def test_tftp_service_rebinds_on_HUP(self):
# Initial set of interfaces to bind to.
interfaces = {"1.1.1.1", "2.2.2.2"}
self.patch(
tftp_module, "get_all_interface_addresses", lambda: interfaces
)
tftp_service = TFTPService(
resource_root=self.make_dir(),
client_service=Mock(),
port=factory.pick_port(),
)
tftp_service.updateServers()
# The child services of tftp_services are named after the
# interface they bind to.
self.assertEqual(
interfaces, {server.name for server in tftp_service.getServers()}
)
# Update the set of interfaces to bind to.
interfaces.add("3.3.3.3")
interfaces.remove("1.1.1.1")
# Ask the TFTP service to update its set of servers.
tftp_service.updateServers()
# We're in the reactor thread but we want to move the reactor
# forwards, hence we need to get all explicit about it.
reactor.runUntilCurrent()
# The interfaces now bound match the updated interfaces set.
self.assertEqual(
interfaces, {server.name for server in tftp_service.getServers()}
)
def test_tftp_service(self):
# A TFTP service is configured and added to the top-level service.
interfaces = [factory.make_ipv4_address(), factory.make_ipv6_address()]
self.patch(
tftp_module, "get_all_interface_addresses", lambda: interfaces
)
example_root = self.make_dir()
example_client_service = Mock()
example_port = factory.pick_port()
tftp_service = TFTPService(
resource_root=example_root,
client_service=example_client_service,
port=example_port,
)
tftp_service.updateServers()
# The "tftp" service is a multi-service containing UDP servers for
# each interface defined by get_all_interface_addresses().
self.assertIsInstance(tftp_service, MultiService)
# There's also a TimerService that updates the servers every 45s.
self.assertThat(
tftp_service.refresher,
MatchesStructure.byEquality(
step=45,
parent=tftp_service,
name="refresher",
call=(tftp_service.updateServers, (), {}),
),
)
expected_backend = MatchesAll(
IsInstance(TFTPBackend),
AfterPreprocessing(
lambda backend: backend.base.path, Equals(example_root)
),
AfterPreprocessing(
lambda backend: backend.client_service,
Equals(example_client_service),
),
)
expected_protocol = MatchesAll(
IsInstance(TFTP),
AfterPreprocessing(
lambda protocol: protocol.backend, expected_backend
),
)
expected_server = MatchesAll(
IsInstance(internet.UDPServer),
AfterPreprocessing(lambda service: len(service.args), Equals(2)),
AfterPreprocessing(
lambda service: service.args[0], Equals(example_port) # port
),
AfterPreprocessing(
lambda service: service.args[1], expected_protocol # protocol
),
)
self.assertThat(tftp_service.getServers(), AllMatch(expected_server))
# Only the interface used for each service differs.
self.assertItemsEqual(
[svc.kwargs for svc in tftp_service.getServers()],
[{"interface": interface} for interface in interfaces],
)
def test_tftp_service_does_not_bind_to_link_local_addresses(self):
# Initial set of interfaces to bind to.
ipv4_test_net_3 = IPNetwork("203.0.113.0/24") # RFC 5737
normal_addresses = {
factory.pick_ip_in_network(ipv4_test_net_3),
factory.make_ipv6_address(),
}
link_local_addresses = {
factory.pick_ip_in_network(IPV4_LINK_LOCAL),
factory.pick_ip_in_network(IPV6_LINK_LOCAL),
}
self.patch(
tftp_module,
"get_all_interface_addresses",
lambda: normal_addresses | link_local_addresses,
)
tftp_service = TFTPService(
resource_root=self.make_dir(),
client_service=Mock(),
port=factory.pick_port(),
)
tftp_service.updateServers()
# Only the "normal" addresses have been used.
self.assertEqual(
normal_addresses,
{server.name for server in tftp_service.getServers()},
)