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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。