用shell脚本实现linux系统上wifi模式（STA和soft AP）的转换

转载请注明出处：http://blog.csdn.net/hellomxj1/

功能：在linux系统上实现wifi STA与AP功能的转换

实现成果：1、加入wifipassword账户add_wifi_account。

2、wifi两种模式启动的脚本wifi_start；

3、帮助信息README_WIFI_START；

详细实现步骤例如以下：

加入wifipassword账户add_wifi_account

  1 #!/bin/sh
  2
  3 echo "Add Wifi Account ..."
  4
  5 if [ ! -e /usr/firmware/wifi/wpa_supplicant.conf]
  6 then
  7     echo "There is not wpa_supplicant.conf!!!"
  8     exit
  9 fi
 10     echo network={ >>/etc/wifi/wpa_supplicant.conf
 11     echo ssid=\"$1\" >>/etc/wifi/wpa_supplicant.conf
 12     echo psk=\"$2\" >>/etc/wifi/wpa_supplicant.conf
 13     echo key_mgmt=$3 >>/etc/wifi/wpa_supplicant.conf
 14     echo } >>/etc/wifi/wpa_supplicant.conf
 15
 16
 17     echo "ssid=\"$1\""
 18     echo "psk=\"$2\""
 19     echo "key_mgmt=$3"
 20
 21
 22 echo "Finshed!"
~                    

该部分主要是实现将账户和password加入到wpa的配置文件。以便于使用sta模式启动能自己主动连接网络。若果该配置文件里有多个账户信息，将会从依次连接，假设当中一个成功。将不会往下运行。

wifi两种模式启动的脚本wifi_start

1 #!/bin/sh
  2
  3 echo "Start wifi ..."
  4
  5 if [ ! -e /var/run/wpa_supplicant]
  6 then
  7 mkdir -p /var/run/wpa_supplicant
  8 fi
  9
 10 busybox ifconfig wlan0 up
 11
 12 ps -fe|grep wpa_supplicant |grep -v grep
 13
 14 if [ $? -ne 0 ]
 15 then
 16 wpa_supplicant -Dnl80211 -iwlan0 -c/etc/wifi/wpa_supplicant.conf&
 17 fi
 18
 19 echo "######$1"
 20
 21 if [ "$1" = "ap" ]
 22 then
 23
 24     echo "Start wifi AP..."
 25
 26     if [ ! $# == 2 ]
 27     then
 28         echo "Please input : start-wifi ap 192.168.1.xx(1-19)"
 29         exit
 30     fi
 31
 32     if [ ! -e /var/lib/misc ]
 33     then
 34     mkdir -p /var/lib/misc
 35     fi
 36
 37     if [ ! -e /var/lib/misc/udhcpd.leases ]
 38     then
 39     touch /var/lib/misc/udhcpd.leases
 40     fi
 41
 42     ifconfig wlan0 down
 43
 44     result=`cat /sys/module/bcmdhd/parameters/firmware_path`
 45
 46     if [ "$result" != "/usr/firmware/wifi/fw_43341_apsta.bin" ]
 47     then
 48     echo "/usr/firmware/wifi/fw_43341_apsta.bin">/sys/module/bcmdhd/parameters/firmware_path
 49     fi
 50
 51     ifconfig wlan0 $2 up
 52
 53     echo "Start hostapd ..."
 54
 55     ps -fe|grep hostapd |grep -v grep
 56
 57     if [ $? -eq 0 ]
 58     then
 59         ps -ef | grep hostapd | grep -v grep | awk '{print $1}' | sed -e "s/^/kill -9 /g" | sh -
 60     fi
 61
 62     hostapd /etc/wifi/hostapd.conf&
 63
 64     echo "Start udhcpd ..."
 65
 66     ps -fe|grep udhcpd |grep -v grep
 67
 68     if [ $? -eq 0 ]
 69     then
 70         ps -ef | grep udhcpd | grep -v grep | awk '{print $1}' | sed -e "s/^/kill -9 /g" | sh -
 71     fi
 72
 73     udhcpd -fS /etc/udhcpd.conf&
 74
 75     echo "Wifi AP finshed!"
 76
 77 elif [ "$1" = "sta" ]
 78 then
 79     ifconfig wlan0 down
 80
 81     result=`cat /sys/module/bcmdhd/parameters/firmware_path`
 82
 83     if [ "$result" != "/usr/firmware/wifi/fw_43341.bin" ]
 84     then
 85     echo "/usr/firmware/wifi/fw_43341.bin">/sys/module/bcmdhd/parameters/firmware_path
 86     fi
 87
 88     ifconfig wlan0 up
 89
 90     udhcpc -i wlan0
 91
 92 else
 93
 94     echo "Error!! Please input again!"
 95
 96 fi

这里主要分为两个模块，一个是sta模式的启动直接输入./wifi_start sta;就可以启动。还有一个为soft AP模式直接输入：./wifi_start ap 192.168.2.10;就可以进入soft AP模式，考虑到两种模式的不断转换的问题，我在执行的前期会对进程进行检查。将曾经开启的进程进行关闭，一边本次开启可以正常执行。

帮助信息README_WIFI_START

  1 <1>Introduction
  2
  3     This document describes how to start wifi,and introduces the function and use methods of add-wifi-account and wifi-start;And add-        wifi-account and wifi-start in the "/etc/init.d" directory.
  4
  5 <2>How to operate
  6
  7 First,Add the available WiFi account
  8
  9     #/etc/init.d/add-wifi-account "JZ_Guest" "#wwwingenic*" "WPA-PSK"
 10
 11     Notes: "JZ_Guest" is the ssid of the network that you want to connect;
 12            "#wwwingenic* is the password of the network;
 13            " WPA-PSK"  is the encryption method of the network;
 14
 15 Second,Start wifi
 16
 17     /*Start wifi with STA model*/
 18
 19     #/etc/init.d/wifi-start sta
 20
 21     /*Start wifi with AP model*/
 22
 23     #/etc/init.d/wifi-start ap 192.168.1.10
 24
 25     Notes: 192.168.1.10 is ip of newton,you can use ip address from 192.168.1.1 <----> 192.168.1.19

这里主要是我的脚本的使用说明。方便使用；

时间比較紧。功能的实现可能会有问题，希望能给大家多多给出建议。