wpa_cli與wpa_supplicant的交互命令
1）通過adb命令行，可以直接打開supplicant，從而運行wpa_cli，可以解決客戶沒有顯示屏而無法操作WIFI的問題，還可以避免UI的問題帶到driver。進一步來說，可以用在很多沒有鍵盤輸入和LCD輸出的安卓終端產品的操作上。
wpa_supplicant包含兩個主要的可執行工具：wpa_supplicant和wpa_cli。wpa_supplicant是核心程序，它和wpa_cli的關系就是服務和客戶端的關系：后臺運行wpa_supplicant，使用wpa_cli來搜索、設置、和連接網絡。
（2）在wpa_cli交互模式下可以執行很多命令，列表如下：
Full command
Short command
Description
status
stat
displays the current connection status
disconnect
disc
prevents wpa_supplicant from connecting to any access point
quit
q
exits wpa_cli
terminate
term
kills wpa_supplicant
reconfigure
recon
reloads wpa_supplicant with the configuration file supplied (-c parameter)
scan
scan
scans for available access points (only scans it, doesn‘t display anything)
scan_result
scan_r
displays the results of the last scan
list_networks
list_n
displays a list of configured networks and their status (active or not, enabled or disabled)
select_network
select_n
select a network among those defined to initiate a connection (ie select_network 0)
enable_network
enable_n
makes a configured network available for selection (ie enable_network 0)
disable_network
disable_n
makes a configured network unavailable for selection (ie disable_network 0)
remove_network
remove_n
removes a network and its configuration from the list (ie remove_network 0)
add_network
add_n
adds a new network to the list. Its id will be created automatically
set_network
set_n
shows a very short list of available options to configure a network when supplied with no parameters.
See next section for a list of extremely useful parameters to be used with set_network and get_network.
get_network
get_n
displays the required parameter for the specified network. See nextsection for a list of parameters
save_config
save_c
saves the configuration
（3）平臺操作實例（僅限于MTK平臺 且具ROOT權限）
A，首先保證ADB連入，且能運行adb remount，這樣避免系統文件只讀。然后設置wpa_cli和wpa_supplicant有較強權限。
B，運行echo 1 > /dev/wmtWifi，啟動WIFI驅動。但是這個使能不會表現在安卓界面上層，默認是要在啟動安卓時開啟WIFI模塊的，也即設置中的WIFI要默認ON。
C，進入/system/bin目錄，首先運行服務端wpa_supplicant。
./wpa_supplicant -iwlan0 -Dnl80211 -c/system/etc/wifi/wpa_supplicant.conf
正常啟動后的回顯如下：
不可收入態表明該服務端已經在運行了（也可能是可輸入狀態，只要后面的wpa_cali可連接就行）。-i -D -c的參數意義可直接在Help中查詢，具體有些參數可能因平臺不同而有差異。
D，另開啟一個ADB SHELL，作客戶端運行wpa_cali。如下：
cd /system/bin
wpa_cli -p /data/misc/wpa_supplicant
回顯如下說明正常并處于交互模式：
E，執行一系列命令看看
scan
scan_results
F，連WIFI的命令行，有以下幾種：
for AP that doesn`t have encryption
>add_network (It will display a network id for you, assume it returns 0)
>set_network 0 ssid “666”
>set_network 0 key_mgmt NONE
>enable_network 0
>quit
for AP that has WEP
>add_network (assume returns 1)
>set_network 1 ssid “666”
>set_network 1 key_mgmt NONE
>set_network 1 wep_key0 “your ap passwork”(if usting ASCII, it need
double quotation marks, if using hex, then don`t need the double quotation
marks)
>set_network 1 wep_tx_keyidx 0
>select_network 1 (optional, remember, if you are connecting with another
AP, you should select it to disable the another)
>enable_network 1
for AP that has WPA-PSK/WPA2-PSK
>add_network (assume returns 2)
>set_network 2 ssid “666”
>set_network 2 psk “your pre-shared key”
>select_network 2 (optional, remember, if you are connecting with another
AP, you should select it to disable the another)
>enable_network 2
我自己的實驗圖如下：
以上過程就說明聯網OK，可以上網了。
參考原文：http://cache.baiducontent.com/c?m=9f65cb4a8c8507ed4fece7631046893b4c4380146d96864968d4e414c42246100024b8ed7a66471980853a3c50f11e41bca770216c5d61aa9bc98b4addb9922b3bcd7a742613d51742c419de8a1c729f7e875a98ea42b3e1&p=8b2a975bcd8711a052eedb2f4a4c&newp=8b2a971f81822dec08e29e7d495d92695c02dc3051dcd14f2895ff0b&user=baidu&fm=sc&query=adb+shell+wifi&qid=&p1=4
參考原文：http://blog.sina.com.cn/s/blog_55465b470100l73l.html
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