hostapd阅读（openwrt）-1

　　好久没有来博客园写点东西了，这段时间主要搞了openwrt系统的移植，无线的校验等相关工作，鉴于我是一个懒惰的大龄菜鸟程序员，就先自我原谅自己了，好了废话少说，直奔主题--hostapd。

　　由于我主要从事OP的相关开发，故我们先来了解hostapd, hostapd-full, wpad, wpad-mini, supplicant等等，hostapd按照官方的说法是：“用户层无线接入管理守护程序：包括IEEE 802.1X/WPA/EAP认证器，RADIUS client, EAP server, and RADIUS authentication server，它目前主要支持基于HostAP，prism54, madwifi, mac80211的无线驱动框架”。hostadp-full通过编译时选择更多的组件(参考full-mini.patch文件)，wpad是基于hostapd的编译移植版本。

--- files/hostapd-full.config   -- ::21.708727013 +
+++ files/hostapd-mini.config   -- ::21.708727013 +
@@ -, +, @@
 #CONFIG_DRIVER_NONE=y

 # IEEE 802.11F/IAPP
-CONFIG_IAPP=y
+# CONFIG_IAPP=y

 # WPA2/IEEE .11i RSN pre-authentication
 CONFIG_RSN_PREAUTH=y
@@ -, +, @@
 #CONFIG_IEEE80211W=y

 # Integrated EAP server
-CONFIG_EAP=y
+#CONFIG_EAP=y

 # EAP-MD5 for the integrated EAP server
-CONFIG_EAP_MD5=y
+#CONFIG_EAP_MD5=y

 # EAP-TLS for the integrated EAP server
-CONFIG_EAP_TLS=y
+#CONFIG_EAP_TLS=y

 # EAP-MSCHAPv2 for the integrated EAP server
-CONFIG_EAP_MSCHAPV2=y
+#CONFIG_EAP_MSCHAPV2=y

 # EAP-PEAP for the integrated EAP server
-CONFIG_EAP_PEAP=y
+#CONFIG_EAP_PEAP=y

 # EAP-GTC for the integrated EAP server
-CONFIG_EAP_GTC=y
+#CONFIG_EAP_GTC=y

 # EAP-TTLS for the integrated EAP server
-CONFIG_EAP_TTLS=y
+#CONFIG_EAP_TTLS=y

 # EAP-SIM for the integrated EAP server
 #CONFIG_EAP_SIM=y
@@ -, +, @@
 #CONFIG_EAP_FAST=y
 # Wi-Fi Protected Setup (WPS)
-CONFIG_WPS=y
-CONFIG_WPS2=y
+#CONFIG_WPS=y
 # Enable UPnP support for external WPS Registrars
 #CONFIG_WPS_UPNP=y

@@ -, +, @@

 # PKCS# (PFX) support (used to read private key and certificate file from
 # a file that usually has extension .p12 or .pfx)
-CONFIG_PKCS12=y
+#CONFIG_PKCS12=y

 # RADIUS authentication server. This provides access to the integrated EAP
 # server from external hosts using RADIUS.
 #CONFIG_RADIUS_SERVER=y

 # Build IPv6 support for RADIUS operations
-CONFIG_IPV6=y
+#CONFIG_IPV6=y

 # IEEE Std .11r- (Fast BSS Transition)
-CONFIG_IEEE80211R=y
+#CONFIG_IEEE80211R=y

 # Use the hostapd's IEEE 802.11 authentication (ACL), but without
 # the IEEE 802.11 Management capability (e.g. FreeBSD/net80211)
@@ -, +, @@
 #CONFIG_NO_STDOUT_DEBUG=y

 # Remove support for RADIUS accounting
-#CONFIG_NO_ACCOUNTING=y
+CONFIG_NO_ACCOUNTING=y

 # Remove support for RADIUS
-#CONFIG_NO_RADIUS=y
+CONFIG_NO_RADIUS=y

 # Remove support for VLANs
 #CONFIG_NO_VLAN=y

 CONFIG_TLS=internal
-CONFIG_INTERNAL_LIBTOMMATH=y
-CONFIG_INTERNAL_AES=y
-NEED_AES_DEC=y
 CONFIG_NO_RANDOM_POOL=y
 CONFIG_NO_DUMP_STATE=y

-CONFIG_WPS=y
-CONFIG_FULL_DYNAMIC_VLAN=y
-
 CONFIG_UBUS=y

　　hostapd的配置相关说明可以参考：http://linuxwireless.org/en/users/Documentation/hostapd/ 说到底hostapd可以说是一个交互中介，用于通过nl80211用户与驱动子层（cfg80211与mac80211）进行交互管理。

　　好了，关于hostapd就说到这里面吧，源码下载地址：http://w1.fi/hostapd/ , 我们要想分析好hostapd源码，我们首先需要对hostapd的源码树与数据结构进行熟悉：

　　源码树：http://w1.fi/wpa_supplicant/devel/code_structure.html,数据结构：http://w1.fi/wpa_supplicant/devel/annotated.html，好了，下一篇博客将详细说明几个重要的源码文件与数据结构。