add ip addrs validation

pddnsc/base.py

@@ -1,7 +1,8 @@
 import httpx
 import asyncio
 from abc import ABC, abstractmethod
-from typing import NamedTuple
+from typing import NamedTuple, Optional
+from netaddr import valid_ipv4, valid_ipv6
 
 
 class IPAddreses(NamedTuple):
@@ -154,3 +155,11 @@ class BaseFilterProvider(ABC):
 
     @abstractmethod
     async def check_imp(self, source_provider, addr_v4, addr_v6): ...
+
+
+def filter_ipv4(value: str) -> Optional[str]:
+    return value and valid_ipv4(value) and value or None
+
+
+def filter_ipv6(value: str) -> Optional[str]:
+    return value and valid_ipv6(value) and value or None

requirements.txt

@@ -2,3 +2,4 @@ httpx[http2]>=0.26,<1.0
 asyncio>=3.4.3,<4
 aiofiles>=23,<24
 toml>=0.10,<1
+netaddr>=1,<2