Z-Com XG-762N Customization of VID/PID Table, Special Mode for Embedded Station Chariot Test

note:

@-i: interface name: eth1

@-c: Configuration file: wpa_supplicant_psk.conf

@-D: The name of network interface.

You will see the following message if wpa-psk connection is built successfully.

...

WPA: Sending EAPOL-Key 2/2 ---> The Group handshake is about to finish.

...

EAPOL: SUPP_PAE entering state SUCCESS

EAP: EAP entering state SUCCESS

EAPOL: SUPP_PAE entering state AUTHENTICATED

EAPOL: SUPP_BE entering state IDLE

Note of wpa supplicant operation issue:

The WPA supplicant should be keep running during connection. If you press Ctrl-C to stop the wpa supplicant, it will also close the network interface card by "zd1205_close" call back routine. So you have to issue ifconfig ethx up again before using the network interface card.

3.7 Customization of VID/PID Table

Someone may want to drive any NIC with XG-762N chipset. But, if its VID/PID isn¡¯t listed in the driver, the linux kernel won¡¯t load the XG-762N driver to serve the device. You can add the device¡¯s VID/PID to the driver source. Then, the kernel will load driver next time you plug the USB dongle.

In the source file, src/zdusb.c, A static structure, XG-762N_ids, stores the VID/PID list of supported products. You can add your dongle¡¯s VID/PID here. Then, remake, install the driver and plug the dongle. You will see it works now.

3.8 Special Mode for Embedded Station Chariot Test

In an embedded system, mostly, there is no NetIQ chariot endpoint, for WiFi testing, to test performance. With this mode, we can bridge the Ethernet and WLAN. The PC behind the Ethernet runs endpoint and testing data go through the station¡¯s wireless interface to measure the performance.

The mechanism is to specify the MAC address for association with AP. Generally, we associate with AP using the station¡¯s MAC address. If we bridge the wired and wireless interfaces, data from wired interface will be dropped by AP. Because PC¡¯s MAC address is filled in source address of data frames. AP drops the frames because the source address is not in associated stations list. If we can use AP¡¯s address for association, we can run chariot on PC to test station wireless interface performance. This is just like what we do in AP mode.

Someone may say that "Can¡¯t I just set station¡¯s MAC as PC¡¯s via ifconfig ethX hw ether". Yes, perhaps, you can. But most bridge will drop the data when the source address is identical to its interfaces¡¯.Therefore, we must let the address for association and

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