# Copyright (C) 2019-2021 VyOS maintainers and contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 or later as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . import os import unittest import json from binascii import hexlify from netifaces import ifaddresses from netifaces import AF_INET from netifaces import AF_INET6 from vyos.configsession import ConfigSession from vyos.ifconfig import Interface from vyos.ifconfig import Section from vyos.util import read_file from vyos.util import cmd from vyos.util import dict_search from vyos.util import process_named_running from vyos.validate import is_intf_addr_assigned from vyos.validate import is_ipv6_link_local def is_mirrored_to(interface, mirror_if, qdisc): """ Ask TC if we are mirroring traffic to a discrete interface. interface: source interface mirror_if: destination where we mirror our data to qdisc: must be ffff or 1 for ingress/egress """ if qdisc not in ['ffff', '1']: raise ValueError() ret_val = False tmp = cmd(f'tc -s -p filter ls dev {interface} parent {qdisc}: | grep mirred') tmp = tmp.lower() if mirror_if in tmp: ret_val = True return ret_val class BasicInterfaceTest: class BaseTest(unittest.TestCase): _test_ip = False _test_mtu = False _test_vlan = False _test_qinq = False _test_ipv6 = False _test_ipv6_pd = False _test_mirror = False _base_path = [] _options = {} _interfaces = [] _qinq_range = ['10', '20', '30'] _vlan_range = ['100', '200', '300', '2000'] _test_addr = ['192.0.2.1/26', '192.0.2.255/31', '192.0.2.64/32', '2001:db8:1::ffff/64', '2001:db8:101::1/112'] _mirror_interfaces = [] # choose IPv6 minimum MTU value for tests - this must always work _mtu = '1280' def setUp(self): self.session = ConfigSession(os.getpid()) # Setup mirror interfaces for SPAN (Switch Port Analyzer) for span in self._mirror_interfaces: section = Section.section(span) self.session.set(['interfaces', section, span]) def tearDown(self): # Ethernet is handled in its derived class if 'ethernet' not in self._base_path: self.session.delete(self._base_path) # Tear down mirror interfaces for SPAN (Switch Port Analyzer) for span in self._mirror_interfaces: section = Section.section(span) self.session.delete(['interfaces', section, span]) self.session.commit() del self.session # Ethernet is handled in its derived class if 'ethernet' not in self._base_path: for intf in self._interfaces: self.assertFalse(os.path.isdir('/sys/class/net/{intf}')) def test_span_mirror(self): if not self._mirror_interfaces: self.skipTest('not enabled') # Check the two-way mirror rules of ingress and egress for mirror in self._mirror_interfaces: for interface in self._interfaces: self.session.set(self._base_path + [interface, 'mirror', 'ingress', mirror]) self.session.set(self._base_path + [interface, 'mirror', 'egress', mirror]) self.session.commit() # Verify config for mirror in self._mirror_interfaces: for interface in self._interfaces: self.assertTrue(is_mirrored_to(interface, mirror, 'ffff')) self.assertTrue(is_mirrored_to(interface, mirror, '1')) def test_interface_disable(self): # Check if description can be added to interface and # can be read back for intf in self._interfaces: self.session.set(self._base_path + [intf, 'disable']) for option in self._options.get(intf, []): self.session.set(self._base_path + [intf] + option.split()) self.session.commit() # Validate interface description for intf in self._interfaces: self.assertEqual(Interface(intf).get_admin_state(), 'down') def test_interface_description(self): # Check if description can be added to interface and # can be read back for intf in self._interfaces: test_string=f'Description-Test-{intf}' self.session.set(self._base_path + [intf, 'description', test_string]) for option in self._options.get(intf, []): self.session.set(self._base_path + [intf] + option.split()) self.session.commit() # Validate interface description for intf in self._interfaces: test_string=f'Description-Test-{intf}' tmp = read_file(f'/sys/class/net/{intf}/ifalias') self.assertEqual(tmp, test_string) self.assertEqual(Interface(intf).get_alias(), test_string) self.session.delete(self._base_path + [intf, 'description']) self.session.commit() # Validate remove interface description "empty" for intf in self._interfaces: tmp = read_file(f'/sys/class/net/{intf}/ifalias') self.assertEqual(tmp, str()) self.assertEqual(Interface(intf).get_alias(), str()) def test_add_single_ip_address(self): addr = '192.0.2.0/31' for intf in self._interfaces: self.session.set(self._base_path + [intf, 'address', addr]) for option in self._options.get(intf, []): self.session.set(self._base_path + [intf] + option.split()) self.session.commit() for intf in self._interfaces: self.assertTrue(is_intf_addr_assigned(intf, addr)) self.assertEqual(Interface(intf).get_admin_state(), 'up') def test_add_multiple_ip_addresses(self): # Add address for intf in self._interfaces: for addr in self._test_addr: self.session.set(self._base_path + [intf, 'address', addr]) for option in self._options.get(intf, []): self.session.set(self._base_path + [intf] + option.split()) self.session.commit() # Validate address for intf in self._interfaces: for af in AF_INET, AF_INET6: for addr in ifaddresses(intf)[af]: # checking link local addresses makes no sense if is_ipv6_link_local(addr['addr']): continue self.assertTrue(is_intf_addr_assigned(intf, addr['addr'])) def test_ipv6_link_local_address(self): # Common function for IPv6 link-local address assignemnts if not self._test_ipv6: self.skipTest('not enabled') for interface in self._interfaces: base = self._base_path + [interface] for option in self._options.get(interface, []): self.session.set(base + option.split()) # after commit we must have an IPv6 link-local address self.session.commit() for interface in self._interfaces: for addr in ifaddresses(interface)[AF_INET6]: self.assertTrue(is_ipv6_link_local(addr['addr'])) # disable IPv6 link-local address assignment for interface in self._interfaces: base = self._base_path + [interface] self.session.set(base + ['ipv6', 'address', 'no-default-link-local']) # after commit we must have no IPv6 link-local address self.session.commit() for interface in self._interfaces: self.assertTrue(AF_INET6 not in ifaddresses(interface)) def test_interface_mtu(self): if not self._test_mtu: self.skipTest('not enabled') for intf in self._interfaces: base = self._base_path + [intf] self.session.set(base + ['mtu', self._mtu]) for option in self._options.get(intf, []): self.session.set(base + option.split()) # commit interface changes self.session.commit() # verify changed MTU for intf in self._interfaces: tmp = read_file(f'/sys/class/net/{intf}/mtu') self.assertEqual(tmp, self._mtu) def test_mtu_1200_no_ipv6_interface(self): # Testcase if MTU can be changed to 1200 on non IPv6 # enabled interfaces if not self._test_mtu: self.skipTest('not enabled') old_mtu = self._mtu self._mtu = '1200' for intf in self._interfaces: base = self._base_path + [intf] self.session.set(base + ['mtu', self._mtu]) self.session.set(base + ['ipv6', 'address', 'no-default-link-local']) for option in self._options.get(intf, []): self.session.set(base + option.split()) # commit interface changes self.session.commit() # verify changed MTU for intf in self._interfaces: tmp = read_file(f'/sys/class/net/{intf}/mtu') self.assertEqual(tmp, self._mtu) self._mtu = old_mtu def test_8021q_vlan_interfaces(self): if not self._test_vlan: self.skipTest('not enabled') for interface in self._interfaces: base = self._base_path + [interface] for option in self._options.get(interface, []): self.session.set(base + option.split()) for vlan in self._vlan_range: base = self._base_path + [interface, 'vif', vlan] self.session.set(base + ['mtu', self._mtu]) for address in self._test_addr: self.session.set(base + ['address', address]) self.session.commit() for intf in self._interfaces: for vlan in self._vlan_range: vif = f'{intf}.{vlan}' for address in self._test_addr: self.assertTrue(is_intf_addr_assigned(vif, address)) tmp = read_file(f'/sys/class/net/{vif}/mtu') self.assertEqual(tmp, self._mtu) self.assertEqual(Interface(vif).get_admin_state(), 'up') def test_8021ad_qinq_vlan_interfaces(self): if not self._test_qinq: self.skipTest('not enabled') for interface in self._interfaces: base = self._base_path + [interface] for option in self._options.get(interface, []): self.session.set(base + option.split()) for vif_s in self._qinq_range: for vif_c in self._vlan_range: base = self._base_path + [interface, 'vif-s', vif_s, 'vif-c', vif_c] self.session.set(base + ['mtu', self._mtu]) for address in self._test_addr: self.session.set(base + ['address', address]) self.session.commit() for interface in self._interfaces: for vif_s in self._qinq_range: tmp = json.loads(cmd(f'ip -d -j link show dev {interface}.{vif_s}'))[0] self.assertEqual(dict_search('linkinfo.info_data.protocol', tmp), '802.1ad') for vif_c in self._vlan_range: vif = f'{interface}.{vif_s}.{vif_c}' for address in self._test_addr: self.assertTrue(is_intf_addr_assigned(vif, address)) tmp = read_file(f'/sys/class/net/{vif}/mtu') self.assertEqual(tmp, self._mtu) def test_interface_ip_options(self): if not self._test_ip: self.skipTest('not enabled') for interface in self._interfaces: arp_tmo = '300' path = self._base_path + [interface] for option in self._options.get(interface, []): self.session.set(path + option.split()) # Options self.session.set(path + ['ip', 'arp-cache-timeout', arp_tmo]) self.session.set(path + ['ip', 'disable-arp-filter']) self.session.set(path + ['ip', 'disable-forwarding']) self.session.set(path + ['ip', 'enable-arp-accept']) self.session.set(path + ['ip', 'enable-arp-announce']) self.session.set(path + ['ip', 'enable-arp-ignore']) self.session.set(path + ['ip', 'enable-proxy-arp']) self.session.set(path + ['ip', 'proxy-arp-pvlan']) self.session.set(path + ['ip', 'source-validation', 'loose']) self.session.commit() for interface in self._interfaces: tmp = read_file(f'/proc/sys/net/ipv4/neigh/{interface}/base_reachable_time_ms') self.assertEqual(tmp, str((int(arp_tmo) * 1000))) # tmo value is in milli seconds tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/arp_filter') self.assertEqual('0', tmp) tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/arp_accept') self.assertEqual('1', tmp) tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/arp_announce') self.assertEqual('1', tmp) tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/arp_ignore') self.assertEqual('1', tmp) tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/forwarding') self.assertEqual('0', tmp) tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/proxy_arp') self.assertEqual('1', tmp) tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/proxy_arp_pvlan') self.assertEqual('1', tmp) tmp = read_file(f'/proc/sys/net/ipv4/conf/{interface}/rp_filter') self.assertEqual('2', tmp) def test_interface_ipv6_options(self): if not self._test_ipv6: self.skipTest('not enabled') for interface in self._interfaces: dad_transmits = '10' path = self._base_path + [interface] for option in self._options.get(interface, []): self.session.set(path + option.split()) # Options self.session.set(path + ['ipv6', 'disable-forwarding']) self.session.set(path + ['ipv6', 'dup-addr-detect-transmits', dad_transmits]) self.session.commit() for interface in self._interfaces: tmp = read_file(f'/proc/sys/net/ipv6/conf/{interface}/forwarding') self.assertEqual('0', tmp) tmp = read_file(f'/proc/sys/net/ipv6/conf/{interface}/dad_transmits') self.assertEqual(dad_transmits, tmp) def test_dhcpv6pd_auto_sla_id(self): if not self._test_ipv6_pd: self.skipTest('not enabled') prefix_len = '56' sla_len = str(64 - int(prefix_len)) delegatees = ['dum2340', 'dum2341', 'dum2342', 'dum2343', 'dum2344'] for interface in self._interfaces: path = self._base_path + [interface] for option in self._options.get(interface, []): self.session.set(path + option.split()) address = '1' # prefix delegation stuff pd_base = path + ['dhcpv6-options', 'pd', '0'] self.session.set(pd_base + ['length', prefix_len]) for delegatee in delegatees: section = Section.section(delegatee) self.session.set(['interfaces', section, delegatee]) self.session.set(pd_base + ['interface', delegatee, 'address', address]) # increment interface address address = str(int(address) + 1) self.session.commit() for interface in self._interfaces: dhcpc6_config = read_file(f'/run/dhcp6c/dhcp6c.{interface}.conf') # verify DHCPv6 prefix delegation self.assertIn(f'prefix ::/{prefix_len} infinity;', dhcpc6_config) address = '1' sla_id = '0' for delegatee in delegatees: self.assertIn(f'prefix-interface {delegatee}' + r' {', dhcpc6_config) self.assertIn(f'ifid {address};', dhcpc6_config) self.assertIn(f'sla-id {sla_id};', dhcpc6_config) self.assertIn(f'sla-len {sla_len};', dhcpc6_config) # increment sla-id sla_id = str(int(sla_id) + 1) # increment interface address address = str(int(address) + 1) # Check for running process self.assertTrue(process_named_running('dhcp6c')) for delegatee in delegatees: # we can already cleanup the test delegatee interface here # as until commit() is called, nothing happens section = Section.section(delegatee) self.session.delete(['interfaces', section, delegatee]) def test_dhcpv6pd_manual_sla_id(self): if not self._test_ipv6_pd: self.skipTest('not enabled') prefix_len = '56' sla_len = str(64 - int(prefix_len)) delegatees = ['dum3340', 'dum3341', 'dum3342', 'dum3343', 'dum3344'] for interface in self._interfaces: path = self._base_path + [interface] for option in self._options.get(interface, []): self.session.set(path + option.split()) # prefix delegation stuff address = '1' sla_id = '1' pd_base = path + ['dhcpv6-options', 'pd', '0'] self.session.set(pd_base + ['length', prefix_len]) for delegatee in delegatees: section = Section.section(delegatee) self.session.set(['interfaces', section, delegatee]) self.session.set(pd_base + ['interface', delegatee, 'address', address]) self.session.set(pd_base + ['interface', delegatee, 'sla-id', sla_id]) # increment interface address address = str(int(address) + 1) sla_id = str(int(sla_id) + 1) self.session.commit() # Verify dhcpc6 client configuration for interface in self._interfaces: address = '1' sla_id = '1' dhcpc6_config = read_file(f'/run/dhcp6c/dhcp6c.{interface}.conf') # verify DHCPv6 prefix delegation self.assertIn(f'prefix ::/{prefix_len} infinity;', dhcpc6_config) for delegatee in delegatees: self.assertIn(f'prefix-interface {delegatee}' + r' {', dhcpc6_config) self.assertIn(f'ifid {address};', dhcpc6_config) self.assertIn(f'sla-id {sla_id};', dhcpc6_config) self.assertIn(f'sla-len {sla_len};', dhcpc6_config) # increment sla-id sla_id = str(int(sla_id) + 1) # increment interface address address = str(int(address) + 1) # Check for running process self.assertTrue(process_named_running('dhcp6c')) for delegatee in delegatees: # we can already cleanup the test delegatee interface here # as until commit() is called, nothing happens section = Section.section(delegatee) self.session.delete(['interfaces', section, delegatee])