Android:使用wpa_supplicant和dhcpd簡單測試wifi

原文： http://blog.csdn.net/laojing123/article/details/7719132  

 Android系統中對于WIFI的設定內建到了“設定”中，其實跟手動設定差不多。這裡介紹下如何手動連接配接WIFI，以友善以後調試WIFI。

        第一步要做的就是要加載WIFI子產品驅動了。當然如果你的WIFI是編譯到核心裡面的，就不需要的。我們的WIFI晶片用的是BCM4330，編譯為子產品。

insmod /system/lib/modules/kernel/drivers/net/wireless/bcm4330/bcm4330.ko firmware_path=/system/vendor/firmware/bcm4330.bin \ nvram_path=/system/vendor/firmware/nvram.txt

       這樣驅動子產品加載後，需要啟動wpa_supplicant

[email protected]:/ # wpa_supplicant -Dwext -iwlan0 -C/data/system/wpa_supplicant -c/data/misc/wifi/wpa_supplicant.conf &  

然後ps|grep wpa看看有沒有起來，在wifi工作過程中，這個程序要始終都在的。

        接着啟動用戶端wpa_cli進行配置并連接配接wifi熱點

130|[email protected]:/ # wpa_cli -p/data/system/wpa_supplicant -iwlan0

wpa_cli v0.8.x

Copyright (c) 2004-2011, Jouni Malinen <[email protected]> and contributors

This program is free software. You can distribute it and/or modify it

under the terms of the GNU General Public License version 2.

Alternatively, this software may be distributed under the terms of the

BSD license. See README and COPYING for more details.

Interactive mode

> 

其中/data/system/wpa_supplicant 是剛剛啟動wpa_supplicant的時候建立的一個套接字

接着進行搜尋wifi

> scan

OK

<3>CTRL-EVENT-SCAN-RESULTS 

檢視搜到的有哪些熱點

> scan_result

bssid / frequency / signal level / flags / ssid

40:16:9f:67:0f:00       2462    -42     [WPA-PSK-TKIP+CCMP][WPA2-PSK-TKIP+CCMP][WPS][ESS]       HHCN-NET

b0:48:7a:49:44:68       2437    -58     [WPA2-PSK-CCMP][WPS][ESS]       HHTech.Arch

e0:05:c5:97:d8:5a       2412    -71     [WPA-PSK-CCMP][WPA2-PSK-CCMP-preauth][ESS]      1103-5

40:16:9f:67:0c:a6       2412    -74     [WPA-PSK-TKIP+CCMP][WPA2-PSK-TKIP+CCMP][WPS][ESS]       hardware

b0:48:7a:49:65:54       2437    -58     [WPA-PSK-CCMP][WPA2-PSK-CCMP][WPS][ESS] Dept_driver

接着設定wifi，就連接配接Dept_driver這個熱點吧

> add_net

3

> set_net 3 ssid "Dept_driver"

OK

Dept_driver的加密方式是WPA2-PSK

> set_net 3 psk "password"

OK

> select_net 3

OK

<3>CTRL-EVENT-STATE-CHANGE id=0 state=0 BSSID=00:00:00:00:0[ 2752.332061] dhd_aoe_hostip_clr failed code -23

0:00

<3>CTR[ 2752.337768] dhd_aoe_arp_clr failed code 1

L-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:00:00:00:00:00

<3>CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=0

<3>CTRL-EVENT-STATE-CHANGE id=-1 state=0 BSSID=00:00:00:00:00:00

<3>CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:00:00:00:00:00

<3>CTRL-EVENT-SCAN-RESULTS 

<3>WPS-AP-AVAILABLE 

<3>Trying to associate with b0:48:7a:49:65:54 (SSID='Dept_driver' freq=2437 MHz)

<3>CTRL-EVENT-STATE-CHANGE id=-1 state=5 BSSID=b0:48:7a:49:65:54

[ 2753.153717] wl_iw_set_essid: join SSID=Dept_driver ch=6

<3>CTRL-EVENT-STATE-CHANGE id=3 state=6 BSSID=b0:48:7a:49:65:54

<3>Associated with b0:48:7a:49:65:54

<3>CTRL-EVENT-STATE-CHANGE id=3 state=7 BSSID=00:00:00:00:00:00

<3>CTRL-EVENT-STATE-CHANGE id=3 state=8 BSSID=00:00:00:00:00:00

<3>WPA: Key negotiation completed with b0:48:7a:49:65:54 [PTK=CCMP GTK=CCMP]

<3>CTRL-EVENT-CONNECTED - Connection to b0:48:7a:49:65:54 completed (reauth) [id=3 id_str=]

<3>CTRL-EVENT-STATE-CHANGE id=3 state=9 BSSID=00:00:00:00:00:00

> enable_net 3

OK

> q

這樣，就都設定好了，接着用dhcpd配置設定一個IP位址

[email protected]:/ # dhcpcd wlan0                                                  

dhcpcd[3940]: version 5.2.10 starting

dhcpcd[3940]: host does not support a monotonic clock - timing can skew

dhcpcd[3940]: wlan0: rebinding lease of 192.168.1.216

dhcpcd[3940]: wlan0: acknowledged 192.168.1.216 from 192.168.1.1 `�'

dhcpcd[3940]: wlan0: leased 192.168.1.216 for 7200 seconds

dhcpcd[3940]: forked to background, child pid 3971

[email protected]:/ # busybox ifconfig wlan0                                        

wlan0     Link encap:Ethernet  HWaddr AC:E8:7B:89:D3:C0  

          inet addr:192.168.1.216  Bcast:255.255.255.255  Mask:255.255.255.0

          inet6 addr: fe80::aee8:7bff:fe89:d3c0/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:6637 errors:0 dropped:25 overruns:0 frame:0

          TX packets:4357 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 

          RX bytes:3825961 (3.6 MiB)  TX bytes:704832 (688.3 KiB)

這樣就完成了。可以上網了。