From: Girish Bn <Girish.BN@lnties.com>
To: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: wl12xx : ping to wlan0(Station) doesn't work after creating wlan1
 interface
Date: Fri, 18 Jan 2013 15:17:20 +0000
Message-ID: <45566970CF58C74CB52107862E0541CD1D1EB092@POCITMSEXMB02.LntUniverse.com> (sfid-20130118_161645_333151_BFF00BBE)
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Sender: linux-wireless-owner@vger.kernel.org

Hi,

Details of our platform is as follows
1. Hardware Platform: LPC313X
2. Kernel Version: 2.6.28.2
3. Compat Wireless package version: compat-wireless-3.5-rc5-1
Taken from http://linuxwireless.org/en/users/Download/stable/
4. WL1271 Firmware Revisions
a) Single Role : X.3.7.0.105 (Rev 6.3.7.0.105)
b) Multi-Role:  X.5.5.0.21 (Rev 6.5.3.0.21)

5. WPA Supplicant Version: wpa_supplicant_1.1
6. IW Tool Version: 3.2

We are enabling multi-role operation(Station and AP(P2P GO) mode) using the following commands
1.      Load the Compat wireless drivers (compat.ko,cfg80211.ko,mac80211.ko,compat_firmware_class.ko,rfkill_backport.ko, wlcore.ko,wl12xx.ko and wlcore_sdio.ko)

2.      Set wlan0 as station
#ifconfig wlan0 hw ether 08:00:28:34:56:22
#ifconfig wlan0 10.2.30.34 netmask 255.255.255.0 up

3.      Disable power save mode on wlan0
#iw wlan0 set power_save off

4.      wlan1 as GO (Group Owner)
Create a new interface called wlan1 which would be configured as a GO(Group Owner)
#iw phy0 interface add wlan1 type managed

Configure Ethernet and IP address of the wlan1 interface
#ifconfig wlan1 hw ether 08:00:28:44:56:83

5.      Start the interfaces

Start wlan0 as Station mode (run the WPA supplicant)
#./wpa_supplicant -d -Dnl80211 -c/wlan/wpa_supplicant_station.conf -iwlan0 -B

The wpa_supplicant_station.conf file contents is as follows
        ctrl_interface=/var/run/wpa_supplicant
        ap_scan=1

        network={
                ssid="Cisco_WPA2-TKIP/AES"
                psk="abcdefghijklmn*1234567890"
                proto=RSN
                key_mgmt=WPA-PSK
                pairwise=TKIP
                group=TKIP
                auth_alg=OPEN
        }
Get the ip addres for Station from AP
# udhcpc -i wlan0 -b

Start wlan1 in GO mode using the previously created p2p.conf(attached the file) file
#./wpa_supplicant -Dnl80211 -iwlan1 -c /wlan/p2p.conf &
The contents of p2p.conf is as follows
        ctrl_interface=/var/run/wpa_supplicant
        ap_scan=1
        device_name=TI_WLAN_P2P
        device_type=1-0050F204-1

        config_methods=label push_button

        # optional, can be useful for monitoring, forces
        # wpa_supplicant to use only channel 1 rather than
        # 1, 6 and 11:
        #p2p_listen_reg_class=81
        #p2p_listen_channel=1
        p2p_oper_reg_class=81
        p2p_oper_channel=1

        network={
                mode=3
                disabled=2
                ssid="DIRECT-BN"
                key_mgmt=WPA-PSK
                proto=RSN
                pairwise=CCMP
                group=CCMP TKIP
                psk="12345678"
        }

#./wpa_cli -i wlan1 p2p_group_add persistent=0 freq=2412

With the above steps the Role 1 and Role 2 will be started successfully
1.      Start the UDHCPD server
#echo 1 > /proc/sys/net/ipv4/ip_forward
#ifconfig wlan1 10.4.30.39
#udhcpd /wlan/udhcpd.conf


The issue is, after starting P2P GO, may be after 2 to 3mins, the ping operation from any other PC/Laptop which is connected to the same AP as Station(wlan0) fails.
However, if I start the ping from my device to the PC/Laptop, ping operation succeeds and also ping from other side works(which failed before).
We suspect some issue while creating the multi-role interface(wlan1 for P2P GO) is causing the problem.
Any suggestions are welcome

Thanks & Regards,
Girish
L&T IES,
KIADB Industrial Area,
Hebbal-Hootagalli, Mysore - 570 018
Telephone :  DID+91-821-2405552
Mobile: +91-9741206402
E-mail ID :Girish.BN@lnties.com
www.lnties.com

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