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Shell脚本实现多选DNS同时批量解析域名IP地址(新更新)

2022-08-02 09:41:00 【isk--cosann】

背景前文

该脚本是在原先《shell脚本实现批量解析域名IP地址（支持多DNS）》的基础上再进行了代码逻辑优化和小细节代码更新，重要变动部分如下：

增加任意多选DNS逻辑，即执行时可不选定目标DNS，只需指定DNS_File文件（默认DNS为114.114.114.114，有定制需求可自行修改）

实现代码

#!/bin/bash
#Author:cosann
#Function:批量解析域名A记录和CNAME记录脚本
#version:2.0
#Create Time:20220714
#Update Time: 20220801
#Description:
#1.支持DNSIP传参判定
#2.支持DNS解析域名文件判定
#3.自定义多选DNS(默认DNS:114.114.114.114,最多支持三个DNS解析)

clear   #脚本运行时清屏
#提示脚本信息
cat <<EOF ============================================= == Welcome to the DNS resolution script ===== --------------------------------------------- #1.Author:Cosann #2.Function:批量解析域名A记录和CNAME记录脚本 #3.version:2.0 #4.Description: - 支持DNSIP传参判定 - 支持DNS解析域名文件判定 - 自定义多选DNS(默认DNS:114.114.114.114 最多支持三个DNS解析) ============================================= EOF

echo    #换行

#初始化默认DNS服务器
dns=114.114.114.114   


#定义DNS文本检测函数
function dns_file_cleck () {
    
    if ! [ -f "$dns_file" ]
    then
        echo "$4文件错误,请检查文本文件"
        exit 
    fi
}

#定义DNS网络检测函数
function Ping_Stat_1 (){
    
    ping -w 1 $dns1 &> /dev/null    #ping测试
    if [ "`echo $?`" == 0 ]
    then
        return 100  #返回DNS目标网络可达数值
    else
        return 200  #返回DNS目标网络不可达数值
    fi
}
function Ping_Stat_2 (){
    
    ping -w 1 $dns2 &> /dev/null
    if [ "`echo $?`" == 0 ]
    then
        return 100
    else
        return 200
    fi
}
function Ping_Stat_3 (){
    
    ping -w 1 $dns3 &> /dev/null
    if [ "`echo $?`" == 0 ]
    then
        return 100
    else
        return 200
    fi
}

#传参检测及执行控制
if [ $# -eq "1" ]
then 
    dns1=$dns;dns_file=$1;
    echo -e "DNS:$dns1\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck   #调用DNS文本检测函数
    Ping_Stat_1     #DNS检测函数调用
    code1=`echo $?`
elif [ $# -eq "2" ]
then
    dns1=$1;dns_file=$2
    echo -e "DNS:$dns1\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck    
    Ping_Stat_1 
    code1=`echo $?` 
    echo $code1
elif [ $# -eq "3" ]
then
    dns1=$1;dns2=$2;dns_file=$3
    echo -e "DNS:$dns1 $dns2\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck  
    Ping_Stat_1 
    code1=`echo $?`
    Ping_Stat_2 
    code2=`echo $?`

elif [ $# -eq "4" ]
then
    dns1=$1;dns2=$2;dns3=$3;dns_file=$4
    echo -e "DNS:$dns1 $dns2 $dns3\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck 
    Ping_Stat_1 
    code1=`echo $?`
    Ping_Stat_2 
    code2=`echo $?`
    Ping_Stat_3 
    code3=`echo $?`

else
    echo -e "Usage: $0 dns1 dns2 dns3 dns_file"
    exit
fi

echo -e "》》》DNS连通性检测中,请稍等》》》"

#DNS解析控制及解析功能实现
if [ "$code1" == 100 ];then
    echo -e "-------------------------------------------\n"
    echo -e "DNS:$dns1 OK\n"
    echo -e "DNS1(IP:$dns1)"
    echo -e "域名\t\t\tA记录/CNAME 记录"
    cat $dns_file | while read line
    do
        dig @$dns1  $line A +short | sed "s/^/$line\t\t/g" 
    done
    echo -e "\n"
elif [ "$code1" == 200 ];then
    echo -e "DNS:$dns1 NG" && echo -e "目标DNS网络不可达!\n"
fi

if [ "$code2" == 100 ];then
    echo -e "-------------------------------------------\n"
    echo -e "DNS:$dns2 OK\n"
    echo -e "DNS2(IP:$dns2)"
    echo -e "域名\t\t\tA记录/CNAME记录"
    cat $dns_file | while read line
    do
        dig @$dns2  $line A +short | sed "s/^/$line\t\t/g" 
    done
    echo -e "\n"
elif [ "$code2" == 200 ];then
    echo -e "DNS:$dns2 NG" && echo -e "目标DNS网络不可达!\n"
fi 

if [ "$code3" == 100 ];then
    echo -e "-------------------------------------------\n"
    echo -e "DNS:$dns3 OK\n"
    echo -e "DNS3(IP:$dns3)"
    echo -e "域名\t\t\tA记录/CNAME记录"
    cat $dns_file | while read line
    do
        dig @$dns3  $line A +short  | sed "s/^/$line\t\t/g" 
    done
elif [ "$code3" == 200 ];then
    echo -e "DNS:$dns3 NG" && echo -e "目标DNS网络不可达!\n"
fi

exit 0