Add ipinterface type to fieldtypes.net (#160)

Author: Miauwkeru

flow/record/fieldtypes/net/__init__.py

@@ -1,12 +1,19 @@
 from __future__ import annotations
 
 from flow.record.fieldtypes import string
-from flow.record.fieldtypes.net.ip import IPAddress, IPNetwork, ipaddress, ipnetwork
+from flow.record.fieldtypes.net.ip import (
+    IPAddress,
+    IPNetwork,
+    ipaddress,
+    ipinterface,
+    ipnetwork,
+)
 
 __all__ = [
     "IPAddress",
     "IPNetwork",
     "ipaddress",
+    "ipinterface",
     "ipnetwork",
 ]
 

flow/record/fieldtypes/net/ip.py

@@ -2,10 +2,13 @@
 
 from ipaddress import (
     IPv4Address,
+    IPv4Interface,
     IPv4Network,
     IPv6Address,
+    IPv6Interface,
     IPv6Network,
     ip_address,
+    ip_interface,
     ip_network,
 )
 from typing import Union
@@ -15,16 +18,19 @@
 
 _IPNetwork = Union[IPv4Network, IPv6Network]
 _IPAddress = Union[IPv4Address, IPv6Address]
+_IPInterface = Union[IPv4Interface, IPv6Interface]
+_ConversionTypes = Union[str, int, bytes]
+_IPTypes = Union[_IPNetwork, _IPAddress, _IPInterface]
 
 
 class ipaddress(FieldType):
-    val = None
+    val: _IPAddress = None
     _type = "net.ipaddress"
 
-    def __init__(self, addr: str | int | bytes):
+    def __init__(self, addr: _ConversionTypes | _IPAddress):
         self.val = ip_address(addr)
 
-    def __eq__(self, b: str | int | bytes | _IPAddress) -> bool:
+    def __eq__(self, b: _ConversionTypes | _IPAddress) -> bool:
         try:
             return self.val == ip_address(b)
         except ValueError:
@@ -53,13 +59,13 @@ def _unpack(data: int) -> ipaddress:
 
 
 class ipnetwork(FieldType):
-    val = None
+    val: _IPNetwork = None
     _type = "net.ipnetwork"
 
-    def __init__(self, addr: str | int | bytes):
+    def __init__(self, addr: _ConversionTypes | _IPNetwork):
         self.val = ip_network(addr)
 
-    def __eq__(self, b: str | int | bytes | _IPNetwork) -> bool:
+    def __eq__(self, b: _ConversionTypes | _IPNetwork) -> bool:
         try:
             return self.val == ip_network(b)
         except ValueError:
@@ -98,6 +104,52 @@ def _pack(self) -> str:
     def _unpack(data: str) -> ipnetwork:
         return ipnetwork(data)
 
+    @property
+    def netmask(self) -> ipaddress:
+        return ipaddress(self.val.netmask)
+
+
+class ipinterface(FieldType):
+    val: _IPInterface = None
+    _type = "net.ipinterface"
+
+    def __init__(self, addr: _ConversionTypes | _IPTypes) -> None:
+        self.val = ip_interface(addr)
+
+    def __eq__(self, b: _ConversionTypes | _IPTypes) -> bool:
+        try:
+            return self.val == ip_interface(b)
+        except ValueError:
+            return False
+
+    def __hash__(self) -> int:
+        return hash(self.val)
+
+    def __str__(self) -> str:
+        return str(self.val)
+
+    def __repr__(self) -> str:
+        return f"{self._type}({str(self)!r})"
+
+    @property
+    def ip(self) -> ipaddress:
+        return ipaddress(self.val.ip)
+
+    @property
+    def network(self) -> ipnetwork:
+        return ipnetwork(self.val.network)
+
+    @property
+    def netmask(self) -> ipaddress:
+        return ipaddress(self.val.netmask)
+
+    def _pack(self) -> str:
+        return self.val.compressed
+
+    @staticmethod
+    def _unpack(data: str) -> ipinterface:
+        return ipinterface(data)
+
 
 # alias: net.IPAddress -> net.ipaddress
 # alias: net.IPNetwork -> net.ipnetwork

flow/record/jsonpacker.py

@@ -68,7 +68,7 @@ def pack_obj(self, obj: Any) -> dict | str:
                 "sha1": obj.sha1,
                 "sha256": obj.sha256,
             }
-        if isinstance(obj, (fieldtypes.net.ipaddress, fieldtypes.net.ipnetwork)):
+        if isinstance(obj, (fieldtypes.net.ipaddress, fieldtypes.net.ipnetwork, fieldtypes.net.ipinterface)):
             return str(obj)
         if isinstance(obj, bytes):
             return base64.b64encode(obj).decode()

flow/record/whitelist.py

@@ -24,6 +24,7 @@
     "bytes",
     "record",
     "net.ipaddress",
+    "net.ipinterface",
     "net.ipnetwork",
     "net.IPAddress",
     "net.IPNetwork",

tests/test_fieldtype_ip.py

@@ -128,6 +128,85 @@ def test_record_ipnetwork() -> None:
     assert "::1" not in data
 
 
+def test_record_ipinterface() -> None:
+    TestRecord = RecordDescriptor(
+        "test/ipinterface",
+        [
+            ("net.ipinterface", "interface"),
+        ],
+    )
+
+    # ipv4
+    r = TestRecord("192.168.0.0/24")
+    assert r.interface == "192.168.0.0/24"
+    assert "bad.ip" not in r.interface.network
+    assert "192.168.0.1" in r.interface.network
+    assert isinstance(r.interface, net.ipinterface)
+    assert repr(r.interface) == "net.ipinterface('192.168.0.0/24')"
+    assert hash(r.interface) == hash(net.ipinterface("192.168.0.0/24"))
+
+    r = TestRecord("192.168.1.1")
+    assert r.interface.ip == "192.168.1.1"
+    assert r.interface.network == "192.168.1.1/32"
+    assert r.interface == "192.168.1.1/32"
+    assert r.interface.netmask == "255.255.255.255"
+
+    r = TestRecord("192.168.1.24/255.255.255.0")
+    assert r.interface == "192.168.1.24/24"
+    assert r.interface.ip == "192.168.1.24"
+    assert r.interface.network == "192.168.1.0/24"
+    assert r.interface.netmask == "255.255.255.0"
+
+    # ipv6 - https://en.wikipedia.org/wiki/IPv6_address
+    r = TestRecord("::1")
+    assert r.interface == "::1"
+    assert r.interface == "::1/128"
+
+    r = TestRecord("64:ff9b::2/96")
+    assert r.interface == "64:ff9b::2/96"
+    assert r.interface.ip == "64:ff9b::2"
+    assert r.interface.network == "64:ff9b::/96"
+    assert r.interface.netmask == "ffff:ffff:ffff:ffff:ffff:ffff::"
+
+    # instantiate from different types
+    assert TestRecord(1).interface == "0.0.0.1/32"
+    assert TestRecord(0x7F0000FF).interface == "127.0.0.255/32"
+    assert TestRecord(b"\x7f\xff\xff\xff").interface == "127.255.255.255/32"
+
+    # Test whether it functions in a set
+    data = {TestRecord(x).interface for x in ["192.168.0.0/24", "192.168.0.0/24", "::1", "::1"]}
+    assert len(data) == 2
+    assert net.ipinterface("::1") in data
+    assert net.ipinterface("192.168.0.0/24") in data
+    assert "::1" not in data
+
+
+def test_record_ipinterface_types() -> None:
+    TestRecord = RecordDescriptor(
+        "test/ipinterface",
+        [
+            (
+                "net.ipinterface",
+                "interface",
+            )
+        ],
+    )
+
+    r = TestRecord("192.168.0.255/24")
+    _if = r.interface
+    assert isinstance(_if, net.ipinterface)
+    assert isinstance(_if.ip, net.ipaddress)
+    assert isinstance(_if.network, net.ipnetwork)
+    assert isinstance(_if.netmask, net.ipaddress)
+
+    r = TestRecord("64:ff9b::/96")
+    _if = r.interface
+    assert isinstance(_if, net.ipinterface)
+    assert isinstance(_if.ip, net.ipaddress)
+    assert isinstance(_if.network, net.ipnetwork)
+    assert isinstance(_if.netmask, net.ipaddress)
+
+
 @pytest.mark.parametrize("PSelector", [Selector, CompiledSelector])
 def test_selector_ipaddress(PSelector: type[Selector]) -> None:
     TestRecord = RecordDescriptor(