工信部强制要求运营商为家庭宽带设置公网IPv6，基本所有人都能够获取到IPv6，由于大部分IP是动态的，所以可以用python代码去动态解析域名到家庭公网上
手动运行一次：
python dynamic_modify_dns.py -domain=xxx.top -sub_domain=ipv6 -is_ipv6 -check_ip_fmt
参数解释：
-is_ipv6选项可以选择ipv6模式，默认是ipv4模式
-domain参数即为你拥有的域名
-sub_domain是指定子域名，默认二级域名为ipv4 （例：ipv4.xxx.top）
-check_ip_fmt参数可以不加
运行前准备工作：
1.到为你的域名提供解析服务的dnspod控制台获取secret，填入到代码中的SECRET_ID和SECRET_KEY中，dnspod控制台网址：https://console.dnspod.cn/
2.安装一下依赖包
pip install -i https://mirrors.tencent.com/pypi/simple/ --upgrade tencentcloud-sdk-python click IPy
3.放到你的服务器上长久运行，推荐使用crontab（使用绝对路径更佳）
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* * * * * python dynamic_modify_dns.py -domain=xxx.top -sub_domain=ipv6 -is_ipv6 -check_ip_fmt > /tmp/ddns.log |
python代码
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import json import datetime import time import traceback import click as click from tencentcloud.common import credential from tencentcloud.common.profile.http_profile import HttpProfile from tencentcloud.common.profile.client_profile import ClientProfile from tencentcloud.common.exception.tencent_cloud_sdk_exception import TencentCloudSDKException from tencentcloud.dnspod.v20210323 import dnspod_client, models SECRET_ID = "" SECRET_KEY = "" def try_catch_and_score_time(fn): def _wrapper(*args, **kwargs): start = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') print(f"{start} start ddns.") ret = None try: ret = fn(*args, **kwargs) except TencentCloudSDKException as e: print(f"{traceback.format_exc()} error: {e}") end = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') print(f"{end} program exit now.") return ret return _wrapper class DDNS: def __init__(self, domain, sub_domain="", ipv6=True, check_ip_fmt=False): self._domain = domain self._sub_domain = sub_domain if len(sub_domain) > 0 else ("ipv6" if ipv6 else "ipv4") self._is_ipv6 = ipv6 self._record_type = "AAAA" if self._is_ipv6 else "A" # 待修改解析记录的解析类型，AAAA为解析到ipv6的记录类型 self._client = self.get_tencentcloud_client() self._check_ip_format = check_ip_fmt @try_catch_and_score_time def dynamic_modify_dns(self): """ 默认DDNS到ipv6地址 """ if self._client is None: return # 1. 获取域名下的所有解析记录 req = models.DescribeRecordRequest() params = { "Domain": self._domain } req.from_json_string(json.dumps(params)) resp = self._client.DescribeRecordList(req) # with open("record_list.json", "w") as f: # f.write(resp.to_json_string()) record_list = resp.RecordList if len(record_list) <= 0: print(f"RecordList length is 0. service will exit.") return # 2. 过滤解析记录列表，拿到需要修改的记录 record_need_to_modify: models.RecordListItem = None for record in record_list: name = record.Name record_type = record.Type if self._sub_domain != name or self._record_type != record_type: continue record_need_to_modify = record old_value = None if record_need_to_modify is None: print(f"{self._domain} doesn't have {self._sub_domain} {self._record_type} sub domain. " f"to create {self._sub_domain}.{self._domain} {self._record_type} record.") mod_record_id = self.create_dns_record() else: mod_record_id = record_need_to_modify.RecordId old_value = record_need_to_modify.Value # 3. 修改解析记录到动态ip上 dst_ip = self.get_dst_ip_for_dns_record(is_ipv6=self._is_ipv6, check=self._check_ip_format) if dst_ip is None: print(f"can't get new ip for ddns.") return if old_value == dst_ip: print(f"value doesn't need to update. value: {old_value}.") return req = models.ModifyDynamicDNSRequest() params = { "Domain": self._domain, "SubDomain": self._sub_domain, # 如果不传，默认为 @ "RecordId": mod_record_id, "RecordLine": "默认", "Value": dst_ip } print(params) req.from_json_string(json.dumps(params)) resp = self._client.ModifyDynamicDNS(req) if str(mod_record_id) in resp.to_json_string(): print("successfully update ddns record！") @staticmethod def get_tencentcloud_client(): for cnt in range(3): try: cred = credential.Credential(SECRET_ID, SECRET_KEY) httpProfile = HttpProfile() httpProfile.endpoint = "dnspod.tencentcloudapi.com" clientProfile = ClientProfile() clientProfile.httpProfile = httpProfile client = dnspod_client.DnspodClient(cred, "", clientProfile) return client except TencentCloudSDKException as e: print(f"program get tencent cloud client error for {cnt}: {e}.") time.sleep(cnt + 1) return None def create_dns_record(self): req = models.CreateRecordRequest() params = { "Domain": self._domain, "SubDomain": self._sub_domain, "RecordType": self._record_type, "RecordLine": "默认", "Value": "::1" if self._is_ipv6 else "127.0.0.1" } req.from_json_string(json.dumps(params)) resp = self._client.CreateRecord(req) return resp.RecordId def get_dst_ip_for_dns_record(self, is_ipv6, check=True): """ 获取解析到的ip :return: """ # 1. 第一种方法，向免费公共方法获取目前的外网IP import requests url = f"https://api{6 if is_ipv6 else ''}.ipify.org?format=json" r = requests.get(url, timeout=5) ip = json.loads(r.text).get('ip', None) if check: ip = self.check_ip_and_format(ip) return ip def check_ip_and_format(self, ipv6: str): if ipv6 == None: return None try: import IPy v = 6 if self._is_ipv6 else 4 IP = IPy.IP(ipv6) IP.iptype() # if IP.version == v and IP.iptype() in ['ALLOCATED APNIC']: if IP.version() == v: return str(IP) except Exception as e: print(e) return None # * * * * * python dynamic_modify_dns.py -domain=xxx.top -sub_domain=ipv6 -is_ipv6 -check_ip_fmt > /tmp/ddns.log @click.command() @click.option('-domain', required=True, default="", help="个人拥有的域名") @click.option('-sub_domain', default="ipv6", help="设置的二级域名") @click.option('-is_ipv6', is_flag=True, default=False, help="是否DDNS到ipv6上") @click.option('-check_ip_fmt', is_flag=True, default=False, help="检查IP格式") def cmd(domain, sub_domain, is_ipv6, check_ip_fmt): DDNS(domain=domain, sub_domain=sub_domain, ipv6=is_ipv6, check_ip_fmt=check_ip_fmt).dynamic_modify_dns() if __name__ == '__main__': cmd() |
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