-tariffs...).

Problem is: I get an error about a network name already exist - either on hostapd and wpa_supplicant - everytime the last program started.

> iw phy phy0 interface add net0 type managed
> hostapd -dd hostapd.conf
> wpa_supplicant -dd -Dwext -inet0 -cwpa_supplicant.conf

hostapd.conf:
> interface=wlan0
> driver=nl80211
> bridge=br0
> ssid=TEST
> wme_enabled=0
> channel=9
> hw_mode=g

wpa_supplicant.conf
> ctrl_interface=DIR=/var/run/wpa_supplicant
> network={
>         ssid="CRYPT_WLAN"
>         scan_ssid=1
>         key_mgmt=WPA-PSK
>         psk="PSKpskPSK"
> }

lsmod|grep 80211
> mac80211              393459  1 ath5k
> cfg80211                172427  3 ath5k,ath,mac80211


lspci -v
> 0a:03.0 Ethernet controller: Atheros Communications Inc. AR2413 802.11bg NIC (rev 01)
>         Subsystem: AMBIT Microsystem Corp. Device 0418
>         Flags: bus master, medium devsel, latency 168, IRQ 18
>         Memory at d0000000 (32-bit, non-prefetchable) [size=64K]
>         Capabilities: [44] Power Management version 2
>         Kernel driver in use: ath5k
>         Kernel modules: ath5k

/proc/version:
> Linux version 3.0.0-15-generic (buildd@zirconium) (gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) ) #26-Ubuntu SMP Fri Jan 20 15:59:53 UTC 2012

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