Either AP or IBSS, but not both

[Arend van Spriel]

On 12/29/14 17:28, Tuc at Beach House wrote:
> Sorry... Got away from me
>
> Hi,
>
> Raspberry Pi Model B+, Linux blue 3.12.28+  #709 PREEMPT Mon Sep 8 15:28:00
> BST 2014 armv6l GNU/Linux, hostapd v2.3 (defconfig), Ralink using rt2800usb
> driver.
>
> What I'm trying to accomplish is using a single interface to be an AP on
> one SSID, and ad-hoc on another SSID. The problem is that I can either do
> one, or the other, but not both...
>
> root at blue:~# iwconfig wlan1
> wlan1     IEEE 802.11bgn  ESSID:off/any
>            Mode:Managed  Access Point: Not-Associated   Tx-Power=0 dBm
>            Retry  long limit:7   RTS thr:off   Fragment thr:off
>            Encryption key:off
>            Power Management:on
>
> So if I set up ad-hoc, works fine :
>
> root at blue:~# iw dev wlan1 interface add wlan10 type ibss
> root at blue:~# iwconfig wlan10
> wlan10    IEEE 802.11bgn  ESSID:off/any
>            Mode:Ad-Hoc  Cell: Not-Associated   Tx-Power=0 dBm
>            Retry  long limit:7   RTS thr:off   Fragment thr:off
>            Encryption key:off
>            Power Management:on
>
> root at blue:~# iwconfig wlan10 essid WEDDING
> root at blue:~# ifconfig wlan10 10.4.4.8 netmask 255.255.255.0
> root at blue:~# ping -c2 new
> PING new.wedding.ramolaandscott,com (10.4.4.6) 56(84) bytes of data.
> 64 bytes from new.wedding.ramolaandscott,com (10.4.4.6): icmp_req=1 ttl=64
> time=3.51 ms
> 64 bytes from new.wedding.ramolaandscott,com (10.4.4.6): icmp_req=2 ttl=64
> time=1.02 ms
>
> --- new.wedding.ramolaandscott,com ping statistics ---
> 2 packets transmitted, 2 received, 0% packet loss, time 1001ms
> rtt min/avg/max/mdev = 1.024/2.268/3.512/1.244 ms
>
>
> Now invoke hostapd with the following /etc/hostapd/hostapd.conf :
>
> root at blue:~# cat /etc/hostapd/hostapd.conf
> interface=wlan1
> ssid=FREE
> hw_mode=g
> channel=1
> root at blue:~# /usr/local/bin/hostapd -dd /etc/hostapd/hostapd.conf
> (Please seehttp://pastebin.com/cjqukwyH)
>
>
> But if I reboot and try backwards :
>
> root at blue:~# hostapd -dd /etc/hostapd/hostapd.conf
> (Please seehttp://pastebin.com/Tdc5dz81)
>
>
> And its fine, but then :
>
> root at blue:~# iw dev wlan1 interface add wlan10 type ibss
> root at blue:~# iwconfig wlan10
> wlan10    IEEE 802.11bgn  ESSID:off/any
>            Mode:Ad-Hoc  Cell: Not-Associated   Tx-Power=20 dBm
>            Retry  long limit:7   RTS thr:off   Fragment thr:off
>            Encryption key:off
>            Power Management:on
>
> root at blue:~# iwconfig wlan10 essid WEDDING
> root at blue:~# ifconfig wlan10
> wlan10    Link encap:Ethernet  HWaddr 00:c1:41:07:07:d1
>            BROADCAST MULTICAST  MTU:1500  Metric:1
>            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
>
> root at blue:~# ifconfig wlan10 10.4.4.8 netmask 255.255.255.0
> SIOCSIFFLAGS: Device or resource busy
> root at blue:~# ifconfig wlan10
> wlan10    Link encap:Ethernet  HWaddr 00:c1:41:07:07:d1
>            inet addr:10.4.4.8  Bcast:10.4.4.255  Mask:255.255.255.0
>            BROADCAST MULTICAST  MTU:1500  Metric:1
>            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
>
> root at blue:~# ping -c2 new
> PING new.wedding.ramolaandscott,com (10.4.4.6) 56(84) bytes of data.
>
> --- new.wedding.ramolaandscott,com ping statistics ---
> 2 packets transmitted, 0 received, 100% packet loss, time 1001ms
>
>
>
> Any idea where to look or what to do to get them to work and play together?

You are using hostapd, iw, and iwconfig. So it would make more sense to 
ask this question on linux-wireless list or the ralink driver 
maintainer. Whether or not certain combinations of interfaces are 
allowed on a single wifi device is determined by the driver.

Regards,
Arend

> Thanks, Tuc
>
>
>
> _______________________________________________
> HostAP mailing list
> HostAP at lists.shmoo.com
> http://lists.shmoo.com/mailman/listinfo/hostap