EdgeRouter 配置 dnspod 动态域名更新

天狼晓月 · 发表于 2018-8-17 16:22:14

作者：mostone

测试路由器：UBNT EdgeRouter ER-X

路由器系统：EdgeRouter X v1.9.1.1

使用 Shell 脚本，配置为 pppoe 建立连接后被调用。

系统的 /etc/ppp/ip-up 脚本，会在 pppoe 连接建立后执行，并搜索 /config/scripts/ppp/ip-up.d/ 目录，执行目录下的所有脚本文件。

其中 /config/scripts 是路由器默认的配置目录，如果更新路由器固件，并不会删除其中的文件。

这款路由器支持 ssh 远程登录，可以使用 sftp 上传文件，放到 /config/scripts/ppp/ip-up.d/ 目录下即可，如果目录不存在，先建立目录层级。

脚本文件以下面方式运行(脚本文件名可以任意更改)：

（注：在使用之前，需要修改文件，设置正确的 ACCESS_TOKEN。参考：https://support.dnspod.cn/Kb/showarticle/tsid/227/）

1. $> /config/scripts/ppp/ip-up.d/ddnspod.sh -q mydomain.com www

这用来查询 mydomain.com 在平台上的 domainId, www 的 recordId

2. $> /config/scripts/ppp/ip-up.d/ddnspod.sh --test 1111 2222 www 0 10.1.1.1

这用来提交测试的 IP 地址， 1111 为上面取得的 domainId，2222 为上面取得的 recordId，www 为子域名(可以用 @ 来更新主域名)，0 为 record_line_id，最后是要提交的新 IP 地址。

record_line_id，如果是默认线路，值为 0，更多的可选值请参考：https://www.dnspod.cn/docs/domains.html#record-line

"line_ids": {
"默认": 0,
"国内": "7=0",
"国外": "3=0",
"电信": "10=0",
"联通": "10=1",
"教育网": "10=2",
"移动": "10=3",
"百度": "90=0",
"谷歌": "90=1",
"搜搜": "90=4",
"有道": "90=2",
"必应": "90=3",
"搜狗": "90=5",
"奇虎": "90=6",
"搜索引擎": "80=0"
}

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提交的线路 id 值应该与你的设置保持一致。
如果 id 值中含有等号，请将 '=' 换成 '%3D'，进行转义，如 "7%3D0"

3. 路由器重新建立 pppoe 连接时，自动被调用执行

这种方式使用，需要修改文件的最后一行，设置由上面第一种方式取得的 domainId 和 recordId，如果有多个域名要更新，复制为多行，并修改相应的 domainId, recordId 即可。

可以在 /var/log/ppp.log 中查看最后一次记录消息

ddnspod-ubnt.sh 代码：

#!/bin/sh
#################################################
# MosDdns for EdgeRouter X v1.0
# Dynamic DNS using DNSPod API
# Original by mostone<mostone@hotmail.com>, http://www.anrip.com/ddnspod
# Tested on EdgeRouter X v1.9.1.1
#################################################
# Usage:
# step 1. Set accessToken value at bellow.
# step 2. Input command in Shell: ddnspod-ubnt.sh -p domainName subdomainName
# this command will print domainId and recordId.
# step 3. Add updateDdns function call in the last of this file, replace your
# real domainId and recordId which get from step 1.
# step 4. copy this shell script file to ubnt router.
# path: /config/scripts/ppp/ip-up.d/
# this file will be call by /etc/ppp/ip-up.
#
# Done.
# Global Variables:
# Combine your token Id and token together as follows
ACCESS_TOKEN="11111,exxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx4"
IS_PPP_UP=1
if [ -z $PPP_LOCAL ]; then
IS_PPP_UP=0
fi
showMsg() {
echo $1
if [ $IS_PPP_UP -eq 1 ]; then
echo $1 >> /var/log/ppp.log
fi
}
# arguments: apiInterface postParameters
callApi() {
local agent="MosDdns/1.0(mostone@hotmail.com)"
local url="https://dnsapi.cn/${1:?'Info.Version'}"
local params="login_token=${ACCESS_TOKEN}&format=json&${2}"
curl --silent --request POST --user-agent $agent $url --data $params
}
# arguments: domainName subdomainName
printDomainAndRecordIds() {
local response domainId recordId lastIp
# Get domain Id
response=$(callApi "Domain.Info" "domain=${1}")
# echo "Domain.Info call respone: ${response}"
domainId=$(echo $response | sed 's/.*{"id":"$[0-9]*$".*/\1/')
echo " Domain[${1}] Id is: ${domainId}"
# Get Record Id
response=$(callApi "Record.List" "domain_id=${domainId}&sub_domain=${2}")
# echo "Record.List call respone: ${response}"
recordId=$(echo $response | sed 's/.*\[{"id":"$[0-9]*$".*/\1/')
echo " Record[${2}] Id is: ${recordId}"
# Print last Ip
lastIp=$(echo $response | sed 's/.*,"value":"$[0-9\.]*$".*/\1/')
echo " Server side last Ip: ${lastIp}"
}
# arguments: domainId recordId
getLastIp() {
local response lastIp
# get last Ip
response=$(callApi "Record.Info" "domain_id=${1}&record_id=${2}")
lastIp=$(echo $response | sed 's/.*,"value":"$[0-9\.]*$".*/\1/')
# validate Ip
case "$lastIp" in
[1-9][0-9]*)
echo $lastIp
return 0
;;
*)
echo $response | sed 's/.*,"message":"$[^"]*$".*/\1/'
return 1
;;
esac
}
# arguments: domainId recordId subdomainName lineId newIp
updateDdns() {
local response returnCode recordIp lastIp
# get last Ip
lastIp=$(getLastIp $1 $2)
if [ $? -eq 1 ]; then
showMsg $lastIp
return 1
fi
# same Ip check
if [ "$lastIp" = "$5" ]; then
showMsg "Server side last Ip is the same as current local Ip!"
return 1
fi
# update Ip
response=$(callApi "Record.Ddns" "domain_id=${1}&record_id=${2}&sub_domain=${3}&record_line_id=${4}&value=${5}&record_type=A")
returnCode=$(echo $response | sed 's/.*{"code":"$[0-9]*$".*/\1/')
recordIp=$(echo $response | sed 's/.*,"value":"$[0-9\.]*$".*/\1/')
showMsg "${response}"
# Output Ip
if [ "$recordIp" = "$5" ]; then
if [ "$returnCode" = "1" ]; then
showMsg "New Ip post success: ${recordIp}"
else
# Echo error message
showMsg $(echo $response | sed 's/.*,"message":"$[^"]*$".*/\1/')
fi
else
showMsg "Update Failed! Please check your network."
fi
}
# use -q to print domain and record Ids
if [ "-q" = "$1" ]; then
printDomainAndRecordIds $2 $3
exit 0
fi
# use (--test domainId recordId subdomainName lineId newIp) to test update
if [ "--test" = "$1" ]; then
updateDdns $2 $3 $4 $5 $6
exit 0
fi
# to sure be call by /etc/ppp/ip-up
if [ $IS_PPP_UP -eq 0 ]; then
echo "Please copy script file to /config/scripts/ppp/ip-up.d/"
exit 0
else
date > /var/log/ppp.log
echo -e " PPP_LOCAL:${PPP_LOCAL} \n PPP_REMOTE:${PPP_REMOTE}" >> /var/log/ppp.log
fi
# Place each domain you want to update as follows
# you can have multiple domainList blocks
#
# updateDdns arguments: domainId recordId subdomainName lineId newIp
#
# lineId samples: "line_ids": {
# "默认": 0,
# "国内": "7=0", 请将 '=' 换成 '%3D', "7%3D0"
# "国外": "3=0",
# "电信": "10=0",
# "联通": "10=1", ......
# lineId list refrence: https://www.dnspod.cn/docs/domains.html#record-line
# (note: lineId if include '=', please replace with '%3D')
updateDdns "1111111" "222222" "@" "0" $PPP_LOCAL

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补记：开了 VPN Server 之后，有客户端连接时，也会被执行，这时需要加一个 if 判断：

if [ "$PPP_IFACE" != "pppoe0" ]; then
#echo -e "PPP_IFACE:[${PPP_IFACE}]\nnot pppoe0" >> /var/log/ppp.log
exit 0
fi

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参考资料：https://github.com/anrip/ArDNSPod

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