def test_make_udpip_got_a_sensitive_port(self):
# Can you bind system ports ?
for sensitive_port in (0, 1, 1023):
node = Node()
self.assertIsNone(node.udp_sock)
self.assertEqual(node.udp_ip, (None, None))
with self.subTest(sensitive_port=sensitive_port):
node.make_udpip('localhost', sensitive_port)
if node.udp_sock:
# Really !!! You can bind a sensitive port.
# Are you root ?
# You must study security.
# You must open many security holes.
self.assertIsInstance(node.udp_sock, socket.socket)
self.assertEqual(node.udp_ip,
('localhost', sensitive_port))
node.release()
else:
# You cannot bind a sensitive port.
# You have a good security policy.
self.assertIsNone(node.udp_sock)
# However port must be set. for debug.
self.assertEqual(node.udp_ip,
('localhost', sensitive_port))
def test_make_udpip_got_out_of_range_port(self):
# OverflowError: getsockaddrarg: port must be 0-65535.
for invalid_port in (-1, 65535 + 1):
node = Node()
self.assertIsNone(node.udp_sock)
self.assertEqual(node.udp_ip, (None, None))
node.make_udpip('localhost', invalid_port)
self.assertIsNone(node.udp_sock)
self.assertEqual(node.udp_ip, ('localhost', invalid_port))
def test_make_udpip_success(self):
node = Node()
self.assertIsNone(node.udp_sock)
self.assertEqual(node.udp_ip, (None, None))
node.make_udpip('localhost', 4444)
self.assertIsInstance(node.udp_sock, socket.socket)
self.assertEqual(node.udp_ip, ('localhost', 4444))
node.release()
def test_make_udpip_got_on_the_boundary_port(self):
for on_the_boundary_port in (1024, 65535):
node = Node()
self.assertIsNone(node.udp_sock)
self.assertEqual(node.udp_ip, (None, None))
node.make_udpip('localhost', on_the_boundary_port)
self.assertIsInstance(node.udp_sock, socket.socket)
self.assertEqual(node.udp_ip, ('localhost', on_the_boundary_port))
node.release()
def test_make_udpip_doesnt_make_udpip(self):
pairs_of_host_port = [(None, 4444), ('localhost', None), (None, None)]
for host, port in pairs_of_host_port:
node = Node()
self.assertIsNone(node.udp_sock)
self.assertEqual(node.udp_ip, (None, None))
node.make_udpip(host, port)
self.assertIsNone(node.udp_sock)
self.assertEqual(node.udp_ip, (host, port))