Linux下软AP功能之Hostapd介绍

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Hostapd简介： 简单说，hostapd能够使得无线网卡切换为master模式，模拟AP(通常可以认为是路由器)功能，也就是我们说的软AP(Soft AP)。 Hostapd的功能就是作为AP的认证服务器，负责控制管理stations(通常可以认为带无线网卡的PC)的接入和认证。 通过Hostapd可以将无线网卡切换为AP/Master模式，通过修改配置文件，可以建立一个开放式的(不加密)的，WEP，WPA或WPA2的无线网络。并且通过修改配置文件可以设置无线网卡的各种参数，包括频率，信号，beacon包时间间隔，是否发送beacon包，如果响应探针请求等等。还可以设置mac地址过滤条件等。具体可以参考它的配置文件说明。 下面就从官网上摘下的部分原因及翻译。翻译的不好请见谅。 hostapd is an IEEE 802.11 AP and IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator. Hostapd是IEEE 802.11 AP and IEEE 802.1X/WPA/WPA2/EAP/RADIUS的认证器     hostapd is a user space daemon for access point and authentication servers. It implements IEEE 802.11 access point management, IEEE 802.1X/WPA/WPA2/EAP Authenticators, RADIUS client, EAP server, and RADIUS authentication server. The current version supports Linux (Host AP, madwifi, mac80211-based drivers) and FreeBSD (net80211). Hostapd是一个访问点以及认证服务器的运行于用户空间的守护程序。它实现了IEEE 802.11接入带你(Access Point)的管理功能，是IEEE 802.1X/WPA/WPA2/EAP的认证器,是 RADIUS client, EAP server, and RADIUS认证服务器。当前版本的hostapd支持linux上Host AP，madwifi和基于mac80211协议栈的驱动程序，以及FreeBSD上net80211协议栈的驱动程序。 hostapd is designed to be a "daemon" program that runs in the background and acts as the backend component controlling authentication. hostapd supports separate frontend programs and an example text-based frontend, hostapd_cli, is included with hostapd. Hostapd是一个后台守护进程，作为后台组件来控制和管理认证功能。Hostapd支持多个前台程序。hostapd_cli，就是一个跟hostapd一起的命令行前台程序。 支持特性 Supported WPA/IEEE 802.11i/EAP/IEEE 802.1X features 支持WPA/IEEE 802.11i/EAP/IEEE 802.1X WPA-PSK ("WPA-Personal") WPA with EAP (with integrated EAP server or an external RADIUS backend authentication server) ("WPA-Enterprise") key management for CCMP, TKIP, WEP104, WEP40 WPA and full IEEE 802.11i/RSN/WPA2 RSN: PMKSA caching, pre-authentication IEEE 802.11r IEEE 802.11w RADIUS accounting RADIUS authentication server with EAP Wi-Fi Protected Setup (WPS) Supported EAP methods (integrated EAP server and RADIUS authentication server) EAP-TLS EAP-PEAP/MSCHAPv2 (both PEAPv0 and PEAPv1) EAP-PEAP/TLS (both PEAPv0 and PEAPv1) EAP-PEAP/GTC (both PEAPv0 and PEAPv1) EAP-PEAP/MD5-Challenge (both PEAPv0 and PEAPv1) EAP-TTLS/EAP-MD5-Challenge EAP-TTLS/EAP-GTC EAP-TTLS/EAP-MSCHAPv2 EAP-TTLS/MSCHAPv2 EAP-TTLS/EAP-TLS EAP-TTLS/MSCHAP EAP-TTLS/PAP EAP-TTLS/CHAP EAP-SIM EAP-AKA EAP-AKA' EAP-PAX EAP-PSK EAP-SAKE EAP-FAST EAP-IKEv2 EAP-GPSK Following methods are also supported, but since they do not generate keying material, they cannot be used with WPA or IEEE 802.1X WEP keying. 同样支持下面的这些功能，但是这些不生成建钥资料，所以它们不能够WPA 或者 IEEE 802.1X WEP一同使用 EAP-MD5-Challenge EAP-MSCHAPv2 EAP-GTC EAP-TNC (Trusted Network Connect; TNCS, IF-IMV, IF-T, IF-TNCCS) 支持的无线网卡/驱动 Linux mac80211 drivers Host AP driver for Prism2/2.5/3 madwifi (Atheros ar521x) BSD net80211 layer (e.g., Atheros driver) (FreeBSD 6-CURRENT) 如何确定一款无线网卡是否能被hostpad支持 以ubuntu10.04为例 执行sudo aptitude install iw，安装无线配置工具iw 执行iw list，如果在下面的结果中出现AP字样，那么就表示这款网卡支持hostapd Supported interface modes: * IBSS * managed * AP * AP/VLAN * WDS * monitor * mesh point 推荐网址 http://hostap.epitest.fi/hostapd/ http://wireless.kernel.org/en/users/Documentation/hostapd https://help.ubuntu.com/community/WifiDocs/MasterMode http://hostap.epitest.fi/gitweb/gitweb.cgi?p=hostap.git;a=blob_plain;f=hostapd/hostapd.conf