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List more private and link-local IP networks (#74064)

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List more private and link-local IP networks

The IPv6 link-local network is especially important as without it
local accounts don't work on IPv6-capable networks with no IPv6 DHCP
server.
This commit is contained in:
[pʲɵs] 2022-06-28 07:00:44 +02:00 committed by GitHub
parent df357962b3
commit 91a119917d
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2 changed files with 22 additions and 7 deletions
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21
homeassistant/util/network.py
View File

@ -14,14 +14,21 @@ LOOPBACK_NETWORKS = (
# RFC6890 - Address allocation for Private Internets # RFC6890 - Address allocation for Private Internets
PRIVATE_NETWORKS = ( PRIVATE_NETWORKS = (
ip_network("fd00::/8"),
ip_network("10.0.0.0/8"), ip_network("10.0.0.0/8"),
ip_network("172.16.0.0/12"), ip_network("172.16.0.0/12"),
ip_network("192.168.0.0/16"), ip_network("192.168.0.0/16"),
ip_network("fd00::/8"),
ip_network("::ffff:10.0.0.0/104"),
ip_network("::ffff:172.16.0.0/108"),
ip_network("::ffff:192.168.0.0/112"),
) )
# RFC6890 - Link local ranges # RFC6890 - Link local ranges
LINK_LOCAL_NETWORK = ip_network("169.254.0.0/16") LINK_LOCAL_NETWORKS = (
ip_network("169.254.0.0/16"),
ip_network("fe80::/10"),
ip_network("::ffff:169.254.0.0/112"),
)
def is_loopback(address: IPv4Address | IPv6Address) -> bool: def is_loopback(address: IPv4Address | IPv6Address) -> bool:
@ -30,18 +37,18 @@ def is_loopback(address: IPv4Address | IPv6Address) -> bool:
def is_private(address: IPv4Address | IPv6Address) -> bool: def is_private(address: IPv4Address | IPv6Address) -> bool:
"""Check if an address is a private address.""" """Check if an address is a unique local non-loopback address."""
return any(address in network for network in PRIVATE_NETWORKS) return any(address in network for network in PRIVATE_NETWORKS)
def is_link_local(address: IPv4Address | IPv6Address) -> bool: def is_link_local(address: IPv4Address | IPv6Address) -> bool:
"""Check if an address is link local.""" """Check if an address is link-local (local but not necessarily unique)."""
return address in LINK_LOCAL_NETWORK return any(address in network for network in LINK_LOCAL_NETWORKS)
def is_local(address: IPv4Address | IPv6Address) -> bool: def is_local(address: IPv4Address | IPv6Address) -> bool:
"""Check if an address is loopback or private.""" """Check if an address is on a local network."""
return is_loopback(address) or is_private(address) return is_loopback(address) or is_private(address) or is_link_local(address)
def is_invalid(address: IPv4Address | IPv6Address) -> bool: def is_invalid(address: IPv4Address | IPv6Address) -> bool:

8
tests/util/test_network.py
View File

@ -30,7 +30,9 @@ def test_is_private():
def test_is_link_local(): def test_is_link_local():
"""Test link local addresses.""" """Test link local addresses."""
assert network_util.is_link_local(ip_address("169.254.12.3")) assert network_util.is_link_local(ip_address("169.254.12.3"))
assert network_util.is_link_local(ip_address("fe80::1234:5678:abcd"))
assert not network_util.is_link_local(ip_address("127.0.0.1")) assert not network_util.is_link_local(ip_address("127.0.0.1"))
assert not network_util.is_link_local(ip_address("::1"))
def test_is_invalid(): def test_is_invalid():
@ -43,7 +45,13 @@ def test_is_local():
"""Test local addresses.""" """Test local addresses."""
assert network_util.is_local(ip_address("192.168.0.1")) assert network_util.is_local(ip_address("192.168.0.1"))
assert network_util.is_local(ip_address("127.0.0.1")) assert network_util.is_local(ip_address("127.0.0.1"))
assert network_util.is_local(ip_address("fd12:3456:789a:1::1"))
assert network_util.is_local(ip_address("fe80::1234:5678:abcd"))
assert network_util.is_local(ip_address("::ffff:192.168.0.1"))
assert not network_util.is_local(ip_address("208.5.4.2")) assert not network_util.is_local(ip_address("208.5.4.2"))
assert not network_util.is_local(ip_address("198.51.100.1"))
assert not network_util.is_local(ip_address("2001:DB8:FA1::1"))
assert not network_util.is_local(ip_address("::ffff:208.5.4.2"))
def test_is_ip_address(): def test_is_ip_address():