Wireless WiFi驱动及工具

Hardware Interfaces: USB, SDIO, PCMCIA, PCI....

Drivers Hierarchy:

Wireless Extension: to patch kernel

Woreless Tools: to generate the
              tools like iwconfig iwevent iwgetid iwlist iwspy iwpriv
              library libiw.so.xx

Configurations:
        ifconfig wlan0 down;
        ifconfig wlan0 192.168.1.23
        iwconfig wlan0 essid linksys     // the same as AP's ssid
        iwconfig wlan0 mode Manager      // i.e. iw_mode=2, the channel should be also same as AP's and can be set via iwconfig wlan0 channel channel_No
        iwconfig
        Ping AP: ping 192.168.1.44
        surfe on the web:
              route add default gw 192.168.1.1
              append the DNS resolve: vi /tmp/var/tmp/resolv.conf and add nameserver like 'nameserver xxxxxx'
             
wpa_supplicant:
        cross-compiling the wpa_supplicant package to generate the binary command: wpa_supplicant, wpa_cli. wpa_supplicant acts as server and wpa_cli as client to searching,setting and connecting network.
        In most cases, if wpa_supplicant.conf is ok, wpa_supplicant will establish the connection with network.

wpa_supplicant.conf:
        可有可无，没有的话无法用wpa_cli terminate来关闭wpa_supplicant
ctrl_interface=/var/run/wpa_supplicant

# 确保只有root用户能读取WPA的配置，可有可无，尤其是在嵌入式设备上
ctrl_interface_group=0

# 使用wpa_supplicant来扫描和选择AP，也可以设置成0或2，但只有1才能正确工作
ap_scan=1

network={
#AP的名字
ssid="my_network"
#AP的key
psk="my_key"
}

edit /etc/network/interface
xxxxxx

        Then, It is OK!


Some useful information and tools on WiFi:
1.     Airopeek: wireless network sniffer tools with hack functionalities
       : 伙聚WiFi无线联盟

2. a、安装wpa_supplicant　　apt-get install wpasupplicant

　 b、创建/etc/wpa_supplicant.conf包含以下内容：

　　network={

　　ssid="你的无线网ssid"

　　psk="你的wpa口令"

　　key_mgmt=WPA-PSK

　　proto=WPA

　　pairwise=TKIP

　　}

　　c、编辑/etc/network/interfaces

　　iface eth1 inet dhcp

　　pre-up wpa_supplicant -Bw -Dwext -ieth1 -c/etc/wpa_supplicant.conf

　　post-down killall -q wpa_supplicant

　　注：eth1是你的，并且假设你使用dhcp协议。

　　d、启动你的网卡

　　ifup eth1

　　如果有必要请关闭你的有线网络（ifdown eth0），防止路由问题。

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