#设置一些必要的变量
keyname=rndc-key
keysecret=gAnBYq6xSv7FKTZFmzAD0Q==
#用来检测本机网络是否正常
function network_detect(){
ping -c1 8.8.8.8 >/dev/null 2>&1 && echo connect || exit 1
}
#用来删除DNS记录
function del_record(){
/usr/local/bind/bin/nsupdate <<EOF
key $keyname $keysecret
update delete $domain A $1
send
quit
EOF
}
#用来增加DNS记录
function add_record(){
/usr/local/bind/bin/nsupdate <<EOF
key $keyname $keysecret
update add $domain 3600 A $1
send
quit
EOF
}