移植wpa_supplicant工具到arm linux平台

效果

一个脚本

#!/bin/sh
BUILD_HOST=/disk_4/toolchain/gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf
ARM_GCC=${BUILD_HOST}-gcc
BASE=`pwd`
OUTPUT_PATH=${BASE}/install
OPENSSL=openssl-1.0.2t
WPA_SUPPLICANT=wpa_supplicant-0.7.3

make_dirs() {
    cd ${BASE}
    mkdir  compressed  install  source -p
}

tget () { #try wget
    filename=`basename $1`
    echo "Downloading [${filename}]..."
    if [ ! -f ${filename} ];then
        wget $1
    fi

    echo "[OK] Downloaded [${filename}] "
}

download_package () {
    cd ${BASE}/compressed
    #下载包
    tget https://www.openssl.org/source/${OPENSSL}.tar.gz
    tget http://w1.fi/releases/${WPA_SUPPLICANT}.tar.gz
}

tar_package () {
    cd ${BASE}/compressed
    ls * > /tmp/list.txt
    for TAR in `cat /tmp/list.txt`
    do
        tar -xf $TAR -C  ../source
    done
    rm -rf /tmp/list.txt
}

pre_make_ssl () {
    cd ${BASE}/source/${OPENSSL}
    startLine=`sed -n '/install_html_docs\:/=' Makefile`
    echo $startLine
    # 为了避免 多行结果
    for startline in $startLine
    do
        lineAfter=99
        endLine=`expr $startline + 999`
        sed -i $startline','$endLine'd' Makefile
        echo "install_html_docs:" >> Makefile
        echo "\[e-mail] skip by Schips" >> Makefile
        echo "install_docs:" >> Makefile
        echo "\[e-mail] skip by Schips" >> Makefile
        echo "# DO NOT DELETE THIS LINE -- make depend depends on it." >> Makefile
        break
    done
}
pre_make_ssl_rm_char ()
{
 	# 匹配-m64字符串　替换为xx
	#sed -i "s/-m64/xx/g" Makefile
	# 匹配-m64字符串　替换为空
	sed -i "s/-m64//g" Makefile
	sed -i "s/-m32//g" Makefile
}
make_openssl () {
    # 编译安装 ssl
    cd ${BASE}/source/${OPENSSL}
    echo "SSL ABOUT"
    #./Configure --prefix=${OUTPUT_PATH}/${OPENSSL}  os/compiler:${ARM_GCC}
    #pre_make_ssl

	#通过配置生成Makefile文件
	./config no-asm shared --prefix=${OUTPUT_PATH}/${OPENSSL} --cross-compile-prefix=${BUILD_HOST}- #-static
	#删除Makefile文件中-m64编译选项
	pre_make_ssl_rm_char
    make && make install
}


make_wpa () {
    cd ${BASE}/source/wpa*/wpa*
    cp defconfig .config
    echo "CC=${ARM_GCC} -L${OUTPUT_PATH}/${OPENSSL}/lib"  >> .config
    echo "CFLAGS += -I${OUTPUT_PATH}/${OPENSSL}/include"  >> .config
    echo "LIBS += -L${OUTPUT_PATH}/${OPENSSL}/lib" >>  .config
    make && make install DESTDIR=${BASE}/install/wpa_supplicant/
    cp ${BASE}/source/wpa*/wpa*/examples/wpa-psk-tkip.conf ${BASE}/install/wpa_supplicant/wpa.conf
    # 在ctrl_interface 当前行下插入 update_config=1
    sed -i '/ctrl_interface/aupdate_config=1' ${BASE}/install/wpa_supplicant/wpa.conf
}

make_dirs
download_package
tar_package
make_openssl
make_wpa

使用获取ssid

wifi信号名获取

#进行扫描wifi信号
wpa_cli -i wlan0 scan
#将扫描结果给/root/wifilog.txt文件中
wpa_cli scan_result > /root/wifilog.txt

wifilog.txt内容如下：

Selected interface 'wlan0'
bssid / frequency / signal level / flags / ssid
04:d3:b5:71:c8:50       2437    -47     [WPA2-PSK-CCMP][WPS][ESS]       GNNGAP518

#打印 ESS 关键字段所在的行
awk '/ESS/' /root/wifilog.txt

#获取关键字段"ESS"所在行，第5列的字符串
awk '/ESS/ {print $5}' /root/wifilog.txt

#获取关键字段"ESS"所在行，以空格分隔 若第五列内容非空则打印 每行第5列的字符串 保存到/tmp/SSID.txt文件中
awk -F " " '/ESS/ {if($5!=""){print $5}}' /root/wifilog.txt>/tmp/SSID.txt

将awk保存为脚本文件，给外部调用

#!/bin/awk
awk -F " " '/ESS/ {if($5!=""){print $5}}'

简洁运行获取输出到文件

使用

1、etc目录下建立文件

2、生成的sbin目录下的wap_cli … 移动到开发板的/usr/sbin目录下

5、启动服务

wpa_supplicant -i wlan0 -c /etc/wpa_supplicant.conf -B

3、扫描

4、配置好热点信息