Reference site:
http://www./simple/index.php?t20393.html

Cross compile wpa_supplicant

1.移植準(zhǔn)備
a. 下載 openssl源代碼 (使用openssl-0.9.8e ) 官網(wǎng)： http://www./source/ 源碼：http://www./source/openssl-0.9.8e.tar.gz
b. 下載 wpa_supplicant源代碼 (使用wpa_supplicant-0.7.3 ) 官網(wǎng)：http://hostap./wpa_supplicant/ 源碼：http://hostap./releases/wpa_supplicant-0.7.3.tar.gz c: 下載：libtommath源代碼(libtommath_0.39.orig.tar.gz) 源碼：ftp://220.165.12.10/debian/pool/main/libt/libtommath/libtommath_0.39.orig.tar.gz

2. 編譯openssl
a.將openssl解到 wpa_supplicant/patches 目錄下 # tar zxvf openssl-0.9.8e.tar.gz -C ../ wpa_supplicant-0.7.3/patches/

b.將openssl-0.9.8-tls-extensions.patch拷貝到 wpa_supplicant/patches/openssl-0.9.8e 目錄下

1. cp wpa_supplicant-0.7.3/patches/openssl-0.9.8e-tls-extensions.patch openssl-0.9.8e/

c.patch openssl-0.9.8e # patch -p1 < openssl-0.9.8e-tls-extensions.patch

d. 編譯openssl
方式1.

1. ./Configure linux-elf-arm -DB_ENDIAN linux:' arm-linux-gcc' shared --prefix=/usr/local/openssl
2. make CC=arm-linux-gcc install >>產(chǎn)生 libssl.a 及l(fā)ibcrypto.a

方式2.

1. ./Configure no-asm --prefix=/usr/local/openssl
2. make CC=arm-linux-gcc install >>產(chǎn)生 libssl.so及l(fā)ibcrypto.so

3.編譯libtommath-0.39
a.將libtommath-0.39解到/usr/src/ 目錄下 # tar zxvf libtommath_0.39.orig.tar.gz -C /usr/src
b.編譯libtommath # make CC=arm-linux-gcc 產(chǎn)生libtommath.a (Add "CC=/home/fedora/.exdisk/FtenSVN/AU1330/13pf/rma1/arm/toolchains/arm-2010q1/bin/arm-none-linux-gnueabi-gcc" into makefile)

4. 編譯wpa_supplicant(增加WPS功能)
#cp defconfig .config
CONFIG_DRIVER_WEXT=y
CONFIG_IEEE8021X_EAPOL=y
CONFIG_EAP_FAST=y
CONFIG_TLS=openssl
CONFIG_TLS=internal
CONFIG_INTERNAL_LIBTOMMATH=y
ifndef CONFIG_INTERNAL_LIBTOMMATH
LTM_PATH=/usr/src/libtommath-0.39
CFLAGS += -I$(LTM_PATH)
LIBS += -L$(LTM_PATH)
LIBS_p += -L$(LTM_PATH) endif
CONFIG_WPS=y
CONFIG_EAP_WPS=y
#vim makefile
CC= gcc -L/usr/local/ssl/lib/
CFLAGS += -I/usr/local/ssl/include/
LIBS += -L/usr/local/ssl/lib/
#make CC=arm-linux-gcc install

---

Start wpa_supplicant service in Linux

Copy "wpa_cli" "wpa_supplicant" "wpa_passphrase" into the device under /usr/bin Copy configuration files into /root/wifi (can be any dir)
Before calling "wpa_cli", "wpa_supplicant" service need to be up

Configuration file for wpa_supplicant service

---

1. WPA-PSK/TKIP

ctrl_interface=/var/run/wpa_supplicant

---

"wpa_supplicant -B -Dwext -iwlan0 -c/root/wifi/wpa_supplicant.conf" to start the service
ioctl[SIOCSIWESSID]: Input/output error
ioctl[SIOCSIWENCODEEXT]: Input/output error
Input/output error can be ignored. wpa_supplicant service is in process now
Could not connect to wpa_supplicant - re-trying

---

Connect AP using "wpa_cli"

Input "wpa_cli" to access interactive mode:
To press WPS button on the device
>wps_pbc
After issue above, press the button on the AP, authentication can be granted.

To generate a PIN code on device side
>wps_pin <MAC of the device>
Input the generated PIN code in AP configuration console to authenticate the connection request

To use the PIN code on the AP
>wps_pin <MAC of the device> 12345670
Manualy input 12345670 into the configuration web console of the AP (As to authenticate the request)
After that connection between AP and the device can be established.
"udhcpc -i wlan0 -n" to retrieve the IP from AP