Air 802 Linux USB?ADG?2 Especificaciones descargar pdf (Pagina 25)

Note of WPA supplicant operation issue:

The WPA supplicant should be kept running during operation. If you press Ctrl-C to stop the

WPA supplicant, it will also close the network interface card by “zd1205_close” call back

routine. In this case, you will have to issue ifconfig ethx up again before using the network

interface card.

3.24 CUSTOMIZATIONOFVID/PIDTABLE

You may desire to drive any NIC via the AIR802 USB adapter with the Zydas chipset. However,

if the VID/PID isn’t listed in the driver, the linux kernel won’t load the AIR802 driver to serve the

device. You can add the device’s VID/PID to the driver source. Then, the kernel will load the

driver next time you plug in the USB device.

In the source file, src/zdusb.c, A static structure, AIR802_ids, stores the VID/PID list of

supported products. You can add your devices VID/PID here. Then, remake, install the driver

and plug in the USB adapter. You will then see it in working mode.

3.25 SPECIALMODEFOREMBEDDEDSTATIONCHARIOTTEST

In an embedded system, mostly, there is no NetIQ chariot endpoint, for Wi-Fi testing, to test

performance. With this mode, we can bridge the Ethernet and WLAN. The PC behind the

Ethernet runs endpoint and testing data goes through the station’s wireless interface to measure

the performance.

The mechanism is to specify the MAC address for association with the AP. Generally, we

associate with the AP using the station’s MAC address. If we bridge the wired and wireless

interfaces, data from the wired interface will be dropped by the AP. This is because the PC’s

MAC address is contained in the source address of the data frames. The AP drops the frames

because the source address is not in the associated station’s list. If we can use the AP’s

address for association, we can run chariot on the PC to test station wireless interface

performance. This is exactly like what is done in AP mode.

Someone may say, “Can’t I just set the station’s MAC as PC’s via ifconfig ethX hw ether?” Yes,

perhaps you could. But most bridges will drop the data when the source address is identical to

its interfaces. Therefore, we must let the address for association and address of the station be

different.

The command to specify association address is very simple:

ifconfig ethX down

ifconfig ethX hw ether 01XXXXXXXXXX:

ifconfig ethX up

You must set the first byte = 01 to indicate this is for association address assignment only.

The remainder XXXXXXXXXX is byte 1-byte5 of PC’s MAC address. Now, you can setup a

bridge and add both wired and wireless interface. Then, you may try to ping to test the

connectivity.

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Air 802 Linux USB?ADG?2 Especificaciones Pagina 25