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、添加wifi密码账户add_wifi_account；

   
      2、wifi两种模式启动的脚本wifi_start；

             3、帮助信息README_WIFI_START；

具体实现过程如下：

添加wifi密码账户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密码添加到wpa的配置文件，以便于使用sta模式启动能自动连接网络，若果该配置文件中有多个账户信息，将会从依次连接，如果其中一个成功，将不会往下执行。

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;即可启动，另一个为soft AP模式直接输入：./wifi_start ap 192.168.2.10;即可进入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，将以前开启的进程进行关闭，一边本次开启能够正常运行；

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；

时间比较紧，功能的实现可能会有问题，希望能给大家多多给出建议。