Scallions
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pi-net-ap

发表于

树莓派自动连接校园网并开启wifi

参考代码

连接校园网

准备工作

  1. 打开校园网界面
  2. 打开开发者工具，进行抓包
  3. 找到校园网登录的包，得到关键数据

编写Python脚本

  1. 利用request库构建请求，代入找包得到的数据
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       def login():
    url = "http://172.19.1.9:8080/eportal/InterFace.do?method=login"

    headers = {
    	'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    	'Origin': 'http://172.19.1.9:8080',
    	'Referer': 'http://172.19.1.9:8080/eportal/index.jsp?wlanuserip=a1ea6bfa0d6e6eefa185548d2eccb994&wlanacname=29185648f4390d7911ef4b72391e17a9&ssid=&nasip=07e38f2323f330cd5ffcc3a203a63100&snmpagentip=&mac=fadf15c8d0df3a45ee61813a79609e5c&t=wireless-v2&url=096e8e7059e430e024191585b02b6dc9b7b80d56d3cad4404b0c90f7e44fbab3&apmac=&nasid=29185648f4390d7911ef4b72391e17a9&vid=acf5e31dcc166138&port=e65ae3d6b3555e50&nasportid=ac41d60d7f1382081362a1ed29e6af272c4a438e3140152c0358914a2f2ac8c82054d7eb5505b59d',
    	'Save-Data': 'on',
    	'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36',
       }

    user = '2015*********'
    pwd = '******'

    data = 'userId='+user+'&password='+pwd+'&service=Internet&queryString=wlanuserip%253Da1ea6bfa0d6e6eefa185548d2eccb994%2526wlanacname%253D29185648f4390d7911ef4b72391e17a9%2526ssid%253D%2526nasip%253D07e38f2323f330cd5ffcc3a203a63100%2526snmpagentip%253D%2526mac%253Dfadf15c8d0df3a45ee61813a79609e5c%2526t%253Dwireless-v2%2526url%253D096e8e7059e430e024191585b02b6dc9b7b80d56d3cad4404b0c90f7e44fbab3%2526apmac%253D%2526nasid%253D29185648f4390d7911ef4b72391e17a9%2526vid%253Dacf5e31dcc166138%2526port%253De65ae3d6b3555e50%2526nasportid%253Dac41d60d7f1382081362a1ed29e6af272c4a438e3140152c0358914a2f2ac8c82054d7eb5505b59d&operatorPwd=&operatorUserId=&validcode=&passwordEncrypt=false'


    r = requests.post(url,headers=headers,data=data).json()

    #print(r['result'])

    # 判断当前是否已在线
    if r['result']=='success':
    	return 1
    else:
    	return 0
  2. 利用os库和ping工具检测是否连上网
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    import os

    def isNetOK(testserver="baidu.com"):
        return os.system("ping " + testserver+" -c 2 -W 1 > /dev/null")

  3. 构造loop，防止长时间不用断网
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    def loop():
    count = 0
    while True:
        if isNetOK() != 0:
            if login() == 0:
                count+=1
                print('已断线重连%d次'%count)
            else:
                print("第一次连上网")
        else:
            print("已经连上网")

创建AP

安装create_ap

$git clone https://github.com/Scallions/auto_net_ap
$cd create_ap
$make install
# 安装依赖
$sudo apt install util-linux procps hostapd iproute2 iw haveged dnsmasq

使用

$create_ap wlan0 eth0 ssid pwd

开机启动

利用service

创建文件/etc/init.d/netap

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#!/bin/bash
#/etc/init.d/netandap
### BEGIN INIT INFO
# Provides: netandap
# Required-Start:$remote_fs $syslog
# Required-Stop:$remote_fs $syslog
# Default-Start:2 3 4 5
# Default-Stop:0 1 6
# Short-Description: netandap
# Description: This service is used to start my applaction
### END INIT INFO
case "$1" in
    start)
    echo "Connect Internet and Turn on AP"
    nohup /home/pi/whu-wlan.py > /dev/null 2>&1 &
    nohup /home/pi/wifi.sh > /dev/null 2>&1 &
    ;;
    stop)
    echo "Stop wifi."
    pkill whu-wlan
    killall create_ap
    killall wifi.sh
    ;;
    *)
    echo "Usage: service netandapt start|stop"
    exit 1
    ;;
esac
exit 0

添加服务

$sudo chmod 777 netap
$sudo update-rc.d netap defaults
# test
$sudo service netap start