分别 wget Google 和 Baidu，失败则尝试重启 shadowsocks 和 chinadns，仍失败则重启路由。
以下脚本需要先 opkg install wget，安装完整版的 wget 才可执行。
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#!/bin/sh LOGTIME=$(date "+%Y-%m-%d %H:%M:%S") wget -4 -q -O /etc/ss/google.html --quiet --tries=3 --timeout=10 www.google.com.hk wget -4 -q -O /etc/ss/baidu.html --quiet --tries=3 --timeout=10 www.baidu.com g_size=$(ls -l /etc/ss/google.html | awk '{ print $5 }') b_size=$(ls -l /etc/ss/baidu.html | awk '{ print $5 }') error=0 if [ $g_size -gt 0 ] && [ $b_size -gt 0 ] ; then echo '['$LOGTIME'] No Problem.' >> /etc/ss/status.log rm /etc/ss/google.html rm /etc/ss/baidu.html exit 0 else error=1 fi if [ $error=1 ] ; then echo '['$LOGTIME'] Problem decteted. Restarting shadowsocks.' >> /etc/ss/status.log /etc/init.d/shadowsocks restart sleep 5 # /etc/init.d/chinadns restart sleep 5 LOGTIME=$(date "+%Y-%m-%d %H:%M:%S") wget -4 -q -O /etc/ss/google.html --quiet --tries=3 --timeout=10 www.google.com.hk wget -4 -q -O /etc/ss/baidu.html --quiet --tries=3 --timeout=10 www.baidu.com g_size=$(ls -l /etc/ss/google.html | awk '{ print $5 }') b_size=$(ls -l /etc/ss/google.html | awk '{ print $5 }') if [ $g_size -gt 0 ] && [ $b_size -gt 0 ] ; then echo '['$LOGTIME'] Problem fixed.' >> /etc/ss/status.log rm /etc/ss/google.html rm /etc/ss/baidu.html error=0 exit 0 else echo '['$LOGTIME'] Unable to fix the problem. Restarting router.' >> /etc/ss/status.log reboot -f fi fi |
最后设置 755 运行权限，定时执行即可。记得间隔时间千万不要太短。我手贱设置成了 1 分钟执行一次，结果它真的重启了，然而 1 分钟根本不够它完成联网，导致重启被无限循环，费了好大劲才旧救回来……
如果只检测百度可以使用下面的简化版：中间加了 pdnsd 等服务，不需要可以自己删除。
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#!/bin/sh LOGTIME=$(date "+%Y-%m-%d %H:%M:%S") wget -4 -q -O /etc/ss/baidu.html --quiet --tries=3 --timeout=10 www.baidu.com b_size=$(ls -l /etc/ss/baidu.html | awk '{ print $5 }') if [ $b_size -gt 0 ] ; then echo '['$LOGTIME'] No Problem.' >> /etc/ss/status.log rm /etc/ss/baidu.html exit 0 else echo '['$LOGTIME'] Problem decteted. Restarting pdnsd, dnsmasq, dnscrypt.' >> /etc/ss/status.log /etc/init.d/pdnsd restart sleep 5 /etc/init.d/dnsmasq restart sleep 5 /etc/init.d/dnscrypt-proxy restart sleep 5 LOGTIME=$(date "+%Y-%m-%d %H:%M:%S") wget -4 -q -O /etc/ss/baidu.html --quiet --tries=3 --timeout=10 www.baidu.com b_size=$(ls -l /etc/ss/baidu.html | awk '{ print $5 }') if [ $g_size -gt 0 ] && [ $b_size -gt 0 ] ; then echo '['$LOGTIME'] Problem fixed.' >> /etc/ss/status.log rm /etc/ss/baidu.html exit 0 else echo '['$LOGTIME'] Unable to fix the problem. Restarting router.' >> /etc/ss/status.log #reboot -f fi fi |