适用于truenas的ipv6阿里云ddns脚本

```shell
#!/bin/bash
# alidns.sh
#https://www.cnblogs.com/elvi/p/11663910.html
#阿里云DNS api接口 shell 更改DNS解析

##############################
which dig &>/dev/null || { yum install -y bind-utils ; } || { echo "need to install dig";exit 1; }

##配置
host="mc" #主机名
domain="ihoiwan.com" #域名
ak=""  #阿里云AccessKey ID
sk="&"  #阿里云Access Key Secret  后面多个 &
timestamp=`date -u +"%Y-%m-%dT%H:%M:%SZ"`

##############################
#hash签名使用
urlencode1() {
    local length="${#1}"
    i=0
    out=""
    for i in $(awk "BEGIN { for ( i=0; i<$length; i++ ) { print i; } }")
    do
        local c="${1:$i:1}"
        case $c in
            [a-zA-Z0-9.~'&'=_-]) out="$out$c" ;;
            *) out="$out`printf '%%%02X' "'$c"`" ;;
        esac
        i=$(($i + 1))
     done
     echo -n $out
}
urlencode2() {
    local length="${#1}"
    i=0
    out=""
    for i in $(awk "BEGIN { for ( i=0; i<$length; i++ ) { print i; } }")
    do
        local c="${1:$i:1}"
        case $c in
            [a-zA-Z0-9.~_-]) out="$out$c" ;;
            *) out="$out`printf '%%%02X' "'$c"`" ;;
        esac
        i=$(($i + 1))
     done
     echo -n $out
}

##############################
#函数

send_request() {
args="AccessKeyId=$ak&Action=$1&Format=json&$2&Version=2015-01-09"
StringToSign1="$(urlencode1 $args)"
StringToSign2="GET&%2F&$(urlencode2 $StringToSign1)"
hash=$(urlencode2 $(echo -n "$StringToSign2" | openssl dgst -sha1 -hmac $sk -binary | openssl base64))
echo "https://alidns.aliyuncs.com/?$args&Signature=$hash"
RESULT=$(curl -k -s "https://alidns.aliyuncs.com/?$args&Signature=$hash")  ## 2> /dev/null)
echo $RESULT
}
query_recordid() {
 if [ "$host" = "@" ]; then
echo `send_request "DescribeSubDomainRecords" "SignatureMethod=HMAC-SHA1&SignatureNonce=$timestamp&SignatureVersion=1.0&SubDomain=$domain&Timestamp=$timestamp"`
 else
echo `send_request "DescribeSubDomainRecords" "SignatureMethod=HMAC-SHA1&SignatureNonce=$timestamp&SignatureVersion=1.0&SubDomain=$host.$domain&Timestamp=$timestamp"`
 fi
}
update_record() {
    echo `send_request "UpdateDomainRecord" "RR=$host&RecordId=$1&SignatureMethod=HMAC-SHA1&SignatureNonce=$timestamp&SignatureVersion=1.0&Timestamp=$timestamp&Type=AAAA&Value=$ip"`
}
add_record() {
    echo `send_request "AddDomainRecord&DomainName=$domain" "RR=$host&SignatureMethod=HMAC-SHA1&SignatureNonce=$timestamp&SignatureVersion=1.0&Timestamp=$timestamp&Type=AAAA&Value=$ip"`
}

add_host() {
#echo "新增解析"
RESULT=`add_record`
record_id=$(echo $RESULT | grep -o "RecordId\":\"[0-9]*\"" | grep -o "[0-9]*")
[ "$record_id" = "" ] && { echo "$host.$domain  $ip  AddError";exit 1; }
echo "$host.$domain  $ip  AddHost $(date +'%F %T')"
}

up_host() {
#echo "更新解析"
#查询RecordId
RESULT=`query_recordid`
record_id=`echo $RESULT |grep -o "RecordId\":\"[0-9]*\"" | grep -o "\"[0-9]*\"" |cut -d "\"" -f2`
[ "$record_id" = "" ] && { echo "get record_id error,id=$record_id";exit 1; }
#更新
RESULT=`update_record $record_id`
record_id=`echo $RESULT |grep -o "RecordId\":\"[0-9]*\"" | grep -o "\"[0-9]*\"" |cut -d "\"" -f2` 
[ "$record_id" = "" ] && { echo "$host.$domain  $ip  UpError";exit 1; }
echo "$host.$domain    $ip  UpHost $(date +'%F %T')"
}

##############################
#传参  主机 域名 ip

alidns() {
# var:  host domain ip
host="$1"
domain=$2
ip=`ping6 -c1 $host.$domain|head -n1 | awk '{print $3}'`
ip_dns=`ping6 -c1 $host.$domain|head -n1 | awk '{print $5}'`

if [ $# -eq 1 ];then
    if [ -n "$ip_dns" ];then
        echo "$host.$domain "
    else
        echo "$host.$domain  no found"
    fi
elif [ $# -eq 2 ];then
    if [ "$ip" = "$ip_dns" ];then
        echo "$host.$domain    $ip_dns"
    else
    #    [ `echo $ip |grep -oE '[0-9]{0,3}\.[0-9]{0,3}\.[0-9]{0,3}\.[0-9]{0,3}' |wc -l` -eq 0 ] && { echo "ip $ip error";exit 1; }
        [ "$ip_dns" = "" ] && { add_host ; } || { up_host ; }
    fi
else
    echo "eg:$0 www abc.com "
fi
}

alidns "$@"

# 使用实例 增加或更新  *.abc.elven.vip ,通配符使用''
# bash alidns.sh  '*.abc'  elven.vip  192.168.18.18
##############################
# api https://help.aliyun.com/knowledge_detail/39863.html
##############################

```