系统安装：D-Link DWL-G122 USB无线网卡驱动安装配置

D-Link DWL-G122 USB WLAN

1、修改内核, 增加WLAN支持
# cd /usr/src/linux-2.6.18-lemote
# make menuconfig
依次点击Device Drivers --->Network device support -->Wireless LAN (non-hamradio) -->
选中Wireless Lan drivers (non-hamradio) & Wireless Extensions 如下图所示

# make
# make modules_install
# cp vmlinux /boot/vmlinux-2.6.18-godson2e

2、下载rt73驱动程序
DWL-G122 H/W Ver: C1采用Ralink的rt73 (rt2571W)芯片组。
驱动程序从The rt2x00 Open Source Project网站上下载，如下所示：
# wget http://rt2x00.serialmonkey.com/rt73-cvs-daily.tar.gz

3、编译、安装驱动
由于下载的是cvs版本，解压后的目录名中的日期会变化，请自行修改。
# tar zxvf rt73-cvs-daily.tar.gz
# cd rt73-cvs-20070309/Module
# make
# make install

修改/etc/modprobe.d/aliases文件, 在最后增加一行：alias rausb0 rt73
然后运行/sbin/depmod -a

4、安装Wireless Tools
# apt-get install iwconfig
Reading package lists... Done
Building dependency tree... Done
E: Couldn't find package iwconfig
debian:/etc/network# apt-get install wireless-tools
Reading package lists... Done
Building dependency tree... Done
The following NEW packages will be installed:
wireless-tools
0 upgraded, 1 newly installed, 0 to remove and 7 not upgraded.
Need to get 108kB of archives.
After unpacking 365kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
wireless-tools
Install these packages without verification [y/N]? y
Get:1 http://www.lemote.com etch/main wireless-tools 28-1 [108kB]
Fetched 108kB in 5s (19.3kB/s)
Selecting previously deselected package wireless-tools.
(Reading database ... 92733 files and directories currently installed.)
Unpacking wireless-tools (from .../wireless-tools_28-1_mipsel.deb) ...
Setting up wireless-tools (28-1) ...

5、配置WLAN
重新启动机器，先用lsusb查看USB状态
# lsusb
Bus 004 Device 001: ID 0000:0000
Bus 005 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 002: ID 07d1:3c03 D-Link System

再用lsmod查看是否用rt73模块，
# lsmod
rt73 398144 0
uhci_hcd 25808 0

或从/var/log/messages中查看有没有下列信息：
Mar 10 20:09:57 localhost kernel: rtusb init ====>
Mar 10 20:09:57 localhost kernel: idVendor = 0x7d1, idProduct = 0x3c03
Mar 10 20:09:57 localhost kernel: usbcore: registered new driver rt73

启动接口
# ifconfig rausb0 up
# ifconfig
rausb0 Link encap:Ethernet  HWaddr 00:19:5B:81:B9:9E
      inet6 addr: fe80::219:5bff:fe81:b99e/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:270 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:17766 (17.2 KiB)  TX bytes:0 (0.0 B)

查看WLAN
# iwconfig
rausb0 RT73 WLAN  ESSID:""
      Mode:Managed  Frequency=2.412 GHz  Bit Rate=54 Mb/s
      RTS thr:off Fragment thr:off
      Encryption key:off
      Link Quality=0/100  Signal level:-121 dBm  Noise level:-115 dBm
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:0 Missed beacon:0

扫描WLAN，找到AP
# iwlist rausb0 scanning
rausb0 Scan completed :
      Cell 01 - Address: 00:15:E9:F3:3F:B0
                  ESSID:"dd-wrt"
                  Mode:Managed
                  Channel:1
                  Encryption key:on
                  Bit Rates:2 Mb/s

连接AP，使用5位ASCII密码
# iwconfig rausb0 essid "dd-wrt" mode Managed key s:*****

# iwconfig
rausb0 RT73 WLAN  ESSID:"dd-wrt"
      Mode:Managed  Frequency=2.412 GHz  Access Point: 00:15:E9:F3:3F:B0
      Bit Rate=54 Mb/s
      RTS thr:off Fragment thr:off
      Encryption key:****-****-**
      Link Quality=100/100  Signal level:-28 dBm  Noise level:-79 dBm
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:0 Missed beacon:0

使用DHCP获取IP地址
# dhclient rausb0
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/rausb0/00:19:5b:81:b9:9e
Sending on LPF/rausb0/00:19:5b:81:b9:9e
Sending on Socket/fallback
DHCPDISCOVER on rausb0 to 255.255.255.255 port 67 interval 6
DHCPOFFER from 192.168.0.1
DHCPREQUEST on rausb0 to 255.255.255.255 port 67
DHCPACK from 192.168.0.1
bound to 192.168.0.191 -- renewal in 246 seconds.

如果想开机时就启动无线网络，那么通过修改/etc/network/interfaces文件就能实现，在该文件中增加如下内容：
auto rausb0
iface rausb0 inet dhcp
pre-up ifconfig rausb0 up
pre-up iwconfig rausb0 essid "dd-wrt" key s:*****

上面的essid和key根据自己的具体情况做修改。

http://www.lemote.com/bbs/viewthread.php?tid=6023

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