原文请见：

http://blog.163.com/wxiongn@126/blog/static/11788203820102262748358/

wpa_supplicant无线网络配置  

2010-04-06 13:06:33|  分类： 默认分类|字号 订阅     目前可以使用wireless-tools 或wpa_supplicant工具来配置无线网络。请记住重要的一点是，对无线网络的配置是全局性的，而非针对具体的接口。      wpa_supplicant是一个较好的选择，但缺点是它不支持所有的驱动。请浏览wpa_supplicant网站获得它所支持的驱动列表。另外，wpa_supplicant目前只能连接到那些你已经配置好ESSID的无线网络。wireless-tools支持几乎所有的无线网卡和驱动，但它不能连接到那些只支持WPA的AP。     经过编译后的wpa_supplicant源程序可以看到两个主要的可执行工具：wpa_supplicant和wpa_cli。wpa_supplicant是核心程序，它和wpa_cli的关系就是服务和客户端的关系：后台运行wpa_supplicant，使用wpa_cli来搜索、设置、和连接网络。        如何用wpa_supplicant使能一个wifi连接？ Step by step： 1、运行wpa_supplicant程序； 执行：/system/bin/wpa_supplicant -d -Dwext -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf 其中： -d ：增加调试信息 -Dwext ：wext，驱动名称 -iwlan0 ：wlan0，网络接口名称 /system/bin/wpa_supplicant ：wpa_supplicant可执行程序path /data/misc/wifi/wpa_supplicant.conf ：wpa_supplicant的配置文件path 2、运行命令行工具wpa_cli ； 执行 ：wpa_cli -iwlan0 -p/data/system/wpa_supplicant 注，-p/data/system/wpa_supplicant中的wpa_supplicant并不是可执行程序，而是个控制套接字。 此时会进入交互模式。其中交互模式的命令如下表：   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 next section for a list of parameters save_config save_c saves the configuration
  设置网络的基本格式：set_network [] 显示网络信息的基本格式：get_network 相应的参数如下表： Key Description Parameters ssid Access point name string id_str String identifying the network string priority Connection priority over other APs number (0 being the default low priority) bssid Mac address of the access point mac address scan_ssid Enable/disbale ssid scan 0, 1, 2 key_mgmt Type of key management WPA-PSK, WPA_EAP, None pairwise Pairwise ciphers for WPA CCMP, TKIP group=TKIP Group ciphers for WPA CCMP, TKIP, WEP104, WEP40 psk Pre-Shared Key (clear or encrypted) string wep_key0 WEP key (up to 4: wep_key[0123]) string eap Extensible Authentication Protocol MD5, MSCHAPV2, OTP, GTC, TLS, PEAP, TTLS identity EAP identity string string password EAP password string ca_cert Pathname to CA certificate file /full/path/to/certificate client_cert Pathname to client certificate /full/path/to/certificate (PEM/DER) private_key Pathname to a client private key file /full/path/to/private_key (PEM/DER/PFX)     eg.1、连接无加密的AP >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 eg.2、连接WEP加密AP >add_network   (assume return 1) >set_network 1 ssid "666" >set_network 1 key_mgmt NONE >set_network 1 wep_key0 "your ap password" >enable_network 1 eg.3、连接WPA-PSK/WPA2-PSK加密的AP >add_network   (assume return 2) >set_network 2 ssid "666" >set_network 2 psk "your pre-shared key" >enable_network 2 到此，wifi模块就能连接上AP了。 3、以上是通过命令行工具wpa_cli来实现wifi网络的连接。当然，也可以通过wpa_supplicant的配置文件来实现连接。 再回顾下运行wpa_supplicant时执行的命令： /system/bin/wpa_supplicant -d -Dwext -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf 我们在执行时加上了-c/data/misc/wifi/wpa_supplicant.conf，我们可以将我们要连接的AP的设置以一定的格式写入wpa_supplicant.conf配置文件中即可。 eg.  ctrl_interface=DIR=/data/system/wpa_supplicant GROUP=system update_config=1 network={ ssid="my access point" proto=WPA key_mgmt=WPA-PSK psk="you pass words" } 具体格式可参考：http://hostap.epitest.fi/gitweb/gitweb.cgi?p=hostap.git;a=blob_plain;f=wpa_supplicant/wpa_supplicant.conf