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# This file is part of cloud-init. See LICENSE file for license information.
import ipaddress
from unittest import mock
import pytest
from cloudinit import safeyaml
from cloudinit.net import network_state
from tests.unittests.helpers import CiTestCase
netstate_path = "cloudinit.net.network_state"
_V1_CONFIG_NAMESERVERS = """\
network:
version: 1
config:
- type: nameserver
interface: {iface}
address:
- 192.168.1.1
- 8.8.8.8
search:
- spam.local
- type: nameserver
address:
- 192.168.1.0
- 4.4.4.4
search:
- eggs.local
- type: physical
name: eth0
mac_address: '00:11:22:33:44:55'
- type: physical
name: eth1
mac_address: '66:77:88:99:00:11'
"""
V1_CONFIG_NAMESERVERS_VALID = _V1_CONFIG_NAMESERVERS.format(iface="eth1")
V1_CONFIG_NAMESERVERS_INVALID = _V1_CONFIG_NAMESERVERS.format(iface="eth90")
V2_CONFIG_NAMESERVERS = """\
network:
version: 2
ethernets:
eth0:
match:
macaddress: '00:11:22:33:44:55'
nameservers:
search: [spam.local, eggs.local]
addresses: [8.8.8.8]
eth1:
match:
macaddress: '66:77:88:99:00:11'
set-name: "ens92"
nameservers:
search: [foo.local, bar.local]
addresses: [4.4.4.4]
"""
class TestNetworkStateParseConfig(CiTestCase):
def setUp(self):
super(TestNetworkStateParseConfig, self).setUp()
nsi_path = netstate_path + ".NetworkStateInterpreter"
self.add_patch(nsi_path, "m_nsi")
def test_missing_version_returns_none(self):
ncfg = {}
with self.assertRaises(RuntimeError):
network_state.parse_net_config_data(ncfg)
def test_unknown_versions_returns_none(self):
ncfg = {"version": 13.2}
with self.assertRaises(RuntimeError):
network_state.parse_net_config_data(ncfg)
def test_version_2_passes_self_as_config(self):
ncfg = {"version": 2, "otherconfig": {}, "somemore": [1, 2, 3]}
network_state.parse_net_config_data(ncfg)
self.assertEqual(
[mock.call(version=2, config=ncfg, renderer=None)],
self.m_nsi.call_args_list,
)
def test_valid_config_gets_network_state(self):
ncfg = {"version": 2, "otherconfig": {}, "somemore": [1, 2, 3]}
result = network_state.parse_net_config_data(ncfg)
self.assertNotEqual(None, result)
def test_empty_v1_config_gets_network_state(self):
ncfg = {"version": 1, "config": []}
result = network_state.parse_net_config_data(ncfg)
self.assertNotEqual(None, result)
def test_empty_v2_config_gets_network_state(self):
ncfg = {"version": 2}
result = network_state.parse_net_config_data(ncfg)
self.assertNotEqual(None, result)
class TestNetworkStateParseConfigV2(CiTestCase):
def test_version_2_ignores_renderer_key(self):
ncfg = {"version": 2, "renderer": "networkd", "ethernets": {}}
with mock.patch("cloudinit.net.network_state.get_interfaces_by_mac"):
nsi = network_state.NetworkStateInterpreter(
version=ncfg["version"], config=ncfg
)
nsi.parse_config(skip_broken=False)
self.assertEqual(ncfg, nsi.as_dict()["config"])
class TestNetworkStateParseNameservers:
def _parse_network_state_from_config(self, config):
with mock.patch("cloudinit.net.network_state.get_interfaces_by_mac"):
yaml = safeyaml.load(config)
return network_state.parse_net_config_data(yaml["network"])
def test_v1_nameservers_valid(self):
config = self._parse_network_state_from_config(
V1_CONFIG_NAMESERVERS_VALID
)
# If an interface was specified, DNS shouldn't be in the global list
assert ["192.168.1.0", "4.4.4.4"] == sorted(config.dns_nameservers)
assert ["eggs.local"] == config.dns_searchdomains
# If an interface was specified, DNS should be part of the interface
for iface in config.iter_interfaces():
if iface["name"] == "eth1":
assert iface["dns"]["addresses"] == ["192.168.1.1", "8.8.8.8"]
assert iface["dns"]["search"] == ["spam.local"]
else:
assert "dns" not in iface
def test_v1_nameservers_invalid(self):
with pytest.raises(ValueError):
self._parse_network_state_from_config(
V1_CONFIG_NAMESERVERS_INVALID
)
def test_v2_nameservers(self, mocker):
mocker.patch("cloudinit.net.network_state.get_interfaces_by_mac")
mocker.patch("cloudinit.net.get_interfaces_by_mac")
config = self._parse_network_state_from_config(V2_CONFIG_NAMESERVERS)
# Ensure DNS defined on interface exists on interface
for iface in config.iter_interfaces():
if iface["name"] == "eth0":
assert iface["dns"] == {
"nameservers": ["8.8.8.8"],
"search": ["spam.local", "eggs.local"],
}
else:
assert iface["dns"] == {
"nameservers": ["4.4.4.4"],
"search": ["foo.local", "bar.local"],
}
# Ensure DNS defined on interface also exists globally (since there
# is no global DNS definitions in v2)
assert ["4.4.4.4", "8.8.8.8"] == sorted(config.dns_nameservers)
assert [
"bar.local",
"eggs.local",
"foo.local",
"spam.local",
] == sorted(config.dns_searchdomains)
class TestNetworkStateHelperFunctions(CiTestCase):
def test_mask_to_net_prefix_ipv4(self):
netmask_value = "255.255.255.0"
expected = 24
prefix_value = network_state.ipv4_mask_to_net_prefix(netmask_value)
assert prefix_value == expected
def test_mask_to_net_prefix_all_bits_ipv4(self):
netmask_value = "255.255.255.255"
expected = 32
prefix_value = network_state.ipv4_mask_to_net_prefix(netmask_value)
assert prefix_value == expected
def test_mask_to_net_prefix_to_many_bits_ipv4(self):
netmask_value = "33"
self.assertRaises(
ValueError, network_state.ipv4_mask_to_net_prefix, netmask_value
)
def test_mask_to_net_prefix_all_bits_ipv6(self):
netmask_value = "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"
expected = 128
prefix_value = network_state.ipv6_mask_to_net_prefix(netmask_value)
assert prefix_value == expected
def test_mask_to_net_prefix_ipv6(self):
netmask_value = "ffff:ffff:ffff:ffff::"
expected = 64
prefix_value = network_state.ipv6_mask_to_net_prefix(netmask_value)
assert prefix_value == expected
def test_mask_to_net_prefix_raises_value_error(self):
netmask_value = "ff:ff:ff:ff::"
self.assertRaises(
ValueError, network_state.ipv6_mask_to_net_prefix, netmask_value
)
def test_mask_to_net_prefix_to_many_bits_ipv6(self):
netmask_value = "129"
self.assertRaises(
ValueError, network_state.ipv6_mask_to_net_prefix, netmask_value
)
def test_mask_to_net_prefix_ipv4_object(self):
netmask_value = ipaddress.IPv4Address("255.255.255.255")
expected = 32
prefix_value = network_state.ipv4_mask_to_net_prefix(netmask_value)
assert prefix_value == expected
def test_mask_to_net_prefix_ipv6_object(self):
netmask_value = ipaddress.IPv6Address("ffff:ffff:ffff::")
expected = 48
prefix_value = network_state.ipv6_mask_to_net_prefix(netmask_value)
assert prefix_value == expected
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