diff options
Diffstat (limited to 'cloudinit/net/tests/test_dhcp.py')
| -rw-r--r-- | cloudinit/net/tests/test_dhcp.py | 120 |
1 files changed, 119 insertions, 1 deletions
diff --git a/cloudinit/net/tests/test_dhcp.py b/cloudinit/net/tests/test_dhcp.py index 51390249..91f503c9 100644 --- a/cloudinit/net/tests/test_dhcp.py +++ b/cloudinit/net/tests/test_dhcp.py @@ -8,7 +8,8 @@ from textwrap import dedent import cloudinit.net as net from cloudinit.net.dhcp import ( InvalidDHCPLeaseFileError, maybe_perform_dhcp_discovery, - parse_dhcp_lease_file, dhcp_discovery, networkd_load_leases) + parse_dhcp_lease_file, dhcp_discovery, networkd_load_leases, + parse_static_routes) from cloudinit.util import ensure_file, write_file from cloudinit.tests.helpers import ( CiTestCase, HttprettyTestCase, mock, populate_dir, wrap_and_call) @@ -64,6 +65,123 @@ class TestParseDHCPLeasesFile(CiTestCase): self.assertItemsEqual(expected, parse_dhcp_lease_file(lease_file)) +class TestDHCPRFC3442(CiTestCase): + + def test_parse_lease_finds_rfc3442_classless_static_routes(self): + """parse_dhcp_lease_file returns rfc3442-classless-static-routes.""" + lease_file = self.tmp_path('leases') + content = dedent(""" + lease { + interface "wlp3s0"; + fixed-address 192.168.2.74; + option subnet-mask 255.255.255.0; + option routers 192.168.2.1; + option rfc3442-classless-static-routes 0,130,56,240,1; + renew 4 2017/07/27 18:02:30; + expire 5 2017/07/28 07:08:15; + } + """) + expected = [ + {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74', + 'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1', + 'rfc3442-classless-static-routes': '0,130,56,240,1', + 'renew': '4 2017/07/27 18:02:30', + 'expire': '5 2017/07/28 07:08:15'}] + write_file(lease_file, content) + self.assertItemsEqual(expected, parse_dhcp_lease_file(lease_file)) + + @mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network') + @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery') + def test_obtain_lease_parses_static_routes(self, m_maybe, m_ipv4): + """EphemeralDHPCv4 parses rfc3442 routes for EphemeralIPv4Network""" + lease = [ + {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74', + 'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1', + 'rfc3442-classless-static-routes': '0,130,56,240,1', + 'renew': '4 2017/07/27 18:02:30', + 'expire': '5 2017/07/28 07:08:15'}] + m_maybe.return_value = lease + eph = net.dhcp.EphemeralDHCPv4() + eph.obtain_lease() + expected_kwargs = { + 'interface': 'wlp3s0', + 'ip': '192.168.2.74', + 'prefix_or_mask': '255.255.255.0', + 'broadcast': '192.168.2.255', + 'static_routes': [('0.0.0.0/0', '130.56.240.1')], + 'router': '192.168.2.1'} + m_ipv4.assert_called_with(**expected_kwargs) + + +class TestDHCPParseStaticRoutes(CiTestCase): + + with_logs = True + + def parse_static_routes_empty_string(self): + self.assertEqual([], parse_static_routes("")) + + def test_parse_static_routes_invalid_input_returns_empty_list(self): + rfc3442 = "32,169,254,169,254,130,56,248" + self.assertEqual([], parse_static_routes(rfc3442)) + + def test_parse_static_routes_bogus_width_returns_empty_list(self): + rfc3442 = "33,169,254,169,254,130,56,248" + self.assertEqual([], parse_static_routes(rfc3442)) + + def test_parse_static_routes_single_ip(self): + rfc3442 = "32,169,254,169,254,130,56,248,255" + self.assertEqual([('169.254.169.254/32', '130.56.248.255')], + parse_static_routes(rfc3442)) + + def test_parse_static_routes_single_ip_handles_trailing_semicolon(self): + rfc3442 = "32,169,254,169,254,130,56,248,255;" + self.assertEqual([('169.254.169.254/32', '130.56.248.255')], + parse_static_routes(rfc3442)) + + def test_parse_static_routes_default_route(self): + rfc3442 = "0,130,56,240,1" + self.assertEqual([('0.0.0.0/0', '130.56.240.1')], + parse_static_routes(rfc3442)) + + def test_parse_static_routes_class_c_b_a(self): + class_c = "24,192,168,74,192,168,0,4" + class_b = "16,172,16,172,16,0,4" + class_a = "8,10,10,0,0,4" + rfc3442 = ",".join([class_c, class_b, class_a]) + self.assertEqual(sorted([ + ("192.168.74.0/24", "192.168.0.4"), + ("172.16.0.0/16", "172.16.0.4"), + ("10.0.0.0/8", "10.0.0.4") + ]), sorted(parse_static_routes(rfc3442))) + + def test_parse_static_routes_logs_error_truncated(self): + bad_rfc3442 = { + "class_c": "24,169,254,169,10", + "class_b": "16,172,16,10", + "class_a": "8,10,10", + "gateway": "0,0", + "netlen": "33,0", + } + for rfc3442 in bad_rfc3442.values(): + self.assertEqual([], parse_static_routes(rfc3442)) + + logs = self.logs.getvalue() + self.assertEqual(len(bad_rfc3442.keys()), len(logs.splitlines())) + + def test_parse_static_routes_returns_valid_routes_until_parse_err(self): + class_c = "24,192,168,74,192,168,0,4" + class_b = "16,172,16,172,16,0,4" + class_a_error = "8,10,10,0,0" + rfc3442 = ",".join([class_c, class_b, class_a_error]) + self.assertEqual(sorted([ + ("192.168.74.0/24", "192.168.0.4"), + ("172.16.0.0/16", "172.16.0.4"), + ]), sorted(parse_static_routes(rfc3442))) + + logs = self.logs.getvalue() + self.assertIn(rfc3442, logs.splitlines()[0]) + + class TestDHCPDiscoveryClean(CiTestCase): with_logs = True |